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Unfamiliar waveforms spanning from the ST to TP segments only observed in certain limb leads of the standard 12-lead electrocardiogram due to Aslanger’ s sign

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老年心脏病学杂志:英文版 2023年第9期20卷 693-696页

作者： Koji Takahashi Nobuhisa Yamamura Mako Yoshino Daijiro Enomoto Hiroe Morioka Shigeki Uemura Takafumi Okura Tomoki Sakaue Shuntaro Ikeda Department of Community Emergency Medicine Ehime University Graduate School of MedicineEhimeJapan Department of Cardiology Yawatahama City General HospitalEhimeJapan Department of Clinical Pathology Yawatahama City General HospitalEhimeJapan

Aslanger’s sign,also known as the arterial pulse tapping artifact or electromechanical association artifact,is an electrocardiographic artifact caused by arterial pulsation at the site where the limb leads of the standard 12-lead electrocardiogram near the radial or posterior tibial arteries are positioned,particularly in hyperdynamic states.[1–8]It occurs in every cardiac cycle with a constant coupling interval between the QRS complex and artifact.This synchronization with the underlying heart rhythm makes it less likely to be recognized as an artifact compared to unsynchronized artifacts,such as those caused by limb movement and inadequate contact between the electrode and skin.[1,2,7,8]Almost all reported cases of Aslanger’s sign exhibit an unusual waveform morphology in all 12 leads except one of the standard 12-lead electrocardiogram.This sign is often confused with an electrocardiographic finding commonly observed during acute coronary events.

关键词： electrocardiogram arterial likely

Dissecting pathophysiology of a human dominantly inherited disease, familial amyloidotic polyneuropathy, by using genetically engineered mice

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Frigid Zone Medicine 2022年第2期2卷 65-75页

作者： Zhenghua Li Kenichi yamamura Department of Histology and Embryology Harbin Medical UniversityHarbin 150081China Institute of Resource Development and Analysis Kumamoto UniversityKumamoto 860-0811Japan TransGenic Inc.Fukuoka 810-0001Japan

Familial amyloidotic polyneuropathy(FAP)is a type of systemic amyloidosis characterized by peripheral and autonomic neuropathy.Although FAP is a typical autosomal dominant disorder caused by a point mutation in the TTR gene,the average age at onset varies significantly among different countries.This discrepancy clearly suggests that a combination of intrinsic factors as well as extrinsic(environmental)factors shapes the development of FAP.However,these factors are difficult to analyze in humans,because detailed pathologic tissue analysis is only possible at autopsy.Thus,mouse models have been produced and used to disentangle these factors.This review covers the mouse models produced thus far and how these models are applied to analyze intrinsic and extrinsic factors involved in disease development and to test drug efficacy.

关键词： amyloid polyneuropathy neuropathy

Polishing and planarization of single crystal diamonds: state-of-the-art and perspectives

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International Journal of Extreme Manufacturing 2021年第2期3卷 45-87页

作者： Hu Luo Khan Muhammad Ajmal Wang Liu Kazuya yamamura Hui Deng Department of Mechanical and Energy Engineering Southern University of Science and TechnologyNo.1088Xueyuan RoadShenzhenGuangdong 518055People’s Republic of China 2 Graduate School of EngineeringOsaka University2-1 YamadaokaSuitaOsakaJapan

Diamond is a promising material for the modern industry. It is widely used in different applications, such as cutting tools, optical windows, heat dissipation, and semiconductors.However, these application areas require exceptionally flattened and polished diamond surfaces.Unfortunately, due to the extreme hardness and chemical inertness of diamond, the polishing of diamond is challenging. Since the 1920s, various conventional and modern mechanical,chemical, and thermal polishing techniques have been proposed and developed for finishing diamond surfaces. Therefore, to impart proper guidance on selecting a good polishing technique for production practice, this paper presents an in-depth and informative literature survey of the current research and engineering developments regarding diamond polishing. At first, a brief review of the general developments and basic material removal principles is discussed. This review concludes with a detailed analysis of each techniques' polishing performance and critical challenges, and a discussion of the new insights and future applications of diamond polishing.

关键词： diamond polishing material removal anisotropy ultra-smooth surface chemical reaction surface quality

Actuation and blocking force of stacked nanocarbon polymer actuators

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International Journal of Smart and Nano Materials 2018年第3期9卷 184-198,I0003页

作者： Ken Mukai Masahiro yamamura Junko Kamata Hirosato Monobe Kinji Asaka Inorganic Functional Material Research institute National Institute of Advanced Industrial Science and Technology(AIST)OsakaJapan

We have developed stacked nanocarbon polymer actuators that are composed of several nanocarbon polymer actuator films using nonwoven fabric as insulation layers.The nonwoven fabric prepared through electrospinning methods has extremely-low-density structures,which do not significantly prevent the motions of each nanocarbon actuator layer.Therefore,stacking several thin nanocarbon polymer actuators using nonwoven fabric as insulation layers is expected to increase generated force without decreasing the displacement of a one-layer actuator.We have prepared stacked actuators with one,two,three,four,and seven layers using this method.The displacement and blocking force of these actuators are measured and compared with those of one-layer actuators of different thicknesses.Displacement is weakly dependent on the thickness of the actuator films of the stacked actuators.On the contrary,it decreases considerably as the thickness of the actuator film of the one-layer actuator increases.In both cases,blocking force is proportional to the thickness of actuator films.We have developed a stacked actuator model based on a trilayer actuator model and confirmed the experimental results using the model.

关键词： Nanocarbon actuator polymer stacking model

Endoscopic hemostasis using self-expandable metal stent combinedwith PuraStat® for patient with high risk of post-endoscopicsphincterotomy bleeding (with video)

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Hepatobiliary & Pancreatic Diseases International 2024年第1期23卷 94-96页

作者： Takeshi Ogura Yuki Uba Masahiro yamamura Nobu Nishioka Hiroki Nishikawa 2nd Department of Internal Medicine Osaka Medical and Pharmaceutical UniversityOsakaJapan

To the Editor:Endoscopic sphincterotomy(EST)is an established technique for removal of bile duct stones and self-expandable metal stent(SEMS)deployment.However,bleeding can be considered an adverse event after EST,particularly for patients with high risk of bleeding such as those on hemodialysis.Among the various techniques reported for obtaining endoscopic hemostasis[1-3].

关键词： bleeding stasis endoscopic

The impact of associating liver partition and portal vein ligation for staged hepatectomy(ALPPS)on liver tumors with unusual indications

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Hepatobiliary Surgery and Nutrition 2022年第3期11卷 477-480页

作者： Kensuke yamamura Toru Beppu Tatsunori Miyata Shinichi Akahoshi Takatoshi Ishiko Department of Surgery Yamaga City Medical CenterYamagaJapan Department of Gastroenterological Surgery Graduate School of Life SciencesKumamoto UniversityKumamotoJapan

An associating liver partition and portal vein ligation for staged hepatectomy(ALPPS)has been developed as a novel surgical technique for patients with insufficient future liver remnant volume even after portal vein embolization(PVE)±hepatic arterial or venous embolization or conventional two-stage hepatectomy(TSH)(1-5).ALPPS was thought to be a breakthrough but high-risk procedure;however,it recently became a safer technique after the developing phase(1-3).Conversion surgery is strongly recommended for patients with initially unresectable liver tumors that are deemed resectable by systemic chemotherapy or hepatic arterial chemotherapy/embolization(6,7).The primarily targeted diseases are colorectal liver metastases(CRLM)and hepatocellular carcinoma(HCC).ALPPS is indicated for patients undergoing not only primary surgery but also conversion surgery.

关键词： ALPPS chemotherapy hepatectomy

THE INTERACTION BETWEEN SHOCK WAVES AND SOLID SPHERES ARRAYS IN A SHOCK TUBE

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Acta Mechanica Sinica 2004年第3期20卷 219-227页

作者：施红辉 Kazuki yamamura State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing 100080China College of Mechanical and Automatic Control EngineeringZhejiang University of SciencesXiasha Higher Education ZoneHangzhou 310018China Department of Mechanical Engineering Nagoya Institute of TechnologyGokiso-choShowa-kuNagoya 466-8555Japan

When a shock wave interacts with a group of solid spheres,non-linear aerodynamic behaviors come into effect.The complicated wave reflections such as the Mach reflection occur in the wave propagation process.The wave interactions with vortices behind each sphere's wake cause fluctuation in the pressure profiles of shock waves.This paper reports an experimental study for the aerodynamic processes involved in the interaction between shock waves and solid spheres.A schlieren photography was applied to visualize the various shock waves passing through solid spheres.Pressure measurements were performed along different downstream positions.The experiments were conducted in both rectangular and circular shock tubes.The data with respect to the effect of the sphere array, size,interval distance,incident Mach number,etc.,on the shock wave attenuation were obtained.

关键词： shock wave spheres arrays models schlieren visualization pressure measurement compressible multiphase flow

全膝关节置换术中个性化截骨导板的设计改进提高了胫骨假体在冠状面和轴向平面上的对齐准确性

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中华医学杂志 2022年第1期102卷 20-20页

作者： yamamura K Minoda Y Sugama R 王鑫光(编译) 何宜蓁(编译) 田华(编译) 不详北京大学第三医院骨科

假体安放位置是影响全膝关节置换术(TKA)术后长期临床结果的最重要因素之一。为了改善假体安放位置,近年来基于患者MRI或CT数据的个性化截骨导板(PSI)被用于辅助TKA。但目前对于PSI的准确性仍然存在争议,尤其在胫骨假体安放方面,结论不... 详细信息

假体安放位置是影响全膝关节置换术(TKA)术后长期临床结果的最重要因素之一。为了改善假体安放位置,近年来基于患者MRI或CT数据的个性化截骨导板(PSI)被用于辅助TKA。但目前对于PSI的准确性仍然存在争议,尤其在胫骨假体安放方面,结论不一。在本项研究中,为了提高胫骨假体的安放准确性,对传统的PSI进行了以下3方面的改进:增加了胫骨与PSI之间的接触面积;在PSI上增加旋转定位标记.

关键词：胫骨假体安放位置临床结果全膝关节置换术冠状面定位标记 CT数据 TKA

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