Sökresultat

Filtyp

Din sökning på "*" gav 533467 sökträffar

On the Monte Carlo Description of Hot Carrier Effects and Device Characteristics of III-N LEDs

Recent experiments have suggested that high energy charge carriers can have a significant effect on the operation of group III nitride (III-N) light-emitting diodes (LEDs), possibly playing an important role in the efficiency droop. As hot carriers are not accounted for by device simulation tools based on drift-diffusion (DD) and quasiequilibrium conditions, more advanced tools are needed. Here, f

Single-Cell Analysis Reveals a Close Relationship between Differentiating Dopamine and Subthalamic Nucleus Neuronal Lineages

Stem cell engineering and grafting of mesencephalic dopamine (mesDA) neurons is a promising strategy for brain repair in Parkinson's disease (PD). Refinement of differentiation protocols to optimize this approach will require deeper understanding of mesDA neuron development. Here, we studied this process using transcriptome-wide single-cell RNA sequencing of mouse neural progenitors expressing the

Optimizing DRX for Video delivery over LTE: Utilizing Channel Prediction and In-network caching

We jointly optimize Discontinuous Reception (DRX) cycle length and LTE scheduling to minimize mobile devices' energy usage for video delivery, utilising the now well-established potential to predict future channel conditions in cellular networks. Employing in-network caching, we set a strict buffer constraint which provides zero buffer underflow to improve Quality of Experience. Our study provides

In situ light dosimetry during whole bladder wall photodynamic therapy : clinical results and experimental verification

Photodynamic therapy (PDT) using Photofrin IIR (PII) as a photosensitizer is currently being evaluated as a new treatment modality for superficial bladder cancer. An optimum therapeutic ratio requires uniform illumination of the whole bladder wall and accurate light dosimetry. The first clinical light dosimetry results (16 patients) are reported, obtained using a system which allows in situ measur

Conduction Band Offset and Polarization Effects in InAs Nanowire Polytype Junctions

Although zinc-blende (ZB) and wurtzite (WZ) structures differ only in the atomic stacking sequence, mixing of crystal phases can strongly affect the electronic properties, a problem particularly common to bottom up-grown nanostructures. A lack of understanding of the nature of electronic transport at crystal phase junctions thus severely limits our ability to develop functional nanowire devices. I

Relating ICT to organizational change in research and practice

The topic of ICT-enabled organizational change has been a focus of attention in information systems (IS) research for decades. Besson and Rowe (J Strateg Inf Syst 21:103-124, 2012 [17]), however, have identified a lack of description and conceptualization of the transformation process in the main stream of IS research. This paper discusses key IS paradigms in some of the content of commonly and av

Spotted phenotypes in horses lost attractiveness in the Middle Ages

Horses have been valued for their diversity of coat colour since prehistoric times; this is especially the case since their domestication in the Caspian steppe in ∼3,500 BC. Although we can assume that human preferences were not constant, we have only anecdotal information about how domestic horses were influenced by humans. Our results from genotype analyses show a significant increase in spotted

Intraspecific variation in Rhinanthus angustifolius. Local adaptation, phenotypic plasticity and geographical structure.

Svensk sammanfattningUnder de senaste hundra åren har kulturlandskapet i norra Europa genomgått en dramatisk förändring. Det småskaliga jordbrukslandskapet med sin mosaik av naturtyper har till stor del ersatts av vidsträckta monokulturer. Artrika naturtyper och naturområden har blivit ovanligare och ligger idag ofta isolerats från varandra. Som en följd av detta har många arter gått tillbaka, visPlant species often adapt to local environmental conditions, which can result in the formation of genetically and phenotypically distinct ecotypes. Ecotypes can evolve rapidly, and may be a first step in the process of ecological speciation. Consequently, ecotypes may constitute an important part of the biodiversity in regions with a young flora, where few endemic taxa at the species level have ha

Flödessamhället och dess sårbarhet

I denna publikation görs en noggrann genomgång av bakgrunden till dagens flödesbaserade samhälle med dess sårbarhet. Vidare diskuteras frågan hur flödesbaserade avbrottsrisker definieras samt hur dess konsekvenser, inklusive s.k. domino-effekter, kan beskrivas. Även de teoriområden som tar upp denna typ av risker behandlas.Dagens moderna samhälle är till stor del uppbyggt kring försörjningskedjor

“My Silk Road to You” : Re-imagining routes, roads, and geography in contemporary art of “Central Asia”

This paper re-focuses the Silk Road discussions from the position of contemporary art in Central Asian region. Since the late 1980s contemporary art in Central Asia boomed and it eventually became an alternative public space for the discussion of cultural transformations, social and global processes and problems that local societies faced. Initially the questions raised by many artists concerned i

Toward clinical use of the IgG specific enzymes IdeS and EndoS against antibody-mediated diseases

The endoglycosidase EndoS and the protease IdeS from the human pathogen Streptococcus pyogenes are immunomodulating enzymes hydrolyzing human IgG. IdeS cleaves IgG in the lower hinge region, while EndoS hydrolyzes the conserved N-linked glycan in the Fc region. Both enzymes are remarkably specific for human IgG that after hydrolysis loses most of its effector functions, such as binding to leukocyt