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Hyperacute experimental model of rat lung transplantation using a coronary shunt cannula

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World Journal of Transplantation 2024年第2期14卷 155-161页

作者： Munehisa Takata Yusuke Tanaka Daisuke Saito Shuhei Yoshida Isao matsumoto Department of Thoracic Surgery Kanazawa UniversityKanazawa 920-8641IshikawaJapan

BACKGROUND Lung transplantation is a well-established treatment of end-stage lung disease.A rodent model is an inexpensive way to collect biological data from a living model after lung ***,mastering the surgical technique takes time owing to the small organ *** To conduct rat lung transplantation using a shunt cannula(SC)or modified cannula(MC)and assess their *** Rat lung transplantation was performed in 11 animals in the SC group and 12 in the MC *** devised a method of rat lung transplantation using a coronary SC for coronary artery bypass surgery as an anastomosis of pulmonary arteri-ovenous vessels and *** same surgeon performed all surgical proce-dures in the donor and recipient rats without using a magnifying *** success rate of lung transplantation,operating time,and PaO2 values were com-pared after 2-h reperfusion after *** Ten and 12 lungs were successfully transplanted in the SC and MC groups,*** the SC group,one animal had cardiac arrest within 1 h after reperfusion owing to bleeding during pulmonary vein *** opera-ting time for the removal of the heart-lung block from the donor and preparation of the left lung graft was 26.8±2.3 and 25.7±1.3 min in the SC and MC groups,respectively(P=0.21).The time required for left lung transplantation in the recipients was 37.5±2.8 min and 35.9±1.4 min in the SC and MC groups,respectively(P=0.12).PaO2 values at 2 h after reperfusion were 456.2±25.5 and INTRODUCTION Lung transplantation is a well-established treatment of end-stage lung *** immune and non-immune mech-anisms in lung transplantation are highly complex,and post-transplant complications such as infections and primary and chronic lung allograft dysfunction must be reduced to improve ***,there is a need for immunological and pathophysiological analyses using animal lung transplantation *** rat lung transplantation model was f

关键词： Lung transplantation Rat Shunt cannula Modified cannula Reperfusion

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

Evaluation of temperature dependent vortex pinning properties in strongly pinned YBa_(2)Cu_(3)O_(7-δ)thin films with Y_(2)BaCuO_(5)nanoinclusions

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Superconductivity 2024年第1期9卷 95-105页

作者： Alok K.Jha Kaname matsumoto Tomoya Horide Shrikant Saini Ataru Ichinose Paolo Mele Yutaka Yoshida Satoshi Awaji Department of Materials Science and Engineering Kyushu Institute of TechnologyTobata-kuKitakyushu 804-8550Japan Department of Mechanical and Control Engineering Kyushu Institute of TechnologyTobata-kuKitakyushu 804-8550Japan Central Research Institute of Electrical Power Industry YokosukaKanagawa 240-0196Japan College of Engineering-Innovative Global Program Shibaura Institute of TechnologyMinuma-kuSaitama 337-8570Japan Department of Energy Engineering and Science Nagoya UniversityChikusa-kuNagoya 464-8603Japan Institute for Materials Research Tohoku UniversityAoba-kuSendai 980-8577Japan

The pinning of quantized magnetic vortices in superconducting YBa_(2)Cu_(3)O_(7-δ)(YBCO or Y123)thin films with Y_(2)BaCuO_(5)(Y211)nanoinclusions have been investigated over wide temperature range(4.2-77 K).The concentration of Y211 nanoinclusions has been systematically varied inside YBCO thin films prepared by laser ablation technique using surface modified target *** pinning force density values(Fp∼0.5 TNm^(−3)at 4.2 K,9 T)have been observed for the YBCO film with moderate concentration of Y211 nanoinclusions(3.6 area%on ablation target).In addition,uniform enhancement in critical current density(J_(c))was observed in the angular dependent J_(c)measurement of YBCO+Y211 nanocomposite films.Y211 nanoinclusions have been found to be very efficient in pinning the quantized vortices thereby enhancing the in‐field J_(c)values over a wide range of *** the concentration of Y211 secondary phase into Y123 film matrix results into agglomeration of Y211 phase and observed as increased Y211 nanoparticle *** larger secondary phase nanoparticles are not as efficient pinning centers at lower temperatures as they are at higher temperatures due to substantial reduction of the coherence length at lower *** of the temperature dependence of J_(c)for YBCO+Y211 nanocomposite films has been conducted and possible vortex pinning mechanism in these nanocomposite films has been discussed.

关键词： YBCO thin film Critical current Vortex pinning Nanoscale APCs

Superconducting joints using reacted multifilament MgB_(2)wires:A technology toward cryogen-free MRI magnets

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Journal of Magnesium and Alloys 2024年第1期12卷 159-170页

作者： Dipak Patel Akiyoshi matsumoto Hiroaki Kumakura Yuka Hara Toru Hara Minoru Maeda Hao Liang Yusuke Yamauchi Seyong Choi Jung Ho Kim Md Shahriar A.Hossain School of Mechanical and Mining Engineering The University of QueenslandSt LuciaQueensland 4072Australia National Institute for Materials Science(NIMS) 1-2-1 SengenTsukubaIbaraki 305-0047Japan Department of Electrical Engineering and Kangwon High Magnetic Field Center Institute of Quantum Convergence TechnologyKangwon National UniversityGangwon 24341Republic of Korea Australian Institute for Bioengineering and Nanotechnology(AIBN) The University of QueenslandSt LuciaQueensland 4072Australia Department of Materials Process Engineering Graduate School of EngineeringNagoya UniversityNagoyaAichi 464-8603Japan Institute for Superconducting and Electronic Materials Australian Institute for Innovative MaterialsUniversity of WollongongNorth WollongongNew South Wales 2500Australia

The development of superconducting joining technology for reacted magnesium diboride(MgB_(2))conductors remains a critical challenge for the advancement of cryogen-free MgB_(2)-based magnets for magnetic resonance imaging(MRI).Herein,the fabrication of superconducting joints using reacted carbon-doped multifilament MgB_(2)wires for MRI magnets is *** achieve successful superconducting joints,the powder-in-mold method was employed,which involved tuning the filament protection mechanism,the powder compaction pressure,and the heat treatment *** fabricated joints demonstrated clear superconducting-to-normal transitions in self-field,with effective magnetic field screening up to 0.5 T at 20 *** evaluate the interface between one of the MgB_(2)filaments and the MgB_(2)bulk within the joint,serial sectioning was conducted for the first time in this type of superconducting *** serial sectioning revealed space formation at the interface,potentially caused by the volume shrinkage associated with the MgB_(2)formation or the combined effect of the volume shrinkage and the different thermal expansion coefficients of the MgB_(2)bulk,the filament,the mold,and the sealing *** findings are expected to be pivotal in developing MgB_(2)superconducting joining technology for MRI magnet applications through interface engineering.

关键词： Mg B2 superconducting joint MgB_(2)conductor MRI applications Cryogen-free magnet Persistent-mode operation

Report for Type 2 Bayes-Fuzzy Estimation in No-Data Problem

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Applied Mathematics 2024年第1期15卷 46-50页

作者： Houju Hori Jr. Kazuhisa Takemura Yukio matsumoto Nara Cmmunity Tsubakikishi Shrine Nara Japan Department of Psychology Waseda University Tokyo Japan The Institute of Mathematical Statistics Tachikawa Japan

It is well known that the system (1 + 1) can be unequal to 2, because this system has both observation error and system error. Furthermore, we must provide our mustered service within our cool head and warm heart, where two states of nature are existing upon us. Any system is regarded as the two-dimensional variable error model. On the other hand, we consider that the fuzziness is existing in this system. Though we can usually obtain the fuzzy number from the possibility theory, it is not fuzzy but possibility, because the possibility function is as same as the likelihood function, and we can obtain the possibility measure by the maximal likelihood method (i.e. max product method proposed by Dr. Hideo Tanaka). Therefore, Fuzzy is regarded as the only one case according to Vague, which has both some state of nature in this world and another state of nature in the other world. Here, we can consider that Type 1 Vague Event in other world can be obtained by mapping and translating from Type 1 fuzzy Event in this world. We named this estimation as Type 1 Bayes-Fuzzy Estimation. When the Vague Events were abnormal (ex. under War), we need to consider that another world could exist around other world. In this case, we call it Type 2 Bayes-Fuzzy Estimation. Where Hori et al. constructed the stochastic different equation upon Type 1 Vague Events, along with the general following probabilistic introduction method from the single regression model, multi-regression model, AR model, Markov (decision) process, to the stochastic different equation. Furthermore, we showed that the system theory approach is Possibility Markov Process, and that the making decision approach is Sequential Bayes Estimation, too. After all, Type 1 Bays-Fuzzy estimation is the special case in Bayes estimation, because the pareto solutions can exist in two stochastic different equations upon Type 2 Vague Events, after we ignore one equation each other (note that this is Type 1 case), we can obtain both its

关键词： Bayes-Fuzzy Estimation Possibility Markov Process Possibility Reserved Judgement

A topology optimization for finite 1D phononic structures with objective function involving tangential derivative quantities using TDBIE

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Acta Mechanica Sinica 2024年第7期40卷 122-136页

作者： Haifeng Gao Jianguo Liang Jianglin Liu Yinhui Li Haojie Lian Toshiro matsumoto College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030000China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030000China College of Electronic Information and Optical Engineering Taiyuan University of TechnologyTaiyuan 030000China Key Laboratory of In-situ Property-improving Mining of Ministry of Education Taiyuan University of TechnologyTaiyuan 030000China Department of Mechanical System Nagoya UniversityNagoya 464-8604Japan

The paper proposes a topology optimization method for 1D phononic structures to minimize the tangential component of particle velocity at the objective *** tangential derivative of the boundary integral equation(TDBIE)is employed for the evaluation of the objective function involves the tangential derivative *** topological derivative is derived through the adjoint method and the Neumann boundary condition of the adjoint field is obtained using the *** average topological derivative which is obtained by calculating the average value of the topological derivative in each layer of design domains,is employed for the updating of the level set *** implementations demonstrate the proposed method is effective for the design of the 1D phononic crystals with the objective function involving tangential derivative quantities.

关键词： Boundary element method Topology optimization Phononic structures Tangential derivative

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

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

Endoscopic submucosal dissection for stomach neoplasms

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World Journal of Gastroenterology 2006年第32期12卷 5108-5112页

作者： mitsuhiro Fujishiro Department of Gastroenterology Graduate School of Medicine University of Tokyo7-3-1HongoBunkyokuTokyoJapan

Recent advances in techniques of therapeutic endoscopy for stomach neoplasms are rapidly achieved. One of the major topics in this field is endoscopic submucosal dissection （ESD）. ESD is a new endoscopic technique using cutting devices to remove the tumor by the following three steps： injecting fluid into the submucosa to elevate the tumor from the muscle layer, pre-cutting the surrounding mucosa of the tumor, and dissecting the connective tissue of the submucosa beneath the tumor. So the tumors are resectable in an en bloc fashion, regardless of the size, shape, coexisting ulcer, and location. Indication for ESD is strictly confined by two aspects： the possibility of nodal metastases and technical difficulty, which depends on the operators. Although long-term outcome data are still lacking, short-term outcomes of ESD are extremely favourable and laparotomy with gastrectomy is replaced with ESD in some parts of therapeutic strategy for early gastric cancer.

关键词： Therapeutic endoscopy Endoscopicsubmucosal dissection Stomach neoplasia Early cancer Node-negative tumor