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윤장상 서울産業大學校 1999 논문집 Vol.50 No.2
In this study, it is analyzed that an electromagnet whose generating force is proportional to constant current through coil in its operating range. To find arelation between magnetic force and the structure in electromagnet, computer simulation method is used by permeance modeling method. When the electromagnet is applied to flow control valve, the relation between input current and flow is found. In order to get a reliability of computer simulation, the simulation results are compared to the experimental result. As the simulation is processed repeatedly, it is found that the gap size between plunger and guide steel and the length of tapered brass ring are important factors in electromagnet.
Butyl acetate-MEK 혼합용매를 이용한 초산분리에 관한 연구
장윤식,황승순,박동원 동아대학교 환경문제연구소 2000 硏究報告 Vol.23 No.1
We studied on the phase equilibria of quaternary liquid-liquid extraction system containing acetic acid-water-binary solvent at 25℃, MEK-butyl acetate were used as binary solvents. Binodal curve, tie-line, distribution and selectivity for each quaternary system have been determined in order to investigate the effect of using binary solvent in extracting acetic acid from aqueous solution. And these experimental tie-line data were also compared with the values predicted by WAC model. It was shown that UNIFAC model is capable of predicting the tie-line in these quaternary systems within an average RSDM of 3.76 mol%.
장지영,오윤경,천지선 朝鮮大學校 附設 醫學硏究所 2009 The Medical Journal of Chosun University Vol.33 No.S
Purpose: To evaluated the efficacy of radiotherapy in the nonmelanoma skin cancer. Materials and Methods: Eleven patients were diagnosed as non-melanoma skin cancer of the head and trunk. There were 9 women and 2 men. The mean age was 70 years with a range of 35 years to 93 years. Seven patients had squamous cell carcinoma and 4 patients had basal cell carcinoma. The mean tumor size was 3.1 cm (range 1 to 8 cm). All patients were treated with 6-megavoltage X-ray radiotherapy. Mean biological effective dose (BED₂) was 50.9 Gy/43 days (range: 37.5 to 59.4 Gy). Median follow-up period was 49 months (range: 18 to 107 months). Results: The local tumor control was 100% and median disease free survival time was 30 months. Local recurrence was noted in 3 patients and distant metastasis in 1 patient. Affecting factor in local recurrence was only radiation dose. By BED₂, median survival time was 30 months for ≥45 Gy and 12 months for <45 Gy (p=0.027). Radiotherapy related chronic complication was observed in 1 patient. Conclusions: High energy X-ray radiotherapy is an effective and safe treatment for nonmelanoma skin cancer, although the number of patients is small.
건축설계실무와 의사결정에 관한 사례 연구 : 공공프로젝트의 경우 Case of Buchon Welfare center and Yonsu Sub-municipal Office
장성준,서윤영,이현창,하종수 명지대학교 대학원 1997 대학원논문집 Vol.1 No.-
The study analyzes a series of decisions made by Building Construction Review Committee on public building construction project. Several government authorities are engaged on the review and required the building client authority to revise the design according to revise items suggested by the committee members ranging from Architectural Planning to other Building Engineering fields. The study delves the legal and design aspects of the review, the meaning of private, semi-public and public function of building, and the construction policy. Two Public building projects were analyzed in terms of revise items. We found some patterns of problem and the current review system works to promote technical aspect of the building and to keep public entity of the projects.
갈조식물 뜸부기(Pelvetia siliquosa)의 영양기관 및 생식기관의 저장물질
윤장택,신종암 여수대학교 1998 論文集 Vol.13 No.2
The reserve substances of Pelvetia silipuosa, which were collected at Sunyoo island, western coast of Korea, in May 4, 1998, were investigated by using the vegetative and reproductive organs. The differences between receptacles and growing branches constituents were observed. Receptacles had a higher content of water, but they had two times lower content of ash than growing branches. The protein content of growing branches and receptacles were 6.87±0.69g and 6.56±0.41g, and the glucose 319.3±15.8㎎/100 g and 377.7㎎/100g. The laminarin of receptacle were 22.86±0.81g/100g and growing branches were 22.41±0.69g, which contained the highest of all constituents. The mannitol were 7.67±0.12g and 6.63±0.32g in receptacle and growing branches.
윤태화,이장희 한국세무회계학회 2004 세무회계연구 Vol.14 No.-
본 연구는 기업의 특성에 따라 법인세평준화 현상에 차이가 있는지를 검토하였다. 선행연구결과를 고려하여 비세금비용에 중요한 영향을 미칠 것으로 예상되는 기업규모, 부채비율, 기업지배구조를 기업특성변수로 선정한 후 이 세가지 기업특성변수와 간접감면을 이용한 법인세평준화 성향간의 관계에 대한 실증가설을 설정하였다. 실증분석결과에 의하면 기업은 기업규모가 클수록 법인세평준화 성향이 큰 것으로 나타났고, 기업지배구조도 법인세평준화 성향에 영향을 미치는 것으로 나타났다. 그러나 부채비율에 따른 법인세평준화 성향간에는 유의적 차이가 없는 것으로 나타났다. 법인세 평준화척도값을 자산총액으로 표준화하여 회귀분석으로 추가분석하였으나 F-값은 통계적으로 유의하지 않았고 설명력도 매우 낮은 것으로 나타났다. 민감도분석을 한 결과에 의하면 기업규모는 법인세평준화에 영향을 미치는 것으로 나타났고, 부채비율과 기업지배구조는 법인세평준화에 영향을 미치지 않는 것으로 나타났다. 실중분석모형과 민감도분석모형의 결과를 보면 기업규모는 선행연구에서와 같이 일관적으로 법인세평준화 성향에 영향을 미치는 것으로 나타났으나 기업지배구조는 선행연구들과 마찬가지로 일관적인 결과를 얻지 못했다. 부채비율에 따른 법인세평준화 성향은 회귀계수의 부호가 달라 유의적 차이가 없는 것으로 모든 모형에서 일관적으로 나타났다.
장윤식,박동원 동아대학교 생산기술연구소 2001 生産技術硏究所硏究論文集 Vol.6 No.1
Due to the rising cost of energy, new separation processes based on extraction are becoming more attractive than before. Thus, the need for claculating and predicting liquid-liquid equilibria(LLE) compositions has very much increased. The purpose of this study is to determine the binodal curves, tie-lines, plait-point, distribution and selectivity for the ternary systems of acetic acid-water with methyl ethyl ketone(MEK), methyl isobutyl ketone(MBK), ethylacetate(EAc), butylacetate(BAc), toluene and o-xylene as solvents at 25℃. And those tie-line data were used to examine thermodynamic consistency. The experimental tie-line data were correlated with NRTL and UNIQUAC models.