Objective : The purpose of this study was to determine the effects of ocular training on visual perception ability and eye-hand coordination of patients after a stroke.Methods : The subjects this study were ten stroke patients who have trouble with handling visual perception. The experimental group received both upper extremity function training and ocular motor training. The control group received upper extremity function training, and Developmental Test of Visual Perception-Adolescent and Adult (DTVP-A) and Visual Object Space Perception Battery (VOSP) were used to measure their visual perception, whereas Minnesota Manual Dexterity Test (MMDT) and CMS-10 were used to measure their eye-hand coordination before and after intervention.Results : The two groups both showed an increase in visual perception and eye-hand coordination after intervention, but the experiment group showed a significantly greater increase than the control group (p<.05). Differences in groups showed significantly increase with experimental group in form constancy of DTVP-A, total score of VOSP and moving part of MMDT (p<.05).Conclusion : The two groups both showed an increase in visual perception after intervention, but there was a greater improvement within the experimental group, which performed ocular training. As a result, it can be predicted that ocular motor training may be helpful in recovering and increasing the abilities of strok patients.

In this paper, we present a serious game that can prevent elderly people from brain illness using natural finger interaction and Fumanet exercise. As population of elderly people has continually grown in our society, brain illness like dementia can be naturally observed, which makes treatment cost up rapidly. Hence, we propose Leap-Motion based serious game for elderly people, which uses natural finger motions to interact with game contents. In our approach, we enhance finger motion recognition rate by adding auxiliary conditions that is superior to ordinary Leap-Motion APIs. Finally, we have also carried out user study and quantitative analysis to verify our methods.

목적 : 본 연구는 편마비 환자의 표준형 수동 휠체어 사용상 문제점을 분석하고 그 해결방안으로 한 손 추 진이 가능한 수동 휠체어(one-hand propellable manual wheelchair) 장치를 개발하고 그 효과를 알아 보는데 목적을 두었다. 연구방법 : 참여자는 광역시소재 재활병원 및 요양병원에 입원한 편마비 환자 30명을 대상으로 하였다. 연 구도구는 일반적으로 편마비 환자가 많이 사용하는 표준형 수동 휠체어와 본 연구에서 개발한 한 손 추 진이 가능한 장치가 장착된 수동 휠체어를 사용하였다. 평가도구는 휠체어 기술 검사(Wheelchair Skills Test; WST)를 도입하였으며 참여자의 주관적 의견을 평가하기 위하여 주행성, 편리성, 차이성, 수용성 에 대한 설문조사를 실시하였다. 결과 : 평가결과 편마비 환자가 발을 사용하지 않고 보조자 없이 기존의 표준형 수동 휠체어를 운전할 경 우 모든 WST 항목에서 매우 높은 실패율(96.7%)을 보임으로써 발을 사용하지 않으면 휠체어를 독립 적으로 이동할 수 없음을 실험을 통해 알 수 있었다. 개발된 한 손 추진이 가능한 수동 휠체어에 대한 평가결과 기존의 표준형 수동 휠체어를 운전한 경우보다 휠체어 조작 능력, 주행성, 편리성 등에 있어서 편마비 환자에게 매우 효과적인 것으로 판명되었을 뿐만 아니라 기존의 휠체어에 비하여 차이성이나 추 후 수용성에 있어서도 탁월한 효과를 보였음을 알 수 있었다. 결론 : 본 연구는 편마비 환자가 기존의 휠체어를 운전할 경우 발생되는 문제점을 해결하기 위한 적극적인 해결 방안으로서 이의 도입과 확산이 절실히 필요함을 시사하고 있다. 따라서 이와 관련된 연구개발과 보급의 활성화를 통하여 편마비 환자를 비롯한 한 손 사용자들에게 보다 편리하고 독립적인 이동성 참 여와 작업수행의 촉진을 이끌어 낼 것으로 예상한다.

Even though two-hands lifting/lowering activity of manual materials handling tasks are prevalent at the industrial site, many manual materials handling tasks which require the worker to perform one-hand lifting/lowering are also very common at the industrial site, forestry, farming, and daily life. The objective of this study was to compare one-hand lowering activity to lifting activity in terms of biomechanical stress for the range of lowering heights from knuckle height to 10cm above floor level with two workload 7.5kg and 15.0kg. Eight male subjects with LMM were asked to perform lifting/lowering tasks using both a one-handed (left-hand and right-hand) as well as a two-handed technique. Spinal loading was estimated through an EMG-assisted free-dynamic biomechanical model. The biomechanical stress of one-hand lowering activity was shown to be 43% lower than that of one-hand lifting activity. It was claimed that the biomechanical stress for one-hand lifting/lowering activity is almost twice (194%) of the one for two-hands lifting/lowering activity. It was also found that biomechanical stress by one-hand lowering/lifting activity with the half workload of two-hands lowering/lifting activity was greater than that of the two-hands lowering/lifting activity. Therefore, it might be a risk to consider the RWL of one-hand lowering/lifting activity to simply be a half of the RWL of two-hands lowering/lifting activity recommended by NIOSH.

This study was performed to investigate the hand size growth of Korean adolescents boys. Subjects were between 14 and 19 years (n=352). We collected the right hand size data of 19 measurements from each subject using 3D hand scanner. The total 26 hand measurements were analyzed including seven calculated measurements. Subjects were divided into three age groups (early, middle and late). Their hand size were compared. The results showed that all hand length measurements were significantly difference among age groups. Adolescent boys hands were sharply grown at age 16 years old. The hand dimensions of middle age group were compared with twenties men (n=215). There were significant differences between two groups. The middle age adolescents' hands were shorter and thicker than twenties men. Subjects were also divided by weight and height. Weight and height was closely related to hand size. The heavier and taller subjects had the thicker hand. Their fingers were longer than others. The adolescent boys and twenties men who were taller than the twenties' average height (173.4cm) were compared. Twenties men's hands were longer and thinner than that of adolescent boys. These results imply that the male adolescent hands grow short and thick in the adolescent period. Fingers continuously grow up as a long and thin shape after adolescent period.

We present a Microsoft Kinect-based hand recognition algorithm for an interactive image clipping system, which is widely used for environments such as public facilities and security environments where personal capturing devices including mobile phones are not allowed. User-friendly interface and accurate image capturing function are required for an image clipping system. We build the system by combining Microsoft Kinect, HD webcam and projector. The Kinect and webcam are used to capture the motions of users' hand and project is to display the user-selected area from the capturing material. Hand recognition is composed of three steps: (i) the region occupied by users' hand is extracted from an image, (ii) the fingertips of the extracted hand region are analyzed using k-curvature algorithm, and (iii) the height of the fingertip is estimated using the depth image from Kinect. The height of the fingertip informs whether users' finger touched the surface of the target. The region captured by the fingertip is clipped from the image and stored as the target image. The excellence of our hand recognition algorithm is proved through a user test.

목적 : 본 연구의 목적은 뇌졸중 환자의 얕은손가락굽힘근에 진동자극을 적용하는 것이 손의 기민성을 향상시키고 얕은손가락굽힘근의 개시와 종료 시간을 단축시키는데 도움이 되는지를 알아보는 것이었다. 연구방법 : 본 연구는 개별실험연구방법 중 ABA 연구 설계를 이용하였다. 총 실험회기는 24회로 기초선 과정, 중재 과정, 기초선 회기 과정으로 나누어 각 8회기씩 진행하였다. 중재기간 동안 진동자극은 환측의 얕은손가락굽힘근에 적용되었다. 상자와 블록 검사(Box and Block Test; BBT), 그리고 컵을 쥐기 및 놓기 과제를 수행하는 동안 얕은손가락굽힘근의 개시시간과 종료시간을 측정하였다. 결과 : BBT 점수는 기초선 과정에 비교하였을 때 중재기간 동안 유의하게 증가되었으며(p<.05), 과제 수행 동안 얕은손가락굽힘근의 개시시간과 종료시간은 중재 기간 동안 유의하게 단축되었다(p<.05). 이 러한 경향은 회귀 과정 동안에도 긍정적으로 유지되었다. 결론 : 이러한 결과는 진동자극이 이환된 손의 기민성을 향상시키고 물건을 쥐고 놓는 동안 손과 얕은손가락굽힘근의 활성 형태를 향상시키는데 긍정적으로 사용될 수 있다는 것을 의미한다.

This study is aimed to investigate the association between anaerobic․aerobic exercise intensity and hand steadiness. Hand steadiness is the decisive contributor to affecting the job performance just as in the rifle shooting and archery in sports and the microscope-related jobs requiring hand steadiness in industries. In anaerobic exercise condition hand steadiness is measured through hand steadiness tester having 9 different diameter holes after each subject exerts 25%, 50%, 75%, and 100% of maximum back strength. In aerobic exercise occasion it is evaluated at each time heart rate reaches 115%, 130%, and 145% of reference heart rate measured in no task condition after they do jumping jack. The results indicate that an increased intensity in both types of exercise reduces hand steadiness, but hand steadiness at 25% of maximum back strength and 115% of reference heart rate is rather greater than at no exercise. Just as the relation between cognitive stress and job performance has upside-down U form, so does the association of physical loading to hand steadiness, which means that a little exercise tends to improve hand steadiness in comparison with no exercise.

인터넷 통신의 보편화에 따라 멀티미디어 관련 콘텐츠 서비스가 이루어지고 있으며, 이러한 서비스는 교육용 학습 콘텐츠 및 시스템 분야로 확장되고 있다. 고급화된 멀티미디어 학습 시스템을 지원하기 위해 3D 그래픽스 기반의 학습 서비스 시스템이 개발되고 있지만 대부분의 시스템이 마우스와 키보드와 같은 컨트롤 기반의 콘텐츠를 가지고 있어 현실감이 떨어지는 단점이 있다. 본 논문에서는 Kinect를 이용하여 사용자 손 영역을 추출하고, 추출된 사용자 손영역에서 손 제스처를 인식하여 가상공간에서 전자교과서를 선택하고, 열고, 페이지를 넘기는 시스템을 소개한다.

This study was to use the 3D visual device and surface reaction device for 6 male middle school gymnastics players and 6 plain students and analyze the factors to execute stable handspring and provide a guideline to teach male middle school students to ex

연구목적 : 본 연구는 보조의자 및 손 보조도구를 통하여 칸나반병 아동의 미리쓰기(pre-writing)에 필요한 손기능의 향상에 미치는 영향을 알아보고자 실시되었다. 연구방법 : 연구의 대상은 만 5세의 카나반병 아동으로 8주간, 주 3회, 회당 20분의 고전적 작업치료 및 10분의 손 보조도구를 착용하여 실시하였다. 치료시간 30분 동안 아동은 보조의자에 계속 앉아 있었다. 아동의 발달력, 손기능 및 시지각 기능을 살펴보기 위해 치료 전, 치료 4주 후, 치료 8주 후로 총 3번에 걸쳐 평가하였다. 연구결과 : 한국판 덴버 발달 판별 검사(K-DDST)의 미세운동-적응 영역에서 2개월의 수준 향상을 보였다. 한국판 시지각 발달검사(K-DTVP-2)에서 일반적 시지각 지수가 증가하였다. 특히 운동감소 시지각 지수에서 뚜렷한 변화를 보였다. 시각-운동 통합 지수에서도 향상을 보여 손기능의 정확성이 증가됨을 알 수 있다. 결론 : 카나반병 아동을 대상으로 보조도구를 이용하여 작업치료 중재를 한 결과 손기능 및 시지각 능력의 향상을 보였다. 본 연구를 통하여 카나반병 아동을 대상으로 보조도구를 이용한 작업치료 중재가 기능 회복에 미치는 영향을 제시하였다. 또한 국내 작업치료분야에서는 이러한 증례가 보고된 적이 없기에, 저자들은 카나반병 아동에 대한 문헌고찰과 함께 보조도구 사용 전후 아동의 정보를 공유하고자 한다.

The objective of this study is to investigate the relationship between anaerobic・aerobic exercise intensity and hand steadiness. Based on physiological analysis the conceptual model explaining that both increased anaerobic and aerobic exercise intensity reduce hand steadiness is suggested, which is verified through the experiment with 20 subjects. Hand steadiness is the critical contributor to having an effect on the job performance just as in the rifle shooting and archery in sports, and the microscope-related job requiring hand steadiness in industries, and so forth. In anaerobic exercise experiment the hand steadiness is measured through hand steadiness tester having 9 different diameter holes after each subject exerts 25%, 50%, 75%, and 100% of maximum back strength measured by back muscle dynamometer. In aerobic exercise condition after they do jumping jack, it is evaluated at each time heart rate reaches 115%, 130%, and 145% of reference heart rate measured in no exercise. The findings are that an increased intensity in both types of exercises tend to decrease hand steadiness, but hand steadiness at 25% of maximum back strength and 115% of reference heart rate is rather higher than at no exercise. Just as the association between cognitive stress and job performance has upside-down U form, so does the relation of physical loading to hand steadiness, which means that a little exercise has a tendency to improve hand steadiness compared to one in no exercise condition .

This study was performed to investigate hygienic behavior of food workers on the awareness of hand-washing, and the microbial load of their hands. This study focused on the comparison of fast food restaurant workers and full-service restaurant workers. A questionnaire survey and microbiological analysis were carried out for thirty fast food restaurant workers and forty full-service restaurant workers. Samples for microbiological analysis were collected through the glove-juice method from the hands of the food workers, and were analyzed for the presence of aerobic plate counts, total coliforms, fecal coliforms, Escherichia coli, Staphylococcus aureus, and Salmonella spp. Microbiological analysis was done according to the Food Code of Korea. In the survey, significant differences (p < 0.05) were found between the fast food restaurant workers and full-service restaurant workers in the use of hand washing tools and method of turning off water. More full-service restaurant workers responded to wash their hands after touching face, hair, or clothes; after handling raw food materials, and more fast food restaurant workers periodically (p < 0.05). Aerobic plate counts were higher in fast food restaurant workers while total coliforms were higher in fullservice restaurant workers (p < 0.05). No remarkable difference was found between the two groups in the load of fecal coliforms, E. coli, S. aureus, and Salmonella spp. Poor hand hygiene practices were indicated by the positive results for E. coli, S. aureus, and Salmonella spp. on the hands of some food workers in both groups. The findings of this study emphasize the need for strict adherence to hand hygiene compliance among the food workers.

수공구 사용시 과도한 힘은 작업성 근골격계 질환을 일으킬 수 있는 주요 원인중 하나이다. 이와 관련하여, 수공구 파지시 인체 내부에 부과되는 근력과 외적으로 작용된 힘 간의 비율을 이해하는 것이 중요하며, 이는 근육에 부과되는 과도한 힘을 최소화 시키고, 작업에 필요한 힘의 효율성을 극대화 시키는데 필수적이라 할 수 있다. 이러한 비율과 관련하여 많은 연구가 되어 왔으나, 대부분 수리적 인체역학적 모델과 같은 간접적 추정 방법에 의거하고 있는 실정이다.

This study was conducted to evaluate the microbiological hazard on nursery school children's hands and to investigate the reduction effect of hand washing education. A total of 59 nursery school children's hands were tested. The average number of total aerobic bacteria was 3.72 ± 0.38 log CFU/hand. Five children's hands(2 male and 3 female) were positive(14.3%) for the coliform bacteria. These results showed that hand washing education are required repetitively. Among the pathogenic bacteria tested in this study, Staphylococcus aureus and Bacillus cereus were detected in 9(25.7%) and 16(45.7%) out of 35 their hands, respectively. Twelve out of sixteen B. cereus isolates(70.0%) produced enterotoxin. The results indicate that the hand hygiene of nursery school children needs to be improved. Comparing before and after hand washing in educated and non-educated group, the reduction effect of total aerobic bacteria on their hands was 0.42 and 0.60 log CFU/hand, respectively. The educated group showed 0.18 log CFU/hand higher reduction effect than non-educated group but microorganism did not eliminate perfectly. From the results, using a hand sanitizer after washing with soap and the continuous hand washing education are required to control the contaminated bacteria on nursery school children's hands.

In this study, the representative hand shapes for the adult Koreans were analyzed by factor analysis and cluster analyses. The analyses were conducted on the anthropometric data of 58 hand dimensions from 325 subjects having nonhomogeneous demographics. Maximum hand circumference, first phalanx length of index finger, and ratio between the two measures were the independent variables for the cluster analyses. The results of the study showed that Korean hand shapes can be divided into 2 clusters irrespective of their size for each of the male and female group. There were slight differences in component ratio of hand shapes with respect to the occupation and the age, but their differences were not statistically significant. The representative Korean hand shapes and their anthrpometric dimensions could be used to design and establish proper sizing system for various hand operating devices.

This study was performed to determine the transfer rates of each foodborne pathogen from pork meat packaging during the processing. We analyzed the transfer rate of Listeria monocytogenes from contaminated pork meat to worker's hands (wearing polyethylene gloves, PEG; cotton gloves, CG; and bare hands), cutting boards and knives, and vice versa. Transfer rate of CG 100.00% was higher than that of bare hands 2.513% and PEG 1.511%. In particular, when wearing CG, the transfer rate from the CG to bare hands with CG was 0.08%. Also, the range of transfer rates from contaminated pork meat to cutting board and knife was 0.352-3.791%. In contrast, transfer rates from the workers’ hands (with PEG/CG and bare hands) to cutting board, knife, and pork meat ranged from 0.001 to 0.141%. There was a lower transfer rate from workers’ hands than from pork meat. These findings indicate that use of PEG could effectively reduce or prevent the cross-contamination compared to CG and provide important information concerning the consecutive transfer of L. monocytogenes during food processing.

Inadequate food handling and poor hand hygiene play a major role in the occurrence of foodborne diseases. The objective of this study was to find out if the level of microbial contamination on the hands of food preparers varies by time during their working period. This study focused on the contamination of aerobic plate count,total and fecal coliforms, Escherichia coli, Staphylococcus aureus, and Salmonella spp. Sampling from left hand and right hand of twenty food preparers was done with glove-juice method at every two hours during their work. Microbiological testing was conducted according to the Food Code of Korea. The microbiological load on the hands was changed over time. Samples taken from their hands before work and at 8 hours showed higher levels of bacteria than those taken at 2, 4, and 6 hours during work and/or after work (p < 0.05). The contamination levels of microorganisms were consistently higher in right hand than in left hand. Poor hand hygiene practices were indicated by the positive results for total and fecal coliforms, E. coli, S. aureus, and Salmonella spp. on the hands of some food preparers. This study indicates food preparers' hands can be a vehicle of pathogen during their work. The results of this study emphasize the importance of hand hygiene education and training targeting the food preparers.

목적 : 본 연구는 만성 뇌졸중 환자들을 대상으로 4주간의 거울치료가 운동 기능과 손 기능 회복에 미치는 영향을 검증하기 위하여 진행되었다. 연구 방법 : 경기도 소재 OO재활병원에 입원 중인 만성 뇌졸중 환자 총 14명을 대상으로 2010년 1월부터 동년 2월 28일까지 무작위로 실험군(6명)과 대조군(8명)을 선정하여 실험진행 하였다. 거울치료 실험군과 대조군 모두 주 5 회, 회기당 30분씩 손 운동 프로그램을 적용하였으며, 실험군은 거울을 통한 시각적 피드백이 제공된 반면, 대조군은 시각적 피드백이 제공되지 않았다. 대상자의 실험 전-후 기능회복 정도는 Brunnstrom 운동회복 단계 (Brunnstrom recovery stages), 뇌졸중 상지기능검사(Manual Function Test; MFT) 점수를 활용하였다. 결과 : 4주간의 거울치료 후 실험군의 MFT 점수 비교에서 실험군의 상지 앞 올리기, 쥐기, 입방체 옮기기 항목에서 유의한 차이를 보였다. 대조군의 경우 집기 항목에서 유의한 차이를 보였다. 결론 : 만성 뇌졸중 환자를 대상으로 거울치료를 적용한 결과 실험군에서 대조군보다 더 많은 영역에서 유의한 손기능 회복을 보였다. 본 연구를 통하여 만성 뇌졸중 환자를 대상으로한 거울치료 프로그램의 손 기능 회복에 미치는 영향을 제시하였으며, 포괄적 재활치료의 효과를 배제한 추후 연구가 이어져야 할 것이다.

목적 : 본 연구는 뇌성마비 아동에게 의도적인 다감각환경(스노즐렌) 프로그램을 적용하여 아동의 눈-손 협응 능력에 미치는 영향을 알아보고자 하였다. 연구 방법 : 세 명의 뇌성마비 아동을 대상으로 12주간 의도적인 스노즐렌 프로그램을 적용하였다. 중재 프로그램의 효과를 검증하기 위해 사용한 평가도구는 젭슨 손 기능 평가로 7가지 하위검사의 수행시간을 우세손과 비우세손을 구별하여 뇌성마비 아동의 눈-손 협응 능력의 변화를 측정하였다. 결과 : 의도적인 스노즐렌 프로그램 실시 후 3명의 뇌성마비 아동의 젭슨 손 기능 평가 항목의 수행시간이 모두 23.4%이상 감소하였고, 작은 물건집기를 제외한 모든 평가 항목에서 스노즐렌 중재 후에 통계적으로 유의한 차이를 보인 우세손 뿐만 아니라 비우세손도 중재 후에 카드뒤집기, 작은 물건 집기와 먹기 흉내내기, 장기말 쌓기 항목에서 유의한 차이를 보였다(p<.05). 결론 : 본 연구의 결과를 통해 의도적인 다감각환경 프로그램이 뇌성마비 아동의 눈-손 협응 능력 향상에 긍정적인 효과가 있음이 증명되었다. 이와 같은 연구를 토대로 국내에서도 다감각환경(스노즐렌) 프로그램의 효과를 검증 하는 보다 많은 연구가 이어지길 기대한다.