클라우드 서비스 수준 별 권한 분배를 지원하는 구조 및 방법

정수민,박준석,염근혁,박태호 한국차세대컴퓨팅학회 2024 한국차세대컴퓨팅학회 논문지 Vol.20 No.2

클라우드 컴퓨팅은 IT 서비스를 구성, 배포, 운영하기 위한 기반 기술로 다양한 이해관계자(개발자, 플랫폼 운영자, 고객 등)를 대상으로 제공된다. 이해관계자들이 클라우드 플랫폼을 활용하는데 리소스 충돌 및 데이터 침해를 방지하기 위해 플랫폼은 이해관계자들에게 특정 범위의 리소스를 제어할 수 있는 권한을 RBAC(Role Based Access Control)와 같은 기술을 통해 제공한다. 그러나, 현재 활용되는 권한 분배 기술들은 서로 다른 클라우드 플랫폼에서 상이한 이해관계자 구분과 제공하는 역할 범위의 차이점으로 인해 공통된 적용 방안을 찾기 힘들다는 문제점이 있다. 따라서, 본 논문에서는 권한 분배 구조의 분석을 통해 서로 다른 클라우드 플랫폼에 적용 가능한 리소스 단계의 확장을 지원하는 수준별 권한 분배 구조 및 방법을 제안한다. 제안 방법을 구현한 사례연구를 수행하여 방법의 적용 가능성을 검증하였다. 오픈소스 클라우드 플랫폼 및 관련 연구들과의 비교 분석을 통해 제안한 권한 분배 방법이 기존 방법보다 권한 분배 범위가 확장되고 역할 범위가 세분화된 것을 확인하였다. 본 논문에서 제안한 방법은 멀티 클라우드 환경에서 권한을 분배하기 위한 기반 모델로 적용될 수 있다. 또한 기존 환경에서 지원하지 않는 세분화된 권한 분배를 지원하여 클라우드 역할의 유연성을 높이고, 권한의 확장성을 보장하는 방안으로 활용 가능하다. Cloud computing is a base technology for configuring, distributing, and operating IT services that is provided to various stakeholders(developers, platform operators, customers, etc.). To prevent resource conflicts and data breaches when stakeholders use the cloud platform, the platform provides stakeholders with the authority to control a specific range of resources through technologies such as RBAC (Role Based Access Control). However, the currently used authority distribution technologies have a problem that it is difficult to find a common application approach on different cloud platforms due to different stakeholders and differences in the scope of roles provided. Therefore, in this paper, through analysis of the authority distribution architecture, we propose a level-specific authority distribution architecture and method that is applicable to different cloud platforms and supports expansion of the resource level. By applying the proposed method, we verify the feasibility of implementing the method based on a conducted case study. Through comparative analysis with open source cloud platforms and related researches, it was confirmed that the proposed authority distribution method expanded the scope of authority distribution and further refined the scope of roles compared to the existing method. The proposed method in this paper can be applied as a base model for distributing authority in a multi-cloud environment. In addition, it can be used as a way to increase the flexibility of cloud roles and ensure scalability of rights by supporting authority distribution of rights that is not supported in the existing environment.

SHB Progenitor Life Time & Three Classes of GRB

정수민,이창환 한국천문학회 2007 天文學會報 Vol.32 No.2

AI 기반의 클라우드 인스턴스 마이그레이션을 위한 학습 피처 모델

정수민,박준석,염근혁 한국차세대컴퓨팅학회 2023 한국차세대컴퓨팅학회 논문지 Vol.19 No.1

In the cloud computing field, cloud migration is recognized as important technology. Currently, cloud computing infrastructure is attempting to build an SDI(Software-Defined Infrastructure) environment based on the paradigm called AIaaS(AI-as-a-Service). Furthermore, when applying migration, a pattern-based or resource-based method is emerging. However, research on identifying migration features that are the basis of such methods and using them for learning is insufficient. Therefore, in this paper, we identified migration features for cloud computing. In addition, the architecture and process for performing migration by adapting the identified features are presented. A case study of learning and applying some of the migration features from a previously published data set was conducted. The proposed model will be applicable as a base feature model for learning when performing AI-based migration in the cloud computing field. 클라우드 컴퓨팅 분야에서 마이그레이션 기술의 중요성이 부각되고 있다. 현재 클라우드 컴퓨팅 인프라는 AIaaS(AI as a Service)라는 패러다임 하에 클라우드 컴퓨팅의 SDI(Software-Defined Infrastructure)환경을 구축하려는 시도가 진행되고 있다. 현재 마이그레이션을 적용 시 패턴 기반, 리소스 기반으로 수행하고자 하는 기법이 등장하고 있다. 하지만, 이와 같은 기법에 근간이 되는 마이그레이션 피처를 식별하고 이를 학습에 활용하는 연구는 미비한 실정이다. 따라서, 본 논문에서는 클라우드 컴퓨팅 마이그레이션 학습 피처들을 식별하였다. 또한, 해당 피처를 접목하여 마이그레이션을 수행하는 아키텍처 및 프로세스를 제시하였다. 실제 마이그레이션 피처 중 일부를 기 공개된 데이터 세트를 통해 학습하고 적용하는 사례연구를 수행하였다. 제안한 모델은 클라우드 분야에서 AI 기반의 마이그레이션을 수행 시 학습 적용을 위한 피처 모델로 활용 가능할 것이다.

회계학

정수민 회경사 2007 月刊 會計 Vol.15 No.3

회계학

정수민 회경사 2007 月刊 會計 Vol.15 No.4

Telescope with using MEMS mirror for detecting Gamma Ray burst

정수민,남신우,박일흥,박재형,이직,이창환 한국천문학회 2008 天文學會報 Vol.33 No.1

Local Rate of Short-hard Gamma-ray Bursts and Their Progenitor Lifetimes

정수민,이창환 한국물리학회 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.56 No.5

Gamma-ray bursts have been divided into two classes, long-soft gamma-ray bursts (L-GRBs) and short-hard gamma-ray bursts (SHBs) according to the bimodal distribution in the duration time. Due to the harder spectrum and the lack of afterglows of short-hard bursts in optical and radio observations, different progenitors for short-hard bursts and long-soft bursts have been suggested. Based on the X-ray afterglow observation and the cumulative red-shift distribution of short-hard bursts, Nakar et al. (2006) found that the progenitors of short-hard bursts are consistent with old populations, such as mergers of binary neutron stars. Recently, the existence of two subclasses in long-soft bursts has been suggested after considering multiple characteristics of gamma-ray bursts,including fluences and duration times. In this work, we extended the analysis of the cumulative redshift distribution to two possible subclasses in L-GRBs. We found that two possible subclass GRBs show different red-shift distributions, especially for red-shifts z > 1. Our results indicate that the accumulative red-shift distribution can be used as a tool to constrain the progenitor characteristics of possible subclasses in L-GRBs.

고등학교 『한국사』 교과서의 학습자료 분석과 활용 방안-대단원 ‘Ⅷ. 냉전체제와 대한민국 정부의 수립’을 중심으로-

정수민 역사교육학회 2011 역사교육논집 Vol.47 No.-

This thesis suggested a method to analyze and utilize the learning materials of the『Korean history』textbook of high school used in the school field since Mar. 2011. When the『Korean history』textbook is carefully analyzed, it will be helpful and referred to created a textbook according to a new curriculum in the future and the effects of efficient textbook utilization are expected. In Chapter I, the importance of a teaching material in history class, in particular, the importance of a textbook was examined. In Chapter II, the 2009 revised curriculum and the characteristics of the『Korean history』textbook were analyzed. The『Korean history』textbook revised in 2009 reduced and adjusted the recent and modern parts from the『Korean history』textbook revised in 2007 and the two units corresponding to the premodern were added. In addition, the revolution from classifier to general history is the biggest characteristics. The『Korean history』textbook has a positive aspect to collect various data which can improve historical inquiry power, imagination and judgment. Various data which raise practical utilization as well as consider student’s interest have been reinforced. Chronological tables and maps are located in in-depth learning and introduction parts for higher utilization and the sizes and composition of suggested data became diverse and it is analyzed that it developed in creativity of design compared to the existing textbooks. In Chapter III, the learning materials suggested in the textbook large size unit III of the『Korean history』textbook were divided to literal materials and non-text materials for analysis and examination. The ratio occupied by non-text materials among the whole learning materials suggested in textbook Unit VIII of the『Korean history』textbook was 69% and in particular, the ratio occupied by pictures and drawings was high. When it comes to the characteristics of the modern history, because pictures still exist a lot, it is analyzed that pictures and drawings are suggested abundantly. Samhwa and Cheonjae include much more pictures compared to other textbooks. However, when pictures and drawings are compared, drawings were smaller relatively but original materials such as ‘Massacre in Korea’ suggested by Mirae and Cheonjae could be found. In general, maps are a few and mostly related to the Korea War. Chronological tables of Samhwa and Cheonjae placed horizontal chronological tables in each middle size unit or repeatedly suggested chronological tables of overlapped times to raise utilization and Samhwa and Jihak suggested relatively many tables and graphs. Reading materials are the biggest parts among literal materials regardless of publishers and Mirae and Samhwa arranged relatively less wing writings. But, the inquiry data in which student’s activities and postscripts are suggested are provided with various types in all of 6 type textbooks so that it is expected to help improve historical thinking power. Chapter IV suggested character inquiry learning and discussion learning and historical newspaper production learning as a utilization method of textbook learning materials which can enable positive activities of students. Even though a textbooks is not perfect, through recomposition of contents and materials, teachers can find various methods for improvement of student’s historical inquiry power and fill up the insufficient parts of the textbook. Agony and efforts of teachers can fill up the insufficient parts of a textbook and bring quality improvement of history class. For this, teachers should put their endless efforts for much better history class such as recomposition of teaching and learning methods and materials and contents.

The Slewing Mirror Telescope of the Ultra Fast Flash Observatory Pathfinder

정수민,최지녕,정애라,김민빈,김석환,김예원,김지은,이직,임희진,나고운,남지우,박일흥,서정은,Jeong, Soomin,Choi, Ji Nyeong,Jung, Aera,Kim, Min Bin,Kim, Sug-Whan,Kim, Ye Won,Kim, Jieun,Lee, Jik,Lim, Heuijin,Na, Go Woon,Nam, Jiwoo,Park, Il Hung 한국천문학회 2012 天文學會報 Vol.37 No.2

The Slewing Mirror Telescope (SMT) is a key telescope of Ultra-Fast Flash Observatory (UFFO) space project to explore the first sub-minute or sub-seconds early photons from the Gamma Ray Bursts (GRBs) afterglows. The first realization of UFFO is the 20kg UFFO-Pathfinder (UFFO-P) to be launched on board the Russian Lomonosov satellite in 2013 by the Soyuz-2 rocket. Once the UFFO Burst Alert & Trigger Telescope (UBAT) detects the GRBs, Slewing mirror (SM) will rotate to bring the GRB into the SMT's field of view instead of slewing the entire spacecraft. SMT can image the UV/Optical counterpart with about 4-arcsec accuracy. However it will provide a important understanding of the GRB mechanism by measuring the sub-minute optical photons from GRBs. SMT can respond to the trigger over $35^{\circ}{\times}35^{\circ}$ wide field of view within 1 sec by using Slewing Mirror Stage (SMS). SMT has 10-cm Ritchey-Chretien telescope and $256{\times}256$ pixilated Intensified Charge-Coupled Device (ICCD) on focal plane. In this paper, we discuss the overall design of UFFO-P SMT instrument and payloads development status.

A rare case of right-sided Native Valve Infective Endocarditis with multiple cerebral infarctions

정수민,선병주,김아람 대한내과학회 2023 대한내과학회 추계학술대회 Vol.2023 No.2