상간이동촉매 존재하의 여러 유기용매에서 Phenethyl Bromide와 칼륨염들과의 치환반응에 관한 연구

황규탁,김인환,김정성,임태훈 대구대학교 기초과학연구소 1996 基礎科學硏究 Vol.13 No.-

The catalytic effects and the degree of substitution for the reactions of phenethyl bromide with potassium salts in a solid-liquid two-phase system under phase transfer catalysts were investigated in aprotic nonpolar solvent (toluene) and in aprotic polar sovent (DMF) at 35 캜 Tetrabutylanmionium bromide(TBAB), tetrapropylammonium bromide(TPAB), 18-crown-6-ether-(CR), dicyclohexyl-18-crown -6-ether-(DCHC) were used as phase transfer catalyst. In these reactions, the degree of substitution were increased in a aprotic polar solvent than in aprotic nonpolar solvent. TBAB, DCHC showed more excellent catalytic effects than that of TPAB, CR. These results was considered to be attributed to the hydrophobic interaction of the catalysts with in organic layer. From all of the observed results, the strength of nucleophilicity showed the following trend: Cl-KOS > SCN- > CH3COO- > C6HsC0oo

한글 ·한자 Word processing 시스템에 關한 硏究

沈在洪,柳煌彬 光云大學校 1984 論文集 Vol.13 No.-

In this paper, a Word processing system which processes the sentences composed by Korea, Chinese and English words is studied. In this system, every word is coded uniformly in two bytes and especially Chinese words are processed by dictionary. Thus, we can enhance many properties : at least as much as half memory size can be saved, more over high processing speed, program modulization and automata design for additional commands can be achieved. In order to implement this processing system efficiently, an algorithm and program explanation for output form of end-user destination are added.

Token Ring 방식 근거리통신망 구현에 관한 연구

이대영,유황빈 慶熙大學校 1986 論文集 Vol.15 No.-

Local Area Network (LAN) for sharing computer resources in fixed standard area is a very useful communication formula that can be available as much as 255 units in the neighborhood of 0.1-10㎞. There are 3 type LANs such as Bus, Star, Ring type. This paper studies about the Token King method, the construction of Local Area Net work, the mathematical expression for NlU(Network Interface Unit) performance and the modeling of network.

The Effects of Substituent Groups of Hydrazones : HMO energy, Polarographic potential and UV(λmax) HMO에너지, 폴라로그래프의 피이크 포텐셜, UV(λmax)

Howang, Kyu Tak,Hong, Seok 大邱大學校再活科學硏究所 1981 再活科學 Vol.3 No.1

Semicarbazone의 置換基效果를 폴라로그래프의 피이크퍼텐셜과 UV의 λmax 으로 비교 설명되었으며, 또한 LUMO와 HOMO의 에너지와 관련지웠다. 이때 메틸기의 수가 증가할 수록 Semicarbazone의 환원성이 커졌으며, λmax은 장파장쪽으로 이동되었으나, Δm은 이외로 증가되었다. The effects of substituent groups of semicarbazones were compared with polarpgraphic peak potentials, λmx,s of UV, which were related to LUMO energy and HOMO energy difference, Δm. The substituent effects of semicarbazones show that the more increased the number of methyl group, the more easily reduced alkyl semicarbazones generally. λmax,s of alkyl semicarbazones also shifted to long wave, but Δm was increased exclusively.

『月に吠える』論

黃珍(Howang Jin) 대한일어일문학회 2008 일어일문학 Vol.39 No.-

『月に吠える』の「詩作中断期」と〈新生〉体験

?珍(Howang Jin) 대한일어일문학회 2009 일어일문학 Vol.41 No.-

국가 재정지원사업을 통한 공업계 특성화고등학교의 발전 사례

黃載鎬(Jaeho Howang),金秉柱(ByoungJoo Kim) 동아인문학회 2014 동아인문학 Vol.27 No.-

특성화고는 산업현장에서 필요로 하는 우수한 기능 인력을 양성함으로써 우리나라의 경제 발전에 기여하였다. 그러나, 1990년대 이후 특성화고로서의 역할과 기능을 정립하지 못하고, 직업교육과 진학교육의 혼란에 따른 정체성 위기를 겪어 왔다. 이 연구는 A공고에서 5년 동안 시행한 국가 재정지원 사업 “중소기업 특성화고 육성사업”의 사례와 효과를 분석하였다. A공고 사례를 통하여 특성화고 발전 방향을 제시하면 다음과 같다. 첫째, 특성화고 정체성 확립에 기반을 둔 산업체 수요에 부합하는 특성화 방향 설정 및 특성화 분야를 선정하여야 한다. 둘째, 특성화사업 이해관계자인 학생, 학부모, 교원, 산업체, 정부, 사회의 특성화관련 요구 내용 및 의견을 수렴하여 사업에 반영한다. 셋째, 특성화분야 산업체가 요구하는 기술과 인성의 Trend 분석을 기반으로 특성화 전략 및 추진과제를 설정하고 실행하여야 한다. 넷째, 특성화 중간평가 및 컨설팅을 통하여 교육수요자 만족도를 향상 시키고, 특성화사업의 효율성을 극대화하는 방안을 강구하여야 한다. 다섯째, 산업수요 맞춤식 교육으로 인재를 양성하고, 先취업 後진학이 가능한 지속성장 가능 경력 경로를 개발하여 산업체와 학교가 상호 유기적인 산학협력 체제를 구축하여야 한다. 여섯째, 차별화?특화한 교육 컨텐츠나 시스템을 구안하여 각종 국가 재정 지원사업에 공모?선정 후 지원되는 예산 확보로 수월성 교육을 실시하여야 한다. This study analyzed a case of development process of a technical high school supported by a national funding project. The object of this study is to analyze the chief elements of success of specialized technical high schools supported by the national funding project and to help specialized schools draw development plans. The survey about the chief elements of success of the specialized technical high school was carried out targeting employees in industry, teachers and students. The development plans for the specialized technical high schools which are based on the results of the study and research are as follows. First, excellent student resources should be secured through a careful public relations strategy to recruit new students. Second, the departments and the curriculum should be changed in accordance with system suitable for the specialized high school. Third, the students" employment capability should be strengthened and the employment rate should be raised. Fourth, teaching and learning method should be improved by running differentiated programs. Fifth, school administrator should give strong guidance to secure educational budget by winning contracts of government projects.

β-bromoethylbenzene과 置換피리딘類의 反應에 關한 速度論的 硏究

황규탁,유영억,임태훈 大邱大學校附設 基礎科學硏究所 1989 基礎科學硏究 Vol.6 No.-

The rates and the activation parameters for the reaction of β-bromoethyl?benzene with. substituded pyridines have been measured in protic solvent (methanol) and aprotic solvents (DMF, acetonitrile, acetone) at 40℃, 50℃, and 60℃. The rates of reaction were increased with the electron donating power of substitutents, and the isokinetic relationships were seen between activation energy and activation entropy except for 4-amino pyridine in methanol. In the Hammet plot except 4-amino group, 4-cyano group and in the plot between logk and pKa except 4-cyano group, they were found as good linearity as following equations. log k=0.148pKa-6.605 (60℃ MeOH) log k=0.203pKa-6.198(60℃ DMF) log k=-0.763p-5.835(60℃ MeOH) log k=-1.084p-5.117(60℃ DMF) From all of the results for substitutent effects, solvent effects and application of Hammett plot, the reaction was found as a typical SN2 mechanism.

1,1,1-Triphenyl-2-Chloroethane과 Pyridine 類의 反應에 關한 反應速度論的 硏究

황규탁,구천길,이정환 대구대학교 기초과학연구소 1987 基礎科學硏究 Vol.4 No.-

The rates of the reaction of 1,1,1-triphenyl-2-chloroethane with pyridines in acetonitrile have been measured at 40℃, 50℃ and 60℃ and the activation parameter and the effect of substituent of pyridines were discussed. The rates increased with electron-donating power of substituents, and the isokinetic relationship was shown between ΔH≠ and ΔS≠. In the Hammett plot except 4-amino group 4-cyano group, and in the plot between logk and pKa except 4-cyano group, they were found as good linearity as following equations. logk=O.18pKa-2.99 logk=-O.14σ-2.11 (electron-donating group) logk=-0.10σ-2.11 (electron-attracting group) From these results, this reaction was found as typical SN2 mechanism with the rate of reaction is determinated by C…N bound-formation at transition state.

消費者 購買意思決定에 관한 考察 : 習慣型·學習型·商標忠誠型 購買決定을 중심으로

黃用哲 제주대학교 1993 논문집 Vol.37 No.1

This study decribes the opposite of complex decision maring-habit. Prior satisfaction with a brand may lead to repeat purchases and eventually to purchases based on habit. The consumer may find little need for information search and for evaluating brand alternatives. Recognizing a need will lead directly to a purchase. Therefore, habit is a way of ensuring satisfaction based on past experience search and brand eveluation. In this study, the process of habitual purchasing has been decribed. Understanding the process requires understanding the principles of consuner learning since learning theory focuses on the conditions that produce consistent behavior over time. Habit and learning lead to brand loyalty, that is, commitment to a certain brand because of prior reinforcement (satisfaction as a result of product usage). brand loyalty is the result of the consmer's involvement. Decision making was required at one time to select a brand. However, satisfaction with the brand's performance leads to the establishment of favorable attitudes and to repurchase over time. In this study, we would describe habitual purchase behavior, its characteristics and importance to the consumer. Learning theories would then be described and brand loyalty considered as an outcome of consuner learning The major contents of this study are summarized as follows. Habit, consumer learning, and brand loyalty are closely linked concepts. Habitual purchasing behavior is the result of consumer learning from reinforcement. Consumers will repeatedly buy what satisfies them best. This leads to brand loyalty. In a model representing habitual purchasing behavior, need arousal leads directly to an intention to buy, a subsequent purchase, and post purchase evaluation. Information search and brand evaluation are minimal Habit serves two important functions. It reduces risk for high involvement purchases and saves time and energy for low involvement products Concepts of learning are necessary to understand habit. The distinction is made between behavioral and cognitive approaches to learning. Behavioral learning forcuses on the stimuli that affect behavior and on behavior itself. Cognitive learning focuses on problem solving and emphasizes the consumer thought variables that influence learning within the behavioral school, the distinction is also made between classical and instrumental conditioning. Classical conditioning explains behavior based on the establishiment of a closs association between a primary and secondary stimulus. Instrumental conditioning views behavior as a function of the consumer's actions. Satisfaction leads to reinforcement and go an increase in the probability of repurchasing. The differant learning theories are also reflected in differing views of what constitutes brand loyalty. An instrumental conditioning approach suggests that consistent purchase of a brand is a reflection of brand loyalty. The cognitive school belives that behavior is on insufficient measure of loyalty. Attitudinal commitment to the brand is also required. The next study will focuse on the low involvement conditions that encourage spurious loyalty and inertia.