This paper describes StackFences, a run-time technique for detecting overflows in local variables in C programs. This technique is different from all others developed so far because it tries to detect explicit overflow occurrences, instead of detecting if a particular stack value, namely a return address, was corrupted because of a stack overflow. Thus, StackFences is useful not only for detect...

A new approach or model to the dynamic DEA, referred to as the adjusted dynamic DEA, is proposed in this study. Adjusted dynamic DEA optimizes the production activity of DMUs by introducing adjustment variables to modify the interconnecting activities between consecutive terms, solving conflicts that arise between terms and between management and shareholders. The non-oriented SBM model is used...

THIS paper contains a preliminary examination o f the effect o f using the dichotomy (o, i ) instead o f actual measurement in the study o f relation­ ship. First, the simplest case possible is dealt w i t h , i n the hope o f inspiring, or provoking, more thorough treatment by others. O f course, dichotomy or other ordinal treatment has to be used when measure­ ment is inconceivable, e.g. when...

In assessing the relative efficiency of decision-maker units by classical Data Envelopment Analysis (DEA) models, the status of the data is determined from the input or output points of views. In real issues, there are some data whose statuses are debatable. Some decision making units consider them as input to achieve higher efficiency while some other decision making units consider them ...

the risk free rate of return plays a main role in financial economic theory and financial markets. due to prohibition of interest in islamic countries there is no specific financial instrument with risk free rate of return as a criterion for measuring the risk free rate of market. we apply the kalman filter to estimate this variable for financial markets in iran. the technique is based on a sta...

background: due to the increasing health care costs, the issue of productivity in hospitals must be taken into great consideration in order to provide, preserve and promote public health services. thus, increasing the level of productivity must become the main aim of any hospital. objective of this study is to determine the total factor productivity and its components over the period under the ...