• 한국정보통신학회논문지
• /
• 제14권12호
• /
• pp.2747-2754
• /
• 2010

부항요법은 다양한 질환에 치료목적으로 널리 사용되어 왔다. 그러나 부항에 대한 경락과 경혈의 상태 변화에 관한 연구가 전무한 상태이다. 본 연구에서는 부항자극에 대한 경락경혈의 상태변화를 분석하여 인체 전체에 미치는 파급효과를 확인하고자하였다. 이에 일정 음압(30kPa)으로 자극 가능한 시스템을 개발하였으며, 좌측 수태음폐경(LU)의 협백(LU4)과 척택(LU5)의 경락선상 중간지점을 자극하였다. 좌/우 수태음폐경의 경혈 및 비경혈에서 수분, 탄성도를 측정하였으며 상완이두박근에서 EMG 신호를 자극 전/후 측정하여 부항 요법이 인체에 미치는 영향을 관찰하였다. 그 결과, 자극 전/후 수분의 변화는 12.49%로 미비하였으며, 탄성도는 64.42%로 높은 변화를 확인하였다. 또한, 경혈이 비경혈 보다 탄성도 변화가 많았으며, 좌측보다 우측에서의 탄성도 변화가 많이 관찰되었다. 좌/우 EMG 신호의 RMS와 Median Power가 유의하게 낮아졌으나 Median frequency에서는 유의성을 확인할 수 없었다. 따라서, 음압자극은 경락경혈의 탄성도 및 근전도 변화를 유도함으로써 인체 전체에 파급적 효과를 줄 수 있음을 확인하였다.

• Journal of the Korean Wood Science and Technology
• /
• 제48권5호
• /
• pp.696-709
• /
• 2020

쌀의 도정과정에서 발생되는 농업부산물인 왕겨를 탄화시켜 만든 왕겨숯과 톱밥을 이용하여 수지 첨가율, 톱밥 첨가율별로 보드를 제조하고 수지와 톱밥 첨가율이 동적·정적탄성계수 및 휨강도에 미치는 영향과 동적탄성계수와 정적탄성계수 및 휨강도 사이의 관계를 조사하였다. 왕겨숯-톱밥 혼합보드의 페놀수지 첨가율이 10~25%로 증가할수록 휨성능이 증가하여 수지 첨가율이 휨성능에 크게 영향을 주었다. 톱밥 첨가율이 증가할수록 휨성능도 완만하게 증가하였지만, 톱밥첨가율과 휨강도, 동적 및 정적 휨 탄성계수 사이는 결정계수의 값(R²)은 0.4012, 0.0809, 0.1971로써 다소 낮은 상관관계를 나타내 톱밥 첨가율이 휨성능에 미치는 영향이 미비하였다. 왕겨숯-톱밥 혼합보드의 동적탄성계수와 정적탄성계수 및 휨강도 사이에 높은 상관관계가 확인되어 동적탄성계수로부터 비파괴적으로 정적탄성계수와 휨강도의 예측이 가능한 것으로 확인되었다.

• International journal of advanced smart convergence
• /
• 제8권1호
• /
• pp.113-125
• /
• 2019

The radish skin and radish greens are an edible part of the radish. But they are removed before eating the radish and used as a byproduct or an animal feed material because of their tough and rough texture. This study was conducted to investigate the effect of supercritical heat-treated radish-extract on UV-induced HRM-2 wrinkled mouse animal model on anti-aging wrinkles. Supercritical heat-treated radish-extract was applied on the back of seven-weeks old HRM-2 mice. The effect of HRE on skin thickness, elasticity and wrinkle formation of the mice was observed by using UVB lamp to induce melanogenesis and wrinkle formation. As the result, increased depth of wrinkles was observed in the negative control group in comparison to the normal group. In contrast, decreased depth of wrinkles was observed in the radish-extract-free group compared to the negative control group. In the study of the effect of radish-extract on wrinkle-formation related gene expression and protein what protein expression, MMP-2 and MMP-9 gene expression significantly increased in the negative control group compared to the normal group. The gene expression reduced in dependence to the mass of radish-extract treated. Similar to quantitative results of mRNA expression, the expression of MMP-2 protein increased as a result of UVB-irradiation. The MMP-2 expression was inhibited in dependence to the mass of radish-extract treated. In conclusion, the supercritical heat-treated radish-extract has an effect on improving skin wrinkles not only when it is applied to the skin but also when orally ingested. Thus, it can be effectively used as a composition to health functional products. Therefore we can also conclude that radish a food that does not show any side-effects even upon long-term intake can reduce wrinkle formation as well as improve skin elasticity when taken regularly for a long period.

• 대한의용생체공학회:의공학회지
• /
• 제34권4호
• /
• pp.170-176
• /
• 2013

Lymphedema is a phenomenon in which fluid is accumulated inside tissues due to the damaged lymphatic systems. Lymphedema can cause complications such as lymphangitis, infection, changes in skin texture, fibrosis, and lymphangiosarcoma. In this study, a lymphedema screening system based on the elasticity of the skin is proposed to easily quantify lymphedema. The developed probe consists of touch sensors, a load cell and hall-effect sensors to measure the indentation force on the skin and the return time of the skin. The developed system can be used to estimate the change in the elasticity of the skin to quantify lymphedema. The system was tested with a thyroid phantom and gelatin phantoms of different concentrations and the resulting force and the time were recorded. It was found that the increase in the elasticity leads to a higher indentation force and shorter return time. This shows that the developed system can monitor the change in the skin elasticity by measuring the return time and the indentation force. The feasibility of the system in clinical applications will be evaluated in the future study.

• 대한화장품학회지
• /
• 제46권3호
• /
• pp.243-252
• /
• 2020

본 연구에서는 Fervidobacterium islandicum AW-1를 이용하여 극성 저분자 케라틴 펩타이드를 생산하고, 피부 탄력과 관련한 인자를 확인하여, 화장품 원료로서 극성 저분자 케라틴 펩타이드의 가능성을 확인하였다. 인체섬유아세포에 극성 저분자 케라틴 펩타이드를 농도에 따라 세포독성 및 콜라겐 합성능을 확인한 결과, 세포 독성은 나타나지 않았고, 인체섬유아세포 내 콜라겐 합성을 증가시키는 것을 확인하였다. 극성 저분자 케라틴 펩타이드를 함유한 마스크팩을 만들어, 22 명의 건강한 성인 피험자를 대상으로 4 주 동안 시험제품을 사용한 결과, 피부 탄력 및 피부 비틀림 탄력 개선, 수분량 증가, 피부색 개선에서 통계적으로 유의한 효과를 나타냈다. 이를 통해 극성 저분자 케라틴 펩타이드는 피부 탄력 개선에 도움을 주는 화장품 원료로 사용할 수 있음을 확인하였다.

• Journal of Nutrition and Health
• /
• 제43권3호
• /
• pp.233-245
• /
• 2010

The purpose of this study was to investigate the effects of dietary habits and nutrient intakes on skin condition of female university students. The subjects were 95 female university students in Daegu. This study examined anthropometric measurements, dietary intake, food intake habits and skin condition (moisture, elasticity, sebum (U-zone, T-zone), pores, evenness and melanin pigmentation. The subjects in this study had an average age of 21.4, an average height and weight of 161.2 cm and 52.9 kg, respectively, and the average body mass index (BMI) was 20.3 $kg/m^2$. The means of skin elasticity, pores, evenness, and melanin pigmentation were within the normal range of women in their 20s and the skin moisture state was slightly lower than the normal range, which showed a dry tendency. The sebum in the U-zone and the T-zone was lower than the standard values, which showed less secretion in both areas. The subjects with high nut intake showed a better skin pore state (p < 0.05). Those with a high intake of instant foods showed a sig-nificantly low skin moisture and a significantly higher sebum rate (p < 0.05). The group with high skin elasticity and the group with less melanin pigmentation showed a significantly low animal protein intake (p < 0.05). The group with high skin elasticity also showed a significantly higher vitamin A and niacin intakes as well (p < 0.05). The group with high skin evenness showed a significantly lower animal lipid intake and a significantly higher vitamin E intake (p < 0.05). In addition, those with high skin elasticity and evenness as well as low melanin pigmentation showed a tendency of high intake of antioxidant vitamins, such as vitamin A, carotene, vitamin C or vitamin E. In summary, a moderate intake of plant-based products and also the antioxidant vitamins within such products seems to have a beneficial effect on maintaining a healthy and good skin condition.

• 한방안이비인후피부과학회지
• /
• 제25권3호
• /
• pp.150-159
• /
• 2012

Objective : The purpose of this study was to evaluate the effect of korean herbal cosmetics for facial skin elasticity. Methods : We recruited patients and divided them to cosmetics group and control group randomly. We provided korean herbal cosmetics to cosmetics group and subjects in cosmetics group applied the provided cosmetics for 4 weeks. Control group waited and applied cosmetics that had previously used for 4 weeks. We assessed all subjects in 0 week, 2 weeks and 4 weeks. Primary assessment instrument was moire topography photo scale. Second assessment instrument was skin moisture, oiliness and elasticity which assessed with skintouch system v1.0, detox/regeneration questionnaire score and self-evaluating facial wrinkle/looseness score. Result : Moire topography photo scale improved in cosmetics group than control group significantly. Skin moisture and elasticity assessed with skintouch system improved in cosmetics group than control group significantly while skin oiliness assessed with skintouch system have not improved significantly. Detox/regeneration questionnaire score and self-evaluating facial wrinkle/looseness score improved in cosmetics group than control group significantly. Conclusion : Korean herbal cosmetics application might be effective method for facial skin elasticity.

• 콘크리트학회논문집
• /
• 제14권1호
• /
• pp.67-75
• /
• 2002

콘크리트 구조물의 설계 덴 해석에 있어서나 구조물 처짐 제어에 있어서 가장 중요한 재료적 변수는 탄성계수이다. 일반적으로 탄성계수는 실용적 측면에서 측정이 용이한 단위중량과 압축강도만의 함수로써 간략하게 정의되고 있다. 그러나 이러한 회귀식들은 대부분 실험자료에 대한 평균적인 의미이므로 매우 많은 불확실성이 포함되어 있어 지금까지 제시된 많은 규준식 및 실험식들이 다소의 차이가 있다. Fig. 1에서와 같이 이러한 식들은 압축강도와 탄성계수사이의 큰 상관성이 있음을 잘 나타내고 있으나, 동일한 압축강도에서 탄성계수는 크게 분산된 값으로 측정됨을 알 수 있다. 본 연구에서는 고강도 콘크리트 영역에서 탄성계수에 미치는 배합변수들의 영향을 통계적 기법을 이용하여 분석하고 이를 통하여 동일한 압축강도에서 최대의 탄성계수를 얼기 위한 방안을 구명하였다.

• 한국산학기술학회논문지
• /
• 제12권12호
• /
• pp.5805-5810
• /
• 2011

본 연구는 피부 관리 측면의 노화방지 프로그램을 개발하는 기초자료를 제공할 목적으로 수기 요법과 저출력 레이저 요법을 이용하여 각각의 요법에 8명씩의 41세에서 58세 사이의 여성들에게 2011년 6월 20일부터 8월 26일까지 주 2회씩 4주 동안 총 8회에 걸쳐 안면 마사지를 시행하였다. 시행 2, 4, 6, 8회후 눈 밑과 볼의 피부 탄력도와 눈가와 볼의 멜라닌 양을 측정하여 평균값과 표준편차를 내고 비교 분석한 결과 두 집단 모두에서 탄력도가 유의적으로 증가하고 멜라닌양은 유의적으로 감소하는 결과가 나타났다. 또한, 탄력도의 증가율과 멜라닌양의 감소율 모두에서 수기 요법보다 저출력 레이저 요법이 더 효과가 높은 것으로 나타나 저출력 레이저 요법이 안면 피부의 탄력도와 멜라닌 양에 미치는 효과가 수기 요법보다 높은 것으로 분석되었다. 따라서 저출력 레이저를 이용한 피부 관리는 안면 피부의 노화방지에 유의하며 새로운 피부 관리의 프로그램으로 활용할 수 있을 것으로 분석되었다.

• 농업과학연구
• /
• 제49권4호
• /
• pp.949-961
• /
• 2022

The purpose of this study is to build an oyster outlook model. In particular, by limiting oyster items, it was designed as a partial equilibrium model based on a panel analysis of a fixed effect model on aquaculture facilities. The model was built with a dynamic ecological equation (DEEM) system that considers aquaculture and harvesting processes. As a result of the estimation of the initial aquaculture facilities based on the panel analysis, the elasticity of the remaining facility volume in the previous month was estimated to be 0.63. According to Nerlove's model, the adjustment coefficient was interpreted as 0.31 and the adjustment speed was analyzed to be very slow. Also, the relative income coefficient was estimated to be 2.41. In terms of elasticity, it was estimated as 0.08% in Gyeongnam, 0.32% in Jeonnam, and 1.98% in other regions. It was analyzed that the elasticity of relative income was accordingly higher in non-main production area. In case of the estimation of the monthly harvest facility volume, the elasticity of the remaining facility volume in the previous month was estimated as 0.53, and the elasticity of the farm-gate price was estimated as 0.23. Both fresh and chilled and frozen oysters' exports were estimated to be sensitive to fluctuations in domestic prices and exchange rates, while Japanese wholesale prices were estimated to be relatively low in sensitivity, especially to the exchange rate with Japan. In estimating the farm-gate price, the price elasticity coefficient of monthly production was estimated to be inelastic at 0.25.