서버 기반의 클라우드 컴퓨팅 보안에 관한 연구

박문순, 조인준 배재대학교 공학연구소 2019 공학논문집 Vol.21 No.1

Recently, the need for research by IOT, Green Energy, and USN has increased with public institutions, research institutes, large corporations and other research institutes, and the building and introduction of infrastructure systems to support them. In addition, hardware configuration such as server computing deployment is a prerequisite because the configuration of cloud systems and cloud systems offered by global IT firms such as Oracle, Amazon, and Microsoft is based on physical hardware and servers. In this new environment, server-based cloud computing environments, the threats also increase proportionally. These are the security threats that attack and steal information from users without their consent, such as cyberattacks, or hacking. In addition, more and more cases are attacking server computing and requiring money by encrypting important data from users, such as Lansomware, which has become a hot topic these days. In this case, there are many cases where complete restores are not achieved. Thus, in this paper, we will study how to provide security services in a server-based computing environment. Analyze the factors that could threaten the security of your data, from your data to the data stored on the server, throughout the process of configuring cloud computing in a server environment to serving end-client users. It also proposed ways to deliver services in an optimal security environment for threats. 최근 공공기관, 연구소, 대기업 등 연구기관을 중심으로 IOT, 그린에너지, USN의 연구에 대한 필요성이 증가하면서 이를 지원하기 위한 기반시스템들의 구축 및 도입율도 함께 증가하고 있다. 또한 오라클, 아마존, 마이크로소프트사와 같은 세계적인 IT기업에서 제공하는 클라우드 시스템, 네이버, 구글과 같은 포털서비스사에서 제공되는 가상화 및 클라우드 시스템구성도 물리적 하드웨어 및 서버들을 기반으로 제공하기 때문에 서버 컴퓨팅 구축과 같은 하드웨어 구성은 필수 요소 조건이라 할 수 있다. 이러한 새로운 환경의 서버기반의 클라우드 컴퓨팅환경에서는 이를 위협하는 요소들도 비례하여 증가한다. 이런 요소들이 사이버 공격 즉, 해킹과 같이 사용자의 정보 및 데이터들을 본래의 사용자의 동의 없이 불특정 다수를 향해 공격하고 정보를 빼앗아 가는 보안위협 요소들이다. 또한 요즘 화두 되고 있는 랜섬웨어와 같이 서버 컴퓨팅을 공격하고 사용자의 중요데이터를 암호화하여 금전을 요구하는 사례도 증가하고 있다. 이 경우 완벽한 복원이 이루어지지 않는 경우도 대다수 존재한다. 이에 본 논문에서는 서버기반의 컴퓨팅 환경에서의 보안 서비스 제공방안을 제안하였다. 이를 위해 서버환경에서 클라우드 컴퓨팅을 구성하여 최종 클라이언트 사용자에게 서비스를 제공하는 모든 단계 에 걸쳐 보안위협 요소들을 분석하였다. 분석된 보안위협 요소들에 대해 최적의 보안서비스 제공방안을 제안하였다.

스포츠 레크리에이션의 행정학 및 경제학적 분석

육조영,문행자,이길민,이우재 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.2

To the recent days, monetary aspect of sports and recreations were viewed as negative. If someone mentioned about relationship between sports and money, it was regarded as taboo and prohibited. But, the economical development and well-being environments enable specialists to mention it. It is necessary that economical and commercial analysis about sports industry will be performed with a great number of analysis tools. Because of huge growing speed of sports industry in ROK, several branches are made from this sources. The most of researches and studies only, which were dome in the standpoint of sociology or economical politics, referred on sponsorship of pro-sports or the correlationship between professional sports and amateur sports. There are a lot of limitation in such studies and researches because of its origins and motivation of study. To the contrary, studies about recreation sports and leisure sports alway have macro economical viewpoint, and this view point were enable analysis that they inspected deep parts of that industry, and found some fatal problems. These studies made a linkage between macro economical aspect and sports economical policy making deciding. Its figure is views as sports research, but its real figure is national economical research. A lot of people don's find figures about sports marketing and industries. This phenomenon make out sports economical industry weaken. In the standpoint of comsumer who are using sports materials and resources, the quality of recreational service product is more important than quantity of it. So, researchers have to do their best for acquiring several useful techniques and methods for developing quality of services and process of service figuring. "Joy," "satisfaction," or "health" were not used in the field study of economics. But nowadays, these concepts are most useful key-words for sport economy, and industry which make huge money for our people. The sports economy make a lot of spare jobs and professions, and it give a great quantity of profits to employees. Convenience of using sports services and products includes not only the satisfaction of consumers but also its halo-effects to the economy and industry. If we will study about these scholar theme, we must divide philosophical fields profit-oriented sports industry, and non-profit-oriented sports industry. We think that this dividing method is proper to studying. The former part is focused on individual consumers activities for sports recreation and managing rear marketing. And the latter part is focused on forecasting of public sports demand, case study of sports marketing. and the necessity of adequate sharing of given-resources for public sports economical effect of national industry. If we will doing these studies with scientific and economical method, we should earn a lot of useful products.

제7차 교육과정의 고등학교 과학교과서 중 생물영역 내용 분석

나문경,정길남,이경희,조운복 부산대학교 사범대학 과학교육연구소 2003 科學敎育硏究報 Vol.30 No.-

The following was e analysis result of high school textbook(biology) m e seventh curriculum. 1. It followed closely fundamental notions ; deleted nutrition, health, heredity and organized metabolism. 2. The total page of a life unit in each science textbook was like the followings. Textbook A was 23%, textbook B 21%, textbook C 21%, textbook D 23%, textbook E 19%, textbook F 22% and textbook G 22%, respectively. The introduction part in related to the subject of the unit could variously carry out direct and experienced studies, providing cartoons, pictures, photos and questions which caused interesting and motives. 3. In terms of the level among textbook contents, the order was like an tissue and organ(38.1%), cell(26%), individual(12%), molecular biosphere(10.9%), molecule(1.6%), large group(1.0%), and the level was to need basic comprehension about the cell, and molecule, tissue and organ of life in biosphere. Comparing the whole textbooks, the subject dealed with science as research, while it didn't deal with evolution and genetic permanence. Because each textbook set up various research study to perform ingenuity and self-initiative study, reducing class hours as deleting heredity unit in the seventh curriculum. The percentage of the subject of each textbook was the order like G, D, F, A, C, B and E. Comparing to the each subject, it was the order like science as research(31.8%), structure function(22.7%), regulation and homeostasis(18.9%), life and environment(11%), variety and unity, the biological basis of behavior, the history of life notion, genetic permanence, evolution. 4. The following was the times and proportion of research activity. It writed down D(13/20%), C·G(11/17%), A(10/15%), B·F(8/12%), E(4/6%) in metabolism and A·D(11/18%), C·G(10/17%), F(9/15%), E(5/8%), B(4/9%) in stimulus & reaction in order. In terms of the unit, it was the order like D(13/20%), C·G(11/17%), A(10/15%), B·F(8/12%), E(4/6%) in metabolism, A·D(11/18%), C·G(10/17%), F(9/15%), E(5/8%), B(4/7%) in stimulus and counteraction, and C(11/24%), F(9/20%), D·G(7/15%), A·B·E(4/9%) in generation. As it supplied various realizable scientific research-activity in the classroom or laboratory, students studied scientific conception, principal with direct, and concreted experiences and operations. Also, they were understood the materials by reading and thinking the unable activity. 5. As the pictures and photos showed the cartoons in relation to subject and study materials and specific aims, it could motive the student's interest and study. The pictures related to daily life, and it introduce fully the original picture about the human body and sense organ in the generation. And the cartoons and pictures express easily to understand and interesting. Comparing to the total percentage, It is the order like D(118/17%), B·G(114/16%), F(95/14%), C(94/14%), E(83/12%), A(78/11%). But in terms of the each unit of the total textbook, 277% in stimulus and counteraction, 209% in metabolism, there wasn't differences. 6. Further & supplementation courses enabled the students to study science with self-initiative, creative through e discussion method to understand the materials-to get easily, table-not to handle in the main text, picture. And as it also supplied the direct & experimental materials, the students could get the opportunities to close the science. 제7차 교육과정에 의해 개정된 고등학교 과학 교과서(생물영역)의 내용을 분석한 결과는 다음과 같다. 1. 생명 단원에서 영양과 건강, 유전을 삭제하고 물질대사를 신설하여 기본 개념 학습에 충실하였다. 2. 과학 교과서별 생명 단원의 총면수는 A교과서가 68면으로 23%, B교과서가 76면 21%, C교과서가 66면 21%, D교과서는 72면으로 23%, E교과서는 69면으로 19%, F교과서는 66면인 22%, G교과서는 72면인 22%로 설정되었으며, 도입부에서는 단원의 주제와 관련하여 실생활 소재나 재미있는 관련 삽화, 사진과 함께 그림을 제시하여 학습 흥미와 동기 유발을 일으킬 수 있는 질문 등을 사용한 점과 다양한 탐구활동을 설정하여 직접적이고 경험적인 활동을 바탕으로 학습을 다양하게 실행할 수 있도록 하였다. 3. 교과서의 내용 중 수준을 분석한 결과 생물권내에서 생물의 세포, 분자 나아가 조직과 기관의 기본적인 이해를 요하는 수준으로 조직과 기관(38.1%), 세포(26%), 개체(12%), 분자·생물권(10.9%), 분자(1.6%), 군집(1.0%)순이었다. 주제로는 전체 교과서를 비교해 봤을 때 탐구로서의 과학을 주로 다루었으며, 진화나 유전적 연속성은 거의 다루지 않았는데, 7차 교육과정에서 유전단원을 삭제하여 시수를 축소하여, 실생활과 관련한 자기 주도적이고 창의적인 학습을 위해 다양한 탐구학습이 주로 설정되었기 때문이다. 교과서별 전체 주제를 다룬 비율을 살펴보면 G, D, F, A, C, B, E순으로 나타났다. 주제별로 비교하면, 탐구로서의 과학(31.8%), 구조화 기능(22.7%), 조절과 항상성(18.9%), 생물과 환경(11%), 다양성과 단일성, 행동의 생물학적 기초, 생물개념의 역사, 유전적 연속성, 진화 순이었다. 4. 탐구활동 첫수 및 비율을 비교해 보면 C(19%), D(18%), G(16%), A(15%), F(15%), B(9%), E(8%)순서로 되어 있다. 단원별로 살펴보면 물질대사에서는 D(13/20%), C·G(11/17%), A(10/15%), B·F(8/12%), E(4/6%)로, 자극과 반응에서는 A·D(11/18%), C·G(10/17%) F(9/15%), E(5/8%), B(4/7%)순서로 실려 있었으며, 생식 단원은 C(11/24%), F(9/20%) D·G(7/15%), A·B·E(4/9%)로 되어 있는데, 교실이나 과학실에서 실현 가능한 다양한 유형의 탐구 활동을 제시하여 직접적이고 구체적인 경험과 조작을 바탕으로 과학 개념과 원리를 학습할 수 있도록 하였고, 실제로 해보기 어려운 활동들은 제시된 자료를 직접 읽거나 보고 생각할 수 있도록 다양하게 수록, 이해하도록 하였으며 과학과 관련된 다양한 읽을거리와 상식들을 제공하여 과학을 가깝고 쉽게 느끼고 접할 주 있도록 하였다. 5. 단원의 성격이나 학습 내용에 부합하는 사진, 그림, 삽화를 제시하고 또한 주제와 관련된 만화를 제시하여 학생들의 흥미를 높이고 학습동기 유발을 강화하였는데, 사진은 일상생활과 관련되고, 자극과 반응, 생식단원에서는 인체나 감각기 등 실물사진을 상세히 소개하였으며 그림이나 삽화(만화포함)는 재미있고 이해하기 아주 쉽게 표현하였다. 총계적 비율로 비교해보면 D(118/17%), B·G(114/16%), F(95/14%), C(94/14%), E(83/12%), A(78/11%)순이었으며, 전체 교과서의 단원별로는 자극과 반응이 277(%), 생식210(%), 물질대사209(%)순으로 차이가 거의 없는 것으로 나타났다. 6. 심화, 보충학습은 단원별로 쉽게 해볼 수 있는 실험이나 주변에서 손쉽게 구할 수 있는 재료들, 상식적으로 알아두어야 할 내용들의 자료제시, 본문에서 미처 다루지 못한 부분의 자료제시, 표나 그림을 이해하여 정리, 토의하도록 하는 방법들을 통해 과학학습이 자기 주도적, 창의적으로 연계될 수 있도록 하였다.

고추의 品種別 光合成速度와 葉의 形質間의 相關關係

安承烈,趙三增,李文煥,金鎭漢 충북대학교 농업과학기술연구소 1992 農業科學硏究 Vol.10 No.1

This study was carried out to study on the relationships between phetosynthetic rate and leaf characters in red pepper varieties. Leaf thickness, chlorophyll content, number of stomata, photosynthetic rate, length and width of palisade cell, and surface area and volume of palisade cell were measured, and inorganic elements were analyzed, and their relationships were studied. The results were summarized as follows: 1. Photosynthetic rate was higher in HongIlpumgochu, Hansolgochu, and lower in OngJogochu, TaeAnJaeRae and CheongYanggochu. 2. Chlorophyll content was higher in HanSolgochu, GiHogochu, and PalBanggochu and lower in TaeArJaeRae and CheongYanggochu. 3. Leaves were thicker in BokKyeongochu and PalBanggochu than in Cheongranggochu and Mankanggochu. 4. Number of stomata was higher in CO 1581, BokKyeongochu, and JinSolgochu than in TaeAnJaeRae and PalBangochu. 5. Palisade cell was longer in GiHogochu and HwaChungochu than in CheongYanggochu, OngJogochu, and HanSolgochu. 6. Palisade cell was wider in KwaRiPutgochu and Putgochu than in ShinHonggocu, TaeAnJaeRae, and SaeRoNaGungochu. 7. Surface area of palisade cell was greater in Gihogochu and HanSolgochu than in OnJogochu and TaeAnJaeRae. 8. Volume of palisade cell was greater in Putgochu and BokKyeongochu than in OngJogochu and ShinHonggochu. 9. Photosynthetic rate was positively and significantly correlated with chlorophyll content, number of stomata, length, thickness, surface area of palisade cell, and volume of palisade cell.

4주간의 쥐뒷다리 고정이 Soleus근섬유 조성에 미친 영향

이선장,김완조,김문희 韓國體育大學校附屬 體育科學硏究所 1992 韓國體育大學校附屬 體育科學硏究所論文集 Vol.11 No.1

The purpose of this study was to examine the effect of immobilization on muscle fiber composition, mass, area and capillarization after 4 - wk of hindlimb suspension. Significant reductions in soleus mass, area and capillary density were occured after 4 wks of hindlimb suspension, Wheres type IIa fiber percentage was significantly increased in the experimental group. The results suggest that hindlimb unweighting induced soleus muscle atropy and these results also demonstrate that muscle fiber atropy not necessarily being associated with a loss in capillary supply.

제왕절개술후 Fentanyl을 이용한 통증자가조절의 효과

김웅,김태환,조문성 동국대학교 경주대학 1996 東國論集 Vol.15 No.-

계획된 제왕절개술을 받은 20명의 산모들을 대상으로 fentanyl을 이용한 정맥내 통증자가조절법(Intravenous patient-controlled analgesia:이하 PCA라 함)을 사용하여 술후 통증조절을 시행하고 VAS, 환자의 만족도, 부작용 등을 조사하였다. 각각의 환자에게 1.5mcg/kg의 fentanyl을 초회량으로 투여하였고 최대 유지용량은 1mcg/kg/hr로 하였다. 사용된 module의 주입 속도는 O.5ml/hr,lock-out interval은 15분이었다. 본 임상실험의 결과는 다음과 같았다. 1) VAS는 PCA시작전 8.18±.83에서 1시간 뒤에 3.15±0.49로 감소하였고, 그 뒤 계속 2∼4사이를 유지하였다. 2) 20명의 환자중 16명의 환자에서 대체로 만족하였다. 3) 부작용으로는 오심 및 구토, 소양증, 졸림증 등을 호소하였고 그정도가 비규적 경미하였다. 이상의 결과로 fentanyl을 이용한 술후 통증자가조절이 통증경감에 좋은 효과를 보이며 환자의 만족도가 높아 술후 통증조절의 유용한 방법이라 생각된다. Intravenous patient-controlled analgesia(PCA) is gaining wide spread popularity in the man agement of post-operative pain. Herein, We studies 20 patients, ASA class I or II, undergoing elective Cesarean section under general anesthesia. We examined post-operative pain control level with VAS, patinet's satisfaction and side effects associated with the use of fentanyl and Baxter infusor. Each patient received 1.5mcg/kg as loading dose and 1mcg/kg/hr of fentanyl as maximum maintenance dose. The module had a flow rate of O.5ml/hr and lock-out interval was 15 minutes. Results were as follow: VAS were 8.18±0.83(before PCA), 3.15±O.83(lhr after PCA) and maintained between 2-4 throughout 24hrs, 16 out of 20 patients were satisfied. Side effects such as nausea, pruritus, drowsiness were noted but with mild intensity. We recommend the use of PCA with fentanyl after surgery to improve post-operative pain because it provides adequate pain relief and high patient's satisfaction.

미국의 스포츠 매니지먼트 연구동향 분석

이강우,육조영,문행자,백광 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.2

The graduates of sports management are employed about to amateur organization, company sports department, country club, resort, public institution, citizen sports center, horse racing, pro-sports team, management or marketing of university games, athlete agency and the campus games and clubs like to recreation sports. Sports management gives the possibility enough to people that interested in sports career. The future of the field depends on the talent' success that finished to sports management process.

아미노산 투여가 운동중 싸이클선수의 젖산 및 심박수에 미치는 영향

이승국,유병렬,김문희,김완조,이선장 韓國體育大學校附屬 體育科學硏究所 1992 韓國體育大學校附屬 體育科學硏究所論文集 Vol.11 No.1

The purpose of the study was to determine whether a 15.6mg.Kg ??' does of glutamate given one hour prior to incremental exercise test would reduce the lactate formation. Five well trained cyclists served as subjects in this experiment which included a placebo and glutamate trial. The subjects initially work on treadmill 200m/min for 3 minutes and here increased the workload by 20m/min every 3minutes until exhaustion. Blood lactate were collected from finger-tip. Subjects in the glutamate trial showed significantly lower lactate formation during exercise then they did in the placebo trial. In both groups no significant difference was found on heart rate. During the recovery lactate and heart, rate were unaltered in either the glutamate or placebo trials. In summary, glutamate ingestion may reduce lactate formation resultly improvement of performance.

아미노산 투여가 중장거리 운동선수의 최대 및 최대하운동시 젖산생성에 미치는 영향

이정수,윤탁영,김문희,이선장,김완조 韓國體育大學校附屬 體育科學硏究所 1992 韓國體育大學校附屬 體育科學硏究所論文集 Vol.11 No.1

The Purpose of the Study was to determine whether the glutamate ingestion prior to exercise would reduce the lactat formation and its clearance in exercising mscle tisue during Submaximal and maximal execise. Six elite distance rummers particapated in this study. The Subjects had a half dose of glutamale(15.6mg .Kg?? ??) at 45min and ingested rest dose at prior to exerise. The test Performed twice. One was Performed in the track and the other was in the Lab. Blood Smples were obtained from catheter which was placed in the antecubital vein (Lab test) and finger tip Samples (Feld test) Unaltered blood lactate was observed in both trials, but, tended to less lactate concentration with glutamate ingestion than that of without glutamate ingestion. The recovery rate of blood lactate was markely rapid with glutamate ingestion in the field test. Unchanged in heart rate was founded in both trials. It many Suggest that, the additional supplement st of glutamate can improve execise performance limiting lactate formation or induce its rapid clearance from the muscle fissue.

Development of an Efficient Notching Toolkit for Response Limiting Method

Jo Mun Shin 항공우주시스템공학회 2021 항공우주시스템공학회지 Vol.15 No.4

At launch, satellites are exposed to various types of structural loads, such as quasi-static loads, sinusoidal vibrations, acoustic/random vibrations, and shocks. The launch environment test is aimed at verifying the structural stability of the test object against the launch environment. Various types of launch environments are simulated by simple vibration, acoustic, and shock tests considering possible test conditions in ground. However, the difference between the launch environment and the test environment is one of the causes of excessive testing. To prevent overtesting, a notching technique that adjusts the frequency range and the input load considering the design load is applied. For notching, specific procedures are established considering the satellite development concept, selected launch vehicle, higher system requirements, and test target level. In this study, the notching method, established procedure, and development of a notching toolkit for efficient testing are described.