スマートフォン位置特定フレームワークに関する一検討

本稿では，あらゆる場所での正確かつ高精度な位置特定(シームレスな位置特定) を市販のスマートフォンで実現するために，スマートフォンで利用可能な位置特定サブシステムを適切に組み合わせる「スマートフォン位置特定フレームワーク」について検討を行っている．まず，現在のスマートフォンで利用可能な位置特定サブシステムの一般的な精度や組み合わせを，位置情報の種類の観点で整理している．また，位置特定精度について，4 段階の定義を新たに行っている．そして，LBS(Location-Based Services) についての既存の研究から位置特定に関するLBS の要求として，位置情報の種類，確度および精度，計算コスト，追跡の有無の4 つの観点で整理を行っている．これらのLBS の要求の組み合わせを元に，LBS のカテゴリ分けを行い，現時点での位置特定サブシステムの組み合わせの例を示している．これらを通じて，スマートフォン位置特定フレームワークに基づくシームレスな位置特定環境の実現に向けた知見を得ている． This paper considers a smartphone positioning framework for seamless positioning to provide high quality service of location-based services (LBS). First, the general precision and combinations of positioning sub-systems at the present time are organized in terms of the type of location information. In addition, four new levels of definition are made for positioning precision. Then, based on the existing research on LBS, the requirements of LBS for positioning are arranged as follows: the type of location information, the required precision and accuracy, the calculation cost, and the presence or absence of tracking. Based on the combination of these LBS requirements, the categorization of LBS is performed, and examples of the combination of positioning sub-systems at the present time are shown. Consequently, the knowledge for realizing seamless positioning environments based on the smartphone positioning framework are obtained.Copyright ©2019 by IEICEtextapplication/pdftechnical repor

A Report of Teaching Practice

departmental bulletin pape

Observation of the DsJ(2317) and DsJ(2457) in B Decays

journal articl

IGUSA LOCAL ZETA FUNCTION OF THE QUADRATIC FORM x_{1}^{2}+cdots+x_{n}^{2}

application/pdfThe purpose of this paper is to give the explicit form of Igusa local zeta function associated to the quadratic form x_{1}^{2}+cdots+x_{n}^{2}.departmental bulletin pape

Highly Arsenic-contaminated Areas in Bangladesh and Development of Multi Gravel Sand Filte

In Bangladesh, many arsenic mitigations have been conducted these 22 years since the first detection of As-contamination of groundwater in 1993. A DPHE/JICA report made clear the situation of arsenic mitigation in 2010. According to the report, 19 million people do not have access to any safety water options （SWOs） yet, and also 4.6 million people are still living where As-contaminated ratio is more than 80% but safe water coverage is less than 20%. It is the worst As-contaminated areas. The Asia Arsenic Network （AAN） had the chance to study the situations of As-mitigation and construct SWOs in some of these worst areas. There were many highly As-contaminated tube wells （As>0.5mg/L） with low Fe-concentrations. AIRP/GSF, used considerably in Bangladesh, can not be applied to these highly As-contaminated tube wells because that the iron concentratIon in tube well water needs to satisfy the condition of Fe/As>20. In order to supply safe water in the highly As-contaminated areas, an improved GSF （multi GSF） is now being developed. This paper describes the situations of highly As-contaminated areas and the improved GSF under development.othe

ラット線条体脳出血モデルの自然経過について : 大脳皮質運動野でのニューロン樹状突起の変化に着目して

(理学療法基礎系32)journal articl

Improvement in Quality of Protein Crystals Grown in a High Magnetic Field Gradient

Space-based microgravity environments have been utilized to obtain a highly ordered crystal because of the lack of gravity-induced convection. A superconducting magnet-based quasi-microgravity is also expected to contribute to the enhancement of the quality of protein crystals. We here report a case study on protein crystallization using fifteen kinds of samples in a magnetic field gradient, which was sufficient for magnetic levitation of water droplets. In three cases, rod-type crystals were aligned perpendicular to the crystallization plate, exhibiting magnetic orientation parallel to the direction of the magnetic field. Five proteins showed improvement in crystal quality evaluated by the resolution limit in X-ray diffraction experiments and the overall <i>B</i>-factor of the crystal. Our data support the idea that the reduced-gravity environment produced by a high magnetic field gradient can be used to obtain enhanced-quality protein crystals, aiding in the determination of their precise crystal structures

Improvement in Quality of Protein Crystals Grown in a High Magnetic Field Gradient

Space-based microgravity environments have been utilized to obtain a highly ordered crystal because of the lack of gravity-induced convection. A superconducting magnet-based quasi-microgravity is also expected to contribute to the enhancement of the quality of protein crystals. We here report a case study on protein crystallization using fifteen kinds of samples in a magnetic field gradient, which was sufficient for magnetic levitation of water droplets. In three cases, rod-type crystals were aligned perpendicular to the crystallization plate, exhibiting magnetic orientation parallel to the direction of the magnetic field. Five proteins showed improvement in crystal quality evaluated by the resolution limit in X-ray diffraction experiments and the overall <i>B</i>-factor of the crystal. Our data support the idea that the reduced-gravity environment produced by a high magnetic field gradient can be used to obtain enhanced-quality protein crystals, aiding in the determination of their precise crystal structures