How Surface Area to Volume Ratio Affects the Rate of Heat Loss :: Depression and Suicide

How Surface Area to Volume Ratio Affects the Rate of Heat Loss Aim The aim of this investigation is to answer the following questions: Why do elephants have trouble cooling down? And why do mice have trouble keeping warm. Apparatus 5x cans (5 different sizes) 1x Bunsen burner 1x heatproof mat 1x Thermometer 1x Ruler 1x Kettle 1x Stopwatch 1x Tripod 1x Gauze 1x Clamp and stand Plan ==== * Label each can from A to E in ascending order, A the biggest and E the smallest. A representing the mouse and E representing the elephant. * Measure and record the height and diameter of each can. * Fill can A to the top with boiling water out of the kettle. * Bring the water back up to a temperature of 100 degrees Celsius, to make sure it is a fair test and that all the cans start from 100 degrees Celsius. * Use a clamp and stand to hold the thermometer inside the can, position it so that the bulb of the thermometer is in the centre of the can. * With a stopwatch ready to start timing, switch off the gas to turn off the Bunsen burner and start timing. * Read and record the temperature on the thermometer every two minutes for twenty minutes. * Repeat this for all of the other cans, twice for each one and make a recording of all the temperatures, and work out the averages. Safety ====== * Always wear safety glasses during the practical to protect the eyes and avoid any hot water being splashed into them.

The Ice Cream Incident :: English Literature Essays

The Ice Cream Incident The Ice Cream Incident Eric Mortinson November 18, 2002 There inevitably comes a time during the course of your life where everything you are employs itself to seek revenge from a friend or loved one. This paradoxical concept drives you to the point of hating someone you care dearly for. In the end, the typical result is absolute regret. This moment in my life came at the ancient age of 13. I was the intellectual king of my class. No cerebrum could surpass the database of knowledge I carried within me. This sovereign fantasy of mine was shattered on the nightmarish day Josh Renfro entered the 5th grade classroom at Evans Valley Elementary School. I knew immediately that I was outmatched at last. As the old saying goes, "If you can't beat 'em, join 'em." That's precisely what I did. I quickly befriended Josh and became a study partner, even doing an intricate report with him. That joyous year of friendship was over within a few months, and a new challenge awaited us new friends. Josh and I perceived middle school as an educational joke. Most of the material being covered had already been noted and logged into our far advanced memory banks. Getting an 'A' became so simple that we resorted to analyzing teachers and their techniques (which we used for later use) as a form of intellectual entertainment. It was a little past the middle of our 6th grade year when the infamous incident happened. It was late in the science period when Mr. Harrison made an odd request of Justin Watkins and I. He stated that there was a short film that was going to be viewed, that therefore required us to assemble the ancient film projector. As Justin and I constructed and positioned the prehistoric projector, we concentrated hard on the correct assembly and use of this long forgotten technological marvel. Little to our knowledge, a minute science assignment was given to the class as Justin and I worked feverishly. The period ended after the short film; the day ended normally. First period came, and with it came the rumor of an unknown assignment. I questioned, "Josh, did we have a science assignment 'cause someone told me we did. I haven't heard anything about it." "Nope," he replied innocently, "Mr. Harrison didn't give us anything to do. We just watched that movie remember?

Migration Project Essay

The Tony’s Chips web site is to be moved from and external hosting solution to an internal solution. In addition, the site will be redesigned to enable customers to place orders. These are two separate work tasks that should be treated separately and performed by different team members. There are many options for hosting the web site internally, including software choices to hardware architecture. This document will review the tasks that need to be performed, document the process of performing those tasks, and justify the software and hardware choices. There are a few different alternatives to how this web site can be hosted. The company could host the web site with an external service that maintains their own servers and services. This method is commonly used by start-up businesses and web sites that do not require a huge amount of customization, monitoring, bandwidth, and storage. When a company wishes to have more control over their site and how it is hosted, they can chose to use a server service. With this kind of service, a company that owns a large server farm leases out one or more servers to the company. This allows the company to have dedicated servers, which they have control over without the need to physically store the server or perform the regular maintenance. Web sites that involve database-driven web applications can eventually require many different servers. This can be a problem for some companies that do not have the logistical capabilities to store these servers on-site. Consider that these servers will take up space, require appropriate cooling, and warrant a sophisticated fire-suppression system. A server farm service will have all of this in place all ready at no additional cost to the client. The first step in migrating the web site from an externally hosted service to an internal system is to get the infrastructure in place. This includes the physical computers that will be used, the software servers that will be installed on these computers, the network configuration, the wide area network connectivity, and the necessary firewall. Once all of this is in place, the content of the external web site should be replicated to the internal system, as it currently is. Then, after testing the internal web site via the IP address that points to the internally-hosted version, the systems administrators can update the DNS record for the web-site’s domain name to point to the internally hosted version. This can take a couple days to fully produce across the major DNS backbone on the internet. During that time, some traffic will go to the internal site and some will go to the external site. There will be no downtime as far as the users of the site are considered. However, some data that is stored as a result of user-interaction may not be record at the new site. This will require that the old site to be left running for a business week. After every day, the old site should be checked for any new data transactions. Any found should be migrated to the new site. While this method will place more work on the staff of the company, it results in zero downtime for users of the site. While this method place more work on the staff of the company, it results in zero downtime for users of the site. The work to be performed in this part of the project can be broken down into: Planning and Analysis, Physical Setup, Software Installation, Code Replication, Data Migration. In the Gantt Chart in the attachment following this paper, a lot of the tasks that are taken during the process of migrating the existing site from an externally hosted service to an internally hosted system can occur concurrently. For instance, installation of the web server and the database server can occur at the same time. This is assuming that the web server and the database server are on two different machines. The system software that will be used is rath er standard for a web site. The paradigm hat is chosen revolves around a Linux, Apache, MySQL, PHP (LAMP) model. The security features available within many distributions of Linux are far better than would be available on Windows. In addition, everything in a LAMP model is freely available. An alternative model would use Windows and IIS. However, Windows and IIS are only available commercially. In contrast, Linux and Apache are free systems that are widely supported and are, by far, the most widely used platform for hosting web sites. In addition, the use of PHP and MySQL is also free. The web site could also be set up with something like Adobe ColdFusion and Microsoft SQL Server. However, both of these items are commercially available for a substantial price. While Microsoft SQL Server is quite popular, it does not come close to the wide spread use of MySQL. Likewise, PHP is an order of magnitude more common than Adobe ColdFusion. There is no reason to spend large quantities of money on application and database servers when the most commonly used, and fully supported systems are freely available. Since Tony’s chips is not currently an extremely large web site that processes millions of transactions a day, the architecture will be rather standard and simple. However, the need for redundancy has been made clear and needs to be taken into consideration. In the interest of making the web site fault tolerant, two web servers, two database servers, and a replication server will be set up for the site. The system administrators must also ensure that wide area network connectivity with a static IP address is set up. This way, the static IP address can be assigned to the domain name in the site’s DNS entry. It is also important that security be taken into consideration. The use of a firewall and a demilitarized zone will be required. The demilitarized zone is in place to ensure that the public can access the web servers. However, the database servers and the replication server will exist behind a firewall that prevents the public from accessing these computers. The only external entities that will be able to access these servers are the web servers themselves. The replication server is exactly what it sounds like. It is in control of the replication of data across the two databases. We want to make certain that if a single database fails, that the other database is still up and running. This requires that we keep two copies of the database running at all times. However, this will not require that the program logic deals with two sets of data. All modern database management systems have the ability to set up a replication service that copies all the data entered into one database into another database. This ensures that if one of the databases fails, we can switch over to the database that is still running. After the failure is resolved, the data between the two servers will need reconciled. However, the users of the web site will not notice an interruption. The same basic concept is used for the web servers. Depending on traffic load or server condition, a web server could crash. To ensure that the system is tolerant of such a fault, two web servers are set up. If one of the computers or web servers crashes, the other one can pick up the traffic. In addition to providing the key benefit of fault tolerance, the additional web server can be set up to use load balancing. Since there will usually be two web servers running at any given time, it is possible to set it ups so that the traffic to the web site is split between the two servers. In a case where the web site is getting a very large amount of traffic in a short amount of time, this can help prevent the web server from getting over-taxed. An illustration of the system architecture is also provided in the attachment following this paper. The requirement to update the web site to facilitate customer orders has been identified. This is a software engineering requirement that is fundamentally separate than the requirement to move from an external host to an internal host. The only major impact that this would have on the migration is in the case that the web site never used a database before this change. This has not been identified. However, even if that were the case, the previously described architecture assumes that a database will be used. Therefore, the architecture that is required for the addition of an ordering system is fully in place. Now that such a system is in place, software engineers and programmers can begin the work of designing and implementing the new ordering system. It would not make sense to roll these processes in with the migration of the web site. Migration of a web site has enough potential pit falls and potential points of failure without adding in the variable of entirely new code. If this were to be done at the same time, a fault in the new ordering code could be mistaken for a fault that occurred with the migration, or vice versa. One of the downsides of hosting a web site internally is that all support will be divested to the company rather than a third-party service. This includes all regular maintenance of the system as well as regular web site support. For maintenance, regular backups of each database should made. This could include nightly backups and weekly backups that are stored off-site. This also involves maintaining network cabling and monitoring the temperature of the server storage area and cleaning dust out of the servers fan vents. This will also require monitoring network activity for malicious attacks such as a port scan or a distributed denial of service. More advanced server solutions that are available as external hosting would include all of this in their service fee. Technologies to detect and prevent things like distributed denial of service takes planning and a non-trivial software investment. Of course, the addition of the ordering system adds new requirements to the web site support. Customers will need a place to email and/or call to inquire about orders or complain about the service they received. There will need to be individual who are responsible for addressing these customer interactions. Evaluation of a web site like the one planned in this document is an ongoing process. At first, the success of the migration is evaluated by the existence and duration of any down time. Then, web site responsiveness and uptime is evaluated. With the measure put into place, the downtime should be zero and the uptime should be close to 100%. Even with redundancy and fault tolerance, it is impossible to guarantee 100% uptime. To evaluate the new order system, the success of orders needs to be taken into consideration. Can customers place the orders that they wish to make? When a product is out of stock, does it state so on the product pages and prevent the customer from placing the order? When the customer places the order, does the financial transaction process successfully? Is the database notified about denied charges? Beyond the mechanics of the order procedures, the number of orders being placed should be evaluated. The success of the web site can partially be evaluated by assessing the conversion rate on the web site. The conversion rate is the number of visitors who proceed to making an order. The goal is to convert as many customers as possible. If the system’s cart and the checkout system is not intuitive, the result could be a very low conversion rate. Conclusion The Tony’s Chips web site will be migrated to an internally hosted system consisting of fault tolerance and redundancy. After this logistical process has been completed and all necessary DNS entries have successfully updated, the system will be modified to include an ordering system so that customer can order chips and any other product that is offered. These two objects are separated to ensure that they do not interfere with one another and to limit the number of variables at any given time. With the proposed architecture and design, it is believed that the new system will be highly efficient and effective. In the attachments following this paper, as some were discussed earlier there will be a gnatt chart, system architecture illustration, and a use case.

Cell Phones Use Cause Accidents

â€Å"Cell phones†, a heavy gadget when it comes to use because it can do things just as computers can but this gadget is also heavy when it comes to pocket and worth of consequences. Discussing about using cell phones is important for the audiences to avoid the consequences of cell phone misuse and avoid the accident that cell phones might cause.com/cell-phone-problem-solution/">Cell phones are a useful gadget and thus it is considered as a primary need of those who are in the business industry and even ordinary people who tends to be away from their family, but these said gadgets also causes accident especially on the road. Body According to the NHTSA, the national highway accidents reported were caused by using cell phones while driving. In addition, the report says that numbers of car crashes were caused by cell phone dialing, listening, as well as talking which leads the drivers to be distracted on the road.Statistics also says that there are almost 80 percent of car cras hes which occur within the span of a short 3 seconds just because of driving distraction caused by cell phone use. People should know that distraction on car driving is worth a big consequence and we, as responsible beings, should know that cell phone use should not be allowed while driving because it will take our attention from the road (Benton). ConclusionCell phone use as well as receiving important calls or responding to important texts messages are considered as the number one distraction factor while driving a car which leads to car accidents. With this very important issue supported by evidences, cell phone use must therefore be restricted while driving a car. If a certain person receives a call while driving, he/she should stop the car on the roadside before he/she should receive the call to avoid the risk of accident. Works Cited Benton, Joe. â€Å"Cell Phone No. 1 Driver Distraction. † 2006.

Claims Essay Example | Topics and Well Written Essays - 1000 words

Claims - Essay Example In the company, there were different groups doing specific tasks and with different leaders and communication system. The groups are motivated in different ways in respect to their output. In my self assessment test, I was exceedingly interested in working in groups. I like being the group leader since I can manage the group dynamics. In my future career plans, I would like to own a company and manage it myself. The competences are incredibly essential in the entire running of the company. They are inter related in that they all aim at achieve organizational goals and objectives. The effectiveness of a manager is determined by the outcome of the organization in regard to the set objectives and goals. If the skills and competences are effective, the organization will manage to achieve their goals and objectives. In most organization, the managers lack some skills and competences leading to poor management. ... In the organization, different personnel did more work than others. The organization had a policy of rewarding people and groups based on the output they delivered. This was extraordinarily critical, and it encouraged people to work extremely hard to get more rewards (Scott, Spriegel and Clothier 22) Nominate one management skill to investigate in the next semester Decision making The main reason why I nominated decision making is due to its daily application in all level of management. When I was working, decision making was my chief problem. This is the process through which managers use to solve existing problems in an organization. It is the key aspects that single out the performance of a manager. In most organization, the success of any organization depends on the decision made by the management. When I was working as a scripter, my key weakness was making the right decisions on time. The manager of the company was always complaining about it, and this triggered me to find mean s to hasten my decision making skills. The main reason why I did not make decisions on time was due to the uncertainty of the outcome (Drucker and Maciariello 56) Guidelines that influence decision making 1. Define the problem. This involves identifying the decision that will help in the attainment of the organizational objectives. The problem may be short-term or long-term. 2. Identification of limiting factors. The decision maker should analyze the ideal resources that are required to implement the decision that is to be made. The manager must have adequate information, personnel, time, supplies and equipment. The manager should also take into account the internal and

Trail of Tears Essay Example | Topics and Well Written Essays - 1250 words

Trail of Tears - Essay Example In addition, they were starved, froze to death and were murdered due to the mandatory relocation policies of the Indian Removal Act of 1830. This Act sought to create a â€Å"white only† America therefore many tribes, predominantly the Cherokee Nation, were forced to leave familiar ancestral lands. The thousand mile journey out of Cherokee, Chickasaw, Choctaw, Seminole and Muscogee lands in the eastern U.S. to present day Oklahoma during the 1830’s is known as the Trail of Tears. This shameful episode in American history is one of the best known and worst examples of how the natives suffered at the hands of the government. It is difficult to visualize the government confiscating a person’s home due their ethnicity alone and forcing them, their family, friends, relatives and neighbors to walk hundreds of miles during a harsh winter but this is what happened 180 years ago to thousands of natives of America. The United States was established by and for the people an d built on precept of justice for all. However, barely a half century from its founding, this same government and its supposed democratic values subjugated all persons of color. Blacks were enslaved, taken from their lands and Indians subjugated, slaughtered and forced off their lands. The natives who survived the mass exodus found themselves in strange place which is a frightening prospect for people whose life depended on knowing every feature of recognizable territory. Today, the horrific story of the Trail of Tears stirs the emotions of all American citizens but at the time of the removal this crime against humanity of historic proportions symbolized the existing feelings towards the natives, feelings which were represented by laws directed against them. The incident questioned the widely held perception that America was a fair and just country. In April of 1838 Ralph Waldo Emerson wrote a letter to President Martin Van Buren regarding Cherokee removal. The letter said, in part, â€Å"You, sir, will bring down that renowned chair in which you sit into infamy if your seal is set to this instrument of perfidy; and the name of this nation, hitherto the sweet omen of religion and liberty, will stink to the world.† (Logan, 2004) In May 1938, in opposition to the nation’s guiding principles precept and a week before the deadline of eviction, government troops began the cruel process of forcibly removing native people from their ancestral homeland. Those still remaining were not given enough time to collect any personal effects such as food or clothes before being forced to live in make-shift camps. Many Indians, including children, were separated from their tribes and families. Their now empty homes were plundered by soldiers even while they were being taken away at gunpoint. â€Å"Families at dinner were startled by the sudden gleam of bayonets in the doorway. Men were seized in their fields or going along the road, women were taken from their wh eels and children from their play. They saw their homes in flames, fired by the lawless rabble that followed on the heels of the soldiers to loot and pillage. Hunts were made by the same men for Indian graves, to rob them of the silver pendants and other valuables deposited with the dead.† (Logan, 2004) Removing the native people from their former lands was inevitable and had been wanted by many long before it occurred. The European descendents had been

Marketing Plan and Questionnaire Assignment Example | Topics and Well Written Essays - 1250 words

Marketing Plan and Questionnaire - Assignment Example Political aspect †¢ Stability in the political environment within the United Kingdom America. †¢ Democracy been practiced in the political processes. †¢ Cordial relationship across the globe. †¢ Political regime has created a conducive environment for business people through political goodwill. Economic aspect †¢ The GDP of the United Kingdom has improved from 1.7% in 2013 to 2.6% in 2014. †¢ The inflation rate in the United Kingdom is relatively low. currently at 1.8% †¢ Formation of trade blocs such as EU. †¢ The unemployment rate in UK has dropped to 5.5% while the wage rise by 2%. †¢ Per capita income of the United Kingdom has increased from $41,776.80 in 2013 to $45,603.30 in 2014 Social aspect †¢ The population in the United Kingdom and the globe is increasing. †¢ There are different age groups in the UK who demand different products. †¢ There are different social-classes i.e. Upper class, middle-class, and lower class . History aspect †¢ Nightwear have been worn in the UK for a long time ever since 1880s. Technological aspect †¢ Designing of nightwear should satisfy the clients †¢ Production processes involved should be efficient has technology evolves. †¢ Enhancement in the Platform for conducting business e.g. online marketing. †¢ Transfer and adoptability of technology in apparel industry. †¢ Cost versus benefit of a given technology need to be analyzed. Environment aspect