• Applied Chemistry for Engineering
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• v.28 no.6
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• pp.632-637
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• 2017

The vehicle lubricant occupies upto 35% in a total lubricant market and engine oil occupies upto 77% in the vehicle lubricant market in Korea. A suitable quality management of the circulating engine oil is necessary for driver and engine protection. But, KS and synthetic engine oil products (involved over 30% synthetic oil) are exempt to any quality management under Petroleum and Alternative Fuel Business Act. It is also known that synthetic oils such as PAO (poly alpha olefin) have excellent properties and performance like anti-wear, varnish control and oxidation stability than those of mineral oils. For this reason, PAO has been used for an engine oil, rotary screw and reciprocating compressor in addition to heavy duty and other extreme service applications. In this study, our research group analyzed the chromatogram pattern for the mineral oil, PAO and mineral oil involved a typical ratio of PAO using SIMDIST (simulated distillation). In the SIMDIST chromatogram, the mineral oil showed a broad peak, while PAO showed a sharp typical peak. Also the oil with a large viscosity grade exhibited a long retention time due to the heavy molecular weight and high boiling point. In particular, the blended mineral oil with 20% PAO sample showed a distinctly different pattern compared to that of using the conventional mineral oil. For monitoring PAO contents in distributing engine oils, we analyzed the SIMDIST for 27 kinds of engine oils which were popularly sold in Korea. The analytic results indicate that all kinds of engine oils showed that PAO contents were below 20% in engine oil products. Moreover, the PAO titled product was found to have a small amount of PAO. Thus, we conclude that the related laws for the proper quality management of synthetic oils are needed to be established.

• Korean Journal of Environmental Agriculture
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• v.11 no.3
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• pp.209-214
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• 1992

Residue of Propineb in Sesame(Sesamum indicum L.) seed was determined to establish an index for the safety use of Propineb to Sesame. Evaluation was made on residual concentration of Propineb in Sesame seed as a function of application frequency and date when the mixed formulations of Propineb(56%), protectant fungicide, and Oxadixyl(8%), contact fungicide, were sprayed into Sesame leaves. Level of Propineb treatment was $0.028g/m^2$ with various combinations of application time from three to sixty days before harvest. Results are summarized as followings. 1. Recovery percentages of Propineb from Sesame seed were ranged from 84 to 96, and the minimum detectable limit of Propineb with the method employed in this experiment was 0.03mg/kg. 2. Residues of Propineb in Sesame seed were in the ranges of 0.14 to 1.38mg/kg, varying with frequency and date of Propineb application. 3. Residues of Propineb increased as increasing application frequency of Propineb or as being application date closer to harvest time. 4. Residue of Propineb in Sesame seed was decreased with time, showing to be fitted to the first-order kinetics. 5. Residues of Propineb in Sesame seen were, irresepective of treatments, lower than 2mg/kg, the Maximum Residue Limit(MRL) established by FAO/WHO. 6. Half-life of Propineb determined in this experiment was ranged from 12 to 16 days.

• Ecology and Resilient Infrastructure
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• v.7 no.3
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• pp.160-170
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• 2020

Railroads and roads are typical linear projects, and their networks are expanding nationwide. To minimize the impact of their development on the environment, ecological disconnection due to the parallel lines of railroads and roads is to be avoided as much as possible. In this study, to examine the environmental impact of railroad and road development, the characteristics of railroads and roads and the differences between them were examined through a comparative analysis of key evaluation items. Based on the result, the road development, unlike the railroad project, suggests items for establishing an efficient land use plan and soil protection as the key evaluation items. There are no specific evaluation items and criteria that can be used to examine the environmental impact of railroad lines located adjacent to roads. In this study, eight evaluation items were suggested by reviewing the relevant literature. In particular, in the strategic environmental impact assessment stage, which examines the adequacy and location feasibility of the plan, the minimum separation distance criteria were proposed to examine in advance the environmental impact of railroads located adjacent to the existing roads. The distances were examined for the previously operated routes, and a distance of less than 200 m was suggested to minimize the environmental impact. The results were compared with those in other studies and analyzed. The results of this study can be used as a basis for examining alternative routes that can minimize the environmental impact of adjacent railroads and roads.

• Research in Plant Disease
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• v.24 no.1
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• pp.33-40
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• 2018

This study was conducted to evaluate the antifungal activity of 19 agro-materials that have been registered for organic cultivation in Korea, after inoculation of pear leaves with Venturia nashicola and Gymnosporangium asiaticum. In V. nashicola, most of the nine agro- materials containing sulfur and copper completely inhibited spore germination, and some of the spores that germinated did not form appressoria. However, in only lime sulfur, Neobordeaux (cupric sulfate), and Wheengaris (sulfur)showed antifungal activity against G. asiaticum. Among the agro-materials containing plant extracts, Wheengarujaba (wood vinegar+spirits+rhubarb) inhibited conidial germination in V. nashicola and G. asiaticum by 100% and 71.6%, respectively. Among the agro-materials containing antifungal microorganisms, Cheongotan (Streptomyces griseus) reduced spore germination rate of V. nashicola to 88.8%; moreover, formation of appressoria or intracellular accumulation was not observed. Application of Topsid (Paenibacillus polymyxa) reduced spore germination rates in V. nashicola and G. asiaticum to 71.0% and 90.6%, respectively, and the formation of appressoria was not observed. Studying the antifungal activity of agro-materials because of cumulative applications under the field conditions is necessary, owing to their contact fungicidal effect and the induced-resistance by microbial metabolites and natural compounds.

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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• v.18 no.2
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• pp.104-109
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• 2013

The spawning characteristics of Hexagrammos agrammus and Hexagrammos otakii was directly observed in coastal regions of the Yellow Sea and South Sea during the spawning seasons using scuba diving. The territorial male H. agrammus showed different body size, nuptial coloration and nest location compared to those of H. otakii, even though both species caring egg masses were found at the almost same depths. In the West sea, a relatively small guardian H. agrammus male protects 1-2 egg masses laid on a clump of red algae within his territory. The territorial males in red nuptial coloration and their egg masses were well camouflaged in their surroundings. Contrary to H. agammus, a guardian H. otakii male in yellowish nuptial coloration protects 4-8 egg masses in a nest. In addition, their nests were located on the relatively open environments such as discarded fishing nets, rock crevices and a clump of algae. The results of present study shows that even though both of two species belonged to Hexagrammidae, they have different strategies for spawning and protecting their egg masses.

• Korean Security Journal
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• no.58
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• pp.195-213
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• 2019

「Security Services Industry Act」made in 1976 for the purpose of contributing to the good operation of services industry by establishing the requirements for promotion, development and systematic management of services industry has been since 26 times of overall revisions. Period division of private security through overall revision of 「Security Services Industry Act」 can be roughly divided into three periods. The first is a settlement period. It is a period when the present five business areas were completed rom 1976 to 2001. Beginning with facility and escort security in 1996, five types of jobs have been prepared. so far by adding personal protection in 1996, and machine and special security in 2001. The second is a quantitative growth period. It is a period when quantitative development is made on the institutional basis. As various culture, sports and arts events are increasing based on the demand of security services due to an increase in the people's sense of security, quantitative development was made, which additionally influenced the downward trend of capital and the possibility of having two jobs through revisions. The third is a qualitative growth period. From 2013 to the present is a period when quantitative growth has slowed and qualitative growth has been made. After the period of quantitative growth, the growth slowed down. However, by raising the criteria for permission of services industry through creation of a rule for the group civil petition, by raising capital, by institutionally compensating for diverse punishment regulations, by realizing the training hours for new security guards, by permitting private education, etc, the reliability and professionality of a security guard job has been to be recovered.

• Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
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• 2000.11a
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• pp.82-82
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• 2000

16세기부터 씌워진 과실봉지는 초기 병해충을 방지할 목적만으로 사용되었지만, 현재는 방균과 방충의 효과와 함께 자연현상의 최적화를 위한 차광성, 발수성, 투기성 및 투습성 등 을 조절하며 과실의 외관과 과중 및 당도에까지 영향을 미치는 바 과실봉지의 기능성 부여 를 위해서는 고도의 기술력이 요구되고 있다 하겠다. 실제 과실봉지를 적용하는 한 예로서 “배”를 들 수 있는데, 그 중 황금배는 흑반병, 각 종 병충해 및 동녹으로 인한 상품가치의 하락으로 현재 수요를 충족시키지 못하고 있는 실 정이다. 과피의 비정상적인 코르크화로 인해 발생하는 동녹은 과피의 물리적 할렬과 생리적 장해에 의해 발생하는 것으로 알려져 있다. 과실이 비대해짐에 따라 과피의 기공(과점)이 할 렬하면서 코르크화가 진행되는데 그 발생정도나 시기는 배의 품종에 따라 다르나 일반적으 로 코르크화는 기상조건, 특히 습도와 밀접한 관련이 있다. 황금배의 재배에 봉지를 적용하면 과피의 코르크화가 억제되는데 봉지 내의 대기 환경 이 외기보다 안정적으로 유지되고 직사광선이나 농약 및 마찰로부터 과실을 보호해 주기에 동녹이 어느 정도 방지될 수 있다. 만일 과실이 외부로부터 받는 자극을 적절히 조절하는 기능성 봉지가 제 역할을 다해줄 수 있다면 동녹을 방지하여 외관을 개선함은 물론, 배의 성장에 적합한 미시대기 조건을 제공함에 따라 보다 높은 당도를 지닌 대과의 재배가 가능 하다고 판단된다. 그러나 기존의 황금배봉지는 동녹의 정도를 완화시킬 뿐 완전히 방지할 수 없었으며, 봉지를 적용한 재배조건에서의 동녹 발생기구를 정확히 이해하지 못했었기에 효과적으로 봉지의 기능을 개선하는 것이 불가능하였다. 과실의 미려도는 과실의 맛과 함께 그 가치를 결정짓는 중요한 물성으로서 우리나라 황 금배 재배환경과 특성에 알맞은 배봉지의 제작이 선결될 때, 배 품질의 향상, 안정된 공급이 가능하게 될 것이며 아울러 농가의 수입증대와 수출 경쟁력 강화가 이루어질 수 있을 것으 로 판단된다. 이러한 측면에서 황금배 재배농가가 당면한 동녹발생의 문제점을 효과적으로 해결하고 아울러 기타 과실의 재배용 봉지의 기능성 부여를 위한 새로운 과실 봉지 처리 기 술의 개발이 절실히 요구되고 있다. 상기한 측면에서 본 연구에서는 과실봉지를 적용했을 때 봉지 내의 미시대기 조건이 봉 지의 특성에 따라 변화되는 양상을 파악하기 위해서 실험실적으로 field 조건을 모사하고 봉 지 내의 온도 및 습도를 측정 분석하였다. 아울러 봉지 종류간에 동녹발생 정도가 상이한 점에 예의 주시하여 다양한 봉지의 적용실험을 통해 최적의 과실봉지 조건을 탐색하였다.

• Journal of Korean Public Health Nursing
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• v.10 no.1
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• pp.58-79
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• 1996

재미 한인들의 급격한 증가와 더불어 미국 간호학의 한인들에 대한 문화적 지식의 유입을 필요로 하게 하였다. 더구나 기존 연구들은 한인들이 질병을 비효율적이며 부적절하게 관리하는 것으로 보고하고 있어 이에 대한 연구의 필요성이 더욱 증가하였다. 기존 연구에 의하면 초기 이민 경험은 이민자들의 건강과 질병 관리에 크게 영향을 미치는 것으로 나타났다. 이 연구에서는 비평적 문헌 고찰을 통하여 초기 이민 경험이 재미 한인들의 질병관리에 어떻게 영향을 미치는지에 관하여 살펴보고 이에 근거하여 재미 한인들을 위한 적절한 간호의 방향을 제시하고자 했다. 의학도서 목록 전산망과 기타 문헌 자료를 이용하여 1966년부터 1995년까지의 의학, 보건학, 생물학, 심리학, 사회학 문헌들을 살펴보았다. 체계적인 문헌 고찰을 위하여 4개의 세부적인 주제 아래 문헌들을 구분하여 고찰하였다 첫째. 일반적인 이민자들의 초기 이민경험, 건강, 질병 관리가 고찰되었고. 둘째로 재미 한인들의 초기 이민 경험이 고찰되어졌으며, 셋째로, 재미 한인들의 건강. 질병관리가 고찰되어졌고, 마지막으로 이들을 위한 간호의 방향을 제시해 줄 기존의 간호 모델들이 고찰되어졌다. 문헌 고찰 결과, 재미 한인들의 부적절한 질병 관리는 그들의 초기 이민 경험들과 관련되는 것으로 나타났다 첫째 문화적으로 결정되어진 신념이나 태도들이 재미 한인들의 적절한 질병 관리를 방해하는 것으로 나타났다. 둘째, 재미 한인들도 본국인들과 마찬가지로 질병관리를 위해 현대의학. 한방, 무속, 민간요법을 사용하는 것으로 나타났는데. 한방의 사용이나 이러한 치료법들의 흔용은 한인들의 적절한 질병 관리를 방해하는 것으로 나타났다. 셋째, 문화적 차이, 언어장벽, 그리고 비언어적 의사소통의 차이점에서 오는 오해들이 재미 한인들의 질병 관리를 부적절하게 만드는 것으로 나타났다. 넷째, 이민생활에서 오는 여러 어려움들 또한 재미 한인들의 질병관리를 어렵게 만드는 것으로 나타났으며, 다섯째. 사회적 지지의 부족 역시 재미 한인들의 적절한 질병관리를 힘들게 하는 것으로 나타났다. 마지막으로 적절한 간호 모델의 부재가 이들을 위한 적절한 간호의 제공을 어렵게 하고 있는 것으로 밝혀졌다. 이러한 결과에 근거를 두고 초기 이민 적응기에 있는 재미 한인들에게 적절한 간호를 제공하기 위한 몇 가지 제안들이 제시되었다. 첫째, 이민자들에게 적절한 간호가 제공되기 위해서도 문화적 배경을 고려해야 하겠다. 문화적으로 적절한 간호를 위해서 간호 제공자들은 자신들의 문화와 다른 간호 대상자의 문화도 존중해 주어야 하며, 문화적으로 결정되어진 건강 신념들과 질병 관리 행태도 생명을 위협하지 않는 한 존중해 주어야 할 것이다. 또한 간호제공자들은 자문화 중심적인 사고방식에서 벗어나야 하며, 간호 대상자들의 상황을 총괄적으로 이해하여야 하고 이민자들의 어려움에 대해 공감을 가지고 간호를 제공하여야 하겠다. 둘째, 간호 제공자들은 한방에 관한 지식을 가지고 한 의학 혼용으로 인한 위험으로부터 간호 대상자를 보호하여야 할 것이다. 셋째, 문화적 차이나 자민족 중심적 사고방식으로 인한 오해를 막기 위하여 간호 제공자들은 간호 대상자와 자주 상호 교류함으로써 배우는 자세로 간호 대상자를 대하여야 할 것이며, 자신의 자민족 중심적인 사고방식을 인지하고 언어적, 비언어적 의사소통의 문화 집단별 차이를 앎으로써 오해의 소지를 줄여야 할 것이다. 넷째, 적절한 간호의 제공을 위하여 의사소통을 위해 대화만을 직접 번역해 주는 통역자와는 달리 문화적 배경까지도 이해하고 해석해 주는 문화적 통역자의 도움을 밟아야 할 것이다. 다섯째, 한국문화는 가족 중심적 문화이므로 간호 대상자의 혈연관계를 이해하고 그에게 크게 영향을 주는 가족원을 간호 중재에 참여시킴으로써 치료 효과를 높여야 할 것이다. 마지막으로 효과적인 간호를 위하여 재미 한인을 위한 적절한 간호 모델을 개발함으로써 체계적인 간호의 방향을 제시할 수 있어야 할 것이다.

• Journal of Environmental Policy
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• v.7 no.3
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• pp.63-88
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• 2008

In this treatise I have advanced a theory to regulate legal problems rationally arising from a right to a view and I have checked some precedents dealing with the temporary injunction, compensation for damage and the demolition of a house(mainly apartment) owing to an infringement of a right to a view. Relating to an infringement of a right to a view, there are more lawsuits which are instituted together with an infringement of a right to enjoy sunshine than lawsuits related only to the right to a view. In the cases of an infringement of a right to a view connects with educational or religious environment, the court made it a decision that the construction is prohibited from constructing more than a certain-story building to protect a right to a view. Plaintiffs won a case their suit in the original judgement regarding a claim for damages owing to an infringement of a right to a view, but the Supreme Court reversed the decision of a lower court. The right to a sky view should not be infringed in case of a dwelling house which is not built for the purpose of business or a view.

• Journal of the Korean Geographical Society
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• v.49 no.6
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• pp.812-832
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• 2014

We analyzed physical and chemical properties of sediments from 20 subtidal points and 9 beach points to define sedimentary environment between summer and winter of Shindu Marine Protected Area. Means of particle size in summer were generally finer than winter's. There was distinctively spatial pattern that particle sizes became increasingly fine as west direction and apart from beach in summer, but this pattern was not shown in winter. Coarse sediments were prevailed in winter. To explain these patterns, we propose possible two causes which are spatially different water depth condition related with seasonal wave climate or fine sediment input from an estuary located in south of this area during summer rainy season. Contents of exchangeable cations of sediment in summer were shown $Na^+$>$Ca^{2+}$>$Mg^{2+}$>$K^+$ in order, but those of winter were shown $Na^+$>$Mg^{2+}{\fallingdotseq}Ca^{2+}$>$K^+$. Contents of $Na^+$, $Mg^{2+}$, and $K^+$ were related with contents of fine sediment and showed high correlation in each other. These relations were not shown between $Ca^{2+}$ and others. Our results show that there are spatio-temporal unique sedimentary environments between subtidal zone, beach, and dune near Shindu Marine Protected Area. Therefore, we should consider these spatio-temporal patterns for environmentally sound management of Shindu coastal system.