現代企業における所有の諸相に関する一考察 -所有の多様性と整理枠組としての所有の一般理論

departmental bulletin pape

Wi-Fi RTT を用いた位置特定手法の屋内環境での性能評価

本稿では Wi-Fi RTT (Round Trip Time)の測距，測位について実際の利用時を想定した性能評価を行っている．実験の結果，測距，測位のいずれにおいても，周波数帯，帯域幅，使用チャネル，チャネル使用量が性能に影響を与えることを示している．また，測距性能評価では，アクセスポイントの高さの設置基準，測位計算に利用するアクセスポイントの選択基準に関する知見を得ている．測距性能評価を踏まえた測位性能評価では，チャネル使用量と測位性能の関係を示し，チャネル選択の重要性に関する知見を得ている． In this paper, we evaluate the ranging and positioning performance considering the actual usage environments about Wi-Fi RTT (Round Trip Time). As the results, we show that frequency band, band width, channel, and channel status influence the ranging and positioning performance. Also, we obtain the knowledge about the installation height criteria of access points and the selection criterion of access points. In addition, we show the relationships between channel status and positioning performance. Consequently, we obtain the knowledge about the importance of the channel selection on Wi-Fi RTT.Copyright ©2020 by IEICEtextapplication/pdftechnical repor

A Research on Cooperative Problem Solving in Mathematics Education : Object of Evaluation and Practical Trails

departmental bulletin pape

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

journal articl

REALIZATION OF AUTOMORPHISMS sigma OF ORDER 3 AND G^{sigma} OF COMPACT EXCEPTIONAL LIE GROUPS G , II, G=E_{7}

application/pdfFor the simply connected compact exceptional Lie group E_{7} , we realize all of automorphisms sigma of order 3 and determine the group structures the fixed subgroups (E_{7})^{sigma} of E_{7}.departmental bulletin pape

Comparative Assessment of Human Health Risks from Rice Consumption in Thailand and Vietnam

Rice is the staple food of Southeast Asia, whose population consumes about 197 kg per capita per year.Heavy metals present in this rice are therefore a serious health matter. This study was conducted to i） monitor and compare the rice cultivated in both Thailand and Vietnam with respect to the heavy metals contained, and ii） assess any local human health risk from rice consumption. The results showed nonsignificant differences in heavy metal concentrations in different types of polished rice （jasmine,sticky,and white）. Similar samples of brown jasmine rice were found to have higher metal concentrations compared to other polished rice samples. By the CODEX standards, most rice samples collected from Thailand and Vietnam are generally safe for consumption on a daily basis. Human health risk assessment, however, reveals daily consumption of this rice might lead to negative health impacts from Zn toxicity （at hazard quotients > 1）; this held for all types of rice grains tested.othe

Wisdom in Adversity: A Twitter Study of the Japanese Tsunami

Sophisticated data science techniques have recently been applied to social networks data to study social phenomena and people. Recognizing that social psychology research has witnessed a renewed interest in the notion of wisdom, with an emphasis to its contextual dimensions, this study looks at the expression of wisdom in twitter messages. Specifically, it examines the relation between wisdom in adversity and cultural influences using Twitter data from the tragic Japanese tsunami of 2011. The study employs natural language processing and data science to detect the expression of wisdom. Two categories for wisdom in adversity are used: recognition of uncertainty and change, and cognitive empathy. Data processing is applied to 1,000 annotated tweets and extended to 43,436 tweets. The results show that it is viable to study wisdom in context using social networking sites data. This short paper discusses some of the findings.conference pape

Three-Dimensional Solution Structure of Oryzacystatin-I, a Cysteine Proteinase Inhibitor of the Rice, <i>Oryza sativa</i> L. japonica^†^,^‡

The three-dimensional structure of oryzacystatin-I, a cysteine proteinase inhibitor of the rice, Oryza sativa L. japonica, has been determined in solution at pH 6.8 and 25 °C by 1H and 15N NMR spectroscopy. The main body (Glu13−Asp97) of oryzacystatin-I is well-defined and consists of an α-helix and a five-stranded antiparallel β-sheet, while the N- and C-terminal regions (Ser2−Val12 and Ala98−Ala102) are less defined. The helix-sheet architechture of oryzacystatin-I is stabilized by a hydrophobic cluster formed between the α-helix and the β-sheet and is considerably similar to that of monellin, a sweet-tasting protein from an African berry, as well as those of the animal cystatins studied, e.g., chicken egg white cystatin and human stefins A and B (also referred to as human cystatins A and B). Detailed structural comparison indicates that oryzacystatin-I is more similar to chicken cystatin, which belongs to the type-2 animal cystatins, than to human stefins A and B, which belong to the type-1 animal cystatins, despite different loop length

ラット海馬へのイボテン酸投与および運動負荷ストレスにより出現するDark neuronとその経過

(運動・神経生理)journal articl

Structural and Functional Analyses of the Acidic and Basic Amino Acid Repeat Sequence (DDRK) in Pif 80 from Pinctada fucata on the Aragonite Crystal Surface Using NMR

Shellfish and crustaceans use calcium carbonate (CaCO3) as a protective shell and exoskeleton. CaCO3 is a major biomineral component in invertebrates. The Pinctada fucata shell contains two crystal polymorphs, with outer prismatic and inner nacreous layers. Diverse shell organic materials play significant roles in microstructure formation with organic–inorganic interactions. Pif 80 has a repeated acidic and basic amino acid low-complexity region that specifically binds to aragonite crystals. In this study, we aimed to elucidate the microstructure formation mechanism by analyzing the interaction between the low-complexity region and CaCO3. We used solution NMR to evaluate the structure and activity of the Pif 80 acidic region. We designed synthesis methods for aragonite nanoparticles that can be dispersed and rotated in solution. The results revealed that the “GDDRKDDRKG” peptide has the appropriate structure for aragonite surface binding, wherein the four carboxy groups of the Asp side chain are in the same plane, supported by Arg and Lys residues. The saturation transfer difference also supported this structure. These results suggest that the Pif 80 acidic region binds the aragonite crystal surface via Asp side chains with basic residues, providing new insights into the function of acidic and basic amino acids in biomineral formation