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Search Results: 1 - 10 of 398 matches for " Ladislav Samuelis "
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ORGANIZING VIRTUAL EUROPEAN SEMINARS AND SUMMER SCHOOL: SOCIAL SOFTWARE IN EDUCATION / Organizovanie virtuálnych európskych seminárov a letná kola: sociálny softvér vo vyu be
Samuelis Ladislav
Technológia vzdelávania , 2008,
Abstract: The VENUS (Virtual and E-mobility for Networking Universities in Society) project, running from March 2006 until February 2008, gives students and citizens the opportunity to participate in seminars taught by some of the world's most famous experts, through virtual mobility. The paper evaluates the sustainability of two different models of international virtual seminars: a seminar series during the academic year 2006-2007 and a one-week summer school in topic social software in education.Projekt VENUS (Virtual and E-mobility for Networking Universities in Society), ktory sa za al v mar-ci 2006 a trvá do februára 2008, dáva tudentom a ir ej verejnosti mo nos zú astni sa na sérii virtuálnych se-minárov, na ktorych predná ajú svetové osobnosti z vy-branych oblastí. Cie om príspevku je zhrnú dosiahnuté vysledky a poukáza na vyhody a nevyhody dvoch roz-li nych modelov medzinárodnych seminárov: série virtuálnych seminárov, ktoré sa uskuto nili v akademickom ro-ku 2006/2007 a ty dennej letnej koly v téme sociálny sof-tvér vo vyu be.
Notes on the Components for Intelligent Tutoring Systems
Ladislav Samuelis
Acta Polytechnica Hungarica , 2007,
Abstract: The aim of this contribution is to present briefly several views on the componentsfor the intelligent tutoring systems (ITSs) and to analyze the concepts behind them. We willbriefly analyze the concepts provided by the classical machine learning (ML) approachesand then we discuss the role of the components in distributed environment. Finally wesynthesize the converging trends of the ITSs technologies and try to outline further possibleresearch directions in building ITS from components.
On Principles of Software Engineering -- Role of the Inductive Inference
Ladislav Samuelis
e-Informatica Software Engineering Journal , 2012,
Abstract: This paper highlights the role of the inductive inference principle in software engineering. It takes the challenge to settle differences and to confront the ideas behind the usual software engineering concepts. We focus on the inductive inference mechanism’s role behind the automatic program construction activities and software evolution. We believe that the revision of rather old ideas in the new context of software engineering could enhance our endeavour and that is why deserves more attention.
Transformation of the Angular Power Spectrum of the Cosmic Microwave Background (CMB) Radiation into Reciprocal Spaces and Consequences of This Approach  [PDF]
Ladislav ?ervinka
Journal of Modern Physics (JMP) , 2011, DOI: 10.4236/jmp.2011.211165
Abstract: A formalism of solid state physics has been applied to provide an additional tool for the research of cosmological problems. It is demonstrated how this new approach could be useful in the analysis of the Cosmic Microwave Background (CMB) data. After a transformation of the anisotropy spectrum of relict radiation into a special two-fold reciprocal space it was possible to propose a simple and general description of the interaction of relict photons with the matter by a “relict radiation factor”. This factor enabled us to process the transformed CMB anisotropy spectrum by a Fourier transform and thus arrive to a radial electron density distribution function (RDF) in a reciprocal space. As a consequence it was possible to estimate distances between Objects of the order of ~102 [m] and the density of the ordinary matter ~10-22 [kg.m-3]. Another analysis based on a direct calculation of the CMB radiation spectrum after its transformation into a simple reciprocal space and combined with appropriate structure modelling confirmed the cluster structure. The internal structure of Objects may be formed by Clusters distant ~10 [cm], whereas the internal structure of a Cluster consisted of particles distant ~0.3 [nm]. The work points in favour of clustering processes and to a cluster-like structure of the matter and thus contributes to the understanding of the structure of density fluctuations. As a consequence it may shed more light on the structure of the universe in the moment when the universe became transparent for photons. On the basis of our quantitative considerations it was possible to derive the number of particles (protons, helium nuclei, electrons and other particles) in Objects and Clusters and the number of Clusters in an Object.
Theoretical and Practical Notes on Vending Strategies  [PDF]
Gustav Cepciansky, Ladislav Schwartz
iBusiness (IB) , 2011, DOI: 10.4236/ib.2011.31001
Abstract: The paper deals with an application of theory of mass servicing on some cases in vending strategies. The aim of the paper is to show how the theory which is apparently applicable for scientific problems can also be utilised in practical use. First, the necessary theoretical background will have been done and then some examples applied on vending practises will be given.
CO2: Different interpretation of the same data  [PDF]
Ladislav Kurc, Jan Kurc
Natural Science (NS) , 2011, DOI: 10.4236/ns.2011.36062
Abstract: From the complex topic, fundamental and com-prehensible arguments are selected and pre-sented so that the effect of atmospheric CO2concentration on balance in troposphere can be clearly evaluated. Presentation of relative values as used in the last report of an accredited scien-tific authority, the Intergovernmental Panel on Climate Change (IPCC), leads to considerable overestimation of the real situation. We docu-ment that the outcomes from this report of IPCC are provably false. Using a simple calculation, it is possible to demonstrate that the elevating of CO2 concentration does not cause the global warming in a degree that is expected basing on the report.
Tariffication Strategies and Charging Effectivity  [PDF]
Gustav Cepciansky, Ladislav Schwartz
iBusiness (IB) , 2011, DOI: 10.4236/ib.2011.33041
Abstract: The effort of all service providers is to maximize their revenues. The ideal case would be, when a service provider obtained payment for entire services provided. But it is not always possible. Some services may not be paid for. Distribution companies (electricity power, gas, and water), transport companies (airlines, railways, buses, and taxis), telecommunication companies and companies established by the government (e.g. cash of road tax) represent such type of enterprises. Their clients pay for the volume of drawn media, distance of transmission, service duration, amount of transmitted information or travelled distance. Most services are charged fully, but certain services are only charged partly or not at all. An appropriate theory concerning the service provision effectivity and charging policy will be done on examples from telecommunication business and from road tax cashing.
Nonabelian Dualization of Plane Wave Backgrounds  [PDF]
Ladislav Hlavaty, Miroslav Turek
Journal of Modern Physics (JMP) , 2012, DOI: 10.4236/jmp.2012.39143
Abstract: We investigate plane-parallel wave metrics from the point of view of their (Poisson-Lie) T-dualizability. For that purpose we reconstruct the metrics as backgrounds of nonlinear sigma models on Lie groups. For construction of dual backgrounds we use Drinfel’d doubles obtained from the isometry groups of the metrics. We find dilaton fields that enable to satisfy the vanishing beta equations for the duals of the homogenous plane-parallel wave metric. Torsion potentials or B-fields, invariant w.r.t. the isometry group of Lobachevski plane waves are obtained by the Drinfel’d double construction. We show that a certain kind of plurality, different from the (atomic) Poisson-Lie T-plurality, may exist in case that metrics admit several isometry subgroups having the dimension of the Riemannian manifold. An example of that are two different backgrounds dual to the homogenous plane-parallel wave metric.
Concatenated Processes in Commercial Business and in Global Economy  [PDF]
Gustav Cepciansky, Ladislav Schwartz
iBusiness (IB) , 2012, DOI: 10.4236/ib.2012.44037
Abstract: The paper deals with an application of theory stochastic processes on business practices and with consequences which the concatenated economic co-operation may have on the future economic growth. The aim of the paper is also to draw attention how the theory which is apparently applicable for solution of scientific problems can also be utilised in practical commercial and economic use. First, the necessary theoretical background will have been done and then some application examples will be given.
Short-time measurements of interception in mountain spruce forest
Ladislav Holko
Journal of Hydrology and Hydromechanics , 2010, DOI: 10.2478/v10098-010-0020-2
Abstract: Open area rainfall and throughfall measurements in the Western Tatra Mountains (altitude about 1500 m a.s.l.) made by tipping bucket gauges were used to estimate the usefulness of the short-time data in analysis of spruce interception. The 10-minute data from period 13 May-13 October 2009 did not reveal meaningful correlations between the open area rainfall and throughfall. Aggregated measurements representing individual rainfall events were more useful. They showed linear relationship between open area rainfall and throughfall for events with total rainfall depth in the open area exceeding 5 mm. Correlation between open area rainfall and throughfall for rainfall events with duration above 120 minutes was significantly better than for the shorter ones. Mean values of interception (percentage of open area rainfall which did not appear in throughfall) of individual rainfall events was high. When we excluded events for which throughfall was higher than the open area rainfall, mean interception for larger and longer rainfall events was 46% and 48%, respectively. For smaller (runoff depth below 5 mm) and shorter events (duration below 2 hours) the mean interception was 70% and 72%, respectively. However, the data revealed very high variability of interception.
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