• Journal of Nutrition and Health
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• 제23권7호
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• pp.504-512
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• 1990

In experiment 1, dietary self-selection of the 3 macronutrients, protein, fat, and carbohydrate were examined in male rats given 3 food cups of 80% carbohydrate, 80% protein, and 70% fat diets simultaneously. All the rats showed normal growth pattern and organ weight, which means they have ability to select just right kinds and amounts of nurients in order to support their growth and development. Mean values of caloric intake, body weight gain, serum lipid values and empty carcass compositions were not significantly differ between the upper and lower quartile groups of fat proportion of empty carcass compared to the lower quartile group(LF). Same feeding design was employed in experiment 2 where the effect of mild electric stress on food selection was studied. The rats in both control and electric stress group revealed a normal growth curve and organ weights. The rats in both control and electric stress group revealed a normal growth curve and organ weights. The stress group showed higher caloric intake and body weight gain than control group, but no significant effects of stress on serum and empty carcass components was found. Even though normal rats seemed to select macronutrients according to their physiolosical needs, there were individual differences in food selection whether they were exposed to stress or not. Therefore life long individual food selection pattern may have a great influence on nutritional status and chronic degenerative diseases of eldery, and on aging process.

• 동서간호학연구지
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• 제20권2호
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• pp.73-80
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• 2014

Purpose: This research aims to identify the physio-psychological effects of applying a qi massage program as an independent complementary intervention for employees with hypertension in a workplace. Methods: A quasi-experimental design was employed using a nonequivalent control group with pre- and post-tests. The study was performed from August 18 to October 10, 2008 on hypertensive employees being treated with a qi massage program in a company. The control group was recruited first to prevent treatment diffusion. The experimental group was subsequently recruited and received individual treatment for 30 minutes. Collected data was analyzed using SPSS16.0 version. ${\chi}^2$-test, Mann-Whitney U test, Wilcoxon signed ranks test, Fisher's exact test and paired t-test were implemented in order to examine the effects of individual intervention on patients who are treated with the qi massage program. Results: The experimental group showed a greater improvement in systolic blood pressure, diastolic pressure, stress, and quality of life than did the control group. Conclusion: A qi massage program may be implemented as a complementary intervention to effectively treat hypertensive persons.

• 정보학연구
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• 제3권1호
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• pp.177-189
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• 2000

본 연구에서는 직무스트레스에 직접적인 영향을 줄 수 있는 공식화된 과업환경이 개인의 통제위치에 따라 어떤 차이를 보이는가에 대해 목적을 두고 연구를 진행하였다. 연구방법은 실증연구법을 택하였으며, 두 개의 가설을 설정하고, 검증하였다. 연구결과는 공식화된 과업환경을 많이 인지하는 사람일수록 직무스트레스를 더 많이 지각한다는 결론을 얻었다. 하지만 통제위치의 조절역할 여부는 알아볼 수 없었다. 하지만 Fisher의 Z분석 값이 90% 신뢰수준에서는 지지될 수도 있기 때문에, 표본의 크기를 늘린다면 유의한 결과를 얻을 수 있을 것으로 사료된다.

• Journal of Information Technology Applications and Management
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• 제23권1호
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• pp.61-77
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• 2016

This study derived research model about the influencing factors of the successful performance of smart work. Research model is composed of four perspectives: technology perspective like system quality and usage level of information technology, interaction perspective like innovational climate, institutional perspective like personnel evaluation, and individual perspective like self-control. This study collected 155 survey data from K public company and M global software company. As a result of data analysis, all of four perspectives influenced smart work performance. Technology perspective had the strongest effect on smart work performance, the second was institution perspective, the third was interaction perspective, and the last was individual perspective. In conclusion, smart work is not an IT project. We have to reconsider the thinking that just only the introduction of cutting-edge IT increases business performance. Smart work project should be pursued in harmony with institution and climate in the organizational perspective and self-control in the personal perspective. Also, to maximize business performance in smart work environment, organizations should strengthen the positive factors and overcome the negative factors.

• 한국정밀공학회지
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• 제27권12호
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• pp.67-74
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• 2010

The fabrication method of aspheric lens is changed from machining to press molding so as to improve the productivity. In the case of the press molding method, the temperature control of the molding die is most impotent, because the temperature of each molding die determines the quality of lens. But any practical method for direct measuring of the lens temperature and the die internal temperature is yet unknown. Besides, in the case of the press molding system in which the heating and pressing and cooing of a die is done at one work station, the cycle time for the system is yet too long. The paper shows an improved structure of radiant sequential system in which the heating and pressing and cooing of dies is done at individual work station so as to cut down the cycle time. To know the die internal temperature, numerical results are given using ANSYS. An experimental radiant sequential system is developed and tested. Finally, the Taguchi method is applied in order to optimize the setting conditions of individual work station.

• International Journal of Advanced Culture Technology
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• 제8권2호
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• pp.139-145
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• 2020

Individual personality traits are key factors that affect users' self-disclosure on SNS. We examined the relationship between an individual personality trait (i.e., narcissism) and three dimensions of self-disclosure behavior on Facebook (i.e., intention, level, and control of self-disclosure). A total of 261 Facebook users completed an online survey. The findings showed that more narcissistic individuals engage in deeper levels of self-disclosure and do so with greater intentionality than previous research indicated. More interestingly, narcissistic users simultaneously tend to control their expressions in public by concealing who they really are. Overall, these findings suggested that the self-disclosures on Facebook must not investigated by a single dimensions for better understanding of psychological dynamics of it users. In addition, the present research suggested that the narcissism should not be regarded as a predictor which simply gives either a positive or negative influence on self-disclosing behaviors in SNS.

• KIEAE Journal
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• 제7권5호
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• pp.81-86
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• 2007

The research analyzes the arrangement of boiler and hot water header, the method of radiator pipe setting, hot water supply control, hourly heating situation of each room for underfloor radiant heating systems in Korea and suggests an alternative to improve to efficient heating method. One of the best options for install position of hot water distributor is under kitchen sink which is center point of all rooms, according to previous research of the energy saving strategies. When the radiator pipes are arranged to each individual room instead of bedrooms through livingroom and kitchen, it has energy saving effects. For rooms without occupancy according to a time period, hot water supply method should be intermittent heating rather than continuous heating. For this intermittent heating method, individual control of hot water supply is more practical, and it can lead to massive energy savings. The intermittent heating system has time-lag, so it is more effective in energy saving with mild and comfort condition if the spaces are preheated by automatic control equipment prior to required time.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.747-753
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• 2009

Planning the construction for a system of bored piles in building foundation engineering is (1) to predict the time duration required to complete all the bored piles with due consideration of relevant engineering factors and site constraints; then (2) to predict the total project time generally by aggregating the predicted working duration for construction of each bored pile. The duration for construction of an individual bored pile results from analyzing various working sequences and different activity duration (such as predrilling, excavation, steelfixing, air-lifting, and concreting, etc.), which is informed by experiences and site records of previous projects. However, determining the project duration for constructing many bored piles on one site is much more complicated than adding up the time duration for individual piles. In practice, project schedules are often found to be unrealistic and incorrect during the construction stage. This is because construction planning is not based on a exhaustive and comprehensive evaluation of site factors, such as site layout plan, site constraints, quality control, environmental control, safety control and logical relationships between different trades. In this paper, we identify those factors based on a foundation engineering site in Hong Kong with ninety-seven bored piles and address their effects on uncertainties in activity time and project time.

• 대한인간공학회지
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• 제19권2호
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• pp.47-61
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• 2000

To study the characteristic of the weight center control of humans, the tracking control capability of circular and wave motion by weight center movement was conducted by using the force platform. The control performance(the integrated value of the $|Object\;value(X)-Control\;Value(Y)|^{2}$) and control trace record was used to evaluate the individual performance characteristics. The size of the population for this study was 73, which consisted of engineering students, students majoring in taekwondo, students majoring in dance, all of which were in their twenties, and also people in their sixties. The results of this study indicate that the weight center control characteristics of humans can be represented by the evaluation method and values. People who were capable of tracking the object did not stop nor overshot the objective. In addition, habits or training characteristics and aging seemed to influence the performance of the subjects. In the future, development of different objectives for weight center control could be used to determine the severity of the disease of the subject and the effects of the treatment.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회A
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• pp.1132-1137
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• 2007

This paper describes a Unified Chassis Control (UCC) strategy to prevent vehicle rollover by integrating individual modular chassis control systems such as Electronic Stability Control (ESC) and Continuous Damping Control (CDC). The UCC threshold is determined from a rollover index computed by estimated roll angle, roll rate and measured lateral acceleration. A direct yaw moment control method is used to design the ESC based on a 2-D bicycle model. Similarly, the CDC is designed based on a 2-D roll model using a direct roll moment control method. The performance of the proposed UCC scheme is investigated and compared to that of modular chassis controllers through computer simulations using a validated vehicle simulator. It is shown that the proposed the UCC can lead to improvements in vehicle stability and efficient actuation of chassis control systems.