• 정보처리학회논문지A
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• 제11A권7호
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• pp.571-576
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• 2004

비선형 클라인 고든 방정식의 수치해를 구하기 위해 라그란제 보간을 사용하는데 비선형 항을 계산하기위해 보간식의 차이가 거의 없는 변형된 식을 사용하여 해의 .안정성과 해의 수렴성을 밝히고 오차를 분석하였다. 즉 $I(x)^{3}$ 대신에 $f(x_i)^{3}I_i(x)$을 사용하였으며 오차는 $C(\frac{1}{N})^{N-1} hN(N-1)(\frac{N}{2})^{N-1} /(\frac{N}{2})!$ 이하임을 보였고 석기서 N은 다항식의 차수이다.

• 한국결정학회지
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• 제10권2호
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• pp.105-109
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• 1999

Ar 기류 하에서 Re(N-C6H3-2,6-i-Pr2)2Cl3(py) (1)과 propionaldehyde (C2H5CHO)가 반응하여 생성된 혼합물에서, [cis-ReCl4(py)(N-C6H3-2,6-i-Pr2)·(NH2-C6H3-2,6-i-Pr2)] (2)가 분리되었다. 이 화합물의 구조가 X-ray 회절법으로 규명되었다. 착물 2의 결정학 자료: 단사정계 공간군 P21/n, a=11.555(1) Å, b=27.066(3) Å, c=11.881(1) Å, β=117.991(8)°, Z=4, R(wR2)=0.0332(0.0851.

• 토지주택연구
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• 제11권4호
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• pp.115-124
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• 2020

Incentive/Disincentive (I/D) contract is designed for minimizing any disruption of traffic flow in road construction projects. I/D contracting projects have been evaluated with regard to time and cost performance in various states, more than 35 states. However, construction project managers and planners have little understanding of the project factors that affect the project time and cost performance of highway construction projects using I/D regulations. Therefore, the purpose of this research is to find factors that affect I/D project success or failure to improve the decision-making process for the implementation of I/D projects. In order to achieve the objectives of this research, the researchers collected I/D road construction project data from FDOT and performed evaluation for each collected project. Then, project data analysis to identify key factors that affect I/D project performance was performed. In conclusion, five significant factors for project time performance and six significant factors for project cost perfornace were identified and summarized.

• 상하수도학회지
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• 제23권3호
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• pp.287-293
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• 2009

The study involved the measurement of flowrate and BOD in the Yeoju area and analyzed annual sewerage data by the I/I analysis technique which is common in Korea. The results of this study are as follows. The I/I for the Y-1 site before maintenance and after the completion of the whole process was reduced from 62% to 16.1% respectively with respect to maximum sewage flow per day. The average quality of water increased. The study measured the Y-2 site from a point of time corresponding to an 80% process rate and its I/I rate went up a little from 8.5% to 11.5%. At the Y-3 site, the I/I rate went up a little from 11% to 13.8%, while little change was noted in the average water quality. At the Y-4 site, the I/I rate was reduced from 43% to 16.9% and its average water quality went up. At the Y-5 site, the I/I quantity went up a little however its average water quality also went up largely. Therefore, it was concluded that the Y-5 site showed great improvement due to the sewer pipe maintenance.

• 대한기계학회논문집A
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• 제25권11호
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• pp.1829-1834
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• 2001

The aim of this study is to investigate the ductile fracture behavior under mixed mode (I/II) loading using SA533B pressure vessel steel. Anti-symmetric 4-point (AS4P) bonding tests were performed to obtain the J-R curves under two different mixed mode (I/II) loadings. In addition, the fractographic examination of fracture surfaces was carried out to compare with those of pure Mode I and Mode II. In conclusions, the J-R curves under Mixed Mode (I/II) loading were located between those of Mode I and Mode II loadings. When the mixture ratio of mixed mode (I/II) loading was high, the J-R currie of mixed mode (I/II) loading approached that of pure mode I loading after some amount of crack propagation. In contrast with the above fact, if the mixture ratio was low, the J-R curve looked after that of pure mode II loading. The fractographic evidences such as the shape of dimples under different loading conditions supported these conclusions.

• 도서관문화
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• 제53권11호
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• pp.11-28
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• 2012

• 월간양계
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• 제33권11호통권385호
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• pp.158-159
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• 2001

• Journal of Radiation Protection and Research
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• 제11권1호
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• pp.37-43
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• 1986

ICRU 구(球)를 피사체(被射體)로 하여 300 keV 중성자(中性子)의 방사선량(放射線量) 관계량(關係量)을 평가(評價)하였다. 피사체내(被射體內)의 선량당량(線量當量) 분포(分布)를 직접(直接) 산정(算定)하기 위해 중성자(中性子)-광자(光子)-하전입자(荷電粒子) 결합수송(結合輸送)을 다룰 수 있는 몬테칼로 코드 NEDEP을 사용하였다. 계산결과(計算結果) 얻은 방사선량(放射線量) 관계량(關係量)은 다음과 같다. 심부선량당량지수(深部線量當量指數) $H_{I,d}:1.78{\times}10^{11}\;Sv-cm^2$ 표층선량당량지수(表層線量當量指數) $H_{I,s}:2.08{\times}10^{-1}\;Sv-cm^2$ 주위선량당량(周圍線量當量) $H^*(0.07):1.70{\times}10^{-11}\;Sv-cm^2$ 주위선량당량(周圍線量當量) $H^*(10):1.78{\times}10^{-11}\;Sv-cm^2$ 실효선질계수(實效線質係數) $\bar{Q}^*(10):12.4$

• 한국통신학회논문지
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• 제31권6A호
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• pp.640-647
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• 2006

본 논문에서는 IEEE 802.11i 무선 랜 보안을 위한 AES(Advanced Encryption Standard) 기반 CCMP (Counter mode with CBC-MAC Protocol) 코어의 설계에 대해서 기술한다. 설계된 CCMP 코어는 데이터의 기밀성을 위한 CTR(counter) 모드와 인증 및 데이터 무결성 검증을 위한 CBC 모드의 동작이 두개의 AES 암호 코어로 병렬처리 되도록 설계되어 전체 성능의 최적화를 이루었다. AES 암호 코어에서 하드웨어 복잡도에 가장 큰 영향을 미치는 S-box를 composite field 연산 방식을 적용하여 설계함으로써 기존의 LUT(Lookup Table) 기반의 구현방식에 비해 게이트 수가 약 27% 감소되도록 하였다. 설계된 CCMP 코어는 Excalibur SoC 장비를 이용하여 H/W-S/W 통합 검증을 수행하였으며, 0.35-um CMOS 표준 셀 공정으로 MPW 칩으로 제작하고, 제작된 칩의 테스트 결과 모든 기능이 정상 동작함을 확인하였다. 설계된 CCMP 프로세서는 약 17,000개의 게이트로 구현되었으며, 116-MHz@3.3-V의 클록으로 안전하게 동작하여 353-Mbps의 성능이 예상되어 IEEE 802.11a와 802.11g 표준의 MAC 성능인 54-Mbps를 만족한다.

• 전기전자학회논문지
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• 제18권4호
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• pp.502-508
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• 2014

This paper has reviewed the performances of various AGCs which can be adopted in IEEE802.11p modems. IEEE802.11p, a high speed mobile communication standard for vehicles, requires high performance signal detector since the channel impulse responses are varied rapidly in time. In order to select the optimal signal detector, we simulated the performances of three detection methods. One is using RSSI signal, the other is using RSSI signal and I/Q signal, and the third is using I/Q signal through the Monte Carlo simulation. We evaluated the performances of the algorithms using our own system based on MAX 2829 transceiver(MAXIM $Integrated^{TM}$) in a real vehicular environment. As a result, the experiment using Fully I/Q signal derives the most excellent performance with the lowest minimum receiver sensitivity, packet error rate (PER) and false alarm rate (FAR).