background: cardiovascular mortality and morbidity are high in chronic renal failure (crf) patients. increased dispersion of qt intervals is known to predispose to ventricular arrhythmias and sudden cardiac death. this study was conducted to assess the effect of hemodialysis (hd) on corrected qt (qtc) intervals and their dispersions (qtd) in chronic hemodialyzed patients. methods: fifty-eight p...

nowadays energy is one of the most essential needs of human being and it can be considered as the basic prerequisite of social and economic development.  hence, many of the correlations and legislations of a country are affected by it. since iran has huge source of gas and oil, it has turned to a fossil fuel oriented county. but as oil and gas sources are non-renewable ones and cannot be replac...

‎we consider a linear programming problem in a general form and suppose that all coefficients may vary in some prescribed intervals‎. ‎contrary to classical models‎, ‎where parameters can attain any value from the interval domains independently‎, ‎we study problems with linear dependencies between the parameters‎. ‎we present a class of problems that are easily solved by reduction to the classi...

In this paper we are interested in the order structure induced by the relations ’before’ and ’meets’ of Allen’s interval algebra. We provide an abstract definition of this kind of order structure called an interval order. We prove that every interval order is isomorphic to the corresponding order on a set of finite intervals over a linear order without endpoints. As a consequence of this charac...

Temporal Data Mining is the study of pattern searches in time-dependent data. Time-dependent data is generated in a natural way in many different application scenarios. This thesis is motivated by three applications from the automotive industry which produce time-dependent data in the form of interval sequences. Each interval of an interval sequence describes the occurrence of a certain event o...