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RISS 인기검색어
- 검색키워드
- 저자 : 장호근 (검색결과 19 건)
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장호근 三陟大學校 産業大學院 2005 국내석사
본 연구는 최근 하천 오염이 진행되고 있는 삼척오십천 유역을 대상으로 장래 수질을 예측함과 아울러 지리정보 시스템을 이용하여 오염도를 공간적으로 예시하고자 하였으며 본 연구를 통하여 얻어진 결과를 요약하면 다음과 같다. 1) 삼척 오십천 유역의 장래 수질예측은 BOD와 DO를 대상으로 하였으며 갈수기, 평수기, 그리고 풍수기로 나누어 수행하였다. 오십천의 12년후 BOD는 갈수기, 평수기, 그리고 풍수기일 때 각각 5등급 3등급 그리고 2등급으로 나타났으며 DO는 풍수기, 평수기, 갈수기 때 각각 1등급의 수질의 변화를 보였다. 2) 삼척 오십천의 공간적인 오염현상을 분석하기 위하여 GIS를 구축하여 오염발생 현황, 오염배출분포 및 하천지점별 수질상태 등을 시각화하였으며 이는 향후 구역별로 오염발생원을 분석하는데 유익하게 활용될 것으로 기대한다. 3) 오십천의 수질예측 결과 지속적으로 수질이 저하되는 경향이 있으므로 목표수질인 1등급의 수질을 확보하기 위해서는 본 공간적인 오염분포도를 통하여 구간별로 적절한 삭감대책을 수립할 수 있을 것으로 기대한다. The objective of this study is to forecast the water quality of Oship-river basin in the samcheok city by using GIS and the water quality model, QUAL2E. 1. Concentrations of BOD nd DO were measured and were used for the future classification(2016) of the river system into three parts; low water level(LWL), mean water level(MWL) and high water level(HWL). When water levels in the Oship-river is low, mean and high conditions, classifications of BOD were Ⅴ, Ⅲ and Ⅱ respectively. classification of DO in the Oship-river was Ⅰ. 2. On the basis of estimation on the reach, the water quality becomes polluted in the lower part of the reach but recovered up to the water quality standard due to river purification. 3. Water quality modeling such as QUAL2E and GIS system were suitable for management of the regional river and for reduction of point source contamination.
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예방외교의 조기경보 실패와 성공사례에 관한 연구 : 한국전쟁과 제1차 북한 핵위기를 중심으로
The purpose of this research is to provide policy implications to prevent a tragedy like the Korean War and to maintain stable peace on the Korean peninsula. For this purpose, this case has analyzed the Korean War in 1950 and the First North Korean Nuclear Crisis in 1993-1994 from the perspectives of the preventive diplomacy. Preventive diplomacy has gained attention after the Cold War as a new approach to resolve conflicts around the world. According to the United Nations report, Agenda for Peace(1992), preventive diplomacy seeks to prevent disputes themselves from arising between parties, and manage disputes in order not to be escalated into a full-fledged conflict. Since such approach can prevent human and material costs of enormous scale that are caused by possible armed conflicts, it is actively being implemented in potential conflict zones by the U.S., other major powers, and international organizations. In the light of rising interest in this rather new concept, this research seeks to analyze the success and failure of preventive diplomacy on the Korean Peninsula using two cases mentioned above. It carries out a comparative analysis between these two crisis, using three variables often used in preventive diplomacy: early warning, strategies of response, and actors. Even though the topic of this study is the national security of two Koreas, it also focuses on the U.S. policy toward the Korean Peninsula. This study argues that one of the causes of the Korean War is attributed to the lack of policymakers’receptivity to the early warning, under the situation of no imminent war warning and failure of the proper response due to psychological misjudgment. Thus, the case of the Korean War is analyzed to be an opportunity missed in preventive diplomacy on the Korean Peninsula. On the other hand, the handling of the First North Korean Nuclear Crisis in 1993-1994 was a success case because it prevented the crisis from escalating into a violent conflict by signing the Agreed Framework, even if the agreement was an incomplete measure only to halt the North Korean nuclear program for a time being. In other words, the crisis was carried over by freezing the North Korean nuclear program in accordance with an effective early warning system of the U.S. and its consistent strategy of response. At this point, we may recall the discussion that, though a full-scale conflict resolution is not achieved, it could be claimed as an opportunity seized since a possible escalation to mass violence and deadly conflict is prevented. So, in the case of the Korean Peninsular, it could be said as an opportunity seized. Additionally, from analyzing two cases, several key issues in preventive diplomacy were identified as follows. First, no such global entity exists that is capable of monitoring politically generated catastrophes. Second, as for the lack of political will, a crisis that has not yet erupted is generating neither the pressure nor the eventual rewards. Third, as for the sovereignty dilemma, preventive diplomacy would not happen without international cooperation or intervention to avoid the outbreak of an intra-state crisis. Fourth, meanwhile traditional diplomacy is a quiet and silent diplomacy, preventive diplomacy can never be silent and it targets the roots of conflict. So it may include a potential root of conflict. Fifth, as for the problem in the bureaucracy block, unblocking bureaucratic obstinacy and rivalry is one of the major challenge with which preventive diplomacy and its early warning instruments have to cope. In the institutional point of view, the lessons from the opportunity missed and seized on the Korean peninsula reveals the necessity of an effective and imminent early warning system that could mobilize political will for the early response. Also, considering the fact that the First North Korean Nuclear Crisis was seized through international cooperation, establishing a multilateral regime could be considered in the Northeast Asia region in order to maintain a durable peace on the Korean Peninsula. The basic instrument for such end could be a regional early warning system. Thus, this study suggests to establish an integrated early warning system in the Northeast Asia under the close cooperation among South Korea, the U.S. and Japan for information collection and sharing.
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Recently, the importance of efficient energy utilization has grown to meet tightening regulation standards for vehicle emissions. In accordance with this trend, various systems are being developed in the automobile industry, and an air dam for vehicles is one of them. However, the air dam connected below the front bumper of the vehicle is easily damaged due to collisions with obstructions on the road. Therefore, further studies on preventing damage of the air dam are needed. In this paper, two new mechanisms to prevent damage of air dam are suggested: a passive mechanism using only mechanical components and another mechanism using air pressure. The first mechanism maintains its shape during normal driving. When an external force larger than a preset value is exerted on the mechanism, the mechanism rotates to prevent damage. Once the external force is removed, a spring inside the mechanism recovers the air dam back to its original position. The second mechanism uses air pressure to prevent the air dam from damaging. In normal driving mode, pressure is built inside a bellows included in this mechanism and this bellows supports the air dam. A flap connected to the bellows prevents the actual damage. When an external force larger than the preset value is exerted on the air dam, the flap opens, releasing the air caught inside the bellows. The bellows soon shrinks causing the air dam to rotate, thus preventing damage. In this paper, computational simulations were conducted to test and evaluate the developed mechanisms. The mechanisms were tested on developed simulation models and methods. With these simulations, design specifications of the mechanisms were determined and tested before building a prototype.
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PHY Chip을 이용한 RS232C 데이터 전송장치에 대한 연구
본 연구에서는 PHY Chip과 RS232C chip을 기반으로 Serial to Ethernet을 구현하는 것을 목적으로 한다. 기존 산업현장에서 많이 쓰이는 RS232C 통신의 문제점은 크게 2가지로 볼 수 있다. 첫 번째는 RS232C의 거리적 제약으로 인해 15m 미만의 근거리 통신만 가능함에 따라 장비간의 물리적 설치거리의 한계성이 생긴다. 두 번째는 잡음에 대한 통신의 오류문제이다. RS232C 통신 단점을 해결하기 위하여 광케이블을 이용하여 RS232C 데이터를 전송하는 방법이 개발되었으며, MCU의 USART 포트를 통하여 들어온 데이터를 TCP/IP를 통하여 전송하는 방식으로 동작한다. 이 방식의 경우 양단의 Serial to Ethernet 장비가 한 쌍을 항상 이루어야 하며, USART통신 설정 및 TCP/IP를 위한 Network 설정에 대한 선행 지식이 없을 경우 사용하기 어렵다는 단점이 존재한다. 이러한 단점을 해결하기 위하여, 본 연구에서는 PHY 칩과 RS232 Chip을 직접 연결하는 방식을 구현하고자 한다. 이를 위하여 RS232 Chip의 TX/RX핀을 PHY칩의 TXD/RXD에 직접 연결하고, MAC의 연결 없이 PHY칩 단독으로 데이터 전송을 위하여 PHY 칩의 레지스터 및 신호선을 외부 마이크로컨트롤러를 통하여 직접 제어하고자 한다. PHY 칩과 RS232 Chip을 직접 연결함으로서 장치의 구조가 단순해지며, 시리얼 설정 없이도 바로 사용할 수 있게 된다. 본 연구에서는 장비를 직접 구현하고, 테스트함으로써 제안하는 방법의 효율성을 직접 증명한다.
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락토페린은 우선 미생물의 감염에 대한 일차적인 방어기작을 수행하며, 다른 면역조절 반응에서 세포신호전달에 관여하고 있다. 그리고, myeolpoiesis 의 조절과 같은 단백질의 다른 잠재적인 기능에도 영향을 미치고있다. 또한 lactoferrin 은 세포의 핵으로 들어가 DNA 와 결합하여서 성장인자로서의 역할도 수행하는 것으로 알려져 있다. 우리는 lactoferrin 의 분자생물학적 기작을 이해하기 위하여 K562 세포내에서 락토페린을 과발현시켰으며, 유전자칩을 이용하여 락토페린에 의해 발현의 차이가 있는 유전자에 대해서 살펴보았다. 과발현된 락토페린에 의해서 높게 발현되는 유전자 중의 하나로, I_(k)B 계열에 속하는 Bcl-3 가 발견되었는데, Bcl-3 는 발암성 유전자로서 t(14;19) 부위에서 전좌에 의해 발생되어지는 인간 B-세포 만성 림프암에서 높게 발현되고 있으며, 또한 B-세포의 증식과 생존을 촉진시킨다. 우리는 Northern blot 분석을 통하여 락토페린이 발현되어지는 K562 세포에서 Bcl-3 mRNA 가 높게 발현되는 것을 확인하였다. 락토페린 단백질을 배양액에 직접 첨가하였을 때, Bcl-3 mRNA 는 락토페린의 농도가 50 ㎍/ml 일 때, 그리고 락토페린을 처리한 뒤 2 시간 후에 높게 발현되는 것을 확인하였다. 이상의 연구 결과는 락토페린이 Bcl-3 의 발현을 유도함으로써 B 세포의 증식과 생존을 촉진시킬 것이라 사료된다. Lactoferrin (LF) plays pivotal roles in primary defense against microbial infection and other cellular processing including immuno-modulation. Other potential functions of the protein such as regulation of myeolpoiesis and acting as a growth factor have been suggested. To understand the molecular mechanism of LF action, we over-expressed LF in the K562 cells and examined the differential gene expression profile from the cDNA microarray data. One of the genes that were highly up-regulated by LF was an I_(k)B family member, Bcl-3, a candidate proto-oncogene. Bcl-3 is known to be up-regulated in some cases of human B-cell chronic lymphocytic leukemia and promotes B cell proliferation and survival. Northern blot analysis confirmed that the Bcl-3 mRNA level was highly increased in cells transfected with the LF expression vector. When LF protein was directly added into the culture media, it induced Bcl-3 mRNA and the expression reached peak at 50 ㎍/ml and 2 hr after LF treatment. These results suggest that LF induces Bcl-3 and thereby promotes B cell proliferation and survival.
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NEIS(교육행정정보시스템)을 통한 교육행정의 BPR 방안모색
장호근 연세대학교 정경대학원 2005 국내석사
The National wide Education Information System under the new democratic Government has been driven to support the changes of the 21st century with a new government Management paradigm. It is designed to secure National competitive power, as one of the 11 major assignments headed for an electronic Government.This NEIS system has been criticized by the laborer''s member organizations in school(Jeon-gyo-jo) and other similar Associations from the period of constructing the NEIS to it''s implementation.Therefore, this thesis is trying to ascertain what the NEIS is, and the procedure contents of how the NEIS was investigated for construction. With the results of the study on the Educational Administration by the Business Process Reengineering view through NEIS.The contents of the Educational Administration affair''s analysis, the merits and demerits, as well as the before and after effects in introduction of it were comparatively investigated, and they observed the specialties of the NEIS under ERP and the CRM atmosphere with looking ahead to the coming future of the NEIS and the development task for it. 전국단위 교육행정정보시스템(NEIS)은 국민의 정부 당시 21세기 새로운 국가운영패러다임의 변화를 뒷받침하고 국가경쟁력 확보를 위해 범정부적으로 추진하는 전자정부 구현 11대 중점추진과제로서 추진되었다. 구축과정부터 시행과정까지 전교조등의 단체로부터 논란의 대상이 되어왔다. 따라서 본 연구는 NEIS란 무엇인지 알아보며, 구축단계의 추진내용을 살펴보며, NEIS를 통한 교육행정의 BPR(Business Process Reengineering)적 연구를 통하여, 교육행정의 업무분석 내용, 도입 장․단점, 도입 전․후등을 비교 분석하고, NEIS의 향후 과제와 발전과제를 살펴보며 나아가 NEIS의 ERP, CRM적 성격을 고찰하였다.
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