http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
오늘 본 자료
Curing Reaction Kinetics of Epoxy/Amine at a Quartz Interface
Ko Yamaguchi,Daisuke Kawaguchi,Satoru Yamamoto,Keiji Tanaka 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
The chemical reaction between epoxy and amine compounds at a solid interface is crucial for the manifestation of the adhesion strength. Here we examined the curing reaction kinetics of epoxy phenol novolac and 4,4"-diaminodiphenyl sulfone at a quartz interface using sum frequency generation spectroscopy, and compared it with the bulk one measured by Fourier-transform infrared spectroscopy. A reaction rate constant (k) was much larger at the quartz interface than in the bulk. While the apparent activation energy at the quartz interface obtained from the Arrhenius plot was identical to the bulk value, the frequency factor (A) at the quartz interface was approximately 5.8 times larger than the bulk one. The results could be explained in terms of the peculiar interfacial aggregation states in which adsorbed epoxy and amine molecules were well-oriented and more closely packed.
Takashi Kawashimo,Daisuke Doyo,Tatsuya Yamaguchi,Ryosuke Nakajima,Toshiyuki Matsumoto 대한산업공학회 2015 Industrial Engineeering & Management Systems Vol.14 No.2
The recent manufacturing industry in Japan has found it difficult to transfer skills from trained workers to inexperienced workers because the former ages and then retires. This is a particular problem for lathe process, as this operation requires explicit and tacit knowledge, and defining the skills clearly in a manual is difficult. This study aims to develop a training system for lathe operation by using a simulator; this includes formulas that help define the relationship between the speed of tool feed and cutting sound/shape of chips which were proposed in the preceding study. The developed training system is verified the effectiveness.
Kawashimo, Takashi,Doyo, Daisuke,Yamaguchi, Tatsuya,Nakajima, Ryosuke,Matsumoto, Toshiyuki Korean Institute of Industrial Engineers 2015 Industrial Engineeering & Management Systems Vol.14 No.2
The recent manufacturing industry in Japan has found it difficult to transfer skills from trained workers to inexperienced workers because the former ages and then retires. This is a particular problem for lathe process, as this operation requires explicit and tacit knowledge, and defining the skills clearly in a manual is difficult. This study aims to develop a training system for lathe operation by using a simulator; this includes formulas that help define the relationship between the speed of tool feed and cutting sound/shape of chips which were proposed in the preceding study. The developed training system is verified the effectiveness.
Kenji Koneri,Yasuo Hirono,Daisuke Fujimoto,Katsuji Sawai,Mitsuhiro Morikawa,Makoto Murakami,Takanori Goi,Atsushi Iida,Kanji Katayama,Akio Yamaguchi 대한위암학회 2013 Journal of gastric cancer Vol.13 No.1
Alpha-fetoprotein–producing gastric cancer is associated with poor prognosis because of frequent liver and lymph node metastasis. We present a case with synchronous liver metastasis who survived for 5 years. A 69-year-old man with upper abdominal pain was referred to our hospital. Gastrointestinal endoscopy revealed a Borrmann II-like tumor in the lower part of the stomach. Computed tomography revealed a tumor in the left lobe of the liver. Serum alpha-fetoprotein levels were markedly increased. We performed distal gastrectomy after administering oral tegafur/gimeracil/oteracil potassium and administered hepatic intra-arterial cisplatin injection. Liver metastasis showed partial response on computed tomography. Despite left hepatic lobectomy, further metastases to the liver and mediastinal lymph nodes became difficult to control. After sorafenib tosylate administration, stabilization of the disease was observed for 4 months. We conclude that hepatic intra-arterial chemotherapy and oral administration of sorafenib tosylate may potentially improve the prognosis in such cases.
Efficient dye-sensitized solar cell sub-modules
Hironori Arakawa,Takeshi Yamaguchi,Takanori Sutou,Yutaro Koishi,Nobuyuki Tobe,Daisuke Matsumoto,Takuma Nagai 한국물리학회 2010 Current Applied Physics Vol.10 No.2
Two topics with dye-sensitized solar cell (DSC) development were introduced. The one was development of an efficient glass–substrate 10 cm-by-10 cm DSC sub-modules with current-collecting Ag grids using N719 dye (gac = 8.0%, Jsc = 16.8 mA/㎠, Voc = 0.71 V, ff = 0.67). Accelerated long-term stability tests were conducted using JIS C-8938 environmental and endurance test methods for amorphous-Si solar cell modules,which included a dry heat cycle test (-40 ℃ to 90 ℃, 200 cycles), a heat–humidity test (-40 ℃ to 90 ℃ with 85% humidity, 10 cycles) and a light-soaking test (255 W/m2 (300–700 nm), 500 h). The results suggested DSC using methoxypropionitrile (MPN) electrolyte solvent has a promising future to commercialization of DSC. The other was development of a new preparation method for highly efficient plastic–substrate DSC. This method consisted of important basic technologies such as press without heat treatment,light-confining effect by light scattering TiO2 large particles, binder-free water paste of TiO2 and UV–O3 treatment of TiO2 photoelectrode. The plastic–substrate DSC prepared by this new method showed a very high efficiency, 8.1% (0.29 ㎠) under simulated solar light (100 mW/㎠, AM1.5). Further,an efficient plastic–substrate 10 cm-by-10 cm DSC sub-module with current-collecting Ti grids using N719 dye (gac = 4.5%, Jsc = 10.9 mA/㎠, Voc = 0.72 V, ff = 0.57) was successfully prepared.
Koneri, Kenji,Hirono, Yasuo,Fujimoto, Daisuke,Sawai, Katsuji,Morikawa, Mitsuhiro,Murakami, Makoto,Goi, Takanori,Iida, Atsushi,Katayama, Kanji,Yamaguchi, Akio The Korean Gastric Cancer Association 2013 Journal of gastric cancer Vol.13 No.1
Alpha-fetoprotein-producing gastric cancer is associated with poor prognosis because of frequent liver and lymph node metastasis. We present a case with synchronous liver metastasis who survived for 5 years. A 69-year-old man with upper abdominal pain was referred to our hospital. Gastrointestinal endoscopy revealed a Borrmann II-like tumor in the lower part of the stomach. Computed tomography revealed a tumor in the left lobe of the liver. Serum alpha-fetoprotein levels were markedly increased. We performed distal gastrectomy after administering oral tegafur/gimeracil/oteracil potassium and administered hepatic intra-arterial cisplatin injection. Liver metastasis showed partial response on computed tomography. Despite left hepatic lobectomy, further metastases to the liver and mediastinal lymph nodes became difficult to control. After sorafenib tosylate administration, stabilization of the disease was observed for 4 months. We conclude that hepatic intra-arterial chemotherapy and oral administration of sorafenib tosylate may potentially improve the prognosis in such cases.