Teaching Mathematics And Science In Elementary Level Education Essay

Teaching mathematics and scientific discipline in simple degree is a ambitious undertaking because of the negative attitude pupils have. Teachers must so be really careful when learning this topic and guarantee that they encourage pupils in the topic ( Muschala J, Muschala G & A ; Muschala E, 2010 ) . They must guarantee that they use all the techniques available to promote pupils and do them believe that mathematics is non is non difficult. Mathematicss and scientific discipline are the impulsive topics in most countries of the existent life state of affairss therefore it is indispensable for pupils to understand them. Due to the importance of mathematics and scientific discipline, several criterions have been put frontward to steer instructors. Such are formulated by the National Council of Teachers of Mathematics ( NCTM ) and National Science Education Standards ( NSES ) . The criterions are aimed at assisting instructors to use the best instruction methods and help them in promoting pupils to wish the topics. The first criterion provinces that the instruction system should be structured in a mode that encourages effectual instruction and acquisition ( Ediger 2003 ) . This means that all that instructors require in instruction should be availed to them. Another standard provinces that attitude and the acquisition of the pupils is extremely dictated by the learning methods applied by their instructors ( Westaway 2007 ) . Teachers must hence hold the ability to interact with pupils good and be selective in the instruction methods since this determines the apprehension of the pupils. The 3rd criteri on provides that the efficiency of instructors is dictated by the beliefs and attitude a instructor has on scientific discipline topics. It is hence of import for instructors to hold the right attitude since this will impact good on the acquisition of the pupils. The 4th criterion provides that the procedure of acquisition is both societal and single procedure and pupils should be encouraged to work out existent life state of affairss in groups or separately. The other criterion is that instructors must understand the assorted backgrounds and their understanding abilities and maintain them in head when instruction. The instructor must seek to fulfill the particular demands of the pupils and handle them consequently. But above all, pupils must be encouraged that all are capable of understanding mathematics and scientific discipline ( Westaway 2007 ) . Unit of measurement OF STUDY FOR FRACTIONS, DECIMALS AND PERCENTS In this paper is a proposed unit of survey in the topic of mathematics, affecting fractions, decimals and per centums. The ends and aims of this survey unit is to guarantee that the unit is taught efficaciously with the right stuff. The other end or aim is to guarantee that the learning methods applied by the instructor serves to actuate the pupils to understand and larn mathematics. Another aim is to guarantee that the instructor has a positive attitude towards what he is learning because this will act upon the pupils positively. It is besides an aim of this unit to promote pupils learn as a group every bit good as to set single attempts in understanding the constructs of mathematics. The last end and aim is to guarantee that instructors understand the diverseness of background and difference in understanding capacities of pupils and handle them consequently. The stuffs and resources needed in this unit are divided into three classs which are enactive, symbolic and iconic ( Ediger 2003 ) . Enactive stuffs are the touchable resources that give pupils a custodies on experience in acquisition. The iconic stuffs are the audio ocular AIDSs that help the pupils by hearing and seeing. The symbolic stuffs are the text editions and other printed stuff that explains the constructs to the pupils. In this unit, the instructor requires relevant text editions which must be certified by the relevant governments. Other resources like written cards, pieces of chalk, chalkboard, short movie, physical objects like Mangifera indicas and any other relevant stuff harmonizing to the category of the pupils. The cards must be written in different colourss and the physical objects must besides be of different colourss to do acquisition interesting for the pupils. The instructor must publish instructions to pupils in a linguistic communication apprehensible to them and seting into consideration the diverse demands of the pupils. The instructions must be issued in a sequence and accompanied by the right stuffs and resources ( Ediger 2003 ) . The first phase in issue of the instructions must be by usage of the physical objects to present the thought to the pupils. For illustration, the pupils might be asked to take oranges from a given figure of oranges in a basket, say ten, and asked how many are staying. They can besides be asked to number the figure of ruddy balls and the figure of white balls and show them in relation to the entire figure of balls present. At this phase, the instructor must guarantee that all the pupils take part to the full and are attentive plenty. The instructor must do this every bit interesting as possible by doing merriment and affecting the pupils in physical battles. The other phase must be through the usage of images or other iconic stuffs like short movies and illustrations. The instructor should besides prosecute the pupils full by inquiring them inquiries and necessitating them to reply. For illustration, the instructor might keep a card with three boxes in it, two of which are shaded ruddy. The instructor might so inquire the pupils to number the entire figure of boxes and the figure of boxes shaded ruddy. They should so be helped to show the figure of ruddy boxes in relation to the entire figure. Other iconic stuffs should be used the same manner and in an interesting mode. After usage of the iconic stuffs the instructor must so utilize the symbolic stuffs which is application of what the pupils have learnt to the what is written in text books. The instructor should steer the pupils in reading the texts, associating the content to what they have done in the old stairss and so understanding the constructs. In all the stairss, the instructor must help the pupils to associate what they have learnt to existent life state of affairss and even necessitate pupils to come up with more illustrations. The instructor should frequently inquire the pupils whether they understand the constructs and even measure for himself at every phase. He should on a regular basis inquire the pupils whether they have troubles in their apprehension and attend to the troubles adequately ( Ediger 2003 ) . Merely after all the troubles are solved should the instructor continue to the following measure. Students should be to the full involved and the instructor must utilize wise methods of spoting troubles in understanding since pupils may shy off from stating them. The 12 scientific discipline procedures should be incorporated to the full in learning this unit. These procedures include doing observations, inferring, taking measurings, pass oning, seting things into classs and doing anticipations. These should be used to the full in that the instructor should allow the pupils learn through the procedures ( Westaway 2007 ) . When a instructor puts up a printed card for the pupils to see, he must steer them into doing the right observations, understanding or deducing, pass oning to the others and sorting the job. This will heighten engagement and apprehension of the pupils. Harmonizing to Muschala J, Muschala G & A ; Muschala E ( 2010 ) manipulatives are the learning AIDSs that help pupils to make a theoretical account of constructs and place relationships in the theoretical accounts. These should be used since the trigger the imaginativeness of the pupils and assist them to hold on the whole mathematical constructs. The instructor should measure the apprehension of the pupils at every phase and guarantee that they understand. The appraisals should me formulated in a manner to promote the pupils and non to deter them. They should be disputing but at the same clip non excessively hard. The instructor must walk the tight rope in equilibrating the grade of trouble ( Muschala J, Muschala G & A ; Muschala E, 2010 ) . The appraisal must be consecutive get downing with the simple jobs traveling to the ambitious 1s and non frailty versa. At the terminal of the unit, the instructor should seek response from the pupils on how they found the topic ( Ediger 2003 ) . The instructor should ask from them on new ways to use what they have learnt in existent life state of affairss. This will be an encouragement to the pupils and will fix them for the following unit. It is clear that even if pupils think that mathematics is difficult, using the right instruction techniques and the right mathematics linguistic communication can assist to do them like the topic.

Statistics: Practice Problems Solutions

1. (24 points) If needed, additional workspace is provided on the next sheet. Doug Moodie is the president of Garden Products Limited. Over the last 5 years, his vice president of marketing has been providing the sales forecast using his special â€Å"focus† forecasting technique. The actual sales for the past ten years and the forecasts from the vice president of marketing are given below. Year |Sales |VP/Marketing Forecast | |1 |170,300 |– | |2 |168,250 |– | |3 |165,700 |– | |4 |169,000 |– | |5 |168,000 |– | |6 |167,300 |170,000 | |7 |175,250 |170,000 | |8 |172,500 |180,000 | |9 |156,700 |180,000 | |10 |176,300 |160,000 | Doug wonders if perhaps a weighted moving average or an exponential smoothing approach to forecasting might be better than having the vice president of arketing prepare the forecast. Doug wants to evaluate a two-period weighted moving average with weights of 0. 7 and 0. 3 for the most recent and next most recent p eriods. He also wants to evaluate the exponential smoothing with an ? = 0. 3 and a starting forecast for period 6 of 168,000 units. a) Which of the three methods (weighted moving average, exponential smoothing and VP/Marketing) provides the best forecasting method if you were to evaluate these methods for their forecasting accuracy for Years 8 through 10. Use one of the evaluation methods we have discussed. See next page b) In part a) we identified which is the best method of those three methods.However, would you recommend using this method for forecasting sales for Year 11? Why or Why not? See next page c) What would be the forecast for Year 11 using both the weighted moving average and the exponential smoothing methods? See next page [pic] 2. (23 points) Lake Charles Seafood makes 500 wooden packing boxes for fresh seafood per day, working in two 10-hour shifts. The marketing department has advised that demand has increased so that 650 wooden boxes for fresh seafood are required daily. Due to higher demand, plant managers are considering operating three 8-hour shifts instead. Productivity is measured in terms of boxes produced per hour worked. ) Calculate the productivity of the operation for the two-shift operation producing 500 boxes. 500/20 = 25 boxes per hour b) Calculate the productivity of the operation for the three-shift operation producing 650 boxes. 650/24 = 27. 08 c) Using the two-shift operation as the base, calculate the percentage difference between the two-shift operation and the three-shift operation as described in parts a) and b). (27. 08-25)25 = 1. 083 or an increase of 8. 3% d) Now suppose that the plant managers want to be able to produce the 650 boxes but only use two 10-hour shifts. What must the productivity be to achieve this production output? 650/20 = 32. 50 boxes per hour ) If the company believes that to be competitive if it is to produce 650 wooden boxes, the company must reach a productivity measure of 40 boxes per hour. What are the maximum hours a day the company can work? 650/x = 40 X = 16. 25 hours 3. (19 points) Additional workspace is provided on the next page. Students in a science class have just received their grades on the first test. The instructor has provided information about the first test grades in some previous classes as well as the final average for the same students. Some of these grades have been sampled and are as follows: Student |1 |2 |3 |4 |5 |6 |7 |8 |9 | |1st Test Grade |98 |77 |88 |80 |96 |61 |66 |95 |69 | Final Average |93 |78 |84 |73 |84 |64 |64 |95 |76 | |You are also provided the results from several different linear regression relationships for the above data. These provide different regression relationships looking at different combination of independent and dependent variables. [pic]a) Develop a linear regression model that can be used to predict the final course average based on the first test grade. [pic] b) Predict the final average of a student who made an 83 on the first test. [pic] c) Would you recommend using this relationship for forecasting the final averages? Why? Also, explain how strong the relationship is between these two variables. [pic] d) Suppose a student scored a 38 on the first test. Predict the final average of a student who had this score?What cautions would you recommend about using the linear regression relationship for predicting a final average? [pic] 4. (18 points) David Upton is president of Upton manufacturing, a producer of Go-Kart tires. Upton makes 1,000 tires per day with the following resources: Labor:400 hours at $12. 50 per hour Raw Material:20,000 pounds per day at $1. 00 per pound Energy:$5,000 per day Capital:$10,000 per day a) What is the labor productivity for these tires at Upton Manufacturing expressed per labor hour? Labor productivity = 1000 tires/400 hours = 2. 5 tires/hour. b) What is the multi-factor (total factor) productivity expressed per dollar? Original Multifactor productivity is 1000 tires/(40 0 ? $12. 50 + 20,000 ? $1 + $5,000 + $10,000) = ,000 tires/$40,000 = 0. 025 tires/dollar. c) What is the percent change in the total factor productivity if Upton can reduce the energy bill by $1,000 without cutting production or changing any other inputs? Original Multifactor productivity is 1000 tires/(400 ? $12. 50 + 20,000 ? $1 + $5,000 + $10,000) = 1,000 tires/$40,000 = 0. 025 tires/dollar. Revised Multifactor productivity changes from 1,000/40,000 to 1,000/39,000, or from 0. 025 to 0. 02564 The ratio is 1. 0256, so the change is a 2. 56 percent increase. 5. (16 points) a) Briefly discuss two ways that operations management can provide a company with a competitive advantage. 8 points Open-ended answerSupports the other functions, delivers what is promised to the customer; provides a competitive advantage; provides a low cost option; plan and execute the production and delivery of the firm’s goods and services; Ops Mgt is defined as the design, operation, and improvement o f the systems that create and deliver the firm’s primary products and services. b) Briefly discuss two of the major issues that are facing operations management staff in the current business environment. 8 points Open-ended answer Global challenge, automation and technology, commoditization of the supplier, coordinating the relationships between mutually supportive but separate organizations, optimizing global supplier, production, and distribution networks, increased co-production of goods and services, managing customer touch points, raising senior management awareness of operations as a significant competitive weapon.

In what ways can an organization’s structure and culture be internal strengths or weaknesses Essay

Every organization has a corporate structure and culture these vary based on several variables. I will discuss the most common which is a divisional structure, which is appropriate for a large corporation as well. According to our text regardless of the size of a company to be strong the basic structure within the company must easily support a strategy under consideration by top management. Management in turn must decide whether the proposed strategy is feasible or if the structure should be changed to reflect the company’s mission. Basically a company must clearly define their mission, objectives, strategies and end goal. To be successful the company must in turn structure management, divisions, and employees in a strategic way in order to gain a successful outcome. Unsuccessful companies that I have been a part of tend to have a strategic structure in place, but the weakness comes in as soon as they quit following the plan or deviate from the structure. From my experience a structure is as successful as the culture within the company. The internal values, beliefs and expectations if clearly shared and followed by all employees will directly affect the success of a company. According to our text in order to be successful a corporate culture will fulfill these functions: 1.Convey a sense of identity for employees.  2.Help generate employee commitment to something greater than themselves. 3.Adds to stability of the organization as a social system. 4.Serves as a frame of reference for employees to use to make sense of organizational activities and to use as a guide for appropriate behavior. When a company does not fulfill these functions you will find weakness as well as unhappy employees, which in my opinion can be one of the greatest weaknesses any company can have. The key to success is to follow the strategies and fulfill a corporation’s mission thus meeting their objectives. I have been a part of very successful company’s as well as some that have been unsuccessful. I have found that the easiest way to weaken a structure is when management does not listen to or value their employees input. Other areas of weakness are when management doesn’t honor their word or the company goals. An achilles heal for any company is a weak inefficient human resources department. When the HR team hires ineffective and unreliable managers they must immediately jump in and begin to train or assist that manager in following the company’s strategic plan, or let go of that manager after a time. Otherwise the employees of that department will negatively affect the culture so fast and it is incredibly difficult and lengthy to rebuild that culture. Not only do you loose valuable employees, but disgruntled employees begin to speak negatively about the company to family, friends, and social media. This causes any company time and money to repair their culture within and outside of the company, hence great weakness arises.

Child observation Essay Example | Topics and Well Written Essays - 1750 words - 1

Child observation - Essay Example One of the first things I was able to observe Luke doing was playing with Lego building blocks. Luke is a Lego maniac. He builds elaborate structures with these toys, but is always very careful to keep the â€Å"sets† of Lagos sorted out from one another. This way he can build them the â€Å"right† way by following the instructions. When he combines sets to build one structure, he is very careful to observe which set it came from so he can return it to its proper place. The idea of equilibrium is an important idea introduced by Piaget (Slavin). According to this theory, when something new is introduced to the child, a disequilibrium is created in the child’s understanding of how the world works. This disequilibrium is what causes learning. I was able to observe this when Mary introduced a new type of Lego set to Luke. I notice that Luke would follow a pattern in building his structures. He always used dark, sturdy Lagos for the base of his structures and lighter colored, thin Lagos at the top. This new set of Lagos, however, did not have any dark, sturdy Lego’s. I could tell that Luke was keen to use his new set, but could not reconcile the fact that the new dark Lagos would not work for the base. He dealt with the new situation by excluding the new Lagos from the building. Eventually, Luke may realize that it is not the color that makes for a good base, but the thickness of the blocks. When he does this, he will have assimilate new i nformation and will have learned something new. While watching Mary serve Luke and his younger sister some lunch, I was able to observe another hallmark of Piaget’s research, namely, Luke’s early ability to display the idea of conservation. Juice was being poured into two different sized glasses. Luke’s was tall and thin while his sister’s glass was shorter and broader. Luke’s sister began to cry because Luke got â€Å"more†. His glass did appear to have more due to the

Why do consumers like to engage in conspicuous consumption What are Essay - 1

Why do consumers like to engage in conspicuous consumption What are the marketing implications - Essay Example This research paper examines why consumers buy some goods for conspicuous consumption at prices which are normally higher. The papers will examine the concepts that try to explain this behaviour, and examine other factors. The paper will also explain the goods which qualify to be termed as conspicuous consumption. Market implication of in accordance to the 7Ps in relation to this phenomenon will also be analysed and a conclusion drawn after the analysis. Veblen (1899) provided an explanation of conspicuous consumption behaviour in his prominent concept of â€Å"the leisure class†. He notes that in order for people to show their wealth or power their have to put it into evidence, since self esteem can only be rewarded through evidence. Thus, one way of an individual showing off his wealth is through conspicuous consumption. Using Veblen, conspicuous good can be defined as a product whose consumption can be viewed by all in the market economy. In this context â€Å"Veblen effect† will refer to conspicuous consumption, which is seen as an action of consciously displaying and consuming a product that is bought at a higher price that its marginal cost. Some literature has tried to give answers to the first question. It is assumed that a person’s value is directly enhanced by purchasing higher priced products. (Nagel, 2002) unfortunately, this approach does not explain why individuals will prefer premium pricing. To (Trigg, 2001) explains that people prefer conspicuous goods because of monopolistic goods. However, other scholars are in view that individuals use conspicuous consumption as means of evaluating their social status in the society. (Nagel, 2002) This agrees fully with Veblen’s concept. Yet again, it is not easy to generalize the â€Å"Veblen effect† in this competitive market. The second question that regards what product can be termed as conspicuous can only be answered by trying to examine the characteristics

Streetcar marketing communication and Marketing mix Case Study

Streetcar marketing communication and Marketing mix - Case Study Example The strategy used by the streetcar company is very exceptional as it also works in a way to preserve the environment. The advocates for a greener environment have affirmed that indeed there is no need to have many cars on the road and having a business that offers car sharing and car rental services is very effective way of ensuring that the emissions are reduced. The elements that are involved in the marketing of any company are not conclusive since there are a variety of them. Insight to the buyer behaviour and their decision making process is entrenched in the core marketing concepts. Currently, marketers have been able to develop theories and prove them scientifically to explain the stable rules that apply to the marketing sectors and business communication. The major concern is addressing the observable features that are similar among all or most consumers and try to understand them vividly. It is very difficult for one to ascertain that marketing has a theory and that it is justifiable on the basis that it is logic and consistent. In the modern market regimen, the core concepts include the market strategy, eCommunication and eCommerce. Different methods of communication are involved by different companies to market themselves as this is the first process that will initiate the eagerness in customers to buy. When customers become aware of a certain product, it evokes a curiosity. Streetcar has established good strategy that incorporates eCommerce and eCommunication. These concepts are important in marketing because the strategy for marketing will enable a company to come up with a better marketing plan which is cost effective and successful. The understanding of human behaviour can enable streetcar to meet their marketing objectives which can be evaluated by certain aspects that are practical and measurable for instance the amount of sales, the profits, the market share and the ROI- return of investment. Objectives and Strategies The main objective of implementing communication strategies in a business is to increase the sales of the business and as a result increase its profits. The success of the marketing strategy will depend on the appropriate coordination and implementation of all the elements of a marketing mix which include pricing, promotions, place and the product. Business success is achieved by the realization of the business objective. The communication style in marketing is to give answers to the following questions about customers; who How When Where And why do they buy The streetcar company has integrated all the answers to the above questions and has established a strong customer base in the UK (Pelsmacker et al 2007). Evaluation of the market, control systems and use of direct communication allows interactive exchange of information and effective marketing of the products offered (Fill 2006). Streetcar is one of the biggest car sharing and car rental clubs in the United Kingdom and it was est ablished in 2004. The customers are mainly the people who do not have personal cars and those who don't use their cars regularly. Currently, the clubs has over 40,000 members all over the country and it is operating in seven cities with seven

Depression Research Paper Example | Topics and Well Written Essays - 1500 words

Depression - Research Paper Example Psychologists caution parents to handle children well in the quest to address this menace. After all, this problem affects all people in the world directly and indirectly. Depression is one of the most common mental problems in the world today. This mental condition arises when a person has much more do than they can handle at one time. Overcome Depression Organization (2009) implies that the world has become more competitive, busy, and stressful, and most people are having challenges coping with these activities. They eventually develop stress, which subsequently develops into depression. The World Health Organization estimates that more than 350 million people have depression in the world. This makes depression one of the most common disorders in the world today. The major symptoms of depression include loneliness, lack of moods, poor concentration, poor appetite, low self worth feelings and guiltiness (Marcus et al, 2012). Recent studies indicate that depression can arise due to earlier life experiences. Psychologists and scientists found out that child abuse and neglect is likely to cause depression in the future. Child abuse may take the form of physical assaults, emotional and psychological abuse including insults, and sexual abuse. The World Health Organization (2012) report on burden of disease implied that 51% of people neglected and abused in their childhood developed depression later in life. Childhood depression is easy to detect with the major symptoms, which are the same as for the adults. Childhood stress and depression is preventable and treatable with the various intervention and treatment strategies. Depression is a mental condition associated with low moods, which affects the way a person thinks, behaves, and feels. In most cases, depressed people tend to think a lot feel anxious, sad, guilty, worthless, hopeless, and worried. The depressed also lose interest in most activities

Marketing Assignment Example | Topics and Well Written Essays - 1750 words

Marketing - Assignment Example Brands aimed at the high tier market moved on to defensive mechanisms like slashing prices, holding discreet sales or moving into completely new product lines even as they battled massive debts and decreasing popularity. While fashion brands like Ralph Lauren, Donna Karan, Calvin Klein, Dolce & Gabbana and Armani were the pioneers in introducing secondary mid-priced brands for a secondary target market, others brands soon followed suit. However the diversification strategy was a double edged sword, with the perception of people being either that the brands were diluting their essence and the ‘luxury status’ that they stood for or that there are simply too many, too outrageously priced luxury brands in a market where they shouldn’t be. Cheap chic and e-shopping have become the reigning trends in the industry and as the local customer becomes more price savvy and inclined towards individual fashion choices, luxury brands have become something of a frivolous fantasy for the masses. But humans naturally gravitate towards things which sparkle and which may provide them with a kind of prestige and glamour; they just don’t want it to be a diluted version of old luxury or completely out of there budget. We are launching a new clothing label for the people who want the good things in life, want them to be available with convenience yet delivering a unique and customized experience with the purchase. BlackSilk © clothing label will carry items like cocktail dresses, semi-casual evening wear, formal wear for the work environment. The core strength of the brand will be good looking, good quality products with the option of customization and ease of availability through a completely integrated online store. The cost structure will be flexible, with a certain sum set for the template clothing and extra cost for any other additions the customer might want to make. The emphasis will be to merge the look, style and grace of the ‘roaring twenti es’ with the wearablity and sensible use as required by the fast paced modern life of the 21st century. The Core Value for customers will be the affordable luxury while the Actual Products will be BlackSilk © clothes, which will have a high quality and a focus on the aesthetics along with the option of customization such as our very crucial offering of Tres grande option for customers who are sizes 14 and above. This is keeping in line with the recent trends in the American health and lifestyle which show a shift towards higher weight and body mass in the general population. We would want to offer the same style and convenience to a size 2 or size 16 customer and make them feel comfortable with the choices we have on offer. The Augmented product offering would include getting customer feedback and giving them the option of changing their customization options within 30 days of purchase (exclusive of delivery time) or having the same kind of options replicated on a different template dress for a discounted price. The market segmentation for the clothing line will be done on the basis of demographics and psychographics with a niche marketing strategy initially which would be converted to a differentiated strategy once we have reached a core group of customers and the level of recourses are feasible for that. Primary Target market: Age: 21-45 Income: Varying;

Secret Master Ancient and Accepted Scottish Rite Essay

Secret Master Ancient and Accepted Scottish Rite - Essay Example That this knowledge is to be used in the service of all with whom the vows are contracted, needs to be stated. The expectation is not only that Secret 'Woe betide anyone who is striving for a rank and is not worthy of it.' Bearing in mind the secrets, oaths and responsibilities they incur, this warns the candidate that he had better be certain that he possesses the integrity and strength of character to live of up the role of Secret Master. The 'woe betide' may possibly be extended to the penalties, symbolic or otherwise. An individual may aspire to this level as a natural progression, and the Masonic ethos is to assist him in reaching his greatest potential. The final analysis of this warning is 'Do not try to be what you are not, nor to have ideas above your station.' The person considering himself worthy of this position must be of strong character, know his own mind, believe in his abilities and will meet the demands asked of him in the 4th Degree. Pike points out that if the individual has any other goals than to seek the truth and to serve others, then this is the time to stand back. The Threat is an opportunity to take stoc k. In the wider sense, outside the Lodge, a person of such ... rank and is not worthy of it.' Bearing in mind the secrets, oaths and responsibilities they incur, this warns the candidate that he had better be certain that he possesses the integrity and strength of character to live of up the role of Secret Master. The 'woe betide' may possibly be extended to the penalties, symbolic or otherwise. An individual may aspire to this level as a natural progression, and the Masonic ethos is to assist him in reaching his greatest potential. The final analysis of this warning is 'Do not try to be what you are not, nor to have ideas above your station.' The person considering himself worthy of this position must be of strong character, know his own mind, believe in his abilities and will meet the demands asked of him in the 4th Degree. Pike points out that if the individual has any other goals than to seek the truth and to serve others, then this is the time to stand back. The Threat is an opportunity to take stock. In the wider sense, outside the Lodge, a person of such character and ability can only be an asset to society. Vows of duty, fidelity and integrity are part of many ceremonies, (nuptials, Holy Orders and so forth)and when put into action, are positive attributes for any man or woman. To wish to use them to serve God, Nature and Mankind as a whole, is a noble and admirable desire, bringing benefits to he who lives by them and to those he serves. The threat links directly to the integrity demanded in the vows, for a Secret Master. The second Threat, 'Woe betide anyone who makes commitments not being able to cope 3. with' is connected closely to the duty inherent as a responsibility at this level. This duty is not just to Masonic brethren, but to all mankind, God, Nature and the Universe. To help

Sports Development Essay Example for Free

Sports Development Essay The main aim of sports development is to provide links/opportunities for young people to progress along the sports development continuum (player pathway). The continuum produces the following pyramid model: Foundation This level provides the base of the pyramid. During this stage there should be more participants learning/experiencing basic sporting skills. Examples of activities which contribute to this stage are: Primary PE lessons, Top Play activities (sports development), multi sports sessions (sports centres). The acquisition of good exercise/skill habits provides a basis for personal development and future participation in the sport of their choice. Participation This stage is when children begin to participate in specific activity on a regular basis for enjoyment purposes. Sports development contributes significantly to this stage with its community tops programme (after school coaching), school festivals, multi skills clubs and providing club/school links. Sports clubs become important at this stage as they make the link to the next stage of development. Performance During this stage young people begin to concentrate on sport specific skills and begin to develop talent in specific sports. Quality coaching is an essential part of player development at this level and the following schemes contribute to this: Organised by sports development-coaching weeks, Shropshire youth games. Other: Active sports, club activity. Excellence. The excellence stage provides the peak of the pyramid, and demonstrates the level where individuals reach sporting excellence. Obviously the pyramid narrows here as the number of players will reduce at this stage. Governing bodies of sport are responsible for development at this level as players pass from county to regional to national squads. Football Football starts with participation, Participation for exaple could be done at school in pe lessons, junior football clubs and just generally playing with family or friends. Then you have to move on to foundation. This could be like 7 aside or 11 aside games. You need to move out of the playground and into the football clubs. Foundation is a very basic understanding of the game. Then you would move onto performance. Performace is a higher level than foundation, it meens you are begining to work on specfic areas of your game and working towards sports excellence. This would meen you would play for a club and participate in games and train regulary. Excellence is what all sporting performars wish to achieve, it is the meens to have the ability to perform better than just a performace level witch sets u apart from the rest of your competetors. You no you have achieved sporting excellence when you get offerd a chance to play with your national or local clubs e. g. England u18s and leeds united u18s Participation Foundation Performance Excellence John aged 10 John aged 12 Decides he trains whith his Wants to take local under13 Part in fooball junior football So he starts club e. g. cliffton Playing with rangers. His freinds in The school yard.

Conflict Management in the Construction Industry

Conflict Management in the Construction Industry The nature of the construction industry in Hong Kong is such that there is an existing conflict between the major construction project participants, owners, design professionals and contractors. The construction industry is well-known for high levels of conflicts and disputes. Construction is construction, and no matter how complicated the technology. It is also a project-based industry with each project being unique. Within a project life cycle, a large number of separate firm are involved. Failures by one party can affect those engaged in a project and, as work often takes substantial periods during which national economic circumstances can change, it is unavoidable that dispute will arise. From the above-mentioned scenario, it should not be surprised that the techniques of conflict management and dispute resolution in construction industry are more developed, compared to the industry, one might be inclined to ask the questions as to whether there is any hope for the industry in attempting to reduce the serious and extent of conflicts and disputes? According to Fenn et al(1997), conflict can be managed, possibly to point of preventing it from leading to dispute whereas, dispute require resolution and , therefore, are associated with distinct justifiable issue. The purpose of this paper will firstly describe the definition of conflict management and dispute resolution. And also identify the causes of the conflicts and disputes in Hong Kong construction industry. Finally, this study will also identify the way of formal conflict management and the dispute resolution methods to be used. 2. Conflict Management in Construction Industry: 2.1 The definition of conflict management: Conflict may be defined as a contest between people with opposing needs, ideas, beliefs, values or goal. Conflict on team is unavoidable; however, the results of conflict are not predetermined. Conflict might increase and lead to non-productive results or conflict can be beneficially resolved and lead to quality final products. Therefore, learning to manage conflict is essential to a high-performance team. Though very few people go looking for conflict, more often than not. Conflict results because of lacking communication between people with regard to their needs, ideas, beliefs, goals, or values. Conflict management is the principle that all conflicts cannot consequentially be resolved, but learning how to manage conflicts can decrease the odds of non-productive escalation. According to Algert, N.E., and Watson, K. (2002), Conflict management involves obtaining skills related to conflict resolution, self-awareness about conflict modes, conflict communication skills, and establishing a structure for management of conflict in your environment. 2.2 The causes of conflict in construction: Construction is significantly different from manufacturing, in which the same goods are produced a thousand times. Also, construction does not allow for the change of variable while holding the rest fixed in order to study its effects. The nature of the construction referred to earlier so conflicts among owners, design professionals and contractors are general. To suggest that these parties are prone to confrontational interaction and conflict would be a major statement in the construction industry. Owners are even arguing with their design professionals over design service explain of errors and neglect in design services rendered, aesthetic considerations and budget overruns. (p.4-white) Accordingly, Howell et.al (1998, cited by Vorster 1993) proposed a nomenclature of elements that summarize four causes behind conflict in the construction environment: Incomplete scope definition: The design professionals responsibility to define and design the project scope so as to meet the owners functional, budgetary, time and environmental project criteria. When the design professional fails to meet their responsibility, the owner is almost always dissatisfied with the result, with the effect that strict correspondence soon ensues between the parties. Also, when the scope of the work is unclear, this presents an unhappy relation for future between the owner and the contractor, arguing about the scope and quality of the work, and whether in fact the work is properly defined by the contract documents prepared by the design professional. Inappropriate contract type: Contracts are endemic as causes of conflict within the construction industry; almost every stage of the construction process is regulated by an agreement of some sort. Some of the areas of contract dispute are breach of contract in contract clause interpretation, inspection of work clauses, indemnity clauses, payment of supplies, and liability to third parties, just to name a few possible areas of contract dispute. Poor communication: Infrastructures are unique products with more complex production process than other and most of building products are a combined effort of several peoples or organization. So many professionals have contribution to do a building in various capacities. Among construction team members, each may have different aim in relation to their profession, but their main aim should be to complete the project within a given plan. Conflict between team members may arise when their objectives are inconsistent. Also, their interpretations of contract documents, terms, and conditions can diverge, leading to discrepancies and conflict. In short, all causes of conflict within an area are interrelated. Uncertainty: For external: a) Environmental concerns; b) Social impacts; c) Economics; d) Political risks; e) Weather; f) Regulation; g) Unforeseen site condition. For internal: a) Error in design; b) Construction methods and workmanship In figure 10.3 which is one example of what the owner should consider when identifying potential conflicts. We can identify which of them may be realized at the interfaces among the multiple participants in an agency construction management delivery system. Certain conflicts in the relationship among the owner, designer, CM and trade contractor can be eliminated in various situations if a different delivery system is selected. (P.205-White) 2.3 Methods of conflict management used in construction industry in HK: In the construction industry, ask anyone if they completed a construction project without any conflict. The answer 100% of the time will be NO. The successful project managers must be implement strategies to avoid or monitor conflict in their construction project. The following common steps are used by the project managers when developing a successful conflict management: Conflict identification; Conflict analysis; Design and implementation of a conflict management; Monitoring and review of the conflict management. (P.202-White) Prevention is the best method in the management of the conflict in construction industry. The methods include: Dispute review boards or advisors; Negotiation; Quality (Total quality management and quality assurance); Procurement systems which are all non-blinding process. Baden-Hellard (1988) emphasized that construction industry has a built-in potential for conflict arising from the differences always present in values, principles and interest. Thus, when differences arises from unforeseen events, no matter how well the clients, design team and contractors have managed the project, better methods of resolving the differences are needed. Dispute review boards or advisors: It is virtually impossible to complete a large construction project without having any disputes develop between the parties. The DRB is a panel of two neutral individuals who are selected by the parties to the construction contract, usually the project owner and the general contractor. The project owner will stipulate in the specifications for bidding the project. DBR provide the processes and mechanisms to not only help to settle disputes but also can provide a method to prevent the potential conflict from ever happening. The potential conflict to the DRB means that plausible argument at each construction stages and the quality of the presentation of claims. The first meeting of the DRB usually takes place well before the commencement of the construction project and will continue to meet until the DRB members are well-known all of the aspects of the project. After the project begins, each DRB will usually meet on a regularly scheduled basic such as once each month or once each quarter, etc. Besides, site visit can ne made depending on the requirements of the project. Negotiation; Negotiation needs to be carrying out to resolve the conflict before it reached a more serious stage and change into dispute. The parties are required to come together and approach an agreeable settlement through communication. The following two example shown a simple negotiation between the main contractor(MC) and a subcontractor(SC) who is unable to meet the objective in the contract. Example A: SC: I will not be able to finish this process on time. MC: You must be finish theses according the time schedule. SC: I need three extra weeks to finish it. MC:You cannot have extra three weeks. SC: If I do not get three weeks, i can not complete this process on time. MC:No, you will complete as scheduled, if you really cannot finish it, we will collect damage and replace you. The example A is a position-based type of negotiation which will go around in circle until one of parties abandons its position. It is not clear why the parties are even arguing. Example B: SUB: I will not be able to finish this process on time. MC: What are the reasons and why can you not finish as scheduled? SUB: My supplier will not able to deliver the materials until next week so I need three extra weeks to finish it. MC: You should know the schedule is very tight for this project. Are there any other suppliers who can deliver on time? SUB: Yes, but the suppliers are more expensive than the damages given by finishing late. MC: Although you are responsible for reaching the target, I also understand your predicament. Actually, I know some other suppliers that might be able to solve these problems and I will contact them as soon as possible. The example B is an interest-based type of negotiation which can be reached a mutually agreeable solution even the source of the conflict is uncovered. According to these two examples, a successful negotiation should result in a solution acceptable to both parties that will not damage their relationship and implies collaboration, trust and common objectives. Quality (Total quality management (TQM) or assurance): According to Gardiner et al (1992), the most confliction stages are identified within the organization, closely followed by the issue of quality and control. One of the most confliction stages is the quality issue so a good and suitable quality management or control system should be issued. It can reduce the frequency of conflict. TQM is an extensive management system which: Focuses on meeting owners needs by providing quality services at a cost that provides value to the owners; Is compel by the quest for continuous improvement in all operations; Understand everyone in the organization; Observe an organization as an internal system with a common objective rather than as individual parties acting to maximize their own performances; Emphasize teamwork and a high level of workers. Procurement systems: The procurement system is one of most effective methods in prevention of conflict so it should be located in the earlier stage of the project life cycle. According to Bennett et al (1990), the procurement system built up the roles and relationships, which constitute the organization. It establishes the overall management structure and systems, which helps to form the overall values and styles of the project. The Procurement System for Construction provides support for: Selection of appropriate procurement and contracting strategies, and nomination of an appropriate Principal in the contracts; Preparation of tender documents and contracts based on standard forms; Selection of contractors and consultants with proven performance records; Effective management of contracts, including clause commentaries, sample letters and checklists; Maintenance of an effective performance management system through monitoring and reporting; and Resolution of contractual claims and disputes. (NSW Government (2000), Procurement system for construction. Available from: NSW Government, NSW Government Procurement Web site: http://www.nswprocurement.com.au/Procurement-System-for-Construction.aspx [Accessed: March 13, 2011].) 3. Dispute Resolution in Construction Industry: 3.1 The definition of Dispute Resolution: Dispute resolution is about identifying the root causes of conflict and preventing and managing conflict with the purpose of resolving disputes or conflict during the construction process in order to avoid post-construction claims, litigation, and related costs. According to Whitfield(1994), resolve disputation can use either informal resolution methods such as negotiation and alternative dispute resolution(ADR) or formal resolution methods such as litigation and arbitration. 3.2 The causes of dispute in construction: Disputes are often the outcome of ill considered procurement practices, inadequate preparatory planning and design activity, or poor project and commercial management procedures. If the conflict happened in construction site, all parties are agreed to each other. There is no further conflict because objectives of both party become same. But if one or both party becomes intransigent, then the conflict may turn to a dispute. In other word, disputes are come up when parties are unable to manage their conflicts properly. Dispute can be defined as a disagreement between parties in connection with their objectives. Construction failure may create dispute between the parties in construction sites. According to Feld and carper; Kaminetzky (1997), failure during the construction phase may include: Overloading. Improper temporary supports. Inadequate planning and execution of construction process. Lack of inspection. Insufficient safety factors. Inadequate training of construction workers. Feld, J. and Carper, K. (1997). ConstructionFailure. John Wiley Sons, New York.   Cause of client: 1) Failure to respond in timely manner. 2) Inadequate tracing mechanisms for RFI (Request for information). 3) Reluctant to check for constructability, clarity and completeness. 4) Discrepancies / ambiguities in contract documents. 5) Poor communications between and among the parties involved in theproject. 6) Failure to appoint an overall project manager. 7) Lowest price mentality in engagement of contractors and designers. The absence of team spirit among the participants. 8) Deficient management, supervision and coordination efforts on the  part of the project. Cause of designer: Failure to understand its responsibilities under design team contract. Over-design and underestimate the costs involve. Inadequate in open and factual communication. Late information issued and cumbersome approaches to RFIs Design and specification oversights and errors or omissions resulting  from uncoordinated civil, structural, architectural, mechanical and  electrical designs. Incompleteness of drawing and specifications. Cause of contractor: Inadequate contractor management, supervision and coordination. Lack of understanding and agreement in contract procurement. Failure to understand and correctly bid or price the works. Reluctance to seek clarification. Failure to plan and execute the changes of works. Inadequate CPM Scheduling and update requirements. Delay/ suspension of works. Fenn et al (1997) provides a synopsis of the findings of nine frequently cited  studies of the sources of disputes: 3.3 Methods of dispute resolution used in construction industry in HK: According to Carmichael (2002), the step approach to dispute resolution as below. An attempt is made to resolve the dispute at the level at which it occurs, in a reasonable time; If this fails, involve parties at a higher level with decision making authority, and the potential to settle in the interests of a commercial solution; If this fails, proceed to an ADR approach using and independent third party; If this fails, arbitration or litigation will be used. 3.3.1 Informal resolution methods: a) Negotiation: Negotiation is a common dispute resolution method, which we all are using in every day. There is no neutral third party for the negotiation, only the disputants. It is also defined as a means to reach mutual agreement through communication, according to Down, L.J. (2009), (p.140-white) Negotiation is considered by most appropriate way to resolve any dispute in construction industry. It was because negotiation is not expensive and can be maintained relationship with the related parties. However, there are also negative sides of negotiation. For example, if the related parties negotiated a long and protected period of discussion, the negotiation will be fail because they are not blinding. Besides, it is an informal resolution method, it can allow any surprise issue or irrelevant points rising. b) Alternative Dispute Resolution (ADR) ADR is a collective term used to describe methods of resolving disputes which are alternatives to litigation and arbitration and which usually offer a less expensive solution. For example: Mediation: This has appeared as an increasingly used form of dispute resolution, involving a neutral third party working to facilitate effective negotiations to enable a mutually acceptable settlement. In mediation, the parties explore options, measuring the strengths and weaknesses of their respective cases. Mediation can save a great deal of time and cost in resolving a dispute and can also help the parties to re-establish trust and prevent damage to ongoing relationships. Adjudication: This is a quick and relatively inexpensive way of resolving a dispute.The adjudicators decision is normally upheld by the courts and so it is important to ensure that all the relevant facts are put in front of the adjudicator. Adjudication does not necessarily achieve final settlement of a dispute because either of the parties has the right to have the same dispute heard afresh in court. However, experience shows that the majority of adjudication decisions are accepted by the parties as the final result. (Powell, J. David. 2005. Boundary Dispute Resolution in England Wales Surveyors and Lawyers Working Together to Resolve Problems. Proceedings of Cairo: Egypt.) Because of the following potential advantages, it is worth considering using ADR early in a lawsuit or even before you files a lawsuit. Advantages of ADR: Better communication; Continued business relationship; More options for settlement; Reduced costs in achieving settlement; Confidentially Control of outcome and the process. 3.3.2 Formal resolution methods: a) Litigation On occasions, alternative dispute resolution procedures are not successful in resolving disputes, resulting with the parties resorting to formal litigation through the courts. According to Whitfield(1994), the process of litigation is from the issue of a writ to a hearing and then on to a judgment. One of the failures of the legal process has been the speed with which solicitors have been prepared to issue writ. After writ has been issue, the plaintiff cannot simply withdraw his writ and forget the matter. If he did so, the counterclaim would be found against him along with the cost. The related construction companies need to provide litigation support services for both formal litigation and alternative dispute resolution as follows: Programme delay analysis; Forensic research; Preparation of statements of claim and statements of defence; Paralegal support. b) Arbitration According to Ashworth (2005), Arbitration is a legal technique for the resolution of dispute outside the courts. The parties refer the dispute to a neutral, knowledgeable person (arbitrator or arbitral tribunal) who then gives the final decision (award) to which both the parties agree. Arbitration, in lieu of court proceedings, as the last resort to resolving disputes in construction contracts has been commonly used in Hong Kong as well as internationally. Although intended to be a less formal and more flexible alternative to litigation, arbitration can be as thorough and time-consuming as litigation, especially for construction disputes. The related companies should be employ the expertise in representing them in arbitration proceedings and handling the whole arbitration process from the appointment of arbitrators, drafting of pleadings, dealing with interlocutory proceedings through to the hearing stage and beyond. Where necessary, lawyers who experienced in construction disputes to provide the most comprehensive services to the company in arbitration. 4. Conclusion: Each construction projects are unique and complex undertakings. A unique set of drawings and specifications are used to describe each construction stages. The drawings and related documents generally performed by a general contractor and several subcontractors, many of whom have not work together previously. The unique aspects of each project and the unique constitution of each construction team are common reasons for disagreements to occur. Disputes can be generated in any environment; indeed, conflict can occur whenever two individuals try to work together. These disputes often concern topics such as changes, differing site conditions, delays, and payments. Many researchers had attempted to determine the causes of conflict and disputes within the construction industry. Besides, H. Murray Hohns (1979) leads to the conclusion that the specific causes of the conflict and dispute can be largely traced to the following five sources: Errors, defects or omissions in contract documents; Underestimation of the cost by the client, the contractor, or both; Changes in conditions, (e.g. unforeseen ground conditions); Claims from end-users (legal rights of owners and tenants); People involved in the construction process. When confliction is arise in the construction industry, the importance of proper conflict recovery method and compliance with formal procedures cannot be over-stressed. If disputes proceedings become unavoidable, it should be some comfort to know that proper alternative dispute resolution will be a favorable condition rather than a drawback.

Comparing Polymers: Metal and Ceramics

Comparing Polymers: Metal and Ceramics Ceramics are inorganic and nonmetallic materials formed from metallic and nonmetallic elements whose interatomic bonds are either ionic or mostly ionic. Many of the ceramics desirable properties are obtained usually by a high temperature heat treatment. Ceramics are made up of two or more elements. In a crystalline structure is more complex than that of metals. When the bonding is mostly ionic the crystal structure is made up of positively charged metallic ions, cations, negatively charged nonmetallic ions and anions. When the ions are bonded together the overall charge must be neutral. To have a stable system the anions in the structure that surround a cation must be in contact with that particular ion. There needs to be a ratio of the cation radius to the anion radius for the coordination and understanding of the structures geometry. If for example there is a lack of coordination, the cation would be incorrectly incased by the anions thus causing a collapse in its expected structur al stability. There are many different types of structures exist for ceramics. One crystal structure is the AX type where there are an equal number of cations and anions. Another crystal structure that exists for ceramics has a different number of cations and anions but still has a neutral charge because the ions have different magnitudes of charge is called an AmXp structure. An AmBnXp structure has more than one type of cation, represented by A and B but only one type of anion. This type of structure is also seen in close packing of ions in metals. Imperfections occur in the crystal structure of ceramics very similar to metal structural defects. Defects can occur in each of the two ions of the structure. At any time there can be cation, anion interstitials, cation or anion vacancies. Most defects or imperfections occur in pairs to maintain the electroneutrality. A Frenkel defect is a cation vacancy and cation interstitial pair. When a cation and anion vacancy pair occurs they are called a Schottky defect. Ceramics can also have impurities in the crystal structure like metals. Figure 12.21 gives a schematic diagram of the Frenkel and a Schotkey defects (pg 435). In many cases ceramics tend to be very brittle which can lead to catastrophic failure with very few signs of fatigue. This is due to the fact that ceramics absorb very little energy before they fracture. When ceramics are subjected to a tensile stress, they almost always fracture before any plastic deformation takes place. Fracture occurs because of the formation and propagation of cracks perpendicular to the applied load. Ceramics have a greater ability to resist compression than tension. The modulus of elasticity decreases with more pores in the ceramic material. When there are many pores in the material they act as stress concentrators which expose the material to weak portion. However, ceramics are very hard and are good for applications where abrasive or grinding action is needed. Most polymers are organic and are composed of hydrocarbons with interatomic forces that are represented as covalent bonds. Most polymers chains are quite long and very complex. These long molecules are made up of repeat units which are repeated along the chain. The smaller repeating unit is called a monomer. Polymers can be made up of a single repeat unit, called a homopolymer, or two or more different repeating units called copolymers. Polymers generally have a very large molecular weight. These molecular chains tend to have many kinking, bending, and coiling along with entanglement with neighboring chains may occur. This causes the outcome material to be very elastic. Polymer chains can have side groups which cause different configurations based on which side and with what regularity they bond. They can present a level of crystallinity similar to the packing of the molecular chains to create an ordered atomic array. This crystal structure can be much more complex than metallic crystal structures. Defects in polymers also differ from those found in metals and ceramics. Defects in polymers are linked to the chain ends because they are slightly different than the chain itself and emerge from the segments of the crystal. Polymers are very sensitive to strain rate, temperature, and chemical nature of the environment. Different polymers can exhibit different stress strain behavior depending on the complexity of the mole cular chain. Certain polymers display a level of is brittle where fracture occurs before elastic deformation which is very similar in the case of ceramics. Another type of polymers is very similar to metals where elastic deformation takes place first followed by yielding and plastic deformation. A third type is exhibited by elastomers which have totally elastic and recoverable deformation. Polymers generally have a lower modulus of elasticity and tensile strength then metals. Some Polymers can be stretched up to ten times longer than its original state where metals and ceramics cannot easily accomplish. Polymers exhibit viscoelasticity at temperatures between where elastic and liquid like behaviors are prevalent. Similar to metals and ceramics, polymers can experience creep. Creep is a time dependent factor due to deformation under stress or elevated temperature. In both ceramics and polymers, creep depends on time and temperature. Polymers may be ductile or brittle depending on tem perature, strain rate, specimen geometry, and way of loading which is very similar to the properties of metals. Polymers are brittle at low temperatures and have somewhat low impact strengths. Polymers can experience fatigue under a repetitive loading. They are generally softer than metals and ceramics and unlike metals and ceramics, polymer melting occur over a range of temperatures instead at a specific temperature. Metals are a material made up of metallic elements that are bonded metallically like common alloys. The electrons are not bound to any particular atom creating a matrix of ion cores surrounded by many electrons. They are very good conductors of heat and electricity where as ceramics and polymers are lacking. Polymers and metals are both ductile and are not that brittle though metals also exhibit a level of malleability. Ceramics are very brittle, they tend to fracture under a load which means they are lacking in ductility. Polymers are the softest material due to their complex structure, while ceramics are the hardest but are not very tough because they fracture before plastic deformation occurs. Polymers plastically deform very easily and have the smallest Youngs modulus. Ceramics have the highest value because of their brittleness and never reach the point of plastic deformation because they would fracture first. The values of Youngs modulus for metals fall between those for polyme rs and ceramics. These three materials have diverse structures and exhibit different levels of defects. Alloying, using the term in the broadest sense. Simply an alloy is a metal compound that consists of 2 or more metal or nonmetallic elements. These combinations of metallic and non metallic elements ultimately create new compounds that in result display superior structural properties as compared to the elements by themselves. The type of alloy mixtures is highly dependent on the desired mechanical property of the material. Alloying can be applied to metals, ceramics and polymers where in each specific properties are desired. One of the most desired properties of metal alloys is the hardenability. A material with a high level of hardness will resist deformation caused by surface indentation or abrasion while a material with a low hardness level will deform more easily under similar conditions. The main factor in a materials hardenability is its martensite (the rate which austenitized iron carbon alloys are formed when cooled) also content and is related to the amount of carbon in a material. With this application of alloying on metals, the material can exhibit greater strain and stress resistances as well as elasticity. These properties are favorable when dealing with construction and manufacturing processes. A ceramic alloy is basically a fusion of a ceramic with of 2 or more metals. As seen in metal alloys, ceramic alloys can consist of impurity atoms in a solid state. In ceramic alloys an interstitial and substitutional states are possible. In an interstitial type, the anion has to be bigger than the impurity of the ionic radius. The substitutional impurity applies where the impurity atom usually forms a cation in the ceramic material thus the host cation will be substituted. Figure 12.23 provides a great visual representation of interstitial and substitutional types in a ceramic alloy (pg 437). Significantly, to properly achieve a solid state of solubility for substituting impurity atoms, the charge and the ionic size must be as the same as the host ion. If they were different it there would need to be some other way for the electroneutrality to be maintained within the solid. An easy way to do this is to create a formation of lattice defects of vacancies or interstitial of both ion t ypes. Cobalt chromium is a perfect example of a ceramic alloy in which was designed to be used for coronary interventions thus because it does not degrade once placed in the human body. Polymer alloys consist of two or more different types of polymers in a sense blended together. There are a variety of additives that can be blended or mixed in with the polymer to create the desired effect for the material. Polymer additives that support the modification of its physical properties are fillers, plasticizers, stabilizers and of course flame retardants. Fillers are generally introduced to a polymer, when a greater comprehensive strength and thermal stability is desired. Creating these types of alloys are very beneficial because they are generally very easy to create and use in their desired form. Plasticizers help improve the flexibility and toughness of polymers by reducing the hardness and stiffness of the material. They are often introduced to polymers that are generally brittle at room temperature. These additives are especially useful because they generally lower the glass transition temperature thus allowing the polymer to have a extent of pliability. Due to the f act that certain polymers are not resilient to environmental conditions, stabilizers are introduced. They provide stability and integrity against deterioration against the mechanical properties. The two most common forms of environmental deterioration are UV exposure and oxidation. A major concern with many polymers is that they are highly flammable. Flame retardants are introduced to such polymers to reduce the combustibility of the material by interfering with its ability to combust through a gas phase or initiating a different combustion reaction that generates less heat. This process will reduce the temperature that would eventually cease the burning process. Kirill Shkolnik 105940393 ESG 332 R01 Exam #2 (Question #2) Describe with reference to phase diagrams and dislocation theory, how precipitation age hardening can be achieved in aluminum alloys. Generally aluminum is a metal with a low level of density compared to other metals. Due to this low level of density, it conducts electricity and heat better than copper. Aluminums just over 1200 degrees Fahrenheit which is comparably low to other metals. Due to these simple facts, it seems ideal to bond elements such as titanium, silicon, copper, zinc and other materials to magnify aluminums positive attributes. The process precipitation age hardening can amplify the alloying of aluminum. This process involves supersaturating a solid solution precipitating evenly dispersed particles on the aluminum. This will help stop the movement of dislocations within the metal structure. The basic concept of dislocation is the atomic misalignment of atoms in a linear plane. These atomic misalignments affect a whole series of atoms on a plane. The series of misalign atoms form a line called a dislocation line. There are two known types of dislocation called the screw and edge dislocation. Screw d islocation and edge dislocation are the primary types of dislocations but require a certain amount of each other to occur. By reducing the amount of dislocations can radically increase the strength in the metal. The process of alloying usually makes a pure material harder. The process of alloying is having one metal bond with impurity atoms from other materials to change its mechanical properties. An alloying process called solid solution alloying uses a solution to substitute bonds inside the metal. The limiting of dislocation movement is a major factor for alloying because it can be used to strengthen metals. Alloying metals with the precipitation hardening makes the strength of the new material stronger as the progress of the process is delayed. The reason for precipitation hardening is sought after is because of its abilities in making metals stronger. Aluminum alloys can have precipitation in a very specific way. Heat treatment occurs when one material is heated a supersaturated mixture at a specific phase and so two different phases can be present together. A precipitate forms in small pieces throughout the entire material. When the mixture is at its equilibrium, the forming process comes to an end. The small pieces of precipitate then diffuse together to form one large precipitate. This stage of the precipitate tends to weaken the materials fundamental structure. The small pieces of precipitate in the material make it harder for dislocations to move. When strength of the material diminishes due to the movement of the precipitate it is called overaging. There are two things need for heat treatments to be applied. Figure 11.21 provides a graphical representation the relationship between temperature and composition for aluminum and copper (pg 402). The copper phase represented at a shows a supersaturated solid solution in aluminum while the compound that between the two elements is symbolized as ?. Interestingly the point M represents the max solubility point at certain temperature and composition in the material. Point N represents the solubility limit of a and (a + ?) L symbolizes the temperature needed for the solution to become a liquid. If a major amount of solute is made available in the solution, we would have a precipitation hardened alloy. The limit of the solubility curve vastly decreases in concentration as the temperature decreases. There are two different ways precipitation can occur. One process is the use heat treatment where the solute can be dissolved to form a solid single phase solution. This method can be done by heating an alloy to a very high temperature. Figure 11.24 shows that the ? phase is blended into a phase (pg 404). Then the alloy is cooled where all that is left is a supersaturated a phase. Precipitation heat treatment the (a + ?) phase is heated to a specific temperature to allow the ? phase to precipitate. The alloy is cooled and the hardness of the alloy is determined by time. A logarithmic function a comparison with strength and time proves the dependence of temperature and strength. Kirill Shkolnik 105940393 ESG 332 R01 Exam #2 (Question #3) Describe what is meant by the term glass transition temperature and illustrate your answer from polymer and ceramic point of view. Typically a glass transition temperature is where a noncrystalline form of a polymer or a ceramic is cooled and transforms from a super cooled liquid into a glass. A ceramic or a glassy material is a noncrystalline material that becomes increasingly more viscous when it is cooled. Due to the fact that glassy materials are noncrystalline there is no definite temperature when the liquid will transform into a solid. Though, it is also important to note that in noncrystalline materials the specific volume is dependent on temperature and will decrease with the temperature. The glass transition temperature displays a reduction in the rate at which the specific volume decreases with temperature. When the temperature is below this value, the material is in a ceramic from and directly above this point the material is considered a supercooled liquid. The glass transition temperature occurs in both glassy and semicrystalline polymers, but not in crystalline materials. As certain molecular chain s in noncrystalline materials temperature drop due to lack of motion the glass temperature transition occurs. Basically glass transition is the time in which a steady transformation occurs from the liquid state to a slightly rubbery state and then to the final more rigid solid material. The glass transition temperature is the state in which the material goes from its rubbery to rigid state. This transition can take place in both directions. As a polymer for example is cooled to a rigid solid, it can be heated and undergo the same transition in reverse. As the material undergoes all of these changes its properties change from state to state. Some materials can experience greater change include the stiffness, heat capacity, and the coefficient of thermal expansion for the material during this transition. The glass transition temperature also acts as a limit boundary for applications of polymers and polymer matrix like components. If this temperature is beyond the material threshold, it will no longer fit the desired properties the task had called for and the application would be useless. The molecules that had been frozen in place below the will both rotate and translate at the temperatures above. Molecular characteristics have an impact on the chains stiffness and will in turn affect the glass transition temperature for the material. Some molecular characteristics that can cause the chains flexibility to be reduced and the glass transition temperature to increase that include bulky side groups on the molecular chain. Also these characteristics can affect polar atoms or groups of polar atoms on the side of the molecular chain, double bonds, and aromatic groups. The glass transition temperature will also increase as the molecular weight of the material increases. Branching also influences the of a material, many branches will decrease the chains mobility and increase, a lower density of branches will cause the to decrease as the molecular chains will have a freer range of motion. Crosslinks can occur in glassy polymers and can affect, they cause the reduction of motion and therefore increase. If there are too many crosslinks occur in the material, the molecular motion would be so limited that glass transition may not occur. It can be understood that many of the same molecular characteristics which affect the glass transition temperature also affect the melting transition temperature. The two are affected in such a similar manner that is usually somewhere between 0.5 to 0.8 times the melting transition temperature. Figure 15.19 demonstrates this mathematic relationship (pg 548). Both ceramic and polymers have a glass transition temperature. A glass can be referred to by several different names; such as vitreous solid, an amorphous solid or glassy solid. An amorphous solid has the mechanical properties of a solid, but does not have long range molecular order where they are in motion at a very slow rate that it be considered rigid for regular purposes. When glas sy materials have been supercooled below the glass transition temperature they will take on characteristics similar to those of a crystalline solid. This solid will become rigid with an increased hardness and will be more brittle. However, if a glassy material is heated to above its glass transition temperature it will become softer and many of the intermolecular bonds will break allowing the material to flow at an increasing fluid viscosity. A polymer below the glass transition temperature is more rigid, but as it enters its glass transition phase, the material becomes more rubbery as its viscosity increases. The polymer can enter its glass transition at a lower temperature when critical factors that usually affect the motion of the molecules in the material are not all present. When molecular weight of a polymer increases, the glass transition temperature will also increase. Many factors that increase the the rubber gasket would not do its job properly. Polymers can exhibit the following structures: amorphous, semi-crystalline and crystalline. Describe these structures and explain how the mechanical properties may be influenced by these structural forms for a polymer of the same chemical formula. Polymers can develop amorphous, semi-crystalline and crystalline structures of the same chemical formula. Polymers can exist as liquids, semi solids, or solids related to the crystal structures respectively. However each of these structures exhibit a variety of different mechanical properties. The crystallinity of a polymer depends on the intermolecular secondary bonding which will heavily influence the extent of any mechanical property of the polymer. The tensile strength, elastic modulus and compression strength of a crystalline structure will be stronger than a semicrystalline structure and significantly stronger than amorphous type structure. For a crystalline structure the molecular chains of the polymer are tightly packed together in an organized atomic group which take up space and will affect the polymers mechanical properties. These crystalline structures are heavily influenced by the glass transition temperature. Also the isomer and chemical formula lays out crucial factors that will be very important in the formation of the bulk material structure. From certain large bulky functional groups there becomes an impending hindrance that will inhibit the movement capability of a molecule. This process will increase the energy requirement for any phase change. The outcome of this process is a greater transition temperature. This new temperature transition will increase the chances for the formation of a crystalline structure. The reason for this is and time span before the material becomes a disorganized liquid and requires a longer time for the molecules to arrange themselves properly. When polymers have many branches the weaker the material will be, even though crystalline structures are stronger than less ordered materials. Figure 15.18 demonstrates the change in these structural states when specific volume and temperature are compared (pg 546). Pure polymers have a very small melting point ranges and bond strength. Doped polymers and polymer alloys will generally have wider melting point ranges. The process of branching will decre ase the strength of a polymer, which would continuously decrease the melting point temperature. Though, the act of branching on heavily dense branches will decrease molecule mobility. Also within this process the molecular weight is affected as well. Kirill Shkolnik 105940393 ESG 332 R01 Exam #2 (Question #4) How are T-T-T and C-C-T diagrams used to design heat treatment schedules for plain carbon steels. Time-Temperature-Transformation or T-T-T and continuous cooling transformation or C-C-T are used for heat treatment schedules for plain carbon steel. T-T-T are commonly known as an isothermal transformation diagrams can show the change of different phases at certain temperatures. C-C-T can be used to calculate percent transformation against the logarithm function through time. The use the isothermal transformation and continuous cooling transformation diagrams can be used to develop a heat treatment for plain carbon steels. These diagrams will support the understanding of carbon steels through phase diagrams. When a structure is heat treated, its cooling process helps retain its structure. This process can be analyzed through T-T-T. Figure 10.13 displays a graphical representation of temperature against time with a third dimension with the percent of the steel alloy transformed to pearlite (pg 326). The understanding of a rapid cooling alloy sully depends on the understanding and application of heat treatment. It is understood that isothermal transformations do not change in temperature but continuous cooling transformation diagrams do. C-C-T and T-T-T display the same dimensions but over a larger spectrum of time and temperature. Figure 10.28 shows different forms of steel alloys (pg 338). A material that has been cooled to a temperature slightly below it s eutectoid temperature, and isothermal transformation is maintained for an extended period of time, interestingly it cannot be depicted on T-T-T diagrams in spheroid forms.

Jane Eyre: Imagery :: essays research papers

Jane Eyre: Imagery Jane Eyre tells the story of a woman progressing on the path towards acceptance. Throughout her journey, Jane comes across many obstacles. Male dominance proves to be the biggest obstacle at each stop of Jane's journey: Gateshead Hall, Lowood Institution, Thornfield Manor, Moor House, and Ferndean Manor. Through the progression of the story, Jane slowly learns how to understand and control her repression. I will be analyzing Janes stops at Thornfield Manor and Moor House for this is where she met the two most important men in her life. The easiest way to compare and contrast Rochester and St. John Rivers is by examining when and under what circumstances these two gentlemen come into contact with Jane. It is at Thornfield Manor that Jane first encounters Mr. Rochester. While living at Thornfield, Rochester demands undivided attention from the servants, Jane included. He needs to be in control of every aspect of his life, and he needs to feel superior to all of those around him. Jane de cides to accept his control and she concedes to him by calling him sir, even after they begin to have an intimate relationship. At one point, she even goes so far as to excuse herself for thinking. She says, "I was thinking, sir (you will excuse the idea; it was involuntary), I was thinking of Hercules and Samson with their charmers" (p.289). This statement possibly begins to suggests Janes unsatisfaction with Rochester's position of complete dominance in their relationship. To Jane, Rochester embodies the idea of love which she has so long been denied of. As I stated earlier, the whole movie is about Janes journey towards acceptance, by herself and by others. It is this journey which persuades her to move on when she finds Rochester's physical and material love unacceptable. Jane's next stop on her journey is Moor House. Here, she meets St. John Rivers, her cousin. Unlike Rochester, St. John is portrayed as the ultimate sacrificer, willing to do anything for others, no matter how undesirable the task might be. St. John also expects this sacrifice from Jane, and she must decide whether to accept his proposal. At this point in her journey, Jane understands that her search for herself can not be accomplished without real love. She denies St. John's marriage proposal by saying, "I have a woman's heart, but not where you are concerned; for you I only have a comrade's constancy; a fellow soldier's frankness, fidelity, fraternity. . .nothing more." (p.433). She knows real love can not be given to her by St. John and she

Jousting :: Essays Papers

Jousting Depending on who you ask, there are many different things that come to people's minds when one hears the word, chivalry. Some might say: knights, castles, horses, damsels in distress, Knights in shinning armor.... i could go on and on. I think of all these things as well, but I also think of Jousting. In a time when courage, honor and integrity were valued jousting was not only a sport, but a way for knights to prove their skill and courage. When we think of a knight in shining armor, we almost automatically think of the grand joust. It's hard not to imagine the thunderous hoof beats and the roar of the crowd as two knights race towards each other in a test of skill and nerve. The joust grew from the chaotic melee of the tournaments that were always taking place. As more and more restrictions were put on man to man combat; a tournament was developed where men rode horses and carried lances. This dangerous form of combat, was an event designed to test the horsemanship and weapons skill of the individual knight. Jousting tournaments caught on quickly because it truly tested every aspect of a chivalric man. Not only did it test the skill a knight had with weapons, but it also tested his skill with of controlling and riding a horse. In a sense, a jousting match could prove or disprove a knights ability to be a truly chivalric knight. In the joust the knight used the lance, a weapon specifically designed for mounted combat. At first jousters would simply spur their horses towards one another, weapons ready, each attempting to knock each other off there horses. If a knight was knocked to the ground, his battle was as good as lost. For the mounted warrior could run him down, trample him with his horse, or spear him with his lance; all while out of reach of the land bound fighter. When the joust came to represent the horsemanship of the fighter, safeguards evolved. The lance was fitted with a three pronged tip called a coronal, which was designed to keep the weapon from penetrating a knights helm and to re-distribute the force of the impact. Also, armor was developed specifically for the joust.

Changing Lives Essay

I have always viewed life differently. There were times when people would act differently towards me, for I acted maturely for my age. Oftentimes, I was vocal about how I wanted to finish my education so that I would be able to fulfill my dreams further. For everyone’s benefit, I would like to pursue a degree in Biology. At a young age, my mother exposed me to the real world. She was a nurse in one of the hospitals, and most of the time she would cater to the needs of patients. Like any curious child, I would ask her questions about her profession, making me more inclined into the field of medicine as I grew older. I could definitely say that my mother was my driving force in my dream of becoming a physician someday. My mother would consistently teach me about medicine and the first aid that I need, in the event that I need help. In school, I always showed my determination and perseverance to succeed in life. I would always give my best, even in the smallest requirement deemed from students. As much as possible, I wanted things to go as planned. Hard work and dedication were not the only factors that I took in mind. I was guided by my prayers and my will to be of service to others. In this manner, I wanted to make sure that everything was in proper order and that I am not stepping nor hurting anyone in the process. I remember the many times that my mother brought me to work with her. Even at a young age, she helped satisfy my curiosity by allowing me to assist in her work. In high school, my mother finally allowed me to volunteer in their hospital, especially in catering to the needs of patients. This kind of exposure made me more determined than ever to be of service to those in need as a physician. My life was never a perfect one. Although my mind was set into becoming a successful physician, there were certain things in life that led to this decision. My mother was of Mexican-American lineage; and Mexico was where she finished her education. In her attempt to bring herself to grater heights, she moved to the United States. The hardships that she endured when she was still starting were difficult to bear. However, she disregarded all of these and went on to fulfill her dream. Now, she is a nurse and earning a stable job in the United States. Like my mother, I was inspired to work hard and bridge gaps by making it big in the United States. The kind of education that the University of California would give me would come to my advantage in my attempt to attend medical school. I learned that the institution has produced numerous talents that have been successful in their chosen field, and making a difference in the lives of others. Like them, I would want to serve as an inspiration and be able to break barriers in the field of medicine. I would use the training and the knowledge that your school would give me to make further researches that could be used in the advancements and upheaval of society. I also want to inspire others from the medical field to render service from their heart, and not just because of the paycheck that may be receive. I know that the experiences that I had in life were not enough for me to be accepted in your university. Like the other students who have bore witness to the exemplary performance of this institution, I would do my best to live up to the Mission-Vision, which is summed up in making it big and helping others. As one of the students, all I can offer is my dedication and will to make a difference in society. I am one step forward in reaching my goals in life – and it starts with my acceptance at the University of California.

Investigation of Magnetic Fields by Search Coil

Physics Lab Report – C15 Title: Investigation of magnetic fields by search coil Objective: To use a search coil and a CRO to investigate the magnetic fields generated by alternating currents through a straight wire and a slinky solenoid. Apparatus: Search coil 1 |Slinky solenoid 1 | |CRO 1 |Slotted bases 2 | |Signal generator 1 |Metre rule 1 | |a. c. mmeter 1 |Crocodile clips 2 | |PVC-covered copper wire 26 s. w. g. 1 m long |Connecting leads. 2 | Theory: When there is a change of the magnetic flux ? linked with a wire loop, it induces an electromotive force (emf) ? between the loop ends, but a constant magnetic flux or a non-linked flux does not. This is the basic fact of electromagnetic induction, expressed by Faraday’s law for a wire loop, ? -d? /dt The induced emf, ? is equal to the negative rate of change of the magnetic flux ? linked with the loop. If we replace the wire loop by a short coil of N turns, the induced voltage is N times that of a single loop, so Far aday’s law becomes ? = -Nd? /dt When loop ends are connected, ? produces a current which yields its own magnetic field. Its direction always opposes the flux change d? /dt. This fact is known as Lenz’s law and is expressed by the negative sign. For a circular loop of radius r and area A = ? r2 in a constant magnetic field B (Fig. 36. ), the magnetic flux linkage ? is ? = B? A = BA cos? B? denotes the field component normal to the loop. The flux linkage is zero when loop and field are parallel. It is highest when the loop is perpendicular to the field, i. e. cos? =1, thus, ? = -NA dB/dt. The search coil is always used to measure the magnetic fields. It consists of N turns of the coil enclosing an area A. When exposed to a changing magnetic field B, an e. m. f. is induced across the ends of the coil. The induced e. m. f. (? ) is directly proportional to the rate of magnetic field, i. e. ? = -NA dB/dt . When the search coil is connected to a CRO, the corresponding induced e. m. f. and hence magnetic field magnitude can be determined. Precautions for magnetic field around straight wire 1. The wire should be long 2. The distance(r) should much smaller than the length of the wire. Procedure A. Magnetic field around straight wire 1. The circuit as shown in Fig. C15. 1 and a lateral type search coil to a CRO was connected. 2. The signal generator was turned on and was set to 0. 5A and 5kHz. 3. The centre of the search coil was placed 1 cm away from the straight wire. The search coil was at the same level and perpendicular to the straight wire. The CRO setting was adjusted to display a whole trace on its screen. 4. The time base of the CRO was switched off. The length of the vertical trace shown on the CRO was recorded, which represents the induced peak-to-peak e. m. f. (V) in the search coil and also the magnetic field around the straight wire. 5. The steps 2 to 4 were repeated with the other values of current (I) from the signal generator in steps of 0. 1A. Then, the results were tabulated. 6. A graph of the induced e. m. f. (V) against the current(I) as plotted. 7. The steps 2 to 4 were repeated with the others values of distances (r) of the search coil away from the straight wire. The results were tabulated. 8. A graph of the induced e. m. f. (V) against the reciprocal of distance([pic]) is plotted. 9. The frequency of the signal generator was varied to change the sensitivity of the search coil. B. Magnetic field around slinky solenoid 10. The circuit as shown in Fig. C15. 2 and a lateral type search coil to a CRO was connected. The stretched length of the solenoid is 1 m. 11. The signal generator was turned on and was set to 0. 5A and 5kHz. 12. The search coil was placed at the centre of the solenoid. Make sure that the search coil was perpendicular to the solenoid. The variation of induced e. m. f. was shown on the CRO. 13. Step 12 was repeated with placing the search coil at the end of the solenoid, across its cross-section and along its length. 14. The search coil was placed at the centre of the solenoid again. The time base of the CRO was switched off. The length of the vertical trace shown on the CRO was recorded, which represents the induced peak-to-peak e. m. f. (V) in the search coil and also the magnetic field around the solenoid. 15. Step 14 was repeated with the other values of currents (I) from the signal generator in steps of 0. 1A. The results were tabulated. 16. A graph of the induced e. m. f. (V) against the current (I) was plotted. 17. Step 14 was repeated with the other stretched lengths (l) of the solenoid. The space between coils must be even. The results were tabulated. 18. A graph of the induced e. m. f. (V) against the reciprocal of the stretched length of the solenoid(1/l ) was plotted. Results A. Magnetic field around straight wire |Current I/A |0 |0. 1 |0. 2 |0. |0. 4 |0. 5 | |Induced e. m. f. (V)/mV |0 |0. 5 |1 |1. 6 |2. 4 |4. 1 | [pic] |Distance (r) / cm |1 |2 |3 |4 |5 | |1/r /cm |1. 00 |0. 50 |0. 33 |0. 25 |0. 20 | |Induced e. m. f. (V)/ mV |4. 2 |3. 2 |2. 6 |2. 3 |2 | [pic] The sensitivity of the search coil can be increased by increasing the frequency. B. Magnetic field around slinky solenoid When placing the search coil at the centre of the solenoid, across its cross-section, the induced e. m. f. shown on the CRO, i. e. the length of the vertical trace is the maximum, that means the magnetic field of the straight wire is the maximum. When placing the search coil at the end of the solenoid, across its cross-section, the induced e. m. f. shown on the CRO, i. e. the length of the vertical trace is nearly half that at the centre of the solenoid, that means the magnetic field of the straight wire is nearly half that at the centre of the solenoid. When placing the search coil along the length of the solenoid, the induced e. m. f. shown on the CRO is quite uniform except near its two ends. |Current I/A |0. 01 |0. 02 |0. 03 |0. 04 |0. 05 |0. 06 | |Induced e. m. f. (V)/mV |1. 4 |2. 8 |3. 4 |4. 2 |6 |6. 6 | [pic]p Stretched length (l ) / m |1 |0. 9 |0. 8 |0. 7 |0. 6 |0. 5 |0. 4 |0. 3 | |1/l /m |1. 00 |1. 11 |1. 25 |1. 43 |1. 7 |2. 00 |2. 50 |3. 33 | |Induced e. m. f. (V)/ mV |1. 6 |1. 8 |2 |2. 2 |2. 4 |2. 8 |3 |3. 2 | |[pic] Discussion 1. From the V-I graph in step 6 (Graph A. 1), the current flowing in the straight wire is directly proportional to the induced e. m. f. (V). As the induced e. m. f. ? = -NA dB/dt, the current flowing in the straight wire increases with the magnetic field produced by the current-carrying straight wire. From the V- graph in step 8 (Graph A. 2), the distance from the straight wire is inversely proportional to the induced e. m. f. (V). As the induced e. m. . ? = -NA dB/dt, the distance from the straight wire decreases with the magnetic field produced by the current-carrying straight wire. Thus, the result agree with the equation [pic], where ? 0 is the permeability of free space. 2. From the V-I graph in step 16 (Graph B. 1), the current flowing in the slinky solenoid is directly proportional to the induced e. m. f. (V). As the induced e. m. f. ? = -NA dB/dt, the current flowing in the slinky solenoid increases with the magnetic field produced by the current-carrying solenoid. From the V- graph in step 18 (Graph B. ), its stretched length is inversely proportional to the induced e. m. f. (V). As the induced e. m. f. ? = -NA dB/dt, its stretched length decreases with the magnetic field produced by the current-carrying solenoid. Thus, the result agree with the equation [pic], where ? 0 is the permeability of free space and is the number of turns of the solenoid. 3. It is necessary to place the search coil at the same level and perpendicular to the straight wire. Otherwise, the magne tic field cannot cut the search coil completely and ideally. Then, the induced e. m. f. is not the maximum and even there is no induced e. . f. shown on the CRO. As a rollecteesult, the data cd is not accurate. 4. There are several sources of error. First, there is reading error, zero error of ammeter. Secondly, the space between coils is not even. Thirdly, the magnetic field around the straight wire and the slinky solenoid is easily disturbed by other apparatus nearby. Finally, the search coil is not at right angles to the straight wire and the solenoid, this make the data collected becomes inaccurate. To avoid disturbance, the set-up should be significantly distant from the return leads and other apparatus. The space between coils is nearly even. The search coil is nearly at right angles to the straight wire and the solenoid Therefore, the experiment can be improved. 5. Reason for the sensitivity of the search coil can be increased by increasing the frequency. First of all, the search coil detects a varying B-field through the current induced in it which is: From the deduction, we can see that with A and B0 held constant, which are the area of search coil and the peak value of the varying B-field respectively, the rate of change of magnetic flux ? ncreases with increasing ? which is the angular frequency with value 2? f, where f is the frequency of the B-field. 6. The Earth’s field can be ignored because it is a steady magnetic field. Conclusion The magnetic field around a long straight wire carrying a current is directly proportional to the current (I) and inversely proportional to the distance(r) from the wire. The magnetic field inside the solenoid carrying a current is direct ly proportional to the current (I) and the number of turns (N) but inversely proportional to the length (l ) of the solenoid.