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An Improved Coupled Level Set and Continuous Moment-of-Fluid Method for Simulating Multiphase Flows with Phase Change

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Communications on Applied Mathematics and Computation 2024年第2期6卷 1034-1069页

作者： Zhouteng Ye Cody Estebe Yang Liu Mehdi Vahab Zeyu Huang Mark Sussman Alireza Moradikazerouni Kourosh Shoele Yongsheng Lian mitsuhiro Ohta M.Yousuff Hussaini ZJUI Institute Zhejiang UniversityHaining 314400ZhejiangChina Department of Mathematics Florida State UniversityTallahasseeUSA Department of Mechanical Engineering Florida State UniversityTallahasseeUSA Mechanical and Aerospace Engineering Mathworks NatickMAUSA School of Aerospace Engineering Tsinghua UniversityBeijing 100084China Department of Mechanical Engineering University of LouisvilleLouisvilleUSA Department of Mechanical Science Tokushima UniversityTokushimaJapan

An improved algorithm for computing multiphase flows is presented in which the multimaterial Moment-of-Fluid(MOF)algorithm for multiphase flows,initially described by Li et al.(2015),is enhanced addressing existing MOF difficulties in computing solutions to problems in which surface tension forces are crucial for understanding salient flow *** Continuous MOF(CMOF)method is motivated in this *** CMOF reconstruction method inherently removes the"checkerboard instability"that persists when using the MOF method on surface tension driven multiphase(multimaterial)*** CMOF reconstruction algorithm is accelerated by coupling the CMOF method to the level set method and coupling the CMOF method to a decision tree machine learning(ML)*** flow examples are shown in the two-dimensional(2D),three-dimensional(3D)axisymmetric"RZ",and 3D coordinate *** include two material and three material multiphase flows:bubble formation,the impingement of a liquid jet on a gas bubble in a cryogenic fuel tank,freezing,and liquid lens dynamics.

关键词： Moment-of-Fluid(MOF) Surface tension Two phase flow Phase change Deforming boundaries with change(s)in topology Two-dimensional(2D) Three-dimensional(3D)axisymmetric 3D

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Rapidly enlarged inflammatory hepatocellular adenoma: A case report

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Open Journal of Gastroenterology 2013年第4期3卷 227-230页

作者： Kenji Koneri Hidetaka Kurebayashi Katsuji Sawai Yasuo Hirono mitsuhiro morikawa Makoto Murakami Takanori Goi Atsushi Iida Kanji Katayama Hiroshi Itoh Motoko Sasaki Yasuni Nakanuma Akio Yamaguchi Department of Gastroenterological Surgery University of Fukui Fukui Japan Department of Human Pathology Kanazawa University Graduate School of Medicine Kanazawa Japan Department of Tumor Pathology University of Fukui Fukui Japan

We present a rare case of rapidly enlarging inflamematory hepatocellular adenoma (IHCA) in a 60-year-old Japanese man. Screening abdominal computed tomography (CT) for the fatty liver patient revealed a 1.7-cm liver mass in the anterior segment of the liver. After 19 months, the lesion had rapidly enlarged to 6 cm in diameter and the patient was referred to our hospital. On perflubutane microbubble contrast-enhanced ultrasonography, the tumor showed a characteristic centripetal filling pattern in the vascular phase. We performed hepatic anterior segment resection because we could not rule out malignant tumor. Histopathological examination showed hyperplasia of mildly atypical hepatocytes and sinusoidal dilatation with marked inflammatory cell infiltration. Immunohistological staining revealed positive staining for serum amyloid A and C-reactive protein;therefore, we diagnosed this tumor as IHCA. The patient remains alive 42 months after operation without evidence of recurrence.

关键词： Inflammatory Hepatocellular Adenoma Perflubutane Microbubble Contrast-Enhanced Ultrasonography Surgery Rapid Enlargement

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Effects of Porous Graphene on LiOH Based Composite Materials for Low Temperature Thermochemical Heat Storage

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Journal of Renewable Materials 2022年第11期10卷 2895-2906页

作者： Lisheng Deng Hongyu Huang Zhaohong He Shijie Li Zhen Huang mitsuhiro Kubota You Zhou Dezhen Chen Thermal and Environmental Engineering Institute School of Mechanical EngineeringTongji UniversityShanghai200092China Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou510640China Department of Chemical Engineering Graduate School of EngineeringNagoya UniversityNagoya464-8603Japan National Institute of Clean-and-Low-Carbon Energy Beijing102200China

Thermochemical heat storage material inorganic hydrate LiOH is selected as a promising candidate material for storing low-temperature heat energy because of its high energy density(1440 kJ/kg)and mild reaction ***,the low hydration rate of LiOH limits the performance of low temperature thermochemical heat storage system as well as the thermal *** this study,porous-graphene/LiOH composite thermochemical heat storage materials with strong water sorption property and higher thermal conductivity were synthesized by hydrothermal *** experimental results show that the hydration rate of the composites was greatly *** heat storage density of the composite materials was increased by 47%(from 661 kJ/kg to 974 kJ/kg).By combing the porous graphene,the thermal conductivity of composites with different contents were highly increased by 21.1%to 78.7%,but the increase of heat storage density is opposite to that of thermal *** development of high-performance materials for thermochemical heat storage should consider the relationship between the heat storage density and thermal conductivity of the material,and the thermal conductivity of the supporter needs to be further improved.

关键词： Thermochemical heat storage hydration thermal conductivity porous graphene

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Effects of loading contact on electric-power generation of lead zirconate titanate piezoelectric ceramic plate

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Journal of Advanced Ceramics 2019年第4期8卷 509-518页

作者： mitsuhiro OKAYASU Tsukasa OGAWA Graduate School of Natural Science and Technology Okayama University

To better understand the generation of electric power for piezoelectric Pb Zr Ti O3(PZT)ceramic plate(?25 mm),an attempt was made to investigate experimentally and numerically electricpower generation characteristics during cyclic bending under various loading fixtures(?0–?20 mm),i.e.,different contact *** the load-contact area on the PZT ceramic leads to a nonlinear decrease in the generated *** contact area basically enhances the generated voltage,although the voltage saturates during loading when the contact area is less than?5 mm.A similar voltage is generated for?0 and?5 mm,which is attributed to strain status(ratio of compressive and tensile strain)and material failure due to different stress distribution in the PZT *** the basis of the obtained electric generation voltage,suitable loading conditions are clarified by loading with the?5 mm fixture,which generates a higher voltage and a longer lifetime of the PZT *** this approach,it is appeared that the area contact with the area ratio of 0.04(?5 mm/?20 mm)is suitable to obtain the high efficiency of the electric voltage.

关键词： piezoelectric ceramic lead zirconate titanate ceramic electric power generation

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The future of bone marrow stromal cell transplantation for the treatment of spinal cord injury

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Neural Regeneration Research 2015年第3期10卷 383-384页

作者： mitsuhiro Enomoto Department of Orthopaedic and Spinal Surgery Graduate SchoolTokyo Medical and Dental University Hyperbaric Medical Center Tokyo Medical and Dental University

Bone marrow stromal cell （BMSC） transplantation therapy is a promising approach for treating spinal cord injury （SCI）, based on a number of experimental and clinical reports （Wright et al., 2011）. BMSCs are a source of neuroregenerative somatic stem cells that are without the potential for tumorigenicity. Although clinical studies of autologous BMSC transplantation have been reported in Asia （fiang et al., 2013; Yoon et al., 2007）, in Japan, it is currently an uncommon procedure and highly controversial as well. This perspective paper provides an overview of the clinical effectiveness of BMSC trans- 191antation and a proposal to enhance its use as a viable therapy.

关键词： BMSCs The future of bone marrow stromal cell transplantation for the treatment of spinal cord injury SCI bone cell

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Novel image-enhanced endoscopy with i-scan technology

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World Journal of Gastroenterology 2010年第9期16卷 1043-1049页

作者： Shinya Kodashima mitsuhiro Fujishiro Department of Endoscopy and Endoscopic Surgery Graduate School of MedicineThe University of Tokyo

i-scan technology is the newly developed imageenhanced endoscopy technology from PENTAX,*** consists of three types of algorithms:surface enhancement (SE),contrast enhancement (CE),and tone enhancement (TE).SE enhances light-dark contrast by obtaining luminance intensity data for each pixel and applying an algorithm that allows detailed observation of a mucosal surface *** digitally adds blue color in relatively dark areas,by obtaining luminance intensity data for each pixel and applying an algorithm that allows detailed observation of subtle irregularities around the *** enhancement functions work in real time without impairing the original color of the organ,therefore,SE and CE are suitable for screening endoscopy to detect gastrointestinal tumors at an early *** dissects and analyzes the individual RGB components of a normal *** algorithm then alters the color frequencies of each component and recombines the components to a single,new color *** is designed to enhance minute mucosal structures and subtle changes in *** works in real time and consists of three modes such as TE-g for gastric tumors,TE-c for colonic tumors,and TE-e for esophageal *** is suitable mainly for detailed examination of the lesions that are detected in a screening endoscopy.i-scan technology leads us to easier detection,diagnosis and treatment of gastroi ntestinal diseases.

关键词： Gastrointestinal tumor Gastrointestinal endoscopy

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Laparoscopic retroperitoneal lymph node dissection versus open retroperitoneal lymph node dissection for testicular cancer:A comparison of clinical and perioperative outcomes

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Asian Journal of Urology 2022年第2期9卷 119-124页

作者： Toshihide Shishido Takatsugu Okegawa Kenjiro Hayashi Kazuki Masuda Satoru Taguchi Yu Nakamura mitsuhiro Tambo Hiroshi Fukuhara Department of Urology Hachioji Medical CenterTokyo Medical University1163TatemachiHachiojiTokyoJapan Department of Urology Kyorin University School of Medicine6-20-2 ShinkawaMitakaTokyoJap

Objective:This study was performed to evaluate the clinical and perioperative outcomes of laparoscopic retroperitoneal lymph node dissection(L-RPLND)and open retroperitoneal lymph node dissection(O-RPLND)performed by one surgeon at a single ***:We evaluated 30 patients with stage IIA germ cell tumors who underwent retroperitoneal lymph node dissection(15 underwent L-RPLND and 15 underwent O-RPLND)at our institution between April 1,2010 and March 31,*** clinical parameters were compared between patients who underwent L-RPLND using the retroperitoneal approach and those who underwent O-RPLND using the transperitoneal *** were no significant differences in the background characteristics of the two groups except for the median follow-up duration(46 months for L-RPLND and 71 months for O-RPLND,p=0.02).Results:L-RPLND was associated with a shorter mean operative time(mean 222 min for L-RPLND vs.453 min for O-RPLND,p<0.001).There was significantly less blood loss during surgery in the L-RPLND group compared to the O-RPLND group(mean 165 mL for L-RPLND vs.403 mL for O-RPLND,p<0.001).Parameters related to postoperative recovery were significantly better for the L-RPLND group than for the O-RPLND *** were no differences in the histopathological characteristics between the two *** patients in either group exhibited disease ***:Patients who underwent L-RPLND had more rapid recovery,and shorter hospital stay compared to those who underwent O-RPLND;complications were comparable between the two groups.L-RPLND is an efficient procedure with the benefits of minimally invasive surgery.

关键词： Laparoscopic surgery Retroperitoneal lymph node dissection Testicular tumor

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Precise analysis of compressive strain effects on electric power generation properties of a lead zirconate titanate piezoelectric ceramic

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Journal of Advanced Ceramics 2016年第1期5卷 35-39页

作者： mitsuhiro OKAYASU Keisuke WATANABE Graduate School of Natural Science and Technology Okayama University 3-1-1 Tsushimanaka Kita-kuOkayama 700-8530 Japan Graduate School of Science and Engineering Ehime University 3 Bunkyo-cho MatsuyamaEhime 790-8577 Japan

Electric power generation characteristics of lead zirconate titanate (PZT) piezoelectric ceramic have been examined during cyclic loading with different compressive strain value. A thin PZT ceramic plate attached to a thin brass plate was used. With an increasing compressive strain value in the PZT ceramic plate, the electric voltage increased, and the highest electric voltage was obtained for the sample with the high strain level (0.4%). The electric voltage decreased for the sample with more than 0.45% strain because of the failure in the PZT ceramic. The electric voltage was different depending on the strain condition, where the higher strain and the wider strain range (Δε) made the high electric voltage. Moreover, the electric voltage was attributed to the strain rate, where the higher strain rate made higher electric voltage due to high kinetic energy. The electric generation characteristics could be estimated with an operation of the strain value and strain ratio (εmin/εmax) especially for the sample loaded cyclically under the slow loading speed. This was affected by the linear correlation between the electric voltage and the strain value. Based upon the experimental work, suitable loading condition to make high electric voltage could be proposed.

关键词： energy harvesting piezoelectric ceramic cyclic loading electric power generation

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Novel aspects of extracellular adenosine dynamics revealed by adenosine sensor cells

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Neural Regeneration Research 2017年第6期12卷 881-885页

作者： Kunihiko Yamashiro mitsuhiro Morita Department of Biochemistry and Cellular Biology National Institute of Neuroscience National Center of Neurology and Psychiatry (NCNP) Department of NCNP Brain Physiology and Pathology Tokyo Medical and Dental University Graduate School of Medical and Dental Sciences Department of Biology Kobe University Graduate School of Sciences

Adenosine modulates diverse physiological and pathological processes in the brain, including neuronal activities, blood flow, and inflammation. However, the mechanisms underlying the dynamics of extracellular adenosine are not fully understood. We have recently developed a novel biosensor, called an adenosine sensor cell, and we have characterized the neuronal and astrocytic pathways for elevating extracellular adenosine. In this review, the physiological implications and therapeutic potential of the pathways revealed by the adenosine sensor cells are discussed. We propose that the multiple pathways regulating extracellular adenosine allow for the diverse functions of this neuromodulator, and their malfunctions cause various neurological and psychiatric disorders.

关键词： adenosine neuronal physiological understood astrocyte neurological Adenosine synaptic hippocampal psychiatric

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Kinematically Aligned Total Knee Arthroplasty for Valgus Osteoarthritis of More than 10°―Is It Still a “Challenging Surgery”?

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Open Journal of Orthopedics 2023年第9期13卷 355-369页

作者： Yoshinori Soda Toshiya Kano mitsuhiro Nakamura Midorii Orthopaedics Joint Reconstruction & Arthroscopy Center Hiroshima Japan Department of Orthopaedic Surgery Hiroshima City Hiroshima Citizens Hospital Hiroshima Japan Department of Orthopaedic Surgery Hiroshima Prefectural Hospital Hiroshima Japan

Mechanically aligned total knee arthroplasty (TKA) for valgus knee is considered a “challenging surgery.” Recently, the kinematic alignment (KA) method has gained attention. This study aimed to present objective clinical data, such as intraoperative balance assessment and radiographic evaluation of postoperative lower extremity alignment after TKA using the KA method for valgus deformity. Twenty-one TKA knees (mean age, 74 years;2 males, 19 females) with KA for severe valgus deformity (hip-knee-ankle-angle ≥ 10°) performed at our department in the past 3 years were included in this study. Intraoperative gap and balance measurements and postoperative radiographic evaluation were performed. A total arc of range of motion was achieved up to 98% of preoperative values at 3 weeks postoperatively. Intraoperative gap and balance were stable throughout the entire range of motion. In addition, there were no statistically significant differences in either balance or gap values at each flexion angle. KA TKA is a “simple surgery” rather than a “challenging surgery” because additional soft tissue procedures are not required, operative time is short, intraoperative and postoperative balance is very stable, and a good alignment is achieved. This procedure may relieve surgeons of the stress of TKA for valgus deformities.

关键词： Total Knee Arthroplasty Kinematic Alignment Valgus Deformity Calipered Technique

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