The Effect of a Task-oriented Upper Arm Exercise on Stable and Unstable Surfaces on Dynamic Balance and Hand Function in Patient with Cerebral Palsy

한용구,윤창교 대한물리치료학회 2017 대한물리치료학회지 Vol.29 No.2

Purpose: The purpose of this study was to investigate the effects of a task-oriented upper arm exercise performed in a sitting position on either an unstable support surface or a stable support surface for children with cerebral palsy. Methods: We prospectively evaluated 18 children with cerebral palsy. Eight subjects were randomly assigned to each of the stable and unstable support surface groups. We performed the upper arm exercise three times a week for 6 weeks. To confirm the effects of the intervention, the berg balance scale test, modified functional reaching test (MFRT), timed up and go test (TUG), and Jebsen-Taylor hand function test were conducted before and after the study. Results: Significant differences were observed in MFRT and TUG between the experimental and control groups (p<0.05). In the Jebsen-Taylor hand function test, there were significant differences between the groups for the items picking up small objects, stacking checkers, lifting large light objects, and lifting large heavy objects (p<0.05), but not for writing and stimulation of feeding. Significant differences were observed between the groups in items of card turning, lifting large light objects, and lifting heavy objects. Conclusion: The purpose of this study was to evaluate the effectiveness of a task-oriented upper extremity exercise program for dynamic balance and hand function performed in a sitting position with either stable or unstable support by cerebral palsy patients. There were improvements in the two groups, but performing the exercise while sitting on an unstable support surface had a greater effect on dynamic balance and hand function than exercise while sitting on a stable supporting surface. The results of this study can be used to improve the daily lives of cerebral palsy patients.

Insect herbivores associated with the introduced weed Bidens frondosa L. (Asteraceae) in Korea, and their potential role as augmentative biological control agents

한용구,조영호,김영진,임헌명,권오석,남상호 한국곤충학회 2009 Entomological Research Vol.39 No.6

The annual herb Bidens frondosa L., native to North America, is an invasive weed. Currently no information is available on the insect herbivores associated with this weed in Korea. A survey was carried out at two-weekly intervals from May to October 2008 at two sites, and the incidence and abundance of various insect herbivores studied. A total nine species of insects was recorded and among them the defoliating caterpillar Hadjina chinensis (Wallengren) (Lepidoptera) was the only species known to have host plants restricted to genus Bidens. Further host specificity studies are required to evaluate the potential of this insect as a candidate for augmentative biological control agent for B. frondosa in Korea. All other insect species are either polyphagous or known crop pests.

과제 지향적 트레드밀 훈련이 뇌졸중 환자의 보행 능력에 미치는 영향: 체계적 고찰 및 메타분석

한용구,김명권 대한물리의학회 2024 대한물리의학회지 Vol.19 No.1

PURPOSE: This study was a systematic review and meta-analysis of the literature comparing the differences between task-oriented treadmill training and general treadmill training for stroke patients. METHODS: Literature published in the Cumulated Index to Nursing and Allied Health Literature (CINAHL), Embase, Physiotherapy Evidence Database (PEDro), and PubMed was reviewed. A total of 1,163 studies were initially retrieved, of which eight articles were included in the final review. A quality assessment of the included studies was conducted using the Risk of Bias (RoB) 2.0 tool, and Duval and Tweedie’s trim and fill method was used to evaluate publication bias. Data analysis was performed using R studio 4.2.1. RESULTS: According to the quality assessment using RoB 2.0, three articles were evaluated as low risk, two as of some concern, and three as high risk. The overall effect size of task-oriented tradmill training was .35. Regarding gait function, the values were .76, .25, and .40, respectively, for gait endurance, gait speed, and gait pattern. According to Duval and Tweedie’s trim and fill method, no publication bias was observed. CONCLUSION: Study findings indicate that task-oriented treadmill training is the most effective intervention for improving gait endurance in patients with stroke. Therefore, applying this intervention to patients with stroke in the community is recommended.

How to utilize vegetation survey using drone image and image analysis software

한용구,정세훈,권오석 한국생태학회 2017 Journal of Ecology and Environment Vol.41 No.4

This study tried to analyze error range and resolution of drone images using a rotary wing by comparing them with field measurement results and to analyze stands patterns in actual vegetation map preparation by comparing drone images with aerial images provided by National Geographic Information Institute of Korea. A total of 11 ground control points (GCPs) were selected in the area, and coordinates of the points were identified. In the analysis of aerial images taken by a drone, error per pixel was analyzed to be 0.284 cm. Also, digital elevation model (DEM), digital surface model (DSM), and orthomosaic image were abstracted. When drone images were comparatively analyzed with coordinates of ground control points (GCPs), root mean square error (RMSE) was analyzed as 2.36, 1.37, and 5.15 m in the direction of X, Y, and Z. Because of this error, there were some differences in locations between images edited after field measurement and images edited without field measurement. Also, drone images taken in the stream and the forest and 51 and 25 cm resolution aerial images provided by the National Geographic Information Institute of Korea were compared to identify stands patterns. To have a standard to classify polygons according to each aerial image, image analysis software (eCognition) was used. As a result, it was analyzed that drone images made more precise polygons than 51 and 25 cm resolution images provided by the National Geographic Information Institute of Korea. Therefore, if we utilize drones appropriately according to characteristics of subject, we can have advantages in vegetation change survey and general monitoring survey as it can acquire detailed information and can take images continuously.

Possibility of applying unmanned aerial vehicle (UAV) and mapping software for the monitoring of waterbirds and their habitats

한용구,유승화,권오석 한국생태학회 2017 Journal of Ecology and Environment Vol.41 No.5

Background: Conventional bird observation methods are line survey or point count method by bare eyes or through binoculars or telescopes. But in this study, the possibility of monitoring waterbirds using drones beyond the conventional research methods was explored. It also describes the direction of producing and accumulating images of waterbird habitats as a method to efficiently determine changes in waterbird habitats. Results: From the study, it was concluded that waterbird monitoring using drones was a new monitoring technique which could be applied to the field and 26 kinds of waterbirds were observed. In the case of a drone with a single lens, it was difficult to identify objects because the size of the subject was too small at a certain altitude. In this case, zoom lens can be an alternative. It has also been verified that image analysis software can be used to accumulate images of waterbird habitats. Conclusions: If various kinds of advanced drones and cameras are used, it would be possible to monitor larger areas including the areas that are difficult for human access and to observe more waterbirds and wider habitats.

A study of the spatio-temporal distribution changes of the Korean Hawk Moth (Lepidoptera: Sphingidae)

한용구,조영호,권오석,강영국,박영준,김영진,최민주,남상호 한국생태학회 2015 Journal of Ecology and Environment Vol.38 No.1

This study was conducted in an effort to identify the fluctuation of species according to space and time by collecting information on samples of Korean Sphingid moths housed in Korea. The number of Sphingidae moth species housed in Korea was found to be 53. As 48 species and 47 species were found in Gyeongsangnam-do and Gangwon-do, respectively, relatively diverse species were considered to be distributed in these areas. Comparatively, in Jeollabuk-do only 36 species were found, whereas in Chungcheongbuk-do and Jeju Island 39 species were found. The number of individual Sphingid moths surveyed in Korea was 21,414. With regard to the number of individuals per species, Ampelophaga rubiginosa was highest, at 2,483, followed by Theretra japonica (1,716), Callambulyx tatarinovii (1,457), Acosmeryx naga (1,340), Rhagastis mongoliana (1,191), Marumba sperchius (1,083), and Dolbina tancrei (1,072). By region, the largest number of individuals was surveyed in Gyeongsangnam-do (4,595), followed in order by Gangwon-do (3,648 individuals), Gyeonggi-do (3,011), Jeollanam-do (2,454), and Jeju Island (2,382). Over time, the highest numbers—in this case 9,498 individuals in 52 species—were identified after 2000. In the 1990s, there were 6,027 of 49 species identified; in 1980s, 4,332 individuals of 49 species were identified; and, in the 1970s, 937 individuals of 45 species were identified. It was confirmed that more species and individuals were identified as time passed. The appearance of Sphingid moths by month was found to be as relatively diverse, as they appeared from February to November. Overall, southern species, including M. saishiuana, Cephonodes hylas, Acosmeryx castanea, T. nessus, and T. clotho, which mainly inhabit Jeju Island and the southern part of Korea, have increased over time from the past to the present. Species inhabiting the middle or northern parts of the Korean Peninsula or the entire country of Korea, including Sphingulus mus, Ambulyx schauffelbergeri, and Mimas christophi, show decreases over time.

A study of bioindicator selection for long-term ecological monitoring

한용구,권오석,조영호 한국생태학회 2015 Journal of Ecology and Environment Vol.38 No.1

It is very useful and important to see the status and change of necessary parts in a short period through selecting and observing the bioindicator continually to forecast and prepare the future. Especially, living things are so closely related to the environment that the indicator between the environment and living things shows close interrelationship. Also, the indicator related to environment provides information about representative or decisive environmental phenomenon and is used to simplify complicated facts. Considering wide range of background and application including various indica¬tors such as the change-, destruction-, pollution-, and restoration of habitats, climate change, and species diversity, the closest category includes “environmental indicator,” “ecological indicator,” and “biodiversity indicator.” The selection and use of bioindicator is complicated and difficult. The necessary conditions for the indicator selection are flexible and greatly depend on the goals of investigation such as the indicator for biological diversity investigation of specific area, the indicator for habitat destruction, the indicator for climate change, and the indicator for polluted area. It should meet many various conditions to select a good indicator. In this study, eleven selection standards are established based on domestic and overseas studies on bioindicator selection: species with clear classification and ecology, species distributed in geographically widespread area, species that show clear habitat characteristics, species that can provide early warning for a change, species that are easy and economically benefited for the investigation, species that have many independent individual groups and that is not greatly affected by the size of individual groups, species that is thought to represent the response of other species, species that represent the ecology change caused by the pressure of human influence, species for which researches on climate change have been done, species that is easy to observe, appears for a long time and forms a group with many individuals, and species that are important socially, economically, and culturally.

에탄올에 의한 산화적 손상에서 녹차의 보호 효과

한용구 Han Yong Gu 한국식품과학회 1997 국제녹차심포지엄 Vol.1997 No.1

동시발생 빈발 부분그래프를 이용한 그래프 분류

한용구(Yongkoo Han),박기성(Kisung Park),이영구(Young-Koo Lee) 한국정보과학회 2011 정보과학회 컴퓨팅의 실제 논문지 Vol.17 No.11

빈발 부분그래프들은 그래프 분류를 위한 특징으로 널리 사용되고 있다. 생성된 많은 수의 빈발 부분그래프들 중에서 분류에 유용한 빈발 부분그래프들의 선택은 그래프 분류 성능에 매우 중요하다. 그런데 기존의 특징 선택 방법들은 개별 빈발 부분그래프들의 변별력만을 고려하여 분류 성능이 떨어지는 문제가 있다. 본 논문에서는 빈 발 부분그래프의 동시 발생을 모델 기반 탐색 트리에 적용한 그래프 분류 기법을 제안하고 효율적인 알고리즘을 제시한다. 제안하는 기법은 마이닝 된 빈발 부분그래프들로 구성된 특징 집합들 중에 빈발 부분그래프들의 개별적인 변별력뿐만 아니라 동시 발생 변별력을 함께 고려하여 분류에 더 유용한 특징들을 선택한다. 실험을 통하여 제안하는 기법이 기존의 개별 특징 선택 기법보다 더 높은 그래프 분류 성능을 갖는 것을 보인다. Frequent subgraphs are widely used as feature vectors in graph classification. It is very important for a graph classification performance to select useful frequent subgraphs from many mined frequent subgraphs. The existing feature selection studies have a shortcoming that is a classification performance degradation from the lack of discrimination power among individual patterns. In this paper we propose a model based search tree using co-occurrence of frequent subgraphs and suggest an efficient algorithm. The proposed approach selects more discriminative frequent features considering both discriminative individual and discriminative co-occurrent frequent subgraphs. In experiment we show that our proposed technique can have a higher graph classification performance compared to existing approach.

스마트기기를 활용한 영상분석기반 낙과 계수 시스템

한용구(Yonggu Han),최홍철(Hongchul Choi),김기범(Kibeom Kim),유성준(Seong Joon Yoo),한동일(Dongil Han) 대한전자공학회 2016 대한전자공학회 학술대회 Vol.2016 No.6

Currently, the damage assessor measures natural disaster for Agricultural disaster insurance upon Korean Rural Economic Institute. But it is underhanded fairness and slow. Using the acceleration sensor and camera on smart appliance, detect fallen fruits and extract the area of region of interest.