• The Korean Journal of Mycology
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• v.47 no.2
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• pp.143-152
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• 2019

A new cultivar 'Sanjanghyang' was bred from monokaryotic strains of 'Sanbaekhyang' and 'Jangan 1ho'. Pileus was flat, round, and reddish brown. The diameters of the pilei and stipe length of the fruiting bodies were 67.1 mm and 16.9 mm, respectively. The scales were white or slightly brown and distributed evenly. The gill density was sparse and showed a rippled texture. The stipe was cream in color and the fluff was medium. 'Sanjanghyang' had a short cultivation period and fruiting bodies occurred sporadically. Temperature for fruiting body formation was a medium, between 15 to $19^{\circ}C$. 'Sanjanghyang' was different from 'Sanbaekhyang' with regard to its pileus diameter (67.1 mm) and autumn and spring fruiting body production period. 'Sanbaekhyang' had pileus diameter of 74.7 mm, and fruiting body formation occurred in spring and autumn. The rate of fruiting body formation was 89% (first flush), 4% (second flush), and 7% (third flush).

• Environmental and Resource Economics Review
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• v.17 no.3
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• pp.1-29
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• 2008

The goal of this study is to analyze the effects of the second energy tax reform of the transportation sector in Korea. For this purpose, we estimated the elasticities of energy demand(for gasoline, diesel and LPG) by using the ARDL(Auto-Regressive Distributed Lag) Model during the period of 1997 and 2005. We have the empirical results that the demand for diesel would decrease as much as of 382 million barrel per year and the demand for LPG would increase as much as of 20 million barrel per year since 2007. The second energy tax reform would also result in the decrease of 27,346 ton of air pollutants and 0.96 million ton of carbon dioxide per year. This shows that the second energy tax reform would have achieved its own policy goals by reducing energy demand and improving the quality of environment.

• Proceedings of the Korean Institute of Resources Recycling Conference
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• 1993.03a
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• pp.8-8
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• 1993

• Magazine of RCR
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• v.9 no.3
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• pp.31-37
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• 2014

• Digital Contents
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• no.7 s.74
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• pp.52-55
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• 1999

인터넷상에 존재하는 네트워크 자원이 급증하면서 이들 자원을 식별. 기술하는 메타데이터도 여러 가지 다른 형식으로 개발 및 이용되고 있다. 따라서 독립적으로 운용되는 메타데이터간의 상호호환성을 높이기 위한 메타데이터 연결이나 통합 구조가 요구된다. 이러한 통합 구조의 논의는 DC의 제2차 워크숍에서 제안돼 WF(Warwick Framework)에서 시작되어 RDF(Resource Description Framework)로 이어지고 있다.

• Journal of the Korean Recycled Construction Resources Institute
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• v.4 no.1
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• pp.1-9
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• 2016

While the amount of construction waste has not been changed much in discharge for last 10 years, the recycled resources refined from construction waste have been mainly applied to low-leveled one such as reclamation, back-fill, road base or subbase and so on. Thus this study addresses the applicability of recycled fine aggregate as a replaceable material in precast concrete. To evaluate the possibility, both of dry and wet processes were adopted as well as steam curing, widely used in the field for rapid producing. Most important experimental parameters were driven through preliminary experiments and were evaluated in terms of concrete properties. It is found from aggregate-replacement tests that all of consistency and strengths of concrete were decreased as the ratio of recycled fine aggregate increased, and the amount of decrease can be estimated using proposed equations. Though the recycled fine aggregate showed a decrease of concrete properties more or less, the applicability in large volume as a constituent of precast product was well noted from experimental results.

• Resources Recycling
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• v.28 no.5
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• pp.3-18
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• 2019

Due to the increasing demand for clean energy, the consumption of lithium ion batteries (LIBs) is expected to grow steadily. Therefore, stable supply of lithium is becoming an important issue globally. Commercially, most of lithium is produced from the brine and minerals viz., spodumene, although various processes/technologies have been developed to recover lithium from other resources such as low grade ores, clays, seawaters and waste lithium ion batteries. In particular, commercialization of such recycling technologies for end-of-life LIBs being generated from various sources including mobile phones and electric vehicles(EVs), has a great potential. This review presents the commercial processes and also the emerging technologies for exploiting minerals and brines, besides that of newly developed lithium-recovery-processes for the waste LIBs. In addition, the future lithium-supply is discussed from the technical point of view. Amongst the emerging processes being developed for lithium recovery from low-grade ores, focus is mostly on the pyro-cum-hydrometallurgical based approaches, though only a few of such approaches have matured. Because of low recycling rate (<1%) of lithium globally compared to the consumption of lithium ion batteries (56% of lithium produced currently), processing of secondary resources could be foresighted as the grand opportunity. Considering the carbon economy, environment, and energy concerns, the hydrometallurgical process may potentially resolve the issue.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.13 no.6
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• pp.93-99
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• 2013

The proposed protocol is to get better performance compared to the existing method, also it can save the node number. There is needed a lot of secondary user for cooperative spectrum detection in Rayleigh fading channel. In this proposal, we suggest the new cooperative spectrum detector which can choose one secondary user with high power, while other SUs can be used as relays.

• KPRC NEWS
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• no.9
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• pp.6-9
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• 2005

본 기고는 3차에 걸쳐 연재될 예정입니다.

• Korea Petroleum Association Journal
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• no.2 s.72
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• pp.46-52
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• 1987