• 한국산학기술학회논문지
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• 제20권7호
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• pp.102-110
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• 2019

본 연구는 건강보험공단의 기준에 의해 부분도움 또는 완전도움이 필요한 등급을 받은 정신적, 신체적 기능장애를 가진 노인을 대상으로, 고무의 탄성을 이용하여 관절과 근육이 무리를 덜 주는 저항성 운동프로그램들 개발하고, 이 운동이 노인의 보행능력, 균형능력 및 근력 향상에 미치는 효과를 분석한 연구이다. 경기, 충청권의 주간보호센터 세 곳을 대상으로 노인들 58명에게 12주간의 운동 프로그램을 진행한 후, 운동 참여 전과 후의 수치에 대해 종속 t-검증을 실시하였다. 그 결과 전체 참여자들이 보행능력, 균형능력, 근력에서 평균적인 향상을 보였다. 특히 모든 등급에서 검증된 균형능력의 유의한 향상(p<.01)은 균형능력이 일상생활 능력을 향상시키고 낙상 위험을 감소시킨다는 측면에서 노인 삶의 질 향상의 의미가 크다고 할 수 있다. 따라서 본 운동프로그램을 전체 노인으로 대상을 확대하고 활성화시킨다면, 건강한 노인이 치료가 필요한 취약계층으로 이동하는 것을 방지하고 허약노인이 장애노인으로 진행되는 것을 지연시킬 수 있어 개인적, 국가적 손실을 최소화할 수 있는 예방적 방법 중 하나가 될 것으로 기대된다.

• 한국운동역학회지
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• 제25권2호
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• pp.175-182
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• 2015

Objective : The purpose of this study was to investigate difference in fascicle behavior of the medial gastrocnemius during the locomotion with varying intensities, such as gait and one-legged and two-legged vertical jumping. Methods : Six subjects (3 males and 3 females; age: $27.2{\pm}1.6yrs.$, body mass: $62.8{\pm}9.8kg$, height: $169.6{\pm}8.5cm$) performed normal gait (G) at preferred speed and maximum vertical jumping with one (OJ) and two (TJ) legs. While subjects were performing the given tasks, the hip, knee and ankle joint motion and ground reaction force was monitored using a 8-infrared camera motion analysis system with two forceplates. Simultaneously, electromyography of the triceps surae muscles, and the fascicle length of the medial gastrocnemius were recorded using a real-time ultrasound imaging machine. Results : Comparing to gait, the kinematic and kinetic parameters of TJ and OJ were found to be significantly different. Along with those parameters, change in the medial gastrocnemius (MG) muscle-tendon complex (MTC) length ($50.57{\pm}6.20mm$ for TJ and $44.14{\pm}5.39mm$ for OJ) and changes in the fascicle length of the MG ($18.97{\pm}3.58mm$ for TJ and $20.31{\pm}4.59mm$ for OJ) were observed. Although the total excursion of the MTC and the MG fascicle length during the two types of jump were not significantly different, however the pattern of length changes were found to be different. For TJ, the fascicle length maintained isometric longer during the propulsive phase than OJ. Conclusion : One-legged and two-legged vertical jumping use different muscle-tendon interaction strategies.

• 한국방사선학회논문지
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• 제8권7호
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• pp.397-400
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• 2014

본 연구의 목적은 필라테스 운동이 척추 측만증 환자의 요추 Cobb's angle에 어떠한 영향을 미치는지의 효과를 알아보는데 있다. 이 운동의 효과를 검증하기 위하여 필라테스 자세교정운동(PCE), 척추스트레칭운동(SSE), 근육강화운동(MSE)등을 시행하였다. 자세교정운동은 불균형한 근육에너지를 바로잡아주며 척추스트레칭 운동은 척추주변의 과 긴장된 근육을 이완시키고 근육강화운동은 주동근과 길항근의 균형을 잡아주어 척추 주변 근육의 탄력성과 유연성을 회복시켜주게 된다. 연구방법은 필라테스 적용 전과 적용 후의 X-ray 촬영에 의한 요추의 Cobb's angle을 측정하여 검증하였다. X-ray 촬영을 통한 Cobb's angle 실험 전 후의 결과는 필라테스 실시 후 약 5도 정도에서 통계적으로 유의하게 감소하였다(p=0.005). 따라서 필라테스 운동이 척추 측만증에 완화에 도움이 되는 것으로 나타났다.

• 드라이브 ㆍ 컨트롤
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• 제18권4호
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• pp.77-83
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• 2021

With the progress in virtual reality technology, various virtual objects can be displayed using head-mounted displays (HMD). However, force feedback sensations such as pushing against a virtual object are not possible with an HMD only. Focusing on force feedback, desktop-type devices are generally used, but the user cannot move in a virtual space because such devices are fixed on a desk. With a wearable force feedback device, users can move around while experiencing force feedback. Therefore, the authors have developed a wearable force feedback device using a magnetorheological fluid clutch and pneumatic rubber artificial muscle, aiming at presenting the elasticity, friction, and viscosity of an object. To date, we have developed a wearable four-degree-of-freedom (4-DOF) force feedback device and have quantitatively evaluated that it can present commanded elastic, frictional, and viscous forces to the end effector. However, sensory evaluation with a human has not been performed. In this paper, therefore, we conduct a sensory evaluation of the proposed method. In the experiment, frictional and viscous forces are rendered in a virtual space using a 4-DOF force feedback device. Subjects are asked to answer questions on a 1- to 7-point scale, from 1 (not at all) to 4 (neither) to 7 (strongly). The Wilcoxon signed rank test was used for all data, and answer 4 (neither) was used as compared standard data. The experimental results confirmed that the user could feel the presence or absence of viscous and frictional forces. However, the magnitude of those forces was not sensed correctly.

• 한국의류산업학회지
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• 제22권5호
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• pp.676-685
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• 2020

This study developed smart vests with heat and massage functions that changed patterns, designs, materials, etc., and evaluated their functions and satisfaction. A knitted fabric with good elasticity and a heating lining were used, and in consideration of this, the final vest pattern fitted to the upper body was completed. A heat pad was attached to the back, and 6 vibration motors were attached to the trapezius muscle. The controller was placed on the left chest for easy operation, and the battery was stored in an inner pocket under the controller. The heating effect of the smart vest, the location of the devices, and the ease of operation were excellent. When the massage function was operated, the thermal comfort was increased compared to when the massage function was not operated, and the high thermal comfort was perceived by the operation of heat and heat+massage function. Due to the battery, the weight, irritating contact of devices and wearing sensation decreased, but there was no reduction in wearing sensation due to heat and vibration devices. The greater the satisfaction with the massage function, thermal comfort, fit, appearance and weight, the greater the product satisfaction.

• 한국패션뷰티학회지
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• 제2권2호
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• pp.12-22
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• 2004

The purpose of this study is to present various ways for women to prevent and remedy the climacteric symptoms and to increase the health and quality of life of the women. The reason of this study focuses on this matter is that the conditions of climacteric era is connecter into the health of golden age. After examining the symptoms of the period, the researcher went over the foot heal care even recognized to the public. When the study considered the foot care as a medical service for the climacteric women, the method was expected as a way to improve the symptoms related to the climacteric diseases. This effect is also supported by the results of the clinical experiment and book media materials concerned. The main symptoms of climacteric period such as insomnia, irregular menstruation, stomach chill, stress were able to be decreased by feet bathing, and massage therapy on feet could also decrease pain of arms and legs, menstruation, headache and insomnia. The foot reflexology therapy made strengthen the periphery nerve, capillary vessels, and immune system, and increased the elasticity of blood vessels and the speed of the blood corpuscle, so they could enable to the blood circulation. The study expects the foot care to be positively method for climacteric symptoms with regular breathing, muscle relaxing exercise, acupuncture, exercise and alimentotherapy. The foot care doesn't have any side effects and could ives up to the modern people who want to keep their health and live long.

• 한국방사선학회논문지
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• 제7권6호
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• pp.427-431
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• 2013

본 연구의 목적은 특발성 척추 측만증 환자를 대상으로 요가 운동 요법을 통하여 척추 측만각도 즉 요추 Cobb's angle의 정도를 분석하여 요가 운동 프로그램이 특발성 척추 측만연구에 어떠한 영향을 미치는지의 효과를 알아보는데 있다. 본 연구의 요가 운동 프로그램은 척추주변의 근육들의 지나친 긴장을 풀고 이완된 근육은 수축운동을 통하여 유연성과 탄력을 회복하여 운동 시 주동근과 길항근의 균형을 맞추고 협력근과의 조화로운 상태가 척추측만에 도움될 것으로 판단하여 골반운동과 척추 비틀기 운동을 중심으로 실시하였다. 실험대상은 광주광역시 소재 C병원에서 특발성 척추 측만증 진단을 받은 여자 중학생을 대상으로 하여, 요가 운동 프로그램으로 주5일, 1일 60분, 12주간 실시하여 요가 운동프로그램이 특발성 척추 측만증 변화에 미치는 영향을 알아보고자 실시하였다. 실험 전, 후 방사선을 통하여 요추의 Cobb's angle을 측정하여 효과를 검증하였다. 첫째, 요가 및 척추 전문가와 함께 연구하여 동작을 추축하였다. 둘째, 개발된 척추측만증에 대한 요가 운동 프로그램을 특발성 척추 측만증을 갖고 있는 여중생에게 12주간 실시하였다. 셋째, 특발성 척추 측만증에 대한 요가 운동 프로그램에 대한 타당성과 효과를 검증하였다. 그 결과 운동 전보다 5도가 통계적으로 유의하게 감소하여 (p=0.006)특발성 척추 측만증이 개선되었다.

• 대한인간공학회지
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• 제34권3호
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• pp.199-215
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• 2015

Objective: The purpose of this study is to find the level of physical relaxation of individual subject by monitoring psychophysiological biofeedback to different types of mattresses. And, the study also aims to find a protocol to make a selection of the best mattress based on the measured information. Background: In Korea, there are an increasing number of people using western style bed. However, they are often fastidious in choosing the right mattress for them. In fact, people use their past experience with their old mattress as well as the spontaneous experience they encounter in a show room to finally decide to buy a bed. Method: Total five mattresses were tested in this study. After measuring the elasticity of the mattresses, they were sorted into five different classes. Physiological and psychological variables including Electromyography (EMG), heart rates (HR), oxygen saturations (SaO2) were used. In addition, the peak body pressure concentration rate was used to find uncomfortably pressured body part. Finally, the personal factors and subjective satisfaction were also examined. A protocol was made to select the best mattress for individual subject. The selection rule for the protocol considered all the variables tested in this study. Results: The result revealing psychological comfort range of 0.68 to 0.95, dermal comfort range of 3.15 to 6.07, back muscle relaxation range of 0.25 to 1.64 and personal habit range of 2.0 to 3.4 was drawn in this study. Also a regression model was developed to predict biofeedback with the minimal use of biofeedback devices. Moreover results from the proposed protocol with the regression equation and subjective satisfaction were compared with each other for validation. Ten out of twenty subjects recorded the same level of relaxation, and eight subjects showed one-level difference while two subjects showed two-levels difference. Conclusion: The psychophysiological variables and suitability selection process used in this study seem to be used for selecting and assessing ergonomic products mechanically or emotionally. Application: This regression model can be applied to the mattress industry to estimate back muscle relaxation using dermal, psychophysiology and personal habit values.

• 기술사
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• 제17권3호
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• pp.22-31
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• 1984

Sardine ant mackerel so called dark muscled fish have been underutilized due to the disadvantages in bloody meat color, high content of fat, and postmortem instability of protein. Recent efforts were made to overcome these defects and develope new types of product such as texturized protein concentrates and dark muscle eliminated minced fish. Approach of this study is based on the rapicl dehydration of foamed fish-starch paste by dielectric heating. In process comminuted sardine meat was washed more than three times by soaking and decanting in chilled water and finally centrifuged. The meat was ground in a stone mortar added with adequate amounts of salt, foaming agent, and other ingredients for aid to elasticity and foam stability. The ground meat paste was extruded in finger shape and heated in a microwave oven to give foamed, expanded, and porous solid structure by dehydration. Dielectric constant ($\varepsilon$′) and dielectric loss ($\varepsilon$") vcalues of sardine meat paste were influenced by wavelength and moisture level. Those values at 100KHz and 15MHz were ranged 2.25∼9.86 ; 2.22∼4.18 for $\varepsilon$′ and 0.24∼19.24 ; 0.16∼1.25 for $\varepsilon$", respectively, at the moisture levels of 4.2∼13.8％. For a formula for fish-starch paste preparation, addition of 20∼30% starch (potato starch) to the weight of fish meat, 2∼4% salt, and 5∼10% soybean protein was adequate to yield 4∼5 folds of expansion in volume when heated. Addition of egg yolk was of benefit to micronize foam size and better crispness. In order to provide better foaming and dehydration, addition of 0.2∼0.5% sodium bicarbonate foaming agent, was proper to result in foam size of 0.5∼0.7mm and foam density of 200∼400/$\textrm{cm}^2$ which gave a good crispness.

• 대한한방내과학회지
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• 제37권6호
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• pp.940-948
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• 2016

Objectives: This exploratory trial evaluated the possibility of quantitatively measuring several aspects during the "abdominal examination" of traditional Korean medicine. The main results of this study will be used to develop a new diagnostic device for abdominal examinations. Methods: Fifteen healthy volunteers were recruited for this study. Three certified Korean medical doctors assessed the existence of pressure pain, the elasticity of the abdominal muscle, and the tonus at CV12 as gold standards. Then, 2 well-trained investigators measured the pressure pain threshold (PPT), the indentation depth of a bar, and repelling force by pressing CV12. Each investigator measured the above 3 variables 2 times at 1 min intervals using a modified digital algometer. Reliability and validity tests of the 3 variables were performed. Results: There were statistically significant coefficients of intraclass correlation on the 3 variables both between and within the investigators (P<0.001). Also, PPT and repelling force showed statistically significant high sensitivity and specificity in a ROC curve. However, the indentation depth of the bar presented relatively low sensitivity. Conclusions: This new diagnostic method using a modified digital algometer could be a useful tool for quantitative measurement in "abdominal examinations". However, future rigorous clinical studies with a large population will be needed for the verification of its usefulness.