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Frequency multiplication is a process in modern electronics in which harmonics of the input frequency are generated in nonlinear electronic circuits. Devices based on the propagation and interaction of spin waves are a promising alternative to conventional electronics. The characteristic frequency of these excitations is in the gigahertz (GHz) range and devices are not readily interfaced with conventional electronics. Here, we locally probe the magnetic excitations in a soft magnetic material by optical methods and show that megahertz-range excitation frequencies cause switching effects on the micrometer scale, leading to phase-locked spin-wave emission in the GHz range. Indeed, the frequency multiplication process inside the magnetic medium covers six octaves and opens exciting perspectives for spintronic applications, such as all-magnetic mixers or on-chip GHz sources.

Non-linear processes are a key feature in the emerging field of spin-wave based information processing and allow to convert uniform spin-wave excitations into propagating modes at different frequencies. Recently, the existence of non-linear magnons at half-integer multiples of the driving frequency has been predicted for Ni

Der Umgang mit dem Haar beschaftigt den Menschen tagtaglich. Er beschaftigt ihn wahrscheinlich schon so lange wie sein Umgang mit dem Apfel. »Am Anfang«, so eine Tagungsausschreibung der Evangelischen Akademie Tutzing 2017, »war der Apfel – und der Biss kostete das Paradies«.

Im Angesicht der Entwicklungen industrieller Produktion im 20. Jahrhundert erschien das Handwerk als ein Auslaufmodell. Fur die Zukunft wurde ein Ubergang der Industrie- in die Dienstleistungsgesellschaft prognostiziert. Mittlerweile ist der Sektor der Dienstleistungen massiv angewachsen.

In diesem Teil betreten wir die Buhne des Friseursalons, auf der wir als haartragende Kunden, der Friseur und das Haar in den Hauptrollen auftreten. Zur Buhne gehoren auch die beruhmten Bretter, auf denen all dieses stattfindet und die das Geschehen tragen (sollen). In Fortsetzung der demografischen Betrachtungen aus dem letzten Teil III zunachst einige Informationen, die sich vor allem auf die formalen Qualifikationen und die Vorstellungen und Erwartungen an das Konnen in diesem Beruf beziehen (Abschnitt IV.1).

Niemand entflieht der tagtaglichen Erfahrung mit seinem Haar. Kaum jemand kommt ohne ein dramatisches, wenn nicht traumatisches Friseurerlebnis durchs Leben. Mit dem Haar verbinden sich intensive personliche Erlebnisse und Erfahrungen.

Lasst sich ein Innovationshandeln der in diesem Buch herausgearbeiteten Art uberhaupt erlernen, und gegebenenfalls wie? Diese Frage ist keineswegs eine rhetorische. Denn dieses Innovationshandeln zeichnet sich durch spezifische Qualitaten aus, die nicht uber ein herkommliches, kognitiv-wissensvermittelndes (Beherrschungs-)Lernen erworben werden konnen. Vielmehr bedarf es hierfur solcher Lernwege, wie sie das Konzept einer Kompetenzentwicklung bereit halt, das auf den Erwerb von Handlungsfahigkeit in offenen, komplexen und unsicheren Situationen abzielt. In diesem Kapitel werden dieses Lernkonzept und die dafur erforderlichen Rahmenbedingungen dargestellt.

Is it at all possible to learn an innovation approach of the type described in this book and if so, how? This question is in no way a rhetorical one. After all, such an innovation approach is defined by specific qualities, which cannot be acquired by means of conventional, cognitive (dominance) learning that conveys knowledge. Instead, this requires approaches to learning like those provided by the concept of competence development that aims to acquire a capacity to act in open-ended, complex and uncertain situations. This learning concept and required boundary conditions will be explained in this chapter.

Die in Kapitel I aufgezeigten Merkmale erfahrungsgeleiteter Kooperation verlangen besondere Fahigkeiten fur die Kooperation im Rahmen der alltaglichen Arbeit.

Im vorangehenden Kapitel wurde aufgezeigt, dass erfahrungsgeleitetem Arbeiten unter Bedingungen eines auf Dauer gestellten Strukturwandels eine immer grosere Bedeutung zukommt. Es stellt sich nun die Frage nach der Erlernbarkeit eines solchen Arbeitens.

1. Five groups of male Sprague Dawley rats were given for 6 months a diet with high protein and fat contents but a very low dietary fibre content (group B), and this diet mixed with (g/kg) 50 low-methoxyl pectin (groupL), 50 high-methoxyl pectin (group H), 50 guar gum (group G) and 200 wheat bran (group WB, corresponding to 100 wheat fibre) respectively.2. The weight increment was significantly lower in group G than in the other groups. Assuming no energy value of the dietary fibre, the weight increment (/kJ) was the same in groups B, L and H, lower in group G and higher in group WB, indicating that a proportion of the bran fibre might in fact be available as a source of energy.3. Wheat bran increased total plasma cholesterol and high-density-lipoprotein cholesterol after 6, 12 and 26 weeks. Group G had significantly lowered plasma cholesterol after 12 weeks. Pectin on the other hand did not significantly influence total or HDL-cholesterol levels. It is therefore possible that the plasma cholesterol lowering effect of pectin previously demonstrated in the rat is dependent on the presence of significant amounts of dietary cholesterol as our diets did not contain added cholesterol. Plasma triglycerides decreased with age but were similar in all groups.

(1978). Dietary fibre and experimental colon cancer in the rat. Nutrition and Cancer: Vol. 1, No. 2, pp. 70-73.

INTRODUCTION RESEARCH on the hypothalamus of animals has given us a wealth of information regarding alteration of function, obtained by producing pinpoint lesions in this autonomic center. Such lesions are made with stere6taxic instruments. In the study of human disease, however, we very seldom see such selective lesions. Any pathologic condition involving the hypothalamus usually affects at least one third, if not two thirds of this organ. This is not surprising when one considers the following facts: The whole hypothalamus weighs approximately 4 grams (the size of the terminal phalanx of a grown man's thumb). This small area contains about 15 to 20 paired nuclear centers, of which the afferent and efferent nerve fibers likewise have to run through this narrow region. The clinical observer therefore will usually be confronted with a rather complex situation as far as symptomatology is concerned. It was felt that a survey of a fairly large number of cases with various pathologic lesions of the hypothalamu...

Prolonged, severe hypoglycemic reactions during treatment with conventional doses of sulfonylureas may occur occasionally. The shock symptoms may persist for days and they may result in permanent neurologic deficits or even death. The older undernourished diabetic with late onset and short duration of his diabetes with low previous insulin requirements and with a history of shock, is more prone to acquire such reactions. Retention and accumulation of the sulfonylurea by insufficient, ischemic kidneys in the elderly diabetic is suggested as one possible mechanism for such reaction. The importance of vulnerable, ischemic areas in the brain in the arteriosclerotic diabetic which may give rise to cerebral symptomatology or permanent injury under the added stress of hypoglycemia has been discussed.

No appreciable change in adjustment was noted in 12 chronically ill schizophrenics who were subjects of a 6-month double blind study with methoxypromazine. No toxic or untoward side effects were noted with doses ranging from 100 to 600 mg. daily.