R-12 냉매용 냉동장치의 성능에 미치는 R-12와 R-134a 냉매의 효과

이홍기,장동호,정용진,강형석 강원대학교 산업기술연구소 2000 産業技術硏究 Vol.20 No.B

High pressure, pressure ratio, refrigerating effect, heat transfer from the condenser and the power of the compressor etc. of a self-made refrigeration equipment for R-12 are investigated when R-12 and R-134a are used as the coolants. The comparison between the performance for R-12 and that for R-134a is made. As a result, R-134a is better than R-12 in the view of high pressure, refrigerating effect and the coefficient of performance and vice versa in the view of pressure ratio, exit gas temperature from the compressor and heat transfer from the condenser.

CATIA를 이용한 고속가공용 탭핑머신의 구조해석

권혁홍,김지용,하종국 대진대학교 2002 大眞論叢 Vol.10 No.-

In this study the structure analysis of tapping m/c is developed to improve dynamic characteristics. To this purpose a tapping m/c is mathematically modelled and dynamic response analysis of the model are investigated by use of Finite Element Method(FEM). The investigation procedures are as follows. The finite element modelling of the tapping m/c is done with triangular and rectangular plate elements and each node of the elements has 6 degrees of freedom. And this model is idealized as a forced vibration system under impulse load by cutting force. Model parameters, natural frequency and mode shape, and dynamic response for displacement and stress are analyzed by use of mode superposition method. To reduce computing time of dynamic response analysis, lower vibration mode is analyzed with master-DOF and mass participation factor. In this case maximum relative displacement is occured at 17.483 Hz in the right column.

Cisplatin 병용화학요법시 발생한 오심, 구토에 대한 Ondansetron과 Metoclopramide의 효과에 대한 비교

김미자,국기용,김태원,박유환,김완중,허경,정춘해,홍순표 朝鮮大學校 附設 醫學硏究所 1993 The Medical Journal of Chosun University Vol.18 No.1

Inspite of possible effects for emesis following chemotherapy including cisplatin, nausea and vomiting are the most unpleasant side effects of cancer chemotherapy. None of the currently available antiemetic agents is entirely effective preventing emesis. Ondansetron, a 5-HT(5-hydroxytryptamine)_(3) receptor antagonist, has been shown to be effective antiemetic agent in the control of cisplatin induced emesis. Twenty solid tumor patients who are scheduled to receive cisplatin containing combination chemotherapy participated in a prospectively randomized study to compare the antiemetic efficacy and safety of ondansetron and metoclopramide. Ondansetron was given in dose of 8mg intravenous 30min before cisplatin and then 4hours and 8hours after cisplatin on day 1, and Ⅰ.Ⅴ. every 8hours from day 2 to 5. In the metoclopramide group, metoclopramide was given in dose of 2 ㎎/㎏ intravenous every 8hours from day 1 to 5. The control of emesis was graded in the following way : complete response, no vomiting : major response, 1-2 emetic episodes : minor response, 3-5 emetic episodes : failure, above 5 emetic episodes. Complete or major response of emesis was achieved 10 of 12(83.2%) patients receiving ondansetron and in 5 of 8(62.5%) patients receiving metoclopramide, but effectiveness was not significantly different. Ondansetron was at least as effective as metoclopramide therapy in controlling cisplatin induced emesis. Side effects in ondansetron was less than in Metoclopramide.

비서학 이론형성을 위한 학술용어 혼란의 개선에 관한 연구

홍용기(Yong-Gee Hong) 한국비서학회 1997 비서·사무경영연구 Vol.6 No.-

직장내 성희롱에 대한 영향요인에 관한 연구

홍용기(Yong-Gee Hong),조국행(Kook-Haeng Cho) 한국비서학회 2000 비서·사무경영연구 Vol.9 No.2

The Challenges facing women the issue of sexual harassment in the workplace. Many people spend much of their working lives in organizations thinking about sex or romantic relationships, but very little attention has been paid organizational sexual harassment In recent years, an increasing amount of employment-related litigation has centered on sexual harassment Sexual harassment define the term "unwelcome sexual advances, requests for sexual favor and other verbal or physical conduct of a sexual nature." The guideline are written in such a manner as to make clear beyond reasonable doubt that protection against sexual harassment extends to both male and female employees. In general, the employer can limits its liability by showing that it took immediate corrective action when the sexual misconduct was discovered The following constituted sexual harassment: I can't seem to go in and out of my boss's office without being patted or pinched: my boss told me that it would be good for my career if we went out together. In one incident, a male supervision had a habit of making jokes with sexual overtones to a female subordinate who appeared to take no offense and made complaints. This case study explored about sexual behavior at work, including personal sexual orientation, sexualization of the at work, and workers in male or female dominated jobs, co-worker or supervisor's sexual behavior and attitudes toward sexual harassment. We found that women in personal sexuality oriented, sexualization of workplace, and job position were more likely than other women to label as sexual harassment The result of this have a number of implications for the field of organizational behavior and for managers concerned with sexual harassment in their organizations.

Dynamic Susceptibility Contrast (DSC) Perfusion MR in the Prediction of Long-Term Survival of Glioblastomas (GBM): Correlation with MGMT Promoter Methylation and 1p/19q Deletions

Kwon, Yong Wonn,Moon, Won-Jin,Park, Mina,Roh, Hong Gee,Koh, Young Cho,Song, Sang Woo,Choi, Jin Woo Korean Society of Magnetic Resonance in Medicine 2018 Investigative Magnetic Resonance Imaging Vol.22 No.3

Purpose: To investigate the surgical, perfusion, and molecular characteristics of glioblastomas which influence long-term survival after treatment, and to explore the association between MR perfusion parameters and the presence of MGMT methylation and 1p/19q deletions. Materials and Methods: This retrospective study was approved by our institutional review board. A total 43 patients were included, all with pathologic diagnosis of glioblastoma with known MGMT methylation and 1p/19q deletion statuses. We divided these patients into long-term (${\geq}60\;months$, n = 7) and short-term (< 60 months, n = 36) survivors, then compared surgical extent, molecular status, and rCBV parameters between the two groups using Fisher's exact test or Mann-Whitney test. The rCBV parameters were analyzed according to the presence of MGMT methylation and 1p/19q deletions. We investigated the relationship between the mean rCBV and overall survival using linear correlation. Multivariable linear regression was performed in order to find the variables related to overall survival. Results: Long-term survivors (100% [7 of 7]) demonstrated a greater percentage of gross total or near total resection than short-term survivors (54.5% [18 of 33]). A higher prevalence of 1p/19q deletions was also noted among the long-term survivors (42.9% [3 of 7]) than the short-term survivors (0.0% [0 of 36]). The rCBV parameters did not differ between the long-term and short-term survivors. The rCBV values were marginally lower in patients with MGMT methylation and 1p/19q deletions. Despite no correlation found between overall survival and rCBV in the whole group, the short-term survivor group showed negative correlation ($R^2=0.181$, P = 0.025). Multivariable linear regression revealed that surgical extent and 1p/19q deletions, but not rCBV values, were associated with prolonged overall survival. Conclusion: While preoperative rCBV and 1p/19q deletion status are related to each other, only surgical extent and the presence of 1p/19q deletion in GBM patients may predict long-term survival.

컴퓨터 자동 심전도 판독 시스템이 가정의학 전공의의 심전도 판독에 미치는 영향

김용은,김유선,김청기,김창엽,황인홍,유태우,허봉렬 대한가정의학회 1991 Korean Journal of Family Medicine Vol.12 No.12

유비쿼터스 가상공간을 이용한 가족유대감 극대화 방안 연구

이기원(Gee-Won Lee),홍성용(Seong-Yong Hong) 한국정보과학회 2011 한국정보과학회 학술발표논문집 Vol.38 No.1D

최근 핵가족 및 1인 가구 형태의 주거문화 가속화로 인해 독거노인 건강 및 복지문제, 맞벌이자녀의 양육문제 등이 자연스럽게 대두되기 시작하였고 원격지에 떨어져 사는 가족 구성원간의 커뮤니케이션 기회 상실로 가족 유대감이 점차 저하되면서 뿌리 깊게 이어진 우리나라의 가족 중심문화의 해체현상이 급속화 되어가고 있다. 따라서 본 논문에서는 이러한 사회문제 해소를 위해 광대역 통신망 및 유비쿼터스 기술을 활용하여 원격지 사이의 공간을 하나로 연결하는 가상공간을 구축하여 장소, 시간에 구애 없이 멀리 떨어져 사는 가족 간에 실제 대면하듯이 커뮤니케이션을 하고 정서적 교감을 나눌 수 있는 방안 연구하고 제안하였다. 유비쿼터스 환경은 인간사회에 큰 영향을 줄 것이며, 다양한 기술이 발전하여 언제 어디서나 네트워크를 기반으로 인간과 인간, 인간과 사물 간에 통신이 가능하도록 하는 3차원 커뮤니케이션 공간을 가능하게 할 것이다. 본 연구는 이러한 3차원 커뮤니케이션을 통한 가족 간의 의사소통과 유대감을 높일 수 있도록 가상공간을 활용하는 것에 대하여 제안하였다.

웹기반 원격교육시스템을 활용한 경영학 교육

홍용기,Hong Yong-Gee 대한경영정보학회 2000 경영과 정보연구 Vol.5 No.-

This paper discusses management education by utilizing the cyber education learning system in a web-based. New learning system tools offer great promise for a new contents of management learning. The cyber education learning system a shift from face-to-face lecturing to interactive learning. The situation changes profoundly when information technology becomes develope and education paradigm is shift. By exploiting the digital media. educations, and students, managers can shift to a new, more effect cyber education learning system. The following shift from classic educations to cyber educations learning system: from instruction to construction, from teacher-centered to learner-centered, from school to lifelong, from one-size-fits-all to customized, from teacher as transmitter to teacher as facilitator. Cyber education learning system has an important role to play in management education. Web-based technology is regarded as a general solution to cyber education learning. This study discussed many factors of implementation in cyber education systems and provide utilizing the learning system at main, detail functions. Lastly, management implications of these cyber education utilize are discussed in more detail.

DEA를 이용한 전비 최우수 함정 선발 및 향상 목표 제시

남용근 ( Yong Keun Nam ),김기태 ( Ki Tae Kim ),조성진 ( Sung Jin Cho ),홍윤기 ( Yoon Gee Hong ) 한국경영공학회 2012 한국경영공학회지 Vol.17 No.1

The main purpose of this study is to select the best naval vessel and to present the improvement target for war preparations. This study applies a data envelopment analysis(DEA) using selected variables from the data describing the property of naval vessels. The best naval vessel is selected by evaluating operational efficiency, and the improvement target is presented by evaluating operational inefficiency. This study also use a profiling model for increasing distinction level of efficient naval vessels. The best naval vessel can be decided based on the efficiency and the frequency of appearance of reference groups.