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Development of Deformation-Semisolid-Casting (D-SSC) Process and Applications to Some Aluminum Alloys

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Journal of Materials Science & Technology 2008年第1期24卷 12-16页

作者： Tatsuo sato Department of Metallurgy and Ceramics Science Tokyo Institute of Technology 2-12-1O-okayamaMeguro-kuTokyoJapan

Recent advances in the semisolid casting technologies are introduced for aluminum *** advantages of the rheocast and thixocast methods to fabricate alloys with refined spheroidizedα-Al particles are described. The deformation-semisolid-casting （D-SSC） process developed by the author＇s group is *** D-SSC process is extremely effective to produce microstructures of refined intermetallic compound particles as well as the spheroidizedα-Al particles in the Al-Si based alloys containing highly concentrated *** the D-SSC processed Al-Si-Cu alloy high elongation of about 20% was achieved even contained concentrated impurity of *** D-SSC process is also useful to produce wrought aluminum alloys with microstructures of refinedα-Al particles.

关键词： Semisolid casting Rheocast Thixocast Aluminum alloys Intermetallic compound

Pentagon-Containing Doublet Graphene Fragments with Edge-Dependent Spin/Charge Distribution

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Chinese Journal of Chemistry 2022年第21期40卷 2525-2530页

作者： Zongcheng Gong Qin Xiang Ke Li Zhuofan Xu Jinlian Hu Yong Ni Sota sato Zhe Sun Institute of Molecular Plus Departmentof ChemistryTianjin University92 Weijin RoadTianjin 300072China Department of Chemistry Southern University of Science and TechnologyShenzhenGuangdong 518055China Department of Applied Chemistry Integrated Molecular Structure Analysis LaboratorySocial Cooperation ProgramThe University of Tokyo113-8654Japan Haihe Laboratoryof Sustainable Chemical Transformations Tianjin 300192China

The synthesis of stable open-shell hydrocarbon system comprising of pentagon defects and zigzag edges remains unexplored,which can be considered as model compounds for unraveling the spin-localized states in graphene *** concise synthetic approaches,twoπ-extended fluorenyl radicals were synthesized and isolated in their crystalline state.X-ray crystallographic analysis and studies on the magnetic,optical and electrochemical properties of neutral and charged species have revealed an interesting edge-dependence of the spin/charge distribution,that is,the spin and charge distribution shifted from the pentagon defects to the zigzag edges with the elongation of *** phenomenon was unprecedented for hydrocarbon radicals and can be rationalized by the recovery of Clar Sextets in the dominant resonance ***,one of the radicals exhibited exceptional stability in air-saturated solutions with the half-life time up to 260 d,thus providing opportunities for the applications as electronic materials.

关键词： Radicals Graphene edge structure Fluorenyl radical Conjugation Clar Sextets

Research on Lightning Protection of Overhead Power Distribution Lines

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高电压技术 2013年第10期39卷 2317-2328页

作者： Shigeru Yokoyama Tomoyuki sato Graduate School of Engineering Shizuoka University Shizuoka 4228526 Japan Tohoku Electric Power Company Sendai 9808550 Japan

There are two major protective methods against lightning outages on overhead distribution *** is a surge arrester,and the other is an overhead ground *** surge arresters have rather constant effect regardless of the cause of the lightning *** the other hand,the effect of an overhead ground wire is quite different in two major causes,the direct lightning hit and the induced *** is sufficient to provide surge arresters with an interval of 300 m for protection against the induced overvoltage caused by the nearby lightning *** of an overhead ground wire together with surge arresters is effective for lightning protection against the direct lightning hit to a distribution *** of surge arresters is the popular outage when the outage caused by the insulation break decreases ***,the existence of nearby trees leads to the line break due to the side flash from a *** lightning protection equipment with ZnO arrester components is popular in *** of a pole transformer and application of an electromagnetic analysis method,such as FDTD method,to surge phenomena is considerably advanced.

关键词：架空配电线路防雷保护雷击感应过电压时域有限差分方法架空地线避雷器防护方法直接雷击

Psychometric Properties among Japanese Women Based on the Multidimensional Assessment of Women’s Experience of Childbirth

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Open Journal of Nursing 2023年第11期13卷 718-734页

作者： Megumi sato Department of Nursing Iwate University of Health and Medical Sciences Morioka Japan

Aims/Background: Perceived experiences of childbirth are important for mothers as they affect their self-esteem, mother-child interactions, subsequent mother-child bonding, and their desire for another child. This study examined the factor structure and construct validity of Salmon and Drew’s Multidimensional Assessment of Women’s Experience of Childbirth (MAWEC) in Japanese. Design/Methods: This study conducted a questionnaire survey using the Japanese version of the MAWEC and other variables with 759 women with infants in Japan. The participants’ mean (standard deviation [SD], range) age was 31.9 (5.3, 18 - 46) years. A total of 353 (46.5%) participants were primiparous and 384 (50.6%) were multiparous, and 22 (2.9%) did not answer. The data were randomly divided into two groups for exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) and separately analyzed the positive- and negative-worded items. I conducted EFA using the maximum-likelihood method with PROMAX rotation from one-through two- and three-factor structures. Different factor structure models were compared in terms of CFAs using, as indicator of goodness-of-fit, chi-square/df, comparative fit index (CFI), and root mean square of error approximation (RMSEA). Results: This study showed that a bifactor model for the MAWEC with four subscales (positive emotion, positive coping, negative emotion, and negative coping) fit the data the best. These four subscales were associated with demographic, obstetric, neonatal, and feeding characteristics. For example, primiparas were more vulnerable to coping aspects of perceived childbirth experiences, including sense of mastery over the delivery process and ability to enjoy the delivery. Gestational age at birth was associated with emotional aspects of perceived childbirth experiences. Conclusion: The Japanese version of the MAWEC consists of four aspects regarding perceived childbirth experience. Perinatal health professionals may examine women’s c

关键词： Childbirth Experience Factor Structure Validity Multidimensional Assessment Japanese Women

Near Range Radar and Its Application to Near Surface Geophysics and Disaster Mitigation

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Journal of Earth Science 2015年第6期26卷 858-863页

作者： Motoyuki sato Center for Northeast Asian Studies Tohoku University

In this paper, we discuss about the near range radar applied to various environmental applications and disaster mitigation issues. Synthetic aperture radar（SAR） processing or migration is the key technology in near range radar imaging, which can be used in ground penetrating radar（GPR） and ground-based synthetic aperture radar（GB-SAR）. We demonstrate some applications which include GPR for humanitarian demining, GPR for archaeological survey, GB-SAR for landslide monitoring and nondestructive inspection of wooden buildings. We also demonstrate a new array GPR system “Yakumo”, which was used for archaeological survey for demonstration of advanced multi-static radar signal processing for better radar imaging.

关键词： near range radar GPR GB-SAR disaster mitigation SAR processing migration,multi-static radar.

Parallelization and sustainability of distributed genetic algorithms on many-core processors

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International Journal of Intelligent Computing and Cybernetics 2014年第1期7卷 2-23页

作者： Yuji sato Mikiko sato Faculty of Computer and Information Sciences Hosei UniversityTokyoJapan Graduate School of Engineering Tokyo University of Agriculture and TechnologyTokyoJapan

Purpose–The purpose of this paper is to propose a fault-tolerant technology for increasing the durability of application programs when evolutionary computation is performed by fast parallel processing on many-core processors such as graphics processing units(GPUs)and multi-core processors(MCPs).Design/methodology/approach–For distributed genetic algorithm(GA)models,the paper proposes a method where an island’s ID number is added to the header of data transferred by this island for use in fault ***–The paper has shown that the processing time of the proposed idea is practically negligible in applications and also shown that an optimal solution can be obtained even with a single stuck-at fault or a transient fault,and that increasing the number of parallel threads makes the system less susceptible to ***/value–The study described in this paper is a new approach to increase the sustainability of application program using distributed GA on GPUs and MCPs.

关键词： Evolutionary computation Genetic algorithms Fault identification Many-core processors Parallelization

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

Percutaneous endoscopic necrosectomy for walled-off necrosis in the retroperitoneal space of the elderly:A case report

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世界临床病例杂志 2023年第24期11卷 5736-5741页

作者： Kentaro sato Goro Shibukawa Kenta Ueda Yuki Nakajima Kazutomo Togashi Hiromasa Ohira Department of Gastroenterology Aizu Medical Center Fukushima Medical UniversityAizuwakamatsu 969-3492FukushimaJapan Department of Gastroenterology Fukushima Medical University School of MedicineFukushima 960-1295FukushimaJapan

BACKGROUND Walled-off necrosis(WON)is a late complication of acute pancreatitis possibly with a fatal *** for WON spreading to the retroperitoneal space,percutaneous endoscopic necrosectomy(PEN)can be an alternate approach to surgical necrosectomy,particularly for the older individuals or patients with poor condition because of *** SUMMARY An 88-year-old man was admitted to our hospital with a *** retrograde cholangiopancreatography(ERCP)was performed to improve jaundice;however,post-ERCP pancreatitis *** inflammation of pancreatitis spread widely from the right retroperitoneal cavity to the pelvis,and WON was formed 4 wk later.A percutaneous drainage tube was placed into the WON under computed tomography ***,the drainage did not ameliorate clinical symptoms including fever,which assured less invasive necrosectomy.A metallic stent for the upper gastrointestinal(GI)tract was placed from the percutaneous drainage *** upper GI endoscope was inserted into the inside of the WON through the metallic stent,and the necrotic tissues were bluntly removed with a snare *** times of these necrosectomies resulted in the near-complete removal of necrotic *** procedures consequently abated his fever and remarkable improvement in blood *** PEN for WON occurring in the retroperitoneal space was safe and effective for very old individuals.

关键词： Walled-off necrosis Percutaneous drainage Endoscopic necrosectomy Post endoscopic retrograde cholangiopancreatography pancreatitis Elderly Case report

DESIGN AND PHOTOFUNCTIONS OF DENDRIMER-ENCAPSULATED POLY(PHENYLENEETHYNYLENE)S

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Chinese Journal of Polymer Science 2001年第2期19卷 161-166页

作者： Takafumi sato Takuzo Aida Department of Chemistry and Biotechnology Graduate School of Engineering The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 JapanDepartment of Chemistry and Biotechnology Graduate School of Engineering The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan

A series of dendrimer-encapsulated poly(phenyleneethynylene)s 4～6 were Synthesize d. The light-harvesting antenna functions of dendrimer frameworks together with the blue-light emitting activities of 4～6 were highli... 详细信息

关键词： Dendrimer Poly(phenyleneethynylene) Molecular wire Light-harvesting antenna Energy transfer