An expression for the spacetime absorption coefficient of a scalar field in a five dimensional, near extremal black hole background is derived, which has the same form as that presented by Maldacena and Strominger, but is valid over a larger, U-duality invariant region of parameter space and in general disagrees with the corresponding D-brane result. We develop an argument, based on D-brane the...

BACKGROUND AND PURPOSE We investigated the relationship between magnetic resonance imaging-visible centrum semiovale perivascular spaces (CSO-PVS), a biomarker of impaired interstitial fluid drainage, and positron emission tomography-based amyloid-β burden across a wide range of cerebrovascular amyloid deposition. METHODS Thirty-one nondemented subjects (11 probable cerebral amyloid angiopath...

A thermal Microwave Emission Model of Layered Snowpacks (MEMLS) was developed for the frequency range, 5 to 100 GHz. It is based on radiative transfer, using six-flux theory to describe multiple volume scattering and absorption, including radiation trapping due to total reflection and a combination of coherent and incoherent superpositions of reflections between layer interfaces. The scattering...

We present a comparison between an exact calculation of radiative transfer in SF6 thermal plasma based on a fine description of the spectrum with 300 000 spectral points for each temperature value, for simplified conditions (1D and 2D geometries with imposed symmetrical temperature profiles and Local Thermodynamic Equilibrium) and two kinds of approximated calculations. The first is the classic...

Recent research has indicated that up to 73% of the methyl bromide (MeBr) applied to agricultural farmland is ultimately emitted to the atmosphere despite the practice of complete coverage of the fields with polyethylene (PE) tarp. To reduce the emission of MeBr, several techniques have been investigated. An alternative that has received little consideration is the collection and recycle or tre...

In this paper a model of the quasineutral plasma and the transition between the plasma and the dielectric wall in a Hall thruster channel is developed. The plasma is considered using a two-dimensional hydrodynamic approximation while the sheath in front of the dielectric surface is considered to be one dimensional and collisionless. The dielectric wall effect is taken into account by introducin...

The assimilation potential (assimilative capacity) of the atmosphere can be represented in two ways: one as the ventilation coefficient and the other as the dispersion potential of emission loads discharged into the region. In the present study, the atmospheric assimilation potential of a typical urban area in Kochi city has been determined with respect to sulfur dioxide (SO(2)). The ventilatio...

Mercury has a well-known history in Japan as pollutant which caused severe damage to the environment and to human health, even leads to the world treaty of The Minamata convention on mercury in order to prevent its environmental damages. Therefore it is important to evaluate the mercury concentration in environmental media of: the atmosphere, the water, the soil, and the sediment. Lake Biwa-Yod...

Studying the driving factors and contributions of carbon emissions peak volume and time is essential for reducing the cumulative carbon emissions in developing countries with rapid economic development and increasing carbon emissions. Taking Jilin Province as a case study, four scenarios were set in this paper respectively: Business as Usual Scenario (BAU), Energy-Saving Scenario (ESS), Energy-...

The reaction of atomic hydrogen with isocyanic acid (HNCO) to produce the amidogen radical (NHZ) and carbon monoxide, (W)) H + HNCO NH2 + CO has been studied in shock-heated mixtures of HNCO dilute in argon. Time-histories of the ground-state NHZ radical were measured behind reflected shock waves using cw, narrowlinewidth laser absorption at 597 nm, and HNCO time-histories were measured using i...