We describe the design and characterization of a new variable low-temperature scanning tunneling microscope @TM) which has been proven to give atomic resolution at temperatures between 77 K and room temperature but which is also capable of performing experiments as low as 4 K. The STM “head” itself consists of a unique cold dewar made up of an upper and lower reservoir connected together by two...

Oxygen actual and relative deficits in Jurumirim Reservoir were computed from the temperature and dissolved oxygen profiles determined in a study from March 1988 to March 1989. The reservoir presented an isothermy from June to September and a thermal stratification from October to March. Thermocline was always located at the 1/3 deeper zone of the-water column. Clinograde oxygen profiles were o...

In the present study, we investigated the feasibility of the vaginal administration of drospirenone silicone IVR. The in vitro release characteristics of matrix-type and reservoir-type IVR were compared under sink conditions in 21 days. At the same time, API excipients compatibility and preformulation study was performed by HPLC, IR, and DSC methods. Biocompatibility of reservoir system was eva...

Establishment of new plant varieties is getting important due to tremendous increase in population and changes in the human food behaviors. This leads towards the demand of new techniques and varieties in plant productions. Therefore some of the wild species and some other important plants species are in the extinction condition. Germplasm conservation of some of the important species is essent...

We study a quantum quench for a semiconductor quantum dot coupled to a fermionic reservoir, induced by the sudden creation of an exciton via optical absorption. The subsequent emergence of correlations between spin degrees of freedom of dot and reservoir, culminating in the Kondo effect, can be read off from the absorption line shape and understood in terms of the three fixed points of the sing...

Vast quantities of natural gas are held in hydrate form in geologic reservoirs in sub-oceanic sediments and arctic permafrost zones (KVENVOLDEN, 1988; SLOAN, 1998), where conditions of high pressure and low temperature are within the hydrate stability region. In 1995, the U.S. Geological Survey (USGS) conducted a study to assess the quantity of natural gas hydrate resources in the United States...

Quantum fluctuations of Coulomb blockade are investigated as a function of the coupling to reservoirs in semiconductor quantum dots. We use fluctuations in the distance between peaks ∆N apart to characterize both the amplitude and correlation of peak motion. For strong coupling, peak motion is greatly enhanced at low temperature, but does not show the expected increase in peak-to-peak correlati...

Superconducting order and magnetic impurities are usually detrimental to each other. We show, however, that in nanoscopic objects the induced electron pairing can have constructive influence on the Kondo effect originating from the effective screening interactions. Such situation is possible at low temperatures in the quantum dots placed between the conducting and superconducting reservoirs, wh...

We consider a model of heat conduction introduced in [6], which consists of a finite nonlinear chain coupled to two heat reservoirs at different temperatures. We study the low temperature asymptotic behavior of the invariant measure. We show that, in this limit, the invariant measure is characterized by a variational principle. The main technical ingredients are some control theoretic arguments...

Quantum fluctuations of the Coulomb blockade are investigated as a function of the coupling to reservoirs in semiconductor quantum dots. We use fluctuations in the distance between peaks DN apart to characterize both the amplitude and correlation of peak motion. For strong coupling, the peak motion is greatly enhanced at low temperature, but does not show the expected increase in peak-topeak co...