the cross efficiency evaluation is used to performance measurement of decision making units in data envelopment analysis concept. one of the most important shortcoming of this method is existing alternative optimal solution and therefore, the efficiency scores are not unique. we are going to summarize the pervious models proposed by researchers and suggest an alternative secondary goal approach...

We discuss how to aggregate multiple criteria evaluations belonging to qualitative, linearly ordered scales. Qualitative aggregation operations such as min or max can be refined by discrimin and leximin orderings, in agreement with the Pareto ordering of vector evaluations. Further refinements of discrimin orderings, as well as the generalization of discrimin and lexirnin to functions other tha...

this paper is a survey of recent contributions to and developments in the relationship between efficiency and productivity via the production function. the objective is to provide a brief discussion on data and on the methods of measuring efficiency and productivity. first, we introduce the reader to the measurement of partial and total factor productivity in the context of static and firm - sp...

Sampling techniques play a key role in achieving efficient network measurements by reducing the amount of traffic processed while trying to maintain the accuracy of network statistical behavior estimation. Despite the evolution of current techniques regarding the correctness of network parameters estimation, the overhead associated with the volume of data involved in the sampling process is sti...

In this paper we address methods for characterizing small, low-gain antennas that are intended to be operated autonomously by a passive transponder chip. We present a way to perform accurate 3D gain measurements by means of a small, battery-powered, calibrated signal source and a two axis rotation apparatus. From the measurement results the directional pattern and the antenna efficiency are der...

Web proxy caches are deployed almost everywhere, at organisation boundaries as well as at ISPs. Proxy caches improve latency when retrieving Web documents while reducing the overall network traffic on the Internet. Proxy cache administrators spend some effort configuring the caching software and determining their suitable placements in order to obtain the best achievable quality of service, wit...

In this paper we consider the Weibull distribution as a model for technical efficiency. The distribution has a shape and scale parameter like the gamma distribution and can be a reasonable competitor in practice. The techniques are illustrated using artificial data as well as a panel of Spanish dairy farms.

The energy consumption of information and communication technology (ICT) is still increasing. Several solutions regarding the hardware side of Green IT exist, until now the software contribution to Green IT is not considered sufficiently apart from scientific research. In our paper, we discuss a new method of improving the energy efficiency of software during its development, by putting energy ...

Nowadays, in competitive environment, a fundamental factor that helps governmental and non-governmental organizations to achieve their goals is attention to efficiency and its continuous improvement, which is only possible through continuous Efficiency Evaluation. Data Envelopment Analysis (DEA) is a suitable method for Efficiency Evaluation in organizations. But one limitation of this method i...