論文アクセスランキングは、J-STAGE が毎月作成するアクセス統計データを集計し、作成したランキングで、集計の対象は書誌事項へのアクセスです。書誌事項とはタイトル、著者名、キーワード、アブストラクトなどが記載されている、デジタルオブジェクト識別子(DOI:Digital Object Identifier) が指定するURL になります。

第94期編修理事会

Prospect and Recent Research & Development for Civil Use Autonomous Unmanned Aircraft as UAV and MAV

Kenzo NONAMI

Journal of System Design and Dynamics (2007)　DOI:10.1299/jsdd.1.120

 

This paper describes the present state of research and development for civil use autonomous unmanned aircraft. In particular,the history of civil use UAVs, the research and development in the world and in Japan, and the subjects and prospects for control and operation systems of civil use autonomous UAVs are described.

 

Experimental Method of In-pile Creep Rupture Behavior of ODS Cladding Materials in the Experimental Fast Reactor Joyo

Chikara ITO, Eiichi KAGOTA, Takafumi AOYAMA
Journal of Power and Energy Systems (2008)　DOI:10.1299/jpes.2.620

 

An in-pile creep rupture experiment was conducted in the experimental fast reactor Joyo to evaluate the creep rupture strength of oxide dispersion strengthened (ODS) ferritic steel under neutron irradiation. ODS has been developed as a most promising fuel cladding material for the next generation fast reactor because of its high temperature resistance and low swelling properties. The irradiation test device MAterial testing RIg with temperature COntrol (MARICO) was developed for the in-pile experiment in Joyo with a temperature control precision of ±4°C. Twenty four ODS specimens with no fuel were pressurized by helium gas up to 22 MPa to accelerate the creep rupture testing. The specimen temperature in the MARICO is controlled by changing the ratio of argon and helium ll gases,which changes the gas gap thermal conductivity between the double walled capsule containing the specimen. The experiment was carried out in the Joyo MK-III core from April 2006 until May 2007. Each creep rupture event was successfully detected by the temperature change at the exit of the capsule and by gamma-ray spectrometry of the reactor cover gas when the lled gas was released from the specimen. The specimen was then identied by analyzing the tag gas isotopic ratio using laser resonance ionization mass spectrometry (RIMS).

 

Simulation Analysis of the Effect of Trunk Undulation on Swimming Performance in Underwater Dolphin Kick of Human

Motomu NAKASHIMA
Journal of Biomechanical Science and Engineering (2009)　DOI:10.1299/jbse.4.94

 

The objectives of this study were to investigate the effect of trunk undulation on the swimming performance in underwater dolphin kick, and to clarify the ideal trunk undulation form. The reference swimming motion of an elite swimmer was rstly acquired from the video analysis, and input into the swimming human simulation model SWUM, which had been developed by the authors. The trunk motion was next optimized by the simulation for three objective functions: maximizing swimming speed, maximizing propulsive efciency, and minimizing uid force acting on hands. The following ndings were obtained: In the case of maximizing swimming speed,the whole body forms a ‘C’ shape due to the in-phase trunk undulation. The swimming motion of maximizing propulsive efficiency and the reference swimming are considerably similar to each other. In both cases, the trunk moves as a seesaw with a node; whereas, the lower limbs form a traveling wave in the absolute space. The values of propulsive efciency are around 0.2 in the cases of maximizing propulsive efficiency,minimizing uid force on hands, and the reference swimming.
The swimming motion in the case of minimizing fluid force on hands is almost the same as that of maximizing propulsive efciency. The trunk undulation with the appropriate amplitudes and phases, especially bending at the chest, is important in realizing the swimming motion which maximizes propulsive efciency.

 

4 位	Large eddy simulation with modeled wall-stress: recent progress and future directions Johan LARSSON, Soshi KAWAI, Julien BODART, Ivan BERMEJO-MORENO Mechanical Engineering Reviews (2016)　DOI:10.1299/mer.15-00418
5 位	A Review on High-Speed Machining of Titanium Alloys Mustazur RAHMAN, Zhi-Gang WANG, Yoke-San WONG JSME International Journal Series C Mechanical Systems, Machine Elements and Manufacturing (2006)　DOI:10.1299/jsmec.49.11
6 位	Modeling of Electromagnetic Damper for Automobile Suspension Yasuhiro KAWAMOTO, Yoshihiro SUDA, Hirofumi INOUE, Takuhiro KONDO Journal of System Design and Dynamics (2007)　DOI:10.1299/jsdd.1.524
7 位	Modified Gamma-Based Model for Solving Low Mach Number Compressible Two Phase Flows Junichi OOIDA, Kota NAKANO, Kohei NAGANE Journal of Fluid Science and Technology (2013)　DOI:10.1299/jfst.8.75
8 位	Possibility for controlling global warming by launching nanoparticles into the stratosphere Shigenao MARUYAMA, Takeshi NAGAYAMA, Hiroki GONOME, Junnosuke OKAJIMA Journal of Thermal Science and Technology (2015)　DOI:10.1299/jtst.2015jtst0022
9 位	Development of Swimming Human Simulation Model Considering Rigid Body Dynamics and Unsteady Fluid Force for Whole Body Motomu NAKASHIMA, Ken SATOU, Yasufumi MIURA Journal of Fluid Science and Technology (2007)　DOI:10.1299/jfst.2.56
10位	Effect of Fiber Length on Mechanical Properties of “Green” Composites Using a Starch-Based Resin and Short Bamboo Fibers Hitoshi TAKAGI, Yohei ICHIHARA JSME International Journal Series A Solid Mechanics and Material Engineering (2004) DOI:10.1299/jsmea.47.551