Influence of Gas Nitriding on the Damping Capacity of Fe‑17Mn Alloy

Seon‑Min Choi,Ji‑Sook Park,Kyongjun An,이영국 대한금속·재료학회 2019 METALS AND MATERIALS International Vol.25 No.1

Fe-17Mn alloy has been attracted as a high damping alloy due to its excellent damping capacity and tensile properties. For itsindustrial application, it is necessary to improve both wear resistance and anti-oxidation. To solve this problem, gas nitridingwas performed at 520 °C for 10 h using cold-rolled specimens. The nitrided specimen revealed a thick nitride layer of~ 68 μm with ~ 20%Mn and a hardness value of ~ 650 Hv on the matrix of ε martensite and γ austenite without the diffusionlayer. The damping capacity of the nitrided specimen was decreased with increasing the thickness ratio of nitride layer tomatrix. However, when the thickness ratio was ≤ 1.5%, the damping capacity of the nitrided specimen was similar to that ofthe nitride-free specimen. This indicates that the wear resistance and anti-oxidation of Fe-17Mn alloy can be improved bya thin nitride layer without the loss of its damping capacity.

노부모와 기혼자녀간의 생활감정연구 : A Comparison of the aged living with their sons and those living with their daughters 아들동거노인과 딸동거노인의 비교

장선주,서병숙 漢陽大學校 韓國生活科學硏究所 1991 韓國 生活 科學 硏究 Vol.- No.1

The purpose of this study is to analyze the desirable life emotion betwen old parents and married children. The focus was particulary been laid on the investigation of the life emotion between the aged living with their married sons and those living whith their married daughters. For the purpose of this study.340 odd people living in Seoul were chosen for interview. of those 327 intervieweers, 203 the aged who live with their sons and 124 the aged who live with their daughter were finally selected for the survey. The data were analyzed by means of statistical methods such as frequency distribution, Chisquare test, T- test, ANOVA, The major findings of this study can be summarized as follows : 1.More old parents live with their married sons than with their married daughters. Also was found that they live with their eldest married sons or daughters and that they keep a normal relation with their married sons, and an emotional relation with their married daughters. This shows that more people will live with their married daughters than with their married sons in the future. 2.The facts which affect the relation between old parents and their married children are age, sex, religion, marital status, educational background, health condition. These facts prove that they may improve the life interchange with their married children through such deliberate effects as the life-long marriage life with their spouse, the maintenance of health, and the religious life. 3.The affection relation between old parents and the married children was found to be high and the conflict between them was found to be low. Those who live with their married daughters especially showed" a higher rate of love relation, and a lower rate of conflict than those who live their married sons. Furthermore, the aged people were more satisfied with emotional and kindly daughters than with normal married sons.

병원 근로자들의 고용형태에 따른 직무 스트레스와 삶의 질의 관계

전은숙,이강숙,이선영,유재희,홍아름 大韓産業醫學會 2009 대한직업환경의학회지 Vol.21 No.1

목적 본 연구는 병원에 종사하는 정규직 비정규직 근로자의 직무스트레스와 삶의 질 수준을 파악하고 직무스트레스와 삶의 질과의 관련성 및 삶의 질에 영향을 미치는 요인을 규명하기위해 수행되었다 방법 자기기입형 설문조사를 실시하였으며 정규직 172명 비정규직 189명이 최종 분석하였다 일반적 특성과 한국인 직무스트레스 측정도구-단축형 (Korean occupational stress scale short form) 삶의 질 측정을 위한 도구 WHOQOL-BREF를 사용하였다 결과 정규직에 비해 비정규직에서 직무스트레스 수준이 높았다 정규직은 직무요구도와 직장문화의 항목에서 비정규직은 직무자율성 직무불안정성 보상부적절의 항목에서 직무스트레스 요인이 유의하게 많았다 삶의 질수준은 정규직 근로자에서 유의하게 높았으며 심리적 영역 사회적 영역 생활환경 영역에서 비정규직보다 유의하게 높은 수준을 보였다 결론 정규직과 비정규직 근로자의 직무스트레스 요인과 삶의 질 수준은 달랐다 고용형태를 막론하고 직무스트레스는 삶의 질에 부정적인 영향을 미치고 있었으며 비정규직은 직장문화로 인한 스트레스 요인이 많을수록 삶의 질이 낮았다 따라서 병원근로자의 삶의 질 향상을 위하여 적절한 관리 혹은 프로그램이 제공되어야 할 것이며 특히 비정규직 근로자의 직무스트레스를 일으키는 요인들에 대한 적절한 관리가 필요할 것이다 Objective This study was conducted to evaluate the relationship between job stress and quality of life for hospital workers by type of employment Methods Data were obtained for 361 workers in a large hospital 172 of whom were categorized as typical workers defined by permanent employee and 189 of whom were categorized as atypical workers defined by fixed term contraction Job stress was assessed using the Korean Occupational Stress Scale Short Form and the World Health Organization Quality of Life-BREF Questionnaire Results Atypical workers had significantly higher scores for job related stress in the domains Of insufficient control over work job insecurity and lack of reward in the workplace compared with typical workers who had higher scores for stress in the domains of job demands and occupational climate Test scores also indicated that typical workers had a significantly better quality of life than atypical workers especially in terms of mental health social relationships and environment Conclusion These findings suggested that factors contributing to job-related stress were different between typical and atypical hospital and typical workers are likely to have a better quality of life

신생아 마사지가 신생아의 성장과 행동상태 및 어머니의 산후우울에 미치는 영향

윤선진,박인숙 충남대학교 간호과학연구소 2008 충남대 간호학술지 Vol.11 No.1

Purpose: This study has been conducted on the nonequivalent control group pretest-posttest design in quasi experimental basis to identify the effects of infant massage for infant on growth, behavioral state and postpartum depressio. Methods: The subjects of this study were mothers and their infants who were admitted to one postpartum care center located in Daejeon City between October 4, 2004 and January 30, 2005. In data analysis, SPSS Win. (ver11.5) program was utilized and data were analyzed using Χ²-test, t-test and repeated measures of ANOVA. Result: there was a statistically significant difference in the body weight gain(t=2.828, p=.007)and chest circumference increase (t=2.1221, p=.040) arcumference increaseafter 4 weeks between experimental group which is provided infant massage and control group In the aspect of behavior status, the experimental group showed statistical significance by showing conversion to a positive state after massage given than the control group(139.303, p=.001). The depression score increase in both experimental and control groups. But there was no statistically significant difference between two group(t=0.521, p=.608). Conclusion: infant massage it could be applied with systemic nursing intervention plan for the growth and development of infant.

청소년이 지각한 가족기능과 희망과의 관계

우선혜,노지영,박영숙 韓國學校保健學會 2005 韓國學校保健學會誌 Vol.18 No.1

Purpose: This Study a descriptive correlation survey with the purpose of identifying the relationship between family function and hope in adolescents. It was done to provide basic data for developing family centered nursing strategies to promote adolescents' hope. Methods: The subjects of this study were 1030 high school students in J city. Data were analyzed with SPSS 10.0 program. Frequencies and percentages were used to compare the subjects' general characteristics. Minimum values, maximum values, mean scores and mean grades were used to identify the level of family function and hope. Pearson's correlation coefficient was used to analyze the relationship between family function and hope in adolescents, and t test, ANOVA, and Scheffe test were used to examine the level of family function and hope by general characteristics. Results: 1. The level of adolescents' family function ranged from 26 to 97, the mean score was 66.85±13.16, and the mean grade was 2.76±0.52. 2. The level of adolescents' hope ranged from 55 to 153, the mean score was 111.48±17.64 and the mean grade was 2.78±0.44. 3. It showed that there is a significantly positive correlation (r=0.546, p=.000) between adolescents' family function and hope. That is, the better family function adolescents have, the higher level of hope they have. 4. Adolescents' family function showed significant differences according to school record (F=6.363, p=.002), school life satisfaction (F=4.922, p=.007), father's education (F=2.640, p=.048), mother's education (F=3.586, p=.013) and domestic economy status(F=3.022, p=.049). 5. Adolescents' hope showed significant differences according to religion (t=2.018, p=.044), school type (t=2.567, p=.010), school record (F=9.712, p=.000), school life satisfaction (F=11.367,p=.000), father's education (F=4.632, p=.003), mother's education (F=4.709, p=.003), domestic economy status (F=4.235, p=.015), relationship with friends (F=8.187, p=.000), and subjective health condition (F=5.490, p=.001). Conclusion: First, in order to improve adolescents' family function, which encourages hope in adolescents, it is necessary to develop nursing interventions and to make further studies. Second, it is necessary to develop instruments for improving Korean adolescents' family function and hope. Third, further studies are required to improve adolescents' family function and hope in special situations such as disease, drug abuse and juvenile delinquent.

개상한 의치상의 전단굴곡강도 변화

김선영,방몽숙 전남대학교 치과대학 1999 전남치대논문집 Vol.11 No.1

The purpose of this study was to evaluate the effect of proportional thickness of various reline materials on the transverse strength of denture base. The denture base resin used in this study was Vertex RS??(Dentimex Zeist., Holland). The reline resins used were Tokuso rebase?? normal set (Tokuyama Corp., Japan), Rebaron??(GC Corp., Japan), Kooliner^TM(GC INC., U.S.A), New truliner^TM(Harry J. Bosworth Co., U.S.A). The bulk specimens with 2.5 mm thickness of denture base were prepared as the control group. Group 1 was fabricated with 2.0 mm thickness of denture base and 0.5 mm reline material, group 2 with 1.5:1.0 mm, group 3 with 1.0:1.5 mm, group 4 with 0.5:2.0 mm composition. Measurements of transverse strength were taken for each specimens. The results were as follows: 1. Regardless of the reline resin type, the transverse strength of denture base was decreased after reline procedure. 2. The transverse strength according to the reline resin type was decreased in the following order Rebaron, Tokuso rebase, Kooliner, and then New truliner and there was a significant difference among the reline materials(P<0.05). 3. The strength of the relined denture base generally decreased as the proportional thickness of the denture reline material increased. These results suggest that increasing the proportional thickness of the reline material progressively decreased the strength of the relined denture base. Thus, the denture base should not be unnecessarily altered during the reline procedure.

영어전제에 관한 화용론적 분석

김지숙,양선기 順天大學校 1997 論文集 人文社會科學篇 Vol.16 No.-

ABSTRACTIn the semantic view, presupposition is defined in terms of the truth value condition. This does not directly involve the speakers, the hearers or the contexts in which the sentence is uttered. The pragmatic view involves the speakers, the hearers and the contexts. That is to say, an utterance of a sentence pragmatically presupposes that its context is appropriate. Under these concepts of presupposition, the purpose of this paper is to suggest that pragmatic presupposition is superior to semantic presupposi- tion in explaining the limits of semantic presupposition through cancellation, scope of negation and intuition, etc. In conclusion, this paper reveals that the notions of prag- matic presupposition should play an important role in the interpretation of meaning, and that much more data are possibly dealt with in terms of pragmatic presupposition than of semantic presupposition.

사무공간의 통합유니트 구축을 위한 조명유니트 도출에 관한 연구

김선숙,신선준,김지현,양인호,김광우 대한건축학회 2005 대한건축학회논문집 Vol.21 No.1

The purpose of this study is to develop the lighting units for workspace and to propose their application method at the architectural design stage The lighting unit is one of the components of a workspace integrated unit, which can be defined as the planning unit satisfying the environmental comfort criteria of workspace According to the survey of current domestic and foreign office buildings, the luminaire layout types could be classified into the line, spot and square type Various simulation cases were set up considering these layout types, architectural modules, and luminaire types Finally, forty-four lighting units were developed by RADIANCE simulation With these lighting units, the designer would be able to easily predict how his decision about architectural modules influences the lighting design, and can consider other alternatives

당의 종류 및 첨가량을 달리한 깨다식의 품질특성

김진숙,한영실,유선미,김행란,전혜경 한국조리과학회 2003 한국식품조리과학회지 Vol.19 No.3

깨다식의 감미 및 물성 등의 개선을 위해 꿀보다 높은 점도와 hardness를 가지는 쌀엿과 조청 등을 첨가 혼합하여 품질을 조사한 결과를 요약하면 다음과 같다. 깨다식의 적정 재료 배합비는 깨가루 100 기준시, 꿀과 쌀엿의 동량 혼합액 50%(w/w)였으며, 이를 기준으로 제조한 깨다식의 이화학적 특성은 당도 17.44 brix˚, tnqns 12.16, 환원당 15.44, 단백질 12.88, 지방 32.02, 조회분 2.82 %이었고, 기계적 특성 중 TPA의 chewiness는 0.28~0.30, hardness는 27.22~27.44 g/㎠이고, 색도의 L값은 41.67, a값 4.58, 그리고 b값은 16.99였다. This study was carried out to investigate the effects of the addition of sweeteners to Sesame Dasiks. Sesame Dasiks were prepared by adding various sweeteners to sesame seeds powder, at 40, 50, 60 and 70%, and their quality characteristics were measured. In the chewiness and hardness analyses of Sesame Dasiks, the 50% group (the same ratio and mixture of honey and lire jelIy) gave the highest results. For the sweetness, taste and overall acceptability of the Sesame Dasiks, the 50% group was also the better The texture profile analyses found the optimal chewiness and hardness of the Sesame Dasik to be 0.28 ~ 0.30 and 27.22 ~ 27.44, respectively.

노인단독가구의 지역사회 건강관리 프로그램 개발

권영숙,이선자 노인간호학회 2005 노인간호학회지 Vol.7 No.2

Purpose: As a preparation for the increase in the number of the aged families, this study was carried out to present health care programs in accordance with the level of self care need of the old of the aged families in one city. Methods: The home visiting survey to the aged families and the documents analysis of the elderly health service of public health centers were investigated. Results: With respect to the self care requisites, the programs were identified to be necessary which are for the improvement of family function, cognitive capability, eyesight and for the control of depression and pain, health education. Conclusion: The developed programs were divided to 'wholly intervention programs', 'partially intervention programs', 'educative-supportive programs'. They are 'expert program'(health visiting program, dementia program) 'self-help program'(senior center supporting program, religious facilities supporting program) and 'health-promoting self-care program (self care program)'.