Plan for positive influence Essay Example | Topics and Well Written Essays - 750 words

Plan for positive influence - Essay Example There are several steps to motivation. First is to identify the goals and objectives, by being as precise as possible. Then the team has to decide on why you want to accomplish this objective and envisage the end result. Subsequently, visualize the goals and objectives of the team. Then, write these objectives and vision down. Then the team needs to break these goals into baby steps. Team will have to create an action plan for the upcoming year according to goals and objectives. This plan should be checked daily, and admit the team’s achievement, and make adjustments as you go along. This will create a hopeful atmosphere. The setbacks are to be learned from and the success be celebrated. The team members take responsibility for goal accomplishment. In the end, team needs to be in control of schedule and figure the resources and the determination that will assist the team (Peterson, 2007). A huge portion of the company’s success comes from the capability of team to meet the demands of the company, and also the customers’ demands. Therefore, it is the reason that keeps the employees content and satisfied in a way to make the business flourishing. There are certain steps to improve the satisfaction of team members. First of all make sure that each member knows about the business vision and mission. Team members should know about the business, comprising of basic necessities of customer satisfaction. Then the expectations need to be cleared among all the team members (Quick, 1992). Empowerment of employees needs to be on forefront for their satisfaction. Team members do better job and are more satisfied if they know they are trusted by team leader. Empowering the team members allows for enhancing customer relations as their satisfaction increases. Empowerment helps a team member accountable for the job and also productive for team as well. It allows the team to succeed in the organization and work for benefit of the company. Team members should be rewarded on their accomplishments, this improves their satisfaction level. The satisfaction of team members can simply be boosted by saying ‘Good Job’ to them. Many different types of rewards are gift card, cash bonus, promotion or initiative, and also a title, for enhancing the working conditions for the team members (Quick, 1992). To increase the morale and satisfaction of team members, several team building activities are to take place. To build on and improve the team should be the highlight of team members. These will include inviting team members on retreat where objectives and aims are discussed and new ideas generated. Also, a team building consultant can be hired to look after the team. A good remuneration always gives satisfaction to employees. It is not usually on the top of employee satisfaction but it is also mandatory for any organization (Bledsoe, 1995). The performance of employees will be increased by a three level formula. First of all, the aim is to get the teamwork and basic job skills in one place. This is achieved by differentiating for the members of the team a team and a crew. This will assist in moving from approach of crew to approach of team and instituting common aims and objectives which will agree on process and behavior. Level two aims at the performance measures. The change is in process in

Study on Steps to Christ Essay Example for Free

Study on Steps to Christ Essay He took man’s nature, that He might reach man’s wants. The poorest and humblest were not afraid to approach Him. Such is the character of Christ as revealed in His life. This is the character of God. It was to redeem us that Jesus lived and suffered and died. He became a Man of Sorrows, that we might be made partakers of everlasting joy. But this great sacrifice was not made in order to create in the Father’s heart a love for man, not make Him willing to save. No, no! God so loved the world, that He gave His only-begotten Son. John 3:16. The Father loves us, not because of the great propitiation, but He provided the propitiation because He loves us. None but the Son of God could accomplish our redemption. What a value this places upon man! Through transgression the sons of man become subjects of Satan. Through faith in the atoning sacrifice of Christ the sons of Adam may become the sons of God. The matchless love of God for a world that did not love Him! The thought has a subduing power upon the soul and brings the mind into captivity to the will of God. Man was originally endowed with noble powers and a well-balanced mind. He was perfect in his being, and in harmony with God. His thoughts were pure, his aims holy. But through disobedience, his powers were perverted, and selfishness took the place of love. His nature became so weakened through transgression that it was impossible for him, in his own strength, to resist the power of evil. It is impossible for us, of ourselves, to escape from the pit of sin in which we are sunken. Our hearts are evil, and we cannot change them. There must be a power working from within, a new life from above, before men can be changed from sin to holiness. That power is Christ. His grace alone can quicken the lifeless faculties of the soul, and attract it to God, to holiness. To all, there is but one answer, Behold the Lamb of God, which taketh away the sin of the world (John 1:29). Let us avail ourselves of the means provided for us that we may be transformed into His likeness, and be restored to fellowship with the ministering angels, to harmony and communion with the Father and the Son. How shall a man be just with God? How shall the sinner be made righteous? It is only through Christ that we can be brought into harmony with God, with holiness; but how are we to come to Christ? Repentance includes sorrow for sin and a turning away from it. We shall not renounce sin unless we see its sinfulness; until we turn away from it in heart, there will be no real change in the life. But when the heart yields to the influence of the Spirit of God, the conscience will be quickened, and the sinner will discern something of the depth and sacredness of God’s holy law, the foundation of His government in heaven and on earth. Conviction takes hold upon the mind and heart. The prayer of David, after his fall, illustrates the nature of true sorrow for sin. His repentance was sincere and deep. There was no effort to palliate his guilt; no desire to escape the judgment threatened, inspired his prayer. David saw the enormity of his transgression; he saw the defilement of his soul; he loathed his sin. It was not for pardon only that he prayed, but for purity of heart. He longed for the joy of holiness, to be restored to harmony and communion with God. A repentance such as this, is beyond the reach of our own power to accomplish; it is obtained only from Christ. Christ is ready to set us free from sin, but He does not force the will. If we refuse, what more can He do? Study God’s Word prayerfully. As you see the enormity of sin, as you see yourself as you really are, do not give up in despair. It was sinners that Christ came to save. When Satan comes to tell you that you are a great sinner, look to your Redeemer and talk of His merits. Acknowledge your sin, but tell the enemy that Christ came into the world to save sinners and that you may be saved (1 Tim. 1:15). He that covereth his sins shall not prosper: but whoso confesseth and forsaketh them shall have mercy. Proverbs 28:13. The conditions of obtaining mercy of God are simple and just and reasonable. Confess your sins to God, who only can forgive them, and your faults to one another. Those who have not humbled their souls before God in acknowledging their guilt, have not yet fulfilled the first step of acceptance. We must be willing to humble our hearts and comply with the conditions of the Word of truth. The confession that is the outpouring of the inmost soul finds its way to the God of infinite pity. True confession is always of a specific character, and acknowledges particular sins. All confession should be definite and to the point. It is written, If we confess our sins, He is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness (1 John 1:9). God’s promise is, Ye shall seek Me, and find Me, when ye shall search for Me with all your heart. Jeremiah 29:13. The whole heart must be yielded, or the change can never be wrought in us by which we are to be restored to His likeness. The warfare against self is the greatest battle that was ever fought. The yielding of self, surrendering all to the will of God, requires a struggle; but the soul must submit to God before it can be renewed in holiness. In giving ourselves to God, we must necessarily give up all that would separate us from Him. There are those who profess to serve God, while they rely upon their own efforts to obey His law, to form a right character, and secure salvation. Their hearts are not moved by any deep sense of the love of Christ, but they seek to perform the duties of the Christian life as that which God requires of them in order to gain heaven. Such religion is worthless. When Christ dwells in the heart, the soul will be so filled with His love, with the joy of communion with Him, that it will cleave to Him; and in the contemplation of Him, self will be forgotten. Love to Christ will be the spring of action. Such do not ask for the lowest standard, but aim at perfect conformity to the will of their Redeemer. Do you feel that it is too great a sacrifice to yield all to Christ? Ask yourself the question, What has Christ given for me? The Son of God gave all—life and love and suffering—for our redemption. And can it be that we, the unworthy objects of so great love, will withhold our hearts from Him? What do we give up, when we give all? A sin-polluted heart, for Jesus to purify, to cleanse by His own blood, and to save by His matchless love. And yet men think it hard to give up all! God does not require us to give up anything that it is for our best interest to retain. In all that He does, He has the well-being of His children in view. Many are inquiring, How am I to make the surrender of myself to God? You desire to give yourself to Him, but you are weak in moral power, in slavery to doubt, and controlled by the habits of your life of sin. Your promises and resolutions are like ropes of sand. You cannot control your thoughts, your impulses, your affections. The knowledge of your broken promises and forfeited pledges weakens your confidence in your own sincerity, and causes you to feel that God cannot accept you; but you need not despair. What you need to understand is the true force of the will. This is the governing power in the nature of man, the power of decision, or of choice. Everything depends on the right action of the will. The power of choice God has given to men; it is theirs to exercise. You cannot change your heart, you cannot of yourself give to God its affections; but you can choose to serve Him. You can give Him your will; He will then work in you to will and to do according to His good pleasure. Thus your whole nature will be brought under the control of the Spirit of Christ; your affections will be centered upon Him, your thoughts will be in harmony with Him. Desires for goodness and holiness are right as far as they go; but if you stop here, they will avail nothing. Many will be lost while hoping and desiring to be Christians. They do not come to the point of yielding the will to God. They do not now choose to be Christians. Through the right exercise of the will, an entire change may be made in your life. You will have strength from above to hold you steadfast, and thus through constant surrender to God you will be enabled to live the new life, even the life of faith. As your conscience has been quickened by the Holy Spirit, you have seen something of the evil of sin, of its power, its guilt, its woe; and you look upon it with abhorrence. It is peace that you need. You have confessed your sins, and in heart put them away. You have resolved to give yourself to God. Now go to Him, and ask that He will wash away your sins and give you a new heart. Then believe that He does this because He has promised. The gift which God promises us, we must believe we do receive, and it is ours. You are a sinner. You cannot atone for your past sins; you cannot change your heart and make yourself holy. But God promises to do all this for you through Christ. You believe that promise. You confess your sins and give yourself to God. You will to serve Him. Just as surely as you do this, God will fulfill His Word to you. If you believe the promise,—God supplies the fact. Do not wait to feel that you are made whole, but say, I believe it; it is so, not because I feel it, but because God promised. —Summary of all the key points in Steps to Christ, pp. 9-51, in the author’s own words. Part Two – How Can I Remain True to God? Jesus says, What things soever ye desire, when ye pray, believe that ye receive them, and ye shall have them (Mark 11:24). There is a condition to this promise—that we pray according to the will of God. But it is the will of God to cleanse us from sin, to make us His children, and to enable us to live a holy life. So we may ask for these blessings, and believe that we receive them, and thank God that we have received them. Henceforth you are not your own; you are bought with a price. Through this simple act of believing God, the Holy Spirit has begotten a new life in your heart. You are a child born into the family of God, and He loves you as He loves His Son. Now that you have given yourself to Jesus, do not draw back, do not take yourself away from Him, but day by day say, I am Christ’s; I have given myself to Him; and ask Him to give you His Spirit and keep you by His grace. As it is by giving yourself to God, and believing Him, that you become His child, so you are to live in Him. Here is where thousands fail; they do not believe that Jesus pardons them personally, individually. They do not take God at His Word. It is the privilege of all who comply with the conditions to know for themselves that pardon is freely extended for every sin. Put away the suspicion that God’s promises are not meant for you. They are for every repentant transgressor. Look up, you that are doubting and trembling; for Jesus lives to make intercession for us. Thank God for the gift of His dear Son. If any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new. 2 Corinthians 5:17. A person may not be able to tell the exact time or place, or trace all the chain of circumstances in the process of conversion; but this does not prove him to be unconverted. A change will be seen in the character, the habits, the pursuits. The contrast will be clear and decided between what they have been and what they have become. Who has the heart? With whom are our thoughts? Of whom do we love to converse? Who has our warmest affections and our best energies? If we are Christ’s, our thoughts are with Him. There is no evidence of genuine repentance unless it works reformation. The loveliness of the character of Christ will be seen in His followers. It was His delight to do the will of God. There are two errors against which the children of God especially need to guard: The first is that of looking to their own works, trusting to anything they can do, to bring themselves into harmony with God. All that man can do without Christ is polluted with selfishness and sin. It is the grace of Christ alone, through faith, which can make us holy. The opposite and no less dangerous error is that belief in Christ releases men from keeping the law of God; that since by faith alone we become partakers of the grace of Christ, our works have nothing to do with our redemption. Obedience is the fruit of faith. Righteousness is defined by the standard of God’s holy law, as expressed in the ten commandments (Exo. 20:3-20). That so-called faith in Christ, which professes to release men from the obligation of obedience to God, is not faith, but presumption. The condition of eternal life is now just what it always has been,—just what it was in paradise before the fall of our first parents,—perfect obedience to the law of God, perfect righteousness. If eternal life were granted on any condition short of this, then the happiness of the whole universe would be imperiled. The way would be open for sin, with all its train of woe and misery, to be immortalized. Christ changes the heart. He abides in your heart by faith. You are to maintain this connection with Christ by faith and the continual surrender of your will to Him; and so long as you do this, He will work in you to will and to do according to His good pleasure. The closer you come to Jesus, the more faulty you will appear in your own eyes; for your vision will be clearer. This is evidence that Satan’s delusions are losing their power. No deep-seated love for Jesus can dwell in the heart that does not realize its own sinfulness. The soul that is transformed by the grace of Christ will admire His character. A view of our sinfulness drives us to Him who can pardon; and when the soul, realizing its helplessness, reaches out after Christ, He will reveal Himself in power. The more our sense of need drives us to Him and to the Word of God, the more exalted views we shall have of His character, and the more fully we shall reflect His image. The change of heart by which we become children of God is in the Bible spoken of as birth. Again it is compared to the germination of the good seed sown by the husbandman. It is God who brings the bud to bloom and the flower to fruit. It is by His power that the seed develops. As the flower turns to the sun, that the bright beams may aid in perfecting its beauty and symmetry, so should we turn to the Sun of Righteousness, that heaven’s light may shine upon us, that our character may be developed into the likeness of Christ. Do you ask, How am I to abide in Christ? In the same way as you received Him at first. As ye have therefore received Christ Jesus the Lord, so walk in Him. Colossians 2:6. By faith you became Christ’s, and by faith you are to grow up in Him—by giving and taking. You are to give all,—your heart, your will, your service,—give yourself to Him to obey all His requirements; and you must take all—Christ, the fullness of all blessing, to abide in your heart, to be your strength, your righteousness, your everlasting helper—to give you power to obey. Consecrate yourself to God in the morning; make this your very first work. Let your prayer be, Take me, O Lord, as wholly Thine. I lay all my plans at Thy feet. Use me today in Thy service. Abide with me, and let all my work be wrought in Thee. This is a daily matter. Each morning consecrate yourself to God for that day. Surrender all your plans to Him, to be carried out or given up as His providence shall indicate. Thus day by day you may be giving your life into the hands of God, and thus your life will be molded more and more after the life of Christ. A life in Christ is a life of restfulness. There may be no ecstasy of feeling, but there should be an abiding, peaceful trust. When the mind dwells upon self, it is turned away from Christ, the source of strength and life. Hence, it is Satan’s constant effort to keep the attention diverted from the Saviour and thus prevent the union and communion of the soul with Christ. When Christ took human nature upon Him, He bound humanity to Himself by a tie of love that can never be broken by any power save the choice of man himself. Satan will constantly present allurements to induce us to break this tie—to choose to separate ourselves from Christ. But let us keep our eyes fixed upon Christ, and He will preserve us. Looking unto Jesus, we are safe. Nothing can pluck us out of His hand. All that Christ was to the disciples, He desires to be to His children today. Jesus prayed for us, and He asked that we might be one with Him, even as He is one with the Father. What a union is this! Thus, loving Him and abiding in Him, we shall grow up into Him in all things, which is the head, even Christ (Ephesians 4:15). God is the source of life and light and joy to the universe. Wherever the life of God is in the hearts of men, it will flow out to others in love and blessing. Our Saviour’s joy was in the uplifting and redemption of fallen men. For this He counted not His life dear to Himself, but endured the cross, despising the shame. When the love of Christ is enshrined in the heart, like sweet fragrance it cannot be hidden. Love to Jesus will be manifested in a desire to work as He worked for the blessing and uplifting of humanity. It will lead to love, tenderness, and sympathy toward all the creatures of our heavenly Father’s care. Those who are the partakers of the grace of Christ will be ready to make any sacrifice, that others for whom He died may share the heavenly gift. They will do all they can to make the world better for their stay in it. This spirit is the sure outgrowth of a soul truly converted. No sooner does one come to Christ than there is born in his heart a desire to make known to others what a precious friend he has found in Jesus. If we have tasted and seen that the Lord is good, we shall have something to tell. We shall seek to present to others the attractions of Christ and the unseen realities of the world to come. There will be an intensity of desire to follow in the path that Jesus trod. And the effort to bless others will react in blessings upon ourselves. Those who thus become participants in labors of love are brought nearest to their Creator. The spirit of unselfish labor for others gives depth, stability, and Christlike loveliness to the character, and brings peace and happiness to its possessor. Strength comes by exercise. We need not go to heathen lands, or even leave the narrow circle of the home, if it is there that our duty lies, in order to work for Christ. With a loving spirit we may perform life’s humblest duties unto the Lord (Col. 3:23). If the love of God is in the heart, it will be manifested in the life. You are not to wait for great occasions or to expect extraordinary abilities before you go to work for God. The humblest and poorest of the disciples of Jesus can be a blessing to others. Many are the ways in which God is seeking to make Himself known to us and bring us into communion with Him. If we will but listen, Nature speaks to our senses without ceasing. God’s created works will teach us precious lessons of obedience and trust. No tears are shed that God does not notice. There is no smile that He does not mark. If we would but fully believe this, all undue anxieties would be dismissed. Our lives would not be so filled with disappointment as now; for everything, whether great or small, would be left in the hands of God. God speaks to us through His providential works and through the influence of His Spirit upon the heart. God speaks to us in His Word. Here we have in clearer lines the revelation of His character, of His dealings with men, and the great work of redemption. Fill the whole heart with the words of God. They are the living water, quenching your burning thirst. They are the living bread from heaven. The theme of redemption is one that the angels desire to look into; it will be the science and the song of the redeemed throughout the ceaseless ages of eternity. Is it not worthy of careful thought and study now? As we meditate upon the Saviour, there will be a hungering and thirsting of soul to become like Him whom we adore. The Bible was written for the common people. The great truths necessary for salvation are made as clear as noonday. There is nothing more calculated to strengthen the intellect than the study of the Scriptures. But there is little benefit derived from a hasty reading of the Bible. One passage studied, until its significance is clear to the mind and its relation to the plan of salvation is evident, is of more value than the perusal of many chapters with no definite purpose in view and no positive instruction gained. Keep your Bible with you. As you have opportunity, read it; fix the texts in your memory. We cannot obtain wisdom without earnest attention and prayerful study. Never should the Bible be studied without prayer. Before opening its pages, we should ask for the enlightenment of the Holy Spirit, and it will be given. Angels from the world of light will be with those who in humility of heart seek for divine guidance. How must God esteem the human race, since He gave His Son to die for them and appoints His Holy Spirit to be man’s teacher and continual guide! Through nature and revelation, through His providence, and by the influence of His Spirit, God speaks to us. But these are not enough; we need also to pour out our hearts to Him. In order to commune with God, we must have something to say to Him concerning our actual life. Prayer is the opening of the heart to God as to a friend. Not that it is necessary in order to make known to God what we are, but in order to enable us to receive Him. Prayer does not bring God down to us, but brings us up to Him. Our heavenly Father waits to bestow upon us the fullness of His blessing. What a wonder it is that we pray so little! God is ready and willing to hear the sincere prayer of the humblest of His children. What can the angels of heaven think of poor helpless human beings, who are subject to temptation, when God’s heart of infinite love yearns toward them, ready to give them more than they can ask or think, and yet they pray so little and have so little faith? The darkness of the evil one encloses those who neglect to pray. The whispered temptations of the enemy entice them to sin; and it is all because they do not make use of prayer. Yet prayer is the key in the hand of faith to unlock heaven’s storehouse, where are treasured the boundless resources of Omnipotence. There are certain conditions upon which we may expect that God will hear and answer our prayers: One is that we feel our need of help from Him. If we regard iniquity in our hearts, if we cling to any known sin, the Lord will not hear us; but the prayer of the penitent, contrite soul is always accepted. When all known wrongs are righted, we may believe that God will answer our petitions. Another element of prevailing prayer is faith. When our prayers seem not to be answered, we are to cling to the promise; for the time of answering will surely come, and we shall receive the blessing we need most. But to claim that prayer will always be answered in the very way and for the particular thing that we desire, is presumption. When we come to God in prayer, we should have a spirit of love and forgiveness in our own hearts. Perseverance in prayer has been made a condition of receiving. We must pray always if we would grow in faith and experience. We should pray in the family circle, and above all we must not neglect secret prayer, for this is the life of the soul. Family or public prayer alone is not sufficient. Secret prayer is to be heard only by the prayer-hearing God. There is no time or place in which it is inappropriate to offer up a petition to God. In the crowds of the street, in the midst of a business engagement, we may send up a petition to God and plead for divine guidance. Let the soul be drawn out and upward, that God may grant us a breath of the heavenly atmosphere. We may keep so near to God that in every unexpected trial our thoughts will turn to Him as naturally as the flower turns to the sun. Keep your wants, your joys, your sorrows, your cares, and your fears before God. You cannot burden Him; you cannot weary Him. He is not indifferent to the wants of His children. We sustain a loss when we neglect the privilege of associating together to strengthen and encourage one another in the service of God. If Christians would associate together, speaking to each other of the love of God and the precious truths of redemption, their own hearts would be refreshed and they would refresh one another. We must gather about the cross. Christ and Him crucified should be the theme of contemplation, of conversation, and of our most joyful emotion. We should keep in our thoughts every blessing we receive from God, and when we realize His great love we should be willing to trust everything to the hand that was ailed to the cross for us. The soul may ascend nearer heaven on the wings of praise. As we express our gratitude, we are approximating to the worship of the heavenly hosts. Many are at times troubled with the suggestions of skepticism. God never asks us to believe, without giving sufficient evidence upon which to base our faith. Disguise it as they may, the re al cause of doubt and skepticism, in most cases, is the love of sin. We must have a sincere desire to know the truth and a willingness of heart to obey it.

economic Essay -- essays research papers

Globalisation - Economic Growth and Development and development indicators. â€Å"Outline the differences between economic growth and economic development. Discuss how economic development may be measured. Outline how globalisation may impact upon a nation’s development. Where appropriate make reference to a relevant case study.† Although economic growth and development are similar in meaning, they have some essential differences. Economic growth refers to the increasing ability of a nation to produce more goods and services. Economic development basically implies that individuals of that nation will be better off and takes into account changes in economic and social structures that will reduce or eliminate poverty. Economic development can be measured in a number of different ways including the Human Development Index, a Gender Empowerment Measure, a Human Poverty Index and a Human Freedom Index. All of these measures were developed by the United Nations Development Program. The World Bank also has its own indicator called the World Bank Development Indicator. Globalisation can have both negative affects on a nation. It can impact on the levels of economic growth a country may experience, impact on levels of unemployment or it may impact on a country’s quality of life. Economic growth is the expansion of a country’s productive capacity. This leads to a rise in total national output. Growth can occur in two different ways; the increased use of land, labour, capital and entrepreneurial resources by using better technology or management techniques and increased productivity of existing resource use through rising labour and capital productivity. While theoretically having an increasing national output means greater material welfare and a rise in living standards, it does not equate to having higher levels of well being for individuals in that nation. Economic growth can, in fact, have negative impacts on a nation including environmental degradation and the loss of traditional cultural values. It also may mean there is greater inequality between different classes in society, that is, the gap between the rich and the poor may grow. It is for these reasons that economic development measurements are also used. Economic growth as a measure fails to account for other important social and economic factors such as the size of the black market, domestic work ... ...e strong progress. Although in the very early nineties Poland experienced a sharp decline in GDP, it has since resumed steady growth. In 1999 its GDP growth was 4.1%. The private sector now accounts for over 55% of the total GDP. In early 1990, Poland was experiencing hyper-inflation with levels of up to 1200%. In 1999 the inflation rate was lowered to 7.3%, which although is still high by developed world standards, is slowly dropping. Also in the early nineties, Poland had huge unemployment rates with most sectors at around 30%. This has now been lowered to 13%, which again is high by developed nations’ standards but is a lot less than the rates experienced early in the decade. Essentially, the difference between economic growth and economic development is that one is a quantitative measure (growth) and the other is a qualitative measure (development). Economic development can be measured using a variety of indicators, mostly developed by the United Nations Development Program (UNDP), though another widely used indicator was developed by the World Bank. Globalisation can have many affects on nations, depending on their government policies and also on their economic status.

Evaluating The Breeze As Educational Tool In E-Learning

In the best-seller books, Rich Dad Poor Dad, Robert T. Kiyosaki and his co-author Susan L. Lechter highlights the needs for growing assets instead of liabilities. In other words, they suggest that we, anyone who wants to be rich, should not spend our money in any way that is no relation with assets creation. In this manner, they regard knowledge, obtained through formal or non-formal education, as the most important element of success in today’s fast changing world.Regarding the idea, we witness that educators continue finding the right proportion of syllabus that fit the needs of current and future workplaces.This is essential to meet current workplace demands that require employees that are knowledgeable, capable of handling and distribute information, and have expertise in technology (Goldstein, 2003). The situation highlights that employees need to be skillful in operating high technology equipments and also other tools that help them to communicate effectively with their colleagues. Concerning the issue, this paper will discuss about the evaluation of Macromedia Breeze as education tools in E-Learning. 2. Aims and Objectives a.This paper intends to discuss about the importance of using of technology as education tools b. By employing non-participant observation method, collecting data and analyzing qualitative information from a wide range of sources including journals, books, magazines and online materials, this paper aims at discussing the benefits of using Macromedia Breeze as education tools that support the implementation of e-learning. c. In addition, the paper also intends to describe about factors that encourage technology integration for education systems3. Problem Statement Education becomes key success factors that help a person to master the required knowledge in order to enable him performing their jobs effectively. The education itself can be learned when he is at school or during his duty in a company through several internal or exter nal training sessions. Concerning the education system and the use of technology, therefore the research statement or question is â€Å"Does Macromedia Breeze provide greater benefits for people in carrying out rapid e-learning (REL) in a company? †I choose this research question since it might be completely different from others that may focus only on general use of technology in a company. Therefore, instead of elaborating partial discussion on the issue, I decide to discuss the comprehensive discussion on branding in order to favor readers in understanding the technical benefits that Macromedia Breeze offers to users in performing rapid e-learning (REL) method. For this reason, in the literature review, I employ several sources ranging from academic journals, magazines, online news and books that relate to the use of technology as education tools.4. Literature Review Information Technology as Educational Tools The above condition strengthens the importance of current educa tion system to understand the needs of current and future workplaces in order to customize their syllabus so that they meet the needs of employers. Moreover, the authors also stress the importance of workforces to master information and communication technologies so that they can employ appropriate and hence effective methods in completing any tasks.We must remember that our society has experienced many changes. People or firms who succeed are those who can meet the demands required by each workplace. Once we were in agricultural society then moved into industrial society through industrial revolution in 19th century and now we live in information society marked by the advancement in telecommunications and computer technology that enable the transfer of information at the speed of light.Concerning the situation, Carly Fiorina, former CEO of HP, says only people and firms having pile of information can take benefits of the future market. Therefore, Fiorina implies the urge of becomin g learning organization in which information exchange exists in a company and the benefits of using information technology can be encouraged in the education institutions. Given the importance of information processing in the commerce, it is not surprising that business of any types was among the earliest adopters of automated information processing technology.For this reason, they need labor that have expertise in using and operating computers in commerce or trade so that they can handle sophisticated tasks like storing and retrieving large amounts of information and at making calculations and designs at highest accuracy. Historically, the convergence of digital technologies including television, telephony, and computers has stimulated the reach of the innovations of the Internet that grew from inter-university computer networks in United States.Under such circumstance, it is common to hope that current education systems should address in their syllabus about current and future emp loyment needs. Macromedia Breeze and E-Learning The use of technology especially software has influenced the way employees performing their jobs. There are many applications or software that sold in the market with various variant or version. For example, in word processing tool, customers are already accustomed to using famous application such as Microsoft Word, Word Perfect, and Open Office (for open source platform).Meanwhile, for creating slides for presentations, they are used to using Microsoft PowerPoint. In addition to the famous Microsoft PowerPoint, currently, there are many other software applications that show the powerful of presentation especially ones that support the electronic learning or e-learning. Historically, the emerging rapid e-learning has become a hot issue in workplace since it provides many benefits for employees. The situation encourages 85% of Fortune 500 companies to adopt e-learning immediately.Moreover, 80% of the respondents in the survey reveal tha t the adoption of rapid e-learning concept can give the significant contribution to their companies (Archibald, 2005). The key benefits of using Macromedia Breeze is it reduces the costs for traditional e-learning solutions that usually costs customers about US$10,000 and $50,000 per hour. According to Philip Kotler (2000), the marketing mix consisting of four important factors; they are Product, Promotion, Price and Place is a crucial aspect of forming a marketing program.In addition, by using rapid e-learning method, customers enable to have training material that has critical development timelines and alters or content updated frequently, to name a few (Archibald, 2005). Currently, in the market, there are many tools that help customers to perform rapid e-learning (REL) schemes; they include Lersus, Articulate, SNAP! Studio, Webex, and mindflash. Macromedia Breeze, Content Point, and Macromedia Breeze. Technically, Macromedia Breeze uses PowerPoint as its main development tool.Ho wever, Macromedia Breeze adds several features including the easiness of adding an audio track to the training material. Other features of Macromedia Breeze are the capability of conducting assessment and tracking tools and they are AICC- and SCORM-compliant (Archibald, 2005). Encouraging Technology Integration at Education Systems Considering the importance of technology integration at education systems, some scholars reveal three factors that characterize the tendencies to integrate technology within education systems as following:a) First, the society realized the importance of introducing computers and other technology in formal education (schools). The trend of considering computers and their allied components as a necessity in school programs is considerable stronger, starting from the 1980’s (Milton, 2005). b) Second, there is a strong rationale within the education institution to replace the traditional programs with modern technology education. A National survey by C hinies, Oaks and Boutique (2002) indicated that school based technological literacy was one of the greatest factors that empowered any advancing economy in the world.c) Third, there is a strong support from teachers and school administrators, who became loyal contributors of efforts in designing technology programs and supporting the use of computers in all aspects of schooling (Hache, 1996) 5. Methodological and Ethical Issues The paper will employ qualitative approach, which is a research that is carried out through observations. The benefit of employing qualitative approach is it enables a researcher to investigate in little more detail on the individual perceptions of a phenomenon. However, since the research deals with the personal, therefore, such an investigation is limited in its scope.Moreover, observation becomes an important technique for collecting data concerning what occurs in a real-life situation. This method also helps us to reach an understanding about the percepti ons of those who are being studied, in that situation. To be specific, we employ non-participant observation method especially by analyzing qualitative information from journals, books, magazines and many more. The most interesting part of conducting observation is it provides researchers with an understanding about the perceptions about things or people we observe.However, since observation deals with someone’s perception, we plan to avoid preconceptions since it would provide this research with some bias. In order to comprehensive explanation, this paper will describe the use of information technology especially software applications for education purposes. In this situation, I will employ various sources including websites that discuss the use of software applications for education purposes. 6. Time Schedule In preparing the research proposal, below is the detail schedule of finalization for my research.

Investigating the Factors Affecting Tensile Strength of Human Hair Essay

Hypothesis There will be a difference in tensile strength in blonde hair and black hair of similar thickness. Blonde hair will have a higher tensile strength than black hair when at similar thickness. Blonde hair has more sulphur-sulphur covalent bonds than black hair. Hair contains the protein keratin, which contains a large proportion of cysteine with S-S bonds. The disulphide bond is one of the strongest bonds known anywhere in nature. The cross-linking by disulphide linkages between the keratin chains accounts for much of the strength of hair. Blonde hair has more of these bonds therefore blonde hair will have a higher tensile strength and elasticity levels. Null Hypothesis There will be no difference in tensile strength between black hair and blonde hair of similar thickness. Blonde hair having more sulphide bridges will not mean that blonde hair has a higher tensile strength than black hair. Background Knowledge Hair has a very high tensile strength. It can hold up 60kg of weight before breaking. This high strength is due to its structure. Hair is made of the fibrous protein keratin. Figure 1 shows keratin molecules are made up of three helices. They are held together by strong covalent bonds called sulphur bonds. Eleven of these molecules group together to form a micro fibril. Then, hundreds of micro fibrils join together to form a single hair. Hair is made of cells called epithelial cells which are arranged in three layers. The inner most layer is the medulla, the middle layer is the cortex and the out layer is the cuticle. The medulla is mainly soft keratin and the cortex and cuticle are mainly hard keratin. This structure has great strength. The cuticle, the outermost layer, is where you find a lot of the protein keratin. The cortex is the thickest middle layer, providing strength and defining colour of hair. The cortex also gives the hair its elasticity and flexibility. The medulla, central core, gives hair its strength and breadth. The structure of keratin is maintained by numerous sulphur to sulphur covalent bonds. Keratin contains high concentrations of the amino acid cysteine. Every Cystine unit contains two cysteine amino acids in different chains which have come to lie near to each other and are linked together by two Sulphur atoms, forming a very strong chemical bond known as a disulphide bridge. Many disulphide bonds form down the length of the keratin chains, joining them together like the rungs of a ladder. The disulphide bond is one of the strongest bonds known anywhere in nature. This cross-linking by disulphide linkages between the keratin chains accounts for much of the strength of hair. A suitable amount of Sulphur Bridge is important in enhancing the elasticity of hair due to the strength of the disulphide bond. Within each hair bonds of a different kind, called hydrogen bonds also link the keratin chains. There are far more hydrogen bonds than disulphide linkages. The hydrogen bonds are much weaker than the disulphide linkages and more easily broken, and give hair its flexibility. Hydrogen bonds are broken apart when the hair is wetted, and form again when the hair dries. Hair used for the investigation must not be ‘damaged’ in any way, i.e; should not be dyed/coloured, permed, straightened, etc. The hair also must not be curly. I will be only looking at naturally straight hair for this investigation. Permed and dyed hair cause severe damage to hair by reducing and breaking disulphide bonds between protein amino acids (which keep the hair strong) and they change the chemistry of hair by altering the protein rich internal structure of the fibre. In perming, a mild reducing agent is used to break the sulphur bonds. The helices are unwound and the hair is styled. A gentle oxidising agent (usually hydrogen peroxide) is treated to the hair to make the sulphur bonds reform. This results in a ‘permanent wave’. (Figure 3 shows the breaking and reforming of sulphur-sulphur bridges can produce permanent changes in the shape of protein molecules). Permed hair has only 90% of the original disulphide bonds, which leaves hair weaker than before it was permed. Heat (like from hair straighteners) disrupts the structural bonds (particularly weak Hydrogen bonds) enough to give hairs wounded around a roller some temporary curly aspect. However, this effect can be easily abolished by an increase in humidity or contact with water. Longer lasting permanents use chemicals such as thioglycolic acid to disrupt the disulphide bonds. Hairs to be tested with should not have their disulphide bonds damaged/broken or our hypothesis will become invalid even before the investigation takes place. Variables To Control†¦(keep the same) To investigate†¦(measuring/changing) Hair MUST NOT be: Tensile Strength (masses applied on hair) co loured/dyed Thickness of hair/colour of hair straightened (by applying heat) permed (by applying heat) curly (naturally) from the same person Hair MUST be: black or blonde straight (naturally) from the same age group Equipment 2 X Clamp stand – to hold everything upright 2 X Clamp – to hold paperclip/hair and ruler 100cm ruler – to measure how far hair stretches before it breaks (tensile strength) 2 X paperclip – to hold hair and mass 10kg masses with holder – to put tension on hair Selotape – to hold loop of hair in paperclip 15 pieces of black hair – to compare 15 pieces of blonde hair – to compare Micrometer – to measure hair thickness Method 1. I will first take five pieces of hair randomly from six different people. Three of these people should have black hair and three should have blonde hair. My total numbers of hair should be fifteen black and fifteen blonde. Hair samples should be taken from six different people to make sure that a fair and accurate test takes place. For example if all fifteen black hairs were taken from the same person, it could just mean that that person had thicker hair than normal thickness of black hair. This would make my results invalid. I will take all hairs from the same age group (my age group, 17-18), to erase the ‘age of hair follicle’ variable when comparing its tensile strength. 2. I will set up the micrometer to measure each hair thickness by placing hair under lens and measuring its thickness using a shown scale. I will record each thickness in an appropriate table. 3. I will place a black hair and a blonde hair of similar thickness side by side. This will be done to compare tensile strength of hairs of similar thickness. 4. Equipment will be set up as shown in Figure 5, (below) to start investigation. The hair will be carefully put in. The meter rule should be touching the bottom of the clamp stand with 0cm at the top and 100cm at the bottom. I need to make sure the hair can not slip out of the paperclip from the bottom or the top. Everything must be secure. The length of the loop of hair formed should be similar as with all hairs being tested. The weight should not be added until the rest of the equipment has been set up accurately. 5. Once the hair is set up in with the equipment, I will measure how far down the hair is on the meter rule. (Look at Figure 4, for assistance). I will record this reading in a table similar to Table 1. 6. A mass of 10kg will be placed on the paperclip at the bottom only after first measurements have been taken. 7. I will add the masses slowly so when the hair breaks I have a better view of the length of the hair. 8. When I see the hair break I will record its maximum length in my table and the weight in kg applied on hair at that point, when it reached its maximum elasticity. 9. I will repeat this whole process for all the blonde hairs and the black hairs. I will do the hairs of similar thickness after one another. For example; a blonde hair of thickness x would be measured first than a black hair of thickness x would be measured. There will be six people in my group including me. Each person will test five hairs each. Hair B1 B1 B2 B2 B B B B no. length bfr W app length bfr breaking length stretched bfr breaking max W app bfr breaking (cm) (cm) (cm) 2 minus 1 (kg) 1 2 Statistical Test I will use the t-test because I am looking for a difference of tensile strength in black and blonde hair. I will be using actual measurements (e.g. weights), and will have a large data set (30 pairs of data). I am comparing two sets of data. Investigating the factors affecting tensile strength of human hair Implementing: (Skill B) Modifications * Four different colours of hair need to be used; to increase range of results and to make my conclusion more reliable. Ginger, Blonde, Black and Brown hairs will be used. * 30 strands of hair will be used for each colour. 5 hairs from 6 people for each colour will be taken. * An eyepiece graticule will be used to measure hair thickness. Similar thickness of hairs will be compared. * Girls’ hair will be used. There are two reasons for this: a) Girls have longer hair b) Hormones may affect hair strength. Girls and boys may have different hormones. * There should be a 10cm (100 mm) gap between each paperclip. (Figure 5). * A 10g weight must be used each time. * I will need to modify my Hypothesis and Null Hypothesis because instead of comparing just two colours of hair I am now comparing four different colours of hair. Hypothesis There will be a difference in tensile strength between brown, blond, ginger and black hairs of similar thickness. Blonde hair (lighter coloured hairs) has more sulphur-sulphur covalent bonds than black hair (dark coloured hairs). Hair contains the protein keratin, which contains a large proportion of cysteine with S-S bonds. The disulphide bond is one of the strongest bonds known anywhere in nature. The cross-linking by disulphide linkages between the keratin chains accounts for much of the strength of hair. Lighter coloured hair has more of these bonds therefore lighter coloured hair will have a higher tensile strength and elasticity levels. Null Hypothesis There will be no difference in tensile strength between brown, blonde, ginger and black hair of similar thickness. Lighter coloured hairs having more sulphide bridges will not mean that lighter coloured hairs have a higher tensile strength then dark coloured hair. * Now that I am not comparing just two sets of data I can no longer do the T-Test. I am comparing four sets of data. My data will be categorical. There is a simple statistical test which looks at the difference between observed and expected values and relates them to a probability level, thus making it possible to identify how likely it is that the values are significantly different. This test is called the Chi squared test. Precautions to ensure reliability * We are assuming ethnic background does not affect our results. It will not cause a massive variation in our conclusion. * All hair samples must be taken from 16-18 year old females. * 6 different samples must be taken for each colour of hair. * Make sure all equipment is set up; ensuring the strand of hair is fastened to the shown equipment correctly. (Figure 5). * Each hair is tested five times, so I am repeating the experiment, to make my results reliable and more accurate. Results (My own (raw data) results will be highlighted in dark red on tables 2, 3, 4 & 5). (The letter ‘B’ is used in my results to show where the hair broke). Investigating the factors affecting tensile strength of human hair Analysing: (Skill C) Calculations Strength is determined by the amount of stress a hair can withstand without breaking. To work out the strength of each hair I calculated the stress applied to each when breaking. To do all the calculations I used the following formulas: 1. Force (N) = Mass (g) X 0.001 X 9.8 E.g. 10 x 0.001 x 9.8 = Force (N) Force = 0.098N 2. Cross Sectional Area (à ¯Ã‚ ¿Ã‚ ½m2) = ?r2 E.g. 3.14 x 26 x 26 = Cross Sectional Area (à ¯Ã‚ ¿Ã‚ ½m2) Cross Sectional Area = 2122.64à ¯Ã‚ ¿Ã‚ ½m2 3. Stress (Nm-2) = Force (N) / (Cross Sectional Area (à ¯Ã‚ ¿Ã‚ ½m2)/1000000) E.g. 0.098 / (2122.64/1000000) = Stress Stress = 46.16892172 (Nm-2) 4. Strain = Extension (mm) / Original Length (mm) E.g. 32 / 100 = Strain Strain = 0.32 The tables on pages 14 to 36 show how I calculated my values to do the statistical test. Discussion Melanin molecules are proteins, which are produced at the root of each hair. The more melanin in your hair, the darker it will get. An amino acid called tyrosine is converted into melanin so the hair will have colour. First, the body’s blood vessels carry tyrosine to the bottom of each hair follicle. Then, in this ‘melanin factory’ tyrosine is used as the raw material for the production of the natural melanin that is the colour in hair. In short, natural hair colour depends upon the presence, amount and distribution of melanin, a natural pigment found in the cortex. All natural hair colours are created from two types of melanin. Eumelanin = black pigment Pheomelanin = red/yellow pigment Mixed melanin’s = when both eumelanin and pheomelanin mix together inside one melanin granule. The natural colour of the hair is decided by: a) What type of melanin is in the hair b) How much melanin is in the hair c) How closely packed or scattered the melanin is within the cortex. The type of melanin and the size of the granules determine whether hair will be brown, blonde, ginger or black. The amount of melanin and its distribution determine how dark or light the hair colour will be. Black hair is created from granules full of eumelanin densely packed in the hair’s cortex. Brown hair, depending on its cool or warm tones and its darkness or lightness, is created either from granules filled with eumelanin and more sparsely distributed along the cortex than those of black hair, or granules filled with a blend of mixed melanin’s. The red/yellow pheomelanin is believed to cause the warm, golden, or auburn tones found in most brown hair. Blonde hair has a very low melanin content. And while scientists have not yet determined which is dominant, it is believed that eumelanin creates blonde hair. Melanin in blonde hair is so sparse that what we actually see is the colour of the hair fibre itself, keratin, which is a pale yellow, off-white shade. Granules filled with pheomelanin create Ginger hair. The pheomelanin in ginger hair is less densely packed in its granules. Its shape is somewhat more irregular than its black counterpart, eumelanin. It is slightly rounder and more spread out. From my results I found out that brown hair needed the greatest amount of force to break. Blonde hair needed the least amount of force to break. Black hair was second strongest and ginger hair was third strongest. The order of strength (from my results) of hair is as follows: Brown, Black, Ginger, and then Blonde. Brown hair stretched the most before breaking. Blonde hair stretched the least before breaking. Black hair stretched the second furthest and ginger hair stretched the third furthest. The order of length of hair stretched (from my results) before breaking is as follows: Brown, Black, Ginger, and then Blonde. Brown hair experienced the highest strain before breaking and blonde hair experienced the lowest strain before breaking. The order of strain experienced by hair (from my results) before breaking is as follows: Brown, Black, Ginger, and then Blonde. Brown hair experienced the highest tensile stress value before breaking and blonde experienced the lowest tensile stress value before breaking. The order of tensile stress experienced by hair (from my results) before breaking is as follows: Brown, Ginger, Black, and then Blonde. Graph 1 shows the average force required to break the four colours of hair. From this graph I can see that brown hair required the greatest force to break. Black hair also required a large amount of force to break and so did ginger hair. Black hair only required a small amount of more force to break then ginger hair. The breaking force required for brown, black and ginger hair was quite similar. Blonde hair required much less force to break compared to the other colours of hair. This proves that the disulphide bonds in the blonde hair are not a big advantage for strength of the hair. The darker the hair the stronger the force required for the bonds in the hair to break. The darker the hair the more resistant it is to breaking when forces are applied. The darker the hair the higher concentrations of melanin present along the hair cortex. The same sort of pattern is seen in graphs 2, 3, 4 and 5. Graphs 2, 3, 4 and 5 show the extension of hair when masses are added. Blonde hair breaks the earliest and brown hair breaks the latest. Graph 2 shows brown hair. Brown hair requires about 120g to extend up to about 70mm before breaking. The graph follows a basic trend and there are no anomalous results. All results fit the line of best fit. Graph 3 shows blonde hair. Blonde hair requires about 80g to extend up to about 35mm before breaking. The graph follows the basic trend and most results fit the line of best fit. There is one anomaly, though. The extension should not increase and then decrease. It should keep on decreasing. There must have been an error in recording this result. The results in graphs 2, 3, 4 and 5 are all averages. To work out the blonde values in table 32, the results in tables 12, 13, 14, 15, 16 and 17 were used. There was only one value for the extension at 80g, in table 15. This value was smaller than the average of all the extensions in all six tables. This sample of hair should have broken at 80g not 90g. This did not happen. This may have been an error in not measuring correctly. Graph 4 shows ginger hair. Ginger hair requires about 100g to extend up to about 60mm before breaking. The graph follows the basic trend until it gets to 55g point. From this point onwards the hair length increases and decreases dramatically. This should not happen. The reason why this happens is described above with the blonde hair. It is an error in measuring. Graph 5 shows black hair. Black hair requires about 140g to extend up to about 65mm before breaking. This graph is perfect. There are no anomalies. All points meet the line of best fit accurately. Graph 6 shows the average stresses and strains experienced by each hair colour. All four hair colours are plotted on the same graph so they can be easily compared against each other. Brown, blonde and ginger hairs do not follow the normal trend. The stresses and strains for these three should continue to increase. Tables 57, 58, 59 and 60 show where the stress and strain values came form. The results are like this because when the stress and strain values were calculated the average extensions were used, which had a few faults, as describe above. Graphs 7, 8, 9 and 10 show clearly what is happening to the stress-strain curves. Graph 7 shows one anomalous result. It has a high stress and strain value. Graph 8 also shows only one anomalous result. These two graphs show the basic trend. Graph 9 shows the normal trend until the stress value gets to 150Nm-2. Then it decreases and goes back on itself. This should not happen. The reason for this is explained above. There is an error in the extension averages. Graph 10 shows no anomalies. Graphs 11, 12, 13 and 14 show modified values for stress and strain in all colours of hair. Graph 11 shows the modified stresses and strains for brown hair. This graph does not bend backwards and the stress and strain values do not decrease. Graph 12 shows the modified stresses and strains for blonde hair. This graph does not show values of stress and strain decreasing. Graph 13 shows the modified stresses and strains for ginger hair. This graph has changed a lot. It reads much clearer. Stress and strain increases throughout. This is exactly what the graph should look like. Graph 14 is the same as graph 10. It did not need any modifications. The toughness of a hair is measured of its resistance to break. A lot of energy is required to break a tough material. Finally, the strength of a material (or ‘tensile strength’) is the greatest tensile stress it can undergo before breaking. Hair is an elastic material; it can stretch to a certain maximum point (elastic point) before breaking. The largest tensile stress that can be applied to a material before it breaks is known as its ultimate tensile stress (UTS). This value is sometimes referred to as the materials breaking stress. Graph 7 shows the stress-strain points for brown hair. Graph 11 shows a modified version of this. The UTS for brown hair is 359.03. Graph 8 shows stress-strain points for blonde hair. Graph 12 shows a modified version of this. The UTS for blonde hair is 125.48. Graph 9 shows the stress-strain for ginger hair. Graph 13 shows a modified version of this. The UTS for ginger hair is 286.58. Graph 10 shows the stress-strain points for black hair. Graph 14 shows a modified version of this. The UTS for black hair is 158.31. Overall I can see that brown hair was the strongest. This was not expected. I expected black hair to have the highest tensile strength, as it had a higher density of melanin along the cortex. Blonde hair turned out to be the one with the lowest tensile stress. Ginger haired people have a high density of the pheomelanin pigments in their hair fibre. Those who produce virtually no eumelanin have a red to orange colour depending on the density of the pigment in the hair fibre. Red haired people who have a greater relative proportion of eumelanin production have a deeper red to red brown colour. Ginger hair also should have a high tensile strength. This is what I saw in my results. Black hair should also have a high tensile strength. My results showed black hair to have high tensile strength but not the highest. There are other ways in which hair tensile strength could have been measured. Hair products like shampoos have an effect on hair tensile strength. They are now designed to change hair strengths. Different makes of hair shampoos could be used. Strength could be measured in a similar way to how I measured it. A control will be also be needed, with hair with no products added. These modifications in Graphs 11, 12, 13 and 14 show what the stress strain graphs should look like. In Graphs 7, 8, 9 and 10 the lines should not bend backwards. Statistical Test I will be using the (Chi squared test) X2. The formula for the Chi squared test is as follows: X2 = ? [(O – E) 2 /E] O = Observed value E = Expected value The ((O – E) 2) part of the formula considers the size of the difference between the observed and expected values. This difference could be either positive or negative. To avoid the mathematical problems associated with negative values, the difference is squared. The (E) part of the formula relates the size of the difference to the magnitude of the numbers involved. The sigma (?) ‘sum’ symbol is required because there is not just one pair of observed and expected values, but several (in this case four). By taking all the observed values of stress from tables 57, 58, 59 and 60, I can work out the expected value for each hair colour. I can then place these values in a table and work out the value for X2, using the chi squared formula. E = ( OBrown + OBlonde + OGinger + OBlack ) / 4 E = ( 297.3 + 121.5 + 246.7 + 158.3 ) / 4 E = 205.95 Brown Blonde Ginger Black O 297.3 121.5 246.7 158.3 E 205.95 205.95 205.95 205.95 ( O – E ) 91.35 -84.45 40.75 -47.65 ( O – E ) 2 8345 7132 1661 2271 (( O – E ) 2) / E 40.519 34.629 8.063 11.025 X2 = 40.519 + 34.629 + 8.063 + 11.025 X2 = 94.235 To calculate the degrees of freedom to be used can be found as follows: * Number of categories minus 1. In this case: 4 – 1 = 3 The critical value (taken from critical values for the Chi squared test) at 3 degrees of freedom is 7.81 (at the 5% level). The test statistic (X2 = 94.235) is greater than the critical value (C.V = 7.81, at the 5% significance level). We therefore can reject the null hypothesis and state there is a significant difference between the observed a Investigating the factors affecting tensile strength of human hair Evaluating: (Skill D) Limitations * The selotape holding hairs in the paperclip at the top and at the bottom could have interfered with the tertiary structure of the protein, keratin. This could have increased or decreased the bond attractions in the hair to cause the hair to have a high or low tensile stress. This would make my results unreliable. The hairs showing higher tensile stress may just be showing how sticky the selotape is and how strongly it is holding the hair structure together. This though, would affect all my results, as all hair samples had selotape on them to hold them together at the top and at the bottom. So, this limitation would affect all hairs making it a very weak limitation. My conclusion will not be affected as this limitation affects all hairs. * The time in between weights were added is another limitation. When each weight was added the hair stretched. But when there were a lot of weights on hair, the hair stretched quickly and then the length was measured. After I finished measuring the hair had slowly stretched a little bit more. So the measurement was wrong. When the next weight was added extra extension was added onto the new extension. My results were affected by this because some extensions were false making some data imprecise. Therefore, my conclusion will be invalid, because some hair samples could have broken at lower weights if I had waited for the hair to stretch, very slowly until it broke. There needed to be a time limit in which I had to record the extension of the hair, before adding the next weight to the hair. * The eye piece graticule can be a limiting factor. Different people measured hair thickness and recorded it to what they felt the thickness ought to be according to the scale. It was not very clear to see how thick the hair was, as the hair was faded under the microscope at all magnifications and the outline was difficult to see. This could affect my results as the thickness of hairs was used to calculate the cross sectional area of the hairs, which was then used to calculate the tensile stress experienced by the hair. This could make my tensile stress values incorrect. My conclusion therefore could be affected; by making out that a certain coloured hair had a higher tensile stress than another coloured hair, when really it shouldn’t have. This would make my conclusion unreliable. * There were different shades of hair colour, for example, there were light brown hair colours and dark brown hair colours. It was sometimes hard to distinguish between brown and blonde. This was the same for blonde hair. This would have an affect on the reliability and precision of my results making the accuracy of the strengths of different colours of colours of hair inaccurate. There should have been a certain shade of colour of hair (same amount of melanin in each brown hair) used for each colour sample. My conclusion will be imprecise because brown or blonde hair shades could cause incorrect results and make my conclusion incorrect. * The 10g mass is a limitation as the hair could break at lower masses than they actually did, for example a hair that broke at 50g could have broken at 41g, but I wouldn’t know that as I only used 10g masses. So, I got false readings implying the hair is stronger than it actually is. If smaller masses were used my results would be much more accurate to make my conclusion reliable. This limitation could cause my conclusion to be invalid, causing the hairs strength and point on breaking higher or lower than it actually is. Conclusion After doing my statistical test I can reject my null hypothesis and accept my hypothesis and say that brown, blonde, ginger and black hairs differ in tensile strength. I have proved this difference in my calculations, mainly in graphs 1 and 6. From my results I can see that darker coloured has a higher tensile stress compared to lighter coloured hairs. In my hypothesis I said that lighter coloured hair would have a higher tensile strength than darker coloured hair, due to lighter coloured hair having sulphur-sulphide bonds, which are very strong. I have disproved this. Through testing all four colours of hair I can see that these strong sulphur bonds do not reflect any tensile strength qualities. Lighter coloured hair does not have an advantage over dark coloured hair when it comes to tensile strength. It mainly depends on the type of melanin the hair contains. The denser the melanin quantity is the stronger the hair.