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.

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

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.

영어의 구 강세와 리듬교체에 관한 연구

김지숙,양선기 순천대학교 어학연구소 1997 어학연구 Vol.8 No.-

Metrical theory is mainly concerned with the study of stress and rhythm. The regular repetition of English stressed syllables should be simplified by a rhythm rule. This paper aims to systematize English phrase stress and rhythm through some generalized rules, comparing metrical theory with optimality theory. In this paper, three metrical theories will be introduced to explain why such rhythmic alternation occurs. Relating to this, the bracketed-grid theory proposed by Hayes (1995) gives us the most appropriate explanation with the faithfulness condition and the continuous column constraint which are based on the principle of head-modifier projection. And then we will examine the alternation of English phrase stress applying the movement of English phrase stress to optimality theory.

자질유인이론적 접근에 따른 양화사 인상

김지숙,양선기 순천대학교 어학연구소 1999 어학연구 Vol.10 No.-

This paper aims to examine how to account for the difference between ambiguity and unambiguity of the scope shown in the quantifier structure. To distinguish ambiguity from unambiguity of scope by raising quantifier, we examine the data presented in Aoun & Li (1989), Aoun & Li (1993), and Pica & synder 91994). Finally, we will try to capture scope analysis by the quantifier raising in English under the Attract-F, minimalist framework. The paper is organized as follows. Section Ⅱ discusses the so - called quantifier raising as α-movement. In section Ⅲ we examine Aoun & Li's(1993) approach to the quantifier raising under economy principle. In section Ⅳ we treat the quantifier raising in terms of the Chain and Case assignment. The tentative results emerging from the minimalist framework, Attract-F theory on the quantifier raising are summarized in section Ⅴ and Ⅵ.

핵전달 방법에 의한 Aspergillus 속 종간잡종 형성에 관하여

김선우,이숙영,양영기 조선대학교 기초과학연구소 1990 自然科學硏究 Vol.13 No.1

핵전달 방법에 의해 A. nidulans FGSC 514와 A. niger의 종간잡종을 얻었고 그들 특성을 관찰한 결과는 다음과 같다. 1. A. nidulans FGSC 514의 원형질체 형성은 삼투안정제인 0.6M KCI과 0.5% Novozym 234를 2시간 처리하여 2x10^7 원형질체를 얻었다. 2. A. niger의 원형질체 형성은 삼투안정제로 0.6M KCI, 0.5% Novozym 234, 0.3% β-glucuronidase와 0.4% BSA를 2시간 처리하여 6x10^7 원형질체를 얻었다. 3. A. niger의핵을 추출하여 A. nidulans FGSC 514 원형질체를 형질전환시켜 3.5%의 형질전환률을 얻었다. 4. 형질전환체의 섬유소 분해효소 활성은 CMCase, avicelase와 pectinase에서 대체적으로 증가하였고 β-glucosidase에서는 모균주보다 약간 감소하는 경향을 보였다. 5. 형질전환체의 건조균체량은 모균주에 비해 대체적으로 높게 나타났고 배양 10시간부터 25시간까지 급격한 증가를 보였으나 40시간 후에는 거의 증가하지 않았다. 6. 형질전환체의 DNA 함량은 1.5∼2.23㎍/10^7pts로 모균주에 비해 약 1.4∼2.0배 증가하였다. 7. 세포외 수용성 단백질은 전기영동 양상은 형질전환체들은 유사하나 모균주의 A. nidulans FGSC 514와 A. niger과는 양상이 다른 중간형태를 나타내었다. The properties of interspecific hybrids obtained by nuclear transfer method between A. nidulans FGSC 514 and A. niger wild type were analyzed by enzyme activity, protein determination, dry weight, DNA content, and total solube protein. The protoplast formation from A. niger was 6x10^7 pts with the treatment of 0.6M KCI, osmotic stabilizer, 0.5% novozym 234, 0.3% β-glucuronidase and 0.4% BSA for 2 hrs. When the isolated nuclei of A. niger wild type were transformed the protoplasts of A. nidulans FGSC 514, transformation frequency was 3.5%. It was found that the enzyme activities in degradation of cellulose and polysaccharide were increased in CMCase, avicelas and pectinase but decreased in β-glucosidase. The strains in which enzyme acttivity in general had a tendency of increasing apecific activity and protein content. The dry weight of transformants were increased more than the parent and increased fast from 10 to 25 hrs. The DNA content of transformants were 1.5∼2.23㎍ and 1.42∼2.04 times more than that of both A. nidulans FGSC 514 and A. niger wild type. Electrophoretic patterns of extracellular solube protein were different between parental and transformant strains.

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.

유산소 리듬 운동프로그램이 노인의 혈압, 심박수 및 생활만족도에 미치는 효과

우선혜,김효정,박영숙 대한보건협회 2001 대한보건연구 Vol.27 No.3

The purpose of this study was to test the effects of aerobic rhythmical exercise program on blood pressure, pulse and the life satisfaction of the elderly. This quai-experimental study was designed as a non-equivalent control group pretest-posttest study. The subjects were 36 subjects(experimental group: 19 subjects, control group: 17 subjects), aged between 65 and 73 years who have normal cognition, sensory function and cerebellum function. Aerobic rhythmical exercise program was developed on the basis of aerobic exercise, Korean tradititional dance and music by the author. The blood pressure, pulse rate and life satisfaction were measured prior to and following the experimental treatment. Data were analyzed with x^2-test, t-test, mean, standard deviation, percentage of change and ANCOVA test using SAS program. The results were as follows. 1. There was no significant difference of systolic blood pressure between experimental and control group following the aerobic rhythmical exercise program(F=1.39, P=0.247). 2. The diastolic blood pressure of the experimental group was significantly lower than that of control group following the aerobic rhythmical exercise program(F=2.96, p<0.1). 3. There was no significant difference of resting heart rate between experimental and control group following the aerobic rhythmical exercise program(F=0.07, P=0.793). 4. The life satisfaction of the experimental group was significantly higher than that of control group following the aerobic rhythmical exercise program(F=9.94, p<0.01). On the basis of the above findings, aerobic rhythmical exercise program is effective in reducing diastolic blood pressure and promoting life satisfaction of the elderly. Thus, this program can be recommended as an effective nursing intervention for the elderly.

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.

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.