• 한국지능정보시스템학회:학술대회논문집
• /
• 한국지능정보시스템학회 1999년도 추계학술대회-지능형 정보기술과 미래조직 Information Technology and Future Organization
• /
• pp.243-249
• /
• 1999

구매 의사 결정 과정에서 구매자는 상품 정보와 가격 정보를 필요로 한다. 웹상의 판매자 위주의 시장으로부터 필요한 정보를 수집하려면, 구매자는 매번 구매 때마다 판매자의 사이트를 검색해야 한다. 심지어 구매자가 거래하고 있는 판매자로부터 과거에 구매한 경험이 있는 아이템을 구매하는 경우에도 마찬가지이다. 현재의 전자상거래 환경에서는, 이렇게 기억을 활용하지 않고(memory-less) 검색에만 의존하는 구매자의 행태가 일반적이다. 이 현상을 조직의 구매 경험이 구성원들에게 공유되어야 하는 기업 구매자의 경우에 있어서는 대단히 낭비적인 요소로 작용될 것이다. 구매자 에이전트에게 기억 능력을 부여하려면, 구매자 에이전트와 판매자 에이전트가 갖고 있는 정보간의 일관성을 유지해 주어야 할 필요가 있다. 최소의 노력으로 일관성을 유지하려면, 구매자 에이전트와 판매자 에이전트간에 체계적인 갱신 프로토콜이 필요하다. 본 연구에서는 6가지의 프로토콜(Instantaneous Pull, Periodic Pull, Instantaneous Push, Periodic Push, Instantaneous Solicited Push, Periodic Solicited Push)을 비교하고, 에이전트의 아키텍처와 KQML/XML에 기반 한 메시지 구조를 제시한다. 이들 프로토콜의 상황에 따른 수행 성능 평가가 진행 중이며, 이러한 상황에 적응할 수 있는 에이전트의 프로토타입이 현재 개발 중이다.

• 전력전자학회논문지
• /
• 제18권3호
• /
• pp.247-255
• /
• 2013

In this paper, a soft switching DC-DC converter for AC module type photovoltaic (PV) module integrated converter is proposed. A push-pull converter is suitable for a low voltage PV AC module system because the step-up ratio of a high frequency transformer is high and the number of primary side switches is relatively small. However, the conventional push-pull converters do not have high efficiency because of high switching losses by hard switching and transformer losses (copper and iron losses) by high turns-ratio of the transformer. In the proposed converter, primary side switches are turned on at zero voltage switching (ZCS) condition and turned off at zero current switching (ZVS) condition through parallel resonance between secondary leakage inductance of the transformer and a resonant capacitor. Therefore the proposed push-pull converter decreases the switching loss using soft switching of the primary switches. Also, the turns-ratio of the transformer can be reduced by half using a voltage-doubler of secondary side. The theoretical analysis of the proposed converter is verified by simulation and experimental results.

• 산업경영시스템학회지
• /
• 제36권2호
• /
• pp.81-90
• /
• 2013

Material flow control (MFC) is a kind of operational policy to control of the movement of raw materials, components, and products through the manufacturing lines. It is very important because it varies throughput, line cycle time, and work-in-process (WIP) under the same manufacturing environments. MFC can be largely categorized into three types such as Push, Pull, and Hybrid. In this paper, we set various manufacturing environments to compare five existing MFC mechanisms: Push, Pull, and Hybrid (CONWIP, Gated MaxWIP, Critical WIP Loops, etc). Three manufacturing environments, manufacturing policies (make to stock and make to order), demand (low, medium, high), and line balancing (balanced, unbalanced, and highly unbalanced) are considered. The MFCs are compared in the point of the five functional efficiencies and the proposed compounded efficiency. The simulation results shows that the Push is superior in the functional efficiency and GMWIP is superior in the compounded efficiency.

• 디지털융복합연구
• /
• 제11권8호
• /
• pp.367-373
• /
• 2013

모바일SNS 소통의 새로운 패러다임으로 자리 잡아가고 있다. 최근, 모바일 환경에서 클라이언트 어플리케이션을 이용하여 서버와 통신을 한다. TALK나 PUSH는 메시지나 데이터 소켓을 거쳐 운영체제 상에 존재하는 TCP/IP 소프트웨어를 통해 서비스를 제공하고 있다. 이렇듯 SNS와 모바일 융합은 필연적이며 SNS의 플랫폼을 통해 새로운 서비스를 구축하고 있다. 본 논문에서는 소켓방식을 이용한 위치기반 SNS을 연동하여 클라이언트간의 TALK 및 PUSH 서비스를 설계 및 구현하였다.

• The Journal of Asian Finance, Economics and Business
• /
• 제7권12호
• /
• pp.501-508
• /
• 2020

The focus of this research was on Bali, Indonesia as an international tourist destination. The survey strategy involved self-administered questionnaires distributed to collect data and information supporting this research. The sampling method was non-probability convenience purposive sampling, which means that only those respondents who had visited Bali as a destination for more than two times for their holiday by the time the research was conducted were eligible to fill in the questionnaires. There were 300 questionnaires distributed, only 254 of which were valid. Interview was also conducted for data collection in this research. The structural equation modelling approach was used to analyze the data obtained from respondents, who had visited Bali at least two times. The outcomes of this research reveal a positive influence of push and pull motivational factors on tourist satisfaction. Moreover, a positive, significant correlation between satisfaction and destination loyalty can be seen in this research. With the aim to sustain and enhance destination competitiveness, the results of this research will be beneficial for stakeholders of Bali as a destination. This study helps stakeholders identify push and pull motivational factors in order to better prepare marketing strategies and utilize indicators of push and pull motivation that affect tourists' experience during their stay.

• 농촌지도와개발
• /
• 제22권2호
• /
• pp.101-116
• /
• 2015

This study aims to identify the decision-making factors of people who have returned to rural areas for farming and residence according to personal characteristics and regions. The survey was conducted on 420 return farmers of six cities and counties in Gyeongsangbuk-Do from September 1st to October 11th 2013. For data analysis, researchers used 280 answered sheets and utilized two-way ANOVA and multinomial logistic regression analysis. Research results indicate three factors of returning to farm which are pull to rural area, push from city, and policy factor. The highest scores of factor is pull to rural area (2.93), the second one is push from city (2.31), and the lowest score is politic factor (2.18). In addition, these three factors of returning to farm are elucidated by environmental variable, economic variable, and information and opportunity provided by government. In other words, the factor of pull to rural area is related environmental variable and the factor of push from city is affected by economic variable. Lastly, politic factor pertains to information and opportunity provided by government.

• 한국컴퓨터정보학회논문지
• /
• 제10권6호
• /
• pp.37-46
• /
• 2005

분산 환경 기반으로 많은 작업이 이뤄지는 상황에서 해당 자원에 대한 신뢰성 제공은 매우 중요하다. 자원 제공자는 서비스의 신뢰성을 제공하기위해 일반적으로 채택되는 유형은 서버 리플리케이션 구조 이다. 해당 서버에는 중복된 객체인 리플리카가 유지하는 구조로 이루어진다. 이러한 리플리케이션 구조에서는 안정된 리플리카의 서비스가 중요하므로, 각 리플리카의 결함 발생을 진단하기 위한 구조가 요구된다. 본 논문에서는 분산 객체 시스템에서 제공하는 리플리케이션 관리 시스템의 풀 모니터링 스타일에서 나타날 수 있는 단점을 극복한 CORBA의 푸쉬 모니터링 스타일 기반 효과적 푸쉬 결함 관리 알고리즘을 제안한다. 제안된 푸쉬 결함 모니터링 스타일의 실험결과 비교 대상 시스템에 비해 장애 검출과 관련한 작업량과 평균 타임아웃 비율 측면에서 가치 있는 결과를 확인 할 수 있었다.

• 한국음향학회지
• /
• 제21권1호
• /
• pp.27-36
• /
• 2002

VoiceXML (Voice extensible Markup language)은 음성 대화를 웹의 마크업 언어로 기술할 수 있는 차세대 대화형 음성 서비스를 위한 표준이다. 현재 발표된 VoiceXML 1.0 사양은 음성대화의 기술에 초점을 두고 있으며, 음성 서비스의 시작 시점에 관해서는 언급이 없다. 본 논문에서는 사용자에 의해 시작하는 주문형 (on-demand) 음성 서비스 (inbound call) 뿐만 아니라, 최근에 고객관계관리 (CRM: Customer Relationship Management) 등에서 요구되는 시스템에 의한 푸쉬형 음성 서비스 (outbound call)가 가능한 VoiceXML 플랫폼을 설계하고 구현하였다. 또한, 본 논문에서는 W3C (World Wide Web Consortium)의 호 제어 요구사항 (Call Control Requirements)을 바탕으로 음성 대화 중에 팩스 송수신이 가능하도록 VoiceXML 문서형 정의 (UTD: Document Type Definition)를 확장하였다.

• 산업공학
• /
• 제11권3호
• /
• pp.143-153
• /
• 1998

Warning control is one of the most important components in driver's cabin for achieving safe driving. The purpose of this study is to suggest ergonomically optimal location and type of passenger car's warning control. An experiment was conducted using driving simulator, in which nine locations and two types of warning controls -push button, rocker switch- were employed as experimental variables, and response time for warning signal and preference for locations and types of warning controls were measured as dependent variables. The results showed that response time for warning signal was the shortest when warning control was located at the middle left corner of the center fascia, and was the second at the middle center of the center fascia. Preference for warning signal was the highest at the middle left comer of the center fascia, and was the second between the steering wheel column and the center fascia. Although push button was not preferred to rocker switch, response time was shorter for push button than for rocker switch. It was suggested from these results that warning control with the type of push button should he located at among the middle left corner of the center fascia, the middle center of the center fascia, and between the steering wheel column and the center fascia.

• 대한물리치료과학회지
• /
• 제25권2호
• /
• pp.24-34
• /
• 2018

Purpose: The purpose of this study was to assess how much neurac technic affects the stability muscles of the shoulder according to the supporting surface in crawling position. Method: 29 healthy adult males participated in this experiment. The experiment consists of 2 experimental groups and 1 control group. It is conducted for 3 weeks. Each group exercised for 7 seconds and then rested for 3 seconds. Using EMG, the average value of serratus anterior, upper trapezius, and lower trapezius was repeated three times. Experimental group 1 conducted push up plus exercise applied neurac technic with sling on unstable supporting surface. Experimental group 2 conducted push up plus exercise applied neurac technic with sling on stable supporting surface. Control group conducted the push up plus exercise on stable supporting surface. One-way ANOVA was used for statistical analysis. Result: It was noticeable that the result of Experimental group 1 affects stability muscles of more than Experimental group 2 and Control group. Conclusion: Push up plus position applied neurac technic with sling on unstable supporting surface was the most effective in activating the stability muscles of the shoulder.