• Journal of Cadastre & Land InformatiX
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• v.45 no.1
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• pp.59-74
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• 2015

This study proposes a land action plan for stabilization of the North Korea in fundamental guarantees of life, social security and social system in order to minimize the social disruption and economic losses by identifying the administrative and operational status of the land in North Korea. Land action plan for North Korea is that the state holds the whole land ownership for a certain period through re-nationalization of the land by not admitting the former owner's ownership and distributes the land to the currently occupying personal and set the land use permission and later land ownership will be introduced and land use permit will be gradually privatized.

• Food Science and Preservation
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• v.20 no.6
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• pp.766-774
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• 2013

The effect of storage temperatures ($0^{\circ}C$and $20^{\circ}C$) and packing functional film for fruit quality were examined in 'Fuyu' persimmon. The fresh weight loss was delay more effectively by the inhibition of transpiration when functional film was used. The firmness was effectively maintained in functional film packages at low temperature ($0^{\circ}C$), which might result from the beneficial combination of $CO_2$ and $O_2$. The soluble solid contents was higher with packing of functional film at $0^{\circ}C$ than at room temperature ($20^{\circ}C$). Highest $CO_2$ production in functional film bags was observed in room temperature storage after one week and thereafter declined sharply whereas lowest in 8 weeks. $CO_2$ concentration regardless of packing slowly increased to $5.2{\mu}L{\sim}10.2mL{\cdot}kg^{-1}{\cdot}h^{-1}$ until 8 weeks of low temperature due to persimmon respiration. Hunter 'b' value changed greatly yellowness according to temperature of storage but there were no significant differences among packaging treatments. Effects of functional film and low temperature in slower softening were consistent. This results suggested that the packing functional film at low temperature resulted in the best retention of quality market.

• The KIPS Transactions:PartD
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• v.13D no.1 s.104
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• pp.61-66
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• 2006

It is reported that the success ratio of software development projects has been only 30%. Many causes lower project's chance of success, particularly lack of systematic project management. Especially, moving on the next phase of project with unsatisfactory outputs can be very problematic because it can cause much waste of resource, time and even lead to the failure of the whole project. Peer review and inspection are some of the practices designed to prevent such waste and possible failure. When defects are identified through such progress, each developer has to work on the product component again and fix the problem. This process is called rework. In this paper, we propose a method for improving quality of reworked product component to prevent excessive cost and time consumed caused by moving on the next phase of a project with a problematic product component. More specifically, this paper suggests a rework indicator that measures the level of rework based on its complexity and severity and is used to choose appropriate checking method on reworked product component. The research also confirmed the method's usefulness and effectiveness by applying the suggested method on four projects.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.37 no.1
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• pp.59-67
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• 1992

The duration of raising seedling of infant rice seedling(IRS) in machine transplanting is 8 to 10 days. This experiment was conducted to investigate the minimum duration of IRS's raising seedling and its method by the combination of several treatments such as plant growth regulator, root-break-seat and temperature. The rice seeds of Hwaseongbyeo was soaked in the solution of metalaxyl for 24 hours at room temperature. Metalaxyl (25% wettable powder), a fungicide, was used in 1, 000 times dilution as a promting substance on the root-mat formation of IRS. The application of fungicide in the nursery soil for the controlling of damping-off and physiologyical seedling rot was omitted due to the metalaxyl seed-soaking treatment. Seeding rate was 220g per seed tray (30$\times$60$\times$3cm). To promote the root-mat formation of IRS, the sheets of polyethylene vinyl and absorptive paper were placed bottom the seed tray. The root-mat formation of IRS was promoted at higher temperature and longer duration of raising seedling. The metalaxyl-treated seeds markedly increased the root length and rooting activity of IRS as compared with the control, thus the root-mat formation was excellent. The absorptive paper with polyethylene vinyl as root-break-seat showed a better root-mat formation compared with control, polyethylene vinyl, alone. The minimum duration of raising seedling of IRS was 5 days after sowing based on the root-mat formation and seedling height under the condition of metalaxyl seed treatment, absorptive paper with polyethylene vinyl as a root-break-seat and the raising seedling temperature 30/2$0^{\circ}C$ (day /night).

• Resources Recycling
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• v.21 no.1
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• pp.49-59
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• 2012

One of the world's top resource-rich countries, the Democratic Republic of the Congo has ample reserves of cobalt, iron ore, copper and diamond in particular. Importing most of major mineral resources, the Republic of Korea has examined-together with the Congo government since 2008-the possibility of a project where it supports port construction in the Democratic Republic of the Congo and acquires useful minerals such as zinc, cobalt and copper in exchange through slag reprocessing in the local city of Lubumbashi. This study conducted feasibility analysis on the slag reprocessing project in Lubumbashi, Congo and found that the project's payback period stands at 6.7 years, net present value(NPV) at 34 million dollars and internal rate of return(IRR) at 17.4%. According to sensitivity analysis that takes into account uncertainties concerning taxation, fixed cost, operational cost and resource prices, the NPV of the project ranges from -24.8 million dollars to 92.7 million dollars.

• Journal of the Korean Geotechnical Society
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• v.26 no.7
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• pp.81-91
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• 2010

In order to investigate the applicability and suitability of the coal ash (bottom ash) to landfill final cover, field pilot-scale lysimeter experiments were carried out. The mixture of loamy soil, bottom ash, and construction waste was placed as a cover material in lysimeter ($2m{\times}6m{\times}1.2m$) which were constructed with cement brick, and then volumetric water contents, pF value, and the quantity of runoff and seepage of treatment boxes filled with the mixture of loamy soil and the industrial by-products were monitored from July, 2007 to february, 2008. Among the cases tested, consequently, the case containing the mixture of bottom ash and loamy soil was most effective in plant growth and water retention ability.

• Proceedings of the Korea Multimedia Society Conference
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• 2002.05d
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• pp.844-848
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• 2002

Araki[5]등은 Mambo[1]의 대리 서명 방식을 확장하여 대리 서명자의 부재시 또 다른 대리 서명자가 원 서명자를 대신해서 서명을 생성할 수 있는 다단계(multi-level) 대리 서명 방식을 제안하였다. 그러나 그들이 제안한 방식은 검증자가 전송받은 서명이 타당한 서명자들로부터 생성된 것인지 확신할 수 없는 문제점과 다단계 환경(예를 들어 위임 서명 유효기간 재설정)에 적합한 위임 서명 키 생성이 어렵다는 문제점이 있다. 따라서 본 논문에서는 전자적 처리 환경에 좀더 안전하고 융통성있는 응용을 위해 보증 위임 대리 서명 방식과 proxy-signcryption 방식을 확장한 다단계 대리 서명 방식을 제안하고자 한다.

• Nuclear industry
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• no.7_8 s.8
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• pp.39-44
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• 1982

경제협력개발기구${\cdot}$원자력기관 (OECD${\cdot}$NEA)은 5월 14일 $\lceil$원자력 발전과 연료사이클-2025년까지의 전망$\rfloor$이란 제목의 보고서(Yellow Book)를 발표했다. 이 보고서는 세계 각 지역의 우라늄, 토륨, 중수, 농축, 연료가공, 사용후 핵연료저장, 재처리등의 핵연료사이클 서비스의 수급전망으로 단기(현재$\~$1990년), 중기(1990$\~$2000년), 장기(2000\~2025년)의 3기간으로 나누어서 분석하고 있어 원자력 장기계획을 검토할 때 대단히 유익한 자료가 되고 있다.

• Proceedings of the Korean Institute of Resources Recycling Conference
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• 2002.05a
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• pp.27-36
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• 2002

1995년 이후부터 현재까지 전기로 제강더스트의 재활용 또는 처리에 대하여 국내 및 전 세계의 공개특허 및 연구논문을 분석하여 전기로 더스트의 재활용연구 동향을 파악하고자 하였다. 국내의 경우, 35건의 특허가 공개 또는 등록되었는데, 활용방법에 따라 분류하면 다음과 같다. 고형안정화처리가 6건, 케미칼 제조 7건, 아스콘 채움재가 4건, 토건재료로 활용이 3건, 습식처리 회수가 4건, 용융환원 3건, 폐수처리활용이 2건, 시멘트원료 1건, 건식회수법 5건으로 나눌 수 있다. 또한 년도별로는 95년 2건, 96년 1건, 97년 4건, 98년 4건, 99년 5건, 2000년 18건, 2001년 1건이 출원되었다. 2000년에 전체 출원 건수의 절반이 집중되었다. 미국특허는 이 기간중 39건이 등록된 것으로 검색되었다. 년도별로는 95년 3건, 96년 6건, 97년 5건, 98년 7건, 99년 9건, 00년 2건, 01년 3건, 2002년 4건(2개는 한국출원)이 검색되었다. 처리방법 별로는 마찰재 원료로 활용 3건, 고화처리 3건, 건식장치 1건, 습식처리 13건, 유동환원, 직접환원, 환원배소, 플라즈마환원등의 건식 처리법이 10건, 습식+건식콘크리트 4건, 폐수처리 활용 1건, 건자채 생산 1건등이 등록되었다. 국가전자도서관에서 EAF Dust를 키워드로 1993년 이후의 EAF Dust 관련 연구문헌을 검색한 결과 48건이 검색되었고, 01년에 5건, 00년에 3건, 99년에 4건, 98년 2건, 97년이 가장 활발하여 15건의 보고가 확인되었다. 96년에는 8건, 95년에는 3건의 보고가 검색되었다. 01년의 연구논문들은 direct recycling, reduction kinetics, distillation reduction등에 관심을 보이고 있었다. 가장 활발하게 많은 연구논문이 발표되었던 97년 이후에는 논문 발표수가 현저히 감소되어 97년 이후에 이 분야에 대한 관심이 감소하고 있음을 보여주고 있다.

• Journal of Life Science
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• v.18 no.8
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• pp.1096-1105
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• 2008

This study was carried out to identify the optimum condition for priming, as a series of experiments for the enhancement of germination percentage and germination synchronization in cool-season turfgrass seeds. The optimum priming conditions to maximize the germinability in both Kentucky bluegrass and Tall fescue was a 1 day treatment of 100 mM $K_3PO_4$ at $25^{\circ}C$. The seeds treated with the optimum priming condition enhanced the germinability compared to control, and shortened the time for germination with reduced $T_{50}$ and mean daily germination (MDG). However, as the concentration and treatment period of NaOH or KOH increased, significantly decrease in germination percentage was observed. Germination percentage in Creeping bentgrass and Bentgrass was below 10%, regardless of priming treatment. However, the priming treatment with 200 mM $KNO_3$ for three days improved the germination up to 6%, which was not a statistically significant level. The most effective priming period for Kentucky bluegrass and Tall fescue was one day treatment, but the germinability was suppressed as the treatment period was extended until six days. For priming chemical treatment, germinability was improved with the concentration of 100 mM, while it was reduced at higher concentrations of 200 mM and 300 mM.