78 research outputs found
The Meteoritical Bulletin No. 92, 2007 September
No full textIn this edition of The Meteoritical Bulletin, 1394 recognized meteorites are reported, 27 from specific locations within Africa, 133 from Northwest Africa, 1227 from Antarctica (from ANSMET, PNRA, and PRIC expeditions), and 7 from Asia. The Meteoritical Bulletin announces the approval of four new names series by the Nomenclature Committee of the Meteoritical Society, two from Africa and one from Asia, including Al Haggounia, from A1 Haggounia, Morocco, which is projected to be on the order of 3 metric tons of material related to enstatite chondrites and aubrites. Approved are two falls from Africa, Bassikounou (Mauritania) and Gashua (Nigeria). Approved from areas other than Antarctica are one lunar, two Martian, 32 other achondrites, three mesosiderites, two pallasites, one CM, two CK, one CR2, two CV3, one CR2, and four R chondrites. The Nomenclature Committee of the Meteoritical Society announces 48 newly approved relict meteorites from two new name series, Österplana and Gullhögen (both from Sweden)
development of implants and surgical techniques
No full textDie endovaskuläre Behandlung von Aneurysmen und Dissektionen der Aorta erfolgt
mit Stentprothesen. Dies sind Kombinationen von in der konventionellen
Chirurgie verwendeten Gefäßprothesen und selbstexpandierenden Stents, die in
Einführungskatheter von 6,6 bis 9 mm Durchmesser gepackt sind. Sie werden in
der Regel durch die chirurgisch freigelegte Femoralarterie implantiert und
schalten Aneurysmen von innen aus der Zirkulation aus oder dichten die
Einrisse der Dissektionen von innen ab. Im Laufe von 12 Jahren wurde die
endovaskuläre Therapie von Erkrankungen der thorakalen Aorta zu einem
Standardverfahren in der Herz-, Thorax und Gefäßchirurgie entwickelt. Die
Habilitationsschrift fasst die wichtigsten eigenen Veröffentlichungen aus der
begleitenden klinischen Forschung zu einem Gesamtkonzept zusammen: • Klinische
Erfahrungen mit thorakalen Stentprothesen • Entwicklung einer neuen
verbesserten Stentprothese und ihr klinischer Einsatz • Endovaskuläre
Behandlung der Aortendissektion • Stentprothesen bei traumatischer
Aortenruptur • Rückenmarksischämie nach Implantation von Stentprothesen •
Chirurgische Strategie bei Verschluss der A. subclavia Die endovaskuläre
Methode erweist sich als eine sichere Alternative zur offenen Operation
mittels Thorakotomie oder Thorako-Laparotomie insbesondere im Hinblick auf
eine niedrige Inzidenz von perioperativen Rückenmarksischämien mit
nachfolgenden Paraplegien. Für die Aortendissektion stellt die endovaskuläre
Therapie gegenüber der konventionellen Operation eine qualitativ neue
Behandlung dar, da die Stentprothese den Blutstrom in das wahre Lumen
zurückleitet und durch die Dekompression des falschen Lumens im Idealfall eine
vollständige Remodellierung der Aorta erreicht werden kann. Für die akute
traumatische Aortenruptur wurde die Stentprothese zum Standard der Behandlung,
nicht zuletzt durch die zitierten eigenen Arbeiten.Endovascular therapy of aortic aneurysms or dissections is performed with
stent-grafts, which are combinations of synthetic vascular prostheses and
self-expanding stents that are loaded in delivery catheters of 6.6 to 9 mm
diameter. They are usually implanted through surgically exposed femoral
arteries and exclude aneurysms from the circulation from the inside or seal
the entries of dissection from the inside. Within the past 12 years
endovascular therapy of thoracic aortic diseases has developed into a standard
procedure in thoracic and cardiovascular surgery. This thesis integrates the
most important publications of the author on the concomitant clinical research
into different aspects of the endovascular concept: • Clinical experience in
thoracic stent-grafts • Development of a new improved stent-graft and its
clinical application • Endovascular therapy of aortic dissection • Stent-
grafts in traumatic aortic rupture • Spinal cord ischemia following
implantation of stent-grafts • Surgical strategy in stent-graft induced
occlusion of the left subclavian artery. The endovascular method has been
proved to be a safe alternative to open surgery through thoracotomy or
thoraco-laparotomy, especially related to the low incidence of perioperative
spinal cord ischemia and subsequent paraplegia. In aortic dissection the
endovascular approach results in a new quality of therapy since the stent-
graft redirects the blood flow to the true lumen and, by decompression of the
false lumen, achieves complete remodeling of the aorta in ideal cases. In
traumatic aortic rupture the implantation of stent-grafts has become the
standard of care, not least due to the influence of the publications included
in this thesis
Mineralogy, petrology, and oxygen isotopic composition of Northwest Africa 12379, metal-rich chondrite with affinity to ordinary chondrites
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Neither Arbitrary nor Artificial:Chiefs and the Making of the Namibia-Zambia Borderland
No full textIn the late 1990s a separatist movement emerged in Namibia's northeastern Caprivi Region. In the aftermath of an armed uprising in 1999 speculation emerged regarding a possible link between the Caprivi secessionists and Lozi separatists across the border in Zambia's Western Province. The Lozi heritage certainly has continuing relevance for Caprivi's population. Through language, kinship relations and economic exchange it serves as an integrative factor of everyday life in the Namibia/Zambia borderland. But the Caprivi secessionists had no intentions of re‐creating a united Lozi kingdom. The present‐day positions of authority by the “traditional” leaders of the Fwe (the support base of the secessionists) and other groups in Caprivi were, in fact, created by the territorial separation and system of indirect rule imposed by the German colonial authorities. Thus, the colonial border served vested interests in Caprivi from the outset. Rather than reverting to an imagined pre‐colonial past, the secessionists’ territorial claim emerged from a more recent legacy of pre‐independence state formation: The apartheid regime's attempt to create a Caprivi Bantustan. As in the case of the colonial boundary, this legacy caused new political realities and vested interests to emerge on the ground in Caprivi. Today, informal cross‐border business ventures in the Namibia/Zambia borderland are flourishing. The border is once again at the center of vested interests of those who live in its proximity. To call this border “arbitrary” or “artificial” therefore ignores the fact that in nearly 12 decades it has very much become part of the socioeconomic and political landscape of Caprivi
Refugee Mental Health
No full textThis eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contac
A Combined Diffusion and Fractional Condensation Model for the Chemical and Isotopic Zoning in FeNi-Metal
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