Computer Technology and Application
Volume 4, Number 11, November 2013 (Serial Number 36)
Emre Aky¨¹rek, Alexandre Dilly, Fabrice Jourdan, Zhu Liu, Souraneel Chattoraj, Itziar Berruezo Juandeaburre, Michel Heinrich, Leonid Paramonov, Peter Turner, Stelarc and Tatiana Kalganova
Abstract: In the development of robotic limbs, the side of members is of importance to define the shape of artificial limbs and the range of movements. It is mainly significant for biomedical applications concerning patients suffering arms or legs injuries. In this paper, the concept of an ambidextrous design for robot hands is introduced. The fingers can curl in one way or another, to imitate either a right hand or a left hand. The advantages and inconveniences of different models have been investigated to optimise the range and the maximum force applied by fingers. Besides, a remote control interface is integrated to the system, allowing both to send commands through internet and to display a video streaming of the ambidextrous hand as feedback. Therefore, a robotic prosthesis could be used for the first time in telerehabilitation. The main application areas targeted are physiotherapy after strokes or management of phantom pains for amputees by learning to control the ambidextrous hand. A client application is also accessible on Facebook social network, making the robotic limb easily reachable for the patients. Additionally the ambidextrous hand can be used for robotics research as well as artistic performances.
Key words: Robot hand, pneumatic muscles, remote platform, video streaming, telerehabilitation, hand recognition.
Krzysztof Wołk and Krzysztof Marasek
Abstract: Text alignment is crucial to the accuracy of MT (Machine Translation) systems, some NLP (Natural Language Processing) tools or any other text processing tasks requiring bilingual data. This research proposes a language independent sentence alignment approach based on Polish (not position-sensitive language) to English experiments. This alignment approach was developed on the TED (Translanguage English Database) talks corpus, but can be used for any text domain or language pair. The proposed approach implements various heuristics for sentence recognition. Some of them value synonyms and semantic text structure analysis as a part of additional information. Minimization of data loss was ensured. The solution is compared to other sentence alignment implementations. Also an improvement in MT system score with text processed with the described tool is shown.
Key words: Text alignment, NLP tools, machine learning, text corpora processing.
Boris Levin and Motti Haridim
Abstract: The operation of a complicated radiators structure creating a required field in a given area is disturbed often due to different external actions. As an example, the impact of metallic objects approaching off to an antenna system with minimal irradiation on user¡¯s body is analyzed. In this case, the zone itself, where the area of a weak field (a dark spot) is created, is generally not approachable for sensors installation. In order to counteract the disturbance of the system operation due to presence of different metallic objects in close proximity to the radiators, two methods based on two information sources are studied. These information sources are antennas driving currents and fields at a predetermined point outside the given area. As an example, the antenna system used in the compensation method for reducing human¡¯s body irradiation, to which a metal object approaches, is analyzed. The conditions of severe external actions are considered: a great metal body and a small distance from this body to the dark spot. It is shown that under these conditions of severe external actions the second method based on the field values measuring demonstrates a higher efficiency. A block scheme for structure of an automatic adjustment is suggested. The considered problem is a common one, and developers of radio circuits are faced with them constantly.
Key words: Antennas, automatic adjustment, compensation method, irradiation, metallic environment, mobile antennas, monopoles.
Abstract: This paper presents comparison of numerical models used in an analysis of a road bridge deck. The models were adapted for computing the live load distribution coefficients in composite concrete bridge deck. The load distribution method was chosen for assessment of the usability of different numerical model in slab bridge deck analysis. The goal of the study is to determine a simplest but still accurate numerical model to estimate live load effects on composite slab bridge. In the analysis, the well-established grillage approach was adapted for representation of the bridge deck as a basic model as well as more sophisticated three-dimensional models which was supposed to better represent the real behavior of the deck under concentrated wheel loads. The bridge deck was effectively modeled using beam and shell elements. The grillage method compares well with the finite-element method. This finding is allowed to establish simplification in numerical modeling of slab bridge decks for live load effect computations.
Key words: Numerical model, bridge live load, numerical modeling, grillage method, FE analysis.
Baroudi Mohammed Yassine and Fethi Tarik Bendimerad
Abstract: For many years, computer systems have emerged; they now occupy an important place in our daily lives. The growing needs and ever increasing use of computer systems have made application development more and more complicated. The complexity of these applications poses problems such as reuse, installation, administration and evolution of applications. The development of applications is related to the evolution of paradigms and approaches to developing them. This paper presents different approaches and paradigms of development starting with the procedural approach, coming up for service, through the component and object-oriented approaches. Also, for each of the approaches we determine the advantages and limitations.
Key words: Service, reusing, dynamic application and service oriented approach.
Abstract: The paper presents physical and mathematical models of kinetic system, drive system (electric and combustion traction motors), and also wheel and rails traction vehicle supply system (car, special vehicle, modern tram vehicle). Selected predictive and quasi dynamic control system algorithms of traction vehicle are presented in the paper. For selected constructions of traction vehicle drive system are presented in simulation models and are results of calculations of different exploitations work state of wheel vehicle with hybrid drive system. Results of computer calculations are verified with laboratory measurement and suitable corrections coefficient to simulations models of vehicles is introduced.
Key words: Hybrid drive, predictive control, computer calculation.
Saeed Asaeedi, Farzad Didehvar and Aliakbar Safilian
Abstract: The enumeration of elements of c.e. sets in the theory of computability and computational complexity has already been investigated. However, the order of this enumeration has received less attention. The enumeration orders of elements of c.e. sets by means of Turing machines on natural numbers are investigated. In this paper, we consider the enumeration orders of elements of c.e. sets on rational numbers. We present enumeration order reducibility and enumeration order equivalence on rational numbers and propose some lemmas and theorems on these concepts. Also, we show that the theories here hold for Rc and we could repeat the same theories in this domain, in a same way.
Key words: Turing machine, listings, enumeration order reducibility, enumeration order equivalence.
Piotr Piątkowski and Tomasz Heese
Abstract: The article presents the results of traffic noise measurement research conducted in Szczecinek Center. The measurements were supported by European initiative called CIVITAS Reanissance. The measurements results were used for preparation of documents related to Sustainable Urban Transport Mobility Plan and Noise Action Plan. Traffic congestion is the main source of noise emission in the center Szczecinek. So there was a need to assess the noise emission level. Noise measurements were part of the measure implemented in Szczecinek during the CIVITAS project. It was made during implementation one of the ten measures implemented in Szczecinek. The main objectives of the measure were preparation and acoustic maps of the city center and prognosis the change of traffic noise in the future.
Key words: Traffic congestion, noise emission, acoustic maps.
This is Computer Technology and Application (Print ISSN: 1934-7332; Online ISSN: 1934-7340, USA), an international academic journal published monthly across the United States by David Publishing Company. Its topics include computer science and engineering in general, bio-science, image sciences, signal sciences, mathematical sciences, social and management sciences, nano sciences, intelligent systems, ubiquitous computing, etc.
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