One of the most effective Vehicular communication process is handover. Handover is about the selection of effective base station, when a Vehicular node comes outside its current coverage range. In case of hybrid communication environment, the criticality of handover process is increases. In this paper, a effective parametric handover mechanism is defined for WiFi and WiMax based hybrid network....

Fragment assembly using structural motifs excised from other solved proteins has shown to be an efficient method for ab initio protein-structure prediction. However, how to construct accurate fragments, how to derive optimal restraints from fragments, and what the best fragment length is are the basic issues yet to be systematically examined. In this work, we developed a gapless-threading metho...

Due to uncertainties in demand, some parts might go out of stock during the manufacturing process leading to backorders if an outof-stock part is critical. In order to reduce additional cost it is important to optimize restocking processes. To do so, the concept of Part Criticality is used to rank and prioritize parts involved in the production of different products. In this paper, we develop a...

A review of the main results obtained by the authors concerning analysis of networks with imprecise activity duration times, with a stress on the analysis of criticality, is presented.

We study bureaucratic corruption in a model in which a constituency sets required levels for a given set of activities. Each activity is carried out by an external provider, and its realization is supervised by a bureaucrat. Bureaucrats are supposed to act on behalf of the constituency, but they can allow providers to deliver lower activity levels than contracted in exchange for a bribe. Given ...

We propose a new self-organizing hierarchical softmax formulation for neural-network-based language models over large vocabularies. Instead of using a predefined hierarchical structure, our approach is capable of learning word clusters with clear syntactical and semantic meaning during the language model training process. We provide experiments on standard benchmarks for language modeling and s...

The causes and possible relations between the abundance of fractal structures and 1/f signals found in nature have puzzled scientists for years. Based on observations of computer simulations of the cellular automata sandpile model, the term, self-organized criticality (SOC) was invented by theoretical physicists Bak and coworkers (1987) and was used to explain a universal dynamic organizing pro...

We study the concept of the self-organized criticality (SOC) and its application to a wide range of scientific problems with very different backgrounds. In particular, we discuss the Bak-TangWiesenfeld sandpile model which displays SOC behavior and by computing the critical exponent for the two-dimensional model we find the agreement with the known result. Finally, we provide a new example of Z...

(59% vs. 38%), which does not reach statistical significance for the small number of patients analyzed. In addition, this higher rate of slow flow could have provoked larger MI, as indirectly reflected by the higher rate of cardiogenic shock and higher level of troponin T in the group of patients who died. It is of note that left ventricular ejection fraction (LVEF) is not mentioned, although i...

In this paper a hierarchical extension of the Minority Game is de2ned and studied. Numerical 9 simulations show a special type of emergent global behavior between separated parts of the hierarchical structure, connected only through a normalized mean 2eld quantity. 11 c © 2003 Published by Elsevier Science B.V.