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Performance Requirement of Ship’s Speed in Docking/Anchoring Maneuvering
Kimio TATSUMI,Hidenobu FUJII,Takashi KUBOTA,Shigeyuki OKUDA,Yasuo ARAI,Nobuyoshi KOUGUCHI,Kozaburo YAMADA 한국항해항만학회 2006 한국항해항만학회 학술대회논문집 Vol.1 No.-
Questionnaire survey on performance requirement of ship’s speed such as not only accuracy but also response and robustness were carried out, and the experiments to survey the GPS performances of static and dynamic characteristics were carried out simultaneously. In this paper, the questionnaire survey focusing on docking maneuvering, some analytic results of the survey, the results of GPS performance, and the possibility of adaptation for docking maneuvering on SDME and GPS are discussed. Consequently, from the results of questionnaire survey the performance requirement of ship’s speed in docking/anchoring maneuvering have need under 1cm/sec on the standard deviation, and speed information from GPS was adopted to use maneuvering information in docking/anchoring.
Naoyuki Tatsumi,Yoshihito Maeda,Hiroshi Nozawa,Shin-ichi Tamai 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.46 No.1
We have investigated the structural changes of SrBi2Ta2O9 (SBT) and Bi3:75La0:25Ti3O12 (BLT)lms under a high temperature annealing process at 800 C in a vacuum (pressure = 103 Pa),which is an extreme annealing condition. An improvement in the crystalline orientation due to the coalescence of crystalline grains was conrmed. Raman studies revealed that the deciency of Bi3in the Bi oxide layer of SBT was caused by the annealing and occurred to a greater extent than inBLT. This dierence between SBT and BLT is discussed on the basis of the dierence in stabilitybetween (TaO6) and (TiO6) octahedrons.
Nanomaterials for Advanced Electrode of Low Temperature Solid Oxide Fuel Cells (SOFCs)
Ishihara, Tatsumi The Korean Ceramic Society 2016 한국세라믹학회지 Vol.53 No.5
The application of nanomaterials for electrodes of intermediate temperature solid oxide fuel cells (SOFC) is introduced. In conventional SOFCs, the operating temperature is higher than 1073 K, and so application of nanomaterials is not suitable because of the high degradation rate that results from sintering, aggregation, or reactions. However, by allowing a decrease of the operating temperature, nanomaterials are attracting much interest. In this review, nanocomposite films with columnar morphology, called double columnar or vertically aligned nanocomposites and prepared by pulsed laser ablation method, are introduced. For anodes, metal nano particles prepared by exsolution from perovskite lattice are also applied. By using dissolution and exsolution into and from the perovskite matrix, performed by changing $P_{O2}$ in the gas phase at each interval, recovery of the power density can be achieved by keeping the metal particle size small. Therefore, it is expected that the application of nanomaterials will become more popular in future SOFC development.