• 한국토양비료학회지
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• 제44권6호
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• pp.1063-1070
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• 2011

본 연구는 수용액 내 존재하는 Cd, Pb을 다양한 화학적 안정화제를 이용하여 안정화 효율성을 평가하였다. 연구에 사용한 안정화제는 중금속 이온과의 반응특성 별로 석회물질, 광물질 등으로 구분하여 문헌조사를 바탕으로 5종을 선정하여 사용했다. 안정화 효율성 평가방법은 용액 내 중금속 함량을 단계적으로 제조하여 안정화 효율성, 반감기 및 반응속도 산정 및 반응 후 안정화제의 반응생성물 확인의 순으로 진행했다. 안정화 효율성 평가결과 석회물질 ($CaCO_3$)을 다량 함유하여 기본적으로 pH를 8이상으로 교정하는 안정화제의 경우 처리량에 상관없이 대부분 불용화되는 것으로 나타났으며, 낮은 산도교정 물질은 50% 수준의 효율성을 갖는 것으로 나타났다. 또한, 효율성이 크게 나타난 물질을 대상으로 반응속도상수 (K)를 산출한 결과 Cd의 경우 처리량에 따라 증가하였지만, Pb의 경우 초기에 반응속도가 빠르게 일어나 처리량에 따른 평가는 불가능 하였다. 다량의 중금속 이온과 반응시킨 안정화제의 표면관찰을 통한 생성물 검정 결과 SEM 사진으로 반응 전 후의 생성물 확인을 간접적으로 확인하였다. 또한, SEM-EDS 분석결과 반응 후 물질 표면에서 Cd과 Pb의 성분 검출을 확인하였다. 그리고 XRD 분석을 통해 효율성이 좋았던 물질에서 Cd과 Pb 성분의 검출이 확인되어 수용액 상에 이온형태로 존재하는 중금속의 복원에 안정화제를 이용한 저감은 효율적일 것으로 판단된다.

• 한국교육학연구
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• 제22권1호
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• pp.25-51
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• 2016

이 연구는 2011년 제정된 고등교육법일부법률개정안(이하 강사법)에 대한 강사들의 인식을 분석하고 향후 이 법의 개정 방향에 대한 쟁점을 논의하기 위해 수행되었다. 이 연구에서는 두 가지 연구문제를 설정하였다. 첫째, 강사법 제정과 강사법의 주요 내용에 대해 강사들은 어떻게 인식하고 있는가? 둘째, 강사법 유예과정에서 정부와 강사노조가 제안한 강사법 개정(안) 및 강사법 개정 방향에 대해 강사들은 어떻게 인식하는가? 이를 위해, 연구자는 강사 및 고등교육 전문가 16명과 심층면담을 실시하였다. 연구결과, 강사들은 강사법 제정 및 도입 의의를 인정하면서도 정부의 생색내기 또는 선거용 입법으로 인식하였으며, 강사법 시행이 반쪽짜리 교원을 양성할 것으로 우려하였다. 또한 이들은 강사법이 강사들의 처우를 실질적으로 개선하는 방향, 예컨대 강사료 인상과 고용 안정화를 보장할 수 있도록 보완되어야 한다고 강조했다. 그러나 강사들의 연령과 전공영역에 따라 강사법 개정 방향에 대한 입장이 나뉘기도 했다. 분석결과를 토대로, 연구자는 강사법 대체법안 마련을 고등교육 재정 확보, 강사노조 또는 개별 강사들 간의 입장 차이, 한국 고등교육의 문제점 응축 등의 쟁점과 관련하여 논의하고 강사들의 처우 개선을 위한 몇 가지 방안을 제안하였다.

• 한국조경학회:학술대회논문집
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• 한국조경학회 1999년도 정기대회 및 학술논문발표회
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• pp.44-45
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• 1999

• 해양환경안전학회지
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• 제18권6호
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• pp.563-568
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• 2012

2010년 STCW 마닐라 수정안은 항해사에게 선교자원관리에 대한 지식 및 기능에 관한 해기능력을 강제적인 사항으로 포함하고 있다. 본 연구는 선교자원관리의 관점에서 STCW 2010 개정안에 토대를 둔 국내 교육 프로그램의 적절한 방향을 제안한다. 선교자원관리 프로그램과 관련하여 그 내용 및 교육방법이 국내 교육프로그램에 대한 설문조사를 통하여 분석되었다. 그 결과로서 본 연구는 현재의 선교자원관리 교육 프로그램을 개선하기 위한 몇 가지 제안을 한다.

• 한국중재학회지:중재연구
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• 제30권2호
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• pp.23-42
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• 2020

The purpose of this study is to analyze the characteristics of Vietnam's arbitration system and to present measures that companies can utilize in practice. This research considers KCAB International Arbitration Rules, focusing on amendments to the Decree on Vietnam Commercial Arbitration Act and amendments to the VIAC Arbitration Rules. To sum up some features, the decree on the Commercial Arbitration Act simplified the registration procedures for arbitration centers and their branches and made the publication of court decisions and the recognition of the approval and execution of foreign arbitration courts, thereby enhancing transparency. First of all, the decree on the Commercial Arbitration Act simplified registration procedures for arbitration centers and their branches. In addition, the court strengthened transparency by officially announcing court judgments, recognition, and decisions. Next, there are some points to note in the arbitration rules of the VIAC. First of all, the rules of expedited procedure lack clarity. Next, parties should make a separate document for counterclaim and submit it with a statement of defense. In addition, the arbitral language may choose multiple languages by the Arbitral Tribunal unless the parties agree. Therefore, companies need to take a closer look at their understanding of the international arbitration system, which is mainly used in international disputes, and the characteristics of the Vietnamese arbitration system.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2004년도 총회 및 춘계학술발표회
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• pp.125-130
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• 2004

This study has been assessed the influence of applying sewage sludge to soil amendments on the sorption properties, and leaching potential of three commonly used organophosphorus pesticides, Diazinon, Fenitrothion, and Chlorpyrifos. A sandy soil with a low content of organic carbon was treated with sewage sludge with a ratio sandy soil : sludge ratio of 30:1. The sorption was determined with the batch equilibrium technique. The sorption isotherms could be described by Freundlich equation. The Freundlich constant, K value which measures sorption capacity, were 3.97, 9.94, 22.48 for Diazinon, Fenitrothion, Chlorpyrifos in non-amended soil. But in amended soil, K value was 12.58, 28.47, and 61.21 for Diazinon, Fenitrothion, and Chlorpyrifos. The overall effect of sewage sludge addition to soil was to increase pesticides adsorption, due to the high sorption capacity of the organic matter. The effect of sludge on tile leaching of pesticides in the soil was studied using packed soil columns. Total recoveries of pesticides in soil and leachate with leaching in soil column, were in the range of about 73～84%, was reduced with the passage of time. Diazinon moved more rapidly than Chlorpyrifos in the unamended soil due to greater sorption and lower water solubility of Chlorpyrifos. Total amounts of pesticides leached from the sewage sludge amended soils were significantly reduced when compared with unamended soils. This reduction may be mainly due to and increase in sorption in amended soils, as a consequence of the increase in the organic matter content.

• The Plant Pathology Journal
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• 제20권4호
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• pp.277-282
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• 2004

Amendments of a recirculating nutrient solution with potassium silicate were evaluated as a means to control Phytophthora capsici infections on pepper plant(Capsicum annuum L.). Supplying the solutions with 100 or 200 ppm of silicate significantly reduced motility, root decay, and yield losses attributed to infection of P. capsici. Treating inoculated plants with potassium silicate increased root dry weights and number of fruit, especially high-grade fruit. Results were slightly superior to non-inoculated controls. The two varieties, PBC 137 and PBC 602, responded similarly to the treatments. No significant differences were observed between the 100- and 200 ppm silicate treatments. Results were better when greenhouse conditions favored the spread of P. capsici. Silicon alone did not increase pepper yield, suggesting that it acts as a disease suppression agent rather than as a fertilizer, The phenomena by which silicon confers protection against P. capsici infection and disease development are not fully understood, but our results indicate that mechanisms other than a mechanical barrier to fungal penetration are involved.

• 한국환경복원기술학회지
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• 제8권2호
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• pp.65-75
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• 2005

A green area plan is getting attention as a way to solve the recent urban problems such as the rise of environment problems. To correspond to this change, there were dramatic amendments for the green area related laws. These amendments are appraised as the epochal turning point for the green area policies. This study is to introduce the main contents of amended urban green area law and urban park law in Japan, to compare with the Korean green area related laws, and to summarize the special features of both countries' green policies and the comments about the Korean green area policy structures. As a result, this amendment of Japan established the unified green area policy structure supporting the green area policies of municipal governments and is inducing living environment improvement by securing green area in the center of city, support, and the participation of residents. On the other hands, this amendment of Korea is a lack of the systemization of green area policy and the phased establishments of green area plan in spite of the scope of whole city because of absence of the unified high level plan.

• 한국농공학회논문집
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• 제56권3호
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• pp.47-53
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• 2014

We investigated the effect of straw mat cover and soil amendments on the reduction of runoff, non-point source pollution load and yield of a Chinese cabbage from alpine fields. Two plots on sandy loam soil were prepared. Experimental treatments were control and rice straw mat cover (3,300 kg/ha)+Polyacrylamide (PAM) (5 kg/ha)+Gypsum (1 ton/ha) (SPG). A variety of Chinese cabbage was cultivated and runoff was monitored during a growing season in 2012. Monitoring was conducted to seven times. Runoff rate of SPG plot was lower than those of control plot. The reduction rate of runoff from SPG plot was 29.4 % compared to control plot. The reduction rate of suspended solids (SS), total nitrogen (TN) and total phosphorus (TP) load of SPG plot was 86.5 %, 34.7 % and 39.1 %, respectively. Yield of a Chinese cabbage from SPG plot (39,646 kg/ha) was greater than that of control plots (28,482 kg/ha). It was concluded that the use of SPG on soil surface could not only reduce the NPS pollution loads in receiving waters but also help increase the crop yield.

• 한국토양비료학회지
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• 제49권5호
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• pp.627-634
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• 2016

The objectives of this study were to select optimal soil amendments through analysis of heavy metal availability in soil and uptake to Aster koraiensis Nakai for forest rehabilitation of heavy metal contaminated soil of abandoned metal mine. A. koraiensis was cultivated for 6 months at contaminated soil with several soil treatments (bottom ash 1 and 2%, fly ash 1 and 2%, waste lime+oyster 1 and 2%, Acid mine drainage sludge (AMDS) 10 and 20%, compost 3.4%, non-contaminated natural forest soil, and control). The analysis results of heavy metal concentrations in the soil by Mehlich-3 mehthod, growth and heavy metal concentrations of A. koraiensis showed that waste oyster+lime 1% and compost were more effective than the other amendments for phytostabilization. However, it is needed comprehensive review of factors such as on-site condition, slope covering to reduce soil erosion and vegetation introduction from surround forest for revegetation to apply forest rehabilitation.