• Weed & Turfgrass Science
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• 제4권2호
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• pp.111-117
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• 2015

The equilibrium moisture contents (EMC) in seeds of four Echinochloa (E. crus-galli var. crus-galli, E. crus-galli var, echinata, E. crus-galli var. praticola, E. esculenta) were measured at $20^{\circ}C$ with equilibration over a series of lithium chloride solutions with relative humidities ranging from 0.11 to 0.8 to determine sorption isotherms and safe storage relative humidity. Standard seed sorption isotherm models i.e. modified Henderson, modified Chung-Pfost, modified Halsey, modified Oswin and Guggenheim-Anderson-deBoer (GAB) equations were adopted to evaluate the goodness of fit to sorption isotherms. This study indicated that EMC of seeds was significantly different in four Echinochloa species at various relative humidity. The modified Oswin equations for E. crus-galli var. crou-galli, E. crus-galli var, echinata, E. esculenta and GAB equation for E. crus-galli var. praticola were adequate models for the EMC data. Seeds of four Echinochloa species have monolayer moisture contents when stored at RH < 0.1. These results show that seed moisture isotherm model should be selected according to genetic variation.

• 한국사회복지학
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• 제46권
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• pp.60-88
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• 2001

This paper examined the impacts of the welfare reform program, California Work Pays Demonstration Program(CWPDP), implemented in 1992. CWPDP was designed to move welfare recipients into the labor market by reducing the amount of AFDC grants and one-third earned income disregard. The evaluation of the policy impacts on the welfare recipients was conducted in two areas: employment and earnings. This study used a subset of a database created by the California Department of Social Services, and University of California Data Archive and Technical Assistance. The subset is composed of 3,936 AFDC-FG cases selected in LA County: 1,311 control cases and 2,625 experimental cases. The control group was kept on the AFDC rules as of September 1992, while the experimental group was subject to AFDC rule changes implemented under CWPDP. The analyses of the employment and earnings using the random effects probit model and the random effects regression model, respectively, indicated that CWPDP did not effectively encourage female heads to participate in the labor market. It also revealed that CWPDP did not significantly increase the earnings of female heads. The findings imply that the disincentive structure of the public assistance program is not the main barrier preventing female heads from getting jobs and leaving the welfare rolls. Rather, participation in the labor market and exit from welfare is mainly determined by their own demographic characteristics and the economic cycle. Based on the findings, policy implications are suggested on the National Minimum Protection Program in Korea. Those include a flexible exemption rate for the earned income of beneficiaries, affordable child care services, and guaranteed public jobs.

• 한국인쇄학회지
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• 제30권1호
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• pp.35-45
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• 2012

Polyacrylate dispersion(emulsion) as adhesive material was superior in quality such as preservation characteristics and reversibility. The tapes for repairing archival documents manufactured with four different types of formulation resulted in pH 7~8.8, soluble solid 50~52%, and viscosity 1,300~2,500 cps. Sample 4 of those was most excellent. Probably, sample 4 included inorganic materials such as MgO, silica gel, and zeolite. For selecting carrier of tape, tracing papers, were applied for manufacturing tapes and tested for adhesive strength and peel strength. Adhesive strength of tracing papers, was 3.1~3.8(N/10mm), 2.2~2.8(N/10mm), and 1.7-2.3(N/10mm), respectively. Peel strength was similar in all samples. To determine characteristic of conservation to the selected carriers, stability of deterioration was examined at conditions of $105^{\circ}C$ and $80^{\circ}C$ 65% for 7 days.

• 한국잡초학회지
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• 제18권2호
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• pp.85-94
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• 1998

Herbicides play a very important role in modern agriculture. However, the herbicide applied to the agricultural field may accumulate in the field, converting the advantages to environment pollution. Many small animals in the ecosystem such as alderfly, earthworm, butterfly, loach, frog, firefly, some birds and aquatic organisms have been known to disappear gradually. In addition, several behavior of herbicides including adsorption by soil, movement by water, photodecomposition, volatilization to air, absorption by plant, metabolism by soil microorganisms and so on, are proceeded while the herbicide remained in the environment. In this review, fate and behavior of herbicides in the environment and their effect on ecosystem after their application are focused on four aspects : the first is the absorption and metabolism of herbicides by plant; the second is the residues of herbicides in soil and water environments: the third is the accumulation and release of herbicides in aquatic organisms and the fourth is the translocation of herbicides in model agricultural ecosystem. Many factors may affect the behavior and fate of herbicides after their application, climatic conditions and soil properties seem to be the most important. Therefore, the fate and behavior of herbicide in Taiwan, located on subtropical region, may differ from those in Korea.

• 한국게임학회 논문지
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• 제15권6호
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• pp.77-88
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• 2015

이 논문에서는 비디오 게임의 역사를 보존 연구하기 위한 아카이브들의 국내 사례와 해외 사례를 비교 조사하고, 이를 통해 게임 역사박물관 구축을 위한 기초적인 자료 분류와 구축 방식을 제안하고자 한다. 게임의 역사를 수집, 보존하는 것은 일차적으로는 게임학 연구를 위한 기초자료를 구축하고자 위함이지만, 이러한 운동이 꼭 연구만을 위한 목적으로 귀결되는 것은 아니다. 따라서 본 논문에서는 디지털 게임을 수집, 보존, 분류, 전시, 열람하는 일련의 과정을 미디어 고고학(media archeology)이라는 새로운 학문 분야에 바탕하여 접근하고자 한다.

• 천문학회보
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• 제39권2호
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• pp.61.1-61.1
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• 2014

IC 10 is one of the most well-known irregular starburst dwarf galaxies in the Local Group. Its low metal and oxygen abundance together with proximity make it an excellent laboratory to test star formation models, especially in low-metallicity systems like galaxies in the early Universe as well as many other local dwarfs. Among a number of active star forming regions, we have detected H2O kilo-maser emission in the south-east region of IC 10(IC 10 SE) using the Korean VLBI Network(KVN). This maser line is likely to be associated with a giant molecular cloud identified in IC 10 SE by former CO studies. Using the HI and CO data from the VLA and SMA archive, we probe the atomic and molecular gas properties of IC 10 SE. We discuss how the cool gas morphology and kinematics are related with maser and star formation activity in IC 10 SE.

• 한국기록관리학회지
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• 제21권4호
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• pp.45-63
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• 2021

전자기록 환경을 맞아 기록이 지닌 정보로서의 활용 필요성을 제기하는 논의들이 제기되고 있으며, 이에 ISO 15489:2016에서는 기록을 정보자산 중 하나로 규정하였다. 이러한 정보자산 개념을 수용해 각국 국립기록청에서는 관련 정책 및 지침을 수립해 정보자산 관리를 적극적으로 추진하고 있다. 이에 본고에서는 각국 국립기록청에서 추진 중인 정보자산 관리 정책 및 지침을 분석하고자 한다. 이는 디지털 환경을 맞아 기록의 정보자산화를 위한 세계적 동향을 파악함과 더불어, 향후 우리나라의 제도적 방안 모색을 위한 벤치마킹 요소를 도출하기 위해서이다. 이를 위해 우선 기록관리 분야에서의 정보자산에 대한 개념적 기원을 조사하기 위해 기록관리 국제표준에서의 기록에 대한 정의 및 관련 연구성과들을 분석하였다. 이어 정보자산 관리에 대한 정책 및 지침을 수립해 운영 중인 영국, 뉴질랜드, 호주 국립기록청의 실제 사례들을 조사하였으며, 이를 통해 우리나라의 제도적 방안 모색을 위한 일환으로 해외 사례의 시사점과 함께, 기록과 정보자산의 관계 정립을 위해 보완해야 할 사안들을 제시하였다.

• 한국잡초학회지
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• 제31권2호
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• pp.212-219
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• 2011

플루폭삼(flupoxam) 과립수화제는 새포아풀, 바랭이 등의 일년생 화본과 및 광엽잡초에 대해 95%이상의 방제효과를 나타냈다. 약효는 $2kg\;ha^{-1}$에서 3~4월 처리의 경우 120일 이상, 9~10월에 처리할 경우 180일 이상 지속된다. 또한 토양흡착성이 높기 때문에 안전한 처리층이 형성되고 예초후 잔디 찌꺼기(thatch) 유무에 관계없이 잡초방제 효과가 100%이었다. 기존의 잔디용 제초제(디니트로아니린계, 피리딘계, 카바메이트계) 등과는 다른 새로운 작용기작을 가지고 있어 약제의 교호살포에 효과적이다. 주변 조경수에는 일부를 제외하고는 이상증상이 없었다.

• 한국기록관리학회지
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• 제14권4호
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• pp.153-175
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• 2014

이 글은 2007년부터 도입된 기록관리기준표 체계에서의 국내 기록물 평가제도와 실무의 현황과 문제점을 진단하고 개선방안을 모색하고 있다. 평가주체, 평가시점, 평가기준이라는 평가의 세 가지 요소를 중심으로 분석했다. 기록물법령과 제도에 나타난 평가 관련 규정에 모순된 부분이 많았다. 특히 평가기준은 기록물을 대상으로 하는 것과 기록물을 생산하는 업무를 대상으로 하는 두 가지 기준이 혼재되어 있었다. 평가정책을 마련하는 일이 시급했다. 이러한 현황을 토대로 기록관 및 영구기록물관리기관 소속 기록관리 전문직의 역할을 확대하고 지금과 다른 형태로 민간전문가가 평가에 참여하는 방향으로 개선방안을 제시했으며 일부 평가 실무프로세스의 변화도 제안했다.

• Weed & Turfgrass Science
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• 제5권4호
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• pp.181-186
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• 2016

Three Echinochloa species inhabit various crop fields with different soil moisture conditions. Therefore, a growthpouch test was conducted to investigate adaptive diversity of six Echinochloa species, three from Korea and three from USA, toosmotic stress by assessing shoot and root growths. Echinochloa crus-galli var. praticola showed the greatest tolerance to osmoticstress in both root ($GR_{50}=1316.3g\;PEG\;L^{-1}$) and shoot ($GR_{50}=212.2g\;PEG\;L^{-1}$) growths, while Korean E. oryzicola was mostsensitive to osmotic stress in both root ($GR_{50}=116g\;PEG\;L^{-1}$) and shoot ($GR_{50}=126.2g\;PEG\;L^{-1}$) growths. Root to shoot (R/S) ratioof Echinochloa crus-galli var. praticola increased with increasing osmotic stress, while that of Korean E. oryzicola decreased, suggestingthat R/S ratio is closely related to osmotic stress tolerance in Echinochloa species. Our results clearly demonstrate that E. crus-galli var.praticola maintains high R/S ratio even under high osmotic stress, which enables this species to well adapt to dry upland condition. Incontrast, while E. oryzicola fails to maintain sufficiently high R/S ratio, resulting in poor adaptability to dry upland condition.