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Search results for: cold-formed section
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TB11 test for short w-beam road barrier
PublicationFEM (Finite Element Method) is well-suited and widely used tool for simulating a range of phenomena: from these with simple and static behaviour, up to those complicated, highly nonlinear and involving many contacts. In present paper we use one of the advantages of FEM: parametric study could be easily performed and is more economical than series of in-situ tests. If recommended practices is carefully followed, results obtained...
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Vibro-Electrical Behavior of a Viscoelastic Piezo-Nanowire in an Elastic Substrate Considering Stress Nonlocality and Microstructural Size-Dependent Effects
PublicationThis research deals with dynamics response of a Pol/BaTiO3 nanowire including viscosity influences. The wire is also impressed by a longitudinal electric field. Hamilton's principle and Lagrangian strains are employed in conjunction with a refined higher-order beam theory in order to derive equations of motion. By combining nonlocality and small size...
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The selected hydrotechnical conditions of the Dnieper – Bug Channel and the Pripyat River in the development of the International Waterway E40
PublicationInternational waterway E40 (MDW E40) is included in the network of inland waterways of transnational importance. It is a link between two areas: the Baltic Sea and the Black Sea. E40 route runs through three countries: Poland, Belarus and Ukraine. The article presents the results of the study on the analysis of two very important sections of the MDW E40 on the Belarusian section, it is:. the Dnieper – Bug Channel and the Pripy...
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Novel method of lung area extraction in chest perfusion computed tomography
PublicationChest perfusion computed tomography (pCT) is a useful technique in the medical diagnosis of how organs function. Perfusion CT scans are used to calculate perfusion parameters. In the case of automated methods of lung perfusion parameters calculation, the prior extraction of the lung area is desired to avoid unnecessary calculation in an area outside the lung cross-section and to avoid wasting time on processing signals of no diagnostic...
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Exhaust gas temperature measurements in diagnostic examination of naval gas turbine engines. Part I: Steady-state processes
PublicationThe article presents a possible method of detecting failures in the flow section and supply system of a naval gas turbine engine based on the exhaust gas temperature measured behind the gas generator. This temperature is a basic diagnostic parameter use for evaluating the technical state of the turbine engine in operation, and is monitored during engine start-ups, accelerations and decelerations of rotor units, and steady-load...
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Mercury in various components of the environment (Gulf of Gdańsk, southern Baltic Sea)
PublicationTotal mercury concentration was determined monthly form January 2012 to May 2013 in the water (microlayer and the surface), plankton, epilithon, epiphyton, benthos and sediment. The study was conducted in the coastal zone of the Gulf of Gdańsk. The abundance and biomass of plankton, benthos; the concentration of suspended particulate matter, particulate organic carbon and nitrogen; δ13C and δ15N in the suspended matter; sediment...
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Electron attachment and electron iozization of acetic acid clusters embedded in helium nanodroplets
PublicationThe effect of incident electrons on acetic acid clusters is explored for the first time. The acetic acid clusters are formed inside liquid helium nanodroplets and both cationic and anionic productsejected in to the gas phase aredetected by mass spectrometry.
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Context-aware User Modelling and Generation of Recommendations in Recommender Systems
PublicationRecommender systems are software tools and techniques which aim at suggesting new items that may be of interest to a user. This dissertation is focused on four problems in recommender systems domain. The first one is context-awareness, i.e. how to obtain relevant contextual information, how to model user preferences in a context and use them to make predictions. The second one is multi-domain recommendation, which aim at suggesting...
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Comparative Study of the Mechanical Behaviour of Bitumen- and Cement-Dominated Mixtures with Reclaimed Asphalt
PublicationThe bitumen emulsion-based recycling is a commonly used maintenance treatment in the rehabilitation of low-and medium-volume roads in Europe. Nevertheless, the wide range of climatic conditions across the continent resulted in the variety of mixture concepts and the requirements being adopted for various local conditions. In this regard, the most commonly used parameter to distinguish between the main mixture concepts is bitumen...
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Expression of a GDSL esterase from Pseudomonas sp. S9 in Pichiapastoris
PublicationCold active lipolytic enzymes are promising to replace the conventional enzymes processes of biotechnological industries. One of the most important feature of the cold-active lipases and esterases is that they offer economic benefits through energy saving. In general, they exhibit high activity at low temperatures and low thermostability at moderate temperatures. Lipolytic enzyme EstS9 was isolated from Pseudomonas sp. S9. A multiple...
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On the generalized model of shell structures with functional cross-sections
PublicationIn the present study, a single general formulation has been presented for the analysis of various shell-shaped structures. The proposed model is comprehensive and a variety of theories can be used based on it. The cross-section of the shell structure can be arbitrarily analyzed with the presented equations. In other words, various types of shell structures, including cylindrical, conical, spherical, elliptical, hyperbolic, parabolic,...
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Novel strategies to enhance hydrodynamic cavitation in a circular venturi using RANS numerical simulations
PublicationHydrodynamic cavitation is a popular advanced oxidation technique and it has received wide range of applications from waste water treatment to the nanoparticles synthesis in recent years. The enhancement of the intensity of the hydrodynamic cavitation is always been an emerging field of research. Within this framework, we have proposed and investigated three distinct strategies to enhance the intensity of cavitation in a circular...
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Laboratory Load Model Based on 150 kVA Power Frequency Converter and Simulink Real-Time – Concept, mplementation, Experiments
PublicationFirst section of the paper provides technical specification of laboratory load model basing on 150 kVA power frequency converter and Simulink Real-Time platform. Assumptions, as well as control algorithm structure is presented. Theoretical considerations based on criteria which load types may be simulated using discussed laboratory setup, are described. As described model contains transformer with thyristor-controlled tap changer,...
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Thermodynamic and economic analysis of nuclear power unit operating in partial cogeneration mode to produce electricity and district heat
PublicationThis paper presents the methodology of techno-economic analysis for a nuclear unit operating in partial cogeneration mode and its application for the case study: a nuclear power plant planned in Poland. The research objectives were: to propose EPR, AP1000 and ESBWR nuclear condensing-extraction turbine systems modifications required for operation in cogeneration, to determine optimal heat production and heat transport line (HTL)...
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Characterization of structural, thermal and mechanical properties of bismuth silicate glasses
Publicationhe influence of heating and reduction processes on the structural, thermal and mechanical properties of bismuth-silicate glasses has been investigated. Two compositions of glasses: 40Bi2O3–60SiO2 (Bi0.57Si0.43Ox) and 27Bi2O3–73SiO2 (Bi0.43Si0.57Ox) were fabricated by a typical melt quenching technique. Then the reduction in hydrogen at 380 °C for 20, 42 or 67 h was performed. It was found that a 50 μm-thick layer was formed on...
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The influence of humic substances in treated sewage on the quality of surface waters
PublicationAt present the evaluation of WWTP effectiveness is based upon organic matter and nutrients removal. Recently it was found out that sewage treatment leads to formation of resistant to biochemical degradation organic compounds, similar to humic acids. The humic acids formed during sewage treatment process play diversified functions when discharged to surface waters - for instance they can act as carriers of hydrophobic organic pollutants...
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The Role of Electron Transfer in the Fragmentation of Phenyl and Cyclohexyl Boronic Acids
PublicationIn this study, novel measurements of negative ion formation in neutral potassium-neutral boronic acid collisions are reported in electron transfer experiments. The fragmentation pattern of phenylboronic acid is comprehensively investigated for a wide range of collision energies, i.e., from 10 to 1000 eV in the laboratory frame, allowing some of the most relevant dissociation channels to be probed. These studies were performed in...
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Potential energy surfaces of the low-lying electronic states of the Li+LiCs system
PublicationAb initio quantum chemistry calculations are performed for the mixed alkali triatomic system. Global minima of the ground and first excited doublet states of the trimer are found and Born-Oppenheimer potential energy surfaces of the Li atom interacting with the LiCs molecule were calculated for these states. The lithium atom is placed at various distances and bond angles from the lithium-caesium dimer. Three-body nonadditive forces...
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Fatigue data of Cement Bitumen Treated Material Mixture C3E5.5 (Direct tension, over 28 days of curing at 20C)
Open Research DataFatigue data of Cement Bitumen Treated Material Mixture C3E5.5 (Direct tension, over 28 days of curing at 20C)
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The biotic and abiotic mercury at the coastal zone of Gulf of Gdańsk
Open Research DataConcentration of neurotoxin Hg (mercury) was determined monthly form 01.2012 to 05.2013 (total and suspended) in the surface microlayer and the surface water as well as in: phytoplankton, zooplankton, epilithon, epifithon, phytobenthos (macroalgae and angiosperms), zoobenthos, and in the sediment. The study was conducted in the coastal zone of the Puck...
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Kowalewo Pomorskie 2021 - video data - pedestrian, bicycles, vehicles
Open Research DataKowalewo Pomorskie 2021 - video data - pedestrian, bicycles, vehicles
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Sensitivity analysis of free torsional vibration frequencies of thin-walled laminated beams under axial load
PublicationThe paper addresses sensitivity analysis of free torsional vibration frequencies of thin-walled beams of bisymmetric open cross-section made of unidirectional fibre-reinforced laminate. The warping effect and the axial end load are taken into account. The consideration is based upon the classical theory of thin-walled beams of non-deformable cross-section. The first-order sensitivity variation of the frequencies is derived with...
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A Wideband Corrugated Ridged Horn Antenna with Enhanced Gain and Stable Phase Center for X- and Ku-Band Applications
PublicationIn this letter, a structure and design procedure of a novel double-flared conical horn antenna with an improved gain and a stable phase center is presented. The antenna incorporates a hybrid ridged and corrugated structure. A double-ridged section is responsible for ensuring a wideband operation, whereas the corrugated section supports the hybrid mode. The antenna impedance bandwidth (VSWR < 2) is 6 GHz to 20 GHz. Excellent performance...
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EU-Turkey Customs Union and Bilateral Foreign Direct Investment Flows
PublicationMain aim of this text is presentation of the effects of customs union between the European Union and turkey on bilateral FDI flows in light of the theory of linkages between economic integration and FDI flows. First section of the text is a survey of main theoretical links between economic integration and FDI flows. Second section focuses on the history and scope of the customs union. Third and fourth sections are empirical and...
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Positron scattering on molecular hydrogen: Analysis of experimental and theoretical uncertainties
PublicationExperiments performed in recent years on positron scattering from molecular hydrogen indicated a rise of the total cross section in the limit of zero energy, but essentially disagree on the amplitude of this rise. Mitroy and collaborators [J.-Y. Zhang et al., Phys. Rev. Lett. 103, 223202 (2009)] predicted a scattering length somewhat different from values deduced experimentally. Using a Markov chain Monte Carlo modified effective...
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Evaluation of the impact of geometry and plastic deformation on the stray magnetic field around the bone shaped sample
PublicationInfluence of two factors: the variable cross-section and the localized plastic deformation, which affect the stray magnetic field profile of a ferromagnetic sample have been studied. Evaluation of an effect size is based on the analysis of the stray magnetic field component which is tangential to the longest dimension of a sample. However, in order to describe the nature of the stray magnetic field, the normal component (perpendicular...
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Damage Analysis of Tensioning Cable Anchorage Zone of a Bridge Superstructure, Using CDP Abaqus Material Model
PublicationNumerical analysis of the tensioning cables anchorage zone of a bridge superstructure is presented in this paper. It aims to identify why severe concrete cracking occurs during the tensioning process in the vicinity of anchor heads. In order to simulate the tensioning, among others, a so-called local numerical model of a section of the bridge superstructure was created in the Abaqus Finite Element Method (FEM) environment. The...
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Video traffic data - Interchange Zakrzewo (S11-307), Poland
Open Research DataThe data includes video traffic data registered with 8 video cameras at weaving area (weaving section type A) of the Zakrzewo interchange within S11 expressway in Poland (interchange of expressway S11 and regional road 307), located in the Poznan Agglomeration. The data covers the two days: 20.09.2017 (expressway S11) and 21.09.2017 (road 307).
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Magdalena Stankevic dr inż.
PeopleDziedzinowy bibliotekarz akademicki. Doktor nauk farmaceutycznych oraz absolwentka Biotechnologii na Wydziale Chemicznym Politechniki Gdańskiej, kierunek dyplomowania Technologia Leków i Biochemia. W Bibliotece Politechniki Gdańskiej, jako starszy bibliotekarz w Sekcji Obsługi Czytelnika, koordynuje działania Regionalnej Biblioteki Nanotechnologii – Filii na Wydziale Chemicznym oraz Filii na Wydziale Fizyki Technicznej i Matematyki...
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Alicja Toboła-Rynkiewicz mgr
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Agnieszka Leszczewicz mgr
PeopleAgnieszka Leszczewicz pracuje w Bibliotece Politechniki Gdańskiej od 1995 roku. Jest absolwentką Filologii Polskiej na Uniwersytecie Gdańskim oraz studiów podyplomowych Informacja Naukowa na Uniwersytecie Warszawskim. Jest słuchaczką Filologicznego Studium Doktoranckiego Uniwersytetu Gdańskiego. W Bibliotece Politechniki Gdańskiej, jako starszy bibliotekarz w Sekcji Obsługi Czytelnika, koordynuje działania Filii na Wydziale Elektrotechniki...
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Unassisted formation of hemiaminal ether from 4-aminopyridine and o-vanillin - experimental and theoretical study
PublicationThe reactions between o-vanillin and three isomeric aminopyridines lead to imines of diverse spatial conformation and reactivity. The direct products of these simple reactions carried out in methanol are either imine compounds formed in the reactions of 2- amino- and 3-aminopyridine with o-vanillin or the α-aminoether formed in the reaction of o-vanillin with 4-aminopyridine. The Schiff-type derivative of 4-aminopyridine and o-vanillin,...
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Maria Damps dr n.med.
PeopleA specialist in anesthesiology and intensive care, Dr. Maria Damps works every day at the Upper Silesian Children's Health Center in Katowice and as a scientific and research assistant at the Faculty of Medical Sciences at the Medical University of Silesian, Poland. Dr. Damps is a graduate of postgraduate studies in medical law and bioethics at the Jagiellonian University in Kraków. Dr. Damps is also the chairwoman of the Ethics...
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SEM images of symmetrical cell interface with Sr1.05Ti0.30Fe0.70O3-d electrodes and CGO-20 substrate sintered at 800 °C, 900 °C and 1000 °C
Open Research DataThis dataset contains images of polished cross section of symmetrical cell interface with Sr1.05Ti0.30Fe0.70O3-d electrodes and CGO-20 substrate sintered at three different temperatures 800 °C, 900 °C and 1000 °C. Images were obtained using a PhenomXL (Thermo Fisher Scientific, the Netherlands) scanning electron microscope (SEM) with an accelerating...
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SEM images of symmetrical cell interface with Sr1.00Ti0.30Fe0.70O3-d electrodes and CGO-20 substrate sintered at 800 °C, 900 °C and 1000 °C
Open Research DataThis dataset contains images of polished cross section of symmetrical cell interface with Sr1.00Ti0.30Fe0.70O3-d electrodes and CGO-20 substrate sintered at three different temperatures 800 °C, 900 °C and 1000 °C. Images were obtained using a PhenomXL (Thermo Fisher Scientific, the Netherlands) scanning electron microscope (SEM) with an accelerating...
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SEM analysis of the TiO2 layers deposited on a FTO substrates
Open Research DataTitanium dioxide layers were deposited on a FTO conducting glass by sol-gel method. For sol gel synthesis butoxy titanium and ethanol were used as a reagents. Samples were sintered in a furnace at temperature of 600 deg. SEM measurements were performed by FEI Quanta FEG250 microscope. SEM images of a cross-section of samples exhibit a porous structures...
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Internet payment methods in Poland
PublicationIn this chapter authors intended to describe wide range of aspects of the Internet payment systems. At the beginning there is briefly shown their evolution and features required for the effective payment system. Data on the popularity of different payment systems in Internet transactions links this section with description of the current state of payment systems available in Poland.
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Development and validation of lumbar spine finite element model
PublicationThe functional biomechanics of the lumbar spine have been better understood by finite element method (FEM) simulations. However, there are still areas where the behavior of soft tissues can be better modeled or described in a different way. The purpose of this research is to develop and validate a lumbar spine section intended for biomechanical research. A FE model of the 50th percentile adult male (AM) Total Human Model for Safety...
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SEM images of symmetrical cell interface with Sr0.90Ti0.30Fe0.70O3-d electrodes and CGO-20 substrate sintered at 800 °C, 900 °C and 1000 °C
Open Research DataThis dataset contains images of polished cross section of symmetrical cell interface with Sr0.90Ti0.30Fe0.70O3-d electrodes and CGO-20 substrate sintered at three different temperatures 800 °C, 900 °C and 1000 °C. Images were obtained using a PhenomXL (Thermo Fisher Scientific, the Netherlands) scanning electron microscope (SEM) with an accelerating...
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SEM images of symmetrical cell interface with Sr0.95Ti0.30Fe0.70O3-d electrodes and CGO-20 substrate sintered at 800 °C, 900 °C and 1000 °C
Open Research DataThis dataset contains images of polished cross section of symmetrical cell interface with Sr0.95Ti0.30Fe0.70O3-d electrodes and CGO-20 substrate sintered at three different temperatures 800 °C, 900 °C and 1000 °C. Images were obtained using a PhenomXL (Thermo Fisher Scientific, the Netherlands) scanning electron microscope (SEM) with an accelerating...
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Krotoszyn 2021 - video data I - pedestrian, bicycles, vehicles
Open Research DataKrotoszyn 2021 - video data - pedestrian, bicycles, vehicles
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Gostyn 2021 - video data I - pedestrian, bicycles, vehicles
Open Research DataGostyn 2021 - video data - pedestrian, bicycles, vehicles
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DW214 Kościerzyna- Nowa Kiszewa 2020- video data
Open Research DataDW214 Kościerzyna- Nowa Kiszewa 2020- video data
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Miedzyborz 2021 - video data I - pedestrian, bicycles, vehicles
Open Research DataMiedzyborz 2021 - video data - pedestrian, bicycles, vehicles
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Strength analysis of container ship subjected to torsional loading
PublicationThe objective of this work is to investigate the torsional response of a container ship, with particular consideration of the warping effect. Two different models are investigated. In the first case, the full length model of a ship is analyzed and a distributed load is applied with the use of a novel approach. The model is supported in the torsional centre of the cross-section, which is derived analytically. In the second case,...
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A Noded Carbon Emission Tool (NCET) to Measure Embodied Carbon (EC) in Compositional Cementitious Materials
PublicationThe ever evolving modern construction industry is now producing the highest levels of carbon content adversely affecting the construction associated environment. Although, the impact of carbon induced emission is quite large, but still not enough measurable standards and tools to scale these emission are available. This study contributes to the body of knowledge by providing a Grasshopper based definition to calculate the embodied...
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An isogeometric finite element formulation for geometrically exact Timoshenko beams with extensible directors
PublicationAn isogeometric finite element formulation for geometrically and materially nonlinear Timoshenko beams is presented, which incorporates in-plane deformation of the cross-section described by two extensible director vectors. Since those directors belong to the space R3, a configuration can be additively updated. The developed formulation allows direct application of nonlinear three-dimensional constitutive equations without zero...
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CFFT columns in road through railroad crossings
PublicationThere were 12801 road through railroad one-level crossings in Poland in 2018. 215 accidents happened at them in 2018. In order to increase safety in rail and road traffic two-level crossings should be used. They are definitely safer and make the traffic more smooth. In the design and construction of two-level intersections of railway and road or path columns of circular cross-section are often used. They can be successfully replaced...
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Designing Aggregate KPIs as a Method of Implementing Decision-Making Processes in the Management of Smart Cities
PublicationThe aim of the paper is to present a concept of measuring the performance of city management processes by use of a concept of aggregate KPIs. In the management of organizations and, as a consequence of the use of a common design framework also in the management of cities, silo KPIs are commonly used to show the statuses of the processes of organizations/cities. Thus the question arises as to what extent aggregate KPIs, as proposed...
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Generalized temperature dependence model for anammox process kinetics
PublicationTemperature is a key operational factor influencing the anammox process kinetics. In particular, at temperatures below 15 °C, the specific anammox activity (SAA) considerably decreases. This study aimed to describe the temperature dependence of the anammox process kinetics in the temperature range from 10 to 55 °C, including the specific characteristics of“cold anammox”. The commonly used Arrhenius and extended and modifiedRatkowsky...