WLAN에서 RA 수신방식 개선을 통한 mSCTP 핸드오버 성능 향상

최순원 고려대학교 대학원 2006 국내석사

mSCTP(Mobile SCTP)는 SCTP(Stream Control Transmission Protocol)와 DAR (Dynamic Address Reconfiguration)을 이용해 트랜스포트 계층에서 이동성을 제공하기 위해 최근에 제안된 프로토콜이다. mSCTP의 가장 문제점은 핸드오버 지연시간(Handover Latency)이 길어 실시간 어플리케이션에 적합하지 못하며 핸드오버 시점을 결정(Handover Decision)하는 명시적인 방법이 없다는 것이다. 이를 해결하기 위해 본 논문에서는 RA (Router Advertisement)를 미리 수신함으로써 핸드오버 지연시간을 최소화 하는 방법을 제안하고자 한다. 또한, RA를 빠르게 얻을 수 있는 방법으로, RA 캐시(Cache)를 이용한 방법, FMIPv6(Fast Handovers for Mobile IPv6)와 연동을 통한 방법, 듀얼 인터페이스(Dual Interface)를 이용한 방법 등 세가지를 소개하고 하고자 한다. 마지막으로, 제안된 방안의 성능 향상을 실제 확인 하기 위해 세가지 방식 중 FMIPv6와의 연동 방식을 리눅스 환경에서 테스트 베드를 구성하여 핸드오버 성능을 측정하였다. 실험한 결과 전체 핸드오버 지연시간의 대부분은 RA를 받는데 있음을 확인 할 수 있었고, 이를 줄임으로써 전체 핸드오버 성능을 크게 향상시킬 수 있었다. The SCTP (Stream Control Transmission Protocol) implementation with the DAR (Dynamic Address Reconfiguration) extension is called the mSCTP (Mobile SCTP) that is proposed recently for mobility support in transport layer. The mSCTP does not satisfy short handover latency for real-time applications and it has no specific handover decision mechanisms. In this paper, we propose fast handover schemes for mobile nodes that are moving into different subnet using pre-acquisition RA (Router Advertisement) and L3 trigger for improving handover performance. Furthermore, we introduce three specific methods which are RA cache, FMIPv6 (Fast Handovers for Mobile IPv6) and dual interface and how proposed scheme can be interoperated with handover process respectively. Finally, we show two experimental results which are the mSCTP and the mSCTP using FMIPv6 on Linux platforms. Experimental results show that handover performance is improved with reducing the time of receiving RA which takes most of total handover latency.

직업군인 복지제도의 개선방안에 관한 연구

최순원 조선대학교 정책대학원 2013 국내석사

Abstract A Study on Method of Improving Welfare System for Professional Soldiers Choi, Soon-won Advisor : Prof. Kim, Yong-seob. Ph.D. Department of Social Welfare, Graduate School of Policy, Chosun University In the 21st century, it is not only becoming an information age, but also high technology and scientific age which lead us to entering the new war paradigm, The foundation of ROK(Republic of Korea) army became over 60th anniversary. ROK Army are making an effort to promote strong forces to achieve peaceful unification while we are conflicting with our brothers as enemy like The Cheonan Guard Ship attack and Yeongpyung provocation. prevention plans are needed and such tragic things should never happen again. Recently, the National Defense Reform 2020 plan was established to reform the army. Strong defense capabilities built strongly and firmly are indispensable to the basic foundation of motive for reforming. These foundation is the most important to keep the capable officers as Professinal Soldier. Solider is the job that they put their sacrifices and their lives for country in emergency. For the solider, Military welfare level is standard to measure the life quality and it is required to be beyond the social average welfare. Soldiers’ welfare didn’t fall more behind than social welfare until in 1970. after rapid modernization, it made the huge economical effect in 1980‘s, it changed slightly. National interest for Military had declined during cold days on 1980’ and military welfare fell more behind relatively than social welfare which was based on economical outcome. Naturally, we can’t deny the truth that Military welfare did not catch the speed of Social Welfare. For these reasons, whole Military strength and morale are declining so that brilliant people are evading military duty and losing attraction. Therefore, I deduce the problems and I try to improve the plans based on comparing the Current welfare policy and system. For these problems, these relevant facts were analyzed for this study. There are 5 fields of study ; setting conditions for the policies, payment, resident support, welfare facilities, education support for children, support for changing jobs. First of all, the present condition of each field is analyzed, and the improvement way is deduced. As a result, I come to conclusions that public agreement is required for the conduciveness to such policies, the salary must be reflected realistically based on military particularity, the houses must be built on the concept of complex welfare town based on built-in system, the Welfare facilities must continue to be expanded by purchasing private condominiums and improving welfare halls and post exchanges which need adjusting to modern standards, for children’s education of military officers it is necessary to admit exemption admission and build much more boarding houses in Seoul area, during the job changing period the chances of using each individual’s specialty must be given even more for which more jobs are needed and the job changing education and training is needed for more than 12 months as well. Defending a country is not just military. Modern wars are all our ones, for this reason, we have to draw many experts of a variety of fields by making them have interest in military, for which most importantly, we have to have good welfare. The welfare of professional soldiers is not making rich, benefitted military but keeping good conditions under which soldiers can devote to defending a country.

육군간부 학습민첩성의 선행변인과 결과변인에 관한 연구 : 개인특성, 직무특성, 조직특성, 학습몰입리더십 및 혁신행동 간의 관계를 중심으로

최순원 忠南大學校 大學院 2021 국내박사

4차 산업혁명 시대에 새로운 환경의 변화에 유연하게 대처하기 위해 새로운 사고 및 행동방식의 빠른 습득이 요구되고, ‘지식의 반감기’로 지식이 폐기되는데 걸리는 시간이 짧아지기 때문에 학습민첩성은 최근에 더 주목을 받게 되었다. 육군비전 2050에서 우리 군은 미래 육군을 위한 역량으로 기민성(agility) 등 5가지를 제시하였고, 리더십 모형에서도 기민한(agile) 작전수행 분야에서 정신적 민첩성(mental agility)을 강조하며 학습민첩성의 초기개념을 일부 차용하였지만, 현재의 발전된 개념을 적용하고 있지는 못하는 듯하다. 미래 전장에서 ‘시간과 공간을 주도하는 초일류 육군’을 육성하는데 기여하기 위해, 학습민첩성에 대한 선행 및 결과변인, 그리고 조절변인을 연구하였다. 학습민첩성이 초래하는 결과가 긍정적이라면 그 필요성이 증명될 것이고, 학습민첩성에 영향을 주거나 조절하는 요인은 학습민첩성의 향상방안을 시사해 줄 것이기 때문이다. 먼저, 지금까지 연구된 이론과 선행연구를 망라하여, 학습민첩성 개념과 모델, 측정도구, 변인으로 나누어 살펴보았고, 특히 변인은 선행, 결과, 조절변인으로 분류하여 고찰하였다. 그 결과 세 가지 선행변인(직무특성, 개인특성, 조직특성)과 결과변인(혁신행동), 조절변인(직속상관의 학습몰입리더십)을 도출한 후 10개의 연구가설과 3개의 연구모형 및 56개의 진단문항을 선정하였다. 학습민첩성의 개념모형과 진단문항은 기존의 다차원적 접근과 단차원적 접근의 논란을 해소할 수 있도록 맥락적으로 접근하여 개발한 박정열(2019)의 것을 사용하였다. 예비조사는 ‘20년 5월 군 장병 126명을 대상으로 실시하여, 군인들의 이해가 어려운 20개 문항을 검토하여 보완하였고, 조사대상은 군에 대해 이해가 깊은 5년차 이상 전투병과 위주의 장교와 부사관으로 선정하였다. 본조사는 431명을 대상으로 ‘20년 8월 한달간 설문지를 배부하고 회수하였으며, 불성실한 답변자 6명을 제외하고 425명을 대상으로 분석하였다. 자료분석을 위해 기술통계분석을 시행한 후, 구조방정식 모델의 2단계 모형추정 가능 절차를 실시하였다. χ2(CMIN), TLI, CFI, SRMR 및 RMSEA 지수로 측정모형의 적합도를 확인하고, 수렴 및 판별타당도를 검증한 후 구조모형의 적합도를 확인하였다. 마지막으로 Baron & Kenny(1986)의 방법을 이용하여 위계적 회귀분석을 실시하여 조절효과를 검증하였다. 연구결과는 다음과 같다. 첫 번째, 학습민첩성은 혁신행동에 정적인 영향을 미치었으나, 학습몰입리더십의 조절효과는 없었다. 두번째, 개인특성 중 경험개방성, 학습목표지향성은 학습민첩성을 매개로 혁신행동에 정적인 영향을 주었으나, 여기에서 조절효과는 유의하지 않았다. 세번째, 직무특성 중 직무자율성과 직무도전성은 학습민첩성을 매개로 혁신행동에 정적인 영향을 주었다. 네번째, 조직특성 중 정보체계는 학습민첩성을 매개로 혁신행동에 정적인 영향을 주었으며, 여기에서 상사의 학습몰입리더십은 조절효과가 확인되었다. 본 연구의 학문적 의의는 학습민첩성을 육군에 처음 적용하여 실증연구를 하였고, 10개의 선행변인을 3개의 연구모형에 투입하여 종합적이고 세부적으로 분석하였으며, 박정열(2019)의 진단도구를 검증해 보았다는 것이다. 실무적 시사점은 육군은 미래 전장에 대비하기 위한 역량으로서 학습민첩성을 도입하여야 하고, 학습목표지향적인고 개방적인 열린 육군(Open Army)의 문화를 구축하며, 육군의 리더들은 긍정적인 실책관리문화를 바탕으로 성과보다는 직무에 대한 학습에 가치를 두도록 이끌어야 한다는 것이다. 이번 연구의 한계점과 그에 따른 후속연구 제안은 다음과 같다. 첫 번째, 자기보고식 설문의 한계를 극복하기 위해 학습민첩성의 결과변인을 객관적으로 측정할 수 있도록 360도 평가 등을 적용해 볼 필요가 있다. 둘째 장교와 부사관 신분 외에 군무원과 병 신분으로 연구대상을 확대하여 한다. 셋째 횡단적 연구의 특성을 극복하는 종단연구가 필요하며 마지막으로 학습민첩성의 하위요인까지 세분화해서 선행변인이 학습민첩성을 중심으로 매개되고 조절되어 작동하는 알고리즘에 대한 연구를 제안한다. In the era of the 4th industrial revolution, in order to flexibly respond to changes in the new environment, it is essential to quickly learn new ways of thinking and action. Due to the increasingly shortened useful lifetime of knowledge, learning agility has been receiving more attention in recent times. Agility is one of the five suggestions of the Korean military's Army Vision 2050, and mental agility is also emphasized in the leadership model for carrying out operations. However, it seems that the most advanced and current concepts are not being applied. In order to foster a first class army that controls time and space in the battlefield, research on learning agility is necessary and its antecedent, moderator and result variables should be examined. If the results of learning agility are positive, its necessity will be proved, and finding a factor that influences or moderates learning agility will suggest ways of improvement. First, covering existing theories and studies, concepts and models of learning agility, measurement tools, and variables were examined separately. In particular, variables were classified into precedence, outcome, and moderator variables. As a result, three precedence variables (job characteristics, personal characteristics, organization characteristics), one outcome variables (innovative behavior), and one moderator variables (supervisor's learning commitment leadershi) were derived. Afterward, a preliminary survey was conducted upon selecting hypotheses, research models. The conceptual model of learning and the diagnosis questions were developed by Park, Jeongyoul & Kim, Jinmo(2019) who utilized a contextual approach to resolve the controversy between existing multi-dimensional and single-dimensional approaches. The pilot survey was conducted on 126 military personnel on May 20th. The respondents identified 20 questions that were difficult to understand and revisions were made accordingly. Regarding the subject of participants, officers and soldiers with less than 5 years of experience were excluded as were non-combatant military classes with support-orientated roles and less influence. The main survey was conducted on 431 officers and non-commissioned officers with more than 5 years of experience, who received and completed a questionnaire during August, 2020. In total, 425 answers were analyzed, with six excluded for unscrupulous respondents. For data analysis, a descriptive statistical analysis was performed. Afterward, to verify the merriment model, a two-stage model estimation procedure of the structural equation model was conducted to evaluate the conceptual validity in parallel, and the for of the measurement model was comprehensively confirmed by x2 (CMIN), TLI, CFI, SRMR, and RMSEA index. Sequentially, the convergence validity and discriminant validity were checked, and final modifications for the structural model were made. Then, the integrity of the structural model was verified, the influence relationship between each variable was confirmed (p < .05) and the moderating effect was verified. The research results are as follows. First, learning agility had a positive effect on innovative behavior, but there was no moderating effect of learning commitment leadership. Second, in the first research model, openness to experience and learning goal orientation among individual characteristics had a positive effect on innovative behavior through learning agility, and the positive error management culture adjusted the effect of openness to experience on learning agility. Third, In the second study model, among job characteristics, job autonomy and job challenge had a positive effect on innovative behavior through learning agility, but the moderating effect of supervisor's learning commitment leadership was not significant. Fourth, In the third research model, among the organizational characteristics, the information system had a positive effect on innovative behavior through learning agility, and the supervisor's learning immersion leadership adjusted the effect of the information system on learning agility. Fifth, all three leading variables that were expected to affect learning agility partially affected it. The order of influence was personal characteristics (learning goal orientation 0.327> openness to experience 0.231)> organizational characteristics (information system 0.126)> job characteristics (job autonomy 0.118)> individual characteristics (commitment to change 0.110). In other words, in order to increase learning agility, individuals must value learning, not performance, and be open to various experiences, and an information system that can detect changes must exist and operate in the organization. It means that more authority should be given to the individuals, who should think positively and actively accept organizational change. The limitations of this study and suggestions for subsequent studies are as follows. First, when the learning agility diagnostic tool of Park, Jeongyeol & Kim, Jinmo (2019) was applied to the group, it was found that the diagnostic items in the "experimental application" stage were extracted as the same factors as the "strategic search" items, which would hinder discriminant validity. This diagnostic tool was expected to be able to end the long debate on learning agility by analyzing it's underlying theory and approaching it in context. However, it is necessary to be used and analyzed in various types of organizations including the military. This diagnostic tool was expected to be able to end the long debate on learning agility by analyzing it's underlying theory and approaching it in context. However, it is necessary to be used and analyzed in various types of organizations including the military. In this study, additional research on diagnostic questions as the items in the "strategic search" stage did not fully meet the standard value for mean variance extraction. Second, in the process of verifying the structural model in which job characteristics influence the innovative behavior through learning sensitivity as a medium, the error terms of the two items of job autonomy were covariance-connected. In order to satisfy the model suitability, it was a logical connection for a revised index. Even so there may be additional problems with the independence of the two measurement items or there may be matters for further improvement regarding the causal relationship of the structural model with job characteristics as a preceding factor. Third, contrary to expectations, the supervisor's learning immersion leadership did not show any significant moderating effects in the relationship between the expected preceding variable and learning agility, and also between learning agility and innovative behavior. The supervisor's learning immersion leadership means "the supervisor leading members in additional learning necessary for their jobs". Thus, instead of adhering to the outdated ways of the past, learning immersion leadership should embrace new changes by responding quickly and flexibly.

PowerSim: 하드웨어 가속 모듈을 활용한 HW/SW 통합 고성능 FTL 설계 환경 구축

최순원 서울대학교 대학원 2023 국내석사

다양한 컴퓨터 시스템에서 저장 장치로 사용되는 SSD(Solid-State Drive)의 성능은 호스트 인터페이스의 개선, 채널/칩 대역폭 증가와 같은 다양한 최적화 연구를 통해 꾸준히 증가해오고 있다. 최신 SSD의 고성능 FTL의 기능을 수행하기 위해서 전통적인 소프트웨어 중심 FTL 설계에서는 보다 강력하고 많은 코어를 사용해야만 성능 요구조건에 부합할 수 있다. 하지만 이러한 방식은 과도한 전력소모를 발생시키는 문제점이 존재한다. 성능과 전력 요구조건을 모두 만족시키기 위해 임계 경로(Critical Path)에 대한 하드웨어 가속이 많이 이루어지고 있는 추세이다. 성능과 전력에 이점이 존재하지만 높은 개발비용과 구현 복잡도를 가지는 하드웨어 설계와 유연성을 통해 다양한 알고리즘 구현이 가능한 소프트웨어 설계의 장단점을 적절히 결합한 통합 설계가 필요하다. 본 논문에서는 하드웨어 가속 모듈을 이용하여 고성능 FTL을 위한 하드웨어/소프트웨어 통합 설계와 전력 모델을 고려한 PowerSim 시뮬레이터를 제안한다. SSD 컨트롤러를 설계하는데 있어 소프트웨어 설계의 경우 코어의 수와 코어 스펙, 하드웨어 설계의 경우 하드웨어 가속 유무와 하드웨어 가속 모듈의 수를 설정하여 다양한 하드웨어/소프트웨어 통합 설계 및 평가가 가능하다. 제안하는 하드웨어/소프트웨어 통합 설계를 위해 멀티큐 SSD 시뮬레이터인 MQSim을 확장하여 시뮬레이션 도구를 구현하였다. PowerSim의 효용성을 검증하기 위해 고성능 FTL을 가지는 최신 삼성 PM9A3 960GB SSD와 동일하게 낸드 플래시를 구성하고 전력 요구조건을 설정하였다. PowerSim을 통해 다양한 하드웨어/소프트웨어 통합 SSD 컨트롤러를 구성하고 실험하였으며, 설계한 컨트롤러에 대한 성능 및 전력을 평가하였다. 요구조건을 만족하는 다양한 컨트롤러를 제시함으로써 제조사는 클라이언트의 요구조건과 제조사의 상황에 맞는 SSD 컨트롤러 탐색이 가능하다. The performance of Solid-State Drives (SSDs), which are widely used as storage devices in various computer systems, has been steadily increasing through various optimization studies such as improvements in host interfaces and increasing channel/chip bandwidth. To achieve the high-performance functionality of modern SSDs, traditional software-centric Flash Translation Layer (FTL) designs require more powerful and numerous cores to meet performance requirements. However, this approach presents the problem of excessive power consumption. To satisfy both performance and power requirements, there is a growing trend of hardware acceleration for critical paths. While hardware designs offer advantages in performance and power, they come with higher development costs and implementation complexities. Therefore, an integrated design that combines the strengths and weaknesses of hardware designs with high flexibility for implementing various algorithms in software designs is necessary. This thesis proposes a hardware/software co-design for high-performance FTL, utilizing hardware acceleration modules and introducing the PowerSim simulator, which considers power models. For software design of the SSD controller, it allows the configuration of the number of cores and core specifications, while for hardware design, it enables the setting of hardware acceleration availability and the number of hardware acceleration modules, facilitating various hardware/software co-designs and evaluations. To implement the proposed hardware/software co-design, we extend the MQSim simulator, a multi-queue SSD simulator, and develop a simulation tool. We configure the NAND flash similarly to the latest Samsung PM9A3 960GB SSD with high-performance FTL and set power requirements to validate the effectiveness of PowerSim. Through PowerSim, we construct and experiment with various hardware/software integrated SSD controllers, evaluating their performance and power consumption. By presenting diverse controllers that meet the requirements, manufacturers can explore SSD controller designs that align with client demands and their own circumstances.

「李春風傳」의 硏究 : 能動的 女性人物을 中心으로

최순원 忠南大學校 1996 국내석사

속초 신흥사 목조지장보살삼존상의 채색기법 및 안료 연구

최순원 공주대학교 문화유산대학원 2016 국내석사

Identification of specific cytokines in dogs with acute pancreatitis

최순원 Kangwon National University 2018 국내석사

급성 췌장염은 일반적으로 개에서 췌장과 다른 조직에 다양한 정도의 영향을 미치는 급성 염증 과정이다. 하지만, 이 질환의 뚜렷한 병리기전은 아직 밝혀지지 않았다. 사이토카인이 면역과 염증반응을 매개, 통제하는 것으로 추정된다. 사이토카인과 염증 그리고 신체적응반응에는 복합적인 상호작용이 존재한다. 이번 연구는 건강한 개와 급성 췌장염을 일으키는 개 사이에서 혈청 사이토카인의 농도를 비교 하는 것으로 설계 되었다. 개에서 사이토카인 항체 분석 실험은 3마리의 건강한 개와 3마리의 급성췌장염에 이환 된 개에서 이루어 졌다. 이 결과 IL-2, IL6, IL-10 GM-CSF 그리고 TNF-α는 두 그룹 사이에 유의적인 차이를 보이지 않았다. 이와는 대조적으로 IL-8 (p = 0.0002) MCP-1 (p = 0.0009), RAGE (p = 0.0062) , SCF (p = 0.0215) 그리고 VEGF (p = 0.0420)는 건강한 개체 그룹과 급성췌장염에 이환된 개체 그룹 간에 유의적인 차이를 보였다. 면역 효소면역분석 법으로 건강한 개체 8마리와, 급성 췌장염에 이환된 개체 8마리에 있어서 IL-8, MCP-1, RAGE, SCF에 대해 차이를 확인하는 실험을 진행 하였다. 이 결과 IL-8 (p<0.0001), MCP-1 (p < 0.0001), RAGE (p = 0.0080)그리고 SCF (p = 0.0096)는 모두 두 그룹간에 유의적인 차이를 보였다. 이번 연구 결과, MCP-1, RAGE와 SCF는 급성 췌장염의 진단에 있어, 새로운 추천 인자로 생각 되어진다. 이번 연구는 대조군과 비교하여 급성췌장염의 병리기전에 사이토카인이 밀접한 관련이 있음을 검증하였다. Acute pancreatitis (AP) is an acute inflammatory process in the pancreas with various degree of involvement in other tissues that is common in dogs. However, the mechanism of the disease initiation is still unknown. It is believed that the cytokines mediate and control these immune and inflammatory responses. The current study was designed to compare cytokines between healthy dogs and dogs with acute pancreatitis. The first study identified specific cytokines in dogs with acute pancreatitis by the canine cytokine array. For the canine cytokine array, three healthy dogs and three dogs with acute pancreatitis were included. Based on the results, IL-8 (p = 0.035), MCP-1 (p = 0.0138), RAGE (p = 0.0079), and SCF (p = 0.034) were significantly increased in dogs with acute pancreatitis. Conversely, IL-2, IL-6, IL-10, GM-CSF, and TNF-α were not detected in healthy dogs and the dogs with acute pancreatitis. However, VEGF (p=0.6971) was not significantly different between healthy dogs and the dogs with acute pancreatitis. The second study reanalyzed the cytokines with enzyme-linked immunosorbent assay (ELISA), (IL-8, MCP-1, RAGE and SCF) that were significantly different in the first study. For the canine serum ELISA, eight healthy dogs and eight dogs with acute pancreatitis were included. Based on results, IL-8 (p < 0.0001), MCP-1 (p < 0.0001), RAGE (p = 0.006) and SCF (p = 0.0002) were all significantly different in dogs with acute pancreatitis. Based on the results of this study, MCP-1, RAGE and SCF are newly suggested factors in dogs with acute pancreatitis. Moreover, this study demonstrated that cytokines involved in the pathogenesis of acute pancreatitis differed from those found in healthy dogs.

Identification of specific cytokines in dogs with acute pancreatitis

Choi, Soon won Kangwon National University 2018 국내석사