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송창호,최진우,Song, Chang-Ho,Choi, Jin-Woo 대한영상치의학회 2010 Imaging Science in Dentistry Vol.40 No.4
A 12-year-old female was referred from a dental clinic due to a radiolucent area under the lower right first and second premolars. The lesion was diagnosed as a simple bone cyst radiographically. However, she complained lasting pain during 10 month follow up. Therefore curettage was performed and it defined as an osteoid osteoma on the histopathologic examination. As the lesion recurred, one year later, enucleation was performed. We report this case to help the diagnosis of osteoid osteoma in mandible.
송창호,배하석,이승원,Song, Chang-Ho,Bae, Ha-Suk,Lee, Seung-Won 대한물리치료학회 2006 대한물리치료학회지 Vol.18 No.2
Purpose: The purpose of this study was to evaluate the effects of dry-hydrotherapy to release pain in patient with low back pain. Methods: The subjects of the study were fifty patient with low back pain in orthopedic clinic. Fifty patients who had low back pain were randomly divided into 2 groups, 1) dry-hydrotherapy group 2) control group. Visual analog scale(VAS) and Oswestry low back pain disability questionnaire were measured before and after treatment. The treatment plan Was as follows; 15 min. exercise per day and 5 days per week for 2 weeks. Results: 1. Before dry-hydrotherapy, there was no significant difference in VAS score and Oswestry low back pain disability questionnaire score between two groups. 2. The VAS score was significantly decreased in both groups after 2-week dry-hydrotherapy and the decrease in the AS score in dry-hydrotherapy group was significantly lower than in control group. 3. The Oswestry low back pain disability questionnaire score was significantly decreased in both groups after 2-week dry-hydrotherapy and the decrease in Oswestry low back pain disability questionnaire score dry-hydrotherapy group was significantly lower than in control group. Conclusion: In conclusion, the dry-hydrotherapy was effective to alleviate pain in patients with low back pain.
송창호,이완희,Song, Chang-Ho,Lee, Wan-Hee 대한물리치료과학회 2003 대한물리치료과학회지 Vol.10 No.1
The purpose of this study is to provide guideline of muscle strengthening exercise for preparing ambulation by presenting suitable ratio of muscle power of agonist & antagonist, and that of concentric & eccentric contraction on behalf of amputee's normal ambulation training and it's strenthening as well. 7 Subjects who have femur amputee for experimental group were able to ambulate naturally without inconvenience and 20 adult subjects of comparison group for comparison were considered to be free from disturbance of ambulation. The method of study was to measure the muscle power of hip pint, was to figure out the ratio of agonist & antagonist, concentric contraction & eccentric contraction, and was to find out mean and standard deviation of each measurement. Every numerical value of comparison was tested by Mann-whitney and comparison group's comparison between left & right value was done with t-test. Results are as followings : 1) Extension force was stronger than flexor force and had no remarkable difference(p<0.05) 2) For normal adults, adduction farce was stronger than abduction force and for amputees, abduction force was stronger while adduction force was the same as the normal without showing remarkable difference(p<0.05) According the result above, I make an assumption that maintaining a proper ratio of muscle power on strengthening exercise for amputee's ambulation training & rehabilitation and finally bring out an improvement of transfer and ambulation.
암모니아 분위기에서 열처리된 GaOOH와 ZnO 혼합분말의 구조적·광학적 성질
송창호,신동휘,변창섭,김선태,Song, Changho,Shin, Dongwhee,Byun, Changsob,Kim, Seontai 한국재료학회 2012 한국재료학회지 Vol.22 No.11
The purpose of this study is to investigate the crystalline structure and optical properties of (GaZn)(NO) powders prepared by solid-state reaction between GaOOH and ZnO mixture under $NH_3$ gas flow. While ammoniation of the GaOOH and ZnO mixture successfully produces the single phase of (GaZn)(NO) solid solution within a GaOOH rich composition of under 50 mol% of ZnO content, this process also produces a powder with coexisting (GaZn)(NO) and ZnO in a ZnO rich composition over 50 mol%. The GaOOH in the starting material was phase-transformed to ${\alpha}$-, ${\beta}-Ga_2O_3$ in the $NH_3$ environment; it was then reacted with ZnO to produce $ZnGa_2O_4$. Finally, the exchange reaction between nitrogen and oxygen atoms at the $ZnGa_2O_4$ powder surface forms a (GaZn)(NO) solid solution. Photoluminescence spectra from the (GaZn)(NO) solid solution consisted of oxygen-related red-emission bands and yellow-, green- and blue-emission bands from the Zn acceptor energy levels in the energy bandgap of the (GaZn)(NO) solid solutions.
GaOOH로부터 GaN 분말의 합성에 미치는 B<sub>2</sub>O<sub>3</sub>의 첨가효과
송창호,신동휘,변창섭,김선태,Song, Changho,Shin, Dongwhee,Byun, Changsob,Kim, Seontai 한국재료학회 2013 한국재료학회지 Vol.23 No.2
In this study, GaN powders were synthesized from gallium oxide-hydroxide (GaOOH) through an ammonification process in an $NH_3$ flow with the variation of $B_2O_3$ additives within a temperature range of $300-1050^{\circ}C$. The additive effect of $B_2O_3$ on the hexagonal phase GaN powder synthesis route was examined by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Fourier transformation infrared transmission (FTIR) spectroscopy. With increasing the mol% of $B_2O_3$ additive in the GaOOH precursor powder, the transition temperature and the activation energy for GaN powder formation increased while the GaN synthesis limit-time ($t_c$) shortened. The XPS results showed that Boron compounds of $B_2O_3$ and BN coexisted in the synthesized GaN powders. From the FTIR spectra, we were able to confirm that the GaN powder consisted of an amorphous or cubic phase $B_2O_3$ due to bond formation between B and O and the amorphous phase BN due to B-N bonds. The GaN powder synthesized from GaOOH and $B_2O_3$ mixed powder by an ammonification route through ${\beta}-Ga_2O_3$ intermediate state. During the ammonification process, boron compounds of $B_2O_3$ and BN coated ${\beta}-Ga_2O_3$ and GaN particles limited further nitridation processes.
지형학적 특성과 물리 기반 모델을 이용한 토석류 발생원 예측 기법 개발
송창호(Song, Chang-Ho),이지성(Lee, Ji-Sung),김윤태(Kim, Yun-Tae) 한국방재학회 2021 한국방재학회논문집 Vol.21 No.2
토석류는 강우로 인해 토사와 물이 섞여 산지 아래의 유하부까지 흘러내리는 현상으로 많은 인명과 재산피해를 유발한다. 우리나라에서 발생된 대부분의 토석류는 집중강우 시 얕은 사면파괴가 발생된 지점에서 계곡부를 따라 토석류로 전이되었다. 따라서 토석류 위험에 대응하기 위해서는 우선적으로 토석류 발생 위치를 정확히 식별해야 한다. 본 연구에서는 2011년에 많은 피해가 발생했던 서울 우면산을 대상으로 지형학적 특성과 물리 기반 모델을 결합하여 토석류가 발생할 수 있는 위치를 예측하는 방법을 제안하였다. 우선 국내⋅외 토석류 발생 위치의 지형학적 특성을 기반으로 연구대상 지역의 지형학적 특성을 구축하였다. 그리고 물리 기반 모델과 당시의 누적강우량 자료를 활용하여 안전율 지도를 제작하였다. 최종적으로 토석류 지형학적 특성과 안전율이 1.2 이하인 곳이 중첩되는 셀을 추출함으로서 토석류 발생원 예측 기법을 개발하였다. 정량지수분석을 통해 검증을 수행한 결과 본 연구에서 제안한 토석류 발생원 예측 기법의 순 성공지수가 가장 높은 것으로 나타났다. 이와 같은 연구를 통해 토석류의 발생 위치를 보다 정확히 예측할 수 있을 것으로 기대된다. A debris flow is a phenomenon in which sediment matter and water become mixed and flow down to a deposition area, thereby causing significant damage to people and property. In Korea, majority of the past debris flows initiated in the form of shallow landslides during rainfall. To address the hazards associated with debris flows, it is necessary to establish a method for predicting the location of the debris flow initiation. In this study, we propose a method for predicting the source of a debris flow by incorporating geomorphological characteristics and designing a physically-based model. The geomorphological characteristics associated with the initiation area of the debris flow were determined by analyzing previous literature. The physically-based model was developed by incorporating landslide inventory data, rainfall data, and geotechnical characteristics, and the map of safety factor less than 1.2 was thereby established. Furthermore, the region prone to the occurrence of debris flows was identified by the superposition of each unstable pixel obtained from the geomorphological characteristics and the physically-based model. The proposed method was validated through quantitative index analysis. The obtained results indicate that compared to other methods, the proposed method has a high success index and a low error index for predicting the source of a debris flow.
송창호 ( Chang Ho Song ),이종대 ( Jong Dae Lee ),권유정 ( Yoo Jung Kwon ),이전형 ( Jeon Hyeong Lee ),박진현 ( Jin Hyun Park ),송현남 ( Hyun Nam Song ),김경 ( Kyung Kim ) 대한물리의학회 2009 대한물리의학회지 Vol.4 No.2
Purpose:The purpose of this study was to investigate how much the type of footwear affects these preference and wearing conditions in older women. Methods:Two hundred eight women aged 60∼87 years were recruited from the elder`s College and welfare center in Daegu. Each subject performed questionnaire surveys. Chi-square(χ²) test was used to compare the outcome for differences of age, weight, height, heel height and footwear size. SPSS 12.0 program was used in this study. Results:The type of their possessive shoes were casual shoes (24.8%), running shoes (20.1%) and dress shoes (16%) etc, The type of their short-distance outdoor shoes were casual shoes (32.1%), running shoes (31.4%) etc. The type of their long-distance outdoor shoes were platform shoes (40.3%), dress shoes (31%) etc. Conclusion:The heel height of platform shoes had no relation with demographic factors (age, weight, height), but the size of platform shoes had relation with demographic factors such as age and height except for weight(p<0.05).