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      • Aedes aegypti(L.) 모기의 PolyA^+-RNA의 분리

        박기태,姜奭熙 성균관대학교 기초과학연구소 1985 論文集 Vol.36 No.2

        1. 흡혈한 Aedes aegypti(L.) 암모기는 흡혈전에 없던 특이한 RNA를 생산하였다. 새로 나타난 RNA는 분자량이 23S보다 크게 나타났으며 따라서 Messenger RNA 임이 추정되었다. 2. 흡혈후 18시간이 경과한 암모기에서 추출한 RNA를 Oligo(dT)-cellulose chromatography로 분리함으로써 흡혈후 모기안에 새로 나타난 특이한 RNA를 획득한 결과, 이 RNA가 Poly(A)-Sequence를 지니는 Messenger RNA 임을 확인하였다. The possibility that the anautogenous mosquito, Aedes aegypti, females may produce vitellogenin messenger ribonucleic acid (Vg mRNA), following a blood meal has been investigated. The level of RNA began to increase at 6 hours post eclosion to become maximal at 18 hours, which then declined to the negligible level by 36 hours and remained low throughout the egg maturation period. Agarose gel electrohphoresis of the RNA from blood fed females revealed a new species of RNA, designated as 18 hours RNA. The molecular weight of the 18 hours RNA was found to be much greater than that of 16s and 23s ribosomal RNA, which was absent in the RNA extracted from non blood fed females of from males mosquitoes. The possibility that the 18 hours RNA is messenger RNA was further supported by the fact that the RNA bound to oligo-(dT) cellulose column and was eluted with no salt buffer. Poly (A)^+-RNA migrated on agarose gel at the same rate as that RNA newly appeared in the blood fed female mosquitoes.

      • KCI등재

        공론화 과정에서 나타난 숙의 효과: 대입제도 개편 공론화를 중심으로

        박기태,이명진 한국조사연구학회 2020 조사연구 Vol.21 No.2

        This research aims to explore how a participatory survey (also known as deliberative polling) goes and how learning and deliberation affect changes in participant’s opinions during it, using a Korean case of the participatory survey to reform the College Entrance System. As the participatory survey goes, participant’s initial opinions do not remain the same, or their preference in a particular agenda is not strengthened, but their opinions get more diversified. Moreover, it is not found that the participatory survey drives the final result in one direction. To effectively process a deliberative polling in the future, it is necessary to accumulate the data on how it changes citizens’ opinions on social issues and empirically analyze them. Besides, society needs to find a way to improve an individual's civic mindedness, an essential element for a participatory survey. 이 연구는 공론화의 구체적 효과를 살펴보기 위하여 최근 중앙정부가 전국 규모로 실시한 대입제도 개편 공론화 자료를 분석하였다. 분석의 결과를 통해 제한적 수준에서 공론화의 영향을 확인할 수 있었다. 공론화가 진행되면서 최초의 의견이 유지·강화되거나 특정 의제에 대한 선호가 심화되는 것이 아니라 시민참여단의 의견이 더욱 다양해졌다. 그러나 최종적 합의를 강화하는 효과를 발견하기 어려웠다. 앞으로 공론화 과정을 효과적으로 진행하기 위해서는 사회의 쟁점에 대한공론화가 어떻게 영향을 미쳤는지에 대한 자료들을 축적하고 분석할 필요가 있다. 아울러 공론화과정에서 가장 필수적인 요소인 개별 시민의 시민성을 어떻게 높일 것인가에 대한 사회적 노력이필요하다.

      • KCI등재

        개에서 창상에 의해 발생한 다발성 폐낭포의 방사선학적 진단례

        박기태,왕지환,연성찬,이효종,이희천 한국임상수의학회 2009 한국임상수의학회지 Vol.26 No.1

        Pulmonary bullae are air-filled spaces within the lung parenchyma that result from the destruction, dilatation and confluence of adjacent alveoli. Pulmonary bullae are found most often in healthy, middle aged, large breed or deep-chested dogs that have no previous history of lung disease and bulla may occur as a result of emphysema, inflammation or trauma. Clinical signs include respiratory distress, anorexia, depression and tachypnea. In this study, a dog with respiratory distress by traffic accident was diagnosed as pulmonary bullae with pneumothorax using radiography at Veterinary Medical Teaching Hospital, GNU. In radiographs, various sized, smooth margin, well defined, oval shaped, gas or fluid filled multiple bullae are shown in the left cranial, left caudal and right accessory lobes. At the initial stage of observation, there were indications of four bullae, two of which were not found in the following radiograph. At the same time, there were serious indications of lung consolidation that caused respiratory distress of patient. Ultimately, the patient was expired after ten hours.

      • KCI등재
      • KCI등재

        Analyzing North Korea's Decision-making Process on its Second Nuclear Test (May/2009) with the Rational Choice and Cognitive Choice Models

        박기태 국방대학교 국가안전보장문제연구소 2010 The Korean Journal of Security Affairs Vol.15 No.1

        This paper is an analysis of North Korea's decision-making process regarding its Second Nuclear Test (May/2009) utilizing two choice models―Rational Choice and Cognitive Choice. The paper concludes with a suggestion for an effective/adaptive/robust deterrence strategy for the ROK-US combined forces. The Rational Choice Model (RCM), endorsed by the Expected Utility Theory,suggests that the North Korean leadership should adopt the option maximizing its expected utility in its nuclear confrontations with its opponents, while the Cognitive Choice Model (CCM), endorsed by the Prospect Theory, anticipates that Pyongyang would adopt the option meeting its reference point, heavily influenced by its domains of actions (either the domain of gains or losses). Sharing the same root and method of calculating utility, they have one explicit difference in weighting probability assigned to each outcome―the RCM weights the value and probability assigned to each outcome in a linear manner, while the CCM does so in a non-linear manner depending on the range of probability, thus resulting in a different prediction. According to the test of the hypothesis using North Korea's Second Nuclear Test (May/2009), unlike the traditional wisdom, the CCM is more explanatory than the RCM in explaining Pyongyang's strategic behavior in respect of its nuclear programs. Based on the results of this research, this essay suggests coercive strategies (mainly composed of punishment, risk, decapitation and denial strategies) exploiting the unique characteristics of air power as an alternative deterrence strategy to effectively deter North Korea in the future because it is best fitted for influencing the decision-making process of North Korea.

      • KCI등재

        앵커 객체 추출을 이용한 앵커 프레임 검출

        박기태,문영식,황두선 대한전자공학회 2006 電子工學會論文誌-SP (Signal processing) Vol.43 No.5

        In this paper, an algorithm for anchor frame detection in news video is proposed, which consists of four steps. In the first step, the cumulative histogram method is used to detect shot boundaries in order to segment a news video into video shots. In the second step, skin color information is used to detect face regions in each shot boundary. In the third step, color information of upper body regions is used to extract anchor object, which produces candidate anchor frames. Then, from the candidate anchor frames, a graph-theoretic cluster analysis algorithm is utilized to classify the news video into anchor-person frames and non-anchor frames. Experiment results have shown the effectiveness of the proposed algorithm. 본 논문에서는 뉴스 비디오에서 앵커 프레임 검출을 위한 알고리즘을 제안한다. 제안된 알고리즘은 다음과 같이 4단계로 구성된다. 첫 번째 단계에서, 뉴스 비디오를 비디오 샷들로 분할하기 위해 누적 히스토그램(cumulative histogram) 기법을 이용하여 샷 경계(shot boundary)를 검출한다. 두 번째 단계에서는 각 비디오 샷 경계에서 얼굴 영역들을 찾기 위해서 피부 컬러(skin color) 정보를 이용하고, 세 번째 단계에서는, 앵커 객체를 추출하기 위해서 사람의 상체 부분의 컬러 정보를 이용하여 앵커 후보 프레임을 검출하며, 마지막 단계에서, 후보 프레임들에 대해서 앵커 프레임과 비앵커 프레임을 분류하기 위해서 그래프 이론을 이용한 클러스터 분석 알고리즘을 적용한다. 실험 결과를 통해서 제안한 알고리즘이 효과적으로 앵커 프레임을 검출하는 것을 보여준다.

      • KCI등재

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