Sample records for context aware applications

  1. Context-aware computing applications

    Microsoft Academic Search

    Bill N. Schilit; Norman Adams; Roy Want

    1994-01-01

    Describes systems that examine and react to an individual's changing context. Such systems can promote and mediate people's interactions with devices, computers and other people, and they can help navigate unfamiliar places. We believe that a limited amount of information covering a person's proximate environment is most important for this form of computing, since the interesting part of the world

  2. Context-Aware Pervasive Computing at Large: Three Example Applications

    E-print Network

    Loke, Seng W. - Loke, Seng W.

    : the situation What is a context-aware pervasive computing system? A system that can respond intelligentlyContext-Aware Pervasive Computing at Large: Three Example Applications Seng W. Loke Department;Context-Awareness in Pervasive Computing Started in Schilit's PhD thesis on context-awareness for mobile

  3. Context-Aware Recommendations in the Mobile Tourist Application COMPASS

    Microsoft Academic Search

    Mark Van Setten; Stanislav Pokraev; Johan Koolwaaij

    2004-01-01

    This paper describes the context- aware mobile tourist application COMPASS that adapts its services to the user's needs based on both the user's interests and his current context. In order to provide context-aware recommendations, a recommender system has been integrated with a context- aware application platform. We describe how this integration has been accomplished and how users feel about such

  4. CASS - Middleware for Mobile Context-Aware Applications

    Microsoft Academic Search

    Patrick Fahy; Siobhan Clarke

    2004-01-01

    Among the difficulties faced by designers of mobile context-aware applications is the increased burden of having to deal with context and also the processing and memory constraints of small mobile computers. Although progress has been made in the area of frameworks and toolkits for context- awareness, there is still a need for middleware that supports higher-level context abstractions and is

  5. iCAP: Rapid Prototyping of Context-Aware Applications

    Microsoft Academic Search

    Timothy Sohn; Anind K. Dey

    2003-01-01

    Although numerous context-aware applications, those that implicitly take their context of use into account, have been developed, and advances have been made in technology to acquire contextual information, it is still difficult to develop and prototype interesting context-aware applications. This is largely due to the lack of programming support available to both programmers and end users. In this paper we

  6. The Java Context Awareness Framework (JCAF) - A Service Infrastructure and Programming Framework for Context-Aware Applications

    Microsoft Academic Search

    Jakob E. Bardram

    2005-01-01

    Context-awareness is a key concept in ubiquitous computing. But to avoid developing dedicated context-awareness sub-systems for specific applica- tion areas there is a need for more generic programming frameworks. Such frame- works can help the programmer to develop and deploy context-aware applications faster. This paper describes the Java Context-Awareness Framework- JCAF, which is a Java-based context-awareness infrastructure and programming API

  7. Context-aware applications: from the laboratory to the marketplace

    Microsoft Academic Search

    P. J. Brown; J. D. Bovey; Xian Chen

    1997-01-01

    Current hardware developments are making mobile computing increasingly attractive. An important class of mobile applications are context-aware applications: applications that change their behaviour according to the user's present context-their location, who they are with, what the time of day is, and so on. This article is about software design for context-aware applications. Currently most such applications have been crafted by

  8. a CAPpella: programming by demonstration of context-aware applications

    Microsoft Academic Search

    Anind K. Dey; Raffay Hamid; Chris Beckmann; Ian Li; Daniel Hsu

    2004-01-01

    Context-aware applications are applications that implicitly take their context of use into account by adapting to changes in a user's activities and environments. No one has more intimate knowledge about these activities and environments than end-users themselves. Currently there is no support for end-users to build context-aware applications for these dynamic settings. To address this issue, we present a CAPpella,

  9. Middleware Solutions for Context-Aware Applications

    Microsoft Academic Search

    Licia Capra; Wolfgang Emmerich; Cecilia Mascolo

    In this paper, we argue that middleware for wired distributed systems cannot be used in a mobile setting, as the principle of trans- parency that has driven their design runs counter to the new degrees of awareness imposed by mobility. We propose the marriage of reection and metadata as a means for middleware to give applications dynamic access to information

  10. An ultrasonic compass for context-aware mobile applications

    E-print Network

    Wang, Kevin John, 1981-

    2004-01-01

    If we are to realize the everyday benefits promised by pervasive computing and context-aware applications, we must first develop the infrastructure to provide contextual location and orientation information through pervasive ...

  11. Ambient Intelligence: Awareness context application in industrial storage

    E-print Network

    Paris-Sud XI, Université de

    Ambient Intelligence: Awareness context application in industrial storage Ahmed Zouinkhi1, 2 , Eddy substances using WSNs. We present an approach to modeling and simulating coopera- tion between intelligent to increase their security, in a context of ambient intelligence of a deposit for chemical substances

  12. Solar: An Open Platform for Context-Aware Mobile Applications

    E-print Network

    Kotz, David

    Solar: An Open Platform for Context-Aware Mobile Applications Guanling Chen and David Kotz Dept the user state and the physical and computational environ- ment in which they run. Solar is a middleware into the in- frastructure, Solar allows applications to run on thin mo- bile clients more effectively

  13. The Cricket Compass for ContextAware Mobile Applications

    E-print Network

    The Cricket Compass for Context­Aware Mobile Applications Nissanka B. Priyantha, Allen K. L. Miu compass, knowledge of orientation through the Cricket com- pass attached to a mobile device enhances, and \\augmented-reality" displays. Our compass infrastructure enhances the spatial inference capability

  14. An Ultrasonic Compass for Context-Aware Mobile Applications

    E-print Network

    An Ultrasonic Compass for Context-Aware Mobile Applications by Kevin John Wang Submitted by . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Arthur C. Smith Chairman, Department Committee on Graduate Students #12;2 #12;An Ultrasonic Compass in the Cricket system. I design and implement a prototype of this Cricket Compass using a combination of hardware

  15. Context-Aware Mesh Smoothing for Biomedical Applications Tobias Moencha,

    E-print Network

    and binary segmentation in medical image data for subsequent removal by adaptive mesh smoothing. This paperContext-Aware Mesh Smoothing for Biomedical Applications Tobias Moencha, , Rocco Gasteigera , Gabor Abstract Smoothing algorithms allow to reduce artifacts from mesh generation, but often degrade accuracy

  16. Cyberguide: prototyping context-aware mobile applications

    Microsoft Academic Search

    Sue Long; Dietmar Aust; Gregory Abowd; Chris Atkeson

    1996-01-01

    We are interested in prototyping future computing environments. In this paper, we present the Cyberguide project, which is building prototypes of handheld, intelligent tour guides that provide information to a tourist based on knowledge of position and orientation. We will describe features of existing Cyberguide prototypes and discuss important research issues that have emerged in contextaware applications development in a

  17. SWRL-based context awareness for application servers hosting digital services

    E-print Network

    Paris-Sud XI, Université de

    SWRL-based context awareness for application servers hosting digital services Yves-Gaël Billet. As the number of context-aware applications increases in the real world, it can be quite difficult to deploy, we propose a novel approach for easing the deployment of context- aware applications into application

  18. The cricket compass for context-aware mobile applications

    Microsoft Academic Search

    Nissanka B. Priyantha; Allen K. L. Miu; Hari Balakrishnan; Seth J. Teller

    2001-01-01

    The ability to determine the orientation of a device is of fundamental importance in context aware and location-dependent mobile computing. By analogy to a traditional compass, knowledge of orientation through the Cricket compass attached to a mobile device enhances various applications, including efficient way-finding and navigation, directional service discovery, and “augmented-reality” displays. Our compass infrastructure enhances the spatial inference capability

  19. Context-Aware Aspects

    Microsoft Academic Search

    Éric Tanter; Kris Gybels; Marcus Denker; Alexandre Bergel

    2006-01-01

    Context-aware applications behave differently depending on the context in which they are running. Since context-specific behavior tends to crosscut base programs, it can advantageously be implemented as aspects. This leads to the notion of context-aware aspects, i.e. ,a spects whose behavior depends on context. This paper analyzes the issue of appropriate support from the aspect language to both restrict the

  20. An integration platform for developing context-aware applications based on context reasoning and service automation techniques

    Microsoft Academic Search

    Po-Cheng Huang; Cheng-Yi Chien; Kuan-Rong Lee; Yau-Hwang Kuo; Ming-Zoo Wu

    2009-01-01

    This paper proposes an integration platform composed of agent platform and Open Services Gateway Initiative (OSGi) framework to assist in developing context-aware applications. For developing context-aware applications, we firstly have to gather data through sensor networks and reason the meaningful context information. Secondly, context-aware applications must make the decision according to the context information, and provide the user-centric service through

  1. Adaptive middleware for context-aware applications in smart-homes

    Microsoft Academic Search

    Markus C. Huebscher; Julie A. McCann

    2004-01-01

    We propose an adaptive middleware design for context-aware applications that abstracts the applications from the sensors that provide context. Further, we use application-specific utility functions to choose, given multiple alternatives for providing a specific context, one alternative at any time that provides the context for all applications, whilst maximising the applications' total \\

  2. Introducing Context-Awareness in Applications by Transforming High-Level Rules

    E-print Network

    Paris-Sud XI, Université de

    Introducing Context-Awareness in Applications by Transforming High-Level Rules Carlos Andr´es Parra environments, in which devices are aware and able to react to changes in their environment. In this position paper we describe a specific approach for the development of context-aware software. We propose to make

  3. Visualization of Uncertainty in Context Aware Mobile Applications

    E-print Network

    . Their first principle is "inform the user of the current contextual system capabilities and understandings information gathered from GPS devices or information about the current activity of a person based on audio] defined four design principles for intelligibility and accountability in context-aware systems

  4. Bug-Free Sensors: The Automatic Verification of Context-Aware TinyOS Applications

    NASA Astrophysics Data System (ADS)

    Bucur, Doina; Kwiatkowska, Marta

    We provide the first tool for verifying the logic of context-aware applications written for the mainstream sensor network operating system TinyOS; we focus on detecting programming errors related to incorrect adaptation to context.

  5. Context-Aware Browser

    Microsoft Academic Search

    Paolo Coppola; Vincenzo Della Mea; Luca Di Gaspero; Danny Mischis; Stefano Mizzaro; Elena Nazzi; Ivan Scagnetto; Luca Vassena

    2009-01-01

    We propose the Context-Aware Browser, a new approach to context-aware Web content perusal by means of mobile devices. The Context-Aware Browser exploits artificial intelligence techniques and mixes several ingredients: it is a Web browser running on one's own mobile device and capable of automatically and proactively downloading and executing context-aware Web contents, selected by querying a search engine on the

  6. Smart furniture: a platform for context-aware embedded ubiquitous applications

    Microsoft Academic Search

    Hideyuki Tokuda

    2004-01-01

    In ubiquitous computing environment, many embedded computers, sensors, devices, and networks are connected for creating context-aware embedded ubiquitous applications. We often build a smart house or a room to demonstrate such context-aware ubiquitous applications. However, the cost and time for building such a house is a barrier to the deployment of various embedded ubiquitous applications.We have developed Smart Furniture which

  7. The Context Toolkit: Aiding the Development of Context-Aware Applications

    Microsoft Academic Search

    Daniel Salber; Anind K. Dey; Gregory D. Abowd

    1999-01-01

    Context is an important, yet poorly understood and poorlyutilized source of information in interactive computing. Itwill be of particular importance in the new millennium asusers move away from their desktops and into settingswhere their contexts are changing rapidly. Context isdifficult to use because, unlike other forms of user input,there is no common, reusable way to handle it. As a result,context-aware

  8. Solar: An Open Platform for Context-Aware Mobile Applications

    Microsoft Academic Search

    Guanling Chen; David Kotz

    2002-01-01

    Emerging pervasive computing technologies transform the way we live and work by embedding computation in our surrounding environment. To avoid increasing com- plexity, and allow the user to concentrate on her tasks, applications in a pervasive computing environment must automatically adapt to their changing context, including the user state and the physical and computational environ- ment in which they run.

  9. Reflective Middleware Solutions for Context-Aware Applications

    Microsoft Academic Search

    Licia Capra; Wolfgang Emmerich; Cecilia Mascolo

    2001-01-01

    In this paper, we argue that middleware for wired distributedsystems cannot be used in a mobile setting, as the principle of transparencythat has driven their design runs counter to the new degrees ofawareness imposed by mobility. We propose the marriage of reflectionand metadata as a means for middleware to give applications dynamicaccess to information about their execution context. Finally, we

  10. Improving Understanding and Trust with Intelligibility in Context-Aware Applications

    ERIC Educational Resources Information Center

    Lim, Brian Y.

    2012-01-01

    To facilitate everyday activities, context-aware applications use sensors to detect what is happening and use increasingly complex mechanisms ( e.g., by using big rule-sets or machine learning) to infer the user's context and intent. For example, a mobile application can recognize that the user is in a conversation and suppress any incoming…

  11. Context-Aware Monitoring of Untrusted Mobile Applications

    NASA Astrophysics Data System (ADS)

    Brown, Andrew; Ryan, Mark

    Current measures to enhance the security of untrusted mobile applications require a user to trust the software vendor. They do not guarantee complete protection against the behaviours that mobile malware commonly exhibits. This paper expands execution monitoring, building a more precise system to prevent mobile applications deviating from their intended functions. User judgements about program execution can be specified abstractly and compiled into a monitor capable of identifying an event’s context. We demonstrate our development of a prototype system for the BlackBerry platform and show how it can defend the device against unseen malware more effectively than existing security tools.

  12. Smart Furniture: A Platform for Creating Context-Aware Ubiquitous Applications Everywhere

    Microsoft Academic Search

    Hideyuki Tokuda

    2004-01-01

    \\u000a In ubiquitous computing environment, many embedded computers, sensors, devices, and networks are connected for creating context-aware\\u000a ubiquitous applications. We often build a smart house or a room to demonstrate such context-aware ubiquitous applications.\\u000a However, the cost and time for building such a house is a barrier to the deployment of various embedded ubiquitous applications.\\u000a \\u000a \\u000a We have developed Smart Furniture which

  13. Towards automatic behavior synthesis of a coordinator component for context-aware mobile applications

    Microsoft Academic Search

    Laura M. Daniele; Luis Ferreira Pires; Sinderen van Marten

    2009-01-01

    Although behavior modeling should play a central role in model-driven application development, it is still unclear how behavior modeling should be incorporated in model transformations. This paper presents an MDA-based approach that incorporates behavior modeling at the platform-independent model (PIM) level of the design process of a specific category of applications, i.e., context-aware mobile applications. This approach includes two model

  14. Dynamic Request Allocation and Scheduling for Context Aware Applications Subject to a Percentile Response Time SLA in a Distributed Cloud

    Microsoft Academic Search

    Keerthana Boloor; Rada Chirkova; Yannis Viniotis; Tiia Salo

    2010-01-01

    We consider geographically distributed data centers forming a collectively managed cloud computing system, hosting multiple Service Oriented Architecture (SOA) based context aware applications, each subject to Service Level Agreements (SLA). The Service Level Agreements for each context aware application require the response time of a certain percentile of the input requests to be less than a specified value for a

  15. Context-Aware Monitoring of Untrusted Mobile Applications

    Microsoft Academic Search

    Andrew Brown; Mark Ryan

    2009-01-01

    Current measures to enhance the security of untrusted mo- bile applications require a user to trust the software vendor. They do not guarantee complete protection against the behaviours that mobile malware commonly exhibits. This paper expands execution monitoring, building a more precise system to prevent mobile applications deviating from their intended functions. User judgements about program execution can be specied

  16. Securing context-aware applications using environment roles

    Microsoft Academic Search

    Michael J. Covington; Wende Long; Srividhya Srinivasan; Anind K. Dev; Mustaque Ahamad

    2001-01-01

    In the future, a largely invisible and ubiquitous computing infrastructure will assist people with a variety of activities in the home and at work. The applications that will be deployed in such systems will create and manipulate private information and will provide access to a variety of other resources. Securing such applications is challenging for a number of reasons. Unlike

  17. Exhibition User Experience Research and Design for Applications of Context Awareness Technologies

    Microsoft Academic Search

    Jikun Liu; Xin Liu; Bingxue Gao; Jun Cai; Jenny Wang; Qing Liu

    \\u000a Exhibition Context Awareness User Study and UI Design for Growth Markets is a collaborative practice of Tsinghua University\\u000a Industrial Design Department and Nokia Research Center Beijing. The task of the project is to study the user needs and user\\u000a experiences in exhibitions for the application of uSD card being developed in Nokia, and probe the directions for other possible\\u000a applications

  18. Towards a Better Understanding of Context and Context-Awareness

    Microsoft Academic Search

    Anind K. Dey; Gregory D. Abowd

    2000-01-01

    The use of context is important in interactive applications. It is par- ticularly important for applications where the user's context is changing rap- idly, such as in both handheld and ubiquitous computing. In order to better un- derstand how we can use context and facilitate the building of context-aware applications, we need to more fully understand what constitutes a context-

  19. Research on Context-Aware Mobile Computing

    Microsoft Academic Search

    Li Han; Jyri P. Salomaa; Jian Ma; Kuifei Yu

    2008-01-01

    Context-aware mobile computing belongs to the field of ubiquitous computing. It aims to enable device to provide better service for people through applying available context information. In this paper, context-aware mobile computing was elaborated. Firstly, the history of definition of context was summarized, and then the new classification of human-centric context was proposed. The acquiring and application of context information

  20. The Context Toolkit: Aiding the Development of Context-Aware Applications

    Microsoft Academic Search

    Anind K. Dey; Gregory D. Abowd

    2000-01-01

    Context is an important, yet poorly understood and poorly utilized source of information in interactive computing. It will be of particular importance in the new millennium as users move away from their desktops and into settings where their contexts are changing rapidly. Context is difficult to use because, unlike other forms of user input, there is no common, reusable way

  1. A survey on context-aware systems

    Microsoft Academic Search

    Matthias Baldauf; Schahram Dustdar; Florian Rosenberg

    2007-01-01

    Abstract:Context-aware systems offer entirely new,opportunities for application developers and for end users by gathering,context data and adapting systems behaviour accordingly. Especially incombination,with mobile ,devices these mechanisms ,are of high ,value and ,are used to increase usability tremendously. In this paper, we present common architecture principles of context-aware systems and derive a layered conceptual design framework,to explain the different elements common

  2. Context-aware multi-factor authentication

    Microsoft Academic Search

    Luís Miranda; Henrique Domingos

    The advances in pervasive, ubiquitous and context-aware applications bring new challenges and opportunities for new authentication systems and protocols. Nowadays mobile devices have features that enable richer interaction models, providing pervasive and ubiquitous multi-factor authentication mechanisms that can be combined in a context-aware and multi-factor authentication environment. State-of-art single sign-on systems and authentication protocols are not well suited for a

  3. A Conceptual Framework and a Toolkit for Supporting the Rapid Prototyping of Context-Aware Applications.

    ERIC Educational Resources Information Center

    Dey, Anind K.; Abowd, Gregory D.; Salber, Daniel

    2001-01-01

    Discusses the trend toward ubiquitous computing and the challenge to enhance the behavior of any application by informing it of the context of its use. Defines context related to the interaction between humans, applications, and the surrounding environment; and presents a conceptual framework and a toolkit for supporting the rapid prototyping of…

  4. AIDS awareness: Indian context.

    PubMed

    Izhar, N

    1990-01-01

    A survey of the level of public awareness of AIDS in India was conducted on 600 men and women from Aligarth town, 180 km east of Delhi, and in Srinagar City in Kashmir Valley. Subjects were chosen from illiterate and below matriculate level; matriculate to graduate level; and graduate and above. Subjects were asked if they had heard of a disease called AIDS, when they first hears about AIDS, what was their 1st source of information, what are the reasons behind the incidence of AIDS and whether they are scared of AIDS. None of the illiterate group had heard of AIDS. 24% of the men and 14% of the women in the matriculate and graduate level group (clerks, mechanics, primary school teachers, businessmen and undergraduate students) had heard of AIDS. 92% of the highest educated group (lawyers, engineers, school principals and university students or teachers) had heard of AIDS. The 8% who had not were mostly women. Most of the highly educated, but fewer of the middle group were afraid of AIDS, but most thought AIDS would not spread in India because "our life pattern is different." None was aware that AIDS can spread from unchecked blood transfusions and re-use of unsterilized needles in hospitals. The most common information sources were newspapers, radio, magazines and friends. Most had not heard of AIDS from doctors or other health workers, or from television, which could be an extremely effective medium to reach people. PMID:2292385

  5. A Conceptual Framework and a Toolkit for Supporting the Rapid Prototyping of Context-Aware Applications

    Microsoft Academic Search

    Anind K. Dey; Gregory D. Abowd; Daniel Salber

    2001-01-01

    Abstract: Computing devices and applications are now used beyond the desktop, in diverseenvironments, and this trend toward ubiquitous computing is accelerating. One challenge thatremains in this emerging research field is the ability to enhance the behavior of any applicationby informing it of the context of its use. By context, we refer to any information thatcharacterizes a situation related to the

  6. ADAPTIVE, PLANNING BASED, WEB SERVICE COMPOSITION FOR CONTEXT AWARENESS

    Microsoft Academic Search

    Maja Vukovic; Peter Robinson

    The increasing complexity required for context awareness makes such applications difficult to write and adapt. In this paper, we present an architecture for building context aware applications as dynam- ically composed sequences of calls to fine granularity Web services, addressing the reactive behavior of pervasive environments. Different service compositions of such sequences will result from different contexts such as: devices

  7. A wireless public access infrastructure for supporting mobile context-aware IPv6 applications

    Microsoft Academic Search

    Adrian Friday; Maomao Wu; Stefan Schmid; Joe Finney; Keith Cheverst; Nigel Davies

    2001-01-01

    This paper presents a novel wireless access point architecturedesigned to support the development of next generation mobilecontext-aware applications over metropolitan scale areas. Inaddition, once deployed, this network will allow ordinary citizenssecure, accountable and convenient access to the Internet fromtheir local city and campus environments.The proposed architecture is based on an approach utilising amodified Mobile IPv6 protocol stack that uses packet

  8. Presence, Location, and Instant Messaging in a Context-Aware Application Framework

    Microsoft Academic Search

    Arjan J. H. Peddemors; Marc M. Lankhorst; Johan De Heer

    2003-01-01

    A mobile user's presence and location information often forms important input for those applications and services that must anticipate on the user's context. Additionally, the ability to let a mobile device determine its location in an indoor environment at a fine-grained level supports the creation of a new range of personalized mobile Internet applications. The framework described here joins the

  9. ACAN - Ad hoc Context Aware Network

    Microsoft Academic Search

    Mohamed Khedr; Ahmed Karmouch

    2002-01-01

    This paper presents the design and system architecture of the Ad hoc Context Aware Network (ACAN), a wireless environment with no pre-configuration and with spontaneous applications running according to the contextual situation. The ACAN is a new vision to the future of the wireless networks where it will consist of sensors that will capture the entities in the environment and

  10. Context-aware TCP\\/IP

    Microsoft Academic Search

    Carey L. Williamson; Qian Wu

    2002-01-01

    This paper discusses the design and evaluation of CATNIP, a Context-Aware Transport\\/Network Internet Protocol for the Web. This integrated protocol uses application-layer knowledge (i.e., Web document size) to provide explicit context information to the TCP and IP protocols. While this approach violates the traditional layered Internet protocol architecture, it enables informed decision-making, both at network endpoints and at network routers,

  11. A Survey of Context-Aware Mobile Computing Research

    Microsoft Academic Search

    Guanling Chen; David Kotz

    2000-01-01

    Context-aware computing is a mobile computing paradigm in which applications can discover and take advantage of contextual information (such as user location, time of day, nearby people and devices, and user activity). Since it was proposed about a decade ago, many researchers have studied this topic and built several context-aware applications to demonstrate the usefulness of this new technology. Context-aware

  12. Context-Aware Regulation of Context-Aware Mobile Services in Pervasive Computing Environments

    Microsoft Academic Search

    Evi Syukur; Seng Wai Loke

    2006-01-01

    \\u000a This paper discusses concepts, the design and prototype implementation of a context-aware policy system that governs mobile\\u000a services visibility and execution in pervasive computing environments. We view a pervasive environment as a collection of\\u000a mobile users, mobile services, contexts, policies and roles. Applicable policies are selected depending on the context of\\u000a users i.e., location, activity and the user’s role, and

  13. Minimalism context-aware displays.

    PubMed

    Cai, Yang

    2004-12-01

    Despite the rapid development of cyber technologies, today we still have very limited attention and communication bandwidth to process the increasing information flow. The goal of the study is to develop a context-aware filter to match the information load with particular needs and capacities. The functions include bandwidth-resolution trade-off and user context modeling. From the empirical lab studies, it is found that the resolution of images can be reduced in order of magnitude if the viewer knows that he/she is looking for particular features. The adaptive display queue is optimized with real-time operational conditions and user's inquiry history. Instead of measuring operator's behavior directly, ubiquitous computing models are developed to anticipate user's behavior from the operational environment data. A case study of the video stream monitoring for transit security is discussed in the paper. In addition, the author addresses the future direction of coherent human-machine vision systems. PMID:15687797

  14. Social networks and context-aware spam

    Microsoft Academic Search

    Garrett Brown; Travis Howe; Micheal Ihbe; Atul Prakash; Kevin Borders

    2008-01-01

    Social networks are popular for online communities. This paper evaluates the risk of sophisticated context-aware spam that could result from information sharing on social networks and discusses potential mitigation strategies. Unlike normal spam, context-aware spam would likely have a high click-through rate due to exploitation of authentic social connections. Context-aware spam could lead to more insidious attacks that try to

  15. Intelligent Fashion Interfaces. New challenges of classifying and standardizing for context awareness systems for smart applications of fibre computing in textiles, clothes and homes

    Microsoft Academic Search

    Astrid Ullsperger; BTU Cottbus

    The paper describes challenges of classifying and standardizing processes for context awareness systems for smart applications especially for fibre computing and wearable electronics. The focus will be on applications for intelligent fashion interfaces. One possibility for structuring new functions of embedded or wearable interfaces could be the 7 th skin model. Thinking in the near future especially \\

  16. Context-aware modeling of neuronal morphologies

    PubMed Central

    Torben-Nielsen, Benjamin; De Schutter, Erik

    2014-01-01

    Neuronal morphologies are pivotal for brain functioning: physical overlap between dendrites and axons constrain the circuit topology, and the precise shape and composition of dendrites determine the integration of inputs to produce an output signal. At the same time, morphologies are highly diverse and variant. The variance, presumably, originates from neurons developing in a densely packed brain substrate where they interact (e.g., repulsion or attraction) with other actors in this substrate. However, when studying neurons their context is never part of the analysis and they are treated as if they existed in isolation. Here we argue that to fully understand neuronal morphology and its variance it is important to consider neurons in relation to each other and to other actors in the surrounding brain substrate, i.e., their context. We propose a context-aware computational framework, NeuroMaC, in which large numbers of neurons can be grown simultaneously according to growth rules expressed in terms of interactions between the developing neuron and the surrounding brain substrate. As a proof of principle, we demonstrate that by using NeuroMaC we can generate accurate virtual morphologies of distinct classes both in isolation and as part of neuronal forests. Accuracy is validated against population statistics of experimentally reconstructed morphologies. We show that context-aware generation of neurons can explain characteristics of variation. Indeed, plausible variation is an inherent property of the morphologies generated by context-aware rules. We speculate about the applicability of this framework to investigate morphologies and circuits, to classify healthy and pathological morphologies, and to generate large quantities of morphologies for large-scale modeling. PMID:25249944

  17. Solar: A pervasive-computing infrastructure for context-aware mobile applications

    Microsoft Academic Search

    Guanling Chen; David Kotz

    2002-01-01

    Emerging pervasive computing technologies transform the way we live and work by embedding computation in our surrounding environment. To avoid increasing complexity, and allow the user to concentrate on her tasks, ap- plications must automatically adapt to their changing context, the physical and computational environment in which they run. To support these \\

  18. Toward adopting self-organizing models for the gamification of context-aware user applications

    Microsoft Academic Search

    Daniel J. Dubois

    2012-01-01

    Recent developments in the area of small and smart devices led to a massive spread of them, which, in some cases are replacing traditional computers for performing common activities such as web browsing. These devices are usually equipped with specialized hardware to sense and interact with the environment. In this context the use of self-organizing techniques has been widely used

  19. Real-Time Context-Aware Computing with Applications in Civil Infrastructure Systems A dissertation submitted in partial fulfillment

    E-print Network

    Kamat, Vineet R.

    covering the fundamentals of construction engineering and project management. I am grateful to Dr. Kristen of the Research 3 1.2.1 Previous Work in Context-Aware Decision-Making 4 1.2.1.1 Healthcare and Medical Industry 4

  20. Support online social interaction with Context-Awareness

    Microsoft Academic Search

    Yanlin Zheng; Luyi Li; Hiroaki Ogata; Yoneo Yano

    2007-01-01

    Social interaction is critical to knowledge building and sharing in online learning. This paper identifies knowledge, social and technical contexts as the three essential elements of the context space for online social interaction, and accordingly proposes a three-dimensional context-awareness (CA) model to support online social interaction, including Awareness to Knowledge Context, Awareness to Social Context, and Awareness to Technical Context.

  1. Configuring a context-aware middleware for Wireless Sensor Networks.

    PubMed

    Gámez, Nadia; Cubo, Javier; Fuentes, Lidia; Pimentel, Ernesto

    2012-01-01

    In the Future Internet, applications based on Wireless Sensor Networks will have to support reconfiguration with minimum human intervention, depending on dynamic context changes in their environment. These situations create a need for building these applications as adaptive software and including techniques that allow the context acquisition and decisions about adaptation. However, contexts use to be made up of complex information acquired from heterogeneous devices and user characteristics, making them difficult to manage. So, instead of building context-aware applications from scratch, we propose to use FamiWare, a family of middleware for Ambient Intelligence specifically designed to be aware of contexts in sensor and smartphone devices. It provides both, several monitoring services to acquire contexts from devices and users, and a context-awareness service to analyze and detect context changes. However, the current version of FamiWare does not allow the automatic incorporation related to the management of new contexts into the FamiWare family. To overcome this shortcoming, in this work, we first present how to model the context using a metamodel to define the contexts that must to be taken into account in an instantiation of FamiWare for a certain Ambient Intelligence system. Then, to configure a new context-aware version of FamiWare and to generate code ready-to-install within heterogeneous devices, we define a mapping that automatically transforms metamodel elements defining contexts into elements of the FamiWare family, and we also use the FamiWare configuration process to customize the new context-aware variant. Finally, we evaluate the benefits of our process, and we analyze both that the new version of the middleware works as expected and that it manages the contexts in an efficient way. PMID:23012505

  2. Context-Aware Recommendation by Aggregating User Context

    Microsoft Academic Search

    Dongmin Shin; Jae-won Lee; Jongheum Yeon; Sang-goo Lee

    2009-01-01

    Abstract— Traditional recommendation,approaches do not consider the changes of user preferences according to context. As a result, these approaches consider the user’s overall preferences, although the user preferences on items varies according to his\\/her context. However, in our context-aware approach, we take into account not only user preferences, but also context information. Our approach can be easily adopted for,content-based,and,collaborative filtering

  3. Context-aware service selection based on dynamic and static service attributes

    Microsoft Academic Search

    Steve Cuddy; Michael Katchabaw; Hanan Lutfiyya

    2005-01-01

    Context-aware applications are able to use context, which refers to information about the surrounding environment, to provide relevant information and\\/or services to the user. A context-aware application may need to make use of existing services (e.g., a print service). There may be several possible choices of services. The context-aware application should be able to discover and select a service that

  4. Distributed mediation of imperfectly sensed context in aware environments

    E-print Network

    Abowd, Gregory D.

    -Out Board for the home and a situation-aware reminder tool. KEYWORDS: context-aware computing, distributedDistributed mediation of imperfectly sensed context in aware environments Anind K. Dey, Jennifer context-aware services make the assumption that the context they are dealing with is correct. However

  5. Data-Centric Middleware for Context-Aware Pervasive Computing Guanling Chen

    E-print Network

    Kotz, David

    if not carefully managed. To minimize user distraction the applications must be aware of and adapt to the situationData-Centric Middleware for Context-Aware Pervasive Computing Guanling Chen , Ming Li , and David and deploying context-aware pervasive-computing applications calls for distributed software infrastructures

  6. An Infrastructure Approach to Context-Aware Computing

    Microsoft Academic Search

    Jason I. Hong; James A. Landay

    2001-01-01

    The Context Toolkit (Dey, Salber, and Abowd 2001 [this special issue]) is only oneof many possible architectures for supporting context-aware applications. In this essay,we look at the trade-offs involved with a service infrastructure approach to context-awarecomputing. We describe the advantages that a service infrastructure for contextawarenesshas over other approaches, outline some of the core technical challenges thatmust be addressed before

  7. A System Architecture for Context-Aware Mobile Computing

    Microsoft Academic Search

    William Noah Schilit

    1995-01-01

    A System Architecture for Context-Aware Mobile Computing William Noah Schilit Computer applications traditionally expect a static execution environment. However, this precondition is generally not possible for mobile systems, where the world around an application is constantly changing. This thesis explores how to support and also exploit the dynamic configurations and social settings characteristic of mobile systems. More specifically, it advances

  8. Context-Aware Mobile Information Access

    E-print Network

    Rajamani, Sriram K.

    , India #12;Mobile Phones 0 20 40 60 80 100 120 140 160 180 2003 2004 2005 2006 2007 2008 2009 2010 2011 on Mobile Phones 1. Microphone audio 2. Cell Radio location (100m-10km) 3. Bluetooth location (10-50m) 4Context-Aware Mobile Information Access Ram Ramjee Senior Researcher, Microsoft Research, Bangalore

  9. Practical Context Awareness for GSM Cell Phones

    Microsoft Academic Search

    Ian Anderson; Henk L. Muller

    2006-01-01

    The ability to provide context aware behaviour on a cell phone such as whether a user is walking or driving has previously only been possible via the use of additional hardware sensors such as an accelerometer. In this paper we show that by using GSM data such as signal strength fluctuation and changes to the monitored neighbouring cells it is

  10. Experiments on mobile context-aware instant messaging

    Microsoft Academic Search

    M. Perttunen; J. Riekki; K. Koskinen; M. Tahti

    2005-01-01

    In a ubiquitous context-aware system, the context of the users can be employed in managing communications. Instant messaging systems utilize awareness in communication and are commonly used to coordinate workplace collaborations. We describe a context-aware instant messaging prototype that aims to reduce unsuccessful communication attempts by updating the availability of the users automatically. The system utilizes the contexts of both

  11. Cyberguide: A mobile context-aware tour guide

    Microsoft Academic Search

    Gregory D. Abowd; Christopher G. Atkeson; Jason I. Hong; Sue Long; Rob Kooper; Mike Pinkerton

    1997-01-01

    Future computing environments will free the user from the constraints of the desktop. Applications for a mobile environment should take advantage of contextual information, such as position, to offer greater services to the user. In this paper, we present the Cyberguide project, in which we are building prototypes of a mobile context-aware tour guide. Knowledge of the user's current location,

  12. A case for context-aware TCP\\/IP

    Microsoft Academic Search

    Carey L. Williamson; Qian Wu

    2002-01-01

    This paper discusses the design and evaluation of CATNIP, a Context-Aware Transport\\/Network Internet Protocol for the Web. This integrated protocol uses application-layer knowledge (i.e., Web document size) to provide explicit context information to the TCP and IP protocols. While this approach violates the traditional layered Internet protocol architecture, it enables informed decision-making, both at network endpoints and at network touters,

  13. Context Awareness in a Handheld Exercise Agent

    PubMed Central

    Bickmore, Timothy W.; Mauer, Daniel; Brown, Thomas

    2009-01-01

    Work towards the development of a handheld health counseling agent designed to promote physical activity is described. Previous work on automated health counselors is discussed, along with the affordances of mobility and context awareness for health behavior interventions. We present a general-purpose software architecture for the rapid design and deployment of mobile health counseling agents. We also describe the results of an initial field trial in which such a mobile agent plays the role of an exercise coach designed to motivate users to walk more. Results were mixed. We found that the context awareness mechanism that was implemented for detecting walking led to greater user-agent social bonding, but less walking in study participants. PMID:20161031

  14. Context Aware On-line Diagramming Recognition

    Microsoft Academic Search

    Mudit Agrawal; Alexander Zotov; Ming Ye; Sashi Raghupathy

    2010-01-01

    This paper presents a context aware, online immediate-mode diagramming recognition and beautification software for hand-sketched diagrams. The system is independent of stroke-order, -number, -direction and is invariant to scaling, translation and rotation. In our stroke-based recognition model, we propose convexity features along with spatial and temporal proximity features to prune the combinatorial search space of possible stroke configurations to form

  15. Network Awareness, Social Context and Persuasion

    Microsoft Academic Search

    Donald Steiny

    2008-01-01

    This paper brings a sociological perspective to an area dominated by social psychology, that of persuasion. It discusses how\\u000a networks can be used to describe context for persuasive messages. It has been previously argued that network awareness, having\\u000a knowledge of how networks affect behavior and perception, combined with knowledge of the networks in some part of society\\u000a such as an

  16. Context-aware services for supply chain collaboration

    Microsoft Academic Search

    Li Weiping; Lin Huiping

    2011-01-01

    Context aware services can make an enterprise respond to its partners in the supply chain more quickly and timely, which will facilitate the collaboration among supply chain participates. This paper analysis the context aware services in the supply chain management. The context aware model of the purchase order management between the buyer and the supplier is given, followed by the

  17. Modeling Context Aware Interaction for Wayfinding using Mobile Devices

    E-print Network

    Bremen, Universität

    Modeling Context Aware Interaction for Wayfinding using Mobile Devices Chao Li CASA, University@informatik.uni-bremen.de ABSTRACT In this paper, we introduce and implement a model for context- aware interaction, and demonstrate the challenge of modeling context-awareness in dynamic interaction arising from wayfinding and navigation

  18. Context-aware sensing of physiological signals.

    PubMed

    Wu, Winston H; Batalin, Maxim A; Au, Lawrence K; Bui, Alex A T; Kaiser, William J

    2007-01-01

    Recent advancement in microsensor technology permits miniaturization of conventional physiological sensors. Combined with low-power, energy-aware embedded systems and low power wireless interfaces, these sensors now enable patient monitoring in home and workplace environments in addition to the clinic. Low energy operation is critical for meeting typical long operating lifetime requirements. Some of these physiological sensors, such as electrocardiographs (ECG), introduce large energy demand because of the need for high sampling rate and resolution, and also introduce limitations due to reduced user wearability. In this paper, we show how context-aware sensing can provide the required monitoring capability while eliminating the need for energy-intensive continuous ECG signal acquisition. We have implemented a wearable system based on standard widely-used handheld computing hardware components. This system relies on a new software architecture and an embedded inference engine developed for these standard platforms. The performance of the system is evaluated using experimental data sets acquired for subjects wearing this system during an exercise sequence. This same approach can be used in context-aware monitoring of diverse physiological signals in a patient's daily life. PMID:18003197

  19. Is Context-Aware Computing Taking Control away from the User? Three Levels of Interactivity Examined

    Microsoft Academic Search

    Louise Barkhuus; Anind K. Dey

    2003-01-01

    Context-aware computing promises a smooth interaction be- tween humans and technology but few studies have been conducted with regards to how interactive an application should be. After dening three levels of interactivity between a mobile computing device and its user: personalization, passive context-awareness and active context-awareness, we test which approach will limit users' perceived sense of control. We also investigate

  20. Chameleon: Context-Awareness inside DBMSs Hicham G. Elmongui #1

    E-print Network

    Mokbel, Mohamed F.

    Chameleon: Context-Awareness inside DBMSs Hicham G. Elmongui #1 , Walid G. Aref #2 , Mohamed F-- Context is any information used to characterize the situation of an entity. Examples of contexts includetime, location, identity, and activity of a user. This paper proposes a general context-aware DBMS

  1. Context-aware infrastructure for personalized healthcare.

    PubMed

    Zhang, Daqing; Yu, Zhiwen; Chin, Chung-Yau

    2005-01-01

    Ubiquitous computing is shifting healthcare from treatment by professionals in hospitals to self-care, mobile care, home care and preventive care. In order to support the healthcare evolution, a global healthcare system, which links healthcare service providers to an individual's personal and physical spaces, is expected to provide personalized healthcare services at the right time, right place and right manner. This paper presents an overall architecture for such a context-aware healthcare system. The key technologies such as device self-sensing mechanism, context processing framework and a service interoperability platform are identified and elaborated. A personalized healthcare adviser service has been described to illustrate how personalized healthcare can be well supported by the proposed infrastructure. PMID:16282665

  2. The Conference Assistant: Combining Context-Awareness with Wearable Anind K. Dey, Daniel Salber, Gregory D. Abowd

    E-print Network

    Abowd, Gregory D.

    The Conference Assistant: Combining Context-Awareness with Wearable Computing Anind K. Dey, Daniel mobile, context-aware application that assists conference attendees. We discuss the strong relationship between context-awareness and wearable computing and apply this relationship in the Conference Assistant

  3. Technical Feasibility of a Mobile Context-Aware (Social) Learning Schedule Framework

    ERIC Educational Resources Information Center

    Yau, Jane Y. K.; Joy, Mike

    2013-01-01

    The purpose of this paper is to show the technical feasibility of implementing their mobile context-aware learning schedule (mCALS) framework as a software application on a mobile device using current technologies, prior to its actual implementation. This process draws a set of compatible mobile and context-aware technologies at present and can be…

  4. Introduction to This Special Issue on Context-Aware Computing.

    ERIC Educational Resources Information Center

    Moran, Thomas P.; Dourish, Paul

    2001-01-01

    Discusses pervasive, or ubiquitous, computing; explains the notion of context; and defines context-aware computing as the key to disperse and enmesh computation into our lives. Considers context awareness in human-computer interaction and describes the broad topic areas of the essays included in this special issue. (LRW)

  5. Folksonomy-Based Information Retrieval in Context-aware Environment

    Microsoft Academic Search

    Sungrim Kim; Joonhee Kwon

    Summary The Web 2.0 approach has revolutionized the way we use the information system. An essential part of Web 2.0 is folksonomy. Most folksonomy-based systems do not consider new breed of context-aware retrieval. It requires the new convergence of folksonomy-based information retrieval and context-aware systems.We propose a folksonomy-based information retrieval in context-aware environment. We describe the procedure and some experiments

  6. Scalable Context Simulation for Mobile Applications

    Microsoft Academic Search

    Y. Liu; Michael J. O'grady; Gregory M. P. O'hare

    2006-01-01

    Abstract. Mobility, and, implicitly, context-awareness, offer significant opportunities to service,providers to augment,and differentiate their respective services. Though this potential has been long acknowledged, the dynamic nature,of a ,mobile ,user's context ,can lead ,to various ,difficulties when engineering mobile, context-aware applications. Classic software engineering elements are well understood in the fixed computing domain. However, the mobile,domain ,introduces further degrees of ,difficulty

  7. Solving LR Conflicts Through Context Aware Scanning

    NASA Astrophysics Data System (ADS)

    Leon, C. Rodriguez; Forte, L. Garcia

    2011-09-01

    This paper presents a new algorithm to compute the exact list of tokens expected by any LR syntax analyzer at any point of the scanning process. The lexer can, at any time, compute the exact list of valid tokens to return only tokens in this set. In the case than more than one matching token is in the valid set, the lexer can resort to a nested LR parser to disambiguate. Allowing nested LR parsing requires some slight modifications when building the LR parsing tables. We also show how LR parsers can parse conflictive and inherently ambiguous languages using a combination of nested parsing and context aware scanning. These expanded lexical analyzers can be generated from high level specifications.

  8. KnowSe: Fostering User Interaction Context Awareness

    E-print Network

    Paris-Sud XI, Université de

    KnowSe: Fostering User Interaction Context Awareness Andreas S. Rath, Didier Devaurs, and Stefanie the concept of awareness as a critical issue to focus on (Schmidt et al., 2002) since "users who work together is a lack of awareness in the organization (McArthur and Bruza, 2003), which not only leads to inefficient

  9. Addressing Context Awareness Techniques in Body Sensor Networks

    Microsoft Academic Search

    Barbara T. Korel; Simon G. M. Koo

    2007-01-01

    Context awareness in Body Sensor Networks (BSNs) has the significance of associating physiological user activity and environment to the sensed signals of the user. The con- text information derived in a BSN can be used in pervasive healthcare monitoring for relating importance to events and specifically for accurate episode detection. In this paper, we address the issues of context-aware sensing

  10. Context-aware Citation Recommendation Penn State University

    E-print Network

    Mitra, Prasenjit

    Context-aware Citation Recommendation Qi He Penn State University qhe@ist.psu.edu Jian Pei Simon When you write papers, how many times do you want to make some citations at a place but you present our initiative of building a context-aware citation recommendation system. High qual- ity citation

  11. MobileSOA: A Service Oriented Web 2.0 Framework for Context-Aware, Lightweight and Flexible Mobile Applications

    Microsoft Academic Search

    Anuraj Ennai; Siddhartha Bose

    2008-01-01

    Current enterprise application mobility approaches tend to extend desktop paradigms to the mobile space. We believe that enterprise application mobility needs to evolve to a mobile-oriented business computing paradigm, where business functions and relevant collaboration options are made available to a large number of mobile users in the most appropriate manner. In this paradigm, users get just enough information and

  12. Designing viable business models for context-aware mobile services

    Microsoft Academic Search

    Mark De Reuver; Timber Haaker

    2009-01-01

    Technologies of 3G and beyond open up new opportunities to develop and commercialize context-aware services that utilize information like user location and social context. Although initial expectations were high, the adoption and diffusion of context-aware services have thus far been limited. Existing literature points to failing business models to explain part of the disappointing uptake. However, most authors focus on

  13. The Design of a Context-Aware Home Media Space for Balancing Privacy and Awareness

    E-print Network

    Greenberg, Saul

    The Design of a Context-Aware Home Media Space for Balancing Privacy and Awareness Carman and awareness in video media spaces, like blur filtration, have been proven to be ineffective for com- promising home situations involving a media space. As such, this paper pre- sents the rationale and prototype

  14. Middleware Support for Context-Awareness in 4G Environments

    Microsoft Academic Search

    Thomas Springer; Kay Kadner; Frank Steuer; Ming Yin

    2006-01-01

    Context-awareness is a key technology for adaptive software systems. While past and recent research effort investigated the gathering of low-level information, implementation- and domain-driven approaches for context frameworks and conceptual models of context, vertical approaches combining the aspects of modeling, and implementation are still missing. In this paper, we propose a scalable and distributed context service for integrating heterogeneous context

  15. Policy Based Control of Context Aware Pervasive Services

    Microsoft Academic Search

    Evi Syukur; Seng Wai Loke

    While mobile computing technology is becoming more and more mature, the demand of having context sensing ability on any mobile or embedded systems is increasing rapidly. Context awareness is important if we want to give a mobile user autonomous, responsive and attentive services depending on his\\/her current contexts. To date, much research work have been developed to address some issues

  16. Bluetooth-Assisted Context-Awareness in Educational Data Networks

    ERIC Educational Resources Information Center

    Gonzalez-Castano, F. J.; Garcia-Reinoso, J.; Gil-Castineira, F.; Costa-Montenegro, E.; Pousada-Carballo, J. M.

    2005-01-01

    In this paper, we propose an auxiliary "location network", to support user-independent context-awareness in educational data networks; for example, to help visitors in a museum. We assume that, in such scenarios, there exist "service servers" that need to be aware of user location in real-time. Specifically, we propose the implementation of a…

  17. Towards a Common Context Model for Virtual Community Applications

    Microsoft Academic Search

    J. Indulska; K. Henricksen; T. McFadden; P. Mascaro

    2004-01-01

    Instrumentation of home appliances and devices with sensors and actua- tors enables the creation of smart, context-aware environments which can intelligently support users in a variety of tasks, including tasks that support independent living of the elderly. This paper describes how the complexity associated with designing and implementing context-aware applications can be reduced through both context reuse and programming methods

  18. Knowledge-based system to define context in commercial applications

    Microsoft Academic Search

    N. Sanchez-Pi; V. Fuentes; J. Carbo; J. M. Molina

    2007-01-01

    New wireless communications, user mobility and the growing need of taking into account the characteristics of the context make feasible the development of advanced frameworks to support context-aware knowledge systems. In this paper we present the design of the contextual information for an airport domain using a platform that exploits the modular and distributed architecture to develop context-aware applications.

  19. Context-aware mobile systems for managing services

    NASA Astrophysics Data System (ADS)

    Roening, Juha; Riekki, Jukka P.

    2001-10-01

    We propose context-aware mobile systems for managing and using services on the behalf of the user. Context-aware mobile systems perceive environmental signals, infer the context (i.e. the state of the system and its local environment) from these signals, and calculate appropriate actions for the detected context. In its simplest form, such a system can be a mobile telephone adjusting its profile based on the noise level and brightness of the environment. A personal robot equipped with a vision system and a manipulator is a more complex example of a context-aware mobile system. Context-aware mobile systems both manage the available services and use them on behalf of the user or guide the user in using them. A portable system offers a single interface for a variety of services. The role of a personal robot is to enhance some services so as to make them more suitable to the user. Both portable and robotic systems are controlled by a system capable of recognizing the user's context and reasoning out actions that would optimally serve the user in the situation at hand. In this paper, we will present our software architecture for context-aware service management and utilization, our approach for controlling personal robots, and our work on virtual and natural interfaces for interacting with a personal robot.

  20. A Middleware for Context-Aware Agents in Ubiquitous Computing Environments

    Microsoft Academic Search

    Anand Ranganathan; Roy H. Campbell

    2003-01-01

    Ubiquitous Computing advocates the construction of massively dis- tributed systems that help transform physical spaces into computationally active and intelligent environments. The design of systems and applications in these environments needs to take account of heterogeneous devices, mobile users and rapidly changing contexts. Most importantly, agents in ubiquitous and mobile environments need to be context-aware so that they can adapt

  1. A FRAMEWORK FOR THE MANAGEMENT OF CONTEXT-AWARE WORKFLOW SYSTEMS

    Microsoft Academic Search

    Liliana Ardissono; Roberto Furnari; Anna Goy; Giovanna Petrone; Marino Segnan

    This paper presents the CAWE framework for the context-aware management of applications based on the composition of Web Services in complex workflows. We introdu ce a representation of context-dependent activities based on an abstraction hierarchy which supports the specification of synthetic and clear workflows. Moreover, we propose a framework architecture which enriches the capabilities of a workflow engine in order

  2. Context-Aware Data Association and Authenticity in Pervasive Healthcare

    Microsoft Academic Search

    M. A. Chowdhury; J. Light

    2009-01-01

    This paper briefly explains the data association and security issues in pervasive health-care and proposes a context aware security approach to overcome these issues. Our algorithm gathers vital physiological, environmental and personal data to generate user context and uses that information to authenticate a specific patient.

  3. On Context-Aware Publish-Subscribe Gianpaolo Cugola

    E-print Network

    Tucci, Sara

    On Context-Aware Publish-Subscribe Gianpaolo Cugola Dip. Elettronica e Informazione Politecnico di to be communicated is pro- duced or consumed. Publish-subscribe, and particularly its content-based incarnation, is often used to convey this in- formation by encoding the "context" of the publisher into the published

  4. Towards a Better Understanding of Context and Context-Awareness

    Microsoft Academic Search

    Gregory D. Abowd; Anind K. Dey; Peter J. Brown; Nigel Davies; Mark Smith; Pete Steggles

    1999-01-01

    When humans talk with humans, they are able to use implicit situational information, or context, to increase the conversational bandwidth. Unfortunately, this ability to convey ideas does not transfer well to humans interacting with computers. In tradi-tional interactive computing, users have an impoverished mechanism for providing input to computers. By improving the computer's access to context, we increase the richness

  5. Context Shadow: An Infrastructure for Context Aware Computing

    Microsoft Academic Search

    Martin Jonsson; Patrik Werle

    In ubiquitous computing environments, hardware and software services will create huge and ubiquitous service spaces. These service spaces will need to be organized in meaningful ways so that the services can be easily accessed and utilized by other services and humans. Context Shadow is a system that makes it possible for services to ask questions about a person's current context,

  6. Context-Aware Reviewer Assignment for Trust Enhanced Peer Review

    PubMed Central

    Li, Lei; Wang, Yan; Liu, Guanfeng; Wang, Meng; Wu, Xindong

    2015-01-01

    Reviewer assignment is critical to peer review systems, such as peer-reviewed research conferences or peer-reviewed funding applications, and its effectiveness is a deep concern of all academics. However, there are some problems in existing peer review systems during reviewer assignment. For example, some of the reviewers are much more stringent than others, leading to an unfair final decision, i.e., some submissions (i.e., papers or applications) with better quality are rejected. In this paper, we propose a context-aware reviewer assignment for trust enhanced peer review. More specifically, in our approach, we first consider the research area specific expertise of reviewers, and the institution relevance and co-authorship between reviewers and authors, so that reviewers with the right expertise are assigned to the corresponding submissions without potential conflict of interest. In addition, we propose a novel cross-assignment paradigm, and reviewers are cross-assigned in order to avoid assigning a group of stringent reviewers or a group of lenient reviewers to the same submission. More importantly, on top of them, we propose an academic CONtext-aware expertise relevanCe oriEnted Reviewer cross-assignmenT approach (CONCERT), which aims to effectively estimate the “true” ratings of submissions based on the ratings from all reviewers, even though no prior knowledge exists about the distribution of stringent reviewers and lenient reviewers. The experiments illustrate that compared with existing approaches, our proposed CONCERT approach can less likely assign more than one stringent reviewers or lenient reviewers to a submission simultaneously and significantly reduce the influence of ratings from stringent reviewers and lenient reviewers, leading to trust enhanced peer review and selection, no matter what kind of distributions of stringent reviewers and lenient reviewers are. PMID:26090849

  7. Learning Browsing Patterns for Context-Aware Recommendation

    Microsoft Academic Search

    Daniela Godoy; Analía Amandi

    2006-01-01

    The success of personal information agents depends on their capacity to both identify relevant information for users and proactively\\u000a recommend context-relevant information. In this paper, we propose an approach to enable proactive context-aware recommendation\\u000a based on the knowledge of both user interests and browsing patterns. The proposed approach analyzes the browsing behavior\\u000a of users to derive a semantically enhanced context

  8. Context-Aware Adaptation in Web-Based Groupware Systems

    NASA Astrophysics Data System (ADS)

    Pinheiro, Manuele Kirsch; Carrillo-Ramos, Angela; Villanova-Oliver, Marlène; Gensel, Jérôme; Berbers, Yolande

    In this chapter, we propose a context-aware filtering process for adapting content delivered to mobile users by Web-based Groupware Systems. This process is based on context-aware profiles, expressing mobile users preferences for particular situations they encounter when using these systems. These profiles, which are shared between members of a given community, are exploited by the adaptation process in order to select and organize the delivered information into several levels of detail, based on a progressive access model. By defining these profiles, we propose a filtering process that considers both the user's current context and the user's preferences for this context. The context notion of context is represented by an object-oriented model we propose and which takes into account consideration both the user's physical and collaborative context, including elements related to collaborative activities performed inside the groupware system. The filtering process selects, in a first step, the context-aware profiles that match the user's current context, and then it filters the available content according to the selected profiles and uses the progressive access model to organize the selected information.

  9. Modeling and Analysis of Time-Critical Context-Aware Service Using Extended Interval Timed Colored Petri Nets

    Microsoft Academic Search

    Seungwok Han; Hee Yong Youn

    2012-01-01

    A context-aware system handling time-critical applications must satisfy explicit end-to-end time constraints which are highly dependent on the correlation between the dynamically changing contexts. To effectively deal with the timing constraints of context-aware systems, a methodology must be developed specifying the causal relationship between the contexts and timing aspect. To date, this issue has not yet been adequately addressed. In

  10. A Policy Based Framework for Context Aware Ubiquitous Services

    Microsoft Academic Search

    Evi Syukur; Seng Wai Loke; Peter Stañski

    2004-01-01

    \\u000a This paper introduces the idea of using a policy mechanism to control context aware behaviour for ubiquitous and mobile services.\\u000a The paper also discusses the usefulness, design architecture and prototype implementation of the Mobile Hanging Services framework\\u000a that supports proactive and ad hoc awareness services in ubiquitous environments. An approach for contextual services that\\u000a uses policies (a set of rules)

  11. A*Based Task Assignment Algorithm for Context-Aware Mobile Patient Monitoring Systems

    Microsoft Academic Search

    Hailiang Mei; Bert-jan Van Beijnum; Pravin Pawar; Ing Widya; Hermie Hermens

    2009-01-01

    Mobile Patient Monitoring System (MPMS) is positioned to provide high quality healthcare services in the near future. The gap between its application demands and resource supplies, however, still remains and may hinder this process. Dynamic context-aware adaptation mechanisms are required in order to meet the stringent requirements on such mission critical applications. The fundamental model underlying an MPMS includes a

  12. PLEXIL-DL: Language and Runtime for Context-Aware Robot Behaviour

    NASA Astrophysics Data System (ADS)

    Moser, Herwig; Reichelt, Toni; Oswald, Norbert; Förster, Stefan

    Faced with the growing complexity of application scenarios social robots are involved with, the perception of environmental circumstances and the sentient reactions are becoming more and more important abilities. Rather than regarding both abilities in isolation, the entire transformation process, from context-awareness to purposive behaviour, forms a robot’s adaptivity. While attaining context-awareness has received much attention in literature so far, translating it into appropriate actions still lacks a comprehensive approach. In this paper, we present PLEXIL-DL, an expressive language allowing complex context expressions as an integral part of constructs that define sophisticated behavioural reactions. Our approach extends NASA’s PLEXIL language by Description Logic queries, both in syntax and formal semantics. A prototypical implementation of a PLEXIL-DL interpreter shows the basic mechanisms facilitating the robot’s adaptivity through context-awareness.

  13. Context-Aware Online Commercial Intention Detection

    NASA Astrophysics Data System (ADS)

    Hu, Derek Hao; Shen, Dou; Sun, Jian-Tao; Yang, Qiang; Chen, Zheng

    With more and more commercial activities moving onto the Internet, people tend to purchase what they need through Internet or conduct some online research before the actual transactions happen. For many Web users, their online commercial activities start from submitting a search query to search engines. Just like the common Web search queries, the queries with commercial intention are usually very short. Recognizing the queries with commercial intention against the common queries will help search engines provide proper search results and advertisements, help Web users obtain the right information they desire and help the advertisers benefit from the potential transactions. However, the intentions behind a query vary a lot for users with different background and interest. The intentions can even be different for the same user, when the query is issued in different contexts. In this paper, we present a new algorithm framework based on skip-chain conditional random field (SCCRF) for automatically classifying Web queries according to context-based online commercial intention. We analyze our algorithm performance both theoretically and empirically. Extensive experiments on several real search engine log datasets show that our algorithm can improve more than 10% on F1 score than previous algorithms on commercial intention detection.

  14. Spatio-Temporal Reasoning and Context Awareness

    NASA Astrophysics Data System (ADS)

    Guesgen, Hans W.; Marsland, Stephen

    Smart homes provide many research challenges, but some of the most interesting ones are in dealing with data that monitors human behaviour and that is inherently both spatial and temporal in nature. This means that context becomes all important: a person lying down in front of the fireplace could be perfectly normal behaviour if it was cold and the fire was on, but otherwise it is unusual. In this example, the context can include temporal resolution on various scales (it is winter and therefore probably cold, it is not nighttime when the person would be expected to be in bed rather than the living room) as well as spatial (the person is lying in front of the fireplace) and extra information such as whether or not the fire is lit. It could also include information about how they reached their current situation: if they went from standing to lying very suddenly there would be rather more cause for concern than if they first knelt down and then lowered themselves onto the floor. Representing all of these different temporal and spatial aspects together is a major challenge for smart home research. In this chapter we will provide an overview of some of the methodologies that can be used to deal with these problems. We will also outline our own research agenda in the Massey University Smart Environments (MUSE) group.

  15. ON CONTEXT-AWARE ARTIFACTS AND SOCIALLY RESPONSIBLE DESIGN1

    Microsoft Academic Search

    Christopher Lueg

    Context-aware artifacts are of particular interest to HCI researchers as the user's interaction with artifacts moves from rather static desktops to less well-structured environments. Most work in developing such artifacts appears to be technology-driven by which we mean that often not much time is spent on exploring and clarifying the underlying concepts of context. In this paper, we attempt to

  16. Sharing Context-Aware Road and Safety Information

    Microsoft Academic Search

    José Santa; Antonio Fernandez Gómez-skarmeta

    2009-01-01

    We present an integrated vehicular system for the collection, management, and provision of context-aware information on traffic and driver location. This system uses an integrated vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communication paradigm enriched with an information management system. The infrastructure manages vehicle-detected safety hazards and other relevant information, adapting them to the vehicle's context and driver's preferences. This vehicular integrated

  17. An ontology for context-aware pervasive computing environments

    Microsoft Academic Search

    HARRY CHEN; TIM FININ; ANUPAM JOSHI

    2003-01-01

    This document describes COBRA-ONT an ontology for supporting pervasive context-aware systems. COBRA-ONT, expressed in the Web Ontology Language OWL, is a collection of ontologies for describing places, agents, events and their associated properties in an intelligent meeting room domain. This ontology is developed as a part of the Context Broker Architecture (CoBrA), a broker-centric agent architecture that provides knowledge sharing,

  18. Delivering adaptivity through context-awareness

    Microsoft Academic Search

    Michael J. O'grady; Gregory M. P. O'hare; C. Donaghey

    2007-01-01

    Abstract Developing,applications and,deploying,services for mobile,users raises a number,of issues and,challenges,that must,be successfully addressed,before,the era of truly ubiquitous computing will dawn. In particular, the desire to deploy rich multimedia applications and services is severely curtailed by the limited capabilities of the current range of mobile devices as well as the limited bandwidth,of current wireless cellular networks. How,best to overcome these,limitations,remains,the,focus,of,much,research. Intelligent

  19. Pragmatic Awareness in ESL and EFL Contexts: Contrast and Development

    ERIC Educational Resources Information Center

    Schauer, Gila A.

    2006-01-01

    The study reported on in this article set out to replicate and extend Bardovi-Harlig and Dornyei's (1998) investigation of pragmatic awareness by addressing two research questions: (a) Do learners in English as a foreign language (EFL) and English as a second language (ESL) contexts display differences in their recognition and rating of pragmatic…

  20. A Context Awareness System for Online Learning: Design Based Research

    ERIC Educational Resources Information Center

    Laffey, James; Amelung, Chris; Goggins, Sean

    2009-01-01

    A design based research strategy examining the impressions and behavior of members of courses taught entirely online is used for refining a context-aware activity notification system (CANS). The findings show that CANS must address substantial variety in courses and members while also fitting with multitasking between online and real world…

  1. Management Challenges of ContextAware Services in Ubiquitous Environments

    E-print Network

    paradigm of context­aware services (CASs). In recent years, a lot of research has covered the functional aspects of CASs. However, CASs in ubiquitous environ­ ments impose new management challenges, which has, high dynamic and automation are typical for CASs and evolve new management chal­ lenges. But management

  2. 809 (A Context-aware Mobile App Category Recommendation

    E-print Network

    Cho, Sung-Bae

    services, remote controls, media/video players Music & Audio Music services, radios, music players 809 (A Context-aware Mobile App Category Recommendation System with Bayesian that the proposed system is useful for recommending App category appropriate to users. Keywords: mobile app

  3. Mobile Context-aware Adaptation for the Cloud

    E-print Network

    Jones, Peter JS

    Volare Mobile Context-aware Adaptation for the Cloud Panagiotis Papakos A dissertation submitted of Computer Science University College London 3 October 2014 #12;Statement I, Panagiotis Papakos confirm service providers move their premises on the Cloud under the Software as a Service (SaaS) service model

  4. Context-Aware Office Assistant Hao Yan, Ted Selker

    E-print Network

    Automation INTRODUCTION This paper describes the design and implementation of the Office Assistant ­ an agentContext-Aware Office Assistant Hao Yan, Ted Selker MIT Media Laboratory 20 Ames St., E15-320N and implementation of the Office Assistant ­ an agent that interacts with visitors at the office door and manages

  5. Context-Aware Motion Diversification for Crowd Simulation*

    E-print Network

    Deng, Zhigang

    Diversification, Motion Variety, Variety Realism, Character Animation, User Study. I. INTRODUCTION Large-level motion information for every update (i.e., time step) through perception rules or social forcesContext-Aware Motion Diversification for Crowd Simulation* Qin Gu and Zhigang Deng Computer Science

  6. Siren: Context-aware Computing for Firefighting

    Microsoft Academic Search

    Xiaodong Jiang; Nicholas Y. Chen; Jason I. Hong; Kevin Wang; Leila Takayama; James A. Landay

    2004-01-01

    Based on an extensive field study of current firefighting practices, we have developed a system called Siren to support tacit communication between firefighters with multiple levels of redundancy in both communication and user alerts. Siren provides a foundation for gathering, integrating, and distributing contextual data, such as location and temperature. It also simplifies the devel- opment of firefighting applications using

  7. Context Aware Body Area Networks for Telemedicine

    Microsoft Academic Search

    V. M. Jones; Hailiang Mei; T. H. F. Broens; Ing Widya; J. Peuscher

    2007-01-01

    A Body Area Network (BAN) is a body worn system which provides the user with a set of mobile services. A BAN incorporates a set of devices (eg. mp3 player, video camera, speakers, microphone, head-up display, positioning device, sensors, actuators). A BAN service platform for mobile healthcare and several health BANs targetting different clinical applications have been devel- oped at

  8. MultiSensor Context Aware Clothing

    Microsoft Academic Search

    Kristof Van Laerhoven; Albrecht Schmidt; Hans-Werner Gellersen

    2002-01-01

    Inspired by perception in biological systems, distribution of a massive amount of simple sensing devices is gaining more support in detection applications. A focus on fusion of sensor signals instead of strong analysis algorithms, and a scheme to distribute sensors, results in new issues. Especially in wearable computing, where sensor data continuously changes, and clothing provides an ideal supporting structure

  9. A Stochastic Approach for Creating Context-aware Services based on Context Histories in Smart Home

    Microsoft Academic Search

    Hua Si; Yoshihiro Kawahara; Hiroyuki Morikawa; Tomonori Aoyama

    In this paper, we present a context-aware service platform called Synapse and its simple smart home test bed. By exploiting the recorded histories of contexts and services, Synapse can learn different users' habits. Then Synapse can predict the most relevant services that users will use in the current situation based on their habits, and provide services in Active Mode and

  10. Privacy in Georeferenced Context-Aware Services: A Survey

    NASA Astrophysics Data System (ADS)

    Riboni, Daniele; Pareschi, Linda; Bettini, Claudio

    Location based services (LBS) are a specific instance of a broader class of Internet services that are predicted to become popular in a near future: context-aware services. The privacy concerns that LBS have raised are likely to become even more serious when several context data, other than location and time, are sent to service providers as part of an Internet request. This paper provides a classification and a brief survey of the privacy preservation techniques that have been proposed for this type of services. After identifying the benefits and shortcomings of each class of techniques, the paper proposes a combined approach to achieve a more comprehensive solution for privacy preservation in georeferenced context-aware services.

  11. Context Awareness for Dynamic Service-Oriented Product Lines Carlos Parra, Xavier Blanc, and Laurence Duchien

    E-print Network

    Paris-Sud XI, Université de

    Context Awareness for Dynamic Service-Oriented Product Lines Carlos Parra, Xavier Blanc.parra, xavier.blanc, laurence.duchien}@inria.fr Abstract This paper introduces a Context-Aware Dynamic Soft in accordance with their using context. This DSPL, named CAPucine for Context-Aware Service-Oriented Product

  12. Opportunities and challenges for context-aware systems in aerospace industry

    Microsoft Academic Search

    Yifan Xie; Steve Culley; Frithjof Weber

    2011-01-01

    Purpose – The purpose of this paper is to discuss the current research and development status and future directions of context-aware systems (CAS) in the aerospace industry. Design\\/methodology\\/approach – The paper applies a layered framework to analyse the current status of research and development of CAS in the aerospace industry from the perspectives of middleware, applications and business users. The

  13. Design and Implementation of Context-Aware Musuem Guide Agents

    NASA Astrophysics Data System (ADS)

    Satoh, Ichiro

    This paper presents an agent-based system for building and operating context-aware services in public spaces, including museums. The system provides users with agents and detects the locations of users and deploys location-aware user-assistant agents at computers near the their current locations by using active RFID-tags. When a visitor moves between exhibits in a museum, this dynamically deploys his/her agent at the computers close to the exhibits by using mobile agent technology. It annotates the exhibits in his/her personalized form and navigate him/her user to the next exhibits along his/her routes. It also introduces user movement as a natural approach to interacting between users and agents. To demonstrate the utility and effectiveness of the system, we constructed location/user-aware visitor-guide services and experimented them for two weeks in a public museum.

  14. Patient satisfaction in a context-aware hospital guidance system.

    PubMed

    Kim, Eunhye; Yoo, Sooyoung; Hee, Hwang; Park, Hyunchul; Kim, Gunhee; Ha, Sungdo

    2012-01-01

    This paper presents the design of a system for a context-aware guidance service for hospital outpatients. Many patients have difficulties in knowing what to do and where to go due to the complexity of hospital-related processes and building structures. The intelligent hospital of the future will evolve in a smart way to automatically provide patients' smart mobile devices with relevant guidance information regarding their tasks, location, and process. In this study, we developed a context-aware-based hospital digital guidance system and evaluated ser satisfaction with respect to outpatient visits. From our pilot experiments with 15 outpatients, they were satisfied with the service. We believe that such a smart system would be a promising model for developing the intelligent hospitals of the future. PMID:22874392

  15. Context Awareness through Cross-Layer Network Architecture

    Microsoft Academic Search

    Mohammad Abdur Razzaque; Simon Dobson; Paddy Nixon

    2007-01-01

    Layered architectures are not sufficiently flexible to cope with the dynamics of wireless-dominated next generation communications. Cross-layer approaches may provide a better solution: allowing interactions between two or more non-adjacent layers in the protocol stack. Cross-layer architectures based on purely local information will not be able to support system-wide cross-layer performance optimization, context-awareness, etc. A new cross-layer architecture which provides

  16. Secure Data Flow in a Calculus for Context Awareness

    Microsoft Academic Search

    Doina Bucur; Mogens Nielsen

    2008-01-01

    WepresentaMobile-Ambients-based processcalculustode- scribe context-aware computing in an infrastructure-based Ubiquitous Computing setting. In our calculus, computing agents can provide and discover contextual information and are owners of security policies. Sim- pleaccesscontroltocontextualinformationisnotsu-cienttoinsurecon- fldentiality in Global Computing, therefore our security policies regulate agents' rights to the provision and discovery of contextual information over distributed ?ows of actions. A type system enforcing security poli-

  17. A Framework for Context-Aware Adaptation in Public Displays

    Microsoft Academic Search

    Jorge C. S. Cardoso; Rui José

    2009-01-01

    Several approaches for context-aware public display systems exist but none has been able to bridge the gap between the myriad\\u000a of possible interactive features of a display and adaptation rules for its content. In this paper, we propose a framework\\u000a of digital footprints generated by the interaction with public displays that can be used as a means to dynamically characterise

  18. Context-Awareness and Adaptation in Distributed Event-Based Systems

    E-print Network

    Waterloo, University of

    Context-Awareness and Adaptation in Distributed Event-Based Systems Eduardo S. Barrenechea, Paulo S of Waterloo Technical Report CS-2011-14 Abstract Context-aware and proactive technologies have been through events. Although there have been significant advances in distributed context-aware systems

  19. An Intelligent Broker for Context-Aware Systems University of Maryland

    E-print Network

    Finin, Tim

    (CoBrA) ­ a new architecture for supporting context-aware systems in smart spaces. Our architecture an intelligent meeting room. Keywords Context-aware systems, smart spaces, semantic web, agent architecture 1 that aims to help devices, services and agents to become context aware in smart spaces

  20. CATS: Context-Aware Triggering System for Next Generation Networks

    NASA Astrophysics Data System (ADS)

    Simoes, José; Goncalves, João; Mota, Telma; Magedanz, Thomas

    Considering context information, namely location, in order to create new services has become a commercial trend. The innovative approaches that context-aware mechanisms make possible are being targeted by service providers of diverse areas. On the other hand, Service Oriented Architectures play a central role in allowing component reuse and low cost service creation. Together with IP Multimedia Subsystem enable the convergence of telecommunications and web services, allowing the network transport technologies to be abstracted from the services above. By integrating these three technologies, a number of synergies can be explored. Existing services can be easily enriched with context information, made available on a variety of networks and new services can be composed using previously existing building blocks. This paper explains how this integration can be achieved, and demonstrates the potentialities of this architectural paradigm with a prototype service.

  1. Body sensor network based context aware QRS detection.

    PubMed

    Li, Huaming; Tan, Jindong

    2006-01-01

    In this paper, a body sensor network (BSN) based context aware QRS detection scheme is proposed. The algorithm uses the context information provided by the body sensor network to improve the QRS detection performance by dynamically selecting the leads with best SNR and taking advantage of the best features of two complementary detection algorithms. The accelerometer data from the BSN are used to classify the patients' daily activity and provide the context information. The classification results indicate both the type of the activities and their corresponding intensity, which is related to the signal/noise ratio of the ECG recordings. Activity intensity is first fed to lead selector to eliminate the leads with low SNR, and then is fed to a selector for selecting a proper QRS detector according to the noise level. MIT-BIH noise stress test database is used to evaluate the algorithms. PMID:17946171

  2. Inferring Presence in a Context-Aware Instant Messaging System

    Microsoft Academic Search

    Mikko Perttunen; Jukka Riekki

    2004-01-01

    The increasing volume of digital communication is raising new chal- lenges in the management of the information flow. We discuss the usage of con- text to infer presence information automatically for instant messaging applica- tions. This results in easy-to-use applications and more reliable presence information. We suggest a new model, context relation, for representing the contexts that are relevant for

  3. UNIVERSITY OF CALGARY Context-Aware Personal Navigation Services Using Multi-level Sensor Fusion Algorithms

    E-print Network

    Calgary, University of

    UNIVERSITY OF CALGARY Context-Aware Personal Navigation Services Using Multi-level Sensor Fusion adaptation. The proposed context-aware PNS approach is using low-cost multi-sensor data in a multi-level, and finding the most accurate context. The context reasoning technique uses a fuzzy decision-level fusion

  4. Healthcare Information Fusion Using Context-Aware Agents

    NASA Astrophysics Data System (ADS)

    Tapia, Dante I.; Fraile, Juan A.; de Luis, Ana; Bajo, Javier

    Context aware systems have evolved into complex information systems capable of providing large quantities of information obtained from network sensors with heterogeneous characteristics. This article proposes a multi-agent system that monitors patients and maintains a permanent fix on their location within a given context. The system uses information provided by sensors distributed throughout the environment. The system agents take the information they receive and fuse it to improve the decisions and actions involved in their processing. The multi-agent system implements a SOA-based platform, which allows heterogeneous Wireless Sensor Networks to communicate in a distributed way. This article presents the evaluation of the solutions provided by the agents through the information flow for the organization.

  5. Design of a context-aware model to enhance medication adherence.

    PubMed

    Lim, Myungeun; Choi, Jae-Hun; Bang, Sun-Lee; Kim, Dae-Hee; Park, Soo-Jun

    2009-01-01

    Medication adherence is important to patients who suffer from chronic disease. Regular medication activity reduces the cost of caring disease and prohibits the worsening of disease condition. To support patients taking medicine correctly, we developed a medication assistance system which alarms medication situation through multimedia messages and help patients to take a medicine. To enable the system copes with various situations related to a medication service, we designed a medication context model and implemented a state based context aware application. We also applied our system to patients and saw a little improvement in medication adherence. PMID:19964115

  6. Personalized Context-Aware Ubiquitous Learning System for Supporting Effectively English Vocabulary Learning

    Microsoft Academic Search

    Chih-ming Chen; Yi-lun Li; Ming-chuan Chen

    2007-01-01

    With the rapid growth of wireless techniques, the mobile learning by the handheld devices has been gradually considered as a novel learning form. Developing context-aware ubiquitous learning environment can bring the most desired learning services for learners. Accordingly, this study proposed a personalized context-aware ubiquitous english vocabulary learning system which can exploit appropriate context based on learner's location, leisure learning

  7. Examining a Bayesian Approach to Personalizing Context Awareness in Ubiquitous Computing Environments

    NASA Astrophysics Data System (ADS)

    Mowafi, Yaser; Zhang, Dongsong; Fogionne, Guisseppi

    There is a growing interest in the use of context-aware systems, which can recognize user’s situational context and accordingly provide a desirable interaction with the user. However, the design, development, evaluation and deployment of context-aware systems are still at its infancy. In this paper, we propose an operational mechanism approach to context acquisition driven by the relevant dependency between users’ ongoing activities and context in ubiquitous computing environments. We present a Bayesian model to classify and predict users’ activities and associated context that offers more interactive and construed context awareness to users. The model performance is examined in terms of its classification accuracy in predicting users’ activities and the associated context trends. The results demonstrate that such probabilistic models can provide an effective and feasible approach to learning and predicting users’ context that can yield further the development of deployable context-aware systems.

  8. Context-aware mobile assistants for optimal interaction: a prototype for supporting the business traveler

    Microsoft Academic Search

    Patrick Hertzog; Marc Torrens

    2004-01-01

    Travel has many situations where context-aware computing can bring important benefits: pointing out notorious delays or bad weather during the planning phase, allowing the user to replan for handling unexpected situations, or suggesting flight alternatives to avoid strikes.This paper briefly describes an approach for integrating context-aware computing to a mobile travel assistant. We show how context-aware techniques can ease user

  9. Context-Aware Service Utilisation in the Clouds and Energy Conservation

    E-print Network

    Kiani, Saad Liaquat; Antonopoulos, Nick; Knappmeyer, Michael; Baker, Nigel; McClatchey, Richard

    2012-01-01

    Ubiquitous computing environments are characterised by smart, interconnected artefacts embedded in our physical world that are projected to provide useful services to human inhabitants unobtrusively. Mobile devices are becoming the primary tools of human interaction with these embedded artefacts and utilisation of services available in smart computing environments such as clouds. Advancements in capabilities of mobile devices allow a number of user and environment related context consumers to be hosted on these devices. Without a coordinating component, these context consumers and providers are a potential burden on device resources; specifically the effect of uncoordinated computation and communication with cloud-enabled services can negatively impact the battery life. Therefore energy conservation is a major concern in realising the collaboration and utilisation of mobile device based context-aware applications and cloud based services. This paper presents the concept of a context-brokering component to aid...

  10. Global-Aware and Multi-Order Context-Based Prefetching for High-Performance Processors

    SciTech Connect

    Chen, Yong [ORNL; Zhu, Huaiyu [Illinois Institute of Technology; Roth, Philip C [ORNL; Jin, Hui [Illinois Institute of Technology; Sun, Xian-He [Illinois Institute of Technology

    2011-01-01

    Data prefetching is widely used in high-end computing systems to accelerate data accesses and to bridge the increasing performance gap between processor and memory. Context-based prefetching has become a primary focus of study in recent years due to its general applicability. However, current context-based prefetchers only adopt the context analysis of a single order, which suffers from low prefetching coverage and thus limits the overall prefetching effectiveness. Also, existing approaches usually consider the context of the address stream from a single instruction but not the context of the address stream from all instructions, which further limits the context-based prefetching effectiveness. In this study, we propose a new context-based prefetcher called the Global-aware and Multi-order Context-based (GMC) prefetcher. The GMC prefetcher uses multi-order, local and global context analysis to increase prefetching coverage while maintaining prefetching accuracy. In extensive simulation testing of the SPEC-CPU2006 benchmarks with an enhanced CMP$im simulator, the proposed GMC prefetcher was shown to outperform existing prefetchers and to reduce the data-access latency effectively. The average Instructions Per Cycle (IPC) improvement of SPEC CINT2006 and CFP2006 benchmarks with GMC prefetching was over 55% and 44% respectively.

  11. Semantic web technologies to reconcile privacy and context awareness

    Microsoft Academic Search

    Fabien L. Gandon; Norman M. Sadeh

    2004-01-01

    Increasingly, application developers are looking for ways to provide users with higher levels of personalization that capture different elements of a user's operating context, such as her location, the task that she is currently engaged in, who her colleagues are, etc. While there are many sources of contextual information, they tend to vary from one user to another and also

  12. An FSM model for situation-aware mobile application software systems

    Microsoft Academic Search

    Yu Wang

    2004-01-01

    Situation-awareness is a desirable feature of application software systems in mobile computing environments. In this paper, we present an extended finite state machine model for the situation-aware mobile application software systems. In this model, each state represents an impromptu condition that a system is presented, and the state is characterized by the historical context record and the internal action record.

  13. Context-Aware Role-based Access Control in Pervasive Computing Systems

    E-print Network

    Minnesota, University of

    ,tripathi)@cs.umn.edu ABSTRACT In this paper we present a context-aware RBAC (CA- RBAC) model for pervasive computing, Pervasive Computing, Context- based Access Control, RBAC This work was supported by NSF grants 0411961

  14. Awareness Checklist: Reviewing the Quality of Awareness Support in Collaborative Applications

    E-print Network

    Antunes, Pedro

    Awareness Checklist: Reviewing the Quality of Awareness Support in Collaborative Applications Pedro {jpino, vherskov, sochoa}@dcc.uchile.cl Abstract. A proposal of a method to assess awareness support use in two cases. Key words: Awareness Inspection, Collaborative Applications. 1 Introduction

  15. Semester Project: Shape Sensing, Context Aware Garment ECE 5984 Wearable & Ubiquitous Computing

    E-print Network

    Semester Project: Shape Sensing, Context Aware Garment ECE 5984 Wearable & Ubiquitous Computing to explore the design space of a shape-sensing context-aware garment, specifically, to meet the requirements-textiles represent the merging of everyday garments, fabrics, etc. with various computational elements. Despite being

  16. InCarMusic: Context-Aware Music Recommendations in a Car

    E-print Network

    Ricci, Francesco

    InCarMusic: Context-Aware Music Recommendations in a Car Linas Baltrunas1 , Marius Kaminskas1-10587 Berlin, Germany Karl-Heinz.Lueke@telekom.de Abstract. Context aware recommender systems (CARS recommendations while the user is traveling by car should take into account the current traffic condition

  17. Developing a Survey for Assessing Preferences in Constructivist Context-Aware Ubiquitous Learning Environments

    ERIC Educational Resources Information Center

    Tsai, P.-S.; Tsai, C.-C.; Hwang, G.-J.

    2012-01-01

    This study developed a survey to explore students' preferences in constructivist context-aware ubiquitous learning environments. A constructivist context-aware ubiquitous learning (u-learning) environment survey (CULES) was developed, consisting of eight scales, including ease of use, continuity, relevance, adaptive content, multiple sources,…

  18. A Systematic Design Tool of Context Aware System for Ubiquitous Healthcare Service in a Smart Home

    Microsoft Academic Search

    Dong-oh Kang; Kyuchang Kang; Hyung-jik Lee; Eun-jung Ko; Jeunwoo Lee

    2007-01-01

    Recent developments of information technologies are leading the advent of the era of ubiquitous healthcare service, which means healthcare services at any time and at any places. In a home, the ubiquitous healthcare service requires some context aware system for smart services using home network. In this paper, we propose a systematic design tool of a context aware system for

  19. A modular design of Bayesian networks using expert knowledge: Context-aware home service robot

    E-print Network

    Cho, Sung-Bae

    functional capabilities due to aging or disability (Brose et al., 2010), and personal robots group in MITA modular design of Bayesian networks using expert knowledge: Context-aware home service robot Han: Modeling Bayesian networks High-level context-awareness Modular design Service robot Domain knowledge a b

  20. Learning in a u-Museum: Developing a Context-Aware Ubiquitous Learning Environment

    ERIC Educational Resources Information Center

    Chen, Chia-Chen; Huang, Tien-Chi

    2012-01-01

    Context-awareness techniques can support learners in learning without time or location constraints by using mobile devices and associated learning activities in a real learning environment. Enrichment of context-aware technologies has enabled students to learn in an environment that integrates learning resources from both the real world and the…

  1. Survey on Context-Aware Publish/Subscribe systems for VANET

    E-print Network

    Paris-Sud XI, Université de

    Survey on Context-Aware Publish/Subscribe systems for VANET Mickaël Royer, Alain Pirovano, Fabien of mobile networks such as VANETs is still an open research topic. In particular, the communication needs a survey on these context-aware publish / subscribe solutions for VANETs. We will particularly focus our

  2. The Design of a Context-Aware Home Media Space: Carman Neustaedter & Saul Greenberg

    E-print Network

    Greenberg, Saul

    The Design of a Context-Aware Home Media Space: The Video Carman Neustaedter & Saul Greenberg media spaces have been proven to be ineffective for compromising home situations involving a media space. As such, we present the rationale and prototype design of a context-aware home media space (HMS

  3. Towards Context-Aware Task Recommendation Chuong Cong Vo, Torab Torabi and Seng W. Loke

    E-print Network

    Loke, Seng W. - Loke, Seng W.

    Towards Context-Aware Task Recommendation Chuong Cong Vo, Torab Torabi and Seng W. Loke Department and what tasks a PCE supports. Our ongoing research aims to minimise this overload by proposing a context-aware and relevant tasks for users according to user's situation and environment capabilities. This paper formalises

  4. A Heuristic Algorithm for Planning Personalized Learning Paths for Context-Aware Ubiquitous Learning

    ERIC Educational Resources Information Center

    Hwang, Gwo-Jen; Kuo, Fan-Ray; Yin, Peng-Yeng; Chuang, Kuo-Hsien

    2010-01-01

    In a context-aware ubiquitous learning environment, learning systems can detect students' learning behaviors in the real-world with the help of context-aware (sensor) technology; that is, students can be guided to observe or operate real-world objects with personalized support from the digital world. In this study, an optimization problem that…

  5. Agile Application-Aware Adaptation for Mobility

    Microsoft Academic Search

    Brian D. Noble; Mahadev Satyanarayanan; Dushyanth Narayanan; James Eric Tilton; Jason Flinn; Kevin R. Walker

    1997-01-01

    In this paper we show that application-aware adaptation, a collaborative partnership between the operating system and applications, offers the most general and effective approach to mobile information access. We describe the design of Odyssey, a prototype implementing this approach, and show how it supports concurrent execution of diverse mobile ap- plications. We identify agility as a key attribute of adap-

  6. An Infrastructure to Enable Lightweight Context-Awareness for Mobile Users

    PubMed Central

    Curiel, Pablo; Lago, Ana B.

    2013-01-01

    Mobile phones enable us to carry out a wider range of tasks every day, and as a result they have become more ubiquitous than ever. However, they are still more limited in terms of processing power and interaction capabilities than traditional computers, and the often distracting and time-constricted scenarios in which we use them do not help in alleviating these limitations. Context-awareness is a valuable technique to address these issues, as it enables to adapt application behaviour to each situation. In this paper we present a context management infrastructure for mobile environments, aimed at controlling context information life-cycle in this kind of scenarios, with the main goal of enabling application and services to adapt their behaviour to better meet end-user needs. This infrastructure relies on semantic technologies and open standards to improve interoperability, and is based on a central element, the context manager. This element acts as a central context repository and takes most of the computational burden derived from dealing with this kind of information, thus relieving from these tasks to more resource-scarce devices in the system. PMID:23899932

  7. Modeling Battery Behavior on Sensory Operations for Context-Aware Smartphone Sensing

    PubMed Central

    Yurur, Ozgur; Liu, Chi Harold; Moreno, Wilfrido

    2015-01-01

    Energy consumption is a major concern in context-aware smartphone sensing. This paper first studies mobile device-based battery modeling, which adopts the kinetic battery model (KiBaM), under the scope of battery non-linearities with respect to variant loads. Second, this paper models the energy consumption behavior of accelerometers analytically and then provides extensive simulation results and a smartphone application to examine the proposed sensor model. Third, a Markov reward process is integrated to create energy consumption profiles, linking with sensory operations and their effects on battery non-linearity. Energy consumption profiles consist of different pairs of duty cycles and sampling frequencies during sensory operations. Furthermore, the total energy cost by each profile is represented by an accumulated reward in this process. Finally, three different methods are proposed on the evolution of the reward process, to present the linkage between different usage patterns on the accelerometer sensor through a smartphone application and the battery behavior. By doing this, this paper aims at achieving a fine efficiency in power consumption caused by sensory operations, while maintaining the accuracy of smartphone applications based on sensor usages. More importantly, this study intends that modeling the battery non-linearities together with investigating the effects of different usage patterns in sensory operations in terms of the power consumption and the battery discharge may lead to discovering optimal energy reduction strategies to extend the battery lifetime and help a continual improvement in context-aware mobile services. PMID:26016916

  8. A Three-Dimensional Context-Awareness Model for Peer Recommendation in the E-Learning Context

    ERIC Educational Resources Information Center

    Zheng, Yanlin; Li, Luyi

    2008-01-01

    It is widely recognized that peer interaction is valuable for improving learning and achievement. This article proposes a three-dimensional context-awareness (CA) model to help learners in distributed e-learning settings to find suitable peers for potential collaboration. Based on the recognition of the e-learning context that involves the…

  9. Graphs and Patterns for Context-Awareness Andrei Olaru and Adina Magda Florea and Amal El Fallah Seghrouchni

    E-print Network

    Paris-Sud XI, Université de

    Graphs and Patterns for Context-Awareness Andrei Olaru and Adina Magda Florea and Amal El Fallah Seghrouchni Abstract A central issue in the domain of Ambient Intelligence is context - aware- ness. While previous research in the field presents complex context-aware infras- tructures, but with little

  10. Investigating context-aware clues to assist navigation for visually impaired people

    E-print Network

    Dunlop, Mark D.

    Investigating context-aware clues to assist navigation for visually impaired people Nicholas A of traditional mobility aids (i.e. white canes and guide dogs) coupled with a proliferation of context with their environmental context during micro-navigation (through immediate environment) and/or macro-navigation (through

  11. Online Evolutionary Context-Aware Classifier Ensemble Framework For Object Recognition

    Microsoft Academic Search

    Zhan Yu; Mi Young Nam; Phill-Kyu Rhee

    2009-01-01

    In this paper, we propose an online evolutionary context-aware classifier ensemble framework for object recognition systems which are adaptive to various environments. The starting point utilizes a context recognizer, a context knowledge base and a classifier ensemble generator to provide optimal solutions for classifier ensemble. Even though our framework is quite general and could be applied to various classification tasks,

  12. Mobile Intelligence: Enabling a New Class of Context-aware Services

    E-print Network

    Hammerton, James

    Mobile Intelligence: Enabling a New Class of Context- aware Services G. M. P. O'Hare, M.J. O'Grady of Computer Science, University College Dublin (UCD), Belfield, Dublin 4, Ireland. {gregory.ohare, michael

  13. A Context-Aware Streaming Agent Method for Optimal Seamless Service in a Vertical Handover Environment

    Microsoft Academic Search

    Inwhee Joe; Jong-Yong Park

    2010-01-01

    \\u000a We propose a novel context-aware streaming agent to achieve optimal high quality seamless streaming service in heterogeneous\\u000a wireless networks and mobile terminals and to utilize high WLAN bandwidth in mobile phones. The major difference between our\\u000a proposed method and existing methods is the use of mobile terminal oriented context-aware streaming adaptation. We outline\\u000a a streaming network architecture among the streaming

  14. Autonomous hybrid pull-push Context-aware community service dissemination technology to achieve high assurance

    Microsoft Academic Search

    Khalid Mahmood; Satoshi Niki; Xiaodong Lu; Kinji Mori

    2009-01-01

    Community time-distance-oriented context-aware information environment (CTCIE) incorporates time-awareness and demand-oriented perspectives to revamp one-dimensional rudimentary location based services (LBS) into three dimensional community pervasive services (CPS). The proposed Autonomous Decentralized Community System (ADCS) framework enables provision of customized CPS to specific users in specific place at specific time. ADCS employs novel idea of ripple-based multi-target context-cognizant service discovery (RMCSD) technique

  15. Context-aware access control for pervasive access to process-based healthcare systems.

    PubMed

    Koufi, Vassiliki; Vassilacopoulos, George

    2008-01-01

    Healthcare is an increasingly collaborative enterprise involving a broad range of healthcare services provided by many individuals and organizations. Grid technology has been widely recognized as a means for integrating disparate computing resources in the healthcare field. Moreover, Grid portal applications can be developed on a wireless and mobile infrastructure to execute healthcare processes which, in turn, can provide remote access to Grid database services. Such an environment provides ubiquitous and pervasive access to integrated healthcare services at the point of care, thus improving healthcare quality. In such environments, the ability to provide an effective access control mechanism that meets the requirement of the least privilege principle is essential. Adherence to the least privilege principle requires continuous adjustments of user permissions in order to adapt to the current situation. This paper presents a context-aware access control mechanism for HDGPortal, a Grid portal application which provides access to workflow-based healthcare processes using wireless Personal Digital Assistants. The proposed mechanism builds upon and enhances security mechanisms provided by the Grid Security Infrastructure. It provides tight, just-in-time permissions so that authorized users get access to specific objects according to the current context. These permissions are subject to continuous adjustments triggered by the changing context. Thus, the risk of compromising information integrity during task executions is reduced. PMID:18487810

  16. Management Challenges of Context-Aware Services in Ubiquitous Environments

    E-print Network

    -aware services (CASs). In recent years, a lot of research has covered the functional aspects of CASs. However, CASs in ubiquitous environ- ments impose new management challenges, which has not been considered so dynamic and automation are typical for CASs and evolve new management chal- lenges. But management issues

  17. Context-Aware Computing: The CyberDesk Project

    Microsoft Academic Search

    Anind K. Dey

    1998-01-01

    The CyberDesk project is aimed at providing a software architecture that dynamically integrates software modules. This integration is driven by a user's context, where context includes the user's physical, social, emotional, and mental (focus-of-attention) environments. While a user's context changes in all settings, it tends to change most frequently in a mobile setting. We have used the CyberDesk system in

  18. Learning of context-aware single image super-resolution

    Microsoft Academic Search

    Min-Chun Yang; Ting-Yao Hu; Chang-Heng Wang; Yu-Chiang Frank Wang

    2011-01-01

    We propose a novel learning-based method for single image super-resolution (SR). Given a low-resolution input image and its image pyramid, we advance a context-constrained image segmentation to construct a super-pixel database with different context categories for learning purposes. By utilizing context-specific image sparse representation, our method aims at modeling the relationship between the interpolated image patches and their ground truth

  19. Context-aware brain-computer interfaces: exploring the information space of user, technical system and environment.

    PubMed

    Zander, T O; Jatzev, S

    2012-02-01

    Brain-computer interface (BCI) systems are usually applied in highly controlled environments such as research laboratories or clinical setups. However, many BCI-based applications are implemented in more complex environments. For example, patients might want to use a BCI system at home, and users without disabilities could benefit from BCI systems in special working environments. In these contexts, it might be more difficult to reliably infer information about brain activity, because many intervening factors add up and disturb the BCI feature space. One solution for this problem would be adding context awareness to the system. We propose to augment the available information space with additional channels carrying information about the user state, the environment and the technical system. In particular, passive BCI systems seem to be capable of adding highly relevant context information-otherwise covert aspects of user state. In this paper, we present a theoretical framework based on general human-machine system research for adding context awareness to a BCI system. Building on that, we present results from a study on a passive BCI, which allows access to the covert aspect of user state related to the perceived loss of control. This study is a proof of concept and demonstrates that context awareness could beneficially be implemented in and combined with a BCI system or a general human-machine system. The EEG data from this experiment are available for public download at www.phypa.org. PMID:22156069

  20. Trust Management Model and Architecture for Context-Aware Service Platforms

    Microsoft Academic Search

    Ricardo Neisse; Maarten Wegdam; Marten Van Sinderen; Gabriele Lenzini

    2007-01-01

    The entities participating in a context-aware serv ice platform need to establish and manage trust relationships in order t o assert different trust aspects including identity provisioning, privacy enforcemen t, and context information provisioning. Current trust management models address these trust aspects individually when in fact they are dependent on eac h other. In this paper we identify and analyze

  1. A Knowledge-Based Approach to Retrieving Teaching Materials for Context-Aware Learning

    ERIC Educational Resources Information Center

    Shih, Wen-Chung; Tseng, Shian-Shyong

    2009-01-01

    With the rapid development of wireless communication and sensor technologies, ubiquitous learning has become a promising solution to educational problems. In context-aware ubiquitous learning environments, it is required that learning content is retrieved according to environmental contexts, such as learners' location. Also, a learning content…

  2. Semantic rules for context-aware geographical information retrieval

    Microsoft Academic Search

    Carsten Keßler; Martin Raubal; Christoph Wosniok

    2009-01-01

    Geographical information retrieval (GIR) can benefit from context information to adapt the results to a user’s current situation\\u000a and personal preferences. In this respect, semantics-based GIR is especially challenging because context information – such as collected from sensors – is often provided through numeric\\u000a values, which need to be mapped to ontological representations based on nominal symbols. The Web Ontology

  3. Flexible Macroblock Ordering for Context-Aware Ultrasound Video Transmission over Mobile WiMAX

    PubMed Central

    Martini, Maria G.; Hewage, Chaminda T. E. R.

    2010-01-01

    The most recent network technologies are enabling a variety of new applications, thanks to the provision of increased bandwidth and better management of Quality of Service. Nevertheless, telemedical services involving multimedia data are still lagging behind, due to the concern of the end users, that is, clinicians and also patients, about the low quality provided. Indeed, emerging network technologies should be appropriately exploited by designing the transmission strategy focusing on quality provision for end users. Stemming from this principle, we propose here a context-aware transmission strategy for medical video transmission over WiMAX systems. Context, in terms of regions of interest (ROI) in a specific session, is taken into account for the identification of multiple regions of interest, and compression/transmission strategies are tailored to such context information. We present a methodology based on H.264 medical video compression and Flexible Macroblock Ordering (FMO) for ROI identification. Two different unequal error protection methodologies, providing higher protection to the most diagnostically relevant data, are presented. PMID:20827292

  4. Ask Not for Whom the Cell Phone Tolls: Some Problems with the Notion of Context-Aware Computing

    Microsoft Academic Search

    Thomas Erickson

    2001-01-01

    aware systemsdetect a very small set of cues, typically quantitative variations of the few dimensions for which theyhave sensors. A (hypothetical) context-aware cell phone might be able to detect that it is motionless andin a dark place with high ambient noise but that is very different from the human awareness of beingin a theatre.If the context-awareness of systems is so

  5. A Generic Context Information System for Intelligent Vision Applications

    Microsoft Academic Search

    Luo Sun; Peng Dai; Linmi Tao; Guangyou Xu

    2008-01-01

    The future intelligent vision is expected to be highly context-aware such that it can perceive and be aware of user’s situation\\u000a and react accordingly. In this paper, we propose a context representation mechanism and build a high-performance, extensible,\\u000a distributed context information system based on it, in order to facilitate context-awareness development and information sharing.\\u000a It pays attention to representing and

  6. Balancing Awareness and Interruption in Mobile Patrol using Context-Aware Notification

    E-print Network

    McCrickard, Scott

    of Technology, the Netherlands ABSTRACT In mobile computing, a fundamental problem is maintaining awareness of the environment and of information presented as messages on a mobile device. In mobile police patrol, officers were validated in a follow-up study with twenty-four police officers. We found that full messages

  7. Context-Aware Intelligent Assistant Approach to Improving Pilot's Situational Awareness

    NASA Technical Reports Server (NTRS)

    Spirkovska, Lilly; Lodha, Suresh K.

    2004-01-01

    Faulty decision making due to inaccurate or incomplete awareness of the situation tends to be the prevailing cause of fatal general aviation accidents. Of these accidents, loss of weather situational awareness accounts for the largest number of fatalities. We describe a method for improving weather situational awareness through the support of a contextaware,domain and task knowledgeable, personalized and adaptive assistant. The assistant automatically monitors weather reports for the pilot's route of flight and warns her of detected anomalies. When and how warnings are issued is determined by phase of flight, the pilot s definition of acceptable weather conditions, and the pilot's preferences for automatic notification. In addition to automatic warnings, the pilot is able to verbally query for weather and airport information. By noting the requests she makes during the approach phase of flight, our system learns to provide the information without explicit requests on subsequent flights with similar conditions. We show that our weather assistant decreases the effort required to maintain situational awareness by more than 5.5 times when compared to the conventional method of in-flight weather briefings.

  8. Context-Awareness in Wearable and Ubiquitous Computing

    Microsoft Academic Search

    Gregory D. Abowd; Anind K. Dey; Robert Orr; Jason A. Brotherton

    1997-01-01

    A common focus shared by researchers in mobile, ubiquitous and wearable computing is the attempt to break away from the traditional desktop computing paradigm. Computational services need to become as mobile as their users and be extended to take advantage of the constantly changing context in which they are accessed. This paper will report on work done in the Future

  9. Context-aware privacy protection with profile management

    Microsoft Academic Search

    Anelia Mitseva; Mohamad Imine; Neeli R. Prasad

    2006-01-01

    Hotspot services will be offered in small, highly-populated public places like airports, hospitals, etc. They will play their assistive roles in the people's life only if they are secure, trusted, and nonobtrusive. Some of the challenges faced are the seamless operation between WLAN-based hotspots and other emerging wireless data networks technologies, for example body sensor networks; the exploitation of context-

  10. Context-aware Telephony: Privacy Preferences and Sharing Patterns

    E-print Network

    Connelly, Kay

    , 47401 connelly@indiana.edu ABSTRACT The proliferation of cell phones has led to an ever increasing in the number of cell phones has made them the most ubiquitous communication devices [27]. Consequently, cell cell phone interruptions that are mostly caused by the mismatch between the user's context and the cell

  11. A QoS-Aware Routing Protocol for Real-time Applications in Wireless Sensor Networks

    E-print Network

    Cherian, Mary

    2012-01-01

    The paper presents a quality of service aware routing protocol which provides low latency for high priority packets. Packets are differentiated based on their priority by applying queuing theory. Low priority packets are transferred through less energy paths. The sensor nodes interact with the pivot nodes which in turn communicate with the sink node. This protocol can be applied in monitoring context aware physical environments for critical applications.

  12. Gerhard Fischer 1 HCI Journal "Context-Aware Computing" Contribution to a Special Issue of Human-Computer Interaction Journal on "Context-

    E-print Network

    Fischer, Gerhard

    Gerhard Fischer 1 HCI Journal "Context-Aware Computing" Contribution to a Special Issue of Human-Computer Interaction Journal on "Context- Aware Computing" Articulating the Task at Hand and Making Information: it requires shared understanding between humans and their computational environments. This essay articulates

  13. Abstract--In open, heterogeneous, context-aware pervasive computing systems, suitable context models and reasoning

    E-print Network

    Loke, Seng W. - Loke, Seng W.

    developed with concepts from the state-space model, describing context and situations as geometrical, termed "Context Spaces", which describes context and situations using geometrical metaphors and concepts from the stat-space model [15]. Based on this model we present an approach to reason about situations

  14. A Wearable Context-Aware ECG Monitoring System Integrated with Built-in Kinematic Sensors of the Smartphone.

    PubMed

    Miao, Fen; Cheng, Yayu; He, Yi; He, Qingyun; Li, Ye

    2015-01-01

    Continuously monitoring the ECG signals over hours combined with activity status is very important for preventing cardiovascular diseases. A traditional ECG holter is often inconvenient to carry because it has many electrodes attached to the chest and because it is heavy. This work proposes a wearable, low power context-aware ECG monitoring system integrated built-in kinetic sensors of the smartphone with a self-designed ECG sensor. The wearable ECG sensor is comprised of a fully integrated analog front-end (AFE), a commercial micro control unit (MCU), a secure digital (SD) card, and a Bluetooth module. The whole sensor is very small with a size of only 58 × 50 × 10 mm for wearable monitoring application due to the AFE design, and the total power dissipation in a full round of ECG acquisition is only 12.5 mW. With the help of built-in kinetic sensors of the smartphone, the proposed system can compute and recognize user's physical activity, and thus provide context-aware information for the continuous ECG monitoring. The experimental results demonstrated the performance of proposed system in improving diagnosis accuracy for arrhythmias and identifying the most common abnormal ECG patterns in different activities. In conclusion, we provide a wearable, accurate and energy-efficient system for long-term and context-aware ECG monitoring without any extra cost on kinetic sensor design but with the help of the widespread smartphone. PMID:25996508

  15. A Wearable Context-Aware ECG Monitoring System Integrated with Built-in Kinematic Sensors of the Smartphone

    PubMed Central

    Miao, Fen; Cheng, Yayu; He, Yi; He, Qingyun; Li, Ye

    2015-01-01

    Continuously monitoring the ECG signals over hours combined with activity status is very important for preventing cardiovascular diseases. A traditional ECG holter is often inconvenient to carry because it has many electrodes attached to the chest and because it is heavy. This work proposes a wearable, low power context-aware ECG monitoring system integrated built-in kinetic sensors of the smartphone with a self-designed ECG sensor. The wearable ECG sensor is comprised of a fully integrated analog front-end (AFE), a commercial micro control unit (MCU), a secure digital (SD) card, and a Bluetooth module. The whole sensor is very small with a size of only 58 × 50 × 10 mm for wearable monitoring application due to the AFE design, and the total power dissipation in a full round of ECG acquisition is only 12.5 mW. With the help of built-in kinetic sensors of the smartphone, the proposed system can compute and recognize user’s physical activity, and thus provide context-aware information for the continuous ECG monitoring. The experimental results demonstrated the performance of proposed system in improving diagnosis accuracy for arrhythmias and identifying the most common abnormal ECG patterns in different activities. In conclusion, we provide a wearable, accurate and energy-efficient system for long-term and context-aware ECG monitoring without any extra cost on kinetic sensor design but with the help of the widespread smartphone. PMID:25996508

  16. Augmenting Traditional Books with Context-Aware Learning Supports from Online Learning Communities

    Microsoft Academic Search

    Gwo-dong Chen; Po-yao Chao

    2008-01-01

    ABSTRACT Recent advances,in ubiquitous computing,technologies have brought reality augmentation,of traditional objects to context-awareand social supports. Although a significantproportion of students prefer poring over traditional paper textbooks over electronic books, few studies have enhanced reading practice of traditional books with ubiquitous context-aware and collaborative learning supports that provide timely, contextual assistance. This study proposed,an innovative approach to develop a paper-based learning

  17. TaxiMedia: An Interactive Context-Aware Entertainment and Advertising System

    E-print Network

    TaxiMedia: An Interactive Context-Aware Entertainment and Advertising System Florian Alt1 , Alireza vehicles, such as trams, buses, and taxis as an advertising space is increasing since several years. However mainly the outside of the vehicles is used to show advertisements using paintings, foil or roof

  18. International Journal of Advanced Robotic Systems Heterogeneous Context-Aware Robots

    E-print Network

    Veloso, Manuela M.

    International Journal of Advanced Robotic Systems Heterogeneous Context-Aware Robots Providing Turck1 1 Department of Information Technology, Ghent University - IBBT, Ghent, Belgium 2 Robotics Group the original work is properly cited. Abstract Existing robot guides offer a tour of a building

  19. CybreMinder: A Context-Aware System for Supporting Reminders

    Microsoft Academic Search

    Anind K. Dey; Gregory D. Abowd

    2000-01-01

    Current tools do not provide adequate support to users for handling reminders. The main reason for this is the lack of use of rich context that speci- fies when a reminder should be presented to its recipient. We describe Cybre- Minder, a prototype c ontext-aware tool t hat supports users in sending and re- ceiving reminders that can b e

  20. The Family Intercom: Developing a Context-Aware Audio Communication System

    Microsoft Academic Search

    Kris Nagel; Cory D. Kidd; Thomas O’Connell; Anind K. Dey; Gregory D. Abowd

    2001-01-01

    We have begun an exploration of how ubiquitous computing tech- nology can facilitate different forms of audio communication within a family. We are interested in both intra- and inter-home communication. Though much technology exists to support this human-human communication, none of them make effective use of the context of the communication partners. In the Aware Home Research Initiative, we are

  1. A context-aware system in ubiquitous environment: a research guide assistant

    Microsoft Academic Search

    Seungsoo Lee; Kiwon Yeom; Sungju Kim; Seokho Lee

    2004-01-01

    The ubiquitous environment is to support people in their everyday life in an inconspicuous and unobtrusive way. This requires that information of the person and her preferences, liking, and habits are available in the ubiquitous system. In this paper, we propose the context aware system that can provide the tailored information service for user in ubiquitous computing environment. The system

  2. Context Aware Decision System in a Smart Home: Knowledge Representation and Decision

    E-print Network

    Paris-Sud XI, Université de

    Context Aware Decision System in a Smart Home: Knowledge Representation and Decision Making Using representation, Reasoning under uncertainty 1 Introduction As the development of Smart Homes (SH) has gained.chahuara,francois.portet,michel.vacher}imag.fr Abstract. This research addresses the issue of building home automa- tion systems reactive to voice

  3. Making Context Aware Decision from Uncertain Information in a Smart Home: a Markov Logic

    E-print Network

    Paris-Sud XI, Université de

    Making Context Aware Decision from Uncertain Information in a Smart Home: a Markov Logic Network. The approach has been experiemented in a real smart home with naive and users with special needs. Keywords 1 Introduction As the development of Smart Homes (SH) has gained a growing interest among many

  4. A WSN Routing Protocol Based on the Context-Aware Technology

    Microsoft Academic Search

    Zhe Wei; Zhikui Chen; Yang Liu; Zhuang Shao; Feng Xia; Guohai Jiang

    2010-01-01

    With the rapid progress of the whole computer technology, the wireless sensor networks gestated by the MEMS, wireless communication and low-consumption embedded technology construct the blueprint of the pervasive computing gradually for the people. This paper syncretizes the core thought of the context-aware technology and the WSN routing protocol with bringing forward the protocol CATRP adapting it through the research

  5. WiFi Authentication through Social Networks a Decentralized and Context-Aware Approach

    E-print Network

    Kuzmanov, Georgi

    authentication mechanism. In this paper, we progress the state-of-the-art by abandoning the centralized solutionWiFi Authentication through Social Networks ­ a Decentralized and Context-Aware Approach ­ Yunus for authentication and authorization of WiFi access points and other devices, exploiting the embedded trust relations

  6. The Effectiveness of a Meaningful Learning-Based Evaluation Model for Context-Aware Mobile Learning

    ERIC Educational Resources Information Center

    Huang, Yueh-Min; Chiu, Po-Sheng

    2015-01-01

    In recent years, context-aware mobile learning (CAML) has been widely applied to various fields and has become a popular issue in educational research. Despite the tremendous potential of CAML and its growing significance, continued evaluations and refinements under the advice of field experts and instructors are crucial to ensure its validity,…

  7. Augmenting Traditional Books with Context-Aware Learning Supports from Online Learning Communities

    ERIC Educational Resources Information Center

    Chen, Gwo-Dong; Chao, Po-Yao

    2008-01-01

    Recent advances in ubiquitous computing technologies have brought reality augmentation of traditional objects to context-aware and social supports. Although a significant proportion of students prefer poring over traditional paper textbooks over electronic books, few studies have enhanced reading practice of traditional books with ubiquitous…

  8. An Interactive Context-aware Power Management Technique for Optimizing Sensor Network Lifetime

    E-print Network

    Simunic, Tajana

    sensor data and system specifications (battery and solar panel specs, sensing and communication costsAn Interactive Context-aware Power Management Technique for Optimizing Sensor Network Lifetime problem in sensor networks equipped with renewable energy sources is deciding how do you allocate energy

  9. College Students' Conceptions of Context-Aware Ubiquitous Learning: A Phenomenographic Analysis

    ERIC Educational Resources Information Center

    Tsai, Pei-Shan; Tsai, Chin-Chung; Hwang, Gwo-Haur

    2011-01-01

    The purpose of this study was to explore students' conceptions of context-aware ubiquitous learning (u-learning). The students participated in a u-learning exercise using PDAs equipped with RFID readers. The data were collected from individual interviews with each of the students by a trained researcher, and the responses of the interviewees were…

  10. Experiences of developing and deploying a context-aware tourist guide: the GUIDE project

    Microsoft Academic Search

    Keith Cheverst; Nigel Davies; Keith Mitchell; Adrian Friday

    2000-01-01

    The GUIDE system has been developed to provide city visitors with a hand-held context-aware tourist guide. The system has been successfully deployed in a major tourist destination and is currently at the stage where it is publicly available to visitors who wish to explore the city. Reaching this stage has been the culmination of a number of distinct research efforts.

  11. Context-Aware Task Prompting: Sustaining of Supported Employment for People with Severe Mental Illness

    Microsoft Academic Search

    Yao-Jen Chang; Hsin Yu Hsu; Wan Chih Chang; Shu-Min Peng; Yan-Ru Chen; Tsen Yun Wang

    2009-01-01

    In collaboration with NGOs dedicated to supported employment programs, a novel context-aware task prompting system (CATPro) is presented in this research to increase work and life independence for cognitive-impaired patients such as people with traumatic brain injury, cerebral palsy, mental retardation, schizophrenia, dementia, and Alzheimer's disease. Preliminary results show the prototype is very reliable and accurate with 100% prompting success.

  12. A Longitudinal Study of English-Major Turkish Students' Pragmatic Awareness in an EFL Context

    ERIC Educational Resources Information Center

    Bulut, Dogan

    2008-01-01

    This paper presents the results of a longitudinal study which examined the development of the Turkish EFL learners' pragmatic awareness in an EFL context in a four-year period. The data which were originally collected from American native speakers and used by Bulut and Ozkan (2005) were also used in this study as the baseline to compare Turkish…

  13. Exploiting the icon arrangement on mobile devices as information source for context-awareness

    Microsoft Academic Search

    Matthias Böhmer; Gernot Bauer

    2010-01-01

    The contextual relevance of a service can only be determined by the human himself. However, a measure for relevance is required for context-aware service delivery. In this paper, we draw attention to icon arrangement on mobile devices as a new source of information for adaptive menus. We conducted contextual inquiries to investigate how people arrange icons on a grid-based menu.

  14. Context-Aware Service Composition and Component Change-over using Semantic Web Techniques

    Microsoft Academic Search

    Yoji Yamato; Hiroshi Sunaga

    2007-01-01

    This paper shows the effectiveness of dynamic over of service components for ubiquitous service composition. Although context-aware services are expected in the forthcoming ubiquitous computing era, conventional service coordination techniques are insufficient because of rigid interface designing. To cope with this problem, we have established a flexible service composition framework, where a semantic-level service scenario is translated and its components

  15. Matching with Externalities for Context-Aware User-Cell Association in Small Cell Networks

    E-print Network

    Paris-Sud XI, Université de

    Matching with Externalities for Context-Aware User-Cell Association in Small Cell Networks--In this paper, we propose a novel user-cell association approach for wireless small cell networks that exploits, tablet, laptop). This approach has the practical benefit of enabling the small cells to make better

  16. CAR: Context-aware Adaptive Routing for Delay Tolerant Mobile Networks

    E-print Network

    Mascolo, Cecilia

    1 CAR: Context-aware Adaptive Routing for Delay Tolerant Mobile Networks Mirco Musolesi, Member characterised by network partitions. As a consequence delay tolerant networking research has received communication systems and emergency operations networks. To answer this dichotomy, delay tolerant networking

  17. Context-Aware Publish-Subscribe: Model, Implementation, and Evaluation Gianpaolo Cugola, Alessandro Margara

    E-print Network

    Cugola, Gianpaolo

    Context-Aware Publish-Subscribe: Model, Implementation, and Evaluation Gianpaolo Cugola, Alessandro into account the situation in which the information to be com- municated is produced or consumed. Publish" of the publisher into the published messages. In this paper we claim that this approach is limiting and inefficient

  18. Context-Aware Design for Process Flexibility and Adaptation

    ERIC Educational Resources Information Center

    Yao, Wen

    2012-01-01

    Today's organizations face continuous and unprecedented changes in their business environment. Traditional process design tools tend to be inflexible and can only support rigidly defined processes (e.g., order processing in the supply chain). This considerably restricts their real-world applications value, especially in the dynamic and…

  19. Posture Monitoring System for Context Awareness in Mobile Computing

    Microsoft Academic Search

    Jonghun Baek; Byoung-Ju Yun

    2010-01-01

    The posture of a user is one of the contextual information that can be used for mobile applications and the treatment of idiopathic scoliosis. This paper describes a method for monitoring the posture of a user during operation of a mobile device in three activities such as sitting, standing, and walking. The user posture monitoring system (UPMS) proposed in this

  20. CARS: Context-Aware Rate Selection for vehicular networks

    Microsoft Academic Search

    Pravin Shankar; Tamer Nadeem; Justinian Rosca; Liviu Iftode

    2008-01-01

    Traffic querying, road sensing and mobile content delivery are emerging application domains for vehicular networks whose performance depends on the throughput these networks can sustain. Rate adaptation is one of the key mechanisms at the link layer that determine this performance. Rate adaptation in vehicular networks faces the following key challenges: (1) due to the rapid variations of the link

  1. iMuseumA: an agent-based context-aware intelligent museum system.

    PubMed

    Ayala, Inmaculada; Amor, Mercedes; Pinto, Mónica; Fuentes, Lidia; Gámez, Nadia

    2014-01-01

    Currently, museums provide their visitors with interactive tour guide applications that can be installed in mobile devices and provide timely tailor-made multimedia information about exhibits on display. In this paper, we argue that mobile devices not only could provide help to visitors, but also to museum staff. Our goal is to integrate, within the same system, multimedia tour guides with the management facilities required by museums. In this paper, we present iMuseumA (intelligent museum with agents), a mobile-based solution to customize visits and perform context-aware management tasks. iMuseumA follows an agent-based approach, which makes it possible to interact easily with the museum environment and make decisions based on its current status. This system is currently deployed in the Museum of Informatics at the Informatics School of the University of Málaga, and its main contributions are: (i) a mobile application that provides management facilities to museum staff by means of sensing and processing environmental data; (ii) providing an integrated solution for visitors, tour guides and museum staff that allows coordination and communication enrichment among different groups of users; (iii) using and benefiting from group communication for heterogeneous groups of users that can be created on demand. PMID:25390409

  2. Context-Aware Configuration: A Study on Improving Cell Phone Awareness

    Microsoft Academic Search

    Ashraf Khalil; Kay Connelly

    2005-01-01

    As the number of mobile devices we carry grows, the job of manag- ing those devices throughout the day becomes cumbersome. This is especially true for cell phones. Despite the many benefits they provide, cell phones create problems that arise from a mismatch between the user's context and the cell phone's behavior. In large part, the mismatch occurs because owners

  3. Peer Interaction and Social Network Analysis of Online Communities with the Support of Awareness of Different Contexts

    ERIC Educational Resources Information Center

    Lin, Jian-Wei; Mai, Li-Jung; Lai, Yung-Cheng

    2015-01-01

    Although several studies related to social-context awareness (SA) and knowledge-context awareness (KA) argued that each (SA or KA) can individually enhance peer interaction in an online learning community, other studies reached opposite conclusions. These conflicting findings likely stem from different experimental settings. Most importantly, few…

  4. Adaptive and context-aware scenarios for technology-enhanced learning system based on a didactical theory

    E-print Network

    Paris-Sud XI, Université de

    Adaptive and context-aware scenarios for technology- enhanced learning system based on a didactical-aware model of scenario based on a didactical theory and closely related to a domain model, a learner model, a context model. These models are acquired from: i) the know-how and real practices of teachers in a problem-based

  5. Context-aware brain-computer interfaces: exploring the information space of user, technical system and environment

    NASA Astrophysics Data System (ADS)

    Zander, T. O.; Jatzev, S.

    2012-02-01

    Brain-computer interface (BCI) systems are usually applied in highly controlled environments such as research laboratories or clinical setups. However, many BCI-based applications are implemented in more complex environments. For example, patients might want to use a BCI system at home, and users without disabilities could benefit from BCI systems in special working environments. In these contexts, it might be more difficult to reliably infer information about brain activity, because many intervening factors add up and disturb the BCI feature space. One solution for this problem would be adding context awareness to the system. We propose to augment the available information space with additional channels carrying information about the user state, the environment and the technical system. In particular, passive BCI systems seem to be capable of adding highly relevant context information—otherwise covert aspects of user state. In this paper, we present a theoretical framework based on general human-machine system research for adding context awareness to a BCI system. Building on that, we present results from a study on a passive BCI, which allows access to the covert aspect of user state related to the perceived loss of control. This study is a proof of concept and demonstrates that context awareness could beneficially be implemented in and combined with a BCI system or a general human-machine system. The EEG data from this experiment are available for public download at www.phypa.org. Parts of this work have already been presented in non-journal publications. This will be indicated specifically by appropriate references in the text.

  6. Let's Rendezvous: Application of Location-Aware Computing

    E-print Network

    Toronto, University of

    Let's Rendezvous: Application of Location-Aware Computing David Dearman EDGE Lab Faculty of Computer Science Dalhousie University, Canada dearman@cs.dal.ca POSITION STATEMENT Our current project will be available at the time of the `Applications of Location-Aware Computing' workshop. BIOGRAPHY David Dearman

  7. CASPER: context-aware scheme for paired-end reads from high-throughput amplicon sequencing

    PubMed Central

    2014-01-01

    Merging the forward and reverse reads from paired-end sequencing is a critical task that can significantly improve the performance of downstream tasks, such as genome assembly and mapping, by providing them with virtually elongated reads. However, due to the inherent limitations of most paired-end sequencers, the chance of observing erroneous bases grows rapidly as the end of a read is approached, which becomes a critical hurdle for accurately merging paired-end reads. Although there exist several sophisticated approaches to this problem, their performance in terms of quality of merging often remains unsatisfactory. To address this issue, here we present a context-aware scheme for paired-end reads (CASPER): a computational method to rapidly and robustly merge overlapping paired-end reads. Being particularly well suited to amplicon sequencing applications, CASPER is thoroughly tested with both simulated and real high-throughput amplicon sequencing data. According to our experimental results, CASPER significantly outperforms existing state-of-the art paired-end merging tools in terms of accuracy and robustness. CASPER also exploits the parallelism in the task of paired-end merging and effectively speeds up by multithreading. CASPER is freely available for academic use at http://best.snu.ac.kr/casper. PMID:25252785

  8. Supporting Context-Aware Collaboration in a Hospital: An Ethnographic Informed Design

    Microsoft Academic Search

    Miguel A. Muñoz; Víctor M. González; Marcela Rodríguez; Jesús Favela

    2003-01-01

    \\u000a This paper reports the development of a context-aware messaging system to support the intensive and distributed nature which\\u000a characterizes information management and collaboration in a hospital setting. Our design was based on a set of findings gathered\\u000a during a workplace study conducted in a hospital. We identified that collaboration in the hospital is highly based on a set\\u000a of contextual

  9. A Flexible Privacy and Trust Based Context-Aware Secure Framework

    Microsoft Academic Search

    Pierre E. Abi-Char; Abdallah Mhamed; Bachar El-Hassan; Mounir Mokhtari

    2010-01-01

    \\u000a Ubiquitous and pervasive technologies contribute significantly to the quality of life of dependent people by providing personalized\\u000a services in context aware environments. The deployment of these services within indoor and outdoor environments still require\\u000a security, privacy and trust issues for dependent persons. Considering the strong links between these three issues, our challenging\\u000a task was to integrate them in a common

  10. Investigating context-aware clues to assist navigation for visually impaired people

    Microsoft Academic Search

    Nicholas A. Bradley; Mark D. Dunlop

    2002-01-01

    It is estimated that 7.4 million people in Europe are visually impaired (1). Limitations of traditional mobility aids (i.e. white canes and guide dogs) coupled with a proliferation of context-aware technologies (e.g. Electronic Travel Aids, Global Positioning Systems and Geographical Information Systems), have stimulated research and development into navigational systems for the visually impaired. However, current research appears very technology

  11. Context-Aware Shared Control of a Robot Mobility Aid for the Elderly Blind

    Microsoft Academic Search

    Gerard Lacey; Shane Macnamara

    2000-01-01

    This paper describes the use of a Bayesian network to provide context-aware shared control of a robot mobility aid for the frail blind. The robot mobility aid, PAM-AID, is a “smart walker” that aims to assist the frail and elderly blind to walk safely indoors. The Bayesian network combines user input with high-level information derived from the sensors to provide

  12. Context-Aware Mobile Collaborative Systems: Conceptual Modeling and Case Study

    PubMed Central

    Benítez-Guerrero, Edgard; Mezura-Godoy, Carmen; Montané-Jiménez, Luis G.

    2012-01-01

    A Mobile Collaborative System (MCOS) enable the cooperation of the members of a team to achieve a common goal by using a combination of mobile and fixed technologies. MCOS can be enhanced if the context of the group of users is considered in the execution of activities. This paper proposes a novel model for Context-Aware Mobile COllaborative Systems (CAMCOS) and a functional architecture based on that model. In order to validate both the model and the architecture, a prototype system in the tourism domain was implemented and evaluated. PMID:23202007

  13. A Context-Aware Security Framework for Next Generation Mobile Networks

    NASA Astrophysics Data System (ADS)

    Bandinelli, Matteo; Paganelli, Federica; Vannuccini, Gianluca; Giuli, Dino

    The openness and heterogeneity of next generation communication networks are now highlighting more security issues than those of traditional communication environments. Moreover users’ security requirements can often change in mobile communication environments, depending on the situation in which the user is immersed. Our objective is to define a context-aware security framework for addressing the problems of end-to-end security on behalf of end-users. Based on context data acquisition and aggregation features, the framework uses contextual graphs to define security policies encompassing actions at different layers of communication systems’ architecture, while adapting to changing circumstances.

  14. The Role of Context-Aware Computing in Support of People with Dementia

    NASA Astrophysics Data System (ADS)

    Baumgarten, Matthias; Mulvenna, Maurice D.

    There is a strong motivation, in particular in the domain of healthcare, for new perspectives on context-driven research and computing in order to provide next-generation services to people that are tailored to individual needs rather than generalised assumptions that could potentially endanger human life. For that, context awareness is a key requirement in order to reach a better understanding of human-centric computing systems and environments, and subsequently, the deployment of dedicated services that are specifically adapted to the context to which they are applied. Such context-driven services would be able to provide the means of delivering situation-aware and person-centric services that ultimately may even anticipate future behaviour and problems of the user itself and the context in which the user finds themselves. However, the perpetual provision of contextual data in pervasive environments is far from being easy and includes major challenges that vary between environments. The reason for this is not only the sensor diversity within the environments themselves but also the contextual scope to be analysed and the amount of data to be collected and correlated to actually reach a minimum degree of contextual understanding. For that reason, in this chapter, contextual environments have been categorised as well as their interaction into different groups that reflect individual contextual levels of interest of which contextual understanding is required and consequently to which services can be applied.

  15. A Java Middleware Platform for Resource-Aware Distributed Applications

    E-print Network

    Paris-Sud XI, Université de

    A Java Middleware Platform for Resource-Aware Distributed Applications Frédéric Guidec, Yves Mahéo.Guidec|Yves.Maheo|Luc.Courtrai}@univ-ubs.fr Abstract This paper reports the development of D-RAJE (Dis- tributed Resource-Aware Java Environment), a Java-based middleware platform that makes it possible to model and to monitor resources

  16. Shared Situation Awareness For Army Applications

    Microsoft Academic Search

    William J. Farrell; Stephen Jameson; Craig Stoneking

    The real-time manned-unmanned teaming of on-the-move Army assets will provide mobile commanders and warfighters with improved situation awareness from the sharing and fusion of heterogeneous distributed data sources information. Lockheed Martin Advanced Technology Laboratories (ATL) is improving situation awareness through three ATL-developed technologies: adaptive, modular, multi- sensor information fusion; Grapevine agent-based intelligent data dissemination; and agent-based data discovery. These technologies

  17. Situational awareness and road prediction for trajectory control applications

    E-print Network

    Schön, Thomas

    , such as adaptive cruise control (ACC) or collision mitigation systems. Lat- eral control systems, such as laneSituational awareness and road prediction for trajectory control applications Christian Lundquist Introduction Most automotive original equipment manufacturers today offer longitudinal control systems

  18. Understanding and Using Context

    Microsoft Academic Search

    Anind K. Dey

    2001-01-01

    Context is a poorly used source of information in our computing environments. As a result, we have an impoverished understanding of what context is and how it can be used. In this paper, we provide an operational definition of context and discuss the different ways that context can be used by context-aware applications. We also present the Context Toolkit, an

  19. High Performance Computing Software Applications for Space Situational Awareness

    Microsoft Academic Search

    C. Giuliano; P. Schumacher; C. Matson; F. Chun; B. Duncan; K. Borelli; R. Desonia; G. Gusciora; K. Roe

    2006-01-01

    The High Performance Computing Software Applications Institute for Space Situational Awareness (HSAI-SSA) has completed its first full year of applications development. The emphasis of our work in this first year was in improving space surveillance sensor models and image enhancement software. These applications are the Space Surveillance Network Analysis Model (SSNAM), the Air Force Space Fence simulation (SimFence), and physically

  20. Design of an Unattended Monitoring System Using Context-Aware Technologies Based on 3 Screen

    NASA Astrophysics Data System (ADS)

    Kim, Seoksoo

    More recently, the importance of a multimedia-based monitoring system, keeps growing for the purpose of preventing crimes and, thus, various systems are being released. Nevertheless, most systems are lacking an independent feature of detection but simply saves a video or image. In order to overcome problems, therefore, this study has developed an unattended monitoring system based on a 3 Screen service environment by combining image tracking and analysis technologies, which can extract a human from images, with context-aware technologies using behavior patterns of people tracked and data of a surrounding environment, fully utilizing the wireless network infrastructure that has been increasingly available.

  1. Model-based formalization of medical knowledge for context-aware assistance in laparoscopic surgery

    NASA Astrophysics Data System (ADS)

    Kati?, Darko; Wekerle, Anna-Laura; Gärtner, Fabian; Kenngott, Hannes G.; Müller-Stich, Beat P.; Dillmann, Rüdiger; Speidel, Stefanie

    2014-03-01

    The increase of technological complexity in surgery has created a need for novel man-machine interaction techniques. Specifically, context-aware systems which automatically adapt themselves to the current circumstances in the OR have great potential in this regard. To create such systems, models of surgical procedures are vital, as they allow analyzing the current situation and assessing the context. For this purpose, we have developed a Surgical Process Model based on Description Logics. It incorporates general medical background knowledge as well as intraoperatively observed situational knowledge. The representation consists of three parts: the Background Knowledge Model, the Preoperative Process Model and the Integrated Intraoperative Process Model. All models depend on each other and create a concise view on the surgery. As a proof of concept, we applied the system to a specific intervention, the laparoscopic distal pancreatectomy.

  2. A Study of Context-Awareness RBAC Model Using User Profile on Ubiquitous Computing

    NASA Astrophysics Data System (ADS)

    Jang, Bokman; Park, Sungdo; Chang, Hyokyung; Ahn, Hyosik; Choi, Euiin

    Recently, With the IT technique growth, there is getting formed to convert to ubiquitous environment that means it can access information everywhere and every-time using various devices, and the computer can decide to provide useful services to users. But, in this computing environment will be connected to wireless network and various devices. According to, recklessness approaches of information resource make trouble to system. So, access authority management is very important issue both information resource and adapt to system through founding security policy to need a system. So, this model has a problem that is not concerned about user's context information as user's profile. In this paper suppose to context-awareness RABC model that based on profile about which user's information which provide efficiently access control to user through active classification, inference and judgment about user who access to system and resource.

  3. Activity Theory Approach to Developing Context-Aware Mobile Learning Systems for Understanding Scientific Phenomenon and Theories

    ERIC Educational Resources Information Center

    Uden, Lorna; Hwang, Gwo-Jen

    2013-01-01

    Mobile computing offers potential opportunities for students' learning especially when it combines a sensing device such as RFID (Radio Frequency Identification). Researchers have indicated that a key feature of in-field learning supported by mobile devices and technology is context awareness, with which context and functionality provided by…

  4. Context-Aware Resource Management in Multi-Inhabitant Smart Homes: A Nash H-Learning based Approach

    Microsoft Academic Search

    Nirmalya Roy; Abhishek Roy; Sajal K. Das

    2006-01-01

    A smart home aims at building intelligence automation with a goal to provide its inhabitants with maximum pos- sible comfort, minimize the resource consumption and thus overall cost of maintaining the home. 'Context Awareness' is perhaps the most salient feature of such an intelligent environment. Clearly, an inhabitant's mobility and activ- ities play a significant role in defining his contexts

  5. Adaptive and Context-Aware Reconciliation of Reactive and Pro-active Behavior in Evolving Systems

    NASA Astrophysics Data System (ADS)

    Trajcevski, Goce; Scheuermann, Peter

    One distinct characteristics of the context-aware systems is their ability to react and adapt to the evolution of the environment, which is often a result of changes in the values of various (possibly correlated) attributes. Based on these changes, reactive systems typically take corrective actions, e.g., adjusting parameters in order to maintain the desired specifications of the system's state. Pro-active systems, on the other hand, may change the mode of interaction with the environment as well as the desired goals of the system. In this paper we describe our (ECA)2 paradigm for reactive behavior with proactive impact and we present our ongoing work and vision for a system that is capable of context-aware adaptation, while ensuring the maintenance of a set of desired behavioral policies. Our main focus is on developing a formalism that provides tools for expressing normal, as well as defeasible and/or exceptional specification. However, at the same time, we insist on a sound semantics and the capability of answering hypothetical "what-if" queries. Towards this end, we introduce the high-level language L_{ EAR} that can be used to describe the dynamics of the problem domain, specify triggers under the (ECA)2 paradigm, and reason about the consequences of the possible evolutions.

  6. Keyword-based, context-aware selection of natural language query patterns

    Microsoft Academic Search

    Giorgio Orsi; Letizia Tanca; Eugenio Zimeo

    2011-01-01

    Pervasive access to distributed data sources by means of mobile devices is becoming a frequent realistic operational context in many application domains. In these scenarios data access may be thwarted by the scarce knowledge that users have of the application and of the underlying data schemas and complicated by limited query interfaces, due to the small size of the devices.

  7. An overlay network providing application-aware multimedia services

    Microsoft Academic Search

    Maarten Wijnants; Bart Cornelissen; Wim Lamotte; Bart De Vleeschauwer

    2006-01-01

    Real-time streaming of multimedia content is increasingly becoming a crucial part of networked applications. A logical consequence of this evolution is a growing demand for services that can be applied on these multimedia streams. In this paper, we present our overlay network which provides such multimedia services. Although these services are application-aware and can thus exploit application-specific knowledge, the overlay

  8. A Context-Aware Delayed Agglomeration Framework for Electron Microscopy Segmentation

    PubMed Central

    Parag, Toufiq; Chakraborty, Anirban; Plaza, Stephen; Scheffer, Louis

    2015-01-01

    Electron Microscopy (EM) image (or volume) segmentation has become significantly important in recent years as an instrument for connectomics. This paper proposes a novel agglomerative framework for EM segmentation. In particular, given an over-segmented image or volume, we propose a novel framework for accurately clustering regions of the same neuron. Unlike existing agglomerative methods, the proposed context-aware algorithm divides superpixels (over-segmented regions) of different biological entities into different subsets and agglomerates them separately. In addition, this paper describes a “delayed” scheme for agglomerative clustering that postpones some of the merge decisions, pertaining to newly formed bodies, in order to generate a more confident boundary prediction. We report significant improvements attained by the proposed approach in segmentation accuracy over existing standard methods on 2D and 3D datasets. PMID:26018659

  9. Preprint DRAFT Effective use of sleep states with context-aware selective resume

    E-print Network

    Goel, Ashvin

    . In this paper, we discuss the classes of applications that would benefit from selective re- sume, describe the user is actively engaging it in an interactive task, and asleep when the user is away. In this context partial consolidation of idle desktop VMs to save energy, as proposed in [9], requires the desk- top

  10. Building reliable mobile-aware applications using the Rover toolkit

    Microsoft Academic Search

    Anthony D. Joseph; M. Frans Kaashoek

    1996-01-01

    This paper discusses extensions to the Rover toolkit for construct- ing reliable mobile-aware applications. The extensions improve upon the existing failure model, which only addressed client or communication failures and guaranteed reliable message delivery from clients to server, but did not address server failures ( e.g., the loss of an incoming message by a failed server) (16). Due to the

  11. Aperiodic phased arrays for space situational awareness applications

    Microsoft Academic Search

    M. Montagna; G. Dauron; P. Besso; M. Bozzi; L. Perregrini

    2010-01-01

    This paper presents a study of the characteristics and the potentials of aperiodic arrays for application in the ground-based radar for Low Earth Orbit (LEO) space surveillance, in the frame of ESA's Space Situational Awareness (SSA) program. In aperiodic arrays, the unequally element spacing breaks the periodicity of the layout and of the radiation pattern. Their most interesting characteristics are

  12. A Battery-Aware Algorithm for Supporting Collaborative Applications

    E-print Network

    Rollins, Sami

    A Battery-Aware Algorithm for Supporting Collaborative Applications Sami Rollins and Cheryl Chang. Battery-powered devices such as laptops, cell phones, and MP3 players are becoming ubiquitous. There are several significant ways in which the ubiquity of battery-powered technology impacts the field

  13. Multicore Architecture-aware Scientific Applications

    SciTech Connect

    Srinivasa, Avinash

    2011-11-28

    Modern high performance systems are becoming increasingly complex and powerful due to advancements in processor and memory architecture. In order to keep up with this increasing complexity, applications have to be augmented with certain capabilities to fully exploit such systems. These may be at the application level, such as static or dynamic adaptations or at the system level, like having strategies in place to override some of the default operating system polices, the main objective being to improve computational performance of the application. The current work proposes two such capabilites with respect to multi-threaded scientific applications, in particular a large scale physics application computing ab-initio nuclear structure. The first involves using a middleware tool to invoke dynamic adaptations in the application, so as to be able to adjust to the changing computational resource availability at run-time. The second involves a strategy for effective placement of data in main memory, to optimize memory access latencies and bandwidth. These capabilties when included were found to have a significant impact on the application performance, resulting in average speedups of as much as two to four times.

  14. Power-aware dynamic placement of HPC applications

    Microsoft Academic Search

    Akshat Verma; Puneet Ahuja; Anindya Neogi

    2008-01-01

    High Performance Computing applications and platforms have been typically designed without regard to power consump- tion. With increased awareness of energy cost, power man- agement is now an issue even for compute-intensive server clusters. In this work, we investigate the use of power manage- ment techniques for high performance applications on mod- ern power-e!cient servers with virtualization support. We consider

  15. A presence-based context-aware chronic stress recognition system.

    PubMed

    Peternel, Klemen; Poga?nik, Matevž; Tav?ar, Rudi; Kos, Andrej

    2012-01-01

    Stressors encountered in daily life may play an important role in personal well-being. Chronic stress can have a serious long-term impact on our physical as well as our psychological health, due to ongoing increased levels of the chemicals released in the ‘fight or flight’ response. The currently available stress assessment methods are usually not suitable for daily chronic stress measurement. The paper presents a context-aware chronic stress recognition system that addresses this problem. The proposed system obtains contextual data from various mobile sensors and other external sources in order to calculate the impact of ongoing stress. By identifying and visualizing ongoing stress situations of an individual user, he/she is able to modify his/her behavior in order to successfully avoid them. Clinical evaluation of the proposed methodology has been made in parallel by using electrodermal activity sensor. To the best of our knowledge, the system presented herein is the first one that enables recognition of chronic stress situations on the basis of user context. PMID:23202238

  16. Review of Self-Awareness and Its Clinical Application in Stroke Rehabilitation

    ERIC Educational Resources Information Center

    Leung, Daniel P. K.; Liu, Karen P. Y.

    2011-01-01

    The objectives of this study were (i) to explore, following a literature review, the concepts of self-awareness, its assessment, and intervention for self-awareness deficits, as well as its clinical significance in stroke rehabilitation; and (ii) to apply the concepts of self-awareness in the context of a rehabilitation program. The search was…

  17. GEO-RBAC: a spatially aware RBAC

    Microsoft Academic Search

    Elisa Bertino; Barbara Catania; Maria Luisa Damiani; Paolo Perlasca

    2005-01-01

    Securing access to data in location-based services and mobile applications requires the definition of spatially aware access control systems. Even if some approaches have already been proposed either in the context of geographic database systems or context-aware applications, a comprehensive framework, general and flexible enough to cope with spatial aspects in real mobile applications, is still missing. In this paper,

  18. Representing Context in an Agent Architecture for Context-Based Decision Making

    Microsoft Academic Search

    Oana Bucur; Philippe Beaune; Olivier Boissier

    2005-01-01

    Ambient intelligence involves the convergence of several computing areas: ubiquitous computing, intelligent systems and context-awareness. Developing context-aware applications needs facilities for recognizing and representing context, reasoning on it and adapting to it accordingly. In what concerns context representation, the newest and most challenging representation is the ontological one. The problem is that current ontologies for context do not provide a

  19. Physical Posters as Gateways to Context-aware Services for Mobile Devices Enrico Rukzio, Albrecht Schmidt, Heinrich Hussmann

    E-print Network

    Physical Posters as Gateways to Context-aware Services for Mobile Devices Enrico Rukzio, Albrecht of physical posters as gateways to mobile services that are related to advertisements and information presented on these posters. In our approach the user can interact through a mobile device with services

  20. A CONTEXT AWARE FRAMEWORK FOR USER CENTERED British Telecommunications Plc, 1B-17, Plaza Sentral, Jalan Stesen

    E-print Network

    Bargiela, Andrzej

    A CONTEXT AWARE FRAMEWORK FOR USER CENTERED SERVICES SIMON HOH British Telecommunications Plc, 1B@utem.edu.my AND CHIN CHIN WONG British Telecommunications Plc, 1B-17, Plaza Sentral, Jalan Stesen Sentral 5, Kuala as an enabler for user centered services. Firstly, we will discuss about a sensory API mechanism developed

  1. Potentials of Enhanced Context Awareness in Wearable Assistants for Parkinson's Disease Patients with the Freezing of Gait Syndrome

    Microsoft Academic Search

    M. Bachlin; D. Roggen; G. Troster; M. Plotnik; N. Inbar; I. Meidan; T. Herman; M. Brozgol; E. Shaviv; N. Giladi; J. M. Hausdorff

    2009-01-01

    Freezing of gait (FOG) is a common gait deficit in advanced Parkinsonpsilas disease (PD). It is often a cause of falls, interferes with daily activities and significantly impairs quality of life. Gait deficits in PD patients are often resistant to pharmacologic treatment; therefore effective nonpharmacologic assistance is needed. In this paper we show the potential of context aware assistance for

  2. A Decision-Tree-Oriented Guidance Mechanism for Conducting Nature Science Observation Activities in a Context-Aware Ubiquitous Learning

    ERIC Educational Resources Information Center

    Hwang, Gwo-Jen; Chu, Hui-Chun; Shih, Ju-Ling; Huang, Shu-Hsien; Tsai, Chin-Chung

    2010-01-01

    A context-aware ubiquitous learning environment is an authentic learning environment with personalized digital supports. While showing the potential of applying such a learning environment, researchers have also indicated the challenges of providing adaptive and dynamic support to individual students. In this paper, a decision-tree-oriented…

  3. Using SWRL and OWL to Capture Domain Knowledge for a Situation Awareness Application Applied to a

    E-print Network

    Baclawski, Kenneth B.

    Using SWRL and OWL to Capture Domain Knowledge for a Situation Awareness Application Applied situation awareness applications we begin by con- structing an OWL ontology to capture a language our situation awareness application, SAWA, which can employ either Jess or BaseVISor as its inference

  4. Cache-aware optimization of BAN applications

    Microsoft Academic Search

    Lei Ju; Yun Liang; Samarjit Chakraborty; Tulika Mitra; Abhik Roychoudhury

    2009-01-01

    Body-area sensor network or BAN-based health monitoring is increasingly becoming a popular alternative to traditional wired\\u000a bio-monitoring techniques. However, most biomonitoring applications need continuous processing of large volumes of data, as\\u000a a result of which both power consumption and computation bandwidth turn out to be serious constraints for sensor network platforms.\\u000a This has resulted in a lot of recent interest

  5. CyberDesk: A Framework for Providing Self-integrating Context-aware Services

    Microsoft Academic Search

    Anind K. Dey; Gregory D. Abowd; Andrew Wood

    1998-01-01

    Applications are often designed to take advantage of the potential for integration with each other via shared information. Current approaches for integration are limited, effecting both the programmer and end-user. In this paper, we present CyberDesk, a framework for self-integrating software in which integration is driven by user context. It relieves the burden on programmers by removing the necessity to

  6. Adaptive Context aware and intelligent searching in mobile learning applications

    Microsoft Academic Search

    2010-01-01

    With the fast development of distributed network technology and speeding increase of cable and wireless network bandwidth, information can circulate in computer through various manners and various kinds of carriers for users to access. Therefore, it has now become one of the hottest issues as how network can be used to enrich the living quality of people. This paper will

  7. A Programming Interface for Application-Aware Adaptation in Mobile Computing

    E-print Network

    Satyanarayanan, Mahadev "Satya"

    adaptation[10]. Application-aware adaptation characterizes the de- sign space between two extremes. At oneA Programming Interface for Application-Aware Adaptation in Mobile Computing Brian D. Noble, Morgan at varying degrees of fidelity. In this pa- per we present applicaton-aware adaptation as a solution

  8. Mobile Phone Middleware Architecture for Energy and Context Awareness in Location-Based Services

    PubMed Central

    Galeana-Zapién, Hiram; Torres-Huitzil, César; Rubio-Loyola, Javier

    2014-01-01

    The disruptive innovation of smartphone technology has enabled the development of mobile sensing applications leveraged on specialized sensors embedded in the device. These novel mobile phone applications rely on advanced sensor information processes, which mainly involve raw data acquisition, feature extraction, data interpretation and transmission. However, the continuous accessing of sensing resources to acquire sensor data in smartphones is still very expensive in terms of energy, particularly due to the periodic use of power-intensive sensors, such as the Global Positioning System (GPS) receiver. The key underlying idea to design energy-efficient schemes is to control the duty cycle of the GPS receiver. However, adapting the sensing rate based on dynamic context changes through a flexible middleware has received little attention in the literature. In this paper, we propose a novel modular middleware architecture and runtime environment to directly interface with application programming interfaces (APIs) and embedded sensors in order to manage the duty cycle process based on energy and context aspects. The proposed solution has been implemented in the Android software stack. It allows continuous location tracking in a timely manner and in a transparent way to the user. It also enables the deployment of sensing policies to appropriately control the sampling rate based on both energy and perceived context. We validate the proposed solution taking into account a reference location-based service (LBS) architecture. A cloud-based storage service along with online mobility analysis tools have been used to store and access sensed data. Experimental measurements demonstrate the feasibility and efficiency of our middleware, in terms of energy and location resolution. PMID:25513821

  9. ERMHAN: A Context-Aware Service Platform to Support Continuous Care Networks for Home-Based Assistance.

    PubMed

    Paganelli, Federica; Spinicci, Emilio; Giuli, Dino

    2008-01-01

    Continuous care models for chronic diseases pose several technology-oriented challenges for home-based continuous care, where assistance services rely on a close collaboration among different stakeholders such as health operators, patient relatives, and social community members. Here we describe Emilia Romagna Mobile Health Assistance Network (ERMHAN) a multichannel context-aware service platform designed to support care networks in cooperating and sharing information with the goal of improving patient quality of life. In order to meet extensibility and flexibility requirements, this platform has been developed through ontology-based context-aware computing and a service oriented approach. We also provide some preliminary results of performance analysis and user survey activity. PMID:18695739

  10. Collaborative knowledge acquisition for the design of context-aware alert systems

    PubMed Central

    Joffe, Erel; Havakuk, Ofer; Herskovic, Jorge R; Patel, Vimla L

    2012-01-01

    Objective To present a framework for combining implicit knowledge acquisition from multiple experts with machine learning and to evaluate this framework in the context of anemia alerts. Materials and Methods Five internal medicine residents reviewed 18 anemia alerts, while ‘talking aloud’. They identified features that were reviewed by two or more physicians to determine appropriate alert level, etiology and treatment recommendation. Based on these features, data were extracted from 100 randomly-selected anemia cases for a training set and an additional 82 cases for a test set. Two staff internists assigned an alert level, etiology and treatment recommendation before and after reviewing the entire electronic medical record. The training set of 118 cases (100 plus 18) and the test set of 82 cases were explored using RIDOR and JRip algorithms. Results The feature set was sufficient to assess 93% of anemia cases (intraclass correlation for alert level before and after review of the records by internists 1 and 2 were 0.92 and 0.95, respectively). High-precision classifiers were constructed to identify low-level alerts (precision p=0.87, recall R=0.4), iron deficiency (p=1.0, R=0.73), and anemia associated with kidney disease (p=0.87, R=0.77). Discussion It was possible to identify low-level alerts and several conditions commonly associated with chronic anemia. This approach may reduce the number of clinically unimportant alerts. The study was limited to anemia alerts. Furthermore, clinicians were aware of the study hypotheses potentially biasing their evaluation. Conclusion Implicit knowledge acquisition, collaborative filtering and machine learning were combined automatically to induce clinically meaningful and precise decision rules. PMID:22744961

  11. Context management platform for tourism applications.

    PubMed

    Buján, David; Martín, David; Torices, Ortzi; López-de-Ipiña, Diego; Lamsfus, Carlos; Abaitua, Joseba; Alzua-Sorzabal, Aurkene

    2013-01-01

    The notion of context has been widely studied and there are several authors that have proposed different definitions of context. However, context has not been widely studied in the framework of human mobility and the notion of context has been imported directly from other computing fields without specifically addressing the tourism domain requirements. In order to store and manage context information a context data model and a context management platform are needed. Ontologies have been widely used in context modelling, but many of them are designed to be applied in general ubiquitous computing environments, do not contain specific concepts related to the tourism domain or some approaches do not contain enough concepts to represent context information related to the visitor on the move. That is why we propose a new approach to provide a better solution to model context data in tourism environments, adding more value to our solution reusing data about tourist resources from an Open Data repository and publishing it as Linked Data. We also propose the architecture for a context information management platform based on this context data model. PMID:23797739

  12. Semantic-driven context-aware visual information indexing and retrieval: Applied in the film post-production domain

    Microsoft Academic Search

    Atta Badii; Meng Zhu; Chattun Lallah; Michael Crouch

    2009-01-01

    A large volume of visual content is inaccessible until effective and efficient indexing and retrieval of such data is achieved. In this paper, we introduce the dream system, which is a knowledge-assisted semantic-driven context-aware visual information retrieval system applied in the film post production domain. We mainly focus on the automatic labelling and topic map related aspects of the framework.

  13. Choreo: Network-Aware Task Placement for Cloud Applications

    E-print Network

    Gummadi, Ramakrishna

    for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted their data transfer characteristics, it is possible to improve the performance of a mix of applications. A concrete context for our work is a tenant (an organization paying for compu

  14. Issues of representing context illustrated by video-surveillance applications

    Microsoft Academic Search

    François Brémond; Monique Thonnat

    1998-01-01

    This paper tackles several issues of context representation in knowledge-based systems. First, we propose a definition of context through the description of the different types of information manipulated by a process. Thanks to this definition we explain the role of the granularity level of processing and the role of the abstraction level of application in modelling context. Based on this

  15. DRAFT : GEORGE S., LEKIRA R. A., MECOCO: A CONTEXT-AWARE SYSTEM FOR MEDIATED COMMUNICATIONS , INTERNATIONAL JOURNAL OF INTERACTIVE MOBILE TECHNOLOGIES (IJIM), VOL. 3, N3, 2009

    E-print Network

    Paris-Sud XI, Université de

    Contextual Communications) with a specific interface promoting the search of interesting contactsDRAFT : GEORGE S., LEKIRA R. A., MECOCO: A CONTEXT-AWARE SYSTEM FOR MEDIATED COMMUNICATIONS-Aware System for Mediated Communications doi:10.3991/ijxx.vxix.xxx (Please do not delete this line) S. George

  16. CANoE: A Context-Aware Notification Model to Support the Care of Older Adults in a Nursing Home

    PubMed Central

    Nava-Muñoz, Sandra; Morán, Alberto L.

    2012-01-01

    Taking care of elders in a nursing home is not an easy task. Caregivers face two major problems: a lack of awareness of the situations surrounding the elderly care and the lack of information regarding the availability and the activities of other caregivers to support their coordination process. Various efforts have proposed solutions to cope with these problems, but they do it without considering all the requirements imposed by the criticality of this type of environment. In this paper we propose CANoE, a model for the design of context-aware notifications in critical environments, such as a nursing home. The main feature of this model is that it considers three sources of context (the environment, and the issuer and the receiver of the notification) for adapting the content, the terms of delivery and the presentation of the notification message. Based on the CANoE model we developed the CANoE-Aw and CU-IDA systems, which were evaluated through two case studies in a nursing home. The results of these evaluations provide evidence that caregivers achieved an increased awareness of the situations of care of the elderly and perceived the systems as adequate tools to support their coordination while attending a situation of care. PMID:23112666

  17. The context toolkit: aiding the development of context-enabled applications

    Microsoft Academic Search

    Daniel Salber; Anind K. Dey; Gregory D. Abowd

    1999-01-01

    Context-enabled applications are just emerging and promisericher interaction by taking environmental context into account.However, they are difficult to build due to their distributednature and the use of unconventional sensors. The concepts oftoolkits and widget libraries in graphical user interfaces has beentremendously successtil, allowing programmers to leverage offexisting building blocks to build interactive systems more easily.We introduce the concept of context

  18. A Context-Aware Statistical Ontology Approach for Adaptive Face Recognition

    Microsoft Academic Search

    Sung Kwan Kang; Pankaj Raj Dawadi; Phill-kyu Rhee

    2007-01-01

    This paper proposes a statistical ontology approach for adaptive face recognition in a situation variant environment. In this paper, we have introduced a new concept statistical ontology for context sensitivity, as we found many developed systems work on context invariant environment. Due to the effects of illumination makes a supreme obstinate designing context sensitive recognition system; we have given more

  19. A Mobile Context-Aware Framework for Managing Learning Schedules--Data Analysis from a Diary Study

    ERIC Educational Resources Information Center

    Yau, Jane Y.-K.; Joy, Mike; Dickert, Stephan

    2010-01-01

    We report the results of a diary study to determine whether a diary approach could be used as a successful way of retrieving a) the user's learning contexts, b) which learning contexts are significant for consideration within an m-learning application, and c) which learning materials are appropriate for which learning situation. Analyses of data…

  20. A Battery-Aware Algorithm for Supporting Collaborative Applications

    NASA Astrophysics Data System (ADS)

    Rollins, Sami; Chang-Yit, Cheryl

    Battery-powered devices such as laptops, cell phones, and MP3 players are becoming ubiquitous. There are several significant ways in which the ubiquity of battery-powered technology impacts the field of collaborative computing. First, applications such as collaborative data gathering, become possible. Also, existing applications that depend on collaborating devices to maintain the system infrastructure must be reconsidered. Fundamentally, the problem lies in the fact that collaborative applications often require end-user computing devices to perform tasks that happen in the background and are not directly advantageous to the user. In this work, we seek to better understand how laptop users use the batteries attached to their devices and analyze a battery-aware alternative to Gnutella’s ultrapeer selection algorithm. Our algorithm provides insight into how system maintenance tasks can be allocated to battery-powered nodes. The most significant result of our study indicates that a large portion of laptop users can participate in system maintenance without sacrificing any of their battery. These results show great promise for existing collaborative applications as well as new applications, such as collaborative data gathering, that rely upon battery-powered devices.

  1. Learning context-aware sparse representation for single image super-resolution

    Microsoft Academic Search

    Min-Chun Yang; Chang-Heng Wang; Ting-Yao Hu; Yu-Chiang Frank Wang

    2011-01-01

    This paper presents a novel learning-based method for single image super-resolution (SR). Given an input low-resolution image and its image pyramid, we propose to perform context-constrained image segmentation and construct an image segment dataset with different context categories. By learning context-specific image sparse representation, our method aims to model the relationship between the interpolated image patches and their ground truth

  2. A Novel Approach for Creating Activity-Aware Applications in a Hospital Environment

    NASA Astrophysics Data System (ADS)

    Bardram, Jakob E.

    Context-aware and activity-aware computing has been proposed as a way to adapt the computer to the user’s ongoing activity. However, deductively moving from physical context - like location - to establishing human activity has proved difficult. This paper proposes a novel approach to activity-aware computing. Instead of inferring activities, this approach enables the user to explicitly model their activity, and then use sensor-based events to create, manage, and use these computational activities adjusted to a specific context. This approach was crafted through a user-centered design process in collaboration with a hospital department. We propose three strategies for activity-awareness: context-based activity matching, context-based activity creation, and context-based activity adaptation. We present the implementation of these strategies and present an experimental evaluation of them. The experiments demonstrate that rather than considering context as information, context can be a relational property that links ’real-world activities’ with their ’computational activities’.

  3. Q-CAD: QoS and Context Aware Discovery Framework for Mobile Systems Licia Capra, Stefanos Zachariadis and Cecilia Mascolo

    E-print Network

    Mascolo, Cecilia

    Q-CAD: QoS and Context Aware Discovery Framework for Mobile Systems Licia Capra, Stefanos 6BT, UK {L.Capra|S.Zachariadis|C.Mascolo}@cs.ucl.ac.uk Abstract This paper presents Q-CAD/her quality- of-service (QoS) needs are actually selected. In this paper we present Q-CAD, a context and Qo

  4. Modelling Context-Aware Security for Electronic Health Records Using Contextual Graphs

    Microsoft Academic Search

    Pravin Shetty; Seng Loke

    The paper presents an approach to modelling security for electronic health records by using Contextual Graphs. Such graphs provide the context in which security policies should be used, i.e. such graphs function as meta-policies. We argue that such an approach has the advantages of modularity and ease of understanding, and supports fine-grained security determined by contexts such as location, proximity

  5. GEO-RBAC: A spatially aware RBAC

    Microsoft Academic Search

    Maria Luisa Damiani; Elisa Bertino; Barbara Catania; Paolo Perlasca

    2007-01-01

    Securing access to data in location-based services and mobile applications requires the definition of spatially aware access-control systems. Even if some approaches have already been proposed either in the context of geographic database systems or context-aware applications, a comprehensive framework, general and flexible enough to deal with spatial aspects in real mobile applications, is still missing. In this paper, we

  6. A context-aware-based audio guidance system for blind people using a multimodal profile model.

    PubMed

    Lin, Qing; Han, Youngjoon

    2014-01-01

    A wearable guidance system is designed to provide context-dependent guidance messages to blind people while they traverse local pathways. The system is composed of three parts: moving scene analysis, walking context estimation and audio message delivery. The combination of a downward-pointing laser scanner and a camera is used to solve the challenging problem of moving scene analysis. By integrating laser data profiles and image edge profiles, a multimodal profile model is constructed to estimate jointly the ground plane, object locations and object types, by using a Bayesian network. The outputs of the moving scene analysis are further employed to estimate the walking context, which is defined as a fuzzy safety level that is inferred through a fuzzy logic model. Depending on the estimated walking context, the audio messages that best suit the current context are delivered to the user in a flexible manner. The proposed system is tested under various local pathway scenes, and the results confirm its efficiency in assisting blind people to attain autonomous mobility. PMID:25302812

  7. A Context-Aware-Based Audio Guidance System for Blind People Using a Multimodal Profile Model

    PubMed Central

    Lin, Qing; Han, Youngjoon

    2014-01-01

    A wearable guidance system is designed to provide context-dependent guidance messages to blind people while they traverse local pathways. The system is composed of three parts: moving scene analysis, walking context estimation and audio message delivery. The combination of a downward-pointing laser scanner and a camera is used to solve the challenging problem of moving scene analysis. By integrating laser data profiles and image edge profiles, a multimodal profile model is constructed to estimate jointly the ground plane, object locations and object types, by using a Bayesian network. The outputs of the moving scene analysis are further employed to estimate the walking context, which is defined as a fuzzy safety level that is inferred through a fuzzy logic model. Depending on the estimated walking context, the audio messages that best suit the current context are delivered to the user in a flexible manner. The proposed system is tested under various local pathway scenes, and the results confirm its efficiency in assisting blind people to attain autonomous mobility. PMID:25302812

  8. Defining and Modeling Context in a Multi-Agent Systems Architecture for Decision-Making

    Microsoft Academic Search

    Oana Bucur; Philippe Beaune; Olivier Boissier

    Ambient intelligence involves the convergence of several computing areas: ubiquitous computing, intelligent systems and context-awareness. Developing context-aware applications needs facilities for recognizing and representing context, reasoning on it and adapting to it accordingly. In what concerns context representation, the newest and most challenging representation is the ontological one. The problem is that current ontologies for context do not provide a

  9. Using Context-Aware Computing to Reduce the Perceived Burden of Interruptions from Mobile Devices

    E-print Network

    was developed that auto- matically detects postural and ambulatory activity transitions in real time using delivered at activity transitions relative to those deliv- ered at random times. Messages delivered at activity transi- tions were found to be better received, thereby suggesting a viable strategy for context

  10. Context Aware Ubiquitous Learning Environments for Peer-to-Peer Collaborative Learning

    Microsoft Academic Search

    Stephen J. H. Yang

    2006-01-01

    A ubiquitous learning environment provides an interoperable, pervasive, and seamless learning architecture to connect, integrate, and share three major dimensions of learning resources: learning collaborators, learning contents, and learning services. Ubiquitous learning is characterized by providing intuitive ways for identifying right learning collaborators, right learning contents and right learning services in the right place at the right time. Our context

  11. Proactive medication assistances based on spatiotemporal context awareness of aged persons

    Microsoft Academic Search

    Jae-Hun Choi; Myung-Eun Lim; Dae-Hee Kim; Soo-Jun Park

    2008-01-01

    In this paper, we developed a system that could assist appropriate activities for medication adherence of the elderly. It employs a proactive knowledge which is represented as templates predefined for their medication activities. The knowledge-based assistance depends on the contexts considerably, which the system can recognize by continuously monitoring the current position and the time-schedule for their medications. The monitoring

  12. Language Learning Experience in School Context and Metacognitive Awareness of Multilingual Children

    ERIC Educational Resources Information Center

    Le Pichon Vorstman, Emmanuelle; De Swart, Henriette; Ceginskas, Viktorija; Van Den Bergh, Huub

    2009-01-01

    What is the influence of a language learning experience (LLE) in a school context on the metacognitive development of children? To answer that question, we presented 54 multilingual preschoolers with two movie clips and examined their reactions to an exolingual situation of communication. These preschoolers were aged four and a half to six and a…

  13. TSV Stress Aware Timing Analysis with Applications to 3D-IC Layout Optimization

    E-print Network

    Lim, Sung Kyu

    TSV Stress Aware Timing Analysis with Applications to 3D-IC Layout Optimization Jae-Seok Yang, Krit TSV fill material is copper which causes tensile stress on sil- icon near TSV. In this paper, we propose systematic TSV stress aware timing analysis and show how to optimize lay- out for better

  14. Engineering Mobile Agent Applications via Context-Dependent Coordination

    Microsoft Academic Search

    Giacomo Cabri; Letizia Leonardi; Franco Zambonelli

    2002-01-01

    The design and development of Internet applications requiring dynamic and possibly mobile access to Internet resources can take advantage of an approach based on autonomous mobile agents. However, mobility introduces peculiar issues related to the modeling and management of the agents' coordination activities. This paper introduces context-dependent coordination as a framework for the design and development of Internet applications based

  15. A Unifying Perspective on Context-Aware Evaluation and Management of Heterogeneous Wireless Connectivity

    Microsoft Academic Search

    Paolo Bellavista; Antonio Corradi; Carlo Giannelli

    2011-01-01

    The growing market of wireless devices with multi- ple connectivity technologies, e.g., Wi-Fi, Bluetooth, and UMTS, is pushing toward the necessity of seamless autonomic selection of the proper connectivity network at any time. That selection should be context-dependent and consider several elements, at different abstraction layers, from bandwidth requirements to network congestion, from connectivity costs to user preferences. As a

  16. CAPEUS: An Architecture for Context-Aware Selection and Execution of Services

    Microsoft Academic Search

    Michael Samulowitz; Florian Michahelles; Claudia Linnhoff-popien

    2001-01-01

    This paper introduces a comprehensive framework that allows mobile users to access a variety of services provided by their\\u000a current environment (e.g. print services). Novel to our approach is that selection and execution of services takes into account\\u000a the user’s current context. Instead of being harassed by useless activities as service browsing or configuration issues, environmental\\u000a services get seamlessly aligned

  17. Full RDO-Support Power-Aware CABAC Encoder With Efficient Context Access

    Microsoft Academic Search

    Xiaohua Tian; Thinh M. Le; Xi Jiang; Yong Lian

    2009-01-01

    In this paper, we propose a full-hardware context-based adaptive binary arithmetic coder (CABAC) encoder, which is the entropy coding tool adopted in the main and higher profiles of the video coding standard H.264\\/AVC. All CABAC coding features are implemented in hardware (HW), and different coding modes including rate-distortion optimization (RDO) are fully supported. An efficient memory access scheme is also

  18. Situational awareness and its application in the delivery suite.

    PubMed

    Edozien, Leroy C

    2015-01-01

    The delivery suite is a high-risk environment. Transitions between low-risk and high-risk can be swift, and sentinel events can occur without warning. The prevention of accidents in this environment rests on the vigilance of the individual practitioner at the frontline. It is, therefore, important that the individual practitioner should develop and maintain the cognitive skills to anticipate, recognize, and intercept unfolding error chains. This commentary gives an overview of a nontechnical skill that is essential for safe practice in a delivery suite: situational awareness. A basic description of situational awareness is provided, using examples of loss of situational awareness in the delivery suite and examples of simple interventions that could promote situational awareness. Involuntary automaticity readily creeps in during performance of routine tasks, and cognitive overload could deplete attentional resources that are, by nature, limited. Strategies and tactics for maintaining situational awareness include proactively seeking and managing information on unfolding events, continually updating individual and team mental models, mindful use of checklists and scoreboards, and avoidance of attentional blindness. These simple interventions require minimal financial resources but could immensely enhance clinical performance and patient safety. Situational awareness should be included in the training of obstetrician-gynecologists and other staff working in a delivery suite. PMID:25560106

  19. Social Email: A Framework and Application for More Socially-Aware Communications

    NASA Astrophysics Data System (ADS)

    Tran, Thomas; Rowe, Jeff; Wu, S. Felix

    As online social networks (OSN) attempt to mimic real life social networks, we have made progress towards using OSNs to provide us with data to allow for richer and more robust online communications. In this paper, we present a novel approach towards socially-aware email. Currently, email provides too little control to the recipient. Our approach, dubbed SoEmail, provides social context to messages using an OSN's underlying social graph. This not only gives the recipient control over who can message her, but it also provides her with an understanding of where the message originated from, socially. Furthermore, users who do not wish to use the built-in social aspect of SoEmail, can send and receive emails without any changes to their behavior. The modifications we made to the email application to provide this social context are not invasive and can be easily ignored by any existing email client. We built SoEmail on top of an existing framework, known as Davis Social Links, which allows SoEmail to be completely agnostic about the underlying OSN. We created a web-based, standards-based web client for SoEmail using Facebook and Gmail as the underlying systems which has been released for public use and has had a good adoption rate.

  20. Knowledge representations in ambient assisted living--context awareness in smart homes.

    PubMed

    Zilm, Franz-Albert; Scharnweber, Corinna; Haux, Reinhold

    2014-01-01

    This paper introduces a knowledge representation for smart home rules and scenarios. We have created a rule base based on the rules found during a literature review. Following this, a general rule concept was derived from the identified categories. Furthermore, subcategories for certain contexts in the smart home environment were identified and illustrated in the results by means of an extract of the rules found in the literature. Based on this information, a hierarchically structured nomenclature with four axes has been developed and evaluated. PMID:25160196

  1. Context-Aware Sensor Data Dissemination for Mobile Users in Remote Areas

    E-print Network

    Ngai, Edith Cheuk-Han

    recently, which leverage mobile phones as sensors to collect and report the ambient data for monitoring or no cellular and WiFi connectivities. Different from existing participatory and urban sensing applications

  2. Semantic Web Technologies for the Integration of Learning Tools and Context-Aware Educational Services

    NASA Astrophysics Data System (ADS)

    Jeremi?, Zoran; Jovanovi?, Jelena; Gaševi?, Dragan

    One of the main software engineers' competencies, solving software problems, is most effectively acquired through an active examination of learning resources and work on real-world examples in small development teams. This obviously indicates a need for an integration of several existing learning tools and systems in a common collaborative learning environment, as well as advanced educational services that provide students with right in time advice about learning resources and possible collaboration partners. In this paper, we present how we developed and applied a common ontological foundation for the integration of different existing learning tools and systems in a common learning environment called DEPTHS (Design Patterns Teaching Help System). In addition, we present a set of educational services that leverages semantic rich representation of learning resources and students' interaction data to recommend resource relevant for students' current learning context.

  3. Cloud computing for context-aware enhanced m-Health services.

    PubMed

    Fernandez-Llatas, Carlos; Pileggi, Salvatore F; Ibañez, Gema; Valero, Zoe; Sala, Pilar

    2015-01-01

    m-Health services are increasing its presence in our lives due to the high penetration of new smartphone devices. This new scenario proposes new challenges in terms of information accessibility that require new paradigms which enable the new applications to access the data in a continuous and ubiquitous way, ensuring the privacy required depending on the kind of data accessed. This paper proposes an architecture based on cloud computing paradigms in order to empower new m-Health applications to enrich their results by providing secure access to user data. PMID:25417085

  4. A context-aware tool-set for routing-targeted mutual configuration and optimization of LLNs through bridging virtual and physical worlds

    E-print Network

    the routing issues of Wireless Sensor Networks (WSNs). Although this domain has been continued to researchA context-aware tool-set for routing-targeted mutual configuration and optimization of LLNs through-mean.hou@isima.fr 4 peng.zhou@isima.fr Abstract--In the history of the WSN, unexpected routing behaviors is always

  5. Design and development of an intelligent context-aware decision support system for real-time monitoring of container terminal operations

    Microsoft Academic Search

    E. W. T. Ngai; Chung-Lun Li; T. C. E. Cheng; Y. H. Venus Lun; Kee-Hung Lai; Jiannong Cao; M. C. M. Lee

    2011-01-01

    This paper describes a case study of the research and development of an intelligent context-aware decision support system (ICADSS) prototype for real-time monitoring of container terminal operations in Hong Kong. We present the system design and development of the prototype system, and discuss the experiences and lessons learned. To the best of our knowledge, this study is the first identifiable

  6. A Context-Aware Mobile Learning System for Supporting Cognitive Apprenticeships in Nursing Skills Training

    ERIC Educational Resources Information Center

    Wu, Po-Han; Hwang, Gwo-Jen; Su, Liang-Hao; Huang, Yueh-Min

    2012-01-01

    The aim of nursing education is to foster in students the competence of applying integrated knowledge with clinical skills to the application domains. In the traditional approach, in-class knowledge learning and clinical skills training are usually conducted separately, such that the students might not be able to integrate the knowledge and the…

  7. A Novel Software Architecture for the Provision of Context-Aware Semantic Transport Information

    PubMed Central

    Moreno, Asier; Perallos, Asier; López-de-Ipiña, Diego; Onieva, Enrique; Salaberria, Itziar; Masegosa, Antonio D.

    2015-01-01

    The effectiveness of Intelligent Transportation Systems depends largely on the ability to integrate information from diverse sources and the suitability of this information for the specific user. This paper describes a new approach for the management and exchange of this information, related to multimodal transportation. A novel software architecture is presented, with particular emphasis on the design of the data model and the enablement of services for information retrieval, thereby obtaining a semantic model for the representation of transport information. The publication of transport data as semantic information is established through the development of a Multimodal Transport Ontology (MTO) and the design of a distributed architecture allowing dynamic integration of transport data. The advantages afforded by the proposed system due to the use of Linked Open Data and a distributed architecture are stated, comparing it with other existing solutions. The adequacy of the information generated in regard to the specific user’s context is also addressed. Finally, a working solution of a semantic trip planner using actual transport data and running on the proposed architecture is presented, as a demonstration and validation of the system. PMID:26016915

  8. Context-aware visual analysis of elderly activity in a cluttered home environment

    NASA Astrophysics Data System (ADS)

    Shoaib, Muhammad; Dragon, Ralf; Ostermann, Joern

    2011-12-01

    This paper presents a semi-supervised methodology for automatic recognition and classification of elderly activity in a cluttered real home environment. The proposed mechanism recognizes elderly activities by using a semantic model of the scene under visual surveillance. We also illustrate the use of trajectory data for unsupervised learning of this scene context model. The model learning process does not involve any supervised feature selection and does not require any prior knowledge about the scene. The learned model in turn de-fines the activity and inactivity zones in the scene. An activity zone further contains block-level reference information, which is used to generate features for semi-supervised classification using transductive support vector machines. We used very few labeled examples for initial training. Knowledge of activity and inactivity zones improves the activity analysis process in realistic scenarios significantly. Experiments on real-life videos have validated our approach: we are able to achieve more than 90% accuracy for two diverse types of datasets.

  9. A novel software architecture for the provision of context-aware semantic transport information.

    PubMed

    Moreno, Asier; Perallos, Asier; López-de-Ipiña, Diego; Onieva, Enrique; Salaberria, Itziar; Masegosa, Antonio D

    2015-01-01

    The effectiveness of Intelligent Transportation Systems depends largely on the ability to integrate information from diverse sources and the suitability of this information for the specific user. This paper describes a new approach for the management and exchange of this information, related to multimodal transportation. A novel software architecture is presented, with particular emphasis on the design of the data model and the enablement of services for information retrieval, thereby obtaining a semantic model for the representation of transport information. The publication of transport data as semantic information is established through the development of a Multimodal Transport Ontology (MTO) and the design of a distributed architecture allowing dynamic integration of transport data. The advantages afforded by the proposed system due to the use of Linked Open Data and a distributed architecture are stated, comparing it with other existing solutions. The adequacy of the information generated in regard to the specific user's context is also addressed. Finally, a working solution of a semantic trip planner using actual transport data and running on the proposed architecture is presented, as a demonstration and validation of the system. PMID:26016915

  10. A Framework for a Context-Aware Elderly Entertainment Support System

    PubMed Central

    Hossain, M. Anwar; Alamri, Atif; Almogren, Ahmad S.; Hossain, SK Alamgir; Parra, Jorge

    2014-01-01

    Elderly people constitute a major portion of world's population. Many of them are physically and mentally vulnerable and need continuous support for their health and well-being. There is a growing trend that these elderly people are placed in an ambient assisted living environment (AAL) with an aim to receive better care and support. In such settings, a lot of attention has been given to continuous health monitoring for maintaining physical health status. However, much less attention has been given toward understanding the entertainment needs of the elderly people, which is an important factor relevant to their mental health and joyful living. This paper thus addresses the entertainment needs of the elderly and proposes a framework of an elderly entertainment support system. The proposed framework enables different categories of residents (e.g., elderly people and caregivers) to access various media services in both implicit and explicit manner in order to enhance the quality of their living experience in different contexts. Our experimental results demonstrate the viability of the proposed framework. We believe that the proposed approach will establish the need to develop entertainment systems and services for the elderly people and allow us to sensibly address the problems associated with their independent, happy and active living. PMID:24936946

  11. Design of a Context Aware Multimedia Management System for Home Environments

    Microsoft Academic Search

    K. Mets; J. Nelis; D. Verslype; P. Leroux; W. Haerick; F. De Turck; C. Develder

    2009-01-01

    We present the design, implementation and performance analysis of a multimedia management system for home environments. It enables comprehensive access and control of media that is distributed over multiple devices. Based on automatic discovery of the media servers and renderers(i.e. audio or display devices) through UPnP, our application integrates all content in a single view (merging content and\\/or removing duplicate

  12. Toward Managing Uncertain Spatial Information for Situational Awareness Applications

    E-print Network

    Kalashnikov, Dmitri V.

    the excerpts from two real reports filed by Port Authority Police Department (PAPD) Officers who partici- pated consider the problem of reaching situation awareness from textual input. We propose an approach], [25], [26], [27]. In this paper, we study the problem of representing and querying uncertain location

  13. Awareness of Biotechnological Application: A Study among University Geography Students

    ERIC Educational Resources Information Center

    Ozel, Ali; Terzi, Irfan; Ozel, Emine

    2009-01-01

    The aim of this study is to measure the differences of university geography students about biotechnology. Therefore an awareness scale was developed by the researcher. 102 students from six different universities and their academic levels were included in the survey. The findings of the survey were evaluated both descriptively and statistically.…

  14. Overview of Cyber Situation Awareness

    NASA Astrophysics Data System (ADS)

    Tadda, George P.; Salerno, John S.

    Improving a decision maker’s1 situational awareness of the cyber domain isn’t greatly different than enabling situation awareness in more traditional domains2. Situation awareness necessitates working with processes capable of identifying domain specific activities as well as processes capable of identifying activities that cross domains. These processes depend on the context of the environment, the domains, and the goals and interests of the decision maker but they can be defined to support any domain. This chapter will define situation awareness in its broadest sense, describe our situation awareness reference and process models, describe some of the applicable processes, and identify a set of metrics usable for measuring the performance of a capability supporting situation awareness. These techniques are independent of domain but this chapter will also describe how they apply to the cyber domain.

  15. Using XML for Interprocess Communications in a Space Situational Awareness and Control Application

    Microsoft Academic Search

    Stuart Aldridge; Alexander D. Stoyen; Jeffrey S. Hicks; Plamen V. Petrov

    2002-01-01

    \\u000a As various militaries progress toward a network-centric environment, their dependency upon space assets is expected to grow\\u000a exponentially. It is important for the commander to be aware of the dispositions and movements in this fourth medium. The\\u000a success of terrestrial forces requires comprehensive space situational awareness (SSA). 21st Century Systems, Inc. is essentially\\u000a developing a SSA and decision support application

  16. Space Situational Awareness Applications of the PS1 AP Catalog

    Microsoft Academic Search

    D. Monet

    2006-01-01

    New requirements for accuracy, sensitivity, and timeliness in Space Situational Awareness (SSA) flow down into requirements for star catalogs that provide in-frame metrics. Star catalogs are being used to provide the (astro-)metric calibration of the focal plane sensor(s) as well as for the photometric calibration. In many cases, the SSA sensor does not have traditional astronomical filters, so the transformation

  17. Hierarchical Queue-Length-Aware Power Control for Real-Time Applications over

    E-print Network

    Wu, Dapeng Oliver

    Delay-constrained communications, power control, queuing theory, matrix-geometric method, ef- fective1 Hierarchical Queue-Length-Aware Power Control for Real-Time Applications over Wireless Networks guarantees for real-time applications over wireless networks. The power control laws that aim at optimizing

  18. WASP: Protecting Web Applications Using Positive Tainting and Syntax-Aware Evaluation

    E-print Network

    Manolios, Panagiotis "Pete"

    WASP: Protecting Web Applications Using Positive Tainting and Syntax-Aware Evaluation William G-injection Preventer (WASP) tool, which we used to perform an empirical evaluation on a wide range of Web applications that we subjected to a large and varied set of attacks and legitimate accesses. WASP was able to stop all

  19. A uniform instrumentation, event, and adaptation framework for network-aware middleware and advanced network applications

    SciTech Connect

    Reed, Daniel A.

    2003-03-14

    Developers of advanced network applications such as remote instrument control, distributed data management, tele-immersion and collaboration, and distributed computing face a daunting challenge: sustaining robust application performance despite time-varying resource demands and dynamically changing resource availability. It is widely recognized that network-aware middleware is key to achieving performance robustness.

  20. Towards Application-Aware Anonymous Routing Micah Sherr Boon Thau Loo Matt Blaze

    E-print Network

    Loo, Boon Thau

    Towards Application-Aware Anonymous Routing Micah Sherr Boon Thau Loo Matt Blaze University of Pennsylvania Abstract This paper investigates the problem of designing anonymity networks that meet application-specific performance and security constraints. We argue that existing anonymity networks take a narrow view of per

  1. Context-aware mobile health monitoring: evaluation of different pattern recognition methods for classification of physical activity.

    PubMed

    Jatobá, Luciana C; Grossmann, Ulrich; Kunze, Chistophe; Ottenbacher, Jörg; Stork, Wilhelm

    2008-01-01

    There are various applications of physical activity monitoring for medical purposes, such as therapeutic rehabilitation, fitness enhancement or the use of physical activity as context information for evaluation of other vital data. Physical activity can be estimated using acceleration sensor-systems fixed on a person's body. By means of pattern recognition methods, it is possible to identify with certain accuracy which movement is being performed. This work presents a comparison of different methods for recognition of daily-life activities, which will serve as basis for the development of an online activity monitoring system. PMID:19163901

  2. Context-Aware Sensors

    Microsoft Academic Search

    Eiman Elnahrawy; Badri Nath

    2004-01-01

    \\u000a Wireless sensor networks typically consist of a large number of sensor nodes embedded in a physical space. Such sensors are\\u000a low-power devices that are primarily used for monitoring several physical phenomena, potentially in remote harsh environments.\\u000a Spatial and temporal dependencies between the readings at these nodes highly exist in such scenarios. Statistical contextual\\u000a information encodes these spatio-temporal dependencies. It enables

  3. Social Email: A Framework and Application for More Socially-Aware Communications

    Microsoft Academic Search

    Thomas Tran; Jeff Rowe; Shyhtsun Felix Wu

    2010-01-01

    \\u000a As online social networks (OSN) attempt to mimic real life social networks, we have made progress towards using OSNs to provide\\u000a us with data to allow for richer and more robust online communications. In this paper, we present a novel approach towards\\u000a socially-aware email. Currently, email provides too little control to the recipient. Our approach, dubbed SoEmail, provides\\u000a social context

  4. Preserve Your Privacy with PCO: A Privacy Sensitive Architecture for Context Obfuscation for Pervasive E-Community Based Applications

    Microsoft Academic Search

    Farzana Rahman; Ferdaus Ahmed Kawsar; Sheikh Iqbal Ahamed

    2010-01-01

    Context awareness is just beginning to revolutionize the ways we interact with networked devices. In order for context awareness to flourish, especially in a pervasive environment, users must be certain that their privacy is respected. Privacy in pervasive online community depends on the level of granularity of the provided information, user's relation to possible recipients, and the possible usage of

  5. CONSUMER EVALUATION OF BRAND IN CONTEXT OF RELATIONSHIP BETWEEN BRAND AWARENESS, BRAND ASSOCIATION, PERCEIVED QUALITY & BRAND LOYALTY

    Microsoft Academic Search

    Pranav Desai

    This research investigated direct and indirect relationship between brand equity constructs which includes brand awareness, brand association, perceived quality, and brand loyalty. We implement Structural Equation Modelling with LISREL to examine the hypothesis. The finding showed that there is a significant and positive direct effect between brand awareness toward brand associations, and brand association toward perceived quality and brand loyalty.

  6. IQ-services: network-aware middleware for interactive large-data applications

    Microsoft Academic Search

    Zhongtang Cai; Greg Eisenhauer; Qi He; Vibhore Kumar; Karsten Schwan; Matthew Wolf

    2004-01-01

    IQ-Services are application-specific, resource-aware code modules executed by data transport middleware. They constitute a 'thin' layer between application components and the underlying computational and communication resources that implements the data manipulations necessary to permit wide-area collaborations to proceed smoothly, despite dynamic resource variations. IQ-Services interact with the application and resource layers via dynamic performance attributes, and end-to-end implementations of such

  7. IQ-services: Network-Aware Middleware for Interactive Large-Data Application

    Microsoft Academic Search

    Z Cai; G Eisenhauer; K Schwan; M Wolf

    2003-01-01

    Abstract IQ-Services are application-specific, resource-aware code modules executed by data transport middleware. They constitute a ‘thin’ layer between application components,and the underlying computational,and communication,resources that implements the data manipulations necessary to permit wide-area collaborations to proceed smoothly, despite dynamic,resource variations. IQ-Services interact with the application and resource layers via dynamic,performance attributes, and end-to-end implementations of such attributes also permit clients

  8. A Battery-Aware Algorithm for Supporting Collaborative Applications

    Microsoft Academic Search

    Sami Rollins; Jeremiah D. Porten; Kathryn Brisbin; Cheryl Chang-Yit

    There are several significant ways in which the ubiquity of battery-powered devices impacts the field of collaborative computing.\\u000a First, applications such as collaborative data gathering become possible. Also, existing applications that depend on collaborating\\u000a devices to maintain the system infrastructure must be reconsidered. The problem is that collaborative applications often require\\u000a end-user devices to perform background tasks that are not

  9. Energy-Aware Application-Centric VM Allocation for HPC Workloads

    E-print Network

    Pompili, Dario

    Energy-Aware Application-Centric VM Allocation for HPC Workloads H. Viswanathan, E.K. Lee, I- creasingly considered for traditional High-Performance Com- puting (HPC) workloads that have typically targeted Grids and conventional HPC platforms. However, maximizing energy effi- ciency, cost

  10. Application-specific network management for energy-aware streaming of popular multimedia formats

    E-print Network

    Vahdat, Amin

    Application-specific network management for energy-aware streaming of popular multimedia formats network interface (WNIC) energy consumption a particularly acute problem for mobile clients. In this work to transition the WNIC to a lower power consuming sleep state. First, we show the limitations of IEEE 802

  11. Data Aware Caching for Big-Data Applications Using MapReduce

    E-print Network

    Wu, Jie

    Data Aware Caching for Big-Data Applications Using MapReduce Yaxiong Zhao, Jie Wu #12;Outline · MapReduce and big-data · Cache description · Protocol ­ Relationship between job types and cache organization · Conclusion #12;Outline · MapReduce and big-data · Cache description · Protocol ­ Cache request and reply

  12. Energy-aware adaptation for mobile applications Jason Flinn and M. Satyanarayanan

    E-print Network

    Flinn, Jason

    their behavior to conserve energy. To guide such adaptation, the operating system monitors energy sup- ply it is scarce, the behavior is biased toward energy conservation. To validate the energy benefits of adaptationEnergy-aware adaptation for mobile applications Jason Flinn and M. Satyanarayanan School

  13. Cost-aware Cloud Bursting for Enterprise Applications1 Tian Guo, University of Massachusetts Amherst

    E-print Network

    Shenoy, Prashant

    model where the enterprise uses its own private resources for the majority of its computing, Algorithms, Performance Additional Key Words and Phrases: Hybrid Clouds, Resource Management, Live MigrationA Cost-aware Cloud Bursting for Enterprise Applications1 Tian Guo, University of Massachusetts

  14. The application of journalistic principles to freshman English: a means of emphasizing audience awareness 

    E-print Network

    Egle, Esther Beatrice

    1977-01-01

    , and the emphasis on prescriptiveness ss the key to good writing suggest that audience awareness is indeed a basic problem. The application of certain Journalistic principles to Freshman English provides a way of dealing with the problem at this fundaments1 level... in Freshman English Textbooks. The Five Most Often Used Textbooks. . Harbrace C~olle e Handbook. Wri~ini with a P~ur ose. The Practical S~t list. Words and Ideas. Modern ~En lish Handbook The Effects of Prescriptiveness. Audience Awareness...

  15. Optimizing Integrated Application Performance with Cache-aware Metascheduling

    E-print Network

    Schmidt, Douglas C.

    , Jules White1, Russell Kegley2, Jonathan Preston2, Douglas C. Schmidt3, and Aniruddha Gokhale3 1 Virginia.schmidt,a.gokhale@vanderbilt.edu, russell.b.kegley,jonathan.d.preston@lmco.com Abstract. Integrated applications running in multi

  16. Choreo: network-aware task placement for cloud applications

    E-print Network

    Deng, Shuo

    Cloud computing infrastructures are increasingly being used by network-intensive applications that transfer significant amounts of data between the nodes on which they run. This paper shows that tenants can do a better job ...

  17. A Battery-Aware Algorithm for Supporting Collaborative Applications

    Microsoft Academic Search

    Sami Rollins; Cheryl Chang-Yit

    2008-01-01

    Battery-powered devices such as laptops, cell phones, and MP3 players are becoming ubiquitous. There are several significant\\u000a ways in which the ubiquity of battery-powered technology impacts the field of collaborative computing. First, applications\\u000a such as collaborative data gathering, become possible. Also, existing applications that depend on collaborating devices to\\u000a maintain the system infrastructure must be reconsidered. Fundamentally, the problem lies

  18. A programming framework for quality-aware ubiquitous multimedia applications

    Microsoft Academic Search

    Duangdao Wichadakul; Xiaohui Gu; Klara Nahrstedt

    2002-01-01

    Ubiquitous computing promises a computing environment that seamlessly and pervasively delivers applications to the user, despite changes of resources, devices, and locations. However, few ubiquitous multimedia applications (UMAs) exist up-to-date. One of the main reasons lies in the fact that it is difficult and error-prone to build a UMA which is mobile and deployable in different ubiquitous environments, and still

  19. CLAMP : application merging in the ECOIN context mediation system using the context linking approach

    E-print Network

    Kaleem, M. Bilal (Mohammad Bilal), 1980-

    2003-01-01

    Integrating data from heterogeneous data sources means dealing with context differences. That is, differences in the assumptions that are made regarding format and interpretation of the data. The Context Interchange (COIN) ...

  20. An energy-aware routing protocol for query-based applications in wireless sensor networks.

    PubMed

    Ahvar, Ehsan; Ahvar, Shohreh; Lee, Gyu Myoung; Crespi, Noel

    2014-01-01

    Wireless sensor network (WSN) typically has energy consumption restriction. Designing energy-aware routing protocol can significantly reduce energy consumption in WSNs. Energy-aware routing protocols can be classified into two categories, energy savers and energy balancers. Energy saving protocols are used to minimize the overall energy consumed by a WSN, while energy balancing protocols attempt to efficiently distribute the consumption of energy throughout the network. In general terms, energy saving protocols are not necessarily good at balancing energy consumption and energy balancing protocols are not always good at reducing energy consumption. In this paper, we propose an energy-aware routing protocol (ERP) for query-based applications in WSNs, which offers a good trade-off between traditional energy balancing and energy saving objectives and supports a soft real time packet delivery. This is achieved by means of fuzzy sets and learning automata techniques along with zonal broadcasting to decrease total energy consumption. PMID:24696640

  1. A Survey of Context Modeling for Pervasive Cooperative Learning

    Microsoft Academic Search

    Philip Moore; Bin Hu; Xiaomei Zhu; William Campbell; Martyn Ratcliffe

    2007-01-01

    Context represents a fundamental issue in research into pervasive and cooperative computing applications. This paper presents a survey on context modelling issues, together with a discussion on approaches to context modelling in intelligent context-aware pervasive systems. There is a parametric evaluation of the approaches considered, the conclusion drawn being that ontology-based modelling approach represents the optimal approach. The paper concludes

  2. Mobile application access channels - technologies, attributes and awareness

    Microsoft Academic Search

    F. Schwenke; M. Weideman

    A current topic among role players in the mobile commerce industry is access channels. Even though some role players try to show with confidence that their preferred channels are superior to others, little of this can be proven academically. A literature study has been done to identify the available access channels for mobile applications. The study also identified different characteristics

  3. A case for application aware channel access in wireless networks

    Microsoft Academic Search

    Ashish Sharma; Elizabeth M. Belding

    2009-01-01

    The increasing reliance of users on wireless networks for Internet connectivity has posed two significant challenges for mobile networking research. The first challenge is to provide high quality of service for interactive real-time applications such as VoIP and video conferencing. The second challenge is to reduce the energy consumption of mobile devices and improve battery life. Past research has focused

  4. Panorama: A Semantic-Aware Application Search Framework

    E-print Network

    Ng, Wilfred Siu Hung

    Third-party applications (or commonly referred to the apps) proliferate on the web and mobile platforms In recent years, apps that are developed for the web and mobile devices have quickly become a million in recent years. The tremendous amount of available apps in app market- places suggests the necessity

  5. Metaphor, Modality, and Context: Improved user interface design for audio and music applications

    Microsoft Academic Search

    Andy Sarroff

    The sophistication of modern audio and music computing environments has placed new demands on informational sharing and interchange between computers and users. Multiple input\\/output modalities, better use of metaphor, and implementation of context awareness can smoothen and enhance a user's experience. This paper explores how these changes are being implemented in musical, auditory, and related fields. A model for interface

  6. J. PERVASIVE COMPUT. & COMM. 1 (1), MARCH 2005. c TROUBADOR PUBLISHING LTD) 1 A Context-Aware Preference Database System

    E-print Network

    Pitoura, Evaggelia

    -Aware Preference Database System Kostas Stefanidis Department of Computer Science, University of Ioannina, Greece, kstef@cs.uoi.gr Evaggelia Pitoura Department of Computer Science, University of Ioannina, Greece, pitoura@cs.uoi.gr Panos Vassiliadis Department of Computer Science, University of Ioannina, Greece

  7. Understanding Total Quality Management in Context: Qualitative Research on Managers' Awareness of TQM Aspects in the Greek Service Industry

    ERIC Educational Resources Information Center

    Psychogios, Alexandros G.; Priporas, Constantinos-Vasilios

    2007-01-01

    This study addresses managers' awareness and familiarity with Total Quality Management (TQM). Eighteen (18) semi-structured, in-depth interviews were conducted with managers working in a variety of service organizations in Greece. The major argument of the study is that although the acronym TQM and some of its concepts and practices are known by a…

  8. An Application-Aware Event-Oriented MAC Protocol in Multimodality Wireless Sensor Networks

    Microsoft Academic Search

    Junzhao Du; Weisong Shi

    2006-01-01

    In this paper, we design and implement an application-aware, event-oriented MAC protocol (App-MAC) for event-driven multimodality\\u000a WSN applications. We leverage the advantages of contention-based and reservation-based MAC protocols to coordinate the channel\\u000a access, and propose channel contention and reservation algorithms to adaptively allocate channel time slots according to application\\u000a requirements and current events status. To evaluate the proposed App-MAC, we

  9. Jabber-based Cross-Domain Efficient and Privacy-Ensuring Context Management Framework

    Microsoft Academic Search

    Sally Smith Xiaodong Liu Zakwan Jaroucheh

    2013-01-01

    in pervasive environments, context-aware applications require a global knowledge of the context information distributed in different spatial domains in order to establish context-based interactions. Therefore, the design of distributed storage, retrieval, and dissemination mechanisms of context information across domains becomes vital. In such environments, we envision the necessity of collaboration between different context servers distributed in different domains; thus, the

  10. 'I Know That You Know' - Ascertaining Mutual Awareness of Recipient's Availability Status in Instant Messaging Applications

    Microsoft Academic Search

    Agnieszka Matysiak Szóstek; Berry Eggen

    2009-01-01

    This study investigated ways to attain mutual, reciprocal awareness of recipient’s availability status in Instant Messaging\\u000a (IM) applications. For that purpose we designed, implemented and tested a prototype of an IM system named DoNTBother. The analysis of the quantitative and qualitative results showed that displaying status indication in the chat box\\u000a encouraged participants to show more respect towards the communicative

  11. Antibody performance in western blot applications is context-dependent.

    PubMed

    Algenäs, Cajsa; Agaton, Charlotta; Fagerberg, Linn; Asplund, Anna; Björling, Lisa; Björling, Erik; Kampf, Caroline; Lundberg, Emma; Nilsson, Peter; Persson, Anja; Wester, Kenneth; Pontén, Fredrik; Wernérus, Henrik; Uhlén, Mathias; Ottosson Takanen, Jenny; Hober, Sophia

    2014-03-01

    An important concern for the use of antibodies in various applications, such as western blot (WB) or immunohistochemistry (IHC), is specificity. This calls for systematic validations using well-designed conditions. Here, we have analyzed 13?000 antibodies using western blot with lysates from human cell lines, tissues, and plasma. Standardized stratification showed that 45% of the antibodies yielded supportive staining, and the rest either no staining (12%) or protein bands of wrong size (43%). A comparative study of WB and IHC showed that the performance of antibodies is application-specific, although a correlation between no WB staining and weak IHC staining could be seen. To investigate the influence of protein abundance on the apparent specificity of the antibody, new WB analyses were performed for 1369 genes that gave unsupportive WBs in the initial screening using cell lysates with overexpressed full-length proteins. Then, more than 82% of the antibodies yielded a specific band corresponding to the full-length protein. Hence, the vast majority of the antibodies (90%) used in this study specifically recognize the target protein when present at sufficiently high levels. This demonstrates the context- and application-dependence of antibody validation and emphasizes that caution is needed when annotating binding reagents as specific or cross-reactive. WB is one of the most commonly used methods for validation of antibodies. Our data implicate that solely using one platform for antibody validation might give misleading information and therefore at least one additional method should be used to verify the achieved data. PMID:24403002

  12. Morphological awareness assessment and intervention to improve language and literacy.

    PubMed

    Wolter, Julie A; Gibson, Frances E

    2015-02-01

    Morphological awareness positively influences language and literacy development and may be an ideal intervention focus for improving vocabulary, sight word reading, reading decoding, and reading comprehension in students with and without language and literacy deficits. This article will provide supporting theory, research, and strategies for implementing morphological awareness intervention with students with language and literacy deficits. Additionally, functional connections are explored through the incorporation and application of morphological awareness intervention in academic literacy contexts linked to Common Core State Standards. PMID:25633142

  13. Towards A General Approach for Reasoning about Context, Situations and Uncertainty in Ubiquitous Sensing: Putting Geometrical Intuitions to Work 1

    E-print Network

    Loke, Seng W. - Loke, Seng W.

    environments and the diversity of possible situations that may affect context-aware applications' behaviorTowards A General Approach for Reasoning about Context, Situations and Uncertainty in Ubiquitous necessitate investigation of context awareness that would provide feasible solutions by means of models

  14. Separation, Review and Supervision Controls in the Context of a Credit Application Process

    E-print Network

    Moffett, Jonathan

    application process at the branch level of a bank. The case study has been performed in the contextSeparation, Review and Supervision Controls in the Context of a Credit Application Process ­ A Case application process is used to discuss these organisational controls. Categories and Subject Descriptors H.1

  15. A Middleware Framework for Ambiguous Context Mediation in Smart Healthcare Application

    Microsoft Academic Search

    Nirmalya Roy; Gautham Pallapa; Sajal K. Das

    2007-01-01

    Ubiquitous healthcare applications envision future computing and networking environments as being filled with sensors that can determine various types of contexts of its inhabitants, such as location, activity and vital signs. While such information is useful in providing context-sensitive services to the inhabitants to promote intelligent independent living, however in reality, both sensed and interpreted contexts may often be ambiguous.

  16. Data Diffusion: Dynamic Resource Provision and Data-Aware Scheduling for Data Intensive Applications

    E-print Network

    Raicu, Ioan; Foster, Ian; Szalay, Alex

    2008-01-01

    Data intensive applications often involve the analysis of large datasets that require large amounts of compute and storage resources. While dedicated compute and/or storage farms offer good task/data throughput, they suffer low resource utilization problem under varying workloads conditions. If we instead move such data to distributed computing resources, then we incur expensive data transfer cost. In this paper, we propose a data diffusion approach that combines dynamic resource provisioning, on-demand data replication and caching, and data locality-aware scheduling to achieve improved resource efficiency under varying workloads. We define an abstract "data diffusion model" that takes into consideration the workload characteristics, data accessing cost, application throughput and resource utilization; we validate the model using a real-world large-scale astronomy application. Our results show that data diffusion can increase the performance index by as much as 34X, and improve application response time by ov...

  17. Website Analysis in an EFL Context: Content Comprehension, Perceptions on Web Usability and Awareness of Reading Strategies

    ERIC Educational Resources Information Center

    Roy, Debopriyo; Crabbe, Stephen

    2015-01-01

    Website analysis is an interdisciplinary field of inquiry that focuses on both digital literacy and language competence (Brugger, 2009). Website analysis in an EFL learning context has the potential to facilitate logical thinking and in the process develop functional language proficiency. This study reported on an English language website…

  18. Resolving and Mediating Ambiguous Contexts for Pervasive Care Environments

    E-print Network

    Julien, Christine

    ), context state (Si) and situation space (Ri), and attempts to incorporate various intuitions that should, a significant challenge facing the development of realistic and deployable context-aware services for healthcare applications is the ability to deal with ambiguous contexts to prevent hazardous situations. In this work, we

  19. Using Web technologies in assessment of context-aware pervasive\\/ubiquitous systems: A tourist guide service

    Microsoft Academic Search

    W. R. Pires; Antonio A. F. Loureiro; Ricardo A. R. Oliveira

    2010-01-01

    An important aspect in the design of pervasive\\/ubiquitous applications is to evaluate them before their deployment in real scenarios. A possible strategy to assess them is to perform simulations that provide useful insights and results to the application designer. However, the simulation of pervasive\\/ubiquitous applications and environments has proven to be a considerable challenge for several reasons. For instance, many

  20. FRAMEWORK FOR A CONTEXT-AWARE MOBILE E- HEALTH SERVICE DISCOVERY INFRASTRUCTURE FOR RURAL\\/SUBURBAN HEALTHCARE

    Microsoft Academic Search

    MATTHEW O. ADIGUN

    2009-01-01

    Research efforts have produced a lot of applications and hardware devices for healthcare services especially in the developed world. However, much still left to be desire in mobile wireless healthcare research that produces semantic web services applications solution especially for the developing African countries. The first successful implementation of a mobile wireless application for the healthcare industry in the United

  1. Data security in location-aware applications: an approach based on RBAC

    Microsoft Academic Search

    M. L. Damiani; E. Bertino; P. Perlasca

    2007-01-01

    Data security in a mobile context is a critical issue. Over the last few years a new category of location-based services, the Enterprise LBS (ELBS), has emerged focusing on the demands of mobility in organisations. These applications pose challenging requirements, including the need of selective access to ELBS based on the position of mobile users and spatially bounded organisational roles.

  2. A Survey of Self-Awareness and Its Application in Computing Systems Peter R. Lewis, Arjun Chandra, Shaun Parsons, Edward Robinson, Kyrre Glette,

    E-print Network

    Yao, Xin

    A Survey of Self-Awareness and Its Application in Computing Systems Peter R. Lewis, Arjun Chandra to be self-aware and be able to self-express becomes important. This paper surveys definitions and current understanding of self-awareness and self-expression in biology and cognitive science. Subsequently, previous

  3. Dedicated Programming Support for Context-aware Ubiquitous Applications Malte Appeltauer

    E-print Network

    Weske, Mathias

    -Plattner-Institut Universität Potsdam Germany malte.appeltauer@hpi.uni-potsdam.de Robert Hirschfeld Hasso-Plattner-Institut Universität Potsdam Germany hirschfeld@hpi.uni-potsdam.de Tobias Rho Institut für Informatik Universität Bonn

  4. Image Recognition in Context: Application to Microscopic Urinalysis

    Microsoft Academic Search

    Xubo B. Song; Joseph Sill; Yaser S. Abu-mostafa; Harvey Kasdan

    1999-01-01

    Abstract We propose a new and efficient technique for incorporating co ntextual information into object classification. Most of the current techniq ues face the problem of exponential computation cost. In this paper, we propose a new general framework that incorporates partial context at a linear cost. This technique is applied to microscopic urinalysis image recognition, resulting in a significant improvement

  5. Semantic-Aware Automatic Parallelization of Modern Applications Using High-Level Abstractions

    SciTech Connect

    Liao, C; Quinlan, D J; Willcock, J J; Panas, T

    2009-12-21

    Automatic introduction of OpenMP for sequential applications has attracted significant attention recently because of the proliferation of multicore processors and the simplicity of using OpenMP to express parallelism for shared-memory systems. However, most previous research has only focused on C and Fortran applications operating on primitive data types. Modern applications using high-level abstractions, such as C++ STL containers and complex user-defined class types, are largely ignored due to the lack of research compilers that are readily able to recognize high-level object-oriented abstractions and leverage their associated semantics. In this paper, we use a source-to-source compiler infrastructure, ROSE, to explore compiler techniques to recognize high-level abstractions and to exploit their semantics for automatic parallelization. Several representative parallelization candidate kernels are used to study semantic-aware parallelization strategies for high-level abstractions, combined with extended compiler analyses. Preliminary results have shown that semantics of abstractions can help extend the applicability of automatic parallelization to modern applications and expose more opportunities to take advantage of multicore processors.

  6. Role Based Access Control with Spatiotemporal Context for Mobile Applications

    Microsoft Academic Search

    Subhendu Aich; Samrat Mondal; Shamik Sural; Arun Kumar Majumdar

    2009-01-01

    Role based access control (RBAC) is an established paradigm in resource protection. However, with the proliferation of mobile\\u000a computing, it is being frequently observed that the RBAC access decision is directly influenced by the spatiotemporal context\\u000a of both the subjects and the objects in the system. Currently, there are only a few models (STRBAC, GSTRBAC) in place which\\u000a specify spatiotemporal

  7. Security Challenges of Location-Aware Mobile Business

    Microsoft Academic Search

    Emin Islam Tatli; Dirk Stegemann; Stefan Lucks

    2005-01-01

    In addition to mobility, the ability of context awareness and especially location awareness has greatly enhanced the opportunities of mobile businesses. Many different kinds of context-aware services ranging from \\

  8. The ecological context and population redistribution: an application of the human ecological framework

    E-print Network

    deMontel, John Edmond

    1985-01-01

    THE ECOLOGICAL CONTEXT AND POPULATION REDISTRIBUTION: AN APPLICATION OF THE HUMAN ECOLOGICAL FRAMENORK A Thesis by JOHN EDMOND deMONTEL Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE December 1985 Ma j or Subject: Sociology THE ECOLOGICAL CONTEXT AND POPULATION REDISTRIBUTION: AN APPLICATION OF THE HUMAN ECOLOGICAL FRAMEWORK A Thesis by JOHN EDNOND deMONTEL Approved as to style and content by...

  9. Building Reliable MobileAware Applications using the Rover Toolkit Anthony D. Joseph and M. Frans Kaashoek

    E-print Network

    Building Reliable Mobile­Aware Applications using the Rover Toolkit Anthony D. Joseph and M. Frans@lcs.mit.edu Abstract This paper discusses extensions to the Rover toolkit for construct­ ing reliable mobile clients responsible for guaranteeing request completion at servers as was done originally in Rover

  10. Computer applications in the context of financial speculation

    Microsoft Academic Search

    Crescenzio Gallo; Michelangelo De Bonis; Pierpaolo Palazzo

    2012-01-01

    Prediction of various market indicators is an important issue in finance. This can be accomplished through computer models and related applications to finance, and in particular through Artificial Neural Networks (ANNs) which have been used in stock market prediction and exchange rates during the last decade. The prediction of financial values (such as stock\\/exchange rate index as well as daily

  11. Application-Aware Scheduling of a Magnetohydrodynamics Application in the Legion Metasystem

    Microsoft Academic Search

    Holly Dail; Graziano Obertelli; Francine Berman; Richard Wolski; Andrew S. Grimshaw

    2000-01-01

    Computational Grids have become an important and popular computing platform for both scientific and commer- cial distributed computing communities. However, users of such systems typically find achievement of application ex- ecution performance remains challenging. Although Grid infrastructures such as Legion and Globus provide basic re- source selection functionality, work allocation functional- ity, and scheduling mechanisms, applications must interpret system performance

  12. The Joint Milli-Arcsecond Pathfinder Survey (J-MAPS) Mission: Application for Space Situational Awareness

    NASA Astrophysics Data System (ADS)

    Gaume, R.; Dorland, B.

    Rapid and accurate threat assessment and characterization are key elements in the quest for space superiority. These often depend on rapid orbit determination, accurate orbit propagation and object characterization. Threat scenarios involving new launches or vehicle maneuvers demand rapid and precise position metrics to determine and propagate new orbital elements. Existing and planned ground and space-based optical surveillance systems are optimized for the detection of Resident Space Objects (RSOs), which unfortunately, compromises their ability to determine position metrics at the highest possible accuracy levels. A Space Situational Awareness (SSA) architecture would potentially benefit from supplementing existing and planned detection assets with a dedicated high metric accuracy orbit determination asset or assets, with the potential for 24/7 taskability and near-real time capability. By optimizing an instrument to perform position measurement rather than detection, significant improvement may be realized in rapid orbit determination vs. current and envisioned systems, enabling rapid and accurate threat assessment and characterization. The United States Naval Observatory (USNO) is developing the space-based J-MAPS mission to support current and future star catalog and star tracker requirements. By its very nature, USNO's J-MAPS mission, a microsatellite designed to take very high precision measurements of star positions (astrometry), is ideally suited to make high metric accuracy measurements for brighter GEO RSOs. The J-MAPS mission will demonstrate novel and innovative measurement techniques and technologies, including new focal plane technologies such as CMOSHybrid active pixel sensors. The J-MAPS baseline also includes a novel filter-grating wheel, of interest in the area of non-resolved object characterization. We discuss the status of the J-MAPS mission, including the current mission baseline, and discuss Space Situational Awareness applications of the J-MAPS mission, including RSO orbit determination and SOI.

  13. The context and application of ligand field theory

    Microsoft Academic Search

    Malcolm Gerloch; John H. Harding; R. Guy Woolley

    A formal development of ligand field theory from the elements of quantum chemistry is traced to provide an explicit contect\\u000a for its procedures and practice. The nature of the assumptions and limitations of ligand field theory in general is described\\u000a and the significance of interelectron repulsion and spin-orbit coupling parameters within its application is discussed. Finally,\\u000a a detailed justification for

  14. Context Passive gathering of information Experiments Integrated behavioral dvfs method Hydrasim Measuring and Characterizing HPC applications

    E-print Network

    Lefèvre, Laurent

    Measuring and Characterizing HPC applications and CPU/GPU simulation Georges Da Costa IRIT, Toulouse University GreenDays@Lyon, 2012 Georges Da Costa IRIT, Toulouse University Measuring and Characterizing HPC Measuring and Characterizing HPC applications and CPU/GPU simulation #12;Context Passive gathering

  15. Usability Evaluation And Context Analysis To Aid The Development Of Virtual Reality Applications

    E-print Network

    Zudilova-Seinstra, Elena

    Usability Evaluation And Context Analysis To Aid The Development Of Virtual Reality Applications examines usability issues development teams of Virtual Reality (VR) systems currently encounter and studies of virtual reality applications, Journal of Virtual Reality, 7(3), 177-186. H.S.M. Cramer, V. Evers, E

  16. High Performance Computing Software Applications Institute for Space Situational Awareness (HSAI-SSA)

    NASA Astrophysics Data System (ADS)

    Sabol, C.; Schumacher, P.; Duncan, B.

    This poster paper firstly provides a status of the Institute project team's work to date over the past year, starting with brief HSAI background from the Department of Defense (DOD) High Performance Computing Modernization Program (DOD HPCMP). HSAI-SSA is one of only nine DOD institute projects that have been selected by the Deputy Under Secretary of Defense (Science and Technology) to focus and use advanced computational science and high performance computing to accelerate solving the DOD's highest priority challenges and make important advances in research, development, test, and evaluation. HSAI-SSA is the only DOD institute project focused on Space. We next describe Space Situational Awareness (SSA), how its many challenges necessitate supercomputing, and identify the type of disciplines required to solve many SSA problems; and the role of the Institute, which is led by the Air Force Research Laboratory AFRL/RD Directorate and an Onsite Director located on Maui. We then follow with a short discussion of the vision, mission, and overview of the Institute's strategic goals and core competencies. HSAI-SSA core competencies include Image Enhancement, Astrodynamics, Non-Resolvable Satellite Characterization, Data Integration, and High Performance Computing. We then follow up with and most of the poster shows and discusses the technical status for several of our current software applications projects and show the high performance computing metrics we have been able to achieve to date. In closing, we quickly summarize HSAI-SSA challenges, members and partners, and technology transition payoffs for selected applications and users.

  17. Design and Implementation of a Large-Scale Context Fusion Network

    E-print Network

    Kotz, David

    this process, computing higher-level understanding from lower-level sensory data, "context fusion". The output context- aware applications to select distributed data sources and compose them with customized data-fusion computes high-level understandings of its execution context from low-level sensory data. Multiple graphs

  18. Experience Explorer: A Life-Logging Platform Based on Mobile Context Collection

    Microsoft Academic Search

    Petros Belimpasakis; Kimmo Roimela; Yu You

    2009-01-01

    As mobile smart phones are being equipped with multiple radio interfaces and sensors, they are becoming capable of continuously collecting context information related to the users and the environment. This information can be utilized in different applications and services for providing rich, context-aware experiences. In this paper, we present a client-server platform that enables life logging, via mobile context collection,

  19. Modelling turbulent separated flow in the context of aerodynamic applications

    NASA Astrophysics Data System (ADS)

    Leschziner, M. A.

    2006-02-01

    In contrast to rapid advances in computing, numerical methods and visualisation, the predictive capabilities of statistical models of turbulence are limited and improve only slowly, despite much intensive research in the recent past. The intuitive nature of turbulence modelling, its strong reliance on calibration and validation, the extreme sensitivity of model performance to seemingly minor variations in modelling details and flow conditions, and the fact that the non-local dynamics of turbulence are not well captured by single-point closure, all conspire to make turbulence modelling an especially demanding component of CFD, but one that is crucially important for the correct prediction of complex flows. This applies in particular to separation from streamlined bodies, which is, from a computational point of view, the most challenging flow feature in aeronautical CFD. This paper reviews some aspects of the foundation and application of turbulence models to flows that relate to aeronautical practice, with particular emphasis being placed on turbulence-transport models at a closure level higher than that based on the Boussinesq-viscosity hypothesis. Following a review of basic modelling issues, including aspects of linear-eddy-viscosity two-equation modelling, some recent experience and current work on predicting separation from continuous surfaces with non-linear eddy-viscosity models and second-moment closure are reported. The predictive performance of several anisotropy-resolving models is illustrated by reference to computational solutions for a number of flows, both two- and three-dimensional, some compressible and others incompressible.

  20. Ceramic-polymer capacitive sensors for tactile/force awareness in harsh environment robotic applications

    NASA Astrophysics Data System (ADS)

    Weadon, Timothy L.; Evans, Thomas H.; Sabolsky, Edward M.

    2013-12-01

    The need for force feedback and spatial awareness of contact in harsh environment applications, such as space servicing, has been unsatisfied due to the inability of current sensor technology to resist environmental effects. In this work, capacitive sensors based on a thick film 0:3 connectivity ceramic:polymer composite structure were evaluated for potential use in future operations within robotic end effectors, withstanding temperatures ranging from -80?° C to 120?° C and forces up to 350 kPa. A thick film design is utilized to allow for ease of embedding, allowing sensors to be implemented into exciting robotic hardware with minimal intrusion, and protecting sensors from electron bombardment, radiation, and point concentrations from metal-on-metal contact. Taguchi design of experiments allows composition variables including sensor thickness, ceramic composition, ceramic particle size, ceramic volume loading, polymer character, modifier character, and the polymer:modifier ratio to be evaluated simultaneously. Dynamic thermal and mechanical loading techniques were implemented to characterize the composite sensors with in situ electrical acquisition. Individual composition variables were linked to the sensor magnitude, sensitivity, drift, and hysteresis, showing that the sensor response is optimized with a thickness of single microns, 10 vol% loading of nano-particle ceramics, and high molecular weight polymers with a low content of simple architecture modifiers lacking glass or melting temperatures in the working range.

  1. Optimus: A Parallel Optimization Framework With Topology Aware PSO and Applications

    E-print Network

    instances (islands or swarms) as required by the optimization algorithm. Figure 2 illustrates the algorithm. 2: Cooperative Multi-Swarm Optimization Framework with algorithm to system architecture mapping supercomputing architectures. Addition- ally, we designed TAPSO (Topology Aware Particle Swarm Optimization

  2. TIME-FREQUENCY-PHASE TRACKING APPROACH : APPLICATION TO UNDERWATER SIGNALS IN A PASSIVE CONTEXT

    E-print Network

    Paris-Sud XI, Université de

    TIME-FREQUENCY-PHASE TRACKING APPROACH : APPLICATION TO UNDERWATER SIGNALS IN A PASSIVE CONTEXT of time-frequency representations deals with the analysis of the signal issued from natural environment of the information carried out by the natural signals. Taken into account the non-linear multi-component time-frequency

  3. Block model in a multi facies context -Application to a porphyry copper deposit

    E-print Network

    Paris-Sud XI, Université de

    Block model in a multi facies context - Application to a porphyry copper deposit Serge Antoine spatial proportions of facies (unit), (2) estimating the grades, facies by facies, and (3) combining where facies and grades are known, what is the best way to build a block model? We propose

  4. Using Simplified Regulated Breathing with an Adolescent Stutterer: Application of Effective Intervention in a Residential Context

    ERIC Educational Resources Information Center

    Freeman, Kurt A.; Friman, Patrick C.

    2004-01-01

    Simplified regulated breathing (SRB) has been demonstrated to reduce or eliminate stuttering in children. However, much of the current research has evaluated the intervention with school-aged children within educational contexts. In the current case report, we extended the application of SRB by evaluating its effectiveness in treating stuttering…

  5. Mirth and Murder: Crime Scene Investigation as a Work Context for Examining Humor Applications

    Microsoft Academic Search

    Gene L. Roth; Brian Vivona

    2010-01-01

    Within work settings, humor is used by workers for a wide variety of purposes. This study examines humor applications of a specific type of worker in a unique work context: crime scene investigation. Crime scene investigators examine death and its details. Members of crime scene units observe death much more frequently than other police officers and they encounter extremely graphic

  6. Anesthesia Awareness

    MedlinePLUS

    Anesthesia Awareness Very rarely – in only one or two out of every 10,000 medical procedures involving anesthesia – a patient may become aware or conscious. The condition – called anesthesia awareness – means the patient can recall the surroundings ...

  7. High Performance Computing Software Applications for Space Situational Awareness Dr. Concetto R. Giuliano, Dr. Paul W. Schumacher Jr., Dr. Charles L. Matson

    Microsoft Academic Search

    R. Bruce Duncan; Robert DeSonia; George Gusciora; Kevin Roe; Kathy J. Borelli

    The High Performance Computing Software Applications Institute for Space Situational Awareness (HSAI-SSA) has completed its first full year of applications development. The emphasis of our work in this first year was in improving space surveillance sensor models and image enhancement software. These applications are the Space Surveillance Network Analysis Model (SSNAM), the Air Force Space Surveillance Fence System simulation (SimFence),

  8. Exchanging the Context between OGC Geospatial Web clients and GIS applications using Atom

    NASA Astrophysics Data System (ADS)

    Maso, Joan; Díaz, Paula; Riverola, Anna; Pons, Xavier

    2013-04-01

    Currently, the discovery and sharing of geospatial information over the web still presents difficulties. News distribution through website content was simplified by the use of Really Simple Syndication (RSS) and Atom syndication formats. This communication exposes an extension of Atom to redistribute references to geospatial information in a Spatial Data Infrastructure distributed environment. A geospatial client can save the status of an application that involves several OGC services of different kind and direct data and share this status with other users that need the same information and use different client vendor products in an interoperable way. The extensibility of the Atom format was essential to define a format that could be used in RSS enabled web browser, Mass Market map viewers and emerging geospatial enable integrated clients that support Open Geospatial Consortium (OGC) services. Since OWS Context has been designed as an Atom extension, it is possible to see the document in common places where Atom documents are valid. Internet web browsers are able to present the document as a list of items with title, abstract, time, description and downloading features. OWS Context uses GeoRSS so that, the document can be to be interpreted by both Google maps and Bing Maps as items that have the extent represented in a dynamic map. Another way to explode a OWS Context is to develop an XSLT to transform the Atom feed into an HTML5 document that shows the exact status of the client view window that saved the context document. To accomplish so, we use the width and height of the client window, and the extent of the view in world (geographic) coordinates in order to calculate the scale of the map. Then, we can mix elements in world coordinates (such as CF-NetCDF files or GML) with elements in pixel coordinates (such as WMS maps, WMTS tiles and direct SVG content). A smarter map browser application called MiraMon Map Browser is able to write a context document and read it again to recover the context of the previous view or load a context generated by another application. The possibility to store direct links to direct files in OWS Context is particularly interesting for GIS desktop solutions. This communication also presents the development made in the MiraMon desktop GIS solution to include OWS Context. MiraMon software is able to deal either with local files, web services and database connections. As in any other GIS solution, MiraMon team designed its own file (MiraMon Map MMM) for storing and sharing the status of a GIS session. The new OWS Context format is now adopted as an interoperable substitution of the MMM. The extensibility of the format makes it possible to map concepts in the MMM to current OWS Context elements (such as titles, data links, extent, etc) and to generate new elements that are able to include all extra metadata not currently covered by OWS Context. These developments were done in the nine edition of the OpenGIS Web Services Interoperability Experiment (OWS-9) and are demonstrated in this communication.

  9. Security Risk Assessment of Decentralized, Mobile Applications: An Analysis of Location Aware Systems

    Microsoft Academic Search

    Amy W. Ray; Julian J. Ray

    2005-01-01

    Technological improvements, declining costs and mandates to suppliers from large entities such as Wal-Mart and the Department of Defense are driving investments in RFID and other location aware systems (LAS). Expected benefits from LAS investments include improvements in supply chain integration and streamlined operations. However, LAS may introduce a number of new information security vulnerabilities into organizations that must be

  10. Daytime Image Measurement and Reconstruction for Space Situational Awareness Applications (Paper ID number 4231324)

    Microsoft Academic Search

    M. Roggemann; D. Douglas; E. Therkildsen; D. Archambeault; R. Maeda; D. Schultz; B. Wheeler

    2010-01-01

    An operational technology for imaging satellites during the daytime hours would vastly increase the ability of optical space situational awareness (SSA) systems to gather information about satellites. During the day the atmospheric seeing is generally worse than in terminator, and the contribution of sky background noise to the image measurement is significant. We have developed a straightforward model for estimating

  11. A Novel Audiovisual Brain-Computer Interface and Its Application in Awareness Detection

    PubMed Central

    Wang, Fei; He, Yanbin; Pan, Jiahui; Xie, Qiuyou; Yu, Ronghao; Zhang, Rui; Li, Yuanqing

    2015-01-01

    Currently, detecting awareness in patients with disorders of consciousness (DOC) is a challenging task, which is commonly addressed through behavioral observation scales such as the JFK Coma Recovery Scale-Revised. Brain-computer interfaces (BCIs) provide an alternative approach to detect awareness in patients with DOC. However, these patients have a much lower capability of using BCIs compared to healthy individuals. This study proposed a novel BCI using temporally, spatially, and semantically congruent audiovisual stimuli involving numbers (i.e., visual and spoken numbers). Subjects were instructed to selectively attend to the target stimuli cued by instruction. Ten healthy subjects first participated in the experiment to evaluate the system. The results indicated that the audiovisual BCI system outperformed auditory-only and visual-only systems. Through event-related potential analysis, we observed audiovisual integration effects for target stimuli, which enhanced the discriminability between brain responses for target and nontarget stimuli and thus improved the performance of the audiovisual BCI. This system was then applied to detect the awareness of seven DOC patients, five of whom exhibited command following as well as number recognition. Thus, this audiovisual BCI system may be used as a supportive bedside tool for awareness detection in patients with DOC. PMID:26123281

  12. Situational awareness with real time IP applications over next generation packet processing satellites

    Microsoft Academic Search

    Sridhar Chandrasekharan; Steve Arnold; Rajeev Gopal

    2008-01-01

    A complete situational awareness requires that an interested party be able to receive information form multiple sources at the same time. With bent pipe satellites a destination terminal can receive data only from a single source terminal at any given time. We analyze the key features of the next generation satellites that have packet processing capability within the satellite. An

  13. Awareness, knowledge and application of memory rehabilitation among community psychiatric nurses working with dementia

    Microsoft Academic Search

    Susan M. B. Cross; Niall M. Broomfield; Rachel Davies; Jonathan J. Evans

    2008-01-01

    This paper aims to establish the extent to which memory rehabilitation is carried out by Community Psychiatric Nurses (CPNs) working with dementia; to investigate awareness and knowledge of memory rehabilitation and memory processes amongst CPNs; and to explore the factors that influence deployment of memory rehabilitation advice. Participants, consisting of sixty five Community Psychiatric Nursing staff working in Community Mental

  14. Location aware applications for smart cities with Google maps and GIS tools

    Microsoft Academic Search

    Siak Chuan Tan; On Wong

    2006-01-01

    The release of internet mapping API like Google maps had changed the way many location aware systems works, this paper will look into how location visualization tools can make use of this new way in providing location service. With the emergence of wireless broadband internet in increasing number of cities, digital cities are being developed all over the world where

  15. Development, Awareness and Inductive Selectivity

    ERIC Educational Resources Information Center

    Hayes, Brett K.; Lim, Melissa

    2013-01-01

    Two studies examined whether adults and children could learn to make context-dependent inferences about novel stimuli and the role of awareness of context cues in such learning. Participants were trained to match probes to targets on the basis of shape or color with the relevant dimension shifting according to item context. A selective induction…

  16. An approach to domain-based scalable context management architecture in pervasive environments

    Microsoft Academic Search

    Zakwan Jaroucheh; Xiaodong Liu; Sally Smith

    In pervasive environments, context management systems are expected to administrate large volume of contextual information\\u000a that is captured from spatial to nonspatial elements. Research in context-aware computing produced a number of middleware\\u000a systems for context management to intermediate the communications between applications and context providers. In particular,\\u000a in pervasive environments, the design of distributed storage, retrieval and propagation mechanisms of

  17. The benefit of using SIM application toolkit in the context of near field communication applications

    Microsoft Academic Search

    Gerald Madlmayr; Oliver Dillinger; Josef Langer; Christoph Schaffer; Christian Kantner; Josef Scharinger

    2007-01-01

    NFC is one of the most promising technologies in handsets for business applications like ticketing or payment. Actually those applications require a secure store for keeping sensitive data. Using the SIM card as a removable secure element for proximity applications is one option. We will elaborate a comprehensive study on the requirements and impacts of using the SIM card as

  18. Design and Implementation of a Large-Scale Context Fusion Network

    Microsoft Academic Search

    Guanling Chen; Ming Li; David Kotz

    2004-01-01

    In this paper we motivate a Context Fusion Network (CFN), an infrastructure model that allows context- aware applications to select distributed data sources and compose them with customized data-fusion opera- tors into a directed acyclic information fusion graph. Such a graph represents how an application computes high-level understandings of its execution context from low-level sensory data. Multiple graphs by different

  19. Overview of Cyber Situation Awareness

    Microsoft Academic Search

    George P. Tadda; John S. Salerno

    2010-01-01

    Improving a decision maker's1 situational awareness of the cyber domain isn't greatly different than enabling situation awareness in more traditional domains2. Situation awareness necessitates working with processes capable of identifying domain specific activities as well as processes capable of identifying activities that cross domains. These processes depend on the context of the environment, the domains, and the goals and interests

  20. Overview of Cyber Situation Awareness

    Microsoft Academic Search

    George P. Tadda; John S. Salerno

    Improving a decision maker’s1 situational awareness of the cyber domain isn’t greatly different than enabling situation awareness in more traditional domains2. Situation awareness necessitates working with processes capable of identifying domain specific activities as well as processes\\u000a capable of identifying activities that cross domains. These processes depend on the context of the environment, the domains,\\u000a and the goals and interests

  1. Important context changes for talking and text messaging during homeward commutes

    Microsoft Academic Search

    Martin Colbert; David Livingstone

    2006-01-01

    This paper models the suitability of homeward commutes as a context for talking on a mobile telephone and text messaging. Analysis of these models identifies when and where large changes in suitability frequently arise. To bring commuters the greatest benefits, these are the changes upon which future applications of context-sensitivity and awareness need to focus.

  2. Mobile Applications for Police Officers

    Microsoft Academic Search

    Harry Bouwman; Timber Haaker; Henny de Vos

    2008-01-01

    This paper focuses on the design parameters on the part of the stakeholders and users in the design of mobile applications for police officers. Starting from an analysis of the functional requirements of stakeholders and relevant context parameters for police officers, we find design issues that are relevant to the development of context-aware mobile applications for police officers. We collected

  3. A Design Framework for Awareness Systems

    NASA Astrophysics Data System (ADS)

    Markopoulos, Panos

    This chapter discusses the design of awareness systems, whose main function is a social one, namely, to support social communication, mediated social interactions and eventually relationships of the individuals they connect. We focus especially on connecting friends and family rather than on systems used in the context of collaborative work. Readers interested in this latter kind of applications are referred to the design frameworks by Ginelle and Gutwin (2005) and Gutwin and Greenberg (2002). Below, we outline the relevant design space and the corresponding challenges for the design of awareness systems. The challenges pertain to social aspects of interaction design rather than the technological challenges relating to such systems. As such, they are inspired by Jonathan Grudin’s exposition of design challenges for the domain of groupware applications (Grudin, 1994).

  4. Developing General Cultural Awareness in a Monocultural English as a Foreign Language Context in a Mexican University: A Wiki-Based Critical Incident Approach

    ERIC Educational Resources Information Center

    Trejo Vences, Paola; Fay, Richard

    2015-01-01

    This article explores what the "intercultural turn" might mean in the case of teaching English to speakers of other languages (TESOL). The discussion is contextualised in what has been termed the "expanding circle" of English and focuses on an English as a foreign language (EFL) class in a Mexican university, a context where…

  5. Modular Context Processing and Provisioning - Prototype Experiences

    Microsoft Academic Search

    Michael Knappmeyer; Saad Liaquat Kiani; Nigel Baker; Ralf Tonjes

    2010-01-01

    \\u000a Ubiquitous Systems as envisaged by Mark Weiser are becoming a reality due to recent developments in mobile computing, sensing and wireless connectivity. Numerous context-aware applications and services have been proposed in different domains. Simultaneously, various concepts and models have been introduced as far as management and representation of contextual information are concerned. This paper presents the efforts towards a prototype

  6. Enabling Cross-Technology Mobile Applications with Network-Aware References

    Microsoft Academic Search

    Kevin Pinte; Dries Harnie; Theo D’Hondt

    \\u000a Mobile devices, such as smart phones, have become ubiquitous. This evolution has given rise to a vast ecosystem of mobile\\u000a applications. Typically these applications only use a small subset of the networking technologies at their disposal. Building\\u000a applications that use multiple networking technologies simultaneously or exploit knowledge about the available connections\\u000a is a laborious task. Programmers must manually keep track

  7. mrsFAST-Ultra: a compact, SNP-aware mapper for high performance sequencing applications.

    PubMed

    Hach, Faraz; Sarrafi, Iman; Hormozdiari, Farhad; Alkan, Can; Eichler, Evan E; Sahinalp, S Cenk

    2014-07-01

    High throughput sequencing (HTS) platforms generate unprecedented amounts of data that introduce challenges for processing and downstream analysis. While tools that report the 'best' mapping location of each read provide a fast way to process HTS data, they are not suitable for many types of downstream analysis such as structural variation detection, where it is important to report multiple mapping loci for each read. For this purpose we introduce mrsFAST-Ultra, a fast, cache oblivious, SNP-aware aligner that can handle the multi-mapping of HTS reads very efficiently. mrsFAST-Ultra improves mrsFAST, our first cache oblivious read aligner capable of handling multi-mapping reads, through new and compact index structures that reduce not only the overall memory usage but also the number of CPU operations per alignment. In fact the size of the index generated by mrsFAST-Ultra is 10 times smaller than that of mrsFAST. As importantly, mrsFAST-Ultra introduces new features such as being able to (i) obtain the best mapping loci for each read, and (ii) return all reads that have at most n mapping loci (within an error threshold), together with these loci, for any user specified n. Furthermore, mrsFAST-Ultra is SNP-aware, i.e. it can map reads to reference genome while discounting the mismatches that occur at common SNP locations provided by db-SNP; this significantly increases the number of reads that can be mapped to the reference genome. Notice that all of the above features are implemented within the index structure and are not simple post-processing steps and thus are performed highly efficiently. Finally, mrsFAST-Ultra utilizes multiple available cores and processors and can be tuned for various memory settings. Our results show that mrsFAST-Ultra is roughly five times faster than its predecessor mrsFAST. In comparison to newly enhanced popular tools such as Bowtie2, it is more sensitive (it can report 10 times or more mappings per read) and much faster (six times or more) in the multi-mapping mode. Furthermore, mrsFAST-Ultra has an index size of 2GB for the entire human reference genome, which is roughly half of that of Bowtie2. mrsFAST-Ultra is open source and it can be accessed at http://mrsfast.sourceforge.net. PMID:24810850

  8. Usage and awareness of the online Texas Common Application by students in the College of Agriculture and Life Sciences at Texas A&M University 

    E-print Network

    Dousay, Tonia Anne

    2000-01-01

    Application (TCA). With the onset of this new and improved process, there has been little to no research to analyze the progress. The purpose of this study was to evaluate usage and awareness of the online TCA at Texas A&M University within the College...

  9. PAL: P ropagation-aware A nomaly L ocalization for cloud hosted distributed applications

    Microsoft Academic Search

    Hiep Nguyen; Yongmin Tan; Xiaohui Gu

    2011-01-01

    Distributed applications running inside cloud are prone to performance anomalies due to various reasons such as insufficient resource allocations, unexpected workload increases, or software bugs. However, those applications often consist of multiple interacting components where one component anomaly may cause its dependent components to exhibit anomalous behavior as well. It is challenging to identify the faulty components among numerous distributed

  10. ASH: Application-aware SWANS with Highway Khaled Ibrahim and Michele C. Weigle

    E-print Network

    Weigle, Michele

    --Most VANET simulators do not allow for feedback between the vehicle mobility model and the network simulator to the scalable SWANS simulator will allow for realistic VANET simulations of important safety and traffic information applications. I. INTRODUCTION The simulation of Vehicular Ad-hoc Network (VANET) applications

  11. Spatially aware expectation maximization (SpAEM): application to prostate TRUS segmentation

    NASA Astrophysics Data System (ADS)

    Orooji, Mahdi; Sparks, Rachel; Bloch, B. Nicolas; Feleppa, Ernest; Barratt, Dean; Madabhushi, Anant

    2014-03-01

    In this paper we introduce Spatially Aware Expectation Maximization (SpAEM), a new parameter estimation method which incorporates information pertaining to spatial prior probability into the traditional expectation- maximization framework. For estimating the parameters of a given class, the spatial prior probability allows us to weight the contribution of any pixel based on the probability of that pixel belonging to the class of interest. In this paper we evaluate SpAEM for the problem of prostate capsule segmentation in transrectal ultrasound (TRUS) images. In cohort of 6 patients, SpAEM qualitatively and quantitatively outperforms traditional EM in distinguishing the foreground (prostate) from background (non-prostate) regions by around 45% in terms of the Sorensen Dice overlap measure, when compared against expert annotations. The variance of the estimated parameters measured via Cramer-Rao Lower Bound suggests that SpAEM yields unbiased estimates. Finally, on a synthetic TRUS image, the Cramer-Von Mises (CVM) criteria shows that SpAEM improves the estimation accuracy by around 51% and 88% for prostate and background, respectively, as compared to traditional EM.

  12. Application-aware resource control in support of network-level QOS 

    E-print Network

    Zhu, Ye

    2002-01-01

    applications with similar characteristics is classified into the same class. We adopted the RED queue management mechanism to adaptively control the traffic belonging to the same class. To achieve the optimal utility, the traffic belonging to different classes...

  13. A widget library for creating policy-aware semantic Web applications

    E-print Network

    Hollenbach, James Dylan

    2010-01-01

    In order to truly reap the benefits of the Semantic Web, there must be adequate tools for writing Web applications that aggregate, view, and edit the widely varying data the Semantic Web makes available. As a step toward ...

  14. 78 FR 4838 - Applications for New Awards; Gaining Early Awareness and Readiness for Undergraduate Programs...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-23

    ...characters per inch). Use one of the following fonts: Times New Roman, Courier, Courier New, or Arial. An application submitted in any other font (including Times Roman and Arial Narrow) will not be accepted. The page limits do...

  15. An Architecture and a Programming Interface for Application-Aware Data Dissemination Using Overlay Networks

    Microsoft Academic Search

    Tarun Banka; Panho Lee; Anura P. Jayasumana; Jim Kurose

    2007-01-01

    Many real-time distributed collaborative applicatio ns are emerging that require exchange of critical sensor d ata among geographically distant end users under resource-con strained network conditions. The QoS requirements, e.g., required ba ndwidth, latency, acceptable data quality, and reliability are interd ependent, and critical to the operation of these applications. Th is paper presents an AWON ( Application-aWare Overlay Networks)

  16. Privacy-aware identity management for client-side mashup applications

    Microsoft Academic Search

    Saman Zarandioon; Danfeng Yao; Vinod Ganapathy

    2009-01-01

    This paper concerns the problem of identity management in mod- ern Web-2.0-based mashup applications. Identity management sup- ports convenient access to information when mashups are used in sensitive environments, such an banking, investment and online shopping, by providing services such as single sign-on. We present Web2ID, a new identity management protocol tai- lored for mashup applications. Web2ID leverages a secure

  17. A SURVEY OF UPPER ONTOLOGIES FOR SITUATION AWARENESS Norbert Baumgartner

    E-print Network

    Hochreiter, Sepp

    A SURVEY OF UPPER ONTOLOGIES FOR SITUATION AWARENESS Norbert Baumgartner team Communication Linz, Austria email: werner@ifs.uni-linz.ac.at ABSTRACT Situation awareness enables an intelligent, situation awareness, context awareness 1 Introduction With advances in the field of sensor technology, also

  18. Awareness of and Attitudes towards Heat Waves within the Context of Climate Change among a Cohort of Residents in Adelaide, Australia

    PubMed Central

    Akompab, Derick A.; Bi, Peng; Williams, Susan; Grant, Janet; Walker, Iain A.; Augoustinos, Martha

    2012-01-01

    Heat waves are a public health concern in Australia and unprecedented heat waves have been recorded in Adelaide over recent years. The aim of this study was to examine the perception and attitudes towards heat waves in the context of climate change among a group of residents in Adelaide, an Australian city with a temperate climate. A cross-sectional study was conducted in the summer of 2012 among a sample of 267 residents. The results of the survey found that television (89.9%), radio (71.2%), newspapers (45.3%) were the main sources from which respondents received information about heat waves. The majority of the respondents (73.0%) followed news about heat waves very or somewhat closely. About 26.6% of the respondents were extremely or very concerned about the effects of heat waves on them personally. The main issues that were of personal concern for respondents during a heat wave were their personal comfort (60.7%), their garden (48.7%), and sleeping well (47.6%). Overall, respondents were more concerned about the impacts of heat waves to the society than on themselves. There was a significant association between gender (?² = 21.2, df = 3, p = 0.000), gross annual household income (p = 0.03) and concern for the societal effects of heat waves. Less than half (43.2%) of the respondents believed that heat waves will extremely or very likely increase in Adelaide according to climate projections. Nearly half (49.3%) believed that the effects of heat waves were already being felt in Adelaide. These findings may inform the reframing and communication strategies for heat waves in Adelaide in the context of climate change. PMID:23343978

  19. Workload-Aware Histograms for Remote Applications Tanu Malik and Randal Burns

    E-print Network

    Burns, Randal

    of these applications. We are interested in the performance of Bypass Yield (BY) cache, a proxy caching framework replica maintenance [1], proxy caching [2], and query schedulers in federated systems [3]. Accurate esti pulling data in replica systems, caching versus evicting objects in proxy caches, choosing a distributed

  20. Content-aware H.264 encoding for traffic video tracking applications

    Microsoft Academic Search

    Eren Soyak; Sotirios A. Tsaftaris; Aggelos K. Katsaggelos

    2010-01-01

    The compression of video can reduce the accuracy of tracking algorithms, which is problematic for centralized applications that rely on remotely captured and compressed video for input. We show the effects of high compression on the features commonly used in real-time video object tracking. We propose a computationally efficient Region of Interest (ROI) extraction method, which is used during standard-compliant

  1. Optimal Resource-Aware Deployment Planning for Component-Based Distributed Applications

    Microsoft Academic Search

    Tatiana Kichkaylo; Vijay Karamcheti

    2004-01-01

    Component-based approaches are becoming increas- ingly popular in the areas of adaptive distributed systems, web services, and grid computing. In each case, the under- lying infrastructure needs to address a deployment prob- lem involving the placement of application components onto computational, data, and network resources across a wide-area environment subject to a variety of qualita- tive and quantitative constraints. In

  2. Energy-efficient application-aware online provisioning for virtualized clouds and data centers

    Microsoft Academic Search

    I. Rodero; J. Jaramillo; A. Quiroz; M. Parashar; F. Guim; S. Poole

    2010-01-01

    As energy efficiency and associated costs become key concerns, consolidated and virtualized data centers and clouds are attractive computing platforms for data- and compute- intensive applications. These platforms provide an abstraction of nearly-unlimited computing resources through the elastic use of pools of consolidated resources, and provide opportunities for higher utilization and energy savings. Recently, these platforms are also being considered

  3. Modeling a Probabilistic Ontology for Maritime Domain Awareness

    E-print Network

    Laskey, Kathryn Blackmond

    Modeling a Probabilistic Ontology for Maritime Domain Awareness Rommel N. Carvalho, Richard ontology for a Maritime Domain Awareness application. The ontology was created to support identification situational awareness, web services, Bayesian networks, MEBN, PR-OWL. I. INTRODUCTION Maritime Domain

  4. A distance-aware scheduler for real-time applications in 802.16 Wimax networks

    Microsoft Academic Search

    Melek Oktay; Haci Ali Mantar

    2009-01-01

    Earliest deadline first (EDF) is a delay-optimal scheduling discipline commonly used in real-time applications in wired and wireless networks. Traditional schedulers like EDF do not take the packet destination distance into account. In this paper, we present a scheme that differentiates real-time packets according to their destination distance and assigns them to the dedicated queues which are long distance, middle

  5. Temperature Control Framework Using Wireless Sensor Networks and Geostatistical Analysis for Total Spatial Awareness

    E-print Network

    Fan, Jeffrey

    Spatial Awareness Charles Castello and Jeffrey Fan Department of ECE Florida International University Networks (WSN) and geostatistical analysis for total spatial awareness. Sampled temperature readings from Home; Intelligent Temperature Control; Wireless Sensor Network; WSN; Context Awareness; Geostatistical

  6. Case-based situation awareness

    Microsoft Academic Search

    Nuka Nwiabu; Ian Allison; Patrik Holt; Peter Lowit; Babs Oyeneyin

    2012-01-01

    Situation-aware case-based decision support (SACBDS) systems comprise two distinct parts: situation awareness (SA) and case-based reasoning (CBR). The SA part keeps a finite history of the time space information of the domain and uses rules to interpret cues from the environment with respect to an individual user's context, and then anticipates future situations by performing statistical inference over historical data.

  7. Context-dependent player's movement interpretation: application to adaptive game development

    NASA Astrophysics Data System (ADS)

    Picard, Francois; Estraillier, Pascal

    2010-02-01

    Video games are more and more controlled by the real movements of the player. However, the player is constrained by the system devices, imposing a limited vocabulary of actions associated with a set of unnatural movements. To introduce more entertaining video games to players, a component-based architecture is proposed. It has been acknowledged as the starting point for the development of adaptive applications based on the hypothesis of a high level dialogue between the system and the player. The system adaptability relies on interpretation mechanisms of the player behaviors. These behaviors are defined through the representation of the real movements of the player who freely interacts with the 3D elements composing an immersive virtual environment, following a given game scenario. The efficient interpretation of the player movements relies on the introduction in the system of the management of the scene's context. The contextual information not only helps to determine the true meaning of an observed behavior but also makes the system to adapt its processes regarding this interpretation, while managing its hardware and software resources efficiently. A commercial motion capture interface has been enhanced by the elaboration of such a system.

  8. From Ambient Sensing to IoT-based Context Computing: An Open Framework for End to End QoC Management †

    PubMed Central

    Marie, Pierrick; Desprats, Thierry; Chabridon, Sophie; Sibilla, Michelle; Taconet, Chantal

    2015-01-01

    Quality of Context (QoC) awareness is recognized as a key point for the success of context-aware computing. At the time where the combination of the Internet of Things, Cloud Computing, and Ambient Intelligence paradigms offer together new opportunities for managing richer context data, the next generation of Distributed Context Managers (DCM) is facing new challenges concerning QoC management. This paper presents our model-driven QoCIM framework. QoCIM is the acronym for Quality of Context Information Model. We show how it can help application developers to manage the whole QoC life-cycle by providing genericity, openness and uniformity. Its usages are illustrated, both at design time and at runtime, in the case of an urban pollution context- and QoC-aware scenario. PMID:26087372

  9. From Ambient Sensing to IoT-based Context Computing: An Open Framework for End to End QoC Management.

    PubMed

    Marie, Pierrick; Desprats, Thierry; Chabridon, Sophie; Sibilla, Michelle; Taconet, Chantal

    2015-01-01

    Quality of Context (QoC) awareness is recognized as a key point for the success of context-aware computing. At the time where the combination of the Internet of Things, Cloud Computing, and Ambient Intelligence paradigms offer together new opportunities for managing richer context data, the next generation of Distributed Context Managers (DCM) is facing new challenges concerning QoC management. This paper presents our model-driven QoCIM framework. QoCIM is the acronym for Quality of Context Information Model. We show how it can help application developers to manage the whole QoC life-cycle by providing genericity, openness and uniformity. Its usages are illustrated, both at design time and at runtime, in the case of an urban pollution context- and QoC-aware scenario. PMID:26087372

  10. Large Context Problems and Their Applications to Education: Some Contemporary Examples

    ERIC Educational Resources Information Center

    Winchester, Ian

    2006-01-01

    Some 35 years ago, Gerard K. O'Neill used the large context of space travel with his undergraduate physics students. A Canadian physics teacher, Art Stinner, independently arrived at a similar notion in a more limited but, therefore, more generally useful sense, which he referred to as the "large context problem" approach. At a slightly earlier…

  11. Generalized rough set under formal context and its application in expert system

    Microsoft Academic Search

    Yuming Zhai; Haifeng Liu

    2010-01-01

    Rough set theory and the theory of concept lattices are two efficient tools for knowledge discovery. Since an information system, the data description of rough set theory, and a formal context, the data description of concept lattice theory, can be taken as the other one. In this paper, generalized rough set model under formal context is discussed. Firstly, generalized lower

  12. Context intra-coding scheme for securing surveillance videos and its applications

    Microsoft Academic Search

    Yi-Chong Zeng; Chiou-Ting Hsu

    2011-01-01

    Aiming at both compression and content protection, we propose a context intra-coding scheme for securing surveillance videos. We also develop methods to detect moving objects, skin color and human face in compression domain. In the proposed context intra-coding scheme, every DCT block is identified as either a parent block or a child block. The child block is then represented in

  13. Social Awareness Concepts to Support Social Computing

    E-print Network

    Loke, Seng W. - Loke, Seng W.

    Social Awareness Concepts to Support Social Computing Andry Rakotonirainy Centre for Accident:p.obst@qut.edu.au Abstract--Our social life is characterised by norms that man- ifest as attitudinal and behavioural uniformities among people. With greater awareness about our social context, we can interact more efficiently

  14. Situation awareness in emergency medical dispatch

    Microsoft Academic Search

    Ann Blandford; B. L. William Wong

    2004-01-01

    Situation Awareness, and how systems can be designed to support it appropriately, have been a focus of study in dynamic, safety critical contexts such as aviation. The work reported here extends the study of situation awareness into the domain of Emergency Medical Dispatch (EMD). The study was conducted in one of the largest ambulance services in the world. In this

  15. A Summary of Students' Mental Models and Their Applications in Contexts Pertaining to Newton's II Law

    NSDL National Science Digital Library

    Itza-Ortiz, Salomon F.

    In this study, presented at the 2002 Physics Education Research Conference, authors describe their investigation of students' use of Newton's II law in mechanics and electricity and magnetism contexts. They interviewed 16 students in a two-semester calculus-based physics course and found students' answers are consistent with two principal mental models and a combination of these two. The authors also explore whether the students who use Newton's Second Law in mechanics contexts continue to do so in electricity and magnetism.

  16. Human Computer Interaction with a PIM Application: Merging Activity, Location and Social Setting into Context

    Microsoft Academic Search

    Tor-morten Grønli; Gheorghita Ghinea

    2009-01-01

    Personal Information Managers exploit the ubiquitous paradigm in mobile computing technology to integrate services and programs\\u000a for business and leisure. Recognizing that every situation is constituted by information and events, this context will vary\\u000a depending on the situation users are in, and the tasks they are about to commit. The value of context as a source of information\\u000a is highly

  17. Auditory awareness

    Microsoft Academic Search

    Henry E Heffner

    1998-01-01

    This paper reviews seven lines of auditory research which bear upon the issue of awareness in animals. First, comparative studies of auditory sensitivity have found important differences in the hearing abilities of animals such that sounds easily audible to one species may be inaudible to others. Second, studies of auditory attention indicate that when an animal is presented with a

  18. Context-Aware Online Commercial Intention Detection

    E-print Network

    Yang, Qiang

    dozens of meanings, which can either mean an animal or a kind of luxury cars, or others1 . The third if "jaguar" takes the meaning of being a kind of luxury car, it either encodes a commercial intention (when the user wants to buy a car), or non-commercial intention (where the user just wants to find some luxury

  19. Context-Aware Wrapping: Synchronized Data Extraction

    Microsoft Academic Search

    Shui-lung Chuang; Kevin Chen-chuan Chang; Chengxiang Zhai

    2007-01-01

    The deep Web presents a pressing need for integrating large numbers of dynamically evolving data sources. To be more automatic yet accurate in building an integration system, we observe two problems: First, across sequential tasks in integration, how can a wrapper (as an extraction task) con- sider the peer sources to facilitate the subsequent matching task? Second, across parallel sources,

  20. Using Simplified Regulated Breathing with an Adolescent StuttererApplication of Effective Intervention in a Residential Context

    Microsoft Academic Search

    Kurt A. Freeman; Patrick C. Friman

    2004-01-01

    Simplified regulated breathing (SRB) has been demonstrated to reduce or eliminate stuttering in children. However, much of the current research has evaluated the intervention with school-aged children within educational contexts. In the current case report, we extended the application of SRB by evaluating its effectiveness in treating stuttering displayed by a 15-year-old resident of a large midwestern residential facility. Further,

  1. Explanation-aware computing of the prognosis for breast cancer supported by I K-DCBRC: Technical innovation

    Microsoft Academic Search

    Abdeldjalil Khelassi

    2014-01-01

    Background:Active research is being conducted to determine the prognosis for breast cancer. However, the uncertainty is a major obstacle in this domain of medical research. In that context, explanation -aware computing has the potential for providing meaningful interactions between complex medical applications and users, which would ensure a significant reducti on of uncertainty and risks. This paper presents an explanation

  2. A comparison of near surface CO2 monitoring methods and their applicability in the CCS context

    NASA Astrophysics Data System (ADS)

    Möller, Ingo; Schlömer, Stefan

    2014-05-01

    The detection, characterization and quantification of different gas species in the vicinity of the soil-atmosphere interface is considered as one key element of near surface monitoring related to CO2 storage operations. From a broad range of available techniques (see e.g. Korre et al. 2011 and Rütters et al. 2013), three different methods have initially been selected in order to compare their applicability in the CCS context: - The eddy covariance method which can compute CO2 fluxes within the atmospheric boundary layer, - CO2 flux measurements between soil and atmosphere by means of accumulation chambers, - Permanent CO2 concentration measurements in the vadose zone of the soil column. Additionally, basic atmospheric CO2 concentration measurements were also included in this comparison since they might have a potential as monitoring alternative on a low-cost basis. Results and lessons learned from practical field experiments were elaborated to point out advantages and disadvantages of the individual methods as well as their integration into an overall monitoring concept of CO2 storage sites. Field work has been carried out in different locations of Northern Germany, amongst others in the Altmark region, a formerly proposed CO2 injection site for enhanced gas recovery (Schlömer et al. 2014). This study benefits from interim results of the MONACO project (Monitoring approach for geological CO2 storage sites using an hierarchic observation concept) which is funded by the German Federal Ministry of Education and Research (BMBF, grant 03G0817A). References: Korre, A., Imrie, C.E., May, F., Beaubien, S.E., Vandermeijer, V., Persoglia, S., Golmen, L., Fabriol, H., Dixon, T., 2011. Quantification techniques for potential CO2 leakage from geological storage sites. Energy Proc. 4, pp. 3413-3420. Rütters, H., Möller, I., May, F., Flornes, K., Hladik, V., Arvanitis, A., Gülec, N.,Bakiler, C., Dudu, A., Kucharic, L., Juhojuntti, N., Shogenova, A., Georgiev, G., 2013. State-of-the-art of monitoring methods to evaluate storage site performance. CGS Europe Report D3.3. 109 pp. http://repository.cgseurope.net/eng/cgseurope/knowledge-repository/key-reports/Monitoring.aspx Schlömer, S., Möller, I., Furche, M., 2014. Baseline soil gas measurements as part of a monitoring concept above a projected CO2 injection formation - A case study from Northern Germany. Int. J. Greenhouse Gas Control, Vol. 20, p. 57-72. http://dx.doi.org/10.1016/j.ijggc.2013.10.028.

  3. Context in selection of men and women in hiring decisions: gender composition of the applicant pool.

    PubMed

    van Ommeren, Jos; de Vries, Reinout E; Russo, Giovanni; van Ommeren, Mark

    2005-04-01

    The hypothesis that the sex composition of an applicant pool affects the hiring probabilities of individual job applicants was tested using gender-distinctive information on accepted and rejected job applicants in The Netherlands. The evidence supports this hypothesis, although the effect sizes are moderate. Both men and women have a lower probability of being hired when the applicant pool contains fewer applicants from their own sex. PMID:15941109

  4. Traffic-engineering-aware shortest-path routing and its application in IP-over-WDM networks [Invited

    NASA Astrophysics Data System (ADS)

    Lee, Youngseok; Mukherjee, Biswanath

    2004-03-01

    Single shortest-path routing is known to perform poorly for Internet traffic engineering (TE) where the typical optimization objective is to minimize the maximum link load. Splitting traffic uniformly over equal-cost multiple shortest paths in open shortest path first and intermediate system-intermediate system protocols does not always minimize the maximum link load when multiple paths are not carefully selected for the global traffic demand matrix. However, a TE-aware shortest path among all the equal-cost multiple shortest paths between each ingress-egress pair can be selected such that the maximum link load is significantly reduced. IP routers can use the globally optimal TE-aware shortest path without any change to existing routing protocols and without any serious configuration overhead. While calculating TE-aware shortest paths, the destination-based forwarding constraint at a node should be satisfied, because an IP router will forward a packet to the next hop toward the destination by looking up the destination prefix. We present a mathematical problem formulation for finding a set of TE-aware shortest paths for the given network as an integer linear program, and we propose a simple heuristic for solving large instances of the problem. Then we explore the usage of our proposed algorithm for the integrated TE method in IP-over-WDM networks. The proposed algorithm is evaluated through simulations in IP networks as well as in IP-over-WDM networks.

  5. Acoustic environment as an indicator of social and physical context

    Microsoft Academic Search

    Dan Smith; Ling Ma; Nick Ryan

    2006-01-01

    Acoustic environments provide many valuable cues for context-aware computing applications. From the acoustic environment we\\u000a can infer the types of activity, communication modes and other actors involved in the activity. Environmental or background\\u000a noise can be classified with a high degree of accuracy using recordings from microphones commonly found in PDAs and other\\u000a consumer devices. We describe an acoustic environment

  6. AWARE Foundation

    NSDL National Science Digital Library

    The mission of the Adolescent Wellness and Reproductive Education Foundation (AWARE) is "dedicated to educating and empowering adolescents to make responsible decisions regarding their wellness, sexuality and reproductive health." Additionally, the AWARE Foundation also is concerned with reaching out to parents as well, in order to keep them informed about various issues affecting teen health and sexuality. The site features an area where parents and young people can ask questions, which will be answered by a team of health care specialists. In addition, visitors can take part in live chat sessions about teen health, or simply read through transcripts of previous live chat sessions. The site also provides a Fast Facts list that details some brief, but important, facts about teen sexuality and reproductive health. Finally, the site also contains a number of emergency health resources, including Web sites and phone numbers of organizations that deal with eating disorders, sexual abuse, and mental health.

  7. Current Awareness

    NSDL National Science Digital Library

    Compiled monthly by the Education Information Center of the North Carolina Department of Public Instruction in association with The Landmark Project, Current Awareness is a bibliographic database of the most recent literature on issues related to education and technology. Garnered from an extensive journal collection, the citations in the database are indexed into more than 200 topic areas. Educators may browse the database by topic or conduct keyword searches on topic or title. Queries yield brief citations in a tabular format.

  8. Avalanche Awareness

    NSDL National Science Digital Library

    Laura Cheshire

    This guide on avalanche awareness and safety discusses the anatomy of an avalanche (starting zone, track, and runout zone), avalanche factors and conditions, determining if the snowpack is safe (using snowpits and shear tests), when and where avalanches happen, the typical victims, tips for survival, an avalanche danger scale, and a list of avalanche quick checks. Avalanche conditions discussed include weather, snowfall, temperature and wind direction, snowpack, slope angle, slope orientation, terrain, and vegetation.

  9. The Software EBox: Integrated Information for Situational Awareness

    E-print Network

    Venkatasubramanian, Nalini

    The Software EBox: Integrated Information for Situational Awareness Naveen Ashish, Jay Lickfett to providing situational awareness during emergency response situations. The EBox exemplifies a novel that is a software solution for information integration in the context of situational awareness systems for emergency

  10. Functional Grammar in the Context of Linguistic Applications in Turkish Language Teaching

    ERIC Educational Resources Information Center

    Epcacan, Cahit

    2013-01-01

    In the last century, language researches adopted the scientific method and linguistics became an autonomous discipline. Linguistics is a framework concept that analyzes all languages in the world in various contexts according to its own rules and draws conclusions using the systematic approach. Functional linguistics is a linguistic trend that…

  11. Refining estimates of catastrophic healthcare expenditure: an application in the Indian context.

    PubMed

    Gupta, Indrani; Joe, William

    2013-06-01

    Empirics of catastrophic healthcare expenditure, especially in the Indian context, are often based on consumption expenditure data that inadequately informs about the ability to pay. Use of such data can generate a pro-rich bias in the estimation of catastrophic expenditure thereby suggesting greater concentration of such expenditures among richer households. To improve upon the existing approach, this paper suggests a multidimensional approach to comprehend the incidence of catastrophic expenditure. Here, we integrate the information on health expenditure with other social and economic parameters of deprivation. An empirical illustration is provided by using nationally representative survey on morbidity and healthcare in India. The results of the multidimensional approach are consistent with the theoretical underpinnings of the ability-to-pay approach and emphasizes on the severity of the problem in rural areas. The suggested methodology is flexible and allows for context-specific prioritization in selection of parameters of vulnerability while estimating the incidence of catastrophic expenditures. PMID:23436186

  12. Tracking recurring contexts using ensemble classifiers: an application to email filtering

    Microsoft Academic Search

    Ioannis Katakis; Grigorios Tsoumakas; Ioannis P. Vlahavas

    2010-01-01

    Concept drift constitutes a challenging problem for the machine learning and data mining community that frequently appears\\u000a in real world stream classification problems. It is usually defined as the unforeseeable concept change of the target variable\\u000a in a prediction task. In this paper, we focus on the problem of recurring contexts, a special sub-type of concept drift, that has not

  13. Pharmacophore modeling methods in focused library selection - applications in the context of a new classification scheme.

    PubMed

    Luu, Tien T T; Malcolm, Noj; Nadassy, Katalin

    2011-07-01

    A pharmacophore is a model which represents the key physico-chemical interactions that mediate biological activity. There is a long history of using pharmacophore modeling methods to select subsets of compounds, focused towards a specific target of interest. This paper will review existing computational methods for deriving and comparing pharmacophore models. We outline a new classification of pharmacophore methods based on the abstraction of the underlying chemical interactions which embody a pharmacophore, and the methods available to quantitatively compare them. Within the context of this classification, example studies, using specific pharmacophore modeling methods for focused library selection, will be discussed. PMID:21521148

  14. Unmanned Vehicle Situation Awareness

    Microsoft Academic Search

    Julie A. Adams

    This paper presents the concept of unmanned vehicle situation awareness and provides a discussion of how unmanned vehicle situation awareness can be defined based upon human situation awareness. A broadly accepted human situation awareness definition is directly applied to the notion of unmanned vehicle situation awareness. The paper also discusses unique unmanned vehicle aspects that will influence unmanned vehicle situation

  15. Alginate drug delivery systems: application in context of pharmaceutical and biomedical research.

    PubMed

    Jain, Dharmendra; Bar-Shalom, Daniel

    2014-12-01

    Alginates are natural polymers widely used in the food industry because of their biocompatible, biodegradable character, nontoxicity and easy availability. The bioadhesive character of alginates makes them useful in the pharmaceutical industry as well. The application areas of sodium alginate-based drug delivery systems are many and these systems can be formulated as gels, matrices, membranes, nanospheres, microspheres, etc. Worldwide researchers are exploring possible applications of alginates as coating material, preparation of controlled-release drug delivery systems such as microspheres, beads, pellets, gels, fibers, membranes, etc. In the present review, such applications of alginates are discussed. PMID:25109399

  16. Ubiquitous location tracking for context-specific information delivery on construction sites

    E-print Network

    Kamat, Vineet R.

    to a particular context. Context awareness can also be used to improve security, logistics and health and safety access to information such as project plans, drawings, schedules, and budgets. Awareness of a user reality Construction Context awareness Information delivery Location tracking 1. Introduction

  17. Situation Awareness and Levels of Automation

    NASA Technical Reports Server (NTRS)

    Kaber, David B.

    1999-01-01

    During the first year of this project, a taxonomy of theoretical levels of automation (LOAs) was applied to the advanced commercial aircraft by categorizing actual modes of McDonald Douglas MD-11 autoflight system operation in terms of the taxonomy. As well, high LOAs included in the taxonomy (e.g., supervisory control) were modeled in the context of MD-11 autoflight systems through development of a virtual flight simulator. The flight simulator was an integration of a re-configurable simulator developed by the Georgia Institute Technology and new software prototypes of autoflight system modules found in the MD-11 cockpit. In addition to this work, a version of the Situation Awareness Global Assessment Technique (SAGAT) was developed for application to commercial piloting tasks. A software package was developed to deliver the SAGAT and was integrated with the virtual flight simulator.

  18. Advanced Weather Awareness and Reporting Enhancements

    NASA Technical Reports Server (NTRS)

    Busquets, Anthony M. (Technical Monitor); Ruokangas, Corinne Clinton; Kelly, Wallace E., III

    2005-01-01

    AWARE (Aviation Weather Awareness and Reporting Enhancements) was a NASA Cooperative Research and Development program conducted jointly by Rockwell Scientific, Rockwell Collins, and NASA. The effort culminated in an enhanced weather briefing and reporting tool prototype designed to integrate graphical and text-based aviation weather data to provide clear situational awareness in the context of a specific pilot, flight and equipment profile. The initial implementation of AWARE was as a web-based preflight planning tool, specifically for general aviation pilots, who do not have access to support such as the dispatchers available for commercial airlines. Initial usability tests showed that for VFR (Visual Flight Rules) pilots, AWARE provided faster and more effective weather evaluation. In a subsequent formal usability test for IFR (Instrument Flight Rules) pilots, all users finished the AWARE tests faster than the parallel DUAT tests, and all subjects graded AWARE higher for effectiveness, efficiency, and usability. The decision analysis basis of AWARE differentiates it from other aviation safety programs, providing analysis of context-sensitive data in a personalized graphical format to aid pilots/dispatchers in their complex flight requirements.

  19. Target Awareness: Lupus

    MedlinePLUS

    ... Target Awareness: Lupus Jan. 15, 2009 Target Awareness: Lupus Target Awareness: Lupus provides a brief overview of ... Email Print Tags for this Story treatments symptoms Lupus FAQ What is lupus? What are the common ...

  20. 34 CFR 303.164 - Public awareness program.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Public awareness program. 303.164 Section 303...System-Application Requirements § 303.164 Public awareness program. Each application must...that the State has established a public awareness program that meets the requirements...

  1. 34 CFR 303.164 - Public awareness program.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 2010-07-01 true Public awareness program. 303.164 Section 303...System-Application Requirements § 303.164 Public awareness program. Each application must...that the State has established a public awareness program that meets the requirements...

  2. Experiences Using Adaptive Middleware in Distributed Real-time Embedded Application Contexts: a Dependability Perspective

    E-print Network

    Schmidt, Douglas C.

    , Weapons Systems Open Architecture (WSOA) and Unmanned Aerial Vehicles (UAV), which have already undergone Schantz BBN Technologies, Cambridge Douglas C. Schmidt University of California, Irvine Abstract Over the past few years we have developed a number of real world applications that have both motivated and used

  3. Context-derived Pseudonyms for Protection of Privacy in Transport Middleware and Applications

    E-print Network

    Cambridge, University of

    Telecommunications plc. Adastral Park Martlesham Heath, United Kingdom. IP5 3RE {Trevor.Burbridge,Andrea.2.Soppera this model to allow applications to serve their users in an automatic or semi-automatic way. For example argued that anonymisation rather than access control is the appropriate mechanism to achieve privacy

  4. Is Recess an Achievement Context? An Application of Expectancy-Value Theory to Playground Choices

    ERIC Educational Resources Information Center

    Spencer-Cavaliere, Nancy; Dunn, Janice Causgrove; Watkinson, E. Jane

    2009-01-01

    This study investigated the application of an expectancy-value model to children's activity choices on the playground at recess. The purpose was to test the prediction that expectancies for success and subjective task values are related to decisions to engage in specific recess activities such as climbing, playing soccer, or skipping rope.…

  5. Smartphone usage in the wild: a large-scale analysis of applications and context

    E-print Network

    Gatica-Perez, Daniel

    automatically reveals key patterns of phone application us- age that would traditionally be obtained through manual logging or questionnaire. Our findings contribute to the large-scale under- standing Terms Human Factors 1. INTRODUCTION The short history of mobile phones has witnessed several stages

  6. 46 CFR 12.627 - Requirements to qualify for an STCW endorsement for security awareness.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...qualify for an STCW endorsement for security awareness. 12.627 Section 12.627 Shipping...qualify for an STCW endorsement for security awareness. (a) An applicant for an endorsement for security awareness must— (1) Present...

  7. Bag Context Tree Grammars # Sigrid Ewert

    E-print Network

    Drewes, Frank

    or string, but evolves on its own during a derivation. Motivation for investigating bag context tree an investigation into random context in tree gram­ mars and tree transducers. A random context tree grammar G, of course, is that in developing a path of a tree, one has to be aware of the whole of the evolving tree

  8. Study of Agency Work Contexts: Program Application Reports, National Study of Social Welfare and Rehabilitation Workers, Work and Organization Contexts. Professional Paper No. 18-74.

    ERIC Educational Resources Information Center

    Olmstead, Joseph A.; Christensen, Harold E.

    This report summarizes selected results and implications of an intensive field study of the effects of work contexts on the attitudes and performance of personnel employed in social welfare and rehabilitation agencies. A principal objective of this research was to determine the impacts of organizational structure and climate on social welfare and…

  9. Representation of DNA sequences in genetic codon context with applications in exon and intron prediction.

    PubMed

    Yin, Changchuan

    2015-04-01

    To apply digital signal processing (DSP) methods to analyze DNA sequences, the sequences first must be specially mapped into numerical sequences. Thus, effective numerical mappings of DNA sequences play key roles in the effectiveness of DSP-based methods such as exon prediction. Despite numerous mappings of symbolic DNA sequences to numerical series, the existing mapping methods do not include the genetic coding features of DNA sequences. We present a novel numerical representation of DNA sequences using genetic codon context (GCC) in which the numerical values are optimized by simulation annealing to maximize the 3-periodicity signal to noise ratio (SNR). The optimized GCC representation is then applied in exon and intron prediction by Short-Time Fourier Transform (STFT) approach. The results show the GCC method enhances the SNR values of exon sequences and thus increases the accuracy of predicting protein coding regions in genomes compared with the commonly used 4D binary representation. In addition, this study offers a novel way to reveal specific features of DNA sequences by optimizing numerical mappings of symbolic DNA sequences. PMID:25491390

  10. Importance of context in adoption and progress in application of strategic environmental assessment: Experience of Thailand

    SciTech Connect

    Wirutskulshai, Uma, E-mail: st104686@ait.ac.th; Sajor, Edsel, E-mail: esajor@ait.ac.th; Coowanitwong, Nowarat

    2011-04-15

    Following the example of other developed countries, strategic environmental assessment (SEA) tool is now being introduced in developing countries, with the expectations, among others, that it will influence decision-making process in planning, and also usher in the participatory and collaborative planning towards a more sustainable track in development. This article examines Thailand's own recent introduction of SEA. The authors underscore the particularity of the Thai planning context as well as the broader governance structure and processes in the country as the critical factor influencing the extent, substance and form of adoption of SEA. Top-down tradition of planning and serious limitation of public participation opportunity structures and institutional culture have minimized the tool's positive impact and influence in development planning. Thailand's experience in SEA introduction thus reaffirms the important lesson from a number of other developing countries: that legal framework for SEA is necessary and critical especially in its initial adoption; and, that public participation needs to be supported too and institutionalized for the tool to fulfill its promise of improving environmental governance and optimizing potentials of development projects vis-a-vis various social and environmental concerns.

  11. Biological time series analysis using a context free language: applicability to pulsatile hormone data.

    PubMed

    Dean, Dennis A; Adler, Gail K; Nguyen, David P; Klerman, Elizabeth B

    2014-01-01

    We present a novel approach for analyzing biological time-series data using a context-free language (CFL) representation that allows the extraction and quantification of important features from the time-series. This representation results in Hierarchically AdaPtive (HAP) analysis, a suite of multiple complementary techniques that enable rapid analysis of data and does not require the user to set parameters. HAP analysis generates hierarchically organized parameter distributions that allow multi-scale components of the time-series to be quantified and includes a data analysis pipeline that applies recursive analyses to generate hierarchically organized results that extend traditional outcome measures such as pharmacokinetics and inter-pulse interval. Pulsicons, a novel text-based time-series representation also derived from the CFL approach, are introduced as an objective qualitative comparison nomenclature. We apply HAP to the analysis of 24 hours of frequently sampled pulsatile cortisol hormone data, which has known analysis challenges, from 14 healthy women. HAP analysis generated results in seconds and produced dozens of figures for each participant. The results quantify the observed qualitative features of cortisol data as a series of pulse clusters, each consisting of one or more embedded pulses, and identify two ultradian phenotypes in this dataset. HAP analysis is designed to be robust to individual differences and to missing data and may be applied to other pulsatile hormones. Future work can extend HAP analysis to other time-series data types, including oscillatory and other periodic physiological signals. PMID:25184442

  12. CoCo: Dynamic Composition of Context Information

    Microsoft Academic Search

    Thomas Buchholz; Michael Krause; Claudia Linnhoff-popien; Michael Schiffers

    2004-01-01

    Services need to adapt themselves to their computing environment and the situation of the user to be context-aware services (CASs). For their adaptation, they are in need of specific context information, that often has to be derived from other pieces of low-level context information. The process of retrieving context information is highly dynamic since appropriate context sources are often unknown

  13. Real time emotion aware applications: a case study employing emotion evocative pictures and neuro-physiological sensing enhanced by Graphic Processor Units.

    PubMed

    Konstantinidis, Evdokimos I; Frantzidis, Christos A; Pappas, Costas; Bamidis, Panagiotis D

    2012-07-01

    In this paper the feasibility of adopting Graphic Processor Units towards real-time emotion aware computing is investigated for boosting the time consuming computations employed in such applications. The proposed methodology was employed in analysis of encephalographic and electrodermal data gathered when participants passively viewed emotional evocative stimuli. The GPU effectiveness when processing electroencephalographic and electrodermal recordings is demonstrated by comparing the execution time of chaos/complexity analysis through nonlinear dynamics (multi-channel correlation dimension/D2) and signal processing algorithms (computation of skin conductance level/SCL) into various popular programming environments. Apart from the beneficial role of parallel programming, the adoption of special design techniques regarding memory management may further enhance the time minimization which approximates a factor of 30 in comparison with ANSI C language (single-core sequential execution). Therefore, the use of GPU parallel capabilities offers a reliable and robust solution for real-time sensing the user's affective state. PMID:22520825

  14. Seven scenarios for context-aware systems Seven Scenarios for Context-aware Systems

    E-print Network

    Freytag, Johann-Christoph

    , and Ray LeVite starts his daily running training. Ray is a professional sprinter who competes mainly to the system. He can observe the values himself but is also acoustically notified if he exceeds any normal

  15. TFMAP: Optimizing MAP for Top-N Context-aware RecommendationContext aware Recommendation

    E-print Network

    Draw something 0 0.8 2 Fruit ninja 0 0.2 4 · AP(y,r) non smooth over model parameters · MAP: Mean AP? · Borrow techniques from learning to rank:· Borrow techniques from learning-to-rank: · Smoothed MAP

  16. Expansion of the Real-time Sport-land Information System for NOAA / National Weather Service Situational Awareness and Local Modeling Applications

    NASA Technical Reports Server (NTRS)

    Case, Jonathan L.; White, Kristopher D.

    2014-01-01

    The NASA Short-term Prediction Research and Transition (SPoRT) Center in Huntsville, AL (Jedlovec 2013; Ralph et al. 2013; Merceret et al. 2013) is running a real-time configuration of the Noah land surface model (LSM) within the NASA Land Information System (LIS) framework (hereafter referred to as the "SPoRT-LIS"). Output from the real-time SPoRT-LIS is used for (1) initializing land surface variables for local modeling applications, and (2) displaying in decision support systems for situational awareness and drought monitoring at select NOAA/National Weather Service (NWS) partner offices. The SPoRT-LIS is currently run over a domain covering the southeastern half of the Continental United States (CONUS), with an additional experimental real-time run over the entire CONUS and surrounding portions of southern Canada and northern Mexico. The experimental CONUS run incorporates hourly quantitative precipitation estimation (QPE) from the National Severe Storms Laboratory Multi- Radar Multi-Sensor (MRMS) product (Zhang et al. 2011, 2014), which will be transitioned into operations at the National Centers for Environmental Prediction (NCEP) in Fall 2014. This paper describes the current and experimental SPoRT-LIS configurations, and documents some of the limitations still remaining through the advent of MRMS precipitation analyses in the SPoRT-LIS land surface model (LSM) simulations. Section 2 gives background information on the NASA LIS and describes the realtime SPoRT-LIS configurations being compared. Section 3 presents recent work done to develop a training module on situational awareness applications of real-time SPoRT-LIS output. Comparisons between output from the two SPoRT-LIS runs are shown in Section 4, including a documentation of issues encountered in using the MRMS precipitation dataset. A summary and future work in given in Section 5, followed by acknowledgements and references.

  17. Application of carbon dioxide (CO{sub 2}) for controlling subsurface fire area: Indian context

    SciTech Connect

    Mohalik, N.K.; Singh, V.K.; Singh, R.V.K. [Central Institute of Mining & Fuel Research, Dhanbad (India)

    2009-07-15

    In bord and pillar method of mining, the panels are sealed off after depillaring. Depending upon the site specific condition, 40 to 45 % coal are left in depillared panel as stook, loose coal left in goaf, hard coal on floor and roof of the panel. The left out coals in goaf area start oxidation, and this leads to spontaneous heating in side sealed off area. For assessment of fire in underground coal mines, thermo-compositional monitoring plays an important role. This paper presents scientific relevance and selective criteria for use of inert gas for control of subsurface fire. Finally the paper discusses spontaneous heating problem in sealed off area and application of inertisation technology by using CO, to prevent and control sealed off fire at Haripur Colliery, Kenda Area, ECL, India.

  18. Is the NHS best practice tariff for type 1 diabetes applicable in the Irish context?

    PubMed

    O'Brien, N; McGlacken-Byrne, S M; Hawkes, C P; Murphy, N

    2014-01-01

    The National Health Service in the UK has identified thirteen key standards of paediatric diabetes care. Funding depends on services meeting these standards. The aim of this study was to determine if these standards are applicable in an Irish setting. All patients attending the diabetes service during 2012 were included. Patient charts, electronic appointments, nursing notes and computerised results were used to ascertain relevant information for comparison with the NHS standards. Patients attended a mean 2.97 (SD 0.7) medical and 2.2 (SD 2.9) nursing appointments per year, with a median additional contacts of 8 nurse phone calls (range 0 - 125). Most standards were met by this service. In comparing our service to the NHS standard, we have identified a number of areas for improving our service provision. Limited resources and staff shortages make a number of these standards unachievable, namely annual dietetic review and three monthly outpatient appointments. PMID:25226714

  19. Cache-aware Optimization of BAN Applications Lei Ju, Yun Liang, Samarjit Chakraborty, Tulika Mitra, Abhik Roychoudhury

    E-print Network

    Roychoudhury, Abhik

    cache re-use. In addition, we also investigate the effects on cache re-use of different memory layouts application ­ from the geriatric care domain ­ which is fed by a number of smart sensors to detect of the application on the gateway pro- cessor. e-Textiles [5], Wearable Motherboard [18], e-Textile [12], and RFab

  20. Application of Physiological Self-Regulation and Adaptive Task Allocation Techniques for Controlling Operator Hazardous States of Awareness

    NASA Technical Reports Server (NTRS)

    Prinzel, Lawrence J., III; Pope, Alan T.; Freeman, Frederick G.

    2001-01-01

    Prinzel, Hadley, Freeman, and Mikulka found that adaptive task allocation significantly enhanced performance only when used at the endpoints of the task workload continuum (i.e., very low or high workload), but that the technique degraded performance if invoked during other levels of task demand. These researchers suggested that other techniques should be used in conjunction with adaptive automation to help minimize the onset of hazardous states of awareness (HSA) and keep the operator 'in-the-loop.' The paper reports on such a technique that uses psychophysiological self-regulation to modulate the level of task engagement. Eighteen participants were assigned to three groups (self-regulation, false feedback, and control) and performed a compensatory tracking task that was cycled between three levels of task difficulty on the basis of the electroencephalogram (EEG) record. Those participants who had received self-regulation training performed significantly better and reported lower NASA-TLX scores than participants in the false feedback and control groups. Furthermore, the false feedback and control groups had significantly more task allocations resulting in return-to-manual performance decrements and higher EEG difference scores. Theoretical and practical implications of these results for adaptive automation are discussed.

  1. BW-M: A Framework for Awareness Support in Web-Based Groupware Systems Manuele Kirsch-Pinheiro, Marlne Villanova-Oliver, Jrme Gensel, Herv Martin

    E-print Network

    Paris-Sud XI, Université de

    1 BW-M: A Framework for Awareness Support in Web-Based Groupware Systems Manuele Kirsch for context- based awareness support designed for web-based groupware systems. Nowadays, such systems can for awareness support which is able to adapt the awareness information to the user's context, in order to reduce

  2. Network-aware Mobile Programs

    Microsoft Academic Search

    Anurag Acharya; Joel Saltz; M. Ranganathan; Shamik D. Sharma

    1997-01-01

    In this paper, we investigate network-aware mobile pro- grams, programs that can use mobility as a tool to adapt to variations in networkcharacteristics. We present infras- tructural support for mobility and network monitoringand show howadaptalk, a Java-based mobile Internet chat application can take advantage of this support to dynami- cally place the chat server so as to minimize response time.

  3. System-Aware Cyber Security

    Microsoft Academic Search

    Rick A. Jones; Barry Horowitz

    2011-01-01

    In this paper we outline the need for a new systems engineering architecturally focused approach for addressing the growing threats of debilitating cyber attacks: System-Aware Se- curity. This novel security architecture resides at the application layer and is based on smart reusable system security services. We layout an initial vision for this architectural formulation and show how it can potentially

  4. Context management and reasoning for adaptive service provisioning

    Microsoft Academic Search

    Boris Moltchanov; Michael Knappmeyer; Omri Fuchs; Elio Paschetta

    2009-01-01

    The European2228319 research project ¿C-Cast¿ (context-aware content casting) aims at providing an end-to-end system design for context-aware services and content provisioning. The project does not limit itself to reasoning but embraces also efficient service provisioning to user groups detected and formed according to the inferred user context. This paper presents the architecture components related to context acquisition through the reasoning

  5. Dice the TX Power -Improving Awareness Quality in VANETs by Random Transmit Power Selection

    E-print Network

    Gesbert, David

    Dice the TX Power - Improving Awareness Quality in VANETs by Random Transmit Power Selection to the applications regarding the required awareness quality, in particular by providing a higher awareness quality. It is transparent to the applications, and manages to improve the awareness quality in a dense highway by a factor 2

  6. Initial Results from an Energy-Aware Airborne Dynamic, Data-Driven Application System Performing Sampling in Coherent Boundary-Layer Structures

    NASA Astrophysics Data System (ADS)

    Frew, E.; Argrow, B. M.; Houston, A. L.; Weiss, C.

    2014-12-01

    The energy-aware airborne dynamic, data-driven application system (EA-DDDAS) performs persistent sampling in complex atmospheric conditions by exploiting wind energy using the dynamic data-driven application system paradigm. The main challenge for future airborne sampling missions is operation with tight integration of physical and computational resources over wireless communication networks, in complex atmospheric conditions. The physical resources considered here include sensor platforms, particularly mobile Doppler radar and unmanned aircraft, the complex conditions in which they operate, and the region of interest. Autonomous operation requires distributed computational effort connected by layered wireless communication. Onboard decision-making and coordination algorithms can be enhanced by atmospheric models that assimilate input from physics-based models and wind fields derived from multiple sources. These models are generally too complex to be run onboard the aircraft, so they need to be executed in ground vehicles in the field, and connected over broadband or other wireless links back to the field. Finally, the wind field environment drives strong interaction between the computational and physical systems, both as a challenge to autonomous path planning algorithms and as a novel energy source that can be exploited to improve system range and endurance. Implementation details of a complete EA-DDDAS will be provided, along with preliminary flight test results targeting coherent boundary-layer structures.

  7. Context Watcher ? Sharing context information in everyday life

    Microsoft Academic Search

    Johan Koolwaaij; Anthony Tarlano; Marko Luther; Petteri Nurmi; Bernd Mrohs; Raju Vaidya

    2006-01-01

    We present the Context Watcher, a mobile application that enables mobile phone users to easily and unobtrusively share personal context data such as their location, heart rate, speed, or view, with their mutual consent. Not only can the data be shared, it can also be used as input for information services, to adapt applications to the context, or to automatically

  8. Modeling a probabilistic ontology for Maritime Domain Awareness

    Microsoft Academic Search

    Rommel N. Carvalho; Richard Haberlin; Paulo Cesar G. Costa; Kathryn B. Laskey; K C Chang

    2011-01-01

    Situational awareness and prediction are essential elements of information fusion. Both involve various types of uncertainty and require a sound automated inferential process. Probabilistic ontologies support uncertainty management in se- mantically aware systems, and facilitate modular, interoperable systems. This paper describes the process of developing a prob- abilistic ontology for a Maritime Domain Awareness application. The ontology was created to

  9. Context-oriented programming: a software engineering perspective Guido Salvaneschia

    E-print Network

    Pradella, Matteo

    context-aware systems at the language-level, introducing ad-hoc language abstractions to manage, such as bandwidth availability, presence of WiFi or data connection, battery level, or current system workload {salvaneschi, ghezzi, pradella}@elet.polimi.it Abstract The implementation of context-aware systems can

  10. Situvis: visualising multivariate context information to evaluate situation specifications

    E-print Network

    Dobson, Simon

    these situations. Situations are thus a natural view of a context- aware system, whereas the individual pieces in a context- aware ubiquitous system. Our tool is based on well-founded situation specification semantics of the situation space, and the reliability of modelling with situations based on real, recorded sensor data. It

  11. Cache-aware Optimization of BAN Applications Yun Liang, Lei Ju, Samarjit Chakraborty, Tulika Mitra, Abhik Roychoudhury

    E-print Network

    Roychoudhury, Abhik

    fall detec- tion application ­ from the geriatric care domain ­ which is fed by a number of smart and prototype architectures in this area include MIThril [4], Cus- toMed [11], Wearable e-Textiles [5], Wearable Motherboard [18], e-Textile [13], and RFab-Vest [10]. Growth in this area has been largely fueled

  12. Some Diagnostic and Psychotherapeutic Implications of Community Awareness

    ERIC Educational Resources Information Center

    Krill, Donald F.

    1969-01-01

    Describes shift from traditional diagnostic function of state child agency toward diagnostic-consultant role, resulting from awareness of viewing pathology in context of child-family-agency-community. Presents two case studies illustrative of this interaction. (CJ)

  13. Supporting Location-Awareness in Open Distributed Systems

    Microsoft Academic Search

    Ulf Leonhardt

    1998-01-01

    Mobile computers and communication devices are establishing themselves as ubiquitousfeatures of daily life. This development is linked to tremendous growth in thenumber and sophistication of mobile and mobile-aware software applications. Increasingly,such applications need access to information about their own and other objects'physical locations, a requirement known as location-awareness.Existing location-aware applications and systems are typically tailored to a particulartype of...

  14. Achieving Optimal Privacy in Trust-Aware Social Recommender Systems

    NASA Astrophysics Data System (ADS)

    Dokoohaki, Nima; Kaleli, Cihan; Polat, Huseyin; Matskin, Mihhail

    Collaborative filtering (CF) recommenders are subject to numerous shortcomings such as centralized processing, vulnerability to shilling attacks, and most important of all privacy. To overcome these obstacles, researchers proposed for utilization of interpersonal trust between users, to alleviate many of these crucial shortcomings. Till now, attention has been mainly paid to strong points about trust-aware recommenders such as alleviating profile sparsity or calculation cost efficiency, while least attention has been paid on investigating the notion of privacy surrounding the disclosure of individual ratings and most importantly protection of trust computation across social networks forming the backbone of these systems. To contribute to addressing problem of privacy in trust-aware recommenders, within this paper, first we introduce a framework for enabling privacy-preserving trust-aware recommendation generation. While trust mechanism aims at elevating recommender's accuracy, to preserve privacy, accuracy of the system needs to be decreased. Since within this context, privacy and accuracy are conflicting goals we show that a Pareto set can be found as an optimal setting for both privacy-preserving and trust-enabling mechanisms. We show that this Pareto set, when used as the configuration for measuring the accuracy of base collaborative filtering engine, yields an optimized tradeoff between conflicting goals of privacy and accuracy. We prove this concept along with applicability of our framework by experimenting with accuracy and privacy factors, and we show through experiment how such optimal set can be inferred.

  15. NBS: a network-bandwidth-aware streaming version switcher for mobile streaming applications under fuzzy logic control

    Microsoft Academic Search

    Pengcheng XIONG; Jialie SHEN; Qingyang WANG; Deepal Jayasinghe; Jack Li; Calton Pu

    2012-01-01

    Good quality of service for a video streaming application under time-varying network bandwidth capacity is often required in many real-world scenarios, e.g., streaming in a typical high-speed vehicular environment. However, developing the enabling algorithms and techniques have been proven to be very challenging. Adaptive bitrate streaming method can detect a user's network bandwidth availability in real time and then adjust

  16. Location Aware Resource Management in Smart Homes

    Microsoft Academic Search

    Abhishek Roy; Soumya K. Das Bhaumik; Amiya Bhattacharya; Kalyan Basu; Diane J. Cook; Sajal K. Das

    2003-01-01

    The rapid advances in a wide range of wireless access tech- nologies along with the efficient use of smart spaces have already set the stage for development of smart homes. Context-awareness is perhaps the most salient feature in these intelligent computing platforms. The \\

  17. Awareness in Intercultural Communication.

    ERIC Educational Resources Information Center

    Roberts, Celia

    1998-01-01

    Extends the notion of language awareness to include intercultural communicative awareness. The interconnectedness of language and cultural processes is illustrated through a discussion of metapragmatic awareness. The second half of the article looks at the potential of misunderstandings in intercultural communication and charts some of the…

  18. A Generic Context Service for Ubiquitous Environments

    Microsoft Academic Search

    Holger Schmidt; Florian Flerlage; Franz J. Hauck

    2009-01-01

    The increase of mobile and interconnected devices demands for equally ubiquitous and mobile applications. Due to the heterogeneity of devices, applications have to adapt themselves to the environment they are executed in. This requires context management in the environment and context-sensitivity of the application. In this paper, we present a generic context service with a novel generic context model. Our

  19. NEWS: Science awareness

    NASA Astrophysics Data System (ADS)

    1999-05-01

    The Particle Physics and Astronomy Research Council's award scheme in the public understanding of science and technology for 1999 is currently under way and the first closing date has already passed. The second date for the receipt of applications for the Small Awards scheme is 10 October (open to anyone), with awards ranging from £250 up to the maximum of £10 000 per project. The funding can be used for materials, salaries, travel and subsistence, and there may be a slight preference towards projects involving young people and schools. Subject areas must be those relevant to PPARC: particle physics; space, ionospheric, solar and planetary science; astronomy, astrophysics and cosmology. Application documentation can be obtained from PUST Office Room 2232, PPARC, Polaris House, North Star Avenue, Swindon SN2 1SZ (tel: 01793 442002, e-mail: pr_pus@pparc.ac.uk and website http://www.pparc.ac.uk/role/notes.html). And whilst on this same theme, the deadline is fast approaching for a new Institute of Physics scheme intended to recognize work on increasing awareness of the exciting nature of physics and its relevance and impact on everyday life. The Public Awareness of Physics awards will recognize individuals and groups who have demonstrated excellence, inspiration and innovation in bringing physics to the public and assist in raising the status of this kind of activity. There are no restrictions on eligibility and nominees do not have to be members of the Institute of Physics, physicists or physics trained. Nominations may be made by anyone, with up to five awards to be given annually. Further details, nomination guidelines and forms are available from Katie Perry, Public Affairs Department, Institute of Physics, 76 Portland Place, London W1N 3DN (tel: 0171 470 4800, e-mail: katie.perry@iop.org).

  20. Awareness and Use of Folic Acid among Women in the Lower Mississippi Delta

    ERIC Educational Resources Information Center

    Robbins, James M.; Hopkins, Sarah E.; Mosley, Bridget S.; Casey, Patrick H.; Cleves, Mario A.; Hobbs, Charlotte A.

    2006-01-01

    Context: National and state efforts to increase folic acid awareness and use may not be reaching large segments of the population. Purpose: This study examines folic acid awareness and use among women of childbearing age in a representative, economically at-risk rural sample and identifies factors that influence awareness and use. Methods: A…