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Goethes Erlkönig als Lese- und Ausspracheübung für DaF-Lerngruppen der Kompetenzstufe A2
Stefan Krämer 한국독어독문학교육학회 2012 獨語敎育 Vol.53 No.-
Dieser Artikel stellt eine Unterrichtseinheit vor, die auf einer Unterrichtsidee basiert, die über mehrere Semester hinweg erprobt, variiert und erweitert wurde. Im Mittelpunkt steht Goethes Ballade „Erlkönig", welche als Textgrundlage für einen interaktiven, spielerischen Unterricht mit einer Lerngruppe der Kompetenzsstufe A2 gewählt wurde. Die Planung des Unterrichts orientiert sich am Berliner Modell und den Prinzipien der didaktischen Ausbildung von Lehrkräften in Deutschland. Die Ausarbeitung des Unterrichtsentwurfs erfolgt ebenfalls in einer Form, wie sie in der praktischen Phase der Lehrerausbildung üblich ist: Vorgestellt wird nicht allein das Ergebnis, sondern der gesamte Prozess der didaktischen Entscheidungen-von der Bedingungsanalyse bis zur Diskussion verworfener Alternativen.
Unidirectional High-Power DC-DC Converter Utilizing Scott Transformer Connection
Stefan Milovanovic,Dra?en Duji? 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
This paper proposes unidirectional, isolated, DC-DC converter intended to act as an interface between high/medium voltage bipolar DC grid (or two separate DC grids) and another DC grid of an arbitrary voltage level. With the aim of achieving galvanic isolation, along with voltage matching, Scott transformer connection is employed. Furthermore, medium frequency operation of the isolation stage is considered, leading to an increase in converter’s power density. The proposed converter combines two series connected full-bridge modular multilevel converters, within the high/medium voltage stage, and conventional three-phase diode rectifier, within the low voltage stage, by means of the Scott transformer connection. In order to present basic operating principles and evaluate the proposed converter performance, simulation results of 40kV/1.5kV, 10MW system are presented throughout this paper.
Carbon monoxide: present and future indications for a medical gas
Stefan W. Ryter,Augustine M. K. Choi 대한내과학회 2013 The Korean Journal of Internal Medicine Vol.28 No.2
Gaseous molecules continue to hold new promise in molecular medicine as experimental and clinical therapeutics. The low molecular weight gas carbon monoxide (CO), and similar gaseous molecules (e.g., H2S, nitric oxide) have been implicated as potential inhalation therapies in inf lammatory diseases. At high concentration, CO represents a toxic inhalation hazard, and is a common component of air pollution. CO is also produced endogenously as a product of heme degradation catalyzed by heme oxygenase enzymes. CO binds avidly to hemoglobin, causing hypoxemia and decreased oxygen delivery to tissues at high concentrations. At physiological concentrations, CO may have endogenous roles as a signal transduction molecule in the regulation of neural and vascular function and cellular homeostasis. CO has been demonstrated to act as an effective antiinf lammatory agent in preclinical animal models of inf lammation, acute lung injury, sepsis, ischemia/reperfusion injury, and organ transplantation. Additional experimental indications for this gas include pulmonary fibrosis, pulmonary hypertension, metabolic diseases, and preeclampsia. The development of chemical CO releasing compounds constitutes a novel pharmaceutical approach to CO delivery with demonstrated effectiveness in sepsis models. Current and pending clinical evaluation will determine the usefulness of this gas as a therapeutic in human disease.