• Journal of Korean Academy of Nursing
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• v.23 no.2
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• pp.207-223
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• 1993

Inpatients are mostly occupied in bed with restricted activity, nearly all patient populations are at risk for the occurrence of skeletal muscle atrophy due to decreased level of activity. Restriction of mobility is far greater in pediatric patients compared with adult patients since almost all the activities of daily living is performed by parents or caregivers. It could be assumed that pediatric patients are more vulnerable to skeletal muscle atrophy than adult patients, however, there have been no attempts to reduce the atrophy of developing muscle. Therefore it is important to determine the effect of exercise in developing muscle during decreased activity. The purpose of this study was to determine the effect of periodic weight support during hindlimb suspension on the mass and cross-sectional area of Type I and II fibers in developing soleus(Type I ) muscle. To examine the effectiveness of periodic weight support activity in maintaining mass and fiber size. the hindlimb of young female Wistar rats was suspended(HS) and half of these rats walked on a treadmill for 45min / day(15min every 4h) at 5m / min at a 15 grade(HS-WS). After 7days of hindlimb suspension, soleus wet weight was 28. 57% smaller and relative soleus weight was 28. 21% smaller in comparison with con-trol rats (p〈0.05) Soleus wet weight and relative soleus weight increased by 67.72% and 71.43% each with periodic weight support activity during hindlimb suspension (p〈0.01, p〈0.005), moreover soleus wet weight and relative soleus weight of the HS -WS rats were greater than those of the control group. No change was observed in fiber type percentage of the developing soleus muscle after 1 week of hindlimb suspension plus weight support activity. Type I and II fiber cross-sectional areas of the developing soleus muscle were 50.45% and 43.39% lower in the HS group than in the control group (p〈0.0001), type I and II fiber cross-sectional areas of the developing soleus were 24.49% and 29.93% greater in the HS - WS group than in the HS rats (p〈0.0001), whereas Type I and II fiber cross-sectional areas of HS - WS group were less than those of the control group, The results suggest that periodic weight support activity can ameliorate developing soleus muscle atrophy induced by hindlimb suspension, even in type II fibers that would not have been expected to be recruited by this type of neuromuscular demand. Clinical experimental study is needed to deter-mine the effect of periodic weight bearing exercise on developing atrophied leg muscle based on these results.

• Archives of design research
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• v.6 no.1
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• pp.23-46
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• 1993

The development of technology in modern industrial world which grows and changes every day is shortening the cycle of life span of products, so there is a flood of products around us. It is enough to say that this phenomenon leads to further emphasis on the aspect of design for human being. It is not a new fact that to design for the rational function and the modeling from to make a combination and to satisfy consumers' desire is a short cut to gain competitive superiority in developing new products for MIS security. Therefore the design which plays a leading role in the activity of creating more convenient, more aesthetic, and more econemical products is called 'NEW CORPORATE WEAPON'. The amount of effort made for developing products is different in each company, but recently the plan to develope new products and its process arouse more interest. This thesis purports to improve objective understanding about the development of design by investigating products development research and the process of analysis and designing as a case study on developing a domestic supersonic humidifier. This thesis consists of five chapters in all. In chapter one as a preface, the purpose the method and the scope of the study is described. Chapter two contains my effort to grasp the background of study on the design and the basic structure of supersonic humidifier. Chapter three is an examination into the present conditions of supersonic humidifier used in domestic and foreign area, and the shape of design. In chapter four, a guide for the development of design is established. The idea sketch based on a fundamental shape and the drawing are added to this. In chapter five on the basis of the result of analysis in the preceding research I describe the development of design of products on the premise that marketing gives proof for them but the products oriented by manufacturer are not included in this case. In this thesis, I try to recognize the process of the develpment of design and the importance of the plan for design in developing products by examining an investigative and analytic study on the design of products.

• Corrosion Science and Technology
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• v.13 no.4
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• pp.139-144
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• 2014

In corrosion-sensitive area of exsisting unpainted weathering steel bridge with closed box girder structure. there are some serious local corrosion problems because of rain water or dew water which can not be solved by conventional maintenance method. These problems must be technically controled because of the influence on the safety of bridge. This study is the first stage of developing the economic corrosion control manual for these local corrosion problems. Through the injecting experiment of tar sealant into the crevice of mock-up equipment, it was proofed that the corrosive sealant can be useful to corrosion control at crevice of corrosion sensitive area.

• Journal of Korean Academy of Nursing
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• v.33 no.8
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• pp.1135-1144
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• 2003

Purpose. This study was conducted to understand the degree of internet addiction tendency and to find out the factors influencing this addiction tendency among middle school students in Gyeong-buk area. Methods. A total of 450 middle school students in the Daegu and Gyeong-buk area were surveyed in this study. Data collection was conducted through the use of questionnaires. Results. Internet addiction among middle school students was relatively low (Average user). In the overall ratio distribution, however, students who were classified as either addicted or at risk of addiction accounted for a high percentage, 27%. A positive correlation was found between Internet addiction and Internet expectation, depression and parent control over Internet use. A negative correlation was found between Internet addiction and interpersonal relationship, parent support and self-control. Multiple regression analysis revealed that the most powerful predictor of Internet addiction tendency was depression. Conclusion. Through the above results, it would be necessary to develop an Internet addiction prevention program for adolescents taking into account for the psychological factors such as depression and Internet use habits. In the future study, the need assessment will be useful for developing this prevention program.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.33 no.4
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• pp.201-208
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• 2010

This research is about developing an efficient solution procedure for the vehicle routing problem under varying vehicle moving speeds for hour-based time interval. Different moving speeds for every hour is too difficult condition to solve for this type of combinatorial optimization problem. A methodology to divide the 12 hour based time interval offered by government into 5 different time intervals and then divide delivery area into 12 small divisions first and then re-organizing them into 5 groups. Then vehicle moving speeds are no longer varying in each of the 5 divisions. Therefore, a typical TSP solution procedure may be applied to find the shortest path for all 5 divisions and then connect the local shortest paths to form a delivery path for whole area. Developed solution procedures are explained in detail with 60 points example.

• Journal of The Korean Society of Agricultural Engineers
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• v.49 no.5
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• pp.45-54
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• 2007

The purpose of this paper is to test the applicability of the rural amenity values assessment model(RAVAM) to a case study area. To verify the practical applicabilities of the RAVAM, south-east area of Kyounggi province was selected as a study area. Full data of 101 Myuns of Kyounggi province were gathered with Geographic In-formation System(GIS) and Remote Sensing(RS) techniques. All the 101 Myuns' rural amenity resources were assessed. Cluster analysis was performed on almost intact nature, interaction between nature and man, man-made amenity values to classify rural amenity characteristics. It was expected that the proposed RAVAM could be used in developing rural development plans considering local rural amenity resources' distribution.

• Korean Journal of Adult Nursing
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• v.20 no.4
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• pp.626-640
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• 2008

Purpose: The aim of this study was to construct leisure physical activity model of middle-aged women in urban area. Methods: Data were gathered by self-report questionnaire from 211 women aged between 41 and 59 years in urban community. The data were analyzed using the SPSS/WIN 10.0 program and the model was constructed using the LISREL 8.54 program. Results: Variables that have direct effects on leisure physical activity were health state, past leisure physical activity, social support, self-efficacy, and affect. Perceived leisure state and behavioral leisure attitude also influenced leisure physical activity in an indirect way. Perceived leisure state had a direct effect on self-efficacy. Behavioral leisure attitude, past leisure physical activity, and experience of exercise effect had significantly direct effects on affect Conclusion: It will provide basic information for developing strategies of programs to enhance leisure physical activity of middle-aged women in urban area.

• The Korean Journal of Ecology
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• v.14 no.2
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• pp.195-210
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• 1991

The primary succession of the pebble area in gye-bang chon, an upper stream bank of north han river, was investigated by belt transect method from July to October 1990. The stsges of bare area, herbaceous pioneer, perenial herb, woody plants and pine stand were recognized from stream bank to inland. The change of the coverage in herbaceous plants increased with developing sueccessional sere but decreaser with increment of woody plants. The species sequence cyrves vs. relative coverage were geometric in pioneer stage and graduaiiy changed to lognormal y\type as the development of forest. The species diversity was highest during then woody plants stage, probably it would to be the edge effect. The soil properties were not noticeable difference between stream side and inland side. It seems that the vegetational developement was not enough to affect soil accumulation.

• KIEAE Journal
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• v.4 no.3
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• pp.15-26
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• 2004

This study aims at developing environmental indicators to evaluate sustainability of district unit planning in Seoul. The indicators are devised to evaluate three categories of influencing areas such as district planning area, surrounding areas of planning area, and city wide area. In order to formulate the environmental indicators, subsystems of the environment were reviewed and classified into seven sectors of the environment such as air and climate, soil, water, green space, fauna, noise, and landscape. 16 indicators were developed from the seven sectors. Weighing were given to each indicator resulting from AHP analysis of the questionnaire survey of environment and urban planning experts.

• 제어로봇시스템학회:학술대회논문집
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• 1990.10b
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• pp.1004-1008
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• 1990

This research focuses on developing a new and computationally efficient algorithm for free space structuring and planning collision free paths for an autonomous mobile robot working in an environment populated with polygonal obstacles. The algorithm constructs the available free space between obstacles in terms of free convex area. A collision free path can be efficiently generated based on a graph constructed using the midpoints of common free links between free convex area as passing points. These points correspond to nodes in a graph and the connection between them within each convex area as arcs in this graph. The complexity of the search for collision free path is greatly reduced by minimizing the size of the graph to be searched concerning the number of nodes and the number of arcs connecting them. The analysis of the proposed algorithm shows its efficiency in terms of computation ability, safety and optimality.