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Accurate Extraction of Effective Gate Resistance in RF MOSFET

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Circuits and Systems 2015年第5期6卷 143-151页

作者： Ikkyun Jo toshimasa matsuoka Graduate School of Engineering Osaka University Osaka Japan

This paper describes the gate electrode resistance of MOSFET and non-quasi-static (NQS) effect for RF operation. The vertical current paths between the silicide layer and poly-silicon are considered in the gate electrode. The vertical current paths are not effective in long-channel devices, but become more significant in short-channel devices. The gate resistance including vertical current paths can reproduce the practical RF characteristics well. By careful separation of the above gate electrode resistance and the NQS effect, the small-signal gate-source admittance can be analyzed with 130-nm CMOS process. Elmore constant (κ) of the NQS gate-source resistance is about five for long-channel devices, while it decreases down to about three for short-channel devices.

关键词： MOSFET NQS Effect Gate Electrode Resistance Elmore Constant

Deciphering the enigmatic spikelet traits:Resolving trade-offs for enhancing rice yield

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Molecular Plant 2024年第5期17卷 694-695页

作者： Hideki Yoshida Makoto matsuoka Institute of Fermentation Sciences Fukushima UniversityFukushima 960-1248Japan

Increasing the yield is one of the most important goals of crop *** the beginning of rice cultivation thousands of years ago,many efforts have been made to increase rice *** of the successes in this history was the Green *** tremendous improvement in the 1960s was achieved by increasing rice and wheat production through the development and widespread adoption of semi-dwarf varieties with the extensive use of fertilizers(Hedden,2003).Dwarfism in crops lowers the center of gravity of the plant body,reducing the risk of lodging and enabling farmers to use more fertilizer to increase ***-dwarf mutations in both rice and wheat created during the Green Revolution are related to the plant growth hormone gibberellin(GA).Although other mechanisms cause dwarf mutants,only GA-related semi-dwarf mutants were selected during the Green Revolution(Wang et al.,2021).While GA-related abnormalities only make plants shorter,most cases caused by other mechanisms involve not only dwarfism but also other morphological abnormalities.

关键词： dwarf crops traits

A Subthreshold Low-Voltage Low-Phase-Noise CMOS LC-VCO with Resistive Biasing

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Circuits and Systems 2015年第5期6卷 136-142页

作者： Jungnam Bae Saichandrateja Radhapuram Ikkyun Jo Takao Kihara toshimasa matsuoka Graduate School of Engineering Osaka University Osaka Japan Faculty of Engineering Osaka Institute of Technology Osaka Japan

This paper presents a low-phase-noise LC voltage-controlled oscillator (LC-VCO) with top resistive biasing in subthreshold region. The subthreshold LC-VCO has low-power and low-phase-noise due to its high transconductance efficiency and low gate bias condition. The top resistive biasing has more benefit with the feature of phase noise than MOS current source since it can support the low-noise characteristics and large output swing. The LC-VCO designed in 130-nm CMOS process with 0.7-V supply voltage achieves phase noise of -116 dBc/Hz at 200 kHz offset with tuning range of 398 MHz to 408 MHz covering medical implant communication service (MICS) band.

关键词： VCO Resistive Biasing Current Source CMOS Integrated Circuit Phase Noise MICS Band

Generation of brain vascular heterogeneity:recent advances from the perspective of angiogenesis

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Neural Regeneration Research 2025年第7期20卷 2013-2014页

作者： Nathanael J.Lee Ryota L.matsuoka Department of Neurosciences Lerner Research InstituteCleveland ClinicClevelandOHUSA Department of Molecular Medicine Cleveland Clinic Lerner College of MedicineCase Western Reserve UniversityClevelandOHUSA

Heterogeneous proper t i es of vascular endothelial cells in the brain:The brain displays large energy dynamics and consumption,and this high level of metabolic demands is fulfilled by a continuous supply of glucose and oxygen through its vascular *** vasculature consists of highly divergent blood vessel branches,giving rise to a dense network of capillaries that supply blood to all cells across the *** elaborated vascular network is thought to develop via angiogenesis,a process in which new blood vessels grow from pre-existing *** capillaries exhibit organotypic features distinct from other tissues and are formed primarily by two major endothelial cell(EC)types:those that form the semi-permeable blood-brain barrier(BBB)and those that develop highly permeable pores known as fenestrae(matsuoka et al.,2022).The structural and functional differences between BBB and fenestrated vascular ECs represent a fundamental feature of brain vasculature and form the foundation for both brain function and homeostasis.

关键词： angiogenesis homeostasis network

Novel biomarkers for early detection of gastric cancer

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World Journal of Gastroenterology 2023年第17期29卷 2515-2533页

作者： Tasuku matsuoka Masakazu Yashiro Molecular Oncology and Therapeutics Osaka Metropolitan University Graduate School of MedicineOsaka 5458585Japan

Gastric cancer(GC)remains a leading cause of cancer-related death *** than half of GC cases are diagnosed at an advanced stage due to its lack of early *** is a heterogeneous disease associated with a number of genetic and somatic *** detection and effective monitoring of tumor progression are essential for reducing GC disease burden and *** current widespread use of semi-invasive endoscopic methods and radiologic approaches has increased the number of treatable cancers:However,these approaches are invasive,costly,and ***,novel molecular noninvasive tests that detect GC alterations seem to be more sensitive and specific compared to the current *** technological advances have enabled the detection of blood-based biomarkers that could be used as diagnostic indicators and for monitoring postsurgical minimal residual *** biomarkers include circulating DNA,RNA,extracellular vesicles,and proteins,and their clinical applications are currently being *** identification of ideal diagnostic markers for GC that have high sensitivity and specificity would improve survival rates and contribute to the advancement of precision *** review provides an overview of current topics regarding the novel,recently developed diagnostic markers for GC.

关键词： Gastric cancer Diagnostic biomarkers Early detection Liquid biopsy

Prediction of return of spontaneous circulation in outof-hospital cardiac arrest with non-shockable initial rhythm using point-of-care testing: a retrospective observational study

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World Journal of Emergency Medicine 2023年第2期14卷 89-95页

作者： Kota Shinada Hiroyuki Koami Ayaka matsuoka Yuichiro Sakamoto Department of Emergency and Critical Care Medicine Faculty of MedicineSaga UniversitySaga CitySaga Prefecture 849-8501Japan Division of Translational Research in Intensive Care Medicine Faculty of MedicineSaga UniversitySaga CitySaga Prefecture 849-8501Japan

BACKGROUND:Out-of-hospital cardiac arrest(OHCA) is a public health concern, and many studies have been conducted on return of spontaneous circulation(ROSC) and its prognostic *** thromboelastometry(ROTEM?), a point-of-care testing(POCT) method, has been useful for predicting ROSC in patients with OHCA, but very few studies have focused on patients with non-shockable rhythm. We examined whether the parameters of POCT could predict ROSC in patients with OHCA and accompanying non-shockable ***:This is a single-center, retrospective observational study. Complete blood count,blood gas, and ROTEM POCT measurements were used. This study included patients with nontraumatic OHCA aged 18 years or older who were transported to the emergency department and evaluated using POCT between January 2013 and December 2021. The patients were divided into the ROSC and non-ROSC groups. Prehospital information and POCT parameters were compared using receiver operating characteristic(ROC) curve analysis, and further logistic regression analysis was ***:Sixty-seven and 135 patients were in the ROSC and non-ROSC groups,respectively. The ROC curves showed a high area under the curve(AUC) for K^(+) of 0.77(95%confidence interval [CI]:0.71–0.83) and EXTEM amplitude 5 min after clotting time(A5) of 0.70(95%CI:0.62–0.77). The odds ratios for ROSC were as follows:female sex 3.67(95%CI:1.67–8.04);K^(+)0.64(95%CI:0.48–0.84);and EXTEM A5 1.03(95%CI:1.01–1.06).CONCLUSION:In OHCA patients with non-shockable rhythm, K^(+) level and the ROTEM parameter EXTEM A5 may be useful in predicting ROSC.

关键词： Rotational thromboelastometry Blood coagulation disorders Extrinsic pathway Potassium

Effect of multifunction cavitation using phosphoric acid on fatigue and surface properties of AZ31 magnesium alloy

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镁合金学报(英文) 2023年第6期11卷 1996-2005页

作者： Shunta matsuoka Fumihiro Kato Toshihiko Yoshimura Masataka Ijiri Shoichi Kikuchi Graduate School of Integrated Science and Technology Shizuoka University3-5-1 JohokuNaka-kuHamamatsuShizuoka432-8561Japan Department of Mechanical Engineering Sanyo-Onoda City University1-1-1 Daigaku-DoriSanyo-OnodaYamaguchi 756-0884Japan Tokyo Metropolitan University 1-1 Minami-OsawaHachiojiTokyo 192-0397Japan Department of Mechanical Engineering Faculty of EngineeringShizuoka University3-5-1 JohokuNaka-kuHamamatsu-shiShizuoka 432-8561Japan

Magnesium alloy is attractive for lightweight construction but often suffers from poor corrosion resistance and low *** processing with chemicals,i.e.,multifunction cavitation(MFC),was introduced to form a high-corrosion film and improve the fatigue properties of an AZ31 magnesium *** analysis and plane bending fatigue tests were conducted for the MFC-treated magnesium alloy at a stress ratio,R,*** mechanical action of cavitation bubbles improved the fatigue life of magnesium alloys due to increasing the surface hardness and generating compressive residual ***,the combined mechanical and electrochemical action during MFC formed pits on the *** pits were large enough to easily nucleate an initial fatigue *** addition,the magnesium alloys without pit formation,for which a coating process using phosphoric acid was conducted after MFC using water,showed superior fatigue properties.

关键词： Magnesium alloy Multifunction cavitation Surface modification Fatigue Residual stress

Resampling in neural networks with application to spatial analysis

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Geo-Spatial Information Science 2022年第3期25卷 413-424页

作者： Bruno Póvoa Rodrigues Vinicius Francisco Rofatto Marcelo Tomio matsuoka Talita Teles Assunção Graduate Program in Agriculture and Geospatial Information Federal University of UberlândiaMonte CarmeloBrazil Institute of Geography Federal University of UberlândiaMonte CarmeloBrazil

In developing Artificial Neural Networks(ANNs),the available dataset is split into three categories:training,validation and ***,an important problem arises:How to trust the predic-tion provided by a particular ANN?Due to the randomness related to the network itself(architecture,initialization and learning procedure),there is usually no best *** this issue,we provide a framework,which captures the randomness related to the network *** idea is to perform several training and test trials based on the Jackknife resampling *** consists of iteratively deleting a single observation each time from the sample and recomputing the ANN on the rest of the sample ***,interval prediction is available instead of point *** proposed method was applied and tested using pH,Ca and P data obtained by analyzing 118 georeferenced soil *** results,based on the dataset size simulation,showed that 60%reduction in available dataset offers compatible accuracy in relation to full dataset,and therefore a higher cost of sampling in the field would not be *** re-sampling method spatially characterizes the points of greater or lesser accuracy and *** re-sampling method increased the success rate by using interval prediction instead of using the mean as the most probable *** we restrict it to the regression neural network model,the resampling method proposed can also be extended to other modern statistical tools,such as Kriging,Least Squares Collocation(LSC),Convolutional Neural Network(CNN),and so on.

关键词： Artificial Neural Network(ANN) data splitting resampling delete-1 Jackknife spatial analysis

Extraction,classification and visualization of 3-dimensional clouds simulated by cloud-resolving atmospheric model

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International Journal of Modeling, Simulation, and Scientific Computing 2017年第4期8卷 190-204页

作者： Daisuke matsuoka Center for Earth Information Science and Technology(CEIST)Japan Agency for Marine-Earth Science and Technology(JAMSTEC)3173-25 Showa-Machi Kanazawa-kuYokohama 236-0001Japan

Cloud-resolving atmospheric general circulation models using large-scale supercomputers reproduce realistic behavior of 3-dimensional atmospheric field on a global *** understand the simulation result for scientists,conventional visualization methods based on 2-dimensional cloud classification are not enough for understanding individual clouds and their physical *** this study,we propose a new 3-dimensional extraction and classification method of simulated clouds based on their 3-dimensional shape and physical *** proposed method extracts individual clouds by cloud water and cloud ice,and classifies them into six types by their altitude and upward *** applied the method to time-varying atmospheric simulation data,and attempted to visualize atmospheric phenomena on the tropics such as developing cumulonimbus and tropical *** case studies clearly visualize the behavior of individual cloud type and clarify that some cloud types have a relationship with rainfall during active weather *** proposed method has the potential to analyze such phenomena that develop in the vertical direction as well as the horizontal direction.

关键词： Atmospheric simulation cloud visualization