data envelopment analysis (dea) is a non-parametric technique for evaluation of relative efficiency of decision making units described by multiple inputs and outputs. it is based on solving linear programming problems. since 1978 when basic dea model was introduced many its modifications were formulated. among them are two or multi-stage models with serial or parallel structure often called net...

an experimental and theoretical energy and exergy analysis was conducted for a cylindrical cavity receiver employed in a parabolic dish collector. based on simultaneous energy and exergy analysis, the receiver average wall temperature and overall heat transfer coefficient were determined. a simplified nusselt number for heat transfer fluid (htf) through the receiver as a function of reynolds an...

hospitals as the centers that consume the most resource of health system, based on their function have difference performance and efficiency. the purpose of this study was to assess the efficiency of ahvaz hospitals using data envelopment analysis (dea) method. this study is a descriptive-analytic study that assessed the efficiency of teaching and nonteaching hospitals in ahvaz using dea in 200...

the present study is an attempt towards remodeling cost, revenue and profit relationship within the network process. the previous models of data envelopment analysis (dea) have been too general in their scope and focused on the input and the output within a black box system, therefore they have not been able to measure various phases simultaneously within a network system. by using these models...

Size-discovery trade mechanisms allow large quantities of an asset to be exchanged at a price that does not respond to price pressure. Primary examples include “workup” in Treasury markets, “matching sessions” in corporate bond and CDS markets, and blocktrading “dark pools” in equity markets. By freezing the execution price and giving up on market-clearing, size-discovery mechanisms overcome co...

The efficiency literature, both using parametric and non-parametric methods, has been focusing mainly on cost efficiency analysis rather than on profit efficiency. In for-profit organisations, however, the measurement of profit efficiency and its decomposition into technical and allocative efficiency is particularly relevant. In this paper a newly developed method is used to measure profit effi...

purpose: controversy has recently risen about the presence of compensatory ocular countertorsion (coct) after head tilt. this study was performed to define the functional range of this phenomenon. methods: cycloplegic autorefraction was performed on 80 eyes with regular astigmatism 2d. objective autorefraction was performed in normal position, right and left head tilt positions of 5º, 10º, 15º,...

INTRODUCTION: Ocular morbid condi t ions are responsible for part ial or total bl indness. Ocular morbidi t ies by i ts sheer magni tude form an enormous problem, not only in human suf fering, but also in terms of economical loss and social burden . OBJECTIVE: To study some epidemiological determinants of ocular morbidi t ies in rural area. MATERIAL AND METHODS: Present Community Based Cross-Se...

The object ive was to determine the ef fect iveness of a regular prescribed burning programfor reducing tree mortal i ty in southern pine forests burned by wi ldf ire . This s tudy was conducted on publ ic and industry lands in northeast Florida. On the Osceola National Forest, mean mortality was 3.5% in natural stands and 43% in plantations two growing seasons after u June 1998 wildfire. Burn ...

The solution to many problems requires, or is facilitated by, the use of iteration. Moreover, because iterative steps are repeatedly executed, they must have some degree of generality. An automatic programming system should require that the user make as few problemspecific decisions as possible concerning the size, shape, and character of the ultimate solution to the problem. Work first present...