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박광현 忠州大學校 2012 한국교통대학교 논문집 Vol.47 No.-
The design for digital circuits of chaotic composition function which is used for the key-stream generator is studied in this work. The overall design concept due to the mathematical model of chaotic key-stream generator is to be the explained in detail, and also the discretized truth table of chaotic composition function is presented in this paper.
박광현 韓國交通大學校 2013 한국교통대학교 논문집 Vol.48 No.-
In order to design of the chaotic key-stream generator possessing the chaotic dynamics and more long period(or cycle), a linear-feedback shift register(LFSR) is connected to the circuit of chaotic composition map in this work. As a result, the digital circuits and discretized truth table for the chaotic key-stream generator is presented also.
무리수 키를 사용하는 혼돈 맵의 2진 순서 발생기 구현
박광현 忠州大學校 2007 한국교통대학교 논문집 Vol.42 No.-
In this work, a sort of generation algorithm for chaotic binary sequence is presented, and it has been also shown that chaotic binary sequence generated by piecewise linear one-dimensional chaotic map(tent map) with the inputs of irrational nembers is more longer than random binary sequence obtained from mLFSR(maximum-length Linear Feedback Shift Register). The tent map of 8-bit finite precision representation used in this brief is implemened with the digital device, 256×8 ROM(Read Only Memory).
박광현 忠州大學校 2010 한국교통대학교 논문집 Vol.45 No.-
The iterative process can be viewed as a feedback loop in the system and the repeated composition of the same functions. The digital circuit design for the iterative process of two chaotic functions-the saw tooth function and tent function-are built on the concept of the composition of functions, and is presented in this paper.
다운증아 어머니의 기대성향이 비계화 교수와 문제해결학습에 미치는 효과
여광응,윤숙경,박현옥 한국특수교육문제연구소 2003 특수교육저널 : 이론과 실천 Vol.4 No.1
이 연구는 어머니-다운증아의 상호작용을 통한 문제해결과정에서 어머니의 기대성향이 어머니 교수중재의 양과 수준에 미치는 영향과 다운증아의 적목피라미드 문제해결과제에 미치는 효과를 밝히는데 두고 다운증아 어머니의 기대성향에 따른 어머니의 비계화 교수와 아동의 문제해결학습간의 관계를 탐색하고자 하는 것으로,만 6세인 다운증아 남아 3 명과 여아 3명인 전체 6 명 그리고 그 어머니들을 대상으로 하였다. 어머니-아동의 문제해결상호작용과정을 비디오로 촬영하여,어머니의 교수중재는 중재 수준,중재 양,유관 및 비유관 여부를 중심으로 그리고 아동의 문제해결은 성패를 중삼으로 양적 · 질적 분석을 병행 하였다. 연구결과 어머니의 기대성향이 긍정적일수록 아동의 문제해결 성패에 기반하여 중재 양과 중재 수준을 조절하는 유관 중재를 많이 사용하고 문제해결학습에서 부정적 기대성향의 다운증 자녀보다 더 긍정적 학습결과를 보인다. 또한 어머니의 비계화 교수 변인과 자녀의 문제해갤학습 변인사이에는 상호 관련작 양방향성 효과가 있다. The purpose of this study was to examine the relationships between maternal expectancy and maternal use of scaffolded instruction and problem-solving skills of children with Down syndrome. For this purpose, three boys and three girls with Down syndrome whose age were six years old and their mothers participated in this study. The mother-child interaction regarding problem-solving tasks was videotaped and analyzed. The qualitative and quantitative analyses were conducted to find out the condition and quantity of scaffolded instruction used by mothers, and degree of their contingency of the tasks. In addition, it was analyzed whether these children resolved given problems successfully or not. As a result, it was found that the mothers who had more positive expectancy relied more on contingent intervention that regulated the quality and quantity of instructions based on the success or failure of their child' s problem solving tasks, and that their children produced better learning outcome than the children of the mothers who had more negative expectancy. In addition, two-way interrelationships between the scaffolded instruction variable of the mothers and their children ’ s problem-solving learning variable were found.
박광현 한국교통대학교 2014 한국교통대학교 논문집 Vol.49 No.-
New mathematical model of the tent function is defined and chaotic binary generation circuit using above model is designed at the this work. The discretized truth of the tent function as a one-dimensional chaotic is presented, and design procedure of chaotic binary generation circuit is presented also, as a result, overall chaotic key-stream generator is showed in this paper
박광현 忠州大學校 2009 한국교통대학교 논문집 Vol.44 No.-
Design method of a logistic map which is one of chaotic map is proposed. In order to achieve the discritization of logistic function, the truth table of discretized tent function is used as the progress of inguiries. The proposed design method not only includes the very simple processes, but also has easy hardware implemention. In this work, the overall concept of logistic map design is to be explained in detail while the truth tables of discretized chaotic maps is given partially.
한식 잔반처리를 위한 호기성 미생물의 분리 및 그 분해효과
김광현,김지연,이광배 동의대학교 기초과학연구소 2000 基礎科學硏究論文集 Vol.10 No.1
For the treatment of Korea food-wastes, three mesophilic and one thermophilic bacteria were isolated from soil and fermented fertilizers. The thermophilic Streptomyces sp. strain WF021 produced two enzymes which were a protease and a lipase at 55℃. The mesophilic Bacillus sp. strain WF024 produced four enzymes which were a protease, a lipase, a amylase and a cellulase when the strain was grown both at 30℃ and 55℃. The Bacillus sp. PY123 had produced three enzymes which were a protease, a cellulase and a lipase at 30℃. The Bacillus sp. strain CM1 produced three enzymes which were a protease, a amylase, and a cellulase at 30℃. The bacteria were grown in media containing 6% NaCl at least and did not have antagonism each other. The four isolates treated much more food-wastes than referance strains did. In a flask without aeration, three reference strains treated 15.4% of food-wastes, while four isolated treated 23.7% of food-wastes. In a flask with aeration, food-wastes were treated 67.3% by four isolates, and 64.3% by three reference strains, but 53.9% without bacteria. However, food-wastes were treated about 78% in a 200ℓ-reactor made by Siwon Co., while 65.8% in a 20ℓ-reactor made by Sanyo Co.
朴廣炫 충주대 2000 한국교통대학교 논문집 Vol.35 No.2
Chaotic key stream generator is implemented for the purpose of the generation of a sequences which are pseudo-random sequences. Since any sequences generated from the deterministic chaotic transformation and primitive characteristic polynomial have the properties of chaotic dynamics, a chaotic key stream generated from the key stream generator with a chaos function satisfy the randomness postulates. To obtain a ciphertext which appears like PN-sequences, a multiplexed random sequence generation using the saw-tooth transformation is showed.
송호연,고광균 순천향대학교 교수학습개발센터 2004 Journal of Soonchunhyang Medical Science Vol.10 No.3
The purpose of this study is to find a Mycobacterium tuberculosis specific protein for a new diagnositic method of tuberculosis. We found a protein reacting with Kris antiserum(goat antiserum against Mycobacterium intracellulare) in culture filtrate of Mycobacterium avium LR114F by Western blot. The N-terminal amino acid sequence of this if compared with that of Mycobacterium tuberculosis using TIGR Database. It is cloned, expressed in E. coli. Recombinant TB-14 protein of M. tuberculosis is composed of 148 amino acid including 30 amino acid of signal peptide and it showed 78% of homology with M. avium. These results suggest that recombinant TB-14 protein may be useful for the devolpment of new diagnostic method for tuberculosis.