IMT-2000의 다층셀 구조를 위한 시뮬레이션 모델에 관한 기초연구

박덕규 목원대학교 자연과학연구소 1998 自然科學 硏究論文集 Vol.7 No.-

본 연구에서는 'IMT-2000 무선망 시뮬레이터'구성을 위한 제반 파라미터, 핵심기술의 추출 및 성능평가를 위한 자료를 제시하여 IMT-2000구현을 위한 기반자료를 창출한고저 한다. 더욱이 IMT-2000의 무선망에서 구축되는 다층 셀구성의 효과적인 배치를 위하여, 기존의 채널할당 알고리즘과 핸드오버 알고리즘을 비교분석하여 IMT-2000시스템 실현을 위한 기초연구를 수행하였다. In this study, it is retrieved that the core contents and parameters to build a radio-simulator of IMT-2000. In addition, fundamental data to evaluate the performance of the simulator are generated. In order to obtain the effective placement of Multi-layer Cell, this paper also compared the characteristics of algorithms for distributed dynamic channel assignment strategies. The results from this process must be important background for the sake of realization of IMT-2000 in the near future.

차세대 이동통신시스템에서의 채널할당 알고리즘 및 시뮬레이터 개발에 관한 연구

박덕규 목원대학교 자연과학연구소 1999 自然科學 硏究論文集 Vol.8 No.-

최근에 국내에서 이동통신 서비스에 관한 수요가 폭발적으로 증가하고 있다. 이와 함께 차세대 이동통신(IMT-2000)에서 성능평가를 위한 시뮬레이터의 제작 및 표준화에 대한 요구가 대두되고 있으며, 국가적인 계획으로 차세대 이동통신에 대한 핵심기술을 얻기 위하여 많은 노력을 기울이고 있다. 본 논문에서는 차세대 이동통신의 실현을 위하여 가장 중요한 역할을 차지하는 시뮬레이터의 제작, 필요한 파라메터의 추출 및 채널할당 알고리즘에 대한 기초 연구를 수행하였다. In recent years, the demands of mobile communication services habe been explosively increasing in our country. On the other hand, IMT-2000 is expected to be a standard mobile service and a simulator development for performance analyses. Therefore, we should offer a great deal of efforts to attain the core technology of IMT-2000 as a national strategic plan. At this point of time, this paper including simulator development, parameter reterival, and performance analyses plays one of the most important roles for realization of IMT-2000 in the near future.

과학전 출품작과 현장학습의 연계성에 관한 연구

박행신,오덕철,김원택,김규용,현진오,정충덕 濟州大學校 師範大學 科學敎育硏究所 1987 科學敎育 Vol.4 No.-

In this paper, we report some sorts of result obtained by investigating the exhibits which had been submitted for "The National Exhibition of Science"and "The Science Exhibition for the Students of Cheju-do"during the last ten years and by putting the questions to the science teacher of the teacher of the middle and high schools in Cheju-do. Up to the half number the exhibits are occupied by the field of physics and biology. Almost the exhibits (above 90%) have the contents related to those of the current curriculum. However, 30.2% of the respondents only believe that their students may put the exhibits to practical use in learning. Many respondents replied that they could have not participated in the exhibition of science because they were in heavy duty and the fiscal support were not only so limited but also not sufficient enough to make an excellent work.

생체신호 처리용 지능형 ASIC 칩 개발

박차훈,최덕규,김태선 경운대학교 산업기술연구소 2002 産業技術硏究論文誌 Vol.5 No.1(A)

The proposed enhanced telemetry IC is verified with Altera FPGA chip (EPF10K20RC240-4) and layout with 0.6㎛ CMOS n-well process technology. For the VLSI design, a high level language was used, decreasing layout time by a factor of four. They resulting design, performed with a combination of Synopsys behavioral and structural code. The digital simulator used was VHDL logic simulator running under MaxplusⅡ.

우측 귓바퀴 뒷면에 발생한 혈관평활근종 1예

박수정,송현정,김주용,김창덕,김창욱,이규석 대한피부과학회 2006 大韓皮膚科學會誌 Vol.44 No.4

LCD의 회색 준위 상관 색온도 보정

최덕규,박차훈,김태선 경운대학교 산업기술연구소 2002 産業技術硏究論文誌 Vol.5 No.1(B)

At the present time, the LCD (liquid crystal display) not only emitsless radiation and consumes less power, it also takes up less space allowing for a more comfortable work environment. This paper looks into characteristics of LCD's CCT. We propose the LUT (look-up table) which adjust the three primary colors'digital input value, for maintaining the fixed value of correlated color temperature. LCD's CCT is maintaining about 6500 K, which is the standard CCT of display systems. Moreover it is the same as the former LCD's luminance that LCD's with using the LUT. In addition, we confirm that the color reproducibility of LCD using the proposed LUT become much accurate than a conventional LCD.

심낭삼출을 동반한 CREST증후군 1례

윤덕구,박승국,박근용,전영준,이인규,박창호 啓明大學校 醫科大學 1986 계명의대학술지 Vol.5 No.2

CREST syndrome is variant of scleroderma characterized by calcinosis, Raynaud's phenomena, esophageal dysmotility, sclerodactyly & telangiectasia. In the past, it was believed that CREST patients live longer than scleroderma because rare involvement of internal organ, but recently noted that CREST patients may die early by involvement of internal organ. Recently, authors experience one case of CREST syndrome associated with pericardial effusion, herein presenting our experience and literature and reviewed.

階層別 住居基準 設定에 關한 硏究

吳德成,朴贊圭 충남대학교 공업교육연구소 1984 論文集 Vol.7 No.1

Until now, most of the studies on the housing problems have been dealed with their quantities. But radical growth of urban living level owing to economic, social and technical developments makes changes in the basic concepts of living .So the studies on the qualities of housing have come to be required. The aim of this study is to establish the standards for dwelling unit area according to family types, and further to help future planning of housing. In the process of the study, the authors divided families into 5 types, and established the standards of dwelling unit area by measuring the sizes of each rooms in existing dwelling units and by designing normal sizes of each rooms with the modularc oordination system on the basis of arrange-ment of furnitures, and compared the results with foreign standards.(Japan',FHA,IFHA, England).

염소 저장탱크의 가스누출 예측 및 제어를 위한 스크리닝 방법론

송덕만,박종규 울산대학교 1998 공학연구논문집 Vol.29 No.2

본 연구는 화학장치설비 중 염소 저장탱크의 누출유형에 따른 누출물의 물성자료들을 포함하는 누출원모델, 분산모델, 기상 및 지형자료들을 TSCREEN 모델에 입력시켜 염소 가스의 풍하거리에 따른 1시간 평균 최대 지표면 농도를 산출함으로써 유해독성가스의 누출 예측 및 제어를 위한 스크리닝 방법론을 개발하기 위한 것이다. 본 스크리닝 방법론에서는 저장탱크 및 압력방출장치로부터 누출되는 기상 및 2상 흐름의 연속 및 순간 누출에 대한 대기분산 모델링 절차가 고려되었다. 연구결과로부터, 공기보다 무거운 가스의 분산유형은 누출물의 상태(기상 및 2상 흐름), 누출 조건(온도, 압력), 누출물의 물리·화학적 특성, 누출유형(연속 및 순간누출)에 영향을 받고 있으며, 특히 누출물의 초기(감압) 밀도 및 누출속도 뿐만 아니라 풍속 및 대기안정도에 커다란 영향을 받고 있음을 알 수 있었다. 결론적으로, 지표면 농도는 풍속이 낮을수록 대기안정도가 안정할수록 증가하고 있음을 알 수 있었다. 본 스크리닝 방법론은 보다 다종다양한 시나리오들을 선정하여 보편적으로 적용할 수 있는 Sliding Scale 방법론을 개발함으로써 정교한 해석 모델의 적용시 예비 가이드라인으로 활용될 수 있으리라 사료된다. This study was performed to develop the screening methodology for prediction and control of hazardous/toxic gas releases by estimating the 1-hr average maximum ground-level concentration of Cl₂gas vs. downwind distance by incorporating source term model including the general/physical properties of released material and release mode of the Cl₂storage tank of the chemical plant facilities, dispersion model, and meteorological/topographical data into the TSCREEN model. For this screening modeling, dispersion modeling procedures for continuous and instantaneous releases of the gas phase and two-phase flow from the storage tank and pressure relief valve were considered. As the results of the study, it was found that dispersion modes of the dense gas were affected by the state of the released material(gas phase, two-phase flow), the released conditions(temperature, pressure), physical-chemical properties of released material, and the the released modes(continuous and instantaneous releases), and especially largely affected by initial(depressurized) density of the released material and release emission rate as well as the wind velocity and the atmospheirc stability. Consequently, it was found that the maximum ground-level concentration increases as the wind speed is low and the atmospheric stability is stable. It was thought that this screening methodology can be useful as a preliminary guideline for application of the refined analysis model by developing the generic sliding scale methodology for various senarios selected.

과학적 창의성 신장을 위한 교사발문의 개발 및 적용 : 고등학교 지구과학 교과 중심으로

조규성,박미숙,정덕호 경북대학교 과학교육연구소 2009 科學敎育硏究誌 Vol.33 No.1

This study aimed at designing an effective earth science instruction which would help to improve students' scientific creativity using the questioning strategies. The developed questioning strategies were applied to 153 students of 10^(th)~11^(th) grades from March, 2004 to February, 2006. The Reaction Evaluation of Educational Program was used for students' reponses on these questioning strategies. And the Creativity Test developed by the Korea Institute for Aptitude Test was used for the changes of students' scientific creativity. The students responded that these questioning strategies improved students' scientific creativity, and those did not promoted interaction between the teacher and the students. After implementing these questioning strategies, students' analogical ability of language was evaluated the largest score among the 6 categories of scientific creativity. The survey about students' scientific creativity showed that there are meaningful differences between before and after implementing these questioning strategies : analogical ability of figure, analogical ability of language, reading comprehension ability. 본 연구는 고등학교 지구과학 수업을 중심으로 발문 전략을 수립하고 이를 적용함으로써 학생들의 과학적 창의성을 신장시키는데 그 목적이 있다. 2004년 3월에서 2006년 2월 기간까지 고등학교 학생 153명을 대상으로 하였다. 프로그램 반응 평가지를 통하여 발문전략에 관한 학생들의 반응을 살펴보았다. 또 한국적성검사연구소에서 제작한 창의성 검사를 통하여 학생들의 과학적 창의성 신장 여부를 분석하였다. 학생들은 발문전략을 적용한 교수학습 방법이 과학적 창의성을 신장에 도움이 되었다고 반응하였지만, 교사와 학생 사이의 상호작용 증진에는 효과가 없었다고 반응하였다. 발문 전략을 적용한 교수학습의 결과 언어유추능력 항목에서 가장 많은 향상을 보인 반면, 계획적 분석능력 항목에서 가장 작은 향상을 보였다. 대응표본 t검정 결과 도형유추능력, 언어유추능력, 문장이해력 항목에서 유의미한 차이를 보였다.