operating system principles by silberschatz galvin gagne ppt

... multithreaded operating system and a very efficient one. While programmers can explicitly create threads, much of the work of handling threads is taken care of behind the scenes by the operating system ... window) is taken care of by the operating system. You’ll be even more pleased to find that for some system messages, even the window’s response to the message is handled by the BeOS. For instance, ... and moving of windows is handled by the system, not by the SimpleApp code. This simple demonstration emphasizes the power of the BeOS system software—it is the system software code (rather than...

Ngày tải lên: 26/01/2014, 07:20

... the control (typically by clicking on it, as for a button), the system passes the applica- tion-defined message to the window. How the window handles the message is determined by the code you include ... the BTextControl constructor, and is then edited by the user. The contents of the editable field can also be set at any time by your program by invoking the BTextControl member function SetText(). ... a control, the system responds by sending a message to the window that holds the control. This message indicates exactly which control has been clicked. The message is received by the window’s...

Ngày tải lên: 26/01/2014, 07:20

... and human-like MT system thanks to the easy addition of translation pattern. 6 Conclusion In this paper, we have described a pattern-based MT system called PalmTree. This system can break ... "A Similarity-Driven Transfer System, " Proc. of the 14th COLING, Vol. 2, pp. 770-776, 1992. 1373 A Pattern-based Machine Translation System Extended by Example-based Processing Hideo ... translation patterns. This is done by us- ing chart-type CFG-parser. The target structure is constructed by the synchronous derivation which generates a target structure by combining target sides...

Ngày tải lên: 17/03/2014, 07:20

... network operating system. Just as a computer cannot operate without an operating system, a network of computers cannot operate without a network operating system. Every network operating system ... network operating system s manufacturer, a desktop computer’s networking software can be added either to the computer’s own operating system or be integrated with it. Network operating system ... „# Memory management The operating system allocates memory to each application, without affecting the memory used by other applications. „# Data management The operating system manages files stored...

Ngày tải lên: 09/12/2013, 17:15

... have clearly shown that the OBW system could improve the visibility as well as forklift performances. 2. OBSERVE BY WIRE FOR FORKLIFTS 2.1 System overview Operating a forklift is a specialized ... environment in term of force feedback information, and we named it as observe -by- wire system. (a) (b) Fig. 2 The OBW system configuration, a forklift lifts loads to the third floor for stacking ... Fig. 3 The haptic interface is developed for the OBW system Fig. 4 The haptic interface is developed for the OBW system A fork system and working environment and control algorithm...

Ngày tải lên: 17/12/2013, 11:15

... !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!! [OK - 1674921 bytes] 1674921 bytes copied in 51.732 secs (32841 bytes/sec) ALSwitch# d. The switch may prompt for an overwrite flash. ... Accept upgrade transfer from other hosts Enabled Actions [U] System XMODEM upgrade [D] Download test subsystem (XMODEM) [T] System TFTP upgrade [X] Exit to Main Menu Enter Selection: ... and Intermediate Routing v 3.0 - Lab 6.2.7a Copyright  2003, Cisco Systems, Inc. Lab 6.2.7a Managing Switch Operating System Files Objective • Create and verify a basic switch configuration....

Ngày tải lên: 24/01/2014, 19:20

... three color components), and because it is a color system with which many program- mers and end users are familiar with (it’s common to several operating systems). The BeOS defines rgb_color as a struct ... MouseDown() routine for the MyDrawView class is as easy as comparing the cursor location (supplied by the system when it automatically invokes MouseDown()) to the area of the region. The BRegion member ... view. Upon declaration, the boundaries of a BRect object can be set by specifying val- ues for each of the four data members or by listing two points—one of which specifies the rectangle’s top left...

Ngày tải lên: 26/01/2014, 07:20

... time that global font pointer is used by your application. Using a global system font You’ve already seen how to specify one of the global fonts as the font to be used by a particular view: just call ... setting a view’s font to one of the global system fonts, but you can use SetFont() with any BFont object. Here, one view is having its font set to the global system font be_ plain_font, while another ... dis- plays a resizable window bordered by a vertical scrollbar and possibly a horizon- tal scrollbar. Figure 8-17 shows such a window—the window displayed by the ScrollViewWindow project. Figure...

Ngày tải lên: 26/01/2014, 07:20

... interface standards are EIDE (Enhanced Integrated Drive Electronics) and SCSI (Small Computer System Interface). • EIDE has evolved over the years and has several variants, all of which have ... the time required for data to travel from one device to another. • If a device transfers 45,000 bytes per second, its data- transfer rate is 45 KBps. • Hard disks offer the fastest data-transfer...

Ngày tải lên: 16/02/2014, 08:20

... strains, and the JCB387 strain without (indi- cated by –) or with (indicated by +) the pEC86 plasmid carrying the ccm genes, were analyzed by heme staining after SDS ⁄ PAGE. In each lane of the ... heterologous expression of class II cytochromes c¢ by E. coli [7–9], predicting that cyto- chrome c¢ biogenesis is System I dependent. However, systematic studies on the effects of the ccm and ... cytochromes c is catalyzed by the cellular machinery, resulting in cytochrome c biogene- sis [5]. For example, in some Gram-negative bacteria, such as E. coli, the System I cytochrome c biogenesis machinery,...

Ngày tải lên: 06/03/2014, 00:20

... file system hierarchy Any operating system needs to save numerous files: from system configuration files, to log files or user files etc. In general, each operating system uses its own file system ... AT&T’s UNIX to help teach his pupils to design operating systems. His idea was to write an operating system that could be studied and modified by anyone who wished to do so. In 1987, he got down ... following the command, preceded by a space, and of- ten by a hyphen. For example, if the command is list, we could add a parameter such as list all. Currently, most operating systems in use are multi-user...

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