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Search Results: 1 - 10 of 4796 matches for " Wojciech Kochański "
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Single-Mirror Small-Size Telescope structure for the Cherenkov Telescope Array
Jacek Niemiec,Jerzy Micha?owski,Micha? Dyrda,Wojciech Kochański,Jaromir Ludwin,Marek Stodulski,Pawe? Zió?kowski,Pawe? ?ychowski for the CTA Consortium
Physics , 2013,
Abstract: A single-mirror small-size (1M-SST) Davies-Cotton telescope has been proposed for the southern observatory of the Cherenkov Telescope Array (CTA) by a consortium of scientific institutions from Poland, Switzerland, and Germany. The telescope has a 4 m diameter reflector and will be equipped with a fully digital camera based on Geiger avalanche photodiodes (APDs). Such a design is particularly interesting for CTA because it represents a very simple, reliable, and cheap solution for a SST. Here we present the design and the characteristics of the mechanical structure of the 1M-SST telescope and its drive system. We also discuss the results of a finite element method analysis in order to demonstrate the conformance of the design with the CTA specifications and scientific objectives. In addition, we report on the current status of the construction of a prototype telescope structure at the Institute of Nuclear Physics PAS in Krakow.
Model of electricity and heat generator based on a high temperature fuel cell for residential applications
Wojciech Bujalski,Wojciech Skowroński
Journal of Power Technologies , 2013,
Abstract: Increasing electricity requirements in residential sector create a possible market for small cogeneration systems. Such a system can be based on a new and highly efficient technology such as high temperature fuel cells. Mathematical modeling is a low cost and effective method for analyzing possible operation strategies and system economical results. The objective of this paper was to present the simulation results of operation of a micro CHP system based on a SOFC in Polish reality. The model of SOFC based micro-CHP system was developed. Based on this model the technical and economical analysis was performed. The results of sensitivity analysis established a SOFC performance variation with utilities price changes. Moreover, the optimum of a micro-CHP system was found to be 1 kW.
Wojciech Goleński
Studia Humanistyczne AGH , 2012,
Marketing Communication Strategies of the Industrial Companies
Wojciech Wodyński
Contemporary Economics , 2007,
Abstract: Industrial market, created by companies, which buy and sell goods which are not directly for consumption, but are used in production process, communicates with the environment in a specific way. Many industrial companies supply only the customers of non consumption goods market and hence they do not enter into direct contact with a final consumer. In such cases recognizing the customersí needs is even more difficult. Such environment requires efficiently functioning and planned communication of the company with the market. This study presents methods and strategies of marketing communication really used in industrial companies. While analysing marketing strategies of industrial companies, the author draws the attention to the fact that even though there was system transformation, the state still has significant impact on functioning and development of industry and that in a way directs and created barriers in companies functioning. Such conditions force even more active marketing communication as well as searching new solutions. As there are more and more sophisticated marketing techniques related to digital media, there is also a growing demand for strategic solutions in marketing communication. Digital media, first of all the Internet, provide so far unavailable possibilities of researching consumersí behaviours and ways of using media. They also give a chance to follow the behaviour of smaller, unique and often social groups of consumers.
On contact equivalence of systems of ordinary differential equations
Wojciech Kryński
Mathematics , 2007,
Abstract: We consider a problem of equivalence of generic pairs $(X,V)$ on a manifold $M$, where $V$ is a distribution of rank $m$ and $X$ is a distribution of rank one. We construct a canonical bundle with a canonical frame. We prove that two pairs are equivalent if and only if the corresponding frames are diffeomorphic. As a particular case, with $V$ integrable, we provide a new solution to the problem of contact equivalence of systems of $m$ ordinary differential equations: $x^{(k+1)}=F(t,x,x',...,x^{(k)})$, where $k>2$ or $k=2$ and $m>1$.
Webs and projective structures on a plane
Wojciech Kryński
Mathematics , 2013,
Abstract: We prove that there is a correspondence between projective structures defined by torsion-free connections with skew-symmetric Ricci tensor and Veronese webs on a plane. The correspondence is used to characterise the projective structures in terms of second order ODEs.
Prediction of Functional Sites Based on the Fuzzy Oil Drop Model
Micha? Bryliński,Katarzyna Prymula,Wiktor Jurkowski,Marek Kochańczyk,Ewa Stawowczyk,Leszek Konieczny,Irena Roterman
PLOS Computational Biology , 2007, DOI: 10.1371/journal.pcbi.0030094
Abstract: A description of many biological processes requires knowledge of the 3-D structure of proteins and, in particular, the defined active site responsible for biological function. Many proteins, the genes of which have been identified as the result of human genome sequencing, and which were synthesized experimentally, await identification of their biological activity. Currently used methods do not always yield satisfactory results, and new algorithms need to be developed to recognize the localization of active sites in proteins. This paper describes a computational model that can be used to identify potential areas that are able to interact with other molecules (ligands, substrates, inhibitors, etc.). The model for active site recognition is based on the analysis of hydrophobicity distribution in protein molecules. It is shown, based on the analyses of proteins with known biological activity and of proteins of unknown function, that the region of significantly irregular hydrophobicity distribution in proteins appears to be function related.
Single-freeze-out model for ultra relativistic heavy-ion collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV and the LHC proton puzzle
Maciej Rybczyński,Wojciech Florkowski,Wojciech Broniowski
Physics , 2012, DOI: 10.1103/PhysRevC.85.054907
Abstract: The single-freeze-out model with parametrized hypersurface and flow geometry is employed to analyze the transverse-momentum spectra of hadrons produced in the Pb+Pb collisions at the collision energy of {$\sqrt{s_{\rm NN}}=2.76$ TeV} at the CERN Large Hadron Collider (LHC). With the notable exception for protons and antiprotons, we find a very good agreement between the model results and the data for the measured hadron species. The additional analysis of the HBT radii of pions helps us to select, from several different types of freeze-out studied in this work, the most realistic form of the freeze-out hypersurface. We find that discrepancy ratio between the model and experiment for the proton/antiproton spectra depends on $p_T$, dropping from 2 in the soft region to 1 around $p_T=1.5$ GeV.
Image Acquisition in an Underwater Vision System with NIR and VIS Illumination
Wojciech Biegański,Andrzej Kasiński
Computer Science , 2014,
Abstract: The paper describes the image acquisition system able to capture images in two separated bands of light, used to underwater autonomous navigation. The channels are: the visible light spectrum and near infrared spectrum. The characteristics of natural, underwater environment were also described together with the process of the underwater image creation. The results of an experiment with comparison of selected images acquired in these channels are discussed.
Hybrid external fixation for neglected fractures of the distal radius: results after one year
Pawe Grala,Wojciech Zieliński
Journal of Orthopaedics and Traumatology , 2008, DOI: 10.1007/s10195-008-0023-5
Abstract: Hybrid external fixation of neglected distal radial fractures results in good outcomes if care is taken to prevent overdistraction of bone fragments.
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