In this paper, a model for information retrieval and ltering applications is proposed. The model uses rough set based decision approaches to deal with the relevance between users' queries and documents. In this model, the users' queries are described into two levels: the interesting categories, and the relevant terms about the interesting categories. By using the rough set based decision theory...

Triangulated categories are important structures lying at the confluence of several exciting areas of mathematics (and even physics). Our notes on the subject are divided into three parts which, if named by the major construction occurring within them, would be titled “Verdier quotients”, “Thomason localisaton” and “Brown representability”. There are many places to learn about triangulated cate...

In taekwondo, kick performance is generally measured using impact force and time. This study aimed to analyse performance in the roundhouse kick to the head according to execution distance between and within Olympic weight categories. The participants were 36 male athletes divided into three categories: featherweight (n = 10), welterweight (n = 15) and heavyweight (n = 11). Our results show tha...

conventional transdermal drug delivery systems (tdds) have been designed for drug delivery through the skin. these systems use the permeability property of stratum corneum, the outermost surface layer of the skin. applying polymeric micro and nanofibers in drug delivery has recently attracted great attention and the electrospinning technique is the preferred method for polymeric micro-nanofiber...

Guizhou Plateau is a region in China that typically shows the contradictory human-earth system. A vulnerability assessment indicator system was constructed to explore the coupled human-natural system characteristic of the karst landform based on the grey correlation analysis mathematic model. The quantitative assessment results show that Qiandongnan and Tongren Districts belong to the slight de...

This paper presents a review on implementation issues of Artificial Neural Networks. Implementation models and various properties of the artificial neurons are discussed. We have surveyed various research contributions in the area of Neural Hardware. The review of implementation for neural hardware is divided into three broad categories – Analog, Digital and Hybrid architecture.

introduction one of the important problems that most of the metropolitans encounter with is natural disasters. earthquake is a main natural disaster. annually 27 sever earthquakes are happened by nineteen thousands killed and twenty six homeless. in recent report of united nations planning office in 2003, iran has had the first position in number of earthquakes with severity higher than 5.5 ric...