Search Results 1-20 of 2358

  • Don't rely too much on trees: Evidence from flood mitigation in China

    Tembata Kaori , Yamamoto Yuki , Yamamoto Masashi , Matsumoto Ken'ichi

    … Combining a popular flood disaster dataset with climate data and satellite land cover data from China, this paper estimates how forests mitigate the frequency of flooding, resulting in two major findings. …

    Science of The Total Environment (732), 138410, 2020-05-07

    IR 

  • Experimental Performance Evaluation of the Collisions in LoRa Communications

    Ishida Yuya , Nobayashi Daiki , Ikenaga Takeshi

    … In the IoT, low power wide area (LPWA) networks can achieve low power consumption and provide a wide range of communication options that ensure constant service provision to deployed sensors. … However, since LoRa has insufficient specifications and verifications to resist channel contention within a heavily used frequency band, the performance of that technology is unclear when the number of sensors using the same frequency band increases. …

    2018 International Conference on Computational Science and Computational Intelligence(CSCI'18), 2020-01-02

    IR 

  • Analytical Method of SNS's Images Based on Computer Vision API to Discover Geographical Characteristics  [in Japanese]

    Hashimoto Kohjiro , Miyosawa Tadashi , Miyabe Mai , Tsuchiya Takeshi , Ozaki Takeshi , Hirose Hiroo

    … Therefore, there is a demand from tourist operators to discover the potential needs of their area.</p><p>In this paper, we propose a method for analyzing objects that the area has given interest to visitors from images posted on the social networking service to discover potential needs in the region. … The feature of this method is that it uses an image analysis service based on deep learning opened on the cloud service. …

    IEEJ Transactions on Electronics, Information and Systems 140(8), 916-924, 2020

    J-STAGE 

  • A Novel Multi-Satellite Multi-Beam System with Single Frequency Reuse Applying MIMO

    GOTO Daisuke , YAMASHITA Fumihiro

    … <p>This paper introduces a new multi-satellite multi-beam system with single frequency reuse; … it uses the MIMO (Multi Input Multi Output) technique to improve the frequency efficiency as the satellite communication band is limited. …

    IEICE Transactions on Communications E103.B(8), 842-851, 2020

    J-STAGE 

  • Effect of Early Stopping on Error Performance of Iterative MIMO Equalization: An Experience in Reality

    KASAI Mampei , MURATA Hidekazu , NAKAHIRA Toshiro , ISHIHARA Koichi , MORIYAMA Takatsune

    … In the experimental system, frequency-domain iterative MIMO equalization was employed, and its performance was evaluated by making use of recorded signal waveforms in a measurement campaign. …

    IEICE Communications Express, 2020

    J-STAGE 

  • ANTI-Fy<sup>b</sup> DETECTED AFTER PLATELET TRANSFUSION IN A PATIENT WITH MYELODYSPLASTIC SYNDROME  [in Japanese]

    Iwahara Kanae , Yokohama Akihiko , Maruhashi Takayuki , Susa Kozue , Nishimoto Natsumi , Ishikawa Reina , Yokote Keiko , Iriuchishima Hirono , Sekigami Tomomi , Handa Hiroshi

    … antigen and the extremely low frequency of natural anti-Fy<sup>b</sup> …

    Japanese Journal of Transfusion and Cell Therapy 66(3), 566-570, 2020

    J-STAGE 

  • An Actual Stadium Verification of WLAN using a Distributed Smart Antenna System (D-SAS)

    MURAKAMI Tomoki , ISHIHARA Koichi , ABEYSEKERA Hirantha , TAKATORI Yasushi

    … however, total throughput in a target area is saturated by inter-cell interference (ICI) because of the limited number of frequency channels available for WLANs. …

    IEICE Transactions on Communications, 2020

    J-STAGE 

  • A Method for Securing LFC Reserve by using Real-time PV Data  [in Japanese]

    Tsujii Yuki , Furukawa Toshiyuki , Watanabe Masahiro , Yamane Kenichiro

    … <p>When supply-and-demand imbalance occurs due to load fluctuation or output fluctuation of variable renewable energy sources like photovoltaic power generation (PV) in power system, frequency fluctuation occurs. … The fluctuation component from a few minutes to 20 minutes period is absorbed by the load frequency control (LFC). … If more LFC resereve is secured, the frequency fluctuation may decrease. … frequency fluctuation due to LFC reserve shortage, ii. …

    IEEJ Transactions on Power and Energy 140(7), 595-603, 2020

    J-STAGE 

  • A Bayesian Correction Approach for Improving Dual-frequency Precipitation Radar Rainfall Rate Estimates

    MA Yingzhao , CHANDRASEKAR V. , BISWAS Sounak K.

    … <p>The accurate estimation of precipitation is an important objective for the Dual-frequency Precipitation Radar (DPR), which is located on board the Global Precipitation Measurement (GPM) satellite core observatory. … To demonstrate the concepts developed in this study, data from the GPM overpasses of the Weather Service Surveillance Radar (WSR-88D), KHGX, in Houston, Texas, between April 2014 and June 2018 are used. …

    Journal of the Meteorological Society of Japan. Ser. II 98(3), 511-525, 2020

    J-STAGE 

  • Method to Transfer Transient Prototype Conditions to Closed Loop Model Test Rig

    Junginger Johannes , Kirschner Oliver , Riedelbauch Stefan

    … The simulations are controlled by a temporal power variation of the service pump. … Furthermore, it was assumed that this power plant also has a full size frequency converter for fast transition from pump mode to turbine mode and vice versa applying linear speed variation. …

    International Journal of Fluid Machinery and Systems 13(1), 1-11, 2020

    J-STAGE 

  • The Border between Patient Indulgence and Ensuring Safety in MR Imaging ~Understanding the Risks of Dental Implants, Tattoos, Cosmetics, etc.~  [in Japanese]

    DOI Tsukasa

    … Operators need to correctly understand the risk level of each item to improve patient service and find out the appropriate method for performing MRI.</p><p> … As for thermal clothing, we should compare the risk level and frequency of occurrences of burns due to heating with fractures due to falling. …

    Japanese Journal of Magnetic Resonance in Medicine 40(2), 72-81, 2020

    J-STAGE 

  • Measurement of spectral transfer matrix for DMD analysis by using linear optical sampling

    Osaka Yuki , Ito Fumihiko , Iida Daisuke , Manabe Tetsuya

    … By u sing the eigenvalue analysis of the STM, the differential mode delay and PMD vector of polarization maintaining fiber are analyzed as a function of optical frequency over 1 THz. …

    IEICE Transactions on Communications, 2020

    J-STAGE 

  • PROPOSAL OF GENERATION-TYPE TMD WITH ELECTROMAGNETIC DAMPING DEVICE AND ITS APPLICATION TO AN ACTUAL BRIDGE UNDER SERVICE

    IWABUKI Hiroshi , SASAKI Eiichi , TAKEYA Koichi , OSAFUNE Toshikazu , YASUDA Hideaki

    … <p> In this study, a power generation-type Tuned Mass Damper (TMD) with an electromagnetic damping device that enables power generation and easier damping adjustment is proposed as an alternative to the conventional TMD with oil dampers installed on expressway bridges in service. … A road traffic vibration test on an actual bridge in service was carried out to verify its damping effect and effect on reducing low-frequency noise. …

    Journal of JSCE 8(1), 103-117, 2020

    J-STAGE 

  • POSSIBILITIES OF HIGH FREQUENCY TRAIN OPERATION USING MOVING BLOCK SIGNALING: A CASE STUDY OF DENEN-TOSHI LINE AND HANZOMON LINE  [in Japanese]

    YOSHIE Haruki , KOBAYASHI Wataru , IWAKURA Seiji

    … Passengers would see substantially less waiting and crowding with MBS that equates to 40 or more trains per hour.</p><p> In this paper, the authors have studied possibilities of high frequency train operation using MBS for the Denen-toshi line and Hanzomon line in Tokyo Metropolitan area as a case study. …

    Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management) 76(2), 43-62, 2020

    J-STAGE 

  • Change of pathotype and phylogenetic analysis of infectious bronchitis virus detected in Kagoshima prefecture, Japan

    IWAMOTO Jiro , OKADA Daisuke , KITAHARA Syouei , CHITOSE Kenichi

    … The frequency of cases that the renal lesion characteristic of IBV infection was histopathologically confirmed was significantly higher from 2014 to 2018 than from 2008 to 2009, suggesting the altered pathotype of IBV. …

    Journal of Veterinary Medical Science 82(4), 431-436, 2020

    J-STAGE 

  • A STUDY ON THE INFLUENCE OF BUS DRIVER'S HOSPITALITY ON CUSTOMER'S BUS-USING  [in Japanese]

    SUZUKI Yu , HINO Satoru , MIKAMI Kohei

    … <p>In this research, we grasped the specific contents of the points with good feeling and the points that felt unpleasant about customer service of the route bus driver. … It was revealed that while there were many drivers who provided good service, there were also drivers with bad attitudes. … Among those who experienced bad service once, some wanted to reduce the use of buses. …

    Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management) 75(6), I_513-I_522, 2020

    J-STAGE 

  • ANALYSIS OF HIGHWAY BUS ROUTE CHOICE FOR INSTALLING NEW BUS CONNECTION SERVICE AT REST AREA OF INTERCITY EXPRESSWAY  [in Japanese]

    KUSAKABE Takahiko , YAGINUMA Hideki , FUKUDA Daisuke , TAKAHASHI Satoshi , KON Takeshi , SANO Kaoru , NOMURA Sakiko

    … Due to relatively small demand, frequency of bus services is possibly not enough for travelers to satisfy their preferences of arrival time. …

    Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management) 75(6), I_369-I_377, 2020

    J-STAGE 

  • A Long Delay Multipath Equalization Using High Frequency Resolution Spatial Filters for SDM MIMO-OFDM Systems

    TAKEUCHI Tomoaki , OKANO Masahiro , TSUCHIDA Kenichi

    … The direct solution to this problem in orthogonal frequency division multiplexing (OFDM) system is to make the guard interval (GI) longer than the maximum channel delay. … However, given the wide variety in broadcasting channel characteristics, the worst case GI may be twice the value needed which decreases the spectral efficiency and service quality. …

    IEICE Transactions on Communications E103.B(4), 476-484, 2020

    J-STAGE 

  • The APU Corpus of Japanese Learner English

    DIAZ Anthony

    … The topics of discussion will include adescription of the process of corpus design and text collection, a discussion of word frequencies incomparison with a native English corpus (LOCHNESS), and a discussion of the word coverage ofthe New General Service List (NGSL) and the New Academic Word List (NAWL). …

    APU Journal of Language Research 5(0), 38-55, 2020

    J-STAGE 

  • STATIC AND DYNAMIC STRUCTURAL PERFORMANCE OF MODERN TIMBER BRIDGES

    TOYODA Atsushi , HONDA Hideyuki , KATO Shingo

    … This study investigated the structural characteristics measured by field tests on 23 modern timber bridges immediately after completion, and then evaluated actual structural performance of those bridges based on the static and dynamic characteristics, such as static deflection, static rigidity, natural frequency, damping coefficient, dynamic increment factor (impact factor), vibration serviceability, and so on. …

    Journal of JSCE 8(1), 26-34, 2020

    J-STAGE 

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