사법시험의 이단자(異端者)

이찬호 한국사법행정학회 1967 사법행정 Vol.8 No.8

하드웨어 구현에 적합한 효율적인 LDPC 코덱의 설계

이찬호,박재근 대한전자공학회 2006 電子工學會論文誌-SD (Semiconductor and devices) Vol.43 No.7

Low-density parity-check (LDPC) codes are recently emerged due to its excellent performance. However, the parity check (H) matrices of the previous works are not adequate for hardware implementation of encoders or decoders. This paper proposes a hybrid parity check matrix which is efficient in hardware implementation of both decoders and encoders. The hybrid H-matrices are constructed so that both the semi-random technique and the partly parallel structure can be applied to design encoders and decoders. Using the proposed methods, the implementation of encoders can become practical while keeping the hardware complexity of the partly parallel decoder structures. An encoder and a decoder are designed using Verilog-HDL and compared with the previous results. Low Density Parity Check (LDPC) code는 최근 그 우수한 성능으로 인하여 4세대 무선 이동 통신용 채널 코딩으로 주목받고 있고 유럽의 고화질 위성방송 규격으로 채택되었다. 그러나 기존의 연구들이 제안한 parity check matrix (H-matrix)는 실제로 하드웨어로 구현함에 있어서 인코더 혹은 디코더에 제약을 가지고 있다. 이러한 문제점을 해결하고자 본 논문에서는 인코더와 디코더 양쪽 모두 효율적으로 하드웨어로 구현이 가능한 hybrid H-matrix 구조를 제안한다. Hybrid H-matrix는 semi-random 방식과 partly parallel 방식을 결합하여 하드웨어로 구현시 partly parallel 방식이 가지는 디코더의 복잡도가 감소되는 장점을 유지하면서 인코더 또한 semi-random 방식을 사용하여 복잡도가 감소된다. 제안한 구조를 사용하여 LDPC 인코더와 디코더를 설계하고 합성하여 기존의 결과와 비교하였다.

휴대용 연료전지를 위한 부탄 자열개질에 관한 연구

이찬호,배중면,강인용,배규종,임성광,김주용 대한기계학회 2006 大韓機械學會論文集B Vol.30 No.11

SoC(System-on-Chip)

이찬호 한국정보통신기술협회 2004 TTA저널 Vol.93 No.-

A Viterbi Decoder with Efficient Memory Management

이찬호 한국전자통신연구원 2004 ETRI Journal Vol.26 No.1

This paper proposes a new architecture for a Viterbi decoder with an efficient memory management scheme. The trace-back operation is eliminated in the architecture and the memory storing intermediate decision information can be removed. The elimination of the trace-back operation also reduces the number of operation cycles needed to determine decision bits. The memory size of the proposed scheme is reduced to 1/(5×constraint length) of that of the register exchange scheme, and the throughput is increased up to twice that of the trace-back scheme. A Viterbi decoder complying with the IS-95 reverse link specification is designed to verify the proposed architecture. The decoder has a code rate of 1/3, a constraint length of 9, and a trace-forward depth of 45.

Design of Encoder and Decoder for LDPC Codes Using Hybrid H-Matrix

이찬호 한국전자통신연구원 2005 ETRI Journal Vol.27 No.5

Low-density parity-check (LDPC) codes have recently emerged due to their excellent performance. However, the parity check (H) matrices of the previous works are not adequate for hardware implementation of encoders or decoders. This paper proposes a hybrid parity check matrix which is efficient in hardware implementation of both decoders and encoders. The hybrid H-matrices are constructed so that both the semi-random technique and the partly parallel structure can be applied to design encoders and decoders. Using the proposed methods, the implementation of encoders can become practical while keeping the hardware complexity of the partly parallel decoder structures. An encoder and a decoder are designed using Verilog-HDL and are synthesized using a 0.35 μm CMOS standard cell library.

Evaluation of holmium laser for transurethral deroofing of severe and multiloculated prostatic abscesses

이찬호,구자윤,박현준,이정주,신동길 대한비뇨의학회 2015 Investigative and Clinical Urology Vol.56 No.2

Purpose: Our objective was to evaluate the use of a holmium laser for transurethral deroofing of a prostatic abscess in patients with severe and multiloculated prostatic abscesses. Materials and Methods: From January 2011 to April 2014, eight patients who were diagnosed with prostatic abscesses and who underwent transurethral holmium laser deroofing at Pusan National University Hospital were retrospectively reviewed. Results: Multiloculated or multifocal abscess cavities were found on the preoperative computed tomography (CT) scan in all eight patients. All patients who underwent transurethral holmium laser deroofing of a prostatic abscess had successful outcomes, without the need for secondary surgery. Of the eight patients, seven underwent holmium laser enucleation of the prostate (HoLEP) for the removal of residual adenoma. Markedly reduced multiloculated abscess cavities were found in the follow-up CT in all patients. No prostatic abscess recurrence was found. Transient stress urinary incontinence was observed in three patients. The stress urinary incontinence subsided within 3 weeks in two patients and improved with conservative management within 2 months in the remaining patient. Conclusions: Transurethral holmium laser deroofing of prostatic abscesses ensures successful drainage of the entire abscess cavity. Because we resolved the predisposing conditions of prostatic abscess, such as bladder outlet obstruction and prostatic calcification, by simultaneously conducting HoLEP, there was no recurrence of the prostatic abscesses after surgery. We recommend our method in patients requiring transurethral drainage.

PN 다이오드에서의 열잡음과 산탄 잡음 ( Thermal Noise and Shot Noise in PN Diodes )

이찬호,민홍식,박영준 대한전자공학회 1989 대한전자공학회 학술대회 Vol.1989 No.1

인터넷 주문처리를 위한 잔업생산스케쥴링 ( Overtime Production Scheduling for Order Processing on Internet )

이찬호,임석철 한국경영과학회 1998 한국경영과학회 학술대회논문집 Vol.- No.1

부동산보유비중의 기업가치 관련성 : 코스피기업과 코스닥기업의 비교

이찬호 한국융합학회 2018 한국융합학회논문지 Vol.9 No.11

본 연구는 기업의 부동산보유비중이 기업가치에 어떤 영향을 미치는가에 대하여 코스피시장기업과 코스닥시장기업 을 대상으로 분석하였다. 분석기간은 금융위기 기간(2007~2008년), 금융위기 직후기간(2009~2011년), IFRS 도입 이후 기 간(2012~2016년)이며, 코스피 2761개 기업연도, 코스닥 3719개 기업연도의 표본을 사용하였다. 회귀분석 결과 전체적으로 기업의 부동산보유비중이 높을수록 기업가치는 음(-)의 관련성을 갖고 있었고, 이를 각 시장별로 비교해 보면 금융위기 기 간 중에는 코스피기업과 코스닥기업 모두 통계적으로 유의한 영향을 미치지 않았으며, 금융위기 직후에는 코스닥기업이 코 스피기업에 비해 기업가치에 더 큰 음(-)의 영향을 미쳤으나 IFRS도입 이후 최근까지는 코스피기업이 코스닥기업에 비해 기업가치에 더 큰 음(-)의 영향을 미쳤다. 따라서 각 기업은 그 기업에서의 적정한 부동산보유비중 정도를 파악하는데 보다 많은 관심을 가져야 할 것이고 각 기업이 보유한 부동산의 최유효활용방안에 대한 분석과 결정을 끊임없이 해야 할 것으로 판단된다. 본 연구는 부동산보유비중의 기업가치 관련성에 대하여 기간을 3개로 구분하여 각각의 기간에 대하여 코스피시장 기업과 코스닥시장기업에 따른 그 영향정도를 각각 비교한 점에서 차별성을 갖는다. 향후 기업의 부동산보유비중에 영향을 미치는 요인을 포함하는 연구를 희망한다. The purpose of this study is to analyze how Corporate Real Estate Ratio affects Firm’s Value for KOSPI Companies and KOSDAQ Companies. The period of analysis is the period of the Financial Crisis (2007-2008), the period immediately after the Financial Crisis (2009-2011), and the period following the introduction of IFRS (2012-2016). The samples of 2761 KOSPI Companies years and 3719 KOSDAQ Companies years are used in this study. The result of Regression Analysis shows that the higher Corporate Real Estate Ratio is, the more negative Firm’s Value is. In the comparison of markets, both KOSPI Companies and KOSDAQ Companies had no statistically significant effects during the Financial Crisis. Although KOSDAQ Companies had a greater negative effect on the Firm’s Value than KOSPI Companies right after the Financial Crisis, KOSPI Companies have had a greater negative influence on the Firm’s Value than KOSDAQ Companies since the introduction of IFRS. Therefore, each corporation should pay more attention to identifying the appropriate amount of their Corporate Real Estate Ratio and should continue to analyze and make decisions on the most efficient use of real estate which is owned by each company. This study shows speciality in dividing into three period, such as the period of the Financial Crisis, the period immediately after the Financial Crisis, and the period following the introduction of IFRS and comparing the degree of influence on the KOSPI Companies and KOSDAQ Companies for the each period. I hope to study the factors that affect the company’s real estate policy.