figure30 11 a udp packet consists of four fields
A computer system consists of hardware, system programs, and application programs figs 11
... descriptor Header Deny Elvis 111 111 Allow Cathy 110 000 Allow Ida 111 111 Allow Everyone 100000 Header Audit Marilyn 111 111 Fig 11- 43 An example security descriptor for a file ACE ACE Win32 API function ... tables Stacks, data, etc Stacks, data, etc Stacks, data, etc HAL + OS HAL + OS HAL + OS System data System data System data Process A' s private code and data Process B's private code and data ... Timers RAM Spin locks BIOS MOV EAX,ABC ADD EAX,BAX BNE LABEL MOV EAX,ABC MOV EAX,ABC ADD EAX,BAX BNE LABEL MOVE AX,ABC ADD EAX,BAX BNE LABEL Disk Printer Hardware abstraction layer Fig 11- 8 Some of...
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A computer system consists of hardware, system programs, and application programs figs 1
... 1-7 A typical memory hierarchy The numbers are very rough approximations Read/write head (1 per surface) Surface Surface Surface Surface Surface Direction of arm motion Surface Surface Surface ... 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 can access memory between the base and ... of a disk drive Address Registers when program is running 0xFFFFFFFF User program and data Registers when program is running Limit-2 User-2 data Base-2 Limit-2 Limit User program and data Base...
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A computer system consists of hardware, system programs, and application programs figs 2
... over the use of a global variable Thread 1's code Thread 2's code Thread 1's stack Thread 2's stack Thread 1's globals Thread 2's globals Fig 2-17 Threads can have private global variables Spooler ... threads run Runtime system picks a thread Kernel picks a process Kernel picks a thread Possible: A1 , A2 , A3 , A1 , A2 , A3 Not possible: A1 , B1, A2 , B2, A3 , B3 Possible: A1 , A2 , A3 , A1 , A2 , A3 Also ... We are met on a great battlefield of that war We have come to dedicate a portion of that field as a final resting place for those who here gave their lives that this nation might live It is altogether...
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A computer system consists of hardware, system programs, and application programs figs 3
... (e) Has Max Has Max Has Max Has Max A A A A B B B 4 B — — C C C C Free: (a) Free: (b) Free: (c) Fig 3-10 Demonstration that the state in (b) is not safe Free: (d) Has Max Has Max Has Max A A A B ... resource trajectories Has Max Has Max Has Max Has Max Has Max A A A A A B B 4 B – B – B – C C C C 7 C – Free: (a) Free: (b) Free: (c) Free: (d) Fig 3-9 Demonstration that the state in (a) is safe Free: ... (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 existence (E1, E2, E3, …, Em) Resources available (A1 , A2 , A3 , …, Am) Current allocation matrix...
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A computer system consists of hardware, system programs, and application programs figs 4
... growing data segment ;; ;; ;; ; A B C D 16 E 24 (a) 111 11000 P H P P 14 P 26 H 29 111 1111 1 110 0111 1 111 11000 H 18 Hole Starts Length at 18 (b) P 20 X Process (c) Fig 4-7 (a) A part of memory ... growth A- Data A Actually in use A- Program Operating system Operating system (a) (b) Fig 4-6 (a) Allocating space for a growing data segment (b) Allocating space for a growing stack and a growing data ... global page replacement (a) Original configuration (b) Local page replacement (c) Global page replacement Page faults/sec A B Number of page frames assigned Fig 4-29 Page fault rate as a function...
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A computer system consists of hardware, system programs, and application programs figs 5
... Symbols of 14 bits each 42 Symbols make frame Frames of 588 bits, each containing 24 data bytes … Preamble 98 Frames make sector Data Bytes 16 ECC 2048 288 Fig 5-21 Logical data layout on a CD-ROM ... computer over a communication line, one bit at a time Terminal data structure Terminal data structure Central buffer pool Terminal Terminal Buffer area for terminal Buffer area for terminal (a) (b) ... video RAM Video RAM Screen RAM address A BCD 0123 25 lines …×3×2×1×0 …×D×C×B A 0×B0 0A0 0×B0000 160 characters 80 characters (a) (a) Fig 5-39 (a) A video RAM image for a simple monochrome display...
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A computer system consists of hardware, system programs, and application programs figs 6
... 111 0111 0111 0111 1 63 160 223 110 11010100 0111 1 21 664 223 000 0111 0110 1 0111 48 216 160 1 0111 0110 11 0111 1 262 320 126 110 0100 0111 0111 1 310 180 142 0111 0111 0111 0111 516 482 141 110 1111 1 0111 0111 A 1-KB ... space efficiency All files are KB Free disk blocks: 16, 17, 18 42 230 86 10 0110 11 0110 1100 136 162 234 0110 11 0111 11 0111 210 612 897 101 0110 11 0110 110 97 342 422 0110 11 0110 1110 11 41 214 140 111 0111 0111 0111 1 ... list allocation using a file allocation table in main memory File Attributes Address of disk block Address of disk block Address of disk block Address of disk block Address of disk block Address...
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A computer system consists of hardware, system programs, and application programs figs 7
... subtitles Dag, Bob Dag, Alice Mooie dag Jazeker Hoe gaat het Prima En jij Goed Video English audio French audio German audio Fast forward Fast backward Fig 7-3 A movie may consist of several files 1.00 ... After waiting (d) After starting to refill the buffer (e) Buffer full 120 Frame Video A A Frame A Audio track T T Video A A Frame A T T Video A A A T T Text track Fig 7-17 Interleaving video, audio, ... frames) Minutes 30 60 Play point at 75 90 (a) Play point at 12 (b) Play point at 15 (c) Play point at 16 (d) Play point at 22 (e) Fig 7-16 (a) Initial situation (b) After a rewind to 12 (c) After...
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A computer system consists of hardware, system programs, and application programs figs 8
... Steps in making a remote procedure call The stubs are shaded gray Machine Machine Machine Machine Machine Machine Application Application Application Application Application Application Run-time ... port A Entire packet B A B A B C D C D C D CPU Entire packet (a) (b) Fig 8-17 Store-and-forward packet switching Entire packet (c) Node CPU Node Main RAM User OS Main RAM CPU Switch Main RAM Main ... Memory Has private OS Data Data Data Data OS code I/O Bus Fig 8-7 Partitioning multiprocessor memory among four CPUs, but sharing a single copy of the operating system code The boxes marked Data are...
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A computer system consists of hardware, system programs, and application programs figs 9
... Main’s Stack pointer Virtual address space Virtual address space Stack Main’s local variables Main’s local variables Return addr local variables Return addr A s local variables SP B A s local ... First page (in memory) F A B A A A A A A A A A A A A A A (a) (b) A Second page (not in memory) Page boundary Fig 9-12 The TENEX password problem (c) #include #include ... Goal Data confidentiality Data integrity System availability Threat Exposure of data Tampering with data Denial of service Fig 9-1 Security goals and threats Encryption key...
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A computer system consists of hardware, system programs, and application programs figs 10
... Create a new thread in the caller’s address space Terminate the calling thread Wait for a thread to terminate Create a new mutex Destroy a mutex Lock a mutex Unlock a mutex Create a condition variable ... –rwx Allowed file accesses Owner can read, 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 ... 748 Same process ls exec call new sh created Allocate child's process table entry Fill child's entry from parent Allocate child's stack and user area Fill child's user area from parent Allocate...
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A computer system consists of hardware, system programs, and application programs figs 12
... /usr/ast/books/mos2/Chap-12 Directory: /usr/ast/books/mos2 Chap-10 Chap -11 Chap-12 I-node table 114 38 Internal name: 2 Fig 12-3 Directories are used to map external names onto internal names ... Copilot Administrator Editor Secretaries Program clerk Toolsmith Tester Language lawyer Duties Performs the architectural design and writes the code Helps the chief 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 each need a secretary Maintains...
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Báo cáo khoa học: Fission yeast decaprenyl diphosphate synthase consists of Dps1 and the newly characterized Dlp1 protein in a novel heterotetrameric structure doc
... mutants of Saccharomyces cerevisiae to products of autoxidized polyunsaturated fatty acids Proc Natl Acad Sci USA 93, 7534–7539 Suzuki, K., Okada, K., Kamiya, Y., Zhu, X., Tanaka, K., Nakagawa, ... T., Tanaka, K., Nakagawa, T., Matsuda, H & Kawamukai, M (1998) Molecular cloning and mutational analysis of the ddsA gene encoding decaprenyl diphosphate synthase from Gluconobacter suboxydans ... oligonucleotides 5¢-AGGTCGACAGA TTAGCATGTAAATAG-3¢ (creates a SalI site) and 5¢-CGAAGCTTGGGGGTTACAGAGTTTGA-3¢ (creates a HindIII site) The PCR products were cloned into the SalI and HindIII sites of pBluescript...
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Báo cáo "A new 3α-acetoxy-urs-23,28,30-trioic acid from the leaves of Acanthopanax Trifoliatus " doc
... hot-stage melting point apparatus IR spectra was obtained on a JASCO DIP-370 Digital polarimeter Optical rotations were determined on a JASCO DIP-1000 KUY polarimeter FAB-MS and HR FAB-MS were obtained ... internal standard Column chromatography (CC) was performed on silica gel 60 Plant material A trifoliatus was collected in Langson province, Vietnam in January 2001 and identified by Prof Dr Tran Minh ... Chemistry, VAST, and at the herbarium of the College of Pharmacy, Chungnam National University, Korea Extraction and isolation Dried and powdered leaves (3.7 kg) were extracted repeatedly with...
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FINANCIAL STATEMENTS AND SUPPLEMENTAL INFORMATION New York City Industrial Development Agency (A Component Unit of The City of New York) Years Ended June 30, 2010 and 2009 With Report of Independent Auditors _part1 potx
... these financial statements based on our audits We conducted our audits in accordance with auditing standards generally accepted in the United States and the standards applicable to financial audits ... purposes of additional analysis and is not a required part of the basic financial statements Such information has been subjected to the auditing procedures applied in our audit of the basic financial ... financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation We believe that our audits...
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FINANCIAL STATEMENTS AND SUPPLEMENTAL INFORMATION New York City Industrial Development Agency (A Component Unit of The City of New York) Years Ended June 30, 2010 and 2009 With Report of Independent Auditors _part2 pptx
... obligations of the United States of America or in obligations guaranteed by agencies of the United States of America where the payment of principal and interest are guaranteed by the United States ... the Agency and are payable solely from revenues derived from a Lease Agreement with Yankee Stadium, LLC and a Lease Agreement and Installment Sales Agreement with Queens Ballpark Company, LLC and, ... classified as an “enterprise fund,” as defined by the Governmental Accounting Standards Board (GASB), and, as such, the financial statements have been prepared on the accrual basis of accounting...
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FINANCIAL STATEMENTS AND SUPPLEMENTAL INFORMATION New York City Industrial Development Agency (A Component Unit of The City of New York) Years Ended June 30, 2010 and 2009 With Report of Independent Auditors _part3 doc
... Goldman Sachs Capital Markets, LP Goldman Sachs Capital Markets, LP Goldman Sachs Capital Markets, LP Goldman Sachs Capital Markets, LP A1 / A / A+ A1 / A / A+ A1 / A / A+ A1 / A / A+ A1 / A / A+ ... Goldman Sachs Capital Markets, LP Goldman Sachs Capital Markets, LP Goldman Sachs Capital Markets, LP Goldman Sachs Capital Markets, LP Goldman Sachs Capital Markets, LP Goldman Sachs Capital Markets, ... A+ A1 / A / A+ A1 / A / A+ A1 / A / A+ A1 / A / A+ A1 / A / A+ A1 / A / A+ A1 / A / A+ The Consumer Price Index for purposes of the CPI Bonds is the Nonrevised index of Consumer Prices for All...
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Báo cáo y học: " A high serum level of eotaxin (CCL 11) is associated with less radiographic progression in early rheumatoid arthritis patients" doc
... [4] Clinical examination, X-rays of hands, magenetic resonance imaging (MRI) of the dominant wrist and laboratory analyses were assessed at baseline and after 3, and 12 months The patients received ... factors and chemokines and 1-year radiographic progression in early RA patients Materials and methods Patients A total of 84 consecutively enrolled RA patients with disease duration of less than year ... interpretation of statistical analyses and drafting of the manuscript All authors read and approved the final manuscript Competing interests 11 12 13 14 The authors declare that they have no competing...
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Báo cáo y học: "Small RNA sequencing reveals miR-642a-3p as a novel adipocyte-specific microRNA and miR-30 as a key regulator of human adipogenesis" ppt
... Refflat file) and finally to non-coding RNA classes (fRNAdb, database of ncRNA.org): piwi-interacting RNA (piRNA), tRNA, rRNA, small nucleolar RNA (snoRNA) and other non-coding RNA (ncRNA) Reads ... RNA was extracted and analyzed at day of differentiation Mature miRNA expression was evaluated using Mirscript assays (Qiagen SA) as specified by the manufacturer’s protocol Real-time PCR was ... C T C C A A A T G T G T C T T G G G G T G G G G G A T C A A G A C A C A T T T G G A G A G G G A A C C T C C C A A C T C G G C C T C T G C C A T C A T T Figure Abundance of each base along the...
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firewalking - a traceroute-like analysis of ip packet responses to determine gateway accessing
... with an advanced understanding of network infrastructure and TCP/IP packet structures Firewalking uses a traceroute-like IP packet analysis to determine whether or not a particular packet can pass ... behind a packet filter, an attacker can generate an accurate map of a network’ topology s It should be noted that the assumption that it is our target gateway that is dropping the traffic may not ... `slow walk` or a `creeping walk` This is akin to a normal scan, however we scan each hop en route to the target We perform a standard firewalk ramping phase, and then scan each intermediate hop up...
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