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Wyniki wyszukiwania dla: MOST ŁUKOWY
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Cost-Efficient Bi-Layer Modeling of Antenna Input Characteristics Using Gradient Kriging Surrogates
PublikacjaOver the recent years, surrogate modeling has been playing an increasing role in the design of antenna structures. The main incentive is to mitigate the issues related to high cost of electromagnetic (EM)-based procedures. Among the various techniques, approximation surrogates are the most popular ones due to their flexibility and easy access. Notwithstanding, data-driven modeling of antenna characteristics is associated with serious...
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Low-Cost Unattended Design of Miniaturized 4 × 4 Butler Matrices with Nonstandard Phase Differences
PublikacjaDesign of Butler matrices dedicated to Internet of Things and 5th generation (5G) mobile systems—where small size and high performance are of primary concern—is a challenging task that often exceeds capabilities of conventional techniques. Lack of appropriate, unified design approaches is a serious bottleneck for the development of Butler structures for contemporary applications. In this work, a low-cost bottom-up procedure for...
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A Surrogate-Assisted Measurement Correction Method for Accurate and Low-Cost Monitoring of Particulate Matter Pollutants
PublikacjaAir pollution involves multiple health and economic challenges. Its accurate and low-cost monitoring is important for developing services dedicated to reduce the exposure of living beings to the pollution. Particulate matter (PM) measurement sensors belong to the key components that support operation of these systems. In this work, a modular, mobile Internet of Things sensor for PM measurements has been proposed. Due to a limited...
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Inline Waveguide Filter With Transmission Zeros Using a Modified-T-Shaped-Post Coupling Inverter
PublikacjaThis letter reports the design techniques for a class 2 of inline waveguide bandpass filters with sharp-rejection capabil3 ities at the lower stopband based on a novel nonlinear-frequency4 variant-coupling (NFVC) structure. The proposed NFVC consists 5 of a modified-T-shaped metallic post (MTP) that is placed at the 6 center of the waveguide broad wall with its open arms lying 7 along the waveguide width. The engineered NFVC structure 8...
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Cost-Efficient EM-Driven Size Reduction of Antenna Structures by Multi-Fidelity Simulation Models
PublikacjaDesign of antenna systems for emerging application areas such as the Internet of Things (IoT), fifth generation wireless communications (5G), or remote sensing, is a challenging endeavor. In addition to meeting stringent performance specifications concerning electrical and field properties, the structure has to maintain small physical dimensions. The latter normally requires searching for trade-off solutions because miniaturization...
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A New Canon of the Modernist Villa of the 1930s - a Villa with a Semicircular Veranda. The Post-War Continuation of the Idea
PublikacjaThe articcle presents a new type of villa, which started to be popular in Gdynia in the 1930s. It was a villa with a semicircular veranda. Villas of that type were continously built also after the II World War
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Host and pathogen factors in Klebsiella pneumoniae upper urinary tract infections in renal transplant patients
PublikacjaPurpose . To analyse the role of virulence factors (VFs) and host in Klebsiella pneumoniae upper urinary tract infections (UTIs) in renal transplant (RTx) recipients. Methodology. Clinical and demographic data were registered prospectively. Phylogenetic background of K. pneumoniae isolates was analysed by PCR melting profiles (MP) and the following VFs genes: fimH-1, uge, kpn, ycfM, mrkD, rmpA, magA, hlyA, cnf-1, irp-1, irp-2,...
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Studies on the utilization of post-distillation liquid from Solvay process to carbon dioxide capture and storage
PublikacjaIn this work, a method of precipitated calcium carbonate production from the post-distillation liquid created in the Solvay process and waste carbon dioxide was proposed and investigated. Precipitation was carried out in a model solution of calcium chloride containing ammonia at various molar ratios in relation to Ca2+ ions, while gaseous carbon dioxide was supplied to the reactor as a pure gas or as a mixture with air. It was...
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Effect of the Post-Weld Surface Condition on the Corrosion Resistance of Austenitic Stainless Steel AISI 304
PublikacjaSurfaces of welded elements made of corrosion-resistant (stainless) steels develop temper colours. The removal of thickened oxide layers off steels exposed to temperatures below 300°C is necessary and entails the restoring of high corrosion resistance of the stainless steel. The article presents tests concerned with the effect of a method applied to remove post-weld temper on the corrosion resistance of austenitic stainless steel...
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Providing Public Space Continuities in Post-Industrial Areas through Remodelling Land/Water Connections
PublikacjaThis article examines the problem of urban transformation strategies applied in recent years which are based on the creation of new water areas and modification of existing ones. The research is an attempt to prove that modifications of plans of water areas and forms of their borders may play an important role in achieving the best quality public spaces in post-industrial territories. The basis for demonstrating the importance...
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The analysis of firms’ involvement in internationalisation and determinants of its intensity – an analysis for developing and post-transition economies
PublikacjaThe study presents the empirical analysis of firms’ involvement in different forms of internationalisation: export, indirect export, import, indirect import and finally simultaneous exporting and importing. The analysis is based on firm-level data from the World Bank Enterprise Survey (March 2017 release). The empirical part is divided into two stages. Firstly account is taken of firms’ heterogeneity and then a Melitz type analysis...
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Low-Cost Multi-Objective Optimization of Antennas By Means Of Generalized Pareto Ranking Bisection Algorithm
PublikacjaThis paper introduces a generalized Pareto ranking bisection algorithm for low-cost multi-objective design optimization of antenna structures. The algorithm allows for identifying a set of Pareto optimal sets of parameters (that represent the best trade-offs between considered objectives) by iterative partitioning of the intervals connecting previously found designs and executing a Pareto-ranking-based poll search. The initial...
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On deterministic procedures for low-cost multi-objective design optimization of miniaturized impedance matching transformers
PublikacjaPurpose This paper aims to investigate deterministic strategies for low-cost multi-objective design optimization of compact microwave structures, specifically, impedance matching transformers. The considered methods involve surrogate modeling techniques and variable-fidelity electromagnetic (EM) simulations. In contrary to majority of conventional approaches, they do not rely on population-based metaheuristics, which permit lowering...
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Low Cost Hexacopter Autonomous Platform for Testing and Developing Photogrammetry Technologies and Intelligent Navigation Systems
PublikacjaLow-cost solutions for autonomous aerial platforms are being intensively developed and used within geodetic community. Unmanned aerial vehicles are becoming very popular and widely used for photogrammetry and remote sensing applications. Today’s market offers an affordable price components for unmanned solution with significant quality and accuracy growth. Every year market offers a new solutions for autonomous platforms with better...
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Low-cost multi-objective optimization of antennas using Pareto front exploration and response features
PublikacjaIn the paper, a procedure for low-cost multi-objective optimization of antenna structures is presented. Our approach is based on exploration of the Pareto front representing the best possible trade-offs between conflicting objectives, here, the structure size and its electrical performance. Starting from the design representing the best in-band reflection level, subsequent Pareto-optimal designs are identified through local constrained...
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Determination of paraffin oil mist penetration at high flow rates through air-purifying respirators
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Wpływ powstania repozytorium MOST Wiedzy na rozwój Open Access i zwiększenie liczby cytowań publikacji – analiza publikacji pracowników Politechniki Gdańskiej (2010–2019)
PublikacjaCzy warto pisać publikacje w Otwartym Dostępie? Czy warto udostępniać publikacje w otwartych repozytoriach? Jakie znaczenie dla pracowników naukowych ma pisanie publikacji w Otwartym Dostępie? Czy powstanie we wrześniu 2017 roku na Politechnice Gdańskiej instytucjonalnego repozytorium MOST Wiedzy mogło mieć korzystny wpływ na rozwój Open Access? Czy udostępnianie publikacji w modelu Open Access wpływa na cytowalność publikacji?
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Właściwości mieszanin typu recyklat polietylenu-miał gumowy modyfikowanych poliizobutylenem w obecności nadtlenków
PublikacjaMiał gumowy poddawano modyfikacji poliizobutylenem metodą mieszania w warunkach ścinania w obecności nadtlenków lub bez nich. Miał gumowy modyfikowany poliizobutylenem przerabiano w mieszalniku firmy Brabender wraz z poprodukcyjnym recyklatem polietylenu wysokiej gęstości w stosunku wagowym 50:50. Określono statyczne i dynamiczne właściwości mechaniczne otrzymanych kompozycji termoplastycznych.
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Metoda budowy programów przekształceń i rewitalizacji zdegradowanych struktur miejskich w warunkach polskich
PublikacjaW artykule zawarto omówienie możliwości budowania różnorakich strategii realizacji działań rewitalizacyjnych. Szczególna uwagę zwrócono na zagadnienie znaczenia inwestycji i ich różnych rodzajów, a także kwestii ich powiązania z innymi zagadnieniami w ramach procesu rewitalizacji.
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Wpływ budowy i krótkich czasów wygrzewania na stabilność termiczną lanych elastomerów uretanowych
PublikacjaW pracy przedstawiono syntezę lanych elastomerów uretanowych otrzymywanych metodą dwuetapową. Prepolimery o stężeniu grup NCO 6,5 i 7,9% otrzymano z diizocyjanianu difenylometanu (MDI) i Polesu 55/20, które przedłużano glikolem butylenowym, zawierającym katalizator DABCO. Poliuretany zsyntetyzowano przy stosunkach molowych NCO:OH od 0,95 do 1,15. Sieciowanie PUR przeprowadzono w przyjętych czasach w temperaturze 110 st.C. Do...
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Wyłączniki różnicowoprądowe i urządzenia do detekcji zwarć łukowych w ochronie przed pożarem
PublikacjaW referacie przedstawiono zasady stosowania wyłączników różnicowoprądowych w ochronie przed pożarem. Podano ich największy dopuszczalny znamionowy prąd różnicowy zadziałania w tej ochronie oraz zwrócono uwagę na przypadki, w których mogą one nie działać, mimo występującego zagrożenia pożarowego. Omówiono również urządzenia do detekcji zwarć łukowych, które są nowym rodzajem zabezpieczeń, zalecanym do instalacji elektrycznych obiektów...
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BADANIA ODBIOROWE ŁUKOWEJ KŁADKI DLA PIESZYCH 10T NAD DROGĄ S8 W WARSZAWIE
PublikacjaThe paper presents in situ load testing of the newly build footbridge over S8 expressway in Warsaw. The most characteristic thing for the structure is a shape of arch girders, which correspond with adjacent half-tunnel acoustic baffles. The paper consists of description of the structure, results of the in-situ static and dynamic load testing, results of the numerical simulations, comparative analysis and final conclusions on the...
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PIEC ŁUKOWY
Aparatura Badawcza -
Bacteria in water and bottom sediments in post-dredging pits - Puck Bay (Baltic Sea)
Dane BadawczeThe dataset contains the results of microbiological testing of water and bottom sediments samples taken from the post-dredging pits - Puck Bay (Baltic Sea). The samples for testing were collected from 10th of April 2008 to 14th of April 2008. In total, there were 30 samples collected from 15 sites, including 15 water samples and 15 sediment samples....
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Warmińsko-Mazurski Kwartalnik Naukowy, Nauki Społeczne
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Kwartalnik Naukowy OAP UW "e-Politikon"
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Oficjalne porozumienia i umowy, regulujące rozwój współczesnych stosunków polsko-estońskich.
PublikacjaPrzemiany społeczno-polityczne, zachodzące w latach 90-tych w Polsce i Estonii wywierają ważny wpływ na rozwój stosunków pomiędzy obu krajami. Istotne jest znaczenie regulacji prawnych. Rozwój współczesnych stosunków polsko-estońskich i partnerskiej współpracy służy interesom obu państw i narodów, dostrzega się w nich wolę regulacji i normalizacji oraz wzajemnego wsparcia na drodze do struktur europejskich. Dotychczas obie strony...
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Long-term changes in the Leucobryo-Pinetum community: interactions between the tree-stand, understorey and moss layer
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Comparison of radical-driven technologies applied for paraben mixture degradation: mechanism, biodegradability, toxicity and cost assessment
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A comprehensive survey on low-cost ECG acquisition systems: Advances on design specifications, challenges and future direction
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Does caffeine ingestion affect the lower-body post-activation performance enhancement in female volleyball players?
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Antagonist activation exercises elicit similar post-activation performance enhancement as agonist activities on throwing performance
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Low-cost nitrogen-doped activated carbon prepared by polyethylenimine (PEI) with a convenient method for supercapacitor application
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Experiences of people with dementia and informal caregivers with post‐diagnostic support: Data from the international COGNISANCE study
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Wear of carbide inserts during turning of C45 steel in dry cutting conditions and in presence of emulsion mist
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The Use of Different Modes of Post-Activation Potentiation (PAP) for Enhancing Speed of the Slide-Step in Basketball Players
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Facile and cost-effective technique to control europium oxidation states in glassy fluorophosphate matrices with tunable photoluminescence
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Thermoluminescence Enhancement of LiMgPO4 Crystal Host by Tb3+ and Tm3+ Trivalent Rare-Earth Ions Co-doping
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Analysis of cost structure of international road transport operators in West Pomeranian voivodship in the years 2008-2014
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PUBLIC GOODS VERSUS THE FARM PRICE-COST SQUEEZE: SHAPING THE SUSTAINABILITY OF THE EU’S COMMON AGRICULTURAL POLICY
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Efficiency of Electricity Production Technology from Post-Process Gas Heat: Ecological, Economic and Social Benefits
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The cost minimizing solution of the transportation problem for the location of the building machinery yard along the road under construction
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Finding the Right Solvent: A Novel Screening Protocol for Identifying Environmentally Friendly and Cost-Effective Options for Benzenesulfonamide
PublikacjaThis study investigated the solubility of benzenesulfonamide (BSA) as a model compound using experimental and computational methods. New experimental solubility data were collected in the solvents DMSO, DMF, 4FM, and their binary mixtures with water. The predictive model was constructed based on the best-performing regression models trained on available experimental data, and their hyperparameters were optimized using a newly...
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Planning Recreation around Water Bodies in Two Hard Coal Post-Mining Areas in Southern Poland
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Technologia montażu mostu przez Wisłę w Touniu metodą transportu wodnego - przygotowanie projektowe operacji
PublikacjaArtykuł opisuje przygotowanie projektowe montażu mostu przez Wisłę w Toruniu
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HPLC-coupled post-column derivatization aims at characterization and monitoring of plant phytocomplexes, not at assessing their biological properties
PublikacjaTwo recent decades of research identified a number of environmental factors as well as mechanisms leading to pathogenic processes in the human organism. A common factor in pathogenesis of many diseases is oxidative stress, a condition in which the production of damaging reactive oxygen species (ROS), present in the body as an inevitable consequence of respiration and exacerbated by the inflammatory response and by exogenous factors...
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Cost-Efficient Measurement Platform and Machine-Learning-Based Sensor Calibration for Precise NO2 Pollution Monitoring
PublikacjaAir quality significantly impacts human health, the environment, and the economy. Precise real-time monitoring of air pollution is crucial for managing associated risks and developing appropriate short- and long-term measures. Nitrogen dioxide (NO2) stands as a common pollutant, with elevated levels posing risks to the human respiratory tract, exacerbating respiratory infections and asthma, and potentially leading to chronic lung...
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Low-Cost Method for Internal Surface Roughness Reduction of Additively Manufactured All-Metal Waveguide Components
PublikacjaIn this study, a novel low-cost polishing method for internal surface roughness reduction of additively manufactured components, developed for waveguide (WG) circuits operating in the millimeter frequency range is proposed. WG components fabricated using powder bed fusion (PBF) generally feature roughness of ten to fifty microns, which influences the increase of roughness-related conductor power losses having a major effect on...
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A comprehensive survey on low-cost ECG acquisition systems: Advances on design specifications, challenges and future direction
PublikacjaAvailability of low-cost, reliable, and portable Electrocardiography (ECG) devices is still very important in the medical world today. Despite the tremendous technological advancement, Cardiovascular Diseases (CVDs) remain a serious health burden claiming millions of lives on an annual basis globally. This is more prevalent in Low and Middle-Income Countries (LMICs) where there are huge financial instability and lack of critical...
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A Cost-Effective Method for Reconstructing City-Building 3D Models from Sparse Lidar Point Clouds
PublikacjaThe recent popularization of airborne lidar scanners has provided a steady source of point cloud datasets containing the altitudes of bare earth surface and vegetation features as well as man-made structures. In contrast to terrestrial lidar, which produces dense point clouds of small areas, airborne laser sensors usually deliver sparse datasets that cover large municipalities. The latter are very useful in constructing digital...