廢CRT의 再活用 工程에서 발생한 슬러지로부터 Y의 회수

田埈美,李在天,鄭鎭己,金南澈 공주대학교 자원재활용 신소재 연구센터 2002 센터사업 성과집 Vol.- No.1

폐CRT의 재활용 공정에서 Panel 유리에 도포 된 형광체의 제거 시 발생하는 슬러지로부터 Y를 회수하는 연구를 수행하였다. HCl 및 NHO_3을 사용하여 Y를 침출하였으며 산 농도, 침출온도, 침출시간, 광액농도가 침출율에 미치는 영향을 조사하였다. 또한 침출액으로부터 Y와 Pb를 침전 법으로 회수하는 실험을 행하였다. 슬러지로부터 HCl 및 HNO_3에 의한 Y의 침출거동은 유사한 경향을 나타내었다. 광액농도를 280 g/L로 하여 90℃에서 3.0M HCl 및 HNO_3으로 침출 하였을 때 시간에 따라 Y의 침출율은 증가하다가 40분 이상에서는 각각 93%, 90%로 일정한 침출율을 나타내었다. 침출액에 H_2C_2O_4을 첨가하여 Y를 회수하였으며 Pb는 Na_2SO_4를 가하여 PbSO_4로 제거하였다. A study on the recovery of yttrium was conducted using the phosphor sludges generated in the recycling process of obsolete CRTs. Yttrium was leached by HCl and HNO_2. The leaching efficiency of yttrium was extensively investigated in terms of acid concentration, leaching temperature and time, and pulp density. Yttrium and lead was recovered from leaching solutions also by precipitation method. The leaching behavior of yttrium was similar in both acids. The leaching efficiency of yttrium for both acids increased with time at the conditions of 3.0M, 90℃, and 280 g/L of pulp density. After 40 minutes, it was saturated to 93% and 90% for HCl and HNO_3, respectively. Yttrium was recovered from leaching acid solution by the addition of H_2C_2O_4 while lead was removed as PbSO_4 by Na_2SO_4.

주류산업의 경쟁력 강화방안

전영길,남기철 한경대학교 2004 論文集 Vol.26 No.1

Korean alcoholic beverage industry has grown to the retail sale of 10 trillion won in 2001. According the 2001 association of Korean alcoholic beverage industry, beer industry took 63.1% of market share, soju 28.8%, takju 5.6% and whisky 0.9% in cubic content. This study is based on the opinion that reasonable improvements need to made in anti-competitive government regulations and an unfair competition distribution in order to strengthen the competitiveness of the alcoholic beverage industry. For the ultimate goal of enhancing objectivity and rationality of competition promotion measures, this study describe the types of government regulations and distribution. The distribution of alcoholic beverage is so complicated and illegally traded alcoholic beverage. Distributors of alcoholic beverage are so small and weak. So distributors of alcoholic beverage have to enhance improvement competitive power. First, they need a organization management and personal as a massive organization and to force the organization management and personal management to systematize. Second, it prevent a illegal distribution to specialize and distinguish in production and business province. The methods of improvement can be suggested for liquor marketing in our country. First, being a large-size merchandising firm and specialization of marketing should be realized. Second, the terms of the present system of license should be reinforced fairly. Third, the regulations of punishment against unlicensed selling agencies and tax evasion agencies should be reinforced and offenders should be regulated strictly. Finally, considering the goods' characteristics that liquor has, the protective movement of consumers should be developed positively.

일부 중소병원 조직구성원의 갈등이 직무만족과 조직몰입에 미치는 영향

임경태,강명근,전재두,박계남,김기순 朝鮮大學校 附設 醫學硏究所 2004 The Medical Journal of Chosun University Vol.29 No.1

Objectives and Method : This study was conducted to identify the influences of conflict among hospital employees on job satisfaction and organizational commitment measured as the result variables of organizational conflict. The data for this study were collected from 305 employees who were employed as a physician, a nurse, an administrative personnel or other hcalthcare professional in 4 medium-sized general hopitals in 2 middle sized cities including Yeosu and Soonchcon. The survey instrument used in this study was a structured questionnaire developed from modifying those of some previous studies, for example, Minnesota Satisfaction Questionnaire for a measure of job satisfaction. Results : 1. The groups experienced relatively high degree of overall intra- organizational conflict were the female, the younger, the non-married or the divorced married, and the college-graduated. And according to the job-related variables, these groups were the lower-salaried employees with a lower job status, 3 or 5 years on their duties, especially the nurses. 2. The degree of conflict experienced by the hospital employees was highest in the intra-organizational conflict due to the factors such as a gap of goals, communication problems and were relatively lower in the conflict due to the factors such as a collective coherence, an interdependence, a leadership problem. And the degree of conflict due to the horizontal relationship with their colleagues was higher than that of vertical relationship with their bosses or subordinates. 3. Comparcd with the degree of conflict according to the general characteristics of our study subjects, the degree of job satisfaction and organizational commitment of them were reverse in that the male, the elderly, the married, the eradnated of praduate school, the physicians, and higher-salaried employees with a higher job status, 6 vears or more on their duties perceived the highest degree of the job satisfaction and the organizational commitment. As a result of correlation analysis, all values of correlation coefficients between the degree of intra-organizational conflict and the degree of the job satisfaction, the organizational commitment were negative. 4. As a result of a multiple regression analysis inputting the variables such as variable general characteristics and job-related variables as the putative confounders, the conflict scores due to the factors such as the communication problems, leadership problems, individual personality were the significant independent variables having negative influence on the overall, intrinsic, and extrinsic components of job satisfaction. 5. As a result of a multiple regression analysis inputting- the variables such as general characteristics and job-related variables as the putative confounders, the conflict scores due to the factors such as an interdependence, leadership problems, and an individual personality were the significant independent variables having negative influence on the score of organizational commitment. And as a result of a multiple regression analysis inputting scores of conflict factors, scores of conflict types, intrinsic and extrinsic components of job satisfaction, and above putative confounders altogether as independent variables, the significant independents having influence on the score of organizational commitment were conflict scores due to the interdependence (β=-0.379; p=0.026), the individual personality (β=-0.716: p=0.000), conflict score from vertical interpersonal relationships (β=-0.555; p=0.019), intrinsic (β=0.097; p=0.000) and extrinsic (β=0.076: p=0.049) components of job satisfaction. Conclusion : Our research had some limitations, which, for example, were an omitting some job related putative confounders such as a daily work loading measured by an individual. But the fact that all the regression models showed hig'h explanatory power suggested the bias due to this problem might be little. And we hope to be conducted more advanced researches with robust theoretical background and precise analytic tools, in this research area.

남성화를 보이는 여성에서 발견된 난소의 Steroid Cell Tumor 1예

조인호,정대훈,박영미,서영진,손영실,정철회,강영미,정수전,김영남,이경복,성문수,김기태 인제대학교 2006 仁濟醫學 Vol.27 No.-

Steroid cell tumor is a rare ovarian sex cord-stromal tumor which accounts for 0.1% of all ovarian tumors. Until now, only 4 cases have been reported in domestic literatures. Steroid cell tumor often secrets testosterone and presents virilization in adult women or precocious puberty in children. Treatment is often performed by surgical removal, adjuvant chemotherapy and radiation, but completely accepted treatment was not existed. We experienced a case of steroid cell tumor, which was manifested by typical virilization in a 43-year old patient, who was previously performed hysterectomy and unilateral oophorectomy. So, we present with a brief review of the literatures.

New high-energy-density GeTe-based anodes for Li-ion batteries

Nam, Ki-Hun,Sung, Geon-Kyu,Choi, Jeong-Hee,Youn, Jong-Sang,Jeon, Ki-Joon,Park, Cheol-Min The Royal Society of Chemistry 2019 Journal of materials chemistry. A, Materials for e Vol.7 No.7

<P>A layered germanium telluride (GeTe) and its C-modified nanocomposite (GeTe-C) are synthesized by a simple solid-state synthesis technique, and their electrochemical behaviors for rechargeable lithium-ion batteries (LIBs) are evaluated. Various <I>ex situ</I> analytical tools are employed to demonstrate the electrochemical Li-insertion/-extraction mechanisms of the electrodes. GeTe during Li-insertion exhibits two-step conversion/alloying reactions, and does not recombine after Li-extraction. Interestingly, although GeTe-C shows the same two-step conversion/alloying reactions during Li-insertion, Ge and Te fully recombine after Li-extraction. Owing to the full recombination reactions by the ongoing Li-cycling, GeTe-C shows excellent electrochemical Li-ion storage performances, such as highly reversible capacities (1st Li-insertion/-extraction capacity: 841/691 mA h g<SUP>−1</SUP> or 1767/1450 mA h cm<SUP>−3</SUP>), extremely rigid cycling durability (capacity retention: 97.8% after 100 cycling), and rapid rate-capabilities (940 mA h cm<SUP>−3</SUP> at 3C-rate). Therefore, the GeTe-C modified with layered GeTe and amorphous C is a promising anode material with a high energy density for high-performance LIBs.</P>

Tetrahedral Anions Selective Fluorescent Calix[6]arene Receptor Containing Urea and Pyrene Moieties

Jeon, Nam-Joong,Ryu, Byung-Ju,Park, Ki-Deok,Lee, Young-Ju,Nam, Kye-Chun Korean Chemical Society 2010 Bulletin of the Korean Chemical Society Vol.31 No.12

관광지의 선택속성이 도시 브랜드 이미지에 미치는 영향

전기흥(Jeon, Ki-Heung),이종관(Lee, Jong Goan),김남기(Kim, Nam Ki) 한국문화산업학회 2014 문화산업연구 Vol.14 No.4

최근 들어 도시 브랜드의 개념은 매우 중요시되고 있다. 도시 브랜드는 자연적인 형성이 아닌 도시에 의미부여를 어떻게 하는지에 달려있다. 비록 자연적으로는 멋지지 않다할지라도 도시의 이미지를 어떻게 구조화하는지에 따라 도시 브랜드의 이미지는 다른 양상으로 나타난다. 이러한 점에서 도시 브랜드는 전적으로 방문객 입장에서 구성되어야 한다. 본 연구에서는 도시 브랜드 이미지 형성을 방문객의 관광지 선택 속성 중심으로 연구를 진행하였다. 본 연구는 관광지 선택속성을 문화적 이미지, 환경의 편의성, 운영 프로그램, 주민의 친절함으로 구분하였다. 그리고 이러한 요인이 관광지 신뢰, 관광지 매력도에 어떤 영향을 미치는지를 살펴보았다. 최종적인 종속변수는 재방문의도이다. 본 연구는 전주시를 방문한 관광객을 대상으로 실시하였다. 조사결과, 관광지 신뢰에는 문화적 이미지, 환경의 편의성, 운영 프로그램, 주민의 친절함이 긍정적인 영향을 미쳤다. 관광지 매력도에는 문화적 이미지, 환경의 편의성이 긍정적인 영향을 미쳤다. 관광지 신뢰는 관광지 매력도에 긍정적인 영향을 미쳤다. 관광지 신뢰와 관광지 매력도는 재방문의도에 긍정적인 영향을 미쳤다. In recent years, it has been importantly recognized as the concept of city branding. city branding depends on not only natural phenomena but also making the meaningfulness of city. Without naturally beautiful things an brand image of the city differently shows up by how to make a structuration of city image. In this perspective, the city brand image should be composed by view of visitors. In this research, the authors studied the brand image formation with the focus on choice attributes of tour sites. The choice attributes are composed of cultural image, environmental convenience, operation program, and kindness of civilians. And the authors investigated how these factors could influence trust of tour sites and attractiveness of tour sites. The final dependent variable is the intention to revisit. Sampling frame is tourists who visited JeonjuHanok Village. As research results, trust of tour sites had positive effects on cultural image, environmental convenience, operation program, and kindness of civilians. The attractiveness of tour sites positively influenced cultural image, environmental, and convenience. Trust of tour sites had positive effect on the attractiveness of tour sites. Both trust and attractiveness of tour sites positively influenced intention to revisit. 최근 들어 도시 브랜드의 개념은 매우 중요시되고 있다. 도시 브랜드는 자연적인 형성이 아닌 도시에 의미부여를 어떻게 하는지에 달려있다. 비록 자연적으로는 멋지지 않다할지라도 도시의 이미지를 어떻게 구조화하는지에 따라 도시 브랜드의 이미지는 다른 양상으로 나타난다. 이러한 점에서 도시 브랜드는 전적으로 방문객 입장에서 구성되어야 한다. 본 연구에서는 도시 브랜드 이미지 형성을 방문객의 관광지 선택 속성 중심으로 연구를 진행하였다. 본 연구는 관광지 선택속성을 문화적 이미지, 환경의 편의성, 운영 프로그램, 주민의 친절함으로 구분하였다. 그리고 이러한 요인이 관광지 신뢰, 관광지 매력도에 어떤 영향을 미치는지를 살펴보았다. 최종적인 종속변수는 재방문의도이다. 본 연구는 전주시를 방문한 관광객을 대상으로 실시하였다. 조사결과, 관광지 신뢰에는 문화적 이미지, 환경의 편의성, 운영 프로그램, 주민의 친절함이 긍정적인 영향을 미쳤다. 관광지 매력도에는 문화적 이미지, 환경의 편의성이 긍정적인 영향을 미쳤다. 관광지 신뢰는 관광지 매력도에 긍정적인 영향을 미쳤다. 관광지 신뢰와 관광지 매력도는 재방문의도에 긍정적인 영향을 미쳤다. In recent years, it has been importantly recognized as the concept of city branding. city branding depends on not only natural phenomena but also making the meaningfulness of city. Without naturally beautiful things an brand image of the city differently shows up by how to make a structuration of city image. In this perspective, the city brand image should be composed by view of visitors. In this research, the authors studied the brand image formation with the focus on choice attributes of tour sites. The choice attributes are composed of cultural image, environmental convenience, operation program, and kindness of civilians. And the authors investigated how these factors could influence trust of tour sites and attractiveness of tour sites. The final dependent variable is the intention to revisit. Sampling frame is tourists who visited JeonjuHanok Village. As research results, trust of tour sites had positive effects on cultural image, environmental convenience, operation program, and kindness of civilians. The attractiveness of tour sites positively influenced cultural image, environmental, and convenience. Trust of tour sites had positive effect on the attractiveness of tour sites. Both trust and attractiveness of tour sites positively influenced intention to revisit.

SSL/VPN 기반 CCTV 보안시스템 설계

이남기 ( Nam-ki Lee ),김만식 ( Man-sik Kim ),전병찬 ( Byong-chan Jeon ),전진오 ( Jin-oh Jeon ),유수봉 ( Su-bong Ryu ),강민섭 ( Min-sup Kang ),임권묵 ( Kwon-mook Lim ) 한국정보처리학회 2009 한국정보처리학회 학술대회논문집 Vol.16 No.2

본 논문에서는 SSL/VPN 터널링 기법을 이용하여 CCTV에서 영상정보를 보호하기 위한 SSL 통신 메카니즘을 제안하고, 제안한 방법을 기본으로한 보안 시스템의 설계 및 구축에 관하여 기술한다. 제안한 보안 시스템(VPN client와 Server) 은 Linux System O/S 인 Fedora 8 버전에서 개발하였으며 사용한 라이브러리는 OpenSSL과 PPTP와 PPP를 사용하였다.

Self-piercing Rivet을 이용한 CFRP/Metal 이종소재 다층접합 평가

전남기(Nam-Ki Jeon),정택언(Taek-Eon Jeong),이세헌(Se-Hun Rhee),감동혁(Dong-Hyuck Kam) 대한용접·접합학회 2018 대한용접학회 특별강연 및 학술발표대회 개요집 Vol.2018 No.4

압연 온도와 압연량이 다른 STS202의 탄성파 특성

남기우(Ki-Woo Nam),전현(Hyun Jeon),이기식(Ki-Sik Lee),탁영준(Young-Joon Tak) 한국동력기계공학회 2021 동력시스템공학회지 Vol.25 No.3