The Venerable Converter: A New Approach to Power Processing

A regulating dc-to-dc converter is described which utilizes a new circuit configuration to achieve several desirable features including higher efficiency, a single circuit for regulation and conversion, minimized output filter requirements, and simplified control system applications. The dc operating characteristics are derived and the efficiency of the new converter is shown to compare favorably with the conventional boost regulator. An ac model is derived and a comparison is made between analytical and experimental results

Primary and Secondary Renal Failure in a Total Community (Tecumseh, Michigan): Preponderance in the Elderly and Possible Antecedent Factors*

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/111235/1/j.1532-5415.1974.tb02155.x.pd

Dealing with a traumatic past: the victim hearings of the South African truth and reconciliation commission and their reconciliation discourse

In the final years of the twentieth and the beginning of the twenty-first century, there has been a worldwide tendency to approach conflict resolution from a restorative rather than from a retributive perspective. The South African Truth and Reconciliation Commission (TRC), with its principle of 'amnesty for truth' was a turning point. Based on my discursive research of the TRC victim hearings, I would argue that it was on a discursive level in particular that the Truth Commission has exerted/is still exerting a long-lasting impact on South African society. In this article, three of these features will be highlighted and illustrated: firstly, the TRC provided a discursive forum for thousands of ordinary citizens. Secondly, by means of testimonies from apartheid victims and perpetrators, the TRC composed an officially recognised archive of the apartheid past. Thirdly, the reconciliation discourse created at the TRC victim hearings formed a template for talking about a traumatic past, and it opened up the debate on reconciliation. By discussing these three features and their social impact, it will become clear that the way in which the apartheid past was remembered at the victim hearings seemed to have been determined, not so much by political concerns, but mainly by social needs

Isolation and primary cultures of human intrahepatic bile ductular epithelium

A technique for the isolation of human intrahepatic bile ductular epithelium, and the establishment of primary cultures using a serum- and growth-factor-supplemented medium combined with a connective tissue substrata is described. Initial cell isolates and monolayer cultures display phenotypic characteristics of biliary epithelial cells (low molecular weight prekeratin positive; albumin, alphafetoprotein, and Factor VIII-related antigen negative). Ultrastructural features of the cultured cells show cell polarization with surface microvilli, numerous interepithelial junctional complexes and cytoplasmic intermediate prekeratin filaments. © 1988 Tissue Culture Association, Inc

Oral History Interview: Wallace Hayner

Mr. Hayner was born and reared in Logan County at the turn of the century. Vivid recollections of a teenage cross-country hobo trip are the basis of this interview. During this trip Mr. Hayner worked as a dishwasher in St.Louis, a wheat harvester in Nebraska, and a goat herder on a Montana ranch. Other reminiscences include early family history (his ancestors include Hessian soldiers during the Revolution, an Indian chieftan, and Methodist circuit riders), railroad building in coal country, John D. Rockefeller\u27s interests in West Virginia, moonshining, and the Hatfields.https://mds.marshall.edu/oral_history/1134/thumbnail.jp

A Comparison of the Social Skills Rating System and the Preschool and Kindergarten Behavior Scales

The Preschool and Kindergarten Behavior Scales (PKBS) and the Social Skills Rating System (SSRS), Teacher Form, at the Preschool and Elementary Levels, are fairly new instruments that purport to evaluate children\u27s prosocial abilities and deviant problem behavior. Little research exists comparing the two instruments. Both scales have been determined to be globally technically adequate. However, the research has been limited thus far. The purpose of the current research was to further investigate the relationship between the two scales. A sample of children (n=136) in west central Illinois public and private preschools were used to collect the data. Of these, 64 children in the 3:0-4:11 age range were used to compare the PKBS and the SSRS, Teacher Version, Preschool Form. Additionally, 72 children ages 5:0-6:11 were used to compare the PKBS and the SSRS, Teacher Form, Elementary Level. Convergent and divergent validity of the two scales were analyzed through a correlational investigation. Results indicated correlation coefficients between .50 and .83 for scales assessing similar constructs. Convergent and divergent validity were supported on a global scale for both the SSRS and the PKBS. There were some findings of specific interest. The SSRS consistently rated children with higher levels of problem behavior than did the PKBS. Additionally, the correlation coefficients were consistent across both forms of the SSRS. High positive correlations were found among many of the subscales that purport to measure the same construct. There were appropriate inverse relationships as well. This information is beneficial to educational professionals who are striving to use the most accurate and objective instruments in measuring a child\u27s social skills