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논문 : 정보처리 및 복합기술 ; 광반사를 이용한 한국 논 토양 특성 추정
정선옥 ( S. O Chung ),정기열 ( K. Y. Jung ),( Kenneth A. Sudduth ) 한국농업기계학회 2011 바이오시스템공학 Vol.36 No.1
An optical sensing approach based on diffuse reflectance has shown potential for rapid and reliable on-site estimation of soil properties. Important sensing ranges and the resulting regression models useful for soil property estimation have been reported. In this study, a similar approach was applied to investigate the potential of reflectance sensing in estimating soil properties for Korean paddy fields. Soil cores up to a 65-cm depth were collected from 42 paddy fields representing 14 distinct soil series that account for 74% of the total Korean paddy field area. These were analyzed in the laboratory for several important physical and chemical properties. Using air-dried, sieved soil samples, reflectance data were obtained from 350 to 2500 nm on a 3 nm sampling interval with a laboratory spectrometer. Calibrations were developed using partial least squares (PLS) regression, and wavelength bands important for estimating the measured soil properties were identified. PLS regression provided good estimations of Mg (R2=0.80), Ca (R2=0.77), and total C (R2=0.92); fair estimations of pH, EC, P2O5, K, Na, sand, silt, and clay (R2 = 0.59 to 0.72); and poor estimation of total N. Many wavelengths selected for estimation of the soil properties were identical or similar for multiple soil properties. More important wavelengths were selected in the visible-short NIR range (350-1000 nm) and the long NIR range (1800-2500 nm) than in the intermediate NIR range (1000-1800 nm). These results will be useful for design and application of in-situ close range sensors for paddy field soil properties.
정선옥 ( Sun Ok Chung ) 한국스페인어문학회 2003 스페인어문학 Vol.0 No.26
El primer tercio del siglo XX es un peri´odo de fecunda renovacio´n teatral que supone una vuelta, imitatio creativa, al pasado. Este estudio trata sobre una de las formas teatrales ma´s singulares cultivadas en el siglo XX: la farsa. Ge´nero de indudable origen carnavalesco, la farsa ofrece al estudioso una interesante evolucio´n, desde sus primeras manifestaciones en el a´mbito roma´ntico (Espan~a, Portugal, Francia, Italia), pasando por la《Commedia dell`arte》 italiana, y ma´s adelante el tratamiento por los grandes autores del los siglos XVII y XVIII. (Cervantes, Shakespeare, Molie`re, Goldoni) A primeros de este siglo la farsa se situ´a en el centro del espi´ritu renovador del teatro modemo. Toda una serie de diferentes movimientos este´ticos -modernismo, expresionismo y la vanguardia en general- otorgan a la farsa y a la risa una importancia extraordinaria, cuyas causas y consecuencias son objeto de este estudio. Los autores ilustres del primer tercio del siglo XX vuelven sus ojos a《el tinglado de la antigua farsa》. En las obras teatrales farsescos de Benavente, Grau, Valle-Incla´n, Lorca podemos extraer los caracteri´sticos de la farsa contempora´nea. Los autores tiene conciencia clara de la farsa y la funcio´n carnavalesca de la risa. Adema´s ellos pueden criticar directamente a la sociedad y al teatro de su tiempo por la risa de la farsa.
우울한 나르시스의 세상읽기 - 베께르 시학의 현대성 -
정선옥 ( Sun Ok Chung ) 한국스페인어문학회 2002 스페인어문학 Vol.0 No.25
La poesi´a de Be´cquer lo constituye, a juicio de Juan Ramo´n Jime´nez, en roma´ntico absoluto, refugiado en las grandes soledades del amor y la belleza. Es figura angular que llena buena parte de la poesi´a de la segunda mitad del siglo XIX, pero que deja sentir su presencia casi hasta nuestros di´as. Cualquier reflexio´n sobre las ideas poe´ticas de la contemporaneidad literaria espan~ola ha de partir necesariamente de Be´cquer. Ante todo, es un poeta que renueva la poesi´a espan~ola de su tiempo. y que expresa en diversas ocasiones su idea de la poesi´a; es decir, su poe´tica especialmente en Rimas y Cartas literarias a una mujer. En este trabajo hemos estudiado la contemporaneidad de Ia poe´tica de Be´cquer. y en e´l hemos considerado los siguientes apartados. Primero, el poeta nos muestra la reflexio´n sobre su propio quehacer que es uno de los si´ntomas ma´s importantes de nuestro tiempo. Segundo, Be´cquer piensa que el poeta necesita para crear ciertas notas que son propias de la mujer. Por eso en la Rimas, expresa Poesia eres tu. En este caso tu´ no significa la mujer concreta de su vida sino el a´nima del propio poeta. Refleja adema´s la esquizofrenia moderna del ego. Tercero. e´l distingue entre el poeta en trance y el poeta-escritor. Nos indica que el problema de lenguaje. Con estos tres puntos de vista sobre la poesi´a de Be´cquer podemos denominarlo el primer poeta espan˝ol contempora´neo. Como los grandes cla´sicos, Be´cquer, siendo fiel a su e´poca. fue capaz de tracenderla y plantear temas y formas de vigencia perenne. Segu´n las palabras de Luis Rosales el poeta sevillano es maestro para manana. maestro para siempre.
광 조건에 따른 식물공장 재배 쌈 배추의 기능성 성분 변화
정선옥(Sun-Ok Chung),김연미(Yun-Mi Kim),류동기(Dong-Gi Ryu),김선주(Sun-Ju Kim),박종태(Jong-Tae Park) 한국식품과학회 2014 한국식품과학회지 Vol.46 No.4
최근 육종되어 시장에 소개된 신홍쌈 배추를 다양한 광 조건의 식물공장에서 재배하여 그 영양적 특성, 특히 기능성 물질인 phenolic compounds류의 함량을 중심으로 비교분석을 수행하였다. LED 광원을 이용하였으며 LED는 적+청, 적+백, 적+청+백 세가지 조합으로 신홍쌈 재배에 사용하였고 형광등을 광원으로 이용하여 재배한 경우와 비교하였다. LED 적+청 조건에서는 배추가 정상적으로 성장하지 못하여 성분 분석연구에 사용하지 않았으며 형광등을 포함한 다른 광 조건에서는 서로 유사한 성장속도를 보였으며 정상적인 형태 및 크기로 성장하였다. Anthocyanidin중에서는 cyanidin만이 배추 내에 축적되었으며 그 함량은 LED조건이 형광등에 비하여 2배 이상 높은 것으로 나타났다. Phenolic acid와 flavonol의 총 함량은 광 조건에 따른 차이가 크게 나타나지 않았다. 특이하게도 caffeic acid는 형광등 조건에서는 거의 축적되지 않았으나 LED 광에서는 형광등 재배 배추에 비하여 70-160배 이상의 높은 함량을 나타내었다. 유리 아미노산과 유리당의 전체 함량은 대체로 LED 광 조건에서 높게 측정되었으나 그 차이는 크지 않았다. 결론적으로, LED 광 중 R+W 조합이 신홍쌈의 기능성 성분 축적 및 식품적 가치상승에 가장 유리한 것으로 나타났다. A recently developed Chinese cabbage cultivar, Shinhong Ssam, was cultured under different light conditions at a plant factory to evaluate effects of light on the production of functional compounds. The effects of the following combinations of red (R), blue (B), and white (W) LED light were compared to that of fluorescent light: R+B, R+W, and R+B+W. Under R+B light, the Chinese cabbage failed to grow well. In contrast, under R+W, R+B+W, and fluorescent light conditions, cabbages had similar growth rates. Cyanidin, the only anthocyanidin detected, accumulated in cabbages under LED conditions to levels more than 2-fold of that in cabbages grown under fluorescent light. Phenolic acid and flavonol levels varied subtly, whereas caffeic acid was found to be between 70- and 160-fold greater in LED-illuminated cabbages than in those exposed to fluorescent light. The amounts of free amino acids and sugars that affect the taste of vegetables were greater in the cabbages exposed to LED light than in those grown under fluorescent light conditions. In conclusion, R+W LED light produced Shinhong Ssam with greater nutritional value than those grown under R+B+W LED and fluorescent lights.
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.