Replica Synchronization in Distributed File System

Replica Synchronization in Distributed File System J.VINI Racheal ABSTRACT The Map Reduce framework provides a scalable model for large scale data intensive computing and fault tolerance. In this paper, we propose an algorithm to improve the I/O performance of the distributed file systems. The technique is used to reduce the communication bandwidth and increase the performance in the distributed file system. These challenges are addressed in the proposed algorithm by using adaptive replica synchronization. The adaptive replica synchronization among storage server consists of chunk list which holds the information about the relevant chunk. The proposed algorithm contributing to I/O data rate to write intensive workload. This experiments show the results to prove that the proposed algorithm show the good I/O performance with less synchronization applications. Index terms – Big data, distributed file system, Map Reduce, Adaptive replica synchronization INTRODUCTION The distributed environment which is used to improve the performance and system scalability in the file system known as distributed file system [1]. It consists of many I/O devices chunks of data file across the nodes. The client sends the request to the metadata server who manages all the whole system which gets the permission to access the file. The client will access the storage server which is corresponding to it, which handles the data management, to perform the real operation from the MDS The distributed file system of MDS which manages all the information about the chunk replicas and replica synchronization is triggered when any one of the replica has been updated [2]. When the data are updated in the file system the newly written data are stored in the disk which becomes the bottleneck. To solve this problem we are using the adaptive replica synchronization in the MDS MapReduce is which is the programming primitive , programmer can map the input set and obtaining the output and those output set send to the reducer to get the map output. In the MapReduce function it is written as the single node and it is synchronized by MapReduce framework [3]. In distributing programming models which perform the work of data splitting, synchronization and fault tolerance. MapReduce framework is the programming model which is associated with implementation for processing large data sets with distributed and parallel algorithm on a cluster of nodes. Hadoop MapReduce is a framework for developing applications which can process large amounts of data up to even multiple terabytes of data-sets in parallel on large clusters which includes thousands of commodity nodes in a highly fault tolerant and reliable manner. The input and the output of the MapReduce job are stored in Hadoop Distributed File System (HDFS). RELATED WORKS GPFS [4] which allocates the space for the multiple copies of data on the different storage server which supports the chunk replication and it writes the updates to all the location. GPFS keeps track of the file which been updated to the chunk replica to the primary storage server. Ceph[5] has replica synchronization similar ,the newly written data should be send to all the replicas which are stored in different storage server which is before responding to the client. Hadoop File System [6] the large data are spitted into different chunk and it is replicated and stored on storage servers, the copes of the any stripe are stored in the storage server and maintained by the MDS, so the replica synchronization are handled by the MDS, the process will be done when new data written on the replicas. In GFS [7], there are various chunk servers were the MDS manages the location and data layout. For the purpose of the reliability in the file system the chunk are replicated on multiple chunk ser vers; replica synchronization can be done in MDS. The Lustre file system [8], which is known for parallel file system, which has replication mechanism For better performance Mosa Store [9] which is a dynamic replication for the data reliability. By the application when one new data block is created, the block at one of the SSs is stored in the MosaStore client, and the MDS replicate the new block to the other SSs to avoid the bottleneck when the new data block is created. Replica synchronization is done in the MDS of MosaStore. The Gfarm file system [10] the replication mechanism is used for data replication for the reliability and availability. In the distributed and parallel file system, the MDS controls the data replication and send the data to the storage servers; this makes pressure to the MDS. Data replication which has the benefits to support for better data access was the data is required and provide data consistency. In the parallel file system [11], this improves the I/O throughput, data duration and availability by data replication. The proposed mechanism, according to the cost of analysis the data pattern are analysed a data replication is done, but replication synchronization is done in the MDS. In the PARTE file system, the metadata file parts can be replicated to the storage servers to improve the availability of metadata for high service [12]. In detail we can say that in the PARTE file system, the metadata file parts can be distributed and replicated to the corresponding metadata into chunks on the storage servers, the file system in the client which keeps the some request of the metadata which have been sent to the server. If the active MDS crashed for any reason, then these client backup request are used to do the work bu the standby MDS to restore the metadata which are lost during the crash. iii.PROPOSED SYSTEM OVERVIEW The adaptive replica synchronization mechanism is used to improve the I/O throughput, communication bandwidth and performance in the distributed file system. The MDS manages the information in the distributed file system which is split the large data into chunks replicas. The main aim of using the mechanism adaptive replica synchronization because the storage server cannot withstand the large amount of the concurrent read request to the specific replica, adaptive replica is triggered to the up to chunk data to the other related SSs in the hadoop distributed file system [13][5].The adaptive replica synchronization will be preformed to satisfy heavy concurrent reads when the access frequency to the target replica is greater than the predefined threshold. The adaptive replica synchronization mechanism among SSs intends to enhance the I/O subsystems performance. Fig 1: Architecture of replica synchronization mechanism A. Big data Preparation and Distributed data Storage Configure the storage server in distributed storage environment. Hadoop distributed file system consists of big data, Meta Data Servers (MDS), number of replica, Storage Server (SS). Configure the file system based on the above mentioned things with proper communication. Prepare the social network big data. It consists of respected user id, name, status, updates of the user. After the data set preparation, it should be stored in a distributed storage server. B. Data update in distributed storage The user communicates with distributed storage server to access the big data. After that, user accesses the big data using storage server (SS). Based on user query, update the big data in distributed storage database. By updating the data we can store that in the storage server. C. Chunk list replication to storage servers The chunk list consists of all the information about the replicas which belongs to the same chunk file and stored in the SSs. The primary storage server which has the chunk replica that is newly updated to conduct the adaptive replica synchronization , when there is a large amount of the read request which concurrently passes in a short while with minimum overhead to satisfy this that mechanism is used. D. Adaptive replica synchronization The replica synchronization will not perform synchronization when one of the replicas is modified at the same time. The proposed mechanism Adaptive replica synchronization which improve the I/O subsystem performance by reducing the write latency and the effectiveness of replica synchronization is improved because in the near future the target chunk might be written again, we can say that the other replicas are necessary to update until the adaptive replica synchronization has been triggered by primary storage server. In the distributed file system the adaptive replica synchronization is used to increase the performance and reduce the communication bandwidth during the large amount of concurrent read request. The main work of the adaptive synchronization is as follows: The first step is chunk is saved in the storage servers is initiated .In second step the write request is send one of the replicas after that the version and count are updated. Those SS update corresponding flag in the chunk list and reply an ACK to the SS. On the next step read/write request send to other overdue replicas .On other hand it should handle all the requests to the target chunk and the every count is incremented according to the read operation and frequency is computed. In addition, the remaining replica synchronization for updated chunks, which are not the hot spot objects after data modification, will be conducted while the SSs are not as busy as in working hours. As a result, a better I/O bandwidth can be obtained wi th minimum synchronization overhead. The proposed algorithm is shown in algorithm. ALGORITHM: Adaptive replica synchronization Precondition and Initialization: 1) MDS handles replica management without synchronization, such as creating a new replica; 2) Initialize [Replica Location] [Dirty], [cnt], and [ver] in Chunk List when the relevant chunk replicas have been created. Iteration: 1: while Storage server is active do 2: if An access request to the chunk then 3: / Other Replica has been updated / 4: if [Dirty] == 1 then 5: Return the latest Replica Status; 6: break; 7: end if 8: if Write request received then 9: [ver] ↠ I/O request ID; 10: Broadcast Update Chunk List Request; 11: Conduct write operation; 12: if Receiving ACK to Update Request then 13: Initialize read count 14: [cnt] ↠ 1; 15: else 16: /Revoke content updates / 17: Undo the write operation; 18: Recover its own Chunk List; 19: end if 20: break; 21: end if 22: if Read request received then 23: Conduct read operation; 24: if [cnt] > 0 then 25: [cnt] ↠ [cnt] + 1; 26: Compute [Freq] 27: if [Freq] >= Configured Threshold then 28: Issue adaptive replica synchronization; 29: end if 30: end if 31: end if 32: else 33: if Update Chunk List Request received then 34: Update chunk List and ACK 35: [Dirty] ↠ 1; break; 36: end if 37: if Synchronization Request received then 38: Conduct replica synchronization; 39: end if 40: end if iv.PERFORMANCE RESULTS The replica in the target chunk has been modified by the primary SSs will retransmits the updated to the other relevant replicas, and the write latency is which is required time for the each write ,by proposing new mechanism adaptive replica synchronization the write latency is measured by writing the data size. Fig:2 Write latency By the adaptive replica synchronization we can get the throughput of the read and write bandwidth in the file system. We will perform both I/O data rate and the time processing operation of the metadata. Fig.3.I/ O data throughput VCONCLUSION In this paper we have presented an efficient algorithm to process the large amount of the concurrent request in the distributed file system to increase the performance and reduce the I/O communication bandwidth. Our approach that is adaptive replica synchronization is applicable in distributed file system that achieves the performance enhancement and improves the I/O data bandwidth with less synchronization overhead. Furthermore the main contribution is to improve the feasibility, efficiency and applicability compared to other synchronization algorithm. In future, we can extend the analysis by enhancing the robustness of the chunk list REERENCES [1] Benchmarking Mapreduce implementations under different application scenarios Elif Dede Zacharia Fadika Madhusudhan,Lavanya ramakrishnan Grid and Cloud Computing Research Laboratory,Department of Computer Science, State University of New York (SUNY) at Binghamton and Lawrence Berkeley National Laboratory [2] N. Nieuwejaar and D. Kotz, â€Å"The galley parallel file system,† Parallel Comput., vol. 23, no. 4/5, pp. 447–476, Jun. 1997. [3] K. Shvachko, H. Kuang, S. Radia, and R. Chansler, â€Å"The Hadoop distributed file system,† in Proc. 26th IEEE Symp. MSST, 2010, pp. 1–10, [4] M. P. I. Forum, â€Å"Mpi: A message-passing interface standard,† 1994. [5] F. Schmuck and R. Haskin, â€Å"GPFS: A shared-disk file system for large computing clusters,† in Proc. Conf. FAST, 2002, pp. 231–244, USENIX Association. [6] S. Weil, S. Brandt, E. Miller, D. Long, and C. Maltzahn, â€Å"Ceph: A scalable,high-performance distributed file system,† in Proc. 7th Symp. OSDI, 2006, pp. 307–320, USENIX Association. [7] W. Tantisiriroj, S. Patil, G. Gibson, S. Son, and S. J. Lang, â€Å"On the duality of data-intensive file system design: Reconciling HDFS and PVFS,† in Proc. SC, 2011, p. 67. [8] S. Ghemawat, H. Gobioff, and S. Leung, â€Å"The Google file system,† in Proc. 19th ACM SOSP, 2003, pp. 29–43. [9] The Lustre file system. [Online]. Available: http://www.lustre.org [10] E. Vairavanathan, S. AlKiswany, L. Costa, Z. Zhang, D. S. Katz, M. Wilde, and M. Ripeanu, â€Å"A workflow-aware storage system: An opportunity study,† in Proc. Int. Symp. CCGrid, Ottawa, ON, Canada, 2012, pp. 326–334. [11]GfarmFileSystem.[Online].Available:http://datafarm.apgrid.org/ [12] A. Gharaibeh and M. Ripeanu, â€Å"Exploring data reliability tradeoffs in replicated storage systems,† in Proc. HPDC, 2009, pp. 217–226. [13] J. Liao and Y. Ishikawa, â€Å"Partial replication of metadata to achieve high metadata availability in parallel file systems,† in Proc. 41st ICPP, 2012, pp. 168–1.

All Grown Up and No Place to Go Teenagers in Crisis

Child and adolescent development specialist David Elkind contends that today's teenager’s are struggling as the result of a shift in society to a â€Å"postmodern† period. In this period, â€Å"the needs of children and youth are often weighted less heavily than are the needs of parents and the rest of adult society† ( xiii ). Elkind believes that, as a result, â€Å"we as a society have abrogated our responsibility to young people† (xiv).Elkind explains how, in this postmodern period, adults mistakenly treat teenagers as though they were already competent and sophisticated, and therefore do not guide them from childhood into adulthood, as youth were guided in previous generations. His words sound a clear warning to teachers and other adults who tend to confuse teenager’s' physical maturity with emotional, psychological, social, intellectual, and spiritual maturity. A useful feature is his discussion of how the â€Å"growth markers† that were formerly available to guide children into adolescence and teens into adulthood are now absent.Examples include girls of all ages now being encouraged to wear makeup and sophisticated clothes, and boys of all ages being encouraged to participate in high-stakes competitive sports teams. Teen’s perception of stereotypes varies from person to person. It is interesting to know that how teens identify groups and how they decide to associate themselves with particular ones, at a time in their lives when age-mates take on a greater significance and the influence of adults diminishes.Teachers should not ignore or underestimate the power of peer influence; although we commonly think of this influence in negative terms, this article helps us recognize that peer influence can be a positive contributor to teenager’s' classroom behavior, too. The role of environment in determining behavior is considered, much greater by the intellectual descendants of Locke. More than adherents of other schools, they see humans as substantially malleable; they are convinced that children's behavior responds to the expectations expressed for it.Thus, if we believe that teenagers will be moody and rude, our children are likely to comply; if we relegate them to a social holding pattern, they will adopt the general characteristics of powerlessness. The discipline of child psychology, as well as the children it studies, is influenced by cultural assumptions seems beyond doubt. But then, what is to be made of these conflicting views about the plasticity of development? It would hardly be feasible to attempt a grand synthesis of these positions. David Elkind, a longtime observer and scholar of child development and family life, sees in the modern family a â€Å"permeable† family.He discerns in the seeming imbalances and morbidities of postmodern families the stresses hammering at children and youth in the contemporary society and a new family form emerging, a form that is bas ed on values and sentiments that prepare its members to cope with this stunning array of pressures. Three sentiments and their resulting practices are particularly heartening from his point of view. To be sure, by the teenage years, parents must exercise most of their authority by stating acceptable alternatives and sticking to them, even if that means throwing a child out of the house.In a sense, then, we are no longer talking about the kind of parental control liberationists object to, but more subtle pressures generally compatible with their stand except insofar as they think teens have a right to financial support no matter what their behavior. Teens might also insist that drinking or doing drugs should be their own choice, just as it is for adults. But the reverberations both for themselves and for those about them suggest the desirability of pressing them to limit such activities in a way that might not be appropriate for adults.David Elkind has warned against pushing children too fast in an age-inappropriate manner. Latency-age children bear much of the burden of a faster-paced society. Adults are spending more time at work than ever before; children are shuffled between activities in part due to their parents' schedules. Children's time outside of school has become more structured; they participate in extracurricular pursuits at earlier ages. Doing nothing, as in â€Å"those lazy, hazy days of summer,† previously part of the culture of a child, is no longer promoted or valued. Some children no longer just go out to play, they have â€Å"play dates.† They are infrequently left free to explore what they would do if there were nothing to do. There is no time for daydreaming. Television and computers have replaced quieter moments. Rarely do you hear a child say, â€Å"Turn off the television. I want to read now. † In this speeded-up society, adults are resigned to Elkind's concerns; there is no turning back for today's children. Parent s may rationalize and say it is a good learning experience for an eight-year-old to be home alone. Elkind's recommendation is that given the stress imposed on them, children should be taught skills to help them cope effectively with what is expected of them.For example, the â€Å"latchkey† child should be offered assistance such as phone numbers for reaching a parent, the police, and a neighbor, and instructions on what to do in case of fire. Rituals and routines are important components in the structure of the middle childhood years. As children begin to organize and classify their knowledge, they come to depend on routines to help them consciously and unconsciously deal with new issues and experiences. Birthdays, secular and religious rituals, and common developmental milestones all help them to find their place in the world.They are seeking to be connected to the larger society through attachments in school, with their peers, with their teachers, in social activities, and in their families. Ironically, because teenager’s are continually redefining their thinking about self and their own value systems, they are highly vulnerable to believing in media myths. As such, outside-in problems manufactured by the media through the power of suggestion and constant repetition become teenager’s' inside-out personal problems In short, adolescence is the stage in life when children begin to question their own thinking in light of what others think of them as well as for them.In this regard, teenager’s' sense of thinking is not wholly independent of their social sense of self. Although as parents, researchers, and teachers, we may be aware of the variable nature of the teenager’s' thinking self, we may not realize that adolescence is a relatively new stage in human development. In colonial America, teenager’s served as a source of cheap labor. With the advent of modern industrialization, longer periods of schooling have been requi red to prepare children for the workplace. This, in turn, has extended the time that children are economically dependent on their parents.As children enter the teenage culture, they are drawn away from their parents and into peer groups. In the process, teenager’s' developing social sense of self is placed into a tug of war between the norms and pressures of parents and friends. Adolescence in America is the psychological equivalent of toddlerhood. Just as toddlers move away from their parents physically, so teenager’s move away from their parents emotionally There are continuous negotiations between parents and children about distance. Children want to explore and parents want to keep them safe.And both toddlers and teenagers are outraged when their parents don't agree with them about the ideal balance of freedom and security. As teenager’s turn to their peers for validation and support, they often engage in intense experimentation, exploring a wide range of po ssibilities that often contradict parents' cherished beliefs in behavioral norms. In the process, teenagers may become the biggest enforcers and proselytizers for their own peer culture: Teenagers may punish other teenagers for failing to achieve the same impossible goals that they themselves are unable to obtain.Moreover, they may rush to set standards to ward off the imposition of others' standards on them. All the while, the content of the standards may remain variable often depending on what standards the media is marketing at a given time, from baggy pants and body piercing to tattoos and the latest neon hair styles. Teenager’s' social sense of self invariably leads to contradictions, as does their thinking sense of self. Social self-contradictions arise from teenager’s' membership in multiple groups that maintain different expectations and norms.More importantly, contradictions continually arise as teenager’s switch their loyalties from one peer group to t he next, giving rise to competing allegiances. In sum, teenager’s experience contradictions inside-out in terms of their thinking sense of self as well as outside in terms of their social sense of self. In many instances, the frustrations of these contradictions are further exacerbated by the academic sense of self that schools promote. One of the most visibly striking transformations during adolescence occurs as a girl's body changes in size and shape.Girls tend to appear rounder as their hips widen, and fat develops in the breasts, thighs, and buttocks. As these changes occur, culture tells girls that thinness is beautiful, even imperative. Not surprisingly, it is also during this period that girls become increasingly concerned with their bodies. Girls' changing bodies provide powerful stimuli to the self and others. A pertinent issue during early adolescence is that bodily changes bring about a sense of fragmentation in body image. Thus, the body is frequently depicted as a collection of individual parts, such as breasts and hips.So, for example, many girls this age worry about the size of their breasts. In the United States, bigger is generally considered better, yet not from girls' perspectives. Rather others are believed to hold that value. Because the body is often times viewed as a reflection of the self, the eroticization processes through which the body is transformed into a sexual object become a major source of conflict for many teenager girls. Teenager girls continue to suffer in multiple ways as a result of these complex social processes.Meanwhile the psychologists and psychiatrists who have historically led the study of what is known as â€Å"body image† have done so in ways that limit knowledge and understanding of girls, further contributing to the structures supporting domination and oppression of females. That is, these researchers have almost exclusively studied â€Å"body image† through quantitative measures that assum e objectivity. In the process, they have conveniently and openly ignored and dismissed contributions from social scientists and feminists who have studied the body from alternative and more hopeful perspectivesNevertheless, body image work has become influential, creating at least three problems. First, the historical study of â€Å"body image† has contributed to the objectification of the body. Second, â€Å"body image† researchers have created a logic of pathology to explain girls' problems Result of irresponsible sexual activity is substantial teenage motherhood. Yet the consequences of early childbearing are extremely damaging. Pregnancy doubles the risk that a girl will drop out of school; most such girls never return, regardless of their financial situation or ethnic background.Once the child is born, the girl is unlikely to be in a position to earn more than welfare would offer her and she has the responsibility of a child to boot. But if she chooses to go on we lfare, her sense of agency and independence is seriously damaged. If she marries instead, she is not only unlikely to finish her schooling but also faces a significantly higher probability of divorce than a woman who waits until her twenties to marry. Thus girls who engage in unprotected sex and who elect to keep their babies are at serious risk of a worse life than they could otherwise have expected.â€Å"But the damage does not stop there. The plight of their children is painful. Neither parent may take responsibility: they may be ignored by their fathers and handed to some female relative by their mothers. For the child, this may be a blessing in disguise, as the most irresponsible teens are those least likely to possess the qualities required for good childrearing. As these babies get older, however, they show the effects of their unfavorable environment. Children of teen mothers score worse on ability tests, get worse grades, and expect less in the way of education than childr en of older women.They also get less education, marry earlier, and divorce more often†. (p. 133) David Elkind questions the popular conception of parental authority Exerting parental authority doesn't mean that we can't play ball with our children or joke with them or have fun with them. Being a parent doesn't mean being an ogre or a relentless disciplinarian. Rather it means asserting ourselves as adults who have more experience, knowledge, and skill than our offspring. Children and teenagers are young and inexperienced. They very much need and want guidance and instruction from us. (205)At least three areas of concern arise from the literature about violence on television. The obvious ones are the relationship between television violence and aggression, even if the aggression is not directed against society, and the desensitization of children to pain and suffering. The less obvious one is the potential for children who are sensitive and vulnerable to become more fearful and insecure upon exposure to violence on television. â€Å"Television has brought murder into the home, where it belongs† (Elkind, p. 103). Murders and crime occur about ten times more frequently on television than in the real world.A third of all characters in television shows are committing crime or fighting it, most with guns. It becomes, therefore, a chicken-and-egg question. When one examines violence in films the trend towards increased gore and explicit horror is easily documented. Rather than reflecting the content and meaning associated with myths and fairy tales, horror films today are pure sensation with little serious content. If violence on television is controlled, children and adults will still be able to experience violence vicariously through other media such as films, books, and recordings.The contemporary challenges that have created this increase in stress among today's teenager’s, in Elkind's terms — the â€Å"perils of puberty,†  "peer shock,† and â€Å"family permutations†. Authentic parenting is an outgrowth of shared parenting but integrates unilateral and mutual authority depending on the concern at hand and the developmental stage of the child. But it is also leavened by a realization that each parent can perform their roles in ways that are true to their own temperaments, personalities, and experience. Finally, there is an emergent relationship between community and family.How well a family does is seen as partly dependent upon the ties it has with the community and the resources and assets available in the community. Community service has become a part of the required curriculum in many schools. Other neighborhoods are reaching out to isolated families or individuals and families in trouble. Some schools have become â€Å"lighted schoolsâ€Å"—twenty-four-hour family resource centers providing programs, services, and opportunities for connections to others. According to Elkind, i nterdependence is a central value and sentiment that underlies this emerging family form.â€Å"Interdependence is founded upon a sense of being both one and many, of being different from everyone else and like them at the same time† (p. 220). Traces of his longing for the modern family aside, Elkind's thesis about the new family embodies some of what we know about family resilience to this point. And it can apply in spirit to all families and caretaking relationships. It is important, as a starting point, to realize that every family, even those in the midst of gripping disorganization and bewildering turmoil, has strengths and capacities.Every angry, demanding parent has moments of caring; every confused teenagers has moments of hope and clarity; every abusive father has a twinge of doubt or regret. At some time in every family's life there have been periods of relative calm and stability. Every family has overcome hurdles, some more successfully than others. All of these ar e resources to be drawn upon, by the family members themselves or by someone who would deign to be of help to them. Works Cited Elkind David. ( 1998). All Grown Up and No Place to Go: Teenagers in Crisis. Rev. ed. Reading, MA: Addison-Wesley

Analysis on settlement hierachy coursework

In my introduction of my investigation I made a hypothesis that said, â€Å"the settlements of Prestwood and Wendover demonstrate the settlement hierarchy.† I predicted that Prestwood was a large village and Wendover was a small town, and I said that I would try and prove this by observing and comparing the two settlements with each other. Over the last four months I have investigated this hypothesis thoroughly and my results and data presentation have proved that my hypothesis was correct. I have collected this data in various different techniques, but my main technique was the questionnaire, which I carried out in both settlements. Some of which is primary information, like the questionnaire which I designed, the photographs which I took of particular services and characteristics in each settlement which I collected all myself; and some of it is secondary information like the data which I collected from the Aylesbury reference library. My data helps show that the two settlements that I carried out my investigation in, Prestwood and Wendover are placed in some sort of order in the settlement hierarchy. Prestwood is the smaller settlement of the two with a population of 7124 people, and Wendover being the larger settlement of the two having a population of 8612 people; I collected this data form the Aylesbury reference library. Also in Wendover there is a wider range of places where the people have visited from in Wendover, whereas in Prestwood the majority of people visited from within the settlement and so I sketched out a land use survey of the services and whether or not they were high or low. After examining and comparing each of the settlement diagrams I realized that there is higher amount of high order services in Wendover than Prestwood which symbolizes another characteristic of a town. Whilst collecting my data for my questionnaire I had to write down the services available and whether they were low or high services. I found out that Wendover has a larger amount of services available than Prestwood and so more people would visit the settlement due to the wider range of services. I carried out a traffic survey also and I found out that Wendover has a higher average of vehicles passed per minute in a busy part of the settlement than Prestwood. 1. What are the populations of the two settlements? To investigate about this question I researched and collected information from the Aylesbury reference library. During my visit there I found out the population of each settlement. I discovered that the population of people living in Prestwood is 7124 people. I also found that Wendover has a population of 8612 people. Due to the fact that I found out that Wendover has a larger population of people than Wendover it gives us the impression that it is a larger settlement also and more likely to be stated as being a town than a village. This makes my theory and prediction correct, when I stated that the larger settlement would have a larger population. 2. What services are available in each settlement? (Low/High) The settlement of Wendover contains of a large number of low, medium and high order services, with a total number of 10 low order, 21 medium order and 10 high order services. In the certain area of which I carried out my investigation there were a number of 10 low and medium order services and 8 high order services. The settlement of Prestwood contains mostly medium order services with some low order and one or two high order services. In the certain area of which I carried out my investigation in Prestwood there were a number of 10 low and medium orders services and 6 high order services. These facts agree with my theory and prediction of; the settlement with the larger population would have a larger number of high order services and the smaller settlement would have a larger percentage of low and medium order services. I think that this is true due to the fact that if there are more people living in the settlement there will correspondingly have a range of low, medium and high order services. 3. How far do people travel to visit Prestwood and Wendover for their services? (High/Low) During my investigation I carried out a questionnaire to find out information about this question. In the settlement of Wendover people travelled from distant surroundings like the outskirts of Aylesbury and Princes Risborough. Whereas in the settlement of Prestwood I found out that there are only very few people whom visit the services actually outside Prestwood, let alone travelling a long distance to use the services. I also discovered whilst carrying out my questionnaire in Wendover that most people whom have visited from a distance used the high order services, while on the contrary the settlement of Prestwood most people visited to use the low order services. These statistics give me the impression that people are only willing to travel a long distance to use the high order services rather than in Prestwood most people have travelled from within the village or the outskirts of it. Due to the fact that there are more high order services available in Wendover may be the reason in why there is a higher amount of people using the services, and why more people have travelled to Wendover from a distance than Prestwood. From my questionnaire research I found that the general maximum people travel to visit Prestwood is the settlement of Gt. Kingshill, which is only 3 minutes away from the services. I have not included the person whom visited from Aylesbury or Hughenden or the person whom was passing through, due to the number for each was so little. In extent, the maximum length people travel to use the services of Wendover was the settlements of Gt. Missenden and Prestwood, which is roughly 7 miles. 4. Do the number of services available reflect the population of each settlement? In Wendover the number of services does reflect the population of the settlement; this is due to having the population of a small town, being smaller than the large town and bigger than a large village. This is corresponding in the amount of the services and the type of order of the services, as there are more services, with a higher order than the small village but a smaller amount of services than the large town. In Prestwood the number of services does also reflect population of the settlement; this is due to having the population of a large village, being smaller than a small town but larger than a small village. This also corresponds in the amount of the services and the type of order of the services within the settlement. These statistics prove my prediction to be accurate due to the fact that I stated that the larger settlement, the higher the number of services available and the smaller the settlement the lower the number of services available. 5. How many vehicles pass in a certain place of each settlement? In the certain area of which I carried out my traffic survey in Wendover there seemed to be an awful lot more vehicles passing than in the area in Prestwood. I encountered that the average number of vehicles passed in Wendover was 22.467, which is a reasonable high amount. The average number of vehicles in Prestwood was 15.867. These statistics symbolizes the difference of traffic between a town and a village. The larger the settlement the more cars travelling throughout. In my opinion this is due to the population of Wendover being more then Prestwood being higher and so accordingly there should be a higher amount of cars travelling about. The data I gathered follows the theories I introduced in my introduction precisely, this states about the Settlement Hierarchy. All the settlements followed the settlement hierarchy. This theory states that the smaller the settlement and population the less frequency and quality of the services. Therefore the small towns, with small populations, have very few services and the ones that it does are of low quality. Oppositely the large settlements, with large populations, will have more services which are of better quality. I can see this trend of data in my results and data presentation. Prestwood has a smaller population so pursuing my theory it should have fewer services which are mostly of high and low order services, and from my data I can see that is true. Wendover is a larger settlement and has a larger population so, in agreement with my theory, it should have more services, which are of a high order. During the time in which I carried out my questionnaire in Prestwood I asked a man where he had travelled from to use the service he had used, and he replied that he was from Newport in Wales and had come down to visit some of his family. Due to this being very unusual answer I counted his data as an anomaly and did not include it in my results table or in any of my graphs. This interpretation does not relate to my knowledge of the area and that is one of the reasons in which I have not included this in my data. Another is that it does not agree and correspond with my theory and is a one-off occurrence during my investigation. As I have stated before, the settlement of Wendover would obviously be placed above Prestwood in the settlement hierarchy. But if I were asked to place them appropriately on the settlement hierarchy this is where I would. As you can see above I have placed the two settlements appropriately; Wendover is plotted beside the small town section and Prestwood at the top of the village section which is symbolizing that its is not quite a small town but a large village. In conclusion, during the time that I have carried out my investigation on whether â€Å"the settlements of Prestwood and Wendover demonstrate the settlement hierarchy† I have discovered many factors in thorough detail. I have found out that the settlement of Wendover and the settlement of Prestwood do in fact demonstrate in some order the settlement hierarchy. From my own knowledge, experiments and techniques I have made an opinion of my own that Prestwood is a large village and Wendover is a small town. I have discovered through secondary information from the Aylesbury reference library that the settlement of Prestwood has a population of 7124 people, and Wendover, the larger settlement of the two has a population of 8612 people. I have also established that the two settlements of Wendover and Prestwood also demonstrate the order of services hierarchy due to finding out that the larger population the larger the number of high order services and the smaller the settlement the larger percentage of low and medium order services. The larger the population the higher the number of services within and so there is a higher majority of people visiting from far distances. The higher the number of services in the settlement the larger the population and the larger the settlement the busier the roads and the higher amount of vehicles passing.

Effects Of The Vietnam War On The United States - 1673 Words

The effects of the Vietnam War with the United States and Vietnam had devastating effects for both sides. The United States entered this war as a way of proclaiming that it was the world power and to help out a country that split into the North and South Vietnam. One side was communist and the other side was a republic. The Viet Cong tried to oppress and take over. The United States reacted to this threat as a communist act and decided to step in and aid the people of Vietnam. This war was classified as the most controversial and bloodiest wars in history. There were many tragedies and misconceptions with both sides. The Vietnam War was one of America’s most controversial wars. Many of its aspects are still plagued with great uncertainty. The aspects of the Vietnam War are still argued and debated about. People still want to know and ask the questions of why did the war start. What reasons did the United States’ have for getting involved? What was the objective of the war? What was the American soldiers really fighting, or dying for? The containment of Vietnam was supposed to be an in and out war? We ask ourselves â€Å"How do you explain a war to someone who has not experienced â€Å"war† firsthand, especially if you were not there?† The answer is â€Å"There is no real answer.† We can look at all the facts and but what about the human perspective of the war. There were so many people involved in the decision making of the Vietnam War. There was the President, the politicians, theShow MoreRelatedEssay about What Were the Effects of the Vietnam War on United Sta tes?3066 Words   |  13 Pagesthe effects of the Vietnam War on United States? Thomas Liao U.S. History Mr. Magill February 18, 2010 Word Count 2785 Table of Contents The Paper 3 Works Cited 12 From 1959 to 1975, America has been engaged in her longest and most disappointing war she has ever been in, the Vietnam War. The war heavily taxed the country’s patience and will of the government. There were several bad decisions which led to the ultimate defeat and retreat of U.S. The Vietnam WarRead MoreThe Vietnam War Essay1701 Words   |  7 PagesSummary Like any other war the Vietnam War had a lot of devastating effects after the war ended. It also had many causes that changed many things after this war. The Vietnam War was fought between 1964 and 1975 on the ground in South Vietnam and bordering areas of Cambodia and Laos, and in bombing runs over North Vietnam.1.There were two opposing sides. On one side it was a coalition of forces including the United States, the Republic of Vietnam, Australia, New Zealand, and South Korea. AndRead MoreThe Vietnam War1737 Words   |  7 PagesThe purpose of the Vietnam War, was to end the awful spread of communism. As Ho Chi Minh (North Vietnam’s communist president) fought to which spread North Vietnam’s political uses to Southern Vietnam. With this, the American Military Advisors sought to believe that a fall of Southern Vietnam to communist hands, would then lead to a total takeover of neighboring nations to fall under communism. The effect of the neighboring nations falling, w as known as the â€Å"Domino Effect†. It all began when TheRead MoreThe American Role During The Vietnam War Still Sparks Much Debate Today1390 Words   |  6 Pagesthe Vietnam War still sparks much debate today. There is a sharp focus on the Americans role in the Vietnam War because of the tragic end for the South Vietnamese. The United States faced much criticism world wide through literature during the war that continued after the war ended in 1975. The American governments reasoning for getting involved was to prevent the spread of communism in South Vietnam and to essentially prevent the domino effect. South Vietnam had no hope of winning a civil war againstRead MoreImpact of Vietnam War on American Culture1421 Words   |  6 PagesThe Vietnam War began in the year 1954, after the ascension to power of Ho Chi Minh, who was a communist leader in North Vietnam. The leader was spreading communism, and because the United States wanted to stop the spread, it sent military t roops to aid South Vietnamese to stop this vice. The war saw about 3million people die with the inclusion of 58,000 American soldiers. About 150,000 people were wounded during the war. In 1975, South Vietnamese government surrendered the war after the communistRead MoreHis/135 Week 5 Assignment Vietnam War761 Words   |  4 PagesThe Vietnam War is one of America’s longest lasting wars beginning in 1955, and lasting until 1975. The United States became involved in the Vietnam War because of its efforts to stop communism in Southeast Asia. The United States feared that if communist took over Southeast Asia it would cause a domino effect around the world. The United States began sending financial aid and military advisors to South Vietnam to help stop a communist takeover. North Vietnam was run by communist leader Ho Chi MinhRead MoreAgent Orange : Medical Ethics1657 Words   |  7 PagesMotivation: Throughout the past Forty years the Vietnam war and it’s after effects have shaped and changed so many individuals and their lives. I will expose a deeper look at what actually occurred during the war and most importantly what actually caused the millions and millions of lives; both Vietnamese, Japanese, and American. Problem statement: With war comes after effects and throughout the past Forty years many American Veterans from Vietnam have had health complications and issues due toRead MoreLosing Vietnam On The Home Front1672 Words   |  7 Pages Losing Vietnam on the Home-front Forty six years have passed since the United States officially stopped their involvement in Vietnam. Not since the Civil war had the country been so torn. Every American family was impacted, losing husbands, sons, and daughters. Over fifty thousand Americans were killed and many more still suffer deep physical and emotional scars . Veterans took their own lives, were treated as social outcasts, or ended up on the streets with the homeless. The Vietnam conflictRead MoreThe Vietnam War And The Cold War1494 Words   |  6 Pagesexamining the Vietnam War you must first understand the involvement of the events surrounding the Cold War. The ‘Vietnam War’ as it is known is a product of the cold war era, by this I mean that events in the Cold War led to the US’s involvement and creation of issues causing the conflict. â€Å"The Vietnam War was a long, costly armed conflict that pitted the communist regime of North Vietnam and its southern allies, known as the Viet Cong , against South Vietnam and its principal ally, the United States.† TheRead MoreThe Vietnam War1100 Words   |  5 PagesThe Vietnam War began on November 1st, 1955.Vietnam decided to have this war because since a very long time ago, Vietnam wished to have a government that was independent, since it has been for a long period of time, colonized first by China, then France and Japan. The United States started this war as a result of the Cold War. This war is caused by the belief that communism was going to expand through south-east Asia, which is not of great content for the United States, since they hold a capitalist