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An Analysis of Sustainability Reporting Practices of the Global Airline Industry
PublikacjaSustainability reporting (SR) has become a standard practice for many organisations worldwide. The purpose of this paper is to explore and develop our understanding of the global airline industry’s SR practices. Content analysis was employed to map which reporting frameworks the global commercial airline industry has recently used to report their non-financial impacts. Additionally, comparisons were made in the application of SR...
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Dane geoprzestrzenne w taksacji nieruchomości : koncepcja uproszczonej metody badania aktualności i prezentacji danych geoprzestrzennych na przykładzie taksacji nieruchomości
PublikacjaJednym z najważniejszych zadań związanych z geodezją, a w szczególności z taksacją nieruchomości, jest zbieranie danych o nieruchomościach. W takim przypadku powinny to być dane - atrybuty, które mają największy wpływ na jej wartość i najlepiej opisują nieruchomość. Powinny także charakteryzować się aktualnością, gdyż ta cecha, jako jedna z wielu, warunkuje uzyskanie wiarygodnych wyników - wartości nieruchomości. Zapewnienie jej...
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MPPT control - a way to the maximization of energy amount obtained from the PV module
PublikacjaW układzie MPPT (Maximum Power Point Tracking) poziom mocy maksymalnej jest dynamicznie śledzony dla różnych poziomów napromieniowania i temperatur przy użyciu pamięci, zaprojektowanej jako sterowany mikroprocesorem moduł. Zastosowany algorytm w sposób ciągły poszukuje maksymalnej wartości mocy podawanej ze źródła (modułów PV) oraz pobieranej przez obciążenie. Napięcie wyjściowe z układu MPPT zależy od aktualnych warunków, w jakich...
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Ocena jakości powietrza atmosferycznego na terenie Aglomeracji Trojmiejskiej = Quality of atmospheric air in the Tricity area
PublikacjaNa terenie Aglomeracji Trójmiejskiej i Tczewa monitoring jakości powietrza prowadzony jest, obok jednostek samorządowych przez fundację: Agencja Monitoringu Regionalnego Atmosfery Aglomeracji Gdańskiej - ARMAAG. Katedra Chemii Analitycznej PG współpracując z fundacją ARMAAG podjęła próbę uzupełnienia informacji na temat stanu atmosfery na terenie Trójmiasta i Tczewa o ocenę pod względem zawartości analitów z grupy BTEX. Celem...
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Klasyfikacja segmentów obrazu na litery i nielitery
PublikacjaArtykuł przedstawia metody oceny podobieństwa figur do liter opracowane dla potrzeb urządzenia do lokalizacji i odczytu napisów z przeznaczeniem dla osób niewidomych. Ocena dotyczy kształtów segmentów znajdowanych na obrazie zawierającym potencjalny tekst (np. witryna sklepu, drzwi z wizytówką, autobus z numerem linii). Celem tej oceny jest wyodrębnienie segmentów obrazu reprezentujących tekst i przekazanie ich do systemu rozpoznawania...
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Therapeutic intervention by the simultaneous inhibition of DNA repair and type I or type II DNA topoisomerases: one strategy, many outcomes
PublikacjaMany anticancer drugs reduce the integrity of DNA, forming strand breaks. This can cause mutations and cancer or cell death if the lesions are not repaired. Interestingly, DNA repair-deficient cancer cells (e.g., those with BRCA1/2 mutations) have been shown to exhibit increased sensitivity to chemotherapy. Based on this observation, a new therapeutic approach termed 'synthetic lethality' has been developed, in which radiation...
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SURFACTANTS IN KLODNICA RIVER (KATOWICE, POLAND). PART II. QUATERNARY AMMONIUM COMPOUNDS
PublikacjaThe paper presents methods of determination of analytes of the cation group (alkyl benzyl dimethyl ammonium (BDDA-C12-C16), alkyl trimethyl ammonium (TMA), hexadecyl piridinium (HP)) in surface water and bottom sediment samples. In the sample preparation phase the solid phase extraction (SPE) or accelerated solvent extraction/ultrasound assisted extraction (ASE/UAE)-SPE technique was used and in the identification phase and quantitative...
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Method for Assessing Rail Transport Competitiveness in Poland and the United Kingdom
PublikacjaBoth in Poland and United Kingdom, as well as worldwide, railways have to compete with other modes of transport, and the rail industry seeks for possibilities of achieving a competitive advantage over them. Thus, there is a need for methods for assessment of rail transport competitiveness and detection of areas for improvement. This paper presents a method developed for the Polish regional transport market and verified according...
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A method of selecting light sources from night satellite scenes
PublikacjaSatellite images carries a lot of data. Very sophisticated methods of analyses may reveal very complicated nature of the observed objects. In case of night images, lights play the role of information sources. In this paper we would like to present results of the research aimed to describe light sources from satellite night images by providing description of their luminosity. The authors point source imaging data from the satellite...
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Global Competitiveness and Economic Growth: A One-Way or Two-Way Relationship?
PublikacjaThe Global Competitiveness Index is treated as a standard to measure the competitiveness of countries. Leaders look at it to make policy and resource allocation decisions because global competitiveness is expected to be related to economic growth. However, studies which analyze the empirical relationship between these two economic categories are very rare. It is still an open question in the literature whether economic growth can...
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"Creating a numerical model of noise conditions based on the analysis of traffic volume changes in cities with low and medium structure.
PublikacjaThe subject of this research study is to analyze noise conditions of the selected area in the city of Gdańsk using data related to traffic volume changes during a day. This is because daily distribution of noise levels is much more helpful for noise control and reduction than traditional maps with Lden levels indicated. Calculations are made with the use of a numerical model developed at the Gdansk Univ. of Technology and implemented...
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"Creating a numerical model of noise conditions based on the analysis of traffic volume changes in cities with low and medium structure.
PublikacjaThe subject of this research study is to analyze noise conditions of the selected area in the city of Gdańsk using data related to traffic volume changes during a day. This is because daily distribution of noise levels is much more helpful for noise control and reduction than traditional maps with Lden levels indicated. Calculations are made with the use of a numerical model developed at the Gdansk Univ. of Technology and implemented...
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Numerical modelling of the mesofracture process of sintered 316L steel under tension using microtomography
PublikacjaThis paper concerns numerical modelling of the deformation process, taking into account the local fracture of porous 316L sinters at the mesoscopic scale using the finite element method. Calculations are performed with the use of geometrical models, to map the realistic shape of the porous mesostructure of the material, obtained by means of computed microtomography. The microtomographic device has limited and insufficient measurement...
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Influence of User Mobility and Antenna Placement on System Loss in B2B Networks
PublikacjaIn this paper, the influence of user mobility and on-body antenna placement on system loss in body-to-body communications in indoor and outdoor environments and different mobility scenarios is studied, based on system loss measurements at 2.45 GHz. The novelty of this work lies on the proposal of a classification model to characterise the effect of user mobility and path visibility on system loss, allowing to identify the best...
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Upgrading low value-added activities in global value chains: a functional specialisation approach
PublikacjaThis paper aims to identify patterns of functional specialisation (FS) in global value chains (GVCs) and determinants of upgrading them for selected Central Eastern European (CEE) economies. By combing the World Input-Output Database with data on occupations, we reveal a new FS pattern among subgroups of CEEs. Poland and Slovakia have an unfavourable GVC position and specialise in low value-added fabrication function. In contrast,...
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Performance and Energy Aware Training of a Deep Neural Network in a Multi-GPU Environment with Power Capping
PublikacjaIn this paper we demonstrate that it is possible to obtain considerable improvement of performance and energy aware metrics for training of deep neural networks using a modern parallel multi-GPU system, by enforcing selected, non-default power caps on the GPUs. We measure the power and energy consumption of the whole node using a professional, certified hardware power meter. For a high performance workstation with 8 GPUs, we were...
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Intelligent system for environmental noise monitoring.
PublikacjaW rozdziale przedstawiono projekt i realizację automatycznej stacji monitorowania hałasu środowiskowego. Stanowi ona jeden z elementów tworzonego w Katedrze Systemów Multimedialnych Politechniki Gdańskiej Multimedialnego Systemu Monitorowania Hałasu. Przedstawiono ogólną budowę stacji pomiarowej oraz omówiono jej podstawową funkcjonalność. Obszerniej opisano dodatkowe możliwości stacji, do których należą: komunikacja z wykorzystaniem...
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Właściwości glikolizatów oraz zsyntezowanych z nich poliuretanów
PublikacjaCelem pracy było otrzymanie glikolizatów, jako półproduktów do syntezy poliuretanów. Glikolizaty otrzymywano w reakcji odpadowej miękkiej pianki poliuretanowej (PU) z glikolem butylenowym (GB) przy stosunkach GB : PU wynoszących 2:1, 1:1, 1:2, 1:5, 1:8 i 1:10. W reakcji stosowano katalizatory metaloorganiczne. Otrzymane związki scharakteryzowano poprzez oznaczenie lepkości (wiskozymetrem Brookfield'a), gęstości (piknometrem)...
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Projekt i realizacja automatycznej stacji monitorowania hałasu środowiskowego
PublikacjaW referacie przedstawiono projekt i realizację automatycznej stacji monitorowania hałasu środowiskowego. Stanowi ona jeden z elementów tworzonego w Katedrze Systemów Multimedialnych Politechniki Gdańskiej Multimedialnego Systemu Monitorowania Hałasu. Przedstawiono ogólną budowę stacji pomiarowej oraz omówiono jej podstawową funkcjonalność. Obszerniej opisano dodatkowe możliwości stacji, do których należą: komunikacja z wykorzystaniem...
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Self-assembly of secondary aryl amides in cocrystals with perfluoroaryl coformers: structural analysis and synthon preferences
PublikacjaCooperation of aryl⋯perfluoroaryl stacking interactions and hydrogen bonds was utilized in the construction of six novel cocrystals of aromatic cis-amides with pentafluorobenzoic acid (pfba) and pentafluorophenol (pfp). They were obtained by crystallization from solution and structurally characterized. In four instances, the components form heterotetrameric motifs, in which amide:amide homodimer interacts symmetrically on two sides...
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Mask Detection and Classification in Thermal Face Images
PublikacjaFace masks are recommended to reduce the transmission of many viruses, especially SARS-CoV-2. Therefore, the automatic detection of whether there is a mask on the face, what type of mask is worn, and how it is worn is an important research topic. In this work, the use of thermal imaging was considered to analyze the possibility of detecting (localizing) a mask on the face, as well as to check whether it is possible to classify...
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A fast start-up of the organotrophic anammox process inoculated with constructed wetland sediment
PublikacjaOrganotrophic anaerobic ammonium oxidation (anammox) bacteria can utilize small volatile fatty acids with nitrate as electron acceptors with less energy consumption and no biomass production. To achieve a faster and stable start-up of organotrophic anammox process, in this study, the growth of organotrophic anammox bacteria seeded from hybrid constructed wetland (CW) sediment under different TOC/TN ratios and different chloramphenicol...
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Using water sources extent during inundation as a reliable predictor for vegetation zonation in a natural wetland floodplain
PublikacjaDistinctive zones of inundation water during floods were shown to originate from different sources in some major floodplains around the world. Recent research showed that the zonation of water in rivers and floodplains is related to vegetation patterns. In spite of this, water source zones were not used for vegetation modeling due to difficulties in their delineation. In this study, we used simulation results of a fully-coupled...
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Syntheses, chemical strustures and properties of poly(ester-etherurethane)s crosslinked with styrene, synthesized from unsaturated oligo(alkylene ester-ether)diols and 4,4'-diphenylmethane diisocyanate
PublikacjaMetodą dwuetapową, w reakcji syntezy wytworzonych uprzednio oligo(alkilenoestro-etero)dioli (OAEE) z 4,4'-diizocyjanianem difenylometanu (MDI) otrzymano nowe nienasycone poli(estro-eterouretany) (NPEEUR), które następnie poddano sieciowaniu styrenem wobec inicjatorów polimeryzacji rodnikowej: nadtlenku metyloetyloketonu (MEKPO) i 2-etylocykloheksanianu kobaltu (EtHCo). Usieciowane PEEUR scharakteryzowano na podstawie badań wytrzymałości...
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Price convergence in the EU-an aggregate and disaggregate approach
PublikacjaThis article examines the price dispersion in the European Union (EU) over 15 years (1990-2005). An extensive overview of the literature offers inconclusive results with the half-lives of price shocks from 2.8 to 282 months. Until now, most of the empirical research has been either micro or macro based. In contrast, we conducted a complex analysis utilizing both aggregate and disaggregate price data. The macro approach is based...
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Przestrzenne modelowanie i analiza elementów infrastruktur krytycznych w kontekście badania propagacji zagrożeń na terenie miasta Gdańska
PublikacjaArtykuł omawia wyniki badań nad metodami przestrzennych analiz zagrożeń terrorystycznych na terenie miasta Gdańska, przeprowadzonych w ramach współpracy pracowników Katedry Systemów Geoinformatycznych wydziału ETI PG z przedstawicielami Wydziału Zarządzania Kryzysowego i Ochrony Ludności Urzędu Miejskiego w Gdańsku. W artykule przedstawione zostały wyniki zastosowania istniejących algorytmów modelowania zagrożeń atakiem bombowym...
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Applying molecular dynamics simulation to take the fracture fingerprint of polycrystalline SiC nanosheets
PublikacjaGraphene-like nanosheets are the key elements of advanced materials and systems. The mechanical behavior of the structurally perfect 2D nanostructures is well documented, but that of polycrystalline ones is less understood. Herein, we applied molecular dynamics simulation (MDS) to take the fracture fingerprint of polycrystalline SiC nanosheets (PSiCNS), where monocrystalline SiC nanosheets (MSiCNS) was the reference nanosheet....
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GROWTH AND STRUCTURAL CHANGES IN TRANSITION COUNTRIES: THE CHICKEN OR THE EGG?
PublikacjaThe objective of this study is to test empirically the relationship between structural changes (changes in gross value added and employment) and economic growth. We used a panel Granger-causality analysis based on annual data for eight transition countries, covering the period 1995–2011. The main finding is that the causality relations analysed are heterogeneous processes and are identified more often...
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Enhanced Toxicity of Bisphenols Together with UV Filters in Water: Identification of Synergy and Antagonism in Three-Component Mixtures
PublikacjaContaminants of emerging concern (CEC) localize in the biome in variable combinations of complex mixtures that are often environmentally persistent, bioaccumulate and biomagnify, prompting a need for extensive monitoring. Many cosmetics include UV filters that are listed as CECs, such as benzophenone derivatives (oxybenzone, OXYB), cinnamates (2-ethylhexyl 4-methoxycinnamate, EMC) and camphor derivatives (4-methylbenzylidene-camphor,...
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Bisphenols (A, S, and F) affect the basic hormonal activity determined for pharmaceuticals – Study of Saccharomyces cerevisiae
PublikacjaPharmaceuticals and analogs of bisphenol A (BPA) are increasingly threatening environmental pollutants. In this study, mixtures of selected pharmaceuticals (diclofenac sodium salt, chloramphenicol, oxytetracycline hydrochloride, fluoxetine hydrochloride, estrone, ketoprofen, progesterone, gemfibrozil and androstenedione) were prepared with BPA and its two analogs (namely, bisphenols F and S) at such ratios to reflect environmentally...
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Cast polyurethanes obtained from reactive recovered polyol intermediates via crude glycerine decomposition process
PublikacjaIn this work, the possibility of applying intermediates from polyurethane waste recycling in polyurethane synthesis was presented. Polyurethanes were synthesised in a two-step method using a mixture of petrochemical polyol and glycerolysate, used as a reactive component, 4,4-diphenylmethane diisocyanate (MDI) and 1,4-buthanediol (BD). Glycerolysates were produced during decomposition of polyurethane elastomer by crude glycerine...
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Synthesis, structure and properties of poly(ester-urethane)s obtained using bio-based and petrochemical1,3-propanediol and 1,4-butanediol
PublikacjaIn this paper, the poly(ester-urethane)s obtained using petrochemical and bio-based chain extenders were prepared and characterized. The influence of glycols’ origin on the chemical structure, mechanical and thermal properties of the prepared polyurethanes was studied. The materials were synthesised by prepolymer method. The first step involved the reaction of α,ω-dihydroxy(ethylene-butylene adipate (POLIOS 55/20) with 4,4’-diphenylmethane...
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Multi-agent large-scale parallel crowd simulation
PublikacjaThis paper presents design, implementation and performance results of a new modular, parallel, agent-based and large scale crowd simulation environment. A parallel application, implemented with C and MPI, was implemented and run in this parallel environment for simulation and visualization of an evacuation scenario at Gdansk University of Technology, Poland and further in the area of districts of Gdansk. The application uses a...
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Impact of selected drugs and their binary mixtures on the germination of Sorghum bicolor (sorgo) seeds
PublikacjaThe aim of this study was to assess the toxicological potential of binary drug mixtures and individual drugs under different pH conditions with different inorganic ion additions on the germination of Sorghum bicolor (sorgo) seeds. To assess whether the given drug mixtures were more phytotoxic than the individual compounds, concentration addition (CA) and independent action (IA) approaches were applied to estimate the predicted...
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Identification of synergistic and antagonistic actions of environmental pollutants: Bisphenols A, S and F in the presence of DEP, DBP, BADGE and BADGE·2HCl in three component mixtures
PublikacjaEcosystems are facing increased pressure due to the emission of many classes of emerging contaminants. However, very little is known about the interactions of these pollutants, such as bisphenols (BPs), plasticizers or pharmaceuticals. By employing bioluminescent bacteria (Microtox assay), we were able to define interactions between selected emerging pollutants (namely BPA, BPS, BPF, BADGE, BADGE·2HCl, DEP, DBP) in ternary mixtures, at...
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Cytocompatibility of stabilized black phosphorus nanosheets tailored by directly conjugated polymeric micelles for human breast cancer therapy
PublikacjaThe novel procedure of few-layer black phosphorus (FLBP) stabilization and functionalisation was here proposed. The cationic polymer PLL and non-ionic PEG have been involved into encapsulation of FLBP to allow sufficient time for further nanofabrication process and overcome environmental degradation. Two different spacer chemistry was designed to bind polymers to tumor-homing peptides. The efficiency of functionalisation was examined...
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The Design Development of the Sliding Table Saw Towards Improving Its Dynamic Properties
PublikacjaCutting wood with circular saws is a popular machining operation in the woodworking and furniture industries. In the latter sliding table saws (panel saws) are commonly used for cutting of medium density fiberboards (MDF), high density fiberboards (HDF), laminate veneer lumber (LVL), plywood and chipboards of different structures. The most demanded requirements for machine tools are accuracy and precision, which mainly depend on...
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Numerical Analysis of Mice Carotid Arteries’ Response Emphasizing the Importance of Material Law Constants’ Validation
PublikacjaIn this paper, a detailed validation of the passive material properties of mice carotid arteries and constants of the Fung and Holzapfel hyperelastic material laws is conducted by means of static nonlinear FEM analyses. The response of the carotid arteries in an inflation test is studied here for the following mouse models: wild-type, mdx, sgcd−/−, Eln+/+, Eln+/−, Fbln5+/+, and Fbln5−/−. All FEM computations are conducted on models...
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Active Kriging-based conjugate first-order reliability method for highly efficient structural reliability analysis using resample strategy
PublikacjaEfficient structural reliability analysis method is crucial to solving reliability analysis of complex structural problems. High-computational cost and low-failure probability problems greatly limit the efficiency in structural reliability analysis problems, causing the safety and reliability of the structure to be questioned. In this work, a highly efficient structural reliability analysis method coupling active Kriging algorithm...
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Zastosowanie Internetu w małej firmie
PublikacjaZnaczenie sektora małych i średnich przedsiębiorstw (MSP) rosło w okresie transformacji polskiej gospodarki i od lat utrzymuje się na tym samym, wysokim, poziomie. Niemniej zaobserwowano wysoką śmiertelność firm w tym sektorze. Możliwości przetrwania, rozwoju, czy sprostania konkurencji związane są, między innymi, z wykorzystaniem technologii informacyjnych i/ lub Internetu w prowadzeniu działalności. Z prezentowanych wyników...
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Lotne związki chlorowcoorganiczne w strumieniach ścieków i wody procesowej zakładu przemysłowego
PublikacjaLotne związki chlorowcoorganiczne ze względu na swoje właściwości toksyczne, kancerogenne, mutagenne stanowią grupę zanieczyszczeń organicznych, której chemicy analitycy poświęcają wiele uwagi. Pomimo faktu, że dostępne dane literaturowe zapewniają możliwość dokładnego opisu losu środowiskowego ksenobiotyków należących do tej grupyzwiązków, wciąż istnieje potrzeba prac badawczych w tym zakresie, jak również w zakresie określenia...
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Developmental selenium exposure and health risk in daily foodstuffs: A systematic review and meta-analysis
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Experience based knowledge representation for Internet of Things and Cyber Physical Systems with case studies
PublikacjaCyber Physical Systems and Internet of Things have grown significant attention from industry and academia during the past decade. The main reason behind this interest is the capabilities of such technologies to revolutionize human life since they appear as seamlessly integrating classical networks, networked objects and people to create more efficient environments. However, enhancing these technologies with intelligent skills becomes...
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Assessment of organic coating degradation via local impedance imaging
PublikacjaThe paper presents a new approach to organic coating condition evaluation at micrometer scale using localized impedance measurements. It is based on atomic force microscopy (AFM) in contact mode. Impedance is measured between conductive AFM tip and metal substrate covered with organic coating. A single-frequency voltage perturbation signal is applied between the electrodes and current response signal is registered. As the tip is...
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Experimental-Numerical Analysis of the Effect of Bar Diameter on Bond in Pull-Out Test
PublikacjaBar diameter is one of the basic factors affecting bond behavior, which is still of interest due to opposing opinions regarding its effect on bond behavior in the pull-out test. This paper presents an experimental and numerical bond analysis of ribbed reinforcing bar in concrete. The aim was to experimentally evaluate the effect of bar diameter on the bond behavior in the pull-out test and to perform numerical simulations of the...
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Multi-agent large-scale parallel crowd simulation with NVRAM-based distributed cache
PublikacjaThis paper presents the architecture, main components and performance results for a parallel and modu-lar agent-based environment aimed at crowd simulation. The environment allows to simulate thousandsor more agents on maps of square kilometers or more, features a modular design and incorporates non-volatile RAM (NVRAM) with a fail-safe mode that can be activated to allow to continue computationsfrom a recently analyzed state in...
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System informacji przestrzennej dla morskich rejonów przybrzeżnych. Logistyka i obronność.
PublikacjaAutorzy wskazują na możliwość poprawienia jakości zarządzania decyzjami oraz dowodzeniem na wypadek działań wojennych lub wypadków morskich poprzez jednoznaczne i metodyczne połączenie cyfrowych map morskich wykonanych w standardzie ENC/S-57 i DNC/VPF oraz danych z zasobu geodezyjnego dotyczącego obszaru lądowego. Aktualnie nie funkcjonuje w Polsce system informacji przestrzennej obejmujący polskie wybrzeże, który mógłby zostać...
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Effect of hydroxylated soybean oil and bio-based propanediol on the structure and thermal properties of synthesized bio-polyurethanes
PublikacjaThe aim of this work was to obtain bio-polyurethanes using synthetic compounds and bio-components, i.e. bio-glycols. Bio-polyurethanes were prepared by means of the prepolymer method. Prepolymers were synthesized from 4,4′-diphenylmethane diisocyanate (MDI) and a polyol mixture containing 75% by weight of commercial polyether and 25% by weight of hydroxylated soybean oils (H2 or H3), the latter being obtained in the reaction with...
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Point cloud in archaeological and historical survey
PublikacjaIn the last decade the potential of using the point clouds in archaeological research has been noted. Therefore, a number of guidelines concerning aspects of data acquisition (resolution and format) were developed. They also included the way of searching the imaged area to identify archaeological and historical cultural heritage sites. The purpose of this research was to analyze the point cloud for selected woodland survey. Forest...
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Dlaczego tak mało wiemy o wzroście małych i średnich przedsiębiorstw - subiektywizm w badaniach
PublikacjaRozwój przedsiębiorstwa jako przedmiot badań, doczekał się wielu opracowań literaturowych (patrz: Birch, Storey, Davidsson, Demar, Wiklund, Coad, Wasilczuk, Matejun itd.), jednak cały czas brakuje odpowiedzi na pytanie dlaczego małe firmy wzrastają i jakie czynniki na ten wzrost wpływają. Brak wiedzy na ten temat nie wynika z braku chęci badawczych, a raczej z nadmiaru problemów z takimi badaniami związanymi. Osoby prowadzące badania...