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Safety and feasibility of laparoscopic pancreatoduodenectomy

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Hepatobiliary Surgery and Nutrition 2022年第2期11卷 330-332页

作者： nobuhiko Nakagawa Yuichi Nagakawa Shingo Kozono Department of Gastrointestinal and Pediatric Surgery Tokyo Medical UniversityTokyoJapan

Laparoscopic pancreaticoduodenectomy(LPD)has been safely performed by experts with favorable surgical outcomes.However,the feasibility of LPD remains controversial.LPD is generally considered a challenging operation that requires advanced laparoscopic techniques.In particular,pancreatic reconstruction can be safely performed by only laparoscopic experts.Thus,guidelines created by LPD experts are valuable in indicating the future direction of LPD.Qin et al.developed practical guidelines regarding the safety and feasibility of LPD with 28 international experts from eight countries(1).To create these guidelines,the first summit on minimally invasive pancreatico-biliary surgery was held in Wuhan,China,to promote the development of LPD.Based on a systematic literature review and expert opinions,16 statements were created by the experts.These statements provide useful guidelines not only for surgical trainees who will attempt LPD but also for specialized surgeons.This expert consensus will contribute to the safe implementation of LPDs in the future.

关键词： laparoscopic specialized safely

Changes over time in milk test results following pancreatectomy

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World Journal of Gastrointestinal Surgery 2016年第3期8卷 246-251页

作者： Hideki Aoki Masashi Utsumi Kenta Sui nobuhiko kanaya Tomoyoshi Kunitomo Hitoshi Takeuchi Norihisa Takakura Shigehiro Shiozaki Hiroyoshi Matsukawa Department of Surgery Iwakuni Clinical Center Department of Surgery Fukuyama City Hospital Department of Surgery Hiroshima City Hospital

AIM: To investigate changes over time in, and effects of sealing technology on, milk test results following pancreatectomy. METHODS: From April 2008 to October 2013, 66 pancreatic resections were performed at the Iwakuni Clinical Center. The milk test has been routinely conducted at the institute whenever possible during pancreatectomy. The milk test comprises the following procedure: A nasogastric tube is inserted until the third portion of the duodenum, followed by injection of 100 mL of milk through the tube. If a chyle leak is present, the patient tests positive in this milk test based on the observation of a white milky discharge. Positive milk test rates, leakage sites, and chylous ascites incidence were examined. Liga Sure?(LS; Covidien, Dublin, Ireland), a vessel-sealing device, is routinely used in pancreatectomy. Positive milk test rates before and after use of LS, as well as drain discharge volume at the 2^(nd) and 3^(rd) postoperative days, were compared retrospectively. Finally, positive milk test rates and chylous ascites incidence were compared with the results of a previous report.RESULTS: Fifty-nine milk tests were conducted during pancreatectomy. The positive milk test rate for all pancreatectomy cases was 13.6%(8 of 59 cases). One case developed postoperative chylous ascites(2.1% among the pancreatoduedenectomy cases and 1.7% among all pancreatectomies). Positive rates by procedure were 12.8% for pancreatoduodenectomy and 22.2% for distal pancreatectomy. Positive rates by disease were 17.9% for pancreatic and 5.9% for biliary diseases. When comparing results from before and after use of LS, positive milk test rates in pancreatoduodenectomy were 13.0% before and 12.5% after, while those in distal pancreatectomy were 33.3% and 0%. Drainage volume tended to decrease when LS was used on the 3^(rd) postoperative day(volumes were 424 ± 303 mL before LS and 285 ± 185 mL after, P = 0.056). Both chylous ascites incidence and positive milk test rates decreased slightly compared with those rates from the

关键词： Chylous ascites Milk test Pancreatectomy Surgical energy device Drain discharge

Circuits and devices for standalone large-scale integration (LSI) chips and Internet of Things (IoT) applications: a review

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Chip 2023年第3期2卷 7-19页

作者： Takaya Sugiura Kenta Yamamura Yuta Watanabe Shiun Yamakiri nobuhiko Nakano Department of Electronics and Electrical Engineering Keio UniversityYoko-hamaKanawaga223-8522Japan

In recent years,Internet of Things(IoT)has become more and more important owing to the rapid expansion of the number of computing devices and data sizes.The evolution of IoT requires low-power and self-operating devices to expand the coverage area of computing re-sources.The main components of IoT are the large-scale integration(LSI)chips,which take the function of implementing the energy har-vesters,control units and applications.They exhibit different physics or phenomena,making it difficult to understand and design the entire system.The current work reviews the various methods for IoT appli-cations by CMOS LSI chips,from the power components by energy harvesting to realistic applications with future outlooks.

关键词： Analog LSI Energy har vesting Inter net of Things Sensors

Active Control of Fan Noise

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Journal of Thermal Science 2008年第2期17卷 163-169页

作者： nobuhiko YAMASAKI Hirotoshi TAJIMA Department of Aeronautics and Astronautics Kyushu University

在醒来转子相互作用扇子噪音，很多在传递频率(BPF ) 和它的泛音的片的交往的模式被产生它被定子和转子片等等的数字规定。在现在的学习，主导的模式被试试被第二等的声音从扬声器致动器压制。现在的系统的新奇特征之一是有领域可编程... 详细信息

在醒来转子相互作用扇子噪音，很多在传递频率(BPF ) 和它的泛音的片的交往的模式被产生它被定子和转子片等等的数字规定。在现在的学习，主导的模式被试试被第二等的声音从扬声器致动器压制。现在的系统的新奇特征之一是有领域可编程的门数组(FPGA ) 硬件和 LabVIEW 软件的控制板的采纳同步有在任意的扇子下面的旋转的片的相对地点的环绕地安装的扬声器致动器旋转速度。实验在 2004， 3150，和 4002 的三旋转速度的条件下面被进行[rpm ] 。在健全压力水平(系统程序设计语言) 的减小为所有三旋转速度被观察。在 BPF 的健全压力水平被减少约 13 [dB ] 为 2004 [rpm ] 大小写。

关键词：定子-转子系统技术性能抗噪音控制系统切割技术

Numerical Simulation for Fan Broadband Noise Prediction

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Journal of Thermal Science 2011年第1期20卷 58-63页

作者： Takaaki Hase nobuhiko Yamasaki Tsutomu Ooishi Kyushu University Fukuoka819-0395Japan IHI Corporation Nishitama-gunTokyo190-1297Japan

In order to elucidate the broadband noise of fan,the numerical simulation of fan operating at two different rotational speeds is carried out using the three-dimensional unsteady Reynolds-averaged Navier-Stokes (URANS) equations.The computed results are compared to experiment to estimate its accuracy and are found to show good agreement with experiment.A method is proposed to evaluate the turbulent kinetic energy in the framework of the Spalart-Allmaras one equation turbulence model.From the calculation results,the turbulent kinetic energy is visualized as the turbulence of the flow which leads to generate the broadband noise,and its noise sources are identified.

关键词：宽带噪声数值模拟噪声预测湍流动能 Stokes 计算结果实验发现噪声源识别

Supersonic gas jet stabilization in laser–plasma acceleration

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High Power Laser Science and Engineering 2023年第6期11卷 256-263页

作者： Zhen-Zhe Lei Yan-Jun Gu Zhan Jin Shingo Sato Alexei Zhidkov Alexandre Rondepierre Kai Huang nobuhiko Nakanii Izuru Daito Masakai Kando Tomonao Hosokai SANKEN(Institute of Scientific and Industrial Research) Osaka UniversityIbarakiOsakaJapan Kansai Institute for Photon Science(KPSI) National Institutes for Quantum Science and Technology(QST)Kizugawa-cityKyotoJapan RIKEN SPring-8 Center SayoHyogoJapan

Supersonic gas jets generated via a conical nozzle are widely applied in the laser wakefield acceleration of electrons.The stability of the gas jet is critical to the electron injection and the reproducibility of the wakefield acceleration.Here we discussed the role of the stilling chamber in a modified converging-diverging nozzle to dissipate the turbulence and to stabilize the gas jets.By the fluid dynamics simulations and the Mach-Zehnder interferometer measurements,the instability originating from the nonlinear turbulence is studied and the mechanism to suppress the instability is proposed.Both the numerical and experimental results prove that the carefully designed nozzle with a stilling chamber is able to reduce the perturbation by more than 10% compared with a simple-conical nozzle.

关键词： shock injection hydrodynamic stability laser wakefield acceleration laser-plasma interaction

Large Eddy Simulation of Methane Non-premixed Flame Using the Laminar Flamelet Model

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Journal of Thermal Science 2011年第6期20卷 534-542页

作者： Mari Mitani Yuta Ito nobuhiko Yamasaki Department of Aeronautics and Astronautics Kyushu University

The large eddy simulation (LES) using the steady laminar flamelet model is applied to a simple turbulent jet flame with 33.2% H2,22.1% CH4 and 44.7% N2 at the Reynolds number of 15,200 in order to validate the numerical methods and to investigate the flame structure.For the validation,the detailed experimental data of DLR-A flame is used.The numerical results are in reasonable agreement with experimental results except mass fractions of minor species.In the flow field,the break-down of the potential core,the vortex structure and the mixing intensity are well captured.In the combustion field,mass fractions of major species (H2O,CO2,CO) are well predicted quantitatively.Minor species are well predicted qualitatively.In the present study,the simulations conducted on the Cartesian and cylindrical grids with approximately 6.6× 10 5 nodes are compared.

关键词：小火焰模型大涡模拟预混火焰层流甲烷数值方法数据验证质量分数

Large Eddy Simulation of Swirling Jet in a Bluff-Body Burner

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Journal of Thermal Science 2005年第1期14卷 28-33页

作者： Yohei FUJIMOTO Yuzo INOKUCHI nobuhiko YAMASAKI Department of Aeronautics and Astronautics Kyushu-University 6-10-1HakozakiHigashikuFukuoka812-8581JapanDepartment of Aeronautics and Astronautics Kyushu-University 6-10-1HakozakiHigashikuFukuoka812-8581JapanDepartment of Aeronautics and Astronautics Kyushu-University 6-10-1HakozakiHigashikuFukuoka812-8581Japan

The large eddy simulation (LES) is applied to an unconfined swirling flow of an air surrounding a bluff-body having a central jet of air, and the complicated flowfield that involves the recirculation and vortex breakdown is investigated. The Smagorinsky model is used as the sub-grid scale model. The results of the present numerical simulation are compared with the experimental data of the mean and stochastic root mean square (RMS) variations of two velocity components. Although the inflow conditions are specified in a simple manner, the obtained numerical results are in reasonable agreement with the experiments, except for a part of RMS variation values near downstream of the bluff body. The present numerical calculations can successfully reproduce the two characteristics of the flow, i.e., an upstream recirculation zone established just downstream of the burner plane and the additional recirculation zone established at the more downstream location.

关键词：旋涡射流非流线体旋转仿真数字模型

Semi-polar GaN LEDs on Si substrate

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Science China(Technological Sciences) 2011年第1期54卷 38-41页

作者： nobuhiko SAWAKI Yoshio HONDA Department of Electrical and Electronic Engineering Aichi Institute of Technology Department of Electronics and Akasaki Research Center Nagoya University

Growth of semi-polar (1-101)GaN has been attempted on a patterned (001) silicon substrate adopting selective area MOVPE. The growth was initiated on (111) facets of the Si,which had been prepared by anisotropy etching in a KOH solution. A uniform semi-polar layer was achieved by coalescence of stripes. Since the growth was performed on facets,the surface was atomically flat in AFM surface analyses. By using a high temperature grown AlN nucleation layer,we achieved low threading dislocation density at the top most surface. Moreover,by tilting the c-axis of the GaN on the Si substrate,the effect of the thermal expansion coefficient mismatch was much reduced. As the result,we achieved a crack free (1-101)GaN template on (001)Si. On the thus prepared (1-101)GaN,a GaInN/GaN LED was fabricated,which showed excellent performance with weak quantum confined Stark effect.

关键词：氮化镓发光二极管 Si衬底半极性 LED 量子约束斯塔克效应原子力显微镜氢氧化钾溶液表面分析