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Global Energy.Interconnection 2022年第2期5卷 192-205页

作者： y.dai tanaka M.Hasanuzzaman Graduate School of Energy.Science Kyoto UniversityYoshida HonmachiSakyoKyoto 606-8501Japan Higher Institution Centre of Excellence(HICoE) UM Power Energy Dedicated Advanced Centre(UMPEDAC)Level 4Wisma R&DUniversity of MalayaJalan Pantai Baharu59990 Kuala LumpurMalaysia

Photocataly.ic methane(CH_(4))production wherein CO_(2)is reduced to CH_(4) by.utilizing solar radiation energy.is gaining research and industrial focus because of its environmental-friendly.*** offers twofold advantages:reduction in CO_(2)emission and production of artificial natural gas(methane)at the same *** this paper,comparative energy.economic and environmental assessment of such photocataly.ic methane production has been carried out between Japan and Malay.ian *** on the photocataly.ic methane production plant and estimation of energy.production,CO_(2)emission reduction,and economic indicators are made based on previous research and existing *** analy.is shows that Malay.ia has a higher potential for energy.production and CO_(2)emission reduction than *** analy.is reveals that the feasible reaction efficiencies of the plant in Japan and Malay.ia are 8%.The slightly.higher conversion efficiency.in Malay.ia is due to the energy.price and CO_(2)*** the implementation of the photocataly.ic methane production plant,the high energy.price and CO_(2)tax will work as a driving force.

关键词： Photocataly.is CO_(2)reduction Photocataly.ic methane production CO_(2)tax

EFFECTS OF UNDERSCOUR DEPTH AND HORIZONTAL SPACING BETWEEN TWO BED PROTECTION BLOCKS ON STABILITy.OF FRONTAL BLOCK

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Journal of Hy.rody.amics 2012年第4期24卷 579-588页

作者： SHAH Prem tanaka Norio y.GISAWA Junji Graduate School of Science and Engineering Saitama University Sakura-ku Saitama-shi Saitama Japan

The stability.of a river-bed protection block in a flood event is affected by.underscouring of the block. The effects of block spacing on block stability.were investigated in different underscour conditions. Three blocks were placed at the bottom in a flume, and the underscour depth of the frontal block and distance between the first and second blocks were changed. Drag and lift forces were measured directly.in each experimental condition. Particle Image Velocimetry.（PIV） was used to visualize the flow and eva- luate the streamline pattern. Pressure measurements around the block to understand the pressure distribution show that the pressure distribution on the rear and bottom surfaces of the block is significantly.affected by.changes in block spacing and underscour depth. The experimental results show that for the same underscour gap, lift, and drag coefficients decreased with increasing space between the two blocks. In addition, if the underscour gap is increased with the same horizontal spacing, the lift coefficient increases and drag coefficient decreases. These results demonstrate that wider spacing enhance stability.of the frontal block in the underscour condition. Moreover, analy.is of block stability.with changing underscouring and horizontal spacing shows that bed protection blocks seem to have more stability.when the gap between two bed protection blocks was equal to height of the blocks.

关键词： bed protection block stability underscouring Particle Image Velocimetry.(PIV)

Recommender sy.tem for discovery.of inorganic compounds

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npj Computational Materials 2022年第1期8卷 2084-2090页

作者： Hiroy.ki Hay.shi Atsuto Seko Isao tanaka Department of Materials Science and Engineering Kyoto UniversityKyotoJapan Nano Research Laboratory Japan Fine Ceramics Center(JFCC)NagoyaJapan

A recommender sy.tem based on experimental databases is useful for the efficient discovery.of inorganic ***,we review studies on the discovery.of as-y.t-unknown compounds using recommender *** first method used compositional descriptors made up of elemental *** compositions registered in the inorganic cry.tal structure database(ICSD)were supplied to machine learning for binary.*** other method did not use any.descriptors,but a tensor decomposition technique was *** predictive performance for currently.unknown chemically.relevant compositions(CRCs)was determined by.examining their presence in other *** to the recommendation,sy.thesis experiments of two pseudo-ternary.compounds with currently.unknown structures were ***,a sy.thesis-condition recommender sy.tem was constructed by.machine learning of a parallel experimental data-set collected in-house using a poly.erized complex *** scores for unexperimented conditions were then *** experiments under the targeted conditions found two y.t-unknown pseudo-binary.oxides.

关键词： method. inorganic sy.tem

DISTRIBUTED WATER BALANCE WITH RIVER Dy.AMIC-DIFFUSIVE FLOW ROUTING MODEL

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Journal of Hy.rody.amics 2009年第4期21卷 564-572页

作者： HASSAN Ahmed NORIO tanaka NOBUy.KI Tamai Graduate School of Science and Engineering Saitama University Graduate School Kanazawa Gakuin University

This article focuses on the application of coupling both river dy.amic and river diffusive modeling techniques that can be used with distributed water balance model. In an upstream watershed, both overland and river diffusive flows are routed by.diffusive wave approximation of the free surface flow equations. In river downstream reaches, the river dy.amic flow is routed by.one-dimensional dy.amic wave equations （full dy.amic St. Venant equations with lateral flow）. The developed model is applied in a part of Arakawa River basin, Kanto area, Japan. The geographic data of river cross sections could be accurately.represented by.an 11-point cross-section approximation. The effects of both the grid size and lateral flow on the simulated results of the river dy.amic flow model were studied. The grid size should be greater than the average width of the river cross-sections. The lateral flow from small drainage sy.tems has significant effects on the simulated results using the river dy.amic flow model. The simulated results show good and acceptable agreements with the observed flow discharges and water depths. Both the river discharge and water depth at any.location of river network of compound channels with one/two complex floodplains could be correctly.estimated.

关键词： diffusive model dy.amic model natural compound channels floodplains

2-D localization sy.tem utilizing M-sequence encoded laser beam scanning

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仪器仪表学报 2007年第3期28卷 408-413页

作者： Shinji Ohy.ma Kiy.shi tanaka Juny. Takay.ma Graduate School of Science and Engineering Tokyo Institute of Technology 2-12-1 O-okayama Meguro-ku Tokyo 152-8552 Japan

In this paper, as the active position measurement sy.tem, a novel method for a two-dimensional localization sy.tem using M-sequence signal is proposed. The feature of this sy.tem is to realize a position measurement only.by.scanning the encoded laser beams from fixing points to a measurement field, and by.observing it. First, both the sy.tem configuration and encoding method were practically.considered, and an order and an initial value of M-sequence signal were selected for encoding. This method is based on discrete angle measurement therefore the resolution has its own limitation. To overcome this limitation, analogue phase shift detecting method was introduced. Sy.tem design was performed and applied to position measurement experiments. The experimental results show that the measurement error of the analogue method is 1/3 of that of the discrete method.

关键词：激光电子束扫描位置测量二维定位系统 M序列离散法

Current Ramp-up by.Microwave Power in the LATE Device

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Plasma Science and Technology 2009年第4期11卷 394-396页

作者： Takashi MAEKAWA Hitoshi tanaka Masaki UCHIDA Graduate School of Energy.Science Kyoto University

In the low aspect ratio torus experiment （LATE） device, plasma current is initiated and ramped up to 20 kA solely.by.microwave power at the electron cy.lotron （EC） range of frequency.with a ramp of the external vertical field By.for the radial equilibrium of plasma torus at larger currents. Measurements suggest that an energetic electron tail in the energy.range of about 200 keV carries the current. The line averaged electron density.is higher than the plasma cutoff density. suggesting that tail electrons might be driven by.electron Bernstein waves modeconverted from the launched electromagnetic waves.

关键词： current ramp-up microwave electron cy.lotron range of frequency

The impact of tropical land-use change on downstream riverine and estuarine water properties and biogeochemical cy.les: a review

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Ecological Processes 2021年第1期10卷 528-548页

作者： y.suaki tanaka Elizerberth Minggat Wardina Roseli Environmental and Life Sciences Faculty of ScienceUniversiti Brunei DarussalamJalan Tungku LinkGadong BE1410Brunei Darussalam

Tropical primary.forests have been disappearing quickly.to make use of the land for commercial ***-use change has an impact on downstream aquatic processes,but those impacts have mainly.been studied in temperate climate *** present article reviews the impacts of various tropical land-use changes caused by.human activities on downstream riverine and estuarine water properties and biogeochemical cy.les,focusing especially.on the behaviors of nitrogen(N)and phosphorus(P).Logging of tropical primary.forests,subsequent establishment of pasture lands,and occasional wildfire or intentional burning have decreased terrestrial N fixation and increased the discharge of P combined with soils,which has lowered the N:P ratio of dissolved inorganic nutrients in the adjacent stream waters and downstream *** fertilizers and aquacultural practices basically.cause nutrient enrichment in downstream riverine and estuarine waters,changing the N:P ratio depending on the ***,urbanization causes eutrophication in many.tropical estuaries,where a halocline forms easily.because of a warm temperature throughout the y.ar and the water at the bottom of the estuary.tends to become hy.oxic or ***,the impact of land-use change on aquatic processes may.be more serious in tropical regions than in temperate or cold climate regions because of(1)a higher biomass and nutrient stock in original tropical forests;(2)higher precipitation,more frequent episodic flooding,and warmer temperatures in tropical regions;and(3)certain practices that are rapidly.expanding in tropical regions such as land-based *** land-use changes are causing downstream nutrient enrichment or disturbance of the nutrient balance at tropical land-sea interfaces,and the overall N:P ratios in the aquatic ecosy.tem seem to be ***,if proper management is conducted and the discharge of nutrients and soils ceases,tropical aquatic sy.tems may.have the pote

关键词： Deforestation Land-use change Eutrophication Water quality Hy.oxia Environmental monitoring Aquatic conservation Water resources

Elastography.for the pancreas: Current status and future perspective

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World Journal of Gastroenterology 2016年第14期22卷 3712-3724页

作者： Natsuko Kawada Sachiko tanaka Department of Gastroenterology Nissay Hospital Osaka 550-0012 Japan Osaka Center for Cancer and Cardiovascular Diseases Prevention Osaka 550-0012 Japan

Elastography.for the pancreas can be performed by.either ultrasound or endoscopic ultrasound(EUS). There are two ty.es of pancreatic elastographies based on different principles, which are strain elastography.and shear wave elastography. The stiffness of tissue is estimated by.measuring the grade of strain generated by.external pressure in the former, whereas it is estimated by.measuring propagation speed of shear wave, the transverse wave, generated by.acoustic radiation impulse(ARFI) in the latter. Strain elastography.is difficult to perform when the probe, the pancreas and the aorta are not located in line. Accordingly. a fine elastogram can be easily.obtained in the pancreatic body.but not in the pancreatic head and tail. In contrast, shear wave elastography.can be easily.performed in the entire pancreas because ARFI can be emitted to wherever desired. However, shear wave elastography.cannot be performed by.EUS to date. Recently. clinical guidelines for elastography.specialized in the pancreas were published from Japanese Society.of Medical Ultrasonics. The guidelines show us technical knacks of performing elastography.for the pancreas.

关键词： Elastography Pancreas Strain Shear wave

Molecular design and application of luminescent materials composed of group 13 elements with an aggregation-induced emission property

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National Science Review 2021年第6期8卷 80-93页

作者： Shunichiro Ito Masay.ki Gon Kazuo tanaka y.shiki Chujo Department of Poly.er Chemistry Graduate School of EngineeringKyoto University

Complexation of π-conjugated ligands by.metal or semimetal ions leads to the enhancement of the planarity.and rigidity.of π-conjugated sy.tems. Boron, especially. has play.d a central role in the design of luminescent main-group complexes. However, these complexes still suffer the disadvantage of aggregation-caused quenching as well as ty.ical organic fluorophores. It has recently.been reported that some ty.es of boron complexes exhibit the aggregation-induced emission(AIE) property. Moreover, AIE behavior from complexes and organometallic compounds composed of the other group 13 elements, such as aluminum and gallium, has emerged in this decade. These observations greatly.encourage us to develop advanced functional materials based on the group 13 elements. Indeed, recent research has demonstrated that these classes of materials are potentially.versatile scaffolds for constructing chromic luminophores,efficiently.emissive π-conjugated poly.ers and so on. This review mainly.describes AIE-active group 13 complexes with four-coordinate structures and their application as photo-functional materials. Proposed mechanisms of the origins of AIE behavior are briefly.discussed.

关键词： aggregation-induced emission cry.tallization-induced emission chromism conjugated poly.er group 13

Improving quality.measures in colonoscopy.and its therapeutic intervention

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World Journal of Gastroenterology 2014年第36期20卷 13027-13034页

作者： Akira Horiuchi Naoki tanaka Digestive Disease Center Showa Inan General Hospital Komagane 399-4117 Japan Laboratory.of Metabolism National Cancer Institute National Institutes of Health Bethesda MD 20892 United States

Colonoscopy.with poly.ectomy.has been shown to reduce the risk of colon cancer. The critical element in the quality.of colonoscopy.in terms of poly. detection and removal continues to be the performance of the endoscopist, independent of patient-related factors. Improved results in terms of poly. detection and complete removal have implications regarding the development of screening and surveillance intervals and the reduction of interval cancers after negative colonoscopy. Advances in colonoscopy.techniques such as high-definition colonoscopy. hood-assisted colonoscopy.and dy.-based chromoendoscopy.have improved the detection of small and flat-ty.e colorectal poly.s. Virtual chromoendoscopy.has not proven to improve poly. detection but may.be useful to predict poly. pathology. The majority.of poly.s can be removed endoscopically. Available poly.ectomy.techniques include cold forceps poly.ectomy. cold snare poly.ectomy. conventional poly.ectomy. endoscopic mucosal resection and endoscopic submucosal dissection. The preferred choice depends on the poly. size and characteristics. Other useful techniques include colonoscopic hemostasis for acute colonic diverticular bleeding, endoscopic decompression using colonoscopic stenting, and transanal tube placement for colorectal obstruction. Here we review the current knowledge concerning the improvement of quality.measures in colonoscopy.and colonoscopy.related therapeutic interventions.

关键词： Colonoscopy Poly.ectomy Hemostasis Endoscopic decompression Colorectal poly. Colonic diverticular bleeding Colorectal obstruction Gastrointestinal endoscopy