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Analyzing computation offloading energy-efficiency measurements

Analyzing computation offloading energy-efficiency measureme...

引用

IEEE International Conference on Communications Workshops, ICC

作者： Krisztián Fekete Kristóf Csorba Bertalan Forstner Tamás Vajk Marcell Fehér István Albert Department of Automation and Applied Informatics Budapest University of Technology and Economics

No one disputes that mobile phones have become part of everyday life. Besides phone calling we use them for browsing, messaging, playing games and many other things which were possible only on a desktop computer several years ago. Although these devices are even more “smart”, but due to the growing resource requirements their batteries are discharging in a very short period. This is a very important phenomenon, which forces to find alternative ways to reduce the energy consumption of the smartphones. One of them is the method of “computation offloading” where a part of the processes are executed on a remote device (e.g. in the cloud). The creation of an energy-efficiency model consists of several steps. One of the hardest part is to understand how a smartphone behaves in different circumstances. During the execution of an application every step has its own energy cost. To make the execution energy-efficiency, we need first to measure and analyse these costs. In this paper we are going to present a measurement system which is used to analyse the energy consumption of smartphones. The measurements were made in different scenarios and the goal was to save energy through offloading some tasks. The offloading process is based on scheduling theory.

关键词： Energy consumption Energy measurement Smart phones Mobile communication Processor scheduling Servers

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A general framework for innovative mobile biofeedback based educational games

A general framework for innovative mobile biofeedback based ...

引用

International Conference on Cognitive Infocommunications (CogInfoCom)

作者： Bertalan Forstner Luca Szegletes Róbert Angeli András Fekete Department of Automation and Applied Informatics Budapest University of Technology and Economics

Educational games on mobile devices are getting more and more popular due to the widespread usage of tablets among children. The effectiveness of autonomous learning can be increased with the use of properly processed biofeedback signals. The aim of our research is to create skill-developing and educational games with a framework based on estimating cognitive state and neurological feedback, which is general enough to be extended with different biofeedback sensor devices. The goal is to improve the learning efficiency by adapting to the users learning capabilities. Using the heart rate monitor and the EEG device we can examine the emotional and cognitive states of the user, modify the difficulty level and the attributes of the reward to fit the user's needs, helping to get the best results.

关键词： Games Biological control systems Learning (artificial intelligence) Heart rate Monitoring Biosensors

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Mobile Performance Metrics for Resource Management

Mobile Performance Metrics for Resource Management

引用

IEEE International Conference on System Science and Engineering

作者： Krisztian Pandi Hassan Charaf Department of Automation and Applied Informatics Budapest University of Technology and Economics

ISBN: (纸本)9781479900084

In information technology two recent trends can be observed. Mobile computer technology has greatly evolved providing various rich functionalities. Capabilities of mobile terminal is given, more performance can be obtained with adding additional resources. Cloud computing is recognized to be a new area for solving performance issues. These technologies used together can enhance the user experience of the mobile terminal. Sophisticated mobile resource management layer needs to be used, that can utilize extra performance of the cloud. The basis of effective resource management is a precise knowledge of the hardware and software capabilities, furthermore, the usage of mobile terminal. Performance metrics serve as an input for resource management. This study will present architecture of mobile performance measurement and profile creation layer. Key performance metrics are collected and investigated. Attributes of profile creation are also gathered. Architecture is examined, whether it can be later used as an input for mobile resource management.

关键词： management of resources Performance metrics mobile terminal Mobile ARCHITECTURE Building construction

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Towards an Energy efficient Code Generator for Mobile phones

Towards an Energy efficient Code Generator for Mobile phones

引用

International Conference on Cognitive Infocommunications (CogInfoCom)

作者： Krisztián Fekete Kristóf Csorba Tamás Vajk Bertalan Forstner Krisztián Pándi Department of Automation and Applied Informatics Budapest University of Technology and Economics

Using a smartphone become the part of our everyday life in the last few years. These devices can help us in many areas of life (sport, job, weather etc.), but sometimes can be also very annoying because of the battery life time. That is why it is very important to find solutions, which can reduce the energy consumption of the smartphones. One possible method is the “computation offloading” where a part of the processes are executed on a remote device (e.g. in the cloud). A lot of example has already shown, that computation offloading can reduce the energy usage of the mobile devices. However, the amount of energy saving may differ, as the decision making of the offloading process can be controlled with several techniques. Our decision making theory is based on the scheduling theory. In this paper, we are going to introduce a new system called ECGM (Energy efficient Code Generator for Mobile phones). ECGM decides automatically at compile time, which task should run on the smartphone and which task can be offloaded. The benefit of our system will be demonstrated through measurements based on our energy-efficiency scheduling technique.

关键词： Mobile communication Mobile handsets Energy consumption Generators Batteries Decision making Job shop scheduling

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Marker Localization with a Multi-Camera System

Marker Localization with a Multi-Camera System

引用

IEEE International Conference on System Science and Engineering

作者： David Szaloki Norbert Koszo Kristof Csorba Gabor Tevesz Department of Automation and Applied Informatics Budapest University of Technology And Economics

ISBN: (纸本)9781479900084

This paper presents a marker localization system consisting of multiple cameras. It is the basis of a real-time robotic motion tracking system aiming for high localization accuracy and high time resolution. These goals are achieved using several cameras with very redundant field-of-views. The paper presents the theoretical background of 3D camera calibration and localization, the localization accuracy measurement setup, and its results. The measurements are obtained using a color marker and an industrial robotic arm for measurement ground truth generation. The Smart Mobile Eyes for Localization (SMEyeL) project is open-source: the source code, all measurement input data and documentation are public available.

关键词： multi-camera system multiple camera Cameras Documentation Robot kinematics

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Modality classification for medical images using sparse coded affine-invariant descriptors

Modality classification for medical images using sparse code...

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PAKDD 2012 International Workshops: 3rd Data Mining for Healthcare Management, DMHM 2012, Multi-View Data, High-Dimensionality, External Knowledge: Striving for a Unified Approach to Clustering, 3Clust 2012, GeoDoc 2012 and 2nd DSDM 2012

作者： Gál, Viktor Solt, Illés Kerre, Etienne Nachtegael, Mike Department of Applied Mathematics and Computer Science Ghent University Belgium Department of Telecommunications and Media Informatics Budapest University of Technology and Economics Hungary

ISBN: (纸本)9783642367779

Modality is a key facet in medical image retrieval, as a user is likely interested in only one of e.g. radiology images, flowcharts, and pathology photos. While assessing image modality is trivial for humans, reliable automatic methods are required to deal with large un-annotated image bases, such as figures taken from the millions of scientific publications. We present a multi-disciplinary approach to tackle the classification problem by combining image features, meta-data, textual and referential information. We test our system's accuracy on the Image- CLEF 2011 medical modality classification data set. We show that using a fully affine-invariant feature descriptor and sparse coding on these descriptors in the Bag-of-Words image representation significantly increases the classification accuracy. Our best method achieves 87.89 and outperforms the state of the art. © 2013 Springer-Verlag.

关键词： Image classification

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Frequent Itemset Mining on Hadoop

Frequent Itemset Mining on Hadoop

引用

IEEE International Conference on Computational Cybernetics

作者： Ferenc Kovács János Illés Department of Automation and Applied Informatics Budapest University of Technology and Economics Budapest Hungary

ISBN: (纸本)9781479900626

One of the most important problems in data mining is frequent itemset mining. It requires very large computation and I/O traffic capacity. For that reason several parallel and distributed mining algorithms were developed. Recently the mapreduce distributed data processing paradigm is unavoidable and porting the current algorithms to mapreduce is in focus. In this paper a substantial frequent itemset mining algorithms and their mapreduce implementations are introduced and investigated. An algorithm improvement is also proposed and analyzed.

关键词： Itemset Mining developed

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Evaluating performance of cloud computing environments

Evaluating performance of cloud computing environments

引用

International Symposium on Computational Intelligence and informatics

作者： Akos Nagy Bence Kovari Department of Automation and Applied Informatics Budapest University of Technology and Economics Budapest Hungary

The emerging technology of cloud computing offers off-premise, reliable solutions for common IT related needs of enterprises, but as different providers often envision these solutions in a different way, architects face a complex problem when trying to decide which provider to choose and compare or estimate the costs of different options. This paper presents a generalized, provider-neutral service and cost model to describe the capabilities of different environments and the prices associated with them. This model can serve as the basis for mathematical optimization algorithms.

关键词： Benchmark testing Cloud computing Computational modeling Mathematical model Analytical models Pricing Data transfer

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Denormalizing data into schema-free databases

Denormalizing data into schema-free databases

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International Conference on Cognitive Infocommunications (CogInfoCom)

作者： Tamás Vajk Péter Fehér Krisztián Fekete Hassan Charaf Department of Automation and Applied Informatics Budapest University of Technology and Economics Budapest Hungary

With the proliferation of cloud service providers, the use of non-relational (NoSQL) data stores is increasing. In contrast to standard relational database schema design, which has its strong mathematical background in relational algebra and set theory, development with NoSQL data stores is largely based on empirical best practices. Furthermore, the huge variety of NoSQL variants may require different design considerations. In this paper, an algorithm is introduced to automatically derive cost and performance optimal schema in column-oriented data stores based on predefined queries and an initial relational database schema. Algorithms are given to perform database denormalization, as well as to transform the original queries to meet the newly created schemas.

关键词： Optimization Relational databases Indexes Navigation Cloud computing Load modeling

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Control of wind power

Control of wind power

引用

International Conference on Renewable Energy Research and Applications (ICRERA)

作者： Péter Nagy Péter Stumpf István Nagy Department of Automation and Applied Informatics Budapest University of Technology and Economics Budapest Hungary

The paper is concerned with the Wind Energy Converter System applying Doubly Fed Induction Generator. It treats the control of Rotor Side Converter when the stator flux oriented vector control strategy is used. The relations are derived governing the stator and rotor power flow and the electric torque controlled by the d and q component of the rotor supply voltage. The relations are illustrated by characteristics in per unit and their evaluations throw light to the physical background with practical application comments. The description is devised in a comprehensive and concise way.

关键词： Stators Rotors Reactive power Torque Wind turbines Vectors Generators

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