The Effect of Heat and Growth on the Survival of Bacteria free essay sample

Aims The purpose of the two experiments was to determine the fundamental effects that temperature has on the growth and survival of bacteria. During the first experiment five different bacterial broth cultures of Escherichia coli, Pseudomonas fluorescens, Enterococcus faecalis, Bacillus subtilis and Bacillus stearothermophilus were individually incubated at temperatures of 5, 25, 37, 45 and 55Â °C for one week in an aim to distinguish the effect temperature has on growth and survival of the five different species. After one week they were observed for distinguishable changes by the turbidity showing an indication of bacterial growth, or the clarity an indication of no survival. The second part of the experiment was to examine the effect temperature had on the survival ability of the five bacteria mentioned above. One of the five bacterial species were allocated per work bench for individuals to create broth culture with and expose to temperatures of 40, 60, 80 and 100Â °C for 2, 5, 30 and 90 minutes.

How to Write a Research Essay in Mathematics

How to Write a Research Essay in Mathematics Mathematics is a method and language of cognition of the surrounding world. Mathematics is an exact science that does not tolerate arbitrariness in interpretation and various speculations. This is the embodiment of order and rigid logic. It helps to understand the world around us, to learn more about its laws, since these laws are subject to the same order that prevails in mathematics. One way to understand universal mathematical laws is to write a study on this subject. In this article, we will explain how to do this and what mistakes to avoid. What Skills Can Be Developed When Writing a Research in Mathematics Studying mathematics, students: Develop a mathematical style of thinking, the ability to generalize, the ability to analyze; Learn to find patterns; Form the ability to think and reason logically, formulate thoughts correctly and clearly, draw correct logical conclusions; Acquire the ability to quickly think and make decisions; Form the skills of planning ahead, the ability to keep several consecutive steps in mind; Develop skills of conceptual and abstract thinking, the ability to consistently and logically build complex concepts or operations and keep them in mind. Main Stages of Mathematics Research Essay Writing Basically, every math project writing is carried out according to the four following stages: 1.Preparation. Defining the theme and goals of the project. 2.Planning. Identification of sources of information; Determination of methods for collecting and analyzing information; Determining how results are presented; Establishment of procedures and criteria for evaluating results and the process; 3.Research. Information gathering, solution of intermediate tasks. Basic tools to use are: Interview, Polls Observations, Experiments, Work with additional literature. 4.Results and (or) conclusions. Let’s find out in detail what should you do on each stage of your paper writing in order to make it well-researched, structured and logical. From Where to Start Choosing the Topic In order to begin research, you need to find a problem that you can investigate and that you would like to solve. This problem will tell you how to formulate a research topic. The ability to see the problem is sometimes valued higher than the ability to solve it. The main task of any researcher is to find something unusual in the ordinary, to see the difficulties and contradictions in those things where for others everything seems habitual, clear and simple. The easiest way to develop the ability to see problems is to learn to look at the same objects from different points of view. What Could Be the Topic of Research in Mathematics? Experimental these are topics that involve conducting your own observations and experiments; Theoretical these are topics on the study and synthesis of information, facts, materials contained in various theoretical sources: books, scientific articles, etc. Justification of the Relevance of the Research Problem The crucial stage in the preparation of the study is the stage of justifying the relevance of the topic. To substantiate the relevance means to explain the necessity of this topic in the context of the general process of scientific knowledge. Justifying the relevance of the chosen topic, you should indicate why this particular mathematical problem is currently relevant. The relevance may consist of the need to obtain new data and the need to test new methods, etc. Justifying the relevance, it is necessary to briefly highlight the practical reasons and difficulties for which the study of this topic has become necessary. How to Develop a Hypothesis for a Mathematical Project Once the mathematical problem is found and justified, the researcher can begin to develop a hypothesis. Translated from the ancient Greek language, the hypothesis means the basis, the assumption, the judgment about the natural connection of phenomena The hypothesis must satisfy a number of requirements: Be verifiable; Contain an assumption; Be logically consistent; Fit the facts. The hypothesis is formulated as a complex sentence: ‘if , then ’. Such a formulation should direct the attention of the student to the disclosure of the essence of the phenomenon, the establishment of cause-effect relationships. In the course of the experiment (or using another scientific method), the hypothesis is refined, supplemented, developed or rejected. How to Find Relevant Sources for Math Research Before finding the list of references online, follow this algorithm of actions: Find out the academic standards for your work. Teachers have more serious requirements for a number of works, for example, only articles published in scientific journals during the current year. Your professor can also specifically identify which sources you need to use in your mathematical research. Learn about the reputation of the author. In any field of knowledge, there are such names, whose glory is unshakable. References to the works of such titans will not allow doubts to penetrate into the heads of listeners, and they will help you to gain a certain authority. This does not mean that the names of lesser-known figures should be ignored. Even if their views are fundamentally different from the fundamental statements of thinkers, you can safely use them. The main thing here is not the lack of reputation, but the absence of the author’s bad reputation. Today it is not difficult to find scandals on the Internet in which certain authors or scientists were involved. Plagiarism always pops up at the wrong time, leaving unfortunate explorers with not the most pleasant glory. Beware of information online. Such sources are in the public domain, regardless of their professionalism and level of skill. More credible is the information from the websites of government agencies, research centers, and international scientific journals. Here you need to pay attention to the reputation of a company that owns the site. Skip articles that were published at the expense of the author, not the publisher. If the publisher did not want to spend money on the release of one or another author, it is unlikely that his opinion has any weight in the scientific community. Use the sources that can be your main assistants in the work on a scientific paper. You can safely use the lists of sources found in peer-reviewed or scientific articles. They were written by experts with extensive experience and knowledge in a particular area. Such works are created in order to convey certain information to the community. As a rule, the authors of such articles are highly qualified specialists who can be safely trusted. And the reviews are not only written by such professional authors but also repeatedly checked by experienced experts on the subject of the article. Check out alternative views. If you have doubts, you can always ask your professor about the credibility of the source of interest. As a rule, teachers are fairly well informed about the degree of confidence in a particular author. In this case, you should always find out an alternative opinion before the end of the work. What and How to Write in the Practical Part of Your Math Research The specific content of the main part of your work depends on the type of mathematical research, which can be: Empirical based on the processing and interpretation of materials of experimental or applied research, conducted by a student to confirm the hypothesis proposed in the introduction; Theoretical based on evaluative analysis of information contained in scientific sources, which serves as the foundation for the presentation of their own, original, and possibly disagreeing with the generally accepted point of view of the author’s views on the problem under consideration; Combined combining the first two approaches to research and clearly structured into two parts: theoretical and practical, in which information obtained from scientific sources is confirmed by the student’s personal empirical research; Empirical Mathematical Research This type may include computational-graphic works or case studies, which imply, for example, the development of a physical model or the solution of a specific mathematical problem. Theoretical Mathematical Research If your task is to do theoretical and analytical research, then the started research is developed in the main part. In this case, the main part of the work is the in-depth continuation of the problem analysis based on the theoretical framework tools (the methods listed in the introduction). This can be a comparison and detailed consideration of the views of different scientists and authors in order to substantiate their own point of view, which will be demonstrated in the conclusions. Combined Mathematical Research You should start the main part of this study by listing the tasks indicated in the introduction. Then propose ways to solve them and describe the results of the application development. As a confirmation of the effectiveness of the methods, data of experiments, observations, as well as illustrations and help on implementation are systematized using tables, graphs, diagrams. Project Mathematical Work Usually, such works are written by future engineers, technologists, in order to suggest ways to improve the subject of research or to develop an independent project from scratch. In this case, the main share of the main part of the work consists of drawings, formulas, calculations, dependency graphs, and the like. How to Combine All the Power of Words with Math Symbols Of course, mathematical research is impossible without mathematical calculations. However, the main task of the student is not only to make the correct calculations, use the necessary formula or approach, but also to be able to explain his choice with words. Therefore, when you write a study in mathematics, you must explain each of your actions logically, using mathematical terms, and do so in such a way that the reader cannot make a double interpretation of your words. Explain each point from the new line and make sure that your paper is convenient to read and perceive. It is not recommended to use arrows when you move from one step to another, just write about your intentions with the help of the words. Top Mistakes to Avoid Writing Your Math Essay To better understand the basics of the correct approach to writing math research, we consider the most common mistakes of students who lead them to a dead-end and do not allow them to test their hypothesis in the right way and get the correct result. First, many students begin research, forgetting generally accepted rules, definitions, or formulas. Study the material on the topic completely before you start writing the work. Often, students know the rules and formulas, but simply do not understand them. You should not just study the material, you should penetrate into it and realize the purpose of applying the received information. It happens that a student perfectly knows all the material and understands it, but for a specific task, he chooses a completely different formula or a wrong research method. Try a few easier tasks to learn how to choose the right formulas and methods. One of the most common mistakes is neglecting a careful study of the conditions of the problem. As many experienced teachers say, half of the solution to the problem is already inherent in it, and this is absolutely true. The correct understanding of the condition gives the correct direction of thoughts when testing a hypothesis. A very annoying but common problem for many students is constant computational errors. Professional teachers say that many talented students simply do not pay attention to elementary calculations, as a result of which they come to the wrong answer. A common mistake in solving geometric problems is the neglect of the properties of geometric shapes. Often such problems are based on these properties, so this is the first thing you should pay attention to. When students perform certain actions using formulas, one must remember the properties of mathematical operations. This material is taught in primary school, but often students, being passionate about the study itself, forget about it. Conclusion Of course, math research writing cannot be easy because you face two tasks at the same time to calculate correctly and to write properly. Be sure to follow the right scientific methods and use up-to-date sources, and this will facilitate achieving your goal several times.

The executive branch of state government Essay Example | Topics and Well Written Essays - 2500 words

The executive branch of state government - Essay Example The public elects the president to serve a term of four years after which he can be reappointed to power again, (Brannen & Baker, 2005). The presidential position term is renewable once through reappointment. The executive ensures that the national laws implemented and enforced, (Ferguson, 2006). This is done in order to ensure that the daily responsibilities of the federal government are carried out smoothly. These responsibilities include collecting of taxes, representing the political and the economic interests of United States to the world and safeguarding the affair of the nation within its borders. The president enacts and implements the legislative laws. The president also bargains contracts, and he heads the armed forces and the state. Legislature   The congress also labeled as the legislature comprises of the senate and the members of the house. The senate comprises of two legislators from all the states and the assembly involves the two houses. Similarly, the senate consi sts of about one hundred senate members, each state with two representatives, and the public appoints the senate members from their states. They serve for the period of six years after which can be reelected for another six-year term. The nation’s assistant president heads the congress, (Gershman, 2008). However, he is not expected to vote unless in a special case like when a tie between two powers occurs. The senate also has the duty of approving the presidential nomination to the cabinet as well as other related posts.... The senate should rectify the contracts made by the government by approximately two-thirds approval votes. The representative body consists of state representatives from various regions. The population they represent from their respective states determines these representatives. Presently, there are about 436 house members. The increasingly populated states give more representatives to the legislature that the scarcely populated states. The representatives are appointed by the public to rule for a term of two years, and the representatives appoints the speaker of the house. The crucial role of the legislative department is to make state laws, by first drafting the law and later discussing it, (Hall & McGuire, 2005). The congress votes whereby by if the law is voted in by at least two thirds, is adopted as law for the nation upon approval by the president. The judiciary The judiciary entails the Central Court of the US (that head the judiciary) and minor national courts, (Garcia, 2003 ). The difficult cases from the legislative department are taken to the judiciary for hearing. The body rules whether a case is legal from the constitution or not. The president chose such justices and the senate approves them. The power of the Supreme Court is final and thus cannot be challenged by any court. Theories Collective action This theory explains how people can cooperate to over social dilemmas they face. Collective action hypothesis suggests that people have the power to discern cooperation values and social rules. This is a shift from the normal capacity of a human being, in which he exhibits self- interest and short-term benefits. This extends the accomplishment of the collective action. However, the solidarity attitude can be eliminated if

Service Marketing- managing supply and demand Essay

Service Marketing- managing supply and demand - Essay Example Differences between supply and demand occur because services cannot be inventoried, thereby giving it the unique characteristic of ‘perishability’. This is particularly found in sectors such as banking, healthcare, retail and hospitality sectors where the service manager is at a loss trying to balance the supply and demand issues. This is despite the fact that profitability is enhanced if the managers can balance the supply and demand issues (Klassen & Rohleder, 2001). However, with certain changes in the strategy, the supply and demand issues can be managed to some extent. While the different services sector attempt to enhance customer satisfaction levels, they are unable to schedule the services due to the uncertainty of demand. Klassen and Rohleder (2001) find that uncertainty of demand patterns and the inability to make precise demand forecasts have been responsible for the challenge and the struggle that services have been facing in managing capacity and demand. Unc ertainty and fluctuation of demand can be traced to culture and habit. In the banking sector demand changes every five minutes and the off-peak periods could last up to an hour. In the retail sector also demand is marked by uncertainty as the shoppers are not logical in their shopping habits. Services are intangible, perishable, heterogeneous, and inseparable (Gronroos, 1998; Ladhari, 2009).The term â€Å"service† denotes a sense of interpersonal attentiveness which contributes to customer satisfaction (Johns, 1998). However ‘fluctuating service demand’ is the greatest challenge facing the service managers. The challenge is intensified as the demand and the capacity occur simultaneously. Customers have to be served when they want the service and service cannot be inventoried. This is what creates the challenge. The challenge occurs more in capacity-constrained service organizations that face fluctuations in demand. Organizations cannot keep the productive capacit y high when the demand is low. One solution to overcome the challenges of wasting productive capacity is to tailor the capacity as per past experience to meet demand variations (Lovelock). For instance, in the hotel sector, some labor can be on contract basis that can be hired during the peak seasons and laid off during the low seasons. They can even rent out service equipments during low season to make up for low demand. In the service sector it is not possible to schedule customers. When the demand for the hotel rooms does not increase in proportion to the enhanced supply, the revenue per room derived by the hotel is low. The profitability of a company depends upon their ability to extract maximum possible revenue from a fixed quantity of goods and services. This is also known as Yield Management (YM). This allows the hotels and even the airlines to set prices based on the demand. Airlines such as Ryanair, South West Airlines and EasyJet have been proactive and adopted YM (Gothess on & Riman, 2004). This enabled them to maximize capacity utilization. While the new entrants in the airline sector adopted this approach, the established players in the sector initially were reluctant to change their policy. Over time, the older airlines too had to take this approach seriously and bring about changes. Thus flexibility in the pricing can help reduce capacity wastage and encourage maximize capacity utilization. Revenue Management (RM) and YM are interchangeably used. The airlines started using this technique to increase yield by allocating

Government Legislation Essay Example for Free

Government Legislation Essay There are certain laws that companies must follow in order to stay in business. Legislation means simply law. There are 3 main laws that businesses need to follow, these are: 1. Health and Safety (1974) This is probably the most important bit of legislation that was passed relevant to a business. If a business does not coincide with the law about health, then potentially the customers could fall ill, or possibly die, leaving the company in ruins. Everything has to be put into it to maintain a high standard of hygiene etc Health also has to be maintained with the workers. 2. Discrimination Tahir Hussains example of discrimination is a very good one. He was unemployed and was well qualified. Hed applied for numerous jobs, but was not getting any offers for an interview. He was quite upset by this and so decided to test the system. He sent in two application forms to every business he originally sent applications in for, one with his own name, and the other one saying that it was from a white middle aged lady. What he found out was that the white lady received far more offers of an interview than he did. He launched 12 claims of race discrimination and won 4 of them, and partly won 5 more. 3. Employment Employees working under a contract of employment are protected against unfair dismissal.

Truth and Order in Ionescos Bald Soprano Essay -- Bald Soprano Essays

Truth and Order in Ionesco's Bald Soprano      Ã‚  Ã‚   Any sense of order, of sense itself, is shattered and constantly questioned by Eugene Ionesco in his play "The Bald Soprano". A serious challenge is made against an absolute notion of truth. Characters throughout the play, however, continue to struggle to maintain and share a unified and orderly existence. Empiricism is espoused by several characters. They submit that life experience is all that is necessary to establish unshakable order and thus, truth. Mrs. Smith states, "Truth is never found in books, only in life" (29). While this empirical debate underscores the need for an unmediated knowledge of truth, Ionesco simultaneously undermines empiricism as a viable method of attaining it. On a basic level, order diminishes, deteriorates, and virtually disintegrates as the play proceeds.      Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Empiricism is essentially deductive in nature; a logical premise is established from direct sensory experience. This method calls into question even the most commonplace assumptions. Nothing is accepted as given without sufficient proof. In this manner ordinary events like tying one's shoe or reading the newspaper in the subway are made to seem extraordinary. Each otherwise mundane experience contains a new vitality. Mr. Martin exclaims, "One sees things even more extraordinary every day, when one walks around" (22). The characters seem to lack a certain sense of familiarity (or boredom, perhaps) with such mundane events. Each experience, regardless of size or scope, force the characters to constantly remain in the process of reevaluating and refining the most basic assumptions upon which their lives are based. Mrs. Smith's incessant externalized inner monologue at the open... ...le isolated statements cease to be intelligible. Ionesco's language late in the play is a language of non sequitirs and nonsense. Far from articulating a unified notion of truth, language unleashes the capacity to express a cacophony of voices and viewpoints. Unequivocal statements of any sort become virtually impossible because the power to negate them is embedded in the fabric of language itself. Ironically, as the play reaches its seemingly chaotic crescendo, Ionesco himself seems to submit to some vaguely cyclical notion of order. The dialogue of the players disintegrates and then reintegrates into a single sentence, thus allowing the play to begin again with new faces, but undoubtedly the same dramatic dà ©nouement.    Works Cited Ionesco, Eugene. "The Bald Soprano." Four Plays by Eugene Ionesco. Trans. Donald M. Allen. New York: Grove Weidenfeld, 1958.

Alexander II and Reform

Alexander II was known as a reforming czar. Was he primarily a reformer? Alexander II executed many reforms during his time in power but did he reform for the sake of reforming? In the essay I will conclude whether or not Alexander had objectives in which reforming only partook as a secondary effect, and if so, what â€Å"was† he primarily? From a political point of view the landlords most likely opposed the peasant liberation reform in 1861 (Berghorn, 2009) which affected the Russian countryside. The landlords felt that they were being robbed of their property, the serfs. These were awarded full citizenship. (Lovett, 2003) This might have made Alexander II less willing to reform. However many of the serfs couldn’t leave the land they previously were bound to and so their freedom only existed legally as many remained, bound, to their landlords. (Lovett, 2003) This was as such a good solution to Alexander II as it inspired faith in some peasants that reforms were coming whilst sending a message to the landlords that their authority wasn’t threatened. From a military point of view Alexander had seen Russia take heavy casualties in the Crimean war and as he feared Europe’s more militarily advanced countries gaining influence he started in 1857 to execute the army and naval reforms. (Troyat, 1992) (Lovett, 2003) This should therefore have been a very appealing option to Alexander II as he could claim the reforms in his own name and at the same time preserve his power. From an economic point of view the Russian Empire was outdated. In order for Russia under Alexander II to play an important role as an economic power they had to industrialize. (http://en.wikipedia.org/wiki/History_of_Russia) The emancipation reform could certainly have been an attempt to as well as pleasing the serfs demanding freedom trigger a movement of urbanization and increased factory production. In that sense the emancipation reform could have served yet another cause of trying to westernize and making it seem like Alexander was a man trying to please his people. From an ideological point of view the theses of Alexander reforming secondarily is supported by the fact of some peasants and middle-class citizens adopting the socialist ideas of Karl Marx. This ideological standpoint was dangerous to Alexander II as it included an overthrow of the czar’s power. (http://en.wikipedia.org/wiki/Karl_Marx) Another ideological group dangerous to Alexander was the nihilists who later on came to practice terrorism which threatened his life. (Radzinskij, 2008) Contradicting the reasons to reform was the orthodox Christian church that could not agree to these reforms and had given him his power combined with his upbringing which had taught him to preserve royal power as a primary initiative. From a social point of view czar Alexander might have reformed as a reaction to his father’s harsh policies imposed on the people as this was arguably a reason the pressured situation had emerged. An example of this would be the educational reform. (Lovett, 2003) Alexander also introduced a judicial reform based in the French system which greatly simplified criminal matter and rendered the different parties involved in a judiciary process more equal. (Troyat, 1992) The latter reform should reasonably have upped Alexander standings with many groups and fulfilled the cause of making him seem like a reformer in order to soothe radical group such as the nihilists mentioned above.