임하호에서의 (臨河湖) 식물성플랑크톤 군집의 (群集) 생태학적 고찰

김용재,최재신,김도한,정준 ( Yong Jae Kim,Jae Sin Choi,Do Han Kim,Jung Chung ) 한국하천호수학회 1995 생태와 환경 Vol.28 No.1

This study was investigated the ecological study of phytoplankton community from eight stations of Imha lake on May, July, September and November in 1993. Phytoplankton was identified the total 297 taxa, which was composed of 261 species, 29 varieties, 3 forma and 4 unidentified taxa. Standing crops were ranged from 6.Ox10^5unit/l at st. 1 on May to 1.4×10^7unit/l at st. 2 on July. Dominant species were Anabaena soilitaria f. planctonica, Cyclotella comta, Cyclotella meneghiniana, Cyclotella ocellata, Cyclotella stelligera and Synedra delicatissima var. angustissima. Dominant index, diversity index and evenness index were 0.068∼0.750, 0.341∼1.367, 0.183∼0.716, respectively. In relationships between community and physico-chemical factors, chlorophyll-a concentration was showed a law coefficient with the total standing crops but a high with standing crop of C. stelligera. Water temperature was a positive relations with the total standing crops. T-P was showed a low relation with the total standing crops and a negative with A. solitaria f. planctonica. T-N and conductivity were a positive with the total standing crops and standing crop of Bacillariophyceae. This lake was the oligotrophic or mesotrophic type on May but converted from mesotrophic to eutrophic type at all stations on July, September and November by comparison with phytoplankton community and physico-chemical factors.

MPEG-2에서 H.264로의 Transcoding 과정에서 DCT 계수를 H.264 변환 계수로 변환하는 효율적인 알고리듬

김용재,이창우,Kim, Yong-Jae,Lee, Chang-Woo 한국통신학회 2007 韓國通信學會論文誌 Vol.32 No.8c

가장 최근에 표준화된 H.264/AVC 동영상 압축 부호화 방식은 기존의 방법인 MPEG-2에 비해 우수한 압축 효율을 보이지만, 아직 많은 응용분야에서 MPEG-2가 적용되고 있기 때문에 MPEG-2에서 H.264/AVC로의 변환 기법 개발이 필요하다. 본 논문에서는 이러한 변환을 위해 가장 첫 번째 단계로 볼 수 있는 DCT 계수에서 H.264 변환 계수로의 변환을 위한 효율적인 방법을 제안한다. 이러한 변환은 영상의 압축을 위한 변환기술로 MPEG-2에서는 $8{\times}8$ discrete cosine transform(DCT)를 사용하고 있고, H.264/AVC 표준안에서는 $4{\times}4$ integer transform을 사용하고 있기 때문에 필수적이다. 제안하는 알고리듬에서는 부호화 성능을 유지하면서 효율적으로 계산량을 감소시킬 수 있는 방법을 제시하고 계산량 분석과 모의실험을 통해서 이를 입증한다. The H.264/AVC video coding standard provides higher coding efficiency compared to the conventional MPEG-2 standard. Since a lot of videos have been encoded using MPEG-2, the format conversion from MPEG-2 to H.264 is essential. In this paper, we propose an efficient method for the conversion of DCT coefficients to H.264/AVC transform coefficients. This conversion is essential, since $8{\times}8$ DCT and $4{\times}4$ integer transform are used in MPEG-2 and H.264/AVC, respectively. The mathematical analysis and computer simulation show that the computational complexity of the proposed algorithm is reduced compared to the conventional algorithm, while the loss caused by the conversion is negligible.

임플랜트 표면 처리 방법에 따른 골조직 반응에 대한 연구

김용재,조인호,Kim, Yong-Jae,Cho, In-Ho 대한치과보철학회 2007 대한치과보철학회지 Vol.45 No.1

Statement of problem: Implant surface characteristics plays an important role in clinical success and many studies have been made for improvement of success by changing surface roughness. Purpose: Appropriate increase of surface roughness increases the activity of osteoblast and enhance contact and retention between bone and implant. Material and method- Machined, SLA and RBM surface implants, which are the most commonly used implants were implanted into the tibia of rabbits and after 1 week, 4 weeks, 8 weeks and 12 weeks there were histologic and histomorphometric analysis and study for bone gradient and change of Ca/P ratio using EDS(Energy Dispersive X-ray Spectroscope). Results: Comparison of bone-implant contact showed no significant difference among each implant. In comparison of bone area rates, SLA showed higher value with significant difference at 1 week and 4 weeks, and SLA and RBM at 8 weeks than Machined implant (p<0.05). In analysis of bone constituents with EDS, titanium was specifically detected in new bones and the rates were constant by surface treatment method or period. In case of Ca/P ratio, according to surface treatment method, each group showed significant difference. Lots of old bone fragments produced during implantation remained on the rough surface of RBM implant surface and each group showed histological finding with active synthesis of collagen fibers until 12 weeks. In transmission electronic microscopic examination of sample slice after elapse of twelve weeks, tens nm of borderline (lamina limitans like dense line)was seen to contact the bone, on the interface between bone and implant. Conclusion: SLA and RBM implant with rough surface shows better histomorphometrical result and the trend of prolonged bone formation and maturation in comparison with Machined implant. In addition, implant with rough surface seems to be helpful in early stage bone formation due to remaining of old bone fragments produced in implantation. From the results above, it is considered to be better to use implant with rough surface in implantation.

기업간(B2B) 전자결재

김용재,Kim, Yong-Jae 한국전자정보통신산업진흥회 2001 電子振興 Vol.21 No.11

전자문서 표준화 현황 및 추진방향

김용재,Kim, Yong-Jae 한국전자정보통신산업진흥회 2001 電子振興 Vol.21 No.5

An Optimal Incentive-Compatible Pricing for Congestible Networks

김용재,Kim, Yong-Jae 한국경영정보학회 1997 Asia Pacific Journal of Information Systems Vol.7 No.3

Pricing information services, where congestion can threaten the efficient operation of information systems, has been studied in economics and information systems literature, Recent explosion of the Internet ana proliferation of multimedia content over the Internet have rekindled the research interest in designing pricing schedules for differentiated information services, In order for the information system to effectively serve users having heterogeneous needs, pricing rules for discriminated services should be considered. At the same time, when individual users' interest does not align with that of the organization that individual users belong to, organization-wide pricing policy should be devised to improve the value of the services rendered by the system. This paper, using a priority queuing model, addresses the need for such on incentive-compatible pricing for different information services.

漢文科 ‘논술형 문항’ 개발에 관한 小考

김용재Yong-jae, Kim) 성신여자대학교 교육문제연구소 2016 교육연구 Vol.67 No.-

이 글은 중등교육 ‘漢文’ 교과에서 다뤄질 수 있는 ‘論述形 問項 개발’ 에 초점을 맞추어 연구된 것이다. 현재 대부분의 일선 중등학교 현장교 육은 입시 위주의 교육에 편중된 나머지, 암기나 지식전달에 몰입되어 이뤄지고 있다. 이러한 학교현실과는 달리 우리나라의 각 대학에서 제시 하고 있는 입시 경향과 각종 정책에 따르면, 학습자의 종합적인 사고력과 이해력을 증진시킨다는 명분하에, ‘論述’을 또다른 평가유형으로 권장 하고 있는 실정이다. 그러나 敎育課程이 있으면 그에 부합하는 교육성취도 평가가 짝지어질 수 있듯이, 교수학습의 모형이 있어야만 그에 따른 교수학습 평가가 부합되는 것 또한 당연한 일이다. 그러나 학교 현장에 서의 교육은 지식전달과 이론 중심의 主知主義에 닫혀있는데도 불구하 고, 학습자의 창의력과 사고력 그리고 이해력과 분석력을 종합적으로 판단하겠다는 논술 유형을 평가의 한 축으로 제시하는 것은 先後가 맞지 않아 보인다. 중등학교 현장교육에서 ‘논술’ 유형을 하나의 평가群으로 도입/실행하기 위해서는 우선 그에 대한 전제로서 수업방식부터 토론과 논술이 유도될 수 있도록 전환되어야 한다. 실제 수업은 교과서 내에서 다뤄지는 교육과정 요소들을 암기하는 것임에 불과한데, 정작 평가는 서술이나 단답 형의 수준을 넘어 논술까지를 요구한다는 점에서 상호 간의 균형과 선후가 맞지 않다. 그럼에도 불구하고, 漢文 교과에서 논술평가가 가능한 유형이 무엇인지를 선제적으로 고민하고 개발하는 것은 어쩌면 유의미한 일이 될 수도 있다. 왜냐하면, 漢文 교과만이 갖고 있는 과목의 특성과 성격이 ‘論述’ 평가에 부합할만한 부분이 적절하기 때문이다. 한편, 기존 漢文 교과수업과 그에 대한 평가가 주로 객관식이거나 혹은 단답형 유형으로 이루어져 왔다. 그러나 漢文 교과가 언어생활과 비판적 가치관을 습득하기 위해서는 일정정도 자신의 견해에 대하여 논리와 체계를 갖추고 이를 서술시키게 만드는 논술형 문항 개발에 대하여 선제적으로 고민할 필요도 있다. 다만, 한문교과 내에서도 세부영역에 따라 문형이 달라질 수 있는 개연성에 초점을 맞춰야할 것이다. 이 글은 이러한 입장을 견지하고, 중등교육 한문교과에서 다뤄질 수 있는 논술형 문항의 몇 가지 예시를 선보이고자 하였다. This article is focused on the development of essay test items that can be dealt with in secondary school ‘Chinese textbook’. At present, most of the frontline secondary school field education is concentrated on entrance exam oriented education, and is carried out in a way that is immersed in memorization or knowledge transfer. In contrast to the reality of this school, according to the entrance exam tendency suggested by each university and the policy dimension of the secondary education, the ‘discussion’ is recommended as another evaluation type in the sense that it promotes the comprehensive thinking and understanding of the learner. However, as the curriculum can be matched with the corresponding evaluation of educational achievement, it is also natural that the teaching and learning evaluation according to the model of teaching and learning is matched. However, the on - site education is carried out through knowledge transfer and theory - centered education. It is not right and wrong to evaluate the essay exam to comprehensively judge learners creativity, thinking ability, comprehension and analytical ability. In order to introduce and execute the essay test as an evaluation method in the secondary school field education, the premise must be changed so that discussions and essays can be derived from the teaching method. Practical lessons are merely memorizing or acquiring the elements of the curriculum that are handled in the textbooks, and evaluation is not appropriate for the balance and prosperity in that it requires essay writing beyond the description or short answer. Nevertheless, preliminary thinking and development of what types of essays can be evaluated in Chinese textbooks may be meaningful. This is because the characteristics and the nature of subjects that only Chinese textbooks have are appropriate for essay examination. This article holds this position and shows some of the essay test questions that can be addressed in secondary school Chinese textbooks.

「천변풍경」의 담론 특성 연구

김용재(Kim Yong-jae) 국어문학회 2007 국어문학 Vol.42 No.-

The purpose of this study was to make it clear the feature of discourse in The Landscape along the Riverside(Cheonbyeon-Punggyeong). This work described a landscape of the riverside for a year of 19308 and shaped more than thirty persons under orderly plot and properly controled narration. Characters were divided into three: the 1st group was like clerical staff Min and the owner of a linen shop, representing the middle class; the 2nd group, women centering Jeom-ryong's mother; the 3rd group, the humble class who had come to Seoul like Jae-bong and Chang-soo. These groups of persons were in the foreground to the readers through alternating between focalizer and narrator. The story connected with the mood of the seasons, didn't generally approach of modem reality, and focused on revealing the dailiness of the persons and the aspect of the community life. Thus, the change of time was analyzed into repetition and circulation. The narrator showed the 1st group denial and caricature, the 2nd the warmhearted and objective attitude, and the 3rd affirmation and expectation, focusing on the humble class's community life in the modem times. Especially, Jae-bong and Chang-soo played essential parts. This novel centered on embodying speciality through the equipment such as rumor, observation and peep while weakening narrativity. In addition, inserting the discourses to induce readers contributed to the story connection and the embodiment of space. Cheong-kye riversides community's city life was described through the method of daily discourses. This dailiness was a way of experience in the modern times and reflection of the prevailing society. It could not be disregarded that the feature of discourse enlarged the spaciality through the structure of circulation and repetition.

MgO의 전자선 증착율에 따른 PDP 방전 특성 분석

김용재,권상직,Kim, Yong-Jae,Kwon, Sang-Jik 한국전기전자재료학회 2007 전기전자재료학회논문지 Vol.20 No.8

The effects of the evaporation rate of MgO films using an electron beam on the MgO properties and the discharge characteristics of a plasma display panel (PDP) were investigated and analyzed. MgO films were deposited with the various MgO evaporation rates. The MgO properties such as the crystal orientation, the surface roughness, and the film structure were inspected using XRD (X-ray diffraction), AFM (atomic force microscopy). From the experiments and Paschen law, the maximum value of the secondary electron emission coefficient $({\gamma})$ was obtained at the evaporation rate of $5{\AA}/sec$. The XRD results and cathode-luminescence (CL) spectra show the ${\gamma}$ values are correlated with F/F+ centers of the molecular structure of MgO films. The minimum firing voltage and the maximum luminous efficiency were obtained at an evaporation rate of $5{\AA}/sec$. In the MgO film deposited at $5{\AA}/sec$, the (200) orientation and F+ center were most intensive.

조선시대 反양명학 문헌 조사 및 추출을 통한 양명학 비판 내용의 성향 분석과 反양명학 사조의 흐름에 나타난 특징 연구[2]

김용재(Kim, Yong-Jae) 한국양명학회 2015 陽明學 Vol.0 No.40

이 글은 조선시대에서의 양명학 존재 여부와 양명학 비판 양상을 『韓國文集叢刊』 등의 1차자료의 원전(문헌)들을 찾아 逆추적하여 그 의미와 성격을 규명하는데 있다. 이는 한국양명학에 대한 기존 연구 대부분이 문헌자료에 대한 出處나 典據없이, 임의의 어떤 인물을 설정하고 그 인물에 대한 양명학적 성격이나 특징을 규명하는 방향으로 치달아 왔다는 한계를 극복하기 위한 경학적 연구의 嚆矢라 하겠다. 따라서 필자는 『한국문집총간』 과 ‘김제문화원’에 소장되어 있는 1차 (원전)자료 안에서 ‘양명학 비판’과 연관있다고 판단되는 18人을 선별하고, 이들 문헌에서 논의되었던 양명학 비판 양상을 분석하여 조선시대의 양명학 비판 양상이 갖는 특징을 찾아보는데 주력하였다. 그런데 18인의 문집에 나타난 문헌자료를 찾는 것은 그 연구범위가 매우 광활함으로 인하여, 필자는 2011년 1차년도 旣연구성과로서 조선에 양명학이 유입되는 시기부터 ‘退溪’와 退溪門人가운데 ‘서애 류성용’까지를 범위(7名)로 한정하고, 「조선시대 反양명학 문헌조사 및 추출을 통한 양명학 비판 내용의 성향 분석과 反양명학 사조의 흐름에 나타난 특징 연구(1)」라는 제목으로 연구결과를 발표한 바 있으며, 본고는 그 두 번째 편에 해당한다. 따라서 본 논문은 그 후속작업으로서 17세기 ‘南溪朴世采’로부터 18세기 ‘南唐韓元震’, 그리고 19~20세기 초 ‘石亭李定稷’에 이르는 10名의 유자들이 견지했던 양명학 비판양상의 문헌목록을 조사하고, 원전자료에 입각하여 그 특징을 찾아보는 데에 연구의 목적이 있다. 그러나 방대한 원전(문헌)자료 목록과 분석이 병행되어야 함의 이중고를 극복하기 위하여, 拙稿에서는 反양명학이론이 강렬했던 위 3명(박세채ㆍ한원진ㆍ이정직)의 문헌을 중심으로 論旨를 전개하였다. This paper tries to recover and trace back the aspects of criticisms of Yangming studies in Joseon Dynasty through primary sources (documents, original works), such as “Korean Literary Collections (韓國文集叢刊)” etc. This can be considered the preliminary step to overcome the limitations of the current research on Yangming in Korea in which the majority are carried out without sources or original references, only by choosing some optional figures and considering the characteristics of their thoughts on Yangming. Therefore the author selects 18 figures supposed to be related to ‘the criticisms over Yangming’ from original texts collected in “Korean Literary Collections” and ‘Kim Je cultural academy’, analyzing their criticisms over Yangming studies through their arguments in those documents and then finding the characteristics of the criticisms over Yangming studies in Joseon Dynasty. However, since the scope of the work of searching for documents compiled in those 18 figures’ collected works is really extensive, in 2011 the author had carried out the first part of the research which was limited to the period from the introduction of Yangming studies into Joseon, through Toe-gye (退溪) and his disciples, to ‘Seo-ae Ryu Seong Yong’, and this paper, named ‘Analysis of tendency of criticism over Yangming studies and research on characteristics displaying from anti-Yangming studies (through investigating and extracting anti-Yangming study documents of Joseon Dynasty)’ (1) can be considered the second part of this research. Therefore this paper, as the succeeding work, has the purpose of investigating the list of documents criticizing Yangming of 10 Confucian scholars, from Nam-gye (南溪) Park Se Chae (朴世采) in 17th century through Nam-dang (南唐) Han Won Jin (韓元震) in 18th century to Seok-jeong (石亭) Lee Jeong Jik (李定稷) who lived in the late 19th century to the early 20th century, and searching for their characteristics. However, in order to overcome the difficulty of analyzing a large number of documents, the author would deploy the arguments focusing on the documents of 3 figures named Park Se Chae, Han Won Jin and Lee Jeong Jik whose anti-Yangming thoughts are truly strong.