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건설폐기물의 처리공정에서 생산된 선별토사의 활용 방안 제시
나철성,강한서,박정호,Na, Chul-Sung,Kang, Han-Su,Park, Jung-Ho 한국건설순환자원학회 2009 한국건설순환자원학회지 Vol.4 No.4
선별토사와 관행농토를 혼합하여 물리역학시험을 실시한 결과 일반 성 복토재로써 물리적 성능이 일반토양과 유사하여 활용이 가능할 것으로 판단된다. 토양분석시험 결과 산도가 강알칼리성을 보였고 유효인산 성분이 다소 부족하였으며, 치환성 양이온 중 Ca의 성분의 과잉으로 인하여 생육 저하 현상이 발생할 가능성이 있는 것으로 사료된다. 또한 상층토 50cm를 걷어내고 하층토 부분을 선별토사로 치환 후 걷어낸 상층토를 관행농토로 복토하여 생육 분석한 결과, 생육 장해 요인이 거의 없는 것으로 판단된다. 따라서 선별토사를 활용하는데 있어서 선별토사를 근권의 영향권인 유효토심에 사용하는 경우에는 작물의 생육을 저해할 가능성도 있기 때문에 객토와 같은 유효토심에 직접적으로 사용하기 보다는 근권에 대한 영향이 상대적으로 적은 하층토에 대해 대체하는 방안이 유효할 것으로 사료된다. 또한 선별토사를 세척하는 기술이나 산도의 중화, 유기물 공급 등의 방법을 강구해야 하며, 선별토사의 재료원이 일정치 않은 특성상 품질이 균질하지 않기 때문에 품질확보를 위해서는 품질에 따라 1급, 2급, 3급 등으로 나누고 사용용도 기준을 각각 정하여 품질의 확보를 위한 인증제도의 도입이 필요할 것으로 사료된다. In order to verify relevance propriety as material for improving and replacing agricultural land of soil(the rest is sorting soil) produced in treatment process of construction waste, this study executed physical, mechanics and soil analysis test with mixing sorting soil and farm land, crops rearing comparison test with replacing lower layer soil.
피부두겹집기법과 생체전기 임피던스법을 이용한 청소년의 체구성 요인 분석
김명기(Myung Ki Kim),황문현(Moon Hyun Hwang),변용현(Young Hyun Byun),김상호(Sang Ho Kim),심영제(Young Jae Shim),김재등(Jae Deung Kim),강한서(Han Suh Kang) 한국사회체육학회 2001 한국사회체육학회지 Vol.16 No.-
The purpose of this study is: (1) to testify the significant differences of body composition factors depending on sex and age; and (2) to investigate the correlation, if any, of the two different methods used for the research. The two methods are STM(the skinfold thickness method) and BIA(the bioelectrical impedance analysis), the most popular techniques currently used in the field. The representative sample group consists of 172 middle school students and 210 high school students, who live in Seoul and whose age distribution covers from thirteen to eighteen. The research based its comparison and analysis on the basic physical constitution factors, percent body fat, body fat mass, and fat free mass, and yielded the following results: First, the height and weight of the sample group increased in proportion to their ages, regardless of sex. Second, in case of the body fat mass, the average rate of the female sample group was higher than that of the male ones, and increased moderately in proportion to age. Both of the methods produced the significant differences depending on age and sex(p<.05). Third, the female sample group contained more body fat mass than the male counterpart, and the body fat mass increased in proportion to age. Both of the methods produced the significant differences depending on age and sex(p<.05). Fourth, the male sample group contained more fat free mass than the female counterpart. The fat free mass increased in proportion to age, and that conspicuously in case of the male sample group. Both of the methods produced the significant differences depending on age and sex(p <.05). Fifth, the outcome of the percent body fat, body fat mass, and fat free mass, resulted from STM and BIA proved distinct correlation between the two methods(r=.86,.90,.95). In sum, adolescence is the most prominent period in terms of the physical maturation and hormone secretion. The period experiences the remarkable shift in the physical constitution and articulates distinct differences of the body composition factors. Accordingly, the period deserves critical attention and requires systematic analysis and evaluation. The two methods have legitimated their usage as reliable techniques, with the visible presence of a substantial body of work engaged with the techniques. My study is designed to be part of the attempt to articulate their credibility as a set of techniques in analyzing and evaluating the body composition factors.