concepts characteristics and models of b2b ec cont

... consisting of hardware, operating system, middleware, and application layers, each of which is based on the work of thousands of people over several decades They contain an enormous number of abstractions, ... 4.12 The declarative concurrent model Causal orders of sequential and concurrent executions Relationship between causal order and interleaving executions Execution of the thread ... science and technology Programming as defined above has two essential parts: a technology and its scientific foundation The technology consists of tools, practical techniques, and standards, allowing...

Ngày tải lên: 22/02/2014, 06:20

... consisting of hardware, operating system, middleware, and application layers, each of which is based on the work of thousands of people over several decades They contain an enormous number of abstractions, ... 4.12 The declarative concurrent model Causal orders of sequential and concurrent executions Relationship between causal order and interleaving executions Execution of the thread ... science and technology Programming as defined above has two essential parts: a technology and its scientific foundation The technology consists of tools, practical techniques, and standards, allowing...

Ngày tải lên: 14/08/2014, 10:22

... and S Haridi All rights reserved 1.15 Nondeterminism and time 21 time C={NewCell 0} C:=1 C:=2 First execution: final content of C is C={NewCell 0} C:=2 C:=1 Second execution: final content of ... called recursion It is perfectly normal and no cause for alarm Fact is recursive because the factorial of N is simply N times the factorial of N-1 Fact uses the following mathematical definition of ... head and tail in one step: declare L=[5 8] case L of H|T then {Browse H} {Browse T} end This displays and [6 8], just like before The case instruction declares two local variables, H and T, and...

Ngày tải lên: 14/08/2014, 10:22

... model of a logical theory This works well for declarative and relational computation models, but is hard to apply to other models Section 9.3 gives a logical semantics of the declarative and relational ... define the syntax and semantics of the declarative model: – Section 2.2 gives the data structures: the single-assignment store and its contents, partial values and dataflow variables – Section 2.3 defines ... exception handling, concurrency, components (for programming in the large), capabilities (for encapsulation and security), and state (leading to objects and classes) In the context of concurrency,...

Ngày tải lên: 14/08/2014, 10:22

... it interesting? Because it consists of data structures that are easy to calculate with The records of Table 3.1, HTML and XML documents, and the declarative user interfaces of Section 3.8.2 can ... rest of the computing environment The sixth part steps back to reflect on the usefulness of the declarative model and situate it with respect to other models Copyright c 2001-3 by P Van Roy and ... certain kinds of programs and a bad fit for others This chapter and the next examine the programming techniques of the declarative model and explain what kinds of programs can and cannot be easily...

Ngày tải lên: 14/08/2014, 10:22

... The first object receives from S0 and sends on T0, which is received by the second object, and so forth 4.3.5 Digital logic simulation Programming with a directed graph of stream objects is called ... Limitations and extensions of declarative programming How far can declarative programming go? Section 4.7 explores the limitations of declarative programming and how to overcome them This section ... The first two sections give the fundamentals of lazy execution and show how it interacts with eager execution and concurrency Section 4.5.1 defines the demand-driven concurrent model and gives its...

Ngày tải lên: 14/08/2014, 10:22

... program consists of a set of port objects sending and receiving messages Port objects can create new port objects Port objects can send messages containing references to other port objects This means ... kinds of components, namely floors, lifts, controllers, and timers All component instances are port objects Controllers are used to handle lift motion Timers handle the real-time aspect of the ... between the objects When a port object receives the ball, it immediately sends it to another, picked at random Figure 5.2 shows the three objects and what messages each object can send and where Such...

Ngày tải lên: 14/08/2014, 10:22

... declarative, and unbundled 429 The usual open declarative style, as it exists in Prolog and Scheme Secure, declarative, and unbundled The declarative style is made secure by using wrappers Secure, ... cell C with initial content X Atomically bind X with the old content of cell C and set Y to be the new content Bind X to the current content of cell C Set X to be the new content of cell C Another ... declarative, and bundled Bundling gives an object-oriented flavor to the declarative style Secure, stateful, and bundled The usual object-oriented style, as it exists in Smalltalk and Java Secure,...

Ngày tải lên: 14/08/2014, 10:22

... programming language We show how the concepts of Java fit in the object system of the chapter • Active objects (Section 7.8) An active object extends a port object of Chapter by using a class to define ... method of Obj1, so it will increment by 10 instead of by 100 7.3.5 Reflection A system is reflective if it can inspect part of its execution state while it is running Reflection can be purely introspective ... computation models (Section 7.5) From the viewpoint of multiple computation models, we show how and when to use and not use object-oriented programming We relate it to component-based programming, object-based...

Ngày tải lên: 14/08/2014, 10:22

... of these variant models are still deterministic Declarative concurrency The declarative concurrent models of Chapter all add threads to the declarative model This does not change the result of ... evolution of these concepts and includes some interesting intermediate steps that are no longer used Transaction Processing: Concepts and Techniques The final book is Transaction Processing: Concepts and ... easy to understand [109] Structure of the chapter The chapter consists of seven main sections: • Section 8.1 defines the shared-state concurrent model • Section 8.2 brings together and compares...

Ngày tải lên: 14/08/2014, 10:22

... casual suit Soft picks a soft color and Hard picks a hard color Contrast picks a pair of contrasting colors (one soft and one hard) Suit returns a complete set including shirt, pants, and socks ... binds X and Y and then executes s The second statement executes s and then binds X and Y The third statement waits until it can determine whether or not X and Y are equal It then executes s ... Structure of the chapter The chapter consists of four parts: • Section 9.1 explains the basic concepts of the relational computation model, namely choice and encapsulated search Section 9.2 continues...

Ngày tải lên: 14/08/2014, 10:22

... window of Figure 10.7 10.2.5 Dynamic behavior of widgets The dynamic behavior of widgets is defined by means of action procedures and handler objects Look again at the example of Section 10.2.2: declare ... that shows the advantages of programming with concepts instead of programming in models We start from the declarative programming techniques of Chapter and add state and concurrency exactly where ... declarative base together with a selected set of procedural concepts including objects and threads We provide a user interface toolkit that is both expressive and easy to use In the context of...

Ngày tải lên: 14/08/2014, 10:22

... tolerance and improved failure detection 11.9 Security An application is secure if it can continue to fulfill its specification despite intentional (i.e., malicious) failures of its components Security ... processes Check the correctness and termination properties of the application on one process Most of the debugging is done here • Second, place the threads on the right processes and give the objects ... processes Because of network transparency, these objects are synchronous That is, each object call waits until the method completes before continuing Both mobile and stationary objects are synchronous...

Ngày tải lên: 14/08/2014, 10:22

... intervals of integers Assume that x and y measure the sides of a rectangular field of agricultural land in integral meters We only have approximations to x and y Assume that 90 ≤ x ≤ 110 and 48 ≤ ... Programming • Section 12.1 gives the basic ideas of the propagate -and- search approach by means of an example This introduces the idea of encapsulating constraints inside a kind of container called ... search strategies and distribution strategies We will explain in detail the execution of a concrete example of a search engine on a small problem The definitions of concepts and operations will...

Ngày tải lên: 14/08/2014, 10:22

... computation models of the book except for the relational and constraint-based models The semantics of each earlier model, e.g., the declarative, declarative concurrent, and stateful models, can ... unbound in σy This allows correct calculation of the need σ relation The third rule handles the case of IsDet This case is not handled correctly by the second rule because it does a test on a variable ... program T The execution of a declarative concurrent program can always be separated into a sequence of alternating input and output “phases”: adding a set of bindings (input phase) and executing until...

Ngày tải lên: 14/08/2014, 10:22

... saying whether R is of record type {MakeRecord L Fs} Return record with label L and features Fs {Label R} Return the label of R {Arity R} Return the list of features (arity) of R {Record.toList R} ... “right” Names are the basis of programming techniques such as unbundled secure ADTs (see Section 6.4) and encapsulation control (see Section 7.3.3) In the declarative model, secure ADTs can be built ... operation Two records are the same if they have the same set of features and the language references for each feature are the same The arity of a record is a list of the features of the record sorted...

Ngày tải lên: 14/08/2014, 10:22

... between random mixing models and models accounting for contact repetition and clustering are the correlations between the number of contacts per day and contact repetition and clustering, respectively ... of Ebola and the effects of public health measures: the cases of Congo and Uganda J Theor Biol 2004, 229:119-126 Ferrari MJ, Bjornstad ON, Dobson AP: Estimation and inference of R0 of an infectious ... 16.32[33] g 6–7[3] Direct contact, airborne, droplet, contact with infectious secretions MRSAi 1.2[41]j as long as purulent lesions continue to drain[40] Direct contact, contact with infectious material[40]...

Ngày tải lên: 13/08/2014, 16:21

... chromatograph GC8A, equipped with an ECD, and molecular sieves 60/80 mesh-column (length 2m) Detector/injector and column temperatures were 330 ℃ and 200 ℃, respectively The flow of carrier gas (N2) was 30ml ... References Anderson J.P.E and K.H Domsch (1975) Measurement of bacterial and fungal contributions to respiration of - 71 - selected agricultural and forest soils Canadian Journal of Microbiology, ... in the Table Potentials and contributions of bacterial and fungal denitrifications in tea soils, the submerged litter and sediment of an irrigation pond, and the sediment of a tidal river at in...

Ngày tải lên: 05/09/2013, 08:40

... corporation Office of the Comptroller of the Currency Office of Thrift Supervision savings and loans Securities and Exchange Commission Summary of Deposits Department of the Treasury This is a work of ... that directly or indirectly owns, controls, or has power to vote fewer than percent of any class of voting securities of a specific bank or bank holding company does not have the requisite control ... other hand, accounted for about percent of credit card loans, but they accounted for less than percent of construction and land development loans and almost none of any other type of loan Grandfathered...

Ngày tải lên: 15/03/2014, 09:20

... BANK SECRECY ACT, ANTI-MONEY LAUNDERING, AND OFFICE OF FOREIGN ASSETS CONTROL Section 8.1 Section 314(b) requires virtually the same care and safeguarding of sensitive information as Section ... number, Dollar value of the transaction, and Dates the account was affected 8.1-33 Bank Secrecy Act (12-04) BANK SECRECY ACT, ANTI-MONEY LAUNDERING, AND OFFICE OF FOREIGN ASSETS CONTROL • • back ... the OFAC regulations Such a test should include a review of the frequency of receipt of OFAC updates and interviews to determine personnel knowledge of OFAC procedures A test of the adequacy of...

Ngày tải lên: 15/03/2014, 09:20