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Search Results: 1 - 10 of 13687 matches for " Anna Jadlovská "
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Tracking Trajectory of the Mobile Robot Khepera II Using Approaches of Artificial Intelligence
Peter uster , Anna Jadlovská
Acta Electrotechnica et Informatica , 2011, DOI: 10.2478/v10198-011-0006-y
Abstract: This paper introduces a solution to the reference trajectory tracking problem done by a differential wheeled mobile robot Khepera II. The paper includes a kinematic part and a dynamic part of the mathematical model of mobile robot. In this paper two approaches of the artificial intelligence are used i.e. genetic algorithm approach from evolutionary computing techniques and theory of neural networks. Genetic algorithm is used for parameters optimizing PID controller and K parameter so-called parameter speed of rotation at the tracking reference trajectory into defined control structure. For the creation forward and inverse neural model by the approach of neural networks are used forward neural networks of MLP type. The neural models are verified using Neural Network Toolbox. The forward neural model of the mobile robot is implemented into the IMC control structure together with the inverse neural model, which is used as a nonparametric neural controller. The purpose of the designed control structure is tracking the defined trajectory of the mobile robot using approaches of the artificial intelligence, which are verified by the simulations in the language Matlab/Simulink.
Predictive Control Design Based on Neural Model of a Non-linear System
Anna Jadlovská,Nikola Kabakov,Ján Sarnovsky
Acta Polytechnica Hungarica , 2008,
Abstract: This paper provides two approaches for design of Generalized Predictive Control(GPC) algorithm for a non-linear dynamic system. In the classical approach of the GPCstrategy the recursive method of least square is considered for calculating of the linearizedmodel parameters from the known analytic description of a particular non-linear system.The other purpose of this paper is to show an intelligent approach in which a feed-forwardneural network (Multi Layer Perceptron – MLP) is used for modeling the same non-linearsystem within the frames of the predictive control. The possibility of on-line estimation ofan actual parameters from the off-line trained neural model of the non-linear system bymeans method of the instantaneous linearization in each sample point is considered in GPCalgorithm design. The validity of classical and neural GPC strategy is tested by computersimulations in Matlab/Simulink language using architecture of S-functions of the libraryPredicLib.
Interactive Vision and Experimental Traditions: How to Frame the Relationship  [PDF]
Anna Estany
Open Journal of Philosophy (OJPP) , 2013, DOI: 10.4236/ojpp.2013.32046
Abstract: In recent decades, the cognitive view has had a considerable impact on the philosophy of science, and two reasons can for this be identified. First, philosophers have increasingly tended towards naturalistic approaches, as opposed to proposals that are more a priori. Second, the cognitive sciences underwent considerable development in the second half of the twentieth century. Motivated by the cognitive view in the philosophy of science, and within a naturalistic framework, the aim of this paper is to analyze the relationship between two pairs of views. On the one hand, I consider the theoretical and experimental traditions; and on the other, I examine the views of pure and interactive vision. The two pairs belong to two independent debates; one in the philosophy of science (theoretical vs. experimental traditions) and the other in cognitive psychology (pure vs. interactive vision). Theoretical traditions correspond to a conception of science according to which the goal of scientific practice is to formulate theories that represent the world, and in them experiments play only an instrumental role that is always subsidiary to theory. The model of science promoted in the program of logical empiricism is a good example of such a tradition. Experimental traditions, in contrast, challenge that conception of science by attributing a more important role to experimentation, which is said to provide its own path to knowledge.
A pilot study, a specially designed pillow may prevent developmental plagiocephaly by reducing pressure from the infant head  [PDF]
Anna Ohman
Health (Health) , 2013, DOI: 10.4236/health.2013.56A2006
Abstract:

Developmental plagiocephaly (DP) has been an increasing problem since the successful “back to sleep campaign”. The referrals for DP have increased by >400% during the years 2004 to 2008. Many infants spend less time in the prone position nowadays and some of the risk factors for DP are as follows: less than 3 times per day for the tummy time, torticollis and slow achievement of motor milestones. There is a need for better information to the parents but also for other strategies to prevent DP. The aim of this study was to investigate the effect of a special pillow and thus to reduce pressure on the infant head. Method: infants aged zero to two months were included in the study. They were randomized to either intervention group or control group. Head shape was investigated on two occasions, on the second occasion motor development, mobility and muscle function of the neck were also investigated. The parents were asked about tummy time and sleep position. All infants were investigated by the same physical therapist, blinded to group belonging. Result: seven infants had CVAI >3.5 on the last assessment, five of these had not used any method to reduce pressure. Fishers exact test showed a tendency where infants with reduced pressure on the head had less DP (P 0.08). Paired t test showed significant decrease in CVAI for the infants who had had reduced pressure on the head (P 0.01). Among these infants the CVAI was zero for 47% in the last assessment. For the infants who had not had a reduction of pressure on the head, there was no indication of a decrease of CVAI (P 0.45), and only 12% of these infants had a CVAI that was zero in the last assessment. Conclusion: this pilot study shows that a specially designed pillow may prevent DP in young infants. However, a larger sample is needed to confirm or disprove this. The study is planned to go on until there are 200 participants.

Models, AmI-Creator and A-Methodology for Ambient Intelligence Environments  [PDF]
Anna Chambers
Journal of Software Engineering and Applications (JSEA) , 2014, DOI: 10.4236/jsea.2014.74030
Abstract:

The current paper introduces an approach to a development of Ambient Intelligence domain-based software systems from scratch. The presented approach is based on models. The paper also presents the domain-related models expressing different levels of abstractions and stages of the development. The approach refers to a Model-Driven Development of Ambient Intelligence which was suggested at AmI-07-Ambient Intelligence conference. The approach is presented as a standard with its feasible realization. It starts from modeling of a content of the future AmI-dedicated software system and concludes by mapping the graphical concepts into a final code. A process proving feasibility and correctness of the approach is provided through a dedicated research methodology. Its process comprises an identification of needs in a speedy development of the systems. It is followed by studying of the currently available techniques capable of supporting the development and an experimenting with them. It continues by finding a solution, verified by its validation and concludes by an identification of the further perspectives. The developed approach presents a common way of a communication amongst stakeholders participating in creating of AmI-based environments. Such communication involves the notations of AmI-Creator—a Domain-Specific Language of Ambient Intelligence domain. Every part of DSL corresponds to a demonstration of A-methodology expressing a step-by-step guidance for the development. The methodology comprises two parts dedicated to providing semantics for DSL through studying of Ambient Intelligence domain ontology; and development of actual environments. A validity of the working proposition is confirmed by three examples. The further challenges refer to an extension of the presented work by other frameworks and expansion to a development of different domains with complex organizations.

A specially designed pillow may be used as treatment for young infants with developmental plagiocephaly  [PDF]
Anna ?hman
Health (Health) , 2013, DOI: 10.4236/health.2013.512280
Abstract:

Developmental plagiocephaly has increased since the back to sleep campaign and is nowadays a rather common condition in infants. Prevention is the best way to decrease this problem, therefore, tools for treatment are needed. This case description of two children who dropped out from a study of a specially designed pillow indicates that the Mimos pillow may work as the treatment in young infants with developmental plagiocephaly.

Beighton Scores for Healthy Infants at the Age of Three Months  [PDF]
Anna ?hman
Open Journal of Therapy and Rehabilitation (OJTR) , 2015, DOI: 10.4236/ojtr.2015.32006
Abstract: Objective: To investigate the incidence of hypermobility in infants at the age of three months. Method: Eighty-one healthy infants aged three months were examined using the Beighton score. The spine was excluded for practical reasons; due to this the highest possible Beighton score for the participants in this study was 8. Also ankle dorsiflexion and the big toe were examined. Results: The mean score on the Beighton scale was 2.7; median was 2.0 and the range was 0 to 6. Almost half of the infants scored at least 4 on the Beighton scale. T test showed no gender difference. Neither was there any difference between right and left sides. Conclusions: Infants at the age of three months have high mobility in the distal joints, ankle dorsiflexion, thumb and little finger. It is rare to find hypermobility in elbows and knees at this age.
The Role of an Implicit Assumption of Causality in the Methodology of Empirical Research  [PDF]
Anna Storozhuk
Open Journal of Philosophy (OJPP) , 2018, DOI: 10.4236/ojpp.2018.83022
Abstract: The purpose of the article is to point out the causal ladenness of empirical data in the social sciences. This is a kind of theory ladenness, representing implicit assumptions about the deterministic nature of political processes. The nonlinear and chaotic nature of social phenomena requires the collection of data not only about the current state of the system, but also about the evolution of the system. Using an example, we illustrate that the conclusions made on the basis of information about the final state can be very different from the conclusions made on the basis of monitoring the dynamics of the system. Low-importance factors can have big consequences in a chaotic case and, vice versa, there takes place fading of causality: considerable efforts can lead to more than modest results. For the successful management of political life, it is important to be able to identify the impacts that lead to great consequences.
Forming Stages of Polycrystalline TiN Films Depending on the Nitrogen Concentration in Mixed Gas  [PDF]
Anna L. Kameneva
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.21002
Abstract: The influence of nitrogen concentration in mixed gas on temperature conditions, structure and phase composition of the TiN film deposited by arc spraying has been investigated. By electron microscopic investigations and X-ray diffraction phase analysis was recognized forming stages and structuring process of the film with main cubic phase (111) TiN. It was discovered that forming stages and process of structuring of ion-plasma TiN films are affected by both film temperature and its rate of heating.
The Failure of Economic Theory. Lessons from Chaos Theory  [PDF]
Marisa Faggini, Anna Parziale
Modern Economy (ME) , 2012, DOI: 10.4236/me.2012.31001
Abstract: The crisis that was being shaken the world economy should push economists to wonder about the approach used to analyse economic phenomena. The motivations that have generated it, describing a whole of interdependencies, interacttions, are clear and convincing. But a question remains: if the situation is so clear a posterior why economists have not been able to foresee it? What is happening to economic science if it is not able to recognize an economic crisis before it “steps on it“? How is it possible that the economic science was caught off guard yet again? Besides, what is the implication for the status of economics as a science if it is not able to successfully deal with real economic problems? The aim of the paper is to show the weakness of traditional economic theory and what improvements in terms of description and foresight could be obtained applying chaos theory to the study of economic phenomena.
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