사법시험의 이단자(異端者)

이찬호 한국사법행정학회 1967 사법행정 Vol.8 No.8

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.

[특집 기획 II] 글로벌 게임시장의 흐름과 전망

이찬호 한국스마트미디어학회 2012 It's Smart Media Vol.1 No.4

자본구조에 관한 동태적 연구

이찬호,변종국 한국재무관리학회 2014 財務管理硏究 Vol.31 No.4

Our research is not to explain the capital structure of a firm by exogenous factors (stock price and interest rate etc.), but to analyze the dynamics of leverage ratio of firms that increase in leverage through proactive and intentional debt issuances. Our sample consists of 155 firms between 2000 and 2012 in which they increase the leverage ratio at least 10% above more than that of previous year and that result in at least 10% more than our estimates of their target leverage ratio. The target leverage ratio is estimated using the tobit regression (censored at 0 and 1) with the variables found in the existing papers. The evolution of leverage ratio is tracked as many as five years after the leverage increase. Firms that intentionally increase leverage ratio through substantial debt issuances aim primarily at operating needs like long-term investments rather than a desire to make a large equity payout. Subsequent debt reductions thereafter are neither rapid, nor the result of proactive attempts to rebalance the firm’s capital structure toward a long-run target. Instead, the changes in the firm’s leverage ratio depend on primarily on the extent of the firm’s free cash flow and the development of opportunity investments. In fact, firms that generate financial surplus repay debts more aggressively even below the target rather than increases of equity payouts or cash reserves, while those generating financial deficits vary on the debt redemptions in the short-term depending on above or below the target leverage. Firms suffering in cumulative financial deficits tend to cover these deficits with more debts even though they exhibit leverage ratios that are above the target. Our findings are incomplete to fully reconcile with traditional capital structure models (trade-off theory and pecking order theory) even though some aspects can be viewed as being consistent with those models. However our findings are broadly consistent with a dynamic capital structure in which financial flexibility, in the form of unused debt capacity, plays an important role in capital structure choice. 본 연구는 주식가격이나 이자율 등 기업 외생적 요인(exogenous factors)을 이용하여 기업의 자본구조를 설명하는 것이 아니라 선제적으로 의도된(proactive and intentional) 신규 차입금의 증가가 있는 기업을 대상으로 부채비율을 동태적으로 분석하는 것을 목적으로 한다. 이를 위하여 2000년부터 2012년의 기간 동안에 차입금의 증가로 인하여 부채비율이 전년도 대비 10% 이상 증가하고, 동시에 증가된 부채비율이 추정한 목표부채비율을 10% 이상 초과한 기업 155개로 표본을 구성하였다. 그리고 표본기업의 목표부채비율은 기존의 연구에서 밝혀진 변수들을 바탕으로 토빗 회귀분석(tobit regression)으로 추정하였고, 추정기간 이후 5년간 연차별 부채비율의 변화추이를 분석하였다. 그 결과 일정 금액 이상의 차입금 증가를 통해 선제적으로 부채비율이 상승된 기업들은 주주 보상보다는 주로 장기투자 등 영업관련 목적을 위한 것이었다. 부채비율 증가 후 차입금의 축소는 단기간에 급격하게 이루어지지도 않았고, 목표자본구조로 조정하기 위한 선제적인 시도들도 없었다. 대신에 부채비율의 변화는 주로 현금흐름 실현상황이나 투자기회의 진행에 따라 이루어졌다. 현금흐름이 잉여인 경우에는 배당금이나 주주보상, 현금유보액의 증가보다는 우선적으로 차입금을 상환하였고, 현금흐름이 적자인 경우에는 목표자본구조의 초과 여부에 따라 단기적으로는 차입금 상환에 차이가 나타났다. 적자가 지속되는 경우에는 차입금을 통하여 자금조달을 하였고 그 결과 부채비율은 목표부채비율을 초과한 상태로 유지되었다. 본 연구 결과는 자본구조이론의 절충이론과 순위이론에 일부 부합하는 면도 있었지만 이 이론들로 표본기업의 자본구조 정책을 설명하는 데에는 한계가 있었다. 그러나 표본기업의 자본구조는 미래의 차입금 조달여력 등 재무유연성이 자본구조결정의 주요 요인이라는 동태적 자본구조 이론을 지지한다고 판단된다.

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

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

공동주택의 장기수선충당금 사용액과 일반보수비 사용액에 영향을 미치는 요인 분석 : 부산시 공동주택의 입찰공사비를 대상으로

이찬호 대한산업경영학회 2022 산업융합연구 Vol.20 No.5

오늘날 주거형태 중 공동주택이 차지하는 비중은 매우 높다. 본 연구는 장기수선충당금과 일반보수비를 사용 한 입찰공사비의 차이와 이들 두 항목의 사용액에 영향을 미치는 요인들의 차이를 분석하였다. 이를 위해 공동주택 관리정보시스템에서 2017년부터 2021년까지 부산시의 대표적인 7개 구에 소재하는 공동주택단지에 대한 관련 자 료를 수집하여 분석하였다. 통계분석결과 입찰형태변수가 입찰공사비에 가장 큰 음(-)의 영향을 미쳤고, 그 다음으 로 영향을 미치는 요인은 장기수선충당금 사용액과 일반보수비 사용액 간에 차이가 있었다. 또한 입찰공사건수에 대한 공사년도별 입찰형태도 장기수선충당금을 사용한 경우와 일반보수비를 사용한 경우 간에 통계적 유의성에 차 이가 있었다. 본 분석결과는 입찰공사비의 절감방안을 모색하는데 도움이 될 것이다. 다만 기술능력 등 좀 더 세부 적인 변수의 투입을 통해 추가적인 의미를 찾기를 기대한다. Today, apartment houses account for a very high proportion of the types of residence. This study analyzed the difference between the bidding construction cost using the long-term repair allowance and using the general repair cost, and analyzed the difference of factors affecting the amount of use of these two items. For this purpose, related data on apartment housing complexes located in seven representative districts of Busan from 2017 to 2021 were collected and analyzed from the apartment housing management information system. As a result of statistical analysis, the type of bidding variable had the greatest negative(-) effect on the bidding construction cost, and the next factor that affected was different between the amount of long-term repair allowance used and general repair cost used. In addition, there was a difference in statistical significance in the type of bidding by construction year for the number of bidding works between the case of using the long-term repair allowance and the case of using the general repair cost. The results of this analysis will help to find ways to reduce bidding construction costs. However, it is expected to find additional meaning by including more detailed variables such as technical ability.