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N, K, Ca의 한정된 이온센서 이용을 전제로 한 순환식 수경재배에서 P, Mg의 조절 방법
최경이(Gyeong Lee Choi),여경환(Kyung Hwan Yeo),이한철(Han Cheol Rhee),이성찬(Seong Chan Lee),이중섭(Jung-Sup Lee),강남준(Nam Jun Kang),김학진(Hak Jin Kim),정대현(Dae Hyun Jung) 한국원예학회 2016 원예과학기술지 Vol.34 No.6
일반적인 순환식 수경재배에서는 배액을 원수로 희석하여 EC기준으로 제어하기 때문에 순환되는 배양액은 필연적으로 이온 불균형이 발생한다. 따라서 이 연구는 상용 가능성이 높은일부 이온센서(N, K, Ca)를 이용한다는 전제 하에 작물의 필수원소인 N, P, K, Ca, Mg를 이온 단위로 자동제어 할 수 있을지 검토하고자 수행하였다. 상추를 재료로 배양액 내 이온 흡수량을 2회 조사하여 양분흡수패턴과 흡수된 이온간의 흡수 상관관계를 분석하였다. PO₄는 N과, Ca는 Mg와 비슷한 흡수패턴을 나타났고 센서로 측정 가능한 이온들 중에서 PO₄는 N와 Ca는 Mg간의 상관계수도 가장 높았다. 회귀분석의 결과 도출된 N-PO₄간의 회귀계수는 두 번의 시험의 결과가 1.04와 0.55로 다르게 나타났으나 Ca-Mg는 0.35와 0.40으로 거의 유사한 수치를 나타내었다. 청경채, 장미를 이용하여 상관관계 적합성을 검증하고 더불어 작목확대 가능성을 검토하고자 추가 시험을 수행하였다. 청경채의 N-PO₄, Ca-Mg 이온간의 R2은 모두 0.86과 0.86이었고 장미는 각각 0.87, 0.73으로 이었다. 회귀계수는 청경채는 0.56, 0.24이고 장미는 0.51, 0.16이었다. 종합적으로 판단했을 때 N-PO₄는 상추에서 반복 시험간의 결과 일치하지는 않았음에도 전체적으로는 상추, 청경채, 장미가 회귀계수가 0.55~0.58로 유사하게 나타나 모든 작물에 공통적으로 적용 가능성이 있지만 Ca-Mg는 작물별로 다른 계수가 필요하다고 판단되었다. 순환식 수경재배에서 개별 이온의 실시간 제어를 위하여 센서와 장비 개발에 관한 연구가 지속적으로 이루어지겠지만 단기간에 이온제어가 실용화되기는 어려울 것으로 판단된다. 따라서 이 연구는 먼저 상용화 가능한 센서를 이용하여 상용화가 어려운 이온의 조절은 다른 방법으로 순환식 수경재배에서 꼭 해결되어야 할 과제에 접근하였다는데 의의가 있다. Recycling nutrient solutions in closed hydroponic production systems is usually accompanied by an imbalance of nutrient solutions when concentration is controlled according to electrical conductivity (EC) levels. This study investigated whether it was possible to automatically control the concentrations of five essential elements nitrogen (N), phosphorus (P), potassium (K), calcium (Ca) and magnesium (Mg) using only N, K and Ca ion sensors. N, P, K, Ca, and Mg uptake was measured in the nutrient solution, and relationships between absorbed ions were analyzed through twice-repeated experiments in lettuce. Results confirmed that the pattern of PO₄ ion uptake was similar that of N, and the pattern of Mg ion uptake was similar that of Ca. PO₄ ion uptake was most highly correlated with N, and Mg was most highly correlated with Ca. Regression coefficients of N and PO₄ were significantly different at 1.04 and 0.55, respectively, but were similar between Ca and Mg at 0.35 and 0.40, respectively. Additional experiments were conducted to measure nutrient uptake in pak choi and rose plants, both to confirm the results from the first experiment in lettuce, and to assess possible application to other crops. Coefficients of determination both for N and PO₄, and Ca and Mg were considerably high (R² = 0.86) in cultured pak choi, and similar results were observed in cultured rose (R² = 0.87 and 0.73, respectively). Regression coefficients for cultured pak choi were 0.56 and 0.24, respectively, and for rose were 0.51 and 0.16, respectively. Although the results obtained for N and PO₄ were not consistent between the lettuce experiments, N and PO₄ have similar regression coefficients for all crops. No common coefficient was found between Ca and Mg.
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최경도(Kyong-do Choi) 한국아메리카학회 2013 美國學論集 Vol.45 No.3
Henry James became a British citizen a year before he died in 1916. This had brought a controversial debate as to the motive of his decision to abandon his native land as well as United States citizenship. In American circles, James was criticized sharply. To many people in the U. S., James's decision was regarded as an act of disloyalty, a confirmation that James was "anti-American." However, James was thoroughly a cosmopolitan both in his life and writing. He was national in his choice of characters and subject since his characters were mostly Americans while his subject was concerned with the uniquely American experiences in Europe. James was at the same time international because the world of his novel predominantly depicts the intermingling of two different worlds on both sides of the Atlantic. As an American expatriate living in Europe, James was inevitably associated with the question of nationality. To James the question of national identity was crucial since his fiction shows a remarkable play of this issue, largely through the international theme. With their experiences in Europe, James's American characters were able to define their own national identity. James was transnational in an era when national boundaries were keenly felt to people in his age. Anticipating the cosmopolitanism of the expatriate writers in the 1920s, James performed his role as an international writer across the geopolitical boundaries. James made his readers undermine the physical and psychological conventions that define the nation as indivisible entity. After all, James's writings emphasize the human capability to learn from cultural, social, and national differences.
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최경은 ( Choi Kaung-eun ) 연세대학교 유럽사회문화연구소 2016 유럽사회문화 Vol.0 No.17
The old man who appears in the Old Testament has various functions and features. The signature silver hair and wisdom (the merit of old age) have colorful and positive manifestations in the Proverbs and Ecclesiasticus. The tone of the descriptions change in the later works. The Book of Job raises questions as to whether old men are truly sagacious, and such critical thinking leads to a completely new evaluation of the old man by the Book of Wisdom. The starting point of the case made in the Book of Wisdom is the untimely death of a good man. It becomes clear what role the destroyed `Tun-Ergehen-Zusammenhang`(correlation between action and leading a decent life) - a theme penetrating the Old Testament - has in assessing life. The correlation that is argued in the Proverbs fades in the midst of the distress of Job and the good man`s early death in the Book of Wisdom; age, silver hair, and wisdom do not necessarily have association anymore. The Book of Wisdom which was documented approximately a century before the birth of Christ reflects the views of the Greeks and the Romans of the time. One case in point is the `Consolation Literature` that was all the rage. In this sense, the Book of Wisdom is a fresh assessment of life in tandem with the times. Those who meet young deaths may reach the noble age and hold the dignify of the silver haired. The classical topos of the old man now has a new significance. In the New Testament, the old man and the old age appear in a completely different paradigm. Christ himself did not walk the Earth over thirty years. The key subject in Gospel is Resurrection. Having reached old age in this world no longer matters. The issue of age has been given a religious tone (from being a mundane matter), shifting how it is thought about - if it is mentioned at all.
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최경은 ( Kyung Eun Choi ) 연세대학교 유럽사회문화연구소 2009 유럽사회문화 Vol.2 No.-
Die vorliegende Arbeit untersucht das Migrantenbild in deutschen Filmen. Die untersuchten Filmen sind <Angst essen Seele auf>, <Yasemin>, <Dealer> und <Gegen die Wand>. In diesen Filmen spielen Migranten die Hauptrolle. Die Identitaten der vier Migrantenfiguren, namlich Ali, Yasemin, Can und Cahit in den ausgewahlten Filmen sind naturlich nicht reprasentativ fur die Konstruktion der Identitaten von Migranten im Deutschen Film im Allgemeinen. Dennoch weist diese Analyse bezogen auf die Entwicklung des Films im Verlauf der Jahrzente Tendenzen auf, die charakteristisch sind. Dies lasst zumindest die Sichtung einer Reihe von Migrationsfilmen von 1970 bis heute vermuten. Die durchgefuhrten Filmanalysen haben ergeben, dass alle vier Filme dem Genre Melodram zuzuordnen sind, auch wenn Handlung, thematische Schwerpunkte und die Art des Filmemachens grundverschieden sind. Ebenso ist das Basismuster der Figurenkonstellation in allen vier Filmen das gleiche, namlich ein Beziehungskonflikt zwischen zwei Personen. Außerdem sind alle vier Figuren, die analysiert werden, in untere soziale Schichten einzuordnen. In <Angst essen Seele auf> wird der Migrant noch als vollkommen ausgegrenzter, unglucklicher und fremder Mensch in einer ansonsten homogenen Gesellschaft dargestellt, die sich fremdenfeindlich prasentiert. In <Yasemin> wird die Figur eines turkisch-deutschen Madchens konstruiert, die sich den deutschen Werten und der Kultur angeglichen hat. Sie mOchte Arztin werden, kurze Rocke tragen und mit Jungs zusammen sein. In <Dealer> wird ein junger Familienvater gezeigt, der den Absprung aus der Illegalitat nicht schafft und keinerlei Bezug zu seiner Herkunftskultur hat. Er tragt lediglich noch einen turkischen Namen, ansonsten ist er vollstandig assimiliert. <Gegen die Wand> dagegen beschaftigt sich noch im hohen Maße mit kultureller Identitat. Cahits Ignoranz wird zum Thema gemacht, sein Umgang mit Sibels extrem konservativer Familie und im letzten Teil des Films seine Suche nach Identitat. Das Thema "``kulturelle Identitat" wird noch immer wissenschaftlich behandelt und in der Gesellschaft diskutiert. Globalisierung und Individualisierung sind Prozesse, die noch nicht abgeschlossen sind und wahrscheinlich nicht abgeschlossen sein werden, bevor man neue Begriffe fur sie findet.
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전통 문화와 최신 기술의 조화를 통한 실과 융합교육프로그램 개발
최경은(Choi, Kyeong Eun),배선아(Bae Seona) 학습자중심교과교육학회 2021 학습자중심교과교육연구 Vol.21 No.4
이 연구는 전통 문화와 최신 기술의 조화를 바탕으로 실과 융합교육프로그램을 개발하는데 목적이 있다. 연구의 목적을 달성하기 위하여 준비, 개발, 개선의 3단계 절차로 연구를 수행하였다. 준비 단계에서는 전통 문화와 실과교육의 관련성을 분석하여 융합교육프로그램의 기틀을 마련하였다. 개발 단계에서는 교육프로그램의 주제를 선정하고 교육목표 설정, 학습내용 선정 및 조직을 통해 총 30차시의 교육프로그램을 개발하였다. 개선 단계에서는 전문가 집단을 대상으로 타당도를 평가받고, 수정 보완하였다. 최종 개발된 교육프로그램은 다음과 같은 특징을 가진다. 첫째, 개발된 교육프로그램은 전통이 내포된 가정생활분야(의ㆍ식ㆍ주)의 내용 요소를 중심으로 AI, 로봇, SW, IoT, 3D 프린터, 드론 등 최신 기술을 활용하여 기능성과 유용성을 확장함으로써 전통 문화의 아날로그 감성과 최신 디지털 기술과의 조화와 융합을 추구하였다. 둘째, ‘21C 디지로그 기반 전통생활’을 주제로 ‘친환경 의생활’, ‘건강한 식생활’, ‘쾌적한 한옥 생활’, ‘안전한 공동체 생활’, ‘공유와 나눔 생활’ 등 5개의 하위 주제를 구성하였다. 셋째, 실천적이고 창의적인 노작ㆍ체험ㆍ실습 활동 중심의 30차시 교육프로그램을 개발하였다. 넷째, 학습자 수준, IT 기자재 보유 여부 등에 따라 학습 활동 선택과 활용이 가능하도록 하였다. The purpose of this study was to develop practical arts convergence education program by combining traditional culture and the latest technology. In order to achieve the objective, the study was conducted in three stages of preparation, development, and improvement. In the preparation stage, the correlation between traditional culture and practical arts education was analyzed to build a foundation for the convergence education program. Then in the development stage, the education program was developed by selecting the topic of the program, setting the educational goals, and selecting and organizing the learning content. Lastly, in the improvement stage, the validity of the program was assessed by a group of experts, after which the program was modified and supplemented. The final version of the education program have features as follows. First, the education program developed in this study focuses on content elements of home economics area that was related to tradition, while applying the latest technology such as AI, robots, SW, IoT, 3D printers, and drones to improve functionality and effectiveness. Through this, it was pursued to create a harmony between analog sentiment of traditional culture and the latest digital technology. Second, the program consists of a main topic of ‘Digilog Traditional Life in the 21st Century’ with five subtopics of ‘Eco-friendly Clothing & Textile Life’, ‘Healthy Dietary Life’, ‘Comfortable Housing Life in Hanok’, ‘Safe Community Life’, and ‘Sharing Life’. Third, the program was composed of 30-hours program that creative work, experience, and practice-oriented activities. Fourth, the program was designed to select and perform activities based on the student level or the availability of IT equipment.
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