Ausblick In Das Weltall

DOWNLOAD

Download Ausblick In Das Weltall PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Ausblick In Das Weltall book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page

Ausblick In Das Weltall

DOWNLOAD
Author : Friedrich Becker
language : de
Publisher: Springer-Verlag
Release Date : 2013-11-21

Ausblick In Das Weltall written by Friedrich Becker and has been published by Springer-Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-21 with Science categories.

Ein Ausblick Ins Weltall

DOWNLOAD
Author : Georg Kramer
language : de
Publisher:
Release Date : 1921

Ein Ausblick Ins Weltall written by Georg Kramer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1921 with categories.

Vector Fields On Manifolds

DOWNLOAD
Author : Michael Francis Atiyah
language : en
Publisher: Springer
Release Date : 2013-03-09

Vector Fields On Manifolds written by Michael Francis Atiyah and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-09 with Mathematics categories.

This paper is a contribution to the topological study of vector fields on manifolds. In particular we shall be concerned with the problems of exist ence of r linearly independent vector fields. For r = 1 the classical result of H. Hopf asserts that the vanishing of the Euler characteristic is the necessary and sufficient condition, and our results will give partial extens ions of Hopf's theorem to the case r > 1. Arecent article by E. Thomas [10] gives a good survey of work in this general area. Our approach to these problems is based on the index theory of elliptic differential operators and is therefore rather different from the standard topological approach. Briefly speaking, what we do is to observe that certain invariants of a manifold (Euler characteristic, signature, etc. ) are indices of elliptic operators (see [5]) and the existence of a certain number of vector fields implies certain symmetry conditions for these operators and hence corresponding results for their indices. In this way we obtain certain necessary conditions for the existence of vector fields and, more generally , for the existence of fields of tangent planes. For example, one of our results is the following THEOREM (1. 1). Let X be a compact oriented smooth manifold 0/ dimension 4 q, and assume that X possesses a tangent fteld of oriented 2-planes (that is, an oriented 2-dimensional sub-bundle 0/ the tangent vector bundle).

Meyers Handbuch Ber Das Weltall

DOWNLOAD
Author : Sebastian von Hoerner
language : de
Publisher:
Release Date : 1964

Meyers Handbuch Ber Das Weltall written by Sebastian von Hoerner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with Astronomy categories.

Raum Und Raumvorstellungen Im Mittelalter

DOWNLOAD
Author : Jan A. Aertsen
language : de
Publisher: Walter de Gruyter
Release Date : 1998

Raum Und Raumvorstellungen Im Mittelalter written by Jan A. Aertsen and has been published by Walter de Gruyter this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with History categories.

Die MISCELLANEA MEDIAEVALIA präsentieren seit ihrer Gründung durch Paul Wilpert im Jahre 1962 Arbeiten des Thomas-Instituts der Universität zu Köln. Das Kernstück der Publikationsreihe bilden die Akten der im zweijährigen Rhythmus stattfindenden Kölner Mediaevistentagungen, die vor über 50 Jahren von Josef Koch, dem Gründungsdirektor des Instituts, ins Leben gerufen wurden. Der interdisziplinäre Charakter dieser Kongresse prägt auch die Tagungsakten: Die MISCELLANEA MEDIAEVALIA versammeln Beiträge aus allen mediävistischen Disziplinen - die mittelalterliche Geschichte, die Philosophie, die Theologie sowie die Kunst- und Literaturwissenschaften sind Teile einer Gesamtbetrachtung des Mittelalters.

Blick In Das Weltall

DOWNLOAD
Author : Archenhold-Sternwarte Berlin-Treptow
language : en
Publisher:
Release Date : 1978

Blick In Das Weltall written by Archenhold-Sternwarte Berlin-Treptow and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with categories.

Zeitschrift F R Luftschiffahrt Und Physik Der Atmosph Re

DOWNLOAD
Author :
language : de
Publisher:
Release Date : 1886

Zeitschrift F R Luftschiffahrt Und Physik Der Atmosph Re written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1886 with Aeronautics categories.

Grundriss Der Astrophysik

DOWNLOAD
Author : Prof. Dr. Kasimir Graff
language : de
Publisher: Springer-Verlag
Release Date : 2013-11-21

Grundriss Der Astrophysik written by Prof. Dr. Kasimir Graff and has been published by Springer-Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-21 with Science categories.

Dieser Buchtitel ist Teil des Digitalisierungsprojekts Springer Book Archives mit Publikationen, die seit den Anfängen des Verlags von 1842 erschienen sind. Der Verlag stellt mit diesem Archiv Quellen für die historische wie auch die disziplingeschichtliche Forschung zur Verfügung, die jeweils im historischen Kontext betrachtet werden müssen. Dieser Titel erschien in der Zeit vor 1945 und wird daher in seiner zeittypischen politisch-ideologischen Ausrichtung vom Verlag nicht beworben.

Sternbilderkunde

DOWNLOAD
Author : Gerhard Fasching
language : de
Publisher: Springer-Verlag
Release Date : 2013-03-08

Sternbilderkunde written by Gerhard Fasching and has been published by Springer-Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-08 with Science categories.

Sexuallockstoffe Im Pflanzenreich

DOWNLOAD
Author : Lothar Jaenicke
language : de
Publisher: Springer-Verlag
Release Date : 2013-04-17

Sexuallockstoffe Im Pflanzenreich written by Lothar Jaenicke and has been published by Springer-Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-04-17 with Science categories.

Ihre Biosynthese erfolgt aus kleinen Bausteinen, ahnlich derjenigen der Fett sauren. Ihre Wirkungsweise als Signalstoffe wird in der spezifischen Bin dung an Rezeptorproteine in der Gameten-Membran vermutet, die dadurch ihre Raumstruktur andern und somit einen Impuls auslosen. Dieser wird in "Richtung" oder "Geschwindigkeit" umgesetzt, so daB die Gametenzelle topotaktisch oder phobotaktisch das Ziel, die Duftstoffquelle, erreicht. Diese kann durch einen kiinstlichen Duftstofftrager ersetzt werden, durch den man die wahrnehmbare Grenzkonzentration ermitteln kann. Darauf begrundet sich der quantitative Nachweis, der fur die Erforschung des Wirkmechanis mus, als Modell fur die Vorgange beim Geruchs- und Geschmackssinn, notig ist. Summary Sex hormones play an important role in the development and differentia tion of sexual determination and reproduction; although research in this field has been largely confined to animal studies, these phenomena find their analogs in plants as well. Algae, mosses and fungi are lower plants that are we11 suited for studying these chemical agents and their influence on respective "targets". Sexual determinants and attractants have recently been isolated, identified, and their biological properties characterized. A termone (sex determining hor mone) from the mold Mucor determines the gender of sti11 undifferentiated hyphae. This compound (trisporic acid) is a carotenoid closely related to retinene. In the saprophyte Achlya, the action of Antheridiol precipitates of the male sexual apparatus (antherids). This molecule is a the formation substituted steroid much like its animal counterparts