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A Proposal for Generating Good Assembly Sequences by Tournament Tree
Tsuboi, Kenji,Matsumoto, Toshiyuki,Shinoda, Shinji,Niwa, Akira Korean Institute of Industrial Engineers 2011 Industrial Engineeering & Management Systems Vol.10 No.2
In seeking further efficiency in production preparation, it is common to examine assembly sequences using digital manufacturing. The assembly sequences affect the product evaluation, so it is necessary to test several assembly sequences before actual production. However, because selection and testing of assembly sequences depends on the operator's personal experience and intuition, only a small number of assembly sequences are actually tested. Nevertheless, there is a systematic method for generating assembly sequences using a contact-related figure. However, the larger the number of parts, the larger the number of assembly sequences geometric becomes. The purpose of this study is to establish a systematic method of generating efficient assembly sequences regardless of the number of parts. To generate such assembly sequences selectively, a "Tournament Tree," which shows the structure of an assembly sequence, is formulated. Applying the method to assembly sequences of a water valve, good assembly sequences with the same structure as the Tournament Tree are identified. The structure of such a Tournament Tree tends to have fewer steps than the others. As a test, the structure is then applied for a drum cartridge with 38 parts. In all the assembly sequences generated from the contact-related figures, the best assembly sequence is generated by using the Tournament Tree.
The enhanced phosphorescence from Alq<sub>3</sub> fluorescent materials by phosphor sensitization
Tsuboi, T.,Kwon, J.H.,Liu, X.,Huang, W. Elsevier Sequoia 2014 Journal of photochemistry and photobiology Chemist Vol.291 No.-
The green emission accompanied with intense red phosphorescence is observed from the tris(8-hydroxyquinoline) aluminum (Alq<SUB>3</SUB>) in the heavily doped tris(2-phenylpyridine) iridium [Ir(ppy)<SUB>3</SUB>] films. This photoluminescence (PL) emission mechanism is studied by the PL excitation (PLE) spectra for the red and green emissions. From the PLE spectrum for the red emission, the energy transfer from Ir(ppy)<SUB>3</SUB> to Alq<SUB>3</SUB> is confirmed. The increase of the green emission with increasing temperature from 12K is explained by the endothermic back Forster energy transfer from the triplet T<SUB>1</SUB> state of Ir(ppy)<SUB>3</SUB> to the singlet S<SUB>1</SUB> state of Alq<SUB>3</SUB>. It is suggested that this back transfer is partially responsible for the decrease of the red emission intensity corresponding to the increase of the green emission. Unlike the Forster energy transfer, the Dexter energy transfer from the T<SUB>1</SUB> state of Ir(ppy)<SUB>3</SUB> to the T<SUB>1</SUB> state of Alq<SUB>3</SUB> is highly efficient. The explanation for this process is presented here. The green emission is not attributed to Ir(ppy)<SUB>3</SUB> but to Alq<SUB>3</SUB>, because not only the green emission profile but also the red emission profile is quite similar to the δ-phase polycrystalline Alq<SUB>3</SUB>. From these results, it is concluded that the Alq<SUB>3</SUB> forms a δ-phase polycrystalline state to accept the phosphor sensitization. The unusual enhancement of the red phosphorescence from the Alq<SUB>3</SUB> is explained by the mixing of the T<SUB>1</SUB> state of Ir(ppy)<SUB>3</SUB> with the T<SUB>1</SUB> state of Alq<SUB>3</SUB> under the Dexter energy transfer of short range process, by taking into account that the T<SUB>1</SUB> state of Ir(ppy)<SUB>3</SUB> contains the singlet state by the strong spin-orbit coupling.
A Proposal for Generating Good Assembly Sequences by Tournament Tree
Kenji Tsuboi,Toshiyuki Matsumoto,Shinji Shinoda,Akira Niwa 대한산업공학회 2011 Industrial Engineeering & Management Systems Vol.10 No.2
In seeking further efficiency in production preparation, it is common to examine assembly sequences using digital manufacturing. The assembly sequences affect the product evaluation, so it is necessary to test several assembly sequences before actual production. However, because selection and testing of assembly sequences depends on the operator"s personal experience and intuition, only a small number of assembly sequences are actually tested. Nevertheless, there is a systematic method for generating assembly sequences using a contact-related figure. However, the larger the number of parts, the larger the number of assembly sequences geometric becomes. The purpose of this study is to establish a systematic method of generating efficient assembly sequences regardless of the number of parts. To generate such assembly sequences selectively, a "Tournament Tree," which shows the structure of an assembly sequence, is formulated. Applying the method to assembly sequences of a water valve, good assembly sequences with the same structure as the Tournament Tree are identified. The structure of such a Tournament Tree tends to have fewer steps than the others. As a test, the structure is then applied for a drum cartridge with 38 parts. In all the assembly sequences generated from the contact-related figures, the best assembly sequence is generated by using the Tournament Tree.
동아시아 모더니즘의 교차점 -이상과 동시대의 일본문학-
쯔보이히데토 ( Tsuboi Hideto ) 국제한국문학문화학회 2008 사이 Vol.5 No.-
This article examines the modernist poet, Yi Sang, who straddled national boarders for a short time in the 1930s. In doing so, this article spotlights the Modernist movement in East Asia, its possibilities and problems. Even if we admit a world with Western Europe and Asia on opposing poles of a vertical dimension, and the Eastern Asia intersecting that line in another opposition, this can only be seen as a by-product of the imperialist, colonial era. However, was the methodological bridge that Yi Sang, at the time a nearly unknown writer, created across the space of East Asia, nothing more than a creation of Yi`s unconsciousness? However, Yi has presented us with a field of the political unconscious, a truly significant act indeed. Yi`s literature is composed of a number of dualities: a linguistic duplicity of Japanese and Korean; a duplicity of poetic and novel genres; and a duplicity of space, between Seoul and Tokyo. In this study, I compare the duplicity of Yi Sang to Kitagwa Fuyuhiko`s short poetry, and to the work of other contemporary Japanese writers like Kajii Motojiro and Tachihara Michizo. In that analysis, I argue that Yi`s excessive consciousness of ecriture is what creates a bridge between the two worlds.