Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Als im Jahre 1995 die Schweizer Astronomen Michel Mayor und Didier Queloz die Entdeckung des ersten extrasolaren Planeten um einen sonnenähnlichen Stern bekanntgaben, konnte noch niemand ahnen, daß sich daraus in den folgenden knapp zwei Jahrzehnten eine neue, nicht nur in ihrer Entwicklung atemberaubende neue Disziplin der Astronomie entwickeln würde. Zum gegenwärtigen Zeitpunkt (2013) findet man in den Katalogen der Astronomen mittlerweile fast 1000 bestätigte und über 3500 „Exoplanetenkandidaten“ – insbesondere Dank der unerwartet erfolgreichen Mission des leider im Frühjahr 2013 ausgefallenen Kepler-Weltraumteleskops.  Es zeigt sich immer mehr, daß Planetensysteme im Kosmos etwas ganz normales sind, die ihrer Natur gemäß eine riesige Formenvielfalt aufweisen. „Heiße Jupiter“, Super-Erden und Pulsarplaneten benennen Objekte, die in unserem Sonnensystem völlig unbekannt sind. Diese exotischen Welten, von denen man meist nur ein paar wenige Parameter kennt, regen nicht nur die Phantasie an, sondern sie befeuern auch die Hoffnung, über kurz oder lang in den Weiten der Milchstraße auch einmal einen Pendanten unseres blauen Planeten zu finden… In diesem Buch werden die wichtigsten Methoden und Erkenntnisse der Exoplanetenforschung so vorgestellt, daß der Leser einen profunden Überblick über diesen neuen Zweig der astronomischen Forschung erhält und in die Lage versetzt wird, die entsprechende Fachliteratur  mit Gewinn zu verfolgen.  Themen sind die verschiedenen Nachweis- und Beobachtungsmethoden von Exoplaneten, ihre Statistik und Klassifizierung, ihr physischer Aufbau sowie ihre Entstehung, wie er sich den Astronomen aus Beobachtungen und theoretischen Überlegungen erschließt.  Das Buch wendet sich an interessierte Studenten der Natur- und Ingenieurwissenschaften, an Abiturienten, Dozenten, Lehrer und nicht zuletzt an Amateurastronomen, die das Wissen über diesen faszinierenden Gegenstand der Forschung mit großer Begeisterung vielen Menschen nahebringen…     Mathias Scholz, 1981-1986 Studium der Physik an der Universität Rostock, danach Berechnungsingenieur und ab 1990 freiberuflich auf dem Gebiet der Umweltsimulation sowie im IT-Bereich tätig; Amateurastronom.

Space sciences. --- Observations, Astronomical. --- Astronomy—Observations. --- Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics). --- Astronomy, Observations and Techniques. --- Astronomy

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

The study of multiferroics and in particular the magnetoelectric couplin g is nowadays a new focus among the many hot topics in physics. The prom ising future of multiferroic materials lies in the coexistence of tradit ionally uncorrelated properties and the existence of a sizable coupling between them. Multiferroics provide a possibility to control one primary order by means of another primary order and create devices that are sui table for special conditions or can create multifunctionality. However, it is difficult to find multiferroicity due to the incompatiblity of fer romagnetism and ferroelectricity. The mechanism to establish magnetoelec tric coupling is always exotic and varying. Although there have been imp ortant research findings in multiferroics, such as lone-pair based multi ferroics, spin-driven ferroelectricity and multiferroic composites, etc, the field is far from mature yet, and the limitations lie both in the f abrication process as well as the complex measurement methods for charac terizing the magnetoelectrical properties. In this thesis, we achieved a structure consisting of Co atoms and Co na noparticles embedded in a crystalline ZnO thin film, aiming at finding m ultiferroicity and novel magnetotransport in such a nanocomposite system . We fabricated the system by pulsed laser deposition of ZnO followed by high-fluence Co ion implantation. The structural properties were charac terized by X-ray diffraction, transmission electron microscopy and X-ray absorption fine structure measurements. The majority of Co exists in th e matrix in an oxidized state (i.e. can be treated as a so-called (Zn,Co )O matrix). On the other hand, crystallized nanosize Co particles were f ound to be embedded in the (Zn,Co)O thin films, in which the thin film s till keeps good crystallinity. In such a complex nanocomposite system, t he electrical properties were studied by means of a helium-4 flow cryost at with a superconducting magnet down to 2.5 K. The low-temperature resi stance of the films followed the Efros-Shklovskii type variable-range-ho pping. Magnetoresistance revealed a spin-dependent signature that surviv es up to 250 K. Negative magnetoresistance exceeding 10% was observed at a magnetic field of 1 T. The magnetic properties were characterized by superconducting quantum interference device magnetometry. The composite reveals a characteristic superparamagnetic behavior, which is consistent with the presence of metallic Co nanoparticles. In addition, in some ca ses we observed exchange bias in the ZnO-Co system. This exchange bias e ffect constitutes, to the best of our knowledge, the first time observat ion of this effect in the ZnO-Co system. Temperature dependent dielectric constant measurements revealed relaxor ferroelectricity, which was further confirmed by polarization measuremen ts. The combination of the polarization measurement with a cryomagnetic system allowed us to determine the magnetoelectric coupling properties. A remarkable magnetoelectric coupling showed up when measuring the polar ization curve under an applied magnetic field. The unexpected relaxor fe rroelectricty is believed to be the result of the local lattice distorti on induced by the incorporation of the Co nanoparticles.

538.97 <043> --- 538.91 <043> --- Special geometry and interaction with particles and radiation--Dissertaties --- Structures, including transitions--Dissertaties --- Theses --- Academic collection --- 538.91 <043> Structures, including transitions--Dissertaties --- 538.97 <043> Special geometry and interaction with particles and radiation--Dissertaties

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

COMFORT WOMEN -- 92 --- CHINA -- 92 --- J3385.90 --- J4850 --- Japan: History -- Gendai, modern -- Shōwa period -- World War II (1931-1945) -- comfort women, ianfu --- Japan: International law -- law of peace and war (including war crimes)

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

This third edition of Health at a Glance: Europe presents a set of key indicators related to health status, determinants of health, health care resources and activities, quality of care, access to care, and health expenditure and financing in 35 European countries.Cette édition contient aussi de nouveaux chapitres sur le personnel de santé et sur l’accès aux soins, qui est un important objectif des politiques de santé dans tous les pays de l’OCDE. Le chapitre sur la qualité des soins a été augmenté d’un ensemble d’indicateurs sur la qualité des soins pour les affections chroniques.Chaque indicateur est présenté dans un format qui se veut le plus clair possible : des graphiques illustrent les variations entre pays et dans le temps, un commentaire succinct tire les principales conclusions des données présentées, et un encadré méthodologique rappelle la définition de l’indicateur et les limitations éventuelles de la comparabilité des données. Une annexe statistique fournit des précisions supplémentaires sur le contexte démographique et économique dans lequel opèrent les systèmes de santé et décrit brièvement les caractéristiques clés du financement du système de santé et de la prestation des services dans les pays de l’OCDE.

WA 900 Public health statistics (including narrative reports on health conditions and health surveys) --- Delivery of Health Care --- Health Care Costs --- Health Status Indicators --- Government Publications [PT] --- statistics and numerical data [Subheading] --- Electronic books --- Europe, Eastern

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

This volume is a collection of research articles on the subject of the solar corona, and particularly, coronal magnetism. The book was motivated by the Workshop on Coronal Magnetism: Connecting Models to Data and the Corona to the Earth, which was held 21 - 23 May 2012 in Boulder, Colorado, USA. This workshop was attended by approximately 60 researchers. Articles from this meeting are contained in this topical issue, but the topical issue also contains contributions from researchers not present at the workshop. This volume is aimed at researchers and graduate students active in solar physics. Originally published in Solar Physics, Vol. 288, Issue 2, 2013 and Vol. 289, Issue 8, 2014.

Magnetic fields. --- Sun --- Corona --- Fields, Magnetic --- Field theory (Physics) --- Geomagnetism --- Magnetics --- Astrophysics. --- Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics). --- Atmospheric Sciences. --- Astronomical physics --- Astronomy --- Cosmic physics --- Physics --- Space sciences. --- Atmospheric sciences. --- Atmospheric sciences --- Earth sciences --- Atmosphere --- Science and space --- Space research --- Cosmology --- Science