웹 카메라를 이용한 시설 내 국화생산 광 환경 원격 모니터링

정선옥(Sun-Ok Chung),김용주(Yong-Joo Kim),이규호(Kyu-Ho Lee),성남석(Nam-Seok Sung),이철휘(Cheol-Hwi Lee),노현권(Hyun-Kwon Noh) 충남대학교 농업과학연구소 2015 농업과학연구 Vol.42 No.4

Increase of national family income improved demand of high-quality and year-round horticultural products including chrysanthemum. To meet these demand, farmers have introduced protected facilities, such as greenhouses, of which environmental conditions could be monitored and controlled. Environment management up to three weeks after transplanting is critical for chrysanthemum quality. Artificial lighting and light-blocking screen are especially important for long-day (day period > 13 hours) and short-day (night period > 13 hours) treatments. In this study, a web-camera was installed, and the image was obtained and transmitted to mobile phones to monitor the status of 3-wavelength(RGB) lighting environments. RGB pixel values were used to determine malfunctioning of the lighting lamps, and leaking out and incoming illumination status during short-day and long-day treatment periods. Normal lighting lamps provided RGB pixel values of 240~255. During long-day treatment period, G pixel values were useful to detect abnormal lighting conditions (e.g., leaking). During short-day treatment period, R pixel values were useful to determine incoming light (e.g., sun-light). Results of this study would provide useful information for remote monitoring of light conditions for protected chrysanthemum production under artificial lights.

Modeling of CO₂ Emission from Soil in Greenhouse

Lee, Dong-Hoon,Lee, Kyou-Seung,Choi, Chang-Hyun,Cho, Yong-Jin,Choi, Jong-Myoung,Chung, Sun-Ok Korean Society of Horticultural Science 2012 원예과학기술지 Vol.30 No.3

Greenhouse industry has been growing in many countries due to both the advantage of stable year-round crop production and increased demand for fresh vegetables. In greenhouse cultivation, $CO_2$ concentration plays an essential role in the photosynthesis process of crops. Continuous and accurate monitoring of $CO_2$ level in the greenhouse would improve profitability and reduce environmental impact, through optimum control of greenhouse $CO_2$ enrichment and efficient crop production, as compared with the conventional management practices without monitoring and control of $CO_2$ level. In this study, a mathematical model was developed to estimate the $CO_2$ emission from soil as affected by environmental factors in greenhouses. Among various model types evaluated, a linear regression model provided the best coefficient of determination. Selected predictor variables were solar radiation and relative humidity and exponential transformation of both. As a response variable in the model, the difference between $CO_2$ concentrations at the soil surface and 5-cm depth showed are latively strong relationship with the predictor variables. Segmented regression analysis showed that better models were obtained when the entire daily dataset was divided into segments of shorter time ranges, and best models were obtained for segmented data where more variability in solar radiation and humidity were present (i.e., after sun-rise, before sun-set) than other segments. To consider time delay in the response of $CO_2$ concentration, concept of time lag was implemented in the regression analysis. As a result, there was an improvement in the performance of the models as the coefficients of determination were 0.93 and 0.87 with segmented time frames for sun-rise and sun-set periods, respectively. Validation tests of the models to predict $CO_2$ emission from soil showed that the developed empirical model would be applicable to real-time monitoring and diagnosis of significant factors for $CO_2$ enrichment in a soil-based greenhouse.

Modeling of CO₂ Emission from Soil in Greenhouse

Dong Hoon Lee,Kyou Seung Lee,Chang Hyun Choi,Yong Jin Cho,Jong-Myoung Choi,Sun-Ok Chung 한국원예학회 2012 원예과학기술지 Vol.30 No.3

Greenhouse industry has been growing in many countries due to both the advantage of stable year-round crop production and increased demand for fresh vegetables. In greenhouse cultivation, CO₂ concentration plays an essential role in the photosynthesis process of crops. Continuous and accurate monitoring of CO₂ level in the greenhouse would improve profitability and reduce environmental impact, through optimum control of greenhouse CO₂ enrichment and efficient crop production, as compared with the conventional management practices without monitoring and control of CO₂ level. In this study, a mathematical model was developed to estimate the CO₂ emission from soil as affected by environmental factors in greenhouses. Among various model types evaluated, a linear regression model provided the best coefficient of determination. Selected predictor variables were solar radiation and relative humidity and exponential transformation of both. As a response variable in the model, the difference between CO₂ concentrations at the soil surface and 5-㎝ depth showed are latively strong relationship with the predictor variables. Segmented regression analysis showed that better models were obtained when the entire daily dataset was divided into segments of shorter time ranges, and best models were obtained for segmented data where more variability in solar radiation and humidity were present (i.e., after sun-rise, before sun-set) than other segments. To consider time delay in the response of CO₂ concentration, concept of time lag was implemented in the regression analysis. As a result, there was an improvement in the performance of the models as the coefficients of determination were 0.93 and 0.87 with segmented time frames for sun-rise and sun-set periods, respectively. Validation tests of the models to predict CO₂ emission from soil showed that the developed empirical model would be applicable to real-time monitoring and diagnosis of significant factors for CO₂ enrichment in a soil-based greenhouse.

스페인 현대 안달루시아 시학 연구

정선옥 서울大學校 스페인中南美硏究所 2004 이베로아메리카硏究 Vol.15 No.-

Desde el renacimiento habia la escuela sevillana que es una corriente de la li´rica espan~ola. En la poesia espan~ola del siglo XX tambie´n existe las caracteri´sticas de esta escuela poe´tica a las que denominamos la poe´tica andaluza. Ser andaluz, adema´s de otros elementos menores, deberia basarse esencialmente en la conciencia de andalucidad del que escribe expresada en la voluntariedad de ser andaluz, ya sea consciente o inconscientemente, la conciencia de nacionalidad, raza, lengua, accidentes geogra´ficos del entorno, la conciencia de la historia particular social y arti´stica, y la asimilacio´n de lo tradicional andaluz o por el contrario en el deseo de ruptura con dicha tradicio´n porque ruptura significari´a aqui conocimiento previo. A trave´s de las caracteristicas esenciales poe´ticas de los poetas andaluzas contempora´neas la poesia espan~ola se hace ma's abundante y profunda.

Linear Accelerator를 이용한 Stereotactic Radiosurgery

정상섭,윤도흠,오성훈,김선호,서창옥,추성실,노준규,김동익,서정호 대한신경외과학회 1988 Journal of Korean neurosurgical society Vol.17 No.6

A Modified irradiation technique utilizing a linear accelerator for radiation surgery within the brain was performed in 4 patients. Three of them had brain tumors and one small arteriovenous malformation in midbrain. A Hitchcock stereotactic apparatus and a 10 MeV linear accelerator have been adapted and special computer programs for dosimetry were obtained and studied experimentally with a phantom model. Stereotactic radiosurgery is a valuable tool in the treatment of inoperable, deep seated intracranial lesions, the major advantage being high efficacy and smoothness of the procedure, as well as short hospitalization times.

프랑코 시대의 스페인 여성 문학 연구

정선옥 서울대학교 라틴아메리카연구소 2007 이베로아메리카硏究 Vol.18 No.-

En las primeras e´pocas de los 1930 desarrolla mucho la historia femenina espan~ola porque las mujeres espan~oles consiguieron los derechos políticos como el de voto que era un acontecimiento simbo´lico. Pero la guerra civil y la era de Franco eran un tiempo desdichado no so´lo en la historia sino tambie´n en la historia femenina. Despue´s de la guerra civil casi todas las escritoras famosas partieron de su patria, por eso, las escritoras nuevas de Espan~a no tenía su modelo adecuada para su literatura y adema´s el gobierno franquista oprimio´ mucho la conciencia femenina liberal. Sin embargo, las escritoras como Carmen Laforet escribio´ su experiencia a trave´s de sus recuerdos. Con este punto de vista critico´ las sociedades autoritarias. Por las descripciones de su psicología íntima hizo esfuerzos por superar las censuras y expresar su identidad femenina.

ATM-MPLS 기반 초고속국가망서비스의 서비스품질 강화 방안

조정호,노선식,이형옥 한국정보사회진흥원 2005 정보화정책 Vol.12 No.4

정부는 초고속국가망 구축사업을 1995년부터 시작하여 2005년까지 완성하기로 하고, 2004년 말 기준으로 국가 및 지방자치 단체, 교육기관, 연구기관, 의료기관, 기타 공공기관으로 하여금 다양한 서비스를 저렴한 비용으로 이용할 수 있도록 추진하고 있다. 초고속국가망의 고품질 서비스 제공을 위해 도입한 ATM-MPLS망에서 서비스품질과 보안서비스 제공 방안을 제시한다. 이를 위해 먼저 초고속국가망사업의 서비스 동향과 단계별 사업 추진 내용을 알아보고, 다음으로 초고속국가망 사용자의 종단간 서비스품질을 제공하기 위한 서비스품질 제어방법을 제안한다. 마지막으로 초고속국가망에서 이용하는 MPLS VPN, Metro-ATM에서 종단간 서비스품질을 보장하는 방안을 제시한다. 이를 위해 ATM-MPLS 서비스, ATM-MPLS VPN 서비스, Metro-Ethernet 서비스의 기술 동향과 서비스품질을 보장할 수 있는 방안을 제시한다. 이러한 분석을 통해 초고속국가망의 서비스품질 정책과 서비스품질을 강화하기 위한 계획을 찾을 수 있다.

草鳥중 Aconitine계 Alkaloids의 定量

嚴東玉,李來洪,宣中基,都京三 又石大學校 1995 論文集 Vol.17 No.-

This study was undertaken to develope a method for the determination of aconitine alkaloids from Aconitum ciliare Tuber by spectrophotometry. The complex of cobalt(Ⅱ)ion and thiocyanate ion forms tetrathiocyanatocobaltate(Ⅱ)ion in aqueous solution containing an excess of thiocyanate ion. The tetrathiocyanatocobaltate(Ⅱ)ion produces the complex with aconitine alkaloids. The complex are extracted from aqueous solution to 1. 2-dichlorethane. A spectrophotometry for determination of aconitine alkaloids with tetrathiocyanatocobaltate(Ⅱ)ion were, established by 1, 2-dichlorethane extraction. Determination of aconitine standard was possible to the rage of 0.4-0.6㎎/㎖ in 1.2-dichlorethane. To examine the determination of aconitine alkaloids in Aconitum ciliare Tuber were determined by using acid-alkali titration, spectrophotometry from ether extracts. The average recovery of aconitine standard sloution was 97.9% and standard deviation 2.97%. As this method is accurate and precise, is applicable to the determination of aconitine alkaloids in Aconitum ciliare Tuber.

5인 미만 사업장에서 산업보건에 관한 사업주와 근로자의 인식, 지식 및 태도

권옥선,정치경 가톨릭대학교 산업의학센터 2001 韓國의 産業醫學 Vol.40 No.3

In order to investigate the awareness, knowledge and attitude on occupational health in small industry with less than 5 workers, the self-administered questionnaire survey was carried out on 194 employers and 310 employees in 194 industries. The results were as follows : 1.The most frequent type of industry was manufacturing(98.5%) and the industry with 1-2 workers occupied 69.0%. 2.The employers and employees recognized noise and dust as the most harmful factors. 3.The awareness rate for preventing occupational disease in employers was the highest in nothing can be done and followed by improvement of work environment and consciousness and knowledge of workers on health. Those in employees was the highest in improvement of work environment and followed by consciousness and knowledge of workers on health and interest and investment of employer on health. 4.Supplied rate of the protective equipment were 41.7% in employers and 38.1% in employees. 14.4% in employers and 9.7% in employees always wore the protective equipment and the reasons for not wearing protective equipment were inconvenient(30.4%), bothering(22.4%), not necessary(14.9%), not supplied(13.5%) in employers and employees. 5.The significant factors influencing the knowledge and attitude on occupational health were age, education level and monthly income in the point of knowledge, and monthly income in the point of attitude. If knowledge were considered as a dependent variable, knowledge is significant factor for attitude on occupational health.

Glow放電法에 의한 α-Si蒸着裝置의 製作과 그 試料의 特性

유동선,현옥배,고년규,황정남,정원모,이철주 연세대학교 자연과학연구소 1981 學術論文集 Vol.7 No.-

Glow방전법에 의해서 SiH_4를 분해하여 α-Si 박막을 얻을수 있는 장치를 제작하였다. 이 SiH_4기체는 수소기체속에서 10%로 희석되였으며, 진공방전함속에서 rf 전압에 의하여 분해된 Si는 유리기판위에 증착된다. α-Si박막은 1~1.6 A˚/sec의 증착율로 약 7000 A˚의 두께까지 증착되였다. α-Si 박막의 흡수계수는, 2.3 eV의 photon energy 영역에서 약 10^4 cm^-1이고, 그 optical gap은 약 2.1 eV였다. 이 박막의 증착율은 전극간격에 따라 변하고 있으나, 최적전극간격과 기체유입량은 각각 2.6cm와 1~2cc/min였다. Apparatus capable of producing α-Si film by the glow discharge method was designed and constructed in this study. The monosilane gas which is diluted in H_2 gas to 10% is decomposed in the reaction chamber by rf oscillation. The apparatus is composed of a reaction chamber, a rf generator, a cooling system, etc. The α-Si thin film is produced at a deposition rate of 1~1.6 A˚/sec to a thickness of about 7000 A˚. Its absorption coefficient is about 10^4 cm^-1 in the photon energy region of ~2.3 eV, and its optical gap is about 2.1 eV. The deposition rate for the film is controlled by varying the distance between electrode and substrate. The optimum distance and gas flow is about 2.6 cm and 1~2 cc/min, respectively.