chapter 10  data storage and querying storing and fetching relevant messages

... groups of rwx: r stands for read permission, w stands for write permission, and x stands for execute permission The three groups represent the permissions for the owner, the group and others respectively ... (I can read and execute the program, and nobody else can anything with it) The permissions for the draft document would be rw-r - (I can read and write, the group can read, and others can’t ... other hand, the people who work with you have a need to be able to refer to the document You set the permissions so that only the owner can write it, that the owner and group can read it, and, ...

Ngày tải lên: 22/10/2013, 19:15

... and writer classes to input and output to streams and strings using other types " " StreamReader and StreamWriter, which read and write to a stream StringReader and StringWriter, which read and ... Take Other Types of Input and Output and Read and Write Them to Streams or Strings ! BinaryReader and BinaryWriter Read and Write Primitive Types to a Stream ! TextReader and TextWriter Are Abstract ... CanRead, CanWrite, and CanSeek properties The Read and Write methods read and write byte data For streams that support seeking, the Seek and SetLength methods and the Position and Length properties...

Ngày tải lên: 17/01/2014, 08:20

... languages like C and Pascal and PLC programming system functions The programming kit includes a manual and online help and is available in English, French and German Many manufacturers use it and Schneider ... Fig.6) and controlled and viewed via a Magelis keyboard/screen Security is ensured by an emergency stop on the main switch The system is hardwired and the PLC controls the starter and the messages ... PLC, etc In the PLC and HMI applications, standardisation is defined for all operators and experts in automation and the process The project follows the rules without exception and maintenance staff...

Ngày tải lên: 15/02/2014, 08:54

... steps low and S1 and S2 are opened and S3 and S4 are close The armature * current decreases until ia = ia − ε , at which time the comparator output becomes high; S1 and S2 are closed and S3 and S4 ... 10.11-2) When the output of this comparator (L) is high, S1 and S2 are closed and S3 and S4 are open; when L is low, S3 and S4 are closed and S1 and S2 are open The action of this type of current control ... state, which occurs over interval A, S1 and S2 are closed and S3 and S4 are open The second state occurs over interval B, wherein the S3 and S4 are closed and S1 and S2 are open As in the case of the...

Ngày tải lên: 16/02/2014, 18:48

... assume that k = and n = Table 10.1 shows the list of datawords and codewords Later, we will see how to derive a codeword from a dataword Assume the sender encodes the dataword 01 as 011 and sends it ... codeword is corrupted during transmission, and 111 is received This is not a valid codeword and is discarded The codeword is corrupted during transmission, and 000 is received This is a valid codeword ... scheme, k = and n = As we saw, we have 2k = 16 datawords and 2n = 32 codewords We saw that 16 out of 32 codewords are used for message transfer and the rest are either used for other purposes or unused...

Ngày tải lên: 16/02/2014, 20:20

... (Augmentation) If X -> Y, then XZ -> YZ (Notation: XZ stands for X U Z) IR3 (Transitive) If X -> Y and Y -> Z, then X -> Z  IR1, IR2, IR3 form a sound and complete set of inference rules Inference Rules ... that are useful: (Decomposition) If X -> YZ, then X -> Y and X -> Z (Union) If X -> Y and X -> Z, then X -> YZ (Psuedotransitivity) If X -> Y and WY -> Z, then WX -> Z  The last three inference ... Equivalence of Sets of FDs  Two sets of FDs F and G are equivalent if: - every FD in F can be inferred from G, and - every FD in G can be inferred from F  Hence, F and G are equivalent if F + =G + Definition:...

Ngày tải lên: 12/05/2014, 11:55

... UPs AND DOWNs AT SNAPPLE In 1972, brothers-inlaw Leonard Marsh and Hyman Golden and Arnold Greenberg, Marsh’s childhood friend, founded a business called the Unadulterated Food Corporation and ... short- and long-term win-wins for Cisco acquired company • Have complementary technology that fills a need in Share a common vision and chemistry with Cisco • Have a similar understanding and vision ... acquisitions and show how they’ve changed over time Explain why mergers and acquisitions are important vehicles of corporate strategy Identify the various types of acquisitions Understand how the...

Ngày tải lên: 12/07/2014, 14:20

... RelationalExpr)* AndExpr = EqualityExpr ("&" EqualityExpr)* ExclusiveOrExpr = AndExpr ("ˆ" AndExpr)* InclusiveOrExpr = ExclusiveOrExpr ("|" ExclusiveOrExpr)* ConditionalAndExpr = InclusiveOrExpr ... "true" or "false" PpExpr = Whitespace? PpOrExpr Whitespace? PpOrExpr = PpAndExpr (Whitespace? "||" Whitespace? PpAndExpr)* PpAndExpr = PpEqualityExpr (Whitespace? "&&" Whitespace? PpEqualityExpr)* ... that uses conditional attributes with two overloaded static methods, Require and Ensure, that throw PreconditionException and PostconditionException, respectively, if the evaluation of their boolean...

Ngày tải lên: 12/08/2014, 09:22

... formats and data standards Different formats were implemented by different GIS vendors; different standards come about with different standardization committees The good news about both formats and ... 84/167 Chapter Data entry and preparation ERS 120: Principles of Geographic Information Systems and δf/δy Here, f stands for the elevation field as a function of x and y, and δf/δx, for instance, ... describe the geometry and behaviour of moving and stationary objects on and near the surface of the Earth Figure 4.4: (a) The International Terrestrial Reference System (ITRS), and (b) the International...

Ngày tải lên: 21/10/2014, 10:09

... transfer standards Standards are accepted either as industry and de facto standards, or as authoritative national or international standards Industry standards are frequently used standards that were ... required Metadata standards For metadata to be easily read and understood, standards create a common language for users and producers Metadata standards provide appropriate and adequate information ... constituents in x -and ydirection, respectively δx and δy Analogously to the calculation of the variance and standard deviation of a statistical sample, the root mean square errors mx and my of a series...

Ngày tải lên: 21/10/2014, 10:09

... tasks:  Distinguish the use and operation of static and dynamic routes  Configure and verify a static route  Identify how distance vector IP routing protocols such as RIP and IGRP operate on Cisco ... protocols operate  Configure the RIP and IGRP routing protocols on a Cisco router  Use show ip route, show ip protocols, and other show and debug commands to verify proper routing operation ... show and debug commands What is Routing? 10.120.2.0 172.16.1.0  To route, a router needs to know:  Destination addresses  Sources it can learn from  Possible routes  Best route  Maintain and...

Ngày tải lên: 12/08/2015, 09:20

... 4.2 Data Storage A graph consists two types of elements: nodes and edges, therefore, the problem of data storage for the graph model is divided into two subproblems: node storage and edge storage ... existing storage structures and design a new storage structure to support the new data model for social network services Build a distributed data storage system with high availability and scalability ... we focus on the storage design and indexing In this thesis, the data storage problem is divided into two subproblems, nonblob data storage problem and blob data storage problem 1.3 Contribution...

Ngày tải lên: 04/10/2015, 10:24

... 43 Divide -and- conquer sorting Algorithm DivideAndConquer() if (the list has length greater than 1) partition the list into lowlist, highlist lowlist DivideAndConquer() highlist DivideAndConquer() ... between indices low and high to two sublists Pre Post Uses low and high are valid positions in contiguous list, with low= pivot, i can be increased • Otherwise, last_small is increased and two entries at position last_small and i are swapped: 49 Partition Algorithm • When the loop terminates: • At last,...

Ngày tải lên: 15/03/2014, 17:20

... À:5, which is implied by the standard random and fixed e¤ects assumption that the uit are serially uncorrelated An alternative to computing robust standard errors and test statistics is to use ... 3, su A :248, and ^ ^ sc A 1:932, which gives l A :797 This helps explain why the RE and FE estimates are reasonably close Equations (10.76) and (10.77) also show how random e¤ects and pooled OLS ... Assumption RE.1a, is maintained under the null and the alternative Correlation between x is and uit for any s and t causes both FE and RE to be inconsistent, and generally their plims will di¤er A second...

Ngày tải lên: 06/07/2014, 08:20

... UK—Northern Ireland Albania Ireland Bosnia and Herzegovina Latvia Czech Rep UK—Scotland Czech Rep Slovenia Luxembourg Poland France Latvia UK—England and Wales Poland Czech Rep UK—England and Wales ... Fish and Wildlife Advisories, EPA-823-F-01-010, April 2001, www.epa.gov.) UK—Scotland (2000) Romania (2000) Bosnia and Herzegovina (2000) Finland (1997) Poland (2000) Latvia (2000) UK—England and ... Eurowaternet: Western: Denmark, Germany, France and the UK, Northern: Finland and Sweden and AC: Slovenia, Poland, Latvia, Lithuania, Hungary, Estonia and Bulgaria Number of stations in brackets...

Ngày tải lên: 11/08/2014, 21:21

... between the pin and the rotating finger must be shorter than the thread pitch so the pin can clear the finger on the first reverse-turn The rubber ring and grommet lessen the impact and provide a ... FIG 2—SECONDARY INDICATORS FIG 3—CONTROLLERS AND ACTUATORS 348 lines, textile processing equipment, paper machines, rubber and plastic processers, and printing presses In each of these examples, ... between the indicator and the actuating drive However, the force amplification between the indicator and the drive is rel- 349 Sclater Chapter 10 5/3/01 1:07 PM Page 350 Speed and Tension Control...

Ngày tải lên: 22/10/2012, 14:26

... Restore files and directories user rights Module 10: Backing Up and Restoring Data # Preparing to Back Up Data Slide Objective To introduce issues and concepts for backing up and restoring data ... restored and the duration of the restore Module 10: Backing Up and Restoring Data Lab A: Backing Up and Restoring Data Slide Objective To introduce the lab Lead-in In this lab, you will back up and ... purpose of backing up and restoring data and the permissions required for these tasks !" Prepare for backing up data by identifying the folders to back up and the backup type and backup media to...

Ngày tải lên: 10/12/2013, 16:15

Ngày tải lên: 14/12/2013, 12:15

... insurance premiums, leasing and rental payments, land and equipment purchases, and interest on loans Total fixed costs (TFC) remain the same whether the firm’s factories are standing idle or producing ... also use the funds to expand (without the usual degree of scrutiny) the scope and scale of their firms, thereby giving reason for higher salaries and more perks (since size and executive compensation ... Al Dunlap and Bob Andelman, Mean Business: How I Save Bad Companies and Make Good Companies Great (New York: Times Books, 1996), p 81 19 Chapter 10 Production Costs in the Short Run and Long...

Ngày tải lên: 17/12/2013, 15:19

... intermediate and end device connections in a LAN – Identify the pin out configurations for straight-through and crossover cables Identify the different cabling types, standards and ports used ... • Similar to the switch, cost and interface types and speeds must be considered as well Additional factors: – Expandability – Media – Operating System Features Expandability • Fixed configurations ... today's needs? – A mixture of UTP speeds? – Both UTP and fiber ports? • The number of UTP ports and fiber ports will be needed The number of Gbps ports and 10/100 Mbps ports H c vi n m ng Bách khoa...

Ngày tải lên: 22/12/2013, 13:17