Search Results 1-20 of 600

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Fabrication of titanium restoration by means of calcium aluminate-bonded magnesia investment material and one-chamber arc casting apparatus

Furuchi Mika , Takeuchi Yoshimasa , Kamimoto Atsushi , Matsumura Hideo , Imai Hideyuki , Koizumi Hiroyasu

… Titanium casting requires specific investment material and casting apparatus. … A smooth surface on the restoration was obtained by polishing at low speed. …

Journal of Oral Science 63(1), 119-120, 2021

J-STAGE
2

Effects of structural parameters on the electric generating performances of the wind energy harvesting flag using piezoelectric films [in Japanese]

ODA Chisuzu , NISHIGAKI Tsutomu

… In order to overcome the low power generation of the piezoelectric wind energy harvesting method at small wind speeds, vortex-induced vibrations (VIVs) of the flexible cylinder excited by the Karman vortex generated downstream of PCSWEHFs was used and it was shown in the preliminary experiment that more than ten times larger power was generated by PCSWEHFs compared with the conventional planar-type piezoelectric energy harvesting flags. …

The Proceedings of the Symposium on Environmental Engineering 2020.30(0), 415, 2020

J-STAGE
3

Examination of the Feasibility of Area-Specific Criteria of Special Weather Report by Estimation of the Threshold Value of Disaster-Causing Strong Winds

Kim Hyunuk , Kim Baek-Jo , Nam Hyoung-Gu , Jeong Jonghyeok , Shim Jae-Kwan , Kim Kyu Rang , Kim Seungbum

… Therefore, in this study, relationship between wind speed and damage was analyzed, and the threshold value of damage-causing wind speed was estimated. … We first analyzed the relationship between wind speed and damage occurrences based on the daily maximum wind speed and daily maximum instantaneous wind speed data, and data on damage related to strong winds. …

SOLA 16(0), 180-184, 2020

J-STAGE
4

A study on small low specific speed centrifugal pumps Effects of volute shape on pump performances [in Japanese]

OURA Ryu , ODA Yasuhisa , HORIE Masaaki

The Proceedings of Conference of Kansai Branch 2020.95(0), P_019, 2020

J-STAGE
5

Classification of Homogeneous Regions of Strong Wind and Gust Wind in Korea

Kim Hyunuk , Kim Baek-Jo , Nam Hyoung-Gu , Jeong Jonghyeok , Shim Jae-Kwan , Kim Kyu Rang , Kim Seungbum

… In this study, based on the daily maximum wind speed and maximum instantaneous wind speed data recorded at 61 observation points operated by the Korea Meteorological Administration from 1993 to 2018, the self-organizing map clustering method was used to classify regions with similar characteristics of strong wind and gust wind occurrence and intensity. …

SOLA 16(0), 140-144, 2020

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6

4-01　Investigation of propeller blade shape for micro hydro power [in Japanese]

KATOU Chigira , SHUCHI Shigemitsu

… In this study, propeller blade shape suitable for low head and low flow rate condition are investigated by using numerical analysis. … The performance of forty-eight blades which are changed three design parameters "specific speed, distance rate of maximum camber from leading edge 𝑥/𝑐 , maximum camber rate 𝑓/𝑐" are compared. …

Proceedings of the Annual Conference of The Japan Institute of Energy 29(0), 110-111, 2020

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7

Study on an Impeller with Radial and Circumferential-Flow Channels

Konishi Takeshi , Hirano Yasuyuki , Nishi Yasuyuki

… Various types of centrifugal impellers have been proposed to achieve low flow rates and high heads. …

International Journal of Fluid Machinery and Systems 13(2), 543-555, 2020

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8

Experiments on Pressure Distribution of a Low Specific-Speed Centrifugal Pump with Atypical Open Impeller

Zhang Yuliang , Zhu Zuchao , Li Wenguang

… In the present study, a novel testing system is presented for obtaining distribution characteristics of pressure field inside a low specific-speed centrifugal pump with atypical open impeller, wherein the components of the system are described in detail. …

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 53(6), 237-245, 2020

J-STAGE
9

Optimization Design of an Ultra-Low Specific-Speed Centrifugal Pump Using Entropy Production Minimization and Taguchi Method

Wang Cong , Zhang Yongxue , Hou Hucan , Yuan Zhiyi , Liu Ming

… To improve the energy conversion efficiency and cavitation performance of the ultra-low specific-speed centrifugal pump (ULSSCP), the impeller-volute interaction has been studied. …

International Journal of Fluid Machinery and Systems 13(1), 55-67, 2020

J-STAGE
10

Distribution of particle sedimentation thickness under constant relative centrifugal force in rotating separation system using wireless electrical resistance detector

PRAYITNO Yosephus Ardean Kurnianto , ZHAO Tong , ISO Yoshiyuki , TAKEI Masahiro

… Parameters in the separation system, such as feeding flow rate and rotational speed, influence the sedimentation formation. … The main focus is to observe the particle sedimentation thickness in the specific positions inside an industrial-scale centrifuge. … This wireless instrument has an excellent performance in ultra-high rotation operating speed due to its lightweight and flexibility. …

Mechanical Engineering Journal 7(3), 19-00577-19-00577, 2020

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11

The Rotor-Stator Interaction Onboard a Low Specific speed Francis Turbine

Agnalt Einar , Solemslie Bjørn Winther , Storli Pål-Tore Selbo , Dahlhaug Ole Gunnar

… Over the last years, several breakdowns in hydropower plants with low specific speed Francis runners have been reported. …

International Journal of Fluid Machinery and Systems 13(2), 302-309, 2020

J-STAGE
12

Determining parameters of the CSUH constitutive model by genetic algorithm

Binglong Zhu , Xiaoxue Su , Yuqing Cao , Fengxiang Yan

… When determining the parameters of CSUH model by conventional methods, many conventional tests are required to be done, including low and high confining pressure triaxial tests and isotropic compression tests with specific initial void ratio. …

Japanese Geotechnical Society Special Publication 8(6), 188-193, 2020

J-STAGE
13

ASAN: Self-Attending and Semantic Activating Network towards Better Object Detection

ZHU Xinyu , ZHANG Jun , CHEN Gengsheng

… Recent top-performing object detectors usually depend on a two-stage approach, which benefits from its region proposal and refining practice but suffers low detection speed. … 2) leveraging the class-discriminative localization ability of classification-trained CNN, the semantic activating module learns a semantic meaningful convolutional response which augments low-level convolutional features with strong class-specific semantic information. …

IEICE Transactions on Information and Systems E103.D(3), 648-659, 2020

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14

Optimization Design of an Ultra-Low Specific-Speed Centrifugal Pump Using Entropy Production Minimization and Taguchi Method

Wang Cong , Zhang Yongxue , Hou Hucan , Yuan Zhiyi , Liu Ming

… To improve the energy conversion efficiency and cavitation performance of the ultra-low specific-speed centrifugal pump (ULSSCP), the impeller-volute interaction has been studied. …

International Journal of Fluid Machinery and Systems 13(1), 55-67, 2020

J-STAGE
15

High-speed-braking performance of rubber brake filled with RB ceramics particles under rain conditions [in Japanese]

SHIBATA Kei , IGARASHI Jo , YAMAGUCHI Takeshi , UCHIDA Hisashi , HOKKIRIGAWA Kazuo

… We developed a brake shoe made of a fluorine-contained rubber (FKM) compound filled with rice bran ceramics (RBC) particles for a caliper brake of bicycle and evaluated the braking performance and tribological properties on the wet condition from high running speed to stopping. … The brake wire pull force was 60 N, which corresponded to a low grip force. … The specific wear rate of the FKM/RBC shoe was much smaller than the other samples. …

Transactions of the JSME (in Japanese) 86(881), 19-00397-19-00397, 2020

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16

Obstacle avoidance training for individuals with stroke: a systematic review and meta-analysis

Muroi Daisuke , Ohtera Shosuke , Kataoka Yuki , Banno Masahiro , Tsujimoto Yasushi , Tsujimoto Hiraku , Higuchi Takahiro

… The obstacle avoidance training (training) group had lower gait speed than the control group (mean difference (MD) 0.03, 95% CI −0.11 to 0.16, p=0.51). … Further, the certainty of evidence was very low. … The subjective balance ability (Activities-specific Balance Confidence scale) was not significantly different between the training and control groups (MD 6.65, 95% CI −7.59 to 20.89, p=0.36), and it showed very low certainty of evidence. …

BMJ open 9(12), 2019-12

IR
17

Research on the effect of nitrogen gas blow in titanium alloy cutting [in Japanese]

KIMURA Ritsu , SAKAI Katsuhiko , SHIZUKA Horoo

… Titanium alloy has excellent characteristics such as a light weight, high strength, high specific strength alloy with excellent corrosion resistance and biocompatibility, and is mainly used in the aerospace and medical fields. … However, titanium alloys are known as difficult-to-cut materials because of their low thermal conductivity and their high chemical activity. …

The Proceedings of The Manufacturing & Machine Tool Conference 2019.13(0), A24, 2019

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18

Pathophysiology and diagnostic criteria of multiple sclerosis that has changed as the evolution of technology [in Japanese]

Fukaura Hikoaki

… The Brief International Cognitive Assessment for MS (BICAMS) battery includes tests of mental processing speed and memory. … Later they were revised again in 2017 as follows : patients with a typical clinically isolated syndrome and clinical or MRI demonstration of dissemination in space, the presence of CSF–specific oligoclonal bands allows a diagnosis of multiple sclerosis. …

Neurological Therapeutics 36(4), 415-421, 2019

J-STAGE Ichushi Web
19

Specific Internal Flow in Balancing Hole [in Japanese]

YAMASHITA Yosuke , MATSUI Jun , OKUBO Atsushi

… in the hole and rotational speed u, we carried out CFD simulations. … Furthermore, for very low range of v/u, we found a rare flow situation with S-shaped streamlines. …

Turbomachinery 47(12), 723-729, 2019

J-STAGE
20

Study on Pump Performance of Impeller with Radial and Circumferential Flow Channel [in Japanese]

KONISHI Takeshi , HIRANO Yasuyuki , NISHI Yasuyuki

… Centrifugal pumps requiring small flow rate and high head performance are required to improve performance at low specific speed. … However, a low specific speed impeller cannot be applied to the conventional design method. …

The Proceedings of Mechanical Engineering Congress, Japan 2019(0), J05503, 2019

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