conclusions the major finding of this study is that one unit increase in serum creatinine level suggests an increased risk of graft failure of up to four times. patients and methods this study was carried out at the department of nephrology, baqiyatallah hospital, baqiyatallah university, tehran, iran, between april 2005 and december 2008. during that time period, 461 patients who had undergone...

modeling is one of the most interesting areas in various fields of science. unfortunately data quality, which has an important role in the modeling, is not considered. in fact, most often processes encounter disturbances which results in the collection of abnormal data and may lead to a model different from the real behavior of the process. on the other hand, most of real industrial processes a...

A methodology of dynamic operational risk assessment (DORA) is proposed for operational risk analysis in oil/gas and chemical industries. The methodology is introduced comprehensively starting from the conceptual framework design to mathematical modeling and to decision making based on cost–benefit analysis. The probabilistic modeling part of DORA integrates stochastic modeling and process dyna...

evaluation and improvement of drug management process is essential for patient safety. the present study was performed whit the aim of assessing risk of drug management process in women surgery department of qeh using hfmea method in 2013. a mixed method was used to analys failure modes and their effects with hfmea. to classify failure modes; nursing errors in clinical management model, for cla...

Case-based planning (CBP) systems are based on the idea of reusing past successful plans for solving new problems. Previous research has shown the ability of meta-reasoning approaches to improve the performance of CBP systems. In this paper we present a new meta-reasoning approach for autonomously improving the performance of CBP systems that operate in real-time domains. Our approach uses fail...

Reliability-based models are developed and implemented to rationalize current winter layup replacement practices for one-engine and two-engine Great Lakes marine diesel ships. A semi-Markov competing-process approach is used in our models, where the age-dependent system failure behavior is treated as a race among engine components. Howard's one-set competing process model is implemented and ext...

The common presupposition of enterprise systems (ES) is that they lead to significant efficiency gains. However, this is only the case for well-implemented ES that are well-aligned with the organisation. The list of ES implementation failures is significant which is partly attributable to the insufficiently addressed fundamental problem of adapting an ES efficiently. As long as it is not intuit...

Affect states and reactions commonly occur in norrotives. This paper discusses the importance of affect knowledge ond processing in the context of BORIS, a computer progrom which reads and answers questions about narratives involving multiple sources of knowledge. There are several reasons why affects are important in a process model of narrative comprehension: For one thing, affects describe g...