The K-band polarization of 18 stars toward Heiles Cloud 2 in the Taurus dark cloud complex has been measured to investigate structure magnetic field this cloud. observed vectors are well aligned, with a mean position angle ~50°, which is perpendicular direction elongation This indicates that formed by contraction along field, resulting flattened shape.

Understanding the distribution of physical properties around shallow subducting plate interfaces, where both destructive and "slow" earthquakes occur due to rapid slower fault slips, respectively, presents a major scientific disaster mitigation challenge. Pore water is key factor in understanding different slip mechanisms their spatial relationships; however, its remains understudied. In this study, based on marine magnetotelluric survey Hyuga-nada, southwestern Japan, we identified distinct...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> In high temperature superconducting (HTS) AC applications, HTS tapes are assembled into a conductor with current capacity and transport in an magnetic field generated by currents neighboring tapes. It is important to clarify the loss characteristics of each tape conductor. </para>

金属鉱床探査などを目的とした自然電位探査は,陸上では従来から行われている。水中においても自然電場探査は行われており,近年では深海における自然電場観測によって海底熱水鉱床を探査する試みも始まっている。海水中では自然電位信号が小さいため,電場データに混入したノイズを除去する必要がある。しかし,複数の並行観測データを足し合わせて平均化する従来の手法(スタッキング)では,並列データに混入したノイズの間に相関が認められる場合,このノイズを除去することは難しい。そこで,海底下からの電場信号とノイズの独立性に着目し,独立成分分析(Independent Component Analysis : ICA)と呼ばれる多成分の混合信号を複数の独立な信号に分離する手法を用いて,ノイズの除去および信号の抽出を試みた。

The magnetotelluric (MT) method has been used for visualizing subsurface resistivity structures and more recently monitoring changes. However, electromagnetic data often include cultural noise, which can cause errors in the estimation of MT response functions structure analysis. Frequency-domain independent component analysis (FDICA) offers advantages processing particularly because this extract hidden components observed data. These be decomposed into natural signals noise so that effect...

A melt-textured YBCO bulk material was employed to obtain high current transport characteristics of a temperature superconductor. disk-shaped 65 mm in diameter and 15 thick fabricated by modified quench melt growth (QMG) process. An "H" shaped conductor cut from the disk. The cross sectional area length were 7 mm/spl times/7 20 mm, respectively. mounted bus line with conductor-holder which allows feed mechanical support against thermal stress electromagnetic force. Both ends soldered...

Abstract We have installed an underground electromagnetic observation room in the Hosokura mine Miyagi Prefecture (Hosokura room) to observe variation atmospheric signals. In this room, we set up a large plate electrode signal of electricity. With this, observed co‐seismic phenomena. During two medium earthquakes that occurred on 27 and 29 February 2004, clear signals potential room. A model appearance these is examined explain data. © 2006 Institute Electrical Engineers Japan. Published by...

Abstract Surface movement over a Steam Assisted Gravity Drainage (SAGD) operation can be related to production and injection. The amount location of surface change indicate the thermal dilation within reservoir may provide an indication conformance. While deformation expected in SAGD is depth stratigraphy, typical ground approximately 2-5 cm/year. This represents relatively slow inflationary process ground. confused with changes that are seasonal including water level muskeg, for instance....

We present the results of ongoing multi-year monitoring ground deformation over an oil field in Southern California, USA. Deformation measurements were obtained from a 12 year time-series repeat-pass interferometric acquisitions multiple satellite SAR sensors beam modes. The independent each mode integrated into unified cross-stack inversion to obtain cumulative at very fine temporal resolution (as as few days). precision estimates was improved versus single-stack interferometry due...

The effects of localized source currents on Earth's magnetotelluric (MT) responses have been reported in the literature terms changes period and subsurface structure. focus this study is bias within MT arising from variations vertical horizontal distances current. at 20 200 s were calculated various A slight change distance causes a shift responses, large, especially over altitudes explored data analysis (i.e., 100-150 km), where E layer exists. field varies because distribution conductivity...

<title>Abstract</title> Shallow subducting plate interfaces, as sites of both destructive and “slow” earthquakes, resulting from rapid slower fault slips, respectively, present a major scientific disaster mitigation challenge. Although understanding the different slip mechanisms their spatial relationships is critical, role key factor, pore fluids, understudied. Here we clear observational evidence Hyuga-nada, southwestern Japan, that pore-fluid distribution correlates with rupture behavior....

Using standard nuclear magnetic resonance (NMR) technique and a well-fabricated sample, we have succeeded in directly observing local field generated by micromagnet Ni45Fe55 (with thickness of 400nm), which was sputtered on an Al layer 20nm thickness. Improved sensitivity our NMR enabled us to clearly observe Al-NMR signals, are confirmed come from nuclei the layers. From analysis spectra, found be +0.17±0.02 (−0.20±0.01)T, sign is consistent with geometry that external applied perpendicular...

Abstract Spatial gradients in the primary geomagnetic fields directly contribute to both amplitudes and phases of inter-station transfer functions (IS-TFs). This suggests that, for analysis subsurface resistivity structures, IS-TFs should be carefully treated by checking establishment plane-wave assumption. Geomagnetic time-series data include various complicated characteristics accordingly, time–frequency domain is suitable discussion spatial time-varying fields. However, such evaluations...

The annealing behavior of electrical resistivities perpendicular and parallel to the basal plane heavily nitrogen-doped 4H-SiC crystals was investigated. temperature dependencies exhibited characteristic behaviors after multiple rounds high-temperature (1100°C, 30 min). High-temperature induced stacking fault formation various extents in crystals. Based on these results, we discuss cause mechanism observed annealing-induced changes

This report proposes a new method which can detect internal weld defect areas appearing in X-ray radiographic films, and verifies its efficiency using actual images. The has robustness against noise blurred images, because each pixel of image votes for an area decided by the direction gradient vector pixel. And classify into defective indefective thresholding voted image. results images are as follows, (1) more than 90% defects 125 detected, (2) 85% their characteristic shape found.

Electromagnetic data are obtained by magnetotelluric (MT) surveys, but often contain noises. If the noises coherent and strong among electric magnetic fields, MT response functions indicate large errors, resulting in false images of subsurface structure. In this study, we propose Frequency Domain Independent Component Analysis (FDICA) for analysis, which is used sound-wave analysis. For testing noise reduction performance using FDICA, various hypothetical were added to observed data. As a...

The magnetic field geometry in the central regions of two dark clouds has been mapped by measuring polarization at 2.2 μm background stars and embedded clouds. observations were done with Kyoto polarimeter on Agematsu 1m IR telescope December 1984 for Heiles Cloud 2 Taurus cloud complex, UKIRT 3.8m May July 1985 ρ Ophiuchus core. main results are: i) Most both show their maxima are 2.7% 7.6% Oph, respectively. There similar positive relations between degree extinct ion A v 's. ii)...