1,3-Diacyl derivatives of imidazolidine and hexahydropyrimidine: II. Antimycotic activity

Series of 1,3-diacylated derivatives of imidazolidine and hexahydropyrimidine have been screened for antimycotic activity. Optimum activity was found for the 1,3-dihexanoyl derivatives in the imidazolidine series, with the higher and lower derivatives being much less active. In the hexahydropyrimidine series the 1,3-dipentanoyl, -dihexanoyl,-diheptanoyl and -dioctanoyl derivatives all exhibited a high degree of inhibition against all four of the test organisms. The latter wereTrichophyton rubrum, T violaceum, Microsporum gypseum andAspergillus flavus. Presented at the AOCS Meeting, Chicago, September 1970. So. Utiliz. Res. Dev. Div., ARS, USDA.     

Positron Emission Profiling Study of the Diffusion of 3-Methylpentane in Silicalite-1

The influence of the loading on the self-diffusion of 3-methylpentane within silicalite-1 has been studied with Positron Emission Profiling technique. A monotonous decrease in the self-diffusivities of alkane was observed with zeolite loading, which could be approximated by a stretched exponential. As a consequence, the apparent activation energy increases with partial pressure.     

Analyzing court system congestion with Q-Gert network modeling and simulation

Judiciary court delay and congestion is one of the more serious problems confronting local, state and federal governments. Although a court system is basically a well-defined system of servers (i.e. administrators, clerks and judges) and queues of cases waiting to be tried, the application of operations research/management science techniques to court systems has been minimal. This paper will present a comprehensive Q-GERT network model and simulation analysis of a county court system. The model development is described in detail, and a general discussion of the simulation results and their use is presented.     

Residual-Stress-Induced Grain Pullout in a 96% Alumina

A comparison of the surface and bulk microstructures of two 96% aluminas indicates that the residual stresses arising from thermal expansion mismatch created by crystallization of the amorphous boundary phase, when combined with stresses created during grinding, can lead to excessive pullout of the alumina grains. However, neither source of residual stress is, by itself, sufficient to cause such pullout. Residual stresses resulting from crystallization of the boundary glass are expected to play a significant role in determining the abrasive wear resistance of these materials.     

Adaptive Filtering of Neuronal Spike Train Data

A method of analyzing neuronal spike train stimulus-response data which enhances temporal features and reduces nonstationarities is described. First, a Parzen estimate of the post-stimulus density function is computed by convolving spike events with Gaussian kernels. Second, successive segments of the spike train are correlated to a template, and the temporal relationship between segments is adjusted for maximum correlation. This method has been applied for the identification of high-frequency rhythms in spike train data from the cat optic nerve.     

A mixed-integer goal programming model for capital budgeting within a police department

A difficult problem for most police departments is allocating limited dollars for capital expenditures in the most efficient manner possible. Because of the varied objectives of police services as perceived by police administrators, government officials and citizens, traditional allocation criteria, such as cost-benefit analysis, are not viable. As such, this paper proposes the use of mixed-integer goal programming as a methodology for selecting police expenditure items given a limited budget and multiple, conflicting objectives. In order to demonstrate this technique, a case example involving 18 potential expenditure items for a moderately-sized police department will be employed. This example model will be solved using a predetermined priority structure, and the results interpreted. Several alternative priority structures that reflect the objectives of different interest groups will then be tested in order to demonstrate the flexibility of this approach.     

Criticism or propaganda?

Responds to the critique by the Council for the Society for the Psychological Study of Social Issues (SPSSI; 1969) of the author's original article (see record 1969-09740-001) on the influence of heredity vs environment on IQ and scholastic achievement. The author suggests that the SPSSI misrepresents the article and the current state of knowledge of the importance of genetic factors in intellectual development. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Abstract bilinear systems: The forward shift approach

A bilinear realization theory for a Volterra series input-output map is given. The approach involves a special transform representation for a Volterra series and certain shift operators on a Fock space. The approach yields in a very simple manner a theory of span reachability, observability and minimality for bilinear systems.