고고도 장기체공 무인기 구조 설계 및 해석

김성준,이승규,김성찬,김태욱,김승호,Kim, Sung Joon,Lee, Seunggyu,Kim, Sung Chan,Kim, Tae-Uk,Kim, Seungho 한국항공운항학회 2014 한국항공운항학회지 Vol.22 No.3

Research is being carried out at Korea Aerospace Research Institute with aim of design a HALE UAV(High Altitude Long Endurance Unmanned Air Vehicle). HALE UAVs are ideally suited to provide surveillance, remote sensing and communication relay capabilities for both military and civilian applications. HALE UAVs typically cruise at an altitude between 15 km and 20 km, travelling at low speed and circling specific area of interest. Airframe structural point of view, weight reduction of the airframe structure is the most important method to improve the flight efficiency. High modulus CFRP(Carbon Fiber Reinforced Polymer) has been used in designing the structure in order to minimize the airframe weight. With respect to structural design and analysis, the key question is to decide an adequate airworthiness certification base to define suitable load cases for sizing of various structural components. In this study, FAR(Federal Aviation Regulation) 23 have constituted the guidance and benchmark throughout all structural studies. And the MSC/FlightLoads was introduced to analyze the flight loads for the HALE UAV. The MSC/FlightLoads can compute the flexible air load and analyzed loads are distributed on structural model directly. A preliminary structural concept was defined in accordance with the estimated inertial and aerodynamic loads. A FEM analysis was carried out using the MSC/Nastran code to predict the static and dynamic behaviour of UAV structure.

노발리스를 이용한 방사선 수술시 치료테이블을 투과하는 광자선의 감쇠율에 따른 선량 보정방법

김성준,신현수,고승영,박혜리,김자영,이보미,예지원,김성규,Kim, Sung-Joon,Shin, Hyun-Soo,Ko, Seung-Young,Park, Hye-Li,Kim, Ja-Young,Lee, Bo-Mi,Yea, Ji-Woon,Kim, Sung-Kyu 한국의학물리학회 2011 의학물리 Vol.22 No.1

본 연구는 노발리스용 치료테이블(couch top)을 투과하는 광자선의 감쇠율(attenuation rate)을 기하학적 모델을 통해 계산하고 보정함으로써, 치료부위에 정확한 선량이 전달되게 하는데 그 목적이 있다. 실험은 치료테이블을 투과하는 광자선의 투과율과 감쇠율을 기하학적인 모델에 의해 예측하고 이를 바탕으로 실험적으로 측정된 것을 비교 및 분석하였다. 그 결과 기하학적 모델에 의해 예측된 값과 실험값이 매우 잘 일치하는 것으로 나타났다. 또 실제 임상적용의 가능여부를 판단하기 위하여, 척추 방사선수술(spine radiosurgery)환자의 치료계획에 모델링화한 감쇠율을 보정한 뒤 측정한 중심점 선량과 그렇지 않은 것을 비교하였더니, 전자가 치료계획된 것과의 오차율이 감소함을 보였다. 본 논문에서는 치료테이블을 투과하는 광자선의 기하학적 모델을 통해 투과율과 감쇠율을 계산하고 이를 실험적으로 증명하였다. 이 방법은 노발리스를 이용한 방사선 수술뿐만 아니라 일반적인 방사선 치료에 있어서도 매우 유용할 것으로 판단된다. This study has its own goal to deliver the accurate dose on the target volume by calculating and modifying the attenuation rate of photon beam transmitting the couch top with geometric model. The experiment was that the transmission rate and attenuation rate of photon beam transmitting the couch top was predicted by the geometric model, then compared and analyzed with what was measured experimentally based on that. The result showed that the predicted value by the geometric model accorded closely with the experimental value. In addition, in order to judge whether the practical clinical application is available, the point dose, measured after modifying the attenuation rate modelinged according to the treatment plan of a patient of spine radiosurgery, was compared with the one done nothing. The result was that the former showed decreased error range with treatment planned one than the latter. This papers calculated the transmission and attenuation rate with the geometric model transmitting the couch top and verified it experimentally. This method is expected to be very useful in not only the radiosurgery using Novalis but also the general radiation therapy.

파아지 T7 전사종결제에 의한 파아지 SP6와 T7 RNA 중합효소의 전사종결반응

김성준,강창원,Kim, Sung-Joon,Kang, Chang-Won 생화학분자생물학회 1988 한국생화학회지 Vol.21 No.4

파아지 T7 genome에서 비교적 강력한 T7RNA 중합효소의 전사종결제로 알려진$T{\phi}$의 전사종결효율에 대해서 연구하였다. 또한 T7 RNA 중합효소와 분자생물학적 특성이 유사한 파아지 SP6 RNA 중합효소에 대한 종결능력 여부를 조사하였다. 우선, 종결제 $T{\phi}$가 클론된 플라스미드 pET-3로부터 SP6와 T7 RNA 중합효소의 전사촉진제가 서로 마주보고 있는 플라스미드 pGEM3Z로 $T{\phi}$를 옮겼다. 전사종결효율을 정량적으로 측정하기 위하여 [${\alpha}-^{32}P$]rNTP를 사용하여 생체 외 전사반응을 통해 전사체에 방사능을 부여하였다. 그리고 종결제 아랫부분을 제한효소로 절단하여 전사시킴으로써 얻어지는 run-off 전사체의 양과 종결제에 의해 종결된 전사체의 양을 비교하였다. T7 RNA 중합효소의 전사는 pET-3에 있는 $T{\phi}$에 의해서 78%가 종결되는 반면, pGEM3Z에 삽입된 $T{\phi}$에 의해서는 38% 밖에 종결되지 않았다. 이는 종결제 이외의 DNA 염기열이 전사종결에 영향을 마치는 것을 시사한다. 또한, SP6 RNA 중합효소의 전사도 pGEM3Z에 삽입된 $T{\phi}$에 의해서 81%가 종결되었다. 이는 두 파아지 중합효소의 전사종결기작이 유사함을 시사한다. Transcription termination efficiencies of a phage T7 terminator $T{\phi}$ for the T7 and SP6 RNA polymerases were studied. The terminator $T{\phi}$ cloned in the plasmid pET-3 was subcloned into the plasmid pGEM3Z which contains both SP6 and T7 RNA polymerase promoters facing each other. Amounts of transcripts terminated at $T{\phi}$ were compared with amounts of read-through transcripts run off at a restriction site. For quantitative analysis the transcripts were labeled with [${\alpha}-^{32}P$]rNTP in in vitro transcription reaction. Transcription of T7 RNA polymerase terminates with efficiency of 78% by the $T{\phi}$ in the pET-3, but terminates with efficiency of 38% by the $T{\phi}$ in the pGEM3Z. It suggests that DNA sequences other than the terminator sequence affect the termination efficiency. Interestingly, the $T{\phi}$ shows 81% termination efficiency for the SP6 RNA polymerase. Now this becomes the first strong terminator discovered for the SP6 RNA polymerase. This also suggests that both phage RNA polymerases might share similar mechanism of transcription termination.

초등수학영재를 위한 교수학습 자료 개발 및 적용

김성준,Kim, Sung Joon 영남수학회 2021 East Asian mathematical journal Vol.37 No.4

This study analyzes the characteristics of elementary math gifted classes through the development and application of teaching and learning materials. We used the guided reinvention methods including quasi-experiential perspectives. To this end, the applicability of Lakatos' quasi-empirical mathematical philosophy in elementary mathematics was examined, and the criteria for the development of teaching and learning materials for gifted students were presented, and then this study was conducted in this theoretical background. The subjects of the study were 21 elementary students at P University's Institute of Science and Gifted Education, and non-face-to-face real-time classes were conducted. Classes were divided into introduction, deployment1, deployment2, organization stages, and in each stage, small group cooperative learning was conducted based on group activities, and in this process, the characteristics of elementary mathematics gifted were analyzed. As a result of the study, elementary mathematics gifted students did not clearly present the essence of justification in the addition algorithm of fractions, but presented various interpretations of 'wrong' mathematics. They also showed their ingenuity in the process of spontaneously developing 'wrong' mathematics. On the other hand, by taking interest in new mathematics starting from 'wrong' mathematics, negative perceptions about it could be improved positively. It is expected that the development of teaching and learning materials dealing with various and original topics for the gifted students in elementary school will proceed through follow-up research.

임진강 유역의 홍수기 강우-유출모형 적용 및 레이더강우 자료의 활용방안

김성준,박노혁,맹승진,Kim Seong-joon,Park Roh-hyuk,Maeng Sung-jin 한국관개배수위원회 1998 한국관개배수논문집 Vol.5 No.1

The purpose of this study is to evaluate storm runoff models of Imjin river basin(8,117.5$km^2$) for the provision of radar rainfall situation. Two lumped models, Storage Function Model(SFM) and HEC-1 model which are now in use broadly and prov

유무인 겸용 개인항공기(OPPAV) 개념설계를 위한 구조물 사이징

김성준,이승규,Kim, Sung Joon,Lee, Seung-gyu 한국항공운항학회 2020 한국항공운항학회지 Vol.28 No.1

Personal air vehicle (PAV) is considered by aviation engineers as a solution to provide fast urban mobility. The purpose of designing a optionally piloted PAV (OPPAV) is to provide an individual air vehicle. The airframe structure is designed with high strength carbon fiber composite to reduce the aircraft weight. This paper presents an overview of sizing process for OPPAV at the conceptual design level. It consists of load analysis, structural sizing and development of efficient design allowable values for composite material. The weight is estimated based on sizing process, including strength and stiffness requirements. The objective of this study is to present a overview of structural sizing procedure and fast tool for preliminary design phases.

파아지 T7전사종결제에 의한 파아지 SP6 와 T7 RNA 중합효소의전사종결반응

김성준,강창원 ( Sung Joon Kim,Chan Gwon Kang ) 생화학분자생물학회 1988 BMB Reports Vol.21 No.4

Transcription termination efficiencies of a phage T7 terminator Tø for the T7 and SP6 RNA polymerases were studied. The terminator Tø cloned in the plasmid pET-3 was subcloned into the plasmid pGEM3Z which contains both SP6 and T7 RNA polymerase promoters facing each other. Amounts of transcripts terminated at Tø were compared with amounts of read-through transcripts run off at a restriction site. For quantitative analysis the transcripts were labeled with [α-^(32)P]rNTP in in vitro transcription reaction. Transcription of T7 RNA polymerase terminates with efficiency of 78% by the Tø in the pET-3, but terminates with efficiency of 38% by the Tø in the pGEM3Z. It suggests that DNA sequences other than the terminator sequence affect the termination efficiency. Interestingly, the Tø shows 81% termination efficiency for the SP6 RNA polymerase. Now this becomes the first strong terminator discovered for the SP6 RNA polymerase. This also suggests that both phage RNA polymerases might share similar mechanism of transcription termination.

라이프니츠의 분석법에 관한 고찰

김성준,Kim, Sung-Joon 한국수학사학회 2006 Journal for history of mathematics Vol.19 No.4

This paper aims to review Leibniz's analytic ideas in his philosophy, logics, and mathematics. History of analysis in mathematics ascend its origin to Greek period. Analysis was used to prove geometrical theorems since Pythagoras. Pappus took foundation in analysis more systematically. Descartes tried to find the value of analysis as a heuristics and found analytic geometry. And Descartes and Leibniz thought that analysis was played most important role in investigating studies and inventing new truths including mathematics. Among these discussions about analysis, this paper investigate Leibniz's analysis focusing to his ideas over the whole of his studies. 수학에서 분석(analysis)의 역사는 고대 그리스에서부터 시작되었다. 그리스의 기하적 분석법은 16세기 비에트$(Vi{\`{e}}te)$와 데카르트(Descartes) 이후 방정식을 이용한 문제해결(대수적 분석법)로 확장되었으며, 그 결과 대수는 분석을 위한 기술(art for analysis)로 대변되었다. 그리고 뉴헌(Newton)과 라이프니츠(Leibniz)에 의해 미적 분학이 탄생되면서 분석은 대수에서 한 걸음 더 나아가 오늘날 수학의 한 분야인 해석학으로 발전되었다. 그 동안 수학교육학 연구에서는 분석과 관련된 논의가 파푸스(Pappus)와 데카르트를 중심으로 다루어져 왔으나, 지금까지 라이프니츠의 역할과 그에 대한 연구는 거의 다루어지지 않았다. 본 연구는 라이프니츠의 철학 및 논리학을 바탕으로 그 가운데 분석과 관련된 그의 아이디어를 살펴보고, 이를 통해 그가 생각한 수학에서의 분석의 역할에 대해 논의하였다.

역사-발생적 분석을 통한 대수 지도

김성준,Kim, Sung-Joon 한국수학사학회 2005 Journal for history of mathematics Vol.18 No.3

수학사는 수학 교육에서 수학의 실제와 수학을 하는 사고 과정을 강조하기 위해 분석의 대상이 되어야 한다. 수학사를 분석하는 것은 수학적 활동을 이해하는 방법 가운데 하나로, 역사적으로 수학자들의 활동이 어떻게 변하면서 발전되어 왔는지, 그리고 수학적 개념들이 어떻게 전개되어 왔는지를 살펴보기 위한 것으로, 이러한 내용은 수학 교육적 관점에서 중요하게 다루어져야 한다. 본 연구는 이러한 관점에서 학교대수에서 다루는 문자 기호(미지수)와 음수를 중심으로 하여 수학사에서 등 장한 몇몇 텍스트를 분석하고 동시에 교육적인 논의를 이끌어내고자 한다. 이를 위해 먼저 수학교육에서 역사-발생적 분석의 필요성과 그 의의에 대해 살펴보고, 이러한 분석에서 제기되는 인식론적 장애에 대해 논의한다. 다음으로 역사-발생적 분석을 실제 대수 지도에 적용해보기 위해, 방정식에서 사용된 문자 기호(미지수)의 역사를 몇몇 텍스트를 통해 살펴보고 이를 선행된 실험연구의 결과와 함께 논의한다. 또한 음수의 역사를 개괄하면서 역시 몇몇 텍스트를 살펴보고, 음수의 역사를 대수 지도와 관련해서 논의한다. 수학사는 인류의 대역적인 학습 과정으로 학교수학에서 다루는 개념들에 의미 있는 토대를 마련해준다. 본 연구의 논의는 이러한 측면에 주목한 것으로 역사-발생적 분석을 대수 지도를 개선하기 위한 방안 가운데 하나로 본 것이다. History of mathematics must be analysed to discuss mathematical reality and thinking. Analysis of history of mathematics is the method of understanding mathematical activity, by these analysis can we know how historically mathematician' activity progress and mathematical concepts develop. In this respects, we investigate teaching algebra through historico-genetic analysis and propose historico-genetic analysis as alternative method to improve of teaching school algebra. First the necessity of historico-genetic analysis is discussed, and we think of epistemological obstacles through these analysis. Next we focus two concepts i.e. letters(unknowns) and negative numbers which is dealt with school algebra. To apply historico-genetic analysis to school algebra, some historical texts relating to letters and negative numbers is analysed, and mathematics educational discussions is followed with experimental researches.

전국 기후변화 영향평가를 위한 분포형 수문분석 툴 개발

김성준,김상호,조형경,안소라,Kim, Seong Joon,Kim, Sang Ho,Joh, Hyung Kyung,Ahn, So Ra 한국농공학회 2015 한국농공학회논문집 Vol.57 No.2

The purpose of this paper is to develop a software tool, PGA-CC (Projection of hydrology via Grid-based Assessment for Climate Change) to evaluate the present hydrologic cycle and the future watershed hydrology by climate change. PGA-CC is composed of grid-based input data pre-processing module, hydrologic cycle calculation module, output analysis module, and output data post-processing module. The grid-based hydrological model was coded by Fortran and compiled using Compaq Fortran 6.6c, and the Graphic User Interface was developed by using Visual C#. Other most elements viz. Table and Graph, and GIS functions were implemented by MapWindow. The applicability of PGA-CC was tested by assessing the future hydrology of South Korea by HadCM3 SRES B1 and A2 climate change scenarios. For the whole country, the tool successfully assessed the future hydrological components including input data and evapotranspiration, soil moisture, surface runoff, lateral flow, base flow etc. From the spatial outputs, we could understand the hydrological changes both seasonally and regionally.