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오길호,장춘서,이기수 金烏工科大學校 産業技術開發硏究院 1999 産業技術開發硏究 Vol.15 No.-
Autonomous objects have capabilities of navigating through the underlying network and performing various tasks at each node. By these powerful capabilities they can be applied to several distributed application areas. Tn this paper, we propose a method for on-line maintenance of distributed software systems by using autonomous objects. In our method, multi-version computation techniques are applied. We think it is very feasible for on-line distributed software maintenance.
마이크로 엔드밀을 이용한 측면가공에서의 공구변형에 의한 가공오차 보상
전두성,서태일,윤길상,장호수 한국공작기계학회 2007 한국공작기계학회 추계학술대회논문집 Vol.2007 No.-
This paper presents an integrated machining error compensation without measuring cutting force in micro end-mill. To compensate machining error, we consider new tool path. In order to determine the compensated tool path, two machining error parameters are defined and modeled using the SEM images. Experiments are carried out to validate the approaches proposed in this paper. In result, we identify the proposed methods are effective to compensate for machining errors.
Gil Su Jang,Du Yun Kim,Nong-Moon Hwang 대한금속·재료학회 2021 ELECTRONIC MATERIALS LETTERS Vol.17 No.2
Effects of sputtering power on the deposition rate and microstructure, crystallinity, and electrical properties of Ag films duringdirect current (DC) magnetron sputtering are investigated. Thin films (~ 100 nm) are deposited at sputtering powers of 10, 20, 50,100, 200 and 300 W and analyzed by field-emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), transmissionelectron microscopy (TEM) and a four-point probe. The film deposited at a sputtering power of 10 W has the lowest growthrate, but the highest crystalline quality, with the lowest full width at half maximum (FWHM) and the lowest resistivity. The filmdeposited at a sputtering power of 200 W has the highest growth rate, and the second best crystalline quality in view of FWHMand resistivity. The film deposited at a sputtering power of 50 W has the moderate growth rate, and the worst crystalline qualityin view of FWHM and resistivity. High-resolution TEM observations reveal that films deposited at sputtering powers of 10and 200 W have far fewer defects, such as grain boundaries, dislocations and stacking faults than those deposited at a sputteringpower of 50 W. Such deposition behavior could be explained by sputtering power, which affected the generation of the chargednanoparticles. And the high quality of films could be obtained at a high deposition rate, in which charge plays an important role.
Gil Su Jang,Seon Mi Ahn,Nong-Moon Hwang 대한금속·재료학회 2022 ELECTRONIC MATERIALS LETTERS Vol.18 No.1
Effects of sputtering power, working pressure, and bias on the growth rate, crystallinity, and resistivity of Ag thin filmsdeposited by direct current (DC) magnetron sputtering were investigated. Thin films were deposited on the substrate underthe electric biases of − 300, 0, and + 300 V for 30 min with sputtering powers of 20, 50, 100, and 200 W and working pressuresof 2.5, 5, 10, and 20 mTorr. Under all sputtering powers, the growth rate of the thin film was increased by the positivebias, whereas it was decreased by the negative bias. For example, the film thicknesses were 345.7, 377.9, and 416.0 nmat − 300, 0, and + 300 V, respectively, at a sputtering power of 100 W and a working pressure of 2.5 mTorr. The bias effectwas enhanced as the working pressure decreased. Considering the change of the film growth rate according to the bias, theamount of negatively charged flux was estimated to be roughly 10%. As the working pressure decreased, the crystallinity ofthe deposited films increased by the positive bias whereas it decreased by the negative bias, which is indicated by the fullwidth at half maximum (FWHM) determined by X-ray diffraction of the Ag (111) peak. The film resistivity had the sametendency. This change in the deposition behavior of the Ag film can be understood as the effect of the charged flux.
Reliability-Based Optimum Tolerance Design for Industrial Electromagnetic Devices
Su-Gil Cho,Junyong Jang,Su-Jin Lee,Kyu-Seob Kim,Jung-Pyo Hong,Woo-Kyo Jang,Tae Hee Lee IEEE 2014 IEEE transactions on magnetics Vol.50 No.2
<P>Principle of tolerance design is receiving increased research focus to determine the optimal tradeoff between manufacturing cost and quality. However, current tolerance designs are not suitable for products such as electromagnetic devices that require high reliability, i.e., a very low failure rate. In this paper, a new tolerance design named as reliability-based optimum tolerance design is formulated and performed to guarantee the high reliability of the products while maximizing manufacturing tolerances. The proposed method quantifies the reliability using reliability analysis, which reflects the tolerance in the tolerance design. To validate the proposed method, tolerance design is applied to two examples: 1) a magnetic circuit ( C -core) and 2) a mass-produced interior permanent magnet motor that contains manufacturing tolerances of permanent magnet.</P>
S-18 : Comparison of RECIST1.1 with RECIST1.0 on Assessment of Response in Advanced Gastric Cancer
( Gil Su Jang ),( Hyo Jung Kim ),( Ho Young Kim ),( Boram Han ),( Dae Young Zang ),( Min Jeong Kim ),( Yun Gu Kang ),( Baek Yeol Ryoo ),( Min Hee Ryu ) 대한내과학회 2013 대한내과학회 추계학술대회 Vol.2013 No.1
Background: Objective assessment of the change in tumor burden is critical component in the evaluation of cancer therapeutics. RECIST (Response Evaluation Criteria in Solid Tumors) guideline version 1.0 (RECIST 1.0) was proposed as a new guideline for evaluating tumor response and has been widely accepted as a standardized measure. With a number of issues being raised on RECIST 1.0, however, a revised RECIST guideline version 1.1 (RECIST 1.1) was proposed by the RECIST Working Group in 2009. There is no report of comparing RECIST 1.1 and RECIST 1.0 for advanced gastric cancer (AGC) since RECIST 1.1 was published. Methods: We studied 65 patients with AGC at Hallym University Sacred Heart Hospital, Anyang, Korea and Asan Medical Center, Seoul, Korea. These patients were retrospectively re-analyzed to determine the concordance between the two response criteria using the ĸ statistic. Result: The number and the sum of tumor diameters of target lesions using RECIST 1.1 were significantly lower than those using RECIST 1.0 (p<0.0001,paired student`s t test). However, there was an excellent agreement in tumor response between RECIST 1.1 and RECIST 1.0 (ĸ=0.844). One patient with partial response (PR) based on RECIST 1.0 was reclassified as stable disease (SD) by RECIST 1.1 and one of two patients with SD by RECIST 1.0 was downgraded to progressive disease and the other was upgraded to PR by RECIST 1.1. Conclusion: RECIST 1.1 provided almost perfect agreement with RECIST 1.0 in assessment of tumor response of AGC. Additional large prospective randomized studies with periodic PET/CT are needed to compare the impact on survival between the two RECIST criteria (1.1 and 1.0).
Kiyoung Jang,Su-Jin Jung,Hong Gil Lee,Nam-Chon Paek,Pil Joon Seo 한국육종학회 2015 한국육종학회 심포지엄 Vol.2015 No.07
Floral transition is influenced by environmental factors such as light and temperature. Plants are capable of integrating photoperiod and ambient temperature signaling into their developmental program. Despite extensive investigations on individual genetic pathways, little is known about the molecular components that integrate both pathways. Here, we demonstrate that the RING finger–containing E3 ubiquitin ligase CONSTITUTIVE PHOTOMORPHOGENIC1 (COP1) acts as an integrator of photoperiod and ambient temperature signaling. In addition to the role in photoperiodic destabilization of CONSTANS (CO), COP1 also regulates temperature sensitivity by controlling the degradation of GIGANTEA (GI). COP1-impaired mutants showed reduced sensitivity to low ambient temperature. Notably, COP1 is more stabilized at low temperature and accelerates GI turnover in a 26S proteasome-dependent manner. The direct association of GI with the promoter of FLOWERING LOCUS T (FT) depends on ambient temperature, and thus COP1-triggered GI turnover delays flowering at low temperatures via a CO-independent pathway. Taken together, our findings indicate that environmental conditions regulate the stability of COP1, and conditional specificity of its target selection stimulates proper developmental responses and ensures reproductive success.