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국산 Lidocaine 알칼리화를 위한 Bicarbonate 혼합시 침전유발 최소량에 대한 고찰
이선호,김현수,곽인숙,안원식,최관호,김광민,손민제 대한마취과학회 2000 Korean Journal of Anesthesiology Vol.39 No.5
Background : When local anesthetics for regional anesthesia is used, usually small amounts of bicar-bonate are added for rapid onset. This addition gives the mixed solution a more alkaline pH. The following result is an increased unionized form of the local anesthetic and rapid penetration of the drug into tiissue. Unfortunately, no data about adequate mixing volumes of domestic lidocaine and bicarbonate is available. Methods : We examined six mixing pairs of two kinds of 2% lidocaines and three kinds of 8.4% bicarbonates for minimum volumes of bicarbonate to cause a precipitation of 2% 20 ml lidocaine. Results : The mean volumes of bicarbonate to cause precipitation were 1.54 ml for Kwang-Myung lidocaine with Kwang-Myung bicarbonate, 2.90 ml for Kwang-Myung lidocaine with Dae-Won bicarbonate, 2.73 ml for Kwang-Myung lidocaine with Je-Il bicarbonate, 0.97 ml for Je-Il lidocaine with Kwang-Myung bicarbonate, 1.26ml for Je-Il lidocaine with Dae-Won bicarbonate and 1.39 ml for Je-Il lidocaine with Je-Il bicarbonate. Conclusions : We conclude that the Kwang-Myung lidocaine and the Je-Il lidocaine could cause precipitation when mixing with a smaller bicarbonate volume than foreign textbook recommended. (Korean J Anesthesiol 2000; 39: 726-729)
PLASMA 이온 질화처리 한 Ti-6Al-4V의 표면물성에 관한 연구
손명숙,허성강,윤재홍,이영생,박노광 國立 昌原大學校 産業技術硏究所 1997 産技硏論文集 Vol.11 No.-
The purpose of this study is to improve the surface hardness and corrosion resistance of Ti-6Al-4V by ion nitriding treatment. As well known, the ion nitriding is widely used an effective surface hardening method and principal parameters of the ion nitriding are temperature and time. Ti-6Al-4V alloys were ion-nitrided under the atmosphere of the nitrogen-hydrogen mixture gas and surface modified layers were observed. Experimental results represent that the surface modified layers are formed as a multiphases of TiN and Ti₂N. The hardness of the layers are in the range Hv of 1000 to 2000. The multiphase layers also showed excellent corrosion resistance in 2 Mol HCl solution at room temperature, comparing to the non-coated layers. The kinetics show that the growth of the layers by N₂ diffusion were proportional to t½. The kinetics energy for the formation of nitride layers was 174KJ/mol.
朴在弘,孫廣翼,韓健淵 경북대학교 산업기술연구소 1993 産業技術硏究誌 Vol.21 No.-
Unsteady flow in a natural river which meanders through a wide flood plain is complicated by large differences in hydraulic resistance and cross sectional geometry of the river channel and the floodplain. The unsteady flow is further complicated by the tendency for a portion of the flow to short-circuit along the more direct route afforded by the flood plain rather than following the longer route along the meandering channel. A mathmetical model for routing floods in meandering river with floodplains is presented. The one-dimensional equations modified such that the flow in the meandering channel and floodplain are identified separately. The floodplain model has been used to simulate flow in an idealized meandering river with a flood plain. Flood peak attenuation and travel time are found to increase as flood-plain roughness and width increase and as channel sinuosity decrease. Attenuation increase and travel time decreases as the flood plain flow increases.
민감도 분석을 이용한 필릿용접용 용접변수 선정에 관한 연구
정재원,김일수,김학형,손성우,김인주,전광석 한국공작기계학회 2008 한국공작기계학회 춘계학술대회논문집 Vol.2008 No.-
Arc welding process is one of the most important technologies to join metal plates. Robotic welding offers the reduced manufacturing cost sought, but its widespread use demands a means of sensing and correcting for inaccuracies in the part, the fixturing, and the robot. A number of problems that need to be addressed in robotic arc welding processes include sensing, joint tracking, and lack of adequate mathematical models for parameter prediction and quality control, Problems with parameter settings and quality control occur frequently in the GMA(Gas Metal Arc) welding process because of the large number of interactive parameters that must be set and accurately controlled. The objectives of this paper are to realize the mapping characteristics of bead width using a sensitivity analysis and develop the neural network and multiple regression method, and finally select the most accurate model in order to control the weld qua1ity(bead width) for fillet welding. The experimental results show that the proposed neural network estimator can predict bead width with reasonable accuracy, and guarantee the uniform weld quality.
동북아 고대 해상무역제도에 관한 고찰 : 장보고의 통상네트워크와 관련하여
윤광운,박명섭,김재승,손성문 국제무역학회 2002 국제무역연구 Vol.8 No.1
본 연구는 통상사적 측면과 무역상무론적 관점에서 9세기 동북아 해상교역환경과 장보고의 해상무역의 실체를 규명함으로써 오늘날 동북아지역간의 통상협력을 통한 발전방향을 모색하는데 그 목적이 있다. 이를 위해서 본 연구에서는 9세기 통일신라, 중국의 당나라 및 일본을 중심으로 한 동북아지역의 해상교역제도의 일반환경과 발전요소를 분석하고, 장보고 해상무역의 특성 및 교역관행 그리고 물적·인적 네트워크를 통한 동북아 통상네트워크 기반을 분석하고 있다. 특히 동북아지역 통상네트워크의 구축을 기반으로 하고 있는 장보고 해상교역의 특성으로 우선 지리적으로는 고대 동북아지역을 중심으로 한 통일신라의 청해진과 중국 당대의 산동성 법화원 그리고 일본의 하까다지점을 연결하는 해상교역네트워크를 구축한 점이고 둘째, 해상교역관행으로 주로 중계무역형태와 선불제도관행, 통상정책적 제반활동을 수행한 점과 셋째, 해상교역의 주요 수단으로 신라의 항해술과 당대의 발달된 조선술을 기초로 하고 있음을 알 수 있다. 이러한 점은 해상교역을 통하여 새로운 시장과 제품, 신사고라는 국제교역의 동기를 바탕으로 하여, 오늘날에도 여전히 국제무역의 주요 요인으로서 향후 동북아지역의 새로운 통상환경의 기반을 더욱 촉진할 필요가 있다. The purpose of this paper is to survey the ancient marine trade in Northeast Asian Area and present the directions for developing through the economical cooperations among Korea, China and Japan in Northeast Asian district. In order to achieve of above purposes, this paper investigated the environments of marine trade and the practices of Changbogo's marine trade focus on Silla, Tang in China and Japan in the 9th century. The features of Changbogo's marine trade are as follows: First, geographically, Changbogo constructed marine trade network linking in Silla, Tang, Japan, in the center of ancient Northeast Asian areas Second, Types of marine trade is largely today's intermediary trade Third, His marine trade depended on the technical improvement of navigation and shipbuilding. These things are also central factors of today's international trade and they are necessary to open up a new market through the marine trade.
민감도 분석을 이용한 겹치기 필릿용접의 용접변수 선정에 관한 연구
정재원,김일수,김학형,손성우,전광석 한국공작기계학회 2008 한국공작기계학회 추계학술대회논문집 Vol.2008 No.-
Arc welding process is one of the most important technologies to join metal plates. Robotic welding offers the reduced manufacturing cost sought, but its widespread use demands a means of sensing and correcting for inaccuracies in the part, the fixturing, and the robot. A number of problems that need to be addressed in robotic arc welding processes include sensing, joint tracking, and lack of adequate mathematical models for parameter prediction and quality control. Problems with parameter settings and quality control occur frequently in the GMA(Gas Metal Arc) welding process because of the large number of interactive parameters that must be set and accurately controlled. The objectives of this paper are to realize the mapping characteristics of bead width using a sensitivity analysis and multiple regression method, and finally select the most accurate model in order to control the weld quality(bead reinforcement area, bead penetration area) for lap joint fillet welding.
디-젤 批塵用 移動벨트型 電氣集塵裝置의 小型化에 관한 硏究
文在德,孫鉉,서보혁,金光錫 경북대학교 공과대학 1984 工大硏究誌 Vol.13 No.-
A Moving-Belt Type Electrostatic Precipitator (MBEP) proposed by one of authers has been improved by introducing systematic control concept for the diesel soot particulates from diesel engine exhaust. The proto type MBEP was designed without helping of any precharger or precoagulator of the soot particles, and so it is too large for equipping to the vehicles. The improved one is designed as a systematic control device consisted of a precharger and a MBEP. This systematization makes it possible miniaturizing the size of MBEP without any drop of its collection performance by enhancing the corona field intensity and current density in the collection space concurrently obtained by reducing the interelectrode spacing of corona electrode to collection electrode. As a result, the collection efficiency of present MBEP system, which is reduced by ca. 1/2 in volume to the proto type MBEP, amounts to 82% at the gas velocity of 1.0m/s (this nearly equals to the gas exhaust of a 2000 cc diesel powered vehicle) and gas temperature of ca. 50℃ for the simulated soot particles ranged in size from 0.005μm (mass median diam is 1.0 μm). The collection efficiency of the improved MBEP system of 82% is higher enough to the US EPA regulation limit of 70% of the year of 1985 for the diesel powered light-duty trucks and passenger cars.
백영흠,손광제 대구대학교 (한사대학) 산업기술연구소 1985 産業技術硏究 Vol.4 No.-
Confucian school remains in existence because it has been the base of Confucian scholars. There have been some studies of the architecture of Confucian school, but little data are left because those studies were focused on famous Confucian school. In this paper, 41 Confucian schools which were scattered in Kyung sang buk-do province were Studied and I want present some materials for the study of History of Architecture. The scope of study is limited on plot planning of space and the studies concerning planning and structure will be done on nest paper. The study was done for one month from August 3. 1984.
안전한 네크워크 환경을 위한 IP 역추적 시스템에 관한 연구
채철주,김재동,최병선,김지현,이재광 韓南大學校 2007 論文集 (인문·사회·자연과학·공학) Vol.37 No.-
컴퓨터 통신 네트워크의 급속한 발전은 사회 전반적인 부분에 많은 발전을 가지고 왔으나 이러한 통신 기술의 발전은 악의적인 목적을 가진 사용자들의 침입 증가라는 부작용을 초래하였다. 이로 인하여 좀 더 안전한 사이버 세상을 요구하는 많은 요구 사항들이 나타나고 있다. 이처럼 인터넷이 우리사회 전반의 지식 정보화 사회의 기반으로 발전하고 있는 반면, 정보통신망 역기능인 정보변조,해킹 등과 같은 불법적인 요소가 난무하는 장소로 변질되고 있는 것 또한 현실이다. 정보의 개방으로 인해 해킹 기술의 접근이 손쉬워진 현 상황에서 네트워크상에서 서비스를 제공하는 호스트들에 대한 보안 강화는 필수적인 요소로 대두되고 있다. 이러한 문제를 해결하기 위해서 본 논문에서는 능동적인 보안 시스템으로 IP 역추적 시스템을 제안하여 위와 같은 문제점들을 해결하고자 한다. There is a tremendous increase in the growth of Internet making people's life easy. The rapid growth in technology has caused misuse of the Internet such as cyber Crime. There are several vulnerabilities in current firewall and Intrusion Detection Systems (IDS) of the network computing resources. Automatic real time station chase techniques can track the Internet invader and reduce the probability of hacking. Due to the recent trends the station chase technique has become inevitable. In this paper, we design and implement lP traceback system using ICMP Traceback message. In this design there is no need to modify the router structure and we can deploy this technique in larger network. Our Implementation shows that ICMP Traceback system is safe to deploy and protect data in Internet from hackers and others.