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日光男体火山における約1万年前の火砕流堆積物の発見
No full textNantai Volcano is a symmetrical stratovolcano, situated in the southern part of the Northeast Japan arc. Many geologic studies hitherto have suggested that the stratovolcano was formed during the Main stage, and the overlying pyroclastic materials and a lava flow were formed in the Later stage. Because no sedimentary gap is found between any deposits of the Later stage, it is inferred that all of the activity in the Later stage took place successively around 12ky BP (15-14 cal ka BP) and went dormant until now. However, we found a pyroclastic flow deposit named Bentengawara Pyroclastic Flow Deposit (BPFD) at the northeastern flank of the Nantai volcano about 2km from the summit crater. This deposit overlies an 80cm thick deposit of weathered ashy sediments that in turn overlies the Arasawa Pumice Flow Deposit, a member of the Later stage. The lower half of the BPFD consists of volcanic lapilli and ash that is remarkably fine-depleted while the upper half contains abundant scoria of mainly lapilli-block sized clasts. The deposit also includes a small number of breadcrust blocks and occasional accessory lava blocks and fragments of charred wood. The breadcrust blocks consist of a dense outer crust that is significantly fractured and a vesiculated interior. It is noteworthy that the edges of the cracks are sharp and never rounded, suggesting that the vaporization of the inner magma that produced these cracks took place just before or immediately following the settlement of the blocks. Paleomagnetic data from three breadcrust block samples indicate that the magnetic vectors of high temperature components are aligned with our present-day poles. Two pieces of charred wood were measured for their 14C ages with results of 12-11 cal ka BP. The whole rock chemistry of scoria and breadcrust blocks are determined to be significantly different from any of the rocks of the Later stage, but the accessory block in the BPFD has the similar chemistry to the Osawa Lava, the last product of the Later stage. We therefore suggest that the BPFD was deposited after the Later stage with a short (～3ka) dormant period between them. Since the age is possibly around 10ka, the Nantai volcano should be counted as active volcano based on the definition provided by the Meteorological Agency of Japan.Article火山. 54(4): 163-173(2009)journal articl
運動の形態が気晴らしと自己効力感に及ぼす影響: 運動における認知的方略に着目して
No full text本研究は運動における認知的方略が気晴らしの要因になることに着目して，認知的方略の数が異なる個人と集団のウォーキングで気分や自己効力感にどのような変化を与えるか検討した。結果，認知的方略の数が多い集団と少ない個人によって，群間で気分・感情の変化に差は見られず，ストレッサーから注意をそらすだけの認知的方略があれば，認知的方略の数は気晴らしには影響がないことが示唆された。自己効力感では，群間で効果量に差が見られ，集団では，他者の存在が個人では見られない情報源となったと考えられる。競技的要素，技術・体力による差が少ない点からも，自己効力感向上には，集団でのウォーキングが効果的である可能性が示唆された。Article信州心理臨床紀要. 16:51-58(2017)departmental bulletin pape
Relativistic tight-binding approximation method for materials immersed in a uniform magnetic field: Application to crystalline silicon
No full textWe present a relativistic tight-binding (TB) approximation method that is applicable to actual crystalline materials immersed in a uniform magnetic field. The magnetic Bloch theorem is used to make the dimensions of the Hamiltonian matrix finite. In addition, by means of the perturbation theory, the magnetic hopping integral that appears in the Hamiltonian matrix is reasonably approximated as the relativistic hopping integral multiplied by the magnetic-field-dependent phase factor. In order to calculate the relativistic hopping integral, the relativistic version of the so-called Slater-Koster table is also given in an explicit form. We apply the present method to crystalline silicon immersed in a uniform magnetic field, and reveal its energy-band structure that is defined in the magnetic first Brillouin zone. It is found that the widths of energy-bands increase with increasing the magnetic field, which indicates the magnetic-field dependence of the appropriateness of the effective mass approximation. The recursive energy spectrum, which is the so-called butterfly diagram, can also be seen in the k-space plane perpendicular to the magnetic field.ArticlePHYSICAL REVIEW B. 91(7):075122 (2015)journal articl
Density of states estimation for soft core system
No full textThe density of states (DOSs) for the soft core system is calculated by the multicanonical molecular dynamics simulation. We found the DOS of this system has a concavity. Owing to this concavity, the probability distribution has double peaks near the temperature where the system undergoes the solid-fluid phase transition.ArticleMOLECULAR SIMULATION. 41(10-12):818-821 (2015)journal articl
Synthesis of 2-Azulenyl-1,1,4,4-tetracyano-3-ferrocenyl-1,3-butadienes by [2+2] Cycloaddition of (Ferrocenylethynyl)azulenes with Tetracyanoethylene
No full text1-, 2-, and 6-(Ferrocenylethynyl)azulene derivatives 1016 have been prepared by palladium-catalyzed alkynylation of ethynylferrocene with the corresponding haloazulenes under SonogashiraHagihara conditions. Compounds 1016 reacted with tetracyanoethylene (TCNE) in a [2+2] cycloadditioncycloreversion reaction to afford the corresponding 2-azulenyl-1,1,4,4,-tetracyano-3-ferrocenyl-1,3-butadiene chromophores 1723 in excellent yields. The redox behavior of the novel azulene chromophores 1723 was examined by using cyclic voltammetry (CV) and differential pulse voltammetry (DPV), which revealed their multistep electrochemical reduction properties. Moreover, a significant color change was observed by visible spectroscopy under electrochemical reduction conditions.ArticleCHEMISTRY-A EUROPEAN JOURNAL. 19(18):5721-5730 (2013)journal articl
Synthesis, Properties, and Redox Behavior of 1,1,4,4-Tetracyano-2-ferrocenyl-1,3-butadienes Connected by Aryl, Biaryl, and Teraryl Spacers
No full textAryl-substituted 1,1,4,4-tetracyano-1,3-butadienes (FcTCBDs) and bis(1,1,4,4-tetracyanobutadiene)s (bisFcTCBDs), possessing a ferrocenyl group on each terminal, were prepared by the reaction of a variety of alkynes with tetracyanoethylene (TCNE) in a [2+2] cycloaddition reaction, followed by retro-electrocyclization of the initially formed [2+2] cycloadducts (i.e., cyclobutene derivatives). The characteristic intramolecular charge transfer (ICT) between the donor (ferrocene) and acceptor (TCBD) moieties were investigated by using UV/ Vis spectroscopy. The redox behaviors of FcTCBDs and bis-FcTCBDs were examined by cyclic voltammetry (CV) and differential pulse voltammetry (DPV), which revealed their properties of multi-electron transfer depending on the number of ferrocene and TCBD moieties. Moreover, significant color changes were observed by visible spectroscopy under the electrochemical reduction conditions.ArticleCHEMISTRY-A EUROPEAN JOURNAL. 23(21):402-409 (2015)journal articl
Study on functional organogelators with electrochemical applications（電気化学的応用を有する機能性有機ゲル化剤に関する研究）
No full text信州大学(Shinshu university)博士（工学)ThesisWANG ZHONG. Study on functional organogelators with electrochemical applications（電気化学的応用を有する機能性有機ゲル化剤に関する研究）. 信州大学, 2018, 博士論文. 博士（工学), 甲第682号, 平成30年03月20日授与.doctoral thesi
Study on functional polymer microspheres for selective separation and release of halogen compounds（高分子微粒子によるハロゲン化合物の選択的分離と放出に関する研究)
No full text信州大学(Shinshu university)博士（工学)Thesis呉羽 拓真. Study on functional polymer microspheres for selective separation and release of halogen compounds（高分子微粒子によるハロゲン化合物の選択的分離と放出に関する研究). 信州大学, 2018, 博士論文. 博士（工学), 甲第683号, 平成30年03月20日授与.doctoral thesi
A study on multi-objective optimization and solution analysis directed to practical application（実応用を指向した多目的最適化と解の解析に関する研究）
No full text信州大学(Shinshu university)博士（工学)Thesis佐川 美也子. A study on multi-objective optimization and solution analysis directed to practical application（実応用を指向した多目的最適化と解の解析に関する研究）. 信州大学, 2018, 博士論文. 博士（工学), 甲第688号, 平成30年03月20日授与.doctoral thesi
エンベディッド・ライブラリーを目指して: 信大図書館の新たな学修支援サービスを中心に
No full textPresentation森 いづみ. "エンベディッド・ライブラリーを目指して: 信大図書館の新たな学修支援サービスを中心に". 第65回総会研究集会: 国立大学図書館協会ビジョン2020に基づく活動について-ビジョン採択から2年を迎えて-【重点領域② 知の創出】. 2018-6-15, 国立大学図書館協会. 2018, 27p.conference objec