• Title/Summary/Keyword: event collection

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Distributed System Architecture Modeling of a Performance Monitoring and Reporting Tool (분산 시스템의 성능 모니터링과 레포팅 툴의 아키텍처 모델링)

  • Kim, Ki;Choi, Eun-Mi
    • Journal of the Korea Society for Simulation
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    • v.12 no.3
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    • pp.69-81
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    • 2003
  • To manage a cluster of distributed server systems, a number of management aspects should be considered in terms of configuration management, fault management, performance management, and user management. System performance monitoring and reporting take an important role for performance and fault management. In this paper, we present distributed system architecture modeling of a performance monitoring and reporting tool. Modeling architecture of four subsystems are introduced: node agent, data collection, performance management & report, and DB schema. The performance-related information collected from distributed servers are categorized into performance counters, event data for system status changes, service quality, and system configuration data. In order to analyze those performance information, we use a number of ways to evaluate data corelation. By using some results from a real site of a company and from simulation of artificial workload, we show the example of performance collection and analysis. Since our report tool detects system fault or node component failure and analyzes performances through resource usage and service quality, we are able to provide information for server load balancing, in short term view, and the cause of system faults and decision for system scale-out and scale-up, in long term view.

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Improving Energy Consumption of Directed Diffusion with Mobile Sinks By Prefetching and Pruning (이동 싱크 환경에서 사전경로설정과 가지치기를 이용한 Directed Diffusion의 에너지 소모 개선)

  • Kim, Sung-Hoon;Lee, Sang-Mok;Yang, Hyun;Park, Chang-Yun
    • Journal of KIISE:Information Networking
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    • v.35 no.1
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    • pp.34-45
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    • 2008
  • In dynamic wireless sensor networks where sources and sinks are moving or are created/died, control overheads for route establishment are increased and thus become one of the major factors for energy consumption. This study introduces prefetching and pruning for Directed Diffusion to remove redundant control messages. Prefetching collects path information for each event with "AnyEvent" in advance and gives quick responses without further flooding of requests. Pruning accumulates history information from previous requests and replies, and then stops forwarding a request towards where the event does not exist. Simulation results with ns show that it is possible to build implicit and soft infrastructures within a Directed Diffusion system through these active collection and passive accumulation and they improve energy consumption more as control overhead goes higher.

Fault Tolerant Data Aggregation for Reliable Data Gathering in Wireless Sensor Networks (무선센서네트워크에서 신뢰성있는 데이터수집을 위한 고장감내형 데이터 병합 기법)

  • Baek, Jang-Woon;Nam, Young-Jin;Jung, Seung-Wan;Seo, Dae-Wha
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.35 no.9B
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    • pp.1295-1304
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    • 2010
  • This paper proposes a fault-tolerant data aggregation which provides energy efficient and reliable data collection in wireless sensor networks. The traditional aggregation scheme does not provide the countermeasure to packet loss or the countermeasure scheme requires a large amount of energy. The proposed scheme applies caching and re-transmission based on the track topology to the adaptive timeout scheduling. The proposed scheme uses a single-path routing based on the traditional tree topology at normal, which reduces the dissipated energy in sensor nodes without any countermeasure against packet loss. The proposed scheme, however, retransmits the lost packet using track topology under event occurrences in order to fulfill more accurate data aggregation. Extensive simulation work under various workloads has revealed that the proposed scheme decrease by 8% in terms of the dissipated energy and enhances data accuracy 41% when the potential of event occurrence exists as compared with TAG data aggregation. And the proposed scheme decrease by 53% in terms of the dissipated energy and shows a similar performance in data accuracy when the potential of event occurrence exists as compared with PERLA data aggregation.

A Study on Collection Method of IoT Information for The Adaptation of Web Services (웹 서비스 적용을 위한 IoT 정보 수집 방법에 관한 연구)

  • Sim, Sung-Ho;Han, Jung-Soo
    • Journal of the Korea Convergence Society
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    • v.8 no.12
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    • pp.71-76
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    • 2017
  • It is necessary to develop a service that meets various environmental requirements so that the Internet of things can be applied to the fourth industry in overall. This paper presents a method for extracting IoT devices information to change the current provider centric service provision environment in order to construct a user centered service provision environment for Web services. Also, it provides users to utilize the appropriate web services through taking advantage of IoT devices information. The existing service provision environment is focused on the method of selecting the service using the provider service information, thus, it is considered necessary for a user-oriented service search method to be in need. In this study, the service list is provided to the user by combining provider information and information extracted from IoT Devices. IoT information collection generates information by separating context information such as information between IoT devices and users and event information between devices through identifiers. In this paper, we propose a development of a user centric service environment by presenting users with a necessary service list through the proposed IoT information.

The Effect of Perceived Costs and Satisfactions on Certain Types of Sales-promotions (세일즈프로모션 이용비용 지각과 소비자 만족에 관한 연구)

  • Shin, Min-Kyung;Joung, Soon-Hee
    • Journal of Families and Better Life
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    • v.27 no.1
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    • pp.31-44
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    • 2009
  • The purpose of this study was to understand how consumers perceive the costs of using certain types of sales-promotions and to suggest ways in which sales-promotions should be developed to contribute to the consumers' welfare and the development of Marketing Strategy. The sufficiency of the consumers' desire was essential to new and creative sales-promotion strategy. This study investigated the perceived costs of using timely opportunity costs, extra expenses, substitution costs, uncomfortable feeling, regrets and economical and psychological satisfactions on certain types of sales-promotions such as off line, coupon, packed items, collection and on line, and event. In the study results on the perceived costs of using certain types of sales-promotions, off line sales-promotions were perceived more than substitution costs, extra expenses, regrets and on line sales-promotions were perceived more than timely opportunity costs. These results were caused by immediately using off line sales-promotions and becoming a member of on line sales-promotions. In the research result on the perceived costs of using certain types of sales-promotions and economical satisfactions, off line sales-promotions exhibited positive relations with substitution costs of coupon and extra expenses, regrets of packed items and collection about economical satisfactions. On line sales-promotions exhibited positive relations with extra expenses and regrets about economical satisfactions. The research results on the perceived costs of using certain types of sales-promotions and psychological satisfactions, off line sales-promotions exhibited positive relations with timely opportunity costs of coupon and collection about psychological satisfactions. On line sales-promotions exhibited positive relations with substitution costs about psychological satisfactions. These results were caused by the feeling of leisure time as the consumer played games or hobbies. This study proposes an approach in the context of sales-promotion with some suggestions and thoughts.

Design and Implementation of Internet Throats and Vulnerabilities Auto Collector for Cyber Threats Management (사이버위협 관리를 위한 인터넷 위협 및 취약점 정보 수집기 설계 및 구현)

  • Lee, Eun-Young;Paek, Seung-Hyun;Park, In-Sung;Yun, Joo-Beom;Oh, Hung-Geun;Lee, Do-Hoon
    • Convergence Security Journal
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    • v.6 no.3
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    • pp.21-28
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    • 2006
  • Beginning flag security it was limited in Firewall but currently many information security solutions like Anti-virus, IDS, Firewall are come to be many. For efficiently managing different kinds of information security products ESM (Enterprise Security management) are developed and operated. Recently over the integrated security management system, TMS (Threat Management System) is rising in new area of interest. It follows in change of like this information security product and also collection information is being turning out diversification. For managing cyber threats, we have to analysis qualitative information (like vulnerabilities and malware codes, security news) as well as the quantity event logs which are from information security products of past. Information Threats and Vulnerability Auto Collector raises the accuracy of cyber threat judgement and can be utilized to respond the cyber threat which does not occur still by gathering qualitative information as well as quantity information.

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AUTOMATIC DATA COLLECTION TO IMPROVE READY-MIXED CONCRETE DELIVERY PERFORMANCE

  • Pan Hao;Sangwon Han
    • International conference on construction engineering and project management
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    • 2011.02a
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    • pp.187-194
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    • 2011
  • Optimizing truck dispatching-intervals is imperative in ready mixed concrete (RMC) delivery process. Intervals shorter than optimal may induce queuing of idle trucks at a construction site, resulting in a long delivery cycle time. On the other hand, intervals longer than optimal can trigger work discontinuity due to a lack of available trucks where required. Therefore, the RMC delivery process should be systematically scheduled in order to minimize the occurrence of waiting trucks as well as guarantee work continuity. However, it is challenging to find optimal intervals, particularly in urban areas, due to variations in both traffic conditions and concrete placement rates at the site. Truck dispatching intervals are usually determined based on the concrete plant managers' intuitive judgments, without sufficient and reliable information regarding traffic and site conditions. Accordingly, the RMC delivery process often experiences inefficiency and/or work discontinuity. Automatic data collection (ADC) techniques (e.g., RFID or GPS) can be effective tools to assist plant managers in finding optimal dispatching intervals, thereby enhancing delivery performance. However, quantitative evidence of the extent of performance improvement has rarely been reported to data, and this is a central reason for a general reluctance within the industry to embrace these techniques, despite their potential benefits. To address this issue, this research reports on the development of a discrete event simulation model and its application to a large-scale building project in Abu Dhabi. The simulation results indicate that ADC techniques can reduce the truck idle time at site by 57% and also enhance the pouring continuity in the RMC delivery process.

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An Estimation of Clogging Factors at Stormwater Grate Inlets with Consideration of Urban Area Characteristics (도시 지역특성을 고려한 빗물받이 유입구의 막힘계수 산정)

  • Kim, Jung-Soo;Song, Ju-Il;Yoon, Sei-Eui
    • 한국방재학회:학술대회논문집
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    • 2007.02a
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    • pp.595-598
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    • 2007
  • Urban storm water collection and conveyance systems are critical components of the urban infrastructures. During a storm event, street grate inlets are usually loaded with debris by the first-flush runoff volume. Grate inlets are subject to clogging effects. Effective interception area of grate inlets was decreased by clogging. It also decreased the interception capacity of grate inlets and increased the inundation area in street. Therefore, it is necessary to analyze the clogging characteristics and interception capacity change by clogging for appropriate design and management of grate inlets. In this study, field survey was executed to investigate debris and clogging pattern of grate inlet in 9 areas. The clogging factor with consideration of urban area characteristics was estimated with the field survey results.

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Definition Sentences Recognition Based on Definition Centroid

  • Kim, Kweon-Yang
    • Journal of the Korean Institute of Intelligent Systems
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    • v.17 no.6
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    • pp.813-818
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    • 2007
  • This paper is concerned with the problem of recognizing definition sentences. Given a definition question like "Who is the person X?", we are to retrieve the definition sentences which capture descriptive information correspond variously to a person's age, occupation, of some role a person played in an event from the collection of news articles. In order to retrieve as many relevant sentences for the definition question as possible, we adopt a centroid based statistical approach which has been applied in summarization of multiple documents. To improve the precision and recall performance, the weight measure of centroid words is supplemented by using external knowledge resource such as Wikipedia and redundant candidate sentences are removed from candidate definitions. We see some improvements obtained by our approach over the baseline for 20 IT persons who have high document frequency.

The Pseudo-Covariational Reasoning Thought Processes in Constructing Graph Function of Reversible Event Dynamics Based on Assimilation and Accommodation Frameworks

  • Subanji, Rajiden;Supratman, Ahman Maedi
    • Research in Mathematical Education
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    • v.19 no.1
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    • pp.61-79
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    • 2015
  • This study discussed about how pseudo-thinking process actually occurs in the mind of the students, used Piaget's frame work of the assimilation and accommodation process. The data collection is conducted using Think-Out-Loud (TOL) method. The study reveals that pseudo thinking process of covariational reasoning occurs originally from incomplete assimilation, incomplete accommodation process or both. Based on this, three models of incomplete thinking structure constructions are established: (1) Deviated thinking structure, (2) Incomplete thinking structure on assimilation process, and (3) Incomplete thinking structure on accommodation process.