Measuring errors of amplitude and phase for vibratory accelerations when testing objects

Measurement Techniques -     

Fast integration of reactor-kinetic equations in problems with large perturbations of the reactivity

Conclusions The method proposed for integrating the point-kinetics equations of a reactor, has a series of positive qualities ensuring its effective application in problems of the numerical analysis of the emergency dynamics of nuclear-power plants with deep perturbations of the reactivity. Its advantages include:simplicity of the programs executing the computational algorithms (the calculation is based on explicit formulas);the presence of an automatic regulator of the computation step;high speed (the number of operations in calculations at the step is comparable with the analogous characteristic of the Euler method).Translated from Atomnaya Énergiya, Vol. 67, No. 4, pp. 246–251, October, 1989.     

THE 1980'S: CAN THE CITIES MEET THE CHALLENGE

In this article Mr. Coppie calls attention to the current taxpayer's revolt sweeping the country and points to its potentially ominous meaning for cities. He believes the revolt is motivated by a concern for the need for greater accountability for performance in the public sector than actual tax burdens or tax increases. He says most cities are in need of substantial additional intergovernmental assistance and this will be very difficult to come by in the near future. He says cities must give a high priority to comprehensive financial management and that there will be a relationship between higher levels of government responding to the demands for fiscal assistance and the ability of cities to manage their resources effectively and efficiently. Specifically, Mr. Coppie discusses the following components of financial management: Multi-Year Financial Planning; Issue Identification and Analysis; Productivity Measures; Methods of Disclosure; Training Programs; and A Management Information System. Mr. Coppie is frank to point out that financial management by itself will not solve a city's financial needs. It is, however, an important element in improving a city's credibility and may make it easier to get intergovernmental assistance.     

Thermophysical properties data: Government-university-industry cooperation in multidisciplinary research

Historical developments regarding the realization of the importance of reliable thermophysical properties data in engineering applications are presented. The events leading to the establishment of the Symposium on Thermophysical Properties in 1959 and the accomplishments of the symposia series since then are discussed. Contributions of the National Bureau of Standards to the thermophysical properties field are described.Welcoming address presented at the Ninth Symposium on Thermophysical Properties, June 24–27, 1985, Boulder, Colorado, U.S.A.