1,250 research outputs found
新規に構築したコンピュータパイプラインを利用したMMEJノックインの自動設計及び詳細プロファイリング
内容の要約広島大学(Hiroshima University)博士(理学)Doctor of Sciencedoctora
Transit Time Effect on Voltage Contrast in the Stroboscopic Scanning Electron Microscope
Voltage contrast varies if the specimen voltage changes within the secondary electron transit time through the specimen electric field. This effect would affect the time resolution in stroboscopic scanning electron microscopy. The method to calculate the transit time effect that was described in a previous paper is reviewed. The calculated results agreed well with the experiment in which a specially designed specimen is used to estimate the applied voltage as exactly as possible
Huge Seebeck coefficients in non-aqueous electrolytes
The Seeebeck coefficients of the non-aqueous electrolytes tetrabutylammonium
nitrate, tetraoctylphosphonium bromide and tetradodecylammonium nitrate in
1-octanol, 1-dodecanol and ethylene-glycol are measured in a temperature range
from T=30 to T=45 C. The Seebeck coefficient is generally of the order of a few
hundreds of microvolts per Kelvin for aqueous solution of inorganic ions. Here
we report huge values of 7 mV/K at 0.1M concentration for tetrabutylammonium
nitrate in 1-dodecanol. These striking results open the question of
unexpectedly large kosmotrope or "structure making" effects of
tetraalkylammonium ions on the structure of alcohols.Comment: Submitted to J. Chem. Phy
Observation of superspin glass state in magnetically textured ferrofluid (gamma-Fe2O3)
Magnetic properties in a magnetically textured ferrofluid made out of
interacting maghemite (gamma-Fe2O3) nanoparticles suspended in glycerin have
been investigated. Despite the loss of uniform distribution of anisotropy axes,
a superspin glass state exists at low temperature in a concentrated, textured
ferrofluid as in the case of its non-textured counterpart. The onset of
superspin glass state was verified from the sample's AC susceptibility. The
influence of the anisotropy axis orientation on the aging behavior in the
glassy states is also discussed
Thermoelectric energy recovery at ionic-liquid/electrode interface
A Thermally Chargeable Capacitor containing a binary solution of
1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)-imide (EMIMTFSI) in
acetonitrile is electrically charged by applying a tempera- ture gradient to
two ideally polarisable electrodes. The corresponding thermoelectric
coefficient is -1.7 mV/K for platinum foil electrodes and -0.3 mV/K for
nanoporous carbon electrodes. Stored electrical energy is extracted by
discharging the capacitor through a resistor. The measured capacitance of the
electrode/ionic- liquid interface is 5 micro F for each platinum electrode
while it becomes four orders of magnitude larger mF for a single
nanoporous carbon electrode. Reproducibility of the effect through repeated
charging-discharging cycles under a steady-state temperature gradient
demonstrates the robustness of the electrical charging pro- cess at the
liquid/electrode interface. The acceleration of the charging by convective
flows is also observed. This offers the possibility to convert waste-heat into
electric energy without exchanging electrons between ions and electrodes, in
contrast to what occurs in most thermogalvanic cells.Comment: 8 pages, 11 figure
ANTI-HIPERTENSORES EM ENFERMAGEM GERAL
A autora faz comentários sobre os agentes anti-hipertensivos mais usuais na enfermaria, dando especial enfoque à participação da enfermeira, que desempenha papel cada vez mais relevante para o pleno sucesso da prescrição médica.The author comments about the more commonly used anti-hipertensive agents in the nurse-yard, emphasizing the nurse's participation which becomes gradually more important for the complete success of the medical prescription
Thermopower peak in phase transition region of (1-x)LaCaMnO/xYSZ
The thermoelectric power (TEP) and the electrical resistivity of the
intergranular magnetoresistance (IGMR) composite,
(1-x)LaCaMnO/xYSZ (LCMO/YSZ) with x = 0, 0.75%, 1.25%,
4.5%, 13% 15% and 80% of the yttria-stabalized zirconia (YSZ), have been
measured from 300 K down to 77 K. Pronounced TEP peak appears during the phase
transition for the samples of x 0, while not observed for x = 0. We suggest
that this is due to the magnetic structure variation induced by the lattice
strain which is resulting from the LCMO/YSZ boundary layers. The transition
width in temperature derived from , with being the AC magnetic
susceptibility, supports this interpretation.Comment: 4 pages, 4 eps figures, Latex, J. Appl. Phys 94, 7206 (2003
Intrinsic Low Temperature Paramagnetism in B-DNA
We present experimental study of magnetization in -DNA in
conjunction with structural measurements. The results show the surprising
interplay between the molecular structures and their magnetic property. In the
B-DNA state, -DNA exhibits paramagnetic behaviour below 20 K that is
non-linear in applied magnetic field whereas in the A-DNA state, remains
diamagnetic down to 2 K. We propose orbital paramagnetism as the origin of the
observed phenomena and discuss its relation to the existence of long range
coherent transport in B-DNA at low temperature.Comment: 5 pages, 4 figures, submitted to Physical Review Letters October 200
Nondestructive Testing Using Magnetic Field Visualization Technique
This paper describes a new technique to detect cracks or flaws in conducting or ferromagnetic materials using a magnetic field visualization system. In this system there are two sources for magnetic field generation, i.e. electrical current and magnetization. And the magnetic field generated by the source could give us useful information on cracks or flaws included in the material. Thus, visualization of magnetic field would enable us to identify the shape and size of cracks. We developed a preliminary system to verify the validity of the speculation and applied it to both ferromagnetic and conducting materials with flaws. The applicability of magnetic visualization has been confirmed to be an effective method in NDE and diagnosis of magnetic equipments in the present experiment. Furthermore, combination of this method with numerical prediction could demonstrate more potential capability in the field of NDE</p
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