NoSQL-Datenbanken sind gerade in der Webentwicklung zunehmend beliebt. Oft sind es die großen Datenmengen, die es zu verwalten gilt, mitunter sind diese Systeme aber auch wegen ihrer Schema-Flexibilität für agile Entwicklungsteams interessant. Indem viele NoSQL-Datenbanken keine Unterstützung für die Definition, Einhaltung und Wartung eines globalen Schemas bieten, verlagern sich klassische Auf...

Abstract The demand for hot stamping parts in the automobile industry is increasing due to growth of eco-friendly vehicles with improved crash safety performance and lighter weight. However, use ultra-high-strength steel cold challenging its high yield strength low elongation. Hot a widely used process overcome this challenge, but long die quenching time reduces productivity. In order address i...

Nach einer Einleitung und Diskussion tiber die Eingen­schaften der diabetischen Krankheiten wurde ausflihrlich trber die Aetiologie und Pathophysiologie der Zuckeran­kheiten,insbesondere der Altersdiabetis,gesprochen.Nach der symptomalogie der Diabetis haben wir die ncueste Einteilung der Zuckerkrankheiten genannt und die Untc­rsuchungsmethoden,die heute Uhlich sind,erwahnt;dazu wurden unsere M...

We consider quantum birth of a hot Universe in the framework of quantum geometrodynamics in the minisuperspace model. The energy spectrum of the Universe in the pre-de-Sitter domain naturally explains the cosmic microwave background (CMB) anisotropy. The false vacuum where the Universe tunnels from the pre-de-Sitter domain is assumed to be of a Grand Unification Theory (GUT) scale. The probabil...

In the present study, the finite element analysis of the hot deep drawing process of commercially pure (CP) titanium has been performed without the blank holder in order to investigate the influence of temperature (T), die radius (Rd) and blank diameter (D) on the maximum punch force (Fp) and minimum thickness of the blank (t). Tensile tests were first conducted to extract...

Structures of the influenza A virus M2 proton channel in the open conformation have been determined by X-ray crystallography, and in the closed conformation by NMR. Whereas the X-ray structure shows a single inhibitor molecule in the middle of the channel, four inhibitor molecules bind the channel's outer surface in the NMR structure. In both structures, the strongest hot spots (i.e., regions t...

In multi-hop wireless sensor networks that are characterized by many-to-one (convergecast) traffic patterns, problems related to energy imbalance among sensors often appear. When the transmission range is fixed for nodes throughout the network, the amount of traffic that sensors are required to forward increases dramatically as the distance to the data sink becomes smaller. Thus, sensors closes...

The objective of this program is to develop the knowledge and technology necessary to take full advantage of the unidirectional attenuative properties of ferrites in achieving improved gain and bandwidth in crossed-field microwave amplifiers and oscillators. During this fourth quarterly period, activities included further cold testing of ferrite materials in the L-band cold test vehicle and in ...

Zusammenfassung Es wird eine konstruktive Reglerentwurfsmethode für schaltende nichtlineare steuerungssaffine Systeme vorgestellt, die dem geschlossenen Regelkreis eine schaltende Port-Hamiltonsche Struktur mit gemeinsamer Energiefunktion zuweist und so (asymptotische) Stabilität der Ruhelage erzielt. Die Methode generiert alle schaltenden Zustandsrückführungen, welche die Strecke unter beliebi...

There are a wide range of physical defects which occur during metal forming processes. These defects, which may occur on the surface or be internal, are undesirable not only because of the surface appearance, but because they may adversely affect the strength, formability and other manufacturing characteristics of the material. Some physical defects in metal forming processes such as rolling an...