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检索条件"任意字段=9th International Conference on Predictive Models in Software Engineering, PROMISE 2013"

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Smartphone Energizer: Extending Smartphone's battery life with smart offloading

Smartphone Energizer: Extending Smartphone's battery life wi...

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international Wireless Communications and Mobile Computing conference, IWCMC

作者： Ayat Khairy Hany H. Ammar Reem Bahgat Department of Computer Science Faculty of Computers and Information Cairo University Egypt The Lane Computer Science and Electrical Engineering Department West Virginia University USA

this paper presents “Smartphone Energizer”, a novel technique for context-aware computation offloading for smartphones. Previous techniques to the offloading problem were based on a narrow set of contextual information, which made the amount of energy saving varies unexpectedly based on the context in which the application is running. Smartphone Energizer uses the benefit of supervised learning with a rich set of contextual information such as application, device, network, and user characteristics to optimize both the energy consumption and execution time of Smartphone's applications in a variety of contextual situations. In our evaluation, we show that Smartphone Energizer predicts both energy consumption and execution time in different contexts with error less than 9%, which in turn helped in taking the right offloading decision and saving energy by 40% to 56% and execution time by 43% to 58%.

关键词： Energy consumption Servers predictive models Batteries Androids Humanoid robots Data models

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Predicting hypoglycemia in diabetic patients using data mining techniques

Predicting hypoglycemia in diabetic patients using data mini...

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international conference on Innovations in Information Technology

作者： Khouloud Safi Eljil Ghassan Qadah Michel Pasquier Department of Computer Science and Engineering American University of Sharjah Sharjah UAE

the proper control of blood glucose levels in diabetic patients reduces serious complications. Yet tighter glycemic control increases the risk of developing hypoglycemia, a sudden drop in patients' blood glucose levels that causes coma and possibly death if proper action is not taken immediately. In this paper, we propose a hypoglycemia prediction model, using recent history of subcutaneous glucose measurements collected via Continuous Glucose Monitoring (CGM) sensors. the model is able to predict hypoglycemia events within a prediction horizon of thirty minutes accurately (sensitivity= 86.47%, specificity= 96.22, accuracy= 95.97%) using only the last two glucose measurements and the difference between them. More remarkably, this study shows the ability to develop a generalized prediction model suitable for predicting hypoglycemia events for the group of patients participating in the study.

关键词： Sugar predictive models Time series analysis Sensitivity Bagging Accuracy Diabetes

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Leakage-resilient attribute-based encryption with fast decryption: models, analysis and constructions

Leakage-resilient attribute-based encryption with fast decry...

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9th international conference on Information Security Practice and Experience, ISPEC 2013

作者： Zhang, Mingwu Shi, Wei Wang, Chunzhi Chen, Zhenhua Mu, Yi School of Computers Hubei University of Technology China School of Computers Shaanxi Normal University China College of Information South China Agricultural University China Centre for Computer and Information Security Research School of Computer Science and Software Engineering University of Wollongong Australia

ISBN: (纸本)9783642380327

Traditionally, in attribute-based encryption (ABE), an access structure is constructed from a linear secret sharing scheme (LSSS), a boolean formula or an access tree. In this work, we encode the access structure as its minimal sets, which is equivalent to the existence of a smallest monotonic span program for the characteristic function of the same access structure. We present two leakage-resilient attribute-based encryption schemes, ciphertext-policy ABE (LR-CP-ABE) and key-policy ABE (LR-KP-ABE), that can tolerate private key and master key to be partially leaked. By using our encoding mechanism, we obtain short ciphertext in LR-CP-ABE and short key in LR-KP-ABE. Also, our schemes have higher decryption efficiency in that the decryption cost is independent to the depth of access structures. Meanwhile, our proposed schemes provide the tolerance of both master key leakage and continual leakage in the sense that there are many master keys for universal set Σ and many private keys per attribute set double-struck S. We explicitly employ a refresh algorithm to update a (master) key while the leakage information will beyond the allowable leakage bound. the schemes are proven to be adaptively leakage-resilient secure in the standard model under the static assumptions in composite order bilinear groups. © 2013 Springer-Verlag.

关键词： Encoding (symbols)

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Predicting burst error statistics of digital wireless systems with HARQ

Predicting burst error statistics of digital wireless system...

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international Wireless Communications and Mobile Computing conference, IWCMC

作者： Omar S. Salih Cheng-Xiang Wang Raed Mesleh Xiaohu Ge Dongfeng Yuan School of Engineering and Physical Sciences Heriot-Watt University Edinburgh UK Sensor Networks and Cellular Systems (SNCS) Research Center University of Tabuk Tabuk Saudi Arabia Department of Electronics and Information Engineering Huazhong University of Science and Technology Wuhan Hubei China School of Information Science and Engineering Shandong University Jinan China

Hybrid Automatic Retransmission reQuest (HARQ) is an effective technique to improve the reliability of wireless communication systems by detecting, correcting, and retransmitting the erroneous packets. Packet-level error sequences obtained from physical layer wireless communication systems are important for the design and performance evaluation of high layer protocols, e.g., HARQ. In this paper, we utilize the open source Vienna long-term evolution (LTE) simulator to study the impact of HARQ on the burst error statistics of packet-level error sequences. Moreover, we propose a generative model that can generate packet-level error sequences with predicted burst error statistics similar to those of error sequences obtained from wireless systems with HARQ. Simulation results demonstrate that the proposed generative model is accurate and efficient in predicting the behavior of HARQ in terms of a set of burst error statistics rather than predicting the packet error rate (PER) only.

关键词： Error analysis Wireless communication predictive models Hidden Markov models Physical layer Educational institutions Automatic repeat request

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An Algorithm for Cost-Effectively Storing Scientific Datasets with Multiple Service Providers in the Cloud

An Algorithm for Cost-Effectively Storing Scientific Dataset...

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IEEE international conference on e-Science and Grid Computing

作者： Dong Yuan Xiao Liu Lizhen Cui Tiantian Zhang Wenhao Li Dahai Cao Yun Yang Centre for Computing Engineering and Software Systems Swinburne University of Technology Melbourne Australia Shanghai Key Laboratory of Trustworthy Computing Software Engineering Institute of East China Normal University Shanghai China School of Computer Science and Technology Shandong University Jinan China School of Computer Science and Technology Anhui University Hefei China

the proliferation of cloud computing allows scientists to deploy computation and data intensive applications without infrastructure investment, where large generated datasets can be flexibly stored with multiple cloud service providers. Due to the pay-as-you-go model, the total application cost largely depends on the usage of computation, storage and bandwidth resources, and cutting the cost of cloud-based data storage becomes a big concern for deploying scientific applications in the cloud. In this paper, we propose a novel algorithm that can automatically decide whether a generated dataset should be 1) stored in the current cloud, 2) deleted and re-generated whenever reused or 3) transferred to cheaper cloud service for storage. the algorithm finds the trade-off among computation, storage and bandwidth costs in the cloud, which are three key factors for the cost of storing generated application datasets with multiple cloud service providers. Simulations conducted with popular cloud service providers' pricing models show that the proposed algorithm is highly cost-effective to be utilised in the cloud.

关键词： Bandwidth Cloud computing Computational modeling Algorithm design and analysis Finite element analysis Data models Educational institutions

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A hybrid mobility model based on social, cultural and language diversity

A hybrid mobility model based on social, cultural and langua...

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international conference on Collaborative Computing: Networking, Applications and Worksharing (CollaborateCom)

作者： Lutful Karim Qusay H. Mahmoud School of Information & Communications Technology Seneca College of Applied Arts and Science Toronto ON Canada Dept. Electrical Computer and Software Engineering University of Ontario Institute of Technology Oshawa ON Canada

Human Mobility models (HMMs) have become increasingly relevant in different application domains including networks designed for data dissemination protocols. Most existing HMMs consider the temporal and spatial features of human mobility. In addition, many recent HMMs based on social networks have begun to take into account social factors, which naturally influence the results of the HMMs. Unfortunately, these mobility models do not focus on the impact of several important social factors that can affect a person's actions, such as language, citizenship, and culture. this paper introduces a hybrid human mobility model that integrates social behavior, cultural and language factors into HMMs in order to measure their effect on human mobility, as well as temporal and spatial features. Results demonstrate the feasibility of the proposed model.

关键词： Hidden Markov models Communities Cultural differences Data models Protocols Social network services Global communication

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Using evidential reasoning to make qualified predictions of software quality 13

Using evidential reasoning to make qualified predictions of ...

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Proceedings of the 9th international conference on predictive models in software engineering

作者： Neil Walkinshaw The University of Leicester UK

ISBN: (纸本)9781450320160

software quality is commonly characterised in a top-down manner. High-level notions such as quality are decomposed into hierarchies of sub-factors, ranging from abstract notions such as maintainability and reliability to lower-level notions such as test coverage or team-size. Assessments of abstract factors are derived from relevant sources of information about their respective lower-level sub-factors, by surveying sources such as metrics data and inspection reports. this can be difficult because (1) evidence might not be available, (2) interpretations of the data with respect to certain quality factors may be subject to doubt and intuition, and (3) there is no straightforward means of blending hierarchies of heterogeneous data into a single coherent and quantitative prediction of quality. this paper shows how Evidential Reasoning (ER) - a mathematical technique for reasoning about uncertainty and evidence - can address this problem. It enables the quality assessment to proceed in a bottom-up manner, by the provision of low-level assessments that make any uncertainty explicit, and automatically propagating these up to higher-level 'belief-functions' that accurately summarise the developer's opinion and make explicit any doubt or ignorance.

关键词： estimation

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Are comprehensive quality models necessary for evaluating software quality? 13

Are comprehensive quality models necessary for evaluating so...

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Proceedings of the 9th international conference on predictive models in software engineering

作者： Klaus Lochmann Jasmin Ramadani Stefan Wagner Technische Universität München Engineering Munich Germany University of Stuttgart Stuttgart Germany

ISBN: (纸本)9781450320160

the concept of software quality is very complex and has many facets. Reflecting all these facets and at the same time measuring everything related to these facets results in comprehensive but large quality models and extensive measurements. In contrast, there are also many smaller, focused quality models claiming to evaluate quality with few *** investigate if and to what extent it is possible to build a focused quality model with similar evaluation results as a comprehensive quality model but with far less measures needed to be collected and, hence, reduced effort. We make quality evaluations with the comprehensive Quamoco base quality model and build focused quality models based on the same set of measures and data from over 2,000 open source systems. We analyse the ability of the focused model to predict the results of the Quamoco model by comparing them with a random predictor as a baseline. We calculate the standardised accuracy measure SA and effect *** found that for the Quamoco model and its 378 automatically collected measures, we can build a focused model with only 10 measures but an accuracy of 61% and a medium to high effect size. We conclude that we can build focused quality models to get an impression of a system's quality similar to comprehensive models. However, when including manually collected measures, the accuracy of the models stayed below 50%. Hence, manual measures seem to have a high impact and should therefore not be ignored in a focused model.

关键词： quality evaluation

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A coordination framework for dynamic adaptation in ubiquitous systems based on distributed tuple space

A coordination framework for dynamic adaptation in ubiquitou...

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international Wireless Communications and Mobile Computing conference, IWCMC

作者： Benedito J. A. Neto Rossana M. C. Andrade Marcio E.F. Maia Andre Fonteles Windson Viana Group of Computer Networks Software Engineering and Systems Federal University of Ceará Fortaleza Ceara Brazil

ISBN: (纸本)9781467324793

the evolution of mobile technologies allows the emerging of ubiquitous systems, able to anticipate user needs and to seamlessly adapt to context changes. these systems present the problem of dynamic adaptation in a highly distributed, heterogeneous and volatile environment, since it may be difficult to collect and process context information from distributed unknown sources. In order to facilitate the development of such systems, this paper extends an existing coordination framework based on tuple spaces, aiming at the management of distributed information. Hence, a decentralized coordination framework was created, offering primitives to developers to create ubiquitous systems able to interact and cooperate in scenarios of total decentralization. this paper reports some experimental results obtained in a testbed of smartphones and tablets which demonstrate the practical feasibility of our approach and pointed out how our solution can grant context data dissemination in ad hoc and infrastructured networks.

关键词： Context Ad hoc networks Mobile handsets Mobile communication Computational modeling Servers Adaptation models

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An algorithmic approach to missing data problem in modeling human aspects in software development 13

An algorithmic approach to missing data problem in modeling ...

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Proceedings of the 9th international conference on predictive models in software engineering

作者： Gul Calikli Ayse Bener Ryerson University

ISBN: (纸本)9781450320160

Background: In our previous research, we built defect prediction models by using confirmation bias metrics. Due to confirmation bias developers tend to perform unit tests to make their programs run rather than breaking their code. this, in turn, leads to an increase in defect density. the performance of prediction model that is built using confirmation bias was as good as the models that were built with static code or churn ***: Collection of confirmation bias metrics may result in partially "missing data" due to developers' tight schedules, evaluation apprehension and lack of motivation as well as staff turnover. In this paper, we employ Expectation-Maximization (EM) algorithm to impute missing confirmation bias ***: We used four datasets from two large-scale companies. For each dataset, we generated all possible missing data configurations and then employed Roweis' EM algorithm to impute missing data. We built defect prediction models using the imputed data. We compared the performances of our proposed models with the ones that used complete ***: In all datasets, when missing data percentage is less than or equal to 50% on average, our proposed model that used imputed data yielded performance results that are comparable with the performance results of the models that used complete ***: We may encounter the "missing data" problem in building defect prediction models. Our results in this study showed that instead of discarding missing or noisy data, in our case confirmation bias metrics, we can use effective techniques such as EM based imputation to overcome this problem.

关键词： confirmation bias

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