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Search results for: STRUCTURAL TOPIC MODELLING
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AQUA-DUCT 1.0: structural and functional analysis of macromolecules from an intramolecular voids perspective
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Structural Characterization and in Vivo Evaluation of β-Hairpin Peptidomimetics as Specific CXCR4 Imaging Agents
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Influence of mechanochemical treatment on thermal and structural properties of silica–collagen and hydroxyapatite–collagen composites
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Model angular distribution functions in CA3, CA4 and CA6 structural units of glassy systems
PublicationMetodą Monte Carlo wyliczono funkcje rozkładu kątów pomiędzykrawędziami w losowo deformowanych jednostkach strukturalnychCA_3, CA_4 i CA_6, gdzie C oznacza centralny kation,a A - wierzchołkowy anion. Uzyskane dane mogą być wykorzystanejako dane referencyjne do ilościowej oceny stopnia nieporządkuw materiałach symulowanych numerycznie, głównie szkłachtlenkowych. W pracy podano przykłady takiego zastosowania.
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Effect of ground tire rubber on structural, mechanical and thermal properties of flexible polyurethane foams
PublicationFlexible polyurethane foams were modified with two kinds of ground tire rubber, untreated and thermo-mechanically reclaimed. A reclamation process was performed in auto-thermal conditions, which reduced the cost of the process and decreased the environmental impact of devulcanization (e.g., emission of gases). The reclamation process was carried out in a continuous manner using a co-rotating twin screw extruder. The foams were...
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The role of the LB structural loop and its interactions with the PDZ domain of the human HtrA3 protease
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A Review of Progress in Histone Deacetylase 6 inhibitors Research: Structural Specificity and Functional Diversity.
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Structural Disorder in High-Spin {CoII9WV6} (Core)-[Pyridine N-Oxides] (Shell) Architectures
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Lamb wave based structural damage detection using cointegration and fractal signal processing
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Cointegration and wavelet-analysis-based approach for Lamb-wave-based structural damage detection
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Characterization of Structural and Energetic Differences between Conformations of the SARS-CoV-2 Spike Protein
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Polymeric bisphosphonate derivative of ciprofloxacin – synthesis, structural analysis and antibacterial activity of the prospective conjugate
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An application of neural network for Structural Health Monitoring of an adaptive wing with an array of FBG sensors
PublicationW pracy przedstwiono możliwości zastoswania sieci czujników FBG i sztucznych sieci neuronowych do detekcji uszkodzeń w poszyciu adaptacyjnego skrzydła.
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Temperature and potential-dependent structural changes in Pt cathode electrocatalyst viewed by in situ XAFS
PublicationW pracy przedstawiono wyniki badań widm absorpcji promieniowania rentgenowskiego nano-platyny używanej jako katalizator w katodach polimerowych ogniw paliwowych (PEM FC). Badania XAFS realizowane były w warunkach pracy ogniwa paliwowego. Wysokiej jakości widma, uzyskane za pomocą specjalnie przygotowanej do pomiarów XAFS in situ komórki FC, umożliwiły przeprowadzenie zaawansowanej analizy obrazującej zmiany w lokalnej strukturze...
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Structural and electrical properties of Sr(Ti,Fe)O3-δ materials for SOFC cathodes
PublicationW niniejszym artykule, dwa związki SrTiO3 domieszkowanego Fe przebadano pod względem przydatności na katody w tlenkowych ogniwach paliwowych. SrTi0.65Fe0.35O3 i SrTi0.5Fe0.5O3 zostały przebadane pod względem reaktywności chemicznej z elektrolitem YSZ. Stwierdzono, że przewodnictwo elektryczne tych związków jest stosunkowo niskie: 0,4 S/cm i 2 S/cm odpowiednio dla STF35 i STF50.
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Synthesis, structural and spectroscopic properties of asymmetric schiff bases derived from 2,3-diaminopyridine
PublicationTwo Schiff base derivatives, 4-(2-amino-3-pyridyliminomethyl)phenol (I) and 3-(2-amino-3- pyridyliminomethyl)nitrobenzene (II ), were synthesised and characterised by spectroscopy. The structure of I was determined by single crystal X-ray diffraction studies. The asymmetric Schiff base derived from 2,3-diaminopyridine selectively recognise transition and heavy metal cations, and some anion. Ligands I and II form stable complexes...
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Structural Studies of Thyroid Peroxidase Show the Monomer Interacting With Autoantibodies in Thyroid Autoimmune Disease
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Structural, physico-chemical and antioxidant characteristics of 2,2′-bipyridyl(iminodiacetato)oxidovanadium(IV) dihydrate
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Structural studies on radiopharmaceutical DOTA-minigastrin analogue (CP04) complexes and their interaction with CCK2 receptor
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Synthesis, structural, electronic and linear electro-optical features of new quaternary Ag2Ga2SiS6 compound
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A Comparison between MD and EXAFS extracted Structural Data for TernaryRbBr(1-x)Ix.
PublicationStrukturę trójskładnikowych soli poddano analizie za pomocą metody EXAFS i symulacji M-D. Przedyskutowano przydatność używanego w symulacjach potencjału oddziaływań międzyatomowych.
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Prediction of the fatigue lifetime of PUR structural elements using a combined experimental-numerical approach
PublicationThis paper presents a method for estimating the fatigue life of polyurethane elastomeric components. A rubber replacement - polyurethane of hardness 80ShA commonly used in vibration damping systems, for example, in motor vehicle suspensions, was used for the study. A metal-rubber bushing component was selected for analysis, and numerical analysis was carried out along with a fatigue model proposal based on a modification of the...
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Mg2+ Doping Effects on the Structural and Dielectric Properties of CaCu3Ti4O12 Ceramics Obtained by Mechanochemical Synthesis
PublicationIn this study, ceramic CaCu3Ti4O12 (CCTO) and CaCu3−xMgxTi4O12 solid solutions in which 0.1 ≤ x ≤ 0.5 were prepared by the mechanochemical method, realized by a high‐energy ball milling technique. The effects of the Mg2+ ion concentration and sintering time on the dielectric response in the prepared ceramics were investigated and discussed. It was demonstrated that, by the use of a sufficiently high energy of mechanochemical treatment,...
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A comparison of structural and luminescence properties of lead(II) coordination polymers with isomeric thiophenecarboxylate ligands
PublicationTwo new lead(II) coordination polymers with isomeric thiophenecarboxylates, namely [Pb(2tpCOO)2]n (1) and [Pb(3tpCOO)2(H2O)]n (2) (2tpCOO− = thiophene-2-carboxylate, 3tpCOO− = thiophene-3-carboxylate), were synthesized and characterized. Single crystal X-ray crystallography revealed a distorted pentagonal pyramidal geometry {PbO6} around Pb in 1 and a distorted dodecahedral geometry {PbO8} in 2. The distortion derived from the...
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Structural and Thermo-Mechanical Properties of Poly(ε-caprolactone) Modified by Various Peroxide Initiators
PublicationThe modification of poly(ε-caprolactone) (PCL) was successfully conducted during reactive processing in the presence of dicumyl peroxide (DCP) or di-(2-tert-butyl-peroxyisopropyl)-benzene (BIB). The peroxide initiators were applied in the various amounts of 0.5 or 1.0 pbw (part by weight) into the PCL matrix. The effects of the initiator type and its concentration on the structure and mechanical and thermal properties of PCL were...
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Structural Reliability Assessment Of Corroded Tanker Ship Based On Experimentally Estimated Ultimate Strength
PublicationThis work deals with the reliability assessment of a tanker ship hull structure subjected to a vertical bending moment and corrosion degradation. The progressive collapse and ultimate load carrying capacity are estimated based on experimentally tested scaled box-shaped-specimens. The translation of the strength estimate of the scaled specimen to the real tanker ship hull structure is performed based on the dimensional theory developing...
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Structural, functional, and stability change predictions in human telomerase upon specific point mutations,
PublicationOverexpression of telomerase is one of the hallmarks of human cancer. Telomerase is important for maintaining the integrity of the ends of chromosomes, which are called telomeres. A growing number of human disease syndromes are associated with organ failure caused by mutations in telomerase (hTERT or hTR). Mutations in telomerase lead to telomere shortening by decreasing the stability of the telomerase complex, reducing its accumulation,...
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EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
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JOURNAL OF STRUCTURAL ENGINEERING-ASCE
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Modal Adjustment of Rayleigh Based Structural Damping and Coordinate-Partitioning Algorithm Dedicated to Frictionless Contact Constraints between Multibody System and Structure Modelled with Finite Elements
PublicationThe paper presents a dedicated numerical algorithm. The algorithm is advantageous during investigations of the dynamics of a hybrid multibody / finite-elements system. We focus our attention on interactions resulting from mechanical contact. Pointwise contact connects a vertex of the multibody structure and a surface of the elastic reference body. Instead of a positive value of the relative penetration factor, constraint equations...
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Modelling of the Baumann turbine stage operation Part II. Free and kinetic vibrations
PublicationIn this paper has been presented a methodology of validation a novel mathematical model dedicated to evaluation and prediction of material degradation and demage of steam turbine elements such as blades, valves and pipes due to three mechanisms: stress-corosion, high-temperature creep and low-cyclic fatigue. The validation concept is based on an experimental setup manufactured in the Laboratory of Faculty of Mechanical and Power...
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Modelling of Curvature of the Railway Track Geometrical Layout Using Particle Swarm Optimization
PublicationA method of railway track geometrical layout design, based on application of cubic C-Bezier curves for describing the layout curvature is presented in the article. The control points of a cubic C-Bezier curve are obtained in an optimization process carried out using Particle Swarm Optimization algorithm. The optimization criteria are based on the evaluation of the dynamic interactions and satisfaction of geometrical design requirements.
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3D modelling of liquid fuels base infrastructure for the purpose of visualization and geometrical analysis
PublicationThe paper presents the methodology for obtaining a 3D model of the tank for liquid fuels on the basis of the terrestrial laser scanning and its processing for the analysis of tanks geometry. The development process indicates the possibility to obtain the reliable results useful for the evaluation of the tank side surfaces geometry (shells). The result of the development is a 3D model of the tank, taking into account the individual...
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Turbulence model evaluation for numerical modelling of turbulent flow and heat transfer of nanofluids
PublicationIn this work, Nusselt number and friction factor are calculated numerically for turbulent pipe flow (Reynolds number between 6000 and 12000) with constant heat flux boundary condition using nanofluids. The nanofluid is modelled with the single-phase approach and the simulation results are compared with experimental data. Ethylene glycol and water, 60:40 EG/W mass ratio, as base fluid and SiO2 nanoparticles are used as nanofluid...
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Mathematical Modelling of a Seismic Isolation System to Protect Structures During Damaging Earthquakes
PublicationThe present study aims to determine the effectiveness of a nonlinear mathematical model in simulating complex mechanical behaviour of a seismic isolation system to protect structures during strong and damaging earthquakes. In order to construct the Polymeric Bearings considered in this research, a specially prepared flexible polyurethane elastomer with increased damping properties has been used. The usefulness of the proposed mathematical...
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The experimental investigations and modelling of trak work with the use of tamping machine's diagnostic informations
PublicationW pracy przedstawiono realizowany w Katedrze Inżynierii Kolejowej Politechniki Gdańskiej program badawczy, którego idea zasadza się na wykorzystaniu podbijarki torowej w zakresie diagnostyki toru kolejowego. Skupiono się głównie na dwóch aspektach związanych z torem bezstykowym, tj. na siłach podłużnych występujących w tokach szynowych oraz na oporach poprzecznych rusztu torowego związanych głównie ze stopniem ustabilizowania podsypki...
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Institutional Settings and their Impact on the IPO Activity: An Exploratory Study Based on Qualitative Modelling
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Selection of the most adequate trip-modelling tool for integrated transport planning system
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Design, modelling and analysis of a new type of piezoelectric motor. Multicell piezoelectric motor
PublicationThis paper describes a new type of piezoelectric motor. The results, obtained in the field of piezoelectric motors, have pointed out that these motors have potentially high possibilities in the future special applications. The research work presents the design, simulations and parameters of the piezoelectric motor with three rotation-mode actuators. The motor is characterized by a high power, relative high speed and torque. The...
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Mathematical Modelling of a Seismic Isolation System to Protect Structures during Damaging Earthquakes
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Effects of subfilter velocity modelling on dispersed phase in LES of heated channel flow
PublicationA non-isothermal turbulent flow with the dispersed phase is modelled using the Large Eddy Simulation (LES) approach for fluid, one-way coupled with the equations of point-particle evolution. The channel is heated at both walls and isoflux boundary conditions are applied for fluid. Particle velocity and thermal statistics are computed. Of particular interest are the r.m.s. profiles and the probability density function of particle...
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Chapter 1. Modelling of temperature field of cylindrical pool boiling heating section
PublicationPoddano analizie fundamentalny problem określania temperatury powierzchni, na której zachodzi wrzenie. Rozpatrzono dwa przypadki ogrzewania sekcji: z zastosowaniem grzejnika patronowego oraz użyciem sekcji jako elementu oporowego. Sformułowano i rozwiązano zagadnienia brzegowe 1D, 2D ORAZ 3D. Przedstawiono wyniki obliczeń numerycznych z zastosowaniem MES.
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Population Pharmacokinetic Modelling of Filgrastim in Healthy Adults following Intravenous and Subcutaneous Administrations
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Numerical modelling of asymetric double-layer Al-Cu plate rolling process
PublicationNiekorzystnym zjawiskiem towarzyszącym procesom walcowania płaskich wyrobów bimetalowych jest krzywizna pasma na wyjściu z kotliny walcowniczej wynikająca z nierównomierności odkształcenia warstw bimetalowej blachy. Możliwość szybkiego i łatwego przeciwdziałania temu zjawisku daje wprowadzenie asymetrii prędkości bądź średnic walców roboczych. W przedstawionym artykule zaprezentowano badania komputerowe procesu walcowania blach...
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Modelling and simulation analysis of process alternatives in the cellular manufacturing of axially symmetric parts
PublicationAnalizowano procesy technologiczne (PT) alternatywnego wytwarzania określonego spektrum przedmiotów (PO) w różnych systemach gniazdowych. Rozpatrzono warianty PT z operacjami zintegrowanej obróbki wiórowej kształtującej i obróbki wykańczającej poprzez nagniatanie, oraz wariantów z różnicowaniem operacji, w których obróbka wykańczająca realizowana jest w oddzielnych operacjach szlifowania. Dla potrzeb gniazdowej dekompozycji systemów...
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Modelling of temperature field of flat boiling section with active single nucleation site
PublicationZaprezentowano główne założenia wybranych modeli wrzenia dla pojedynczego centrum nukleacji. Przedstawiony model numeryczny dotyczy zagadnienia dwuwymiarowego, osiowo-symetrycznego, nieizotropowego przewodzenia ciepła dla warunków brzegowych pierwszego, drugiego i trzeciego rodzaju. Warunek brzegowy drugiego rodzaju reprezentuje gęstość strumienia ciepła połączoną z generacją pęcherzy z pojedynczego centrum nukleacji.
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Modelling of continuum damage for application in elasto-viscoplastic Bodner-Partom constitutive equations
PublicationW artykule zaproponowano zastosowanie modelu zniszczenia Lemaitre w sprężysto-lepkoplastycznym modelu Bodnera-Partoma. Opisane podejście jest wprowadzone do programu MSC.Marc z wykorzystaniem podprocedury UVSCPL. Przedstawiono wyniki analiz numerycznych potwierdzających przyjęte założenia.
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Synthesis, biological activity and molecular modelling studies of tricyclic alkylimidazo-, pyrimido- and diazepinopurinediones
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Fractional Variable-Order Derivative and Difference Operators and Their Applications to Dynamical Systems Modelling
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Modelling the optimal delivery of spare parts to vessels: Comparison of three different scenarios
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