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Search results for: BOUNDARY ELEMENT METHOD
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FIR Filter Design Using Distributed Maximal Flatness Method
PublicationIn the paper a novel method for filter design based on the distributed maximal flatness method is presented. The proposed approach is based on the method used to design the most common FIR fractional delay filter - the maximally flat filter. The MF filter demonstrates excellent performance but only in a relatively narrow frequency range around zero frequency but its magnitude response is no greater than one. This ,,passiveness”...
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A Method for Optimising the Blade Profile in Kaplan Turbine
PublicationThis paper introduces a method of blade profile optimisation for Kaplan-type turbines, based on modelling the interaction between rotor and stator blades. Rotor and stator blade geometry is described mathematically by means of a midline curve and thickness distribution. Genetic algorithms are then used to find a global optimum that minimises the loss coefficient. This allows for variety of possible blade shapes and configurations....
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Galerkin Finite Element Process for Entropy Production and Thermal Evaluation of Third-Grade Fluid Flow: A Thermal Case Study
Publication: A fluid’s moving class improves its heat transmission capability, as well as its rigidity, owing to multivariate molecule suspension. In this way, nanofluids are superior to common fluids. In this study, we evaluated the features of ease and heat transfer. Furthermore, we investigated permeable media, heat source, variable heat conductivity, and warm irradiation results. A mathematical technique known as the Galerkin finite element...
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Proposed method for estimating the costs of safety barrier life cycle
PublicationToday barrier types are frequently selected for their price with little regard for the total costs the structure will incur over its lifetime. One of the basic tools designed to manage road infrastructure is the life cycle cost method (LCC, Life cycle cost). It sums up the costs to plan, design, build, operate (use and maintain) and decommission a road structure. Having developed dynamically at the turn of the century the method...
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Driver fatigue detection method based on facial image analysis
PublicationNowadays, ensuring road safety is a crucial issue that demands continuous development and measures to minimize the risk of accidents. This paper presents the development of a driver fatigue detection method based on the analysis of facial images. To monitor the driver's condition in real-time, a video camera was used. The method of detection is based on analyzing facial features related to the mouth area and eyes, such as...
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Extending transition curve in analytical design method
PublicationThe paper presents the problem of extending the transitional curves, using for this purpose an analytical design method. The basis for the analysis of numerical calculations were carried out for a wide set of parameters characterizing the standard geometric system. We considered an importance of the size of radius of the circular arc and return angle of route on the obtained results after the formulation of appropriate theoretical...
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Innovative method for utilization of wastewater for security and safety in rural areas
PublicationIn the rural areas building of sewerage systems and central wastewater treatment plants (WWTPs) often brings too high costs, due to high distances from one farm to another and terrain configuration. Individual treatment systems for each farm are a good solution. The teratment wetlands for nine individual farms were constructed in Kaszubian Lake District in summer and autumn 2009. Three configurations of reed beds were chosen. In...
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A Visual Method of Measuring Railway-Track Weed Infestation Level
PublicationThis paper concerns the assessment of railway track surface conditions in relation to the degree of weed infestation. The paper conceptually describes the proposed method using a visual system to analyse weed infestation level. The use of image analysis software for weed detection is also proposed. This new measurement method allows for a mobile assessment of the track’s weed infestation status. Validation of the assessment method...
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Directed electromagnetic pulse dynamics: projecting operators method
PublicationIn this article, we consider a one-dimensional model of electromagnetic pulse propagation in isotropic media, takinginto account a nonlinearity of the third order. We introduce a method for Maxwell's equation transformation on thebasis of a complete set of projecting operators. The operators correspond to wave dispersion branches including thedirection of propagation. As the simplest result of applying the method, we derive a system...
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A handwritten signature verification method employing a tablet
PublicationA signature verification system based on static features and time-domain functions of signals obtained using a tablet has been presented in the paper. The signature verification method, based mainly on dynamic time warping coupled with some signature image features, has been described. The FRR measures reflecting the method's efficiency have been evaluated for verification attempts performed directly after obtaining model signatures...
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A Population-Based Method with Selection of a Search Operator
PublicationThis paper presents a method based on a population in which the parameters of individuals can be processed by operators from various population-based algorithms. The mechanism of selecting operators is based on the introduction of an additional binary parameters vector located in each individual, on the basis of which it is decided which operators are to be used to modify individuals’ parameters. Thus, in the proposed approach,...
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Asynchronous Method of Simultaneous Object Position and Orientation Estimation with Two Transmitters
PublicationThis paper proposes an object location method for all types of applications, including the Internet of Things. The proposed method enables estimations of the position and orientation of an object on a plane or in space, especially during motion, by means of location signals transmitted simultaneously from two transmitters placed on the object at a known distance from each other. A mathematical analysis of the proposed method and...
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A multi-agent method for periodicity detection in distributed events
PublicationMulti-agent systems working in constantly changing environments may be challenged by instantaneous unavailability of their autonomous agents caused e.g. by limited computing resources. A new method of self-organization of distributed service components is proposed, suitable for multi-agent systems. This method relies on particular agents carrying out separate analyzes of their individual processing loads or other specific events....
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Cost-Efficient EM-Driven Size Reduction of Antenna Structures by Multi-Fidelity Simulation Models
PublicationDesign of antenna systems for emerging application areas such as the Internet of Things (IoT), fifth generation wireless communications (5G), or remote sensing, is a challenging endeavor. In addition to meeting stringent performance specifications concerning electrical and field properties, the structure has to maintain small physical dimensions. The latter normally requires searching for trade-off solutions because miniaturization...
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On a flexomagnetic behavior of composite structures
PublicationThe popularity of the studies is getting further on the flexomagnetic (FM) response of nano-electro-magneto machines. In spite of this, there are a few incompatibilities with the available FM model. This study indicates that the accessible FM model is inappropriate when considering the converse magnetization effect that demonstrates the necessity and importance of deriving a new FM relation. Additionally, the literature has neglected...
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Development of the New Polish Method for Capacity Analysis of Motorways and Expressways
PublicationThe paper presents development of the new Polish method for performing capacity analysis of basic segments of dual carriageway roads (motorways and expressways). The method is based on field traffic surveys conducted at 30 motorway and expressway sites (class A and S roads) in Poland. Traffic flows, composition and travel times were observed in 15-min intervals at each site using ANPR filming method. These data were used to calibrate...
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Double Bias of Mistakes: Essence, Consequences, and Measurement Method
PublicationThere is no learning without mistakes. However, there is a clash between‘positive attitudes and beliefs’regarding learning processes and the ‘negative attitudes and beliefs’towardthese being accompanied bymistakes. Thisclash exposesa cognitive bias towardmistakesthat might block personal and organizational learning. This study presents an advanced measurement method to assess thebias of mistakes. The essence of it is the...
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Assessment of the Symmetry and Deformation of a Submarine Hull Using the PCSE Method
PublicationThe paper presents a new dry-dock method for assessing the deformation of submarine hulls using TLS point cloud data and the point cloud spatial expansion method (PCSE). The advantage of the proposed approach is the high-resolution deformation analysis that can be conducted in the case of both the availability and a lack of technical documentation on the submarine hull. The geometry assessment involves two-plane hull symmetry in...
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The Method of Finding the Optimal Spindle Speed When Milling Flexible Details
PublicationThe paper presents a new method of vibration reduction during milling of flexible details. The method consists in selecting the optimal spindle speed, based on the natural frequency of the workpiece. For this purpose, an original method was created, which is based on minimizing the work of cutting forces in the direction of the depth of cutting. The effectiveness of the method has been proved by comparing the RMS values of vibration...
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Application of the LifeRoSE method in funcionality evaluation of road safety equipment
PublicationThe article presents a mathematical model of the life cycle estimation method of road safety equipment. Then the model was adjusted to estimate the life cycle costs of the chosen horizontal road marking. Using the LCC method, the functionality of the horizontal marking was evaluated in terms of efficiency, durability and economic effectiveness. The article also presents the impact of selected factors on the life cycle costs of...
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Sensor Position Estimation Method for IoT Using Mobile Reference Node
PublicationThe paper proposes an innovative method of locating objects for the Internet of Things (IoT). The proposed method allows the position of a fixed measuring sensor (MS) to be estimated using one mobile base station with a known position moving around the MS. The mathematical analysis of the method, and three algorithms — Newton’s (NA), gradient descent (GD) and genetic (GA) — for solving the system of non-linear positional equations...
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A New Method for Automatic Generation of Animated Motion
PublicationA new method for generation of animation with a quality comparable to a natural motion is presented. Proposed algorithm is based on fuzzy description of motion parameters and subjective features. It is assumed that such processing increases naturalness and quality of motion, which is verified by subjective evaluation tests. First, reference motion data are gathered utilizing a motion capture system, then these data are reduced...
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Characteristics of the Hydrophytes Method
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An extension of the method of quasilinearization
PublicationMetodę kwazilinearyzacji zastosowano do problemów początkowych gdy prawą stronę zagadnienia można przedstawić za pomocą nieliniowej funkcji "rozszerzenia", zakładając o niej pewną regularność. Pokazano, że odpowiednio skonstruowane ciągi monotoniczne są zbieżne kwadratowo do rozwiązania problemu. Praca uogólnia odpowiednie wyniki, gdy prawa strona jest sumą funkcji wklęsłych i wypukłych ze względu na ostatni argument.
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Evolutionary Sets of Safe Ship Trajectories: development of the method
PublicationThe Evolutionary Sets of Safe Ship Trajectories is a method solving ship encounter situations. The method combines evolutionary approach to planning ship trajectory with some of the assumption of game theory. For given positions and motion parameters the method finds a near optimal set of safe trajectories of all ships involved in an encounter. The version presented here is an updated one and its authors have tested extensively...
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A standard analytical method as the common good and pollution abatement measure
PublicationA standard method can be considered as a common-good “resource,” and the solution to “the commons” problems usually lies in societal self-organization. The multi-criteria decision analysis (MCDA) was applied to model complex phenomena, such as the standard selection for imidacloprid determination. In this process, the standard was self-selected by the analytical chemistry society. The results show that analytical chemistry is a...
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Application of the Optimum Dataset Method in Archeological Studies on Barrows
PublicationLight Detection and Ranging (LiDAR) became one of the technologies used in archaeological research. It allows for relatively easy detection of archaeological sites that have their own field form, e.g.: barrows, fortresses, tracts, ancient fields [1]. As a result of the scanning, the so-called point cloud is obtained, often consisting of millions of points. Such large measurement datasets are very time-consuming and labor-intensive...
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Variational Method of Finding Streamlines in Ring Cascades for Creeping Flows
PublicationThis paper presents a new, analytical method of finding streamlinesfor creeping flows inside a ring cascade which is composed of an infinite number of infinitely thin blades. An analytical solution has been obtained through minimisation of a dissipation functional by means of variational calculus method. The necessary condition for optimum of a functional gives the Stokes equation if some additional assumptions are introduced....
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Trust Management Method for Wireless Sensor Networks
PublicationA Wireless Sensor Network (WSN) is a network of spatially distributed autonomous sensors to monitor physical or environmental conditions, such as temperature, sound, pressure, etc. and to cooperatively pass their data to the main location. The first wireless network that bore any real resemblance to a modern WSN is the Sound Surveillance System (SOSUS), developed by the United States Military in the 1950s to detect and track Soviet...
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Application of elasto-viscoplastic Bodner-Partom constitutive equations in finite element analysis
PublicationW artykule omówiono szczegółowo zastosowanie sprężysto-lepkoplastycznego prawa Bodnera-Partoma w analizie MES. Przedstawiono opis podstawowych równań modelu wraz z kodem procedury UVSCPL wykorzystanej w analizie numerycznej MES.
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Rewitalizacja terenów poportowych jako element współczesnych strategii przekształceń miast portowych
PublicationArtykuł zawiera generalny opis współczesnego procesu rewitalizacji terenów poportowych jako elementu strategii przekształceń miast portowych. Zaprezentowano w nim porównanie szeregu przykładów procesów realizowanych w miastach europejskich i północnoamerykańskich
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Rozwój technik ekstrakcji w których wykorzystuje się wirujący element sorpcyjny
PublicationW artykule przedstawiono technikę ekstrakcji SBSE i prace rozwojowe nad jej udoskonaleniem, przyczyniające się do miniaturyzacji oraz pozwalające na redukcję ilości stosowanych rozpouszczalników
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Zarządzanie ryzykiem jako niezbędny element procesu zarządzania wartością w przedsiębiorstwie
PublicationZarządzanie przedsiębiorstwem nabiera wielowymiarowego zna-czenia w warunkach dynamicznie zmieniającego się otoczenia. Strategie realizowane przez przedsiębiorstwa uwzględniają nie tylko negatywny, ale i pozytywny wpływ ryzyka na wartość przedsiębiorstwa oraz jego potencjał rozwojowy. Przedsiębiorcza orientacja podmiotów wyraża się w podejmowaniu ryzyka na drodze do budowania swojej pozycji konkurencyjnej, a podejście do zarządzania...
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Weryfikacja efektów kształcenia jako element Wewnętrznego Systemu Zapewnienia Jakości Kształcenia
PublicationPojęcie weryfikacji efektów kształcenia jest pojęciem nowym, wprowadzonym w ostatniej nowelizacji ustawy. Pojęcie to jest ściśle związane z osiągniętymi przez studenta efektami kształcenia, które precyzyjnie definiują jego kompetencje. Efekty kształcenia określane są przez uczelnię jako specyficzne dla danego kierunku studiów i pogrupowane są w kategorie: wiedza, umiejętności i kompetencje społeczne.
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Zarządzanie ryzykiem jako element wspomagania działań logistycznych w przedsiębiorstwie budowlanym
PublicationW artykule wskazuje się na możliwość wykorzystania systemu zarządzania ryzykiem w przedsiębiorstwie budowlanym jako elementu wspomagania realizacji działań logistycznych prowadzonych przez uczestników procesu w toku wykonywania inwestycji budowlanej.
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Proces przekształceń własnościowych jako integralny element transformacji systemowej krajów postsocjalistycznych
PublicationPodstawowym celem transformacji systemu ekonomicznego jest zmiana struktury gospodarki, która sprowadza się do jej denacjonalizacji, czyli alokacji majątku przedsiębiorstw państwowych w prywatnych podmiotach gospodarczych. Prywatyzowanie gospodarki w krajach posocjalistycznych jest więc głównym krokiem w kierunku systemu politycznego, istniejącego od ponad stu lat z wielkim powodzeniem w zdecydowanej większości tych obszarów świata,...
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Stability of CII is a key element in the cold stress response of bacteriophage lambda infection
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Experimental Study and Finite Element Modeling of Reinforced Concrete Column Having an Opening
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The spectral finite element model for analysis of flexural–shear coupled wave propagation
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Recent achievements in element analysis of bee honeys by atomic and mass spectrometry methods
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Scaling diminution by heterogeneous crystallization in a filtration element integrated with membrane distillation module
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Transport corridors as an important element of the sustainable development policy with particular emphasis on railways
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Noise spectral density computation based on finite element model of piezoceramic sensor
PublicationThe high sensitivity with wide bandwidth is required for sensor applications in non-destructive testing (NDT). The sensitivity of piezoceramic sensors demands to minimize their noise especially thermal noise, polarisation noise and low frequency 1/f noise,which are the main sources of voltage or current fluctuation in this sort of sensors. For simplicity, only the piezoceramic part of sensor was under study. the theoretical and...
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Identyfikacja własności dynamicznych cięgien jako element diagnostyki wybranych konstrukcji mostowych
PublicationW artykule opisano doświadczenia autorów związane z identyfikacją siły w cięgnach mostów. Główna uwaga poświęcona została sprężeniu zewnętrznemu w mostach betonowych. Rozpatrzono wpływ błędów pomiarowych występujących w trakcie badań identyfikujących siłę na podstawie parametrów modalnych. Zwrócono wpływ trudności związanych z określeniem długości cięgna, jego masą i warunkami brzegowymi. Opisany przypadek uszkodzonego kabla sprężającego...
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Woda jako element przyrodniczy w przestrzeni zamieszkiwania. Ideowe formy architektoniczne
PublicationMożna obecnie zaobserwować nasilające się zjawisko pozamiejskich migracji. Sprzyja im dogodność warunków zamieszkiwania poza miastem. Pojezierze Kaszubskie to obszar, gdzie powstaje wiele pozamiejskich, czasowo zamieszkiwanych domów. Często lokowane są one pobliżu jezior i rzek. Wydaje się, że woda stanowi szczególny walor tych miejsc. Nawiązywane poprzez nią relacje i poczucie współuczestnictwa skłoniły do poszukiwania szczególnych...
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Estetyka domu jak element warunkujący poczucie przynależności w procesie zamieszkiwania
PublicationDom jest formą schronienia, która stanowi przedmiot w złożonym procesie zamieszkiwania. Jednym z aspektów decydujących o doświadczaniu poczucia utożsamiania w tym procesie jest estetyka tego domu. Dbałość o jej spójność z oczekiwaniami przyszłych mieszkańców i wpasowanie w zastane otoczenie wydają się oczywistym zadaniem architekta. Jednak w przypadku istniejących osiedli mieszkaniowych wielorodzinnych, zwanych potocznie blokowiskami,...
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Step on It Bringing Fullwave Finite-Element Microwave Filter Design up to Speed
PublicationThere are many steps in the design of a microwave filter: mathematically describing the filter characteristics, representing the circuit as a network of lumped elements or as a coupling matrix, implementing the distributed elements, finding the initial dimensions of the physical structure, and carrying out numerical tuning using electromagnetic (EM) simulators. The whole process is painstaking and time-consuming, and it requires...
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Logistyka twarda HL jako element przewagi konkurencyjnej w sferze dystrybucji
PublicationLogistyka została zdefiniowana jako dwuskładnikowa: miękka SL (Soft Logist) oraz twarda HL (Hard Logist). Przedstawiono zakres kompetencyjny oraz podano przykłady.
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Comparison of modal and finite-element methods in the vibrational analysis of marine propulsion systems
PublicationW okrętowych układach napędowych występują dwa typy części składowych. Pierwszym z nich są odcinki wałów, które należą do elementów o ciągłym rozkładzie własności masowych, sprężystych i tłumiących oraz elementy o parametrach skupionych, do których można zaliczyć śrubę napędową, tarcze sprzęgieł i inne. W pracy porównano dwie metody modelowania takich układów. Pierwsza z nich związana jest z tworzeniem modeli przybliżonych w oparciu...
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Magdalena Ewa Apollo dr inż.
People2017 - PhD in Civil Engineering, thesis: Risk management in construction investments related to urban regeneration projects, Gdansk University of Technology IX 2012–VI 2013 - Postgraduate Studies at Gdynia Maritime University: Research Project Management (IPMA D Certificate) 2010 – MSc in Management and Marketing, Gdansk University of Technology 2007 – MSc in Civil Engineering, Gdansk University of Technology 2007-2010 - structural...