Unit 43 distinction Coursework Example | Topics and Well Written Essays - 250 words

Unit 43 distinction - Coursework Example There are several merits of using energy efficient devices, and this include saving of money. Studies have shown that improving the thermal characteristic of a home by buying the latest energy saving equipments easily save about 30% of the energy bills. A properly insulated house shall use less heating fuel and less electricity during summer for air conditioning. Other ways of reducing utility bill is by using CFL bulbs and other energy star appliances2. The energy efficient equipments help in improving the local economy. This can be achieved when the local and domestic companies provide energy efficient devices instead of importing electricity or natural gas from outside the community. By using the energy efficient devices, we help in reducing environmental pollution. The power plants that generate electricity use natural gas or burning oil thus causes air pollution and emission of greenhouse gases. Therefore, by consuming less energy it helps to lower the emission of pollutants in the air. Energy efficient devices will enhance less utilization of the available energy thus saving a lot of energies that can be exported. Exported power earn a lot of revenues to a country that can be vested in improving schools, hospital among others. Moreover, using energy efficient devices improves an individual comfort at home since it reduces expenditure needed to heat their homes to comfortable levels. Electrical energy can be utilized in a commercial building for different purposes including use in computer appliances, driving of lifts within the building as well as maintain the thermal characteristics. Electrical energy can be used to heat equipments to produce heat as well as running the air conditioner machines to bring in cold

Lending Situation paper Term Example | Topics and Well Written Essays - 750 words

Lending Situation - Term Paper Example As it looks, the company is currently struggling in the market since the margins reflected in the last financial records show that it made a profit of only $275,000 the previous year. It is even more worrying to learn that there was a drop in the company’s revenues from the previous year (6,150,000 to 5,200,000); an indication that the company’s revenues have been declining over the years. It is also clear that this decline is majorly attributed to the fact that the company is still operating on the traditional old ways of print media while the current world is shifting to the digital media. Indications are that the company is competing with other major producers which give the company a stiff competition in the market. For the construction of the new plant to take place, it will need a duration of 12 months to be completed which is a long time since during this period there will be no increase in production and the company will therefore have to rely only on the already depreciating revenues from the old press. On the positive end, Mr. Harvey’s plan seems to be a well thought out investment to salvage the company from declining; it is a promising kind of investment since this is where the market trend is heading to. With the establishment of the new plant, he will be able to maintain and even increase company’s market share. This will tremendously increase the revenue base of the company. The company is well located in the suburbs where there is availability of labour required in the plant. An area of 150 miles is a large area dominated by the company and focusing on this market will give the company good revenue. It is also important to note that Mr. Harvey is not abandoning the printing altogether because there will always be a need for print media even with the shift in technology. This will provide continuous income to the company. As pointed out by Ahlers, print media in the form of books, magazines, newspapers will

Should People Make More of an Effort to Keep Things Private Essay Example for Free

Should People Make More of an Effort to Keep Things Private Essay People should make more of an effort to keep factors of their life private. For example when you see some people on Facebook updating about what they had for breakfast. I do not think we need to know that isnt them truly expressing themselves however that seems to be what they think they are doing. You shouldnt express yourself via the internet it should be what you do in certain situations and how you do it that express who you are. Today, many seem to not to want to keep some mystery about them. In addition, the internet does make this difficult as all you have to do is Google somebody and you can find out where they live, work, what their hobbies are and even who their family are. Initially, the fact you can find this information so easily is incredibly scary. Also it takes away the mystery of meeting someone and getting to know them when you can flick through their Facebook pictures and find out what they wore last Christmas. We expect people to respect our privacy but then we go and post all our details, this makes us hypocrites. I understand not everyone may do this but the majority do, if you post pictures on the internet, put your name and number anywhere you are giving away your privacy. Even the governments cannot respect our privacy. They put security cameras on every corner, in every building. Understandably they prevent and solve crimes but as a result it removes our privacy. Also, it is a huge factor in being a nanny state where we no longer have any privacy or the freedom to make decisions. They should respect our privacy and trust their people. However, should they respect our privacy if we think we have the right to know about their private lives? For example, we know all about Arnold Schwarzeneggers love child but should we be privy to this information it doesnt affect is ability to do his jobs. Also football players are a good example as many of them have affairs but it doesnt affect how they play. Why do we know intimate details of their life? Why do we feel we have the right to it? We wouldnt want everyone in our street knowing details like that let alone wanting it to be common knowledge internationally. We should respect their privacy as long as it does not affect how they act publicly. In conclusion, even though the media may not respect some individuals privacy and the governments may take ours as a bi-product of protecting us people should make more of an effort to keep some factors of their life private. As I said at the beginning people should retain some mystery and express themselves truly by what they do and how they do it. Yet, they may feel free to express themselves by telling us about their breakfast if it is a humorous anecdote or an interesting metaphor.

Underage Drinking Essay Example for Free

Underage Drinking Essay There are several problems caused by underage drinking; furthermore, this is a serious disease. Most teenagers have a greater record of underage drinking compared to young people 20 years ago. There are more accidents and deaths now as a result of underage alcohol consumption. Subsequently, we are for the banning of underage drinking. First of all, alcohol causes many problems for society nowadays. Alcohol has been used throughout history for various reasons. According to the medical Encyclopedia, alcoholism is an illness marked by drinking alcoholic beverages to excess. As long as alcohol consumption is not at a level that interferes with physical health, it is not a problem. There are two types of alcoholism: dependence and abuse; however, both of them could cause many problems in society. Alcoholism has a large effect in youth; there are more than 10. 4 million young people between ages 12 and 20 who suffer from it. Second, the difference between social drinking and alcohol has changed a lot over time. Now alcohol abuse has become teenagers’ focus. In addition, they don’t have control over how much they drink. They might want to attend social events that only involve alcohol, or they can’t enjoy themselves. Going to a bar or making a drink after coming home from work becomes more important than connecting with friends or family. These days, alcohol might be the way to avoid painful feelings or troubled relationships. As a result, teenagers might resort to dangerous behavior, like driving while drunk, or they may even exhibit violent behavior. Third, there are more accidents and deaths as a result of underage alcohol consumption. When people ask teenagers how easy it is to get alcohol, they mostly say it is very easy. As alcohol is easier to obtain, it produces more problems. Around 4,300 deaths are caused by teenagers who drink alcohol because they are more likely to have car accidents or fights. For example, according to the daily mail online, †Joseph Salah, 19, lost control of his car while he was driving drunk, crashing and killing David Powel, 20 years old, instantly and injuring two other passengers. Imagine a teen driving drunk without thinking about consequences, or messing around with someone who cannot control his or her behavior; it often results in a catastrophe. Finally, we disagree with underage alcohol consumption. Nevertheless, this issue causes a lot of arguments around the world. Society is affected by alcohol, but governments still allow it to be sold while banning other drugs. Alcohol companies produce millions of dollars annually in revenues and taxes; that’s why governments won’t do more to prevent underage alcohol consumption.

A Taxonomy Of Distributed Systems Information Technology Essay

A Taxonomy Of Distributed Systems Information Technology Essay The improvement technology nowadays and as the users of Internet grows extremendously, it has reached a point where the potential benefit of very large scale results distributed application more apparent than ever. Opportunities are emerging to develop large systems that cater to highly dynamic and mobile sets of participants, who desire to interact with each other and stores of online content in a robust manner. These opportunities will inevitably dictate a substantial body of research in the years to follow. Although applications intended to function at this scale have recently begun to appear, there remain a broad set of several issues that must be faced before this emerging class of distributed system can become a reality. One of the current issues in the distributes system is open problem based on taxonomy. 1. Introduction Distributed systems research has historically avoided many hard problems through the carefully calculated use of operating constraints. Scalable resource clusters are assumed to be tucked away in protected facilities and connected by reliable infrastructure [1]. Large systems are assumed to have cooperating nuclei of administrative organizations that do not fail [2]. In peer environments, participants are assumed to behave fairly instead of leaching resources [3]. As the specifications of these systems grow to require operation at a massive scale with highly distributed administration, these assumptions will be strongly challenged as a means of providing useful systems. In short, distributed systems research is quickly approaching a point at which many hard problems cannot be avoided any longer. Prior to embarking on the construction of a large-scale distributed operating system, we felt that it would be useful to survey the landscape of problems that will be faced in the constructio n of this class of system. This paper is a summary of open problem based on taxonomy that must be addressed in order for successful systems of this caliber to be realized. To describe the domain of existing and future distributed systems, we have to design a taxonomy. This model is a two-dimensional space whose axes define the concurrency and conflict of resource access, and the degree of distribution and mobility of resources within the system. From this model, we draw four phyla of application that is point-to-point, multiplexed, fragmented, and peer-to-peer. This last phylum defines our target domain and we apply lessons learned from the other three groups to it. Through our taxonomy, we describe a set of architectural systems problems that must be addressed. 2. A Taxonomy of Distributed Systems We will describe four phyla of distributed systems in a continuous space along two axes. The axe which is access concurrency and resource distribution is a stem from an examination of the evolution of distributed applications. Access concurrency considers the number of simultaneous accesses to a resource and the degree of conflict between these accesses. Access concurrency problems occur as researchers began to move towards time sharing on mainframes. Resource distribution represents how broadly a system is spread across a network infrastructure. Individually, each of these axes represents a steadily increasing gradient of complexity within system architecture. It is in the cases where both axes have high degree that system complexity explodes. Indeed, distributed applications seem to all reside very close to the axes in our models. This observation suggests that there must be some limiting factors that exist, inhibiting the development of complex systems. We now consider the two axe s and four phyla of systems individually. 2.1 Access Concurrency Access concurrency originated with the desire to allow users to share the resources of original mainframe computers. Concurrency mechanisms allow clients to share a resource while preserving the state of that resource during simultaneous accesses. It is worth nothing that without a requirement to avoid conflict, concurrency mechanisms need only act as stateless request multiplexers. Although there are complexity issues in simple multiplexing at the Internet scale, it is conflict avoidance that makes access concurrency especially hard. In order to avoid conflicts between concurrent accesses, extra mechanisms must be put in place. These mechanisms add overhead and complexity to the system. Mechanisms to support access concurrency involve tradeoffs between efficiency and effectiveness. Concurrency control techniques that are very efficient is aim to allow the highest possible amount of simultaneous access, but may do so at the cost of poorly preserving resource state or unfairly schedul ing this access. Techniques that are optimized for effectiveness protect resource state, but may do so by severely limiting concurrency of access. As an example, consider the locking of files to preserve consistency in concurrent systems. Pessimistic locking is most effective at preserving state, but results in a complete loss of concurrency whenever the file is locked for writing. Optimistic locking allows a higher degree of concurrency, but may perform worse in a high state of conflict as many transactions must be aborted. Conflicts may simply be flagged and left for a separate mechanism to resolve later. It is usually happen in the extreme case of efficient concurrency. This is how inconsistencies are addressed after a disconnection in distributed file systems such as Coda. Similar analogies for access concurrency exist with respect to other resources such as process scheduling and memory protection. In this emerging class of large distributed systems, the issue is that a high de gree of concurrency within a system demands efficiency, while individual users will expect effective consistency preservation. Measures, such as conflict resolution, have not been well explored. It is a non-trivial problem to automatically resolve conflicts on information that does not have a high degree of structure, such as files and ad hoc databases (i.e. the Windows registry). Additionally, there exist a set of resources for which resolution may not be appropriate after the fact, and large scale active conflict avoidance is a necessity. 2.2 Resource Distribution Resource distribution describes the degree to which a system has been spread across a network, and how dynamic resources are within it. Even the smallest degree of resource distribution mandates a substantial amount of overhead within a system. Consider the difference between accesses to a local file versus a remote file service such as NFS. Both cases contain all of the complexity involved in reading a file from disk; however the remote access has the additional responsibilities of locating the service, marshalling data in and out of message structures, interacting across the network, and handling a considerably larger set of potential error cases. Transparency, a hallmark goal of distributed systems only obfuscates this problem by concealing the details of distribution. Remote Procedure Calls (RPC) mechanisms, which were intended to simplify application development is forced distribution to be implemented deep within the system. This occurs directly in many of the problems traditio nally associated with distributed systems such as fragility and inflexibility. The troubling aspect in this line of consideration is that these issues indicate a fundamental flaw at the very onset of approaches to distribution. RPC will only provide one degree of distribution, by passing a call to a single remote host. We have only just entered the arena of distributed systems, and already complexity is overbearing with RPC. A larger problem exists in their distribution by assuming that resources can be accessed in an expressive and reliable manner. In order to access resources, it must be possible to first locate them. Moreover, mechanisms must exist to find them in an ongoing manner if the resources are not static within a system. For instance, the location of a resource may have to be determined through a directory service and refreshed with each successive access. In very large scale or highly dynamic systems, a centralized service may not be sufficient to track resource locatio n and other methods, such as forwarding pointers [4], may have to be employed. Distribution equates almost exactly to extra mechanism, and therefore complexity, within a system. The larger and more distributed a system becomes, the more mechanism will be required to locate, track, and access objects within it. 2.3 Four Phyla of Distributed Applications From the two axes described above, we draw four phyla of distributed applications, shown in Figure 2.3. Note that the respective sizes of these domains are by no means equal, we represent this division as it is for simplicity. What follows is a very brief presentation of each of the four classes. In each case, we supply an example of the phylum to demonstrate its characteristics. We also try to identify weaknesses that exist within the domain that may not be acceptable within more advanced systems. Figure 2.3 : Taxonomy of Distributed Application 2.3.1 Point-to-point The point-to-point phylum represents a very simple set of applications in which a client connects to a resource for un-shared access. Point-to-point examples exist primarily as components of more complex applications, for instance the data channel of an FTP session is point-to-point, in that all of the associated resources are allocated at both ends of the connection at the beginning of a transfer. We would also consider simple RPC to be primarily a point-to-point application, provided that the RPC server handles a single request at a time. Point-to-point applications are characterized by the fact that the distribution aspects of the system are typically quite visible. For example when failure does occur it can be identified and resolved primitively by the user. If an FTP server does not respond or crashes during a transfer, the user can attempt a connection somewhere else. Regarding to this problem it is clearly shows that this is not a good system property; however it is generally tolerable within the domain of simple applications. 2.3.2 Multiplexed Multiplexed applications are those in which resources are delivered with a high degree of concurrency, and possibly conflict control, over a relatively small scale of distribution. We can take file and web server as an excellent examples. It is because they provide a set of centralized resources to large number of concurrent users. Figure 2.3.2 show us the taxonomy of web server. Note that in our model, both file and web servers have a high degree of access concurrency, but are still barely distributed. This is because users typically need only connect to a single point to access resources. There are more distributed examples of multiplexed applications which are distributed striped file systems and scalable data structures [5]. In both of these cases, users may still connect to a single resource, but that resource may forward requests through an additional link to an appropriate secondary server. The risk of failure is more significant in multiplexed systems because failure has the potential to affect a much larger number of users on the resource provision side. A very large multiplexed service is often served by specialized hosting facilities where a very high degree of resource reliability may be assumed. It is commonly used to mitigate those problems. Further precautions may involve the installation of redundant resources that take over in the rare case of system failure. Figure 2.3.2: Taxonomy of web server 2.3.3 Fragmented Resource Fragmented systems are those in which resources are spread across, or move within, a set of connected endpoints. Communication is substantially more complex in these systems as messages may not travel directly to a resource, but instead may lead to a cascade of interactions across the system. Existing fragmented systems, such as the domain name service (DNS), are frequently structured as a hierarchy of coupled administrative domains. Note that there do not have many examples of highly fragmented systems. Considered as a whole, the global DNS database is fragmented across a considerable number of hosts. However this is doubtlessly orders of magnitude smaller than the scope desired by advocates of universal Internet-scale directory services, such as LDAP, which have yet to see broad acceptance within the network. The distribution of administration presents a difficulty within the ongoing provision of fragmented systems. In a centralized resource, a single administrative body is capable of quickly affecting changes across the scope of a system. In a fragmented resource, issues arise in how changes should be applied and who is allowed to do them. In the case of DNS, updates must frequently be submitted to human administrators, who authenticate and apply changes by hand. In existing systems this is an acceptable property, DNS lookups are handled with an acceptable degree of expedience, and the frequency of change is small enough typically to be handled off-line. This is not, however, an approach that provides a high degree of scalability. 2.3.4 Peer to peer The client-server model assumes that certain machines are better suited for providing certain services. For instance, a file server may be a system with a large amount of disk space and backup facilities. A peer-to-peer model (Figure 2.3.4) assumes that each machine has somewhat equivalent capabilities, that no machine is dedicated to serving others. An example of this is a collection of PCs in a small office or home. Networking allows people to access each otherà ¢Ã¢â€š ¬Ã¢â€ž ¢s files and send email but no machine is relegated to a specific set of services. Peer to peer applications are highly distributed and involve a high degree of potentially conflicting, concurrent access to resources. This is a fairly hypothetical description, as very few such applications currently exist at the Internet scale. Peer-based file sharing applications, such as Gnutella [6], are initial steps within this domain but only begin to enter the phylum. Gnutella does not need to address any conflict issues, nor has it proven able to scale. In this class of application, the acceptable weaknesses within the other phyla compound and cannot be avoided. Failure has a high potential impact, but resources cannot be protected. Administration is distributed and the coupling between administrative domains may become much more dynamic. We discuss these issues more extensively in the next section. Figure 2.3.4 3. Conclusion The purpose of this paper has been to identify open problem based on taxonomy that necessarily must be addressed in order to develop advanced, Internet-scale distributed systems. Regarding to the explanations above, we can highlight that the open problem in taxonomy that contains in access concurrency and resource distribution. We also must consider the four phyla of distributed system; point-to-point, multiplexed, fragmented resource and peer to peer to identify weaknesses that exist within the domain that may not be acceptable within more advanced systems. Projects to develop environments for ubiquitous, invisible, and pervasive distributed applications have, and continue to be, very exciting research that will need to address many of these issues in order to realize their visions.

Encouraging our Children to Read :: Reading Education, early education, elementary

Reading is widely labeled as a very important factor to reach fruition in education. The rising question is whether we should encourage our children to read whatever appeals to them. Personally, I firmly believe the good impact of reading to the children’s taste. To begin with, reading whatever they like help children feel more relaxed, fascinated and much more confident with reading - a most educated form of entertainments that is dying with the prevalence of other new mass media such as cable televisions, internets and so on. Reading has been proved to be very useful for children’s good performance at school and especially their life later as throughout the process of active reading their mother tongue language capacity in general is much more improved especially the communicative skills and social interaction manner. Secondly, if the children are encouraged to read whatever appeals to them, they are self motivated to read much more. Consequently, the more they read, the more they can widen their own knowledge about the world around them in an easy way and then the more perfect their personalities can be. For example, with children who spend lots of time reading interesting fairy tales, fables or history legends the moral lessons can be instilled naturally into their minds and will be remembered much longer as they are not as dry and dull as sentences like you should do this or you are not allowed to do that uttered by their parents day by day. Furthermore, being read to their likings can arouse the children’s sense of aspiration and exploration. The children’s imagination and creativity is lifted to a higher level as some children take their time reading exciting non-fiction books, detective stories or colorful cartoons. More tellingly, in this way both emotional thinking and logical thinking of the children are intensely provoked. And maybe in the future they will be excellent painters, imaginative writers or radical journalists. However, it is argued that if the children are free to choose what they read satisfying their curiosity it will be very dangerous. That is to say, children are obviously allowed or encouraged to approach bad source of information such as violence, sex and so on. Admittedly, by nature children are likely to be absorbed and imitated by things that are strange and attractive to them.

Thomas Kings All My Relations :: Essays Papers

Thomas King's All My Relations This is an anthology of writing by nineteen Native Canadian writers, which represents both an attempt to promote Native writing, and an effort to undermine commonly held misunderstandings. It is published by McClelland & Stewart, "The Canadian Publishers", which gives the collection a status of national and cultural importance, while indicating how these writers are working in and through Canada's hegemonic culture. This would seem to go some way towards undermining the book's claims to authenticity, but for the fact that King's stated purpose is much more complex than that. In fact, his introduction specifically considers the concept of the authentic, and is wary of what is potentially a highly limiting notion. Thus, the selection includes work that represents Natives in both traditional and contemporary roles and situations; and the format of the writing ranges from a transcription of an oral narrative to examples of conformity with the generic conventions of the Western short stor y. He is reluctant to constrain the possibilities for Native expression, but is ready to admit that the advent of a written culture with English as a shared language has allowed the various indiginous cultures to discover and explore areas of common belief and practice. Although King believes that it is too early in the history of Native publishing to be able precisely to delineate characteristic patterns, the two major themes which he cites as frequently recurring are those of community and the role of oral literature. He has included a short story of his own in the volume, "The One About Coyote Going West." Coyote is an example of the mythological "Trickster" character who often occurs in Native literature. King himself says "The trickster is an important figure for Native writers for it allows us to create a particular kind of world in which the Judeo-Christian concern with good and evil and order and disorder is replaced with the more Native concern for balance and harmony." (King, xiii) He relates the story in a colloquial, spoken style. Witness the opening lines: " This one is about Coyote. She was going west. Visiting her relations. That's what she said. You got to watch that one. Tricky one." (King, 95) As the story unfolds, the reading expe rience can seem strange for the non-Native. Characters change gender and identity, abstract nouns are blurred with concrete nouns, and the physical universe is represented as a radically unstable place.