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자율주행환경에서 PQC 적용분석을 위한 V2Verifier 분석 및 확장
김영범(YoungBeom Kim),서석충(Seog Chung Seo) 한국통신학회 2022 한국통신학회 학술대회논문집 Vol.2022 No.2
V2Verifier는 자율주행환경에서 사용되는 V2V 통신의 보안을 평가하기 위한 오픈소스 테스트베드이다. 본 논문에서는 V2Verifier의 구조를 분석하고, NIST 양자내성암호 공모전의 결선 전자서명 알고리즘인 Crystals-Dilithium과 Falcon을 자율주행 통신장비 중 하나인 Jetson Xavier 환경에서 V2Verifier에 확장한다.
펄스 기반의 공간다중화 초광대역 시스템을 위한 Zero-Forcing 수신기들의 성능 비교 및 분석
김영범(Youngbeom Kim),김상준(Sangchoon Kim) 한국정보기술학회 2018 한국정보기술학회논문지 Vol.16 No.10
This paper deals with ZF(Zero-Forcing)-based MIMO(Multiple Input Multiple Output) detection methods for spatial multiplexing UWB(Ultra-WideBand) MIMO systems on indoor log-normal multipath fading channels. The conventional ZF detector for a single path channel is extended to log-normal multipath channels and consequently an extended ZF(eZF) receiving structure is considered as a simple implementable version and described in details. The diversity gain offered by the eZF receiver is theoretically analyzed and accordingly its theoretical average BER(Bit Error Rate) expression is derived. Moreover, the eZF detection scheme is compared with other ZF-based MIMO detectors through simulations and theoretical results. In the simulation results, the simple eZF receiver shows better performance than the ZF-Rake receiver, and matches the 2Rake-ZF receiver in terms of theoretical average BER performance.
김영범 ( Kim Youngbeom ) 민족어문학회 2017 어문논집 Vol.- No.79
개항 이후 구한말까지 조선에서는 근대적 국가를 향한 언어적 기획이 진행되었다. 그것은 비주류 집단까지 `국민`으로 아우르려는 작업이었다. 그러나 일제에 의한 국권 침탈은 `국가의 언어`가 설 곳을 잃게 했다. 남은 것은 `민족의 언어`였다. 어문민족주의의 영향 아래 1930년대 전반기에는 <한글마춤법통일안>이 제정되었고, 후반기에는 조선문학이 괄목할 만큼 성장하였다. 하지만 `국가` 없이는 `어문의 표준화`나 `문화의 발전 정도`가 의미를 가지기란 어려웠다. 카프가 해산되고 만주사변이 발발하면서, 일제는 이전과는 확연히 다르게 압박해왔다. 임화는 카프 해산을 계기로 이러한 압박과 그것이 조선에 미칠 영향력에 눈뜨게 되었다. 그가 비평에서 내세웠던 `국제주의`와 `민족주의`의 길항은 조선문학을 세계문학의 일원이 되도록 하려는 노력의 결실이었다. 조선문학의 미래가 거기에 있다고 믿었던 것이다. 따라서 그의 문학론은 `민족 부르주아지`의 언어가 장악하고 있던 당대 조선문학에 대한 이의제기였다고 할 수 있다. `민족 부르주아지`는 임화에게 자기 계급을 위해 민족을 `참칭`하는 이들이었다. 임화가 계급방언과 지역방언을 거부한 까닭은 그가 염두에 두었던 `시민적 문학`을 위해서였다. 그에게 전자는 시민계급을 `개별화`하여 분열시키고, 후자는 `봉건적 격리의 유물`일 뿐이었다. 심미성과 실재성을 사상해버렸다는 점에서 그의 언어관은 분명 문제적이다. 그러나 현대인을 자처했던 임화의 `근대적 통일어`는 미래를 정향하고 있었지, `과거로의 회귀`에 초점을 맞추고 있지 않았다. 그의 판단으로 후자는 파시즘에 포획될 위험에 노출되어 있었다. 1930년대 후반 황국신민화정책은 조선어와 조선문학의 목을 옥죄었다. 이 시기에 임화가 발표한 일문 평론들에는 자신이 견지해온 이론에 대한 부정과 일본 문인들의 이론적 지원에 대한 요구 등이 보인다. 그만큼 상황은 심각했다. 임화가 시민계급의 `근대적 통일어`를 도모하게 된 것은 해방정국에서였다. 그가 요청했던 시민계급의 언어가 `국가의 언어`였다는 사실이 밝혀지는 것도 바로 이때이다. From the period of opening ports to the last period of the Choseon Dynasty, a language project was advanced for a modern nation in Choseon. That made a plan to embrace the people of the lower classes as citizens. But there was no longer any place for the language of nation(Korean) by the Japanese Imperialists` pillage of sovereignty. There remained just the language of Korean. In the early 1930`s Han`geulmachumbeoptong`iran(the draft for unified spelling system of Korean) was established, in the late 1930`s Choseonmunhak(Korean Literature) was brought up significantly. About that time the Japanese Imperialists began to oppress Colonial Choseon more strongly then ever. With the dissolution of KAPF(Korea Artista Proleta Federatio), Im-hwa awaked to implications of these pressures. He insisted antagonistic relationships between `internationalism` and `nationalism`. He believed that Choseonmunhak should join the family of World Literature. His theory of literature raised objection against the bourgeoisie who was advocating nationalism. He vetoed class dialects and regional dialects. He thought that the former can schismatize the citizens, the latter was remnants of feudalistic isolation. Im-hwa emphasized the citizens`s language and literature. His view on language was controversial for reasons of ignoring aesthetic and substantiality. However Im-hwa rejected `turning to the past` which could fall into fascism. And unfortunately his apprehension came true. After Korea became independent, it came to light retroactively that Im-hwa`s language project had intended the language of nation(Korean).
여성형탈모에서 저용량 경구 미녹시딜의 효과 및 안정성: 44명의 환자를 대상으로 한 단일기관 연구
김영범 ( Youngbeom Kim ),이기욱 ( Giwook Lee ),신준오 ( Jun-oh Shin ),노동영 ( Dong Young Roh ),김연아 ( Yeona Kim ),원상현 ( Sang-hyeon Won ),이정수 ( Jungsoo Lee ),신기혁 ( Kihyuk Shin ),김훈수 ( Hoonsoo Kim ),고현창 ( Hyun-chan 대한피부과학회 2024 대한피부과학회지 Vol.62 No.3
Background: Female-pattern hair loss (FPHL) is characterized by diffuse hair thinning in the mid-frontal scalp and increased hair shedding. Although the use of low-dose oral minoxidil (LDOM) is increasing significantly in Korea, data on its use are limited. Objective: To determine the efficacy and safety of LDOM in Korean patients with FPHL. Methods: This retrospective, single-center study was conducted at Pusan National University Hospital. The study included female patients with pattern hair loss who received treatment with LDOM at 1.25 mg/d for a minimum of 6 months in combination with other treatments. Patients were eligible for LDOM addition if their previous treatments showed a limited response and the previous treatment regimen remained unchanged throughout the evaluation period. Clinical response to treatment was evaluated using the Sinclair hair loss severity scale. Results: The study included 44 females with FPHL. Before treatment, the mean Sinclair scale score was 2.77, which decreased to 2.27 after treatment. By the 3rd month, one patient (2.3%) experienced worsening, while seven patients (15.9%) showed slight improvement. By the 6th month, the treatment response was as follows: stabilization in 30 patients (68.2%), slight improvement in 13 patients (29.5%), and substantial improvement in one patient (2.3%). Adverse effects, predominantly hypertrichosis, were observed in nine patients. All adverse effects improved upon discontinuation of LDOM and no life-threatening adverse effects were observed during the study. Conclusion: This study provides evidence that LDOM can be an effective therapeutic option with a good safety profile for FPHL. (Korean J Dermatol 2024;62(3):136∼142)
다중경로 UWB-MIMO 채널에서 Lattice-Reduction이 적용된 Zero-Forcing 선형수신기의 성능 분석
김영범(Youngbeom Kim),김상준(Sangchoon Kim) 한국정보기술학회 2018 한국정보기술학회논문지 Vol.16 No.5
In indoor wireless UWB(Ultra-Wide-Band) communications, MIMO(Multiple-Input Multiple-Output) technology can be combined with UWB systems to enable low-power, high-speed communications. Spatially multiplexed UWB signals can be separated by a ZF(Zero-Forcing) linear receiver. Although the ZF receiver has the advantage of low complexity and easy implementation, noise amplification occurs in the process of separating the spatial data stream, resulting in performance degradation. LR(Lattice-Reduction) techniques create a more orthogonal virtual channel matrix than the original channel matrix and thus reduce the noise amplification by LR-aided ZF receivers. The performance of the LR-based ZF receiver proposed in this work is evaluated and compared with other receivers by simulations.