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Comparative Performance of Grids in Relation to Their Stated Ratio
The British Journal of Radiology, 1959From the earliest days of radiology the reduction of the amount of scattered radiation reaching the film has engaged the attention of both radiologists and apparatus manufacturers. The interposition of a grid between patient and film has been the device most widely used for this purpose, and much effort has been devoted to the improvement of grids both
R W, STANFORD, R D, MOORE, T H, HILLS
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Performance of Likelihood Ratio Processors
IEEE Transactions on Aerospace and Electronic Systems, 1979Summarized by its ROC curve, the performance of a Bayes optimal detector is a function of two joint a priori probability density functions on the uncertain parameters involved. An investigation is made to determine at what point in the generation of an ROC curve for a given pair of priors sufficient information is retained for the calculation of a new ...
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The Information Ratio as a Performance Metric
SSRN Electronic Journal, 2005The information ratio is used to assess the risk-adjusted performance of active portfolio managers. This performance metric focuses on the active portfolio only and neglects a risky benchmark component. In this paper, we consider the question whether the information ratio can be used to evaluate the value-added of active management from the perspective
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Ratio analysis 1: profitability, efficiency and performance
2018This chapter presents an illustration of ratio analysis, the most commonly used technique in evaluating financial statements. It outlines the importance and advantages of using ratios to evaluate the profitability, efficiency, performance, liquidity and long-term financial stability of an organization.
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Pollen Performance and Sex-Ratio Evolution in a Dioecious Plant
Evolution, 1999There has been a proliferation of studies, in a variety of taxa, that have detected sex-linked or cytoplasmic genes that enhance their own transmission via sex-ratio distortion. One of the most important parameters influencing the dynamics of these elements is the magnitude of their transmission advantage.
Douglas R, Taylor +2 more
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Effects of cocaine and fenfluramine on progressive-ratio performance
Pharmacology Biochemistry and Behavior, 1977Pigeons obtained food on a progressive-ratio schedule that required 8 additional responses for each successive reinforcement. The number of responses in the final completed ratio of the session was defined as the breaking point. When cocaine was administered (IM, 5 min presession), the breaking point increased and then decreased as a function of ...
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Performance evaluation of nonpreemptive response-ratio schedulers
1977In the nonpreemptive highest-response-ratio-next discipline, the priority of a job is defined as the ratio of the time it has spent in the system to its service requirement. We evaluate the performance of this discipline by deriving an expression for the average waiting time of a job conditioned on its service requirement for arbitrary service time ...
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