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        • KCI등재

          스케일불변 특징의 삼차원 재구성을 통한 이동 로봇의 상대위치추정

          신동범,길세기,이종실,유제군,이응혁,홍승홍 대한전기학회 2006 전기학회논문지 D Vol.55 No.4(D)

          - A key component of autonomous navigation of intelligent home robot is localization and map building with recognized features from the environment. To validate this, accurate measurement of relative location between robot and features is essential. In this paper, we proposed relative localization algorithm based on 3D reconstruction of scale invariant features of two images which are captured from two parallel cameras. We captured two images from parallel cameras which are attached in front of robot and detect scale invariant features in each image using SIFT(scale invariant feature transform). Then, we performed matching for the two image's feature points and got the relative location using 3D reconstruction for the matched points. Stereo camera needs high precision of two camera's extrinsic and matching pixels in two camera image. Because we used two cameras which are different from stereo camera and scale invariant feature point and it's easy to setup the extrinsic parameter. Furthermore, 3D reconstruction does not need any other sensor. And the results can be simultaneously used by obstacle avoidance, map building and localization. We set 20cm the distance between two camera and capture the 3frames per second. The experimental results show ±6cm maximum error in the range of less than 2m and ±15cm maximum error in the range of between 2m and 4m.

        • SCIEKCI등재

          답리작 상치 시설재배지에서의 균핵병 발생생태에 관한 연구

          신동범,이준탁,Shin,Dong,Bum,Lee,Joon,Tak 한국식물병리학회 1987 Plant Pathology Journal Vol.3 No.4

          답후작으로 시설재배되는 상치에 발생한 균핵병의 발생생태에 대하여 조사연구한 결과, 상치 균핵병은 전생육기간을 통하여 발생하였는데, 특히 유묘기에 피해가 심하였다. 후병지$(30\times30\times5cm)$내의 균핵수는 유묘기에 22.0개, 수확기에는 5.3개가 검출되었다. 이상치 균핵병 (S. sclerotiorum)의 균사생장적온은 $25^{\circ}C$였고, $15^{\circ}C$이하의 온도에서는 $20^{\circ}C$이상의 온도에서보다 균핵의 형성수는 적었으나 큰 균핵을 형성하였고 건물중도 높았다. 토양깊이 및 시기별로 균핵을 매몰하였을 때 3월, 4월 9월의 매몰구에서는 토양깊이 3cm구까지 자양반을 형성하였으나, 6월, 12월의 매몰구에서는 90일간의 조사기간내에는 자 반을 형성하지 않았다. 그리고 중력수만 제거한 토양과 담수토양내에서 균핵을 $25^{\circ}C$와 $30^{\circ}C$로 5주간 처리하였을 때 $100\%$의 균핵이 사멸하였다. 고압멸균된 상치 식물체절편과 함께 균핵을 상치에 접종하였을 때 균핵의 균사형성에 의한 감염이 일어났으며, 포장주위식물에 대한 병원성 조사에서는 조사식물 9과 31종중 화본료 식물을 제외한 8과 25종의 식물에 병원성을 나타냈다. 그러므로 답리작으로 시설재배되는 상치에 발생한 균핵병의 전염원은 포장주위의 기주식물에 형성된 균핵이라고 생각된다. Incidence of lettuce drop was observed throughout the growing season in the vinylhouse at the southern part of Korea, Kimhai. Occurrence of this disease was especially severe at the seedling stage. Number of sclerotia in surface soil $(30\times30\times5cm)$ was 22.0 at the seedling stage, and 5.3 at harvest in the infected area. Temperature for mycelial growth ranged from 5 to $30^{\circ}C$ with optimum temperature at $25^{\circ}C$. Sclerotia were formed fewer at low temperature, but their size was larger resulting in heavier dry weight than that at high temperature. The apothecia were formed from the sclerotia that were buried in March, April and September upto 3cm soil depth, but formed from those buried only 1 em soil depth in October. Sclerotia buried in June and December did not form apothecia regardless of soil depth by 90 days. The sclerotia buried in the 5cm of soil depth did not form apothecia. Sclerotia that were embedded in wet or flooded soil at $25^{\circ}C$ and $30^{\circ}C$ for 5 weeks lost their viability. Infection of lettuce was possible with mycelia originated from sclerotia on autoclaved lettuce plant fragments. The fungus was pathogenic on 25 plant species in 8 families in artificial inoculation tests. Lettuce seedlings appeared to be infected by airborne ascospore originated from sclerotia on crops and weeds around paddy fields, because sclerotia existing in soil might perish under long flood conditions during rice cultivation.

        • 미생물 포괄고정화를 위한 고정화재의 비교검토

          신동범,윤창훈,강경수 제주대학교 환경연구소 1997 환경연구논문집 : 제주대 Vol.5 No.-

          We conducted the experiments to find out the appropriate gelling materials for the treatment of waste water by immobilizing microorganisms inside the gels. The gelling materials known to immobilize microorganisms or cells in them are polyacrylamide, polyvinylalcohol, sodium alginate, κ-carrageenan and chitosan. The gel strengths were determined by the breaking points of the pellet using a rheometer with reaction time. The polyacrylamide gels were retained their solidities and activities excellently compared with the other pellets of polyvinylalcohol, sodium alginate and chitosan with reaction time. It is considered that, in the other hand, the polyacrylamide gels are toxic to the single microorganisms and cells by free radicals during the formation of gels. We used activated sludge for the mmobilization, so it didn't matter the toxicity caused by free radicals. The profiles of waste water treatment by all the immobilized pellets using in this study were showed nearly similar patterns, but gel strength of all the gels except polyacrylamide pellets were getting weak and weak as reaction time goes by. It was concluded that the polyacrylamide gels are excellent for immobilization of activated sludge for waste water treatment, but in the case of immobilization of single microorganisms or cells, natural polysaccharides of sodium alginate, κ -carrageenan or chitosan are thought to be suitable, and it must be developed the techniques for elevating gel strength of nautral polysaccharides.

        • 유전자조작 농산물의 개발현황과 그 안전성 평가

          신동범 제주대학교 환경연구소 1998 환경연구논문집 : 제주대 Vol.6 No.-

          In recent years, the safety of foods and food ingredients from genetically modified plant varieties has been widely discussed. Genetical modification technique to transfer genetic information from one species to another has been possible for about two decades. The ability to transform, or insert new DNA into the plant cell, exists now for most crops, including maize, wheat, soybean, cotton, and rice. Early products of this technology include plants with enhanced insect and disease resistance, and improved herbicide tolerance. Future goals are to increase higher yield, improve nutritional and processing characteristics, and produce specialty oils, carbohydrates, and proteins. Some examples of genetically modified products that have been commercialized are FLAVR SAVR™ tomato, Bollgard^㉿ cotton, Round-Up Ready㉿ soybean, Maximizer™ and NatureGard™ corn, Laurical㉿ Canola oil, and Feedom IF" squash. The international agencies. OECD and WHO, and USDA. FDA and EPA in United States issued a policy statement on foods derived from new plants varieties each other. The document from FDA discussed criteria that should be considered by plant breeders and food manufacturers in assessing the safety of foods derived from new plant varieties before they enter the marketplace. Even though genetically modified plants and their foods are now evaluated safe enough by scientific experiments. the present scientific knowledges won't the truth forever. The ultimate judges of new products of biokhnology will be consumers. They will be more confident in the safety of foods derived from plants deveolped by new technology if scientist and developers share information on safety testmg.

        • 노화와 관련된 전사인자들

          신동범 제주대학교 생명과학연구소 2001 제주생명과학연구 Vol.4 No.-

          The biology of aging is still emerging field and, as such, is replete with controversies and contadictions. Although the definition of aging is controversial, in the case of higher animal, it can be defined as a progressive deterioration of biological functions observed only after the organism has attained its maximum reproductive competence. Such age-dependant decline of biological functions involves complex interations among many contributing factors. Among those, oxidative damage caused by oxidative stress is the predominant cause of the age-dependant decline of biological functions. The progressive increase of oxidative stress during aging not only causes oxidative damage to cellular macromolecules, but also modulate the pattern of gene expression through functional alterations of transcription factors. Chronic oxidative stress and inflammatory reaction lead to many age-associated disease such as atherosclerosis and arthritis. Transcription factors that are directly influenced by ROS and proinflammatoy cytokines include nuclear factor kappa B(NF-kB), activator protein 1(AP-1), specificity protein 1(Sp1), peroxisome proliferator-activated receptors(PPARs) and other members of the nuclear receptor superfamily.

        • 생리적조건에서 L-Ascorbic acid의 분해물질

          申東範 제주대학교 1993 논문집 Vol.37 No.-

          . The degradation products of L-ascorbic acid was examined by incubating it alone and in the presence of α-N-formal-L-Lysine(NFL) at pH 7.4(0.2M phosphate buffer) in the presence of oxygen, metal ion chelator, and in both the presence and absence of sodium cyanoborohydride. Among the large number of degradation products produced, threonic, oxalic, glyceric and glyoxylic acids, as well as threose were all identified by GLC-MS. Decarboxylation is also a feature of the degradation, with approximately 30% of the ascorbic acid undergoing degradation via this pathway. In the presence of NFL and cyanoborohydride ??-N-caboxymethyl-L-lysine(CML) was detected as a reaction product as well. Using GLC-MS as the detection method and ascorbic acid-1-?? as the reactant, only glyoxylic acid and CML were found to contain a ?? Label, indicating that, of the compounds identified above, only these latter two contain C-1 of ascorbic acid.

        • KCI등재

          벼 키다리병 방제를 위한 차아염소산나트륨 이용

          신동범,고재덕,이봉춘,강인정,강항원 한국식물병리학회 2014 식물병연구 Vol.20 No.4

          '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

          For application of sodium hypochlorite as a seed disinfectant to the control of bakanae disease caused by Gibberella fujikuroi in rice, we investigated the effects of sodium hypochlorite for antifungal activity, eliminating fungus from seeds and reducing disease occurrence in vitro and greenhouse. The viability of the pathogen was significantly reduced at 80 ml/l concentration of sodium hypochlorite, and the pathogens did not grow at over 100 ml/l concentration of sodium hypochlorite. The effect of eliminating fungus was 90% at treatment of 0.3% sodium hypochlorite solution to infected rice seeds for eight hours. When the rice seeds were soaked into 0.5% and 0.3% sodium hypochlorite solutions for twelve hours, the disease incidences of rice seedling were remarkably reduced to 4.3% and 4.7%, respectively, compared to 97.3% of non-treatment control. The rates of seedling stand were 29.1% and 26.9% higher with the sodium hypochlorite treatment than that of non-treatment control. When prochloraz and sodium hypochlorite was treated to naturally severely infested rice seeds with bakanae disease, the disinfection effect was higher than that of prochloraz alone treatment. When the seeds were soaked in sodium hypochlorite before or after prochloraz, the rate of seed contamination was low as 4.0% or 6.3%, respectively, compared to prochloraz alone as 13.7%. The disease incidence was low as 3.7% or 8.3%, respectively, compared to prochloraz alone as 14.3%. The disinfection effect of treatment with prochloraz after sodium hypochlorite was higher than that of treatment with prochloraz before sodium hypochlorite.

        • KCI등재
        • 메일라드 반응과 노화

          신동범 제주대학교 생명과학연구소 1999 제주생명과학연구 Vol.2 No.-

          It is obvious that the Maillard reaction, also called glycation or non-enzymatic glycosylation of proteins by carbohydrates, is related with molecular and cellular lesion in aging and age-related diseases. Aging is characterized by progressive, irreversible and deleterious changes in tissue function. Some of the most pronounced changes occur in tissues with long-lived proteins such as in the extra and intracellular matrix, the lens and the brain. Most of these changes are dramatically worsened by diabetes. By and large, most of the changes observed in aging occur twice faster in diabetes. The importance of the Maillard reaction in aging of living organisms has been appreciated only recently. In the advanced stage of this reaction, advanced glycation endproducts(AGEs) accumulate in tissues as a function of time and sugar concentration. AGEs also induce permanent abnormalities in extra and intracellular matrix component function, stimulate cytokine and reactive oxygen species production through AGE-specific receptors, and modify intracellular proteins.

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