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Further Improvement of Reflection Efficiency of a Magnetic Mirror and Replenishment against Loss of Escaping Deuteron Ions

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Journal of Modern Physics 2019年第2期10卷 145-156页

作者： Mitsuaki Nagata Keiichi sawada Soft Creator Company Kyoto Japan

We reported previously the idea to improve reflection-ability of a magnetic mirror by installing a cyclotron resonance space in the front part of the mirror. However, since the previous analysis was insufficient from the examination after that, we complement the following two things in this work: 1) A simpler procedure of design to make a supplemental magnetic mirror with the simplest magnetic configuration, compared with the procedure reported previously. 2) A peculiar characteristic arising only in reflection of a nonrelativistic charged particle (a deuteron ion).

关键词： Magnetic Mirror Cyclotron Resonance Heating Reflection and Replenishment of Deuteron Ions

Positivity-Preserving Numerical Methods for Belousov-Zhabotinsky Reaction

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Applied Mathematics 2020年第10期11卷 943-950页

作者： Yuro Adachi Novrianti Okihiro sawada Applied Physics Course Faculty of Engineering Gifu University Gifu Japan Faculty of Engineering Kitami Institute of Technology Kitami Japan

The existence of positive solutions to the system of ordinary differential equations related to the Belousov-Zhabotinsky reaction is established. The key idea is to use a new successive approximation of solutions, ensuring its positivity. To obtain the positivity and invariant region for numerical solutions, the system is discretized as difference equations of explicit form, employing operator splitting methods with linear stability conditions. Algorithm to solve the alternate solution is given.

关键词： Positive Solution Difference Equation Belousov-Zhabotinsky Reaction Invariant Region Maximum Principle

Neurorehabilitation using a voluntary driven exoskeletal robot improves trunk function in patients with chronic spinal cord injury: a single-arm study

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Neural Regeneration Research 2022年第2期17卷 427-432页

作者： Hiroki Okawara Syoichi Tashiro Tomonori sawada Keiko Sugai Kohei Matsubayashi Michiyuki Kawakami Satoshi Nori Osahiko Tsuji Narihito Nagoshi Morio Matsumoto Masaya Nakamura Department of Orthopaedic Surgery Keio University School of MedicineTokyoJapan Department of Rehabilitation Medicine Keio University School of MedicineTokyoJapan Department of Orthopedic Surgery National Hospital OrganizationMurayama Medical CenterTokyoJapan

Body weight-supported treadmill training with the voluntary driven exoskeleton(VDE-BWSTT) has been shown to improve the gait function of patients with chronic spinal cord injury. However, little is known whether VDE-BWSTT can effectively improve the trunk function of patients with chronic spinal cord injury. In this open-label, single-arm study, nine patients with chronic spinal cord injury at the cervical or thoracic level(six males and three females, aged 37.8 ± 15.6 years, and time since injury 51.1 ± 31.8 months) who underwent outpatient VDE-BWSTT training program at Keio University Hospital, Japan from September 2017 to March 2019 were included. All patients underwent twenty 60-minute gait training sessions using VDE. Trunk muscular strength, i.e., the maximum force against which patient could maintain a sitting posture without any support, was evaluated in four directions: anterior, posterior, and lateral(right and left) after 10 and 20 training sessions. After intervention, lateral muscular strength significantly improved. In addition, a significant positive correlation was detected between the change in lateral trunk muscular strength after 20 training sessions relative to baseline and gait speed. The change in trunk muscular strength after 20 training sessions relative to baseline was greatly correlated with patient age. This suggests that older adult patients with chronic spinal cord injury achieved a greater improvement in trunk muscle strength following VDE-BWSTT. All these findings suggest that VDE-BWSTT can improve the trunk function of patients with chronic spinal cord injury and the effect might be greater in older adult patients. The study was approved by the Keio University of Medicine Ethics Committee(IRB No. 20150355-3) on September 26, 2017.

关键词： body weight-supported treadmill training gait disorders hybrid assistive limb neurologic neurophysiotherapy postural balance precision medicine robot-assisted gait training robotics spinal cord injury trunk

Invasive group B streptococcal infection in a patient with post splenectomy for hypersplenism secondary to liver cirrhosis and portal hypertension

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World Journal of Emergency Medicine 2016年第1期7卷 68-70页

作者： Tomoya Okazaki Toru Hifumi Arisa Manabe Hikari Matsumura Satoshi Egawa Hideyuki Hamaya Nastuyo Shinohara koshiro Takano Hajime Shishido Yuko Abe Kenya Kawakita Masanobu Hagiike Yasuhiro Kuroda Emergency Medical Center Kagawa University Hospital Kita Kagawa 761-0793 Japan

BACKGROUND:Splenectomy in patients with liver cirrhosis(LC)is expected to become more common owing to its efficacy on portal *** this report we describe an alarming case of group B streptococcus(GBS)infection after splenectomy in a patient with ***:A 72-year-old woman with a history of LC was admitted to our emergency department because of respiratory *** patient had received left lateral segmentectomy of the liver and splenectomy three months before *** examination revealed significant wheezing during inspiration and expiration,but no crackles and *** radiography and CT showed no infiltrates.A presumptive diagnosis of bronchial asthma caused by upper respiratory infection was *** days after admission,GBS infection was confirmed by blood culture and penicillin G was *** were given intravenously for a total of 12 ***:The patient was discharged on the 12th day after ***:Although efficacy of splenectomy in patients with LC has been reported,immune status should be evaluated for a longer *** who have undergone splenectomy are highly susceptible to bacteria;moreover,LC itself is an independent risk factor for mortality in patients with *** prophylaxis against GBS has not been established,immediate action should be *** physicians should be aware of invasive GBS infection in the context of the critical risk factors related to splenectomy and LC,particularly the expected increase of splenectomy performed in LC patients.

关键词： Group B streptococcal infection Splenectomy Liver cirrhosis

Percutaneous Vertebroplasty

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Percutaneous Vertebroplasty

Cases of pediatric intra-abdominal solid organ injury induced by blunt trauma experienced over a 15-year period at two centers in Japan

第八届全国肿瘤介入诊疗学术大会、第一届中国抗癌协会肿瘤介入学护理专业学组会议暨国家级介入诊疗继续教育学习班、肿瘤介入治疗新进展研讨会

作者： Satoshi sawada Department of Radiology Kansai Medical University Japan

Percutaneous vertebroplasty has an excellent pain-relieving effect on compression fracture due to various causes,and has therefore attracted much attention as a new therapeutic technique for this *** is a relatively simple technique that involves advancing a needle through the skin and into the affected vertebral body,whereupon cement is ***,the method adopted varies according to the operator and the center at which it is *** situation is similar for imaging guidance,with some centers employing bilateral fluoroscopy and others using a combination of both CT and fluoroscopy.

关键词： MRI Percutaneous Vertebroplasty

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World Journal of Pediatric Surgery 2023年第3期6卷 168-174页

作者： Mayu Matsui koshiro Sugita Takafumi Kawano Nanako Nishida Ayaka Nagano Masakazu Murakami Keisuke Yano Toshio Harumatsu Shun Onishi Koji Yamada Waka Yamada Mitsuru Muto Tatsuru Kaji Satoshi Ieiri Department of Pediatric Surgery Kagoshima City HospitalKagoshimaJapan Department of Pediatric Surgery Research Field in Medical and Health SciencesMedical and Dental AreaResearch and Education AssemblyKagoshima UniversityKagoshimaJapan Department of Pediatric Surgery Kurume University School of MedicineKurumeJapan

Objective The present study attempts to clarify the clinical features of pediatric intra-abdominal solid organ injury at two *** The injured organ,patient age,sex,injury grade,imaging findings,intervention,length of hospital stay,and complications were retrospectively reviewed using medical records at two centers from 2007 to *** There were 25 cases of liver injury,9 of splenic injury,8 of pancreatic injury,and 5 of renal *** mean age of all patients was 8.6±3.8 years old,with no difference between organ injury *** intervention was performed in four cases of liver injury(16.0%)and one case of splenic injury(11.1%),and surgery was performed in two cases of liver injury(8.0%)and three cases of pancreatic injury(37.5%).All other cases were treated *** included adhesive ileus in one case of liver injury(4.0%),splenic atrophy in one case of splenic injury(11.1%),pseudocysts in three cases of pancreatic injury(37.5%),atrophy of the pancreatic parenchyma in one case of pancreatic injury(12.5%),and urinoma in one case of renal injury(20.0%).No mortalities were *** Pediatric patients with blunt trauma had favorable outcomes at two pediatric trauma centers covering a broad medical area,including remote islands.

关键词： pediatric trauma injury

Facile Preparation of Fluoroalkyl End-Capped Vinyltrimethoxysilane Oligomer/Sand Composites Possessing Superoleophilic/Superhydrophobic Characteristic: Application to Oil/Water Separation and Selective Removal of Fluorinated Aromatic Compounds from Aqueous Methanol Solution

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Open Journal of Composite Materials 2022年第1期12卷 56-71页

作者： Hideo sawada Kako Tono Katsumi Yamashita Department of Frontier Materials Chemistry Graduate School of Science and Technology Hirosaki University Hirosaki Japan Department of Frontier Materials Chemistry Faculty of Science and Technology Hirosaki University Hirosaki Japan

Fluoroalkyl end-capped vinyltrimethoxysilane oligomer [RF-(CH2-CHSi(OMe)3)n-RF: n = 2, 3, RF = CF(CF3)OC3F7: RF-(VM)n-RF], was applied to the facile preparation of the corresponding oligomer/sand (Ottawa sand: OS) ... 详细信息

关键词： Fluorinated Oligomeric Composite Micro-Sized Ottawa Sand Particle Superoleophilic/Superhydrophobic Property Smooth Separation of Oil and Water Selective Removal of Fluorinated Aromatic Compound

Wettability Control between Oleophobic/Superhydrophilic and Superoleophilic/Superhydrophobic Characteristics on the Modified Surface Treated with Fluoroalkyl End-Capped Oligomers/Micro-Sized Polystyrene Particle Composites

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Open Journal of Composite Materials 2022年第1期12卷 41-55页

作者： Hideo sawada Koki Arakawa Yuta Aomi Department of Frontier Materials Chemistry Graduate School of Science and Technology Hirosaki University Hirosaki Japan

Fluoroalkyl end-capped vinyltrimethoxysilane-N,N-dimethylacrylamide cooligomer [RF-(CH2-CHSi(OMe)3)x-(CH2-CHC(=O)NMe2)y-RF;RF = CF(CF3)OC3F7: RF-(VM)x-(DMAA)y-R

关键词： Fluorinated Oligomeric Composite Micro-Sized Polystyrene Particle Surface Modification Surface Wettability Change Oleophobic/Superhydrophilic Property Superoleophilic/Superhydrophobic Property

Synthesis and BK channel-opening activity of novel N-acylhydrazone derivatives from dehydroabietic acid

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Chinese Chemical Letters 2013年第11期24卷 1023-1026页

作者： Xia-Shi Lv Yong-Mei Cui He-Yun Wang Hai-Xia Lin Wei-Ya Ni Tomohiko Ohwada Katsutoshi Ido Kohei sawada Department of Chemistry College of Sciences Shanghai University Graduate School of Pharmaceutical Sciences The University of Tokyo Tsukuba Research Laboratories Eisai Co. Ltd

A series of hydrazone and N-acylhydrazone derivatives of dehydroabietic acid were synthesized and evaluated for BK channel-opening activities in an assay system of CHO-K1 cells expressing hBKa *** assay results indicated that the activities of the investigated compounds were influenced by the physicochemical properties of the substituent at hydrazone moiety.

关键词： BK channels Openers Dehydroabietic acid N-Acylhydrazone