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가로장치물의 시각적 특성과 설계 의미를 위한 설계언어화에 관한 연구 : 메사츄세츠주 콩코드, 렉싱톤, 알링톤의 사례중심으로
권상준,김하종 청주대학교 산업과학연구소 2008 産業科學硏究 Vol.25 No.2
This research aims to find processes for developing the design language for the visual notes and design meaning of street furnitures. The research found as follows. 1) The design language implies to get how to represent condensed symbols of the street furnitures. 2) The configuration of the street furnitures has their visual note and design meaning of community identity, represented their own detail design language. 3) The detail design language are useful to solve the matters of what design elements of the street furnitures can be composed of the visual note and design meaning. 4) The detail design language can be applied to the pattern of tools of Microsoft Office Word.
p-Median문제 최적방안을 위한 실수 프로그래밍 공식화에 관한 연구
권상준,김하종 청주대학교 산업과학연구소 2008 産業科學硏究 Vol.26 No.1
This study aims to find a method how p-Median problem can enlarge the solution of allocation location model, solving the problem of the reasonable and practical location of allocation vertices changed into minimum cost for a competible central city or urban function, which can capacitate public facilities. To solve the problem, this study suggests a kind of real(cardinality) programming formation to treat the locational evaluation with locational quotient value of each vertices in p-Median problem.
권상준,김하종 청주대학교 산업과학연구소 2007 産業科學硏究 Vol.25 No.1
This research purposes to find a basic method how the traditional eight sceneries can be selected with rationale and to know the means what factors of the landscape structure and image of aesthetical sceneries can be composed of. This method could be applied to the Cheong-ju eight sceneries and be caught as follows. The landscape structure of Cheong-ju eight sceneries has complex corridors of landscape, which might imply balance and harmonization with nature and visual shape of an interesting scenery point. The landscape image of Cheong-ju eight sceneries has their own idiosyncrasy of visual shape, pattern, composition, which might be brought to preference and curiosity to the place of the aesthetical landscape. The characters of Cheong-ju eight sceneries have the representative image of Cheong-ju area where the scenery is beautiful and naturalness are plentiful to preserve countryside landscape.
Teitz-Bart 과정에서 각 정점의 입지적 가치를 지닌 GRIA에서의 평정 방안
김하종,권상준 청주대학교 산업과학연구소 2008 産業科學硏究 Vol.26 No.1
This study aims to find a method how to solve p-Median problem and to suggest on the process that GRIA(global regional interchange algorithm) can enlarge the solution of Teitz-Bart process model. The GRIA can develop fourth proceeding steps for solving the problem of the reasonable and practical location in the set of allocation vertices changed into minimum cost occurred from the distance of optimum nodal points. The locational theory of the GRIA can be a method to interchange processes to capacitate the cost and benefit of public facilities. To solve the problem, this study suggests a kind of the GRIA proceeding steps and tool to acquire the locational evaluation with locational value of each vertices in the Teitz-Bart process.
等誘電性 2成分溶媒系에서 鹽化알킬카르보닐의 加알코올 分解反應
柳俊夏,金良姬,成大東,朴現錫,嚴泰燮 東亞大學校 1990 東亞論叢 Vol.27 No.1
The nucleophilic substitution reactions of alkanecarbonyl chlorides with alchohols in the polar aprotic solventls have been studied by means of the conductimerical method. The results are as follows; 1. The order of magnitude of the second-order rate constants in the same substrate is acetyl carbonyl chloride>propionyl choride>X-valeryl iso-vareryl chloride. This is in full accord with the inductive effect by means of the polarizability effect that is due to connect with the σ-bond of alkyl radical to neigboring atom. 2. The reactionis proceeded through the S2 reaction mechanism from the analysis of the values of m and ℓwhich are obtained from the extended Grunwald-Winstein equation. 3. From the prediction on the More O'Ferrall plot the reaction mechanism is favored to the SN route. 4. As shown in the quantum mechanical model, the reaction mechanism is shown to favor an associative S2. 5. The reaction mechanism is in accord with an associative S2 reaction mechanism in consideration of the solvent effect exactly.
成大東,朴現錫,柳俊夏,金良姬,李鍾八,嚴泰燮 東亞大學校 1990 東亞論叢 Vol.27 No.1
Kinetic studies of nuclsophilic substitution reaction of dabsyl chloride with pyridines have been investigated at 30℃ in a range of methanol-acetonitrile bianary solvent mixtures. The order of magnitude fo reactivity is β-picoline > pyridine > 1.5-N D A > α-picoline to react with dabsyl chloride, especially in case of α-picoline, the reactivity revealed lower than others, it is suggestd that nitrogen atom of pyfidine ring has a steric hinderance by the neightboring methyl group. The value of ρ(-0.96∼4.59) and β(0.36∼0.67) associated with a change of substituent in the nucleophile are large and indicate a realtively advanced bond formation in the transition state. Solvatochraomic correlations were predicted the importance of bond formation transition state, showing a greater contribution of polaritypolarizability (π*) lone paired to hydro-gen bond donar acidity (α). We conclude that the reaction of dabsyl chloride with pyridine proceed via S2 type reaction mechanism, as well as the reaction of dansyl chloride pyridine.
트리플루오르에탄올 混合溶媒系에서 염화나프토일 分解反應의 Sn2轉移狀態 變化
嚴泰燮,成大東,柳俊夏 東亞大學校 大學院 1982 大學院論文集 Vol.6 No.-
The solvolytic rate constants of l-naphthoyl, and 2-naphthoyl chloride in TFE-EtOH and TEF-H₂O binary solvent mixtures have been measured at various temperatures. The rate constants for solvolysis in TFE-H₂O solvent mixtures are observed higher than in TFE-EtOH solvent mixtures. In the transition state naphthoyl chlorides have not peri-hydrogen dffect and also the l value of 2-naphthoyl chloride has lager one, therefore this reaction proceeds SAN reaction mechanism as shown in the potential surface diagram. It is in accord with that the reaction proceeds through the transition state of tetrahedral intermediate. The rate constants in TFE-EtOH solvent mixtures have shown higher in lager content of ethanol.
Zoon Ha Ryu,William Bentley 대한화학회 2008 Bulletin of the Korean Chemical Society Vol.29 No.11
The specific solvolysis rates of 2-chloro-2-(methylthio)acetone (3) at 25.0 oC, and 2-chloro-2-(4-methoxyphenylthio)- acetophenone (4) at 50.0 oC have been measured in more than 34 aqueous solvent mixtures including aqueous 2,2,2-trifluoroethanol (TFE), for 4, and 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP), and in TFE-ethanol. The kinetic solvent isotope effect in methanol and solvolysis rate ratios, at identical ionizing power in 40 (v/v)% ethanol/water compared with 97 (w/w)% TFE/water have been determined. Additional data were also obtained for solvolyses of other substrates related to this work. The investigation of structural effects, caused by the existence of neighboring sulfur-containing and carbonyl (C=O) groups, on the solvolytic reactivity and/or mechanism and the possibility for the stabilization of the solvolytic TS by the developing mesomeric cation, due to the role of the PhS-group, have been attempted using various Grunwald-Winstein (GW) parameter treatments. Regardless of -COPh or -COCH3 neighboring groups as neighboring group, the solvolytic reactions for both 3 and 4 were evaluated as reactions primarily influenced by the sulfur atom of the –SR group as the activator to make the positive polar TS. In particular, the solvolytic reactions of 4, having an electron donating p-OCH3 substituent, were indicative of the possibility of an ionization pathway with development of a mesomeric cation, stabilised by the sulfur atom and its attached group.
Stoichiometric Effects. Correlation of the Rates of Solvolysis of Isopropenyl Chloroformate
Zoon Ha Ryu,Young Ho Lee,Yunghee Oh 대한화학회 2005 Bulletin of the Korean Chemical Society Vol.26 No.11
Solvolysis rates of isopropenyl chloroformate (3) in water, D2O, CH3OD and in aqueous methanol, ethanol, 2,2,2-trifluoroethanol (TFE), acetone, 1,4-dioxane as well as TFE-ethanol at 10 oC are reported. Additional kinetic data for pure water, pure ethanol and 80%(w/w) 2,2,2-trifuoroethanol (T)-water (W) at various temperatures are also reported. These rates show the phenomena of maximum rates in specific solvents (30% (v/v) methanol-water and 20% (v/v) ethanol-water) and, variations in relative rates are small in aqueous alcohols. The kinetic data are analyzed in terms of GW correlations, steric effects, kinetic solvent isotope effects (KSIE), and a third order model based on general base catalysis (GBC). Solvolyses based on predominately stoichiometric solvation effect relative to medium solvation are proceeding in 3 and the results are remarkably similar to those for p-nitrobenzoyl chloride (4) in mechanism and reactivity.