IBM Systems Journal articles from March 1992

IBM Systems Journal archives from March 1992

Preface.
March 1, 1992... Mathematical optimization is important in the application of computer power to problems such as minimization, maximization, and resource optimization. IBM has long been represented in this area by products such as the IBM Mathematical...

Introduction to the IBM optimization subroutine library. (Technical)
March 1, 1992... This essay introduces the IBM Optimization Subroutine Library (OSL) and seven OSL-related papers that appear in this issue. Developed as a result of a partnership between several IBM research and development groups, OSL provides a suite of...

Implementing the simplex method for the Optimization Subroutine Library. (Technical)
March 1, 1992... In this paper we describe the simplex algorithm and briefly discuss the interaction of the detailed implementation of the algorithm with the changes in computer hardware over the last 30 years. Then we give one example of the design changes...

Implementing interior point linear programming methods in the Optimization Subroutine Library. (Technical)
March 1, 1992... This paper discusses the implementation of interior point (barrier) methods for linear programming within the framework of the IBM Optimization Subroutine Library. This class of methods uses quite different computational kernels than the...

A decomposition method for quadratic programming. (Technical)
March 1, 1992... We discuss the algorithms used in the Optimization Subroutine Library for the solution of convex quadratic programming problems. The basic simplex algorithm for convex quadratic programming is described. We then show how the simplex method...

A systematic approach to OSL application programming. (Optimization Subroutine Library) (Technical)
March 1, 1992... The Optimization Subroutine Library (OSL) Provides powerful tools for solving mathematical Programming problems, and permits the integration of these tools into larger applications. in order to access the computational power, an application...

Frontier: a graphical interface for portfolio optimization in a piecewise linear-quadratic risk framework. (Technical)
March 1, 1992... "Frontier" is a pilot graphical user interface for portfolio optimization built for the new IBM workstation, the RISC System/6000, out of basic X-windows and OSL utilities. The program asks the user to select a piecewise linear-quadratic risk...

A global-approach to crew-pairing optimization. (Technical)
March 1, 1992... The problem addressed in this paper is crewpairing optimization in airline flight planning: finding tours of duty (pairings) that are legal and cover every flight leg at the least cost. The legal rules and cost of a pairing are determined by...

Recent developments and future directions in mathematical programming. (Technical)
March 1, 1992... Recent advances in mathematical programming methodology have included: development of interior methods competing with the simplex method, improved simplex codes, vastly improved performance for mixed-integer programming using strong linear...

Customized systems for engineering applications. (Technical)
March 1, 1992... An ApL2--based high-productivity software development environment is shown to enable small teams of two or three persons to build complex engineering software systems. The productivity and flexibility of such small teams, equipment with this...

A split model for OS/2 SCSI device drivers. (small computer system interface) (Technical)
March 1, 1992... The concept of splitting one logical device driver into two or more physical units is presented. The specific case of an Operating System/2' (OS/2) SCSI (Small Computer System interface) device driver is used as an example. The primary reason...

Role of the DASD storage control in an Enterprise Systems Connection environment. (Direct Access Storage Devices) (Technical)
March 1, 1992... This paper compares the Enterprise Systems Connection Architecture (ESCON), with its use of fiber optic cables, to the parallel channel architecture introduced with System/360 it also describes many of the reasons for the introduction of...

The IRM Imperative: Strategies for Managing Information Resources.
March 1, 1992... The IRM Imperative: Strategies for Managing Information Resources, James M. Kerr, John Wiley & Sons, Inc., New York, 1991. 282 pp. (ISBN 0-471-52434-4). The notion or belief that information is an asset that needs rigorous management has...

Introduction to Object-Oriented Databases.
March 1, 1992... Introduction to Object-oriented databases, Won Kim, The MIT Press, Cambridge, MA, and London, England (1990).234pp. (ISBN 0-262-11124-1). This is a comprehensive, very readable, and timely introduction to topics about object-oriented...