著者
菊池 豊 藤井 資子 山本 正晃 永見 健一 中川 郁夫
出版者
一般社団法人情報処理学会
雑誌
情報処理学会研究報告. DSM, [分散システム/インターネット運用技術] (ISSN:09196072)
巻号頁・発行日
vol.46, pp.103-108, 2007-07-19
被引用文献数
1

われわれは,インターネットの通信遅延の実測値に基づき, ISPのネットワークトポロジを推定することを試みた.本研究では, ISPのネットワークトポロジのモデルを仮説として示し,複数ISPを利用して計測した遅延時間と利用可能な公開データに基づいて,仮説がどの程度妥当なものかの検証を行った.
著者
Shozo Tomonaga Mitsuhito Matsumoto Mitsuhiro Furuse
出版者
Japan Poultry Science Association
雑誌
The Journal of Poultry Science (ISSN:13467395)
巻号頁・発行日
vol.49, no.4, pp.308-312, 2012-10-25 (Released:2012-10-25)
参考文献数
22
被引用文献数
8 22

Carnosine and its methylated derivative anserine are dipeptides present in high levels in chicken muscles. They are antioxidants and putative neurotransmitters. If administration of β-alanine, one of the constituents of carnosine, could increase levels of these dipeptides in the brain and muscles, it may improve brain function and increase commercial values of the chicken meat. In the present study, we investigated whether orally administered β-alanine could increase these dipeptide levels in the brain, Musculus pectoralis superficialis, and plasma in broiler chicks. Broilers (2 days old) were given oral doses of β-alanine (0.176, 0.88, 4.4 and 22 mmol/kg) twice a day for 5 days. Carnosine levels were dose-dependently increased in the brain, Musculus pectoralis superficialis, and plasma while no influence of anserine was detected. These results suggest that supplemental β-alanine could be effective in increasing carnosine levels in the brain and muscle of broiler chicks.
著者
古野 博明
出版者
一般社団法人日本教育学会
雑誌
教育學研究 (ISSN:03873161)
巻号頁・発行日
vol.65, no.3, pp.214-222, 287, 1998-09-30

教育基本法の成立ということについて、通説は、当時の文相、田中耕太郎の発意と熱意からこれを説明している。が、彼の教育改革案には、もともと国民教育の倫理化と教育権独立の憲法的保障という二つの力点があった。教育目的の法規化に否定的なそのような構想から教育基本法の着想が自動的に生まれるかどうかは一つの問題であろう。ところで、教育基本法成立史の研究は、戦後教育改革資料の調査研究の飛躍的発展によって新しい段階に立ち至っており、田中(耕)に加えて、二人の人物に注目を要することが判明している。一人は、被占領期教育改革立法の立案を担っていた文部省の審議室参事事務取扱、田中二郎で、もう一人は、教育政策の策定に重大な影響力のあった、教育刷新委員会の副委員長、南原繁である。そこで、教育基本法の成立を説く鍵は、どの点に見いだしうるか。第一に、教育基本法立案の起点は、1946年9月11日の文部省省議にあった。教育基本法の構想は、事実上この会議において、法律専門家である田中二郎が発案したものである。教育刷新委員会第一特別委員会の審議過程や審議室・CI&E教育課の協議過程の原案になったのも、彼の1946年9月21日付教育基本法要綱案であった。教育基本法に異例の前文を付す構想も彼のアイデアである。田中(耕)文相は、こうした構想を支持しそれを国策として確定することに重要な役割を演じたのである。第二に重要なのは、南原繁もまた教育基本法の立案に少なからず影響を及ぼしていることである。教育及び文化の問題についての、8月27日の貴族院における彼の質問演説には注意を払うべきだろう。彼は田中(耕)文相の教育立法政策と教育権独立論を批判し、新憲法に教育の根本方針を規定するよう要求するとともに、教育の国民との直結性と政治教育の重要性を説いていた。さらに教育刷新委員会が教育基本法制定方針の大綱を採択したのは、第一特別委員会報告に対する南原の厳しい批判に負うところが大きい。その際、彼は教育の目的は人間性の開発ではなく、あくまで人格の完成でなければならないと力説し、倫理教育において宗教にまで飛躍することに反対した。このような彼の思想は、結果として教育基本法成文のいくつかの条項に生きたのである。今後は、こうした諸点を熟慮して、教育基本法の成立の歴史的意義と限界を読み取っていかなければならない。
著者
石田 武志
出版者
日本シミュレーション学会
雑誌
日本シミュレーション学会論文誌 (ISSN:18835031)
巻号頁・発行日
vol.4, no.2, pp.51-61, 2012 (Released:2012-11-23)
参考文献数
13

Renewable energy resources are generally unstable and affect the performance of electricity grids when they are fully connected. A distributed energy supply network system is expected to overcome the above problem. Such a system consists of a network system in which electricity and heat can be transferred between dispersion generators and the renewable energy resources and can supply stable energy to an urban district. We have constructed a self-organization model for the formation of dispersion energy network. We demonstrated that the following 2 functions can be realized by the multi-agent model which has rules for introduction of energy facilities (fuel cell cogeneration system (CGS), heat pump system (HP), photovoltaic (PV) systems and conventional system). 1) Energy exchange was achieved between neighbor houses and surplus energy was consumed in urban district. 2) “Energy colony” is formed for self-organizing.   Our simulation results indicated that stable energy exchange was possible when “Energy colony” was formed in the district. It is considered that it is possible to construct self-organization energy network in a real dynamic urban energy environment by applying the facility replacement rules determined in this study.
著者
Ishizuka Shogo Yamada Akimasa Islam Muhammad Monirul Shibata Hajime Fons Paul Sakurai Takeaki Akimoto Katsuhiro Niki Shigeru
出版者
American Institute of Physics
雑誌
Journal of applied physics (ISSN:00218979)
巻号頁・発行日
vol.106, no.3, pp.034908, 2009-08
被引用文献数
144 57

The systematic variations in the structural, optical, and electrical properties of polycrystalline Cu(In,Ga)Se2 (CIGS) thin films with Na doping level were investigated. Precise control of the Na concentration in CIGS films was demonstrated using alkali-silicate glass thin layers of various thicknesses deposited on substrates prior to CIGS growth. The CIGS grain size was observed to decrease with increasing Na concentration, although the surface morphology became smoother and exhibited a stronger (112) texture, which has been demonstrated consequence of larger grain size. The Ga composition gradient in the CIGS films was found to become large due to the presence of Na during growth, which in turn led to a decrease in the nominal band gap energy. Variations in the photoluminescence spectra and electrical properties suggested that the formation of an acceptor energy state, which may originate from OSe point defects, was enhanced in the presence of Na. This result suggests that not only Na, but also the presence of O in combination with Na contributes to the compensation of point defects and enhances p-type conductivity in CIGS films.
著者
Lee J. D. Gomi H. Hase Muneaki
出版者
American Institute of Physics
雑誌
Journal of applied physics (ISSN:00218979)
巻号頁・発行日
vol.106, no.8, pp.083501, 2009-10-16
被引用文献数
1 3

Using the nonperturbative many-body time-dependent approach, we investigate the nonequilibrium dynamics of the coherent longitudinal optical phonon-plasmon coupled (LOPC) modes in a polar semiconductor and explore their coherent optical control and eventually the carrier mobility of the semiconductor. The basic idea for a control of the carrier mobility is to manipulate the ultrafast dephasing of the coherent carrier-relevant LOPC mode. We theoretically propose two possible options to realize the idea and reach the final goal. One is to optimize a semiconductor by finely balancing two kinds of carrier densities by chemical doping and optical doping (or photodoping), where the relaxation of the coherent carrier-relevant LOPC mode would respond in a (weak) singular way. It is found that, in this way, the carrier mobility could be enhanced by a few tens of percent. The other is to optimize the optical pumping laser. In this option, the pulse train creating pure virtual carriers through the below-band-gap excitation would be incorporated for an optical pumping, which can make possible the dephasing-free dynamics of the coherent carrier-relevant LOPC mode. The carrier mobility can then be efficiently controlled and dramatically enhanced by synchronizing the pulse train with its coherent oscillation. This might imply one of ultimate ways to control the carrier mobility of the semiconductor
著者
Ide T Isozaki H Nakata S Siltanen S
出版者
Institute of Physics
雑誌
Inverse problems (ISSN:02665611)
巻号頁・発行日
vol.26, no.3, pp.035001, 2010-03
被引用文献数
12 12

Assume one is given a three-dimensional bounded domain with an unknown conductivity distribution inside. Further, suppose that the conductivity consists of a known background and unknown anomalous regions (inclusions) where conductivity values are unknown and different from the background. A method is introduced in Ide et al (2007 Commun. Pure Appl. Math. 60 1415–42) for locating inclusions approximately from noisy localized voltage-to-current measurements performed at the boundary of the body. The method is based on the use of complex geometrical optics solutions and hyperbolic geometry; numerical testing is presented in the aforementioned paper for the two-dimensional case. This work reports the results of computational implementation of the method in dimension three, where both the simulation of data and the computerized inversion algorithm are more complicated than in dimension two. Three new regularizing steps are added to the algorithm, resulting in significantly better robustness against noise. Numerical experiments are reported, suggesting that the approximate location of the inclusions can be reliably recovered from the data with a realistic level of measurement noise. Potential applications of the results include early diagnosis of breast cancer, underground contaminant detection and nondestructive testing.
著者
Kinoshita Setsuko Wagatsuma Yukiko Okada Masafumi
出版者
BioMed Central
雑誌
International journal of health geographics
巻号頁・発行日
vol.6, pp.34, 2007-07
被引用文献数
28 30

BackgroundMalignant neoplasm of the pancreas has become one of the leading causes of death from malignant neoplasm in Japan (the 5th in 2003). Although smoking is believed to be a risk factor, other risk factors remain unclear. Mortality from malignant neoplasm of the pancreas tends to be higher in northern Japan and in northern European countries. A recent study reported that standardized mortality ratios (SMRs) for malignant neoplasm of the pancreas were negatively correlated to global solar radiation level. People residing in regions with lower solar radiation and lower temperatures may be at higher risk of development of malignant neoplasm of the pancreas. Therefore, this study aimed to examine the relationship between SMRs for malignant neoplasm of the pancreas and climatic factors, such as the amount of global solar radiation and the daily maximum temperature in Japan.ResultsThe study used multiple linear regression models. Number of deaths and demographic data from 1998 to 2002 were used for the calculation of SMR. We employed mesh climatic data for Japan published in 2006 by the Japan Meteorological Agency. Regression coefficients for the amount of global solar radiation and the daily maximum temperature in males were -4.35 (p = 0.00034) and -2.81 (p < 0.0001) respectively, and those in females were -5.02 (p < 0.0001) and -1.87 (p < 0.0001) respectively. Increased amount of global solar radiation or daily maximum temperature was significantly related to the decreased SMRs for malignant neoplasm of the pancreas in both males and females.ConclusionThis study suggested that low solar radiation and low temperature might relate to the increasing risk of malignant neoplasm of the pancreas. Use of group data has a limitation in the case of evaluating environmental factors affecting health, since the impact of climatic factors on the human body varies according to individual lifestyles and occupations. Use of geographical mesh climatic data, however, proved useful as an index of risk or beneficial factors in a small study area. Further research using individual data is necessary to elucidate the relationship between climatic factors and the development of malignant neoplasm of the pancreas.
著者
Otani Minoru Takagi Yoshiteru Koshino Mikito Okada Susumu
出版者
American Institute of Physics
雑誌
Applied physics letters (ISSN:00036951)
巻号頁・発行日
vol.96, no.24, pp.242504, 2010-06
被引用文献数
25

Based on first-principle total-energy calculations, we have found that by applying an external electric field it is possible to control the magnetic state of graphite thin film with the rhombohedral stacking arrangement. When exposed to a moderate electric field normal to the film, the surface of a thin film of rhombohedral graphite undergoes a magnetic phase transition from the antiferromagnetic state to the ferromagnetic state. The polarized electron spin is primarily distributed in the bottommost layer of the film, which forms the interface with the negative electrode. The amount of polarized electron spin is calculated to be 0.067 μB/nm2. The ferromagnetic ordering with the characteristic distribution of the polarized electron spin opens the possibility of using graphite thin films in electronic devices with spin degree of freedom.
著者
増田 明美 塚本 康子
出版者
日本母性衛生学会
雑誌
母性衛生 (ISSN:03881512)
巻号頁・発行日
vol.47, no.4, pp.607-615, 2007-01
被引用文献数
2

本研究は,中学校の思春期(12〜15歳)に不登校を経験した者と経験のない者のセルフエスティームについて,思春期(15〜18歳),青年期(19〜22歳),成人前期(23〜30歳)の発達段階別に検証することを目的とした。調査方法としてRosenbergのSelf-esteem尺度の日本語版を使用し,通信制高校生15〜30歳の未婚者703人(男339人,女364人)を解析対象とした。不登校経験者317人(男133人,女184人),不登校経験のない者386人(男206人,女180人)のセルフエスティームを検証した結果,以下のことが明らかになった。1)女子は男子に比べると,セルフエスティームが有意に低かった。2)不登校経験者と非不登校経験者のセルフエスティームを比べると女子の不登校経験者のほうが有意に低かった。男子では差がなかった。3)不登校経験者と非不登校経験者のセルフエスティームを発達段階別にみると,思春期の女子には差はなかったが,青年期,成人前期の女子では不登校経験者のほうが有意に低かった。男子では差がなかった。
著者
小林 郁夫 土居 寿 高橋 正史 中野 毅 米山 隆之 浜中 人士
出版者
一般社団法人日本歯科理工学会
雑誌
歯科材料・器械 (ISSN:02865858)
巻号頁・発行日
vol.14, no.4, pp.406-413, 1995-07-25
被引用文献数
20

外科用インプラント材として知られているTi-6Al-7Nb合金の歯科領域での臨床応用をはかるため, この合金の試験片を歯科鋳造法によって作製し, その鋳造性ならびに鋳造体の力学的性質を評価した.その結果, マグネシア系埋没材と遠心鋳造機を使用したときにもっとも良好な鋳造体が得られた.また引張試験の結果, Ti-6Al-7Nb合金は0.2%耐力, 最大引張強さではTi-6Al-4V合金にやや劣るものの, 破断伸びでは勝っており, およそ1.4倍の伸びを示すことがみいだされた.このときのTi-6Al-7Nb合金の組織は, 旧β相粒内に針状α相が微細に析出した組織を呈しており, この微細な二相組織がこの合金の強さを支えているものと考察された.以上の結果から, Ti-6Al-7Nbを従来どおりの歯科鋳造法によって利用することができると結論した.
著者
矢野 宏
出版者
日経BP社
雑誌
日経ベンチャ- (ISSN:02896516)
巻号頁・発行日
no.246, pp.136-138, 2005-03

未明の火事で妻と3人の子供達、店舗までも失った五代目は、焼け跡で再起を誓う。再建資金を得て、半年後には建物も出来たが、和菓子職人としての勘が戻らない。