For epidemiological tracing of the thermotolerant Campylobacter species C. jejuni and C. coli, reliable and highly discriminatory typing techniques are necessary. In this study the genotyping techniques of flagellin typing (flaA typing), pulsed-field gel electrophoresis (PFGE), automated ribotyping, and amplified fragment length polymorphism (AFLP) fingerprinting were compared. The following as...

When can a firm cheat some individuals without damaging its reputation among others? We develop a model of discriminatory opportunism in which firms can treat all employees fairly, take advantage of all employees, or only take advantage of a subpopulation of employees. If employees believe that an act of opportunism against any employee portends opportunism against all employees, concern for re...

Research centers have an important place in promoting science and technology nationwide. On the other hand, given the limitations in allocating the funds and the facilities needed to establish these centers, it is important to decide on the selection of priority centers. In this decision - making process, several factors, such as requirements, priorities and strategies, capabilities, and balanc...

The idea of using measurements such as biomarkers, clinical data, or molecular biology assays for classification and prediction is popular in modern medicine. The scientific evaluation of such measures includes assessing the accuracy with which they predict the outcome of interest. Receiver operating characteristic curves are commonly used for evaluating the accuracy of diagnostic tests. They c...