• PNF and Movement
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• v.8 no.2
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• pp.1-8
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• 2010

Purpose : The purpose of this study was to investigate the effects of proprioceptive exercise (PE) using a trampoline and a balance board on a balance ability after stroke. Method : Sixteen chronic stroke patients participated. Participants were randomly assigned to the PE group or control group (8 experimental, 8 control). All of participants were in-patients at local rehabilitation centre and had been receiving a traditional rehabilitation program, five days a week. The PE group have additionally undergone for four weeks, three days a week, the PE using a trampoline and a balance board under supervision by a physical therapist but control group was not received any additional program except the traditional rehabilitation program. The position sense test used to assess a proprioceptive sense at a knee joint. The Berg Balance Scale (BBS) and the Timed Up & Go (TUG) test to measure the balance ability were carried out before and after the training. Result : After the training the error of position sense at knee joint of PE group significantly decreased compared to the control group. The PE group demonstrated a significant improvement in the scores of the BBS and TUG. Conclusion : The present study suggests that the PE program using a trampoline and balance board may become a useful tool for enhancing a balance ability in chronic stroke patients through the ennced proprioceptive position senses.

• Journal of Korean Physical Therapy Science
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• v.29 no.2
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• pp.1-13
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• 2022

Background: This research was conducted to understand balance training in trunk control, balance, and walking in stroke patients. Design: Randomized controlled trial. Methods: The subjects included 40 stroke patients, of whom 20 undertook balance training using visual information and the other 20 undertook balance training using balance boards. Using visual feedback, the balance training group used a training program within the static balanced evaluation tool, while the balance training group trained using a balance board. All subjects underwent 20 mins of neurodevelopmental treatment, and both target groups underwent 10 mins each of balance training by using either visual feedback or a balance board. The treatment period lasted a total of 4 weeks, twice a day. Trunk control before and after training was evaluated with the Trunk Impairment Scale. Balance capability was assessed by the Berg Balance Scale, Functional Reach Test, Timed Up and Go test, and Static balance measurement tool. Walking capacity was measured using gait measuring equipment, and cadence and velocity were measured. Results: Both groups showed a significant improvement in their interstitial control, balance, and gait ability after the experiments compared to before the experiments (p<0.05). The difference between the two groups was not significant. The visual feedback balance training group showed a more substantial improvement than the balance board training group. Conclusion: In this study, we found that the balance training combined with visual feedback contributes to improving trunk control, balance, and gait in patients with hemiplegia due to stroke. In addition to this, I believe that balanced training combined with visual feedback can be used as a training method when considering patients who lack interstitial control, balance, and gait ability.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.11B
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• pp.1363-1372
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• 2011

Flooding based routing protocols are usually used to disseminate information in wireless sensor networks. Those approaches, however, require message retransmissions to all nodes and induce huge collision rate and high energy consumption. In this paper, HoGoP (Hop based Gossiping Protocol) in which all nodes consider the number of hops from sink node to them, and decide own gossiping probabilities, is introduced. A node can decide its gossiping probability according to the required average reception percentage and the number of parent nodes which is counted with the difference between its hop and neighbors' ones. Therefore the decision of gossiping probability for network topology is adaptive and this approach achieves higher message reception percentage with low message retransmission than the flooding scheme. Through simulation, we compare the proposed protocol with some previous ones and evaluate its performance in terms of average reception percentage, average forwarding percentage, and forwarding efficiency. In addition, average reception percentage is analyzed according to the application requirement.

• Journal of the Korean Home Economics Association
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• v.41 no.2
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• pp.187-198
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• 2003

The purpose of this study was to explore the ideas about childrearing represented on the cyber space. The method used for this study is the content analysis and the data are articles about child rearing on the Hitel bulletin board during 1 year. It was found that then articles dealt with problems of practices in the teaching, nurturing, interfacing between home and social institutions, and disciplining. Especially these articles put great emphasis on teaching. For example, there are many articles about children's cognitive development. And there are many articles about nurturing. Especially child's emotional care. Many articles about interfacing between home and social institutions are appeared. In early childhood, many child go to nursery center. So from these results, we might conclude that many mothers gave their children emotional care. And they didn't teach their children directly. Instead they bought many educational instrument.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2017.06a
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• pp.237-240
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• 2017

최근 바둑에 대한 관심이 급증함에 따라 바둑에 관련된 연구가 많이 진행되고 있다. 바둑에 관련된 연구가 진행 되기 위해서는 많은 양의 바둑 데이터를 취득할 필요가 있다. 바둑 데이터 중 아직도 사람의 도움없이 취득하기 어려운 데이터로는 대표적으로 기보 데이터가 있다. 따라서 기보를 자동으로 저장하는 연구가 활발하게 진행 되고 있다. 기보를 자동으로 저장하는 연구 중 바둑돌이 착수될 위치를 예측하여 기보를 저장하는 시스템은 카메라의 정보를 취득하는 것으로부터 시작된다. 많은 양의 데이터를 수집하기 위해서는 일반 사용자가 사용할 수 있는 어플리케이션의 역할이 중요하다. 하지만 카메라의 정보를 취득하는 것은 어플리케이션의 환경을 구축하는데 어려움을 야기한다. 따라서 본 논문은 어플리케이션의 환경 구축 문제점인 카메라의 정보를 바둑판 최 외각 네 끝점과 비교적 간단한 방법으로 예측하는 방법을 제안한다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2017.06a
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• pp.233-236
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• 2017

본 논문에서는 바둑판을 촬영한 정지 영상에서 격자무늬의 특징을 이용하여 바둑판의 최외각 네 점을 검출하는 방법을 제시한다. 바둑판은 수평 및 수직 방향으로 각각 19 개의 선이 격자무늬를 이룬다. 영상에는 일반적으로 노이즈가 포함되어 있기 때문에 허프(Hough) 변환의 임계값(threshold)을 이용한 선 패턴 추출 방식으로는 모든 선에 대한 정보를 얻을 수 없다. 따라서, 제안하는 알고리즘은 허프(Hough) 변환을 수행한 뒤에 추출된 선들이 이루는 교차점의 정보를 이용하여 바둑판의 최외각 네 점을 예측한다. 실험 결과는 실제 바둑판의 최외각 네 점과 비교하여 예측된 최외각 네 점의 에러 값을 제시한다. 이는 제안된 알고리즘이 바둑판의 최외각 네 점을 성공적으로 검출한다는 것을 입증한다.

• Journal of the Korean Society of Marine Environment & Safety
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• v.6 no.1
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• pp.35-45
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• 2000

The slipway, which is one of stern construction, is necessary for stern trawler to let fishing implements, such as fishing net, otter board and warp, go out effectively. It may be doubtable whether there is any possibility for deckwetness to occur because the slipway is obliquely in contact with sea surface. The author discusses any possibility for deckwetness through slipway of stern trawler in wind and waves. A 350 G/T class, ocean-going stern trawler is adopted for the present study. The stem trawler is particularly assumed to drift with fishing implements hung down the slipway due to internal or external accident during fishing operation in real sea. The author considers two factors as possibility for deckwetness to occur through slipway. One is mooring effect of fishing implements hung down the slipway under wind pressure, and the other is relative ship motion in vertical direction in waves. Through the numerical calculation, the author clarifies that there is thin possibility for deckwetness to occur from above two points of view.

• Proceedings of the KIEE Conference
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• 1992.07a
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• pp.269-272
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• 1992

In this paper, an implementation approach of Fuzzy Position Controller for DC servo motor which requires the faster and more accurate dynamics is presented. The proposed Fuzzy position controller is consists of an adjustment routine obtaining optimal scale factors and a Fuzzy control routine inferencing optimal control signals, using 80286 microprocessor and DT 2801 board. Comparing to conventional PD controllers, the control performances such as reaching time, overshoot, disturbance adaptability and etc. are substantially improved.

• Journal of Institute of Control, Robotics and Systems
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• v.6 no.4
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• pp.285-294
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• 2000

This paper shows that the proposed fuzzy-sliding mode control algorithm for a SCARA robot could reduce the chattering due to sliding mode control and is robust against a change of payload and parameter uncertainties. That is, the chattering can be reduced by changing control input for compensating disturbances into a control input by fuzzy rules within a pre-determined dead zone. The experimental results show that the chattering can be reduced more effectively by the fuzzy-sliding mode control algorithm than the sliding mode control with two dead zones. It is proved experimentally that the proposed control algorithm is robust to a change of payload. The proposed control algorithm is implemented to the SCARA robot using a DSP(board) for high speed calculations.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2017.05a
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• pp.80-81
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• 2017

The study conducted a thermal conductivity test of magnesium oxide to manufacture boards using absorbent to produce board of radon gas molecules that are absorbed into the indoor air pollutants, which are currently in question, among other indoor air pollutants. Using material are the vermiculite and anthracite, in case of the vermiculite, which results in large porosity due to the expansion, in case of the anthracite, which characteristic generates pore on the matrix. As a result of the experiment, the lowest value was given to 0.6161 kcal/mh℃ which adding vermiculite 10% and anthracite 40%. However, adding vermiculite 40% and anthracite 10%, slightly higher 0.7229 kcal/mh℃, it is deemed the anthracite has more porosity than the vermiculite and, it judged that pore occurrence during the mixing process, appeared that the heat conductivity go down.