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서영삼 전남대학교 사회과학연구소 1998 현대사회과학연구 Vol.9 No.1
Three experiments were conducted to examine the link imagery effect on the recall performance of a serial word-list. Experiment 1 investigated the effects of instruction type(rehearsal, separate imagery, and link imagery) on memory. The result indicated that the condition of link-imagery instruction showed better recall than that of separate imagery and rehearsal. But it was obscure whether subjects correctly performed according to condition given by instruction on them In experiment 2, subjects directly wrote on paper about being generated imagery. The result showed that the condition of link-imagery instruction produced higher recall than that of separate imagery. In experiment 3, when the imagery type(common or bizarre) was manipulated in both a within-list design and a between-list design, there was no difference in recall between the condition of common and bizarre imagery. The results of these experiments suggest that the use of the link mnemonic improve recall. but the type of imagery in linking items has no effect on recall.
N-이소프로필아크릴아미드 공중합 섬유재료의 합성과 특성
서영삼,윤기종 한국섬유공학회 2004 한국섬유공학회지 Vol.41 No.1
N-isopropylacrylamide (NIPAAm) copolymers were prepared to explore the possibilities of forming responsive fibers. Acrylic acid (AA), methacrylic acid (MAA), acrylamide (AAm), acrylonitrile (AN), methyl methacrylate (MMA), and vinyl acetate (VAc) were copolymerized with NIPAAm and the products were characterized by GPC; ¹H-NMR, IR, DSC, and TGA. Extrudates were prepared to evaluate the possibilities of utilization of the copolymers in fiber applications. The copolymerization of NIPAAm with the various comonomers at a molar feed ratio of 1 : 1 were carried out using AIBN as initiator in N,N'-dimethylformamide at a total monomer concentration of 20% (wt.). The monomer composition of the prepared copolymers evaluated by elemental analysis suggested that approximately 1 : 1 copolymers were formed in the case of poly(NIPAAm-co-AA), poly(NIPAAm-co-AAm), and poly(NIPAAm-co-MAA). The glass transition temperatures of the copolymers determined by DSC analysis were in the range, 110∼170 ℃. In the case of the copolymers having carboxylic acid groups, endothermic peaks in the range of 160∼200 ℃ appeared in the DSC thermograms, which appear to be due to anhydride formation via dehydration. Above this temperature the copolymers were stable up to 340 ℃. In the case of poly(NIPAAm-co-AA), poly(NIPAAm-co-AN), poly(NIPAAm-co-MAA), and poly(NIPAAm-co-MMA), extrudates could be prepared by injecting concentrated solutions of the copolymers into a nonsolvent coagulating bath. Among these, poly(NIPAAm-co-MAA) and poly(NIPAAm-co-AN) appear to be most promising in the preparation of PNIPAAm copolymer fibers.
N-isopropylacrylamide의 그라프트에 의한 아크릴 섬유의 표면개질
우종형,서영삼,윤기종,Woo, Jong-Hyung,Seo, Young-Sam,Yoon, Kee-Jong 한국섬유공학회 2006 한국섬유공학회지 Vol.43 No.3
Acrylic fibers were graft-copolymerized with N-isopropylacrylamide in aqueous media, using a radical initiator, benzoyl peroxide. The grafting reactions were carried out within the $75{\sim}85^{\circ}C$ temperature range, and the effects of initiator, monomer concentration, and the amount of fiber on the graft yield were also investigated. The maximum graft yield of 88.6% was reached when grafting was carried out at the benzoyl peroxide concentration of $2{\times}10^{-3}mol/l$, the N-isopropylacrylamide concentration of 0.5 mol/l, for 8 hours at $80^{\circ}C$. The grafted fibers were characterized by nuclear magnetic resonance spectroscopy, infrared spectroscopy, scanning electron microscopy, and thermogravimetry. Scanning electron micrographs showed that homogeneous fiber surface changed to shell-like heterogeneous appearance with increase in degree of grafting. Fiber diameter also increased with graft yield. Moreover, moisture regain and water absorptivity of the grafted fiber were highly enhanced by grafting. The results on the response of grafted acrylic fibers to pH and heat are presented.
폴리부틸렌 나프탈레이트를 하드 세그먼트로 하는 폴리(에테르-에스터) 공중합체의 합성
윤기종,서영삼,Yoon, Kee Jong,Seo, Young Sam 한국섬유공학회 2013 한국섬유공학회지 Vol.50 No.1
Melting temperature of the poly(ether-ester) copolymers are generally around $200^{\circ}C$ and are suitable for moisture barrier in active sportswear, but higher melting temperatures are required for them to be used in personal protective clothing. In an attempt to obtain higher melting poly(ether-ester) copolymers, copolymerization of bishydroxybutyl naphthalate and poly(ethylene glycol)-b-poly(propylene glycol)-b-poly(ethylene glycol) tri-block copolymers (EPE) was carried out to obtain poly(butylene 2,6-naphthalate)/EPE copolymers with poly(butylene 2,6-naphthalate) (PBN) as hard segments and EPE as soft segments. PBN/EPE copolymers containing different amounts of EPE (0, 5, 10, 20 and 30 wt%) of different molecular weights (1100, 2000, 2800 and 5800) were prepared. Composition analysis, solution viscosity and density measurements were made. The composition of copolymers determined from $^1H$-NMR spectra were similar to feed composition.
스키 매니아의 운동욕구가 목표성향과 여가만족에 미치는 영향
김찬회,서영삼 한국체육정책학회 2015 한국체육정책학회지 Vol.13 No.1
To figure out ski maniacs' exercise desires on goal tendencies and satisfaction in leisure, this study has chosen a population as who use (Y, P, H) resorts in Gangwondo from December 20 to 30, 2014; 273 questionnaires were statistically treated through SPSS 18.0 program, and the conclusion deducted from analysis comes as follows. Firstly, seeing the influences of exercise desires on goal tendencies, assignment tendency of goal tendency have been figured out to be influenced by pleasure of exercise desires (β=.290, p<.05) and stress (β=.217, p<.05) factors; while self tendency of goal tendency was influenced by human relationship (β=.423, p<.001) factor. Secondly, seeing the influence of goal tendencies on satisfaction in leisure secondly, self satisfaction of leisure satisfaction has been figured out to be influenced by assignment tendency of goal tendency (β=.453, p<.001) and self tendency (β=.162, p<.05); while health of exercise desire was influenced by assignment tendency and (β=.422, p<.001) self tendency (β=.297, p<.001) factors of goal tendency. Information · exchange of exercise desire has been figured out to be influenced by assignment tendency (β=.353, p<.001) and self tendency (β=.270, p<.001) factors of goal tendency. Thirdly, seeing the influence of exercise desire on leisure satisfaction, exercise function (β=.304, p<.001), pleasure (β=.341, p<.001) and stress (β=.145, p<.05) of exercise desire has been figured out to positively influence on self satisfaction of leisure satisfaction, and negatively influence on human relationship (β=-.205, p<.05). On health of leisure satisfaction, exercise function (β=.516, p<.001) and stress (β=.145, p<.05) factors of exercise desire have been figured out to influence; on information · exchange of leisure satisfaction, exercise function (β=.335, p<.001), human relation (β=.417, p<.001) and stress (β=.127, p<.05) factors of exercise desire influence.