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차정호,김영희,노태희,Cha, Jeong-Ho,Kim, Young-Hee,Noh, Tae-Hee 대한화학회 2004 대한화학회지 Vol.48 No.6
본 연구에서는 과학적 모델에 대한 학생들의 견해를 조사하고, 학년과 성, 성취도에 따라 견해를 비교했다. 또한 과학적 모델에 대한 학생들의 견해와 인식론적 신념 간의 상관 관계도 조사했다. 연구 대상은 서울시에 소재한 중학교 2학년 137명과 고등학교 2학년 112명이었다. 학생들은 '모델의 실재성'을 제외하고, 전반적으로 모델에 대해 적절한 견해를 지니고 있었다. 성과 성취도에 따른 비교에서는 상위 수준 학생이나 남학생의 견해가 보다 현대적인 것으로 나타났으나, 학년에 따른 비교에서는 유의미한 차이가 없었다. 상관 분석에서는 모델에 대해 부적절한 관점을 가진 학생들이 전통적인 인식론적 신념을 가지고 있는 것으로 나타났다. The purpose of this study was to investigate students' views on the scientific model and to compare their views by grade, gender, and achievement. Relationships between students' views on the scientific model and epistemological beliefs were also investigated. Participants were 137 8th- and 112 11th-graders in Seoul. The results indicated that the students' views on the scientific model, on the whole, were adequate except the items concerning the 'models as exact replicas'. Male students or high-achieving students had more adequate views on the scientific model than female students or low-achieving students. However, there was no significant difference between 8th- and 11th-graders. In correlation analysis, students with inappropriate views on the scientific model were found to have traditional epistemological beliefs.
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급성기 요추간판탈출증에 있어 봉약침 치료의 효과에 대한 비교 연구
차정호,장소영,이태호,위종성,이은용,Cha, Jung-Ho,Chang, So-Young,Lee, Tae-Ho,Owi, Jong-Song,Lee, Eun-Yong 대한약침학회 2006 Journal of pharmacopuncture Vol.9 No.2
Objective : Herniation of Intervertebral Disc(HIVD) is the most common disease causing low back pain. Acupuncture and Bee Venom Acupuncture has been us ε d for treatment of HIVD. This study is to investigate the effective of Bee Venom Acupuncture for HIVD. Methods : We researched 18 patients who were diagnosed by CT and MRI as having HIVD, and treated them Acupuncture only or Acupuncture and Bee Venom Acupuncture. We compared the VAS and ROM angle of two groups. Results & Conclusions : 1. In admission date, no significant improvement between Acupuncture group and Bee Venom Acupuncture group 2. In variation of flexion and extension, Bee Venom Acupuncture group shows statistically significant improvement 3. In VAS, Bee Venom Acupuncture group shows statistically significant improvement for 1 week and discharge day
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Sapphire(1102) 위에 성장된 단결정 실리콘의 결정성 향상을 위한 열산화막 공정
차정호,김득영,박찬진,권영해,조훈영,이연환 한국물리학회 2003 새물리 Vol.46 No.3
Silicon epilayers were grown on (1$\bar{1}$02) sapphire substrates by using rapid thermal chemical vapor deposition (RTCVD) and a thermal oxidation process was used to enhance the crystal quality and to control the epilayer thickness. In the case of the Si epilayer grown at 900 $^\circ$C, the properties of single crystal Si(100) appeared and the epilayers had good crystallinity after the ensuing thermal oxidation process. From Raman spectroscopy, the compressive strain of the as-grown samples was about 1.09 $\times$ 10$^9$ dyne/cm$^2$, while that of the sample after thermal oxidation was reduced to 0.74 $\times $10$^9$ dyne/cm$^2$. As the oxidation time was increased from 4 h to 8 h, the oxidation thichness thicker. The sample processed for 4h showed the least surface roughness and the best crystal qualities. The decrease in crystal quality after with increasing processing time is thought to be due to the thinner epilayers during removal of the effective Si epilayer having more defects near the interface between the substrate and the Si epilayer. 급속열화학증착법을 이용하여 (1$\bar{1}$02) 방향의 사파이어 기판 위에 실리콘 에피층을 성장하여, 에피층의 결정성을 향상시키고 두께를 조절하기 위하여 열산화막 공정을 수행하였다. 900 $^\circ$C에서 성장된 실리콘 에피층의 경우 (100)면의 단결정 특성을 나타내었으며, 열산화 과정을 통하여 결정성이 향상됨을 확인하였다. 열산화막 형성 전에 실리콘 박막에 대한 Raman 분석을 한 결과 bulk 실리콘 보다 압축 변형력은 약 1.09 $\times$ 10$^9$ dyne/cm$^2$ 이었으나 열산화막 공정 후 0.74 $\times$ 10$^9$ dyne/cm$^2$ 로 감소하였다. 열산화막 형성 시간을 4시간, 6시간 및 8시간으로 변화시키며 특성을 분석한 결과 4시간일 경우에 가장 우수한 특성을 나타내었고, 산화막 형성 시간이 길면 길수록 산화막 두께가 증가하였다. 이 과정에서 산화막이 실리콘 에피층을 잠식함에 따라, 그 후에 진행된 산화막 제거과정을 통해 유효 실리콘 층의 두께가 얇아지면서 계면에 가까워질수록 결정학적인 측면에서의 특성이 저하된 것으로 제안한다.
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눈둘레근뒤 지방과 앞사이막 지방 단위의 재배치술을 통한 눈썹하 절제술
차정호,우상민,김진우,정재학,김영환,선욱 대한성형외과학회 2011 Archives of Plastic Surgery Vol.38 No.4
Purpose: Retro-orbicularis oculi fat (ROOF) and preseptal fat pad (PSF) are deep fat structures of frontal and supraorbital area, that encounter galeal fat pad (GFP). If galeal wall is weakened by aging process, GFP loses its anchoring structure, moved downward pushing ROOF and PSF. This especially occur in lateral brow area. As a result of drooping, eyebrow affects the eyelid covering PSF as a sac descended to a lateral hooding and ptotic eyelid simultaneously. Consequently, in the case of lateral hooding and brow ptosis, besides the skin, deep fat structures (ROOF and PSF) should be corrected as well. Methods: ROOF-PSF repositioning technique in subbrow resection were performed. 21 cases of patients from April, 2007 to January, 2008. Before surgery, all patients were examined carefully to evaluate the degrees of dermatochalasia, drooping of the eyebrow, marginal reflex distance 1 (MRD1), eyelid crease height. Surgery was performed under local anesthesia, then excised the drooped eyelid skin by lateral subbrow resection, removed proper amount of ROOF, repositioned ROOF-PSF at the supraorbital rim, and fix it on periosteum. During follow up periods, the patients were surveyed of the satisfaction of surgery, and postoperative MRD1 was evaluated. Results: One patient had a hematoma on left eyebrow, and another one patient had a numbness on left forehead for two months. Except for these two patients, all patients had good results without any significant complications. The mean follow up period was about 5 months, and the position of lateral eyebrow maintained above the supraorbital rim in all cases. Postoperatively, MRD1 increased by 0.8 mm in 5-months mean follow up period. Conclusion: In patient with lateral brow ptosis and lateral hooding, the ROOF-PSF repositioning technique in sub-brow resection could be a good operative option.
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제7차 중등 과학 교과서의 화학 영역에 사용된 비유 분석
차정호,변순화,노태희,Cha, Jeong-Ho,Byun, Soon-Hwa,Noh, Tae-Hee 대한화학회 2004 대한화학회지 Vol.48 No.6
제7차 교육과정에 따른 중등 과학 교과서 중 화학 영역에 사용된 비유를 분석하였다. 전체 35권의 교과서에서 비유 사용 빈도는 325회로 13쪽마다 평균 1회 사용되었고, 단 한 번만 사용된 비유가 많았다. 유형별로는 기능적 비유, 언어와 그림을 모두 사용한 비유, 추상적 목표물을 구체적 비유물로 설명한 비유, 단순 비유와 부연 비유, 교사 중심 비유, 체계성이 낮은 비유가 많았고, 일상 비유와 작위적 비유가 비슷하게 사용되었다. 교과서 본문 중에 '비유‘라는 용어를 사용한 경우는 적었으며, 제한점에 대한 언급은 거의 없었다. 제6차 교육과정에 따른 과학 교과서에 비하여 쪽 당 비유의 수는 증가하였으나, 표현 방식, 작위성, 학습자 참여성을 제외한 모든 유형에서 비슷한 경향을 나타내었다. 이 결과들에 대한 교육적 시사점을 논의하였다.
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Formidable Angiosarcoma of the Scalp
차정호,오석준,문민철,고성훈,Cha, Jeong-Ho,Oh, Suk-Joon,Moon, Min-Cheol,Koh, Sung-Hoon Korean Society of Plastic and Reconstructive Surge 2010 Archives of Plastic Surgery Vol.37 No.5
Purpose: Angiosarcoma is a tumor of mesenchymal origin with an extremely high rate of metastasis and invasiveness. This tumor is notorious for its very poor prognosis, although surgical excision followed by radiation therapy is considered to be effective by many. The authors experienced three angiosarcoma patients with their tumors removed and wounds covered with split-thickness skin grafts and/or latissimus dorsi free flaps. Methods: Three patients were admitted to our hospital showed plaques of different morphology. Based on their medical records, these patients were classified by sex, age, type of reconstruction, recurrence, and further treatment after surgical removal. Results: All patients were male, with a mean age of 72 years (range, 66 to 77 years). Split-thickness skin grafts with latissimus dorsi free flaps were performed on two cases, and of these two cases, cervical lymph node biopsy was done in one case, and radical neck dissection was done in the other. In all cases, radiation therapy was done within two weeks of tumor removal. Distant metastasis occurred without local recurrence in two of the cases. Lung was the first organ affected by metastasis. In the remaining case, the tumor recurred locally 6 times, and additional excision was necessary. All patients died due to local recurrence and lung metastasis. Conclusion: Irregular margins and high recurrence and metastasis rates cause a poor prognosis in large angiosarcoma of the scalp. Radiotherapy and chemotherapy should be strongly considered in large angiosarcomas.
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