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Photonic gas sensors exploiting directly the optical properties of hybrid carbon nanotube localized surface plasmon structures

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Light(Science & Applications) 2016年第1期5卷 624-631页

作者： Thomas Allsop Raz Arif Ron Neal Kyriacos Kalli Vojtěch Kundrát Aleksey Rozhin Phil Culverhouse David J Webb Aston Institute of Photonic Technologies School of Engineering and Applied ScienceAston UniversityAston TriangleBirmingham B47ETUK Nanoscience Research Group School of Engineering and Applied ScienceAston UniversityAston TriangleBirmingham B47ETUK Physics Department Faculty of ScienceUniversity of SulaimaniSulaimaniIraq-Kurdistan Region Faculty of Science and Technology School of MathsComputing and RoboticsUniversity of PlymouthPlymouth PL48AAUK Department of Electrical Engineering Computer Engineering and InformaticsCyprus University of TechnologyLimassol 3036Cyprus

Weinvestigate the modification of the optical properties of carbon nanotubes(CNTs)resulting from a chemical reaction triggered by the presence of a specific compound(gaseous carbon dioxide(CO_(2)))and show this mechanism has important consequences for chemical *** have attracted significant research interest because they can be functionalized for a particular chemical,yielding a specific physical response which suggests many potential applications in the fields of nanotechnology and *** far,however,utilizing their optical properties for this purpose has proven to be *** demonstrate the use of localized surface plasmons generated on a nanostructured thin film,resembling a large array of nano-wires,to detect changes in the optical properties of the *** selectivity is demonstrated using CO_(2) in gaseous form at room *** demonstrated methodology results additionally in a new,electrically passive,optical sensing configuration that opens up the possibilities of using CNTs as sensors in hazardous/explosive environments.

关键词： carbon nanotubes gas sensors localized surface plasmons optical sensing

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An integrated e-recruitment system for CV ranking based on AHP

An integrated e-recruitment system for CV ranking based on A...

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作者： Faliagka, Evanthia Ramantas, Konstantinos Tsakalidis, Athanasios Viennas, Manolis Kafeza, Eleanna Tzimas, Giannis Computer Engineering and Informatics Department University of Patras Patras Greece Department of Maekting and Communication Athens University of Economics and Business Athens Greece Department of Applied Informatics in Management and Finance Faculty of Management and Economics Technological Educational Institute of Messolonghi Messolonghi Greece

ISBN: (纸本)9789898425515

In the last decades the explosion of Information and Communication Technologies has led to a whole new scenario concerning peoples' accessibility to new job opportunities and companies' options for employing the right person for the right job. But, is there a way to exploit today's technological advances as well as people's web presence in order to achieve this goal? In this work we present a set of techniques that makes the whole recruitment process more effective. We have implemented a system that models the candidate's CVs in HR-XML, and ranks the candidates based on AHP (Analytic Hierarchy Process). Finally, it presents the results to the recruiter who evaluates the top candidates and takes the final decision.

关键词： Analytic hierarchy process

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Lockstep Vs Microarchitecture: A Comparison

Lockstep Vs Microarchitecture: A Comparison

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IEEE International SOC Conference

作者： Ján Mach Lukáš Kohútka Pavel Čičák Institute of Computer Engineering and Applied Informatics Slovak University of Technology Bratislava Slovakia Institute of Informatics Information Systems and Software Engineering Slovak University of Technology Bratislava Slovakia

ISBN: (数字)9798350377569

ISBN: (纸本)9798350377576

Safety/mission-critical applications require high dependability of the control systems. Their state-of-the-art protection approach is a system-level lockstep. This paper compares the system-level dual and triple lockstep technique to the microarchitecture-level protection of the Hardisc RISC-V core. For a fair comparison, each system is based on the same core(s) and integrates protection against bit-flips in memory and transient faults in the bus. We propose a fault injection methodology, combining pre-synthesis simulation with synthesis data to analyse the vulnerability of a system to faults. The fault injection campaigns show that the Hardisc can withstand fault rates orders of magnitude higher than the dual-core lockstep system while preserving the same area and power consumption. It comes with a 5% frequency penalty. We have shown that system failures are more frequent once the fault rate reaches an application-specific threshold (one fault in 100 clock cycles).

关键词： Fault tolerance Microarchitecture Power demand Event detection Fault tolerant systems Registers System-on-chip Protection Transient analysis Clocks

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Interface Protection Against Transient Faults

Interface Protection Against Transient Faults

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IEEE Design and Diagnostics of Electronic Circuits and Systems (DDECS)

Increasing bus frequency to fulfill the performance requirements of dependable applications may increase the susceptibility of the system to transient faults. This paper describes an integration of protection against transient bus faults into the interface of the Hardisc RISC-V core. The protection is based on information redundancy with spatial redundancy features. It enables uninterrupted execution in the presence of transient faults and provides a hardware-software interface for its reporting. The benchmarking results indicate that most of the applications will be impacted minimally. The protection has a negligible impact on the maximal frequency and 8% area and power consumption overhead.

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Influence of Structural Units on Vulnerability of Systems with Distinct Protection Approaches

Influence of Structural Units on Vulnerability of Systems wi...

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Euromicro Symposium on Digital System Design

作者： Ján Mach Lukáš Kohútka Pavel Čičak Institute of Computer Engineering and Applied Informatics Slovak University of Technology Bratislava Slovakia Institute of Informatics Information Systems and Software Engineering Slovak University of Technology Bratislava Slovakia

ISBN: (数字)9798350380385

ISBN: (纸本)9798350380392

Mission/safety-critical applications rely on the dependability of their semiconductor control systems. The lockstepping is state-of-the-art when it comes to their protection. This paper compares the dual/triple lockstep systems with the Hardisc, which features microarchitecture-level protection. For a fair comparison, each system is based on the same architecture and integrates protection against bit-flips in memory and transient faults in the bus. We analyse how individual structures of the system affect the vulnerability of a system to faults. Our fault injection methodology combines pre-synthesis simulation with synthesis data to scale the fault rate of the structures according to their size. The results show that the Hardisc can withstand fault rates orders of magnitude higher than the dual-core lockstep system while preserving the same area and power consumption. It comes with a 5% frequency penalty. The pipeline logic has the most significant impact on the vulnerability of the lockstep system. On the other hand, the ECC-protected register file constraints the maximum failure rate the Hardisc can withstand due to fault accumulation during specific program sections.

关键词： Fault tolerance Power demand Microarchitecture Digital systems Pipelines Fault tolerant systems Registers Logic Protection Transient analysis

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Status quo bias in configuration systems 1

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Lecture Notes in computer Science

作者： Mandl, Monika Felfernig, Alexander Tiihonen, Juha Isak, Klaus Institute for Software Technology Graz University of Technology Inffeldgasse 16b A-8010 Graz Austria Computer Science and Engineering Aalto University 02015 TKK Finland Institute for Applied Informatics University of Klagenfurt Universitaetsstrasse 65-67 A-9020 Klagenfurt Austria

ISBN: (数字)9783642218224

ISBN: (纸本)9783642218217

Product configuration systems are an important instrument to implement mass customization, a production paradigm that supports the manufacturing of highly-variant products under pricing conditions similar to mass production. A side-effect of the high diversity of products offered by a configurator is that the complexity of the alternatives may outstrip a user's capability to explore them and make a buying decision. A personalization of such systems through the calculation of feature recommendations (defaults) can support customers (users) in the specification of their requirements and thus can lead to a higher customer satisfaction. A major risk of defaults is that they can cause a status quo bias and therefore make users choose options that are, for example, not really needed to fulfill their requirements. In this paper we present the results of an empirical study that aimed to explore whether there exist status quo effects in product configuration scenarios. © 2011 Springer-Verlag.

关键词： Customer satisfaction

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Hardened Processor Architecture

Hardened Processor Architecture

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International Conference on Mixed Design of Integrated Circuits and Systems (MIXDES)

Processors for terrestrial applications are protected by Earth's atmosphere and magnetic field, so the probability of single event effects (SEE) is significantly lower. Shrinking of the technology nodes allows higher operational frequency and performance, but their susceptibility to SEE is increasing. Nowadays satellites and safety critical automotive applications require more and more computational power. The hardening by design has been implemented mainly by redundancy of the whole cores. The consequences are lower frequency, larger area, and higher power consumption. We propose a novel hardening technique, which enables high frequency operation and doesn't cause large power consumption and area overhead. The protection is based redundancy and separation of the pipeline into two main sections. It provides a fast detection of faults, simple recovery by flush of the pipeline, and allows a large prediction unit to be unprotected. The whole protection scheme can be implemented at the Register Transfer Level. We present the protection scheme at the core with RISC-V instruction set. Simulations confirm the protection can handle the injected faults. Synthesis shows, the protection lowers the maximum frequency by only about 4.7%. The area increase is only about 118% and can be even lower.

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A New RISC-V CPU for Safety-Critical Systems

A New RISC-V CPU for Safety-Critical Systems

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Mediterranean Conference on Embedded Computing (MECO)

In this paper, we propose a novel hardening technique against Single Event Effects, which enables high-frequency operation and does not cause large power consumption and area overhead. The protection is based on redundancy, separation of the pipeline into two main sections, and is fully applicable at Register Transfer Level. It provides fast detection of faults, simple recovery by a flush of the pipeline, and allows a large prediction unit to be unprotected. We present the protection scheme at the core with the RISC-V instruction set. Simulations confirm that the protection can handle the injected faults. Synthesis shows that protection lowers the maximum frequency by only 3.9%. The area increase is only 108% and can be even lower. Total power consumption increased by 119%.

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Workload-aware self-tuning histograms of string data 26th

Workload-aware self-tuning histograms of string data

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26th International Conference on Database and Expert Systems Applications, DEXA 2015

作者： Zoulis, Nickolas Mavroudi, Effrosyni Lykoura, Anna Charalambidis, Angelos Konstantopoulos, Stasinos Computer Science Athens University of Economics and Business Athens Greece Electrical and Computer Engineering National Technical University of Athens Kesariani Greece Applied Mathematical and Physical Science National Technical University of Athens Kesariani Greece Institute of Informatics and Telecommunications NCSR ‘Demokritos’ Athens Greece

ISBN: (纸本)9783319228488

In this paper we extend STHoles, a very successful algorithm that uses query results to build and maintain multi-dimensional histograms of numerical data. Our contribution is the formal definition of extensions of all relevant concepts;such that they are independent of the domain of the data, but subsume STHoles concepts as their numerical specialization. At the same time, we also derive specializations for the string domain and implement these into a prototype that we use to empirically validate our approach. Our current implementation uses string prefixes as the machinery for describing string ranges. Although weaker than regular expressions, prefixes can be very efficiently applied and can capture interesting ranges in hierarchically structured string domains, such as those of filesystem pathnames and URIs. In fact, we base the empirical validation of the approach on existing, publicly available Semantic Web data where we demonstrate convergence to accurate and efficient histograms. © Springer International Publishing Switzerland 2015.

关键词： Machinery

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Prediction of Parkinson’s disease based on artificial neural networks using speech datasets

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Journal of Ambient Intelligence and Humanized Computing 2023年第10期14卷 13571-13584页

作者： Liu, Wei Liu, Jierong Peng, Tao Wang, Guojun Balas, Valentina Emilia Geman, Oana Chiu, Hung-Wen School of Information and Communication Engineering Hainan University Hainan Haikou570228 China School of Computer Science and Cyber Engineering Guangzhou University Guangdong Guangzhou510006 China College of Biomedical Information and Engineering Hainan Medical University Street Hainan Haikou571199 China Department of Automation and Applied Informatics Aurel Vlaicu University of Arad Arad310130 Romania Department of Health and Human Development Stefan cel Mare University of Suceava Suceava720229 Romania Graduate Institute of Biomedical Informatics Taipei Medical University Taipei Taiwan

Parkinson’s disease (PD) is a progressive disorder of the nervous system that affects movement. Early prediction of PD can increase the chances of earlier intervention and delay the onset of the disease. Vocal impairment is one of the most important signs in the early stages of PD. Therefore, PD detection based on speech analysis and vocal patterns has attracted significant attention recently. In this paper, we propose a vowel-based artificial neural network (ANN) model for PD prediction based on single vowel phonation. Firstly, we propose a novel multi-layer neural network based on speech features to predict PD. The speech samples from 48 PD patients and 20 healthy individuals are processed into four types: vowel, number, word, and short sentence. Secondly, we establish ANN models with single-type speech samples versus combinations of multi-type speech samples, respectively. Comparative experiments demonstrate that the single-type vowel model is superior to other single-type models as well as multi-type models. Finally, we build a vowel-based ANN model for PD prediction and evaluate its performance. Extensive experiments demonstrate that the proposed model has a prediction accuracy of 91%, sensitivity of 99%, specificity of 82%, and area under the receiver operating characteristic curve (AUC) of 91%, which is superior to the performance of previous methods. Overall, this study demonstrates that the proposed model can provide good classification accuracy for predicting PD and can improve the rate of early diagnosis. © 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

关键词： Network layers

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