MEMS 및 Microsystem 기술동향 : KIST 디스플레이 및 나노 소자 연구실을 중심으로

주병권 경북대학교 센서기술연구소 2002 센서技術學術大會論文集 Vol.13 No.1

3kW 주택보급용 계통연계 태양광발전시스템 운전결과 분석

임병옥,이강연,박정민,조금배,백형래,최창주 조선대학교 에너지.자원신기술연구소 2003 에너지·자원신기술연구소 논문지 Vol.25 No.1

上顎第一乳臼醫의 早期萌出 症例

白秉周 全北大學校 齒醫學硏究所 1985 전북치대논문집 Vol.3 No.1

A clinical report of an erupted immature primary molar in a newborn is presented. The occurrence of a natal or neonatal molar can be considered a rare event since the majority of cases described are incisors. Clinical appearance, location, and radiographical examinations were used to establish the identity of the lesion. The literature related to natal and neonatal teeth is reviewed with emphasis on molars, and surgical management in the newborn is discussed.

조직구 증식증 : Hand-Schuller-Christian 병에 대한 증례보고

백병주,김재곤,정미우 大韓小兒齒科學會 1988 大韓小兒齒科學會誌 Vol.15 No.1

Histiocytosis X is a proliferative disorder of histiocytes that consisting of three clinical syndromes which shared several basic clinical and histopathologic features ; Letterer-Siwe disease, Hand-Schuller-Christian disease, and eosinophilic granuloma Hand-Schuller-Christian disease commonly affects older children between the ages of 5 and 10. but may be seen in any age group. It typically follows a more chronic courses. 7 years old female are refered to the Dept. of Pedodontics. College of Dentistry. Chonbuk National University due to the severe tooth mobility on whole dentition. clinical examination., radiographic and histopathologic findings were used to evaluation of the lesion. The purpose of this article is to report a case of histiocyte involving oral cavity and to review the procedure involved in the diagnosis and treatment of this disorder.

불소함유여부에 따른 치면열구전색제의 전단결합강도에 관한 실험적 연구

백병주,김재곤,허선,권선자 大韓小兒齒科學會 1996 大韓小兒齒科學會誌 Vol.23 No.2

This study was to evaluate shear bond strength fluoride-relesing sealant and nonfluoride-relesing sealant to enamel surface of bovine tooth. 80 extracted bovine teeth were randomly assigned to four groups,and four kind of sealants including Teethmate-A(Kuraray Co.),Teethmate-F(Kuraray Co.),Helioseal(Vivadent Co.),Helioseal-F(Vivadent Co.) were bonded to exposed enamel surfaces using silicon plate. Shear bond strength was determined in an instron universal testing machine at a crosshead speed of 1mm/min.Then,the fracture surfaces of test specimens were investigated with scanning electron microscope. The obtained results were as follows; 1.The shear bond strength decreased in the following oder:Teethmate-A(18.31MPa),Teethmate-F(11.90MPa),Helioseal(11.74MPa),Helioseal-F(10.64MPa). 2.The shear bond strength of Teethmate-A showed significantly higher than that of Teethmate-F(P<0.05),but Helioseal and Helioseal-F didn't showed statistically different(P<0.05). 3.According to the SEM,Teethmate-A group showed cohesive failure,and Teethmate-A group & Helioseal group showed mixed pattern of cohesive failure and Helioseal-F group showed adhesive failure.

집단 따돌림 피해학생을 대상으로 한 인지행동적 집단치료 개발을 위한 예비 연구

이주현,신지용,연병길,한창환 대한소아청소년정신의학회 2000 소아청소년정신의학 Vol.11 No.2

본 연구는 집단 따돌림 피해학생을 대상으로 시행한 인지행동적 집단치료의 개발을 위한 예비 연구이다. 정상적인 중학교 1학년 학생 202명에게 도덕발달수준척도, 오퍼 자아상척도, 우울 및 상태ㆍ특성불안척도의 분포와 상관관계를 조사하였다. 자아상과 우울, 불안은 서로 강한 상관관계를 보였으나, 도덕발달과는 상관관계를 보이지 않았다. 이는 도덕발달이 정서에 크게 영향받지 않고 인지 발달적 과정에 의존하는 것을 시사한다. 그리고 교사의 관찰에 의해 집단 따돌림 피해를 받으면서 학교 적용에 어려움을 보이는 중학교 1학년 학생 5명의 도덕발달수준척도, 오퍼 자아상척도, 우울 및 상태ㆍ특성불안척도는 전체 집단과 유의한 차이를 보이지 않았다. 이 피해학생들을 대상으로 12회에 걸쳐 인지적 집단 정신치료를 시행하고, 치료 전후에 상기 4가지 척도의 변화를 평가하여 효용성을 검정하였으나 통계학적으로 유의한 변화는 없었다. 그러나 참가 학생들이 치료 기간 중에 기재한 일기에서 확인되는 심리적 마음자세(psychological mindedness)의 향상과 담임 교사의 긍정적인 평가보고는 의미있는 것으로 생각되었다. 중심 단어 : 집단 따돌림ㆍ인지행동적 집단치료ㆍ청소년ㆍ자아상ㆍ도덕발달ㆍ우울ㆍ불안 Bullying is the intentional, unprovoked abuse of power by one or more children to inflict pain on or cause distress to another child on repented occasions. Bullying can be considered to be a form of child abuse : peer abuse. Victims suffer adverse effects in the short and long term. If bullying is regarded as a form of abuse then professionals have a duty to detect it, take it seriously, and ensure that it is deal with to reduce the child's suffering and minimize the potential long term effects. This study is aimed preliminarily the development of cognitive behavioral group therapy for school bullied. 202 normal middle school freshman responded to self report scales-Offer's Self-Image Questionnaire-Revised, Children's Depression Inventory, Spielberger State/Trait Anxiety scale, and Defining Issues Test. The data were analyzed with Pearson's correlation to test the relationship among the above 4 variables. Self Image, depression, and anxiety were correlated strongly each other. But moral development was not correlated with self image, depression, and anxiety. Five school bullied students were referred by their teacher for school maladjustment. The author tried 12 sessions of Cognitive-Behavioral group therapy and assessed their behaviors pre- and post intervention by above 4 scales. There were no significant different intervention effects statistically. But It is meaningful that improvement of psychological mindedness in diary written by subject in treatment sessions KEY WORDS : School bullyingㆍCognitive-behavioral group therapyㆍAdolescentㆍSelf imageㆍMoral developmentㆍDepressionㆍAnxiety

소아의 최대개구량에 관한 연구

백병주,김상훈,양연미,김재곤 大韓小兒齒科學會 2001 大韓小兒齒科學會誌 Vol.28 No.4

최근에 측두하악장애(Temporomandibular Disorder, TMD)는 해마다 증가하는 경향을 보이고 있다. 측두하악장애는 저작근, 측두하악관절 및 그와 관련된 구조물의 많은 임상증상을 포함하는 포괄적인 용어이다. 측두하악장애로 치과에 내원하는 환자는 여성이 많으며, 각 연령별 분포에서 보면 10대 후반에서 20대 후반에 호발한다. 그러나 최근에는 호발연령이 낮아지는 경향을 보이고 있다. 이에 측두하악장애의 조기진단의 필요성이 요구되어지며, 본 논문에서는 진단의 한 방법으로 간편하면서 쉽게 시행할 수 있는 최대개구량을 측정하였다. 최대개구량에 관한 여러 보고가 있지만, 소아기의 전 연령을 대상으로 광범위하게 조사된 보고는 희귀하다. 이에 저자는 4세부터 13세까지 1775명의 어린이를 대상으로 최대개구량을 측정하였으며, 최대개구량과 연련, 신장, 체중에 관한 상관관계를 조사하여 악관절장애 진단의 기초적인 참고자료로 이용하고자한다. 본 연구에서는 4세에서 13세까지의 1775명(남자943명, 여자832명)을 대상으로 최대개구량과 연령, 신장, 체중의 상관관계에 관한 비교분석을 시행하여 다음의 결론을 얻었다. 1. 4세에서 12세까지의 연령군중 4세, 8세, 12세의 평균 최대개구량을 보면 남자의 경우 각각 40.16mm, 47.32mm, 50.54mm였고, 여자의 경우 각각 39.79mm, 44.85mm, 48.09mm였다. 2. 연령이 증가함에 따라 최대개구량은 증가하는 경향을 보였고, 남자가 여자보다 큰 측정치를 보였다. 3. 신장이 증가함에 따라 최대개구량은 증가하는 경향을 보였으며, 105cm 이상 115cm 미만을 제외하고는 남자가 여자보다 큰 측정치를 보였다. 4. 체중이 증가함에 따라 최대개구량은 증가되는 경향을 보였으며, 모든 군에서 남자가 여자보다 큰 측정치를 보였다. 5. 최대개구량과 연령, 신장, 체중간의 관계에서 유의한 순상관 관계를 보였으며, 신장이 가장 높은 상관성을 보였다. Recently, tempormandibular disorder(TMD) shows an tendency to increase every year. TMD is a collective term embracing a number of clinical problems that involve the masticatory musculature, temporomandibular joint(TMJ) and associated structures, or both. TMD, viewed in distribution of age, often occurred from late teens to late twenties. But recently, the age of occurrence tends to be lower. Accordingly, early diagnosis of tempormandibular disorder is very important. In this study, we measured the maximum mouth opening which is simple and easy to carry out as a way of TMD diagnosis. In this study, the maximum mouth opening was examined for 1,775 children from 4 to 12 years of age. We compared the relationship between the maximum mouth opening with the age, height, and weight. The results obtained were summarized as follows; 1. The mean maximum mouth openings of 4, 8, and 12 year of age were respectively 40.16mm, 47.32mm, 50.54mm for male, 39.79mm, 44.85mm, 48.09mm for female. 2. The maximum mouth opening increased with age, and the values were greater in male than in female. 3. The maximum mouth opening increased wit height, and the values were greater in male than in female except between 105cm and 115cm. 4. The maximum mouth opening increased with weight, and the values were greater in male than in female. 5. The correlation between the maximum mouth opeing with the age, height, and weight was all significant and height showed the highest correlation.

치아종에 대한 증례보고

백병주,김재곤,주훈,양정숙 大韓小兒齒科學會 1995 大韓小兒齒科學會誌 Vol.22 No.2

Odontomas are most common benign odontogenic tumors, and have been defined as "mixed odontogenic tumor composed of epithelial and mesenchymal cells". Many authors are considered to be malformations rather than neoplasm. The etiology of odontoma is uncertain but hypothesized to involve local trauma, infection, inheritance or mutant gene interference with genetic control of tooth development. The recent classification by WHO divides odontoma into 2 groups such as complex odontoma and compound odontoma. Odontomas are usually asymptomatic and are usually discovered on routin dental radiographs. The most frequently encountered symptoms are impacted tooth and swelling. Radiographically, it appears as an irregular mass of calcified material surrounded by a radiolucent band. The possibility of an ameloblastic odontoma must be kept in mind during the differential diagnosis. Surgical excision and histopathological examination of the lesions is recommended. Following removal of the odontoma closing the incision and allowing the tooth to erupt spontaneously was considered. Hitchin suggested that spontaneous eruption may not occur if the root of the impacted tooth is completed. Failure to erupt would require a 2nd surgical exposure to place an orthodontic attachment. This report presents the result in treating patients, whose chief complaint was delayed eruption of teeth due to odontoma.

고혈압백서 대동맥에서 Ca에 의한 수축에 미치는 Na/Ca교환기전의 영향

전병화,김국성,박경숙,김주석,김세훈,장석종 충남대학교 의과대학 지역사회의학연구소 1999 충남의대잡지 Vol.26 No.1

We investigated the contraction by sodium-calcium(Na-Ca) exchanges in the aortic strips of spontaneously hypertensive rats(SHR) and Wistar-Kyoto (WKY) rats. Resting tension of aortic strips in SHR was decreased by the removal of extracellular Ca and those were recovered by the addition of Ca. However, resting tone of aortic strips in WKY was not changed by Ca removal or Ca addition. Ca-induced contraction after exposure to Ca-free solution was suppressed by verapamil 10^-6M to 90% or more. In the presence of verapamil 10^-5M, phentolamine 10^-6M, caffeine 5mM and atropine 10^-6M, the reduction of extracellular sodium concentration([Na]o) from normal(158 mM) to 0 mM(replaced by choline chloride) caused the contraction(Ca entry by Na-Ca exchange). The amplitude of contraction was more greater in SHR than in WKY rats. In the presence of verapamil 10^-5M, phentolamine 10^-6M, caffeine 5mM and atropine 10^-6M, aortic strips were not contracted by Naand Ca-free solution, but was contracted by the addition of Ca. In the presence of verapamil 10^-5M and phentolamine 10^-6M and ouabain 10^-5M, Ca did not induce contraction after exposure to Ca-free Tyrode ' s solution, but in the presence of verapamil 10^-5M and phentolamine 10^-6M and monensin 10^-5M a sodium ionophore, Ca induced a little contraction in the aortic strips of SHR. These observations suggest that Na-Ca exchange does not contribute the development of Ca-induced contraction after exposure to Ca-free Tyrode ' s Solution in the presence of normal extracellular Na concentration. However, Na/Ca exchange in vascular smooth muscle is increased in SHR and may be involved in the mechanism for hypertension in SHR.

齒牙우식兒童과 그의 母親의 齒苔에서 分離한 Streptococcus mutans의 血淸型 分布및 藥劑耐性에 關한 硏究

白秉周 大韓小兒齒科學會 1984 大韓小兒齒科學會誌 Vol.11 No.1

A total of 141 strains of Streptococcus mutans were isolated from dental plaques of 153 subjects. Eight-two children with caries-experience, 18 caries-free children and their mothers were participated. All isolates were examined for their serotypes by immunodiffusion method with 7 reference sera and their antibiotic susceptibilities to 7 antibiotics by agar dilution method using 7 kinds of antibiotics, and were compared their results by caries experience (DMFT ratio) and by intrafamilial levels. 1. Isolation rate of Streptococcus mutans were greater in samples of carious teeth than those of sound teeth, and in mothers than in children. 2. Multiple serotypes of Streptococcus mutans were occasionally found in a single samples. 3. Of the total 141 isolates (83 isolates from children, and 58 from their mothers), type c isolates were most prevalent (63.8%). Type d,e and f were found, comprizing 14.9%, 10.6% and 6.4% respectively, Serotype g, a and untypable strain were also found but far lower frequencies (2.8-0.7%), and type b was detected. 4. These results suggest that there are no significant correlation among the distribution of serotypes, antibiotic susceptibilities, caries experience and intrafamilial relationships. 5. Most of isolates were susceptible to chloramphenicol (100%), penicillin (95.7%), ampicillin (94.3%), and gentamicin (92.2%), but about one-third isolates were resistant to cephaloridine (27%), streptomycin (33.3%) and kanamycin (47.6%), resulting that 91 strains (64.5%) among 141 isolates were resistant to one or more drugs used. 6. Of the 91 resistant strains, 20 different resistant patterns were observed, and the most frequently encountered patterns were KM, SM and CE.