Life on Earth During the Precambrian Time Span

Life on Earth During the Precambrian Time Span The Precambrian Time Span is the earliest time period on the Geologic Time Scale. It stretches from the formation of the earth 4.6 billion years ago to around 600 million years ago and encompasses many Eons and Eras leading up to the Cambrian Period in the current Eon. Beginning of Earth The earth was formed about 4.6 billion years ago in a violent explosion of energy and dust according to the rock record from Earth and other planets. For about a billion years, the earth was a barren place of volcanic action and a less than suitable atmosphere for most types of life. It wasnt until about 3.5 billion years ago that it is thought that the first signs of life formed. The Beginning of Life on Earth The exact way life began on Earth during the Precambrian Time is still debated in the scientific community. Some theories that have been posed over the years include the Panspermia Theory, Hydrothermal Vent Theory, and Primordial Soup. It is known, however, there was not much diversity in organism type or complexity during this extremely long period of Earths existence. Most of the life that existed during the Precambrian Time span were prokaryotic single-celled organisms. There is actually a pretty rich history of bacteria and related unicellular organisms within the fossil record. In fact, it is now thought that the first types of unicellular organisms were extremophiles in the Archaean domain. The oldest trace of these that have been found so far is around 3.5 billion years old. These earliest forms of life resembled cyanobacteria. They were photosynthetic blue-green algae that thrived in the extremely hot, carbon dioxide-rich atmosphere. These trace fossils were found on the Western Australia coast. Other, similar fossils have been found all over the world. Their ages span about two billion years. With so many photosynthetic organisms populating the earth, it was only a matter of time before the atmosphere started to accumulate higher levels of oxygen since oxygen gas is a waste product of photosynthesis. Once the atmosphere had more oxygen, many new species evolved that could use oxygen to create energy. More Complexity Appears The first traces of eukaryotic cells showed up about 2.1 billion years ago according to the fossil record. These seem to be single-celled eukaryotic organisms that lacked the complexity we see in most of todays eukaryotes. It took about another billion years before the more complex eukaryotes evolved, probably through endosymbiosis of prokaryotic organisms. The more complex eukaryotic organisms began living in colonies and creating stromatolites. From these colonial structures most likely came multicellular eukaryotic organisms. The first sexually reproducing organism evolved around 1.2 billion years ago. Evolution Speeds Up Towards the end of the Precambrian Time period, much more diversity evolved. The earth was undergoing somewhat rapid climate changes, going from completely frozen over to mild to tropical and back to freezing. The species that were able to adapt to these wild fluctuations in climate survived and flourished. The first protozoa appeared followed closely by worms. Soon after, arthropods, mollusks, and fungi showed up in the fossil record. The end of the Precambrian Time saw much more complex organisms like jellyfish, sponges, and organisms with shells come into existence. The end of the Precambrian Time period came at the beginning of the Cambrian Period of the Phanerozoic Eon and Paleozoic Era. This time of great biological diversity and rapid increase in organism complexity is known as the Cambrian Explosion. The end of the Precambrian Time marked the start of the more quickly progressing evolution of species over Geologic Time.

How to Decide If You Should Quit Your Job A Step-by-Step Guide

How to Decide If You Should Quit Your Job A Step-by-Step Guide You’ve had it, you’ve really had it this time. The de-stressing techniques you learned in your yoga class are no longer working, and the thought of getting up in the morning and going in to work gives you anxiety hives, the likes of which you haven’t seen since tenth grade geometry exams. But is this it? Is it time to cut bait on this job and start scrambling for something else? And if so, how does one do that without regretting an impulsive choice? There are a lot of different factors to consider. Like:If I do decide to quit, should I do it before I have a job offer?If I don’t have a job offer waiting in the wings, can I justify leaving my job in an uncertain economy?Is this really quit-worthy, or am I just reacting to a temporary situation?Am I prepared for a long job hunt?What can I do in the meantime?That’s a lot of stuff to have swirling around in your head while you try to make a major life decision. Let’s break it down a little more.Sh ould I Quit?Quitting your job is not a decision to make lightly. A new job right away isn’t a given, but there’s also your longer career to think about: if you sacrifice your position now, will that set you back in the long term? Or will it increase the likelihood that you’ll find the next great opportunity by giving yourself this push? The first step in making this decision is always, always to do a self-assessment. Thinking, â€Å"I should quit,† and then handing in your resignation that day, is more likely to lead to panic and regret sooner than later. So if you’re angry, wait until that red rage subsides a little bit, and ask yourself, â€Å"why am I so unhappy here?†According to some experts, the best place to start is a simple pro/con list:What do I like about this job?What do I dislike about this job?What’s missing from this job?What would I want from this job that I’m not getting?After you’ve got your basic rundo wn of what’s bugging you about your job, the next step is to figure out if any of the â€Å"cons† are fixable. Would reprioritizing your duties help? Would your boss be receptive to changing things to be more amenable to your needs, or talking about a raise? If you don’t see those cons as budging anytime soon, then it’s likely time to move on. Also, if the â€Å"con† list is much longer than the â€Å"pro† side, that’s a clue that the problems may not be fixable enough.RELATED:  10 Signs It’s Time to Quit Your JobAnother factor to consider is whether it’s really the job making you unhappy. If the â€Å"pro† list is substantial and the â€Å"cons† don’t seem so bad once you’ve written them out, it might be that you’re unhappy in other aspects of your life, and it’s bleeding into your work life. If it’s just the job that’s causing stress and tension, then you may wa nt to move forward with quitting. If you think it’s your relationships or financial issues or anything else in your life that’s exacerbating standard work stress, then try addressing those factors first. You may find that you’re not as unhappy at work once other issues are resolved (or at least worked on).Once you have your self-assessment complete, and have a stronger sense of what’s causing your work malaise, it’s time to do the next level of research: talking about it to someone at work.I Want to Try to Make It Work. How Do I Make Things Better?Schedule some time with your boss where you can sit down alone and talk about your unhappiness. If your compensation is the problem, be prepared to ask for a raise. If it’s your workload, ask about how you can reprioritize your duties. If it’s a conflict with other employees, you can get feedback about how to deal with it, officially or unofficially. Either way, be prepared for a frank discu ssion with your supervisor. And it’s important to keep the tone as neutral as you can- you don’t want your concerns to be dismissed as a rant, or have anyone question your professionalism. If you’re concerned that you will chicken out or will get very angry, practice your talking points ahead of time, either by yourself or with a trusted non-work person.If your boss is the problem, the politics get a little more difficult. You can speak with HR or your boss’s boss if you’re concerned about direct confrontation, but understand that the information could get back to your boss, and make things extra uncomfortable. If things are that bumpy and contentious with your own boss, it may be time to leave.You can also try some remedies on your own, without involving your manager or HR. Sometimes trying harder to approach your job with a positive and more receptive attitude can help ease things a bit, at least in the short term. Personally, I know that when Ià ¢â‚¬â„¢m already grumpy, things just kind of spiral down from there- but when I make a conscious effort to say, â€Å"Okay, maybe I’m overreacting and need to try this from a different direction,† things seem less dire. Bottom line: you know yourself and your professional goals better than anyone, so only you can decide whether these short-term fixes will hold, or whether things will backslide in a matter of weeks.I Think I Need to Quit.Issues that are unlikely to resolve themselves include:You lack passion for your job, with no exciting prospects on the immediate horizon.You have skills and experience that are going to waste.Your compensation is way under what other people in similar positions make, and your company won’t be able to close that gap any time soon.The company itself is failing, and everyone’s starting to get a TitanicYou’re being verbally abused or sexually harassed at work.You have no work-life balance, or it’s getting steadi ly worse.Your boredom or malaise has led to decreased performance.Your work stress is making you physically ill.You’re no longer learning anything new at your job.If any of these are your issue, and there’s no immediate solution that you can see, it’s time to move forward with an exit plan.Okay, I Do Want to Quit. Now What?Don’t draft your resignation just yet. Give your decision some time to marinate. That can help you work out any last â€Å"is it me or the job?† kinks, and decide definitively that you’re ready to let go. At this stage, you also have to think about what quitting means.Do you have another job offer lined up?And if so, does it address the issues you have with your current job?If you don’t have another offer yet, are you prepared to be adrift in the job market for a while?It’s best to have an offer in hand before you quit, but that’s not always going to be possible. If you’re quitting because of on e of the dealbreakers mentioned above (especially being stuck with verbal or sexual harassment), you may decide that you just can’t continue on in your current job for the average six months it could take to find a new job. If you go this route, try to shore up your financial resources as much as you can before you hand in your resignation. Most experts recommend having at least six months in savings if you’re planning to quit your job without a Plan B.RELATED:  How to Quit Your Job Professionally If you don’t have an offer yet, you can still do some short-term maneuvers to help set yourself up for your next opportunity.Start reaching out to your network. Let them know you’re looking (discreetly, if you haven’t yet handed in your resignation).Clean up your social media accounts, and get them ready for professional strangers to be peeking in.Revamp your resume.Start hitting job boards hard, and using industry-specific resources online.While coming up with your post-quitting career plan, you should also be thinking about your last few weeks at work. You’ll need to give notice- at least two weeks, but your company may require more, so be sure to double-check company policy. You will also need to decide whether you’ll be available for transition training and any final requests your boss might have as you get ready to go. It’s important to be courteous and professional at every step here, no matter how fed up you may feel. Even if you already have a new job offer in hand, you don’t want to burn bridges on your way out. It’s much better to leave with your professional rep intact. It can really help minimize regrets later on.Whether you’re feeling temporary job blues or you really need to get out and move on, the important piece is that you put the time and effort into diagnosing the problems and coming up with long- and short-term plans to make sure that you’re not hurting yourself by acting too rashly, or by giving in to inertia and staying in a bad situation too long. Sometimes quitting is the hardest and most rewarding decision you can make for your career, but you want to make sure it’s the exact right call for you at the time.

To study the feasibility and profitability of establishing an Essay

To study the feasibility and profitability of establishing an international school in Mainland China - Essay Example Reed (l988) in her study of Education in the People's Republic of China and U.S underscored the importance of having international schools in China to cater for educational requirements of children of expatriate parents working in the country. Similarly, Fuldien (as cited in Hammond, 2007) demonstrated how the presence of English Schools Foundation (ESF) in Hong Kong has contributed to the education sector by providing high quality and cost-effective education through the use of English as the medium of instruction. This chapter presents review of the literature of studies done on the feasibility and profitability of establishing an international school in the emerging cities in Mainland China. The chapter is divided into various headings for easier presentation of the literature review. The Chinese education system is lauded as one having the longest history in the world. Available documented evidence indicates that the Chinese practice of education developed from the imperial civil examination system introduced in the early 7th century (as cited in Feagles, 1999). This type of examination system was devised exclusively as a mechanism for choosing and enlisting aspirants for the official system of government of the time and was found to identify only worthiness, competition and valor. Paver and Wang (1992) explain that this instrument was considered a powerful tool built upon social ambitions rather than individual concerns and therefore made examinations the only gauge for future success and achievement. This system has been found to strongly influence the education systems of Chinese communities to date, while still emphasizing the educational values highly esteemed by both parents and students (Paver and Wang, 1992). Reed (l988) in her study reported that the Chinese education system is found to be a mixture of two cultures namely the Chinese culture and the British culture. She maintains that the British culture is responsible for the establishment of elite schools. These elite schools are accordingly sponsored and managed by the major religious bodies such as the Roman Catholic Church, the Anglican Church, the Church of Christ in China and the Methodist Church (all cited in Reed, l988). Moreover, the regal social examination system laid down in the 7th century has inculcated certain values in the Chinese people which are seen to strongly influence the nature almost all the local schools and the elite schools in Hong Kong. Available studies further argue that this culture inculcated by the system have been responsible to produce all round students and graduates in the world (Kennedy, l977). The consequence of this argument is demonstrated in global comparisons of student achievements. Aanenson ( 1979) illustrates that Chinese students mainly from Hong Kong are always positioned amongst the top. Apart from fostering the spirit of hard-work and competitiveness, the Chinese tradition also underscores the importance of moral education which very much differs from the concept of morality as perceived in the Western countries (Reed, l988). The concept of moral education as recognized by the Chinese puts into account virtually all characteristics of education including but not exhaustively ethics,

SMB team on-demand CRM comparison guide by Ziff Davis Essay

SMB team on-demand CRM comparison guide by Ziff Davis - Essay Example The products can also be applied for single use or for departmental use. Each product also has a different pricing basis that ranges in price, duration of license and number of users per license. The products’ mode of sale, year of development, and ownership are also diversified. They however serve a wide customer base in the global market (Davis, p. 1).The reported Customer Relationship Management products also have differentiated features. The products’ specifications such as versions are for example distinct for each product. Similarly, the products functions are diversified and include â€Å"sales, marketing, service, workflow, system customization, offline synchronization, customer service, reporting and inventory management† functions that are either singly or jointly applicable (Davis, p. 2). The products are also identified with special features that apply to some of the functionalities. Such functions are sales, marketing.The content of the paper â€Å" SMB team on-demand CRM comparison guide by Ziff Davis† is relevant and valuable to my project that seeks to recommend application of Customer Relationship Management to Macy’s enterprises. This is because it identifies features of different Customer Relationship Management products, their functions that identify the products’ benefits, and features of every product towards its functions. It therefore helps with information that supports my project’s recommendation of a specific product to Macy’s Inc.

Get Prepared My Speech Essay Example for Free

Get Prepared My Speech Essay Regarding our introduction speech as my first formal one in front of the class, I felt so awkward that I forgot every details which we should pay attention to. First is the Eye Contact. There was a kind of hook that I can’t control myself from moving my sights out of the back row, where our professor sat. The second Delivery part is Vocal Pause which was my most serious issue during all the speech. Words just went out of my mind since I wrote my name on the board. I was a little unaware when my name was called on the second because I preferred the third place so that I got enough time to calm down and organized sentences. Every preparation I did was showing randomly in my head. For example, my personal considerations on how tough will a military mission be had appeared first rather than an interesting getter. Some details I added to make a rich description became a simple word, not including some parts I even forgot to say. The last issue is about Body language that it may help audiences to know where the person in the speech is. Thanked for the outlines paper so that I knew where I should put my hands on. I was easily lost my minds but caught up on time by fingering which line I would read next. By recollecting fragments of my speech, I keep telling myself it would be better if I performed in that way. An interesting beginning, more eye contacts or less pause while I was expressing. All the problems I mentioned above is because I didn’t realize there was more nervousness than I expected. In another words, I didn’t rehearse enough to conquer that as Ronald B. and George states, â€Å"A smooth and natural delivery is the result of extensive practice. Get to know your material until you feel comfortable with your presentation† (page 342). After switched to a listener, contents were not the only part that attracted me but how different they performed from mine. By observing their moves, their body languages were perfectly coordinated with the rhythm of presentations. It became a talk like he or she was introducing a friend of his or her to you instead of reading a research paper. About the cadence they spoke, the variable tone caught my attention all the time and I couldn’t wait to know what was on the next. I confessed that I am the selective listener who responds only to the parts of a speaker’s remarks that interested me. With those changing tones and plentiful body languages, the contents were easily understood and appealing. I am very pleased to be enrolled in this class to figure out what is my weakness and how I can beat them to be a qualified speaker. Works Citied Adler, Ronald B. and Rodman, George. Understanding Human Communication with Carrie Cropley Hutchinson, 11th edition. Print.

Free College Essays - Change of Characters in Shakespeares Othello :: GCSE Coursework Shakespeare Othello

Change of Characters in Othello Othello's character during the play is first shown as a hero of war and a man of great pride and courage. The other main characters in the play all form their own opinions of him and as the play continues, his character begins to deteriorate and become less noble. Chronologically through the play Othello's character changes from a flawless military leader, to become a murderer. Also as the play progresses, the other characters in the play change their opinions of Othello which causes the plot to happen the way it did. Throughout the first act of the play, Othello was shown as many different characters depending on who was speaking. Iago complains of Othello's pride and "bombast circumstance" and is angered by the appointment of Cassio, and educated military theoretician of Florence to lieutenant, instead of himself. Although he knows Othello is a proud man, his open and trusting nature in the beginning of the play will be eroded by the conclusion of the plot. As Iago is spe aking to Brabantio about Othello, he uses the term "white ewe" to represent Desdemona, and "black ram" when referring to Othello. By using these terms, it shows that he is trying to give a bad impression of Othello when he is speaking to the royal family in Venice, because Othello is a Moor or a Negro. Iago shows his black hatred for the Moor, and his jealousy of Cassio in his first soliloquy and also reveals his evil intentions. As the act continues and Othello is being searched for by a group of people, Iago attempts to incite Othello into anger against Brabantio, but Othello does not take the bait. He feels that he (Brabantio) may do his worst because Othello is assured that his military services to the government will outweigh Brabantio's complaints of him marrying Desdemona. These answers to Iago's persistence show that he is still a character of calmness and dignity, and he still has the self-assurance suitable to command armies of men. When Othello is foun d by Cassio, he seems to be relieved because he does not like personal conflict, which would have occurred if Brabantio had found him instead. After he is found, Othello is taken to Brabantio where he is interrogated on how he possessed Desdemona enough in order to make her run off with him.

Safety Measures In Ships

Titanic making was completed around 1907. The enormous ship captured attention globally due to its complexity. From the remains that were found on the wreck ground it was observed that the ship had Artistic completely nurtured, three-dimensional features and objects, witnesses say that the Titanic was more than describable, in fact the right phrase applicable would be, beyond words and pictures. Unfortunately, the Titanic met with a fatal disaster in 1912. Titanic’s story has been narrated and re-narrated. Although it sank and got destroyed, the Titanic remains a great historical source of legendary and curiosity (Young 1912). To start the comparisons between safety measures in place then at the ones put in today it sounds appropriate to ask our selves, why does it take for a disaster to happen, to change policies, strategies or laws and regulations in regard to safety precautions. Since that accident, ship owners and authorities have pushed for further measures to be installed in all major cargo and passenger ships ( Paine ,1919). To begin with, let us scrutinize safety measures in the Titanic by looking at the materials that had been used in its construction. From the wrecks, it is seen that the Titanic was made of steel plates that had been joined by iron rivets. A comprehensive survey indicated that the pieces of steel plating of this ship seemed to have metallurgy lose of elasticity which highly facilitated Titanic’s brittleness in water, due to this reaction; the Titanic was left vulnerable to total indention and rupture (Winzy. com 2008). Further analysis found out that the steel had higher phosphorus and sulfur contents. Higher amounts of the latter are said to result to fractures and likelihood of cracks respectively. Research also noted that the steel lacked in manganese and this in turn might have caused the ship’s to loose on ductility (Eye witness to History. com, 1912). This might have been one area that the manufactures of the Titanic failed. Although innovation and technology had not developed as such, it is likely or rather apparent that these firm could have used better quality material had they known. The content of these constituent minerals in the main steel have been checked. Only high quality steel with less of these chemical content is used only now as a safety precaution. Another most likely defect or amiss in Titanic’s making could be the riveting concept applied (Lawrence 1929). Investigations say that they were more fragile than expected. Slag residues found in them again could have led to the ship’s breakdown at that rate. In new ship building industries today only the best quality of rivet material is used. The number of rivets holding the steel plates together probably might have been smaller which in turn made the fracturing of the legendary Titanic even faster. Although, the building process might have seen small mishaps and setbacks, I believe more could have been done if proper studies and research had been done. Reports later on alleged that the ship building company had shortages in skilled and highly competent riveters. Mostly the riveting was carried out by hand, another aspect that might have jeopardized Titanic’s safety (Titanic Facts, 2008). However, the scene today has completely changed and everything is now mechanized: from the initial processes to the finished product. Today’s rivets are steel made which is contrast to earlier iron ones. Evidently, steel is stronger than iron which convinces of a compact and strong structure. Next point to be considered is the electronically of the Titanic as an effort towards ensuring safety, the radar in particular. Although investigations indicate that the radar was not too small, for the Titanic’s size, it design had less to be proud of or even to be associated with. In relation to Titanic’s size there were other bigger radars in comparatively average sized ships. Scrutinizing this citation, the radars capability to view far distance was lower. This could be given as the reason why the captain and his crew members might have seen the iceberg that caused Titanic her life. With advancement in technology, the extent to which radar power has gone is indeed tremendous. Their ability and scale of efficiency is even further boosted by satellite installations in today’s ships. Recently made radars can view ship obstacle from a very long distance and with satellite signals facilitating warning in good time. Moreover, in Titanic’s manufacture, the builders might have minimally concentrated on or given little thinking about how the ship, of eight hundred and fifty two feet in length could make a turning incase of an emergency or particularly to avoid collision. Perhaps in addition, the most deadly occurrence to Titanic’s design might have been her screw engine arrangement which was in a triple configuration. Also constituent were reciprocating engines run by steam which in turn drove the propellers. A turbine ran her middle propeller. Problem seen was that the reciprocating engines were reversible while the turbine was not. It is also apparent that, when Titanic’s First Officer, ordered for a reverse to the engines so as to avoid hitting or colliding with the iceberg, he handicapped or better said sabotaged the ship’s turning ability( Cynthia, 1996). This resulted to a halt simply because; the centre turbine could not reverse as the ship was cruising at full speed. In fact, the lock hampered the ship’s tendency to maneuver. This century has seen a lot of developments put into ensuring that the engines perform at maximum potential at all times. Ships of the moment have propellers that move in all directions. Titanic’s failure seems to have sent a lesson that fortunately appears to have been well learned. That fatal tragedy served as an eye opener (Robertson, 1991). Further more facing the fact that the middle propeller had been placed in front of the rudder, its effectiveness seems to have been cut down. Compared to Canard or Lusitanian rudder design, Titanic’s was just a fraction of their size. This could have hampered its functioning. Those could have been the technical aspect of safety that lacked. Looking at the physical safety precautions, the magnitude of the disaster might have increased due to the outgrown or rather rotted lifebelts that did not work. Today safety belts are changed regularly and checked to ensure that they are functioning properly. The life boats also had little to help even though they presented a safety assurance. To dissatisfaction, these too did not function successfully (Blackwell, 1912). It was evident that they carried fewer people than they were supposed to. As a result, many people out of fear, panicked and disorder took centre stage. Saving became even harder due to commotion and distress. The fire equipment was faulty and unmanaged and the crew in control acted lazily. The obvious reason of course that badly impacted on the Titanic was that they had never encountered a fire drill before. Critics though feel that the owners of the ship and their policies caused the worst to happen (Mow bray, 1912). They particularly think that these owners were interested only in making profits at the expense of safety and even the priceless human life. Passengers more often were asked to sign warranties that indicate they were at own risk. So, this forced a large number of them aboard to even jump out of the wrecking ship. It was dangerous trying it but worth than just waiting for the unexpected. From the safety equipments to the team, there was a shortage and redundancy to reaction immediately the Titanic’s hull hit the iceberg. The nature of compartments made it impossible for passengers to quickly access the exit. Overconfidence is another aspect that negatively affected their safety reaction. There was belief that nothing could even destroy the Titanic (Lord, 1956). In the happening of the accident, it seems that safety courses had not been established and reading of signs not upgraded or even widely known among the water means users. A lot ought to have been done; the California ship nearby, could have helped but they rather turned off their wireless since they did not know the meaning of the lamp signal. Comparing with water transport today, the industry has grown very much in deed. Sinking and wrecking of the Titanic is a factor that led to a follow up of what the maritime body has achieved. It is now eminent that practices, sea traditions and culture, and design of ship building have been considered to correct the fault done earlier. Among the changes established initiated include; the International Ice Patrol to check out and clear existing and forming icebergs, new rules and regulations on lifeboats and safety belts and the twenty four hour surveillance on passenger ships. Today, the stability of ships afloat has improved, the longer it can float in the wake of an accidence the easier it gets for successful rescue and evacuation. Ship operators just put roll-on-roll-off ferries. In addition vessels must be compliant to regulations under voyage issues. Shipping companies have gone even further to catering for personal safety in ships today. With other safety fears emerging like hijacking and terrorism, security to ensure safety has been beefed up-thousands of people in America sail onboard everyday, the ships could be targeted by terror groups. In bids to ensure that this does not happen, the United States in conjunction with United Nations have imposed very strict and straight forward maritime regulations, policies and laws(George ,2008). This are meant to protect the passengers onboard. United States has created the Maritime Transportation Security Act (MTSA) and the International Ship and Facility Security code (ISPS) which are part of the International Maritime Organization (IMO) which is in turn a constituent of United Nation (US coastguard, 2008). The International Council of Cruise Lines (ICCL) indicates that the regulations on security laws require ships, governments and port facilities to access or acquire formal screening measures, security plans, waterside rescue equipment and effective communication in existence between the ports and the ships. The measures are meant to ensure safety of passengers from terrorist attacks in the middle of the sea or at the port. Other measures categorically focus on mechanical and reaction to fire problems. Rabaska, 2008) The IMO has taken the mandatory to step in and consult in terms of ship design, operation and construction. The Safety of Life at Sea (SOLAS) which was initiated after the destruction of the Titanic in 1914 has today been updated over time. The resultant is drastic changes in ship building and technological aspects of the latter. ( Cox ,2003) SOLAS is concerned with matters in regard to ship water tightness, communicational links, navigation capability, fire prevention, l ife-saving techniques and transport of people, cargo and dangerous goods. Ship crews are now trained on how to respond incase of an emergency. Apart from numerous regular serviced lifeboats, life-jackets are also in plenty to assist persons incase they are forced to swim. (US coastguard 2008)Most recommendable efforts though have seen ship personal safety pushed to further scrutiny of personal health. Due to rising cases of noro-virus, ships have actively played their role on carried out sanitation programs. Despite its efforts, the ship personnel is not always competent in effort towards controlling codes of behavior and so, it has emphasized to its passengers on trying to concentrate on their personal hygiene. Another thing that ships have done is the installation of security cameras. These surveillance gadgets monitor all ship compartments and if any passenger is found violating given rules they are penalized. Even after all these measures have been put in place and guarantees convinced on safety, the growing rise in sexual assaults and disappearing of passengers has become worrying. In fact, complains have seen The International Cruise Victims Organization (ICVO) experience hardships in trying to curb the menace (Silverstein, 2006). The organ though alleges that ship firms are not accountable and regulated. It says that they are not committed to protecting their passengers. Lastly, activism and lobby groups have pushed for reforms that concern insurance and compensation. They feel that all passengers onboard any vessel should be on the ship’s policy and are entitled to compensation incase of a disaster.

Resistance coursework Essay

My Investigation: I choose to do a nichrome wire because during my preliminary work nichrome shows more resistance compared to nickel and copper wire. This is because the electrons collide with the material of the nichrome wire. Measurements: The things I will have to measure are: the volts and amps and on each interval I take to take readings. I will have to take 5 reading of each volts and amps, so I can work out the resistance, and then I will have 5 resistance readings, from this I will work out an average resistance. Also I will be measuring the wire from 100cm down to 10cm. Diagram: This is how I will set up my circuit: There are particular factors that we have to keep the same in order not to alter the correct results.   Do not alter the positions of the devices during the experiment.   Make sure the total length of wire is exactly 1m.   Record the current and voltage accurately, using the correct units. Always place the crocodile clips on the right measurement.   Before you start the experiment, test the devices being used. If any are faulty, change them.   Leave the power pack set at the same voltage for the whole of the experiment. The surrounding room temperature must be kept, otherwise the particles in the wire will move faster (if the temperature increases). Therefore, this will have an effect on the resistance.   The wire along the metre ruler must be straight and exactly 1m long. Bends in the wire may affect the resistance. The reading of the voltage should be taken promptly after the circuit is connected. This because as soon as a current is put through the wire, it will get hotter. I want to test the nichrome wire when heat is affecting it the least. Safety: This experiment is not too dangerous but it could be if not handled with caution and care. Make sure that the electricity is off at the plug socket when connecting and altering the circuit.   Be careful of any sharp edges on the crocodile clips or on the wire cutters or on the wire once cut. If you cut your self make sure you wash the wound and see a medical nurse if needed. If a fire breaks out switch off the power and use a near by fire extinguisher that is not H2O (because of the electricity) to safely stop the fire.   Make sure the coils in the resistance wire don’t touch and short circuit because this will ruin the experiment and may heat up the wire and catch fire. Do not set the power pack voltage to more than 2V. This is a safety hazard.   If you smell burning, promptly switch off the power pack from the mains.   Make sure that when the power pack is switched on, the near by taps are switched off. If there is any water spilt near by the sockets or surrounding areas, wipe it before you start the experiment.   Make sure the power pack cable or the conducting wires aren’t frayed. Reliability and Accuracy: Reliability: I can rely on my results because I have taken 5 different readings and then taken an average. This is so if one of my results goes wrong then I have four other ones to compare it with so I know if a result is abnormal. I am using an Ammeter to get an accurate current reading and not relying on the approximate readings on the power packs variable controls. Accuracy: I will coil the wire so that there are no short circuits in the wire. I will do this by spacing out the coils and checking it regularly throughout the experiment. This is because if the wire does short-circuit then you will be measuring the resistance of the length of that short-circuited piece of wire and not the whole length of wire. I will also take the reading on the voltmeter as soon as possible so the heat does not affect the resistance. Obtaining My Evidence: During the investigation, I changed the length of the wire by 10cm to see if it affects the resistance and the amount of current I was going to use. Initially I had decided to use 2 amps but I changed it to 1 amp because I felt by using a low current I may not get a very good reading voltage and resistance. The Analysis: Explanation of results- As the length of wire increased, the current decreased. As the length of constantan wire increased, so did voltage. Resistance increased as the length of wire did. The longer the length of the wire, the higher the resistance because of the amps. The current flowing the p. d. across it providing the temperature is constant. V=Ii R or I=V/R or R=V/I From the graph which I have produces I conclude that the higher the length of the wire the higher the resistance. The thin wire in 1 amp tends to resist the movement of electrons init. We say that the wire has a certain resistance to the current. The greater the resistance the more voltage is needed to push the current through the wire. The resistance is calculated by Resistance-P. d across the wire/Current through the wire (1) I conclude that as the length of a wire doubles, the resistance also doubles (provided the thickness of the wire is kept constant0. I also conclude that as the cross-sectional area of the wire doubles; the resistance halves (provided the length of the wire stays constant. I conclude this because my graph shows that resistance is inversely proportional to 1 (thickness2) so the theories behind these conclusions are: As the length doubles the resistance doubles. Resistance is caused by electrons bumping into ions. If the length of the wire doubles, the electrons bump into the ions twice as much so the resistance will double. In my investigation I found out that as the length of the wire increased the resistance and voltage increased as well. The only thing that decreased was the current. I think this because the resistance and the voltage has no longer a distance to travel so more volts/amps are needed where as the current has a shorter distance to travel each time so as the same amount of amps are being used they are building up more. From the graph that I have done, I have found a pattern. This pattern draws me to a conclusion that the higher the length of the wire the higher the resistance. I had also stated this in my prediction, in the earlier stages of my experiment, so this means that my prediction was correct. The thin wire I (amps) a lamp tends to resist the movement of electrons in it we say that the wire has a certain amount of resistance to the current. The greater the resistance the more voltage is needed to push a current through the wire. The Ohms law calculates the resistance of a wire by: Resistance (R) = potential difference across the wire (V) Current through the wire (I) There is a resistance in a wire because the electrons bump in to each other in the nichrome wire. So the high resistance is because of the high length of the wire and because of the electrons bumping in the wire. My predictions match my results because I predicted that resistance would increase as the length of the wire increased and that is what happened. I worked it out by using my head. I started to think about this experiment then I thought that the current would have a longer distance as the length increased and that would make the resistance longer. I also found out that the resistance of one amp carries a current of one amp if there is a potential difference of one volt across it. Judging from my results, I can safely say that the majority of my prediction was right. The resistance did change in proportion to the length of wire. This is because as the length of wire increased, the electrons that made up the current had to travel through more of the fixed particles in the wire causing more collisions and therefore, a higher resistance. A thinner wire also means more resistance. Resistance is known to be inversely proportional to the cross- sectional area (diameter). I. e. if the diameter is increased, the resistance decreases. A wider wire means less chance of the free electrons having collisions into atoms and losing energy. Another point of my prediction was that as the length of wire doubles so does the resistance. This proved to be true. I can show this in my graph. The straight line indicates it. I can also see these in my results. E. g. 30cm=0. 95? and 40cm=1. 124 ?. The theories behind these conclusions are: As the length of the wire doubles, the resistance also two folds. Resistance is caused by electrons bumping in to ions. If the length of the wire doubles, the electrons bump into the ions twice as much so the resistance will double. I also want to state the fact that as the length of a wire doubles the resistance also doubles, however providing the thickness of the wire is kept constant. I conclude that, as the cross sectional area of the wire doubles the resistance halves providing the length of the wire stays constant. Evaluating my Evidence: I believe I carried out my investigation very well. I used all the equipment I was supposed to. I set the experiment correctly. Most of my results are accurate. I managed to get reading off both the volt meter and ammeter for each length five times and I used the correct safety precautions. I believe most of my results are accurate. Not all of the readings are correct as at the end the wire got very warm and gave faulty readings. After studying my results, I realise there is one anomalous result. It occurs in the voltage on the sixth voltage. It looks as if the volt meter had some interruptions such as the heat of the wire or the heat of the surrounding area. However this did not affect my predictions as I predicted the longer the wire the higher the resistance and this is what had happened but it had less resistance for that particular one than I had expected. It did not alter the increasing pattern in resistance. I believed that my investigation and the results are mainly accurate because my investigation was carried out very well. I believe that if I had to use my results as evidence I think they show that the longer the nichrome wire the more resistance and the shorter the less. I assume this because my graph shows at 10cm of nichrome wire there is 0. 592(ohms) and at 100cm of nichrome wire there is 2. 386(ohms) there is a difference of 1. 794(ohms) which proves longer the wire the more resistance. I can prove that my experiment was successful because of the graph I drew. It showed length of wire against resistance. If I had to further improve my investigation I would carry it out again and I would do it with a much longer piece of wire at a higher current. If I had to do this experiment again I will probably measure the wire every 5cm’s instead of 10cm’s to make sure it’s accurate and use a more accurate volt meter to get the best and accurate results. . I could also investigate how the diameter of a wire affects the resistance. An extra investigation I can carry out or perform to receive more proof and evidence would be to investigate and look into is the thickness of a wire and evaluate or match up with the length of the wire. Also I could examine if the specific metal materials or properties makes a change in the resistance. Show preview only The above preview is unformatted text This student written piece of work is one of many that can be found in our GCSE Electricity and Magnetism section.

Formation of the Delian League in Ancient History

Formation of the Delian League in Ancient History Several Ionian cities joined together in the Delian League  for mutual protection against the Persians. They placed Athens at the head (as hegemon) because of her naval supremacy. This free confederation (symmachia) of autonomous cities, founded in 478 B.C., consisted of representatives, an admiral, and treasurers appointed by Athens. It was called the Delian League because its treasury was located at  Delos. History Formed in 478 B.C., the Delian League was an alliance of mainly coastal and Aegean city-states against Persia at a time when Greece feared Persia might attack again. Its goal was to make Persia pay and to free the Greeks under Persian dominion. The league morphed into the Athenian Empire that opposed the Spartan allies in the Peloponnesian War. After the Persian Wars, which included Xerxes invasion by land at the Battle of Thermopylae (the setting for the graphic novel-based movie ), the various Hellenic poleis (city-states) divided into opposing sides ranged around Athens and Sparta, and fought the Peloponnesian War. This enervating war was a major turning point in Greek history since in the following century, the city-states were no longer strong enough to stand up to the Macedonians under Philip and his son Alexander the Great. These Macedonians adopted one of the aims of the Delian League: to make Persia pay. Strength is what the poleis had been seeking when they turned to Athens to form the Delian League. Mutual Protection Following Hellenic victory at the Battle of Salamis, during the Persian Wars, Ionian cities joined together in the Delian League for mutual protection. The league was meant to be offensive as well as defensive: to have the same friends and enemies (typical terms for an alliance formed for this dual purpose [Larsen]), with secession forbidden. The member poleis placed Athens at the head (hegemon) because of her naval supremacy. Many of the Greek cities were annoyed with the tyrannical behavior of the Spartan commander Pausanias, who had been leader of the Greeks during the Persian War. Thucydides Book 1.96 on the formation of the Delian League 96. When the Athenians had thus gotten the command by the confederates own accord for the hatred they bare to Pausanias, they then set down an order which cities should contribute money for this war against the barbarians, and which galleys. For they pretended to repair the injuries they had suffered by laying waste the territories of the king. [2] And then first came up amongst the Athenians the office of treasurers of Greece, who were receivers of the tribute, for so they called this money contributed. And the first tribute that was taxed came to four hundred and sixty talents. The treasury was at Delos, and their meetings were kept there in the temple. Members of the Delian League In The Outbreak of the Peloponnesian War (1989), author-historian Donald Kagan says the members included about 20 members from the Greek islands, 36 Ionian city-states, 35 from the Hellespont, 24 from around Caria, and 33 from around Thrace, making it primarily an organization of the Aegean islands and coast. This free confederation (symmachia) of autonomous cities, consisted of representatives, an admiral, and financial officers/treasurers (hellenotamiai) appointed by Athens. It was called the Delian League because its treasury was located at Delos. An Athenian leader, Aristides, initially assessed the allies in the Delian League 460 talents, probably annually [Rhodes] (there is some question about the amount and people assessed [Larsen]), to be paid to the treasury, either in cash or warships (triremes). This assessment is referred to as phoros that which is brought or tribute. 23.5 Hence it was Aristeides who assessed the tributes of the allied states on the first occasion, two years after the naval battle of Salamis, in the archonship of Timosthenes, and who administered the oaths to the Ionians when they swore to have the same enemies and friends, ratifying their oaths by letting the lumps of iron sink to the bottom out at sea. - Aristotle Ath. Pol. 23.5 Athenian Supremacy For 10 years, the Delian League fought to rid Thrace and the Aegean of Persian strongholds and piracy. Athens, which continued to demand financial contributions or ships from its allies, even when fighting was no longer necessary, became more and more powerful as her allies became poorer and weaker. In 454, the treasury was moved to Athens. Animosity developed, but Athens would not permit the formerly free cities to secede. The enemies of Pericles were crying out how that the commonwealth of Athens had lost its reputation and was ill-spoken of abroad for removing the common treasure of the Greeks from the isle of Delos into their own custody; and how that their fairest excuse for so doing, namely, that they took it away for fear the barbarians should seize it, and on purpose to secure it in a safe place, this Pericles had made unavailable, and how that Greece cannot but resent it as an insufferable affront, and consider herself to be tyrannized over openly, when she sees the treasure, which was contributed by her upon a necessity for the war, wantonly lavished out by us upon our city, to gild her all over, and to adorn and set her forth, as it were some vain woman, hung round with precious stones and figures and temples, which cost a world of money. Pericles, on the other hand, informed the people, that they were in no way obliged to give any account of those moneys to their allies, so long as they maintained their defense, and kept off the barbarians from attacking them. - Plutarchs Life of Pericles The Peace of Callias, in 449, between Athens and Persia, put an end to the rationale for the Delian League, since there should have been peace, but Athens by then had a taste for power and the Persians started supporting the Spartans to Athens detriment [Flower]. End of the Delian League The Delian League was broken up when Sparta captured Athens in 404. This was a terrible time for many in Athens. The victors razed the great walls linking the city to her harbor city of Piraeus; Athens lose her colonies, and most of her navy, and then submitted to the reign of the Thirty Tyrants. An Athenian league was later revived in 378-7 to protect against Spartan aggression and survived until Philip II of Macedons victory at Chaeronea (in Boeotia, where Plutarch would later be born). Terms to Know hegemonia leadership.Hellenic Greek.Hellenotamiai treasurers, Athenian financial officers.Peloponnesian League modern term for the military alliance of the Lacedaemonians and their allies.symmachia a treaty where the signers agree to fight for one another. Sources Starr, Chester G. A History of the Ancient World. Oxford University Press, 1991.Kagan, Donald. The Outbreak of the Peloponnesian War. Cornell University Press, 2013.Holden, Hubert Ashton, Plutarchs Life of Perciles, Bolchazy-Carducci Publishers, 1895.Lewis, David Malcolm. The Cambridge Ancient History Volume 5: The Fifth Century BC., Boardman, John, Davies, J.K., Ostwald, M., Cambridge University Press, 1992.Larsen, J. A. O. â€Å"The Constitution and Original Purpose of the Delian League.† Harvard Studies in Classical Philology, vol. 51, 1940, p. 175.Sabin, Philip, International Relations in Greece, the Hellenistic World and the Rise of Rome, Hall, Jonathan M., Van Wees, Hans, Whitby, Michael, Cambridge University Press, 2007.Flower, Michael A. From Simonides to Isocrates: The Fifth-Century Origins of Fourth-Century Panhellenism, Classical Antiquity, Vol. 19, No. 1 (Apr. 2000), pp. 65-101.

How to Be More Punctual for School

How to Be More Punctual for School Do you seem to be late for school a lot? Do people tease you about it? Do your grades suffer because of it? Does your tardiness annoy your teacher? Being on time is so important for academic success! Learn to improve your reputation and your chances for academic success with these tips for being right on time - all the time! Tips for Punctuality Rethink the meaning of on time. People who are always on time are really people who arrive early every dayand acknowledge that things can go wrong to set them back several minutes. When things do go wrong these students arrive on time!Understand the importance of being on time. Students who are always on time are the people who earn the best grades, win scholarships, and get into great colleges. In the working world, the people who are always on time are the people who get promotions.Get enough sleep. If you have trouble getting out of bed in the morning, then make a serious effort to get to bed earlier. Sufficient sleep is essential for maximum brain function anyway, so you really dont want to ignore this aspect of your scholastic habits.Give yourself a realistic amount of time to dress and groom. You can do this with a simple exercise: Get up early one morning and time yourself (moving at a normal pace) to see how long it takes you to get ready. You may be surprised at the time it takes, especially if you find you have been trying to squeeze forty minutes worth of grooming into fifteen minutes each morning. You can try creating a time management clock. Know exactly when you need to be at your destination and subtract ten or fifteen minutes to establish your arrival time. This will give you time to go to the restroom or chat with friends. What time are you expected to be seated in your homeroom or your first class? If your class begins at 7:45, you should arrive at the school by 7:30 and be in your seat at 7:40.Be open to your teachers preferences. Does your teacher want you to be seated early? If your teacher wants you to be in class before the bell rings, then do so if its possible - even if you dont agree. Dont get angry and blame others if you arent meeting the teachers expectations. Why cause trouble for yourself?Communicate any problems. If your bus is always late or you have to take your little brother to school and it always makes you late, just explain this to your teacher.Listen to traffic news. If you depend on public transportation to get to school, always keep an eye on schedule interruptions.Have a backup plan for you r transportation. If you normally ride to school with a friend, think ahead and plan what to do if your friend gets sick. Set your clocks forward by ten minutes. This is a dirty little psychological trick that many people play on themselves. The funny thing is, it really works!

The Role of Marketing Essay Example | Topics and Well Written Essays - 4500 words

The Role of Marketing - Essay Example The intimate, and inextricable, connection between organisational success and marketing, insofar as the primary objective of the former is to ensure the latter through the creation and maximization of well-targeted demand, is a historically undeniable reality, amply supported by a wealth of empirical evidence (Church, 1999). The undeniable centrality of marketing communication to organisational success functioned as the basis for the embrace of marketing by academia and the evolution of marketing as an academic field within management sciences (Cohen, 1966). Earlier perceptions of marketing as interchangeable with advertising, with the former being defined simply as a strategy to attract consumer interest in a product, have fundamentally changed. Marketing has, ever since the mid-1960s, been recognized as a complex methodology for the fulfilment of an organization's strategic objectives, insofar as sales, the expansion of market shares, and organisational growth are concerned. As such, and within the context of the aforementioned definition for marketing, the former evolved into a science embracing methodologies for market analysis and study; strategies for the identification of the most susceptible consumer groups/target audience; and countless theories on effective communication strategies and tools f or the engendering of consumer interest and product/service demand (Cohen, 1966; Dibb and Simkin, 1994). In other words, the increasing recognition of marketing as the key to organisational success has led to its embrace by academia and its subsequent evolution into a science,' designed to articulate a set of strategies, tools and methodologies as would ensure organisational success through marketing. There is no doubt that recent technological innovations in communication sciences, bordering on the revolutionary, have significantly redefined marketing strategies and media. Marketing has not only expanded beyond the local to embrace the global but marketing media and strategies have undergone revolutionary transformations consequent to the evolution of variant forms of electronic media, from the radio to the internet (Wehner, 2001). Marketing, as a communications strategy designed to inform consumers of the availability of particular products and persuade the market of the utility of these products, has evolved into integrated marketing.'

Explain statistical power Essay Example | Topics and Well Written Essays - 250 words

Explain statistical power - Essay Example According to Ellis (71), statisticians conduct power analysis prior to experiments in order to anticipate the possibility of a study outlaying accurate results. The objective is estimating the effects of the larger sample size in relation to its significance on the study. The less the power, the higher the chances of the occurrence type II error and vice verse. The two possibilities results from the likeness of an error in data collection (Ellis 60). Consequently, statistical power is the retention of null with accuracy, hence the reason, researchers strive to attain more statistical power when conducting studies. The components that determine statistical powers in a research are the sample size, the effect size, the alpha level and the power. Sample size refers to the units available for the study. Alpha levels are the chances of possibilities. Power is the odd that will result from the treatment of the sample (Rubin 148). Lastly, effect size balances the strength of a research by eliminating errors in power analyses. Indeed, an analysis of the components prior to the collection of data is essential to facilitating accuracy in power