역관절 동통 및 기능장애

조병욱 한림대학교의료원 1982 人間科學 Vol.6 No.7

소규모수도시설 지하수의 라돈저감 특성

조병욱 대한지질공학회 2019 지질공학 Vol.29 No.1

It is possible that radon removal in groundwater of small-scale water supply system (SWSS) is caused by atmospheric storage and aeration facilities installed in the water tank. Radon removal rates at water tank and tap of the 32 SWSS during summer season ranged from -69.3% to 62.7% (average 25.7%) and from -64.3% to 83.1% (average 30.3%) while those of 16 SWSS during autumn season ranged from 21.3% to 78.0% (average 42.8%) and from 17.7% to 66.9% (average 44.8%). The reason of higher radon removal rate in the autumn season compared with the summer season is due to higher atmospheric storage effect by lower groundwater use rate. The radon removal rates at the water tank from 12 SWSS were 47.4∼94.0% (average 78.9%), in which the removal rates at the atmospheric storage are also included. Atmospheric storage and aeration can be used to reduce radon concentration in SWSS groundwater. For more efficient use of radon reduction, further studies are necessary to assess the radon removal rate considering variation conditions of radon concentration in groundwater, size and forms of water tank, change in groundwater usage rate, aeration capacity and ventilation facilities. 지하수를 원수로 이용하는 소규모수도시설의 라돈 저감은 주로 저수조에서의 정치와 폭기에 의해 일어난다. 여름철 정치에 의한 32개 소규모수도시설 저수조와 꼭지수의 라돈 저감율은 -69.3∼62.7%(평균25.7%)와 -64.3%∼83.1%(평균 30.3%), 가을철 정치에 의한 16개 소규모수도시설 저수조와 꼭지수의라돈 저감율은 21.3%∼78.0%(평균 42.8%)와 17.7%∼66.9%(평균 44.8%)로 나타났다. 여름철보다 가을철의 라돈 저감률이 더 높은 것은 가을철의 지하수 사용량이 더 적어서 정치효과가 더 컸기 때문으로판단된다. 폭기시설이 설치된 12개 저수조의 라돈 저감률은 47.4∼94.0%(평균 78.9%)로 나타났는데이 저감률에는 정치에 의한 라돈 저감률이 합쳐져 있다. 소규모수도시설 지하수의 라돈 저감을 위해서는 정치와 폭기를 이용할 수 있는데 보다 효율적인 활용을 위하여 지하수의 라돈 함량 변동성, 저수조의크기와 형태, 지하수 사용량 변화, 폭기량, 환기시설 등을 고려한 라돈 저감 연구가 필요하다

말단에trifluoromethyl group을 갖는 새로운 액정화합물의 합성 및 특성에 관한연구

조병욱,최재곤,방문수 조선대학교 생산기술연구소 1989 生産技術硏究 Vol.11 No.2

New liquid crystal compounds with a central spacer and two terminal trifluoromethyl groups were synthesized. These compounds consist of rnesogenic units of dyad or triad aromatic esters interconnected with flexible spacers such as decamethylene or disiloxyl groups. The structures of compounds are as follows; ◁화학식 삽입▷ (원문을 참조하세요) Their thermal transitions and thermotropic behavior were investigated by differential scanning calorimetry(DSC) and on the hot-stage of a polarizing microscope. As a result of investigation, of the compounds with dyad mesogenic units, compound 〔I〕 did not formed mesophase, and compound〔II〕exhibited monotropic smectic mesophase. On the other hand, compounds with triad mesogenic unit showed on enantiotropic mesophase. The phase transition temperatures of the compounds with dyad mesogenic units which consist of decarnethylene spacers were higher than those of having disiloxyl spacers. In case of the compounds with triad mesogenic units, the transition temperatures showed lower those of the compounds with decamethylene spacers.

괴산지역 지하수의 라돈 함량

조병욱,Cho, Byong-Wook 한국지하수토양환경학회 2017 지하수토양환경 Vol.22 No.5

Radon concentrations were measured in 250 groundwater samples collected from the Goesan area where uraniferous black slate and granites abundantly occur in the formations. The measured radon levels ranged from 0.90 to 7,218.7 Bq/L with the median value of 54.3 Bq/L, similar to the value measured in the nationwide survey in 4,853 wells (52.1 Bq/L). The median value was highest in the Cretaceous granite area (390.0 Bq/L) while it was as low as 20.0~58.8 Bq/L in the Ogcheon meta-sedimentary rock areas. About 23.6% of the total samples exceeded the WHO guideline value of 100 Bq/L established in 2011. The exceeding rate was 69.0, 39.4, and 7.0~13.7% in the Cretaceous granite area, Jurassic granite area, and Ogcheon meta-sedimentary rock areas, respectively.

흑액 적용에 의한 라이너지 강도 향상

조병욱 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0

국내 골심지용 라이너지 및 이면 라이너지는 국내산 폐골판지(KOCC, Korean Old Corrugated Container)를 주원료로 한다. KOCC는 재활용 횟수가 많기 때문에 섬유가 단섬유화 및 각질화가 많이 되어, 강도적 성질 발현이 불리한 특성을 가지고 있다. 품질향상을 위해 라이너지의 압축강도 및 내절도를 향상시킬 방안이 필요한 실정이다. 리그닌은 목재에서 섬유사이를 결합시켜 주는 천연접착제로서,펄프화 시 약품에 의해 용해되어 흑액으로 추출된다. 펄프 흑액은 저분자화된 리그닌, 헤미셀룰로오스 등의 당류, 목재 추출물, 잔여 알칼리 등으로 구성되어 있고, 현재 대부분의 크라프트 펄프 공장에서는 흑액을 태워서 스팀을 생산하고, 펄프 및 제지공장의 에너지원으로 사용하고 있다. 본 연구에서는 흑액을 태워서 소모하는것이 아니라, 소재화 방안의 일환으로 골심지용 라이너지 및 이면라이너지의 지력 증강제로서 사용하는 기술을 개발하고자 하였다. 흑액은 표면사이징에 의해서 종이에 적용하였다. 또한 리그닌 및 헤미셀룰로오스의 섬유에의 흡착 및 저분자들의 응집을 도모하기 위하여 알럼을 첨가하였다. 소량이 알럼을 사용하여 흑액 내 고형 분을 응집시켜 표면사이징하는 것이 라이너지의 인장강도, 압축강도, 내절도를 향상시키는데 유리한 것으로 나타났다.

수도권 산업단지 내 지식산업센터 매매가격 결정요인 연구

조병욱,유주연 한국부동산연구원 2019 부동산연구 Vol.29 No.2

The purpose of this study is to analyze the price determinants of Knowledge Industrial Centers according to locational characteristics and building characteristics. Regarding the price determination of centers that are new, industrial complex buildings, we proceed with our study by focusing on Seoul and neighboring areas (Gyeonggi-do). This study analyzes a total of 1,123 sales transactions of business units for seven years from 2011 to 2017, using the data on real transaction prices as provided by the Korea Appraisal Board. The results can be summarized as follows. According to the multiple regression analysis, the closer the center is to major facilities, such as trains, subway stations, shopping centers, etc. in the downtown, the higher is the value of the unit in Seoul. Also, a unit has a higher value in Seoul when it is relatively new, smaller, and located on a higher floor. In Gyeonggi-do, with regards to locational characteristics, the closer the unit is to the highway IC, railway or subway station, and downtown, the higher its value. When it comes to building characteristics, the higher the ratio of the gross floor area and supporting facilities, the higher is the value of the unit. Also, the lower the age of the building, the smaller the supply area, and the lower the living floor, the higher is the value of the business unit. 본 연구는 신산업용 집합건물인 지식산업센터의 가격결정에 관하여 수도권을 중심으로 연구를 진행하였다. 산업단지 내 입지하고 있는 지식산업센터의 공간적 구조에 차이가 있을 것으로 보아 서울과 경기를 구분하고 입지특성과 건물특성으로 세분하여, 가격결정요인을 분석하고 비교하였다. 2011년부터 2017년까지 국토교통부의 1,123개 실거래 매매사례 자료를 기초로 분석을 하였으며 결과는 다음과 같이 요약된다. 서울지역의 입지특성에서 도심거리, 철도지하철역거리, 쇼핑센터거리는 가까울수록 가격이 높았으며, 건물특성에서 경과연수는 낮을수록, 호실공급면적이 작을수록, 입주층은 높을수록 가격이 높았다. 시공사 브랜드가 비브랜드보다 가격이 높았으며, 제조업보다 비제조업의 가격경쟁력이 높게 분석되었다. 경기지역의 입지특성에서 고속IC거리, 도심거리, 철도지하철역거리가 가까울수록 가격이 높았으며, 건물특성에서 연면적과 지원시설은 비율이 높을수록 가격이 높았다. 또한 경과연수와 호실공급면적은 작을수록, 입주층은 낮을수록 가격이 높았다.

[Technical Summit Meeting in Korea Pulp and Paper Industry - Part 2] PCC 하이로딩을 위한 사이즈프레스 충전 및 복합충전제 적용기술 최적화

조병욱,원종명,김형진,남기영,김세종,김정섭 한국펄프·종이공학회 2015 한국펄프·종이공학회 학술발표논문집 Vol.2015 No.4

내열성 액정 고분자의 합성 및 복합재료

조병욱,전옥철,김윤준,한철,최재곤 조선대학교 생산기술연구소 1999 生産技術硏究 Vol.21 No.2

A new thermotropic liquid crystalline copolyester(TLCP) was synthesized by condensation polymerization of 2,6-naphthalene dicarbonyl chloride with the corresponding diol having a tetramethylene and a hexarnethylene group. The blends of the TLCP with PEN were prepared by the coprecipitation from a common solvent. The TLCP and blends (2, 5, 10 and 20wt% TLCP) were characterized in terms of their thermal, mechanical properties and morphology. The TLCP in the melt state showed nematic mesophase identified by thread-like optical texture. The glass transition temperature (T_(g)) and cold crystallization temperature (T_(c)) of PEN in the blends decreased with increasing the content of TLCP and the TLCP acted as anucleating agent for the matrix polymer. Interfacial adhesion between the TLCP and PEN seemed to be poor. The modulus of TLCP/PEN blends was enhanced as the TLCP content increased.

Thermotropic 폴리펩타이드

曺秉旭,權重根,崔香姬 조선대학교 생산기술연구소 1988 生産技術硏究 Vol.10 No.1

A series of poly(r-benzyl L-glutamate-co-L-leucine) were synthesized with various leucine contents, and the thermotropic mesophase properties of cholesterics were investigated, Dielectric measurements were performed on poly(r-benzyl L-glutamate-co-L-leucine) (copoly(BLG, Leu)) and poly(r-alkyl L-glutamate-co-L-leucine) (copoly(BLG, Leu)) in the solid state. The composition dependence of the dielectric behavior of these .copolymers was examined, It was found that the introduction of a Leu residue decreased the mobility of the benzyl L-glutamate side chain of copoly(BLG, Leu), while it increased the mobility of the alkyl L-glutamate side chain of copol (BLG, Leu). The results were interpreted in terms of the side chain interaction. The hydrophobic interaction between the benzene ring of the benzyl glutamate residue and the alkylgroup of the leucine residue is a possible cause for the decreases in mobility of copoly(BLG, Leu).

울릉도 추산용출소의 용출 특성

조병욱,이병대 한국지하수토양환경학회 2018 지하수토양환경 Vol.23 No.6

The source of Chusan Spring water in the Ulleungdo is the precipitation in the Nari caldera basin, which permeates in theTrachitic pumice and tuff area and moves downward, outflowing at the lithologic boundary between the trachyte and Narituff. It is known that the discharge rate of the Chusan Spring is large enough to be used for the small hydroelectric powergeneration, but the exact discharge rate and hydrogeologic characteristics have not been known. The discharge rates of theSpring were measured 11 times, which ranged from 15,220 m3/d to 36,278 m3/d. The discharge rates, measured by theautomatic level recorder, for two-year period, were 20,000~38,000 m3/d. The variation of discharge rates did not coincidewith rainfall event, but showed daily increases of 3,000~5,000 m3/d. The annual discharge rate excluding theevapotranspiration and the surrounding stream discharge corresponded to 70.6% of the annual precipitation of the rechargearea. Therefore, meteorological observations at the Nari basin, rather than the Ulleung-do meteorological station, are moreappropriate to properly interpret the discharge characteristics of the Chusam Spring and the recharge rate of the basin.