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Search results for: STANDARD BREEAM
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Effect of mesh deformation on the accuracy of 3D FEM electromagnetic analysis
PublicationIn this paper, the accuracy of 3D FEM electromagnetic simulations in parametric analysis using mesh deformation techniques is discussed. Mesh deformation techniques allow one to preserve the mesh topology while the geometry is changed. It is shown that the application of mesh deformation can provide accurate simulation results even for very large deformations. On the other hand, it is also shown that the technique has to be used...
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Note on the variance of the sum of gaussian functonals
PublicationDowodzi się oszacowania wariancji sum funkcjonałów losowych, konstruowanych dla zależnego ciągu gaussowskiego.Let (Xi; i = 1; 2; : : :) be a Gaussian sequence with Xi 2 N(0; 1) for each i and suppose its correlation matrix R = (ij)i;j1 is the matrix of some linear operator R : l2 ! l2. Then for fi 2 L 2(), i = 1; 2; : : : ; where is the standard normal distribution, we estimate the variation of the sum of the Gaussian functionals...
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Intelligent turbogenerator controller based on artifical neural network
PublicationThe paper presents a desing of an intelligent controller based on neural network (ICNN). The ICNN ensures at the same time two fundamental functions : the maintaining of generator voltage at the desired value and the damping of the electromechanical oscillations. Its performance is evaluted on a single machine infinite bus power system through computer simulations. The dynamic and transient operation of the proposed controller...
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Selected problems of experimental investigation of dynamically loaded journal bearings
PublicationIn the paper some problems concerning relations between external bearing loadings and critical lining stresses are described for test stand with rotating load vector. According to the standard ISO 7905/1 this type of test stand, for dynamically loaded slide bearing, is recommended as a basic research unit for material testing in a complete bearing unit. The lining stress calculation results occurred being dependent on applied calculation...
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Zasilanie urządzeń sieci Ethernet przez kable transmisyjne
PublicationW roku 2003 komitet IEEE zatwierdził standard 802.3af (PoE) specyfikujący zasady zasilania urządzeń końcowych przez standardowe kable ethernetowe. W roku 2008 ma zostać zatwierdzona nowa wersja PoE, tzw. PoE Plus (IEEE 802.3at). W pracy omówiono zasady zasilania urządzeń proponowane w standardzie PoE, wskazano na ograniczenia wprowadzone przez IEEE 802.3af, przedstawiono podstawowe rozszerzenia proponowane w nowym rozwiązaniu PoE...
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GSM Cordless Telephony System - perspektywa rozwoju transmisji danych w systemie GSM.
PublicationW artykule opisano nowy standard systemu telefonii bezprzewodowej, znanego pod nazwą GSM -CTS (ang. GSM - Cordless Telephony System), w pełni zintegrowanego z systemem GSM. Przedstawiono podstawowe charakterystyki omawianego systemu, tzn. jego architekturę, zasadę działania, właściwości interfejsu radiowego oraz rodzaje oferowanych usług. W referacie zostały omówione perspektywy rozwoju systemu, ze szczególnym uwzględnieniem możliwości...
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Wideband Model Order Reduction for Macromodels in Finite Element Method
PublicationAbstract: This paper presents a novel algorithm for accelerating 3D Finite Element Method simulations by introducing macromodels created in local model order reduction in the selected subdomains of the computational domain. It generates the projection basis for a compact system of equations associated with a separate subdomain. Due to non-linear frequency dependency in the Right Hand Side (RHS), the standard reduction methods do...
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Cavitation Erosion of P110 Steel in Different Drilling Muds
PublicationThe P110 steel specimens were subjected to ultrasonic cavitation erosion in different compositions of drilling muds and surfactant additive. The test procedure was based on ASTM-G-32 standard recommendations. API 5CT-P110 steel is used for pipes in oil and gas industry. The harsh environment and high velocity of flows poses corrosive and erosive threat on materials used there. The composition of drilling fluid influences its rheological...
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EXHAUST TEMPERATURE MEASUREMENTS OF THE MARINE TURBOCHARGED DIESEL ENGINES IN OPERATION
PublicationThe article presents the selected metrology issues concerning the exhaust temperature of the turbocharged marine engines during operation. The special concern has been paid on existing disturbances as well as thermodynamical interpretation of the recorded measurement signal. A diagnostic informativeness of the standard exhaust temperature’s measurements has worked out while the engine runs in steady states has been also considered...
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A study on the protection of methionine and the reduction of methionine sulfoxide in methionine-containing analogues of the growth-modeling factor Gly-His-Lys
PublicationThe protection of methionine and the reduction of methionine sulfoxide in methionine-containing analogues of Gly-His-Lys are described. The peptides were synthesized by a solid-phase method using the standard Fmoc procedure. Simultaneous deprotection of the peptide side chain and liberation from the resin were achieved using an appropriate TFA cocktail. The TFA cocktail was selected to minimize oxidation of the methionine residue....
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CLASSIFICATION OF RESTRAINTS IN THE OPTIMIZATION PROBLEM OF A COLD-FORMED PROFILE
PublicationThis work describes the restraints in the optimization problem. This is an important and complicated issue because it requires taking into account a vast range of information related to the design and production. In order to describe the relations of a specific optimization problem, it is essential to adopt appropriate criteria and to collect information on all kinds of restraints, i.e. boundary conditions. The following paper...
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Electoral support for extreme right-wing parties: A sub-national analysis of western European elections
PublicationThis paper addresses two major limitations of cross-national research on electoral support for extreme right parties (ERPs) in western Europe: its almost exclusive focus on national-level data and its failure to examine the role of the social welfare state and social capital. We employ Tobit I estimations in an additive and interactive model and compute conditional coefficients and standard errors for several interactive variables....
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Relacje w edukacyjnym kształtowaniu teorii i praktyki inżynierskiej
PublicationRozważono wzajemne zależności i współdziałanie pomiędzy teorią i praktyką w kształtowaniu zawodowej działalności inżynierów - zakładając, że teoria jest równoznaczna z kreatywnym myśleniem. Aby móc wykształcić intelektualnie dojrzałych ludzi techniki, niezbędna jest edukacja respektująca wysokie standardy wykształcenia ogólnego.
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Inteligentny budynek - obecne technologie i kierunki rozwoju
PublicationW artykule przedstawiono aktualne technologie stosowane podczas realizacji systemów automatyki budynku i nowoczesnych instalacji elektrycznych w nowoczesnych budynkach. Omówiono podstawowe funkcje tych systemów oraz korzyści wynikające z ich stosowania. Przedstawiono najpopularniejsze standardy oraz zaprezentowano przewidywane kierunki rozwoju.
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Rola fragmentów wyodrębnionych w języku UML 2
PublicationPrzedmiotem rozważań zaprezentowanych w niniejszej publikacji są zmiany oraz udoskonalenia związane z superstrukturą języka UML, wprowadzone wraz z wersją 2.0 tego standardu. W odróżnieniu od modyfikacji poczynionych w ramach poprzednich rewizji języka, zakres udoskonaleń związanych z przejściem pomiędzy wersjami 1.5 oraz 2.0 określić należy jako znaczny. W niniejszym referacie skoncentrowano się na jednej, ale bardzo znaczącej...
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A Developer's View of Application Servers Interoperability
PublicationThe paper describes analysis of application servers interoperability that considers both the available level of integration and the required level of development complexity. Development complexity ranges from simple GUI operations to changes of undocumented features in configuration files. We verify if an integration can be established on a given level of development complexity, rather than verify if it is objectively feasible....
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Analysis of unsteady flow forces on the thermowell of steam temperature sensor
PublicationIn this paper, 3D numerical analysis of unsteady flow forces acting on the measuring sheath of steam temperature is presented. According to that purpose, the CFD (Computation Fluid Dynamic [1]) approach has been used. The nonstationary of fluid acting on the measuring sheath such as: Strouhal frequency, amplitude of pressure, structure of vortex, peak of pressure, field of pressure, field of velocity etc. are studied analytically...
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Modeling of traffic safety indictors on Polish national road network
PublicationAlthough decreased from 2001 to 2013, Poland’s road deaths improved at a slower rate than the rest of the EU, leaving Poland as one of the worst road safety performing countries in the EU. The national road network in Poland, despite the dynamic transformation and development, still does not conform to the EU safety standards. Similar situation exists in other EU countries, particularly those in Central and Eastern Europe. Safety...
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Radio Channel Measurements in Off-Body Communications in a Ferry Passenger Cabin
PublicationThis paper presents an off-body radio channel measurements in a ferry passenger cabin at 2.45 GHz band, for static sleeping scenarios with different body orientation and on-body antennas placements, and also for upper and lower sleeping berths. The measurements have been performed with two types of on-body wearable receiving antennas: FlexPIFA (flexible planar inverted F antenna), and FlexNotch (flexible adhesive-backed notch antenna)...
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Novel ABTS-dot-blot method for the assessment of antioxidant properties of food packaging
PublicationThe new ABTS-dot-blot method for the direct determination of antioxidant activity of active packaging that is in contact with foodstuffs has been developed. The usefulness of the new method was verified with the use of agarose, pork gelatin, bacterial cellulose and cellulose-chitosan films with incorporated standard antioxidant – Trolox or plant phytochemicals derived from three types of berry juices (chokeberry, blue-berried honeysuckle,...
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Temperature influence on tyre/road noise on poroelastic road surface based on laboratory measurements
PublicationThe temperature effect on measured tyre/road noise is very important phenomena as it may lead to significant errors in measurement results due to substantial influence of this parameter on the obtained values. It depends mainly on the particular tyre-road combination. It is different for dense and porous as well as for bituminous and cement concrete pavements. It differs also depending on tested tyre. The correction procedure for...
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Application of a commercially available derivatization instrument and commonly used reagents to HPLC on-line determination of antioxidants
PublicationThis study demonstrates the potential of a commercially available derivatization instrument coupled with HPLC for separation and on-line determination of antioxidants detected with widely used screening reagents - DPPH (2,2-diphenyl-1-picrylhydrazyl), ABTS (2,2'-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid) or FCR (Folin-Ciocalteu's phenol reagent ). As the result of optimization, key parameters of the analytical procedure,...
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Implementation of the Concept of Flexicurity in the Selected Countries of Central Eastern Europe
PublicationThe CEE countries have to create their own flexicurity policies which would take into account the employment policy guidelines, cultural traditions and socio-economic development. The aim of this article is to examine and evaluate the implementation of the flexicurity concept on the basis of the adopted set of composite indicators. The study covers 9 countries of the CEE region, and the research period covers the years 2007 and 2013....
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Multifaceted Analyses of Four Different Prototype Lightweight Photovoltaic Modules of Novel Structure
PublicationDynamic growth of photovoltaic capacity in Poland encourages many entities to invest in photovoltaic systems. However, in the case of buildings with low roof-bearing capacity it can be problematic or even impossible to mount conventional PV modules due to their relatively high weight. Hence, the use of lightweight PV modules is a potential solution. In this paper four different prototype silicon lightweight modules of novel structure...
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Determination of rectification corrections for semi gantry crane rail axes in the local 3D coordinate system
PublicationElectronic tacheometers are currently the standard instruments used in geodetic work, including also geodetic engineering measurements. The main advantage connected with this equipment is among others high accuracy of the measurement and thus high accuracy of the final determinations represented for example by the points’ coordinates. One of many applications of the tacheometers is the measurement of crane rail axes. This measurement...
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Influence and development of new kinematic systems in flat surface lapping
PublicationThe face grinding and lapping technology is widely used in the field of the precise and ultraprecise manufacturing. It has become an indispensable technology in the manufacture of many parts. An absence of material restrictions allows machining both metal and non-metallic materials, including technical ceramics [1]. Nowadays there are mainly two kinematic systems in lapping machines [2]. The machining plane-parallel surfaces is...
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Using On-line Measurement by Electronic Nose and Computer Simulations for Real-time Control at WWTP
PublicationContinuous investigation of wastewater quality can be carried out by a device called an e-nose. One important feature of the proposed real-time control system for WWTP is that using on-line measurements by e-nose together (Figure 1) with technological sets picked on this basis by means of computer models, it is possible to change treatment process parameters, depending on the current quality of wastewater. It can be used for the...
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Application of Ontology In the ITIL Domain
PublicationBusiness standards tend to be less formal in description then strict technical norms. Authors of this chapter suggest applying ontological description (powered by the capabilities of the OWL language) to express Information Technology Infrastructure Library (ITIL). One of the goals of this initial study is to determine the usefulness of such semantic model in organizations that adopted or plan to adopt ITIL.
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Ścieki pod ciśnieniem. Przepompownie kanalizacyjne.
PublicationProblemy związane z przepompowniami ścieków. Rodzaje obiektów. Bezpieczeństwo techniczne i energetyczne. Problem braku aktualnych standardów.
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Czynniki warunkujące wybór standardowej wysokości modernizowanych peronów osobowych na sieci PKP PLK S.A.
PublicationPrzedstawiono czynniki decydujące o doborze odpowiedniej wysokości peronów na modernizowanych liniach kolejowych w Polsce. Przedstawione czynniki uwzględniają najważniejsze - zdaniem Autorów - zagadnienia, jakimi są obowiązujące normatywy dotyczące infrastruktury i taboru, względy ergonomiczne i ekonomiczne oraz europejskie standardy budowy peronów osobowych.
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Re:Brick, czyli budowanie z małych elementów
PublicationArtukuł opisuje problematykę aktywizowania działań łaczacych różne podmioty (studenci architektury i innych kierunków, praktykujący architekci, organizacje społeczne, administracja) mających przyczynić się podniesienia walorów architektonicznych i standardu zamieszkiwania w historycznych dzielnicach Gdańska (Dolne Miasto, Nowy Port, Biskupia Górka, Dolny Wrzeszcz).
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Praktyka wykonywania pomiarów instalacji fotowoltaicznych prowadząca do określenia rzeczywistego stanu technicznego
PublicationPraca przedstawia zasady wykonywania pomiarów instalacji fotowoltaicznych wg normy PN-EN 62446-1. Proponowany w normie zakres podstawowy pozwala tylko na ocenę bezpieczeństwa pracy instalacji. Dopiero zakres dodatkowy umożliwia uzyskanie informacji o referencyjnych mocach zainstalowanej elektrowni, jej sprawności, a nawet jednorodności poszczególnych ogniw fotowoltaicznych. Załączone przykłady pomiarów czystych i zabrudzonych paneli...
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Biblioteki cyfrowe budowane w oparciu o oprogramowanie JeromeDL
PublicationOmówiono podstawowe możliwości JeromeDL, oprogramowania do budowy bibliotek cyfrowych, stosującego rozwiązania sieci semantycznych (RDF, DublinCore) oraz standardy biblioteczne (MARC21, BibTeX). Przedstawiono mpraktyczne zastosowaniaoprogramowania JeromeDL do tworzenia bibliotek cyfrowych w Bibliotece Głównej Politechniki Gdańskiej (WBSS PG) i Bibliotece Głównej Politechniki Warszawskiej.
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Reliability-Based Stability Analysis of a Baltic Cliff by the Combined Response Surface Method
PublicationA simple, straightforward computational procedure was proposed, incorporating the Response Surface Method (RSM) linked with the standard Monte Carlo (MC) simulation method and the Point Estimate Method (PEM). PEM samples make it possible to analyse the sensitivity of the cliff’s stability to variation in subsoil parameters and to reduce the number of random variables of the problem. The proposed methods were tested in two cases:...
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Intercomparison of TEC obtained from the IRI model to the one derived from GPS measurements
PublicationIRI (International Reference Ionosphere) is a well-known standard of the ionosphere, but nowadays GPS permanent observations are also the base of the regional and global ionosphere models. In this paper, comparison of TEC (Total Electron Content) derived from the IRI model to the global TEC parameters derived from GPS measurements is presented. Global TEC maps show, that GPS derived ionosphere models, in opposition to the IRI,...
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SUBIEKTYWNA OCENA MULTIPLEKSU RADIOFONII LOKALNEJ DAB+ DZIAŁAJĄCEJ W GDAŃSKU I WROCŁAWIU
PublicationStandard DAB+ (Digital Audio Broadcasting plus) jest wiodącym systemem naziemnej radiofonii cyfrowej. W porównaniu do analogowej radiofonii FM wszystkie usługi, obejmujące tradycyjne programy radiowe oraz usługi transmisji danych, grupowane są w zbiór (ensemble). Praca ta przedstawia proces rekonfiguracji polskiego multipleksu na przykładzie lokalnej radiofonii DAB+ w Gdańsku i Wrocławiu. Opisuje wyniki badań subiektywnych dotyczących...
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Solving the Problem of Dynamic Adaptability of Artificial Intelligence Systems that Control Dynamic Technical Objects
PublicationThis paper investigates the increase in the response speed and stability of artificial intelligence systems that control dynamic technical objects. The problem of calculating the optimal time of switching an artificial intelligence system between software classes by the criterion of the rigidity degree of the model of a control object is considered. The solution of this problem is proposed for the general case of the control object...
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Emulator and simulator of Terma SCANTER and ARPA radar data server
PublicationThe software solutions presented in this paper generate real-time data compatible with ARPA radar standard as well as Terma SCANTER 2001 radar cooperating with Video Distribution and Tracking (VDT) server. Two different approaches to this problem are considered: emulation based on the data captured from real devices and simulation of objects on the sea. For both of them architecture, implementation details and functional test results...
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An Improvement of Global Complex Roots and Poles Finding Algorithm for Propagation and Radiation Problems
PublicationAn improvement of the recently developed global roots finding algorithm has been proposed. The modification allows to shorten the computational time by reducing the number of function calls. Moreover, both versions of the algorithms (standard and modified) have been tested for numerically defined functions obtained from spectral domain approach and field matching method. The tests have been performed for three simple microwave...
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TRANSMISJA GŁOSOWYCH KOMUNIKATÓW DROGOWYCH W RADIOFONII CYFROWEJ DAB+
PublicationProces cyfryzacji radia jest nowym rozdziałem w historii radiofonii. Wiele rekomendacji i badań naukowych wskazuje na standard DAB+ (Digital Audio Broadcasting plus), który w niedalekiej przyszłości ma zastąpić analogową radiofonię FM. Ten system cyfrowy wprowadza wiele zmian, oferując przy tym lepszą jakość dźwięku oraz szereg usług dodatkowych. W pracy postanowiono zbadać minimalną wymaganą przepływność bitową potrzebną do transmisji...
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A Three-Step Approach to Estimation of Reduction Potentials of Natural Mixtures of Antioxidants Based on DPPH Test; Illustration for Catechins and Cocoa
PublicationThe aim of this study is to propose a methodology to assess electrochemical properties of complex mixtures of antioxidants, such as plant extracts, based on the results of simple and popular DPPH test. The first, most difficult step, involves determinations of standard reduction potentials (E0) for the series of purified compounds (here catechins). The next step is the calculation of stoichiometric values (n10) based on the results...
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ANALYSIS OF THE POSSIBILITIES OF HIGH SPEED SHAFT BEARING SYSTEM DURABILITY INCREASE
PublicationDuring the operation of wind turbines with a gearbox of traditional configuration, a high failure rate of high-speed shaft bearings is observed. Such a high failures frequency is not reflected in standard bearing durability calculation methods, which can be attributed to atypical failure mechanism. To avoid observed problems in the 1.5 MW wind turbine, the modification of the existing bearing system is proposed. Multiple options,...
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A non-uniform real-time speech time-scale stretching method
PublicationAn algorithm for non-uniform real-time speech stretching is presented. It provides a combination of typical SOLA algorithm (Synchronous Overlap and Add ) with the vowels, consonants and silence detectors. Based on the information about the content and the estimated value of the rate of speech (ROS), the algorithm adapts the scaling factor value. The ability of real-time speech stretching and the resultant quality of voice were...
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External Validation Measures for Nested Clustering of Text Documents
PublicationAbstract. This article handles the problem of validating the results of nested (as opposed to "flat") clusterings. It shows that standard external validation indices used for partitioning clustering validation, like Rand statistics, Hubert Γ statistic or F-measure are not applicable in nested clustering cases. Additionally to the work, where F-measure was adopted to hierarchical classification as hF-measure, here some methods to...
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Diagnostyka molekularna w zakażeniach szpitalnych
PublicationOpisano najczęściej wykorzystywane techniki genotypowania w badaniach zakażeń szpitalnych z uwzględnieniem ich powtarzalności i potencjału różnicującego oraz problemów technicznych i ponoszonych kosztów. Makrorestrykcyjna analiza genomowego DNA z wykorzystaniem PFGE (ang. Pulsed Field Gel Electrophoresis)jest uważana za ''złoty standard'' w typowaniu molekularnym. Jednak jest ona czasochłonna, pracochłonna i dlatego nie nadaje...
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Fatigue resistance investigation of the IC engine MB11 bearings, working under conditions of dynamic unidirectional loadings
PublicationThe slide bearing material MB11 fatigue resistance has been investigated with the application of SMOK - test stand in which dynamic unidirectional loadings to the test bearing is generated. Slide bearing layer consists of the bronze MB11 ( Cu Pb22 Sn 3 ) sintered to the steel shell. Each of the tested bearing has been subject to the standard 20-hour test, under conditions of the full fluid lubrication. Methodology of the experiments,...
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Indykatory dla modelu społeczeństwa informacyjnego.
PublicationW dobie postępującej informatyzacji, w czasach nazywanych często trzecią rewolucją technologiczną, synonimem ich jest społeczeństwo informacyjne IS (Information Society). Najpopularniejszy obecnie sposób, służący do szeregowania społeczeństw według ich stopnia rozwoju, jest oparty na HDI (Human Development Index). HDI jest wyliczany jako kombinacja trzech wyznaczników: longevity, knowledge, and a decent standard of living. Postanowiono,...
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Analiza składu kwasów tłuszczowych frakcji WKT wyizolowanej z produktów przeestryfikowania enzymatycznego wysokotopliwej frakcji tłuszczu mlecznego olejem słonecznikowym
PublicationOpracowano metodę ilościowego oznaczania kwasów tłuszczowych występujących w WKT mieszaniny poreakcyjnej. Substratem były frakcje WKT pochodzące z produktów enzymatycznego przeestryfikowania frakcji tłuszczu mlecznego i oleju słonecznikowego, w obecności Lipozyme RM IM. Frakcje te izolowano z produktu metodą preparatywnej CCW i przeprowadzano w estry metylowe, stosują jako katalizator SOCl2. Otrzymane estry analizowano metodą chromatografii...
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Surface quality control of a thin SiN layer by optical measurements
PublicationFiber optic interferometers have a wide range of applications, including biological and chemical measurements. Nevertheless, in the case of a reflective interferometer setup, standard silver mirrors cannot be used in every measurement, due to their chemical activity. This work investigates the surface quality of a thin optical layer of silicon nitride (SiN), which can serve as an alternative material for silver mirrors. We present...
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Binary-Encounter Model for Direct Ionization of Molecules by Positron-Impact
PublicationWe introduce two models for the computation of direct ionization cross sections by positron impact over a wide range of collision energies. The models are based on the binary-encounter-Bethe model and take into account an extension of the Wannier theory. The cross sections computed with these models show good agreement with experimental data. The extensions improve the agreement between theory and experiment for collision energies...