High electric field effect in very small pseudomorphic High Electron Mobility Transistor (HEMT) A10.22Gao.78AslIn0.2Gag.gAs/GaAs and their influence at low temperature are investigated for O.1pm up to 0 . 4 ~ gate lengths. The extent of transport improvement at low temperature and performance degradation associated with gate length reduction are underlined. Limitations in performance improvemen...

Thomas Kemp Alex Waibel Interactive Systems Laboratories, ILKD University of Karlsruhe 76128 Karlsruhe, Germany ABSTRACT The recognition of broadcast news is a challenging problem in speech recognition. To achieve the long-term goal of robust, real-time news transcription, several problems have to be overcome, e.g. the variety of acoustic conditions and the unlimited vocabulary. In this paper w...

Wikipedia.org is the largest online resource for free information and is maintained by a small number of volunteer editors. The site contains 4.3 million english articles; these pages can easily be neglected, becoming out of date. Any news-worthy event may require an update of several pages. To address this issue of stale articles we create a system that reads in a stream diverse web documents ...

The melting and crystallization of Al50Ni50 are studied by means of molecular dynamics computer simulations, using a potential of the embedded atom type to model the interactions between the particles. Systems in a slab geometry are simulated where the B2 phase of AlNi in the middle of an elongated simulation box is separated by two planar interfaces from the liquid phase, thereby considering t...

In spite of the almost ideal variation of the radiative current of 1.3μm GaAsSb/GaAs-based lasers, the threshold current, Jth, is high due to non-radiative recombination accounting for 90% Jth near room temperature. This also gives rise to low To values ~60K close to room temperature, similar to that for InGaAsP/InP. GaAs-based vertical cavity surface emitting lasers (VCSELs) emitting close to ...

The hole-doped manganite La0.7Ca0.3MnO3 and the electron-doped manganite La0.7Ce0.3MnO3 undergo an insulator to metal transition at around 250 K, above which both behave as a polaronic semiconductor. We have successfully fabricated an epitaxial trilayer (La0.7Ca0.3MnO3/SrTiO3/La0.7Ce0.3MnO3), where SrTiO3 is an insulator. At room temperature, i.e. in the semiconducting regime, it exhibits asymm...

The conventional retinal photocoagulation treatment uses continuous wave (CW) lasers which results in pathophysiologic thermal environment to the surrounding normal tissues such as neural retina, choroid, and photoreceptors. Selective photodamage of retinal pigment epithelium (RPE), thus sparing photoreceptors can be achieved by using short pulsed lasers. The problem associated with the usage o...

The Hodgkin Reed–Sternberg (HRS) cells of classical Hodgkin lymphoma (cHL) are surrounded by a number of reactive and inflammatory cells. The ability of HRS cells to evade immune surveillance is linked to a network of cytokines and chemokines that are produced by HRS and the surrounding cells, in addition to the occasional aberrant expression of programmed death ligand-1 (PDL-1) by HRS that inh...

TESAŘOVá, M., KUDLIČKA, P., POSPÍŠILOVá, L., KALHOTKA, L., HRABĚ, f.: Comparison of mineralisation and humification of postharvest residues of cereals in conventional and organic cropping. Acta univ. agric. et silvic. Mendel. Brun., 2006, LIV, No. 1, pp. 121–126 Yearly inputs and transformations of above – and underground plant residues of winter wheat and spring barley were followed in „intens...

| There is some discussion as to whether glycosyl-phosphatidylinositol(GPI)-anchored proteins occur in microdomains in the cell membrane. These putative microdomains have been implicated in processes such as sorting in polarized cells and signal transduction. Complexes enriched in GPI-anchored proteins, cholesterol and glycosphingolipids have been isolated from cell membranes by using non-ionic...