• 한국산업보건학회지
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• 제17권3호
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• pp.203-211
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• 2007

This study was conducted in cut rose cultivation field in Goyang to evaluate pesticide exposure of farmers and the relationship between the exposure and work environment/method for cut rose farmers. Dermal exposure was assessed with patch (thin chromatography layer paper), cotton glove by body parts during mixing and spraying works in which pyrethroid, organophosphate, carbamate pesticide were used in 4 cut rose greenhouses located in Goyang province, checking characteristics of environment/working method at the same time. Body parts assessed were as follows ; glove : hand, patch : head, neck(front/back), chest, back, shoulder(right/left), upperarm(right/left), forearm(right/left), thigh(right/left), shin(right/left). Pesticides were analyzed using gas chromatography(NPD/FID) after extracting with ethyl acetate. Exposure amount differed according to pesticide type. But after standardizing with total net weight of pesticide sprayed, there were no significant difference among pesticides. There were significant difference in exposure amount among body parts(especially exposure amount of thigh, shin were more than the others), which means exposure happen not by pesticide dispersion in air but by contact with cut rose(leaf, branch) indirectly. Walking forward during spraying made farmers more exposed than waling backward, these results means contacts with leaves/branches made exposure happen in cut rose greenhouse also. As a result, pesticide exposure in cut rose greenhouse was related with contact of leaf/branch which pesticide remained in, which made exposure pattern (especially exposure amount) differ by body parts

• 한국운동역학회지
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• 제24권4호
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• pp.349-357
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• 2014

The purpose of this study was to examine the differences in the performance of dancing motions depending on the level of skill by investigating pulmonary functions, ground reaction force, and jerk cost. The subjects of this study were 12 professional dancers (career: 16 yrs) and 12 amateur dancers (career: 9 yrs) who had similar physical conditions. We selected four motion phases which included the diagonal line motion, the deep flexion motion, the breath motion, and the turn motion with one leg after a small step walking motion, with Goodguri Jangdan. In the experiment, 6 infrared cameras were installed in order to analyze the value of the jerk costs and the force plate form. Finally, we measured the pulmonary functions of the subjects. For data analysis, independent t-tests according to each event, were carried out in the data processing. According to the results of FVC % Predicted, the professional dancers showed greater lung capacities than the amateur dancers, indicating that the level of dancing skill influences lung capacity. Based on the result of the balance test, the professional dancers used more vertical power than did the amateur dancers when performing maximal flexion motion. The professional dancers used a propulsive force of pushing their body forward by keeping the center of body higher while the amateur dancers used a braking power by keeping their bodies backward. When performing medial-lateral movements, the amateur dancers were less stable than the professional dancers. There were no differences in values of jerk costs between the amateur dancers and the professional dancers.

• 대한통합의학회지
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• 제8권4호
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• pp.107-115
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• 2020

Purpose: This study aims to systematically review the dual-task evaluation applied to the screening of mild cognitive impairment. It also aims to present various evaluation items and results analysis methods for dual tasks applied to patients with mild cognitive impairment. Methods: We conducted a systematic search of published studies in PubMed databases and KISS from January 2000 to August 2020 using the main keywords such as "Dual task," "Mild Cognitive impairment," "Elderly," and "Screening." We selected a total of 10 studies for the analysis from 1314 searched articles. Results: We analyzed the qualitative level of 10 studies that were nonrandomized two-group studies with evidence level II (100.0%). These results suggest that the evidence level of the studies was high. We analyzed 10 studies and identified 12 motor tasks and 19 cognitive tasks. Walking was the most commonly used evaluation motor task and counting backward by ones and naming animals were the most commonly used evaluation cognitive tasks. Moreover, the velocity speed was the most used result analysis method. The results indicate that there were significant differences in dual-task performance between patients with normal and mild cognitive impairment. Conclusion: The results of this study can be used as a basis for the selection of dual-task evaluation items and methods of analyzing the results for screening mild cognitive impairment. Furthermore, they are expected to be used for research on the development of dual-task evaluation tools. It is necessary to compare and analyze the usage trends of dual-task evaluation by cultural differences in future studies.

• 한국컴퓨터그래픽스학회논문지
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• 제27권3호
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• pp.55-63
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• 2021

본 연구는 모바일 가상현실에 적합한 이동 상호작용을 제공하기 위한 인터페이스를 제안하고 비교 실험을 통해 분석한다. 제안하는 인터페이스는 접근성과 활용성을 고려하여 모바일 HMD를 제외한 추가적인 장비를 사용하지 않는 것을 전제로 한다. 그리고 사용자의 시선을 활용하여 이동 상호작용을 제어하는 인터페이스를 두 단계로 나누어 설계한다. 핵심은 가상현실에서의 직선 이동이 유발시킬 수 있는 멀미 등의 부정적 요인의 발생을 최소화하는 것이다. 이를 위해 시선을 지면으로 향하여 이동하도록 전/후진 버튼으로 구성된 인터페이스, 실제 걷기 동작에서의 시선 변화를 고려하여 정면 상단에 좌, 우버튼으로 구성된 인터페이스의 두 단계를 설계한다. 제안한 인터페이스를 통한 이동 상호작용을 비교 분석할 수 있는 어플리케이션을 제작하고, 사용자를 대상으로 만족하는 인터페이스 경험과 이동 과정에서의 부정적 영향을 확인하기 위한 설문실험을 진행한다. 이를 통해 제안한 이동 상호작용이 사용자에게 만족하는 인터페이스 경험과 함께 멀미와 같은 부정적 영향을 감소시키는 것으로 확인되었다.

• The Journal of Korean Physical Therapy
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• 제6권1호
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• pp.23-35
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• 1994

In this research, the mentally-handicapped children being able to be trained were investigated the actual condition of train function making 40 mentally-handicapped children in Kummi Hyedang Spacial Education School, to exmine the effect of physical exercise function when training the mentally-handicapped children who can be trained as applying exercise education programs, and trains for 10 weeks by assigning to both experiment group and control group according to children who are similar to training functions from pre-examination. The results are in following: First, the results of test in the exercise ability of mentally-handicapped children with the degree of being able to trained are very delayed in comparison with normal mental children through the both top and bottom examination. The developments of 5 exercise functions classified by domain, have the order of eyesight exercise, softness, physical strength, quickness, parallelism, the interaction of both eye and hand, and, have the exercise function being equal to the level of between 6 and 12 years old. In 13 bottom test, throwing bean-bag is equal to the nomal 12 years old boy. the board jump, sitting position / bending forward / closing are equal to the level of 12 years old boy. standing with only leg is the level of 9 years old, threading pearls is 7 years old, transfering the wood building, picking the upper body up, walking board, balancing one leg with opened, eye, fist / opening palm / palm, bending and opening arm with postrating on chair, are the exercise functions of below 6 years old. Second, there are great effects in carrying out the exercise education program to the mentally-handicapped children with the level of being able to trained. In experiment group, it is elevated to the middle level of 12 years old nomal children. Classified by domain of test the board jump, training, the bean-bag are far higher level than 12 years old normal children, and are elevated the level of 11 years old boy. Balancing only leg with closed eye is below the level of 10 years old boys, fist / opening palm / palm are the level of 9 years old boys. There and back running, picking the upper body is the level of 9 years old girls. Walking board is the level of 8 years old boys. Bending and opening arm with postrating on chair is the level of 7 rears old boy. Balancing one leg with opened eye is elevated to the level of f years old girls. These functions have the more balanced exercise function rather than pre-examination. In control group, they have little change by classified the bottom test, but have the exercise function on the time of pre-examination, go backward in physical strength. quickness. Third, the exercise function being learned by exercise education program on the mentally-handicapped children of the level with being able to train is appeared to maintain continuately. Softness, physical strength, quickness, eyesight training are maintained the learned exercise function, the interaction of both eye and hands, parallelism are delayed a little. Classified by the bottom test. threading pearls, transfering the wood building, throwing the bean-bag, sitting position / rolling forward / reaching, the broad jump and picking upper body up, there and bark running, picking upper body up, balancing with only leg as opened eye, bending and opening arm with postrating on chair, etc. are maintained. Fist / opening palm / palm, balancing with only leg as opened eye are delayed a little. The change of body position is elevated. Seeing these results, it is appeared to the mentally-handicapped children that the exercise education programs, which is suitable their actual condition and acomplishes in voluntary participation, have very positive effect. So, to develop the function of body exercise in mentally-handicapped children with the level of being to able to be trained, the measures must be groped so that the exercise education programs can be practiced positively, and the ,body exercise can be experienced more.