• 한국한의학연구원논문집
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• 제16권3호
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• pp.135-140
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• 2010

The usefulness of constitutional diagnoses based on skin measurements has been established in oriental medicine. According to Sasang constitutional medicine, humans can be distinguished based on properties of skin's friction, thickness and elasticity. To quantify and standardize skin diagnosis, the present study designed an equipment for measuring skin elasticity of hand. But there were some noises in measuring skin elasticity such as measurement method, environment, operator and conditions of patient. So we considered a six sigma project for reducing the measurement errors. The project was followed to discipline process of five macro phases: Define, Measure, Analyze, Improve and Control(DMAIC). So, we could find the major factors which should be controled for stabilizing measurement system and we revised the SOP(Standard Operating Procedure) of the skin elasticity measurement.

• 노동경제논집
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• 제34권3호
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• pp.1-28
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• 2011

이 논문은 노조기업의 노동수요탄력성이 비노조기업의 그것보다 작을 것이라는 이론적 예측을 실증적으로 검증한다. 이를 위해 기업정보 TS2000의 1990~2009년 기간의 기업체패널 자료를 이용하여 노동수요함수의 정태모형과 동태모형 그리고 노동비용 비증방정식을 추정한다. 추정결과는 첫째, 노조기업의 노동수요의 임금탄력성은 0.34~0.49로 비노조기업의 절반 수준이하로 나타났다. 둘째, 노조기업은 임금 및 산출 변화에 대한 고용조정에서 비노조기업보다 더 경직적인 것으로 나타났다. 셋째, 노동과 자본간 대체탄력성에 있어서는 노조기업과 비노조기업 간에 차이가 없는 것으로 나타났다.

• 콘크리트학회논문집
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• 제12권6호
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• pp.23-34
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• 2000

This paper reports the effects of curing temperature and aging on the strength and the modulus of elasticity. In oder to determine the strength and the modulus of elasticity with curing temperature and aging, experimental and analytical methods are adopted. The tests of 480 cylinders are carried out for type I, V and V with 15 percent replacement of fly ash cement concretes, which are cured at isothermal conditions of 10, 23, 35 and 5$0^{\circ}C$. and the concrete cylinders are tested at the ages of 1, 3, 7 and 28 days. According to the experimental results, the concrete subjected to high temperature at early ages attaines higher early-age compressive and splitting tensile strength but eventually attaines lower later-age compressive and splitting tensile strength. Even if modulus of elasticity has the same tendency, the variation of modulus of elasticity with curing temperature is smaller than that of compressive strength. Based on these experimental results, the relationships among compressive strength, modulus of elasticity and splitting tensile strength are proposed considering the effects of curing temperature, aging and cement type.

• 한국산림과학회지
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• 제98권2호
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• pp.148-155
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• 2009

The objective of this study is to know market structures of softwood logs being imported to South Korea from log producing countries. Import demand of softwood logs imported to South Korea from America, New Zealand and Chile is fixed as a function of log prices, the lagged dependent variable and output. On the basis of the adaptive expectations model, linear regression models that the explanatory variables included and the lagged dependent variable were estimated by Seemingly Unrelated Regression Equations (SURE). The short-run and long-run own price elasticity of America's softwood log import demand is -1.738 and -4.250 respectively. Then long-run elasticity is much higher than short-run elasticity. Short-run and long-run crosselasticity of New Zealand's softwood log import demand with respect to American's softwood log import price are inelastic at 0.505 and 0.883 respectively. Short-run and long-run cross-elasticity of Chile's softwood log import demands with respect to American's softwood log import prices were highly elastic at 2.442 and 4.462 respectively. Long-run elasticity was almost twice as high as short-run elasticity.

• Journal of the Korean Wood Science and Technology
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• 제42권2호
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• pp.130-137
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• 2014

Nondestructive evaluation (NDE) method by using a resonance frequency mode was carried out for ceramics made from particle boards with different phenol resin impregnation ratios (30, 40, 50, 60%) at carbonizing temperature of $800^{\circ}C$. The material for ceramics was Miscanthus sinensis var. purpurascens board. Dynamic modulus of elasticity increased with increasing impregnation ratio. There was a close relationship of dynamic modulus of elasticity and static bending modulus of elasticity to modulus of rupture (MOR). However, the result indicated that correlation coefficient is higher in dynamic modulus of elasticity to MOR than that in static modulus of elasticity to MOR. Therefore, the dynamic modulus of elasticity using resonance frequency by free vibration mode is more useful as a nondestructive evaluation method for predicting the MOR of ceramics made from Miscanthus sinensis var. purpurascens particle boards by different phenol resin impregnation ratios.

• 비파괴검사학회지
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• 제32권5호
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• pp.573-584
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• 2012

유방이나 전립선과 같은 연조직에서 발생하는 암이나 종양은 주위 조직보다 단단한 경향을 가진다. 하지만 초음파 B-mode 영상을 보면 암은 주위 조직과 거의 비슷하여 구별하기 어렵다. 따라서 조직의 단단한 정도를 영상화하면 더 정량적인 정보를 제공해 진단에 도움을 줄 수 있다. 초음파탄성영상은 측정하고자 하는 연조직에 기계적인 힘을 가하고 변형된 정도를 측정하여 영상화 한다. 탄성영상은 기존의 초음파 영상 진단기법과 더불어 종양을 진단하는 유용한 방법으로 자리매김하고 있다. 본 논문에서는 지금까지 발표된 다양한 탄성영상 방법을 분류하고 각 방법의 원리, 특성 등을 살펴본다.

• 보건행정학회지
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• 제17권3호
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• pp.50-67
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• 2007

This study investigated income elasticity of household health expenditures and differences by income level from 1998 through 2003. Data from Korean Labor and Income Panel Study was used for empirical analyses. To estimate the income effects on health expenditure, the two-part model was employed: a logistic regression for any health expenditure-first part-and a Ordinary Least Square regression for health expenditure conditional on any spending-second part. To estimate income elasticity, both health expenditure and income were log transformed in the second part. In addition, the random effects(RE) model was used for a longitudinal panel which was continuously followed from 1998 through 2003 to estimate income effects on health expenditures controlling for within and between unobservable household characteristics. Furthermore, difference in income effects on health expenditure across income level was investigated. Although income slightly increased odds of any health expenditure, there was not no table differences across income level. Income significantly increased health expenditures during study period(overall income elasticity: about 0.2) and the highest 20% income group presented higher income elasticity than the lowest 20% income group.

• 대한두개안면성형외과학회지
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• 제20권3호
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• pp.158-163
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• 2019

Background: Age-related changes in facial skin is a major concern in women. This study aimed to objectively evaluate normal skin elasticity and age-related differences in the faces of East Asian women. There are no standard values for data related to normal skin on East Asian women. Methods: We studied 129 healthy East Asian women without a history of cosmetic procedures or surgeries. Skin elasticity was assessed at the cheek and lower eyelid points, which were assessed on both the right and left sides of the face. Results: The age of the subjects showed significant negative correlations with the R2 and R7 parameters, which represent skin elasticity after deformation. Conclusion: We therefore concluded that the primary decrease in skin elasticity in East Asian women occurs in the midface region.

• 대한물리의학회지
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• 제18권4호
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• pp.77-87
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• 2023

PURPOSE: The purpose of this study was to investigate the changes in the flexibility and elasticity of the muscles when the hamstrings were stretched in one direction and when they were stretched in three directions. METHODS: In this study the subjects were divided into two groups, namely the 'one-direction stretching exercise of the hamstring muscle in the neutral position' group (female: 14 people, male: 14 people) and the 'three-way stretching exercise' group (female: 12 people, male: 14 people) considering the positions of the three hamstring muscles. The elasticity and flexibility of the hamstring muscles were measured before and after the self-extension exercise, and the average value of two measurements was noted. To evaluate the flexibility of the hamstring muscle, a 'sit and reach' test was performed, and muscle elasticity was measured using the MyotonPRO® device. RESULTS: After the stretching exercise, flexibility increased in both groups. In terms of muscle elasticity, the body dynamic strength and resonance frequency of the stretching one-direction stretching group decreased after the stretching exercise. CONCLUSION: To alter the muscle characteristics and increase the flexibility when performing a stretching exercise, selecting and stretching only one muscle with the lowest range of motion yields effective results. The ideal technique to be employed appears to be to stretch the entire hamstring muscle in one direction from the neutral position.

• 디지털융복합연구
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• 제12권5호
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• pp.335-343
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• 2014

본 연구에서는 치위생과 학생들의 자아탄력성을 알아보고, 자아탄력성이 학업만족과 대학생활 적응에 미치는 영향을 파악하여, 자아탄력성 향상과 학업만족, 대학생활 적응을 향상시키기 위한 방안을 제시하고자 하였다. 대구 경북지역의 2개 대학교 치위생과 1, 2, 3학년 학생 369명을 대상으로 2013년 10월 1일부터 10월 31일까지 편의표본추출법에 의해 설문 조사하였다. 요인분석결과, 자아탄력성은 대인관계 효율성, 낙관적 태도, 감정통제, 자신감으로 구분되었고, 학업만족은 교과만족, 관계만족, 인식만족으로 구분되었으며, 자아탄력성이 높을수록 학업만족은 높았고, 자아탄력성과 학업만족이 높을수록 대학생활 적응은 높았다(p<0.001). 이에 대학생활 적응을 보다 증진할 수 있도록 대인관계 개선과 목표설정, 분노조절, 동기부여 등의 자아탄력성 조절능력 강화를 위한 지속적인 관심과 노력이 무엇보다 중요하다 할 수 있으며, 이와 관련한 학년과 학제에 맞는 지속적이고, 단계적인 교육 프로그램 개발을 비롯한 운영과 환경조성이 필요하다.