• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제12권6호
• /
• pp.2895-2921
• /
• 2018

Security has become one of the major concerns in mobile adhoc networks (MANETs). Data and voice communication amongst roaming battlefield entities (such as platoon of soldiers, inter-battlefield tanks and military aircrafts) served by MANETs throw several challenges. It requires complex securing strategy to address threats such as unauthorized network access, man in the middle attacks, denial of service etc., to provide highly reliable communication amongst the nodes. Intrusion Detection and Prevention System (IDPS) undoubtedly is a crucial ingredient to address these threats. IDPS in MANET is managed by Command Control Communication and Intelligence (C3I) system. It consists of networked computers in the tactical battle area that facilitates comprehensive situation awareness by the commanders for timely and optimum decision-making. Key issue in such IDPS mechanism is lack of Smart Learning Engine. We propose a novel behavioral based "Smart Multi-Instance Multi-Label Intrusion Detection and Prevention System (MIML-IDPS)" that follows a distributed and centralized architecture to support a Robust C3I System. This protocol is deployed in a virtually clustered non-uniform network topology with dynamic election of several virtual head nodes acting as a client Intrusion Detection agent connected to a centralized server IDPS located at Command and Control Center. Distributed virtual client nodes serve as the intelligent decision processing unit and centralized IDPS server act as a Smart MIML decision making unit. Simulation and experimental analysis shows the proposed protocol exhibits computational intelligence with counter attacks, efficient memory utilization, classification accuracy and decision convergence in securing C3I System in a Tactical Battlefield environment.

• 산학경영연구
• /
• 제5권
• /
• pp.215-240
• /
• 1992

The major purpose of this study is to find the problems that the statistics of industrial accidents showed and to prevent the preventive countermeasures for effective security management. An industrial accident is a disease resulting from exposure during employment to condition or substance detrimental to health or life. This is caused by the conditions of employment and is not projected by the man. This results generally from the comprehensive factors. The claiments of 1990 are 7,542,752 members and the economic deficit is up to 2,696,757 million won. Because of this severe damage, the preventive of the industrial accident is highly required. The way of preventive countermeasures could be presentation as follows. First, for securing the safety, precaution about the tools, machineries and working condition is needed from the time of installation. Second, a traing system for the managerial class the specialists or engineers should be established. Cultivation of the appropriate personnel and enhancement of technique for safety are prerequists for reduction of the industrial accidents. Third, the health checkup system must be improved. For the prevention of the occupational disease and good health of the workes, experts who knows workers health must be appointed. In conclusion, industrial accident is not unavoidable result of the advance of the industries but the result of the incapability of management that can not meet the requirement necessary for the prevention of industrial accident. Therefore, each corporation should be regard the above mention and make effective safety control that is free from the industrial accident. The implement of organizational safety programs, similar to the application of company health plan, involves shared administrative responsibilities among top executive line personnel, staff specialists, first line supervisors, and organizational employment.

• 마케팅과학연구
• /
• 제10권
• /
• pp.165-185
• /
• 2002

가상점포 애호도 관련 기존 연구들은 인터넷 쇼핑몰 공급자가 제공하는 속성 즉 디자인, 제품가치, 컨텐츠, 커뮤니케이션, 보안성 등 애호도에 영향을 미치는 개별변수들의 확인에 중점을 둔 연구들이 대부분이었다. 그 결과 연구결과가 비교적 단편적이었으며 가상점포 애호도를 광범위하 게 이해하는데 미흡한 결과를 보여왔다. 따라서 본 연구는 선행연구를 검토하여 가상점포 이미지, 가상점포 만족, 가상점포 신뢰를 도입하여 이들간 관계성을 실증분석함으로써 가상점포 애호도에 미치는 중요변수들을 체계적으로 규명하고자 하였다. 가상점포 이미지, 만족, 신뢰 및 애호도간 관계는 이들 관계에 대한 가설이 채택됨으로써 유의적인 정(+)의 관계가 입증되었다. 본 연구의 결과는 인터넷 쇼핑환경하에서 점포이미지, 만족 및 신뢰가 지속적인 고객애호도를 향상시 키기 위한 전략적 요인임을 실증분석 결과를 통해 확인할 수 있었다.

• 한국사회복지학
• /
• 제55권
• /
• pp.181-204
• /
• 2003

본 연구는 국민의 정부 집권 기간동안 도시 근로자가구의 소득원 구성 가운데 공 사이전소득의 비중, 빈곤 가구의 규모, 그리고 소득분배의 불평등 수준의 변화 정도를 파악하고, 그 수치를 이전 시기의 그것들과 비교하였다. 또한 공적이전소득의 빈곤감소와 소득불평등 완화 효과를 분석하여, 국민의 정부에서 일어난 국가복지제도의 변화가 가지는 파급효과를 간접적으로 평가하였다. 이를 위해 1996년부터 2002년까지 도시가계연보의 원자료(매년, 2/4분기)를 분석의 자료로 활용하였다. 분석의 결과, 국민의 정부 들어 도시 근로자가구의 공적이전소득의 비중은 이전의 시기에 비해 조금 증가하고 있다. 그러나 빈곤 근로자가구의 공적이전소득의 비중은 상대적으로 크게 증가한 것으로 나타나, 국민기초생활보장제도의 파급효과가 입증되었다. 국민의 정부 집권 기간동안 상대적 빈곤율과 소득불평등의 수준은 매우 악화되었지만, 공적이전소득의 빈곤감소 효과나 소득불평등 완화 효과는 이전의 시기에 비해 크게 증가하였다. 그러나 그 효과는 서구 선진국의 그것과 비교해 볼 때, 매우 낮은 수준이다. 결국 정부가 빈곤율을 감소시키고 소득분배 구조의 개선을 위해서는 보다 적극적인 국가복지의 확대를 위해 노력하여야 할 것이며, 그것이 개별 사회성원의 소득원 구성 가운데 공적이전소득의 비중 확대로 이어져야 할 것이다.

• 한국환경복원기술학회지
• /
• 제23권2호
• /
• pp.17-31
• /
• 2020

In the field of environmental landscape architecture, the internet medium is used as an effective communication tool not only in the private level but also in the policy level. Recently, the active utilization of mobile web service is emphasized as the time changes, but there is not much improvement or advance in services due to lack of relevant studies. Therefore, this study is intended to provide basic data needed for improvement and advance by researching the quality of mobile web service among multichannel services provided in environmental landscape architecture related internet media. The model for measuring service quality is SERVQUAL, which was verified in the study of Choi(2015), Choi and Koo(2016), and the final valid samples are total 230. First, the subjects were analyzed as the representative media that are possible to acquire comprehensive knowledge related to environmental landscape architecture. Second, the highest importance level in each subsection was 'protection and security maintenance of customer information' followed by 'Reliability about accurate information supply'. Regarding performance level, 'Reliability about accurate information supply' and 'professional knowledge to communicate with users' are highly evaluated. Third, regarding Importance-Performance Analysis(IPA), the first priority management should is 'Tangibles', and the next are 'Responsibility' and 'Empathy'. The ones for maintenance of the status quo are 'Reliability' and 'Assurance', and there is none for effort reduction. Meanwhile, regarding the importance of each factor and difference in the quality of PC web service and mobile web service studied before, the biggest difference is in 'Tangibles', followed by 'Assurance', 'Empathy', 'Responsibility' and 'Reliability'. It is suggested that the revitalization of Landscape information science(LB1106) presented in the National Science&Technology Standard Classification System is needed. In the future, it is necessary to research the change trend on users' response through continuous evaluation of improved mobile web service.

• 보건의료산업학회지
• /
• 제6권1호
• /
• pp.87-103
• /
• 2012

The purpose of this study is to investigate the determinants of intent to leave among workers at long-term care institutions in South Korea. The model represents a revision of the Price(2001) model which extends previous research by providing a comprehensive review of the economic, psychological, sociological literature. This study also examined the moderating effects of values toward independent variables on the job satisfaction and organizational commitment. The sample used in this study consisted of 400 workers from 9 long-term care hospitals and facilities nationwide. Data were collected with self-administered questionnaires and analysed using multiple regression analysis and path analysis. The main results of the study were as follows. The variance of job satisfaction and organizational commitment explained by the independent variables used in the study are 74.5% and 76.3% respectively. The results of this study revealed that the following variables have significant negative effects on intent to leave among workers; organizational commitment, job satisfaction, positive affectivity, supervisor support, job significance, job security, job growth. And the following variables have significant positive effects on intent to leave among workers; job opportunity, negative affectivity. This result is same when the moderating role of values were considered in the analysis. Among demographic variables, only age was found to have a significant positive effect on the intent to leave among workers.

• Structural Monitoring and Maintenance
• /
• 제5권1호
• /
• pp.67-78
• /
• 2018

The stability of cutting slope influences the safety of railway operation, and how to identify the stability of the slope quickly and determine the rational monitoring plan is a pressing problem at present. In this study, the attribute recognition model of risk assessment for high cutting slope stability in the heavy haul railway is established based on attribute mathematics theory, followed by the consequent monitoring scheme design. Firstly, based on comprehensive analysis on the risk factors of heavy haul railway loess slope, collapsibility, tectonic feature, slope shape, rainfall, vegetation conditions, train speed are selected as the indexes of the risk assessment, and the grading criteria of each index is established. Meanwhile, the weights of the assessment indexes are determined by AHP judgment matrix. Secondly, The attribute measurement functions are given to compute attribute measurement of single index and synthetic attribute, and the attribute recognition model was used to assess the risk of a typical heavy haul railway loess slope, Finally, according to the risk assessment results, the monitoring content and method of this loess slope were determined to avoid geological disasters and ensure the security of the railway infrastructure. This attribute identification- risk assessment- monitoring design mode could provide an effective way for the risk assessment and control of heavy haul railway in the loess plateau.

• 한국농공학회논문집
• /
• 제59권2호
• /
• pp.81-90
• /
• 2017

Recent floodplain data are important for river master plan, storm and flood damage reduction comprehensive plan and pre-disaster impact assessment. Hazard map, base of floodplain data, is being emphasized as important method of non-structural flood prevention and consist of inundation trace map, inundation expected map and hazard information map. Inundation trace map describes distribution of area that damaged from typhoons, heavy rain and tsunamis and includes identified flood level, flood depth and flood time from flooding area. However due to lack of these data by local government, which are foundational and supposed to be well prepared nationwide, having hard time for making inundation trace map or hazard information map. To overcome this problem, time consumption and budget reduction is required through various research. From this study, DEM (Digital Elevation Model) from image material from UAVS (Unmanned Aerial Vehicle System) and numeric geographic map from National Geographic Information Institute are used for calculating flooding damaged area and compared with inundation trace map. As results, inundation trace map DEM based on image material from UAVS had better accuracy than that used DEM based on numeric geographic map. And making hazard map could be easier and more accurate by utilizing image material from UAVS than before.

• 한국콘텐츠학회논문지
• /
• 제14권6호
• /
• pp.129-139
• /
• 2014

이 연구의 목적은 다양한 차원의 박탈지표를 이용하여 아동빈곤의 특성을 규명하는 것이다. 이 연구의 목적을 위해 2012년 7차 한국복지패널조사자료를 이용하였으며, 잠재집단 분석기법을 활용하여 아동빈곤 집단을 유형화하였다. 분석결과, 아동이 있는 가구를 주거비 과부담, 다차원 박탈, 비빈곤 등 세 개의 집단으로 유형화하였다. 주거비 과부담 집단은 다른 영역에서 박탈은 높지 않지만, 주거비 부담이 높은 집단이다. 다차원 박탈 집단은 열악한 주거환경, 식생활 영역 및 고용 등의 다양한 차원에서 박탈을 경험할 확률이 높은 집단이다. 마지막으로 비빈곤 집단은 박탈을 경험할 가능성이 매우 낮은 집단이다. 잠재집단의 특성을 파악하기 위해 다항로짓분석을 수행하였다. 분석결과, 다차원 박탈집단은 다른 두 집단과 차이가 있는 것으로 나타났다. 비빈곤 집단과 주거비 과부담 집단 간에는 큰 차이를 보이지 않는 것으로 나타났다. 분석결과는 아동이 거주하는 가구의 복지, 교육, 문화적 자원의 박탈 등 다차원적인 문제에 대한 통합적인 접근이 필요함을 시사한다.

• 기술혁신학회지
• /
• 제14권4호
• /
• pp.1050-1072
• /
• 2011

글로벌 기술협력은 파트너 간 이해관계 불일치와 기술수준, 문화, 언어 및 각종 거시적 환경여건의 차이로 국내 기업 간 협력보다 훨씬 더 어려운 것이 사실이다. 본 연구는 국제 기술협력에서 제기되는 여러 어려움을 극복하고 성공적인 성과를 도출한 한국전자통신연구원(이하 ETRI)과 Microsoft사의 글로벌 기술협력 사례를 조사 분석하였다. 이를 위해 자원기반이론, 네트워크 이론, 관계마케팅 이론 등의 기술협력 이론을 검토하였다. 아울러 시장지배력 관점에서 두 기관의 협력 동기를 살펴보았다. 양 기관 간 기술협력 심층조사 과정에서 도출된 주요 성공요인들로서 명확한 협력목적, 신뢰에 기반한 소통, 파트너가 의존할 수 있는 핵심역량, 사회문화적 요소 등 환경요인이 도출되었다.