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Search results for: Hassel map
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Machinability investigation in electric discharge machining of carbon fiber reinforced composites for aerospace applications
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Operational analysis of threats to the security of NATO’s eastern flank. Context of hybrid activities
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Experimentation, material modelling and simulation of bonded joints with a flexible adhesive
PublicationThe paper deals with material parameters identification of a flexible adhesive and the numerical simulation of its behaviour in a single lap bonded joint. The material modelling was based on the simple shear and tensile-shear laboratory tests of the bonded joints made of thin aluminium and polyurethane plates with the flexible adhesive Terostat MS 9360 manufactured by Henkel AG & Co. The adhesive was considered as a hyperelastic...
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Mechanical and thermodynamic properties of Aβ42, Aβ40, and α-synuclein fibrils: a coarse-grained method to complement experimental studies
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Unmasking the COVID-19 pandemic prevention gains: excess mortality reversal in 2022
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Hydration phase diagram for sodium cobalt oxide NaxCoO2*yH2O
PublicationPrzedstawiony został diagram fazowy uwodnionego, sodowo kobaltowego związku tlenkowego Na0.3CoO2*yH2O. Diagram powstał w oparciu o zależność stopnia uwodnienia (y) od wilgotności względnej w temperaturze pokojowej. Zaobserwowano trzy fazy: y = 0, 0.6 i 0.13. Zauważono histerezę przy zamianie kierunku procesu uwadniania.
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A method of selecting light sources from night satellite scenes
PublicationSatellite images carries a lot of data. Very sophisticated methods of analyses may reveal very complicated nature of the observed objects. In case of night images, lights play the role of information sources. In this paper we would like to present results of the research aimed to describe light sources from satellite night images by providing description of their luminosity. The authors point source imaging data from the satellite...
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Characterization of two aminotransferases from Candida albicans
PublicationAminoadipate aminotransferase (AmAA) is an enzyme of α-aminoadipate pathway (AAP) for l-lysine biosynthesis. AmAA may also participated in biosynthesis or degradation of aromatic amino acids and in d-tryptophan based pigment production. The AAP is unique for fungal microorganisms. Enzymes involved in this pathway have specific structures and properties. These features can be used as potential molecular markers. Enzymes catalyzing...
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Bistability in a One-Dimensional Model of a Two-Predators-One-Prey Population Dynamics System
PublicationIn this paper, we study a classical two-predators-one-prey model. The classical model described by a system of three ordinary differential equations can be reduced to a one-dimensional bimodalmap. We prove that this map has at most two stable periodic orbits. Besides, we describe the bifurcation structure of the map. Finally, we describe a mechanism that leads to bistable regimes. Taking this mechanism into account, one can easily...
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SAILING ROUTE PLANNING METHOD CONSIDERING VARIOUS USER CATEGORIES
PublicationThe article describes the methodology related to determining the multi-criteria routes for sailing ships. Details of sea area discretisation and discretisation of the description of the sailing vessel properties and manoeuvring principles are shown. User requirements were specified (for five different categories of users) and on this basis the criteria for selecting the most suitable shipping route were formulated. The presented...
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Full scale measurements of pressure field induced on the quay wall by bow thrusters – indirect method for seabed velocities monitoring
PublicationThe paper presents the results of full-scale experimental investigation of loads generated on the quay wall by bow thrusters during unberthing of a self-manoeuvring vessel. The presented research allowed for the comparison of the measurements results with generally accepted empirical prediction methods and confirmed the utility of the developed measuring setup for the on-line monitoring of jet induced loads. The conclusions from the...
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Tax Policy Tools of Selected European Countries as a Mechanism for Counteracting the Effects of the Crisis Caused by the COVID-19 Disease Pandemic
PublicationCrises play an important role in a economics life. They are common and it is impossible to omit them. This following study investigates the concept of ‘crisis’ in the context of economic situation. This text describes the most important financial crises that took place in the past. After that authors passes on a detailed analysis of the actual corona-crisis and the way that it affects the economy globally. The main goal of this...
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Centra handlowo-usługowe - nowa funkcja dworców kolejowych
PublicationWobec rosnącego zapotrzebowania społecznego na dobra konsumpcyjne centra handlowe są atrakcyjnymi miejscami w miastach. Ich oddziaływanie na miasto jest widoczne i tyczy się nie tylko wpływu na drobny handel, ale również hierarchię miejskich ośrodków usługowych oraz komunikację. Jednym z atrakcyjnych przypadków lokalizacji funkcji handlowej jest dworzec kolejowy. Ważnym elementem kontroli rozwoju współczesnego handlu jest odpowiedzialne...
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Bezprzewodowy moduł detekcji źródeł dźwięku – system klasyfikatorów
PublicationMonitoring bezpieczeństwa osób starszych i chorych przebywających samotnie w pomieszczeniach można realizowaćpoprzez detekcję dźwięków nietypowych. W tym celu zbudowano moduł nasłuchujący, który analizuje dźwięki z otoczenia. Oblicza on szereg parametrów dźwięku, także bazujących na STFT i MFCC. Umożliwiają one wychwycenie i sklasyfikowanie takich odgłosów jak jęki, krzyki, kaszel oraz huki. Przedstawiono...
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wyKOMBinuj mOst
PublicationPod hasłem "wyKOMBinuj mOst" 6 marca 2008 roku na dziedzińcu południowym Gmachu Głównego Politechniki Gdańskiej odbył się konkurs dla studentów wyższych uczelni technicznych. Zadaniem trzyosobowych drużyn było skonstruowanie przęsła mostowego o rozpiętości 60 cm, z kartonu i kleju, w trakcie 5 godzin. Organizatorem konkursu było Koło Naukowe Mechaniki Budowli KoMBo, działające przy Katedrze Mechaniki Budowli i Mostów Wydziału Inżynierii...
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Ship Evolutionary Trajectory Planning Method with Application of Polynomial Interpolation
PublicationPaper presents the application of evolutionary algorithms and polynomial interpolation in ship evolutionary trajectory planning method. Evolutionary algorithms allows to find a coIlision free trajectory in real time, while polynomial interpolation allows to model smooth trajectory which keeps continuity of velocity and acceleration values along path. Combination of this two methods allows to find trajectory, which under some assumptions,...
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Wartości wskaźników finansowych opartych na przepływach pieniężnych w najmniej zagrożonych upadłością spółkach giełdowych
PublicationNiniejszy rozdział monografii prezentuje, jak w latach 2001 - 2008 najmniej zagrożone upadłością spółki giełdowe kształtowały wartości wskaźnika: zdolności do generowania operacyjnej nadwyżki pieniężnej, udziału zysku netto w operacyjnej nadwyżce pieniężnej, finansowania działalności inwestycyjnej, ogólnej wystarczalności środków pieniężnych oraz pieniężnej wydajności sprzedaży. Z osobna zostały zaprezentowane w nim wyniki badań...
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A novel approach to enhance high optically active L-lactate production from food waste by landfill leachate
PublicationThe recycling of food waste (FW) through anaerobic fermentation into lactic acid (LA), with two isomers L-LA and D-LA, aligns with the principles of a bio-based circular economy. However, FW fermentation is often limited by competing pathways, acidification inhibition, and trace metals deficiency. This study investigates the introduction of landfill leachate, containing buffering agents (ammonia) and trace metals, into FW fermentation....
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Wytwarzanie i modyfikacja powierzchni porowatych struktur tytanowych przeznaczonych na implanty
PublicationCelem pracy było wytworzenie stopu Ti-13Nb-13Zr z wykorzystaniem technologii selektywnego topienia laserowego (SLM) oraz jego biofunkcjonalizacja za pomocą utleniania mikrołukowego (MAO), a następnie określenie wpływu parametrów procesowych na właściwości otrzymanych materiałów pod kątem ich zastosowania na implanty. Oceniono wpływ napięcia, natężenia i czasu procesu MAO przeprowadzanego w elektrolicie zawierającym wapń i fosfor...
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In Search for Answers: Light4Health Online Course of Health Research for Interior Lighting Design
PublicationThree years ago, when I wrote an article in arc called: Human Centric Lighting. The New X Factor? (arc no. 108 Feb/Mar 2019), my intention was to raise questions in relation to the new topic and to find solid, research-based answers in the years to come. Today, I am happy to report that the lighting community, with the Light4Health Online Course of Health Research for Interior Lighting Design, has a useful tool, and consortium...
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Earthquake-Induced Pounding of Medium-to-High-Rise Base-Isolated Buildings
PublicationDuring earthquakes, out-of-phase vibrations in adjacent buildings with limited distance may cause pounding between them. In recent years, the use of seismic isolation has expanded considerably as an effective approach to reduce seismic damage. However, the isolated building experiences large displacements during earthquakes, and there is a possibility of collisions with adjacent structures. The research on earthquake-induced pounding...
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Spiral Search Grasshopper Features Selection with VGG19-ResNet50 for Remote Sensing Object Detection
PublicationRemote sensing object detection plays a major role in satellite imaging and is required in various scenarios such as transportation, forestry, and the ocean. Deep learning techniques provide efficient performance in remote sensing object detection. The existing techniques have the limitations of data imbalance, overfitting, and lower efficiency in detecting small objects. This research proposes the spiral search grasshopper (SSG)...
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The impact of global value chains on wages, employment, and productivity: a survey of theoretical approaches
PublicationThis study presents a systematic literature review to provide a collection of theories explaining the impact of global value chains (GVCs) on labour market outcomes. Due to the complex nature of GVCs and the interconnectedness of wages, employment, and productivity, many direct and indirect effects are at play. To ensure a transparent and systematic flow of the review process, I follow the PRISMA guide. Eventually, 36 records out...
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Adaptive dynamic control allocation for over-actuated dynamic positioning system based on backstepping method in case of thruster faults
PublicationThe objective of the research considered in this paper is dynamic positioning of a nonlinear over-actuated marine vessel in the presence of limited information about thruster forces. First, the adaptive backstepping method is used to estimate the input matrix which will compensate partial loss of actuator effectiveness in the presence of actuator dynamics. Then, the adaptive commanded virtual forces and moment are allocated into...
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Dynamic Positioning System with Vectorial Backstepping Controller
PublicationThe problem of synthesis a dynamic positioning system for low frequency model of surface vessel was considered in this paper. The recursive vectorial backstepping control design was used to keep a fixed position and heading in presence of wave disturbances. The passive observer was introduced to smooth the measurements and to estimate the velocities needed for the control algorithm. Some parameters of observer were optimized off-line...
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Simulation studies into quayside transport and storage yard operations in container terminals
PublicationThe focus of the paper is on quayside transport and storage yard operations in the sea container terminals. Developed algorithms for solving the issues of load handling and storage space allocation have been applied in the frame of adopted simulation model. The criteria chosen for decision making involved the total makespan of vessel unloading and the utilisation levels of the transportation trucks. Recommendations for unloading...
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Designing a ship course controller by applying the adaptivebackstepping method
PublicationThe article discusses the problem of designing a proper and efficient adaptive course-keeping control system for a seagoingship based on the adaptive backstepping method. The proposed controller in the design stage takes into account thedynamic properties of the steering gear and the full nonlinear static maneuvering characteristic. The adjustable parametersof the achieved nonlinear control structure were tuned up by using the...
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Miejsca handlu ulicznego w przestrzeni publicznej
PublicationHandel targowy w przestrzeni publicznej współczesnego miasta posiada różnorodne znaczenie, często stawiany jest w dwóch granicznych spojrzeniach, od formy szpecącej daną przestrzeń, po element pożądania w celu przyciągnięcia oka turysty oraz stworzenia atmosfery swojskości w przestrzeni publicznej miasta. W poniższym artykule spróbujemy się przyjrzeć tej drugiej możliwości wykorzystania handlu targowego, jako elementu mogącego...
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Bezpieczeństwo handlu elektronicznego
PublicationRozpatrzono i scharakteryzowano wielowarstwowe architektury systemów informatycznych wspomagających handel elektroniczny. Zasygnalizowano niezbędne różnego typu mechanizmy zabezpieczeń dla podstawowych usług i określonych klas zagrożeń. Główną uwagę zwrócono na podpisy cyfrowe. Na tej podstawie wprowadzono model zaufania oraz zdefiniowano metryki pozwalające na oszacowanie ryzyka przeprowadzanych transakcji. Zaprezentowano również...
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The System of the Supervision and the Visualization of Multimedia Data for BG
PublicationMonitoring of country maritime border is an important task of the Border Guard. This task can be facilitated with the use of the technology enabling gathering information from distributed sources and its supervision and visualization. The system presented in the paper is an extension and enhancement of the previously developed distributed system map data exchange system. The added functionalities allow supplementation of map data...
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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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CROWDFUNDING OF RESEARCH PROJECTS IN POLAND
PublicationCrowdfunding recently became a very popular way of funding, which allows funding almost everything, from minor personal projects to expensive commercial ones, as long as we can find investors. It may also be a new opportunity for entrepreneurial researchers, who may attract capital investment in companies that are promised to own developed technologies. Social financing of science is well suited to reduce some of the biggest problems...
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PROTOCOL FOR IN VITRO MASS PRODUCTION OF NEPHROLEPIS EXALTATA SCHOTT (BOSTON FERN)
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MICROPROPAGATION PROTOCOL OF RABBIT FOOT FERN DAVALLIA FEJEENSIS HOOK
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Can an Integrative SNP Approach Substitute Standard Identification in Comprehensive Case/Control Analyses?
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Resilience and Security in Software Defined Networking
PublicationThis paper gives an overview of the most important issues on resilience and security in Software Defined Networking
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Zastosowanie superkondensatorów w autonomicznych systemach fotowoltaicznych
PublicationSuperkondensatory (ang. supercapacitors, ultracapacitors, double-layer capacitors, gold capacitors and power capacitors) stanowią istotną nowość w energetyce prądu stałego, zwłaszcza w dziedzinie magazynowania i oddawania energii.Przy ogólnych cechach zbliżonych do cech akumulatorów superkondensatory wyróżniają się nieosiągalną dla akumulatorów zdolnością do szybkiego ładowania prądem o dużym natężeniu oraz do chwilowego, jeszcze...
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Zastosowanie superkondensatorów w autonomicznych systemach fotowoltaicznych
PublicationOpracowany we własnym zakresie, wykonany i opisany zespół układów elektronicznych, nieodzownych w wyposażeniu każdej baterii superkondensatorów stwarza wyjściowe warunki do wszechstronnych badań eksploatacyjnych kosztownej baterii. Wśród nich przedmiotem czołowych i pionierskich w kraju zainteresowań autorów jest problem efektywnej współpracy autonomicznych instalacji PV i superkondensatorów, mających szanse na całkowite wyeliminowanie...
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Acridinone antitumor agents, C-1305 and C-1299 are metabolized rather by flavin-containing monooxygenases and UDP-glucuronosyltransferases than cytochromes P450
PublicationStwierdzono, że to monooksygenazy flawinowe, a nie enzymy cytochromu P450, są głównymi enzymami frakcji mikrosomalnej, odpowiedzialnymi za detoksyfikacyjny metabolizm dwóch badanych pochodnych triazoloakrydonu. Dodatkowo C-1305 ulega sprzęganiu w czasie drugiej fazy metabolizmu z kwasem glukuronowym do postaci O-glukuronidu
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Monitoring of current collectors on the railway line
PublicationProper cooperation the current collectors and the overhead line is a pre-requisite for reliable and safe operation of railway transport. Instances of maladjustment and, in some cases, damage to the current collectors, occur between periodic inspections of the rolling stock. In order to detect such anomalies quickly, the test stand was developed, with the aim of monitoring the technical state of the current collectors under operating...
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Simplified probabilistic analysis of settlement of cyclically loaded soil stratum using point estimate method
PublicationThe paper deals with the probabilistic analysis of settlement of a non-cohesive soil layer subjected to cyclic loading. Originally, the settlement assessment is based on deterministic compaction model which requires integration of a set of differential equations. However, making use of the Bessel functions the settlement of the soil stratum can be calculated by means of simplified algorithm. The compaction model parameters were...
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Pounding Between Superstructure Segments in Multi-Supported Elevated Bridge with Three-Span Continuous Deck Under 3D Non-Uniform Earthquake Excitation
PublicationReports after severe ground motions show that the earthquake-induced structural pounding may lead to significant damage in elevated bridges. The aim of this paper is to analyse pounding between superstructure segments of a highway elevated bridge with three-span continuous deck under 3D non-uniform earthquake excitation, which is induced by spatial seismic effects related to the propagation of seismic wave. The conditional stochastic...
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Experimental investigation and process parameter optimization of sheet metal bending by line heating method
PublicationThe present study is concerned with the experimental investigation of sheet metal deforming by line heating method that incorporates the combined effect of traverse speed of the torch, thickness of the sheet metal, and the number of passes of the torch. For the numerical analysis of metal bending by line heating, the
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Automatic Identification System (AIS) Dynamic Data Integrity Monitoring and Trajectory Tracking Based on the Simultaneous Localization and Mapping (SLAM) Process Model
PublicationTo enhance the safety of marine navigation, one needs to consider the involvement of the automatic identification system (AIS), an existing system designed for ship-to-ship and shipto- shore communication. Previous research on the quality of AIS parameters revealed problems that the system experiences with sensor data exchange. In coastal areas, littoral AIS does not meet the expectations of operational continuity and system availability,...
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Review of Selected Methods for Prediction of Added Resistance in Following Waves
PublicationThe added resistance in waves is a mean value of non-linear, second order reaction of a ship to incoming waves. In the beginning of the 20th century, the experimental methods for investigation of ship hydrodynamics at model scale were developed. They allowed the evaluation of added resistance by measurements in irregular waves (directly) or by measurements in regular waves (in-direct method). The main goal was to find more precise...
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Artificial Neural Network based fatigue life assessment of riveted joints in AA2024 aluminum alloy plates and optimization of riveted joints parameters
PublicationThe objective of this paper is to provide the fatigue life of riveted joints in AA2024 aluminum alloy plates and optimization of riveted joints parameters. At first, the fatigue life of the riveted joints in AA2024 aluminum alloy plates is obtained by experimental tests. Then, an artificial neural network is applied to estimate the fatigue life of riveted lap joints based on the number of lateral and longitudinal holes, punch pressure,...
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Numerical study on pounding between two adjacent buildings under earthquake excitation
PublicationSeismic excitation, which results in large horizontal relative displacements, may cause collisions between two adjacent structures due to insufficient separation distance between them. Such collisions, known as earthquake-induced structural pounding, may induce severe damages. In this paper, the case of pounding between two adjacent buildings is studied by the application of single degree-of-freedom structural models. Impact is...
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Point cloud in archaeological and historical survey
PublicationIn the last decade the potential of using the point clouds in archaeological research has been noted. Therefore, a number of guidelines concerning aspects of data acquisition (resolution and format) were developed. They also included the way of searching the imaged area to identify archaeological and historical cultural heritage sites. The purpose of this research was to analyze the point cloud for selected woodland survey. Forest...
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Multi-agent large-scale parallel crowd simulation with NVRAM-based distributed cache
PublicationThis paper presents the architecture, main components and performance results for a parallel and modu-lar agent-based environment aimed at crowd simulation. The environment allows to simulate thousandsor more agents on maps of square kilometers or more, features a modular design and incorporates non-volatile RAM (NVRAM) with a fail-safe mode that can be activated to allow to continue computationsfrom a recently analyzed state in...
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Comparative Assessment of Geomorphological and Landscape Features Around the Small Aral Sea
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