this paper proposes an alternative approach for efficiency analysis when a set of dmus uses interval scale variables in the productive process. to test the influence of these variables, we present a general approach of deriving dea models to deal with the variables. we investigate a number of performance measures with unrestricted-in-sign interval and/or interval scale variables.

The flavor of a combinatorial optimization problem is to maximize an objective function over a set of valid points. In the case of TSP, the valid set of points S ⊆ {0, 1}( n 2) is the set of valid tours on the graph and the objective function is the minimum weight tour. In the cases that we will be interested in, the objective function will be linear. To make the problem amenable to linear prog...

Parity and time reversal are obvious and plausible candidates for fundamental symmetries of nature. Hypothesising that these symmetries exist implies the existence of a new form of matter, called mirror matter. The mirror matter theory (or exact parity model) makes four main predictions: 1) Dark matter in the form of mirror matter should exist in the Universe (i.e. mirror galaxies, stars, plane...

Telephony might become just another application on the Internet. To examine if this is a likely or even desireable future, is the topic of this article. Everyone used to know what telephony is but with the appearance of software applications like Skype it isn't that easy anymore. Telephony in the traditional sense is interactive voice conversation between two people connected to a global networ...

Particle simulations, such as molecular dynamics, dissipative particle dynamics or Brownian dynamics are nowadays standard methods for studying the structure and dynamics of complex systems in various geometries. Knowing the interaction potentials between particles it is possible to integrate the governing equations of motion and to study the phaseor configurationspace of the given system. Stud...

s Zhang P, Kooij V, Murphy AM, van der Velden J, dos Remedios C, van Eyk JE (2010). Site‐specific quantification of phosphorylated cardiac troponin I by MS‐based multiple reaction monitoring. International symposium on elctro‐ and liquid‐ phase seperation techniques, Baltimore, USA. Kooij V, Piersma SR, Tang KW, Jiménez CR, Zang P, van Eyk JE, Murphy AM, van der Velden J, Stienen GJM (2010)...