로-르샤하 檢査의 刺戟價에 關한 硏究

염태호 서울大學校 大學院 1968 국내석사

항공 생환장구 산업의 경쟁력 강화 방안에 관한 연구

염태호 晋州産業大學校 2009 국내박사

Aline industry in Korea grew very fast and much in short period, starting from the technology to assemble an aircraft in 1970s and 1980s. Now Korea has a big aeronautical power because Korea is ranking in 20 among aeronautical manufacturing country and in 10 with possession and operation of aircraft. But for lack of fundamental technology, Korean manufacturing technology is behind Brazil or Canada. The problem of fundamental technology in airline industry has been taken up a problem for a long time and is being discussed in a thesis or a journal very often. However slowing down of required fundamental technology vs. growth of airline industry cause many problem over management of airline industry, especially in manufacturing aircraft. The whole quantity of important parts is being imported from overseas and the quantity of manufactured parts in domestic is extremely small quantity. So the parts should be replaced in the periods set by foreign company. In despite of selling aircraft manufactured in domestic to home market or overseas market, foreign-exchange is being spent a lot and profit created by sales is not sufficient. Because of this situation that such parts are dependent upon overseas, Especially, since maintenance costs of aero survival kit for a year is more expensive that price of aircraft, aero survival kit have a lots of effect on airline industry. In addition to, with the true that Korea is depending on importing from foreign companies for most of aero survival kit but a few items, there are many problem with managing airline because of delay on due date of delivered goods from overseas and a rise of price. Assume that Korea manufactures extremely outstanding aircraft no matter purpose of civil or military, but the aircraft would be useless if foreign companies don’t sell required parts. We have to be in too much hurry to strengthen our competitive power of aero survival kit industry so that we could manufacture aero survival kit by ourselves. And then, we cannot only make increase of air technology, decrease of expense foreign-exchange and maintenance cost of aircraft but also we can make easy to solve the problem of after service after exporting our aircraft. So our government should lead out encouraging and doing raise to build up competitive power of aero survival kit industry and then we can make airline industry future-oriented with practical effect not visible one by sales of aircraft.

베이스 스테이션의 버퍼 상태를 고려한 무선 TCP의 흐름 제어

염태호 아주대학교 전문대학원 2002 국내석사

인터넷의 발달과 더불어 TCP는 IP라는 신뢰성 없는 계층 프로토콜을 보완하는 유선환경 위주의 프로토콜이다. 인터넷은 속도의 증가와 무선화라는 두개의 방향으로 빠르게 성장하고 있다. 무선 환경은 유선환경과는 다르게 높은 에러로 재전송 시도가 빈번하게 발생한다. 그러므로 유선 위주로 개발되어온 TCP에 적합하지 못하다. Snoop, M-TCP, I-TCP등의 방법들이 이러한 문제점을 해결하기 위하여 연구되어 왔으며, 그 중 Snoop 알고리즘은 기존의 TCP알고리즘의 수정 없이 사용할 수 있는 장점을 가지고 있으나, 베이스 스테이션에 트래픽이 병목현상을 일으켜 버퍼의 오버플로우가 빈번하게 발생한다. 이러한 문제점을 해결하기 위해 버퍼의 사이즈를 감시하여 종단에서 트래픽을 전송하는 속도를 혼잡 원도우를 이용하여 조절함으로써 베이스 스테이션 버퍼의 오버플로우 횟수를 줄이는 방법을 제안한다. 시뮬레이션에서는 유선환경에서 사용되는 TCP Reno, 비교 대상 알고리즘인 Snoop, 그리고 버퍼가 제어된 Snoop의 세 가지 알고리즘을 서로 다른 BER환경에서 비교한다. 베이스 스테이션의 버퍼 크기와, 처리율, 버퍼에 대한 효율 등도 분석한다. 시뮬레이션 결과, 제안하는 알고리즘이 버퍼의 사이즈를 이동 평균값으로 감시하여, 전송 노드가 많은 경우 트래픽의 병목 현상을 제어하고, 버퍼의 오버플로우를 방지함으로써 패킷의 처리율과 버퍼의 이용도가 증가된다. TCP(Transmission Control Protocol) is the reliable 4th layer protocol combined with IP, the unreliable 3rd layer protocol, in internet environments. Also, TCP was designed for wired networks, which has a low error rate in transmission. The internet has been developed in two ways concerned with wireless application and high speed. In general, wireless networks have higher error rates than wired networks. Therefore, retransmissions are frequently happened in wireless networks. Snoop, M-TCP, and I-TCP have been studied to solve these problems. The Snoop algorithm has advantage that doesn't need to change previous TCP systems while the other algorithms do. However, Snoop has frequent buffer overflows in a base station. To solve this problem, this paper proposes an algorithm that reduces the number of buffer overflow in a base station as checking the buffer size for controlling the congestion window size. In simulation, TCP Reno and Snoop are compared with the proposed algorithm by buffer size in a base station, throughput, and buffer utilization. As results of the simulation, the proposed algorithm has improved throughput and buffer utilization as controlling the buffer size in a base station by the EWMA (Exponential Weighted Moving Average) algorithm in networks with many traffic nodes.

DNA polymerase I : Two distinct enzymes in one polypeptide chain

염태호 서강대학교 대학원 2013 국내석사

I studied structural function of DNA polymerase I. DNA polymerase I is composed of polymerase domain including proof-reading function, and 5'nuclease domain. Although the polymerase domain known as Klenow fragment shares common features with other polymerases, 5'nuclease domain is unique to eubacterial polymerase I family. In 1972, Setlow and Kornberg raised a question of why two distinct enzymes of polymerase and 5'nuclease are merged in one polypeptide. However, they could not find any difference between the mixture of two separated fragments and the intact whole DNA polymerase I. In 1995, Kim et. al. reported crystal structure of thermus aquaticus DNA polymerase including 5'nuclease domain, which is a member of polymerase I family. However, their structural analysis could not explain the cooperation of two domains. In 2000, Xu et. al. revisited this problem with advanced molecular biology. Unfortunately, they reached the same conclusion Setlow and Kornberg had arrived in 1972. Here we present an answer to this long-standing question by single molecule observation and mass spectrometric analysis. Single molecule DNA analysis shows that unleashed 5'nucleases cause severe DNA breaks more than whole DNA polymerase I. Furthermore, we present additional molecular reason by using mass spectrometric assay that unleashed 5'nuclease not only increases the life-time of single-stranded states, but also reduces polymerase processivity due to widened gaps, which raises the probability of DNA breaks. 문헌조사를 통해 DNA Polymerase I 을 이용한 실험이 Enzyme 특성상 문제가 있을 수 있음을 인식하고 DNA Polymerase I 에서 하나의 Polypeptide Chain으로 연결된 Polymerase domain과 5'Nuclease domain을 따로 얻어서 DNA에 처리하고 MALDI TOF MS로 분석하였다. DNA Structure에 따라 Polymerase에 의한 dNTP의 incorporation 능력이 달라지는 것을 확인하고 Single Molecule DNA analysis를 통해서 두 domain이 붙어있는 것이 대장균 세포 입장에서 생존에 치명적인 DNA 손상을 감소시키는 결과를 불러온다는 실험적 근거를 제시하였다.

강탄성체 BiVO₄: Mn² 의 상자성 공명과 강탄성 구역구조

염태호 高麗大學校 1992 국내박사

학업성실도가 회계관련 자격취득에 미치는 영향

염태호 광주대학교 대학원 2017 국내석사

Effects of pressure on 14N NQR in ferroelectric NaNO2 powder

염태호 高麗大學校 1985 국내석사

大腦損傷과 認知障碍의 關係

염태호 高麗大學校 1987 국내박사

2중 대역 고이득 저잡음 증폭기

염태호 동국대학교 2013 국내석사

In this paper, the multi-band LNA that receives both LTE standard (2.1 GHz) and Wi-Fi standard (2.4 GHz) is proposed. In the proposed circuit, two-stage architecture is employed for high gain and switchable capacitor bank is used at the output stage for multiband applications. The circuit has two inputs wich are controlled by separate DC control voltages. Impedance matching is set at the desired frequencies in the input stage. The first-stage is composed of cascode LNA topology. The second-stage is composed of common-source LNA to maintain low NF. For frequency determination a MOSFET switch selects appropriate capacitance. All inputs and the output is matched at 50Ω. The LNA is fabricated using Dongbu 0.11 um RFCMOS process. Post-layout simulation showed input and output matching less than -20dB, gain above 25 dB and NF below 3dB. LNA consumes 18 mW from 1.2 V supply. The die size is ??????.