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Search Results: 1 - 10 of 721 matches for " Nikos Comoutos "
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Comparative Reliability of the Infant Motor Profile (IMP) in the Greek Language for Infants 3 to 18 Months  [PDF]
Thomas Besios, Alexandra Hristara-Papadopoulou, Paris Iakovidis, Savas Mauromoustakos, Yannis Tzioumakis, Olympia Vliagofti, Nikos Comoutos
Open Journal of Pediatrics (OJPed) , 2018, DOI: 10.4236/ojped.2018.81001
Abstract: In recent years, many tests have been developed to evaluate the mobility and functional capacity of children with Cerebral Palsy (CP). The Infant Motor Profile (IMP) is a recent qualitative infant kinetic behavior assessment for ages 3 to 18 months. Thus, the purpose of the present study is to determine the reliability of the IMP translated for the first time for Greek population, for infants aged 3 to 18 months in order to provide a reliable tool in the hands of experts. Twenty infants (11 girls and 9 boys) with average age ±12.75 months participated in the study. The Greek version of the IMP and a Nikon 5300 digital camera for video recording were used for data collection. The results showed that there were no statistically significant differences between the two independent evaluators and that the Greek IMP had strong reliability. Overall, the results of the present investigation provided considerable evidence suggesting that the Greek version of the IMP test is reliable and can be used to detect kinetic disorders in infants aged 3 to 18 months for the Greek population.
Effects of the Neurodevelopmental Treatment (NDT) on the Mobility of Children with Cerebral Palsy  [PDF]
Thomas Besios, Aggeloussis Nikolaos, Gourgoulis Vassilios, Mauromatis Giorgos, Yannis Tzioumakis, Nikos Comoutos
Open Journal of Therapy and Rehabilitation (OJTR) , 2018, DOI: 10.4236/ojtr.2018.64009
Abstract: The purpose of the present study was to examine the effectiveness of the NDT method (Bobath) in children with CP. Twenty children with cerebral palsy (7 with quadriplegia, 6 with diplegia and 7 with right hemiplegia), with mean age of 4. 85 ± 2. 49 years, took part in the study. Materials-Method: The children participated in an intervention that consisted of an 8-week Bobath program. GMFM-88, PEDI and TUG scores were measured across three time points during the intervention (a baseline measurement, a second at the end of the intervention and a post-intervention measurement one month after the end of the intervention). Results: The results of the NDT intervention showed that the participant children significantly improved their GMFM-88 and TUG scores between initial and final measurement and maintained this one month later (F2,36 = 69,778, p < 0.001), while in PEDI the intervention program had no statistically significant effect (F2,36 = 0.844, p = 0.438). In conclusion, there is strong evidence of the effectiveness of the NDT (Bobath) method in improving the mobility of children regardless of the frequency of its application.
New strategy for controlling structures collapse against earthquakes  [PDF]
Nikos G. Pnevmatikos
Natural Science (NS) , 2012, DOI: 10.4236/ns.2012.428088
Abstract: A control strategy for structures subjected to earthquake actions is investigated. The strategy is inspired from the human beings reaction when they are attack by earthquake excitation. Humans realize the earthquake excitation by the neurons, sent this information to the brain, a decision is taken there and by neuron system the decision is sent it back to the muscles for suitable action. In similar way the control strategy consists of monitoring the incoming signal, analyzing it and recognizing its dynamic characteristics, applying the control algorithm for the calculation of the required action, and, finally, applying this action. Thus, the way in which the structure is controlled, and the algorithm that is used, are based on the dynamic characteristics and the frequency content of the applied earthquake signal. The algorithm transforms the earthquake signal and structure into a complex plane and, depending on their relative positions, the equivalent forces that should be applied to the structure by the control devices, which are installed on the building, are calculated. From the numerical results it is shown that the above control procedure is efficient in reducing the response of building structures subjected to earthquake loading, with small amount of required control forces. The influence of time delay and saturation capacity is taken into account. Characteristic buildings controlled by pole placement algorithm and subjected to earthquake excitation are analyzed for a range of levels of time delay and saturation capacity of the control devices. The response reduction surfaces for the combined influence of time delay and force saturation of the controlled buildings are obtained. Conclusions regarding the choice of the control system and the desired properties of the control devices are drawn.
A Methodology for Introducing M&V Adjustments during an Energy Retrofit Impact Assessment  [PDF]
Nikos Sakkas, Evangelos Kaltsis
Open Journal of Energy Efficiency (OJEE) , 2014, DOI: 10.4236/ojee.2014.33008
Abstract: The assessment of an energy retrofit necessarily requires an energy measurement campaign before (base year energy consumption) and after (post retrofit energy consumption) the retrofit. Only in this way is it possible to reach a safe conclusion, on the true retrofit impact. In addition, a number of adjustments are necessary to secure that the retrofit impact on energy consumption is effectively isolated, i.e., which we report on the true retrofit impact and not, for example, on external variations, such as a more mild winter. This paper introduces a conceptual framework for taking account, in the retrofit impact assessment, of three external parameters: weather, indoor comfort and space occupancy. The broader strategy behind this work is to develop a comprehensive methodology that would allow a cost efficient, fast and accurate assessment of energy retrofits in buildings. This would allow insight, on the investor side, as to the prudence of his investment and, and in this way, could help the proliferation of the practice of energy retrofits. The adjustment methodology, introduced here, is a first step in this direction.
Localization of a Target with Three Degrees of Freedom Using a Low Cost Wireless Infrared Sensor Network  [PDF]
Nikos Nikos PETRELLIS, Fotios GIOULEKAS, Michael BIRBAS, John KIKIDIS
Wireless Sensor Network (WSN) , 2009, DOI: 10.4236/wsn.2009.15052
Abstract: The estimation of the position of a mobile target on a plane as well as its orientation is an important aspect for many applications. The indoor or outdoor localization of such a target has been widely addressed in the literature but if a third degree of freedom like rotation has to be also taken into consideration the difficulty in estimating the target position and orientation is significantly increased. A network consisting of only a small number of low cost infrared transmitters/receivers is used in this paper to estimate the position of a mobile target on a plane as well as its draft orientation with an angular step of 45o or less. The distance and orientation estimation is based on the success rate that infrared patterns are retrieved at the target. This success rate parameter is calculated by simple ultra low cost microcontrollers. The architectural complexity and cost of the overall localization system is significantly lower than other approaches without sacrificing speed and accuracy. An error correction scheme like Turbo decoding is applied in order to increase the reliability and stability of the results by correcting burst errors introduced by real time noise.
Parametric Evaluations of the Rogers-Ramanujan Continued Fraction
Nikos Bagis
International Journal of Mathematics and Mathematical Sciences , 2011, DOI: 10.1155/2011/940839
Abstract: In this paper with the help of the inverse function of the singular moduli we evaluate the Rogers-Ranmanujan continued fraction and its first derivative. 1. Introductory Definitions and Formulas For , the Rogers-Ramanujan continued fraction (RRCF) (see [1]) is defined as We also define Ramanujan give the following relations which are very useful: From the theory of elliptic functions (see [1–3]), is the elliptic integral of the first kind. It is known that the inverse elliptic nome , is the solution of the equation where . When is rational then the are algebraic numbers. We can also write the function using elliptic functions. It holds (see [3]) and also holds From [4] it is known that Consider now for every the equation which has solution Hence for example With the help of function we evaluate the Rogers Ramanujan continued fraction. 2. Propositions The relation between and is (see [1] page 280) For to solve (2.1) we give the following. Proposition 2.1. The solution of the equation when one knows is given by where If it happens that and , then and , . Proof. The relation (2.3) can be found using Mathematica. See also [5]. Proposition 2.2. If and then where is root of . Proof. Suppose that , where is positive integer and is positive real then it holds that where The following formula for is known: Thus, if we use (1.4) and (1.7) and the above consequence of the theory of elliptic functions, we get: See also [4, 5]. 3. The Main Theorem From Proposition 2.2 and relation we get Combining (2.2) and (3.1), we get Solving with respect to , we get Also we have The above equalities follow from [1] page 280 Entry 13-xii and the definition of . Note that is the multiplier. Hence for given , we find and we get the following parametric evaluation for the Rogers Ramanujan continued fraction Thus for a given we find and from (2.4) and (2.5). Setting the values of , , in (2.3) we get the values of and (see Proposition 2.1). Hence from (3.5) if we find we know . The clearer result is as follows. Main Theorem 3. When is a given real number, one can find from (2.3). Then for the Rogers-Ramanujan continued fraction the following holds: Theorem 3.1. (the first derivative). One has Proof. Combining (1.7) and (1.9) and Proposition 2.2 we get the proof. We will see now how the function plays the same role in other continued fractions. Here we consider also the Ramanujan's Cubic fraction (see [5]), which is completely solvable using . Define the function Set for a given Then as in Main Theorem, for the Cubic continued fraction , the following holds (see [5]): Observe here that
Finding Web Log Groups with Geometric Data Analysis
Nikos Koutsoupias
Journal of Emerging Trends in Computing and Information Sciences , 2011,
Abstract: Researchers and marketing information specialists consider server based weblog data important grounds for studying web user behavior. This work suggests Geometric Data Analysis methods as tools for the visualization and interpretation of web page access patterns. Web-wide data logs are utilized to discover usage patterns, so to better serve the needs both of internet usage researchers and e-marketing specialists.
Things, stuffs, and coincidence. A non-ontological point of view
Nikos Psarros
Hyle : International Journal for Philosophy of Chemistry , 2001,
Abstract: In this article the problem of the so-called 'coinciding objects', i.e. the question whether a substantially homogeneous thing is something ontologically different from the corresponding 'piece of stuff' it is made of or not, is examined from a pragmatical and language-analytical point of view. Instead of recurring to ontological assertions, I propose to regard 'stuffs' or 'substances' as a mode of speaking about things that fulfil the condition of being homogeneous in respect to a certain kind of properties that are called substantial properties. The coincidence problem is resolved by demonstrating that terms for substantially homogeneous things and the corresponding 'pieces of stuff' are predicative expressions in an Aristotelian genus-species relationship.
Bensaude-Vincent, B.: "éloge du Mixte. Matériaux nouveaux et philosophie ancienne" (Paris 1998) (book review)
Nikos Psarros
Hyle : International Journal for Philosophy of Chemistry , 1999,
Abstract: book review of Bensaude-Vincent, B.: "éloge du Mixte. Matériaux nouveaux et philosophie ancienne" (Paris 1998)
Greek-Romanian Symbiotic Patterns in the Early Modern Period: History, Mentalities, Institutions - II
Nikos Panou
Historical Review , 2008,
Abstract: This is the second part of a larger study seeking to contribute to a better understanding of the sustained process of religious, socio-political and cultural contact between Greek and Romanian ethnic groups in the early modern period. The two sections published here bring forward and discuss little-known and yet important evidence covering the first two post-Byzantine centuries and are intended to elaborate, supplement or contextualise the materials presented in the first part (which appeared in the previous volume of this journal). Not accidentally, this article ends with an unavoidable reference to the very text that ignited our exploration into the historical landscape of the pre-modern Balkans, a short but striking passage from Matthew of Myra's early seventeenth-century chronicle known as History of Wallachia. Indeed, Matthew's testimony stands out as one of the first conscious attempts to account for the uneasy, but also prolific, dynamic and multi-layered, relationship between the two peoples. It has been the aim of this paper to illustrate the basic patterns of that intricate, as much as intriguing, relationship as it was being shaped in the aftermath of the Byzantine Commonwealth's absorption into the challenging world of the Ottoman Turks.
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