• 한국근적외분광분석학회:학술대회논문집
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• 한국근적외분광분석학회 2001년도 NIR-2001
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• pp.1158-1158
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• 2001

Fast and dynamic biochemical, enzymatic and morphological changes occur during the so-called generative development and during the vegetative processes in seeds. The most characteristic biochemical and compositional changes of this period are the formation and decline of storage components or their precursors, the change of their degree in polymerization and an extensive change in water content. The aim of the present study was to detect the maturation processes in seed nondestructively and to verify the applicability of near infrared spectroscopic methods in the measurement of physiological, chemical and biochemical changes in wheat seed. The amount and variation of different water “species” has been changed intensively during maturation. Characteristic changes of three water absorption bands (1920, 1420 and 1150 nm) during maturation were analysed. It was concluded that the free/bound transition of water molecules could be followed sensitively in different region of NIR spectra. Kinetic changes of carbohydrate reserves were characteristic during maturation. An intensive formation and decline of carbohydrate reserves were observed during early stage of maturation (0 -13 days, high energy demand). An accelerated formation of storage carbohydrates (starch) was detected in the second phase of maturation. Five characteristic absorption bands were analysed which were sensitive indicators the changes of carbohydrates occurred during maturation. Precursors of protein synthesis and the synthesis of reserve proteins and their kinetic changes during maturation were followed from NIR spectra qualitative and qualitatively. Dynamic formation of amino acids and the changes of N forms were detected by spectroscopic, chromatographic and by capillary electrophoresis methods. Calibration equations were developed and validated in order to measure the optimal maturation time protein and moisture content of developing wheat seeds. The spectroscopic methods are offering chance and measurement potential in order to detect fine details of physiological processes. The spectra have many hidden details, which can help to understand the biochemical background of processes.

• Journal of Biosystems Engineering
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• 제35권5호
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• pp.357-365
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• 2010

Workers in the agricultural industry have been exposed to many work-related musculoskeletal disorders. So, our objectives in this study were to measure and analyze worker's physiological bio-information to reduce musculoskeletal disorders in relation to agricultural works. We investigated worker's bio-information of physiological signals during the repeated lifting work such as body temperature, heart rate, blood pressure, physical activity, and heart rate variability. Moreover, we analyzed the workloads of lumbar spine during the repeated lifting work using the 3-axis acceleration and angular velocity sensors. The changes of body temperature was not significant, but the mean heart rate increased from 90/min to 116/min significantly during 30 min of repeated lifting work (p<0.05). The average worker's physical activity(energy consumption rate) was 206 kcal/70kg/h during the repeated lifting work. The workers' acute stress index was more than 80, which indicated a stressful work. Also, the maximum shear force on the disk (L5/S1) of a worker's lumbar spine in static state was 500N, and the maximum inertia moment was 139 $N{\cdot}m$ in dynamic state.

• 지역사회간호학회지
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• 제18권1호
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• pp.69-78
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• 2007

Purpose: This study was to determine the effects of a combined exercise program and telephone counseling in obese middle-aged women. The study also attempted to measure the effects of the program on physiological functions, self-efficacy and depression. Method: This research employed a nonequivalent control group pretest-posttest design. The experimental group consisted of 29 obese middle-aged women, and the control group of 30 women. The subjects in the experimental group participated in a combined exercises program and telephone counseling for 12 weeks. Results: After performing the program for 12 weeks, BMI (p=.000), percent body fat (p<.007), TC (p=.026), TG (p=.035) and depression (p=.012) in the experimental group decreased significantly compared with the control group. Self-efficacy (p=.000) in the experimental group increased significantly compared with the control group after the program. Conclusion: From these findings, it was confirmed that a combined exercises program and telephone counseling for obese middle-aged women can increase self-efficacy and decrease BMI, percent body fat, total cholesterol, triglyceride and depression. Therefore, this program can be utilized for various population groups including women, and further researches are required on programs for men.

• 한국식품저장유통학회지
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• 제8권3호
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• pp.258-263
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• 2001

마늘을 $0^{\circ}C$에서 일반 대기 및 CA 조건 하에서 4개월 저장하면서 기간 및 조건에 따른 저장 중 마늘의 생리적 품질을 폭정하고 pungency와 fructan 등의 화학적 성분 변화를 분석하였다. 저장 중 마늘의 생리적 품질은 저장 조건에 대해서 큰 차이는 없었으나, CA 저장한 마늘이 일반 대기에서 저장한 마늘에 비해서 수분 감량이 더 많이 일어나 dry weight와 경도가 낮게 나타났다. 표면색은 저장 4개월에서 어둡고 진하게 변했다. CA 저장이 마늘의 발근은 억제하지 못하지만 발아율은 일반 대기저장에 비해서 약 50% 억제하는 것으로 나타났다. 일반 대기에서 저장한 마늘이 CA 저장한 마늘보다 더 높은 pungency를 나타내었으며 특히 pyruvate는 산소 농도가 닻은 (1% $O_2$) CA 저장 조건에서 가장 낮은 값을 나타내었다. Fructan은 저장기간에 따라서 점차 감소하는 경향을 나타내었고 fine sugar는 점차 증가하였다. 발아율이 높은 일반 대기 저장의 fructan 함량이 CA 저장의 경우보다 낮은 값을 나타내었다 그러나 20%의 이산화탄소 농도에서 저장한 마늘의 fructan이 가상 많이 감소하는 경향을 보였다

• 한국조경학회지
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• 제31권4호
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• pp.49-56
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• 2003

This study is to find physiological effects of acoustic information on landscape preference. Both the volume and the rate of $\alpha$-waves and $\beta$-waves were used to measure the effects in the study. The result of this study are summarized as follows: The outputting amount of $\alpha$-waves are sorted by different types of visual and acoustic factors. The results show that acoustic factors interacted with visual factors. That is, although visual factors are positive, the volume of $\alpha$-waves depends upon the character of acoustic factors; positive acoustic factors produce more $\alpha$-waves than negative or neutral(soundless) acoustic factors. Also the volume of $\alpha$-waves increase in the case of positive acoustic factors even if there is the same negative visual information. The results show that the volume of $\alpha$-waves increase without connecting with the types of visual factors. The volume of $\beta$-waves are largely reduced when visual stimulus is positive and soundless stimulus is provided. On the other hand, they generally increase when both visual and acoustic stimuli are negative, which fosters extremely unstable, tense and upset stress. The rate of $\alpha$-waves increase according to supplying positive acoustic factors in the opposed visual factors. The rate of wave(shouldn't be $\alpha$-waves\ulcorner) is high if both visual and acoustic factors are positive, so it is the most comfortable and causes no stress. Preference is the lowest if visual and acoustic factors are negative, but a -waves are conspicuously low in positive visual and negative acoustic factors.

• 한국의류학회지
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• 제26권11호
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• pp.1672-1681
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• 2002

To evaluate the thermal environments and the workload of farmers in the rice field in summer, this study investigated rice farmers' physiological, psychological responses, work postures, work clothes, air temperature and air humidity during the spraying pesticide in the rice field. Five career farmers (3 males, 2 females) volunteered as the subjects. During the spraying pesticide in the rice field, physiological responses were monitored continuously. The results were as follows. l. Farmers wore only raincoats not pesticide-proof clothing. 2. The value of WBGT, rectal temperature($T_{re}$), mean skin temperature(${\={T}}_{sk}$) were $24.9∼28.9^{\circ}C,\;37.8({\pm}0.3)^{\circ}C\;and\;33.6({\pm}0.6)^{\circ}C$, respectively. Clothing microclimate temperature($T_{cl}$) on the chest and back were $32.5({\pm}2.6)^{\circ}C\;and\;33.6({\pm}2.6)^{\circ}C$, respectively(p<0.00l). Humidity inside of the clothing ($H_{cl}$) was over 80%RH and heart rate(HR) was 112(${\pm}27$)bpm. We evaluated that the spraying pesticide was 'heavy work' by the Tre and HR. To four subjective questionnaires, all farmers expressed 'hard, hot, humid and uncomfortable' without individual difference at the end of works. We suggested that 1) the spraying pesticide in the rice field was a heavy work, 2) because the workload of farmers in the raincoat/pesticide-proof clothing can't be evaluated by only WBGT, assessors should measure physiological, psychological responses as well as thermal environments, 3) to alleviate farmers' heat strain, clothing manufacturers must consider not only the improvement of textile materials and clothing weight but also the designing of personal cooling equipment.

• 대한의용생체공학회:의공학회지
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• 제29권1호
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• pp.40-45
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• 2008

Therapeutic ultrasound which is developed for rehabilitation therapy have already been used for healing joint contracture, synechia, acute and chronic inflammatory diseases. Medical devices for pain-relief and healing using therapeutic ultrasound are actively being developed. This study measured the change of PTT with the transmitted ultrasound through the human body to find out the increase of compliance of blood vessels. Measurement method of PTT in this study is employed as useful ways to acquire physiological information of patients in the clinical case in order to measure the change of mechanical characteristics of blood vessels. This study confirmed the PTT change of rehabilitation patients through the thermal effects of ultrasound by using PTT and also found that it is possible to increase PTT by adjusting the warm water and ultrasound. The increase of PTT means the decrease of the pulse wave velocity from the cardiovascular system to the peripheral arteries. The physiological effects occurred using the warm water and ultrasound.

• 한국안전학회지
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• 제29권1호
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• pp.47-53
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• 2014

The application of advanced Main Control Room(MCR) is accompanied with lots of changes and different forms and features through the virtue of new digital technologies. The characteristics of these digital technologies and devices give many opportunities to the interface management, and can be integrated into a compact single workstation in advanced MCR so that workers can operate the plant with minimum physical burden under any operation conditions. However, these devices may introduce new types of human errors and thus a means to evaluate and prevent such errors is needed, especially those related to characteristics of digital devices. This paper reviewed the new type of human error hazards of tasks based on digital devices and surveyed researches on physiological assessment related to human error. An experiment was performed to verify human error hazards by physiological responses such as EEG which was measured to evaluate the cognitive workload of operators. And also, the performances of four tasks which are representative in human error hazard tasks based on digital devices were compared. Response time, ${\beta}$ power spectrum rate of each task by EEG, and mental workload by NASA-TLX were evaluated. In the results of the experiment, the rate of the ${\beta}$ power was increased in the task 1 and task 4 which are searching and navigating task and memory task of hierarchical information, respectively. In case of the mental workload, in most of evaluation items, task 1 and 4 were highly rated comparatively. In this paper, human error hazards might be identified by highly cognitive workload. Conclusively, it was concluded that the predictive method which is utilized in this paper and an experimental verification can be used to ensure the safety when applying the digital devices in Nuclear Power Plants (NPPs).

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2010년도 춘계학술대회
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• pp.852-855
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• 2010

현재 컴퓨터 네트워크 기술의 비약적인 발전에 힘입어 USN은 시간과 장소에 구애받지 않으며 사용자가 컴퓨터나 네트워크를 인식하지 못하고 통신 환경에 접속할 수 있는 수준에 까지 이르게 되었다. 더욱이 지금은 개개인의 건강에 관심이 높아지고 있어 건강을 관리하고 예방할 수 있는 의료 분야에서도 USN의 기술 발전과 더불어 다양한 분야에서의 적용이 시도 되고 있다. 본 논문은 병원에 입원한 환자를 관리하는 의사나 간호사가 손쉽게 환자의 혈압 및 혈당에 관련된 생리학적 데이터를 측정하고 관리할 수 있게 유비쿼터스 센서 네트워크 기반의 RF 통신을 이용한 시스템을 설계하고 구현한다. 또한 MsSQL 데이터베이스를 이용하여 환자에게서 수동 및 능동적으로 측정한 혈압 및 혈당 정보를 저장하고 관리할 수 있는 데이터베이스를 설계한다. 따라서 환자의 생리학적 데이터를 실시간으로 관리하고 응급상황에 즉각적으로 대처할 수 있으므로 환자들에 대한 의료 서비스 향상에 기여할 뿐만 아니라 의료서비스 환경에 대한 패러다임 변화를 기대할 수 있다.

• 한국환경과학회지
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• 제31권3호
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• pp.219-226
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• 2022

This study was conducted to investigate the response of the human body to stress induced by wall recording of subway stations in the city center. The experiment was conducted as a simulation exercise, and six images were selected and produced based on Subway Line 2, a representative underground space in Seoul. The study participants included 24 male and female college students. A three-minute experiment was conducted, during which the participants were shown the control image and green wall image once each. To measure psychological status, the following measurement indicators were used: Semantic Differential, Positive Affect and Negative Affect Schedule and State-Trait Anxiety Inventory. Physiological changes were investigated by tracking participants' heart rate and blood pressure. Results showed that parasympathetic and sympathetic nerves were activated in the presence of the green wall in the subway station. The psychological evaluation analysis revealed that negative affect toward underground space decreased, while positive affect increased. This study found that the green wall in subway stations has a stable effect on the human body, both psychologically and physiologically. In the future, green walls in underground spaces can be used to reduce psychological stress and increase physiological relaxation.