mSQL을 이용한 데이터베이스 구현

고성현,조준익 群山大學校 情報通信技術硏究所 1999 情報通信技術硏究論文集 Vol.3 No.-

These days, Internet is a fantastic business in the world, We realized a sample Database using mSQL which is freeware in the academy. In realization, we tested a sample program in the Web browser. Also HTML is acted well in the Web browser. The Web programming which tested in this paper was very simple and easy. We tested a datagram to upload, modify, and delete in the Web browser.

철근콘크리트 원형 교각의 전단성능에 대한 횡방향철근의 영향

고성현,Ko, Seong Hyun 한국지진공학회 2021 한국지진공학회논문집 Vol.25 No.5

In seismic design, hollow section concrete columns offer advantages by reducing the weight and seismic mass compared to concrete section RC bridge columns. However, the flexure-shear behavior and spirals strain of hollow section concrete columns are not well-understood. Octagonal RC bridge columns of a small-scale model were tested under cyclic lateral load with constant axial load. The volumetric ratio of the transverse spiral hoop of all specimens is 0.00206. The test results showed that the structural performance of the hollow specimen, such as the initial crack pattern, initial stiffness, and diagonal crack pattern, was comparable to that of the solid specimen. However, the lateral strength and ultimate displacement of the hollow specimen noticeably decreased after the drift ratio of 3%. The columns showed flexure-shear failure at the final stage. Analytical and experimental investigations are presented in this study to understand a correlation confinement steel ratio with neutral axis and a correlation between the strain of spirals and the shear resistance capacity of steel in hollow and solid section concrete columns. Furthermore, shear strength components (V_c, V_s·, V_p) and concrete stress were investigated.

스포츠현장 : Welcome to the Hell!

고성현 한국스포츠정책과학원(구 한국스포츠개발원) 2012 스포츠과학 Vol.120 No.-

BRQ수준과 점포유형이 서비스실패에 대한 소비자 반응에 미치는 영향

고성현,여준상,김영조 한국전략마케팅학회 2006 마케팅논집 Vol.14 No.4

본 연구는 소비자가 서비스실패를 경험했을 때 나타나는 소비자 반응(불만족 지각, 불만족 표현/구전 의사, 안정성 귀인, 추천/재방문 의사)에 BRQ수준과 점포유형이 어떠한 영향을 미치는지 살펴보았다. BRQ가 높은 집단의 경우, 서비스실패에 대한 불만족 지각과 표현/구전 의사는 BRQ가 낮은 집단과 동일한 수준에서 나타나지만, 안정성귀인 성향(그러한 실패가 계속 일어날 것이라는 생각)은 상대적으로 낮게 나타나며, 이로 인해 추천/재방문의사가 BRQ가 낮은 집단에 비해 높게 나타났다. 'BRQ 수준(고/저) X 점포 유형(프랜차이즈/non프랜차이즈)' 집단간 디자인에 대한 ANOVA 분석결과, 불만족 지각은 아무런 효과가 없으며, 불만족 표현/구전의사는 점포유형의 주효과가 나타났으며, 안정성귀인과 추천/재방문의사는 BRQ수준의 주효과가 나타났다. 이를 구체적으로 보면, 서비스실패 경험시 불만족 지각은 집단에 관계없이 비슷하게 나타났으나, 안정성귀인은 BRQ가 높은 집단에서 낮게 나타났으며 이로 인해 추천/재방문 의사는 BRQ가 높은 집단에서 상대적으로 높게 나타났다. The purpose of this research is to investigate the influences of BRQ level and type of store on consumer reactions(e.g., dissatisfaction perception, complaint expression, word-of-mouth intention, stability attribution, recommendation & revisit intention) when consumers experience service failures at beauty salon. High BRQ group showed the same dissatisfaction perception, complaint expression, and word-of-mouth intention as low BRQ group, However, they showed lower stability attribution than low BRQ group, thereby higher recommendation and revisit intention appeared than low BRQ group. 2(type of store: franchise/non franchise)x2(BRQ level: high/low) between subjects ANOVA demonstrated no effect on dissatisfaction perception, main effect of store type on complaint expression and word-of-mouth intention, and main effect of BRQ level on stability attribution, recommendation intention, and revisit intention. Specifically, dissatisfaction perception appeared similar regardless of experimental groups, but complaint expression and word-of-mouth intention appeared higher in the condition of service failures from franchise beauty salon. The level of stability attribution appeared lower in high BRQ group, thereby recommendation intention and revisit intention appeared higher in high BRQ group

지진하중을 받는 철근콘크리트 기둥의 저주파 피로

고성현 대한토목학회 2007 대한토목학회 학술발표회 논문집 Vol.2007 No.1

The purposes of this study are to verify a reasonable model of material characteristic and to propose a rational model of reinforcement characteristic considering monotonic and cyclic loading about manufactured reinforcing steel in Korea. Also, application methodology was proposed model of material unit to reinforced concrete column. In order to evaluate material characteristic of low cycle fatigue for the longitudinal reinforcement, experimental study were performed for low cycle fatigue behavior. The modified low cycle fatigue model was proposed based on experimental study for manufactured reinforcing steel in Korea. The modified monotonic tension model was proposed based on Mander et al. model, and the modified monotonic compression model was proposed based on Maekawa et al. model. In order to verify proposed models of material unit, non-linear analysis program (YNU-RCCOL) was developed, which is applicable to the reinforced concrete columns subjected to seismic loading. The analytical results were predicted identical failure mode to test results with surprising degree of accuracy.

Effectivenss of Serum ELF levels on Diagnosing Liver Cirrhosis in Patients with Chronic Hepatitis B

고성현,박현준 대한내과학회 2023 대한내과학회 추계학술대회 Vol.2023 No.2

원형 RC 기둥의 내진성능과 휨 초과강도

고성현 한국구조물진단유지관리공학회 2013 한국구조물진단유지관리공학회 논문집 Vol.17 No.5

Eight small scale circular reinforced concrete columns were tested under cyclic lateral load with constant axial load. Test specimens were designed with 4.5 aspect ratio. The selected test variables are longitudinal steel ratio, transverse steel ratio, yielding strength of longitudinal steel and axial load ratio. The test results of columns with different longitudinal steel ratio, transverse steel ratio and axial load ratio showed different seismic performance such as equivalent damping ratio, residual displacement and effective stiffness. It was found that the column with low strength of longitudinal steel showed significantly reduced seismic performance, especially for equivalent damping ratio and residual displacement. The regulation of flexural over-strength is adopted by Korea Bridge Design Specifications (Limited state design, 2012). The test results are compared with nominal strength, result of nonlinear moment-curvature analysis and the design specifications such as AASHTO LRFD and Korea Bridge Design Specifications (Limited state design).

나선철근으로 횡구속된 정사각형 RC 기둥의 내진성능

고성현 한국구조물진단유지관리공학회 2012 한국구조물진단유지관리공학회 논문집 Vol.16 No.5

본 연구에서는 비내진 교각의 내진성능과 휨-전단 거동을 파악하고자 형상비 4.5인 정사각형의 중실 및 중공단면 철근콘크리트 교각실험체를 제작하여 일정한 축력하에서 변위비 등급을 증가시켜 가면서 횡하중을 가력하는 실험을 수행하였다. 본 연구는 철근콘크리트 교각의 한정연성 내진설계를 위한 실험적 기초자료의 제공과 함께 성능단계별 교각성능 및 손상평가를 위한 정량적 수치와 경향을 제공하기 위한 것이며, 파괴거동, 극한변위, 극한드리프트비율, 변위연성도, 응답수정계수, 등가점성감쇠비, 잔류변형지수, 유효강성, 철근 변형률 등의 주요 내진성능 인자들에 대한 분석결과와 비선형 해석 결과를 나타내었다. The objective of this research is to investigate the seismic performance and flexure-shear behavior of square reinforced concrete bridge piers with solid and hollow cross section. Test specimens were nonseismically designed with the aspect ratio 4.5 Two reinforced concrete columns were tested under constant axial load while subjected to lateral load reversals with increasing drift levels. Longitudinal steel ratio was 2.217 percent. The transverse reinforcement ratio As/(s·h), corresponding to 58 percent of the minimum lateral reinforcement required by Korean Bridge Design Specifications for seismic detailing, which represent existing columns not designed by the current seismic design specifications or designed by limited ductility concept. This study are to provide quantitative reference data for the limited ductility design concept and tendency for performance or damage assessment based on the performance levels such as cracking, yielding, collapse, etc. Failure behavior, ultimate displacement/drift ratio, displacement ductility, response modification factor, equivalent viscous damping ratio, residual deformation, effective stiffness, plastic hinge length, strain of reinforcements and nonlinear analysis are investigated and discussed in this paper.

북한의 한국기독교사(조선후기~일제시대) 이해에 대한 연구

고성현 한국기독교역사연구소 1999 한국기독교와 역사 Vol.10 No.-

버퍼의 문턱치값을 이용한 DQDB망의 공평성 개선 및 혼잡 제어에 관한 연구

고성현,조진교 한국통신학회 1997 韓國通信學會論文誌 Vol.22 No.4

DQDB(Distributed Queue Dual Bus) protocol, the IEEE 802.6 standard protocol for metropolitan area networks, does not fully take advantage of the capabilities of dual bus architecture. Although fairness in bandwidth distribution among nodes is improved when using so called the bandwidth balancing mechanism, the protocol requires a considerable amount of time to adjust to changes in the network load. Additionally, the bandwidth balancing mechanism leaves a portion of the available bandwidth unused. In a high-speed backbone network, each node may act as a bridge/ router which connects several LANs as well as hosts. However, Because the existence of high speed LANs becomes commonplace, the congestionmay occur on a node because of the limitation on access rate to the backbone network and on available buffer spaces. to release the congestion, it is desirable to install some congestion control algorithm in the node. In this paper, we propose an efficient congestion control mechanism and fair and waster-free MAC protocol for dual bus network. In this protocol, all the buffers in the network can be shared in such a way that the transmission rate of each node can be set proportional to its load. In other words, a heavily loaded node obtains a larger bandwidth to send the sements so tht the congestion can be avoided while the uncongested nodes slow down their transmission rate and store the incoming segments into thier buffers. this implies that the buffers on the network can be shared dynamically. Simulation results show that the proposed probotol significantly reduces the segment queueing delay of a heavily loaded node and segment loss rate when compared with original DQDB. And it enables an attractive high throughput in the backbone network. Because in the proposed protocol, each node does not send a requet by the segment but send a request one time in the meaning of having segments, the frequency of sending requests is very low in the proposed protocol. so the proposed protocol signigificantly reduces the segment queuing dely. and In the proposed protocol, each node uses bandwidth in proportion to its load. so In case of limitation of available buffer spaces, the proposed protocol reduces segment loss rate of a heavily loaded node. Bandwidth balancing DQDB requires the wastage of bandwidth to be fair bandwidth allocation. But the proposed DQDB MAC protocol enables fair bandwidth without wasting bandwidth by using bandwidth one after another among active nodes.