The phase noise of quantum dot lasers is investigated theoretically by coupling the Langevin noise sources into the rate equations. The off-resonant populations in the excited state and in the carrier reservoir contribute to the phase noise of ground-state emission lasers through the phase-amplitude coupling effect. This effect arises from the optical-noise induced carrier fluctuations in the o...

The state of the art in self-consistent numerical modeling of semiconductor devices is reviewed. The physical assumptions which are required to describe carrier transport are discussed. Particular emphasis is put on the models for space charge, carrier mobility, carrier temperature, and carrier generationrecombination. Investigations about three-dimensional effects due to the field oxide in MOS...

background: free-living amoebae (fla) including acanthamoeba spp. and hartmannella spp. are the causative agents of serious corneal infection especially within contact lens wearers. thus contact lenses and their storage case could be a suitable niche for potentially pathogenic amoebae. the main objective of the present study was to evaluate the contamination of contact lenses to free living amo...

background: plasmodium vivax is the most widespread species of plasmodium in humans and causing about 80 million clinical cases annually. this study was under-taken to detect p. vivax in asymptomatic treated vivax malaria patients to trace la-tent/sub-patent malaria infection. method: the venous blood of all detected cases with p. vivax in bashagard, minab and roodan districts in hormozgan prov...

We used PET scans with the tracers [18F]fluorodeoxyglucose (FDG) and [11C]raclopride (RACLO) to study glucose metabolism and dopamine D2 receptor binding in the caudate nucleus and putamen of 18 carriers of the Huntington's disease gene mutation (10 asymptomatic subjects and eight untreated symptomatic Huntington's disease patients in an early disease stage). We also performed MRI scans and mea...

The mitochondrial ADP/ATP carrier plays a central role in aerobic cell energetics by providing to the cytosol the ATP generated by oxidative phosphorylation. Though discovered around 40 years ago owing to the existence of unique inhibitors and in spite of numerous experimental approaches, this carrier, which stands as a model of the mitochondrial solute carriers keeps some long-standing mystery...