• The Journal of Korean Academy of Sensory Integration
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• v.21 no.2
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• pp.12-23
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• 2023

Objective : The purpose of this study was to investigate the effect of sensory integration therapy and home program intervention on the visual attention of children with Down syndrome. Methods : This study used a single subject design for one child with Down syndrome, Sensory integrated treatment intervention was conducted once a week for 16 weeks, and home programs were conducted four times a week for 16 weeks. Changes in visual attention were measured after intervention in the target child. Results : After the intervention, the average values of object gaze, object horizontal pursuit, and object vertical pursuit time increased compared with the baseline period. In object gaze, object horizontal pursuit, and object vertical pursuit, a section higher than the ±2 standard deviation of the baseline period was observed during the intervention period. Conclusion : This study confirmed that the combination of sensory integrated therapy and home program intervention improved visual attention and visual perception in children with Down syndrome, and it is meaningful that it presented an effective intervention method.

• Vending industry
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• v.11 no.2
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• pp.86-87
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• 2012

자판기로 유통 될 수 있는 품목, 반대로 유통되지 못하는 품목. 그 구분점은 해당 내용물이 위해성이 얼마나 큰가에 달려 있다. 나라마다 편차는 있지만 공공성과 청소년 보호에 문제성이 있는 아이템들은 유통시키기 힘든 게 일반적이다. '그런데 마리화나자판기가 합법적으로 유통된다?' 이 불가능해 보이는 일이 실제 미국에서 일어났다. 마리화나의 유통자체가 불법인 우리나라로 보면 아연실색할 일. "쯧쯧~ 말세야 말세~" 라며 비난받을 사안임에 분명해 보인다. 하지만 '실용'의 시각에서 내막을 보면 얘기가 틀려 진다. 이 자판기는 암환자처럼 통증에 시달리는 사람들을 위한 의료용이다. 일반인은 사용하지 못하도록 차단이 된다. 고통에 시달리는 환자들에게 진정으로 고마운 자판기가 아닐 수 없다. 이처럼 '실용'과'편익'의 시각에서 자판기 존재 가치를 보는 게 중요하다. 일부 부작용? 인간다운 삶을 위한 긍정성에 비한다면 그다지 중요치 않는 사안이 아닐까? 마리화나 자판기는 그래서 색안경만을 끼고 봐서는 안 될 아이템이다.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10b
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• pp.664-666
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• 2004

본 논문에서는 영상의 누적분포함수(CDF: Cumulative Density Function)를 이용한 콘트라스트 향상 기법을 제안하였다 제안된 알고리즘은 처리된 영상에 영향물 주지 않으면서 최대 콘트라스트를 얻을 수 있었다. 하드웨어의 복잡성을 감소하기 위하여 누적분포함수의 샘플값을 이용한 선형화 방법을 이용하였다. 제안한 방식의 알고리즘 검증을 위하여 C를 이용하였으며, 처리 결과와 원 영상의 화질 평가를 위하여 시각적 검증과 히스토그램 편차를 도입하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2002.04a
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• pp.679-681
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• 2002

본 논문에서는 화질 향상을 위한 콘트라스트 조정 기법을 제안한다. 제안한 방식은 기존의 알고리즘을 단순화하여서 실시간 처리가 가능하며 콘트라스트의 범위를 조정하는 가중치를 두었다. 연산을 함에 있어 기준이 되는 값을 선언하여 콘트라스트의 효율적인 조정과 오차율을 줄였다. 제안한 방식에 의한 처리 결과와 원 영상의 화질 평가를 위해 시각적 검증과 히스토그램의 표준 편차를 도입 하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2003.05a
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• pp.67-72
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• 2003

중국이 IT산업의 도약에 따른 채비가 한창이다. IT업계에서는 중국이 양적인 팽창뿐 아니라 질적인 면에서도 IT강국으로 불릴 만한 수준으로 올라 설 수 있을 것이라는게 대체적인 시각이다. 중국은 2001년부터 시작된 "10차 5개년 계획"을 통해 첨단산업 육성정책과 IT산업 발전지원정책들을 함께 실시해오고 있다. 거기에 발맞춰 경제편차가 심한 동서부의 균형을 맞추기 위한 "서부 대 개발 계획"에 따른 서부지역의, 특히 중경의 IT산업 발전 현황 및 정책을 살펴봄으로서 우리가 나아가야 할 방향을 알아본다.

• Proceedings of the Korean Institute of Resources Recycling Conference
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• 2003.10b
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• pp.59-67
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• 2003

중국이 IT산업의 도약에 따른 채비가 한창이다. IT업계에서는 중국이 양적인 팽창뿐 아니라 질적인 면에서도 IT강국으로 불릴 만한 수준으로 올라 설 수 있을 것이라는게 대체적인 시각이다. 중국은 2001년부터 시작된 ‘10차 5개년 계획’을 통해 첨단산업 육성정책과 IT산업 발전지원정책들을 함께 실시해오고 있다. 거기에 발맞춰 경제편차가 심한 동서부의 균형을 맞추기 위한 ‘서부 대개발 계획’에 따른 서부지역의, 특히 중경의 IT산업 발전 현황 및 정책을 살펴봄으로서 우리가 나아가야 할 방향을 알아본다.

• Clean Technology
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• v.17 no.2
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• pp.103-109
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• 2011

The process optimization was carried out to improve the throwing power (TP) and the thickness uniformity of the electroless copper (Cu) plating, which plays a seed layer for the subsequent electroplating. The DOE (design of experiment) was employed to screen key factors out of all available operation parameters to influence the TP and thickness uniformity the most. It turned out that higher Cu ion concentration and lower plating temperature are advantageous to accomplish uniform via filling and they are accounted for based on the surface reactivity. To visualize what occurred experimentally and evaluate the phenomena qualitatively, the kinetic Monte Carlo (MC) simulation was introduced. The combination of neatly designed experiments by DOE and supporting theoretical simulation is believed to be inspiring in solving similar kinds of problems in the relevant field.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.34 no.12A
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• pp.971-981
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• 2009

The coordination of distributed entities and events requires time synchronization. Precision time synchronization enables a variety of extensions of applications and provides much accurate information. The IEEE 1588 precision time protocol (PTP) provides a standard method to synchronize devices in a network. This paper deals with the design and implementation of a PTP gateway to extend IEEE 1588 to Zigbee networks. The PTP gateway can not only extend IEEE 1588 to Zigbee networks but also share the same time reference using IEEE 1588 between two or more Zigbee networks. This paper also presents experiments and performance evaluation of time synchronization using the PTP gateway. Our result established a method for nodes in a network to maintain their clocks to within a 300 nanosecond offset from the reference clock of a master node via Ethernet.

• Journal of Navigation and Port Research
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• v.47 no.1
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• pp.10-17
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• 2023

A series of studies on the development of autonomous surface ships have been promoted in domestic and foreign countries. One of the main technologies for the development of autonomous ships is path-following control, which is closely related to securing the safety of ships at sea. In this regard, the path-following performance of an autonomous ship should be first evaluated at the design stage. The main aim of this study was to develop a visual and quantitative evaluation method for the path-following control performance of an autonomous ship at the design stage. This evaluation technique was developed using a computational fluid dynamics (CFD)-based path-following control model together with a line-of-sight (LOS) guidance algorithm. CFD software was utilized to visualize waves around the ship, performing path-following control for visual evaluation. In addition, a quantitative evaluation was carried out using the difference between the desired and estimated yaw angles, as well as the distance difference between the planned and estimated trajectories. The results demonstrated that the ship experienced large deviations from the planned path near the waypoints while changing its course. It was also found that the fluid phenomena around the ship could be easily identified by visualizing the flow generated by the ship. It is expected that the evaluation method proposed in this study will contribute to the visual and quantitative evaluation of the path-following performance of autonomous ships at the design stage.

• The Journal of the Korea institute of electronic communication sciences
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• v.9 no.9
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• pp.1043-1049
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• 2014

In this paper, we design and implement a digital LCD stopwatch function of the remote control. The central controller and LCD stopwatch is implemented based on the clock signal of the crystal oscillator of 8MHz by using ATmega8 processor in the AVR representative series of ATMEL, Communication module basic, ZBS-using the ISM 2.4GHz frequency band at 100. Stopwatch of remote control that has been proposed, it is possible to solve the three problems. First, it is possible to solve the sight deviation between broadcast camera and panelists glance to large LCD stopwatch monitors. Second, it is possible to avoid the trouble of broadcasting cameras cross replacement, Third, it is possible to minimize the inconvenient of the viewer corresponding to the operation of the horizontal movement of the broadcast camera.