نتایج جستجو برای: evaluation standards
تعداد نتایج: 921148 فیلتر نتایج به سال:
This paper presents the results of a study in which scientists were asked about their own publicationsand their citation counts. The study shows that overall the citation counts of the publicationscorrespond reasonably well with the authors’ own assessments of scientific contribution. Generally,citations proved to have the highest accuracy in identifying either major or minor contri...
Gauge blocks continue to be essential reference artifacts in manufacturing because of their simple geometry, but also because they can provide very high accuracy for a reasonable cost. The calibration technique of optical interferometry can directly link gauge block central length to the distance light travels in vacuum in 1/299792458 of a second, the definition of the International System of U...
In 2008, the National Institute of Standards and Technology and Energetics Incorporated collaborated with the International Electrotechnical Commission Technical Committee 113 (IEC TC 113) on nano-electrotechnologies to survey members of the international nanotechnologies community about priorities for standards and measurements to accelerate innovations in nano-electrotechnologies. In this pap...
Several multiple-media culture systems have become commercially available for on-farm identification of mastitis-associated pathogens. However, the accuracy of these systems has not been thoroughly and independently validated against microbiological evaluations performed by referral laboratories. Therefore, the purpose of the present study was to evaluate the performance of commercially availab...
RATIONALE, AIMS AND OBJECTIVES Based on input from 400 stakeholders over 6 years, the 2011 Program Evaluation Standards represents an in-depth analysis of values, meaning and measurement and their relationships in programme evaluation. Evaluation quality is achieved by balancing five attributes: utility, feasibility, propriety, accuracy and evaluation accountability. These attributes are used t...
BACKGROUND Measurement of CD4+ T-lymphocytes (CD4) is a crucial parameter in the management of HIV patients, particularly in determining eligibility to initiate antiretroviral treatment (ART). A number of technologies exist for CD4 enumeration, with considerable variation in cost, complexity, and operational requirements. We conducted a systematic review of the performance of technologies for C...
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