system unit of computer pdf

... Address of disk block 0 Address of disk block 1 Address of disk block 2 Address of disk block 3 Address of disk block 4 Address of disk block 5 Address of disk block 6 Address of ... length Number of bytes in a record Key position Offset of the key within each record Key length Number of bytes in the key field Creation time Date and time the file was created Time of last access ... 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 Extension Meaning file.bak

Ngày tải lên: 28/04/2014, 16:35

... Run-time system Run-time system Run-time system Run-time system Run-time system Run-time system Operating system Operating system Operating system Operating system Operating system ... Ethernet Headers Fig 8- 32 Accumulation of packet headers Message Uni versi of North South ty School of Humanities School of Sciences School of Social Sciences Science Northern University ... Distributed System Complete computer Full set per node Possibly worldwide Traditional network Possibly all different Each node has own Many organizations Fig 8- 27 Comparison of three kinds of

Ngày tải lên: 28/04/2014, 16:35

... Sort a file of lines alphabetically tail Extract the last lines of a file tr Translate between character sets Fig. 10-2. A few of the common UNIX utility programs required by POSIX. System calls ... are miscellaneous bits, fd is a file descriptor, and offset is a file offset Main memory Core map entry Index of next entry Index of previous entry Page frame 3 Disk block number Disk ... protection information) Number of links to the file Identity of the file’s owner Group the file belongs to File size (in bytes) Creation time Time of last access Time of last modification Fig

Ngày tải lên: 28/04/2014, 16:35

... printers Software User preferences for Microsoft and third party software HKEY PERFORMANCE DATA Hundreds of counters monitoring system performance HKEY CLASSES ROOT Link to HKEY LOCAL MACHINE\SOFTWARE\CLASSES ... information for users SECURITY System-wide security policies SOFTWARE Generic information about installed application programs SYSTEM Information for booting the system HKEY USERS Information ... programs to run on almost all versions of Windows. Key Description HKEY LOCAL MACHINE Properties of the hardware and software HARDWARE Hardware description and mapping of hardware to drivers SAM Security

Ngày tải lên: 28/04/2014, 16:35

... employees of the University are members of the Public Employees' Retirement System (PERS), Game Wardens' & Peace Officers' Retirement System (GWPORS), Teachers' Retirement System ... state police officers not eligible to join the Sheriffs' Retirement System, Highway Patrol Officers' Retirement System, and Municipal Police Officers' Retirement System. TRS, ... persons employed as teachers or professional staff of any public elementary or secondary school, or unit of the University System. This is trial version www.adultpdf.com Notes to the Consolidated

Ngày tải lên: 18/06/2014, 20:20

... JOURNAL OF NEUROENGINEERING AND REHABILITATION Brain-computer interfacing using modulations of alpha activity induced by covert shifts of attention Treder et al. Treder et al. Journal of NeuroEngineering ... rhythm based predictor of BCI performance In light of the availability of numerous BCI systems and the fact some users do not obtain significant BCI con- trol, prediction of BCI performance using ... al.: Brain-computer interfacing using modulations of alpha activity induced by covert shifts of attention. Journal of NeuroEngineering and Rehabilitation 2011 8:24. Treder et al. Journal of NeuroEngineering

Ngày tải lên: 19/06/2014, 08:20

... 1 of the 21 units from 19 different hospitals in 7 different countries of Western Europe and Israel, between November 3, 2004 and May 30, 2006. The number of ICU beds of the participating units ... studies have investigated the impact of hypoglycemia on the cost of care of critically ill patients. The purpose of this study was to evaluate the impact of hypoglycemia, defined as BG < ... cost of treating intensive care unit (ICU) patients is enormous. It has been estimated that 0.5–1.0% of the United States Gross Domestic Product is consumed in the ICU, representing 20–30% of

Ngày tải lên: 20/06/2014, 22:20

... a system of two non-linear equations in two real unknowns x and y, u (x, y) = 0, v (x, y) = 0 Which can be solved using the methods discussed in previous section. Example 6. Find all roots of ... occurs in conjugate pair. Therefore we extract the quadratic factors that are the products of the pairs of 92 COMPUTER BASED NUMERICAL AND STATISTICAL TECHNIQUES complex roots, and then complex arithmetic ... gives a pair of complex roots or a pair of real roots. Let us divide the given polynomial p n (x) by a quadratic factor x 2 + px + q, we obtain a quotient polynomial Q n–2 (x) of degree (n–2)

Ngày tải lên: 04/07/2014, 15:20

... of x in the given range. However if the function f is not known, the value of y can be obtained, when a set of values of x is given. The method to find out such values is based on principle of ... independent variable of function y = f(x). To determine the values of function y = f(x) for given intermediate or argument values of x, three types of differences are useful: 104 CALCULUS OF FINITE DIFFERENCES ... roots and multiple roots of polynomials and also for determining the Eigen values of a matrix. An important feature of the method is that it gives approximate values of all the roots simultaneously

Ngày tải lên: 04/07/2014, 15:20

... y = 1 3 . Therefore mean of x-series is 5 and mean of y-series is 1 3 . Now, let the line of regression of x on y be 3x + 12y = 19 Then, the line of regression of y on x is 3y + 9x = 46. Therefore ... 3.67.y = Therefore, mean of x-series = 15.94 And mean of y-series = 3.67 Now, the line of regression of y on x is: 11.64 0.50yx=− ∴ 0.50 yx b =− Also, the line of regresson x on y is: ... The equations of two lines of regression are: 3x + 12y = 19 and 3y + 9x = 46. Find 418 COMPUTER BASED NUMERICAL AND STATISTICAL TECHNIQUES (i) the mean of x-series (ii) the mean of y-series (iii)

Ngày tải lên: 04/07/2014, 15:20

... expenses and profit per unit. Commodity A Commodity B 40 units 30 units Items Total (Rs.) Per Unit (Rs.) Total (Rs.) Per Unit (Rs.) Value of raw material 52 1.3 50 1.6 Other expenses of production ... Price per unit Rs. 4 Rs. 5 Quantity sold 40 units 30 units Value of raw material Rs. 52 Rs. 50 Other expenses of production Rs. 64 Rs. 60 Profits Rs. 44 Rs. 40 Sol. Let us calculate the cost of material, ... 60 2.0 Profits 44 1.1 40 1.4 Costs and Profits per unit of Commodity A & B 180 160 140 120 100 80 60 40 20 0 Co m m o d i t y A Co m m o d i t y B Profits Other expenses Value of raw material

Ngày tải lên: 04/07/2014, 15:20

... Enter the no. of term –7 Enter the value in form of x– Enter the value of x1 – 1.00 Enter the value of x2 – 1.05 Enter the value of x3 – 1.10 Enter the value of x4 – 1.15 Enter the value of x5 – 1.20 ... value of x6 – 1.25 Enter the value of x7 – 1.30 Enter the value in the form of y– Enter the value of y1 – 2.7183 Enter the value of y2 – 2.8577 Enter the value of y3 – 3.0042 Enter the value of ... Enter the no. of term –7 Enter the value in form of x Enter the value of x1 – .61 Enter the value of x2 – .62 Enter the value of x3 – .63 Enter the value of x4 – .64 Enter the value of x5 – .65

Ngày tải lên: 04/07/2014, 15:20

... formal models of kernels; Horning’s... argued, is detailed descriptions of new systems1 The formal specification and derivation of operating system kernels is also of clear benefit ... systems are, arguably, the most critical part of any computer system The kernel manages the computational resources used by applications Recent episodes have shown that the operating system ... was one of the reasons for writing [10 ] In addition to that book, formal models and proofs were used by the author as a way of exploring...List of Figures 1. 1 The layers of the

Ngày tải lên: 23/07/2014, 23:20

... global burden of pneumonia, the increasing number of antibiotic- resistant bacteria, and the emergence of new pulmonary pathogens into account, an exact analysis of molecular mechanisms of disease ... doglycans of basically all bacteria [117,118]. However, as for many of the TLRs and their agonists, there is no formal proof for the binding of the peptidoglycan motifs to the LRR domains of NOD1 ... induced the expression of RIG-I in A549 cells. Expression of dominant-negative form of RIG-I inhibited influenza A virus-related activation of an IFNβ promoter suggesting a role of lung epithelial

Ngày tải lên: 12/08/2014, 16:20

... and to their peace of mind, regardless of the quality of their locks Software professionals should never condone the spreading of viruses, Trojan horses, or worms The ACM Code of Ethics provides ... products of professional work 2.2 Acquire and maintain professional competence 2.5 Give comprehensive and thorough evaluations of computer systems and their impacts, including analysis of possible ... pertaining to professional work 3.3 Acknowledge and support proper and authorized uses of computing resources CAN COMPUTERS KILL? In particular, can software kill? Can software maim? Can software inflict

Ngày tải lên: 12/08/2014, 21:22

... notion. – Section 6.2 explains the basic principles of system design and why state is an essential part of system design. It also gives first definitions of component-based programming and object-oriented ... the effect of explicit state on building secure abstract data types. – Section 6.5 gives an overview of some useful stateful ADTs, namely collections of items. It explains the trade-offs of expressiveness ... case Xs of nil then S [] X|Xr then {SumList Xr X+S} end end It is recursive. Each call has two arguments: Xs, the unexamined rest of the input list, and S, the sum of the examined part of the

Ngày tải lên: 14/08/2014, 10:22

... chapter. It consists of a set of threads accessing a set of shared passive objects. The threads coordinate among each other when accessing the shared objects. They do this by means of coarse-grained ... versions of Figure 8. 8 and 8. 10 are reasonable Figure 8. 8’s use of a lock... and DeleteNonBlock This gives the definition of Figure 8. 17 This queue is a good example of why reentrant ... Section 8.3 introduces the concept of lock, which is the basic concept used to create coarse-grained atomic actions. A lock defines an area of the program inside of which only a single thread can

Ngày tải lên: 14/08/2014, 10:22

... constant, i.e. into level sets of g.Ð/, called solution blocks. On each of these solution blocks, the value of g.Ð/ is the weighted average of the value of x. p/ over the set of prices within the block, ... Agent (IA), that is, a piece of software residing at the user side. Such an agent can take on the job of constantly maintaining a good level of the user’s net benefit. Of course, the user should ... for a problem of maximizing the sum of users’ utilities minus a sum of congestion c osts on the links, x r should decrease at a rate that depends upon x r times the derivative of the cost on

Ngày tải lên: 14/08/2014, 12:20

... looking for factorial factorial of 0 is 1 factorial of 1 is 1 factorial of 2 is 2 factorial of 3 is 6 factorial of 4 is 24 of of of of of 4 3 2 1 0 Any iterative (repetitive) program ... the normal way of expressing... your own computer remote located on a computer far away from the user Contrast LOCAL Remote Desktop a feature of some versions of Microsoft Windows that ... proper functioning of the program depends on the amount of time consumed. For instance, computers that control automatic machinery must often both detect and introduce time delays of accurately determined

Ngày tải lên: 14/08/2014, 17:21

... and add OFFSET START_CODE - OFFSET VIRUS to it, moving the file pointer with respect to the beginning of the file: xor lea add mov int cx,cx dx,[bp+1AH] dx,OFFSET START_CODE - OFFSET VIRUS ... (Addison-Wesley, 1991) 90 The Giant Black Book of Computer Viruses mov mov mov mov add mov repz ret di,OFFSET INT _21 + IVOFS bp,sp si,[bp] bp,si si,OFFSET INT _21 - 103H cx,10 cmpsb ;di points ... in combination with an absolute offset. For example, the code: call GET_ADDR ;put OFFSET GET_ADDR on stack GET_ADDR: pop di ;get that offset into di sub di,OFFSET GET_ADDR ;subtract compiled

Ngày tải lên: 14/08/2014, 18:22