Tuesday, January 28, 2020

Major Trends Which Affect Microprocessor Information Technology Essay

Major Trends Which Affect Microprocessor Information Technology Essay In the first section I selected the question about Memory Management Unit of Linux operation system. In this section I described the strategies and mechanism used by Memory Management, problems faced by these techniques and solutions to overcome it. In the section number two I chose the question about microprocessor. This question discussed how microprocessors work, major trends affecting to their performance, differences between microprocessors design goals for laptops, servers, desktops and embedded systems. 2 Section1: Linux Operating System Introduction Linux, one of the free open source operating system does sufficient memory management activities to keep the system stable and users demand for errors free. As processes and threads executes, they read instructions from memory and decode it. In such act, instructions would be fetched or store contents of a location in a memory. Then, the processor would execute the instructions which in either way the memory would be accessed in fetching instructions or storing the data. Linux uses a copy-on-write scheme. If two or more programs are using the same block of memory, only one copy is actually in RAM, and all the programs read the same block. If one program writes to that block, then a copy is made for just that program. All other programs still share the same memory. Linux handles memory in such a way that when RAM is not in use, the operating system uses it as disk cache. Below diagram illustrate a brief overview of Linux operating system. C:UsersuserDesktopimages.jpg 3 Memory Management The term memory management refers to the one of the most important parts of the operating system. It consider in provision of memory-related services to applications. These services include virtual memory (use of a hard disk or other non-RAM storage media to provide additional program memory), protected memory (exclusive access to a region of memory by a process), and shared memory (cooperative access to a region of memory by multiple processes). Linux memory management does use the platform of Memory Management Unit which translate physical memory addresses to liner ones used by the system and page fault interrupt are requested when the processor tries to access to memory that is not entitled to. Virtual Memory Virtual memory of Linux is using a disk as an extension of RAM therefore that the effective size of convenient memory grows respectively. The kernel will write the substance of a currently dormant block of memory to the hard disk so that the memory can be used for another function. When the original contents are necessary again, they are read back into memory. This is all made completely transparent to the user; programs running under Linux only see the larger amount of memory available and dont notice that parts of them reside on the disk from time to time. Obviously, reading and writing the hard disk is slower (on the order of a thousand times slower) than using real memory, so the programs dont run as fast. The part of the hard disk that is used as virtual memory is called the  swap space. Virtual memory system consist of all virtual addresses not physical addresses. These virtual addresses are transformed into physical addresses by the processor based on information held in a set of tables maintained by the operating system. To make this conversion easier, virtual and physical memory are shared into handy sized pieces called pages. These pages are all the same size, if they were different size, the system would be very hard to administer 4 The schemes for Memory Management The simplicity of Linux memory model facilitates program implementation and portability in different systems. There exist two schemes for implementation of memory management in Linux; 1.Paging 2.Swapping Paging Demand Paging Currently, saving is done using physical memory by virtual pages when compiling a program. In latter case when a program runs to query a database, not all database will respond, but only those with data records to be checked. For instance a database request for search query will only be loaded and not database with programs that works to add new records. This is also referred to as demand paging. The purpose of using demand paging is to load performing images into a process of virtual memory. Every time when a command is accomplished, the file containing it is opened and its contents are displayed into the processs virtual memory. Memory mapping is executed by modifying the data structure which is describing this process. Even so the rest of the image is left on disk ,only the first part of the image is actually sent into physical memory. Linux uses memory map to identify parts of image to load into memory by generating page faults as the image executes. 5 C:UsersfoxDesktopmmu-vs-iommu-memory.png Page Faults Page fault exception are generated when a process tries to access an unknown page to memory management unit. The handler goes further in examining the currently running process`s memory information and MMU state, then determines whether the fault is good or bad. As good page faults cause the handler to give more memory to the process, the bad faults invoke the handler to terminate the process. From good page faults are expected behaviour to whenever a program allocates a dynamic memory to run a section of code, write a for the first time a section of data or increases its stack size. In such a case when a process tries to access this newly memory, page fault is declared by MMU and the system adds a fresh page of memory to the process`s table. The interrupted process is the resumed. In cases where a process attempt to access a memory that its doesnt own or follows a NULL pointer then bad faults occur. Additionally, it could also be due to bugs in the kernel in which case the handler w ill print an oops information before terminates/killing the process. 6 Swapping Linux separates its physical RAM (random access memory) into pieces of memory called pages. The process of Swapping is accomplished by copying a page of memory to the preconfigured space on the hard disk, known as a swap space, to exempt that page of memory. The combined sizes of the physical memory and the swap space is the amount of virtual memory available. Swapping is done mainly for two reasons; One is insufficient memory required by the system when physical memory is not available. The kernel does swaps out the less used pages and supply the resources to currently running processes. Second, a significant number of the pages used by an application during its start-up phase may only be used for initialization and then never used again. The system can swap out those pages and free the memory for other applications or even for the disk cache. Nevertheless, swapping does have a disadvantage. If Compare with memory, disks are very slow. For example, memory speeds are measured in nanoseconds, but disks are measured in milliseconds, so admittance to the physical memory can be significantly faster than accessing disk. It depends how often swapping occurs, if it happens frequently your system will be slower. Sometimes excessive swapping or thrashing occurs where a page is swapped out and then very soon swapped in and then swapped out again and so on. In such situations the system is struggling to find free memory and keep applications running at the same time. In this case only adding more RAM will help. There are two forms of swap space: the swap partition and the swap file. The swap partition is a substantive section of the hard disk which is used only for swapping; other files cannot locate there. A special file in the file system which stands amongst your system and data files called a swap file. 7 Problems of virtual memory management in Linux There are several possible problems with the page replacement algorithm in Linux , which can be listed as follows: à ¢Ã¢â€š ¬Ã‚ ¢ The system may react badly to variable VM load or to load spikes after a period of no VM activity. Since the Kswapd, the page out daemon, only scans when the system is low on memory, the system can end up in a state where some pages have reference bits from the last 5 seconds, while other pages have reference bits from 20 minutes ago. This means that on a load spike the system have no clue which are the right pages to evict from memory, this can lead to a swapping storm, where the wrong pages are evicted and almost immediately after towards faulted back in, leading to the page out of another random page, etc. à ¢Ã¢â€š ¬Ã‚ ¢ There is no method to prevent the possible memory deadlock. With the arrival of journaling and delay allocation file systems it is possible that the systems will need to allocate memory in order to free memory, that is, to write out data so memory can become free. It may be useful to introduce some algorithm to prevent the possible deadlock under extremely low memory situation. Conclusion All in all, Linux memory management seems to be effective than before and this is based on the assumption that Linux has less applications that it runs as to compared to windows machines which has more users and more applications. Beside, the system may react badly to variable VM load However, regular updates from Linux has managed to lessen the bugs. Swapping does require more disk memory in case the physical memory is insufficient to serve more demanding applications and if the disk space is too low the user runs the risk of waiting or kill other process for other programs to work. Additionally, resuming the swapped pages may result into corrupted data, but Linux has been in upper hand to solve such bugs. 8 Frequently Ask Questions What is the main goal of the Memory Management? The Memory Management Unit should be able to decide which process should locate in the main memory; should control the parts of the virtual space of a process which is non-core resident; responsible for monitoring the available main memory and for the writing processes into the swap device in order to provide more processor fit in the main memory at the same time. What is called a page fault? Page fault appear when the process addresses a page in the working set of the process but the process is not able to locate the page in the working set. To overcome this problem kernel should updates the working set by reading the page from the secondary device. What is the Minimum Memory Requirement? Linux needs at least 4MB, and then you will need to use special installation procedures until the disk swap space is installed. Linux will run comfortably in 4MB of RAM, although running GUI apps is impractically slow because they need to swap out to disk. 9 Section 2: Microprocessor Introduction Microprocessor incorporates all or most of the functions of Central Processor Unit (CPU) on a single integrated circuit, so in the world of personal computers, the terms microprocessor and CPU are used interchangeably. The microprocessor is the brain of any computer, whether it is a desktop machine, a server or a laptop. It processes instructions and communicates with outside devices, controlling most of the operation of the computer. How Microprocessors Work Microprocessor Logic A microprocessor performs a collection of machine instructions that tell the processor what to do. A microprocessor does 3 main things based on the instructions: Using its ALU (Arithmetic/Logic Unit), a microprocessor is able to perform mathematical operations like addition, subtraction, multiplication and division. A microprocessor is able to move data from one memory location to another. A microprocessor is able to make decisions and jump to a new set of instructions based on those decisions. 10 The following diagram shows how to extremely simple microprocessor capable of doing of 3 jobs. The microprocessor contains: An address bus that sends an address to memory A data bus that can sends data to memory or receive data from memory A RD (read) and WR (write) line to tell the memory whether to set or get the address A clock line lets a clock pulse sequence the processor A reset line that resets the program counter to zero and restarts execution 11 Here the explanation of components and how they perform: Registers A, B and C are kind of latches that made out of flip-flops The address latch is just like registers A, B and C. The program counter is a latch with the extra capacity to increment by 1 when or reset to zero it is needed. Major trends which affect microprocessor performance and design Increasing number of Cores: A dual-core processor is a  CPU  with two processors or execution cores in the same  integrated circuit. Each processor has its own  cache  and controller, which enables it to function as efficiently as a single processor. However, because the two processors are linked together, they can perform operations up to twice as fast as a single processor can. The Intel Core Duo, the AMD X2, and the dual-core PowerPC G5 are all examples of CPUs that use dual-core technologies. These CPUs each combine two processor cores on a single silicon chip. This is different than a dual processor configuration, in which two physically separate CPUs work together. However, some high-end machines, such as the PowerPC G5 Quad, use two separate dual-core processors together, providing up to four times the performance of a single processor. 12 Reducing size of processor Size of the processor the one of the major trend what is affecting to the processor in last years time. When the processor becoming small there will be many advantages like it can include many cores to a processor, it will protect energy, it will increase its speed also. 45nm Processor Technology Intel has introduced 45nm Technology in Intel Core 2 and Intel Core i7 Processor Family. Intel 45nm High-K Silicon Processors contain Larger L2 Cache than 65nm Processors. 32nm ProcessorTechnology At research level Intel have introduced 32nm processor (Code Name Nehalem- based Westmere) which will be released in 2nd quarter of 2009 Energy saving Energy is one of the most important resources in the world. Therefore we must save and protect it for future purpose. The power consumption in microprocessor would be one of the major trends. For instance, Intel Core 2 family of processors are very efficient processor, they have very intelligent power management features, such à Ã‚ °s, ability to deactivate unused cores; it still draws up to 24 watts in idle mode. 13 High speed cache and buses In Past year Microprocessor Manufactures like Intel has introduced new cache technologies to their processors which can gain more efficiency improvements and reduce latency. Intel Advanced Smart Cache technology is a multicore cache that reduce latency to frequency used data in modern processor the cache size is increased up to 12MB installing a heat sink and microprocessor 14 Differences between Microprocessors Servers Originally the microprocessor for server should give uninterrupted time and stability with low power consumption and less resources allocating processor for System Cache. Thats why most of the time they use Unix and Linux as the Server based operating systems, because they take less amount of hardware resources and use effectively so the heat which dispatches from the processor is less and the heating would be less. Desktop Processors The desktop microprocessors are a bit different from server microprocessors, because they are not very much concerned of power consumption or use less resources of Operation system. The goal of Desktop microprocessors is to deliver as much performance as possible while keeping the cost of the processor low and power consumption within reasonable limits. Another important fact is out there, it is most of the programs which are being used in desktop machines are designed to do long time processor scheduling jobs like rendering a high definition image, or compiling a source file. So the processors are also designed to adopt those kinds of processing. Laptop Processor The CPU produces a lot of heats, in the desktop computers there are a systems of fans, heat sinks, channels and radiators that are uses to cool off the computer. Since laptop has small size, and far less room for any cooling methods, the CPU usually: Runs at a lower voltage and clock speed (reduces heat output and power consumption but slows the processor down) Has a sleep or slow-down mode (when the computer is not in use or when the processor does not need to run as quickly the operation system reduces the CPU speed) 15 Embedded Microprocessors Most of the embedded devices using Microcontrollers instead of separate Microprocessors; they are an implementation of whole computer inside a small thumb size chip called Microcontroller. These microcontrollers are varying its performance due to battery consumption and Instruction length issues. Most of them are designed using RISC architecture to minimize the complexity and the number of instructions per processor. Embedded device processors have high speed potential but the problem they are having is high power consumption and heating. Conclusion Current technology allows for one processor socket to provide access to one logical core. But this approach is expected to change, enabling one processor socket to provide access to two, four, or more processor cores. Future processors will be designed to allow multiple processor cores to be contained inside a single processor module. 16 Frequently Ask Questions: 1. How does the operating system share the cpu in a multitasking system? There are two basic ways of establishing a multitasking environment; times lice and priority based. In a a times lice multitasking environment each application is given a set amount of time (250 milliseconds, 100 milliseconds, etc) to run then the scheduler turns over execution to some other process. In such an environment each READY application takes turns, allowing them to effectively share the CPU. In a priority based environment each application is assigned a priority and the process with the highest priority will be allowed to execute as long as it is ready, meaning that it will run until it needs to wait for some kind of resource such as operator input, disk access or communication. Once a higher priority process is no longer ready, the next higher process will begin execution until it is no longer ready or until the higher priority process takes the processor back. Most real-time operating systems in use today tend to be some kind of combination of the two. 2.What is a multi-core? Two or more independent core combined into a single package composed of a single integrated circuit is known as a multi-core processor. 3. What is the difference between a processor and a microprocessor? generally, processor would be the part of a computer that interprets (and executes) instructions A microprocessor, is a CPU that is in just one IC (chip). For example, the CPU in a PC is in a chip so it can also be referred to as microprocessor. It has come to be called a microprocessor, because in the older days processors would normally be implemented in many ICs, so it was considered quite a feat to include the whole CPU in one chip that they called it a Microprocessor 17

Monday, January 20, 2020

The Material Nature of Spirituality Essay examples -- Spirit Spiritual

The Material Nature of Spirituality It was observed from the 'time to think' experiments done in Biology 103 lab, that thinking is material. Thinking was associated with material changes and activities in the brain and the connected nervous system. This promulgates the brain=behavior notion. According to this notion, all aspects of human behavior and experiences are functions of a material structure, the brain. Who one is, is determined by his or her brain. Nevertheless, many people continue to believe in a 'higher power' that guides and controls human action and behavior. In a sense, religion and spirituality was developed to understand and explore questions about 'who we are' and 'what is the purpose of life'. Whether one is Christian, Jewish, Muslim, Buddhist or Hindu, religious thinking and belief attempt to ground human experiences and thoughts in the spiritual and ethereal. Religious experiences are considered 'otherworldly' and not material. Heightened spiritual behavior through prayer, meditation or yoga is considered to lead to a state of 'transcendence', 'inner peace' or a 'nearness to God' depending on which faith you follow. Hence, the notion of spirituality and religion is based on an ethereal component. However could the ethereal and spiritual be embodied by a material structure, the brain? Recent scientific research has provided observations, which suggest spirituality, and religious experience has a biological basis. Scientific observations suggest there are specific physiological aspects to spiritual behavior like meditation, prayer, and yoga. Many people nowadays follow transcendental meditation, prayer, and yoga to enhance their spiritual and physical well being. These spiritual pra... ...rch/tm_charts/1Phys.html 3) The Effects of Meditation on the Brain Activity , http://members.aol.com/InstSSM/parietal.HTML 4) Searching for the God within,, a past Newsweek article. http://infotrac.galegroup.com/itweb/brynmawr_main?http_rc=400&class=session&sev=temp&type=session&cause=http%3A%2F%2Fweb4.infotrac.galegroup.com%2Fitw%2Finfomark%2F678%2F198%2F19025812w4%2Fpurl%3Drc1_EAIM_0_A69411041%26dyn%3D12!xrn_10_0_A69411041%3Fsw_aep%3Dbrynmawr_main&cont=&msg=No+Session+cookies&sserv=no 5) The Humanizing Brain: Where Religion and Neuroscience Meet, http://infotrac.galegroup.com/itweb/brynmawr_main?http_rc=400&class=session&sev=temp&type=session&cause=http%3A%2F%2Fweb4.infotrac.galegroup.com%2Fitw%2Finfomark%2F678%2F198%2F19025812w4%2Fpurl%3Drc1_EAIM_0_A53739125%26dyn%3D19!xrn_5_0_A53739125%3Fsw_aep%3Dbrynmawr_main&cont=&msg=No+Session+cookies&sserv=no

Sunday, January 12, 2020

Mr fdgsdyusdtgfujer

Provide a rational for a promotional campaign. MM Explain the rationale for the campaign you have just created such as why you chose that specific promotional mix, timing, cost, media mix etc and why it is expected to achieve its goals. For this task you are required to explain and Justify why you have created your campaign (for Task UP) as you have. I suggest you do this one factor at a time*. Your response should be written in sentences and paragraphs. Factor Justify its use Promotional Mix Why have you chosen the specific type of promotion that you have?What are Its advantages over other types of promotion? Do you foresee any problems of using this type of promotion? How can these be overcome? Timing Why have chosen the specific times for your campaign/promotion? Why is this time most appropriate? What other times did you consider? Why were these discounted? Media Mix Why have you chosen the specific forms of media will be used within your campaign? Why Is this? What forms of medi a were considered but discounted? Why were they discounted? Budget Justify the cost of your campaign – why does it cost what it does? Could these costs be reduced?The advert is trying Your next paragraph with demonstration analysis. This will be the flirt half of your analysis that will focus on the success of the campaign (Analysis +). You will need to research how the campaign might have helped the business achieve its aims. Image, profits, sales etc? For each ‘success' you may wish to use PEE (Point, Evidence, Explain). The campaign has helped this business In many ways. 1 OFF their aims by†¦. Another way that it has helped the business is This has helped them achieve their aims by†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ The third paragraph will also be analysis.However here you will focus on any repacks of the campaign (Analysis -). Again, we will need to research this using the internet any negatives that might be associated with the advert. Image, profits, sales etc? For each à ¢â‚¬Ëœdrawback you may wish to use PEE (Point, Evidence, Explain). Unfortunately the campaign also caused some drawbacks. The first drawback caused was†¦ PEE.. This may have prevented them from achieving their aims by†¦.. The second drawback caused was†¦ PEE†¦. This may have prevented them from achieving their aims by†¦.. Your final paragraph will be a support Judgment – your evaluation.From your all of our research and the analysis you have completed was the campaign a success or failure overall? How much of a success or failure? Why? Use the word ‘because' to back up and Justify any Judgments you make. Overall I have found that the campaign was a success/failure. The first reason for this Furthermore†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ Because, because, because†¦.!! Make sure you apply your answer directly to your business and the campaign you have chosen. Use words like moreover, firstly, secondly, furthermore, to compare, I have found, in contrast, to conclude, to summaries, as my research shows†¦Ã¢â‚¬ ¦ If you are uncertain, please see Mr. Quarto.

Friday, January 3, 2020

The Financial Crisis Of The U.s. Auto Industry - 1295 Words

The Problem The year was 2008 and the daily news for Americans could make us choke on our morning coffee. The financial crisis was something out of a movie that could be titled The Horrors from Wall Street. The nasty mortgage mess was having a negative impact on other areas of the economy. The U.S. auto industry was taking a sizeable hit. It became hard to conceive that a legacy industry like 100 year old General Motors could be in deep trouble. But indeed they were and by June, 2009, General Motors filed for bankruptcy. We held a collective sigh as we heard the word â€Å"bailout† for this iconic company. The government bailout came with a carload of stipulations and it was made clear to General Motors that they would have to make extensive changes in order to comply with all requirements. The government car czar, Steve Ratner, and the Obama administration expected executive leadership at General Motors to turn the company around and as soon as possible. With the passage of time, there is detailed analysis available for researching the complexities surrounding the bankruptcy and government bailout of General Motors. Summary of Findings I had two prevailing questions on my mind when I began my research. The first: what historical conditions existed at GM that contributed to bankruptcy and the need for a bailout? The second: how was the bailout was structured and what requirements were placed on GM? Research on the historical conditions a GM lead me to 2012 article fromShow MoreRelatedThe Financial Crisis Of The Troubled Asset Relief Program860 Words   |  4 PagesThe 2008 financial crisis brought panic and fear to the nation as the stock market plunged, reducing the wealth of millions of Americans. The housing market crash put nearly all the major financial institutions in grave danger of insolvency. 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The Financial Crisis Of The U.s. Auto Industry - 1295 Words

The Problem The year was 2008 and the daily news for Americans could make us choke on our morning coffee. The financial crisis was something out of a movie that could be titled The Horrors from Wall Street. The nasty mortgage mess was having a negative impact on other areas of the economy. The U.S. auto industry was taking a sizeable hit. It became hard to conceive that a legacy industry like 100 year old General Motors could be in deep trouble. But indeed they were and by June, 2009, General Motors filed for bankruptcy. We held a collective sigh as we heard the word â€Å"bailout† for this iconic company. The government bailout came with a carload of stipulations and it was made clear to General Motors that they would have to make extensive changes in order to comply with all requirements. The government car czar, Steve Ratner, and the Obama administration expected executive leadership at General Motors to turn the company around and as soon as possible. With the passage of time, there is detailed analysis available for researching the complexities surrounding the bankruptcy and government bailout of General Motors. Summary of Findings I had two prevailing questions on my mind when I began my research. The first: what historical conditions existed at GM that contributed to bankruptcy and the need for a bailout? The second: how was the bailout was structured and what requirements were placed on GM? Research on the historical conditions a GM lead me to 2012 article fromShow MoreRelatedThe Financial Crisis Of The Troubled Asset Relief Program860 Words   |  4 PagesThe 2008 financial crisis brought panic and fear to the nation as the stock market plunged, reducing the wealth of millions of Americans. The housing market crash put nearly all the major financial institutions in grave danger of insolvency. The government reacted quickly to not only stop the bleeding and devastation but also to restore confidence in the financial system and reassure the public the economy wasn’t in a free fall. This was not a time to sit back and let the market self-adjust. UnderRead MoreEssay on Corporate Bailout and the Law1286 Words   |  6 Pagesof the 2008-2009 financial crises, the largest ever since the Great Depression of the 1930s, witnessed the near collapse of multibillion-dollar industries in the United States. Concerns over the economic impact of the possible collapse of these industries compelled the then administration and Members of Congress to seek legislative options to salvage them. Consequently, two of the industry biggest players in the auto industries, General Motors and Chrysler, were offered financial support by the governmentRead More2009 Chrysler Fiat Strategic Alliance - Essay1034 Words   |  5 Pages2009 Chrysler-Fiat strategic alliance, its current issues, and future viability in the global auto industry. The new landscape of the American auto industry and the role of Fiat is analyzed in the cross-border tie-up. After de-merging with Daimler in 2007, Chrysler did not do well because of the 2008-2009 global financial cris is and its bankruptcy filing. Chrysler’s other problems included its financial constraints and heightened competition in North America. The company had no choice but to lookRead MoreA Brief Note On The American Auto Industry861 Words   |  4 Pagesthe American auto industry bloomed in the United States leading to hundreds of manufactures. Come 1920’s there were three main auto manufactures known as the â€Å"big three† (2015, Wikipedia). Those three manufactures are Ford, General Motors and Chrysler. Global competition started to cut into the American auto market come the 1970s. The international auto market combined with oil prices and economic crisis continue to affect the American auto market. Overall the American auto industry has experiencedRead MoreCase Study : The Auto Bailout1383 Words   |  6 Pages 1. The Auto Bailout Daniel Levi, in his book, Group Dynamics for Teams, declares that â€Å"a team is a special type of group in which people work interdependently to accomplish a goal† (1). Near the end of 2008, Chrysler and General Motors were in need of help because they confessed to the world that they were in danger of financially collapsing, thus the US auto bailout was created. The task force was brought forth by the Obama administration to help Chrysler and General Motors overcome their financialRead MorePestel: Electric Vehicle and Tesla Motors Essay807 Words   |  4 PagesCase 5 Tesla Motors and U.S. Auto Industry As a pioneer of green technology car manufactory, Tesla Motors has placed himself in the U.S. automotive industry. Tesla Roadster is considered to be a cash cow in 2009, and it is the only electric cars have been mass product. However, after the competitors had entered the market, alternatives joined the battle of green technology car, such as hybrids, fuel cell ,etc. Furthermore external environment has changed. Elon Musk, the co-founder and head ofRead MoreThe Effect of a Struggling Economy on the Auto Industry Essay1430 Words   |  6 PagesIntroduction When the â€Å"Sub-Prime Mortgage Crisis† began in 2008, it triggered a global recession. 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