• Macromolecular Research
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• 제16권4호
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• pp.320-328
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• 2008

We established a thermodynamic framework of group contribution method based on modified double lattice (MDL) model. The proposed model included the long-range interaction contribution caused by the Coulomb electrostatic forces, the middle-range interaction contribution from the indirect effects of the charge interactions and the short-range interaction from modified double lattice model. The group contribution method explained the combinatorial energy contribution responsible for the revised Flory-Huggins entropy of mixing, the van der Waals energy contribution from dispersion, the polar force, and the specific energy contribution from hydrogen bonding. We showed the solvent activities of various polymer solution systems in comparison with theoretical predictions based on experimental data. The proposed model gave a very good agreement with the experimental data.

• 대한물리의학회지
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• 제8권2호
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• pp.153-161
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• 2013

PURPOSE: This study aimed to investigate the effect of complex theraputic exercise on visual analog scale of pain, shoulder' range of motion for middle-aged women with breast cancer related lymphedema. METHODS: The 14 middle-aged women involved voluntary in this study and then they were divided into two groups(n =7 per group). The complex exercise program was implemented over 4 weeks, 60 minutes per day, with 3 types of exercise for stimulation whereas the control group was performed a classical decongestive physiotherapy in a same day. For data analysis, the mean and standard deviation were estimated; 2 way repeated measures ANOVA was carried out. RESULTS: First, The level of VAS was significantly reduced on time, interaction effect in the group. Second, most factors of ROM were significantly increased on time, interaction effect whereas extension was not significantly increased. CONCLUSION: In conclusion, Our results showed that complex therapeutic exercise could improve or maintain VAS and ROM of shoulder joint for middle-aged women with breast cancer related lymphedema.

• 여성건강간호학회지
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• 제26권2호
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• pp.120-130
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• 2020

This study aimed to evaluate Cox's interaction model of client health behavior (IMCHB) as used in studies on women's health. Using keyword combinations of "women" and "IMCHB" or "interaction model of client health behavior," we searched the PubMed, MEDLINE, Embase, and RISS databases for studies on the promotion of women's health published from January 2009 to April 2019. Finally, 11 studies were selected and evaluated according to seven criteria for theory evaluation, which combined Fawcett's theory evaluation criteria and Chinn and Kramer's criteria. We found that the IMCHB corresponds to a verifiable practical level of a middle-range theory, although it may be partially abstract. It contains all four concepts of the metaparadigm of nursing, in terms of a holistic philosophical approach. A theoretical evaluation demonstrated that the IMCHB has significance, generality, testability, empirical adequacy, and pragmatic adequacy for nursing practice and research. However, the lack of clear conceptual definitions and the presence of complex relationships among concepts resulted in a lack of internal consistency and parsimony. According to an in-depth verification through a review of the literature, the IMCHB has been used as a health promotion intervention strategy for various populations of women and has led to useful results in nursing practice. The IMCHB was confirmed to be a suitable theory for experimental and clinical research. Future research can build on this middle-range theory for women's health research and practice.

• 대한인간공학회지
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• 제9권1호
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• pp.35-42
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• 1990

This study is concerned with the accuracy, of error with which subjects can interpolate the location of a target between two graduation markers with 4 orientations and 6 sizes CRT display. Stimuli were graphic images on CRT with a linear, end-markec, ungraduated scales having a target. The location of a target is estimated in units over te range 1-99. Smallest error of estimates was at the near ends and middle of the base-line. The median error was less than 2 units, modal error was 1, and the most error (; 99.7%) was within 10. A proper size to make an minimum error in interpolation exists such that size 400 pixels. Interpolation estimation is shown to be affected by the size, location and interaction (orientation x location, size x location). The accuracy, interpolation performance are discussed in relation to absolute error associated with visual performance.

• Wind and Structures
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• 제30권5호
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• pp.475-483
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• 2020

This work investigates Reynolds number Re (= 50 - 200) effects on the flows around a single cylinder and the two tandem (center-to-center spacing L^⁎= L/D = 4) cylinders, each of a diameter D. Vorticity structures, Strouhal numbers, and time-mean and fluctuating forces are presented and discussed. For the single cylinder, with increasing Re in the range examined, the vorticity magnitude, Strouhal number and fluctuating lift all monotonically rise but time-mean drag, vortex formation length, and lateral distance between the two rows of vortices all shrink. For the two tandem cylinders, the increase in Re leads to the formation of three distinct flows, namely reattachment flow (50 ≤ Re ≤ 75), transition flow (75 < Re < 100), and coshedding flow (100 ≤ Re ≤ 200). The reattachment flow at Re = 50 is steady. When Re is increased from 75 to 200, the Strouhal number of the two cylinders, jumping from 0.113 to 0.15 in the transition flow regime, swells to 0.188. The two-cylinder flow is more sensitive to Re than the single cylinder flow. Fluctuating lift is greater for the downstream cylinder than the upstream cylinder while time-mean drag is higher for the upstream cylinder than for the other. The time-mean drags of the upstream cylinder and single cylinder behaves similar to each other, both declining with increasing Re.

• 대한간호학회지
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• 제34권8호
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• pp.1402-1408
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• 2004

Purpose: The purpose of this study was to analyze the concept of self-care in elders with dementia through a review of nursing literature and to provide more understanding of the definition and perspectives of the concept of self-care notion in elders with dementia. Methods: The technique developed by Walker and Avant was used as a guide in analyzing the concept of self-care. Results: Attributes of self-care in dementia may include a single or group of actions needed for sustaining life, a personal effort to maintain functional independence while minimizing other's assistance, an outcome behavior from the person's interaction with inter-personal and/or contextual environment, and a functional ability that may decline in parallel to cognitive impairment. Antecedents of self-care in dementia may include at least presence of a certain degree of cognitive appraisal for the self-care needs, self-willingness for the self-care action, spatial and visual orientation, cultural pre-conception of the self-care behavior, presence of environmental context/equipment available for self-care, and sufficient time available. The consequences may include sustaining of life, feel of satisfaction, achieving independence, extended life expectancy, increased self-confidence, decreased caregiver distress and/or burden, savings in health care costs. Discussion: Defining attributes and antecedents and consequences of self-care in dementia identified in this study provided empirical ground of a middle-range theory of self-care for a clinical population with dementia and generated possible hypotheses to be tested in future studies.

• 한국주거학회논문집
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• 제28권1호
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• pp.73-82
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• 2017

The goal of this study is to identify the sense of community that is present in people based on different housing types and to devise methods for a sustainable community by comparing and contrasting the factors affecting the sense of community between apartment residents and non-apartment residents. The data for the analysis was collected using the questionnaire survey method from July 23~30, 2015, and the sample consisted of 225 respondents living in Gongdukdong, Mapo-gu, in Seoul. The results were as follows: (1) The attitude and sense of community in both groups turned out to be near the middle range without showing a significant difference. (2) All the variables related to the attitude towards the community that have impacts on the development of sense of community show significant positive correlations in both groups. (3) Determining factors of the sense of community are -in the order of importance- frequency of interaction, community awareness, and satisfaction level of community facilities. This result indicates that developing customized programs to enhance community interactions and making people aware of policies and support available are more effective in building a strong sense of community than expanding and refurbishing community facilities.

• 한국가정과교육학회지
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• 제35권2호
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• pp.73-89
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• 2023

본 연구의 목적은 한국과 일본의 현행 중학교 가정교과서 '소비생활과 자원관리' 관련 단원을 지속가능발전교육(ESD) 구성개념(다양성, 상호성, 유한성, 공평성, 연계성, 책임성)을 기준으로 분석하여 두 나라 중학교 가정교과서에 ESD 구성개념이 어떻게 반영되었는지 비교 분석하는 데 있다. 분석대상은 한국과 일본 각 세 개 출판사에서 발간된 가정교과서(총 6개 출판사)의 '소비생활과 자원관리' 분야의 교육내용으로, 한국 교육과정 내용요소 '청소년기의 소비생활', '청소년의 자기 관리', 일본 교육과정 내용요소 '금전의 관리와 구입', '소비자의 권리와 책임'과 관련된 단원이 이에 해당된다. 현행 중학교 가정교과서 '소비생활과 자원관리' 관련 단원에 ESD 구성개념이 얼마나 반영되었는지 분석한 결과, 한국의 경우, 책임성(23.36%)이 제일 많이 반영되었으며, 상호성(22.43%), 연계성(19.63%), 공평성(18.69%), 유한성(10.28%), 다양성(5.61%) 순으로 반영되었다. 반면, 일본의 경우, 연계성(21.74%)과 상호성(21.45%)이 많이 반영되었으며, 공평성(16.23%), 책임성(13.91%), 유한성(13.33%), 다양성(13.33%) 순으로 반영되었다. 한국의 경우 ESD 구성개념별로 반영된 비율이 서로 차이가 많이 난 반면, 일본의 경우 연계성과 상호성 외에 다른 ESD 구성개념이 대체로 골고루 반영되었다. 한국의 교과서에서는 합리적이고 윤리적인 소비생활을 실천하는 면에서 책임성을 많이 강조하였다. 일본의 교과서에서는 소비자단체를 통한 소비자 문제 해결 및 지원, 환경 문제 해결을 위한 지역사회 및 국제사회의 협력 등을 다룬 점에서 연계성을 많이 강조하였고, 개인과 가족의 소비 행동이 사회, 경제, 환경에 미치는 영향을 다룬 점에서 상호성을 많이 강조하였다. 결론적으로, 한국과 일본 가정교과서에 지속가능성을 실현하는 소비자를 키우기 위한 요소들이 반영되었다는 것을 확인할 수 있었다.

• Earthquakes and Structures
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• 제26권3호
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• pp.239-249
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• 2024

A new layered shear continuum model box was developed to address the dynamic response issues of buried oil and gas pipelines under multi-point excitation. Vibration table tests were conducted to investigate the seismic response of buried pipelines and the surrounding soil under longitudinal multi-point excitation. A nonlinear model of the pipeline-soil interaction was established using ABAQUS finite element software for simulation and analysis. The seismic response characteristics of the pipeline and soil under longitudinal multi-point excitation were clarified through vibration table tests and simulation. The results showed good consistency between the simulation and tests. The acceleration of the soil and pipeline exhibited amplification effects at loading levels of 0.1 g and 0.2 g, which significantly reduced at loading levels of 0.4 g and 0.62 g. The peak acceleration increased with increasing loading levels, and the peak frequency was in the low-frequency range of 0 Hz to 10 Hz. The amplitude in the frequency range of 10 Hz to 50 Hz showed a significant decreasing trend. The displacement peak curve of the soil increased with the loading level, and the nonlinearity of the soil resulted in a slower growth rate of displacement. The strain curve of the pipeline exhibited a parabolic shape, with the strain in the middle of the pipeline about 3 to 3.5 times larger than that on both sides. This study provides an effective theoretical basis and test basis for improving the seismic resistance of buried oil and gas pipelines.

• 가정과삶의질연구
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• 제23권5호
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• pp.103-122
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• 2005

The purpose of this study was to examine the influences of their money attitudes to spending behaviors of middle, high, and college students. The total number of students selected for this study were 1,252. Factor analysis, Cronbach' ${\alpha}$, two-way ANOVA, Duncan' multiple range test, Pearson correlation analysis, and multiple regression were used for statistical analysis. The results were summarized as followings: 1) The tendency of attitude that money is good was highest. Also, the tendency of attitude that money represents freedom and power was slightly high. On the other hand the attitudes that money represents achievement, and that money is evil were low. Especially the attitude that money represents respect was lowest. 2) Resulting from two-way ANOVA, the attitudes that money is good and represents achievement showed significant interaction effects between sex and age. The altitude that money is good showed significant differences by sex especially among middle and high school students. The altitude that money represents achievement showed significant differences by age among the male students. Three types of attitudes that money is evil, money represents respect, and money represents both freedom and power showed significant main effects in different age groups. Also the attitude that money represents freedom and power showed significant main effect by different sexes. 3) Four different types of measuring spending behaviors scored slightly low mark. 4) Resulting from two-way ANOVA, four different spending behaviors showed significant difference only by sexes and ages. Planned spalding behavior and conscious spending behavior showed significant differences in ages and sexes separately. While impulsive spending behavior by different age groups resulted in significant differences. Excessive spending behavior by sexes resulted in significant differences. 5) Regression analysis showed that planned spending behavior had the linear relationships in no, sex, self-esteem, and attitude that money is good. Conscious spending behavior had the linear relationships in ses, and attitudes that money represent achievement. respect, and freedom. Impulsive spending behavior had the linear relationships in age, self-esteem, and attitudes that money is good and that money is evil, and attitude that money represent freedom, Excessive spending behavior had the linear relationships in sex, self-esteem, and attitudes that money represent achievement, respect and freedom.