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Effect of Oxygen on Mechanical Properties of Metal Injection Molded Titanium and Titanium Alloy
Doi Kenji,Hanami Kazuki,Tanaka Hideki,Teraoka Tsuneo,Terauchi Shuntaro 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
Mechanical properties of metal injection molded titanium and titanium alloy parts were investigated in this study. Material powders with low oxygen content and spherical shape were obtained by electrode induction-melting gas atomization which could melt and atomize titanium and titanium alloy bars with no touch on crucible or tundish. Tensile specimens were fabricated from obtained powders by metal injection molding process. Tensile strength of the specimens increases with increasing oxygen content. This result corresponds to a tendency of wrought metal.
Macro-To-Micro Urban Simulation Model for the Assessment of Quality of Life
Masanobu KII, Kenji DOI 서울시립대학교 도시과학연구원 2003 International journal of urban sciences (IJUS) Vol. No.
Upgrading of the Quality of Life (QOL) is a key concept in urban policies. Proposed QOL indicators in past studies include both macro and micro factors. From the aspect of policy formulation, the causalities between policies and these indicators have to be captured for its evaluation. The factors of QOL vary very broadly from regional socio-economic to the consequences on individual life, therefore, as to giving shape to this QOL evaluation analysis, we attempt to develop comprehensive simulation framework that consists of large zonal activity location model and small mesh land-use model. In this paper, as a first step of this attempt, we present a conceptual frame of the whole system and especially propose a micro land-use simulation model in this system.
Kazuhiro Nakaso,Yoshiki Adachi,Emi Fusayasu,Koji Doi,Keiko Imamura,Kenichi Yasui,Kenji Nakashima 대한신경과학회 2012 Journal of Clinical Neurology Vol.8 No.3
Background Leber’s hereditary optic neuropathy (LHON) is a mitochondrial disorder with optic nerve atrophy. Although there are no other associated neurological abnormalities in most cases of LHON, cases of “LHON plus” have been reported. Case Report The proband was a 37-year-old man who had visual and gait disturbances that had first appeared at 10 years of age. He showed horizontal gaze palsy, gaze-evoked nystagmus, dysarthria,and cerebellar ataxia. Brain and orbit MRI disclosed atrophy of the optic nerve and cerebellum,and degenerative changes in the bilateral inferior olivary nucleus. Mutational analyses of mitochondrial DNA identified the coexistence of heteroplasmic G11778A and homoplasmic T3394C mutations. Conclusions These results suggest that the combination of G11778A and T3394C mutations leads to an atypical LHON phenotype.