Thick films or thin?

It is sometimes difficult to decide between thick-film and thin-film technologies in the fabrication of hybrid integrated circuits consisting of a ceramic substrate with deposited passive components and attached active devices. In the case of thick films, the deposited pattern of conductors, resistors, capacitors, and inductors is applied to the substrate by screen-printing and firing special conductive, resistive, or dielectric pastes. Thin-film layers, on the other hand, are deposited in vacuum by evaporation or cathode-sputtering of appropriate source materials. This article discusses the advantages and disadvantages of both technologies as well as their application ranges.     

Electrocutaneous Nerve Stimulation?I: Model and Experiment

The behavior of nerve fibers in the skin during electrocutaneous stimulation has been studied in this investigation for the purpose of understanding the influence of various current pulse parameters. One part of the investigation assessed the amount of stimulus charge, for various pulse parameters, required to depolarize the nodal membrane of myelinated nerve, using the Frankenhaeuser-Huxley model for Xenopus Laevis (toad). The second part of the investigation involved the experimental application of biphasic current pulses via a concentric electrode to the skin of a number of human subjects. The subjects were asked to match the intensity of sensation as stimulus parameters were varied. The experimental results were compared to the predictions of the model by the process of normalization for temperature differences and the loss of electrode current in adjacent passive tissues.     

Experimental Method for Complex Thermo-mechanical Material Analysis

An experimental system for complex thermo-mechanical material analysis is presented in this article. The system provides simultaneous measurements of tensile properties as well as heat generation in the process of tensile deformation. The cooling curve of the sample after its reversible deformation was measured. On the basis of an exponential model of a cooling body with respect to the Biot number Bi, it is possible to calculate the specific heat capacity c _p , the thermal diffusivity α, and the thermal conductivity k. The method had been tested on a variety of materials and the results were compared to those in the technical literature or obtained by reference independent experiments and showed very good agreement.     

面向小功率驱动应用的新型SOI驱动器和SmartPACK／Smart PIM模块

本文基于SOI技术,开发了一款新型的600V/0.3A 6-pack IGBT/MOSFET驱动器芯片.此款名为6ED003L06-F的芯片集成了三相电平转换、门极驱动和电路保护等诸多特性，在缩小芯片尺寸的同时也提高了性能，例如抗反相瞬态电压的鲁棒性等。另外，本文还利用该SOI驱动芯片开发了SmartPACK/SmartPIM系列新型IPM模块，该模块在一块基于DCB层的底板上集成了SOI驱动器，600V IGBT3和自举功能，并且无须支承板。这种IPM可对应6A-12A的额定电流，同时具有结构紧凑、成本低廉、操作简单等优点，适用于各类小功率驱动特别是消费类驱动应用。     

Zur Ermittlung der Teilchengröße dichtgeschütteter pulverförmiger Proben durch Röntgenfluoreszenzanalyse

Theoretische Betrachtungen über die Abhängigkeit der Fluoreszensintensität pulverförmiger Proben von der Teilchengröße. Anwendung der Röntgenfluoreszenzanalyse zur Teilchengrößenermittlung bei einem Mangan-Eisen-Pulver aus einer Legierung mit 50% Mn; Angaben über ihren zweckmäßigen Einsatz und ihre Vorteile.     

Multivariate study of the patient-therapist system: A replication and extension.

Replicates and extends the work of R. H. Moos and S. R. Clemes (see record 1967-07395-001) and F. van der Veen (see record 1965-08090-001). Each of 6 patients saw each of 4 therapists twice. The variables total activity, feeling words, action words, reinforcements each was scored separately for patient and therapist for each interview. Patient problem expression and therapist accurate empathy were rated for each interview. Consistent differences between patients accounted for substantially more variance than consistent differences between therapists on all variables. Patient * Therapist * Session interactions generally accounted for large proportions of the total variance. Results indicate that the therapist behaviors studied were not the result of a trait, of a given tendency to be empathic, or of a consistently applied therapeutic technique, but rather were very substantially situationally or patient determined. (23 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Über den Einfluß von Wärme- und Stoffübergang bei heterogenen Reaktionen zwischen Gasen und dichten Festkörpern

Allgemeine Betrachtung über heterogene Reaktionen zwischen Gasen und Feststoffen und Erörterung der maßgebenden Gleichungen für den Abbau von festen Ausgangsstoffen: Darstellung der Bedeutung von Stoffübergang, Porendiffusion, chemischer Kinetik, Wärmeübergang und Wärmeleitung für den Reaktionsablauf. Definition einer neuen Beziehung für die Reaktionsgeschwindigkeit für geringe Gleichgewichtsabweichungen in der Gasphase zur Beschreibung des Einflusses der einzelnen Teilschritte. Als Beispiel Darstellung des Einflusses von Wärme- und Stoffübergang auf den Reaktionsablauf.     

Neonatal visual evoked potentials as predictors of psychoeducational tests at age seven.

Determined the effectiveness of neonatal visual evoked responses for predicting total and subtest IQ scores, sensorimotor, perceptual-motor, and achievement test scores at age 7. The most reliable visual evoked response was used. The 851 Ss represented a cross section of county hospital births. Visual evoked response and test outcomes were obtained between narrow age ranges. In a simple correlation matrix of visual evoked response with 12 independent measures for 4 race and sex groups, only 1 correlation (arithmetic for black girls) reached significance (p     

Evaluating alcoholism treatment programs: An integrated approach.

Examines the interrelationships among 5 major sets of variables (social background, intake symptoms, program type, treatment experiences, and perceptions of the environment) that are related to posttreatment functioning of alcoholic patients (alcohol consumption, rating of drinking problem, physical impairment, and occupational functioning). The sample consisted of 429 patients selected from 5 different treatment programs. All Ss completed the Community-Oriented Program Evironment Scale about 2 wks after admission to measure their perceptions of the program environment. The relative importance of each set of variables as predictors of outcome was estimated by constructing block variables, using path analyses, and partitioning the explained variance. Results show that (a) the combined explanatory power of the program-related variables is considerably more than would be expected from previous research; (b) the importance of patient background relative to intake symptoms varies with the outcome criterion being used; (c) both the treatment experiences and the patient's perceptions of the treatment environment are strong predictors of outcome; and (d) a substantial proportion of the explained variance is shared between patient-related and program-related variables, suggesting important patient-program selection and congruence effects. (22 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)