Marx modulators operated by solid-state switches (e.g. MOSFET, IGBT) offer an alternative to traditional high voltage (HV) modulators for rf power sources. They have the merits of compact size, high-energy efficiency, high reliability, pulse width control and cost reduction. However, Marx modulators need a complex voltage compensation circuit if they are employed in long pulse applications such...

JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact [email protected]. Society for the History of Technology and The Johns Hopkin...

This is the second volume of essays published to honor Richard Lewontin. The essays are concerned with the history, philosophy, and politics of biology. Like the earlier volume, they demonstrate the uniquely stimulating effect Lewontin has had on young scientists and philosophers. In addition to his own contribution in showing how genetic and molecular approaches can be combined in the study of...

In this paper we present our solid-state nanosecond pulse source (the impedance-matched Marx generator) which can generate arbitrary waveforms and be used for pulsed discharge generation. The purpose of the development such a generator is twofold: by being able to change waveform at will, aim control generated pulses very precisely useful plasma applications, but also more fundamental studies. ...

Karl Marx and Leo Tolstoy never met each other, yet within their social criticisms, there is a component of anarchism. This paper asks if Marx’s and Tolstoy’s anarchistic ideas be better understood if we think of them as a form of social prophecy. This paper establishes a three component set of criteria. I analyze Marx and Tolstoy on three criteria: prophetic revelation, revolutionary doctrine,...

Given a directed graph G, a set of k terminals and an integer p, the Directed Vertex Multiway Cut problem asks if there is a set S of at most p (nonterminal) vertices whose removal disconnects each terminal from all other terminals. Directed Edge Multiway Cut is the analogous problem where S is a set of at most p edges. These two problems indeed are known to be equivalent. A natural generalizat...

........................................................................................................................... 3 PREFACE .............................................................................................................................. 6 CONTENTS............................................................................................................................ 9...

labour. Later on, a long section of the first chapter derives various ‘forms of value’ as surface expressions of this congealed abstract labour. These expressions have ‘defects’ which lead, in a dialectical development, to more satisfactory forms. Some Marx scholars try to ignore these Hegelianisms, others consider them an important part of Marx’s argument. Lenin belonged to the latter camp; he...