미립액상법을 위한 PECVD 반응로설계

정용선,오근호 한국결정성장학회 1997 한국결정성장학회지 Vol.7 No.2

$YBa_2Cu_3O_x$ 고온 초전도체 상을 MgO 단결정위에 증착시키기 위하여 액상의 에어로 졸 입자를 저온 플라즈마의 화학증기 증착로안에 유입하였다. 플라즈마의 분포를 조절하기 위한 반응로의 설계에 따라 초전도체상의 미세구조가 변화하는 양상을 관찰하였으며, 이때 증착 기판 위에서 관찰되는 입자들의 생성원인에 대하여 고찰하였다. 입자생성의 주된 원인으로는 불안정한 플라즈마의 분포와 출발원료의 낮은 기화속도에 기인하는 것으로 나타났다. 또한 증착속도는 출발원료가 기화되는 곳으로부터 멀어질수록 급격히 감소하는 것으로 밝혀졌다. The high-$T_c$ superconducting phase, $YBa_2Cu_3O_x$, was deposited on the single crystal MgO substrate, using a liquid aerosol feed method in a plasma enhanced chemical vapor deposition(PECVD) reactor. The effect of the plasma distribution depending on the design of a reactor was studied by the analysis of the microstructures of thin films. The particles landed were frequently observed on the films and the two causes that were responsible for the particle deposition were explained. The particles were deposited by the unstable and non-uniform plasma and the low evaporation rate of the precursors. Also, the thin film deposition rate decreased significantly as the distance between the evaporating location and the substrate increased.

학술행사 : 심포지엄 2 / 여성의 고용문제와 남 녀의 고용평등법 ; 부록 1 / 여성학 강의요목 ( 1 , 2 학기 ) ; 가정과 여성

정용선 부산대학교 여성연구소 1989 여성학연구 Vol.1 No.1

N/A N/A

치성감염에 의한 하행 괴사성 종격동염: 증례보고

정용선,채병무,조현주,김소현,정태영,박상준,Jeong, Yong-Seon,Chae, Byung-Moo,Jo, Hyun-Joo,Kim, So-Hyun,Jung, Tae-Young,Park, Sang-Jun 대한악안면성형재건외과학회 2010 Maxillofacial Plastic Reconstructive Surgery Vol.32 No.6

Descending necrotizing mediastinitis (DNM) is a complication of odontogenic or oropharyngeal infections that can spread to the mediastinum. Such infections is serious, leading to sepsis and frequently to death. Even in this era of antibiotics, the mortality rate associated with DNM is approximately 40%. It is difficult to diagnose early because clinical and radiologic findings appear in the late stage of the infection. Delayed diagnosis is the principal reason for the high mortality in DNM. Therefore, descending necrotizing mediastinitis requires an early and aggressive surgical approach to reduce the high morbidity and mortality associated with this disease. We experienced a case of odontogenic infection followed by acute mediastinitis, so present now with the review of literatures.

루프를 이용한 근거리 RFID 리더 안테나

정용선,자르갈사이칸 나이암바얄,신봉섭,고형석,안병철 한국정보기술학회 2014 한국정보기술학회논문지 Vol. No.

This paper proposes a near-field RFID reader antenna based on a loop. The proposed antenna consists of a loop loaded with inductors and resistors, a top ground plane for adjusting the far-field gain, a balun and a metal housing. The near magnetic field is generated by a loop consisting of a circular wire and two orthogonal linear wires. Four inductors are placed on the loop to reduce the loop size and four resistors are used to obtain an impedance matching and to control the near magnetic field strength. A ground plan is placed around the loop to reduce the far-field gain of the antenna. A special balun structure is employed to reduce the radiation from the feeding coaxial cable. The loop and the feeding coaxial cable are placed in a metal housing to produce the near magnetic field only in the region just above the antenna. The antenna is optimally designed using a commercial software, then fabricated and tested. The fabricated antenna has a reflection coefficient less than -10dB over 903-921MHz, a far-field gain of -14.5dB, an H-field of 0.38A/m at 40mm above the antenna surface and a tag read distance up to 630mm when a power of 25dBm is supplied to the antenna. 본 논문에서는 루프를 이용한 근거리 RFID 리더 안테나를 제안하였다. 제안된 안테나는 인덕터와 저항으로 장하된 루프, 원거리 이득 조정용 상부 접지판, 벌룬 및 금속 하우징 등으로 구성된다. 근거리 자기장은 원형 도선과 2개의 교차 도선으로 구성된 루프에 의해 생성된다. 루프 상에 4개의 인덕터를 배치하여 루프의 크기를 소형화하였으며 4개의 저항을 사용하여 임피던스 정합을 얻고 동시에 근거리 자기장 세기를 조정하였다. 루프 주위에 접지판을 배치하여 안테나의 원거리 이득을 감소시켰다. 동축 급전선에 의한 방사를 억제하기 위해 특수한 벌룬 구조를 적용하였다. 근거리 자기장이 안테나 바로 위 영역에서만 생성되도록 루프와 급전 동축선을 금속 하우징 내에 설치하였다. 상용 소프트웨어를 이용하여 안테나를 최적 설계한 후 이를 제작하여 시험하였다. 제작된 안테나는 903-921MHz에서 -10dB이하 반사계수, -14.5dB의 원거리 이득을 보였으며, 25dBm의 전력 인가 시 안테나 표면으로 40mm 떨어진 위치에서 0.38A/m의 자기장 세기, 630mm의 태그 인식거리를 보였다.

논문편 : 혼수의 사회적 의미 및 혼수가 결혼생활에 미치는 영향 : 사회교환이론적 접근

정용선,김경연,김득성 ( Yong Sun Chung,Kyong Yeon Kim,Deuk Sung Kim ) 대한가정학회 1995 Family and Environment Research Vol.33 No.6

미립액상 분말에 의한 $YBa_{2}Cu_{3}O_{x}$ 초전도체의 PECVD 증착법

정용선,오근호 한국결정성장학회 1996 韓國結晶成長學會誌 Vol.6 No.2

액상의 미립자를 이용하여 저온 플라즈마 반응로 안에서 $YBa_{2}Cu_{3}O_{x}$ 초전도체상을 MgO 단결정 위에 in-situ 증착하였다. 금속화합물의 용해도, 분해온도와 용매의 증기압이 이공정 방법에서 중용한 인자로 나타났으며, 초전도체상의 증착실험 조건은 산소분압이 0.3에서 2.7 kPa, 증착온도가 $800^{\circ}C$에서 $940^{\circ}C$까지이었다. 초전도체상을 위한 최적의 증착조건은 CuO 상전이선에 근접하게 나타났다. The superconducting phase, $YBa_{2}Cu_{3}O_{x}$ (YBCO), was in-situ deposited on the single crystal MgO substrates, using an aerosol decomposition process in a cold plasma reactor. The solubility and decomposition temperature of the chemical precursors, and the vapor pressures of the solvents, were determined to be the factors crucial to achieving a stoichiometric, crystalline YBCO phase. The deposition parameters for the YBCO phase were 0.3 to 2.7 kPa for the oxygen partial pressure and $800^{\circ}C$ to $940^{\circ}C$ for the substrate temperature. The optimum deposition conditions for the YBCO phase were observed along the CuO decomposition line.

종합대학 도서관장서의 적정량기준 설정에 관한 고찰 -미국의 종합대학도서관기준을 중심으로-

정용선,Chung Young Sun 한국문헌정보학회 1981 한국문헌정보학회지 Vol.8 No.-

Library standards have been the source of considerable controversy, whereas many problems are involved in developing stardard for university library collections. For evaluation purposes, standards should be precise, quantifiable and measurable. In the United States, however, standards for academic libraries are limited to qualitative statements and principles. Quantitative standards, when given, are ususally related to the number of population in the institution being served, or the prescribed quantitative objectives are often arbitrarily formulated by value judgements. The study in this paper attempts to explain the problems involved in developing quantitative standard for academic library collections. Two problems facing in the formulation of the optimal size of collection are identified. One is the theoretically faulty concept of adequacy of collection to meet the situations of diversity of university libraies, and the other is the difficulties in quantification and measurement, along with the lack of concept of adequacy of collection. However, quantification of adequate size of collection is proved to be useful on the pratical level, even though not valid theoretically. ACRL, Clapp/Jordan and Voigt developed formulas or models for setting the optimal size of a library collection for any particular university library. The main purpose of this study is the analysis of the above formulas. ACRL standard was drawn from obervation and analysis of statistcs in leading library collections. In academic field, this judgement appears to have been based on the assumption that a high-grade institution would be apt to have a good library collection. This study criticizes ACRL standard for its failure to include some determinants of measurements, and points out the limitations of the standard. In contrast. Clapp/Jordan developed a formula rather scientifically based upon bibliographical sources. This is similarly empirical but has the advantage of bringing into play the elements which make universities diverse in nature. Both ACRL and Clapp/Jordan formulas share two major defects. (1) the specific subject needs of the collection are not indiacted directly, and (2) percentage rate of growth is an indicator in measuring the potential utility of a collection. Thus both formulas failed to provide a basis for meaningful evaluation. Voigt further developed a model for determining acquisition rates for currently published materials based on bibliographic technique. Voigt model encourages experimentation with different programs and different allocations of input resources, designed to meet the needs of the library's particular population. Standard for university library collections can be formulated in terms of input(traditional indicator), or additionally, in terms of output(cost-effectiveness). Cost effectiveness is expressed as user satisfaction, ability to provide wanted materials within a reasonable time period. Thus simple quantitative method does not cover all the situations of diversity of university library collections, nor measures the effectiveness of collections. Valid standard could not be established without further research.

도자기 유약용 wagnerite의 합성 및 발색원소의 영향

정용선,오근호 한국결정성장학회 1998 韓國結晶成長學會誌 Vol.8 No.1

치환에 의한 wagnerite의 색상변화 및 고용체 형성한계를 살펴보기 위해 wagnerite ($A_2XO_4Z$)를 합성한후 각 구성원소들을 치환하였다. Ca-wagnerite의 Ca 대신에 Mg, Co, Ni, Cu로 치환하여 용해도가 한정된 고용체를 얻었다. 이들 중 (Mg,Ca)-wagnerite와 (Co,Ca)-wagnerite의 경우에만 단일상의 wagnerite를 합성하였으며 이들의 색상은 각각 백색과 자주색이었다. 그 외의 조성 및 (Ni,Ca)-wagnerite와 (Cu,Ca)-wagnerite의 경우에는 여러상이 혼재해 있는 것으로 나타났다. $A^{5+}$자리에 Li을 치환해 보았으며 또한 $X^{5+}$대신 V을 치환하여 진한 자주 및 금색, 옅은 노란색의 wagnerite를 합성하였으며, Z- 대신 Cl을 치환한 경우 단일상의 wagnerite을 얻지 못하였다. In order to investigate the color variation and the solubility limit in wagnerites by metal ion substitution, wagnerite ($A_2XO_4Z$) was synthesized and then, substituted by coloring metal ions, especially $CO^{2+},Ni^{2+}$ and $Cu^{2+}$ ions. When calcium was replaced with Mg, Co, Ni and Cu divalent ions, solid solutions were formed with a limited solubility. Single phase wagnerites were synthesized by the substitution of Ca with Mg and Co, and their colors were white and purple, respectively. Substitutions with $Li^+$ were succeeded in the specific composition and the substitution of vanadium for $X^{5+}$ were attempted, resulting in the wagnerites of dark purple, dark gold and light yellow colors. The substitution of chlorine was, also, attmepted for the fluorine site.

아동전문병원 입원환아 부모의 병원서비스 만족도

정용선,김진선 한국아동간호학회 2005 Child Health Nursing Research Vol.11 No.3

Purposes: The purposes of this study were to evaluate parent satisfaction with inpatient hospital services in children's hospitals and to identify variables related to parent satisfaction. Method: A descriptive correlation study was conducted. Parents of 165 children who were inpatients in two children's hospitals participated in the study. Data were collected using structured questionnaire at the time of discharge. For statistical analysis, t-test, ANOVA, and Pearson correlation analysis were used. Results: The highest parent satisfaction domain was nursing service, and the lowest parent satisfaction domain was hospital service and accommodations. Parents were less likely to be satisfied with hospital facilities, equipment, noise and cleaning and less likely to be satisfied with the lack of information they received and with the lack of communication with health care professionals. Parents with longer length of stay and with older children reported higher satisfaction than their counterparts. Moreover, parent satisfaction was related to their intention to revisit and related to intention to recommend this surveyed hospital over others. Conclusions: Efforts to improve parent satisfaction in children's hospital service and accommodation are needed to improve the quality of health care. Communication by health care professionals with parents and a partnership between parents and health care professionals are necessary to improve quality of care.

영미목록규칙 제2판의 개정규칙과 변경사항에 대한 고찰

정용선 韓國圖書館學會 1980 圖書館學 Vol.7 No.1

The second edition of the Anglo-American Cataloguing Rules (AACR 2) was published in December 1978. In 1974 representatives of five bodies from Canada, the United Kingdom and the United States established the Joint Steering Committee for Revision of AACR, and set the aims, structure, and content of AACR 2. Although the goal of a single text for Britain and North America was achieved in AACR 2, the American library community expressed concern about cost-effectiveness of adoption of the new code, and consquently the LC implementation plan called for some minor departures from AACR 2. LC's plan to depart from a number of provisions of the new code will cause a continuation of the problems presented by past practices of superimposition. The purpose of this paper is to examine the revisions made in AACR 2 in the hope that it will contribute to efforts of Korean librarians seeking to focus on the major questions requiring discussion and decisions before adoption of AACR 2 by Korean research libraries who have already Anglo-American Cataloging Rules for Western materials. In this paper attempts were made to follow the order of subjects treated in the code, beginning with general revisions, followed by a discussion of each of the parts of the code, the first for bibliographic description and the second for choice and form of access points. The differences between AACR 1 and AACR 2 that will be most significant to cataloguers are compared with examples. Comparative analysis of optional and alternative rules are viewed from a historical background, and their practical applications for the different types of libraries / or materials are discussed. Specifications of the options adapted by the Library of Congress are presented. Adaption of AACR 2 poses continual problems in Korea. It is very important to maintain consistent sets of information consistently presented in the catalogue regardless of its language. The recognition by cataloguers of the urgent need for conformity and campatability of catalogue between Western materials and Oriental materials is recommended, if AACR 2 is to be adapted. It would be intolerable for the catalogue users, if different standards of description and headings were to apply in the same catalogue