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The Use of Gravimetric Measurements to Determine the Orthometric Height of the Benchmark in the Port of Gdynia
PublikacjaThis paper contains a description of the technology used to make gravimetric measurements of the height of a reference point located in the Port of Gdynia, Poland. Measurements were made using a CG-5 gravimeter manufactured by LaCoste & Romberg Scintrex Inc., and determinations of position used a Leica Viva GS15 receiver integrated with a network of HxGN SmartNet GNSS reference stations. The measuring methodology required gravimeter...
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Description of parameters of symmetrical prolate ellipsoid magnetic signature.
Dane BadawczeThe Earth magnetic field (Fig.1): BE – total magnetic flux density, BEx – x component of the Earth magnetic flux density, BEy = 0 y component of the Earth magnetic flux density, BEz – z component of the Earth magnetic flux density, I – inclination of the Earth magnetic field.
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Parameters of land reference points in the Gdynia region and the Free-air anomaly grid of the South Baltic
Dane BadawczeThe data was registered during the campaign to verify the catalog value of the absolute point coordinates [point 5403 (POLREF-GORA DONAS)] of the national gravimetric control network. The data was recorded in two three-hour stationary measurement campaigns at the following points: Rozewie of the EUREF-POL network, Góra Donas POLREF, and mareograph points...
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Video traffic data - Interchanges Podwarpie (S1-86) - Entry + exit lanes, Poland
Dane BadawczeThe data includes video traffic data registered with 4 video cameras on entry or exit lanes of the Podwarpie interchange within S1 expressway in Poland (interchange of expressway S1 and national road 86), located in the Silesian Agglomeration). The data covers the one day: 23.05.2017 (expressway S1).
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Video traffic data - Interchange Podwarpie (S1-86) - weaving, Poland
Dane BadawczeThe data includes video traffic data registered with 4 video cameras at weaving area (weaving section type A) of the Podwarpie interchange within S1 expressway in Poland (interchange of expressway S1 and national road 86), located in the Silesian Agglomeration. The data covers the one day: 23.05.2017 (road 86).
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Video traffic data - Interchanges Grota Roweckiego (S86 - Grota Roweckiego)
Dane BadawczeThe data includes video traffic data registered with 2 video cameras at entry and exit lanes of the Grota Roweckiego interchange within S86 expressway in Poland (interchange of expressway S86 and Grota Roweckiego street), located in the Silesia Agglomeration. The data covers the one days: 23.05.2017 (expressway S86). The video cameras installed on the...
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UAV Survey Images - 3D Model - Gdansk Church Pw. Św. Wojciecha - MP2
Dane BadawczeDataset description: Raw images from photogrammetric survey. Object: Kościół Rzymskokatolicki Pw. Św. WojciechaLocation: Gdansk, Pomerania, PolandDrone type: DJI Mavic Pro 2Flight plan: Circle (Point Of Interest) + Free flightTarget Product: 3D ModelDate: 02.04.2022Direct georeferencing: yesMetadata data: yes/GPSGCP: YESGCP Quality: RTKCamera Name:...
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Cyanobacterial blooms in the Gulf of Gdańsk - photo archvive
Dane BadawczeCyanobacterial blooms are recorded in the Gulf of Gdańsk every summer. The dataset contains 20 photographs of the blooms of these microorganisms taken between 2004 and 2012. In addition to the photos, the dataset also contains a file with supporting information, such as the coordinates of the point where the photo was taken, the salinity and temperature...
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LIDAR data from the measurement of a WD113 bridge structure
Dane BadawczeThe measurement data was obtained during research related to the utilization of LiDAR observations to assess the condition of bridge structures. The provided data comes from measurements of viaduct WD113 located along a newly built national road near the town of Koszalin. The acquired point cloud constitutes an integral set of information regarding...
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Wybór operatora usług VOIP
PublikacjaW pracy przedstawiono propozycje algorytmu wyboru operatora VoIP, zapewniającego w danym momencie realizację połączenia o najlepszej jakości. Weryfikacja jakości realizowanego połączenia została dokonana metodami subiektywnymi. Zaproponowane 2 metody wyboru najlepszego operatora wykorzystują: pomiar maksymalnego opóźnienia przechodzenia danych z/do operatora (w oparciu o usługę PING) oraz pomiar czasu trwania zestawiania połączenia...
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Autonomous pick-and-place system based on multiple 3Dsensors and deep learning
PublikacjaGrasping objects and manipulating them is the main way the robot interacts with its environment. However, for robots to operate in a dynamic environment, a system for determining the gripping position for objects in the scene is also required. For this purpose, neural networks segmenting the point cloud are usually applied. However, training such networks is very complex and their results are unsatisfactory. Therefore, we propose...
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Autonomous Perception and Grasp Generation Based on Multiple 3D Sensors and Deep Learning
PublikacjaGrasping objects and manipulating them is the main way the robot interacts with its environment. However, for robots to operate in a dynamic environment, a system for determining the gripping position for objects in the scene is also required. For this purpose, neural networks segmenting the point cloud are usually applied. However, training such networks is very complex and their results are unsatisfactory. Therefore, we propose...
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Polityka i strategia finansowa w jednostkach samorządu terytorialnego
PublikacjaArtykuł przybliża zagadnienia polityki finansowej prowadzonej przez jednostki samorządu terytorialnego. Odnosi się także do terminów polityka i strategia, które w praktyce samorządu wzajemnie się nakładają. Autor precyzuje poszczególne elementy polityki finansowej oraz uściśla podmioty tej polityki na szczeblu gminy, powiatu i województwa. Artykuł kończą wnioski autora wskazujące, że jednostki samorządu terytorialnego nie są zwolnione...
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Bezpieczeństwo ruchu drogowego na arteriach miejskich
PublikacjaBezpieczeństwo ruchu na arteriach miejskich jest bardzo istotnym problemem, gdyż na tych ulicach skupia się najwięcej wypadków i ich ofiar. Aglomeracje miejskie i powiaty grodzkie mają do odegrania istotną rolę w zmniejszeniu liczby śmiertelnych wypadków drogowych w Polsce, co jest elementem Krajowego Programu BRD GAMBIT 2005. W niniejszej pracy przedstawiono wstępne wyniki badań czynników wpływających na bezpieczeństwo ruchu drogowego,...
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Bezpieczeństwo ruchu drogowego na arteriach miejskich.
PublikacjaBezpieczeństwo ruchu na arteriach miejskich jest bardzo istotnym problemem, gdyż na tych ulicach skupia się najwięcej wypadków i ich ofiar. Aglomeracje miejskie i powiaty grodzkie mają do odegrania istotną rolę w zmniejszeniu liczby śmiertelnych wypadków drogowych w Polsce, co jest elementem Krajowego Programu BRD GAMBIT 2005. W niniejszej pracy przedstawiono wstępne wyniki badań czynników wpływających na bezpieczeństwo ruchu drogowego,...
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Zintegrowany regionalny system gromadzenia i analizy danych energetyczno-środowiskowych
PublikacjaPrzedstawiono strukturę serwisu internetowego ewidencji opłat za użytkowanie środowiska systemu. Częścią systemu jest baza danych wykorzystywana jako narzędzie ewidencji zużycia energii i emisji zanieczyszczeń w podziale na powiaty, sektory gospodarki i paliwa. Dane zbierane w systemie mogą być wykorzystane do obliczeń depozycji zanieczyszczeń i oceny zagrożenia ekosystemów za pomocą polskiej wersji modelu RAINS. Model ten na drodze...
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Fractional Problems with Right-Handed Riemann-Liouville Fractional Derivatives
PublikacjaIn this paper, we investigate the existence of solutions for advanced fractional differential equations containing the right-handed Riemann-Liouville fractional derivative both with nonlinear boundary conditions and also with initial conditions given at the end point T of interval [0,T ]. We use both the method of successive approximations, the Banach fixed point theorem and the monotone iterative technique, as well. Linear problems...
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Wykład prof. dr. hab. Grzegorza Kołodko
WydarzeniaWykład odbędzie się 17 maja (wtorek) o godzinie 14.30, w sali konferencyjnej w budynku Hydromechaniki (nr 11).
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Study of particle - bubble interaction using atomic force microscopy - current possibilities and challenges
PublikacjaBadania oddziaływań pomiędzy cząstkami mineralnymi i pęcherzykami powietrza są kluczowe do zrozumienia przebiegu flotacji. Wykorzystanie mikroskopii sił atomowych (AFM) i techniki próbnika koloidalnego umożliwia pomiar takich oddziaływań.
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Fractional problems with advanced arguments
PublikacjaThis paper concerns boundary fractional differential problems with advanced arguments. We investigate the existence of initial value problems when the initial point is given at the end point of an interval. Nonhomogeneous linear fractional differential equations are also studied. The existence of solutions for fractional differential equations with advanced arguments and with boundary value problems has been investigated by using...
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COVID-19 in Pediatric Intensive Care Units in Poland, PAPITCO-19 Study (Polish Analysis of PICU Trends during COVID-19)
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The Quick Measure of a Nurbs Surface Curvature for Accurate Triangular Meshing
PublikacjaNURBS surfaces are the most widely used surfaces for three-dimensional models in CAD/CAE programs. As a model for FEM calculation is prepared with a CAD program it is inevitable to mesh it finally. There are many algorithms for meshing planar regions. Some of them may be used for meshing surfaces but it is necessary to take the curvature of the surface under consideration to avoid poor quality mesh. The mesh must be denser in the...
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INCREASING THE COUNTRY'S SECURITY AND PUBLIC TRANSPORT ACCESSIBILITY BY CREATING A NETWORK OF SMALL AIRPORTS
PublikacjaIt has been shown that by creating a network of small airports, it is possible to increase the communication accessibility of large population groups and the country's security, including safety at sea. The airports mentioned above may also be located on land considered to be weak from an engineering point of view. These include, for example, wetlands, swamps, flood embankments, poor coastal belt grounds, and reclaimed land. A...
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The Influence of Stretch Rod Speed on the Relationship between Preblown Bottle Aesthetic Quality and Final Blown Bottle Thickness Profile in Stretch Blow Molding from Preform Process
PublikacjaFrom a mechanical point of view, the aesthetic quality of preblown PET bottles and thickness profile of final blown PET bottles manufactured in ISBM process are determined by mechanical and thermal response of blown preforms. From the microscopic point of view the biggest influence on the mechanical and thermal properties of PET bottles have orientation and crystallization processes. From a technological point of view, the aesthetic...
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Measurements and Analysis of Motor Supplying Current Waveform for Diagnostic Purposes
PublikacjaPodano proponowaną metodę diagnostyki łożysk tocznych w silnikach indukcyjnych poprzez pomiar i analizę prądu zasilającego. Przedstawiono opracowany system pomiarowy oraz wyniki badań na łożyskach o specjalnie wprowadzonych uszkodzeniach.
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Data obtained by computation for X-ray imaging of grating without magnification using oriented Gaussian beams
Dane BadawczeThe propagation of X-ray waves through an optical system consisting of grating and X-ray refractive lenses is considered. In this approach, the propagating wave is represented as a superposition of the oriented Gaussian beams. The direction of wave propagation in each Gaussian beam is consistent with the local propagation direction of the X-ray wavefront.
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Minimal number of periodic points for smooth self-maps of simply-connected manifolds
Dane BadawczeThe problem of finding the minimal number of periodic points in a given class of self-maps of a space is one of the central questions in periodic point theory. We consider a closed smooth connected and simply-connected manifold of dimension at least 4 and its self-map f. The topological invariant D_r[f] is equal to the minimal number of r-periodic points...
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Data obtained by computation for X-ray imaging of grating with magnification factor equal 2 using oriented Gaussian beams
Dane BadawczeThe propagation of X-ray waves through an optical system consisting of grating and X-ray refractive lenses is considered. In this approach, the propagating wave is represented as a superposition of the oriented Gaussian beams. The direction of wave propagation in each Gaussian beam is consistent with the local propagation direction of the X-ray wavefront.
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Data obtained by computation for X-ray imaging of grating with magnification factor equal 4 using oriented Gaussian beams
Dane BadawczeThe propagation of X-ray waves through an optical system consisting of grating and X-ray refractive lenses is considered. In this approach, the propagating wave is represented as a superposition of the oriented Gaussian beams. The direction of wave propagation in each Gaussian beam is consistent with the local propagation direction of the X-ray wavefront.
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Data obtained by computation for X-ray imaging of grating with magnification factor equal 8 using oriented Gaussian beams
Dane BadawczeThe propagation of X-ray waves through an optical system consisting of grating and X-ray refractive lenses is considered. In this approach, the propagating wave is represented as a superposition of the oriented Gaussian beams. The direction of wave propagation in each Gaussian beam is consistent with the local propagation direction of the X-ray wavefront.
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Video traffic data - Interchange Lotnisko (S2-S79) - Exit +entry lanes, Poland
Dane BadawczeThe data includes video traffic data registered with 8 video cameras at entry or exit lanes of the Lotnisko interchange within S2 expressway in Poland (interchange of expressway S2 and expressway S79), located in the Warsaw Agglomeration. The data covers the one day: 05.09.2017 (expressway S2).
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Immersive 3D visualization laboratory concept
PublikacjaArtykuł opisuje koncepcję realizowanego na Politechnice Gdańskiej urządzenia do marszu przez świat wirtualny. Będzie ono miało postać przezroczystej sfery obrotowej, którą użytkownik umieszczony w środku będzie obracał własnymi krokami (na wzór chomika biegnącego w kołowrotku). Sfera będzie umieszczona wewnątrz sześcianu zbudowanego z ekranów, na których będzie wyświetlany obraz stereoskopowy przedstawiający świat wirtualny z punktu...
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Reliability assessment of truss towers using Monte Carlo Method, PEM and RSM
PublikacjaThe paper discusses the reliability assessment of simple random truss structures using three different probabilistic methodologies: the Monte Carlo method, the Point Estimate Method and the Response Surface Method. A benchmark truss structure example is analyzed. A set of numerical calculations of critical load is performed and the results are taken as the basis of advanced probabilistic calculations. Using the samples, numerical...
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Influence of datasets decreased by applying reduction and generation methods on Digital Terrain Models
PublikacjaThe number of point clouds provided by LiDAR technology can be sometimes seen as a problem in development and further processing for given purposes (e.g. Digital Terrain Model (DTM) generation). Therefore, there is still a need to reduce the obtained big datasets. Reducing can be done, inter alia, by reducing the size of the set or by generating the set. This paper presents two variants of the reduction of point clouds in order...
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Investigation on accelerated impedance spectrum measurement method with multisine signal stimulation
PublikacjaThe paper presents an investigation on the accelerated impedance spectrum measurement method, oriented at parameter identification of technical objects modelled by a linear equivalent circuit, e.g. anticorrosion coatings.The method is based on multisine signal stimulation of an object and response analysis by triangle window filterbanks.It has several advantages, as compared with conventional point-by-point spectrum measurement....
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Dynamics of Field Line Mappings in Magnetic Flux Tubes
PublikacjaWe study the topological constraints on the dynamics of magnetic field lines in flux tubes. Our approach is based on the application of the topological invariant: fixed point index. We consider periodic flux tubes and find various restrictions on the field lines that come from the sequence of fixed point indices of iterations. We also analyze the case of a tube with a cylindrical obstacle, deducing some special dynamical properties...
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Udokładnianie pomiaru częstotliwości krótkich obserwacji sinusoidy przy użyciu filtracji cyfrowej
PublikacjaW pracy pogłębiono i przebadano koncepcję metody pomiaru częstotliwości krótkiego fragmentu zaszumionego sygnału sinusoidalnego wykorzystującą filtrację cyfrową do zwiększania dokładności pomiaru. Podstawowy pomiar realizowany jest z użyciem transformaty DFT. Pomiar ten w przypadku krótkich sygnałów nie oferuje jednak wystarczającej dokładności. Dlatego w omawianej metodzie wprowadzono dodatkowy etap udokładniania częstotliwości....
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Resource constrained neural network training
PublikacjaModern applications of neural-network-based AI solutions tend to move from datacenter backends to low-power edge devices. Environmental, computational, and power constraints are inevitable consequences of such a shift. Limiting the bit count of neural network parameters proved to be a valid technique for speeding up and increasing efficiency of the inference process. Hence, it is understandable that a similar approach is gaining...
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Digital measurements of the feedback signals for observing behaviour of a drive.
PublikacjaW pracy omówiono sposoby badań przebiegu ruchu realizowanego przez napęd, w tym poprzez pomiar sygnałów sprzężeń zwrotnych. Przedstawiono różne typy błędów pomiaru sygnałów sprzężeń zwrotnych i ich oddziaływanie na wyniki.
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An analysis of domain-based ship collision risk parameters
PublikacjaAccording to a lot of contemporary research on ship collision avoidance the classic approach parameters – distance at closest point of approach (DCPA) and time to the closest point of approach (TCPA) – are not sufficient for estimating ship collision risk and for planning evasive manoeuvres. Consequently new measures are introduced, often utilizing the concept of a ship domain. Their drawback, up to this point, was the lack of...
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TIME-AND-SPACE STRUCTURE OF FORCE-DRIVEN RIGID SPHEREWAVEFIELD
PublikacjaThis paper introduces a time-domain, causality-inspired description of a vector-source acoustic wavefield of arbitrary time evolution, where a sphere is a practical realisation of quasi-point contact surface without which a point force would not be able to exert an impact onto non-viscous fluid. At every space location, the resulting acoustic field is described by a pair of physical variables characterising the time evolution of...
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Nanometer structural columns and frustration of magnetic ordering in Nb12O29
PublikacjaDyskutowana jest synteza i właściwości magnetyczne tlenku niobu Nb12O29. Polimorfizm Nb12O29 przejawia się występowaniem dwóch faz: jednoskośnej i ortorombowej. Pomiar podatności magnetycznej pokazuje, że faza jednoskośna wykazuje antyferromagnetyczne przejście ok. 12K.
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Influence of Shunt Compensation with SVC Devices on Resonance Risk in Power Systems
PublikacjaMany analyses are required to locate a new reactive power source in a power system. The choice of a location is a very complex matter which requires various aspects to be considered. Selecting a location also entails the necessity to assess it from the point of view of the selected compensator’s structure as well as the system’s performance in various states with the new device on. The paper presents the issues of assessing compensator...
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On Applications of Fractional Derivatives in Circuit Theory
PublikacjaIn this paper, concepts of fractional-order (FO) derivatives are discussed from the point of view of applications in the circuit theory. The properties of FO derivatives required for the circuit-level modelling are formulated. Potential problems related to the generalization of transmission line equations with the use of FO derivatives are presented. It is demonstrated that some of formulations of the FO derivatives have limited...
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APPLYING RANSAC ALGORITHM FOR FITTING SCANNING STRIPS FROM AIRBORNE LASER SCANNING
PublikacjaDuring the development of the data acquired by airborne laser scanning the important issue is the fitting and georeferencing of ALS point clouds by means of the tie surfaces and the reference planes. The process of scanning strips adjustment is based on mutual integration of point clouds (scanning strips) and their adaptation to the reference planes.In simultaneous adjustment all strips are combined into one geometrically coherent...
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Comparison of the number of foreigners registered for retirement and disability pension insurance - at the end of the year
Dane BadawczeThe increase in the number of foreigners registered for retirement and disability insurance was characterized by the highest dynamics in the case of non-EU migrants, in particular Ukrainian citizens (26-time increase in the period 2008-2018; impressive nominal growth from 16.2 to 420.7 thousand economic migrants) and Georgia (a 37-time increase). Also...
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Electrical measurements of the dewetting of metal thin films
Dane BadawczeIn situ observations of dewetting of thin films is very complicated. One of the method, that helps to observe it, could be electrical measurements. For experiments, thin gold, silver and gold-silver nanoalloy films were deposited by magnetron sputtering method. Films were deposited on a Corning glass substrates. Samples were measured by four point method...
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Dold sequences, periodic points, and dynamics
PublikacjaIn this survey we describe how the so-called Dold congruence arises in topology, and how it relates to periodic point counting in dynamical systems.
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Displacements of bones during bending test of first metatarsophalangeal joint after arthrodesis with medially or dorsally positioned locking plate and lag screw.
Dane BadawczeThe Dataset contains the values of displacements of bone control points during the bending test of first metatarsophalangeal (MTP1) joint specimens after arthrodesis.
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Place attachment, place identity, and visual pollution sensitivity.
Dane BadawczeThe data include individual responses on the following scales (1) place attachment, (2) place identity, and (3) visual pollution sensitivity. Each line represents responses obtained from one participant and his or her demographic characteristics. like gender, age, and education level.