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이찬민 ( Chan Min Lee ),정일용 ( Il Yong Chung ) 조선대학교 공학기술연구원 2009 공학기술논문지 Vol.2 No.3
Peroxodisulfates have been developed as low temperature bleaching agents for cotton to save the thermal energy. In this research we used the colar difference meter to determine the whiteness which booster peroxide will possibly make an effect on cotton at the low temperature process with different conditions agents, such as sodium hydroxide, sodium peroxodisulfate and potassium peroxodisulfate. The peroxide bleaching follows a laboratory experiments, using a statistical plan for three variables: (1) the concentrations of hydrogen peroxide (2) sodium hydroxide (3) the temperature of bathing. The purpose of this research was to use the response surface analysis method to evaluate the relative importance of actors providing optimum whiteness. A ridge analysis data on whiteness, results in 3-D surface diagrams for optimizing the concentrations of hydrogen peroxide and sodium hydroxide at about 42-52℃.
이찬민 ( Chan Min Lee ),정일용 ( Il Yong Chung ) 조선대학교 공학기술연구원 2009 공학기술논문지 Vol.2 No.4
A purpose of this research was to use the response surface analysis to evaluate the relative importance of factors providing simulated optimum ester-crosslinking of cellulose. In pursuit of these goals, we have treated cotton broad cloth with 1,2,3-propanetricarboxylic acid at different pH values. They were used with H3P04, NaH2P02, NaH2P04, Na2HP04, NaH2P02, Na3P04, catalysts to produce nonformaldehyde fabric finishes. Treatments were applied to all materials using a pad-dry-cure process. For the fully understood on the relationship of finish bath pH effect and cotton cellulose esterification, the relative concentrations of chemical species were calculated from ionization constants. In this research, the response surface analysis was used for the simulated mechanical limit values. The statistical parameters tested to correct reactants included amount of reaction and maximum degrees of wrinkle recovery, along with various concentration parameters. There were progressive changes in treated fabric wrinkle recoveries as agents and catalyst of pH levels decreased.
Chan Min Lee(李贊民) 한국경영사학회 2003 經營史學 Vol.30 No.-
The purpose of this study is first to identify the historical development of American accounting education since 16th century to the present. Prior to the Wharton School of the University of Pennsylvania at which first collegiate level of accounting course was offered in 1883, American accounting education was mostly conducted by Individual teachers and textbook authors and thereafter, private schools such as the Bryant and Stratton, and Packard business college. Since AAPA(American Association of Public Accountants) was organized in 1887, professional institutes such as AIA(American Institute of accountants), AAUIA (American Association of University Instructors in Accounting), AAA (Amencan Accounting Association), and AICPA(American Institute of Certified Public Accountants) have had a great effect on the development of accounting education in America. Recently AECC(Accounting Education Change Commission) awarded grants to the 11 selected universities to conduct changes in their accounting programs. The AECC identified desired capabilities, course content, and instructional methods for the education of professional accountants. Present accounting education in Korea can be improved by making the most of the AECC projects. Required competencies for the professional accountants should included communication skills, decision making skills as well as accounting knowledge, and active student participation through group work and case study is recommended.
통계학적 해석에 의한 BTCA와 Cellulose 에스테르 가교결합의 최적화
이찬민 ( Chan Min Lee ),정일용 ( Il Yong Chung ) 조선대학교 공학기술연구원 2009 공학기술논문지 Vol.2 No.4
A purpose of this research was to use the response surface analysis to evaluate the relative importance of factors providing optimum ester-cross linking of cellulose material. In pursuit of these goals, we have treated cotton broad cloth with 1 ,2,3,4-butanetetracarboxylic acid at different pH values. They were used with H3P04, NaH2P02, NaH2P04, Na2HP04, NaH2P02, Na3P04, catalysts to produce nonformaldehyde fabric finishes. Treatments were applied to all materials using a pad-dry-cure process. For the fully understood on the relationship of finish bath pH effect and cellulose esterification, the relative concentrations of chemical species were calculated from ionization constants. In this research, the response surface analysis was used for the correctly mechanical limit values. The statistical parameters tested to correct reactants included amount of reaction and maximum degrees of wrinkle recovery, along with various concentration parameters. There were progressive changes in treated fabric wrinkle recoveries as agents and catalyst of pH levels decreased.