• The Science & Technology
• /
• v.32 no.1 s.356
• /
• pp.14-15
• /
• 1999

97년 2월 복제양 '돌리'의 탄생이 전세계를 경악시킨 이후 지난해 11월엔 인간의 세포핵을 소의 난자에 이식시켜 배양하는데 성공함으로써 반인반수의 시대가 열렸다. 최근 생명공학기술개발에 따른 안전과 윤리를 문제삼는 환경단체ㆍ소비자단체ㆍ종교단체들이 반대운동에 앞장서고 있다. 그러나 과학기술계에선 이같은 반대가 생명공학에 대한 무지나 오해에서 비롯된 것이라고 일축하고 있다. 이러한 논쟁을 조정하고 과학기술정책을 결정할 때는 시민을 대화의 상대와 의사결정의 주체로 하는 '합의회의'방식을 도입하는 것이 바람직하다.

• TTA Journal
• /
• s.133
• /
• pp.42-43
• /
• 2011

영화 속에 등장하는 방사선은 평범한 파충류를 거대한 괴물 고질라로 만들거나 사람을 녹색 괴물 헐크로 만들어 버린다. 또한 언론에 비친 방사선은 마치 '살인 광선'처럼 우리 주변에서 가장 멀리해야할 것으로 비춰지고 있다. 최근의 한 드라마에서는 국익을 위해 신형 원자로 전문가를 서로 납치하기 위해 정보기관들 끼리 치열한 첩보전을 벌이는 내용이 나오기는 했지만 여전히 방사선에 대한 이미지는 부정적이다. 하지만 알려진 것과 달리 방사선은 수많은 사람의 목숨을 살리는 '생명의 빛'이기도 하다. 그렇다면 방사선이 어떻게 생명을 살리는데 도움을 줄 수 있는 것일까?

• Proceedings of the Korean Institute of Intelligent Systems Conference
• /
• 2001.05a
• /
• pp.257-260
• /
• 2001

일반적으로 기계학습은 교사신호의 유무에 따라 교사학습과 비교사학습, 그리고 간접교사에 의한 강화학습으로 분류할 수 있다. 강화학습이란 용어는 원래 실험 심리학에서 동물의 학습방법 연구에서 비롯되었으나, 최근에는 공학 특히 인공생명분야에서 뉴럴 네트워크의 학습 알고리즘으로 많은 관심을 끌고 있다. 강화학습은 제어기 또는 에이전트의 행동에 대한 보상을 최대화하는 상태-행동 규칙이나 행동발생 전략을 찾아내는 것이다. 본 논문에서는 최근 많이 연구되고 있는 강화학습의 방법과 연구동향을 소개하고, 특히 인공생명 연구에 있어서 강하학습의 중요성을 역설한다.

• Journal of Life Science
• /
• v.4 no.3
• /
• pp.113-118
• /
• 1994

유산균의 증식으로 인해 설사 등의 원인인 유해균들의 증식이 억제되는데 이것은 유산균들이 만드는 각종 유기산들, 과산화수소에 의한 직접적인 저해나 산생성에 부수되는 pH 저하가 원인이고 그 외 유산균들이 만드는 nisin이나 각종 bacteriocin 등도 관여한다. 유산균을 이용한 발효 유제품이 소비증가, 유산균의 약리작용 효과를 이용한 건강보조식품의 개발 등을 통하여 유산균의 중요성은 더욱 대두되고 있다. 이 같은 추세로 전세계적으로 유산균에 대한 연구가 활발히 진행되고 있으며, 최근에는 생명공학 분야에서 광범위하게 이용되고 있는 유전공학 기술에 의한 유산균의 개발연구가 관심을 모으고 있다. 본 논문에서는 현재까지 진행되고 있는 유산균 연구 중 유전공학기술을 이용한 연구결과와 이 분야의 향후 전망 등에 대하여 고찰하였다.

• Proceedings of the Korean Society of Crop Science Conference
• /
• 2019.09a
• /
• pp.201-201
• /
• 2019

• Journal of Korean Society on Water Environment
• /
• v.27 no.6
• /
• pp.776-783
• /
• 2011

In a natural water body, a useful ecotechnology to reduce standing crops of phytoplankton is to strengthen the top-down force of zooplankton. However, the predation of fish for zooplankton can make the force weak. This study was conducted to find out the effect of fish on the grazing pressure of zooplankton in the mesocosms established in a eutrophic stream (Kyongan Stream) from October to November in 2010. In the corral with fish, chlorophyll a concentration increased, and a small size cladoceran Bosmina longirostris was dominant. In the corral without fish, chlorophyll a concentration decreased along with the domination of a large cladoceran Daphnia galeata and a large copepod Eudiaptomus japonicus. The size-selective predation of fish appeared to miniaturize the zooplankton community, to narrow their food-size spectrum, and to weaken the top-down force.

• Journal of Mushroom
• /
• v.21 no.4
• /
• pp.195-199
• /
• 2023

The fungus Alternaria alternata, responsible for causing brown to black spotting on numerous fruits and vegetables globally, was identified in 2022 as the causative pathogen of brown spot disease in potatoes in Korea. In pursuing potential inhibitors against A. alternata growth, we evaluated 15 mushroom culture filtrates: eight from Trametes spp. and seven from Polyporus spp., known for their antibacterial and anticancer properties. Antifungal activity was assessed by exposing each filtrate to A. alternata on a paper disc. Four filtrates displayed inhibitory action against the fungus, albeit with mild effects. Our findings highlight the potential of Trametes and Polyporus fungi as emerging antifungal candidates, offering promise in preventing potato brown spots.

• Journal of the Daesoon Academy of Sciences
• /
• v.45
• /
• pp.1-35
• /
• 2023

This study aims at determining the meaning of Life in The Canonical Scripture of the Daesoon Thought upon the ontological bases of occidental philosophies; especially upon those of Plato and Bergson. In western philosophy, the word ontology designates investigating the meanings of being, which is derived from the Greek 'onto (being)' and 'logia (logical discourse).' The various meanings of life have been sought from ancient times all over the world, for these are the critical and vital questions that pertain to the nature of human existence. Plato had asserted that life, in his word, soul, had three different kinds of aspects of meaning. Immortal, reciprocal, and divine. Plato scheme was such that the soul could die, but after death it could became reborn into another various forms of living creatures. The real inner life of humans, the soul, would live eternally. Henri-Louis Bergson, a famous French philosopher from the 20^th century, claimed that life had three different kinds of aspects. Self-identity, Élan vital (vital impetus) and liberty. Bergson insisted especially the real meaning of life had been characterized by "unité multiple et multiplicitéune," "unity as something multiple and multiplicity something singular." The meaning of life in Daesoon Thought could be said to have three different characteristics, solidarity, earthly immortality and grievance-resolution. Some similarities can be found between certain western ontological meanings of life and those of Daesoon Thought. Namely, the qualities of eternity, reciprocity, and divinity.

• Journal of the Daesoon Academy of Sciences
• /
• v.33
• /
• pp.319-349
• /
• 2019

This study aims to elucidate the origin and yield of life and its characteristics and purpose in Daesoon Thought. Thereby, Taegeuk (the Great Ultimate) and Sangje (the Supreme God) have been deemed the source and ontology of life. The structure of each living creature is explained through reason (理), energy (氣) and spirit (神). In addition, through vital reason and living energy, the purpose of life makes the realization of the benevolent characteristics of life possible through the mind of Sangje. This line of research is unique among currently available research views of life as it perceives the spirit to be an ontological entity with functions and interactive engagement. By way of contrast, prior research suggests that spirit is life itself and includes it in the category of life and death. The Daesoon view of life is unique in that it is somewhat influenced by ontology and developmental theories from Confucianism, yet the concept of divine beings suggests a humanistic Sangje, who presides over the Great Ultimate. The realization of reason in this model is rather thought-provoking. Humans, just like other living things, are born with vital essence and function and interact as a main source to preside over the innate spirits inside themselves. Humans take responsibility for a certain sphere in the Three Realms that make up the world. They are also recognized as a significant feature in the world. Such an idea in Daesoon Thought depicts that 'the enshrinement of spirit into human being (神封於人),' follows Heaven and Earth. This is done to rectify humans in order to meet the needs of the universe and ultimately establish the era of the enshrinement of spirits into human beings. As for humanity, this possibility exists because of the spirits contained within their inner-selves. When cultivating oneself, humans and outer spirits actively interact with each other. This is likely to cause changes in a human's constitution and characteristics. In the end, one can be enshrined with corresponding divine beings according to one's degree of cultivation. Humans are born through the command of Sangje and the accomplishments of their ancestors as well as the energy of the universe. Present day humans encounter the era of human nobility and the era of humankind's divine salvation. Thereby, the purpose of human life is to contribute to the universe. To achieve this goal, the most important thing is to wholly realize that one's nature and reason were endowed by Heaven, which emerged from virtuous conduct in society. This is also akin to the movement of reason in Jeungsanist Thought. Sangsaeng (mutual beneficence) among oneself and others and between human beings and divine beings can be completed through the resolution of grievances for mutual beneficence and the grateful reciprocation of favors for mutual beneficence. If one accomplishes the perfected state of one's own nature and reveals it wholly, then one will be fully able to interact with spirits and reach the state of the human nobility.

• Journal of Science Education
• /
• v.37 no.3
• /
• pp.446-457
• /
• 2013

The 2009 Revised National Curriculum introduces plans for the "intensive course completion system". This study investigated students' learning satisfaction with and perceptions of Life Science in the humanities and social science course in general high schools according to the implementation of the intensive course completion system in the 2009 Revised National Curriculum, and analyze relations with gender and with academic achievement levels. The findings are as follows: First, the students in the humanities and social science course recorded an overall low learning satisfaction in Life Science through the intensive course completion system. It was analyzed that they especially found it burdensome to take the lessons four hours per week in one semester according to the system. Second, the students in the humanities and social science course didn't have positive perceptions of a need to study Life Science when considering their future career choices, but they positively perceived when considering its educational benefits. Third, the more learning satisfaction with Life Science they had according to the intensive course completion system, the higher learning perceptions they had. Finally, the girls showed a higher level of learning satisfaction and perception than the boys. The higher their academic achievement was, the higher their learning satisfaction and perception level became.