c-형강 및 ebb & flow 방식에 따른 경제성 분석

강승원(Seung Won Kang),박천호(Chun Ho Pak),조용성(Yong Sung Cho) 한국원예학회 2007 원예과학기술지 Vol.25 No.3

관비재배와 저면관수인 ebb & flow, C-형강의 재배방식에 따른 고품질분화 생산을 위한 재배농가의 경제성을 분석하였다. 이를 위해 화훼농가의 비용구조를 분석하였고 자본 회수기간 및 내부수익률의 추정, 관수에 따른 인건비 절감 효과를 분석하여 재배방식에 따른 경제성을 비교하였다. 10a(991.7m²) 규모의 자동온실에 대해 관비재배방식을 선택한 시클라멘 재배농가의 총 비용은 9,993.8만원으로 추정되며, 이 중 시설비는 74%(7,410만원)를 점하고 연간 2,583.8만원의 경영비를 지출할 것으로 예상된다. 반면, C-형강방식을 선택한 재배농가는 초기 시설비용으로 약 8,520.0만원(총비용의 약 70%)을 지출하고, 매년 경영비로 3,597.0만원을 지출할 것으로 추정된다. 한편, 투자자금에 대한 자본회수 기간을 분석한 결과 10a 규모의 자동온실에서 시클라멘을 재배하는 농가에서 관비재배방식 혹은 C-형강방식을 선택할 경우에는 초기시설투자비 회수기간이 약 4 년 정도 소요될 것으로 예측되며, ebb & flow 방식을 선택할 경우에는 약 5년 정도의 시간이 소요될 것으로 예상된다. 또한, 내부 수익률을 추정한 결과 ebb & flow시설과 C-형강시설을 5년과 6년씩 사용한다고 가정할 경우, ebb & flow시설의 내부 수익률은 각각 9%와 14%로 나타났고, C-형강시설의 경우에는 각각 13%와 17%로 나타나 시중의 저축성예금 수신금리 4.82%와 비교하여 경제성이 높은 것으로 분석되었다. Economical efficiency for production of high quality-potted plants was analyzed by types of irrigation system such as conventional fertigation, ebb & flow, and C-channel as subirrigation systems. After cost structure was analyzed, payback period of capital, internal rate return (IRR), and effects of reduced labor cost were estimated. The gross cost of cyclamen-producing farmers using hydroponic systems in automated greenhouses (10a) was about 100 million won. Of the gross cost, installation and operation costs occupied 74% and 25%, respectively. In the C-channel subirrigation system, gross cost was 120 million won approximately. Installation and operation costs occupied 70% and 30%, respectively. Payback period of capital was 4 years for fertigated irrigation and C-channel subirrigation system, whereas it was 5 years for ebb & flow. IRR of ebb & flow and C-channel subirrigation systems was higher than the interest rates of 4.82%, indicating economic efficiency.

한국 주요정신장애의 유병률 및 관련요인 : 2006 전국정신질환역학조사

조맹제,장성만,함봉진,정인원,배안,이영문,안준호,원승희,손정우,홍진표,배재남,이동우,조성진,박종익,이준영,김진영,전홍진,이해우 大韓神經精神醫學會 2009 신경정신의학 Vol.48 No.3

Objectives The aims of this study are to estimate the prevalence of the DSM-IV psychiatric disorders in the Korean population using the Korean version of Composite International Diagnostic Interview (K-CIDI), and to compare those with previous studies. Methods The Korean Epidemiologic Catchment Area study Replication (KECA-R) was Conducted between August 2006 and April 2007. The sampling of the subjects was carried out across 12 catchment areas. A multistage, cluster sampling design was adopted. The target Population included all eligible residents aged 181o 64 years. Face-to-face interviews were conducted with the Korean version of Composite International Diagnostic Interview (K-CIDI) based on the DSM-IV (N=6,510, response rate=81.7%). Results A total of 6,510 participants completed the interview. The lifetime and 12-month prevalence rates for all types of DSM-IV disorders were 30.0% and 17.3%, respectively. Those of Specific disorders were as follows : 1) alcohol use disorder, 16.2% and 5.6% ; 2) nicotine use disorder, 9.0% and 6.0% ; 3) specific phobia, 3.8% and 3.4% ; 4) major depressive disorder, 5.6% and 2.5% ; and 5) generalized anxiety disorder, 1.6% and 0.8%. Data relating to nicotine and alcohol use disorder revealed a very high male/female ratio. Mood disorder and anxiety disorder were more prevalent among females than males. Conclusion The prevalence of psychiatric disorders was high. In comparison with other studies, remarkable differences in the distribution of psychiatric disorders across the country and times were observed.

지역별 농지가격의 변동 : 그 요인과 영향

조재환,강승원 우송대학교 1997 우송대학교 논문집 Vol.2 No.-

The objective of this study is to find out the regional farmland price determination factors and their effects on farmland price fluctuatio. The study analyzes the long run equilibrium relationship and the innovation accounting analysis of regional farmland prices and its determinating factors. This empirical result will be helpful to set up the Farmland Utilization Inprovement Program for Korean agricltural structural adjustment in the future.

'PRO/II with PROVISION' 범용성 화학공정 모사기를 이용한 원유정제공정의 모사에 관한 연구

조정호,전종기,한원희,고승태,노상균 동양대학교 2001 동양대학교 논문집 Vol.7 No.1

Crude refinery unit is the first step in refining crude oil.Crude refinery unit is divided into the following two parts.The first par is atmospheric crude distillation column and crude preheating train.Because of the massive furnace duty to heat crude oil for distillation most units have an elaborate preheat train, in which the crude oil is preheated by back exchange with hot pumparound liquids from the unit.The other part is composed of the vacuum distillation unit.In this study, a step-by-step procedure for simulating an atmospheric crude distillation column by using PRO/II with PROVISION as a general purpose chemical process simulator is introduced.

한국산 육서사류(陸棲蛇類)의 조충류 감염상태

조승열,송기원,이순형 중앙대학교 의과대학 의과학연구소 1982 中央醫大誌 Vol.7 No.4

One hundred Korean terrestial snakes,i.e.,7 Elaphe rufodorsata,17 E. dione, 10 Dinodon rufozonatum rufozatum,37 Natrix tigrina lateralis,21 Agkistrodon blomhoffii brevicaudus,6A.calibinosus and 2A. saxatiilis were examined from June 17, 1981 to Jun 1, 1982, to observe the fauna of Korean cestode parasities. They were collected from 13 localities of southern Korea: i.e., Chunseong Gun, Hong-cheon Gun, Hoengseong Gun, Weonseong Gun, Samcheog Gun, Gangweon Do; Namyangju Gun, PAju Gun, Ganghwa Gun, Gyeonggi Do; Youngdong Gun, Jeweon Gun, Chungcheongbug Do; Jangheung Gun, Jeonlanam Do; Sancheong Gun, Gyeongsangam Do and Bugjeju Gun, Jeju Do respectively. The results could be summarized as follows: 1. A total of 61 snakes was found to be infected withsparganum larvae of Spirometra mansoni out of 100 examined. Snakes from 11 localities were infected. By species of snake, N.t. lateralis and A.b. brevicaudus showed the higher infection rates. The mean density was 11.0 per examined snake and 18.1 per infected snake respectively. A. caliginosus and A. saxatilis were new hosts of spatganum in Korea. 2. Trtrathyridium of Mesocestoides sp. was found in one snake, Elaphe rufodorsala collected from ChunSeong Gun, Gangweon Do. A total of 16 tetrathyridia was found at serosa and mesemtery of the snake. The morphology of the larvae was described. This was thr first record of recovery of thtrathyridia in any vertebrate intermediate host in Korea. Elaphe rufodorsata was a new host. 3. proteocephalus japonensis(Yamaguti, 1935) n.comb.(syn.: Ophiotaenia Japonensis Yamaguti, 1935) were found in 10 snakes which were collected from Hongcheon Gun, Weonseong Gun, Namyangju Gun, Paju Gun, Jeweon Gun, and Sancheong Gun repectively. The infected snakes were Agkistrodon blomhoffii brevicaudus, A. caliginosus, A. saxatilis and Natrix tigrina lateralis. The habit was small instetine. The measurement data and morpholigy were described. The preaently observed worms were longer than those of original description and was a difference in mumber of uteerine branches. A. blomhoffii brevicaudus, A. caliginosus, A. saxatilis were new hosts for this protecephalid cestode. Korea was added to list of the locality.

동방결절의 부위별 전기적 특성에 미치는 Higenamine의 효과

조규석,방효원,조성일,엄대용,이상돈 중앙대학교 의과대학 의과학연구소 1986 中央醫大誌 Vol.11 No.2

The effects of higenamine on the membrane potential of the central and peripheral areas of the rabbit sino-atrial node which were two small electrically insulated partitions, 0.5X0.5mm in sizes were recorded by 3M KCl-filled glass microelectrodes. The following results were obtained: 1. In the central and peripheral areas, the spontaneous firing frequencies were all increased with the increment of the higenamine concentration from 5X10^-8M/L to 10^-6M/L. 2. Higenamine showed positive chronotropy in the central and peripheral areas which were different to those in the high outside calcium concentrations. 3. After pretreating the preparations with 5X10^-7gm/m of tetrodotoxin(T.T.X.) which revealed the reduction in spontaneous firing frequency maximum diastolic potential(M,D.P) and overshoot, higenamine restored the frequency in the central area and the notch of the overshoot in the peripheral area. The above resu1ts could be regarded that higenamine showed some findings of enhanced sodium current although it would not be so specific in the effects to the ionic currents underlying the spontaneous firing frequencies in the rabbit sino-atrial node.

고온 리튬용융염계에서 오스테나이트 스테인레스강의 부식거동

조수행,홍순석,오승철,박성원 한국공업화학회 2003 응용화학 Vol.7 No.2

In the development of the advanced spent fuel management process based on the molten salt technology, it is essential to choose the optimum material for the process equipment handling molten salt. As a part of assessment and application of the structural material for the molten salt handling system, corrosion behavior of 304, 304L and 316LN in the molten salts was investigated. Corrosion proceeded via three steps; the formation step on corrosion product in which rapid corrosion takes place until stable corrosion product is formed after the beginning of corrosion, the protection step against corrosion until breakaway occurs after the formation step of stable corrosion product and the advancing step of corrosion after the breakaway. In a molten salt of LiCl-8%Li₂O, the final oxide scales of Li₂Ni_(8)O_(10) were formed, and also Li₂Ni_(8)O_(10) in the molten salt of LiCl-8%Li₂O-1%Li_3N.

고온 리튬용융염에서 오스테나이크계 합금의 부식거동

조수행,홍순석,오승철,박성원 한국공업화학회 2004 응용화학 Vol.8 No.1

In the development of the advanced spent fuel management process based on the molten salt technology, it is essential to choose the optimum material for the process equipment handing molten salt. As a part of assessment and application of the structural material for the molten salt handing system, corrosion behavior of Fe-base and Ni-base alloys in the molten salts was investigated in the temperature range of 650~800℃. Ni-base alloys showed of FeCr₂O₄ and Cr₂O₃ were formed in the Fe-abse alloys, also, NiFe₂O₄ and Cr₂O₃ in the Ni-base alloys. Fe-base alloys showed uniform and intergranular corrosion behavior and Ni-base alloys showed uniform and localized corrosion behavior.

평균기울기법에 의한 Al 2024-T3합금의 X선 반가폭과 피로수명비의 관계

조석수,박승용,김득진,장득렬,주원식 東亞大學校 大學院 1998 大學院論文集 Vol.23 No.-

In order to predict the fatigue life fraction for Al 2024-T3, in-plane bending fatigue test and X-ray diffraction techniques was carried out. The relation between fatigue damage on the specimen surface and half-value breadth of X-ray diffracton lines was investigated in the process of cyclic loading. This paper proposed the estimation of fatigue life using AGM(Average Gradient Method) by the Gradient on the basis of B/Bo and log N/Nf.

청신경종의 크기에 따른 어지러움의 양상 및 전정기능 검사의 특징

정원호,홍성화,조양선,김성민,장병찬,최재연,이승진 대한이비인후과학회 2000 대한이비인후과학회지 두경부외과학 Vol.43 No.1