Report on Multi User Operating Systems Essay

Resources Sharing Concepts of Resource SharingA multi user operating system keister corroboration to a greater extent that one user at a judgment of conviction, this means that multiple users can sh be the similar system resources simultaneously. The users of a multi user operating system can dispense both hardw be and parcel resources, the operating system carries out complicated routines to manage all the unconscious processes that the users be running. List of shared resources * hardware processor Power, RAM, Hard drive, Peripherals (printer, Scanner, CD ROM) Other peripherals may be made available in a MUOS for users who desire them (Floppy disk drive, Speakers, Head Phones, Video Cameras etc.)* Software Scheduler Software (needed to manage and prioritise tasks). Batch affairSome processes take a long meter to complete and can often disturb otherwise computer tasks that are Copernican. A Batch Job is a file that does not require any(prenominal) user interactio n, so it is set up to run a number of processes at a later(prenominal) time, often late at night. One example is overnight maintenance at a believe when they update all the accounts so it pull up stakes not disrupt the other processes during the day.Multi-Tasking Concepts of multi-taskingMulti tasking is when the operating system strikees between tasks at a very high speed, it can sometimes seem as though it is execute more(prenominal) than one task at a time. For example, a user could be printing and typewriting at the aforesaid(prenominal) time, and listening to a CD. Many users can access the same resources at (what appears to be) the same time. One dis profit of this is that it requires a great cut through of memory and the processes may run slower.The two types of multi-tasking are co-operative and pre-emptive* Pre-emptive This is when the applications are forced to give up the CPU after a certain aloofness of time so that the other processes get an equal share of CP U time. (time-sliced).* Co-operative multi-tasking is when it is the current running tasks responsibility to share the CPU to the other processes. One task must finish before the other starts. It is called Co-operative because all the tasks must co-operate for this type of processing to work and there is no time limit on severally task. (Round Robin). Advantages / DisadvantagesAn advantage of Pre-emptive multi-tasking is that some important tasks may be allocated a more time slices so it will not be stalled by other smaller tasks.A wrong of both types of multi-tasking is that it requires a abundant meat of memory to work properly. context Processing Concepts of background / suck up processingWhen a task will require a long time to process and requires no user input e.g. downloading a large file from the internet, it can be processed later when the computer is not processing other tasks. Background processing is often used in banks and businesses to process the customers accoun ts at the end of each day, the operating system can be left to run the process overnight or when the CPU is not currently being used by a task that requires a great deal of processing. Unix command to run background processingControl-Z = Leave process running in backgroundbg = touch process at backgroundControl-C = move foreground process to backgroundFg = move the process to foreground Example of a background processIf you need to run a large print job, e.g. printing out one hundred copies of aWorkbook for a group of students, it can be set as a background process and will only use CPU forefinger when other tasks are not running.Types of Multi-User Operating SystemMulti-Processor More than one CPUMulti user operating systems can sometimes have more that one processor. In some expensive operating systems it is possible to connect more CPUs to the system and have them work together to execute tasks.Multiprocessing can significantly reduce the time taken to execute each process. An operating system with multiple processors can perform un akin tasks respectively or a task can be split up and processed by different CPUs. Advantages / DisadvantagesAn advantage is that multi processing systems can be very speedy at completing tasks.A disadvantage is that this type of system is very expensive.Time-SlicedAs multi user operating systems share resources, different processes can require different amounts of time. It is possible and to interrupt a large process so that a smaller process to be completed. If you were using a time slicing system then the processor will switch between processes at timed intervals (Pre-emptive). The amount of time allocated to each process is called a time slice. The length of time given for each time-slice is allocated by a program called a scheduler. An advantage is that larger or more important processes may be given more time slices than a smaller task so it can be completed, however this could also be a disadvantage if there are many u sers executing smaller tasks as they will take longer to be finished.DistributedThe distributed system is where a number of systems are connected through a Local Area Network. This can be more powerful than a single processor system and it is capable of online sharing.Hardware ComponentsProcessor The CPU is the pass of the operating system. It responds to and processes and instructions that control the computer. The control unit in a CPU controls everything which happens within, the ALU does calculations and is responsible for ending making and the accumulator stores the last data that was decoded for future processes. There are various registers within the CPU, they are the instruction register, which h emerituss the instruction that is being decoded, the program counter stores what part of the program we have reached, the memory voice communication register points to the location where data is being fetched or written and the memory data register is a storage area for data that is currently being transferred between the memory and the CPU. The Fetch-Decode-Execute Cycle has three important stages.* FETCH The CPU collects an instruction from the RAM* DECODE The control unit figures out what to do with it.* bleed The instruction is carried out The speed of an FDE cycle depends on how fast the processor is (the length of time it takes for the signals to be sent to the control bus, and how many T-cycles each assembly instruction takes to execute. holdingRandom Access Memory is sometimes known as main memory. RAM is volatile, which means it loses all the stored information when the power is cut off. Some computers also use virtual memory, which is stored in the hard drive but acts like RAM, this is much slower than physical memory. Another type of memory is Read Only Memory (ROM) which can be written to but cannot be erased.Data Storage Devices Floppy disk can be written to and erased, 1.44Mb CD ROM Can be written to but not erased, 700Mb Hard bowel mov ement stores many Gigabytes, can be written to and erased Zip Drive can be written to and erased, carbon 250MbTerminals Dumb Terminal A dumb terminal has no processing capabilities as they have no memory or processor of their own, it has only a monitor, keyboard and mouse. They are connected to a substitution processor. reasoned Terminal An intelligent terminal contains memory and a CPU and is a standalone finesse. It only has to connect to the central processor when needed. Command to find terminal type terminfo commentary / Output DevicesDumb Terminal Input keyboard and mouse. Output monitorIntelligent Terminal Input keyboard, mouse, scanner, touch screen. Output monitor, printer, speakersSoftware Components plazaThe Kernel is the heart of the operating system, the lowest level or the central part. Communication with the hardware is through the kernel. In multi user operating systems it is the kernels job to keep each process and user signalise and to organize acces s to the system hardware, including CPU, memory, disk and other I/O arts.Device HandlersA device is any piece if hardware that is used in an operating system. A device handler is a piece of software within the operating system that communicates with the devices and tells them what to do. This is part of the operating system that is responsible for function requests of the device request queue.Spoolers (Simultaneous peripheral operations on-line)Spooling is used when data is waiting to go to an output device after it has been processed. The data is placed into a queue so that the CPU can process something else alternatively of having to slow down to the speed of the output device. Spoolers are used on mainly old devices e.g. old printers that can only handle one job at a timeUser embrasureThis is how the user can view the data within the operating system. The main types of user interfaces are the graphical user interface e.g. Windows and Command driven interface e.g. MS DOS and s tandard UNIX. The CDI was more complicated to use than a GUI as you would have to know certain commands to do very prefatorial tasks.BibliographyIndexhttp//physinfo.ulb.ac.be/cit_courseware/opsys/ostart.htmhttp//electronics.howstuffworks.com/operating-system1.htmhttp//physinfo.ulb.ac.be/cit_courseware/opsys/ostart.htmhttp//www.canberra.edu.au/sam/whp/unix-cmd.htmlhttp//cm.bell-labs.com/

Police Operations Essay

There atomic number 18 different levels of law enforcement which include local, offer and federal levels. We are told by The National District Attorneys fellowship that (NDAA, p. 1) As federal authorities are obliged to investigate all told incidents that may be federal civil rights crimes, and local and state authorities ease up independent jurisdiction over such cases beneath their have got criminal statutes, this MOU also should improve the reporting of all such violations to local, state and federal authorities. We are also educated from the same source that this will increase public confidence in this searing law enforcement areas. This demonstrates that all levels of law enforcement can work more effectively together in their efforts at maintaining peace but many times these different levels work alone when the situation falls beneath one category that is controlled by a specific are of law enforcement. The local law enforcement elbow room is a level which involve s city and county sheriff departments which include domestic violence situations, traffic stops and basically all citizen laws within city or county limits.State law enforcement agencies is a level of law enforcement where state troopers normally enforce interstate commerce traffic and they also have a division within the state detective agencies that investigate crimes as well as respond to local and county calls when local law enforcement agencies are backed up and arent able to take care of the calls received. Federal law enforcement agencies handle a wide variety of felony crimes which usually take over the local and state jurisdiction boundaries when federal crimes are committed. They also investigate counterfeit currency and bank robberies.Any time there is a snap crime to be handled, the federal law enforcement level will investigate where local and state agencies have fulfilled their duties. All levels of law enforcement will generally work together for one cause in solving cases where the law has been broken. Each level of law enforcement is extremely important where the local level handles lesser crimes and federal handle major offenses where federal offenses such as bank robberies, illegal felony possession of firearms, scattering of drugs over state lines and cases where federal laws are offended.August Vollmer was a pioneer in law enforcement who contributed to the training of criminal investigative techniques. We are told by Jim Fisher (Fisher, p. 1) that In 1905, the citizens of Berkeley, California, banded together to rid themselves of the prostitutes, maneuver houses, and opium dens operating openly in their town. The man they elected to do the job was a 29-year-old uneducated post carrier who promised to clean things up. Vollmer dedicated much of his time to making changes in law enforcement by ever-changing the way officers were trained, thought and acted as law enforcement officials.He was well-known for using good judgment skills and his own common sense. Another pioneer in law enforcement was Officer James Foreman. We are told that (Lieberman, 2002) Foreman was our world-class African-American constabulary officer. Senator Joe Lieberman today paid tribute to Stamford, Connecticuts first African-American police officer, James Foreman. He is one of the many who were pioneers in law enforcement who made a huge discrepancy is our country through their dedication.

The Sovereignty of American Indians and the Mainstream Community: Is There a Possibility to Coexist?

Nowadays we often hear the word sovereignty when it comes d let to the issues related to Ameri canful Indians. reign and related words such as self-sufficiency, self-determination and personal responsibility argon everywhere. Its nothing new. Indian tribes long have regarded their status as sovereign nations as allowing them special permission to determine their own laws, customs and ways. They see this as somewhatthing assured them by the U. S. Constitution, innumerable treaties (by the way, sometimes broken or do by by whites), federal-court stopings and legislation.What gives sovereignty new currency, however, is an idea in Congress that in the future the tribes could make the field of operations to lawsuits from private citizens, while now they argonnt. It raised a contentious question whether the sovereignty issues of American Indians figure of speech any problem for the larger society. To reply this question, it is useful to consider what Indian sovereignty means in mode rn interpretation and how it modifys the mainstream society.It is common knowledge that three fundamental principles underlie the nature of American Indians tribal powers tribes originally possessed the powers of sovereign severalises conquest terminated external sovereignty this restriction did not affect the internal sovereignty of the tribe and its powers of local self- political sympathies. Thus, sovereignty is inherent to American Indians, and their privileges with respect to court trials, tax income and some kinds of businesses like gaming and sportfishing within reservation lands could not be considered as violating the rights of nonIndians. From the other standpoint, selfgovernment implies approval by the U.S. authorities that a certain measure of tribal decisionmaking is essential but that this process should be monitored carefully so that its outcomes are compatible with the objectives and policies of the larger political power. It means that American Indians sovereignt y is not absolute, and it is logical, as the Indian tribes are subject to the laws of the U. S. A number of critics of Indians sovereign immunity argue that it allows the Indians freedom from being sued and permits them to ignore valid property and fishing rights of non- Indians, especially those living and acetifying in reservations.The states are alike uneasy with their privileges. As the federal government continues to work out details of its familys with tribes, state governments which are the tribes closest neighbors have a separate relationship with them, and its often strained. The lack of state jurisdiction over Indians and reservations, federal controls and inherent tribal sovereignty are all resulting in ongoing disputes between tribes and states. American Indians are not only citizens of the tribe, but also of the U.S. and the state in which they reside. This triple citizenship performs an ambiguous matrix of regulatory and other jurisdictional requirements for Indian s, on and sour their reservations. Jurisdiction over non- Indians living within Indian lands also seems murky. But as Indian tribes crystallise more and more influence, state leaders realize that it is more productive and mutually well(p) to work with, not against, them. In fact, states have a chance to profit economically from good relations with tribes.Mutually beneficial agreements can set up revenue sharing from tribal gas, liquor and cigarette taxes or gambling. Tribes are marketing natural resources and sport hunting and fishing. Some Indian bands are among the states top employers with their manufacturing plants, hotels and casinos, and large tribal governments. With all this going on in many Indianowned companies the most employees are non-Indians. Tribes roaring at gaming are diversifying their economic ventures.Some tribes consider gaming as a means towards an end of their business diversity. The discussed above clearly testifies that American Indians sovereignty in fa ct rather benefits than affects the mainstream American society. On this account it looks reasonable that states and Indian tribes need to sit down and try to work out unitedly what their mutual needs and concerns are, and find a system by which they can, harmoniously and jointly, cooperate to reach some common ground.For sure states and tribes have mutual interests human services, environmental protection and economic well-being create opportunities to cooperate and develop solutions, while maintaining autonomy. The first step in the process of cooperation is to gain mutual understanding. evoke legislators have to accept the growing tribal presence within the federal system so they can effectively address policy questions about shared governing. And tribes need to understand the effects of their actions on states.Ideally, state legislatures would provide the setting for state and tribal governments to work together to resolve issues. Legislation could be scripted to address stat e-tribal negotiations in general, or specific issues such as health and human services, natural resources or gaming. The declared principles to which the nation has dedicated itself are life, liberty, and the pursuit of happiness for American citizens, thus, the bonds of past Indian wardship moldiness be broken forever.

Hispanic Americans Diversity Essay Example | Topics and Well Written Essays - 1000 words

Hispanic Americans Diversity - Essay fontPassing was the name of the game. In the words of Berkeley cultural psychologist George De Vos, we have all noticed right off the evanescent of passing (De Vos 1992).Latinos today are players in social spaces where racial and ethnic category have high-stakes semipolitical and economic implications. The largest wave of immigration in U. S. history-the wave responsible for the current Latino-ization of the country took place later(prenominal) to the great struggles of the civil rights movement.Cuban Latinos, especially mainland Puerto Ricans and immigrant Brazilians, have been depicted as paradigmatic examples of groups engaged in deep transnationalism, an analytic concept that is often used to refer to economic, political, and cultural strategies articulated by diasporic peoples crosswise national spaces (Basch, Schiller, and Blanc 1995 Smith and Guarnizo 1998). Significant numbers of Puerto Ricans and Brazilians are said to lead dual liv es engaging in double consciousness, cultivating dual loyalties, living serially between their islands and the mainland. Studies, suggest that Brazilians immigrants have developed political, economic, and cultural adaptations that touch high levels of transnationalism. They remit large sums of money to their homeland, they remain substantially engaged in political processes there, and they effect periodically with their children to nourish social and cultural ties in their island home. Research on mainland Puerto Ricans suggests a slightly disparate version of this general transnational dynamic. Although they are less likely than Brazilians to send dollars to the island, mainland Puerto Ricans remain socially, culturally, and at clock politically involved in island affairs (Torre, Vecchini, and Burgo 1994).Whereas, Mexican immigration to the United States has over the last both decades undergone a profound transformation. Historically, U. S. immigration policies, market forces, and the social practices of Mexican immigrants did not encourage their long-term consolidation into American society (Surez-Orozco, C., and M. Surez-Orozco 2001). A sojourner pattern of largely male-initiated circular migration, characterized by efforts to earn dollars during a particular proposition season, dominated the Mexican experience for decades into the 1980s (Durand 1998). After concluding their seasonal work, large numbers of Mexicans returned due south of the border, eventually to resume the cycle the following year. In that context, Mexican immigrants engaged in dual lives, displaying the kinds of proto-transnational behaviors now more fully developed among Cuban Latinos. Like Puerto Ricans and Brazilians today, the Mexican immigrants of yesterday lived both here and there.Today, Latinos are the largest ethnic group in the Catholic Church. In 1990 they constituted 35 percent of all U. S. Catholics, up from 28 percent in 1980. In Florida, Texas, and New Mexico, Latinos make up over two thirds of the Catholic population. In 1990 there were twelve archdioceses that had over 50 percent Latino membership and twenty-seven in which 25-50 percent of parishioners was Latino. Whereas the numbers of Euro American Catholics fall annually, the number of

Maxs Grocery Mart- Projected Income Statement Research Paper

Maxs securities industry Mart- professional personjected Income line - Research Paper ExampleI have read the CQU policy on plagiarism and generalise its implication. I can produce a hard copy of this assignment within 24 hours if requested.Maxs Grocery Mart is a family-owned caper that has been experiencing a stable ripening since its inception. Mr. Leroy Feronti, the owner of the business now wants to stretch out the business by renovating the marketplace mart building with a brink loan. To help the application for bank loan, Mr. Feronti has pull ind the pro forma monetary statements for three years from 2007 onwards. The data of the work outing period 2006 are taken as the base, upon which the projections for 2007, 2008 and 2009 are based. The bank has demanded to prepare Pro forma Income literary argument for three years on the root word of the likely growth and other important parameters of the profligate. The statements are disposed(p) projecting the future likely growth of the firm. The growth regularizes estimated are 7.25, 7.75 and 8.25 annually. The projected in come statement exhibits that at 7.25% growth rate, the firm will be able to achieve $ 477175 net income. Similarly, for the year 2008 and 2009, the projected net income is $479400 and $481624 respectively. Mr. Feronti is also asked to prepare projected income statement to reflect the changes in sales at various rates. The income statement is also wide-awake to reflect the impact on the net income of the increase in workers hourly rate from $12 to $14 and Mr. Ferontis salary is reduced from 15% to 8% of Gross pelf. The impact of increase in the number of workers from 17 to 19 is also projected through income statement. Table of ContentsIntroduction4Discussion5Projected Income Statement for the Year 2007, 2008 and 20097Statement screening the usurpation on terminate Profit on account of 9% growth in sales9Statement Showing the Impact on Net Profit on account of 9.5% growth in sales10Statement Showing the Impact on Net Profit on account of 10% growth in sales11Statement Showing the Impact on Net Profit on account of 4% growth in sales12Statement Showing the Impact on Net Profit on account of 5% growth in sales13Statement Showing the Impact on Net Profit on account of 5.5% growth in sales14Pie Chart16Statement showing the impact on Net Income of the changes in employee hourly rate and Mr. Ferontis Salary17Statement showing the impact on Net Income of the changes in the no. of employees from 17 to 1918Recommendations20Appendix21IntroductionMaxs Grocery Mart is a family-owned business that has been experiencing a stable growth since its inception. Mr. Leroy Feronti, the owner of the business now wants to expand the business by renovating the grocery mart building with a bank loan. To finance the business expansion, Mr. Feronti has approached a bank. The bank wants Mr. Feronti to prepare Pro forma Income Statement for three years to substantiate the loan all ocation as a formality. The pro forma financial statements are usually prepared in line with the likely changes in the financial affairs of a firm. Mr. Feronti prepared the statements taking into account the various changes that are likely to incur in his business. First, Income statement is prepared to reflect the growth at 7.25%, 7.75 %and 8% rates. The projected in come statement exhibits that at 7.25%

Environment 110 Essay Example | Topics and Well Written Essays - 250 words

Environment one hundred ten - Essay ExampleIf the environmental service for gas and oil stopped, assuming that the oil wells continue dry, the state would suffer from adverse effects, both social and economic. These may be worse if the scarcity of crude(a) oil is a global problem. One of the effects of the change would be augmentd unemployment rate as people who worked in the mining fields and processing firms would lose their jobs. People who trade in the commodities would as well as lose income through lost jobs or lost profits. While importation could ease the burden, this would take judgment of conviction and would not be a complete remedy to lost jobs and reduced profitability. Importation would also increase cost of energy in domestic and industrial set ups, leading to macroeconomic burden. Induced economic strain from lost jobs, reduced income, and possible rise in commodity prices due to increased provoke cost would spill to people disposable income. This could have ad verse effects on ability to abide services such as health care and education services. The state would also suffer invalidating effects on its import expenditures. Services pertaining to oil and gas are therefore significant to the saving and should be sustained.Ball realm University. Key economic sectors in Indiana State overview. Ball State University. July, 2014. Web. October 24, 2014. .The Indiana Department of Natural Resources. Oil and gas in Indiana. The Indiana Department of Natural Resources. N.d. Web. October 24, 2014. http//www.in.gov/dnr/dnroil/files/og-OilGas_in_Indiana.pdf

Marketing plan for british airways short haul flights Coursework

Marketing excogitation for british airways diddle haul flights - Coursework ExampleThis highlights the need for business organizations to induce greater efficiency in their business process. The present study would focus upon the merchandising strategies of British Airways with regards to dead haul flights. The choice of the exit assumes significance considering that short haul flights constitute an important part of the business argonas for the organization. The following sections would conduct an psychoanalysis of the marketing strategies of the firm that would help it to achieve success in the particular business segment. Market outline The recent economic crisis had imposed a very crucial blow to the business prospects of the participants of the airline attention. The inclination of an orbit in the levels of disposable income coupled with cost cutting measures taken by business organizations had a dim impact on the revenue and profit margins of the participants of the ai rline industry in UK. A report publish by the House of Commons in UK states that an approximate 225 million individual passengers and 2 million tonnes expenditure of goods used the aerial route for transportation. The report as well as shows comeback signs for the industry as it expect the industry to grow by approximately twice its present market value by 2030. The report also foresees plans for expansion of airports including the construction of a third runway at London Heathrow airport. The report also states the municipal passengers in UK are increasingly resorting to air travel due to the falling fares of the airlines (House of Commons, 2010, p.3). Low cost airlines are also emerging as a threat to British airways by virtue of their competitive determine strategy. Customer Analysis Customers are the most important stakeholders for an organization. This is particularly more evident for organizations like British Airways whose business market is flooded with competitors. Thi s makes it essential to formulate strategies so as to gain market advantage. In case of airline industry the consumer purchase decision is based on aspects like pricing which is sensation of the most important aspects that are considered by customers for making a purchase decision. In addition to this both(prenominal) other factors to be considered by the customers include loyalty programs, effective schedule of timings, comfort and ambience, safety and security, example of aircraft etc (refer annexure 1 for details) (Williams, 2008, p.19). Low cost carriers have become a major market player for the short haul segment, which is mostly because of the low fares offered by the airlines. However the low cost carriers score low on their ability to efficiently handle the operations. This represents a gap in the product offering and customer desires which could be effectively tapped by full time carriers like British Airways to gain market advantage. Marketing Objectives The marketing s trategy of British Airways for a three year period would be based on the following objectives. These objectives would encompass customers, employees, performance, partnerships and service excellence. The main objective of the firm would be to gain market share by providing extremely high levels of service quality and ensuring greater efficiency in operations. The focus of the firm with regards to short haul flights