• 대한전자공학회논문지
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• 제19권6호
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• pp.55-61
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• 1982

집적 광학에서 응용되는, 주기가 거의 선형으로 변하는 도파로 격자 필터의 파장에 따른 응답을 격자의 길이가 유한함을 고려하여 수식적으로 구하였다. 이 필터가 광대역 필터로서 설계되는 보편적인 경우에 대해서는 관련된 포물주면 함수를 변수의 위상에 따라 점근 근사를 취함으로써 파장에 따른 응답을 간단한 함수들로써 나타냈다. 또한 구한 결파식들이 기존 근사식들을 특별한 경우로 포함하는 일반적인 식임을 보였다. 마지막으로, 수식적인 해에 의한 결과와 RunRe-Kutta 수치 계산법에 의한 정확한 해를 비교하여 서로 잘 일치함을 확인하였다. An analytic solution for the spectral response of linearly-chirped grating filter is derived, which takes the finite physical length of filter into account. In the usual case of broad-band linearly-chirped grating filter the analytic solution is expressed in terms of elementary functions, by approximating asymptotically the involved parabolic cylinder functions over different ranges of its argument. It is also shown that derived results are general enough to include previously-available approximations as particular cases, and that they agree well with the numerical solutions based upon the Runge-Kutta method.

• Structural Monitoring and Maintenance
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• 제4권1호
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• pp.69-84
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• 2017

Delamination is the most common failure mode in layered composite materials. The author have found that the electrical potential change (EPC) technique using response surfaces method is very effective in assessment delamination in basalt fiber reinforced polymer (FRP) laminate composite pipe by using electrical capacitance sensor (ECS). In the present study, the effect of the electrodes number on the method is investigated using FEM analyses for delamination location/size detection by ANSYS and MATLAB, which are combined to simulate sensor characteristic. Three cases of electrodes number are analyzed here are eight, twelve and sixteen electrodes, afterwards, the delamination is introduced into between the three layers [$0^{\circ}/90^{\circ}/0^{\circ}$]s laminates pipe, split into eight, twelve and sixteen scenarios for cases of eight, twelve and sixteen electrodes respectively. Response surfaces are adopted as a tool for solving inverse problems to estimate delamination location/size from the measured EPC of all segments between electrodes. As a result, it was revealed that the estimation performances of delamination location/size depends on the electrodes number. For ECS, the high number of electrodes is required to obtain high estimation performances of delamination location/size. The illustrated results are in excellent agreement with solutions available in the literature, thus validating the accuracy and reliability of the proposed technique.

• Asian Pacific Journal of Cancer Prevention
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• 제14권8호
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• pp.4595-4598
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• 2013

We conducted a comprehensive study to investigate the role of genes involved in transport pathways in response to chemotherapy and clinical outcome of osteosarcoma cases. Genotyping of six SNPs was performed in a 384-well plate format on the Sequenom MassARRAY platform for 208 osteosarcoma patients to reveal any correlations of the six SNPs with response to chemotherapy and clinical outcome. Individuals with the ABCB1 rs1128503 TT and ABCC3 rs4148416 TT genotypes had a higher probability of responding poorly to chemotherapy, indicated by odds ratios (ORs) of 2.46 (95%CI, 1.21-5.74) and 3.78 (95% CI, 1.20-13.85), respectively. Moreover, the ABCB1 rs1128503 TT and ABCC3 rs4148416 TT genotypes were significantly associated with shorter diseasefree survival (DFS) and overall survival (OS). Our study found the two SNPs in two transporter genes and one phase II metabolism enzyme to be associated with response to chemotherapy and overall survival in osteosarcoma patients, suggesting potential prognostic biomarker applications of the two SNPs.

• 융합신호처리학회논문지
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• 제8권1호
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• pp.32-38
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• 2007

강의실에서의 환경조건을 확립하기 위해 PA(Public-Address)를 사용한 경우와 PA를 사용하지 않은 경우의 두 가지 패턴으로 임펄스 응답을 측정하였다. 측정결과에 의해 음성 명료도에 관련된 음향물리지표를 계산하고 PA 유무에 의한 각 지표의 차이를 검토하였다. 그리고 임펄스 응답을 이용하여 4연속 음절 명료도 시험을 하여 잔향에 따른 PA사용이 어느 정도 음성 듣기를 향상시키고 있는가도 검토하였다. 그 결과, 잔향이 어느 정도 적은 경우에는 PA에 의한 음압레벨의 향상이 충분한 명료도의 개선이 되는 가능성이 있으나 잔향이 긴 경우에는 제시 음압레벨을 높여도 PA 시스템에서는 명료도의 개선이 기여되지 않는다는 것을 알 수 있었다.

• Restorative Dentistry and Endodontics
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• 제10권1호
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• pp.93-101
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• 1984

The experimental study was made to investigate the effect of the "Heliosit" composite resin on the dental pulp. The 36 class V cavities were prepared on the healthy permanent teeth of 3 days, and were divided into 5 groups and filled with the experimental filling materials. Control group: Zinc Oxide-Eugenol cement filling Experimental groups: Group 1: Dentin Adhesit application & Heliosit filling with or without dycal base Group 2: Heliosit filling with or without dycal base Group 3: Durafill filling with dycal base Group 4: Hipol filling with dycal base Animals were sacrificed after 1 weeks, 2 weeks, and 4 weeks following operation. The teeth were decalcified, sectioned and stained with hematoxylin and eosin. The results obtained form this study were as follows: 1. All experimental group showed slight pulp response. 2. Dentin Adhesit group showed minimal pulp response in both dycal bases and no base cases. 3. In group 2, mild pulp response was found in early stage and repairing process was found as the time elapsed. In no base cases, healing process was delayed slightly. 4. There was little difference in the result among Heliosit group, Durafill group and Hipol group.

• 한국중재학회지:중재연구
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• 제33권2호
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• pp.23-52
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• 2023

In this thesis, the domestic and foreign legislative background and legislative process of the Serious Accident Punishment Act were reviewed, and the Serious Accident Punishment Act in Korea was reviewed. In 2022, more safety accidents occurred in the construction industry than in other fields, and in particular, the most deaths occurred in the 'fall' type. In April 2023, regarding two criminal first-instance trial cases, the courts all sentenced guilty, and in one case, the representative of the company(CEO) was sentenced to imprisonment and was arrested. In response, the management side expresses the opinion that the punishment is excessive and there is a concern that corporate management will shrink, while the workers side(Union) argues that the responsibility of the business operator or manager should be strengthened by heavier punishment. As a countermeasure to overcome rationally, we present a plan in terms of legislation and resolution process. In other words, we present a review of the amendment to the Serious Accident Punishment Act and the Court Organization Act. In addition, guidelines for the a safety and health system must be implemented, and if an accident occurs, it must be dealt with reasonably. As a result, safety accidents in the construction industry should drastically decrease and safety culture should be properly established.

• Structural Engineering and Mechanics
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• 제87권4호
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• pp.347-361
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• 2023

This research aims to assess the behavior of reinforced concrete (RC) residential buildings when moment-resisting frames (MRFs) are used as the lateral resisting system. This investigation was conducted using MIDAS Gen v.19.0. Buildings with various plan footprints (Square, Rectangular, Circular, Triangular, and Plus-Shaped), and different heights (15 m, 30 m, 45 m, and 60 m) are investigated. The defined load cases, the equivalent static lateral load pattern, and the response spectrum function were defined as stated by the American Standard (ASCE 7-16), the 1997 Uniform Building Code (UBC97), the Egyptian Code for Loads (ECP-201), and the European Standard (EC8). Extensive comparisons of the results obtained by the different codes (including the story displacement, the story drift, and the base shear) were undertaken; to assess the response of moment-resisting multi-story framed buildings under lateral loads. The results revealed that, for all study cases under consideration, both ECP-201 and EC8 gave smaller base shear, displacement, and drift by one third to one fourth, around one fourth, around one fifth, respectively for both the ELF and RSA methods if compared to ASCE 7-16 and UBC97.

• Radiation Oncology Journal
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• 제22권4호
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• pp.247-253
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• 2004

목적: 하인두암은 대부분 진행되어 진단이 되며 예후가 불량한 것으로 알려져 있다. 이에 4기 병기 하인두암에서 선행 항암화학요법 후 방사선치료를 시행하여 반응과 생존율에 미치는 영향을 알아보고자 하였다. 대상 및 방법: 1989년 7월부터 2000년 2월까지 원격전이가 없었던 AJCC 병기 4기의 하인두암으로 진단되어 선행 항암화학요법후 방사선치료를 받았던 18예를 대상으로 후향적 분석을 하였다. 선행화학요법은 5-FU와 cisplatln을 병용하여 3주 간격으로 모든 환자에서 2회 시행하였다. 총방사선량은 원발병소와 전이된 임파절에 $6834\~72.0$Gy까지 조사하였다(중앙값: 70.2 Gy). 결과: 추적관찰기간은 7개월에서 99개월이었다(중앙값 28개월). 3년 생존율 및 무병생존율은 각각 $41.7\%$, $31.1\%$였다. 6예($33.3\%$)에서 3년 이상 후두 보존이 가능하였다. 선행 항암화학요법 후 16예($88.8\%$)에서 부분관해를 보였고, 완전관해, 무반응은 각각 1예($5.6\%$)에서 관찰되었다. 모든 치료가 끝난 후 치료 반응으로 완전관해는 13예($72.2\%$), 부분관해가 5예($27.8\%$)로 반응률은 $100\%$였다. 생존율에 영향을 미치는 예후인자에 대한 분석에서 선행 항암화학요법과 방사선치료 후에 완전관해를 보인 군과 부분관해를 보인 군의 3년 생존율과 무병생존율이 각각 $43.1\%$ $20.0\%$와 $39.6\%$, $20.0\%$로 의미있는 차이를 보였으며(p=0.0003, p=0.002) 모든 치료가 끝난 후 최종 치료 반응만이 통계학적으로 유의성이 있었다. 결론: 4기 병기 하인두암에서 선행 항암화학요법 후의 방사선치료는 심각한 부작용없이 효과적이었다.

• Advances in Computational Design
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• 제8권1호
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• pp.13-36
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• 2023

The Puebla-Morelos Earthquake (Mw 7.1) occurred in Mexico in 2017 causing 44 buildings to collapse in Mexico City. This work evaluates the non-linear response of a 6-story reinforced concrete (RC) frame prototype model with masonry infill walls on upper floors. The prototype model was designed using provisions prescribed before 1985 and was subjected to seismic excitations recorded during the earthquakes of 1985 and 2017 in different places in Mexico City. The building response was assessed through a damage index (DI) that considers low-cycle fatigue of the steel reinforcement in columns of the first floor, where the steel was modeled including buckling as was observed in cases after the 2017 earthquake. Isocurves were generated with 72 seismic records in Mexico City representing the level of iso-demand on the structure. These isocurves were compared with the location of 16 collapsed (first-floor column failure) building cases consistent with the prototype model. The isocurves for a value greater than 1 demarcate the location where fatigue failure was expected, which is consistent with the location of 2 of the 16 cases studied. However, a slight increase in axial load (5%) or decrease in column cross-section (5%) had a significant detrimental effect on the cumulated damage, increasing the intensity of the isocurves and achieving congruence with 9 of the 16 cases, and having the other 7 cases less than 2 km away. Including column special detailing (tight stirrup spacing and confined concrete) was the variable with the greatest impact to control the cumulated damage, which was consistent with the absence of severe damage in buildings built in the 70s and 80s.

• 시큐리티연구
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• 제41호
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• pp.357-386
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• 2014

본 연구는 경찰의 112 신고와 해양경찰의 122 신고를 중심으로 경찰 관련 긴급신고의 실태를 분석하고, 이를 기초로 경찰 관련 긴급신고에 대한 개선방안을 모색해 보고자 하는데 그 목적이 있다. 이러한 목적을 달성하기 위하여 2013년 국정감사요구자료의 경찰 관련 긴급신고 통계자료 중심으로 신고유형별 접수 현황, 출동 현황, 5분내 현장도착률 및 평균도착시간 등의 측면에서 실태를 분석하였다. 경찰 관련 긴급신고 실태분석의 주요한 결과를 살펴보면, 첫째, 경찰 관련 신고 전체 접수 건수에서 경찰의 112 신고는 증가하는 경향을, 해양경찰 122 신고는 증감을 반복하는 경향을 나타냈으며, 둘째, 접수 건수 중 비출동신고, 민원, 안내 등 비긴급신고의 접수 건수가 증가하는 것으로 나타났으며, 셋째, 해양경찰의 122 신고에 있어 장난신고의 비율이 높았으며, 타기관 이첩($122{\rightarrow}112$)의 비율도 적지 않은 것으로 나타났으며, 넷째, 경찰의 112신고와 관련해서 신고 접수 후 출동 건수와 평균 도착 시간이 감소하는 것으로 나타났다. 이러한 연구결과를 바탕으로 경찰 관련 긴급신고를 개선해 나가기 위해서는 경찰 관련 신고를 이원적으로 운용하는 것, 허위 거짓 경찰 관련 긴급신고에 대한 홍보와 엄중한 대응, 그리고 경찰 관련 긴급 신고 시스템을 지속적으로 개선하는 것이 요구된다.