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전경훈,윤지원 한국테러학회 2025 한국테러학회보 Vol.18 No.2
이 논문의 목적은 증가하는 테러 위협에 대응하기 위해 대테러합동조사팀의 주요 임무와 핵심 역량을 고찰하고, 미국 등 대테러 선진국의 사례를 분석하여 국내 현실에 부합하는 대테러합동조사팀의 역량 강화 방안을 제시하는 데 있다. 이를 위해 최근 테러 양상과 추이를 분석하고 특징을 도출하였다. 이를 바탕으로 대테러조사활동의 개념과 유형을 구분및 분석하였고, 대테러조사활동의 효과성을 향상을 위해서 법적 기반의 구축과 제도적 개선이 선행돼야 한다. 또한 법률적 공백을 방지하기 위한 지침서 마련과 현장조사 절차가 중요하며, 문서 열람, 시료 채취, 자료 제출 및 진술 요구 등 구체적인 조사 기법의 정립이 필요하다. 과학적 조사체계 구축을 통해 합동조사팀원의 역량을 강화하고, 실질적 지원이 가능하도록 기술적 부분을 보완해야 한다. “합동”이라는 명칭에 걸맞게 유관기관 간의 협업을 기반으로 정보 공유와 수집된 자료의 체계적 관리 방안이 보완될 필요가 있다. 결과적으로 다양한 테러 징후를 신속히 식별하고, 선제적 대응 및 발생 즉시의 규명과 대응 방향 제시가 가능한 대테러합동조사팀의 역할에 대한 재인식과 지속적인 역량 강화가 꾸준히 추진돼야 한다. The purpose of this article is to examine the main tasks and core capabilities of the Joint Counter-Terrorism Investigation Team in response to the increasing threat of terrorism, analyze cases from advanced countries in counter-terrorism such as the United States, and suggest ways to strengthen the capabilities of the Joint Counter-Terrorism Investigation Team that are suitable for domestic reality. To this end, the recent patterns and trends of terrorism were analyzed, their characteristics were derived, and the concepts and types of counter-terrorism investigation activities were categorized and analyzed based on this. In addition, in order to increase the effectiveness of counter-terrorism investigation activities, the establishment of a legal foundation and institutional improvement should be preceded, and in particular, the importance of guidelines to prevent legal gaps and on-site investigations is emphasized. It is also necessary to establish specific investigation techniques such as document inspection, sample collection, data submission, and statement requests. The capabilities of the Joint Counter-Terrorism Team members should be strengthened through the establishment of a scientific investigation system, and the technical aspects should be supplemented to enable practical support. In line with the name of 'joint', information sharing based on collaboration between related organizations and systematic management of collected data are also important. In conclusion, it is necessary to re-recognize the role of the Joint Counter-Terrorism Investigation Team, which can quickly identify various signs of terrorism, respond preemptively, and suggest directions for investigation and response immediately after occurrence, and to continuously strengthen its capacity.
포괄적 안보 상황 하에서 한국의 예방적 테러와 대응방안에 대한 고찰
전경훈,윤지원 (사)위기관리이론과실천 2023 Crisisonomy Vol.19 No.8
The article suggests measures to improve awareness and respond to preventive terrorism, by analyzing the current terrorist environment and threats based on the question of what purpose and intention South Korea should seek when it comes up with preventive countermeasures against terrorism under a comprehensive security situation. Through theoretical review of terrorism, it explores the causes of terrorism and the various types and characteristics of terrorism that are currently emerging, analyzes terrorist threats and trends that are rapidly on the rise under comprehensive security conditions, and derives implications through specific threat patterns and trends. Based on these analyses, it sought legal measures to improve awareness of preventive concepts, establish a foundation for prevention on terrorism and response, and suggested the applicability of new technologies implemented in the era of the 4th industrial revolution. In so doing, it proposes a comprehensive policy and a system to prevent conditions that allow for domestic terrorist threat in the future.
A Class of New Blind Equalizers for QAM Signal Sets
전경훈,이원호 에스케이텔레콤 (주) 1996 Telecommunications Review Vol.6 No.2
A class of new blind channel equalization algorithms for QAM signal set is derived. These algorithms are based on the Godard[1] and the stop-and-go algorithms [2] and inherits the desirable properties of both of these algorithms. Being based on the Godard algorithm, carrier recovery is not a prerequisite for equalizer convergence allowing equalization and carrier recovery to be performed independently.Since it is also based on the stop-and-go algorithm, residual error (adaptation noise) after convergence is much smaller than that of the Godard algorithm and is comparable to that of the stop-andgo algorithm. This solves problems associated with large equalizer adaptation noise that may cause instabilities of the carrier recovery circuit [6].Computer simulations are performed for the square 16- QAM and cross 32-QAM signal constellations to demonstrate the performance improvements.
精路閉塞에 관한 硏究 : 造精과 內分泌機능 및 性活動에 미치는 影響
全景勳 서울大學校 保建大學院 1971 公衆保健雜誌 Vol.8 No.2
To investigate the effects of bilateral occlusion of the seminal ducts, biological, histologic, and histochemical studies on vasectomized animals and clinical studies on 35 cases of epididymal obstructions and 99 cases of vasal obstructions were carried out and the results were presented in this report. Ⅰ. Animal study 1) In biological study, no particular effects by vasectomy could be found according to the changes of body weight, and of the weights of certain organs such as prostate, seminal vesicles, epididymes, andtestes before and after the vasectomy. 2) No significant differences in histologic pictures were found between the control group and vasectomy groups by the spermatogenesis the Sertoli cells, and Leydig cells. 3) In histochemical study, the reactive patterns of the alkaline phosphatase activity staining as an indication of metabolic activity of cells and tissues of testes in the vasectomy groups were similar to thise seen in the control group. Ⅱ. Clinical study: 1) In coital frequencies, no significant differences were found between epididymal obstruction group and vasal obstruction group by thier occupations. educational levels, and post-recanalization. No definite changes were found in the average volume of pre-and post-operative ejaculates among groups of epididymal obstruction, vasal obstruction, and normal, even though considerable individual diffences were noted among these subjects. 2) Biochemically, the average value of 17-ketosteroid in 24 hours' urine was 12.7mg in the epididymal obstruction group, and 12.4mg in vasectomy group. It was much the same with the average of normal contro's of smae age group. 3) The testicular biopsies showed no significant changes between groups of epididymal obstruction and vasal obstruction. By way of conclusion, these studies in animal and human revealed that the absence of free passage for sperm did not lead to atrophy of the seminiferous tubules, and that the reproductive deficiency did not involve the endocrine component of the testis. In other words, results of thest studies indicated that not only was spermatogenesis not halted by obstruction of the epididymes or vas deferens, but also that hyperplasia of the Leydig cells did not occur.
Noncoherent Unitary Space-Time Modulated DSSS Systems in Multipath Channels
전경훈,김정창,Youhan Kim,Soongyoon Choi 한국통신학회 2012 Journal of communications and networks Vol.14 No.2
In this paper, in order to effectively apply unitary spacetime modulation to the direct-sequence spread-spectrum multipleaccess (DSSS-MA) networks, we propose a low-rate, noncoherent,unitary, and space-time modulated DSSS system supporting any number of transmit antennas based on Walsh matrices. The proposed scheme simultaneously performs bandwidth spreading and space-time coding and outperforms those using high-rate, conventional unitary space-time constellations. Furthermore, the proposed scheme allows for a simple detector structure based on fast Walsh transforms.