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In this work we present laboratory measurements on the reduction of the threshold friction velocity necessary for lifting dust if the dust bed is illuminated. Insolation of a porous soil establishes a temperature gradient. At low ambient…

地球与行星天体物理 · 物理学 2015-08-06 Markus Küpper , Gerhard Wurm

Magnesium (Mg) and its alloys have a great potential as structural materials due to their beneficial combination of high strength to weight ratio, high thermal conductivity and good machinability. However, few literatures about Mg coatings…

Monte-Carlo simulation technique has been used to investigate the effect of temperature and adsorbed gases on the composition profile of unsupported Pt-Rh nanocatalysts. For a 2406 atom fcc cubo-octahedral Pt$_{\rm{}50}$Rh$_{\rm{}50}$…

材料科学 · 物理学 2009-11-07 Abir De Sarkar , Badal C. Khanra

We used infrared data from the Lunar Reconnaissance Orbiter (LRO) Diviner Lunar Radiometer Experiment to globally map thermophysical properties of the Moon's regolith fines layer. Thermal conductivity varies from 7.4$\times$10$^{-4}$ W…

We report new laboratory studies of the radiation-induced destruction of glycine-containing ices for a range of temperatures and compositions that allow extrapolation to Martian conditions. In-situ infrared spectroscopy was used to study…

天体物理仪器与方法 · 物理学 2015-02-11 P. A. Gerakines , R. L. Hudson

We report on the design and implementation of a rotating sample magnetometer (RSM) operating in the variable temperature insert of a cryostat equipped with a high-field magnet. The limited space and the cryogenic temperatures impose the…

超导电性 · 物理学 2015-05-28 M. Eisterer , F. Hengstberger , C. S. Voutsinas , N. Hörhager , S. Sorta , J. Hecher , H. W. Weber

Measuring thermodynamic quantities can be easy or not, depending on the system that is being studied. For a macroscopic object, measuring temperatures can be as simple as measuring how much a column of mercury rises when in contact with the…

量子物理 · 物理学 2015-09-15 O. P. de Sá Neto , M. C. de Oliveira , G. J. Milburn

We demonstrate temperature measurement of a sample attached to the end of a cantilever using cantilever magnetometry of solid air ``contamination'' of the sample surface. In experiments like our Magnetic Resonance Force Microscopy (MRFM),…

仪器与探测器 · 物理学 2009-11-07 Kent R. Thurber , Lee E. Harrell , Doran D. Smith

The temperature dependence of a system exhibiting a `metal-insulator transition in two dimensions at zero magnetic field' (MIT) is studied up to 90K. Using a classical scattering model we are able to simulate the non-monotonic temperature…

强关联电子 · 物理学 2015-06-24 V. Senz , T. Ihn , T. Heinzel , K. Ensslin , G. Dehlinger , D. Grützmacher , U. Gennser , E. H. Hwang , S. Das Sarma

The liquidus temperature is an important parameter in understanding the crystalline behavior of materials and in the operation of blast furnaces. Its modeling can be carried out by linear and nonlinear methods through data, considering the…

材料科学 · 物理学 2023-07-24 Patrick dos Anjos , Lucas A. Quaresma , Marcelo L. P. Machado

The mechanical response, serviceability, and load bearing capacity of materials and structural components can be adversely affected due to external stimuli, which include exposure to a corrosive chemical species, high temperatures,…

材料科学 · 物理学 2016-07-20 C. Xu , M. K. Mudunuru , K. B. Nakshatrala

The Linear Mixing Approximation (LMA) is often used in planetary models for calculating the equations of state (EoSs) of mixtures. A commonly assumed planetary composition is a mixture of rock and water. Here we assess the accuracy of the…

地球与行星天体物理 · 物理学 2024-11-27 Valiantsin Darafeyeu , Stephanie Rimle , Guglielmo Mazzola , Ravit Helled

We present full characterisation of acoustic wave devices based on the fully synthetic crystalline material at the liquid helium temperature range { required for the design of ultra low loss mechanical systems in many areas of research…

材料科学 · 物理学 2014-10-17 Maxim Goryachev , Philippe Abbe , Bernard Dulmet , Roger Bourquin , Serge Galliou

A set of thin film Mn$_x$Si$_{1-x}$ alloy samples with different manganese concentration x = 0.44 - 0.63 grown by the pulsed laser deposition (PLD) method onto the Al$_2$O$_3$(0001) substrate was investigated in the temperature range 4 -…

We demonstrate a facile and scalable technique, rotational freezing, to produce porous tubular ceramic supports with radially aligned porosity. The method is based on a conventional ice-templating process in a rotatory mold and demonstrated…

Er3Fe5-xAlxO12 (0.0 < x < 0.8) garnets were prepared by ball milling and sintering at 1300 C. Rietveld refinement of the samples revealed a garnet structure with Ia3d symmetry. The lattice parameter, cell volume, X-ray density and…

材料科学 · 物理学 2019-06-04 Ibrahim Bsoul , Khaled Hawamdeh , Sami H. Mahmood

Ceramic samples, produced by conventional sintering method in ambient air, 6H-SrMnO$_3$(6H-SMO), 15R-BaMnO$_3$(15R-BMO), 4H-Ba$_{0.5}$Sr$_{0.5}$MnO$_3$(4H-BSMO) were studied. In the XRD measurements for SMO the new anomalies of the lattice…

Tungsten is considered as one of the most promising materials for nuclear fusion reactor chamber applications. Wire + Arc Additive Manufacturing has already demonstrated the ability to deposit defect-free large-scale tungsten structures,…

The Mars Atmosphere-Ice Coupler MAIC-2 is a simple, latitudinal model, which consists of a set of parameterisations for the surface temperature, the atmospheric water transport and the surface mass balance (condensation minus evaporation)…

地球物理 · 物理学 2010-04-28 Ralf Greve , Bjoern Grieger , Oliver J. Stenzel

We report on the design, fabrication, and implementation of ultrasensitive micromechanical oscillators. Our ultrathin single-crystal silicon cantilevers with integrated magnetic structures are the first of their kind: They are fabricated…

介观与纳米尺度物理 · 物理学 2007-05-23 Michelle D. Chabot , John M. Moreland , Lan Gao , Sy-Hwang Liou , Casey W. Miller