fields of solar system objects and interplanetary space from spaceborne magnetometers
The Field of Solar Physics: Review and Recommendations for Ground-Based Solar Research ppt
Ngày tải lên: 22/03/2014, 09:20
A computer system consists of hardware, system programs, and application programs figs 1
... Physical devices Fig 1-1 A computer system consists of hardware, system programs, and application programs Card reader Tape drive Input tape Output tape Printer 1401 (a) System tape (b) 7094 (c) (d) ... Operator-process communication Memory and drum management Processor allocation and multiprogramming Fig 1-25 Structure of the THE operating system Virtual 370s System calls here I/O instructions ... Base-2 Limit-2 Limit User program and data Base Base-2 User-1 data Limit-1 Base-1 User program Limit-1 Base-1 Operating System Operating System (a) (b) Fig 1-9 (a) Use of one base-limit pair The program...
Ngày tải lên: 28/04/2014, 16:35
A computer system consists of hardware, system programs, and application programs figs 2
... are as shown Processes n–2 n–1 Scheduler Fig 2-3 The lowest layer of a process-structured operating system handles interrupts and scheduling Above that layer are sequential processes Process ... Fig 2-5 Skeleton of what the lowest level of the operating system does when an interrupt occurs Process Process Process Process User space Thread Kernel space Thread Kernel Kernel (a) (b) Fig 2-6 ... thread Worker thread User space Web page cache Kernel Network connection Fig 2-10 A multithreaded Web server Kernel space while (TRUE) { get next request(&buf); handoff work(&buf); } (a) while...
Ngày tải lên: 28/04/2014, 16:35
A computer system consists of hardware, system programs, and application programs figs 3
... (q) Fig 3-4 An example of how deadlock occurs and how it can be avoided R A B C S D F U W G (a) T E D V U R E V G (b) Fig 3-5 (a) A resource graph (b) A cycle extracted from (a) Resources in ... exclusion Hold and wait No preemption Circular wait Approach Spool everything Request all resources initially Take resources away Order resources numerically Fig 3-14 Summary of approaches to...
Ngày tải lên: 28/04/2014, 16:35
A computer system consists of hardware, system programs, and application programs figs 4
... Time C B C C B B C C B A A A A D D D Operating system Operating system Operating system Operating system Operating system Operating system Operating system (a) (b) (c) (d) (e) (f) (g) Fig 4-5 Memory ... Operating system in ROM User program User program User program Operating system in RAM Operating system in RAM (a) (b) (c) Fig 4-1 Three simple ways of organizing memory with an operating system and ... faults/sec A B Number of page frames assigned Fig 4-29 Page fault rate as a function of the number of page frames assigned Single address space I space 232 Data Program D space 232 ;; ;; ;; ;;...
Ngày tải lên: 28/04/2014, 16:35
A computer system consists of hardware, system programs, and application programs figs 5
... operating system software Device drivers Interrupt handlers Hardware Fig 5-10 Layers of the I/O software system User process User program User space Rest of the operating system Kernel space Printer ... status Interrupt handlers Wake up driver when I/O completed Hardware Perform I/O operation Fig 5-16 Layers of the I/O system and the main functions of each layer Parameter Number of cylinders Tracks ... Move down n lines Move right n spaces Move left n spaces Move cursor to (m,n) Clear screen from cursor (0 to end, from start, all) Clear line from cursor (0 to end, from start, all) Insert n lines...
Ngày tải lên: 28/04/2014, 16:35
A computer system consists of hardware, system programs, and application programs figs 6
... Address of disk block Address of disk block Address of disk block Address of disk block Address of disk block Address of disk block Address of disk block Address of disk block Address of block of ... locked Number of bytes in a record Offset of the key within each record Number of bytes in the key field Date and time the file was created Date and time the file was last accessed Date and time the ... An almost-full block of pointers to free disk blocks in memory and three blocks of pointers on disk (b) Result of freeing a three-block file (c) An alternative strategy for handling the three free...
Ngày tải lên: 28/04/2014, 16:35
A computer system consists of hardware, system programs, and application programs figs 7
... multimedia and high-performance I/O devices Note that Mbps is 106 bits/sec but GB is 230 bytes Frame English subtitles Hello, Bob Hello, Alice Nice day Sure is How are you Great And you Good ... 50 60 B3 A4 B3 70 80 90 C3 A4 100 A5 B4 C3 A5 B4 110 120 130 Time (msec) Fig 7-12 An example of RMS and EDF real-time scheduling 140 A A1 B B1 A2 A3 B2 C C1 A1 B1 EDF A1 B1 B3 B4 C2 RMS 10 20 ... C2 80 B3 90 A4 100 110 C3 120 A5 130 B4 140 Time (msec) Fig 7-13 Another example of real-time scheduling with RMS and EDF Video server Client Video server equest R Block Client Star t Block Time...
Ngày tải lên: 28/04/2014, 16:35
A computer system consists of hardware, system programs, and application programs figs 8
... 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 Operating system ... directories and the circles are files (b) A system in which all clients have the same view of the file system (c) A system in which different clients may have different views of the file system Client ... position of venus and vice in AFS (b) A client’s view of the file system Client Client stub Skeleton Server Client code Server code Client ORB Object adapter Server ORB Operating system Operating system...
Ngày tải lên: 28/04/2014, 16:35
A computer system consists of hardware, system programs, and application programs figs 9
... User space All system calls go through the reference monitor for security checking Reference monitor Trusted computing base Operating system kernel Fig 9-29 A reference monitor Kernel space Objects ... (c) With a virus at the end (d) With a virus spread over free space within the program Operating system Operating system Operating system Virus Virus Virus Sys call traps Disk vector Clock vector ... the interrupt and trap vectors (b) After the operating system has retaken the printer interrupt vector (c) After the virus has noticed the loss of the printer interrupt vector and recaptured...
Ngày tải lên: 28/04/2014, 16:35
A computer system consists of hardware, system programs, and application programs figs 10
... write, and execute Owner and group can read, write, and execute Owner can read and write; group can read Owner can read and write; all others can read Owner can everything, rest can read and execute ... 10-36 Examples of remote mounted file systems Directories are shown as squares and files are shown as circles Client kernel Server kernel System call layer V- node Virtual file system layer Local ... Fig 10-2 A few of the common UNIX utility programs required by POSIX System calls Interrupts and traps Sockets File naming Map- Page ping faults Cooked tty Network protocols File systems Virtual...
Ngày tải lên: 28/04/2014, 16:35
A computer system consists of hardware, system programs, and application programs figs 11
... support objects FileSystem File system driver objects and file system recognizer objects Security Objects belonging to the security system KnownDLLs Key shared libraries that are opened early and ... Microsoft and third party software Hundreds of counters monitoring system performance Link to HKEY LOCAL MACHINE\SOFTWARE\CLASSES Link to the current hardware profile Link to the current user profile ... CURRENT USER Description Properties of the hardware and software Hardware description and mapping of hardware to drivers Security and account information for users System- wide security policies Generic...
Ngày tải lên: 28/04/2014, 16:35
A computer system consists of hardware, system programs, and application programs figs 12
... Event-driven code Layer System call handler File system File system m Virtual memory Driver Driver Driver n Threads, thread scheduling, thread synchronization Interrupt handling, context switching, ... programmer and serves as a sounding board Manages the people, budget, space, equipment, reporting, etc Edits the documentation, which must be written by the chief programmer The administrator and editor ... modules Test system Dummy procedure Dummy procedure Dummy procedure Deploy (a) (b) Fig 12-10 (a) Traditional software design progresses in stages (b) Alternative design produces a working system (that...
Ngày tải lên: 28/04/2014, 16:35
Báo cáo khoa học: "Effects of buffer system pH and tissue storage on starch gel electrophoresis of allozymes in three tropical tree species" pps
... being studied, to assess the effects of extraction buffers, buffer systems, and conditions of material storage and handling on the activity of a number of enzyme systems, ideally in a factorial design ... affects the charge and separation of enzymes allowing the possibility of increasing the number of zones of enzyme activity It is relevant to note that the R values and f numbers of bands may also ... ’s f R of 0.48 and 0.27 were detected tions, only Two zones of activity with R of 0.39 and ’s f 0.12 were observed for Racosperma species and T superba when analysed with the H buffer system...
Ngày tải lên: 08/08/2014, 23:22
short range wireless communication fundamentals of rf system design and application
... the degree of improvement of the probability of detection from the repetition of messages from the results displayed in the last section of the worksheet S-parameters.mcd — S-Parameters Often manufacturers ... manufacturers of active and passive components provide sets of s-parameters, which range over bands of operating frequencies and biasing currents and voltages By plugging the relevant set of s-parameters ... short-range systems and the importance and techniques of proper matching The antennas of shortrange devices also distinguish them from other radio applications They must be small—often a fraction of a...
Ngày tải lên: 26/10/2014, 14:15
Removal of Nutrients, Organic Matter and Heavy Metals from Paddy Field Drainage by Charcoal
... showed that the behavior of TP differs from that of TOC and TN in the equipment The CVs in heavy metals were larger than those of TOC, TN and TP Especially, the CV of Fe changed from 0.73 at IN to ... - Variations of reduction rate for (a) TOC, TN and TP, (b) Cr, Fe, Pb, and Zn, and diurnal variations of contact times during field test Table - Mean and standard deviation (SD) of the concentration ... the - 13 - Journal of Water and Environment Technology, Vol 7, No 1, 2009 standard deviation (SD) in TP was larger than those of TOC and TN (Table 3) and the reduction rate of TP was distributed...
Ngày tải lên: 05/09/2013, 09:38
Tài liệu A REVIEW OF INDOOR AIR POLLUTION AND HEALTH PROBLEMS FROM THE VIEWPOINT OF ENVIRONMENTAL HYGIENE: FOCUSING ON THE STUDIES OF INDOOR AIR ENVIRONMENT IN JAPAN COMPARED TO THOSE OF FOREIGN COUNTRIES pptx
... the Ministry of Health, Labour, and Welfare of Japan announced the guideline value of formaldehyde first and individual volatile organic compounds (VOCs).13, 14) In Japan, occupants of newly built ... conducted to confirm and extend the U.S.A case definition of MCS The results showed a significant overlap of MCS, chronic fatigue syndrome (CFS) and fibromyalgie, and that no standard diagnostic procedure ... relationship between moisture and temperature on skin and upper airway symptoms was investigated and showed that skin dryness and rashes, pharyngeal dryness, and nasal dryness and congestion are alleviated...
Ngày tải lên: 17/02/2014, 22:20
THE EFFECTS OF MEGAMERGERS ON EFFICIENCY AND PRICES: EVIDENCE FROM A BANK PROFIT FUNCTION docx
... occur and keep the data consistent and comparable over time The specification of the profit finction and estimation of profit efficiency closely follow the procedures of Berger, Hancock, and Humphrey ... Appendix standard profit efficiency model in equations (1) and (2) above, and Table A2 gives the estimated parameters of the model The level of profit efficiency the ratio of predicted profits to ... explanation of the increase in measured profit efficiency from megamergers may be the specification of the profit finction The standard profit function takes prices and fixed netputs as given and assumes...
Ngày tải lên: 06/03/2014, 08:21
Báo cáo khoa học: Reconstruction ofde novopathway for synthesis of UDP-glucuronic acid and UDP-xylose from intrinsic UDP-glucose inSaccharomyces cerevisiae pptx
... direct confirmation of the hypothesis on the basis of the size of the UDP pool in vivo, because of the complexity of the UDPsugar regulation system in plant cells Our yeast system, by contrast, ... importance of UDP-Xyl, there is currently no affordable system for production of large amounts of this nucleotide sugar Thus, we worked to develop a similar system for in vivo production of UDP-Xyl ... cells Our system facilitates efficient production of UDP-GlcA and UDP-Xyl via conversion of a large precursor pool of UDP-Glc into the derivative molecules Here, we report the generation of yeast...
Ngày tải lên: 07/03/2014, 12:20