Wyniki wyszukiwania - Biblioteka Nauki

1

Glacier lake outburst flood on James Ross Island, Antarctic Peninsula Region

100%

Sone T. , Fukui K. , Strelin J. A. , Torielli C. A. , Mori J.

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2007

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tom 28

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nr 1

EN

A glacier lake outburst flood occurred on James Ross Island, Antarctic Peninsula region, during the 2004-2005 austral summer season. The source lake was located on the Lachman II ice-cored rock glacier, and formed prior to 1980. The size of the lake has been increasing gradually since the 1990s. The lake basin extended to approximately 220 m in length and 160 m in width by the end of February 2005. We observed that the lake had drained by February 2005, and found a deep gully on the south side of the lake rim. It appears that the lake level rose and water overflowed the lake rim here. James Ross Island contains a large number of debris-covered glaciers, ice-cored moraines, and rock glaciers with glacier lakes which are dammed by these features or which form upon them. As climatic warming has recently been reported for this region, further glacier lake outburst floods seem likely to occur.

2

Ground penetrating radar sounding on an active rock glacier on James Ross Island, Antarctic Peninsula region

100%

Fukui K. , Sone T. , Strelin J. , Torielli C. , Mori J.

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2007

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tom 28

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nr 1

EN

This study used ground penetrating radar soundings to examine a tongue-shaped rock glacier (64°04'S 58°25'W) on James Ross Island, Antarctic Peninsula, in January 2005. The rock glacier studied has multiple well-developed transverse ridges and approximately 800 m long from the talus of its head to its frontal slopes and is 300 m wide in the middle. The longitudinal ground penetrating radar profile identified debris bands which dip up-glacier, similar to the thrust structures in the compression zone of a valley glacier. Transverse ground penetrating radar profiles indicated a layered structure which is inclined towards the central part of the rock glacier and which resembles the transverse foliation of a valley glacier. Consequently, the internal structure of the rock glacier is revealed as being similar to the "nested spoons" common in the interior of valley glaciers. We concluded that this rock glacier has been created by the deformation of a glacier ice core and a thick and continuous debris mantle.

3

Low-cost 320 x 240 uncooled IRFPA using conventional silicon IC process

86%

Ishikawa T. , Ueno M. , Endo K. , Nakaki Y. , Hata H. , Sone T. , Kimata M.

Opto-Electronics Review

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1999

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tom Vol. 7, No. 4

297-303

EN

A 320 x 240 uncooled infrared focal plane array (IRFPA) with series PN junction diodes fabricated on a silicon-on-insulator (SOI) wafer has been developed. Resistive bolometers, pyroelectric detectors and thermopile detectors have been reported for large scale uncooled IRFPAs, while the detector developed uses the temperature dependence of forward-biased voltage of the diode. The diode has low 1/f noise because it is fabricated on the monocrystalline SOI film which has few defects. The diode is supported by buried silicon dioxide (BOX) film of the SOI wafer, which becomes a part of a thermal isolated structure by using bulk silicon micromachining technique. The detector constains an absorbing membrane with a high fill factor of 90% to achieve high IR absorption, and the readout circuit of the FPA constains a gate modulation integrator to suppress the noise. Low cost IRFPA can be supplied because the whole structure of the FPA is fabricated on commercial SOI wafers using a conventional silicon IC process.

4

PtSi Schottky-barrier infrared focal plane arrays

72%

Kimata M. , Ueno M. , Yagi H. , Shiraishi T. , Kawai M. , Endo K. , Kosasayama Y. , Sone T. , Ozeki T. , Tsubouchi N.

Opto-Electronics Review

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1998

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tom Vol. 6, No. 1

1-10

EN

The focal plane array (FPA) technology based on the PtSi Schottky-barrier (SB) photoemissive detector is presented. Taking advantage of Si-compatible manufacturing processes and high responsivity uniformity, we have developed a series of 2-dimensional PtSi SB FPAs with array sizes from 256 x 256 to 1040 x 1040 elements for medium wavelength thermal imaging, and two spaceborne long linear FPAs with 4096-element x 4-band and 2100-element x 6-band for short wavelength remote sensing applications. Along with design and performance of the FPAs, this paper reports on the Charge Sweep Device readout architecture, which is a key technology for high performance 2-D FPAs. A high reliability and high planarity packaging technology for large FPAs is also described.

5

An introduction of high-precise 3D measurement system and its applications

58%

Hashimoto T. , Kaneko M. , Rövid A. , Isono S. , Sone T. , Baba K. , Fukuda A. , Aniya M. , Naito N. , Enomoto H. , Skvarca P.

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tom Vol. 3, No. 4

25-28

EN

We have been studying the high-precision three-dimensional measurement system using cameras. In this paper, our system is verified, and its application is reported. The principle of our measurement system is based on the stereo measurement. In our system, reducing the quantization error by numerical processing can realize the highprecision 3D measurement at the long distance. This measurement system has many applications, such as industrial use, ITS, robotics, and many others. Our system has been applied on the observation of the glacier. The Perito Moreno glacier, which is our target, moves very fast and the moving speed is reported as about 2 m/day. Then, it is thought that the important information about the global warming can be obtained by observing this glacier. But, as the width of the glacier is several km, there were no reports of continuously observing the movement of the glacier in high accuracy. As a result, the unique observation results about the daily movement of the glacier were measured. The observation of the glacier flow was carried out for the third straight year. In this paper, the valuable results of the glacier observation and experimental results to verify the precision are discussed.