Regime changes in uncertainty channel between inflation and output growth

정상국 한양대학교 경제연구소 2020 JOURNAL OF ECONOMIC RESEARCH Vol.25 No.2

In order to investigate the presence of regime changes in the effects of real and nominal uncertainty on inflation and output growth, bivariate normal mixture GARCH-in-mean models are developed for monthly data of inflation and output growth in USA. Overall, we find significant evidence in favor of and against four hypotheses depending on regimes. The key idea in this paper is that the model embeds two different regimes of a usual volatility, which occurs most of the time, and an extreme volatility, which occurs rarely.

Laser-Powder bed fusion 방식으로 제조된 인코넬 718의 크립 특성

정상국,강석훈,천주홍,유상훈,김형섭 한국소성가공학회 2022 한국소성가공학회 학술대회 논문집 Vol.2022 No.5

이중 문턱값 설정에 의한 ATM망의 트래픽 제어기법

정상국,진용옥 한국통신학회 1994 韓國通信學會論文誌 Vol.19 No.8

본 논문은 2중 문턱값을 갖는 우선순위 스케쥴링 알고리즘과 버퍼의 히스테리시스 특성을 이용한 트레픽 제어기법을 제안하였다. 2중 문턱값을 갖는 우선순위 스케쥴링 알고리즘은 HOL과 QLT를 적용하였다. 버퍼의 히스테리시스 특성을 이용한 트래픽 제어기법으로는 히스테리시스성 QLT 알고리즘과 히스테리시스성 트래픽 유입제어를 제시하였다. 2중 문턱값을 갖는 동적 우선순위 스케쥴링 알고리즘이 기존의 QLT 알고리즘보다, 셀손실율과 평균지연에 있어서, 우수함을 컴퓨터 시뮬레이션을 통해 고찰하였다. 또 히스테리시스성 QTL 알고리즘과 트래픽 유입량 제어기법은 단일 문턱값을 이용한 방식보다 각각 효율이 개선됨을 알 수 있었다. In this paper, a priority scheduling algorithm with double threshold and a traffic control mechanism with hysteresis effect are proposed. The double threshold priority scheduling is studied based on HOL and QLT. The hysteresis effect traffic control is specified by hysteresis effect QLT and traffic rate control. According to the simulation results, it can be shown that the proposed dynamic priority scheduling brings better processing performance than the existing QLT algorithm. And the results demonstrate that QLT and traffic rate control with hysteresis effect enhance the performance in comparison with those of single threshold.

ATM망에서 다중등급 통화유량 처리를 위한 동적 우선순위 스케쥴링에 관한 연구

정상국,진용옥 한국통신학회 1993 韓國通信學會論文誌 Vol.18 No.2

본 논문은 다중등급의 통화유량에 대해 효율적인 처리를 위하여 동적 우선순위 스케쥴링이 가능한 2중이완성 한계치를 갖는 최소이완성한계 (Minimum Laxity Threshold:MLT)알고리즘과 2중 대기행열 한계치를 갖는 대기 행열간격한계(Queue Length Threshold QLT) 알고리즘을 제안하였다. 그리고 제안한 알고리즘의 성능을 컴퓨터 시뮬레이션을 통하여 분석하였다. 시뮬레이션 결과, 실시간서비스 중 지연민감도가 다른 2개 등급 이상의 통화유량 처리시2중 이완성 한계치를 갖는 MLT알고리즘을 적용함으로써 MLT알고리즘 자체보다 처리 효율성이 개선됨을 확인하고, 또2개 등급 이상의 비실시간 통화유량에 대해서는 2중 대기행열 한계치를 갖는 QLT알고리즘이 QLT보다 우수함을 알 수 있었다. In this paper, double laxity threshold MLT(Minimum Laxity Threshold) algorithm and double queue threshold QLT(Queue Length Threshold) algorithm are proposed as DPS(Dynamic Priority Scheduling) techniques for advanced processing of multiple class traffics. Also, the performance of the proposed algorithms is analyzed by a computer simulation. According to the simulation results, it can be shown that the proposed double laxity threshold ML T algorithm advances the processing performance versus ML T algorithm for 2 or more classes delay sensitive traffics, and that double queue length threshold QL T algorithm provides more efficient performance than QL T for 2 or more classes of non real time traffics.

일반산업단지의 분양률 제고를 위한 정책 연구: 순천 해룡일반산업단지를 중심으로

정상국,신민식 대한정치학회 2015 大韓政治學會報 Vol.23 No.2

This study was looking for ways to find out about the pre-sale properties and sale rate Industrial Complex that supplies the composition in a non-national civil improve sale rate. Measures to improve the sale rate for industrial parks around the practice area first, and got such accessibility and proximity to other affiliated companies and associated facilities represent an important factor in location decisions should be sought apart from the surrounding industrial park. Second, it is determined to be advantageous to focus on the steel and heavy chemical industry for the relevance of the target area. Third, it should be leveraged financing and financial resources of the municipality. Fourth, since it is not a low pre-sale price is represented by high sale rate shall conform to the area and set up a move possible prices. Fifth, the only industrial estate development feasibility analysis based on the objective to raise issues that are directly related to productivity, according to the composition of the target area, it is important castle pre-sale. Sixth, the industry just in case you are in a large sale rate this material is relatively high, so it should be strongly attracted. 본 연구는 국가가 아닌 민간에서 조성하여 공급하는 일반산업단지의 분양성 및 분양률에 관하여 알아보고 분양률을 제고할 수 있는 방안을 모색하였다. 사례지역을 중심으로 산업단지의 분양률 제고를 위한 방안으로는 첫째, 관련 시설과의 접근성과 관련 기업과의 인접성 등이 입지결정에 중요한 요인으로 나타났고 주변 산업단지와의 차별화를 모색하여야 한다. 둘째, 대상지역의 관련성을 위하여 철강 및 중화학 업종에 집중하는 유리할 것으로 판단된다. 셋째, 해당 지방자치단체의 금융지원 및 재원을 적극 활용하여야 할 것이다. 넷째, 낮은 분양가격이 높은 분양률로 나타나는 것이 아니므로 지역에 적합하고 입주 가능한 가격 수준을 설정하여야 한다. 다섯째, 분양성은 대상지역의 단지 조성에 따른 생산성 제고와 직결되는 문제로 객관적인 타당성 분석에 기초한 산업단지 개발이 중요하다. 여섯째, 산업단지 내의 대기업이 소재하고 있는 경우 분양률이 상대적으로 높으므로 적극 유치하여야 할 것이다.

위안화 실효환율변동이 한·중 무역에 미치는 영향

정상국,김성기 한국무역통상학회 2011 무역통상학회지 Vol.11 No.1

ATM망의 히스테리시스 특성을 이용한 흐름제어기법

정상국,진용옥 대한전자공학회 1994 전자공학회논문지-A Vol.31 No.9

In this paper, a priority schedling and a flow control algorithm with hysteresis effect are proposed for high-speed networks. A mathematical model for the flow control is proposed and a cell transition probability from this model is found. And the performance of the proposed algorithm is analyzed by a computer simulation. According to the simulation results, it can be shown that the priority scheduling and the flow control with hysteresis effect get the cell loss probability 0.061 better and the average delay 100ms better and the average delay 100ms beter than those of single threshold.

전기습윤 현상에서의 선장력과 전기 이중층의 영향에 대한 해석

정상국,강관형,이정묵,강인석,Chung, Sang-Kug,Kang, Kwan-Hyoung,Lee, Choung-Mook,Kang, In-Seok 대한기계학회 2003 大韓機械學會論文集B Vol.27 No.7

The Lippmann-Young equation has been widely used in electrowetting to predict the contact-angle change of a droplet on a insulating substrate with respect to the externally-applied electrical voltage. The Lippmann-Young equation is derived by assuming a droplet as a perfect conductor, so that the effect of the electrical double layer and the line tension are not taken into account. The validity of the assumption has never been checked before, systematically. In the present investigation, a modified Lippmann-Young equation is derived taking into account of the effect of the electrical double layer and the line tension. To assess their influence on contact-angle change in electrowetting, the electrostatic field around the three-phase contact line is analyzed by solving the Poisson-Boltzmann equation numerically. The validity of the numerical methods is verified by using the past theoretical results on the electrostatic field around a wedge-shaped geometry, which shows fairly good agreement. The results of the present investigation clearly indicate that the effect of the electrical double layer and the line tension is negligible for a millimeter-sized droplet. On the other hand, for a micron-sized droplet, the effect of the line tension can become a dominating factor which controls the contact-angle change in electrowetting.

ATM 망용 우선순위제어 알고리즘의 개선에 관한 연구

정상국,진용옥 대한전자공학회 1994 전자공학회논문지-A Vol.31 No.2

This paper proposes Double queue threshold QLT(Queue Length Threshold) algorithm and Hysteresis effect QLT algorithm. as being DPS(Dynamic Priority Scheduling) techniques. in order to advance the processing of multiple class traffics. Also, the performance of the proposed algorithms is analyzed through computer simulations,and the priority scheduling is analyzed using a retrial queue with two types of calls. Our simulation results show that the performance of the proposed Double queue length threshold QLT algorithm is superior to that of the conventinal QLT algorithm for 2 or more classes delay sensitive traffics. Also we find that Hysteresis effecT QLT algorithm is better mechanism than that of the existing QLT for real time and non-real time traffics.

새만금 준설모래의 비배수 거동

정상국,강권수,양재혁 한국구조물진단유지관리공학회 2002 한국구조물진단유지관리공학회 논문집 Vol.6 No.1

The results of an experimental study on Saemangeum dredged sands are presented. Undrained triaxial compression tests were performed with three different initial relative densities, namely 18, 34, and 50%, intend to evaluate undrained behavior. All undrained triaxial compression tests were performed under static loading conditions. Undrained triaxial compression tests were exhibited complete static liquefaction, zero effective confining pressure and zero stress difference at lower confining pressures. As confining pressures were increased, the effective stress paths indicated increasing resistance to static liquefaction by showing increasing dilatant tendencies. The isotropic consolidation before shearing was identified as the likely cause of this behavior. The fines and larger particles create a particle structure with high compressibility at lower confining pressures. The effect of increasing the relative density was to increase the resistance of the sand against static liquefaction by making the sand more dilatant.