코골이 및 폐쇄성 수면무호흡증에서 Laser-assisted Uvulopalatoplasty와 LaserUvulopalatopharyngoplasty의 치료 성적 : 장기추적관찰후 환자 만족도 조사

김재호,이윤식,박형욱,송용진,남순열,김용재,이봉재 대한이비인후과학회 2000 대한이비인후과학회지 두경부외과학 Vol.43 No.2

국내 발전소별 바텀애시를 잔골재 대체재로 사용한 모르터의 특성에 대한 실험적 연구

송민섭,장재봉,조봉석,김재환,김용로,김무한 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)

With the advance in industrial development and modern living comfort, the demand for electricity throughout the country is ever increasing. Also the annual consumption of coal by coal-fired power plants is increasing. The amount of ash produced in 2000 is estimated to be about 4.5 million tons. The disposal of this huge amount of ash introduces serious environmental problems. Fly ash among the ash produced is used in building industries as a substitute to cement in concrete and the concrete thus produced is said to be lighter and stronger. But bottom ash among the ash produced is not used because of its poor properties. But encouraging the use of bottom ash as a construction material is a sensible method of utilization as it avoids the problems and costs associated with disposal and provides an alternative aggregate source. This study is aimed at using bottom ash as an alternative fine aggregate source to provide a solution to disposal and insufficient fine aggregate for the production of concrete. So properties of bottom ash produced in power plants were estimated due to the difference of bottom ash produced in each plant. And mortar strength was estimated as basic data to use bottom ash in building industries.

식물생장조절제 Seaweed extracts(GA14)의 수도 품종간 생육 및 수량에 미치는 효과

송재영,김용일,박보영,정재영,최현구,정종태,이희봉 충남대학교 농업과학연구소 2004 농업과학연구 Vol.31 No.1

This study was carried out to identify the effects of seaweed extracts(GA14) on growth of two rice cultivars, Junambyo and Donganbyo. Seedling qualities of two cultivars were better in all items including heading dates at early stage treated at seedling plus 2-3 leaf stages than at single treatment of seedling. Ripening ratio of Junambyo in paddy field was increased 0.3% by seaweed extracts(GA14) treatment, but that of Donganbyo decreased 0.5%. 1,000 grain weight of Junambyo and Donanbyo by seaweed extracts(GA14) treatment was two to four grams higher and the yield of two cultivars was also higher by three to four percent. Appearance characters of two rice cultivars was high in head, while damaged, chalky and crack rate were low at seaweed extracts(GA14) treatment. Protein, moisture and amylose characteristics related to table quality of Junambyo were not different by seaweed extracts treatment, but table values was high in only treatment. Donganbyo was also similar to Junambyo, but table quality was slightly high at non-treatment.

Lithium Tantalate 적외선 센서의 광전특성에 관한 연구

송재용,장충근,김석원 경북대학교 센서기술연구소 1990 센서技術學術大會論文集 Vol.1 No.1

스퍼터링(sputtering)으로 실리콘 기판위에 LiTaO_(3) 박막을 성장시켜서 비정질 적외선 센서를 제작하고, Crystal Technology회사에서 제공한 LiTaO_(3) 단결정으로 적외선 센서를 제작하여 그 특성을 비교하였다. 센서들의 출력신호, 잡음 및 검지도 등을 조사하여 본 결과 비정질 박막센서의 잡음은 두께가 얇을 수록 적었으며 단결정센서의 잡음 보다 적었다. 그러나 검지도는 단결정센서가 더 높았으며 전반적으로는 비정질 박막센서의 광전특성은 단결정 센서 보다 저조하였다. Amorphus LiTaO_(3) infrared sensors are fabricated with the thin film deposited by RF sputtering technique on silicon wafers, and single crystal infrared sensors were fabricated with the commerical LiTaO_(3) single crystal offered by Crystal Technology Ltd. The signal, the noise and the detectivity are measured, respectively. the noise of the thin film sensors decreases as the thickness decreases and it is smaller than that of the crystal sensors. But the detectivity of the single crystal sensors are higher and the overall photoelectric characteristics of the amorphous thin film sensors were inferior to those of the single crystal sensors.

眉巖 柳希春의 生涯와 學問

宋宰鏞 단국대학교 퇴계학연구소 1996 退溪學硏究 Vol.10 No.-

무기안료가 시멘트모르타르의 압축강도와 흡수율에 미치는 영향

송혁,이재용,고성석 한국안전학회 2004 한국안전학회지 Vol.19 No.2

The aim of this study was to investigate the influence of inorganic pigments on the physical properties of cement mortar. For this purpose, the compressive stieugth and absorption test were carried out on cement mortar mixed with inorganic pigments by changing the proportion of cement mortar, water-cement ratio, and ratio of pigment. The result of this study can be summarized as follows: The compressive strength of colored mortar rapidly increased in red and yellow mortar, as the mix ratio of pigment increased. In case of green and black mortar, however, the compressive strength decreased as the mix ratio increased. In case of red and yellow mortar, the absorption of colored mortar increased as the mixing ratio increased, if the mean particle diameter of the pigment is small. In case of green and black mortar, the absorption ratio decreased as the mix ratio increased. After investigating the overall physical properties of colored mortar, it was confirmed that the proper mix ratio of pigment securing the properties of colored mortar was below 6% of the weight of the cement to be used.

서울시내 특급호텔의 고객애호도 프로그램 운영개선방안에 관한 연구

송용덕,이영재 안양대학교 복지행정연구소 2003 福祉行政硏究 Vol.19 No.-

기존 고객 유지 프로그램에 대한 체계적인 분석과 연구를 통하여 호텔기업 특성에 맞는 기존고객 유지 프로그램 운영 전략방안을 제시하고자 하는 것이 본 연구의 목적이다. 이와 같은 연구 목적을 달성하기 위한 구체적인 목표는 다음과 같다. 첫째, 호텔기업의 기존고객 유지 프로그램의 이론을 체계화하여 분석의 준거로 삼았다. 둘째, 호텔기업의 기존고객 유지 프로그램의 운영현황을 고찰하고 문제점을 파악하고 이에 대한 개선방안을 도출하고자 하였다. 셋째, 이론적 연구와 현황분석의 결과를 바탕으로 호텔기업의 기존고객 유지 프로그램 운영전략 방안을 제시하였다.

낭성법랑모세포종, 함치성낭, 치성각화낭의 방사선소견과 Ki-67, PCNA, Cytokeratin 발현과의 연관성에 관한 연구

송만용,이삼선,이진구,이원진,허민석,이재일,민병무,최순철 대한구강악안면방사선학회 2004 Imaging Science in Dentistry Vol.34 No.2

Purpose : To compare the proliferation potential of the epithelial cells between unicystic ameloblastoma (UA), dentigerous cyst (DC), and odontogenic keratocyst (OKC) and to correlate this proliferation potential with the radiographic features of these three pathoses. Materials and Methods : Immunohistochemical expression of PCNA, Ki-67, and cytokeratin as a proliferation marker were assessed for 15 cases of UA, 15 cases of DC, and 15 cases of OKC. The degree of immunochemical expression of three proliferation markers were correlated with the radiographic features, especially cortical expansion (negative and positive) and shape of border (scalloped and round). Results : Using PCNA and Ki-67, OKC showed the highest proliferation potential and UA the lowest. Statistically significant differences were found between the OKC and the UA (p.0.05). However, no statistically significant difference was present according to the radiographic features in all pathoses. Using cytokeratin, there was no significant differences of proliferation potential among three pathoses. Conclusions : OKC epithelium has the most intense proliferation potential, followed by the dentigeous cyst and then unicystic ameloblastoma. There is no significant relation between the radiographic features and the proliferation potential of epithelium of these three pathoses.

매실 野生 酵母의 醱酵에 관한 硏究

宋寶鉉,金龍斗,李在根 順天大學校 1985 論文集 Vol.4 No.1

매실의 野生酵母를 발효 실험을 통하여 酵母의 同定, 酒精, Fusel oil 및 香氣 成分을 分析한 結果는 다음과 같다. 매실에서 발견된 野生酵母는 Saccharomyce cervisiaeSP. 5종 Pichti속 3종. Torulopsis 2종을 同定하였다. 酒精 生成力은 일발연 1호가 16%였으며 野生 酵母Ⅰ,Ⅱ.Ⅲ,Ⅳ는 각각 15.2%, 14.1%, 7.64% 및 13.5%였다. Fusel oil 生命力은 일발연 1호가 2.7%, 396호가 2.6%였으며 野生 酵母 Ⅰ,Ⅱ,Ⅲ,Ⅳ는 각각 0.5%, 0.3%, 0.3% 및 0.5%로 나타 香氣 成分은 일반연1호, 396호, 野生 酵母Ⅰ은 비슷하였으며 野生 酵母Ⅱ, Ⅲ, Ⅳ는 香氣 成分이 많은 것으로 나타났다. This study was conducted to evaluate the alcohols and flavors through fermentational using the wild yeast isolated in Mume(prunus mume s.e.t.z.)and the wild yeasts were identified, concurrently. The alcohols and flavors were analyzed by chromatography. 5 species(Sacch,cerevisiae sp.), 3 species(Pichia genus)and 2 spcecies(Torulopsis sp.)were identified. In the alcohol yielding ability test of yeasts, the yielding ability was 16% in Sacch cerevisiae, and 15.2%, 14.1%, 7.6%and 13.5% in the wild yeasts(#1,2,3,4), respectively, while in the fusel, the percentage of fusel oil was 2.7% in Sacch. cerevisiae, 2.6% in sacch. formosensis, and 0.5%, 0.3%, 0.3%and 0.8% in the wild yeasts(#1,2,3,4,)respectively. The amount of flavors made by yeasts such as Sacch cervisiae, Sacch. formosensis and wild yeast #1 was similar in each case but that of the wild yearst #2,3,4 was much more than above 3 species yeasts.

RAPD 분석에 의한 굴참나무 집단의 유전변이 연구

송정호,김남수,이용섭,김영중,송재모,이재선 한국유전학회 2002 Genes & Genomics Vol.24 No.2

Quercus variabilis is one of the most important tree species in both utilization of forest resources and management of forest ecosystem in Korea. To obtain the basic information for the establishment of breeding strategy and efficient management of genetic resources, five populations of Q. variabilis from 89 selected plus trees were studied using POPGENE and AMOVA analysis based on DNA markers focussing on the genetic diversity and variation among populations. The overall polymorphic amplicons were 78.6% and levels of genetic diversity within 5 populations were similar each other (Shannon's Index : 0.289∼0.423 [mean 0.366]). The values of total genetic diversity (H_t) and average gene diversity within population (H_S) were 0.265 and 0.239, respectively. The degree of genetic differentiation (G_st : 0.098) was relatively high compared with those of other tree species. Based on the cluster analysis of UPGMA, genetic relationships among 5 populations were not coincided with the pattern of geographic distribution.