Compare and contrast the roles and relationships of the following Essay

Compare and contrast the roles and relationships of the following pairs of characters: George and Lennie (of Mice and Men) and Holmes and Watson (Sherlock Holmes stories). Compare and contrast the roles and relationships of the following pairs of characters: George and Lennie (of Mice and Men) and Holmes and Watson (Sherlock Holmes stories). Sherlock Holmes stories are short stories, which involve investigating and solving crimes. They include characters such as Sherlock Holmes and Dr James Watson, these are two main characters who are in each short story trying to solve case investigations. Of mice and men is a story in which two friends, Lennie and George are trying to look for a job so that they can for fill their dream to live in a big house in the country and be able to have no worries. The story is set in California during the American depression in the 1920/30's. The Sherlock Holmes stories are set in the late Victorian era when London was at its worst. It was hard work back then because you would have had to work in most terrible conditions, which was very unpleasant. It was also very unhygienic back then because people would chuck their sewage onto the streets, which caused diseases such as scabies, cholera and scurvy. There was a major disease called the Black Death, which wiped out a large majority of people, it was caused by rats and it was very serious. There would have been a lot of over crowding in the towns because the streets were narrow and enclosed by all of the large buildings. There was a poor travel source, there were horses and trains that you could travel on. This caused locomotion and traffic, which made it difficult to travel around. Lennie and George are two migrant... ... Holmes likes Watson's valuable gift of silence. Holmes and Watson speak to each other in an upper-class manor. For example Holmes says to Watson "I would be very much obliged if you would slip your revolver into your pocket". This shows that they speak to each other in a polite manor. Others see Lennie and George as two hardworking men who are very ambitious and passionate towards their dreams. They see Lennie as a "Big baby", who can't control his temper. Others see George as a very protective and courageous man who is very caring. Others see Holmes and Watson as two upper-class typical friends. They see Watson as a quiet man, who is very inquisitive because he wants to know about every thing Holmes does. Others see Holmes as a very knowledgeable and well-respected man, who is excellent at whatever he does. They also see him as a master of disguise.

Hierarchical Databases Essay

There are four structural types of database management systems: hierarchical, network, relational, and object-oriented. Hierarchical Databases (DBMS), commonly used on mainframe computers, have been around for a long time. It is one of the oldest methods of organizing and storing data, and it is still used by some organizations for making travel reservations. Related fields or records are grouped together so that there are higher-level records and lower-level records, just like the parents in a family tree sit above the subordinated children. Based on this analogy, the parent record at the top of the pyramid is called the root record. A child record always has only one parent record to which it is linked, just like in a normal family tree. In contrast, a parent record may have more than one child record linked to it. Hierarchical databases work by moving from the top down. A record search is conducted by starting at the top of the pyramid and working down through the tree from parent to child until the appropriate child record is found. Furthermore, each child can also be a parent with children underneath it. The advantage of hierarchical databases is that they can be accessed and updated rapidly because the tree-like structure and the relationships between records are defined in advance. Hierarchical databases are so rigid in their design that adding a new field or record requires that the entire database be redefined. Types of DBMS: Network Databases Network databases are similar to hierarchical databases by also having a hierarchical structure. There are a few key differences, however. Instead of looking like an upside-down tree, a network database looks more like a cobweb or interconnected network of records. In network databases, children are called membersand parents are called owners. The most important difference is that each child or member can have more than one parent (or owner). two limitations must be considered when using this kind of database. Similar to hierarchical databases, network databases must be defined in advance. There is also a limit to the number of connections that can be made between records. Types of DBMS: Relational Databases In relational databases, the relationship between data files is relational, not hierarchical Relational databases connect data in different files by using common data elements or a key field. Data in relational databases is stored in different tables, each having a key field that uniquely identifies each row. Relational databases are more flexible than either the hierarchical or network database structures. Types of DBMS: Object-oriented Databases (OODBMS) Able to handle many new data types, including graphics, photographs, audio, and video, object-oriented databases represent a significant advance over their other database cousins. an object-oriented database can be used to store data from a variety of media sources, such as photographs and text, and produce work, as output, in a multimedia format. Object-oriented databases have two disadvantages. First, they are more costly to develop. Second, most organizations are reluctant to abandon or convert from those databases that they have already invested money in developing and implementing. COMPUTING TYPES: CLUSTER COMPUTING: clustering means linking together two or more systems to handle variable workloads or to provide continued operation in the event one fails. Each computer may be a multiprocessor system itself. For example, a cluster of four computers, each with two CPUs, would provide a total of eight CPUs processing simultaneously. When clustered, these computers behave like a single computer and are used for load balancing, fault tolerance, and parallel processing. Two or more servers that have been configured in a cluster use a heartbeat mechanism to continuously monitor each other’s health. Each server sends the other an I am OK message at regular intervals. If several messages or heartbeats are missed, it is assumed that a server has failed and the surviving server begins the failover operation. That is, the surviving server assumes the identity of the failed server in addition to its identity and recovers and restores the network interfaces, storage connections, and applications. Clients are then reconnected to their applications on the surviving server. The minimum requirements for a server cluster are (a) two servers connected by a network, (b) a method for each server to access the other’s disk data, and (c) special cluster software like Microsoft Cluster Service (MSCS). The special software provides services such as failure detection, recovery, and the ability to manage the service as a single system. Benefits of Clustering Technology Availability, scalability and to a lesser extent, investment protection and simplified administration are all touted as benefits from clustering technology. Availability translates into decreased downtime, scalability translates into flexible growth, and investment protection and simplified administration translate into lowered cost of ownership. Clustered systems bring fault-tolerance and support for rolling upgrades. The most common uses of clustering technique are mission-critical database management, file/intranet data sharing, messaging, and general business applications. PARALLEL COMPUTING: The Message Passing Interface (MPI) standard provides a common Application Programming Interface (API) for the development of parallel applications regardless of the type of multiprocessor system used. In the recent past, the Java programming language has made significant inroads as the programming language of choice for the development of a variety of applications in diverse domains. IPV4/IPV6: What is Internet Protocol? Internet Protocol is a set of technical rules that defines how computers communicate over a network. There are currently two versions: IP version 4 (IPv4) and IP version 6 (IPv6). What is IPv4? IPv4 was the first version of Internet Protocol to be widely used, and accounts for most of today’s Internet traffic. There are just over 4 billion IPv4 addresses. While that is a lot of IP addresses, it is not enough to last forever. What is IPv6? IPv6 is a newer numbering system that provides a much larger address pool than IPv4. It was deployed in 1999 and should meet the world’s IP addressing needs well into the future. PROTOCOLS: File Transfer Protocol (FTP) is a standard network protocol used to transfer files from one host or to another host over a TCP-based network, such as the Internet. The Hypertext Transfer Protocol (HTTP) is an application protocol for distributed, collaborative, hypermedia information systems.[1] HTTP is the foundation of data communication for the World Wide Web. Hypertext is a multi-linear set of objects, building a network by using logical links (the so-called hyperlinks) between the nodes (e.g. text or words). HTTP is the protocol to exchange or transfer hypertext. Secure Sockets Layer (SSL), are cryptographic protocols that provide communication security over the Internet. SSL encrypt the segments of network connections at the Application Layer for theTransport Layer, using asymmetric cryptography for key exchange, symmetric encryption for confidentiality, and message authentication codes for message integrity. In computing, the Post Office Protocol (POP) is an application-layer Internet standard protocol used by local e-mail clients to retrieve e-mail from a remote server over a TCP/IPconnection.[1] POP and IMAP (Internet Message Access Protocol) are the two most prevalent Internet standard protocols for e-mail retrieval.[2] Virtually all modern e-mail clients and servers support both. The POP protocol has been developed through several versions, with version 3 (POP3) being the current standard. Most webmail service providers such as Hotmail, Gmail and Yahoo! Mail also provide IMAP and POP3 service. Simple Mail Transfer Protocol (SMTP) is an Internet standard for electronic mail (e-mail) transmission across Internet Protocol (IP) networks. While electronic mail servers and other mail transfer agents use SMTP to send and receive mail messages, user-level client mail applications typically only use SMTP for sending messages to a mail server for relaying. The User Datagram Protocol (UDP) is one of the core members of the Internet protocol suite, the set of network protocols used for the Internet. With UDP, computer applications can send messages, in this case referred to as datagrams, to other hosts on an Internet Protocol (IP) network without prior communications to set up special transmission channels or data paths. UDP is suitable for purposes where error checking and correction is either not necessary or performed in the application, avoiding the overhead of such processing at the network interface level.

Discipline and Management: Different Yet Related Essay

In a classroom setting, discipline and management are two key components for classroom success. Teachers often use the terms classroom management and classroom discipline interchangeably. However, the two ideas are very different in their application. Management and discipline are two halves of the same coin, they are intrinsicly connected to each other, but they have their own individual properties, with their own look and feel. Classroom management deals with how things in a class are done. Classroom management is the sole responsibility of the teacher. It encompasses all of the teacher’s interactions with students, classroom environment, rules and procedures, instructional strategies and development of engaging work. In a well managed classroom, the teacher implements policies and develops routines that stabilize and direct the flow of a class. Effective teachers manage their classes so that students spend their time more productively. Elements of classroom management vary. No two classes are alike. However the foundational elements a teacher takes into account before students ever set foot in the build can lend to better classroom management. Things such as classroom layout and organization .A neat and organized classroom tells your students you mean business and you expect them to keep the classroom organized as well. Deciding how to divide up classroom time is another important aspect to classroom management.Lunch, recess, breaks, down-time between lessons and activities, moving from one classroom to another, interruptions, and other periods of non-instructional time can account for at large percent of an elementary school day. By establishing routines that eliminate wasted time and confusion, using learning centers, independent assignments, and seat work to allow time to work with small groups, and creating a classroom environment that allow students and activities to move smoothly from one activity to the next, a teacher can increase their students time on task, and raise their students engagement with the material. Classroom discipline is a companion to classroom management, part of a routine class session, and a system to maintain desired behaviors.What system is the best and how do I implement it? there are many experts telling teachers how to handle discipline problems in the classroom. Yet these experts do not always agree. Thomas Gordon, creator of Teacher Effectiveness Training staunchly opposes Lee Canter’s Assertive Discipline concept. Yet, both have enjoyed a great deal of success with books and conferences and classes taught all over the USA. Trying to decide who is right and who is wrong seems quite difficult. Instead, let us assume that both of them are right, that they just are not talking about the same students. There is no cure-all for classroom discipline. There are no magic words that will solve classroom discipline. No other teacher has the answers for your classroom discipline either. Every elementary, middle and high school educator has to deal with the unenviable task of enforcing classroom discipline. there is no one-size-fits-all for classroom discipline. However the goal is still the same for every classroom, which is for students to be engaged in the classroom at all times.

SAT vs ACT Math Which Is Easier

SAT vs ACT Math Which Is Easier SAT / ACT Prep Online Guides and Tips If you put to a vote whether the ACT Math test or the SAT Math test is easier, there's going to be heavy contention on both sides. Some will swear up and down (and sideways) that the SAT Math section is easier. Others will not be moved by any force in the world away from the position that the ACT Math section is the simpler one. But which faction is right? And more importantly, which test should you take? We’ve broken down the ins and outs of each math test to tell you which is easier, depending on the type of test taker and math student you are. Note: This article is based on the old (pre-2016) SAT Math format. For an updated comparison of the ACT and SAT Math sections, refer to our guide on the differences between these two tests. SAT and ACT Math Basics Though there are more similarities than not between the ACT Math section and the SAT Math section, there are still distinct differences in the structure, content, and timing of each test. And these differences are what make many people favor one math test over the other. In this section, we'll break down the basics of the style and content of each math section. We'll then compare the two tests in more detail side-by-side, giving you the pros and cons of each. Style of the SAT and ACT Math Tests While the tests are, of course, both math tests, each has its own distinct "flavor" and testing style. In this case, the "style" of the test includes the pacing of each test, the way the questions are phrased, and what each test sets out to measure. At the most basic level, the ACT Math section is set up to test how well you’ve retained your mathematical knowledge up to this point in your academic career. It also does this on a rapid timetable to make it a little more challenging. The questions will be a mixture of scenario ("Mary has 12 apples ...") and non-scenario ("Solve for x"), but each problem is designed to be as clear and straightforward as possible. The goal is to test you on the math concept at hand more than anything else- do you know how to solve it, or don't you? The SAT, on the other hand, is designed to test both your accumulated math knowledge as well as how well you can apply this knowledge to new math scenarios. The test is slower (meaning you have more time per question than you do on the ACT) and generally requires you to have a higher level of reading comprehension. The questions will be a mixture of scenario and non-scenario in addition to straightforward and "tricky." In general, questions at the beginning of each section will be straightforward, while questions at the end of each section will require more creative mathematical thinking and attention to detail. As you can see, although both the ACT and SAT Math tests are, at their core, a test of your math skills, their styles are noticeably distinct. Content of the SAT and ACT Math Tests Now that we've talked a little about the style and presentation of the SAT and ACT Math tests, let's talk about the math content each section covers. Both tests are designed to measure the math skill levels of millions of students each year, each of whom comes from a different background and brings different strengths to the table. This means that each test must be challenging for the vast majority of students (after all, if everyone got 100% of the questions right, it wouldn't do much to indicate individual skill level, would it?). Some of this challenge comes from the style of the test, as we saw earlier, and the rest comes from the content of each test. The ACT covers a wider range of math content than the SAT does, including algebra, plane and coordinate geometry, pre-calculus (including logarithms, rational numbers, complex numbers, and polynomials), and trigonometry. It's a good idea to take the ACT only while or after taking a class that covers pre-calculus and/or trig (or at least taken a stab at learning the subjects on your own). It's also important to note that you will not be given a formula box on the ACT, so you will have to memorize every formulayou'll need. The SAT covers a much narrower math subject range compared to the ACT and is limited to algebra and plane/coordinate geometry.You will never see trigonometry questions on the SAT and can realistically do quite well on the test without taking a pre-calculus class (though, of course, the more math classes you take in school, the better prepared you'll be for any standardized math test). You will also be given a formula box. But while the math content of the SAT is less extensive, each concept is tested in more detail and in new and creative ways. For example, you might have two questions on slopes for the ACT, but five or six slope questions- each of which will test you on a more nuanced facet on the subject- on the SAT. Naughty-nice list, pros and cons ... basically the same thing, right? ACT Math vs SAT Math: Pros and Cons So we’ve looked at the basics for the SAT and ACT Math tests, but how do you weigh in on the pros and cons of each? Let’s take a look. Aptitude vs Achievement Whether or not you agree that the ACT and SAT Math sections achieve what they were set up to measure, each test was designed with a specific purpose in mind. The SAT was designed to test the aptitude of a student- basically, one’s raw potential. How well do you solve puzzles? How well can you incorporate and use new information? Though you can (and absolutely should!) study for the SAT, the test was designed to measure a student’s ability to reason. The ACT, on the other hand, was designed as a test of achievement. How well have you learned a topic? Can you prove that mastery on paper? In this way, the ACT is more like the tests you take in school: learn a topic and take a test to illustrate that you’ve mastered it. Now, again, it can be argued that the tests are more alike than they are different when it comes to reflecting student ability (as well as other factors), but this is how they were set up and designed, and so some of these values still hold true. Special Note: The new SAT is making more of a transition toward testing student achievement, much like the ACT. This means that the two tests will soon have less variation on this measure than they do now. Reading Comprehension vs Trigonometry The SAT Math section is like a cross between a math test and a reading test. To solve each math question, you must first break down exactly what the question is asking you to find (often trickier than it sounds!) and then use your mathematical know-how to find that information. The ACT Math section is more straightforward and will generally only ask you to demonstrate your existing knowledge in exactly the same way the math tests you take in school do. The drawback is that you must have a wider range of math knowledge going into the test. If you don’t know trigonometry or logarithms (and if you haven't memorized your formulas), then you will miss questions on a significant chunk of the test. Trickier Questions vs Time Crunch Many SAT Math questions in the medium- and high-difficulty range are designed to make students who aren’t paying attention fall into math traps and choose bait answers. If you have familiarized yourself with the types of questions on the SAT, you will often be able to dodge these metaphorical pitfalls- but it’s not always easy. To balance this out, you will have 1.25-1.4 minutes to answer each math question (depending on the section). This is to give each student long enough to both answer the question and double-check the work, but always keep in mind that everyone’s test-taking pace is different. The ACT Math questions are, again, more direct and aren't designed to trick you, though this does notmean they are easy. You must also answer more questions in a shorter amount of time to make up for the benefit of more straightforward questions. You will only have an average of one minute per ACT Math question, which means you only have 70% as much time to answer each question as you do on most SAT Math questions. Multiple Short Sections vs All at Once Some people thrive on getting tasks done all at once, while others need breaks between subjects. How you test utterly depends on you. The SAT breaks up each of its three topics- Writing, Critical Reading, and Math- into multiple sections and scatters them throughout the whole test. You will never have to focus on one topic for more than 25 minutes at a stretch on the SAT. This can be a great gift for people who need to vary up their routine or who run out of steam in the long-term, but can be distracting for others who have trouble switching focus from topic to topic. The ACT tests each of its four subjects- Reading, Math, English, and Science- individually and completely. The subjects are not broken up and scattered but are arranged in order and must be completed one at a time. The ACT Math test is a full 60 minutes and takes place all at once, which is good for anyone who likes to get tasks completed and out of the way; however, this might be exhausting for others. Leaving Blank Answers vs Strategically Guessing The SAT penalizes random guessing by issuing a -0.25 point penalty for any wrong answer. If you can eliminate answer choices, your best bet is to guess, but if you can't, then you're better off leaving the answer blank. This point penalty can also be a huge blow to your score if you aren't careful about selecting your answer choices. Remember that many questions in the medium- and high-difficulty section on the SAT are engineered to make students make "careless errors." These errors include finding the wrong value (e.g., finding x instead of 2x), stopping the process of solving a math problem too soon, or performing a math function the wrong number of times. Often, you will see bait answers in the answer choices that correspond with these mistakes. This means that you should always be as sure as you can be about your answer choices before you make your final decision, especially with those questions in the medium- and high-difficulty range. Note that the SAT Math questions are in ascending order of difficulty and this resets for the grid-in. So the "high difficulty" range on the SAT is in the last several problems of each Math section, and in the multiple-choice questions right before the grid-in questions begin. The ACT, on the other hand, does NOT issue a point penalty for guessing or wrong answers. If you can eliminate answer choices, great! If not, it’s still fine! Always make a guess on an ACT question and never leave a question blank. It might seem that the ACT is easier than the SAT- after all, why be penalized when you don’t have to be?- but remember that the test is also curved across all students who take the test. So it might be the case that you as an individual will lose fewer points on the ACT because there is no guessing penalty, but it will be the same for everyone elseas well. In the end, the curve is about the same whether your guessing is penalized or not, so your best option for either test is to eliminate answer choices where you can and guess with as much strategy as possible. For more on how to guess questions on the SAT and ACT, check out our individual guides. Though we can't promise you'll be entirely "happy" taking either test, you will likely have a preference for one over the other. SAT Math vs ACT Math: Which Test Is Better for You? What it all comes down to is which test should you take: ACT Math or SAT Math? Unfortunately, the only way you will truly be able to determine which test is better for you is to sit down and take each one. If you're going to dedicate the recommended amount of time to studying (about 40 hours is a good rule of thumb) for your standardized test of choice, you may as well start by finding the right test for you. After all, how awful would it be to spend 30 hours studying for the ACT only to discover that you like the SAT better, or vice versa? So check out where to find real, free practice tests online for both the ACTand the SAT,and carve out some time (on separate days!) to take each one. But if you’re truly determined to only take one test, or if you simply want to know where to start first, take a look below. Be honest with yourself about your mathematical strengths and weaknesses, and find the test that you feel you can soundly conquer. Type of Math Student ACT SAT Does well on math tests in school âÅ"“ âÅ"“ Is good at memorizing mathematical concepts âÅ"“ Is good at solving new puzzles âÅ"“ Works well at a fast pace âÅ"“ Is good at paying attention to details âÅ"“ Does well on reading comprehension âÅ"“ Doesn’t get bored or tired easily âÅ"“ Has taken pre-calculus and/or trigonometry âÅ"“ Likes to switch focus from topic to topic âÅ"“ SAT Math or ACT Math? The Takeaways Both the ACT and SAT Math sections are entirely trainable, and you will be able to build up your scores no matter where you start. So take a look at each test and find the one that is more comfortable for you, both in terms of the math content and the test as a whole. Different people have different strengths and weaknesses, so don’t worry about what anyone else says is easier or better. Colleges have no preference whatsoever anymore for which test you take, so the decision is entirely up to you! What’s Next? Worried that your school of choice really does have a preference for the ACT or SAT? Check out how the Ivy Leagues feel about the ACT and SAT. Running out of time during your ACT or SAT Math section? Our guides will help you beat the clock on both the ACT Math section and the SAT Math section. Aiming for a perfect SAT/ACT Math score? Once you've decided on your test of choice, check out how to get a perfect 36 on the ACT Math section or a perfect 800 on the SAT Math section. Want to improve your SAT score by 160 points? Check out our best-in-class online SAT prep program. We guarantee your money back if you don't improve your SAT score by 160 points or more. Our program is entirely online, and it customizes what you study to your strengths and weaknesses. If you liked this Math strategy guide, you'll love our program.Along with more detailed lessons, you'll get thousands ofpractice problems organized by individual skills so you learn most effectively. We'll also give you a step-by-step program to follow so you'll never be confused about what to study next. Check out our 5-day free trial: Disappointed with your ACT scores? Want to improve your ACT score by 4+ points? Download our free guide to the top 5 strategies you need in your prep to improve your ACT score dramatically.

Chemosynthesis Definition and Examples

Chemosynthesis Definition and Examples Chemosynthesis is the conversion of carbon compounds and other molecules into organic compounds. In this biochemical reaction, methane or an inorganic compound, such as hydrogen sulfide or hydrogen gas, is oxidized to act as the energy source. In contrast, the energy source for photosynthesis (the set of reactions through which carbon dioxide and water are converted into glucose and oxygen) uses energy from sunlight to power the process. The idea that microorganisms could live on inorganic compounds was proposed by Sergei Nikolaevich Vinogradnsii (Winogradsky) in 1890, based on research conducted on bacteria which appeared to live from nitrogen, iron, or sulfur. The hypothesis was validated in 1977 when the deep sea submersible Alvin observed tube worms and other life surrounding hydrothermal vents at the Galapagos Rift. Harvard student Colleen Cavanaugh proposed and later confirmed the tube worms survived because of their relationship with chemosynthetic bacteria. The official discovery of chemosynthesis is credited to Cavanaugh. Organisms that obtain energy by oxidation of electron donors are called chemotrophs. If the molecules are organic, the organisms are called chemoorganotrophs. If the molecules are inorganic, the organisms are terms chemolithotrophs. In contrast, organisms that use solar energy are called phototrophs. Chemoautotrophs and Chemoheterotrophs Chemoautotrophs obtain their energy from chemical reactions and synthesize organic compounds from carbon dioxide. The energy source for chemosynthesis may be elemental sulfur, hydrogen sulfide, molecular hydrogen, ammonia, manganese,  or iron. Examples of chemoautotrophs include bacteria and methanogenic archaea living in deep sea vents. The word chemosynthesis was originally coined by Wilhelm Pfeffer in 1897 to describe energy production by oxidation of inorganic molecules by autotrophs (chemolithoautotrophy). Under the modern definition, chemosynthesis also describes energy production via chemoorganoautotrophy. Chemoheterotrophs cannot fix carbon to form organic compounds. Instead, they can use inorganic energy sources, such as sulfur (chemolithoheterotrophs) or organic energy sources, such as proteins, carbohydrates, and lipids (chemoorganoheterotrophs). Where Does Chemosynthesis Occur? Chemosynthesis has been detected in hydrothermal vents, isolated caves, methane clathrates, whale falls, and cold seeps. It has been hypothesized the process may permit life below the surface of Mars and Jupiters moon Europa. as well as other places in the solar system. Chemosynthesis can occur in the presences of oxygen, but it is not required. Example of Chemosynthesis In addition to bacterial and archaea,  some larger organisms rely on chemosynthesis. A good example is the giant tube worm which is found in great numbers  surrounding deep hydrothermal vents. Each worm houses chemosynthetic bacteria in an organ called a trophosome. The bacteria oxidize sulfur from the worms environment to produce the nourishment the animal needs. Using hydrogen sulfide as the energy source, the reaction for chemosynthesis is: 12 H2S 6 CO2 → C6H12O6 6 H2O 12 S This is much like the reaction to produce carbohydrate via photosynthesis, except photosynthesis releases oxygen gas, while chemosynthesis yields solid sulfur. The yellow sulfur granules are visible in the cytoplasm of bacteria that perform the reaction. Another example of chemosynthesis was discovered in 2013 when bacteria were found living in basalt below the sediment of the ocean floor. These bacteria were not associated with a hydrothermal vent. It has been suggested the bacteria use hydrogen from the reduction of minerals in seawater bathing the rock. The bacteria could react hydrogen and carbon dioxide to produce methane. Chemosynthesis in Molecular Nanotechnology While the term chemosynthesis is most often applied to biological systems, it can be used more generally to describe any form of chemical synthesis brought about by random thermal motion of reactants. In contrast, mechanical manipulation of molecules to control their reaction is called mechanosynthesis. Both chemosynthesis and mechanosynthesis have the potential to construct complex compounds, including new molecules and organic molecules. Resources and Further Reading Campbell, Neil A., et al. Biology. 8th ed., Pearson, 2008.Kelly, Donovan P., and Ann P. Wood. â€Å"The Chemolithotrophic Prokaryotes.† The Prokaryotes, edited by Martin Dworkin, et al., 2006, pp. 441-456.Schlegel, H.G. â€Å"Mechanisms of Chemo-Autotrophy.† Marine Ecology: a Comprehensive, Integrated Treatise on Life in Oceans and Coastal Waters, edited by Otto Kinne, Wiley, 1975, pp. 9-60.Somero, Gn. â€Å"Symbiotic Exploitation of Hydrogen Sulfide.† Physiology, vol. 2, no. 1, 1987, pp. 3-6.

Small essay Example | Topics and Well Written Essays - 250 words

Small - Essay Example It also entails maximizing the marginal costs and the marginal revenue perspectives depending on the total profit where it reaches the marginal revenue and costs. Therefore, in this situation, the monopolist can maximize his business profits by choosing his outputs in that the marginal revenues will be equal to the marginal costs. Alternatively, the monopolist can decide to charge high prices since he is not experiencing real competition in the market (Spate, 1983). It is quite common to see many business owners still keeping their businesses open despite the deterioration instead of shutting the business down. The main answer to this is because of the total revenue and the total variable costs (Spate, 1983). Most business owners who are not in a hurry to shut down their business tend to be enjoying the total revenues, which are always greater as compared to the total variable costs. However, the biggest disadvantage of this situation is the fact that the profitability will not last forever. The profits and in this case the total revenues would be diminish with time (Spate,

Exclusionary rule Essay Example | Topics and Well Written Essays - 500 words

Exclusionary rule - Essay Example It was applied in 1955 in California supreme court in a case between people V. Cahan, so by almost 1960, 22 sates in USA adopted the rule, this are califormia, Delaware, Frorida, Idaho, Illinois, Indiana, Kentucky, Mississippi, Missouri, Montana, north, Caolina, Oldahoma, Oregon, Rhode Island, Tennesse, Washington, Texas, west Vigina, Wisconsin, Wyoming, Michigan. Also Exclusionary Rule does not bar the introduction of all evidence obtained in violation of the fourth, Fofth, or Sixth Amendment in case of Criminal case. See Hudson V. Michigan, 547. U.S. 586, 126 S. Ct. 2159 (june 1, 2006), justice scalia write for U.S. Supreme court. (http://en.wikipedia.org/wiki/Exclusionary_rule)Suppression of evidence, however, has always been our last resort, not our first impulse. The exclusionary rule generates "substantial social costs," United States v. Leon, 468 U.S. 897, 907 (1984), which sometimes include setting the guilty free and the dangerous at large. We have therefore been "cautious against expanding" it, Colorado v. Connelly, 479 U.S. 157, 166 (1986), and "have repeatedly emphasized that the rule's 'costly toll' upon truth-seeking and law enforcement objectives presents a high obstacle for those urging [its] application," Pennsylvania Bd. of Probation and Parole v. Scott, 524 U.S. 357, 364-365 (1998) (citation omitted).