컴퓨터와 개인능력

민경현,Min, Gyeong-Hyeon 한국IT전문가협회 1987 소프트웨어세계 Vol.1 No.-

바이오잉크를 이용한 3차원 세포 프린팅 공정 기술 개발

민경현(Kyung-Hyun Min),안근선(Geunseon Ahn),김민경(Minkyung Kim),윤원수(Won-Soo Yun),심진형(Jin-Hyung Shim) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.05

쉴라 피츠패트릭, 일상사 연구로 러시아 역사학의 지평을 넓히다

민경현(Min Kyung Hyun) 역사비평사 2008 역사비평 Vol.- No.84

Sheila Fitzpatrick, one of the most famous historians, is still active in the study of Russian history in USA. She can be categorized as the second generation revisionist historian in the study of Stalinism. Above all, she has contributed to extend the prospect of Russian history through her inquiries into the history of everyday life. When the traditional school and revisionists came to a stalemate without finding a way forward for soviet studies after the collapse of Soviet Union, Fitzpatrick played a role in overcoming the critical moment which the Russian history faced.

잣나무 종자 성숙과정에 있어서의 내적변화와 발아력에 대한 연구

민경현 ( Kyung Hyun Min ) 한국산림과학회 1974 한국산림과학회지 Vol.21 No.1

The author intended to investigate external and internal changes in the cone structure, changes in water content, sugar, fat and protein during the period of seed maturation which bears a proper germinability. The experimental results can be summarized as in the following. 1. Male flowers 1) Pollen-mother cells occur as a mass from late in April to early in May, and form pollen tetrads through meiosis early and middle of May. Pollen with simple nucleus reach maturity late in May. 2) Stamen number of a male flower is almost same as the scale number of cone and is 69-102 stamens. One stamen includes 5800-7300 pollen. 3) The shape is round and elliptical, both of a pollen has air-sac with 80-91 μ in length, and has cuticlar exine and cellulose intine. 4) Pollen germinate in 68 hours at 25 C with distilled water of pH 6.0, 2% sugar and 0.8% agar. 2. Female flowers 1) Ovuliferous scales grow rapidly in late April, and differentiation of ovules begins early in May. Embryo-sac-mother cells produce pollen tetrads through meiosis in the middle of May, and flower in late May. 2) The pollinated female flowers show repeated divisions of embryo-sac nucleus, and a great number of free nuclei form a mass for overwintering. Morphogenesis of isolation in the mass structure takes place from the middle of March, and that forms albuminous bodies of aivealus in early May. 3. Formation of pollinators and embryos. 1) Archegonia produce archegonial initial cells in the middle and late April, and pollinators are produced in the late April and late in early May. 2) After pollination, Oespore nuclei are seen to divide in the late May forming a layer of suspe n60r from the diaphragm in early June and in the middle of June. Thus this happens to show 4 pro-embryos. The organ of embryos begins to differentiate 1 pro-embryo and reachs perfect maturation in late August. 4. The growth of cones 1) In the year of flowering, strobiles grow during the period from the middle of June to the middle of July, and do not grow after the middle of August. Strobiles grow 1.6 times more in length 3.3 times short in diameter and about 22 times more weight than those of female flower in the year of flowering. 2) The cones at the adult stage grow 7 times longer in diameter, 12-15 times shorter diameter than those of strobiles after flowering. 3) Cone has 96-133 scales with the ratio of scale to be 69-80% and the length of cone is 11-13cm. Diameter is 5-8cm with 160-190g weight, and the seed number of it is 90-150 having empty seed ratio of 8-15%. 5. Formation of seed-coats 1) The layers of outer seed-coat become most for the width of 703μ in the middle of July. At the adult stage of seed, it becomes 550-580μ in size by decreasing moisture content. Then a horny and the cortical tissue of outer coats become differentiated. 2) The outer seed-coat of mature seeds forms epidermal cells of 3-4 layers and the stone cells of 16-21 layers. The interior part of it becomes parenchyma layer of 1 or 2 rows. 3) Inner seed-coat is formed 2 months earlier than the outer seed-coat in the middle of May, having the most width of inner seed-coat 667μ. At the adult stage it loses to 80-90μ. 6. Change in moisture content After pollination moisture content becomes gradually increased at the top in the early June and becomes markedly decreased in the middle of August. At the adult stage it shows 43∼48% in cone, 23∼25% in the outer seed-coat, 32∼37% in the inner seed-coat, 23∼26% in the inner seed-coat and endosperm and embryo, 21∼24% in the embryo and endosperm, 36∼40% in the embryos. 7. The content compositions of seed 1) Fat contents become gradually increased after the early May, at the adult stage it occupies 65∼85% more fat than walnut and palm. Embryo includes 78.8% fat, and 57.0% fat in endosperm. 2) Sugar content after pollination becomes greatly increased as in the case of reducing sugar, while non-reducing sugar becomes increased in the early June. 3)

인터넷산업 매출액 추정

민경현(Min, Kyung Hyun),한근식(Han Geun Shik) 한국IT서비스학회 2016 한국IT서비스학회 학술대회 논문집 Vol.2016 No.춘계

인터넷산업의 경제적 규모가 최근 들어 급격히 증가하고 있으며 이와 관련된 산업에의 영향도 커지고 있다. 이러한 인터넷산업의 급속한 변화와 발전은 인터넷 산업의 범위와 정의에 대한 질문에 이르게 된다. 이에 한국인터넷진흥원에서는 2009년과 2010년에 인터넷산업분류체계에 대한 연구를 진행하였으며 본 연구에서는 2010년 개발된 한국인터넷진흥원의 신인터넷산업분류에 당해연도 공표된 국가승인통계 중에서 필요한 분류 및 품목을 가공하여 인터넷산업의 매출액을 추정하였다. 일반적으로 통계생산 비용의 대부분은 조사비용에 할애된다. 그러나 현재 국내에서 생산되고 있는 다수의 ICT관련 국가승인통계를 기반으로 해당부문의 분류와 품목을 분석하여 인터넷산업의 매출을 가공생산 할 수 있다는 것을 보여주었으며, 인터넷산업의 급속한 변화를 반영한 인터넷산업분류의 부분적인 개편도 제안 하였다.

슬라브애호주의의 기원

민경현 ( Kyoung Hyoun Min ) 한국서양사학회 1996 西洋史論 Vol.49 No.1

러시아 혁명과 민족주의

민경현 ( Kyoung Hyoun Min ) 고려대학교 역사연구소 2004 사총 Vol.59 No.-

한국 세계사교과서의 러시아사 서술

민경현 ( Kyoung Hyoun Min ) 고려대학교 역사연구소 1996 사총 Vol.45 No.-

뿌가쵸프쉬나의 기원에 관한 연구

민경현 ( Kyong Hyon Min ) 고려대학교 역사연구소 1994 사총 Vol.43 No.-

연 (軟) X - 선 사진에 의한 잣나무 종자의 품질진단

민경현 ( Kyung Hyun Min ) 한국산림과학회 1974 한국산림과학회지 Vol.23 No.1

The seed quality testing for Korean white pine (Pinus koraiensis), their pre-germination and embryo growing process were investigated and the abnormal embryo groups were discriminated by the use of soft X-ray photograph. The study results were as follows ; 1. The embryo reflection was clearly observed for air dried seeds (moisture content was 6.3%) at 30 sec, stratificated seeds at 60 sec (moisture content 24.0-36.0%) and immature seed (moisture content 41.0-64.0%) at 90sec., then the photographing variation for soft X-ray was the radiographing distance at 42㎝ focus M, voltage 19.5 K.V.P. and Ampere 8 mA. By the above result, the radiographing time for discriminating the embryo reflection was increased by the increase of moisture content in the seeds. 2. The embryo reflection could be clearly observed from the last ten days of June and the embryo length ratio to endosperm length was growing to 65% at the first ten days of September. By the result obtained the soft X-ray photograph was thought to be effective method for the study of inner morphology of seeds. 3. The clear reflection seeds for embryo and endorsperm were observed to 69.7% and the seeds were practically germinated to 73.2% The difference in number between the discriminated seeds by the soft X-ray photograph and the practically germinated seeds was only 6%. According to this results, the soft X-ray photograph was thought to be a effective methods for the germination diagnosis in the shortest time and with the exactness comparatively. 4. Because of the possibility of clearness for observation of pre-germination process, the soft X-ray photograph could be used for the study on the physiology of seed germination. 5. The frequency of abnormal embryos was observed of total 4.4% and their types and subtypes could be classified into twenty groups. Among these groups, single abnormal embryo type was divided into eight subtypes and observed of 2.0 percent, twin embryo was six subtypes and 1.8 percent, triple embryo was five subtypes and 0.5 percent, and inverse type was 0.12 percent.