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Study of ${\beta}$-glucuronidase from Human Seminal Plasma: Purification and Properties
이남식,양철학,이희영,Lee, Nam-Sik,Yang, Chul-Hak,Lee, Hee-Yong The Korean Society for Reproductive Medicine 1982 Clinical and Experimental Reproductive Medicine Vol.9 No.1
암모니움 썰페이트 분획분리법. 초미량여과. DEAE - 셀루로오즈 및 젤 여과 크로마토그라피법 등을 사용하여 사람의 정액에서 베타 글룩유로니다아제를 분리하였다. 이 효소는 pH4.4와 온도 50${\sim}$$54^{\circ}C$에서 최고의 활동도를 나타내었다. 파라-나이트로페닐-디-글룩유로나이드를 기질로 사용하였을때 Km치는 0.59mM이었다. 또한 이 효소는 수은이온, 구리이온, 은이온에 의해 활동도가 방해되고 반면에 망간이온 및 코발트 이온에 의해서 효소의 활동도가 증가되었다. 세파댁스 G-200 젤여과법에 의해 측정된 사람의 정액 베타글룩유로니다아제의 분자량은 400,000 이었다. 이렇게 정제된 효소는 수정과정 중에서 카페시태시션의 연구에 도움을 주리라고 본다.
이남식,김호성,신찬수,Lee, Nam-Sik,Kim, Ho-Seong,Sin, Chan-Su 대한인간공학회 1998 大韓人間工學會誌 Vol.17 No.3
The purpose of this paper is to evaluate the input methods of the numeric keypads that are widely used in various types of consumer and industrial electronic products. Three methods to enter numerals using keypads were compared: (1) Machine Intelligence, (2) + 100 key, and (3) Enter key input methods. Experiments were conducted to compare these three input methods for the channel selection of TV. Experimental prototypes which simulate TV user interfaces were developed using $RAPID^{TM}$ for usability testings. In the experiment, data on subject performance such as completion time, operational errors, and user interaction were collected through auto-logging method and video recording. After each test session, subjective preference was also asked using a questionnaire. In order to analyze the type of operation errors and the error causation, operation sequences were analyzed from the collected data. The Enter key input method showed better performance than other input methods. Based on these results. we can conclude that the input method using numeric keypads should be compatible with generic number counting(to input ch 7, it would be better to input 7 directly than to input 07 or 007) and should switch the channel as quickly as possible. This conclusion can be applied to the design of user interfaces which require numeral inputs.
1960년$\sim$2007년 수도권 아파트단지의 공동생활공간 변화 과정
이남식,서귀숙,Lee, Nam-Sik,Suh, Kuee-Sook 한국주거학회 2008 한국주거학회 논문집 Vol.19 No.3
The purpose of this study is systematically to examine the changes that have taken place to the community spaces of apartment complexes in the national capital region of Korea. The methodology used in this study entails analyzing existing research and case studies carried out on this subject matter. Prior to these case studies, an existing study had been made of the chronological changes in policy, related laws and regulations in Korea since the 1960s. This case study presents the component ratio and systematized present situation of community spaces in twenty-two apartment complexes. An analysis of the researching process has revealed the following important factors related to the changes that have occurred in community spaces in apartment complexes. (1) Apartment complexes were originally developed in the 1960s to ease the housing shortage. Because the priority was to solve the housing shortage, community spaces were not widely considered or developed. (2) The standard of community spaces was established as mandatory by law in the 1970s, resulting in the emergence of various facilities that provided community spaces. (3) In the 1980s, various design competitions for apartment complexes were conducted as an attempt to improve residential environments. This process resulted in the development of new characteristic of subsidiary facilities. (4) During the period when housing problems were being addressed in the 1990s, the Community Service Center was added to the welfare facilities for residents. (5) Recently, during the 2000s, an improvement in residential environments has evolved due to the expansion of housing supply and economic growth. The quality of community spaces has therefore improved from the 1960s onward. This study revealed that policy and related laws regarding community space in Korea have been developing in a suitable direction and that the addition of various facilities to community spaces has improved the quality of living environments.
발달장애 청소년 자녀를 둔 어머니의 양육 경험에 관한 연구
이남식 ( Lee Nam Sik ),임해영 ( Lim Hae Young ),백승희 ( Back Seunghee ) 한국가족사회복지학회 2021 한국가족복지학 Vol.68 No.1
This study examines the parenting experience of mothers of adolescents with developmental disabilities (DD) drawing practical implications for supporting the mothers and the children. A total of ten research participants with children with DD were interviewed. The findings can be categorized into 13 conditions: ‘hasty acceptance of reality’, ‘ignorance about children with developmental disabilities’, ‘parenting stress’, ‘dark and bitter body’, ‘growing pain of mothers parenting a child trapped in an adult’s body’, ‘social exclusion’, ‘facing limits’, ‘support system’, ‘finding personal growth’, ‘utilization of social resources’, ‘searching for alternatives’, ‘anxiety about the future’, and ‘tasks to be achieved’. The mothers’ parenting experience can be summarized into four phases: ‘hasty acceptance of reality’, ‘parenting as an outsider’, ‘searching for alternatives’, and ‘anticipatory anxiety’. Based on these findings several implications were developed and proposed for welfare of the children with disorder and their family.