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International Conference on Context-Aware Systems and Applications最新文献

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A Survey on Low-Power Techniques for Single and Multicore Systems 单核与多核系统低功耗技术综述
International Conference on Context-Aware Systems and Applications Pub Date : 2014-10-07 DOI: 10.4108/ICST.ICCASA.2014.257372
Mahroo Zandrahimi, Z. Al-Ars
{"title":"A Survey on Low-Power Techniques for Single and Multicore Systems","authors":"Mahroo Zandrahimi, Z. Al-Ars","doi":"10.4108/ICST.ICCASA.2014.257372","DOIUrl":"https://doi.org/10.4108/ICST.ICCASA.2014.257372","url":null,"abstract":"This paper surveys state of the art low-power techniques for both single and multicore systems. Based on our proposed power management model for multicore systems, we present a classification of total power reduction techniques including both leakage and active power. According to this classification, three main classes are discussed: power optimization techniques within the cores, techniques for the interconnect and techniques applicable for the whole multicore system. This paper describes several techniques from these classes along with a comparison. For the whole multicore system, we focus on adaptive voltage scaling and propose a comprehensive taxonomy of adaptive voltage scaling techniques, while considering process variations.","PeriodicalId":426100,"journal":{"name":"International Conference on Context-Aware Systems and Applications","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127410255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Inference of Hygiene Behaviours While Recognising Activities of Daily Living 认识日常生活活动时的卫生行为推断
International Conference on Context-Aware Systems and Applications Pub Date : 2014-10-07 DOI: 10.4108/ICST.ICCASA.2014.257437
U. Naeem, A. H. Tawil, Ivans Semelis, G. Judah, R. Aunger
{"title":"Inference of Hygiene Behaviours While Recognising Activities of Daily Living","authors":"U. Naeem, A. H. Tawil, Ivans Semelis, G. Judah, R. Aunger","doi":"10.4108/ICST.ICCASA.2014.257437","DOIUrl":"https://doi.org/10.4108/ICST.ICCASA.2014.257437","url":null,"abstract":"Many health problems are generally caused by unhealthy behaviours that occur whilst conducting everyday Activities of Daily Living (ADL), such as poor use of sanitation and hygiene. This paper describes the development of an ADL inference engine, which is able to recognise natural hygiene behaviour patterns. As opposed to traditional ADL classification approaches, the developed inference engine employs a novel hierarchal structure for the modelling, representation and recognition of the ADLs, its associated tasks, objects, dependencies and their relationships. The organisation of this information in a contextual structure plays a key role in carrying out robust ADL recognition for the detection of hygiene behaviours. The proposed work also marks a shift in feature detection methodology, as it allows actual behaviour to be studied in its natural environment within actual households, with at least two individuals per household as opposed to a laboratory based controlled setting. This paper also presents experimental results that validate the performance of the inference engine.","PeriodicalId":426100,"journal":{"name":"International Conference on Context-Aware Systems and Applications","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114412113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Context-Based Security Framework for Cloud Services 基于上下文的云服务安全框架
International Conference on Context-Aware Systems and Applications Pub Date : 2014-10-07 DOI: 10.4108/ICST.ICCASA.2014.258610
H. Alqahtani, G. K. Mostéfaoui, Z. Maamar
{"title":"A Context-Based Security Framework for Cloud Services","authors":"H. Alqahtani, G. K. Mostéfaoui, Z. Maamar","doi":"10.4108/ICST.ICCASA.2014.258610","DOIUrl":"https://doi.org/10.4108/ICST.ICCASA.2014.258610","url":null,"abstract":"This paper discusses the use of Aspect-Oriented Programming (AOP) as an efficient way to handle cloud computing frontend security concerns. Without AOP, the necessary security code would be mixed with the business logic that the cloud service provider implements. This makes the maintenance of both code and business logic tedious and prone to errors. The proposed aspect-oriented approach in this paper is built upon a Web services frontend to the cloud service. Three types of context are taken into account when tuning the aspects (security services). The contexts contain various details on the environment of the Cloud and the Web services, which permit activating the necessary aspects in response to these details. A set of experiments validating this approach, are also reported in this paper.","PeriodicalId":426100,"journal":{"name":"International Conference on Context-Aware Systems and Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116104482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
An Introduction to Cloud-Based Pervasive Healthcare Systems 基于云的普及医疗保健系统简介
International Conference on Context-Aware Systems and Applications Pub Date : 2014-10-07 DOI: 10.4108/ICST.ICCASA.2014.257442
Sepideh Poorejbari, H. Vahdat-Nejad
{"title":"An Introduction to Cloud-Based Pervasive Healthcare Systems","authors":"Sepideh Poorejbari, H. Vahdat-Nejad","doi":"10.4108/ICST.ICCASA.2014.257442","DOIUrl":"https://doi.org/10.4108/ICST.ICCASA.2014.257442","url":null,"abstract":"The healthcare system is important due to its focus on human care and its interference with human lives. In recent years, we have witnessed a rapid rise in e-healthcare technologies such as Electronic Health Records (EHRs) and the importance of emergency detection and response. Cloud computing is one of the new approaches that can handle some of the challenges of smart healthcare in terms of security, sharing, integration and management. In this study, we review the significance and opportunities of using cloud computing in pervasive healthcare, and then look at the current as well as the future challenges it faces.","PeriodicalId":426100,"journal":{"name":"International Conference on Context-Aware Systems and Applications","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129409700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Improved Joint Pilot Allocation and Channel Estimation Algorithm for OFDM System 改进的OFDM系统联合导频分配和信道估计算法
International Conference on Context-Aware Systems and Applications Pub Date : 2014-10-07 DOI: 10.4108/ICST.ICCASA.2014.257309
L. U. Khan, S. Mahmud, G. M. Khan, H. Zafar, Zeeshan Shafiq
{"title":"Improved Joint Pilot Allocation and Channel Estimation Algorithm for OFDM System","authors":"L. U. Khan, S. Mahmud, G. M. Khan, H. Zafar, Zeeshan Shafiq","doi":"10.4108/ICST.ICCASA.2014.257309","DOIUrl":"https://doi.org/10.4108/ICST.ICCASA.2014.257309","url":null,"abstract":"A novel pilot insertion and channel estimation algorithm for orthogonal frequency division multiplexing (OFDM) systems over slow fading channels is presented. The pilots overhead in the proposed insertion technique is reduced to 12.5p as compared to conventional block type channel estimation. The proposed channel estimation algorithm is aimed at reducing the channel noise, which is inherent in the least square (LS) estimation. The proposed channel estimation algorithm uses LS for channel impulse response estimation at pilot subcarriers. The channel frequency response at all of the subcarriers for the entire block is estimated by using the inverse fast Fourier transform (IFFT), zero padding, and the fast Fourier transform (FFT). The performance (in terms of the bit error rate) of the proposed channel estimation algorithm and the pilot arrangement is compared with the LS estimation for block-type pilot arrangement. Simulation results show that the proposed channel estimation algorithm outperforms the block-type pilot arrangement with LS estimation.","PeriodicalId":426100,"journal":{"name":"International Conference on Context-Aware Systems and Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128406570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A Profit Oriented Session-based Admission Control Mechanism for the Cloud Environment 面向利润的基于会话的云环境准入控制机制
International Conference on Context-Aware Systems and Applications Pub Date : 2014-10-07 DOI: 10.4108/ICST.ICCASA.2014.257243
Abdel Rahman Tawakol, H. Hassan, S. Senbel
{"title":"A Profit Oriented Session-based Admission Control Mechanism for the Cloud Environment","authors":"Abdel Rahman Tawakol, H. Hassan, S. Senbel","doi":"10.4108/ICST.ICCASA.2014.257243","DOIUrl":"https://doi.org/10.4108/ICST.ICCASA.2014.257243","url":null,"abstract":"The proliferation of cloud-computing services has encouraged business-owners to migrate their applications to the cloud. With the existence of the Service Level Agreement (SLA) in the cloud, the business-owners can guarantee the quality of service they were promised to get from the providers. However, in such shared environment, there is a high probability of overload situations to occur violating the SLA, and causing profit losses to both providers and clients. This paper proposes an SLA-aware Profit-Oriented session-based Admission Control (POAC) mechanism that manages the overload problem in three-tier Web-based applications hosted on a cloud environment. The proposed Admission Control (AC) was validated using simulation. Our experiments show that the proposed approach makes profit-aware decisions, while taking the SLA in consideration. Thus benefiting both the service providers and the business-owners.","PeriodicalId":426100,"journal":{"name":"International Conference on Context-Aware Systems and Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129368540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Designing a Context-Aware Mobile Application for Eco-Driving 设计一个环境感知的生态驾驶移动应用程序
International Conference on Context-Aware Systems and Applications Pub Date : 2014-10-07 DOI: 10.4108/ICST.ICCASA.2014.256933
S. Gabrielli, Rosa Maimone
{"title":"Designing a Context-Aware Mobile Application for Eco-Driving","authors":"S. Gabrielli, Rosa Maimone","doi":"10.4108/ICST.ICCASA.2014.256933","DOIUrl":"https://doi.org/10.4108/ICST.ICCASA.2014.256933","url":null,"abstract":"This paper presents the design of a context-aware mobile application for eco-driving based on state-of-the-art data sensing-processing devices for improving effectiveness of driving style. The paper will address human factors' challenges related to the design and delivery of effective, context relevant feedback or audio notifications that can help the user to acquire and improve their level of eco-driving, by minimizing negative effects on user attention and motivation (considering typical app usage over time). The design case presented can inform the future development of more effective just-in-time interventions for eco-driving and sustainable mobility.","PeriodicalId":426100,"journal":{"name":"International Conference on Context-Aware Systems and Applications","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131024356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Sensing Healthy Lifestyle in Urban and Rural Environments 感知城市和农村环境中的健康生活方式
International Conference on Context-Aware Systems and Applications Pub Date : 2014-10-07 DOI: 10.4108/ICST.ICCASA.2014.256949
B. Arnrich, N. S. Erdem, Hasan Faik Alan, Cem Ersoy
{"title":"Sensing Healthy Lifestyle in Urban and Rural Environments","authors":"B. Arnrich, N. S. Erdem, Hasan Faik Alan, Cem Ersoy","doi":"10.4108/ICST.ICCASA.2014.256949","DOIUrl":"https://doi.org/10.4108/ICST.ICCASA.2014.256949","url":null,"abstract":"An extended framework for Android smartphones is employed to obtain objective and subjective measures of relevant lifestyle parameters. Participants were recruited from two very dissimilar environments: the city of Istanbul as one of the largest mega cities worldwide and the rural district of Mersin in the south-eastern part of Turkey. Correlation analysis between subjective ratings and objective sensor data features is performed to illustrate the potential of an automatic detection of health-relevant lifestyle parameters.","PeriodicalId":426100,"journal":{"name":"International Conference on Context-Aware Systems and Applications","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123912287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Context-Aware Cooperative Collision Avoidance Vehicle Braking Alert System for VANET 面向VANET的环境感知协同避碰车辆制动预警系统
International Conference on Context-Aware Systems and Applications Pub Date : 2014-10-07 DOI: 10.5555/2762722.2762739
Zeeshan Shafiq, L. U. Khan, S. Mahmud, G. M. Khan
{"title":"Context-Aware Cooperative Collision Avoidance Vehicle Braking Alert System for VANET","authors":"Zeeshan Shafiq, L. U. Khan, S. Mahmud, G. M. Khan","doi":"10.5555/2762722.2762739","DOIUrl":"https://doi.org/10.5555/2762722.2762739","url":null,"abstract":"Cooperative safety and infotainment were the key motivating factors behind the advent of vehicular communication architecture. In this paper, the Context-aware cooperative collision avoidance braking system is proposed. The vehicles moving in the same lane, closer than the safety distance (SD) are prompted to reduce their speed or increase the inter-vehicular distance. The SD is set according to the available parameters and road infrastructure, and is further tuned with the help of context-aware SD adjustment system. The system proposed is self-learning and alert messages are directed to only pertinent vehicles with the help of clustering. The hardware system is implemented in vehicle on highway for SD calculation.","PeriodicalId":426100,"journal":{"name":"International Conference on Context-Aware Systems and Applications","volume":"452 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116022415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
A Context-Oriented Approach for the Adaptation of Service Compositions 面向上下文的服务组合自适应方法
International Conference on Context-Aware Systems and Applications Pub Date : 2014-10-07 DOI: 10.4108/ICST.ICCASA.2014.257319
Karima Belgharbi, Mahmoud Boufaïda
{"title":"A Context-Oriented Approach for the Adaptation of Service Compositions","authors":"Karima Belgharbi, Mahmoud Boufaïda","doi":"10.4108/ICST.ICCASA.2014.257319","DOIUrl":"https://doi.org/10.4108/ICST.ICCASA.2014.257319","url":null,"abstract":"The environments of pervasive computing are open and dynamic. In order to ensure the adaptation of the service composition and the dynamic handling of the context in such environments, we suggest a new approach based on the taking into account information of context to adapt the process of composing services. Although there exist many composition norms that have been suggested, such as BPML and BPEL4WS, these norms are somewhat limited in terms of the dynamic adaptation of the service composition during the execution. In this paper, we present an approach that takes into account at the same time the user's context and the services, with integrating them in the service description language WSDL and in the composition process BPEL. The suggested extensions, known as A-WSDL and A-BPEL, permit us to describe the adaptations capable of bearing the service, the composition of services and the dynamic handling of context.","PeriodicalId":426100,"journal":{"name":"International Conference on Context-Aware Systems and Applications","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123443356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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