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Search results for: PANTOGRAPHIC STRUCTURES
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Low-Cost Data-Driven Surrogate Modeling of Antenna Structures by Constrained Sampling
PublicationFull-wave electromagnetic (EM) analysis has become one of the major design tools for contemporary antenna structures. Although reliable, it is computationally expensive which makes automated simulation-driven antenna design (e.g., parametric optimization) difficult. This difficulty can be alleviated by utilization of fast and accurate replacement models (surrogates). Unfortunately, conventional data-driven modeling of antennas...
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The Revitalization Processes of the Port Structures in Gdynia and Gdansk on the Background of Contemporary Port Changes
PublicationTransformations of the port facilities against the modernization of the port structures are present in many city-port centers since more than 50 years. The modernization taking place in the ports located in Gdynia-Gdansk mainly concerns communication availability and adapted to the multimodal technology of transport and transshipment. Developing specialized tech-terminals serving a specific type of load, causes development of the...
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Particle Shape Effect on Macroscopic Behaviour of Underground Structures: Numerical and Experimental Study
PublicationThe mechanical performance of underground flexible structures such as buried pipes or culverts made of plastics depend not only on the properties of the structure, but also the material surrounding it. Flexible drains can deflect by 30% with the joints staying tight, or even invert. Large deformations of the structure are difficult to model in the framework of Finite Element Method, but straightforward in Discrete Element Methods....
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Destruction of shell structures under the dynamic load on the human skull trauma basis
PublicationThe main aim of this work is to investigate patterns of potential orbital bone fractures due to mechanical injuries. The solution of the main problem is followed by analysis of several testing examples having straight correlation with civil engineering structures, in which materials of wide range of stiffness are applied. To solve the main problem, the three-dimensional finite element method (FEM) model of the orbital region has...
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ECOLOGY OR ECONOMICS? THE ASPECT DETERMINING THE USE OF DISPLACEMENT PILES FOR THE FOUNDATIONS OF BRIDGE STRUCTURES
PublicationW ostatnich latach rzadko wykonuje się pale wiercone o bardzo dużych średnicach ze względu na: wymagany sprzęt, transport wydobytego urobku gruntowego, duże ilości stali zbrojeniowej. Konstrukcje inżynierskie na autostradzie A-1, na drodze ekspresowej S-7 i Obwodnicy Południowej Gdańska posadowiono na palach prefabrykowanych. Fundamenty największych mostów na autostradzie A-1 zbudowano na palach Vibro i Franki. W artykule zwrócono...
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Investigations of vortex structures in granular materials under earth pressure conditions by DEM
PublicationW artykule pokazano rozwój wirów na poziomie ziarna materiału granulowanego podczas parcia pasywnego piasku na sztywną ściankę przemieszczającą się poziomo. Obliczenia wykonano stosując metodę DEM. Przyjęto 3 różne sposoby wyznaczenia wirów i ich czestotliwości.
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Incremental Dynamic Analysis and Fragility Assessment of Buildings with Different Structural Arrangements Experiencing Earthquake-Induced Structural Pounding
PublicationStructural pounding is considered as one of the most critical phenomena occurring during earthquakes. This paper presents the incremental dynamic analysis and fragility assessment of buildings experiencing earthquake-induced pounding. Three 3-D buildings with different number of storeys and under different structural arrangements have been considered. Three pounding scenarios have been taken into account, i.e. pounding between...
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Triangular 3D Laser Scanning in Underwater Photogrammetry
PublicationThe use of triangular 3D laser scanning may significantly enhance the visual inspection of underwater objects. In these days of high demand for accurate information, exclusively photographic documentation is not enough, as it is geometrically flawed. The authors of this article are trying to present the rudiments of laser scanning, a modern means of measuring, which is reliable, relatively easy to use and works in accordance with...
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Budowa niskokalorycznych strukturyzowanych lipidów otrzymanych na drodze enzymatycznego przeestryfikowania oleju rzepakowego i oleiny palmowej kwasem behenowym. The structure of low-calorie structured lipids obtained by enzymatic interestrification of rapeseed oil and palm oil with behenoic acid.
PublicationNiskokaloryczne strukturyzowane lipidy otrzymano na drodze wbudowywania kwasu behenowego, charakteryzującego się niską strawnością, w pozycje sn-1,3 triacylogliceroli dwóch rodzajów oleju rzepakowego oraz oleiny polmowej. Reakcje acydolizy przeprowadzono w obecności biokatalizatora Lipozyme RM IM przez 3 godziny w temp. 72st.C. Otrzymane produkty po usunięciu wolnych kwasów tłuszczowych rozdzielono w kolumnie chromatograficznej...
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Numerical study of lasing modes of periodically structured active nanowires
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New synthesis method of sword-sheath structured carbon nanotubes
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Experimental comparison of UML-HAZOP inspection and non-structured review
PublicationArtykuł przedstawia eksperyment przeprowadzony na Politechnice Gdańskiej mający na celu porównanie dwóch technik przeglądowych. Poszczególne rozdziały zawierają: ogólne omówienie tematyki przeglądów i inspekcji, przedstawienie metody UML-HAZOP, opis przebiegu eksperymentu oraz uzyskanych rezultatów.
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Structured deformation of granular material in the state of active earth pressure
PublicationThe paper focuses on the ability of granular materials to undergo structured deformation by analysing the data from the retaining wall model tests and discrete element simulations. The structured deformation means the movement of a granular material which produces a stable, regular pattern of multiple shear bands. The paper's primary purpose is to study this kind of deformation for the selected data representing the state of active...
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Physical properties and electronic structure of La3Co and La3Ni intermetallic superconductors
PublicationLa3Co and La3Ni are reported superconductors with transition temperatures of 4.5 and 6 K, respectively. Here, we reinvestigate the physical properties of these two intermetallic compounds with magnetic susceptibility χ, specific heat Cp and electrical resistivity ρ measurements down to 1.9 K. Although bulk superconductivity is confirmed in La3Co, as observed previously, only a trace of it is found in La3Ni, indicating that the...
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Magnetic structure and properties of theS=5∕2triangular antiferromagnetα−NaFeO2
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Coupling coefficients for the space group of the hexagonal close-packed structure
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Reconstruction of 3D structure of positive corona streamer by local methods
PublicationThe computer algorithms were used for reconstruction of streamer 3D structure. We propose the 3D tree structure model of corona discharge streamer composed with nodes and edges between chosen couples of nodes, which enables easy computation of some important parameters ofstreamers. The 3D model can be derived directly from two projection images by global methods like evolutionary searching or particle simulations. In this paper...
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Energy Level Structure of Bi3+ in Zircon and Scheelite Polymorphs of YVO4
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Pasta Fortified with Potato Juice: Structure, Quality, and Consumer Acceptance
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Dendrimer Structure Diversity and Tailorability as a Way to Fight Infectious Diseases
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Finely comminuted frankfurters fortified with potato juice – Quality and structure
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Coupling coefficients for the space group of the hexagonal close-packed structure
PublicationWe have computed the Clebsch-Gordan coefficients of the representations for the space group of the hexagonal close-packed structure for the points:V, A, H, K, L, M. We enumerate all arms of the wave vector stars and all wave vector selection rules.
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Investigation of hyperfine structure of several major lines in PbI and PbII
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Hyperfine structure and isotope shift study in singly ionized lead
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The Relationship between the Structure and Properties of Amino Acid Ionic Liquids
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Mechanical model of fascia-implant structure. Finite element simulation.
PublicationPraca dotyczy modelowania i symulacji syntetycznych implantów chirurgicznych stosowanych w leczeniu przepulin brzusznych metodą laparoskowpową. Prponowane są modele matematyczne a ich prawidłowość weryfikowana jest na podstawie badań doświadczalnych zachowania się modeli fizycznych wszczepionych implantów pod wpływem obciążeń wynikających z fizjologii człowieka. Nakreślona jest metodologia oceny trwałości połączenia siatki chirurgicznej...
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Damage localisation in a stiffened plate structure using a propagating wave
PublicationThe paper presents an application of changes in propagating waves for damage detection in a stiffened aluminium plate. The experimental investigation was conducted on an aluminium plate with riveted two L-shape stiffeners. The wave has been excited with a piezoelectric transducer and measured with the Laser Scanning Doppler Vibrometer. Recorded signals were analysed using the special signal processing techniques developed for damage...
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Electronic structure and charge distribution in DyBa2Cu3O7: The ab initio approach
PublicationW pracy wykonano obliczenia kwantowomechaniczne struktury elektronowej nadprzewodzącego materiału DyBa2Cu3O7 (Dy123) metodą FP-LAPW (full potential - linearized augmented plane wave) w ramach formalizmu DFT (density functional theory) stosując przybliżenie GGA (generalized gradient approximation). Ze względu na silne oddziaływania korelacyjne elektronów 4f w atomie Dy zastosowano dodatkowo poprawkę kulombowską U w ramach modelu...
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Cadmium inhibitory action leads to changes in structure of ferredoxin:NADP+ oxidoreductase
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Structure and function of natural proteins for water transport: general discussion
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Assessment of chemical‐crosslink‐assisted protein structure modeling in CASP13
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Quantitative structure-(chromatographic) retention relationship models for dissociating compounds
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Hydrothermal, microwave and mechanochemical modification of amorphous zirconium phosphate structure
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Modification of Tin Phosphate Nanoporous Structure under Hydrothermal Conditions
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Analysis of structure and properties of DVB–GMA based porous polymers
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Membrane structure and interactions of peptide hormones with model lipid bilayers
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Tests of local strains in steel laser - welded sandwich structure
PublicationW publikacji zaprezentowano rezultaty badań odkształceń w strefie spoiny laserowej konstrukcji sandwich. Pokazano obiekt badań, metodykę i oprzyrządowanie oraz proces rejestracji. Przedstawiono uzyskane wyniki i wnioski z nich wypływające.
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FEM strength analysis of sandwich panels for ship structure applications
PublicationW publikacji zaprezentowano wyniki analizy numerycznej stalowego panelu sandwich obciążonego siłami ściskającymi wzdłuż laserowo spawanych usztywnień. Przedstawiono sposób modelowania, pokazano i przedyskutowano uzyskane rezultaty.
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Synthesis and structure-activity studies of peptide-acridine/acridone conjugates
PublicationW artykule opisano strukturę, syntezę i biologiczną aktywność peptydowych koniugatów akrydyny i akrydonu jako potencjalnych leków o aktywności przeciwnowotworowej i przeciwwirusowej.
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Farrow structure for complex digital Hilbert filter of low complexity
PublicationW pracy przeanalizowano złożoność numeryczną filtru Hilberta (filtr zespolony), złożonego z pary filtrów cyfrowych o zmiennym opóźnieniu ułamkowym, o strukturze Farrowa. Struktura ta pozwala na zmianę opóźnienia ułamkowego na bieżąco, bez potrzeby każdorazowego przeprojektowywania filtru. Zaproponowano algorytmy/struktury wykorzystujące nie tylko symetrię oryginalnej struktury Farrowa, ale również wspólne elementy opóźniające podfiltrów...
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An Analysis of Elliptical-Rectangular Patch Structure on Multilayer Elliptic Cylinders
PublicationThe resonance frequency problem of an ellipticalrectangular patch mounted on multilayered dielectric coated elliptic conducting cylinder, is investigated in this paper. A fullwave analysis and a moment-method calculation are employed. The analysis is carried out considering the expansion of the field as a series of Mathieu functions. An additional theorem for Mathieu functions is utilized to investigate the non-confocal ellipse...
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Resonance in Rectangular Microstrip Structure Loaded with a Pseudochiral Medium Layer
PublicationA rectangular microstrip structure with multilayer substrate containing dielectric and pseudochiral medium layers is studied in this paper. The effect of Omega medium layer location in the substrate and its thickness on the complex resonant frequency of the rectangular microstrip structure is investigated.
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Transition Metal Oxides influence on phosphate and borate glasses structure
PublicationBorate and phosphate glasses possess many potential luminescence and optical applications. With their low melting point, they are one of the most often studied amorphous materials. In recent years these glasses, doped with transition metal oxides (TMO), gained much attention due to their tunable structural and thermal properties. Review of systems containing TMOs was presented. Additionally synthesis of binary MnO-P2O5 and MnO-B2O3...
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Behaviour of Asymmetric Structure with Base Isolation Made of Polymeric Bearings
PublicationEarthquake-induced ground motions are the most severe and unpredictable threats to the structures all around the world. Seismic excitations cause a lot of damage in a wide variety of ways, leaving thousands of casualties in their wake. Due to randomness of earthquake occurrence, lack of visible causes and their power of destructiveness, structural engineers need to develop new technical solutions and protection systems against...
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Tuning the sumanene receptor structure towards the development of potentiometric sensors
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Temperature-induced changes of HtrA2(Omi) protease activity and structure
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THE INFLUENCE OF THE TYPE SOLVENT ON THE STRUCTURE OF CHITOSAN BLENDS WITH HYALURONIC ACID
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Controlled Drug Release by the Pore Structure in Polydimethylsiloxane Transdermal Patches
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Research Progress and Knowledge Structure of Inclusive Growth: A Bibliometric Analysis
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Symmetrical and unsymmetrical azomethines with thiophene core: structure–properties investigations
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