이정암과 연안성 전투의 군사적 의의

이영석 ( Youngseok Lee ) 미래군사학회 2019 한국군사학논총 Vol.8 No.1

On April 13, 1592, the invasionof Japanese army into Joseon (former Korea) began the Japanese invasion of Korea (Imjinwaeran). In the beginning, Joseon soldiers were continually defeated by the Japanese army. There were many reasons for the defeat in the battle, but the biggest cause was the loss of public support from people due to the tyranny of their military commanders and public officials. As a result, King Seonjo not only fled to Uiju, but also sought asylum in the Ming Dynasty, thus the country facing the brink of ruin. Under the situation, the former public officials and prominent scholars started to recruit the members of righteous army. Patriotic people, regardless of their classes, volunteered to fight their lives only in order to save the country from the Japanese invasion. Lee Jeongam also raised an army under the same situation, and with him, some 1,400 volunteer soldiers and people were mixed up to fight 5,000 Japanese soldiers led by Kuroda Nagamasa, which was one of the most elite troops in the Japanese military. The military implications which resulted in the victory under the commader of the righteous army, Lee Jeongam at the Yeonanseong battle are as follows. First, it was the first fortress defending battle which was won by Joseon for the first time. Second, soldiers and general people united to fight the Japanese soldiers. Third, the righteous army of Joseon had a thorough combat preparation and effective combat action. Fourth, they had the mentality of civil defense and the spirit of patriotism of defending their homecountry to the end of their life. Fifth. they could sustain the ability of continuing the battles by securing the Yeonbaek rice field areas (breadbasket area). Sixth, the line of border was established which linked between three provinces: Chungcheong-do, Jeolla-do and Gyeongsang-do, and the King's temporary quarters (Haengjaeso) located in Uiju (King Seonjo). What’s disappointing is that since the critical locations in this study are located in North Korea, the study has been lacking research and attention. So, the continuous and systematic research is required in the future.

Pyrexia is a new thermal transient receptor potential channel endowing tolerance to high temperatures in Drosophila melanogaster

Lee, Youngseok,Lee, Yong,Lee, Jaejung,Bang, Sunhoe,Hyun, Seogang,Kang, Jongkyun,Hong, Sung-Tae,Bae, Eunkyung,Kaang, Bong-Kiun,Kim, Jaeseob Nature Pub. Co 2005 Nature genetics Vol.37 No.3

Several transient receptor potential channels were recently found to be activated by temperature stimuli in vitro. Their physiological and behavioral roles are largely unknown. From a temperature-preference behavior screen of 27,000 Drosophila melanogaster P-insertion mutants, we isolated a gene, named pyrexia (pyx), encoding a new transient receptor potential channel. Pyx was opened by temperatures above 40 °C in Xenopus laevis oocytes and HEK293T cells. It was ubiquitously expressed along the dendrites of a subset of peripheral nervous system neurons and was more permeable to K<SUP>+</SUP> than to Na<SUP>+</SUP>. Although some pyx alleles resulted in abnormal temperature preferences, pyx null flies did not have significantly different temperature preferences than wild-type flies. But 60% of pyx null flies were paralyzed within 3 min of exposure to 40 °C, whereas only 9% of wild-type flies were paralyzed by the same stimulus. From these findings, we propose that the primary in vivo role of Pyx is to protect flies from high-temperature stress.

가중 결합 방식을 이용한 새로운 BOC 상관함수

이영석(Youngseok Lee),이재우(Jaewoo Lee),윤석호(Seokho Yoon),박선(Sun Park),이성로(Seong Ro Lee) 한국통신학회 2013 한국통신학회 학술대회논문집 Vol.2013 No.6

본 논문에서는 가중 결합 방식을 이용한 새로운 이진 옵셋 반송파 (binary offset carrier: BOC) 상관함수를 제안한다. 먼저, 수신 받은 BOC 신호에 대해 하나의 부반송파 펄스를 여러 개의 구형 펄스로 해석하고, 그에 따른 부분상관함수들을 생성한다. 이후 생성된 부분상관함수들 중 일부를 절대값의 합과 차를 이용하여 결합하고, 그 결과를 나머지 부분상관함수들과 가중 결합을 수행하여 주변 첨두가 제거된 새로운 비모호 BOC 상관함수를 생성한다. BOC 코드 추적에 제안한 새로운 비모호 BOC 상관함수를 이용한 경우, 기존의 상관함수들을 이용한 경우들에 비해 더욱 향상된 코드 추적 성능을 가진다는 것을 모의실험을 통해 확인한다.

SIGMA 큐브위성의 비행 소프트웨어 개발

이정호(Jeongho Lee),이성환(Seongwhan Lee),이정규(JungKyu Lee),이효정(Hyojeong Lee),신재혁(Jehyuck Shin),정선영(Seonyeong Jeong),오영석(YoungSeok Oh),진호(Ho Jin) 한국항공우주학회 2016 韓國航空宇宙學會誌 Vol.44 No.4

SIGMA(Scientific cubesat with Instruments for Global Magnetic field and rAdiation) 큐브위성은 근 지구 자기장 세기와 우주 방사선량 측정을 위해 경희대학교에서 개발한 초소형인공위성이다. 우주 임무 수행을 위해 비행 소프트웨어는 위성을 제어하고 데이터를 처리하는 중요한 역할을 담당한다. 본 연구에서는 SIGMA 큐브위성의 임무 수행을 위해 비행소프트웨어를 구현한 것으로서 일반적으로 임베디드 시스템에서 사용하는 실시간 운영체제를 사용하지 않고 단일 프로세스 내에서 모든 태스크를 처리하도록 구현하였다. 이는 SIGMA 큐브위성의 임무 수행 절차와 시스템 제어 방법을 고려한 것으로서 소프트웨어의 오버헤드(overhead)를 낮추고 임무 수행에 집중할 수 있는 효과적인 방법이다. SIGMA(Scientific cubesat with Instruments for Global Magnetic field and rAdiation) CubeSat has been developed for magnetic field measurement of the Earth and space radiation measurement at Kyung Hee university. The flight software plays important roles in controlling the satellite and processing the data in the space mission. In this paper, the Flight Software has been implemented to process all the tasks in the one thread without RTOS(Real Time Operating System). This is an effective mothed not only to concentrate the space mission of CubeSat but also to reduce the overhead of the Flight Software by considering the mission perform procedures and the system control methods.

Application of Audio Watermarking Procedures for Mix Music

Youngseok Lee,Jongweon Kim 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.2

In this paper we applies typical four audio watermarking technologies to protect ownership or copyright of mix music which is combined two or three pre-existing song. In experimental results, applied watermarking technologies cannot be applicable to mix music and three technologies fail to extract watermarks from mix music. This results is from mix music that does not contain full watermark information. Therefore applicable watermarking technology should development for mix music. The common problem of failed technologies cannot extract the second watermark from underlying mix music.

The emerging roles of extracellular vesicles as intercellular messengers in liver physiology and pathology

Youngseok Lee,Jong-Hoon Kim 대한간학회 2022 Clinical and Molecular Hepatology(대한간학회지) Vol.28 No.4

Extracellular vesicles (EVs) are membrane-enclosed particles released from almost all cell types. EVs mediate intercellular communication by delivering their surface and luminal cargoes, including nucleic acids, proteins, and lipids, which reflect the pathophysiological conditions of their cellular origins. Hepatocytes and hepatic non-parenchymal cells utilize EVs to regulate a wide spectrum of biological events inside the liver and transfer them to distant organs through systemic circulation. The liver also receives EVs from multiple organs and integrates these extrahepatic signals that participate in pathophysiological processes. EVs have recently attracted growing attention for their crucial roles in maintaining and regulating hepatic homeostasis. This review summarizes the roles of EVs in intrahepatic and interorgan communications under different pathophysiological conditions of the liver, with a focus on chronic liver diseases including nonalcoholic steatohepatitis, alcoholic hepatitis, viral hepatitis, liver fibrosis, and hepatocellular carcinoma. This review also discusses recent progress for potential therapeutic applications of EVs by targeting or enhancing EV-mediated cellular communication for the treatment of liver diseases.

An Intelligent Course Recommendation System

Youngseok Lee,Jungwon Cho 한국산학기술학회 2011 SmartCR Vol.1 No.1

Previous academic administration management systems had migrated from wired to wireless technology but were restricted to specific equipment, as such systems were not based on industry standards. The course recommendation system plays a significant role in managing the curriculum and counseling students on academic matters, with a view to fostering their academic progress. However, the system does not have the time to advise individual students on the details of which fields and courses they should pursue. The rapid progress of IT technologies has enabled users to access ?any service, anytime, anywhere?, and wireless internet services have enabled users to access internet services even while traveling. Cellular phones have evolved to smart phones, which can provide visual telephone service, DMB service, and act as smartphones. Users can access service categories that offer new possibilities and are accessed and used in ways different from traditional services. Thus, cellular phones are a representative terminal for ubiquitous learning. This paper proposes a mobile course recommendation system to help students choose and access courses necessary for their major fields of study. When students apply to take courses, the proposed system recommends the most suitable ones, using an inference engine that considers not only course sequences but also students? information. The system is able to assist the course coordinator in counseling students. The students use their personal cellular phones to track their courses and receive course recommendations from the system. We searched for relationships between subjects, using association rules, by mining data about the courses already taken by students, and compared these to existing course trees. This information could be used for updating course trees.

Plasma etching of SiO₂ with PFC and HFC precursors of low global warming potentials

Youngseok Lee,Minsu Choi,Chulhee Cho,Wonnyoung Jeong,Inho Seong,Byeongyeop Choi,Sijun Kim,Youbin Seol,Shinjae You,Geunyoung Yeom 한국표면공학회 2023 한국표면공학회 학술발표회 초록집 Vol.2023 No.11-1

Toward scalable internet traffic measurement and analysis with Hadoop

Lee, Yeonhee,Lee, Youngseok Association for Computing Machinery 2013 Computer communication review Vol.43 No.1

MP3 File Identification Based on Concurrence Order of Metadata

Lee, Youngseok,Kim, Jongweon Global Vision School Publication 2014 International Journal of Multimedia and Ubiquitous Vol.9 No.9