use computer operating systems and hardware

... ways: – Rename – Copy – Move – Delete 4 Chapter 4: Operating Systems and File Management 11 The Boot Process 4 SECTION B Chapter 4: Operating Systems and File Management 12 Today’s Operating Systems Today’s Operating Systems  Microsoft ... clusters 4 Chapter 4: Operating Systems and File Management 9 User Interfaces  Menus, submenus, and dialog boxes 4 Chapter 4: Operating Systems and File Management 25 File Formats  Windows uses a file ... Management  Section E: Backup Security Operating Systems Operating Systems and File Management and File Management Chapter 4 Chapter 4 4 Chapter 4: Operating Systems and File Management 47 Data File...

Ngày tải lên: 06/03/2014, 09:21

... USA xiv Operating Systems research is a vital and dynamic eld. Even young computer science students know that Operating Systems are the core of any computer system and a course about Operating Systems ... “rings” and numbered as 0,1,2,3 whereas 0 is the most privileged ring and 3 is the least privileged. Linux uses just ring 0 and 3. Ring 0 is used when the kernel is executed, whereas 3 is used ... students to research this eld and to contribute their aptitude. A probe of recent operating systems conferences and journals focusing on the “pure” Operating Systems subjects (i.e. Kernel’s...

Ngày tải lên: 19/03/2014, 13:32

... MSSV:08520470 Sau đây là bài dịch chương II trong sách “Principles of Digital Communication Systems and Computer Networks” của nhóm em. Phần I – Các hệ thống truyền thông số (Digital Communation ... entropy là H = 4.07 bit/ký hiệu Lưu ý: Hãy xem xét câu sau: "I do not knw wheter this is undrstandble." Mặc dù thực tế là một số chữ cái là mất tích trong câu này nhưng bạn vẫn có thể làm...

Ngày tải lên: 18/09/2012, 10:13

... program. 16 Dynamical Systems and Figure 1.2-12 Mach 10. Computer graphics in, computer art out. In the next chapter we will explain the relation between experimental mathematics and computer graphics. ... graphical methods are used to achieve this. charts and pie-charts, as well as coordinate systems with curves, are widespread examples. In most cases not only is a picture ‘worth a thousand words’: the ... mathematics and computer graphics, we will show you some of these computer graphics. Soon you will be producing these, or similar, graphics for yourself. Whether they can be described as computer...

Ngày tải lên: 26/10/2013, 17:15

... abilities and our patience, our WOZ experiments pointed the way to a more user-friendly computer science model: the multi-processing operating system. In UNIX-flavored systems, the user may have ... foreground and background narratives, in same way as the fg and bg console commands can swap UNIX foreground and background processes, 3 a background narrative can always create an “interrupt,” demanding attention ... story of military arrogance; and, (e) a deteriorating situation at base command, where demands on men and equipment may mean a shortage of relief troops, ground vehicles, and helicopters. On their...

Ngày tải lên: 16/03/2014, 17:20

... file, and seconds is the elapsed time. The parameters are explained in the text. User program and data User program and data Operating System Address 0xFFFFFFFF Limit Base 0 (a) User-2 data User-1 ... CPU. 1 INTRODUCTION 1.1 WHAT IS AN OPERATING SYSTEM? 1.2 HISTORY OF OPERATING SYSTEMS 1.3 THE OPERATING SYSTEM ZOO 1.4 COMPUTER HARDWARE REVIEW 1.5 OPERATING SYSTEM CONCEPTS 1.6 SYSTEM CALLS 1.7 OPERATING SYSTEM ... access memory between the base and the limit. (b) Use of two base-limit pairs. The program code is between Base-1 and Limit-1 whereas the data are between Base-2 and Limit-2. Client process Client process Process server Terminal server File server Memory server Microkernel User...

Ngày tải lên: 28/04/2014, 16:35

... 2-22. Entering and leaving a critical region using the TSL instruction. Multiple user threads on a kernel thread User space Kernel space Kernel thread Kernel Fig. 2-14. Multiplexing user-level threads ... of mutex lock and mutex unlock. 2 PROCESSES AND THREADS 2.1 PROCESSES 2.2 THREADS 2.3 INTERPROCESS COMMUNICATION 2.4 CLASSICAL IPC PROBLEMS 2.5 SCHEDULING 2.6 RESEARCH ON PROCESSES AND THREADS 2.7 ... access * / } } Fig. 2-34. A solution to the readers and writers problem. Barrier Barrier Barrier A A A B B B C C D D D Time Time Time Process (a) (b) (c) C Fig. 2-30. Use of a barrier. (a) Processes approaching...

Ngày tải lên: 28/04/2014, 16:35

... process A(void) { down(&resource 1); down(&resource 1); use resource 1( ); down(&resource 2); up(&resource 1); use both resources( ); } up(&resource 2); up(&resource 1); } (a) ... { down(&resource 1); down(&resource 1); down(&resource 2); down(&resource 2); use both resources( ); use both resources( ); up(&resource 2); up(&resource 2); up(&resource 1); ... { down(&resource 1); down(&resource 2); down(&resource 2); down(&resource 1); use both resources( ); use both resources( ); up(&resource 2); up(&resource 1); up(&resource 1);...

Ngày tải lên: 28/04/2014, 16:35

... t. (a) Operating system A (b) Operating system A B (c) Operating system A B C (d) Time Operating system B C (e) D Operating system B C (f) D Operating system C (g) D Operating system A C Fig. 4-5. Memory allocation changes as processes come into memory and leave it. ... it. The shaded regions are unused memory. Disk Main memory External pager Fault handler User process MMU handler 1. Page fault 6. Map page in 5. Here is page User space Kernel space 2. Needed page 4. ... the set of pages used by the k most recent memory references. The function w(k, t) is the size of the working set at time t. (a) Operating system A (b) Operating system A B (c) Operating system A B C (d) Time Operating system B C (e) D Operating system B C (f) D Operating system C (g) D Operating system A C Fig....

Ngày tải lên: 28/04/2014, 16:35

... I/O completed Perform I/O operation User processes Device-independent software Device drivers Interrupt handlers Hardware Fig. 5-16. Layers of the I/O system and the main functions of each layer. 0 0 1 2 3 4 5 6 7 12 ... (a) Separate I/O and memory space. (b) Memory-mapped I/O. (c) Hybrid. Spiral groove Pit Land 2K block of user data Fig. 5-20. Recording structure of a compact disc or CD-ROM. User-level I/O software Device-independent ... box represents one pixel. Operating system Operating system Disk driver Printer driver Keyboard driver Disk driver Printer driver Keyboard driver (a) (b) Fig. 5-13. (a) Without a standard driver interface....

Ngày tải lên: 28/04/2014, 16:35

... in Windows 98. 6 FILE SYSTEMS 6.1 FILES 6.2 DIRECTORIES 6.3 FILE SYSTEM IMPLEMENTATION 6.4 EXAMPLE FILE SYSTEMS 6.5 RESEARCH ON FILE SYSTEMS 6.6 SUMMARY User directory User subdirectories C C C C ... pointers to free disk blocks in memory and three blocks of pointers on disk. (b) Result of free- ing a three-block file. (c) An alternative strategy for handling the three free blocks. The shaded ... 0 0123456789101112131415 Block number Blocks in use 0 0 1 0 1 0 0 0 0 1 1 0 0 0 1 1 Free blocks (a) 1 1 0 1 0 1 1 1 1 0 0 1 1 1 0 0 0123456789101112131415 Blocks in use 0 0 1 0 2 0 0 0 0 1 1 0 0 0 1 1 Free...

Ngày tải lên: 28/04/2014, 16:35

... blocks are read from disk Fig. 7-19. Optimal frame placement for near video on demand. 7 MULTIMEDIA OPERATING SYSTEMS 7.1 INTRODUCTION TO MULTIMEDIA 7.2 MULTIMEDIA FILES 7.3 VIDEO COMPRESSION 7.4 ... demand using different local distribution tech- nologies. (a) ADSL. (b) Cable TV. 10 sec 1 min 2 min 3 min 4 min 0 1 8 0 0 3 6 0 0 5 4 0 0 1 8 0 0 3 6 0 0 5 4 0 0 7 2 0 0 7 2 0 0 User 1 0 User ... sec later Time 0 1 8 0 0 3 6 0 0 5 4 0 0 7 2 0 0 User 1 User 2 Runs faster Normal speed (a) (b) Runs slower Normal speed 5 4 0 0 7 2 0 0 1 8 0 0 3 6 0 0 0 Fig. 7-23. (a) Two users watching the same movie 10...

Ngày tải lên: 28/04/2014, 16:35

... double torus. (e) A cube. (f) A 4D hypercube. Runs users and shared OS CPU 1 Runs users and shared OS CPU 2 Runs users and shared OS CPU 3 Runs users and shared OS OS CPU 4 Memory I/O Locks Bus Fig. ... Accumulation of packet headers. 8 MULTIPLE PROCESSOR SYSTEMS 8.1 MULTIPROCESSORS 8.2 MULTICOMPUTERS 8.3 DISTRIBUTED SYSTEMS 8.4 RESEARCH ON MULTIPLE PROCESSOR SYSTEMS 8.5 SUMMARY Node 1 Node 2 CPUCPU Switch 7 2 3 4 5 6 11000000 10000000 Bit ... gray. Master runs OS CPU 1 Slave runs user processes CPU 2 Slave runs user processes CPU 3 User processes OS CPU 4 Memory I/O Bus Slave runs user processes Fig. 8-8. A master-slave multiprocessor model. A...

Ngày tải lên: 28/04/2014, 16:35

Ngày tải lên: 28/04/2014, 16:35

Ngày tải lên: 28/04/2014, 16:35

Ngày tải lên: 28/04/2014, 16:35

Ngày tải lên: 28/04/2014, 16:35

Ngày tải lên: 30/05/2014, 10:12

Ngày tải lên: 05/06/2014, 11:48