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모바일 사용자를 위한 Q+R 트리 기반 퍼브-서브 시스템
이명국,김경백,Lee, Myung-Guk,Kim, Kyungbaek 한국스마트미디어학회 2015 스마트미디어저널 Vol.4 No.3
퍼브/서브 시스템(Pub/Sub System)은 시스템에서 발행되는 정보 중 사용자가 등록한 관심 정보만을 사용자에게 전달해주는 시스템이다. 기존의 퍼브/서브 시스템은 컨텐트의 저장 및 전달을 담당하는 브로커들을 네트워크화 하여 구현되었다. 모바일 사용자가 급증함에 따라 사용자의 관심위치 정보와 같은 지속적으로 변하게 되는 관심정보를 다루기 위한 퍼브/서브 시스템에 대한 수요가 부각 되고 있다. 이 논문에서는 기존의 퍼브/서브 시스템에서 깊이 고려하지 않았던, 관심 위치 정보의 빈번한 변화를 효과적으로 처리하기 위한 브로커 네트워크 기반의 퍼브/서브 시스템을 제안한다. 사용자의 행동 패턴이나 지리적 특성을 고려해 퍼브/서브 시스템에서 관리하는 공간 데이터 영역을 Slow Moving Region과 Normal Moving Region의 두가지 타입으로 구분하고, 각 영역에 대한 사용자의 요청을 효과적으로 지원하기 위해 Q+R트리를 사용하여 브로커를 관리한다. 시뮬레이션을 사용한 실험 결과를 통해 제안하는 Q+R트리 기반의 브로커 네트워크가 불필요한 브로커의 로드와 네트워크 트래픽을 감소시킴으로써 보다 효과적으로 지속적인 사용자의 관심 위치 정보 변화를 지원할 수 있음을 확인하였다. A pub(lish)/sub(scribe) system is a data forwarding system which forwards only interesting data among the whole published data, which is related to the subscriptions registered by end users. Classical pub/sub systems are realized by constructing a network of brokers which are responsible for storing or forwarding data. Along with the substantial increase of the population mobile users, it is required that the pub/sub system handles the subscriptions of user locations which changes continuously and frequently. In this paper, a new broker network based pub/sub system which efficiently handles the frequent changes of subscriptions related to user locations is proposed. In consideration of moving patterns of users and geographical property, the proposed pub/sub system categorize the entire data space into Slow Moving Region and Normal Moving Region, and manages the brokers which are responsible for these regions by using Q+R tree in order to handle user requests more efficiently. Through the extensive simulation, it is presented that the proposed Q+R tree based pub/sub system can reduce unnecessary needs of brokers and network traffic and can support the dynamic subscription related to user location.
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이명국 한국기업경영학회 1997 기업경영연구 Vol.4 No.2
Consumer want to buy products which they want to buy under certain informations about the products, because, in many cases of buying products under uncertain informations, they feel postpurchase dissonance and/or dissatisfaction. so consumers search internal and/or external information. The purpose of this study is to find the relationship between patterns of involvement and consumer information processing under situations with considerating several moderators. Patterns of involvement in this study mean enduring involvement and situational involvement, and patterns of consumer information processing mean choice by processing brand(CPB), choice by processing attribute(CPA). Several moderators which was used in this study are consumer knowledge such as familiarity and subjective expertise, and variety-seeking behavior. Findings of this study are as follows ; The strongest involvement set with processing by brand is the set of situational low involvement(mean=4.88), and the next is the set of enduring low involvement(mean=4.42), and the third is the set of situational high involvement(mean=4.12). The weakest involvement set with processing by brand is the set of enduring high involvement.
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持續的 關與와 狀況的 關與하에서의 消費者 情報探索方式 및 情報探索方式別 處理程度
이명국 한국기업경영학회 1998 기업경영연구 Vol.5 No.2
This study was conducted to find the relationship between patterns of involvement and patterns of information processing, and patterns of involvement and degree of consumer information processing under situations with considerating moderator, familiarity. Patterns of involvement in this study mean enduring involvement(EI) and situation involvement(SI), and patterns of consumer information processing mean choice by processing brand(CPB), choice by processing attribute(CPA). Moderator which was used in this study is familiarity, a kind of consumer knowledge. Finding of this study are as follows; 1. This study did not find a significant fact in relationship between patterns of involvement(EI/SI) and patterns of information processing(CPB/CPA). 1. The strongest involvement set with choice by processing attribute(CPA) is the set of enduring high involvement(mean=5.000), and the next is the set of situational high involvement(mean=4.236), and the third is the set of situational low involvement(mean=3.913). The weakest involvement set with choice by processing attribute(CPA) is the set of enduring low involvement. 2. And familiarity, a kind of consumer knowledge, does moderating role between patterns of involvement and degree of choice by processing attribute(CPA). 3. There is a statistically significant difference between information sources and degree of consumer processing by attribute.
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李明國 한국기업경영학회 1996 기업경영연구 Vol.3 No.1
In fact, to manage small-medium enterprises of recent is very difficult on every aspects. To improve such difficult problems on managements of those, it`s undoutedly that the bank must make advance to those enterprises or The Government of Our Country must support an enterprising fund, etc. But, such things are only short-term solutions. So, those enterprises must imorove manager`s mind or knowledgment on managements, and their abilities to cope with dynamic environments to survive and grow between severely competitions. And it`s good that those enterprises are also be taken consulting for management improvements from Management Consultant. On these viewpoints, the main purpose of this study is to give information about management diagnosis and management consulting for small-medium enterprises. The progress-processes of management diagnosis and management consulting are as follows; 1. First stage ; surveying general conditions. 2. Second stage ; diagnosis problems. 3. Third stage ; cordinating between sections. 4. Fourth stage ; recommending improvements. 5. Fifth stage ; Guiding post-management. And execution-ways of management diagnosis and management consulting are discribed in the body of this study according to it`s the progress-processes. In conclusion, this study tells that the management of small-medium enterprises can be improved through improving manager`s mind or knowledgments on managements, and their abilities to cope with dynamic environments, and managements diagnosis from Management Consultant, etc.
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