Praise for the Third Edition: "This is one of the best books available. Its excellent organizational structure allows quick reference to specific models and its clear presentation . . . solidifies the understanding of the concepts being presented."IIE Transactions on Operations EngineeringThoroughly revised and expanded to reflect the latest developments in the field, Fundamentals of Queueing Theory, Fourth Edition continues to present the basic statistical principles that are necessary to analyze the probabilistic nature of queues. Rather than presenting a narrow focus on the subject, this update illustrates the wide-reaching, fundamental concepts in queueing theory and its applications to diverse areas such as computer science, engineering, business, and operations research.This update takes a numerical approach to understanding and making probable estimations relating to queues, with a comprehensive outline of simple and more advanced queueing models. Newly featured topics of the Fourth Edition include:Retrial queuesApproximations for queueing networksNumerical inversion of transformsDetermining the appropriate number of servers to balance quality and cost of serviceEach chapter provides a self-contained presentation of key concepts and formulae, allowing readers to work with each section independently, while a summary table at the end of the book outlines the types of queues that have been discussed and their results. In addition, two new appendices have been added, discussing transforms and generating functions as well as the fundamentals of differential and difference equations. New examples are now included along with problems that incorporate QtsPlus software, which is freely available via the book's related Web site.With its accessible style and wealth of real-world examples, Fundamentals of Queueing Theory, Fourth Edition is an ideal book for courses on queueing theory at the upper-undergraduate and graduate levels. It is also a valuable resource for researchers and practitioners who analyze congestion in the fields of telecommunications, transportation, aviation, and management science.

Fundamentals of Queueing Theory

An apparatus and method is provided for resolving virtual network names using one or more name routers. A conventional Uniform Resource Locator (URL) naming scheme is extended by allowing any component to be mapped to an address. The resolution process occurs recursively through a plurality of name routers. Resolution can be contextual, such that the same virtual network name may be resolved differently depending on the identity of the client or other parameters.

Resolving virtual network names

A system for conducting performance analysis for executing tasks. The analysis involves generating a variety of trace information related to performance measures, including parallelism-related information, during execution of the task. In order to generate the trace information, target source code of interest is compiled in such a manner that executing the resulting executable code will generate execution trace information composed of a series of events. Each event stores trace information related to a variety of performance measures for the one or more processors and protection domains used. After the execution trace information has been generated, the system can use that trace information and a trace information description file to produce useful performance measure information. The trace information description file contains information that describes the types of execution events as well as the structure of the stored information. The system uses the trace information description file to organize the information in the trace information file, extracts a variety of types of performance measure information from the organized trace information, and formats the extracted information for display. The system can use default or user-defined functions to extract and format trace information for display. After the system displays one or more types of performance measure information, a user of the system can then interact with the system in a variety of ways to obtain other useful performance analysis information.

Parallelism performance analysis based on execution trace information

An internet traffic redirection architecture (FIG.3) is disclosed that allows for directing of various traffic to specified sites (7). The system and method allow a controller, such as an ISP (6), to benefit from unresolved IP Address requests and keyword and hotword queries by capturing this traffic and directing it to participating partners (7) who provide content relevant and/or geographically relevant results (7). The system and method can decrease lost traffic, irrelevant keyword and hotword search results, and irrelevant redirection by web browsers resident on user's personal computers (5).

Systems and methods for direction of communication traffic

A tenant-based resource allocation model for scaling Software-as-a-Service applications over cloud computing infrastructures

In most commercial electronic contract management applications available today, different customized code base has to be developed, deployed and operated to support each tenant. Few advanced commercial electronic contract management applications use a single code base with configuration options to support multi-tenants. However, a separate instance of the code base still has to be deployed and operated for each tenant even in these applications. The business model of having to support a single application instance for each tenant makes an electronic contract management application and other critical business applications out of reach for most small and medium businesses (SMBs), in particular, the very small businesses (SVBs) because of its high development and maintenance cost. Recently, a new business model of a single application instance supporting multi-tenancy based on software as a service (SaaS) has emerged making expensive business applications more affordable for SMBs and SVBs for multi-tenancy [1]. In this paper, we present the first of a kind multi-tenancy SaaS electronic contract management application. We also describe several novel methods used in the metadata, security and shared services, as well as customization and tenant extensions modules to support multi-tenancy SaaS in this application. This multi-tenancy SaaS application has shown to benefit both the application service providers as well as their tenants. This new multi-tenancy SaaS model can reduce the application hosting cost and make the application more affordable to the tenants because of its capabilities in customization and scalability while continuing to support an increasing number of tenants. It furthers benefits tenants by saving their money and time with immediate access to the latest IT innovations and infrastructure improvements on a single application code base. Most end users of tenants have found their productivities increased, the contract transaction time accelerated, contractual errors reduced in using this multi-tenancy SaaS electronic contract management application as demonstrated in several ongoing IBM pilot programs serving more than ten tenants with over 3000 end users.

A Software as a Service with Multi-tenancy Support for an Electronic Contract Management Application

A central processing unit (CPU) in a computer that permits speculative parallel execution of more than one instruction thread. The CPU uses Fork-Suspend instructions that are added to the instruction set of the CPU, and are inserted in a program prior to run-time to delineate potential future threads for parallel execution. The CPU has an instruction cache with one or more instruction cache ports, a bank of one or more program counters, a bank of one or more dispatchers, a thread management unit that handles inter-thread communications and discards future threads that violate dependencies, a set of architectural registers common to all threads, and a scheduler that schedules parallel execution of the instructions on one or more functional units in the CPU.

Executing speculative parallel instructions threads with forking and inter-thread communication

A method for providing multi-tenant services includes receiving a request from a user, establishing tenancy information for the user, wherein the tenancy information is selected which corresponds to a tenant of the user from among multiple tenants, customizing the request according to the tenancy information established for the user, forwarding the request to an application that is not multi-tenant aware, receiving results of the request from the application, customizing the results according to the tenancy information established for the user and corresponding to the tenant of the user, and returning customized results to the user.

System and Methods to Create a Multi-Tenancy Software as a Service Application

A method, system and computer program for providing content from a merchant site to a target user over a computer network. The merchant site provides a landing page to the target user in response to a request for data. The landing page includes a redirect module configured to redirect the target user to a destination page. The landing page also includes a cookie module configured to store a computer readable client cookie in memory identifying the marketing channel referring the target user to the merchant site.

Landing page and channel identifier in multichannel marketing system

A method for automating contract negotiation between a plurality of parties over a communications network. The parties communicate and agree upon a negotiation protocol before commencing the negotiation in a meta contract that is formed to govern or control the negotiation process. The automatic negotiation may include at least one sub negotiation. Machine-executable rules are specified to enable an automatic negotiation to take place between servers over a communications network. A successful negotiation may result in the formation of an electronic commerce contract. Each party may maintain the contract state of the overall negotiation, which may take place among two or more parties, wherein at least one party may be represented by a broker. Thus, complex negotiations may be handled automatically by the inventive method. The negotiation may be conducted semi-automatically to allow for human intervention in the negotiation process.

Linh Lam

Papers

A Software as a Service with Multi-tenancy Support for an Electronic Contract Management Application

Executing speculative parallel instructions threads with forking and inter-thread communication

System and Methods to Create a Multi-Tenancy Software as a Service Application

Landing page and channel identifier in multichannel marketing system

Automated dynamic negotiation of electronic service contracts