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.

진주지역 아동 복지 시설에서의 피복환경에 대한 미생물 평가

정정숙,박선자,정덕화 대한보건협회 2002 대한보건연구 Vol.28 No.4

This study was conducted to assess the microbial level of cloth environment at five child welfare institutions(A, B, C, D, E) in Jinju District. Four major categories for experiment were personal hygiene, cloth hygiene of chilfren, cloth environment in indoor and kitchen which were involved thirteen minor items. Main assessment tool on this research was total bacteria count. Whereas total bacteria count at B child welfare institution was high as 1.96× 10^4CFU /100cm^2 in hands, hair hygiene was good at the same place. According to cloth hygiene of children, hygienic condition of E place was bad with a high level of bacteria counts from various items including socks, shoes. Total bacteria of indoor cloth environmemt at all child welfare institutions was beyond the standatd level, but indoor air was more clean than other items. In cloth environment of kitchen, dish cloth and apron of C place showed high level of total bacteria counts with 1.72×10^3 CFU/100cm^2 and TNTC, respectively. fungi were also screened from every items except hair, and detected as high frequency in socks of A, B, C and E places. Among them, B place was oftenly contaminated with fungi in various items such as socks, bedcloth, apron and rubber gloves. In conclusion, periodic surveillance on microbial assessment of cloth environment should be necessary for the safety of cloth environment at child welfare institutions, so more hygienic practice and education of staff members were also reinforced.

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.

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.

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.

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.

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

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.