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Finite Abelian Groups of K3 Surfaces with Smooth Quotient

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Chinese Annals of Mathematics,Series B 2023年第1期44卷 99-162页

作者： taro HAYASHI Faculty of Agriculture Kindai UniversityNakamaticho 3327-204NaraNara 631-8505Japan

The quotient space of a K3 surface by a finite group is an Enriques surface or a rational surface if it is *** groups where the quotient space are Enriques surfaces are *** this paper,by analyzing effective divisors on smooth rational surfaces,the author will study finite groups which act faithfully on K3 surfaces such that the quotient space are *** particular,he will completely determine effective divisors on Hirzebruch surfaces such that there is a finite Abelian cover from a K3 surface to a Hirzebrunch surface such that the branch divisor is that effective ***,he will decide the Galois group and give the way to construct that Abelian cover from an effective divisor on a Hirzebruch ***,he studies the same theme for Enriques surfaces.

关键词： K3 surface Finite Abelian group Abelian cover of a smooth rational surface

Nonequilibrium molecular dynamics for accelerated computation of ion–ion correlated conductivity beyond Nernst–Einstein limitation

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npj Computational Materials 2023年第1期9卷 1796-1803页

作者： Ryoma Sasaki Bo Gao taro Hitosugi Yoshitaka Tateyama School of Materials and Chemical Technology Tokyo Institute of Technology2-12-1 OokayamaMeguroTokyo 152-8552Japan Center for Green Research on Energy and Environmental Materials National Institute for Material Science1-1 NamikiTsukubaIbaraki 305-0044Japan Department of Chemistry The University of Tokyo7-3-1 HongoBunkyoTokyo 113-0033Japan

Condensed matters with high ionic conductivities are crucial in various solid devices such as solid-state batteries. The conduction ischaracterized by the cooperative ionic motion associated with the high carrier density. However, the high cost of computingcorrelated ionic conductivities has forced almost all ab initio molecular dynamics (MD) to rely on the Nernst–Einstein dilute-solutionapproximation, which ignores the cross-correlation effect. Here we develop a chemical color-diffusion nonequilibrium MD (CCD-NEMD) method, which enables to calculate the correlated conductivities with fewer sampling steps than the conventional MD. ThisCCD-NEMD is demonstrated to well evaluate the conductivities in the representative solid electrolyte bulk Li10GeP2S12 andLi_(7)La_(3)Zr_(2)O_(12). We also applied CCD-NEMD to the grain boundary of Li_(7)La_(3)Zr_(2)O_(12) and demonstrated its applicability for calculatinginterfacial local conductivities, which is essential for investigating grain boundaries and composite electrolytes. CCD-NEMD canprovide further accurate understanding of ionics with ionic correlations and promote developing solid devices.

关键词： dynamics Nernst steps

Large-scale experimental study on scour around offshore wind monopiles under irregular waves

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Water Science and Engineering 2022年第1期15卷 40-46页

作者： Song-gui Chen En-yu Gong Xu Zhao taro Arikawa Xin Chen Tianjin Research Institute for Water Transport Engineering Tianjin 300456China College of Water Resources and Civil Engineering China Agricultural UniversityBeijing 100083China Department of Civil and Environmental Engineering Chuo UniversityTokyo 112-8551Japan

The Keulegan-Carpenter(KC)number is the main dimensionless parameter that affects the local scour of offshore wind power monopile *** study conducted large-scale(1:13)physical model tests to study the local scour shape,equilibrium scour depth,and local scour volume of offshore wind power monopiles under the action of irregular waves with different KC *** experiments were carried out with the KC number ranging from 1.0 to *** a small KC number(KC6),the proposed method better predicted the equilibrium scour depth when the wave *** addition,according to the results of three-dimensional terrain scanning,the relationship between the local equilibrium scour volume of a single offshore wind power monopile and the KC number was *** provided a rational method for estimation of the riprap redundancy for monopile protection against scour.

关键词： Keulegan-Carpenter number Large-scale test Scour hole shape Equilibrium scour depth Local scour hole volume

Association of antithrombotic therapy with postoperative rebleeding in patients with cerebral amyloid angiopathy

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Chinese Neurosurgical Journal 2023年第3期9卷 159-165页

作者： taro Yanagawa Hiroki Sato Kaima Suzuki Hidetoshi Ooigawa Masaki Takao Hiroki Kurita Department of Cerebrovascular Surgery International Medical CenterSaitama Medical University1397-1 YamaneHidaka CitySaitama 350-1298Japan Stroke Center Sagamihara Kyodo Hospital4-3-1 HashimotodaiMidori-KuSagamihara CityKanagawa-Pref 252-5188Japan Department of Clinical Laboratory National Center of Neurology and PsychiatryNational Center Hospital4-1-1Ogawa-HigashiKodairaTokyo 187-8502Japan

Background Cerebral amyloid angiopathy is a common cause of subcortical hemorrhage in older *** open hematoma removal may be performed for severe subcortical hemorrhage,its safety in patients with cerebral amyloid angiopathy has not been established,and postoperative rebleeding may ***,this study aimed to investigate factors associated with postoperative *** Out of 145 consecutive patients who had undergone craniotomy for surgical removal of subcortical intracerebral hemorrhage between April 2010 and August 2019 at a single institution in Japan,we examined 109 patients with subcortical hemorrhage who met the inclusion *** excluding 30 patients whose tissue samples were unsuitable for the study,the final study cohort comprised 79 *** Of the 79 patients,50(63%)were diagnosed with cerebral amyloid angiopathy(cerebral amyloid angiopathy group)and 29(37%)were not diagnosed with noncerebral amyloid angiopathy(noncerebral amyloid angiopathy group).Postoperative rebleeding occurred in 12 patients(24%)in the cerebral amyloid angiopathy group and in 2 patients(7%)in the noncerebral amyloid angiopathy *** prothrombin time-international normalized ratio and intraoperative bleeding volume were significantly associated with postoperative rebleeding in the cerebral amyloid angiopathy group(odds ratio=42.4,95%confidence interval=1.14-1578;p=0.042 and odds ratio=1.005,95%confidence interval=1.001-1.008;p=0.007,respectively).Conclusions Patients with cerebral amyloid angiopathy-related cerebral hemorrhage who are receiving antithrombotic therapy,particularly warfarin therapy,are at a high risk of postoperative *** registration Registry and Registration Number of the study:19-220,2019/12/23,retrospectively registered.

关键词： Amyloid-β Antithrombotic therapy Cerebral amyloid angiopathy Postoperative rebleeding Subcortical hemorrhage

Synthesis of bulk lanthanum polyphosphate and other rare earth phosphates through hydrothermal hot-pressing

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Journal of Advanced Ceramics 2013年第4期2卷 301-307页

作者： Hiroaki ONODA taro YAMASAKI Department of Informatics and Environmental Sciences Faculty of Life and Environmental SciencesKyoto Prefectural University1-5Shimogamo Nakaragi-choSakyo-kuKyoto 606-8522Japan

Bulk samples of lanthanum polyphosphate were synthesized through a hydrothermal hot-pressing(HHP)*** this process,pressing temperature,pressure and volume of water were varied in order to improve the density and strength of the resulting *** strength of the bulk samples was estimated through drilling and ultrasonic *** order to improve the strength of the materials,the use of microwave irradiation was *** polyphosphate formed porous bulk samples with a filling factor of approximately 70%,which was calculated from real and theoretical *** respect to machinable strength,a drilled hole greater than 7.0 mm in diameter was obtained on some bulk samples,and the diameter of the samples was 14 *** HHP process is a useful method for obtaining bulk samples of lanthanum *** lanthanum polyphosphate containing water crumbled easily to a powder form upon ***,these bulk samples retained their shape upon ultrasonication,despite containing water,after exposure to microwave irradiation,and also experienced minimal weight ***,to study the effect of microwave heating,bulk lanthanum orthophosphate,yttrium orthophosphate and polyphosphate were also examined.

关键词： lanthanum polyphosphate hydrothermal hot-pressing(HHP)process machinable strength vibration strength microwave heating

Characterization of hot carrier cooling and multiple exciton generation dynamics in PbS QDs using an improved transient grating technique

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Journal of Energy Chemistry 2015年第6期24卷 712-716页

作者： Qing Shen Kenji Katayama taro Toyoda Department of Engineering Science Faculty of Informatics and EngineeringThe University of Electro-Communications Department of Applied Chemistry Faculty of Science and EngineeringChuo University

Multiple exciton generation （MEG） dynamics in colloidal PbS quantum dots （QDs） characterized with an im- proved transient grating （TG） technique will be reported. Only one peak soon after optical absorption and a fast decay within 1 ps can be observed in the TG kinetics when the photon energy of the pump light hv is smaller than 2.7Eg （Eg： band gap between LUMO and HOMO in the QDs）, which corresponds to hot carrier cooling. When hv is greater than 2.7Eg, however, after the initial peak, the TG signal decreases first and soon increases, and then a new peak appears at about 2 to 3 ps. The initial peak and the new peak correspond to hot carriers at the higher excited state and MEG at the lowest excited state, respectively. By proposing a theoretical model, we can calculate the hot carrier cooling time constant and MEG occurrence time constant quantitatively. When MEG does not happen for hv smaller than 2.7Eg, hot carrier cools with a time con- stant of 400 fs. When MEG occurs for hv larger than 2.7Eg, hot carrier cools with a time constant as small as 200 fs, while MEG occurs with a time constant of 600 fs. The detailed hot carrier cooling and MEG occurrence dynamics characterized in this work would shed light on the further understanding of MEG mechanism of various type of semiconductor QDs.

关键词： PbS Quantum dots Multiple exciton generation Hot carrier cooling Transient grating

Review on acute pancreatitis attributed to COVID-19 infection

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World Journal of Gastroenterology 2022年第19期28卷 2034-2056页

作者： Takumi Onoyama Hiroki Koda Wataru Hamamoto Shiho Kawahara Yuri Sakamoto taro Yamashita Hiroki Kurumi Soichiro Kawata Yohei Takeda Kazuya Matsumoto Hajime Isomoto Division of Gastroenterology and Nephrology Department of Multidisciplinary Internal MedicineTottori University Faculty of MedicineYonago 683-8504Tottori PrefectureJapan Department of Internal Medicine Irisawa Medical ClinicMatsue 690-0025Shimane PrefectureJapan

The coronavirus disease 2019(COVID-19)is known to cause gastrointestinal *** studies have revealed COVID-19-attributed acute pancreatitis(AP).However,clinical characteristics of COVID-19-attributed AP remain *** performed a narrative review to elucidate relation between COVID-19 and AP using the PubMed *** basic and pathological reports revealed expression of angiotensin-converting enzyme 2 and transmembrane protease serine 2,key proteins that aid in the entry of severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)into the *** experimental and pathological evaluation suggested that SARS-CoV-2 infects human endocrine and exocrine pancreas cells,and thus,SARS-CoV-2 may have a direct involvement in pancreatic ***,systemic inflammation,especially in children,may cause *** of immune mediators associated with AP,including interleukin(IL)-1β,IL-10,interferon-γ,monocyte chemotactic protein 1,and tumor necrosis factor-αare higher in the plasma of patients with COVID-19,that suggests an indirect involvement of the *** real-world settings,some clinical features of AP complicate COVID-19,such as a high complication rate of pancreatic necrosis,severe AP,and high ***,clinical features of COVID-19-attributed AP remain uncertain due to insufficient research on etiologies of ***,high-quality clinical studies and case reports that specify methods for differential diagnoses of other etiologies of AP are needed.

关键词： COVID-19 SARS-CoV-2 Pancreatitis Revised atlanta classification Prognosis Etiology

Biodegradation of trace pharmaceutical substances in wastewater by a membrane bioreactor

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Frontiers of Environmental Science & Engineering 2009年第2期3卷 236-240页

作者： Longli BO taro URASE Xiaochang WANG School of Environmental and Municipal Engineering Xi’an University of Architecture and TechnologyXi’an 710055China Department of Civil Engineering Tokyo Institute of TechnologyTokyo 152-8552Japan

The biodegradation of selected pharmaceutical micropollutants,including two pharmaceuticals with argued biodegradation,was studied by a lab-scale membrane *** reaction kinetics and affecting factors were also investigated in this *** acid(CA)with contradictive biodegradation reported was degraded almost completely at different hydraulic retention times(HRTs)after adaptation to *** biodegradation of CA was disturbed at low pH operation,while the activity of microorganisms recovered again after pH adjustment to neutral ***(IBP)degraded under neutral and acidic *** of IBP and CA were zero-order and first-order reactions under high and low initial concentrations,*** and diclofenac were not degraded regardless of HRTs and pH.

关键词： pharmaceuticals membrane bioreactor activated sludge reaction kinetics

Investigation and Improvement of the Staggered Labyrinth Seal

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Chinese Journal of Mechanical Engineering 2015年第2期28卷 402-408页

作者： LIN Zhirong WANG Xudong YUAN Xin SHIBUKAWA Naoki NOGUCHI taro Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Tsinghua University Toshiba Corporation Power Systems Company

Recent studies on staggered labyrinth seals have focused on the effects of different parameters,such as the pressure ratio and rotational speed on the leakage flow ***,few investigations pay sufficient attention to flow details and the sealing mechanism,which would be of practical importance in designing seals having higher *** paper establishes a theoretical model to study the seal mechanism,thus revealing that leakage is determined by the pressure ratio and geometric *** simulation is implemented to illustrate details of the flow field within the seal *** dissipation is used to quantitatively investigate the contribution that each location makes to the seal performance,revealing that orifices and stagnation points are the most important positions in the seal structure,generating the most *** orifice is carefully studied by using the theoretical *** for different pressure ratios are conducted and the results match well with those of the theoretical model and numerical simulation,verifying the theoretical model and analysis of the seal *** new designs,based on a good understanding of the seal mechanism,are presented,with one reducing leakage by 24.5%.

关键词： labyrinth seal numerical simulation viscous dissipation sealing mechanism