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Near-infrared polarimetry of the GG Tauri A binary system

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Research in Astronomy and Astrophysics 2014年第11期14卷 1438-1446页

作者： Yoichi Itoh Yumiko Oasa Tomoyuki Kudo Nobuhiko Kusakabe Jun Hashimoto lyu abe Wolfgang Brandner Timothy D.Brandt Joseph C.Carson Sebastian Egner Markus Feldt Carol A.Grady Olivier Guyon Yutaka Hayano Masahiko Hayashi Saeko S.Hayashi Thomas Henning Klaus W.Hodapp Miki Ishii Masanori Iye Markus Janson Ryo Kandori Gillian R.Knapp Masayuki Kuzuhara Jungmi Kwon Taro Matsuo Michael W.McElwain Shoken Miyama Jun-Ichi Morino Amaya Moro-Martin Tetsuo Nishimura Tae-Soo Pyo Eugene Serabyn Takuya Suenaga Hiroshi Suto Ryuji Suzuki Yasuhiro H.Takahashi Naruhisa Takato Hiroshi Terada Christian Thalmann Daigo Tomono Edwin L.Turner Makoto Watanabe John Wisniewski Toru Yamada Satoshi Mayama Thayne Currie Hideki Takami Tomonori Usuda Motohide Tamura Nishi-Harima Astronomical Observatory Center for AstronomyUniversity of Hyogo407-2NishigaichiSayoHyogo 679-5313Japan Faculty of Education Saitama University255 Shimo-OkuboSakuraSaitamaSaitama338-8570Japan Subaru Telescope National Astronomical Observatory of Japan650 North Ahoku PlaceHiloHI 96720USA National Astronomical Observatory of Japan 2-21-1OsawaMitakaTokyo181-8588Japan H.L.Dodge Department of Physics & Astronomy University of Oklahoma440 W Brooks St.NormanOK 73019USA Laboratoire Lagrange (UMR 7293) Universit de Nice-Sophia AntipolisCNRSObservatoire de la Cote d’Azur28 avenue Valrose06108 Nice Cedex 2France Max Planck Institute for Astronomy Knigstuhl 1769117 HeidelbergGermany Department of Astrophysical Science Princeton UniversityPeyton HallIvy LanePrincetonNJ 08544USA Department of Physics and Astronomy College of Charleston58 Coming St.CharlestonSC29424USA Subaru Telescope National Astronomical Observatory of Japan650 North A’ohoku PlaceHiloHI 96720USA Exoplanets and Stellar Astrophysics Laboratory Code 667Goddard Space Flight CenterGreenbeltMD 20771USA Eureka Scientific 2452 DelmerSuite 100Oakland CA 96002USA Goddard Center for Astrobiology GreenbeltMD 20771USA Institute for Astronomy University of Hawaii640 N.Aohoku PlaceHiloHI 96720USA Department of Earth and Planetary Sciences Tokyo Institute of TechnologyOokayamaMeguro-kuTokyo 152-8551Japan Department of Astronomy Kyoto UniversityKitashirakawa-Oiwake-choSakyo-kuKyotoKyoto 606-8502Japan Hiroshima University 1-3-2KagamiyamaHigashihiroshimaHiroshima 739-8511Japan Department of Astrophysics CAB-CSIC/INTA28850 Torrejón de ArdozMadridSpain Jet Propulsion Laboratory California Institute of TechnologyPasadenaCA91109USA Department of Astronomical Science The Graduate University for Advanced Studies2-21-1OsawaMitakaTokyo181-8588Japan Department of Astronomy The University of Tokyo7-3-1HongoBunkyo-kuTokyo113-0033Japan Astronomical Institute "Anton Pannekoek" University

A high angular resolution near-infrared image that shows the intensity of polarization for the GG Tau A binary system was obtained with the Subaru Telescope. The image shows a circumbinary disk scattering the light from the central binary. The azimuthal profile of the intensity of polarization for the circumbinary disk is roughly reproduced by a simple disk model with the Henyey-Greenstein phase function and the Rayleigh function, indicating there are small dust grains at the surface of the disk. Combined with a previous observation of the circumbinary disk, our image indicates that the gap structure in the circumbinary disk orbits counterclockwise, but material in the disk orbits clockwise. We propose that there is a shadow caused by material located between the central binary and the circumbinary disk. The separations and position angles of the stellar components of the binary in the past 20 yr are consistent with the binary orbit with a = 33.4 AU and e = 0.34.

关键词： stars individual （GG Tauri） -- stars pre-maln sequence - techniques high angular resolution

Expression levels of K_(ATP)channel subunits and morphological changes in the mouse liver after exposure to radiation

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World Journal of Experimental Medicine 2024年第2期14卷 103-113页

作者： Ming Zhou Tao-Sheng Li Hiroshi abe Hideo Akashi Ryoji Suzuki Yoshio Bando Department of Anatomy Akita University Graduate School of MedicineAkita 010-8543Japan Department of Stem Cell Biology Atomic Bomb Disease InstituteNagasaki UniversityNagasaki 852-8523Japan Sendai Old Age Refresh Station A Long-term Care Health FacilitySendai 981-1105Japan

BACKGROUND ATP sensitive K+(K_(ATP))channels are ubiquitously distributed in various of cells and tissues,including the liver.They play a role in the pathogenesis of myocardial and liver ischemia.AIM To evaluate the radiation-induced changes in the expression of K_(ATP)channel subunits in the mouse liver to understand the potential role of K_(ATP)channels in radiation injury.METHODS Adult C57BL/6 mice were randomly exposed toγ-rays at 0 Gy(control,n=2),0.2 Gy(n=6),1 Gy(n=6),or 5 Gy(n=6).The livers were removed 3 and 24 h after radiation exposure.Hematoxylin and eosin staining was used for morphological observation;immunohistochemical staining was applied to determine the expression of K_(ATP)channel subunits in the liver tissue.RESULTS Compared with the control group,the livers exposed to 0.2 Gyγ-ray showed an initial increase in the expression of Kir6.1 at 3 h,followed by recovery at 24 h after exposure.Exposure to a high dose of 5.0 Gy resulted in decreased expression of Kir6.1 and increased expression of SUR2B at 24 h.However,the expression of Kir6.2,SUR1,or SUR2A had no remarkable changes at 3 and 24 h after exposure to any of these doses.CONCLUSION The expression levels of Kir6.1 and SUR2B in mouse liver changed differently in response to different radiation doses,suggesting a potential role for them in radiation-induced liver injury.

关键词： Radiation exposure ATP-sensitive K^(+)channel Mouse Liver

Mitigation of Transients in Capacitor Coupled Substations Using Traditional RLC Filter Techniques

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Journal of Power and Energy Engineering 2024年第5期12卷 60-75页

作者： Sinqobile Wiseman Nene Bolanle Tolulope abe Agha Francis Nnachi Department of Electrical Engineering Tshwane University of Technology eMalahleni South Africa

This article presents an extensive examination and modeling of Capacitor Coupled Substations (CCS), noting some of their inherent constraints. The underlying implementation of a CCS is to supply electricity directly from high-voltage (HV) transmission lines to low-voltage (LV) consumers through coupling capacitors and is said to be cost-effective as compared to conventional distribution networks. However, the functionality of such substations is susceptible to various transient phenomena, including ferroresonance and overvoltage occurrences. To address these challenges, the study uses simulations to evaluate the effectiveness of conventional resistor-inductor-capacitor (RLC) filter in mitigating hazardous overvoltage resulting from transients. The proposed methodology entails using standard RLC filter to suppress transients and its associated overvoltage risks. Through a series of MATLAB/Simulink simulations, the research emphasizes the practical effectiveness of this technique. The study examines the impact of transients under varied operational scenarios, including no-load switching conditions, temporary short-circuits, and load on/off events. The primary aim of the article is to assess the viability of using an established technology to manage system instabilities upon the energization of a CCS under no-load circumstances or in case of a short-circuit fault occurring on the primary side of the CCS distribution transformer. The findings underscore the effectiveness of conventional RLC filters in suppressing transients induced by the CCS no-load switching.

关键词： Capacitor Coupled Substation System Modeling Ferroresonance RLC filters Power Electronics Transients Capacitor Voltage Transformers Transmission Lines

Enhancement of Visual Attention by Color Revealed Using Electroencephalography

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Open Journal of Therapy and Rehabilitation 2024年第1期12卷 1-9页

作者： Moemi Matsuo Takashi Higuchi Takuya Ishibashi Ayano Egashira Toranosuke abe Hiroya Miyabara Faculty of Rehabilitation Sciences Nishikyushu University Kanzaki Japan Department of Physical Therapy Osaka University of Human Sciences Settsu Japan

Attention constitutes a fundamental psychological feature guiding our mental effort toward specific objects, concurrent with processes such as memory, reasoning, and imagination. Visual attention, crucial for selecting surrounding information, often decreases in older adults and patients with cerebrovascular disorders. Effective methods to enhance attention are scarce. Here, we investigated whether color information influences visual attention and brain activity during task performance, utilizing EEG. We examined 13 healthy young adults (seven women and six men;mean age: 21.2 ± 0.58 years) using 19-electrode electroencephalograms to assess the impact of color information on visual attention. The Clinical Assessment for Attention cancellation test was conducted under the black, red, and blue color conditions. Wilcoxon’s signed-rank test was used to assess differences in task performance (task time and error) between conditions. Spearman’s rank correlation was utilized to examine the correlation in power levels between task performance and color conditions. Significant variations in total task errors were observed among color conditions. The black condition exhibited the highest error frequency (0.7 ± 0.9 times), followed by the red condition (0.5 ± 0.8 times), with the lowest error frequency occurring in the blue (0.2 ± 0.4 times) condition (black vs. red: P = 0.03;black vs. blue: P = 0.00;red vs. blue: P = 0.032). No time difference was observed. The black condition showed negative delta and high-gamma correlations in the central electrodes. The red condition revealed positive alpha and low-gamma correlations in the frontal and occipital areas. Although no correlations were observed in the blue condition, it enhanced attentional performance. Positive alpha and low-gamma waves might be crucial for spotting attentional errors in key areas. Our findings provide insights into the effects of color information on visual attention and potential neural correlates associated with attentional processes. In conclusion, our

关键词： Attention Higher Brain Function Electroencephalography Neuroimaging Rehabilitation

Electroencephalogram Signal Correlations between Default Mode Network and Attentional Functioning

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Journal of Behavioral and Brain Science 2024年第4期14卷 119-134页

作者： Moemi Matsuo Takashi Higuchi Toranosuke abe Takuya Ishibashi Ayano Egashira Rio Kamashita Faculty of Rehabilitation Sciences Nishi Kyushu University Kanzaki Japan Department of Physical Therapy Osaka University of Human Sciences Settsu Japan Research Center for Child Mental Development Chiba University Chiba Japan

Attentional issues may affect acquiring new information, task performance, and learning. Cortical network activities change during different functional brain states, including the default mode network (DMN) and attention network. We investigated the neural mechanisms underlying attentional functions and correlations between DMN connectivity and attentional function using the Trail-Making Test (TMT)-A and -B. Electroencephalography recordings were performed by placing 19 scalp electrodes per the 10 - 20 system. The mean power level was calculated for each rest and task condition. Non-parametric Spearman’s rank correlation was used to examine the correlation in power levels between the rest and TMT conditions. The most significant correlations during TMT-A were observed in the high gamma wave, followed by theta and beta waves, indicating that most correlations were in the parietal lobe, followed by the frontal, central, and temporal lobes. The most significant correlations during TMT-B were observed in the beta wave, followed by the high and low gamma waves, indicating that most correlations were in the temporal lobe, followed by the parietal, frontal, and central lobes. Frontoparietal beta and gamma waves in the DMN may represent attentional functions.

关键词： Cortical Network Activities Electroencephalography Attention Default Mode Network

Characterization of Aquifers in Crystalline and Crystallophyll Basement Zones Using the Electrical Resistivity Method (Trails and Electrical Soundings) in the Gagnoa Region, (Central-Western Côte d’Ivoire)

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International Journal of Geosciences 2024年第6期15卷 511-523页

作者： Oscar Zahibo Onétié Assoué Kouakou Sylvestre Kouadio Kotchi Rodrigue Orou Maxime Assa abe Department of Geosciences Peleforo Gon Coulibaly University Korhogo Cte dIvoire Department of Agriculture and New Technologies University of San Pedro San Pedro Cte dIvoire

Introduction: Located in the central-western part of Côte d’Ivoire, the subsoil of the Gagnoa region is made up of sedimentary volcano formations and granitoids with developed fracturing. This complex Precambrian basement contains most of the region’s water resources. This is at the origin of the high failure rate during the various hydrogeological prospecting campaigns. Methodology: The database consists of resistivities from 42 holes and 51 trails drilled as part of the implementation of high-throughput drilling in the study area. The objective of this study is to deepen the knowledge of the fissured basement by interpreting profile curves and electrical soundings. It will be a question of classifying the different types of anomalies obtained on the profiles and their shapes. The orientation of the lineaments observed on the profiles was determined. Results: The interpretation of the geophysical data revealed various anomalies, the main ones being of the CC (Conductor Compartment) and CEDP (Contact between two bearings) types. These types of anomalies are mainly expressed in various forms: the “V”, “W” and “U” shapes. From these anomalies and the appearance of the electrical profiles, lineaments and their orientations were identified with N90-100, N130-140, N170-180 as major orientations. Conclusion: These results could contribute to a better understanding of the fractured environment of the Gagnoa region.

关键词： Basement Electrical Profiles Sounding Curves Resistivities

An interactive approach to investigate brightness perception of daylighting in Immersive Virtual Environments:Comparing subjective responses and quantitative metrics

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Building Simulation 2022年第1期15卷 41-68页

作者： Muhammad Hegazy Kensuke Yasufuku Hirokazu abe Graduate School of Engineering Osaka UniversityYamadaoka 2-1 Suita Osaka567-0047Japan Cybermedia Center Osaka UniversityJapan

Daylighting plays an eminent role in the performance of indoor environments and their occupants,thus necessitating the need to investigate daylight perception of potential occupants at early design stages.The present study introduces an interactive approach to collect and visualize brightness perception of daylighting in a large-scale immersive virtual environment using a game engine as a daylight simulation tool.The developed system allows users to explore building models freely at different day times set in virtual reality and report their perceptions in real time.Following a validation study(N=36)to investigate the consistency of brightness perceptions in a real environment and its virtual replica,a set of 24 participants were recruited to use the system to report their brightness perception in a virtual model of a daylit art museum,through snapshotting the scenes where they perceive as one of the following in terms of daylighting:(very dark,dark,bright,or very bright).Using an output of 419 snapshots,a"Perceptual Light Map"(PLM)was developed to visualize the collective brightness perception of participants as a heat map.Subjective responses were found to be positively correlated with four daylight metrics,with the highest correlation to mean luminance and the lowest to luminance ratio.The findings of this exploratory study represent a step towards a user-oriented supplement tool to the existing quantitative daylight metrics,validating game engines’adequacy as a daylight simulation tool,and illustrating the potentials of immersion and interaction principles for the perception of daylit spaces in virtual reality.

关键词： immersive virtual environment daylighting game engine human perception mean luminance

Current overview on the genetic basis of key genes involved in soybean domestication

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aBIOTECH 2022年第2期3卷 126-139页

作者： Sijia Lu Chao Fang Jun abe Fanjiang Kong Baohui Liu Innovative Center of Molecular Genetics and Evolution School of Life SciencesGuangzhou UniversityGuangzhou 510006China Guangzhou Key Laboratory of Crop Gene Editing Guangzhou UniversityGuangzhou 510006China Research Faculty of Agriculture Hokkaido UniversitySapporoHokkaido 060-0808Japan

Modern crops were created through the domestication and genetic introgression of wild relatives and adaptive differentiation in new environments.Identifying the domestication-related genes and unveiling their molecular diversity provide clues for understanding how the domesticated variants were selected by ancient people,elucidating how and where these crops were domesticated.Molecular genetics and genomics have explored some domestication-related genes in soybean(Glycine max).Here,we summarize recent studies about the quantitative trait locus(QTL)and genes involved in the domestication traits,introduce the functions of these genes,clarify which alleles of domesticated genes were selected during domestication.A deeper understanding of soybean domestication could help to break the bottleneck of modern breeding by highlighting unused genetic diversity not selected in the original domestication process,as well as highlighting promising new avenues for the identification and research of important agronomic traits among different crop species.

关键词： Soybean Domestication Diversity Gene

Dilute long period stacking/order(LPSO)-variant phases along the composition gradient in a Mg-Ho-Cu alloy

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Journal of Magnesium and Alloys 2022年第6期10卷 1573-1580页

作者： Kai Guan Daisuke Egusa Eiji abe Department of Materials Science and Engineering The University of TokyoTokyo 113-8656Japan Research Center for Structural Materials National Institute for Materials ScienceTsukuba 305-0047Japan

We have systematically investigated the microstructures of as-cast Mg_(97.49)Ho_(1.99)Cu_(0.43)Zr_(0.09)alloy by atomic resolution high-angle annular dark field scanning transmission electron microscopy(HAADF-STEM), revealing the coexistence of 18R, 14H and 24R long period stacking/order(LPSO) phases with fully coherent interfaces along step-like composition gradient in a blocky intermetallic compound distributed at grain boundary. The short-range order(SRO) L1_(2)-type Cu_(6)Ho_(8)clusters embedded across AB’C’A-stacking fault layers are directly revealed at atomic scale. Importantly, the order degree of SRO clusters in the present dilute alloy is significant lower than previous 6M and 7M in-plane order reported in ternary Mg-TM(transition metal)-RE(rare earth) alloys, which can be well matched by 9M in-plane order. This directly demonstrates that SRO in-plane L1_(2)-type clusters can be expanded into more dilute composition regions bounded along the definite TM/RE ratio of 3/4. In addition, the estimated chemical compositions of solute enriched stacking fault(SESF) in all LPSO variants are almost identical with the ideal SESF composition of 9M in-plane order, regardless of the type of LPSO phases. The results further support the viewpoint that robust L1_(2)-type TM_(6)RE_(8)clusters play an important role in governing LPSO phase formation.

关键词： Magnesium alloys Long period stacking/order(LPSO)phases Short-range order(SRO)clusters High-angle annular dark field scanning transmission electron microscopy(HAADF-STEM)