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Rapid Electronic Transport Channel of Co-P with Mo in a Heterostructure Embedded with P, N Dual Doped Porous Carbon for Electrocatalytic Oxygen and Hydrogen Evolution

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ChemNanoMat 2024年第7期10卷

作者： Dey, Tapan Rajput, Anubha Jhaa, Gaurav Matsagar, Babasahab M. Chen, Norman C.-R Kumar, Nitish Salunkhe, Rahul Wu, Kevin C.-W. Chakraborty, Biswarup Dutta, Saikat Electrochemical Energy & Sensor Research Laboratory Amity Institute of Click Chemistry Research & Studies Amity University Noida India Department of Chemistry Indian Institute of Technology Delhi Hauz Khas New Delhi110016 India Chemical Information Sciences Laboratory Department of Chemistry Pondicherry University Kalapet Pondicherry605014 India Department of Chemical Engineering National Taiwan University No. 1 Sec. 4 Roosevelt Road Taipei10617 Taiwan Molecular Science and Technology Program Taiwan International Graduate Program Academia Sinica Taiwan Materials Research Laboratory Department of Physics Indian Institute of Technology Jammu Jammu India Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan Chung-Li Taiwan Department of Chemical Engineering Chung Yuan Christian University No. 200 Zhongbei Rd. Zhongli Dist. Taoyuan City320 Taiwan

We developed a molybdenum (Mo)-doped cobalt (Co)-heterostructure embedded on a phosphorous (P) and nitrogen (N) dual-doped porous carbon which exhibits an intrinsic electronic transport channel of Co to Mo and P. The P,Mo,O−Co/PNC/NF (NF=Nickel foam) electrode offers 335 mV overpotential at 10 mA cm−2 in OER as compared with PMA-ZIF67-NC/NF and ZIF67-NC/NF electrode with an overpotential of 357 and 373 mV respectively. Linear sweep voltammetry (LSV) of overall water splitting (OWS) supports that the current density gradually increased at a cell potential of 1.6 V with a maximum of 40 mA with a corresponding cell potential of 1.79 V at a current density of 10 mA cm−2. Density functional theory (DFT) calculations for water adsorption on optimized [111] surface of Co, CoMo, and CoMoP2 with adsorbed H2O and corresponding lattice determine the electron density difference of [111] surface with adsorbed H2O for Eads (eV) 4.23 corresponds to adsorption energy for CoMoP2. XANE-EXAFS spectroscopy of P,Mo,O−Co/PNC at Co K edge and Mo K edge suggests the presence of higher valence of both Cox+ and Mox+ without metallic Co and Mo and Co−P and Mo−P bonds as major structural units due to phosphidation as determined by R-space FT-EXAFS spectra. © 2024 Wiley-VCH GmbH.

关键词： Cobalt

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The ALMA-QUARKS Survey.Ⅱ.The ACA 1.3 mm Continuum Source Catalog and the Assembly of Dense Gas in Massive Star-Forming Clumps

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Research in Astronomy and Astrophysics 2024年第6期24卷 119-139页

作者：许峰玮 Ke Wang Tie Liu Lei Zhu Guido Garay Xunchuan Liu Paul Goldsmith Qizhou Zhang Patricio Sanhueza Shengli Qin Jinhua He Mika Juvela Anandmayee Tej Hongli Liu Shanghuo Li Kaho Morii Siju Zhang Jianwen Zhou Amelia Stutz Neal JEvans Kee-Tae Kim Shengyuan Liu Diego Mardones Guangxing Li Leonardo Bronfman Ken’ichi Tatematsu Chang Won Lee Xing Lu Xiaofeng Mai Sihan Jiao James O.Chibueze Keyun Su Viktor L.Tóth Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China Department of Astronomy School of PhysicsPeking UniversityBeijing 100871China Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China Chinese Academy of Sciences South America Center for Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Departamento de Astronomía Universidad de ChileLas Condes7591245 SantiagoChile Jet Propulsion Laboratory California Institute of Technology4800 Oak Grove DrivePasadena CA 91109USA Center for Astrophysics|Harvard&Smithsonian 60 Garden StreetCambridgeMA 02138USA National Astronomical Observatory of Japan National Institutes of Natural Sciences2-21-1 OsawaMitakaTokyo 181-8588Japan Astronomical Science Program The Graduate University for Advanced StudiesSOKENDAI2-21-1 OsawaMitakaTokyo 181-8588Japan School of Physics and Astronomy Yunnan UniversityKunming 650091China Yunnan Observatories Chinese Academy of SciencesKunming 650216China Department of Physics University of HelsinkiPO Box 64FI-00014 HelsinkiFinland Indian Institute of Space Science and Technology Thiruvananthapuram 695547KeralaIndia Max Planck Institute for Astronomy Königstuhl 17D-69117 HeidelbergGermany Department of Astronomy Graduate School of ScienceThe University of Tokyo7-3-1 HongoBunkyo-kuTokyo 113-0033Japan Max-Planck-Institut für Radioastronomie Auf dem Hügel 6953121 BonnGermany Departamento de AstronomÂıa Universidad de ConcepcionCasilla 160-CConcepci onChile Department of Astronomy The University of Texas at AustinTexas 78712-1205USA Korea Astronomy and Space Science Institute 776 Daedeokdae-roYuseong-guDaejeon 34055Republic of Korea Institute of Astronomy and Astrophysics Academia SinicaRoosevelt RoadTaipei 10617TaiwanChina South-Western Institute for Astronomy Research Yunnan UniversityKunming 650091China Korea Astronomy and Space Science Institute 776 Daedeok-daeroYuseong-guDaejeon 34055Republic of

Leveraging the high resolution,sensitivity,and wide frequency coverage of the Atacama Large Millimeter/submillimeter Array(ALMA),the QUARKS survey,standing for“Querying Underlying mechanisms of massive star formation with ALMA-Resolved gas Kinematics and Structures”,is observing 139 massive starforming clumps at ALMA Band 6(λ~1.3 mm).This paper introduces the Atacama Compact Array(ACA)7 m data of the QUARKS survey,describing the ACA observations and data *** multiwavelength data,we provide the first edition of QUARKS atlas,offering insights into the multiscale and multiphase interstellar medium in high-mass star *** ACA 1.3 mm catalog includes 207 continuum sources that are called ACA *** gas kinetic temperatures are estimated using three formaldehyde transitions with a non-LTE radiation transfer model,and the mass and density are derived from a dust emission *** ACA sources are massive(16–84 percentile values of 6–160 M_(⊙)),gravity-dominated(M∝R^(1.1))fragments within massive clumps,with supersonic turbulence(M>1)and embedded star-forming *** find a linear correlation between the masses of the fragments and the massive clumps,with a ratio of 6%between the *** considering fragments as representative of dense gas,the ratio indicates a dense gas fraction(DGF)of 6%,although with a wide scatter ranging from 1%to 10%.If we consider the QUARKS massive clumps to be what is observed at various scales,then the size-independent DGF indicates a self-similar fragmentation or collapsing mode in protocluster *** the ACA data over four orders of magnitude of luminosity-to-mass ratio(L/M),we find that the DGF increases significantly with L/M,which indicates clump evolutionary *** observed a limited fragmentation at the subclump scale,which can be explained by a dynamic global collapse process.

关键词： stars:formation ISM:kinematics and dynamics ISM:clouds stars:protostars

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The Japanese Vision for the Black Hole Explorer Mission

arXiv

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arXiv 2024年

作者： Akiyama, Kazunori Niinuma, Kotaro Hada, Kazuhiro Doi, Akihiro Hagiwara, Yoshiaki Higuchi, Aya E. Honma, Mareki Kawashima, Tomohisa Kolev, Dimitar Koyama, Shoko Masui, Sho Ohsuga, Ken Sano, Hidetoshi Takami, Hideki Tsunetoe, Yuh Uzawa, Yoshinori Akahori, Takuya Akiyama, Yuto Galison, Peter Hayashi, Takayuki J. Hirota, Tomoya Inoue, Makoto Iwata, Yuhei Johnson, Michael D. Kino, Motoki Kofuji, Yutaro Mizuno, Yosuke Moriyama, Kotaro Nagai, Hiroshi Nakamura, Kenta Notsu, Shota Ono, Fumie Oya, Yoko Oyama, Tomoaki Rana, Hannah Saida, Hiromi Saito, Ryo Saito, Yoshihiko Sasada, Mahito Sawada-Satoh, Satoko Takahashi, Mikiya M. Takamura, Mieko Tong, Edward Tsuji, Hiroyuki Yoshioka, Shogo Watanabe, Yoshimasa Massachusetts Institute of Technology Haystack Observatory WestfordMA01886 United States Mizusawa VLBI Observatory National Astronomical Observatory of Japan Iwate023-0861 Japan Black Hole Initiative Harvard University CambridgeMA02138 United States Graduate School of Sciences and Technology for Innovation Yamaguchi University Yamaguchi753-8512 Japan The Graduate School of Science Nagoya City University Aichi467-0001 Japan Institute of Space and Astronautical Science Japan Aerospace Exploration Agency Kanagawa252-5210 Japan Department of Space and Astronautical Science The Graduate University for Advanced Studies SOKENDAI Kanagawa229-8510 Japan Natural Science Laboratory Toyo University Tokyo112-8606 Japan Division of Science School of Science and Engineering Tokyo Denki University Saitama350-0394 Japan Department of Astronomy Graduate School of Science The University of Tokyo Tokyo113-0033 Japan Institute for Cosmic Ray Research The University of Tokyo Chiba277-8582 Japan Space Communication Systems Laboratory Wireless Networks Research Center National Institute of Information and Communications Technology Tokyo184-8795 Japan Graduate School of Science and Technology Niigata University Niigata950-2181 Japan Advanced Technology Center National Astronomical Observatory of Japan Tokyo181-8588 Japan Center for Computational Sciences University of Tsukuba Ibaraki305-8577 Japan Faculty of Engineering Gifu University Gifu501-1193 Japan Harvard University CambridgeMA02138 United States Azabu Junior and Senior High School Tokyo106-0046 Japan Astronomical Science Program The Graduate University for Advanced Studies SOKENDAI Tokyo181-8588 Japan Institute of Astronomy and Astrophysics Academia Sinica Taipei10617 Taiwan Center for Astrophysics Harvard & Smithsonian CambridgeMA02138 United States Kogakuin University of Technology & Engineering Academic Support Center 2665-1 Nakano Hachioji Tokyo192-0015 Japan Tsung-Dao Lee Institut

The Black Hole Explorer (BHEX) is a next-generation space very long baseline interferometry (VLBI) mission concept that will extend the ground-based millimeter/submillimeter arrays into space. The mission, closely aligned with the science priorities of the Japanese VLBI community, involves an active engagement of this community in the development of the mission, resulting in the formation of the Black Hole Explorer Japan Consortium. Here we present the current Japanese vision for the mission, ranging from scientific objectives to instrumentation. The Consortium anticipates a wide range of scientific investigations, from diverse black hole physics and astrophysics studied through the primary VLBI mode, to the molecular universe explored via a potential single-dish observation mode in the previously unexplored 50-70 GHz band that would make BHEX the highest-sensitivity explorer ever of molecular oxygen. A potential major contribution for the onboard instrument involves supplying essential elements for its high-sensitivity dual-band receiving system, which includes a broadband 300 GHz SIS mixer and a space-certified multi-stage 4.5K cryocooler akin to those used in the Hitomi and XRISM satellites by the Japan Aerospace Exploration Agency. Additionally, the Consortium explores enhancing and supporting BHEX operations through the use of millimeter/submillimeter facilities developed by the National Astronomical Observatory of Japan, coupled with a network of laser communication stations operated by the National Institute of Information and Communication technology. Copyright © 2024, The Authors. All rights reserved.

关键词： Radio astronomy

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Study on primary energy reduction effect by installing home-use fuel cell cogeneration system

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Journal of Environmental Engineering (Japan) 2019年第761期84卷 687-697页

作者： Arinami, Yuki Sakaguchi, Jun Akabayashi, Shin-Ichi Architecture Program Faculty of Eng Niigata University Japan Faculty of International Studies and Regional Development Dept. of International Studies and Regional Development University of Niigata Prefecture Japan Graduate School of Science and Technology Niigata University Japan

In this paper, numerical simulation is conducted when total 5.3 million units of SOFC and PEFC are operated nationwide, for power generation configuration and electricity supply amount of general electric utilities before and after the Great East Japan Earthquake. Calculate the annual primary energy reduction amount when a large number of fuel cells are installed and operated. Evaluation of introduction effect of home-use FCCGS as distributed power supply is performed. © 2019 Architectural Institute of Japan. All rights reserved.

关键词： Electric utilities

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Optical Variability of Blazars in the Tomo-e Gozen Northern Sky Transient Survey

arXiv

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arXiv 2024年

作者： Zhang, TianFang Doi, Mamoru Kokubo, Mitsuru Sako, Shigeyuki Ohsawa, Ryou Tominaga, Nozomu Tanaka, Masaomi Fukazawa, Yasushi Takahashi, Hidenori Arima, Noriaki Kobayashi, Naoto Arimatsu, Ko Okumura, Shin-Ichiro Kondo, Sohei Kasuga, Toshihiro Mori, Yuki Niino, Yuu Department of Astronomy Graduate School of Science The University of Tokyo 7-3-1 Hongō Bunkyo City Tokyo113-8654 Japan Institute of Astronomy Graduate School of Science The University of Tokyo 2-21-1 Osawa Mitaka Tokyo181-0015 Japan National Astronomical Observatory of Japan National Institutes of Natural Science 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Research Center for the Early Universe School of Science The University of Tokyo Bldg. No.4 7-3-1 Hongō Bunkyo City Tokyo113-0033 Japan UTokyo Organization for Planetary Space Science The University of Tokyo 7-3-1 Hongō Bunkyo City Tokyo113-8654 Japan Collaborative Research Organization for Space Science and Technology The University of Tokyo 7-3-1 Hongō Bunkyo City Tokyo113-8654 Japan Astronomical Science Program Graduate Institute for Advanced Studies SOKENDAI 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Department of Physics Faculty of Science and Engineering Konan University 8-9-1 Okamoto Hyogo Kobe658-8501 Japan Astronomical Institute Tohoku University Aoba Sendai980-8578 Japan Division for the Establishment of Frontier Sciences Organization for Advanced Studies Tohoku University Sendai980-8577 Japan Department of Physics Hiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima739-8526 Japan Kiso Observatory Institute of Astronomy Graduate School of Science The University of Tokyo Mitake 10762-30 Kiso-machi Kiso-gun Nagano397-0101 Japan Hakubi Center Astronomical Observatory Graduate School of Science Kyoto University Kitashirakawa-Oiwakecho Sakyo-ku Kyoto606-8502 Japan Japan Spaceguard Association Bisei Spaceguard Center 1716-3 Okura Bisei Ibara Okayama714-1411 Japan

We studied the optical variability of 241 BL Lacs and 83 flat-spectrum radio quasars (FSRQ) from the 4LAC catalog using data from the Tomo-e Gozen Northern Sky Transient Survey, with ∼ 50 epochs per blazar on average. We excluded blazars whose optical variability may be underestimated due to the influence of their host galaxy, based on their optical luminosity (LO). FSRQs with γ-ray photon index greater than 2.6 exhibit very low optical variability, and their distribution of standard deviation of repeated photometry is significantly different from that of the other FSRQs (KS test P value equal to 5 × 10−6 ). Among a sample of blazars at any particular cosmological epoch, those with lower γ-ray luminosity (Lγ) tend to have lower optical variability, and those FSRQs with γ-ray photon index greater than 2.6 tend to have low Lγ. We also measured the structure function of optical variability and found that the amplitude of the structure function for FSRQs is higher than previously measured and higher than that of BL Lacs at multiple time lags. Additionally, the amplitude of the structure function of FSRQs with high γ-ray photon index is significantly lower than that of FSRQs with low γ-ray photon index. The structure function of FSRQs of high γ-ray photon index shows a characteristic timescale of more than 10 days, which may be the variability timescale of the accretion disk. In summary, we infer that the optical component of FSRQs with high γ-ray photon index may be dominated by the accretion disk. © 2024, CC BY.

关键词： Gamma rays

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Decreased incidence followed by comeback of pediatric infections during the COVID‑19 pandemic in Japan

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World Journal of Pediatrics 2022年第8期18卷 564-567页

作者： Cyrus Ghaznavi Haruka Sakamoto Takayuki Kawashima Sayaka Horiuchi Masahiro Ishikane Sarah Krull Abe Daisuke Yoneoka Akifumi Eguchi Yuta Tanoue Masahiro Hashizume Shuhei Nomura Department of Health Policy and Management School of MedicineKeio University35 ShinanomachiShinjuku-kuTokyo 160-8582Japan Medical Education Program Washington University School of Medicine in St.LouisSaint LouisUSA Department of Global Health Policy Graduate School of MedicineThe University of TokyoTokyoJapan Tokyo Foundation for Policy Research TokyoJapan Department of Hygiene and Public Health Tokyo Women’s Medical UniversityTokyoJapan Department of Mathematical and Computing Science Tokyo Institute of TechnologyTokyoJapan Center for Birth Cohort Studies University of YamanashiYamanashiJapan Disease Control and Prevention Center National Center for Global Health and MedicineTokyoJapan Division of Prevention National Cancer Center Institute for Cancer ControlTokyoJapan Infectious Disease Surveillance Center National Institute of Infectious DiseasesTokyoJapan Department of Sustainable Health Science Center for Preventive Medical SciencesChiba UniversityChibaJapan Institute for Business and Finance Waseda UniversityTokyoJapan

During the coronavirus disease 2019(COVID-19)pandemic,the Japanese government implemented several infection control measures,such as states of emergency(SoE)and school closures,and encouraged universal masking and hand *** activity restrictions and improved hygiene were found to be associated with declines in the incidence of infuenza during the 2019–2020 winter season[1].Prior studies have found that the incidence of seven pediatric infections,such as pharyngoconjunctivitis and varicella,decreased during and after the school closures in Japan[2].As activity restrictions continue to be lifted,there is growing concern that pediatric infections may suddenly return given that the pool of susceptible children increased during the pandemic[3].In this study,we use national infectious disease sentinel data from January 2012 to October 2021 to assess changes in the reported number of pediatric infections in Japan during the COVID-19 *** hypothesize that the reporting of many infectious diseases decreased during the early stages of the pandemic but ultimately returned to normal when activity restrictions were lifted.

关键词： closure return suddenly

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Toxic Trace Elements Bound to Size-Fractioned Ambient Particles Down to Nanoparticles (Pm0.1): Characteristics, Sources and Health Risk Assessment

SSRN

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SSRN 2024年

作者： Jamhari, Anas Ahmad Rajab, Nor Fadilah Latif, Mohd Talib Wahab, Muhammad Ikram Abdul Othman, Murnira Mohd Nadzir, Mohd Shahrul Tekasakul, Perapong Hata, Mitsuhiko Furuchi, Masami School of biomedicine Faculty of Health Sciences Universiti Sultan Zainal Abidin Gong Badak Campus Terengganu Kuala Nerus21300 Malaysia Department of Earth Sciences and Environment Faculty of Science and Technology Universiti Kebangsaan Malaysia Selangor Bangi43600 Malaysia Environmental Health and Industry Safety Program Center for Toxicology and Health Risk Studies Faculty of Health Sciences Universiti Kebangsaan Malaysia Kuala Lumpur50300 Malaysia Universiti Kebangsaan Malaysia Selangor Bangi43600 Malaysia Faculty of Environmental Management Prince of Songkla University Songkhla Hat Yai90112 Thailand Graduate School of Natural Science and Technology Kanazawa University Ishikawa Kanazawa920-1192 Japan Faculty of Health Sciences Universiti Kebangsaan Malaysia Kuala Lumpur Malaysia

This study aimed to characterize the ambient nanoparticles, or PM0.1 and trace elements concentration, temporal and size distributions, potential sources, respiratory deposition and health risk assessment in an urban area of Kuala Lumpur, Malaysia, from February 2017 until 27 November 2017. The 120-h aerosol samples were collected using a Nanosampler and quantified via Inductively Couple Plasma Mass Spectrometry. The obtained findings demonstrated trace elements in aerosol dominated by Al, Fe and Mg represented 36.1%, 20.1% and 37.2% and followed by Cr and Zn with 1.6% and 2.1% from total trace elements concentration, respectively. Trace elements concentration accumulated in fine particles in order of PM1.0-2.5 > PM2.5-10 > PM0.1-0.5 > PM0.5-1.0 > PM PM>10 and varied in the order of Intermonsoon1 > Southwest > Northeast > Intermonsoon2. Enrichment factors revealed high anthropogenic Bi, Ag and Cd sources in size-fractionated particles. Principal component analysis (PCA) determined that the trace element contributions may have originated mainly from both natural and anthropogenic sources, i.e. vehicle emissions, industries and crustal elements. The largest deposition variability (78.9%) was usually observed in the respiratory system's upper airways, with the biggest contributions (38.9%) accumulated mostly in larger particles (PM2.5-10). In contrast, the greatest deposition of finer or ultrafine particles (22.1%-28.8%) in the deepest respiratory tract (alveolar). Cr and Zn deposited in all regions of the human respiratory system, providing a considerable risk to human health. Hazard index and hazard quotient value suggest that children may face greater health risks from exposure to trace elements from environmental particles than adults in all pathways. Conversely, the incremental lifetime cancer risks (ILCR) exhibited risk of adults was higher than the children group. Nevertheless, non-carcinogenic and carcinogenic health risk showed that the values for adult and ch

关键词： Aerosols

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The effects of surface fossil magnetic fields on massive star evolution: V. Models at low metallicity

arXiv

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arXiv 2024年

作者： Keszthelyi, Z. Puls, J. Chiaki, G. Nagakura, H. Ud-Doula, A. Takiwaki, T. Tominaga, N. Center for Computational Astrophysics Division of Science National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo181-8588 Japan LMU München Universitätssternwarte Scheinerstr. 1 München81679 Germany National Institute of Technology Kochi College 200-1 Monobe Kochi Nankoku783-8508 Japan Penn State Scranton 120 Ridge View Drive DunmorePA18512 United States Astronomical Science Program Graduate Institute for Advanced Studies SOKENDAI 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Department of Physics Faculty of Science and Engineering Konan University 8-9-1 Okamoto Hyogo Kobe658-8501 Japan

At metallicities lower than that of the Small Magellanic Cloud, it remains essentially unexplored how fossil magnetic fields, forming large-scale magnetospheres, could affect the evolution of massive stars, thereby impacting the fundamental building blocks of the early Universe. We extend our stellar evolution model grid with representative calculations of main-sequence, single-star models with initial masses of 20 and 60 M☉, including appropriate changes for low-metallicity environments (Z = 10−3–10−6). We scrutinise the magnetic, rotational, and chemical properties of the models. When lowering the metallicity, the rotational velocities can become higher and the tendency towards quasi-chemically homogeneous evolution increases. While magnetic fields aim to prevent the development of this evolutionary channel, the weakening stellar winds lead to less efficient magnetic braking in our models. Since the stellar radius is almost constant during a blueward evolution caused by efficient chemical mixing, the surface magnetic field strength remains unchanged in some models. We find core masses at the terminal-age main sequence between 22 and 52 M☉ for initially 60 M☉ models. This large difference is due to the vastly different chemical and rotational evolution. We conclude that in order to explain chemical species and, in particular, high nitrogen abundances in the early Universe, the adopted stellar models need to be under scrutiny. The assumptions regarding wind physics, chemical mixing, and magnetic fields will strongly impact the model predictions. © 2024, CC BY.

关键词： Giant stars

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Transition probabilities of near-infrared Ce III lines from stellar spectra: applications to kilonovae

arXiv

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arXiv 2023年

作者： Domoto, Nanae Lee, Jae-Joon Tanaka, Masaomi Lee, Ho-Gyu Aoki, Wako Ishigaki, Miho N. Wanajo, Shinya Kato, Daiji Hotokezaka, Kenta Astronomical Institute Tohoku University Aoba Sendai980-8578 Japan Korea Astronomy and Space Science Institute 776 Daedeok-daero Yuseong-gu Daejeon34055 Korea Republic of Division for the Establishment of Frontier Sciences Organization for Advanced Studies Tohoku University Sendai980-8577 Japan Space Policy Research Center Science and Technology Policy Institute 370 Sicheong-daero Sejong30147 Korea Republic of National Astronomical Observatory 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Astronomical Science Program The Graduate University for Advanced Studies SOKENDAI 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Am Mühlenberg 1 Potsdam-GolmD-14476 Germany RIKEN Saitama Wako351-0198 Japan National Institute for Fusion Science 322-6 Oroshi-cho Toki509-5292 Japan Interdisciplinary Graduate School of Engineering Sciences Kyushu University Fukuoka Kasuga816-8580 Japan Research Center for the Early Universe Graduate School of Science University of Tokyo Tokyo Bunkyo113-0033 Japan UTIAS The University of Tokyo Chiba Kashiwa277-8583 Japan

Kilonova spectra provide us with information of r-process nucleosynthesis in neutron star mergers. However, it is still challenging to identify individual elements in the spectra mainly due to lack of experimentally accurate atomic data for heavy elements in the near-infrared wavelengths. Recently, Domoto et al. (2022) proposed the absorption features around 14500 Å in the observed spectra of GW170817/AT2017gfo as Ce III lines. But they used theoretical transition probabilities (gf-values) whose accuracy is uncertain. In this paper, we derive the astrophysical gf-values of the three Ce III lines, aiming at verification of this identification. We model high resolution H-band spectra of four F-type supergiants showing the clear Ce III absorption features by assuming stellar parameters derived from optical spectra in literatures. We also test the validity of the derived astrophysical gf-values by estimating Ce III abundances in Ap stars. We find that the derived astrophysical gf-values of the Ce III lines are systematically lower by about 0.25 dex than those used in previous work of kilonovae, while they are still compatible within the uncertainty range. By performing radiative transfer simulations of kilonovae with the derived gf-values, we find that the identification of Ce III as a source of the absorption features in the observed kilonova spectra still stands, even considering the uncertainties in the astrophysical gf-values. This supports identification of Ce in the spectra of GW170817/AT2017gfo. © 2023, CC BY.

关键词： Stars

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RoboRIO-based Crop Harvesting Robot

RoboRIO-based Crop Harvesting Robot

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International Symposium on Computer, Consumer and Control (IS3C)

作者： Kuo- Hsien Hsia Ze-Yu Huang Bo-Jun Yang Jia-Ming Hsiao Bachelor Program in Interdisciplinary Studies National Yunlin University of Science and Technology Douliou Taiwan National Yunlin University of Science and Technology Douliou Taiwan Graduate School of Engineering Science and Technology National Yunlin University of Science and Technology Douliou Taiwan

ISBN: (数字)9781728193625

ISBN: (纸本)9781728193632

Due to the change in life style and the gradual rise of health awareness, more and more people have given up their jobs, returned to the countryside, and bought or rented a small piece of land to live the life of small farmers. Therefore, small agricultural machinery will gradually have a place in the future market. In this paper, aiming at small and medium-sized farmers of cucumber planting, we have designed a prototype of a mobile robot for harvesting low-hanging crop like cucumbers. It is based on the NI roboRIO controller, and Mecanum-wheels are used as the moving wheel. After preliminary real-machine simulation, it was verified that the designed robot can meet the needs of assisting the harvesting of hanging crops.

关键词： Computational modeling Wheels Prototypes Agricultural machinery Agriculture Mobile robots

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