Data Envelopment Analysis (DEA) is a mathematical programming approach to assess relative efficiencies with a group of decision making units (DMUs) such as production systems. There have been some useful models for their successful applications in many fields. In this paper, we first point out the defect of the first DEA model CCR (Charnes, Cooper and Rhodes, 1978) in measuring the efficiencies...

This paper reviews the system of the evaluation methods for performance of information system (IS) and their deficiencies. Based on these, the feasibility and necessity to measure the performance from the input/output viewpoint are emphasized. Then, this paper introduces four basic models of data envelopment analysis and selects YMK-DEA and C 2 GS 2 -ISS models for the evaluation of performance...

Bu çalışmada klasik Cantor yüksek entropili alaşımın bileşiminde yer alan Mn yerine eklenen Cu elementinin mikroyapıda ve mekanik özellikler üzerindeki etkileri araştırılmıştır. CoCrFeNiMn CoCrFeNiCu alaşımları ark ergitme ile üretilmişlerdir. X-ışını difraktometresinden elde edilen veriler her iki da yüzey merkezli kübik yapıya sahip olduğunu bulunmuştur. alaşımının mikroyapısında herhangi bir...

We study collections of identical, connected modules which may relocate relative to each other; such a collection is called a modular metamorphic system (see [CPE], [MKK], [PEC], [RV], [YMK]). While such a system must always remain connected, it is possible for such a system to reconfigure its shape through successive motions of individual modules, either by rotation and sliding (e.g., [MKK]) o...

We study collections of identical, connected modules which may relocate relative to each other; such a collection is called a modular metamorphic system (see [CPE], [MKK], [PEC], [RV], [YMK]). While such a system must always remain connected, it is possible for such a system to reconfigure its shape through successive motions of individual modules, either by rotation and sliding (e.g., [MKK]) o...

ON THE BASIC CHARACTER OF RESIDUE CLASSES P . HILTON, J . HOOPER AND J . PEDERSEN Let t, b be mutually prime positive integers . We say that the residue class t mod b is basic if theie exists n such that ta -1 mod b; otherwise t is not basic. In this paper we relate the basic character of t mod b to the quadratic character of t modulo the prime factors of b. If all prime factors p of b satisfy ...

THISARTICLE TRACES THE VALUE AND USE of the Library Bill of Rights in school library media settings through an examination of national library media collection development texts, intellectual freedom publicaconcludes that inrealizing that the Library Bill of Rights is for support and guidance. INTRODUCTION Gordon Baldwin, in this issue of Library Trends, examines the Library Bill of Rights from...

THIS ESSAY EXAMINES T H E CUKRENT international economic disruption and its effect upon the scholarly and academic community, an effect that is exacerbated by what appears to be a fundamental shift in donor philosophy Taken together, these factors are forcing academic and cultural institutions to reevaluate traditional areas of support in light of broader societal pressures. The implications fo...