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중학교 특수학급 학생의 고유수용성 감각기능과 균형능력에 미치는 배드민턴 운동의 효과
이창준(Lee, Chang-Joon),신덕수(Shin, Doug-Soo) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.3
The purpose of this research was to examine the effect of badminton exercise on proprioception and balance in middle school special classroom students. 10 subjects were divided into control (n=5) and exercise (n=5) groups. Exercise group was given to utilizing badminton exercise program with the period and frequency of 60 minutes, 3 days a week for 8 weeks. Proprioception (joint position sense test, hopping and side hop test) and balance (static and dynamic) of all subjects were measured before and after the program participation. Consequently joint position sense test, hopping test, side hop test and static balance were significantly enhanced within exercise group after application of exercise program. In summary, when considering the above results, we conclude that badminton exercise may improve the levels of proprioception and static balance in exercise participants with intellectual disability.
태양전지 2 단계 전극형성 공정을 위한 마스크 패턴공정 및 효율에 대한 영향성 연구
이창준(Chang-Joon Lee),신동윤(Dong-Youn Shin) 대한기계학회 2012 大韓機械學會論文集B Vol.36 No.11
마스크를 이용하여 니켈 시드층의 형성 후 실버 도금을 통해 태양전지 상부전극을 형성하는 2 단계 전극형성 공정이 태양전지의 고효율화 방안으로 제안되었다. 본 연구에서는, 자외선 경화형 혹은 상변화 잉크를 고비용의 인쇄공정을 통해 마스크를 형성하는 방법을 대신하여, 코팅과 레이저의 복합공정을 통해 마스크를 형성하는 방법에 대해 제안하도록 한다. 마스크를 형성하는 물질로서 저비용의 저융점 왁스 혹은 플루오르카본 용액을 태양전지 웨이퍼 상에 코팅 후 레이저로 선택적으로 제거하여 전극패턴을 형성하였으며, 플루오르카본 용액 코팅이 왁스 코팅보다 패턴 균일도 측면에서 우수할 뿐만 아니라 통계적으로 0.16% 태양전지 효율증대를 유발한다는 점이 발견되었다. Two-step metallization processes have been proposed to achieve high-efficiency silicon solar cells, where the front-side grids are formed by silver plating after the formation of a nickel seed layer with a mask. Because the conventional mask patterning process is performed by an expensive selective printing method using either UV resist or phase change ink, however, the combination of a simple coating and laser-selective ablation processes is proposed in this study as an alternative means. As a masking material, the solar cell wafer was coated with either inexpensive wax having a low melting temperature or a fluorocarbon solution, and then, an electrode image was patterned by selectively removing the masking material using the laser. It was found that the fluorocarbon coating was not only superior to the wax coating in terms of pattern uniformity but it also increased the efficiency of the solar cell by 0.16%, as confirmed by statistical f and t tests.
강창준 ( Chang Joon Kang ),고경현 ( Kyung Hyun Koh ),김동훈 ( Dong Hoon Kim ),박상준 ( Sang Joon Park ),정재연 ( Jae Yeon Cheong ),김진홍 ( Jin Hong Kim ),조성원 ( Sung Won Cho ),이광재 ( Kwang Jae Lee ) 대한소화기기능성질환·운동학회 2008 Journal of Neurogastroenterology and Motility (JNM Vol.14 No.1
Pseudoachalasia or secondary achalasia is a rare motor abnormality mimicking primary achalasia. It has clinical, radiographic, and manometric features often indistinguishable from primary achalasia. The majority of reported cases of pseudoachlasia is associated with a neoplasm at or near the esophagogastric junction. A 62-year-old woman with inoperable pancreatic cancer presented with complaints of dysphagia, nausea and vomiting. Her endoscopic and esophageal manometric findings were compatible with achalasia. Abdominal CT scan revealed that gastroesophageal junction was compressed by a metastatic lymph node. We present a rare case of pseudoachalasia in which the primary cause of the disease was a pancreatic carcinoma.
이창준 ( Lee Chang Joon ),이준철 ( Lee Jun Cheol ),신성우 ( Shin Sung Woo ),김화중 ( Kim Wha Jung ) 한국건축시공학회 2016 한국건축시공학회지 Vol.16 No.5
본 연구에서는 압전소자의 EMI 신호변화를 이용하여 시멘트계 재료의 응결특성을 평가하였다. 시멘트 페이스트에 매립된 PZT센서의 수화시간에 따른 EMI 신호변화를 비카트침 시험과 간이단열시험을 통한 수화온도곡선과 비교하였다. 실험결과, 시멘트 페이스트가 수화함에 따라 PZT센서의 EMI 공진피크와 공진주파수의 변화가 나타났으며, 이러한 변화시점은 비카트침 시험과 간이단열시험을 통한 수화온도곡선으로부터 획득한 응결시간과 부합하는 것으로 나타났다. The evolution of electro-mechanical impedance (EMI) of the piezoelectricity (PZT) sensor was investigated to determine the setting times of cementitious materials in this study. The PZT sensor coated with non-conductive acrylic resin was embedded in cement paste before casting and the EMI signatures were continuously measured. Vicat needle test and semi-adiabatic calorimetry test were also conducted to justify the validity of EMI senssing technique in setting monitoring of cementitious materials. The results show that significant changes in EMI resonant peak magnitude and frequency during setting process were observed, and that the setting times determined by EMI sensing technique were relevant to the setting times measured by Vicat needle test and semi-adiabatic calorimetry test.
하이브리드 바퀴를 사용한 농업용 전방향 이동로봇의 설계
이창준(Chang-Joon Lee),조재훈(Jae-Hoon Cho),김용태(Yong-Tae Kim) 한국지능시스템학회 2021 한국지능시스템학회논문지 Vol.31 No.1
본 논문에서는 하이브리드 바퀴를 적용한 농업용 전방향 이동 로봇의 설계를 제안한다. 제안된 메커니즘은 특수 형태의 바퀴 구조를 가지며 노지 주행이 가능한 원통형 나사선 바퀴와 정비된 바닥면을 주행하기 위한 가변형 원형 바퀴의 융합된 구조를 가진다. 원통형 나사선 바퀴는 노지 주행이 가능하며 전방향 주행이 가능하도록 설계 하였으며, 가변형 원형 바퀴는 원통형 나사선 바퀴에 매립하여 접고 펼칠 수 있도록 설계하였다. 나사선 바퀴를 제어하기 위해서 DC 모터와 타이밍 벨트를 활용하였으며, 가변형 원형 바퀴의 구동기는 나사선바퀴 중앙에 위치해 있으며 접힘과 펼침 기능을 제어한다. 제안하는 구동 메커니즘의 성능을 평가하기 위해서 프로토 타입의 이동 로봇을 제작하였으며, 테스트 베드 에서 실험결과 노지 및 평지 주행이 가능함을 확인하였다. In this paper, we propose a design of an omnidirectional mobile robot for agriculture using hybrid wheels. The proposed mechanism has a special type of wheel structure. In addition, it has a fused structure of a cylindrical screw-wheel(CSW) capable of moving in the open field and a variable circular wheel(VCW) for moving on a flat floor surface. The CSW is designed to be able to move in the open field and in all directions. The VCW was embedded in the CSW and designed to be folded and unfolded. The CSW is controlled by a DC motor and timing belt, and the actuator of the VCW is located in the center of the CSW and controls folding and unfolding functions. In order to evaluate the performance of the proposed driving mechanism, a prototype mobile robot was manufactured, and the test results confirmed that it is possible to move in both open ground and on flat ground.
코어 트레이닝이 지적장애 학생의 균형감각기능, 유연성, 요추근기능 및 요통지수에 미치는 영향
이창준(Lee, Chang-Joon),신덕수(Shin, Doug-Soo) 한국체육과학회 2014 한국체육과학회지 Vol.23 No.2
The purpose of this research was to examine the effect of core training on equilibrium sensory function, flexibility, lumbar muscle function and visual analogue scale (VAS) in students with intellectual disability. 20 subjects were divided into control (n=10) and exercise (n=10) groups. Exercise group was given to utilizing core training with the period and frequency of 40 minutes, 3 days a week for 12 weeks. Equilibrium sensory function, flexibility, lumbar muscle function and VAS of all subjects were measured at before and after the program participation. Consequently static balance, flexibility, muscle strength, muscular endurance, and VAS were significantly enhanced within exercise group after application of exercise program. In summary, when considering the above results, we conclude that core training may improve the levels of equilibrium sensory function, flexibility, lumbar muscle function and VAS in exercise participants with intellectual disability.