• 감성과학
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• 제18권2호
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• pp.65-74
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• 2015

본 연구에서는 현대 사회의 주요 흐름인 '발전과 진화'의 방향성에서 한발 물러나, '지우는' 경험과 그 감성에 대한 연구 가능성을 탐색하고자 하였다. 이를 위해, 지금까지 많은 주목을 받지 못한 키워드인 지우는 경험에 대한 통합적 문헌조사를 우선적으로 수행하였으며, 이를 토대로 실제 사용자들을 대상으로 하는 맥락 질문법을 진행하였다. 맥락 질문법의 경우, 아날로그적인 연필-지우개 사용맥락, 디지털의 대표적인 맥락인 컴퓨터-키보드 사용맥락, 마지막으로 최근 활발한 활용을 보이는 Tablet PC 사용맥락에 따른 사용자들을 모집한 후, 각각의 사용맥락에 대한 In-depth한 정성적 인터뷰 및 정량적 자료 수집을 진행하였다. 결과적으로, 지우는 맥락에서는 특정 내용을 잘 지워내는 상황적 효용뿐만 아니라 이를 수행하는 사용자에게도 정서적으로 만족스러운 경험을 제공해야함을 확인할 수 있었다. 해당 연구에서 진행된 탐험적 시도 및 실증적 결과들은 향후 연구들에 대한 학술적 접근과 함께 실용적 관점에서의 디자인 함의를 제공할 수 있을 것으로 기대된다.

• 한국수산과학회지
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• 제36권4호
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• pp.340-345
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• 2003

In order to choose the manufacturing method for extracting alginates from sea tangle, Laminaria japonica, three methods were applied. In Method I, alginates were extracted with NaOH solution from sea tangle powder and extracted alginates were precipitated and converted to alginic acid by $CaCl_2$ and HCI solution. Then alginic acid was converted to sodium alginates with $Na_2CO_3$ solution. Sodium alginates were precipitated with methyl alcohol and were resolved with hot water and this step was repeated three times. Method II was same to Method I except final step including that sodium alginates were precipitated and washed with methyl alcohol three times. Method III included that sodium alginates were extracted with $Na_2CO_3$ solution from sea tangle powder then sodium alginates were precipitated and washed with methyl alcohol three time. Extracting time increased with Increasing extracted alginates amounts but increasing rates were below $0.4\%/h.$ Alginates amounts recovered by Method III showed above 2 times more to those by Method I and II. Extracting time increased with increasing ash amount of sodium alginates but increasing rates were below $0.1\%/h.$ and that of sodium alginates extracted by Method III showed higher value $(5\%)$ than those by Method I and II. In the sodium alginates prepared by Method III, the amount of ash in alginates dried by air was $34.4\%,$ that by vacuum freeze drying was $47.8\%.$ Extracting time increased with decreasing average molecular weight (MW) and degree of polymerization (DP) of sodium alginates, MW and DP of alginates prepared by Method III were higher than those by Method I and II In same extracting time. Extracting time increased with decreasing rate of apparent viscosity change (SAV) of alginates solution, and SAV of alginates prepared by Method III showed higher value than those by Method I and II in same extracting time. SAV of alginates dried by air was higher than that by vacuum freeze drying. Relating equation among SAV MW and DP were MW = 60.066 (SAV) -93.950, DP =309.760 (SAV) -485.084 and MW = 0.914 (DP)+0.213.