부순굵은골재를 이용한 콘크리트 品質特性에 관한 연구 : 南原地域

金容俊 조선대학교 2003 국내석사

Many engineering works and building structures are constructed in today's construction site. However there exist apprehensions about early aging like expensive maintain and repair cost and cracking phenomenon that even not to full fill the expected valid endurance year due to consuming of incongruent materials and flimsy construction. Therefore this thesis grasp the suitability of thick crushed aggregate from Nam Won area that consist of 70% ∼ 80% in concrete by physical, chemical and properties of matters ways study and analysis. Thesis compared the physical and chemical quality character of thick crushed aggregate from Nam Won area for concrete with quality character mutually. As the result, thick crushed aggregate from Nam Won area is suitable aggregate for concrete and requested strength of concrete can be obtained if it improves the grading and type to decrease the porosity. And mutual relation usually coincide with the properties of matters. It is considered that other conditions of materials can be factors that may make error in value. This thesis aim for suggesting proper application to use thick crushed aggregate for concrete and ultimately improving the quality of concrete by grasping the character of quality of thick crushed aggregate from Nam Won area as for the concrete.

第6次 敎育課程의 中學校 道德科 價値探究 授業指導에 관한 硏究 : 2學年 敎科書 分析을 中心으로

김용준 한국교원대학교 1997 국내석사

飼料 中 機能性物質 使用에 의한 鷄卵의 品質 向上 硏究 /d김용준

김용준 강원대학교 교육대학원 2003 국내석사

政府糧穀 管理制度의 改善方案 : 2重 穀價制를 中心으로

김용준 全南大學校 行政大學院 1984 국내석사

米穀과 麥類에 對한 2重穀價制는 生産農民의 所得增大와 消費者 家計의 負擔節減을 通해 國民經濟에 많은 貢獻을 하여 왔으나 糧特計定의 赤字와 이로 인한 인플레 問題를 惹起시켰다. 糧穀管理基金法이 公布된 1970年以後 2重穀價 政策으로 因한 糧特赤字는 每年 發生되어 1983年末現在 l兆5,835億원에 達하고 있으며 最近 開放農政이 擡頭되면서 그 深刻性이 더해가고 있다. 따라서 本 硏究는 그간 實施해 온 2重穀價制의 內容과 問題點을 分析하고 2重穀價制를 包含한 政府糧穀管理制度의 改善方案을 模索하기 爲하여 第2章에서 2重穀價制의 理論的 背景으로 2重穀價制의 槪念, 期待效果, 外國의 糧穀管理制度를 紹介하고 第3, 4章에서 2重穀價制의 理論을 基礎로 하여 韓國2重穀價制의 現況과 問題點을 比較 分析하고 第5章에서 糧穀管理制度의 改善方案 第6章에서 要約과 結論을 記述하였다. 그간 2重穀價制 實施로 結果된 農家 所得增大와 都市消費者들의 消費支出減少 效果는 「인플레」에 依한 否定的 效果보다 훨씬 크게 나타나고 있으므로 앞으로 糧穀管理 政策은 現行 2重穀價制度를 維持하면서 政府의 介入을 줄이고 市場經濟原理에 가깝게 接近시키면서 糧特赤宇를 더이상 擴大시키지 않고 物價를 安定시키는 方向으로 改善되어야한다. 이를 위한 代案으로서는 (1) 政府糧穀 放出價格을 適正 季節 變動幅을 適用하여 端境期에 上向 調整하고 秋收期에 下向調整하여 差等價格으로 放出하므로서 糧特赤字를 解消하고 (2) 政府糧穀收買價格은 農家所得增大에 直接 影響을 주기 때문에 價格決定은 實地 收買價를 保障하는 水準에서 決定되어야 한다. (3) 糧穀管理要員의 精銳化, 糧穀管理의 電算化等 政府糧穀管理 行政을 科學化하므로서 糧穀管理費用을 節減해 나가야 한다. (4) 政府糧穀管理 規模는 年次的으로 適正規模로 縮少하면서 民間 流通機構가 糧穀의 需給과 價格調節 機能을 充分히 發揮할 수 있도록 商人 流通組織을 育成해야 한다. (5) 糧穀價格 現實化에 따른 都市 低所得層의 保護는 繼續되어야 하며 이에 따른 費用은 社會保障測面에서 一般財政에서 支援되어야 한다. (6) 政府收買糧穀은 收買에서 販賣까지 品種과 品質에 따라 等級化하여 政府糧穀의 品位를 높이고 消費者 嗜好에 따라 販賣가 이루어져야 한다. The Different Price System of Rice and Barley has contributed to the national economy by increasing the income of farmers and bringing the curtailment of the burden to the consuming public. The system, however, caused the deficit in the special accounts of grain and inflation. Since the promulgation of the Law of Grain Management Fund in 1970, the double grain price policy brought about the deficit in the special accounts of grain every year. The amounts of the deficit as of the end of 1983 are one trillion, 583 billion and 500 million won. With the coming out of the open-agricultural policy, the difficulty of the problem grew more and more serious. This study aims to find a plan for the improvement on the governmental grain management by analyzing the contents and problems of the double grain price system. In the second chapter, I present the theoretical ground for the double grain price system, the concept of the system, and its expected effects. Some grain management systems in foreign countries are also introduced. I compare the present condition in Korea under the double grain price system and its problems, and analyze them on the basis of the theory of the system in the third and fourth chapters. The following chapter shows a plan for the improvement on the grain management system. The summary and conclusion of this study are described in the final chapter. The different price system has brought the effects of increasing the income of farmers and curtailment in urban consumers' living expense. Though there are some negative effects from inflation, the system can be proved fruitful. So the present different price system must be maintained for the grain management policy for the future. Reducing the intervention in the system, the government should make the policy approach the market economy principle. Simultaneously the policy should be the scheme which does not expand the differential price system-related deficit in order to stabilize prices. The alternative plans for the improvement are as follows: (1) The release price of government-stock rice should be adjusted upward during the preharvest months and be adjusted downward during the time of harvest by applying the range of fluctuation according to the reasonable seasons in prices. When governmental rice is released with differential prices, the problem in the differential price system-related deficit will be solved. (2) Since the Governmental purchasing price of rice has an influence on the increasing of the income of farmers immediately, the price should be determined in the level of guaranteeing the actual purchasing price. (3) The amount of expenses for the grain management should be cut down by scientification of food grains administrative management, which includes the methods of making the management personnels elites and the computerization of Grains Administrative Management. (4) While the scope of the governmental grain management should be reduced appropriately every year, a circulating organization which consists of private traders should be promoted. This plan will make the organization act to the best of its abilities that adjust the demand and supply of grains and the price. (5) The governmental protection for a low income-group in towns, which is one of the problems caused by readjusting the price to a realistic by the financial help from the general accounts in the side of social security. (6) It will be possible that improving the governmental purchasing rice in quality and marketing it complying with the consumer's preference by grading the species and quality of grains from the time of purchasing to marketing.

금강수계 토양 중 PFCs 잔류특성

김용준 淸州大學校 2011 국내석사

In this study, the residual characteristics of perfluorinated compounds (PFCs) are examined in Geum river basin. The Stockholm Convention on persistent organic pollutants holding in 2004 is designated the 12 species of the persistent organic pollutants (POPs) and added to the 9 species of new POPs in 2009. Therefore, the 21 species of POPs is designated until the present. A concern about perfluorinated compounds, recently, has been increasing as the Perfluorooctane sulfonic acid(PFOS), its salts and Perfluorooctane sulfonyl fluoride(PFOS-F) among the new POPs were included. PFCs are persistent and widely distributed in the environment. Especially, perfluorinated carboxylates and sulfonates, represent special chemicals with specific technological properties. Following several decades of commercial use, PFCs have been discovered to be globally distributed and persistent environmental contaminants. The fluorinated surfactants are fluorinated organic compound artificially combined. The Fluorinated surfactants are studied grobally because it is difficult to break down the environment, moreover, the accumulation level is high. PFOA, PFOS as represent matters of PFCs are highly detected in the environment. And the best feature of PFCs is having high stability in natural environment without artificial condition. To evaluate the probability of exposure to human and ecosystem, the research analyzed the Perfluorinated compounds(PFOA, PFOS besides 12 species) designated POPs based on existing study method. To investigate on concentration of PFCs, the sampling sites selected the 24 sites in Geum river basin and the 8 sites near the sewage and waste water treatment plant. The Method Detection Limit(MDL) in this experiment was PFHxA 1.15 ng/g, PFHpA 0.61 ng/g, PFOA 1.09 ng/g, PFHxS 1.10 ng/g, 8:2FTUCA 3.13 ng/g, PFNA 0.93 ng/g, PFDA 0.88 ng/g, PFOS 1.08 ng/g, N-MeFOSAA 5.52 ng/g, N-EtFOSAA 7.50 ng/g, PFUnDA 1.88 ng/g, PFDoDA 2.66 ng/g, PFDS 2.59 ng/g, and PFTrDA 2.94 ng/g. The concentrations of PFOA and PFOS in 24 selected sites were in the range of N.D.~2.037 ng/g-dry wt, N.D.~1.695ng/g-dry wt, respectively. The compounds of 12 species except for PFOA and PFOS were N.D. or <MDL. Especially, the concentrations of PFDA and PFUnDA were in the range of N.D.~0.992 ng/g-dry wt., and N.D.~0.198 ng/g-dry wt, respectively. The total PFCs(∑PFCs) was in the range of N.D.~24.736 ng/g-dry wt. and the average PFCs was 1.864 ng/g-dry wt. The total PFCs near the sewage water treatment plant of Geum river basin investigated in the study was in the range of 0.266~0.675 ng/g-dry wt. And the total PFCs near the waste water treatment plant of Geum river basin investigated in the study was in the range of N.D.~24.736 ng/g-dry wt. As mentioned above, the total PFCs nearby waste water treatment plant was more than the value nearby sewage water treatment plant.

경계조건을 고려한 충전 절리면의 전단특성

김용준 영남대학교 2001 국내박사

경계조건을 고려한 충전 절리면의 절단특성

김용준 嶺南大學校 大學院 2000 국내박사

온도조건에 따른 자동차 사이드 에어백 전개시간에 관한 연구

김용준 공주대학교 일반대학원 2019 국내석사

A side airbag has been installed in the vehicle seat to provide protection for passengers and it is operated through generation of nitrogen gas through a combustion of solid chemicals, which is harmless to humans, inside the airbag by the impact detection sensor if collision of the automobile occurs. The airbag quickly inflates within the average time of 0.03~0.06 seconds for its full operation from the time of collision to protect the passengers. It is a device installed to protect the heads of the passengers and to prevent them from being thrown out of the vehicle in the event of a lateral collision or roll-over accidents. Nitrogen generated inside the airbag provides a cushioning effect to prolong the time of the collision of passengers against the interior aspects of the vehicle. Therefore, the relative impact force is reduced to reduce the impact, that is, the size of the force exerted onto the passengers in turn ensures that they will incur fewer and less severe injuries. The deployment phenomenon in accordance with the environmental conditions of the side airbag (high temperature of 85℃, low temperature of -35℃, and room temperature of 21℃) was the quickest at the highest temperature in all of the large and mid-sized vehicles, followed by those at room and the lowest temperatures. This is because the elongation characteristic of the covering is better and the pad is softer when the temperature is higher Therefore, this study is on the time taken for the deployment of the side airbag in large and mid-sized vehicles in accordance with the environmental conditions. The purpose of this chapter was to confirm the time of deployment of the side airbag in accordance with the environmental conditions.

품질마이닝 기법을 이용한 공정 파라미터 허용차 알고리즘 개발

김용준 인천대학교 일반대학원 2016 국내박사

최근 제조업 분야에서는 급속히 발달하는 정보 기술과 자동화에 따라 하루에도 수천 수만의 다양한 품질 변수들이 추정되고 데이터베이스화되고 있다. 기존의 통계적 기법이나 관련 전문가에 의한 변수 선택과 해석은 정확한 판단에 한계를 가지고 있다. 따라서 최근에는 의사결정나무를 포함한 다양한 데이터 마이닝 기법들이 이용되고 있다. 의사결정나무 분석에서 CART와 C5.0이 대표적인 알고리즘이나, 연속형 설명변수의 허용차를 도출하는데 한계를 가지고 있어 이를 개선할 유용한 알고리즘의 필요성이 대두되고 있다. 또한, 목표변수가 제품의 품질을 나타내는 정보에만 한정되어, 이를 보완하는 품질 정보에 대한 접근이 필요하게 되었다. 이에 본 논문에서는 손실 비용을 목표변수로 설정하여 이를 최소화하는 주요 변수를 찾는 동시에 CART와 C5.0의 한계점을 극복하는 새로운 알고리즘을 개발하였다. 새로운 알고리즘은 연속형 설명변수의 3개 범주화를 도입하여 체계적인 방법으로 허용차를 도출하는 알고리즘이다. 새로운 알고리즘과 기존 알고리즘의 성능 비교를 위하여 프로그래밍 R 환경에서 망목, 망소, 망대 특성치를 가정한 후 각 변수 별로 1,000개 데이터씩 10개의 시뮬레이션 세트를 발생하였다. 그리고 손실비용의 평균치 검정을 통해 새로운 알고리즘의 성능을 검증하였다. 검증 결과, 새로운 알고리즘이 망목, 망소, 망대 특성 모두에서 기존의 알고리즘에 비하여 손실비용을 더 작게 하는 연속형 설명 변수의 허용차를 구할 수 있음을 확인하였다. 따라서, 새로운 알고리즘은 제품의 손실비용을 고려하는 공정에서 이를 최소화하는 연속형 설명 변수의 허용차를 찾기 위해 유용하게 사용될 수 있다. Among the information technology and automation that have rapidly developed within the manufacturing fields recently, tens of thousands of quality variables are estimated and categorized in databases every day. The existing statistical methods, or variable selection and interpretation by experts, place limits on proper judgment. Accordingly, various data mining methods, including decision tree analysis, have been developed recently. Cart and C5.0 are representative algorithms for decision tree analysis, but these algorithms have limits in defining the tolerance of continuous explanatory variables. Also, target variables are restricted by the information that indicates only the quality of the products. So it is necessary to develop an algorithm that improves upon Cart and C5.0 and allows access to new quality information such as loss costs. In this study, a new algorithm was developed not only to find the major variables which minimize the target variable, loss costs, but also to overcome the limits of Cart and C5.0. The new algorithm is one that defines tolerance systematically by adopting 3 categories of the continuous explanatory variables. The characteristics of 'nominal-the-best', 'smaller-the-better' and 'larger-the-better' were presumed in the environment of programming R to compare the performances of the new algorithm and existing ones, and 10 simulation sets were generated with 1,000 data sets for each variable. The performance of the new algorithm was verified through a mean test of loss costs. As the results of the verification show, the new algorithm found that the tolerance of continuous explanatory variables lowers loss costs more than existing ones in all the set characteristics. Therefore, the new algorithm can be used to find the tolerance of continuous explanatory variables to minimize the loss in the process taking into account the loss costs of the products.

USB transceiver 디지털 블록의 구현

김용준 포항공과대학교 2003 국내석사