• Title/Summary/Keyword: Ubiquitous Networks

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Development of Sensor Network Simulator for Estimating Power Consumption and Execution Time (전력소모량 및 실행시간 추정이 가능한 센서 네트워크 시뮬레이터의 개발)

  • Kim, Bang-Hyun;Kim, Tae-Kyu;Jung, Yong-Doc;Kim, Jong-Hyun
    • Journal of the Korea Society for Simulation
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    • v.15 no.1
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    • pp.35-42
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    • 2006
  • Sensor network, that is an infrastructure of ubiquitous computing, consists of a number of sensor nodes of which hardware is very small. The network topology and routing scheme of the network should be determined according to its purpose, and its hardware and software may have to be changed as needed from time to time. Thus, the sensor network simulator being capable of verifying its behavior and estimating performance is required for better design. Sensor network simulators currently existing have been developed for specific hardwares or operating systems, so that they can only be used for such systems and do not provide any means to estimate the amount of power consumption and program execution time which are major issues for system design. In this study, we develop the sensor network simulator that can be used to design and verify various sensor networks without regarding to types of applications or operating systems, and also has the capability of predicting the amount of power consumption and program execution time. For this purpose, the simulator is developed by using machine instruction-level discrete-event simulation scheme. As a result, the simulator can be used to analyze program execution timings and related system behaviors in the actual sensor nodes in detail. Instruction traces used as workload for simulations are executable images produced by the cross-compiler for ATmega128L microcontroller.

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Design and Implementation of the Management System of Cultivation and Tracking for Agricultural Products using USN (유비쿼터스 센서 네트워크를 이용한 농산물 재배관리 및 이력추적 시스템의 설계 및 구현)

  • Yoo, Nam-Hyun;Song, Gil-Jong;Yoo, Ju-Hyun;Yang, Su-Yeong;Son, Cheol-Su;Koh, Jing-Wang;Kim, Won-Jung
    • Journal of KIISE:Computing Practices and Letters
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    • v.15 no.9
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    • pp.661-674
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    • 2009
  • Recently, there has been much research and many attempts to enhance converged information technology services using new technology such as ubiquitous sensor networks (USN) in medical, environmental, industrial, and logistic areas. There has also been much research and various attempts to apply this new technology to agricultural areas. However, applications to the agricultural areas should be considered differently against the same areas such as medical, environmental, industrial, and logistics. Therefore, this paper suggests that an agricultural cultivating management and traceability system. This system is a unified system that supports the processes sowing seeds through selling agricultural products to consumers. Farmers can be provided with an effective calendar for cultivation and weather information in real time as well as the monitoring of the growth of farm products on the farm in real time using this system. Farmers can also control all equipment installed on the farm directly or remotely and the equipment can be controlled automatically when the measured values such as temperature and humidity deviate from the decent criteria which are set by farmers or this system. Additionally, the reliability for and the better quality of the agricultural products can be improved because farmers can use this unified system to cover all processes from sowing seeds to selling to consumers.

Adaptive Power Control based Efficient Localization Technique in Mobile Wireless Sensor Networks (모바일 무선 센서 네트워크에서 적응적 파워 조절 기반 효율적인 위치인식 기법)

  • Lee, Joa-Hyoung;Jung, In-Bum
    • The KIPS Transactions:PartC
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    • v.16C no.6
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    • pp.737-746
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    • 2009
  • Given the increased interest in ubiquitous computing, wireless sensor network has been researched widely. The localization service which provides the location information of mobile user, is one of important service provided by sensor network. Many methods to obtain the location information of mobile user have been proposed. However, these methods were developed for only one mobile user so that it is hard to extend for multiple mobile users. If multiple mobile users start the localization process concurrently, there could be interference of beacon or ultrasound that each mobile user transmits. In the paper, we propose APL(Adaptive Power Control based Resource Allocation Technique for Efficient Localization Technique), the localization technique for multiple mobile nodes based on adaptive power control in mobile wireless sensor networks. In APL, collision of localization between sensor nodes is prevented by forcing the mobile node to get the permission of localization from anchor nodes. For this, we use RTS(Ready To Send) packet type for localization initiation by mobile node and CTS(Clear To Send) packet type for localization grant by anchor node. NTS(Not To Send) packet type is used to reject localization by anchor node for interference avoidance and STS(Start To Send) for synchronization between 모anchor nodes. At last, the power level of sensor node is controled adaptively to minimize the affected area. The experimental result shows that the number of interference between nodes are increased in proportion to the number of mobile nodes and APL provides efficient localization.

Animation and Machines: designing expressive robot-human interactions (애니메이션과 기계: 감정 표현 로봇과 인간과의 상호작용 연구)

  • Schlittler, Joao Paulo Amaral
    • Cartoon and Animation Studies
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    • s.49
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    • pp.677-696
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    • 2017
  • Cartoons and consequently animation are an effective way of visualizing futuristic scenarios. Here we look at how animation is becoming ubiquitous and an integral part of this future today: the cybernetic and mediated society that we are being transformed into. Animation therefore becomes a form of speech between humans and this networked reality, either as an interface or as representation that gives temporal form to objects. Animation or specifically animated films usually are associated with character based short and feature films, fiction or nonfiction. However animation is not constricted to traditional cinematic formats and language, the same way that design and communication have become treated as separate fields, however according to $Vil{\acute{e}}m$ Flusser they aren't. The same premise can be applied to animation in a networked culture: Animation has become an intrinsic to design processes and products - as in motion graphics, interface design and three-dimensional visualization. Video-games, virtual reality, map based apps and social networks constitute layers of an expanded universe that embodies our network based culture. They are products of design and media disciplines that are increasingly relying on animation as a universal language suited to multi-cultural interactions carried in digital ambients. In this sense animation becomes a discourse, the same way as Roland Barthes describes myth as a type of speech. With the objective of exploring the role of animation as a design tool, the proposed research intends to develop transmedia creative visual strategies using animation both as narrative and as an user interface.

Interference-Avoidance Based Localization for Multiple Mobile Nodes in Mobile Wireless Sensor Networks (모바일 센서네트워크에서 다중 이동 노드를 위한 간섭회피 기반 위치인식)

  • Lee, Joa-Hyoung;Jung, In-Bum
    • The KIPS Transactions:PartC
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    • v.16C no.1
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    • pp.91-100
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    • 2009
  • Given the increased interest in ubiquitous computing, wireless sensor network has been researched widely. The localization service which provides the location information of mobile user, is one of important service provided by sensor network. Many methods to obtain the location information of mobile user have been proposed. However, these methods were developed for only one mobile user so that it is hard to extend for multiple mobile users. If multiple mobile users start the localization process concurrently, there could be interference of beacon or ultrasound that each mobile user transmits. In the paper, we propose IAL, the localization technique with interference avoidance for multiple mobile nodes in mobile wireless sensor networks. In IAL, interference is prevented by forcing the mobile node to get the permission of localization from anchor nodes. For this, we define LIP packet type for localization initiation by mobile node and LGP packet type for localization grant by anchor node. LRP packet type is used to reject localization by anchor node for interference avoidance. The experimental result shows that the number of interference between nodes are increased in proportion to the number of mobile nodes and IAL provides efficient localization.

Development of User Customized Path Finding Algorithm for Public Transportation Information (대중교통 정보제공을 위한 맞춤형 경로탐색 알고리즘 개발)

  • Shin, Sung Il;Park, Je Jin;Lee, Jong Chul;Ha, Tae Jun
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.28 no.3D
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    • pp.317-323
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    • 2008
  • Mass transit information can contribute many benefits to users. Especially, transportation information technology is developing highly with information technology in Korea recently. Hereafter, it is expected to give customized transportation information to users individually with the advent of ubiquitous age in earnest. This public transportation information service can be realized by path finding algorithm in public transportation networks including travel and transfer attributes. In this research, constraints are constructed with the primary facts influencing users. Moreover, the method reducing user's path finding condition arbitrarily is proposed by making the maximum value as variables. In this study, transfer frequency, total travel time, seat confirmation, transfer time and travel time become constraint condition based on k path finding algorithm considering service time constraint condition. Moreover, case study about user customized transfer information is performed in Seoul and metropolitan subway networks.

The Impact of Information Technology on Academic Library Management (정보기술이 대학도서관의 경영관리에 미치는 영향)

  • 윤희윤
    • Journal of the Korean Society for information Management
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    • v.19 no.1
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    • pp.89-114
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    • 2002
  • Information technology. computers, networks, and the World Wide Web are ubiquitous. Academic libraries have applied information technology over the last ten years. The traditional role of the library as the scholarly information heart of the university is being questioned as information technology makes Information ever more easily accessible. And the recent technological development may alter the fundamental concept or identity of the academic library in the twenty-first century. This paper examines the ways in which information technology have chanced the academic library over the last decades and deals with the logical interrelation of 'information technology' and 'management' in the context of academic libraries in Korea. The purpose of this paper is to analyse the impacts of information technology on academic library management (organizational structure. librarian's job and role. budget allocation and expenditures, space planning and functionality, collection paradigm, user service, academic entity, etc) and suggests a desirable acceptance attitudes and efficient management acceptance attitude and management.

Study on the developmental directions of Mobile contents for Mobile e-learning prosumers in Web 2.0 decade (웹 2.0시대 모바일 이-러닝 컨텐츠 소비자의 컨텐츠 활용 확장성 연구)

  • Ahn, Kyung-Whan
    • Journal of Digital Contents Society
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    • v.9 no.1
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    • pp.41-51
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    • 2008
  • In a circumstance that the development of mobile media through the on-line consumer desire in the era of Web 2.0 has promoted extension of personal mobile media on the part of consumers, this study examined consumer trends depending on use of e-learning contents through mobile media. In connection with tendencies through mobile prosumers' consumption patterns and use of mobile educational contents, I analyzed user demands based on characteristics of personal media centering around a communities of e-learning portals. Direction of e-learning technological development calls on mobile communication companies to open their networks and share platform following digital convergence. E-learning contents should be produced in a custom-made way for the personal media. This study is aimed at contributing for advancement of e-learning contents consumers' user convenience implicating examination into consumer demands which are necessary to invigorate e-learning contents.

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A Real-time Context Integration System for Multimodal Sensor Networks using XML (XML을 활용한 멀티모달 센서기반 실시간 컨텍스트 통합 시스템)

  • Yang, Sung-Ihk;Hong, Jin-Hyuk;Cho, Sung-Bae
    • 한국HCI학회:학술대회논문집
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    • 2008.02a
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    • pp.141-146
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    • 2008
  • As the interest about ubiquitous environment is increasing, there are many researches about the services in this environment. These services have important issues in interpreting the users' context, using many kinds of sensors, like PDA, GPS and accelerometers. Low level raw data, which sensors like accelerometers calibrates, are hard to use, and to provide real-time services preprocessing and interpreting the data into context, in real-time, is important. This paper describes a context integrate system which can integrate these sensors and also sensors which has raw data, like accelerometers and physiological sensors, and define the context interpret rule with XML. The proposing system reduces programming operations when adding a sensor to the sensor network or modifying the context interpreting rule by using XML. By using this system, we implemented a real-time data monitoring system which can describe the numeric data into graphs, and assist the user to validate the data and results of the preprocess phase, and also support the external services and applications to use the context of the user.

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Grouping-based 3D Animation Data Compression Method (군집화 기반 3차원 애니메이션 데이터 압축 기법)

  • Choi, Young-Jin;Yeo, Du-Hwan;Klm, Hyung-Seok;Kim, Jee-In
    • 한국HCI학회:학술대회논문집
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    • 2008.02a
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    • pp.461-468
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    • 2008
  • The needs for visualizing interactive multimedia contents on portable devices with realistic three dimensional shapes are increasing as new ubiquitous services are coming into reality. Especially in digital fashion applications with virtual reality technologies for clothes of various forms on different avatars, it is required to provide very high quality visual models over mobile networks. Due to limited network bandwidths and memory spaces of portable devices, it is very difficult to transmit visual data effectively and render realistic appearance of three dimensional images. In this thesis, we propose a compression method to reduce three dimensional data for digital fashion applications. The three dimensional model includes animation of avatar which require very large amounts of data over time. Our proposed method utilizes temporal and spatial coherence of animation data, to reduce the amount. By grouping vertices from three dimensional models, the entire animation is represented by a movement path of a few representative vertices. The existing three dimensional model compression approaches can get benefits from the proposed method by reducing the compression sources through grouping. We expect that the proposed method to be applied not only to three dimensional garment animations but also to generic deformable objects.

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