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姜錫虞 釜山敎育大學 1971 부산교육대학 논문집 Vol.7 No.1
At this when the modernization of mathematics education and arithmetic education is strongly demanded, the writer wants to discuss in this study the arithmetic education in the elementary school from th point of "thinking as a set". To begin with, the units of multiplication concept, fraction, and ratio are to be explained from the viewpoint of "a set". By making clear the thinking of a set and by improving the methods of instruction in the elementary school arithmetic, the possibility of educating the modern people more efficiently and more intelligently will be greatly increased. As the result of this study, the writer has found out the following facts. ① Fraction is resulted when we express the comparison of certain quantity with some other quantity of the same kind. ② Fraction can be arranged in a line according to the size of it. ③ Addition of fraction is determined by comparing the sum of two quantities with some other quantity of common nature. ④ As the result of comparing A with B, B with C respectively when we get three quantities of the same kind: A, B, C; multiplication of fraction is dermined through the comparison of A with c.
사진 필름상의 할로겐은 입자가 레이저광 회절 무늬에 미치는 영향에 관한 이론적 고찰
강석호,김달우 嶺南大學校 工業技術硏究所 1982 연구보고 Vol.10 No.1
It was theoretically considered whether the silver-halide grains remained on the slide film on which round or rectangular particles as particle sample were photographed affect the laser diffraction pattern intensity It is confirmed that grain size of 0.7 to 2.3㎛ on the film does not affect the pattern analysis of the particle images diffracted with laser light whose wavelength is 0.6328㎛. In theory, the distances between adjacent grains affects the pattern intensity, but this effect can be also negligible, if the distance is not shorter than 10 times of the wavelength of the laser light.
순구개열자의 선천결손치와 과잉치의 발생빈도에 관한 연구
강종화,강정숙,손우성 대한치과교정학회 1993 대한치과교정학회지 Vol.23 No.3
The purpose of this study was to evaluate the frequency of congenital missing teeth and supernumerary teeth in cleft patients. The subjects were divided into bilateral cleft lip and palate(BCLP), unilateral cleft lip and palate(UCLP) and cleft palate alone(CP alone) group. 97 cleft patients(BCLP 15, UCLP 70, CP alone 12) between 6-20 years old were evaluated. Panorama film, Orthodontic chart and initial intraoral photogram were employed for this research. The obtained results were as follows. 1. The incidence of congenital missing teeth in total cleft samples was 57.7%, and the incidence of supernumerary teeth was 26.8%. Each incidence was higher than non-cleft. 2. The Incidence of congenital missing teeth was the highest in BCLP and the lowest in CP alone. 3. The number of congenital missing teeth per perso was usually one, and the frequency was higher in the maxilary lateral incisors(67.8%), and maxillary second premolar(14.9%) than other teeth. 4. Most of tooth number anomalies in cleft patients were found in maxilla, especially adjacent region to the cleft site.
강혁주,김성욱,최석진,이중현,장재식,서영범,윤병구,박건욱,김성자,김용섭,강승완,이구,양창헌,이창우,김욱년,이광헌,서정일 동국대학교 의학연구소 2000 東國醫學 Vol.7 No.-
과립상 세포종은 Schwann 세포 기원으로 생각되며 인체에 비교적 드물게 발생한다. 과립상 세포종은 전신 어느 곳에서나 발견될 수 있으나 주로 혀, 구강, 피부 혹은 유방 등에서 호발하며 드물게 위장관에서 발견된다. 위장관에서는 식도에서 가장 호발하며 다음으로 위, 대장 순이다. 과립상 세포종은 대부분, 특히 위장관에서는 양성이며 소수의 악성 병변이 보고되었다. 이러한 이유와 함께 수술 전의 진단이 어렵기 때문에 과립상 세포종에 대한 근본적인 치료는 현재까지 외과적 절제술이다. 최근에 시도되는 치료방법들로는 내시경적 레이저 치료, 용종절제술, 내시경적 점막 절제술 등이 있다. 저자들은 상부 소화관 내시경검사를 시행하여 식도 과립상 세포종을 진단하고 내시경적 점막 절제술을 시행하여 합병증 없이 퇴원하여 현재 재발없이 경과 관찰중인 1례를 경험하였기에 보고하는 바이다. Granular cell tumors, which occur infrequently, are probably of Schwann cell origin. They can occur almost anywhere in the body but usually affect the tongue, oral cavity, skin, or breasts and are rarely found in the gastrointestinal tracts. The esophagus is the most frequent gastrointestinal site, followed by the stomach and the colon. Granular cell tumors are generally benign, especially in the gastrointestinal tract, some malignant lesions have been reported. For this reason, and also because preoperative diagnosis is difficult, the standard treatment for granular cell tumor has until now been surgical excision. In recent years, other therapeutic methods is endoscopic laser therapy (ELT), polypectiomy, endoscopic mucosal resection (EMR). We report a case of esophageal granular cell tumor which was diagnosed by an endoscopy and managed using an endoscopic mucosal resection without complication.
Pd 촉매하에서 allylic alcohol과 hypervalent iodine 화합물의 위치 선택적 vinylation에 관한 연구
강석구,이홍우,장수범,김태현,편성재 성균관대학교 기초과학연구소 1995 論文集 Vol.46 No.2
The formation of carbon-carbon bond by palladium-catalyzed coupling of aryl or vinyl halides with olefins, known as the Heck reaction, has become a powerful tool in organic chemistry. In the case of allylic alcohols, palladium-catalyzed reaction of organic halides usually affords β-substituted ketones or aldehydes rether than β-substituted allylic alcohols.
Pd 촉매하에서 유기주석 화합물과 Iodane 화합물의 Cross-Coupling 반응에 관한 연구
강석구,이홍우,김재선,최상철 성균관대학교 기초과학연구소 1996 論文集 Vol.47 No.1
The palladium-catalyzed coupling of organostannanes with iodanes(Koser's and Zefirov's reagents) in the presence of palladium catalyst was accomplished at room temperature under aqueous conditions to afford phenyl- or 4-iodophenyl-substituted products depending on the iodanes used.
姜興順,林順英,南昌祐,尹錫權,邊時明 同德女子大學校 1995 同大論叢 Vol.25 No.1
To investigate the volatile flavor components of perilla leaves, analyses of kinds of cultivar by GC, GC/MS, UV, IR and NMR were carried out. The results obtained were summarized as follows : 1. The essential oils were extracted with diethyl ether after steam disillation. 2. The identified volatiles include 10 hydrocarbones, 6 alcohols, 3 aldehydes, 2 ketones and 1 miscellaneous components. 3. The major volatile component perilla ketone was identified by UV, IR and NMR spectrum. 4. The perilla ketone were identified in Suwon 8, 19, 21, 23, 24, 25, 26 and purpurea while perillaldehyde was identified in purpurea only.
Pd 촉매 하에서 terminal alkynes, aryl, alkenyl 혹은 alkynyl iodine 화합물의 수용성 조건에서 cross-coupling에 관한 연구
강석구,이홍우,장수범,호필수 성균관대학교 기초과학연구소 1995 論文集 Vol.46 No.2
The ligand-free Pd(OAc)_2-catalyzed coupling reaction of aryl-, alkenyl-, and alkynyliodonium tetrafluoroborate and iodanes with terminal alkynes proceeds readily in the presence of NaHCO_3 in aqueous medium to afford the substituted alkynes in high yields under mild conditions.
안면비대칭을 동반한 Angle Ⅲ급 부정교합자의 안모형태에 관한 두부방사선계측학적 연구
손우성,강정숙,김미경,김종렬 대한치과교정학회 1994 대한치과교정학회지 Vol.24 No.4
The purpose of this was three-fold: i) to investigate the degree of asymmetry in Angle's Class Ⅲ malocclusion patients and normal adults; ⅱ) to determine the nature of difference existed between two groups; and ⅲ) to investigate the correlationship between the degree of asymmetry and ANB and overbite in Angle's Class Ⅲ malocclusion patients. The subjects consisted of 25 Angle's Class Ⅲ malocclusion patients and 25 normal adults and the mean ages were 22.0 and 24.5 years, respectively. Their posteroanterior and lateral cephalograms were traced and analysed with three-dimensional approach. The results were as follows: 1. Asymmetry of Angle's Class Ⅲ malocclusion group was significant in all regions except cranial base. Their horizontal asymmetry was seen in mandibular angle, maxillary and mandibular midline and menton. Vertical asymmetry was observed in maxillary lst molar and mandibular shape and anteroposterior asymmetry in mandibular angle. 2. Nine variables indicating asymmetry were selected and each variable had similar discriminant score. 3. There was a little correlationship between ANB and asymmetric variable(MSR-B6) and its correlation coefficients was 0.3564. 4. There was no significant correlationship between overbite and asymmetric variables.