Search results for: dynamika kwantowa

• Structure of the interlayer between Au thin film and Si-substrate: Molecular Dynamics simulations

  Publication

  • W. Pleczysty
  • I. Shtablavyi
  • S. Winczewski
  • K. Rybacki
  • S. Mudry
  • J. Rybicki

  - Materials Research Express - Year 2020

  Interaction between 2, 3, 5 and 7 atomic layers of gold and a (111) silicon surface was investigated with the molecular dynamics simulation method. The simulation of the diffusion interaction between gold and silicon in the temperature range 425-925 K has been carried out. The peculiarities of the concentration changes of the interacting components and the atomic density at the boundary...

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• Study on population dynamics for triple-linked food chain using a simulation-based approach

  Publication

  • K. Balabanov
  • T. Cejrowski
  • D. Logofătu
  • C. Bădică

  - Evolving Systems - Year 2019

  The procedures based on simulation have become a feasible testing method that does not require investing valuable resources to create a concrete prototype, especially with the increasing computational power of computers. Thus, design changes can be adopted and design errors can be fixed before it is too late. Simulation turns to be a cheap, safe and often more acceptable from an ethical perspective. In our work we summarize the...

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• Design and computational fluid dynamics analysis of the last stage of innovative gas-steam turbine

  Publication

  • S. Głuch
  • P. Ziółkowski
  • Ł. Witanowski
  • J. Badur

  - Archives of Thermodynamics - Year 2021

  Research regarding blade design and analysis of flow has been attracting interest for over a century. Meanwhile new concepts and design approaches were created and improved. Advancements in information technologies allowed to introduce computational fluid dynamics and computational flow mechanics. Currently a combination of mentioned methods is used for the design of turbine blades. These methods enabled us to improve flow efficiency...

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• The Effect of Openings’ Size and Location on Selected Dynamical Properties of Typical Wood Frame Walls

  Publication

  • M. Szczepański
  • A. Manguri
  • N. Saeed
  • D. Chuchała

  - Polymers - Year 2022

  The wooden frame constructions are now popular in many developed countries of the world. Many of these locations where such buildings are constructed are exposed to seismic and other shocks which are generated by human activities. This paper discusses the effect of the size and location of openings in the wooden frame walls under dynamic loadings. Natural frequencies of such frames with and without openings have been determined....

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• Bistability in a One-Dimensional Model of a Two-Predators-One-Prey Population Dynamics System

  Publication

  • S. Kryzhevich
  • V. Avrutin
  • G. Sӧderbacka

  - Lobachevskii Journal of Mathematics - Year 2021

  In 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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• A spline-based FE approach to modelling of high frequency dynamics of 1-D structures

  Publication

  • A. Żak
  • W. Waszkowiak

  - COMPUTERS & MATHEMATICS WITH APPLICATIONS - Year 2021

  In this paper a computational methodology leading to the development of a new class of FEs, based on the application of continuous and smooth approximation polynomials, being splines, has been presented. Application of the splines as appropriately defined piecewise elemental shape functions led the authors to the formulation of a new approach for FEM, named as spFEM, where contrary to the well-known NURBS approach, the boundaries...

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• An automatic selection of optimal recurrent neural network architecture for processes dynamics modelling purposes

  Publication

  • K. Laddach
  • R. Łangowski
  • T. A. Rutkowski
  • B. Puchalski

  - APPLIED SOFT COMPUTING - Year 2022

  A problem related to the development of algorithms designed to find the structure of artificial neural network used for behavioural (black-box) modelling of selected dynamic processes has been addressed in this paper. The research has included four original proposals of algorithms dedicated to neural network architecture search. Algorithms have been based on well-known optimisation techniques such as evolutionary algorithms and...

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• An adaptive-noise Augmented Kalman Filter approach for input-state estimation in structural dynamics

  Publication

  • S. Vettori
  • E. Di Lorenzo
  • B. Peeters
  • M. Łuczak
  • E. Chatzi

  - MECHANICAL SYSTEMS AND SIGNAL PROCESSING - Year 2023

  The establishment of a Digital Twin of an operating engineered system can increase the potency of Structural Health Monitoring (SHM) tools, which are then bestowed with enhanced predictive capabilities. This is particularly relevant for wind energy infrastructures, where the definition of remaining useful life is a main driver for assessing the efficacy of these systems. In order to ensure a proper representation of the physical...

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• Kontrasty, metamorfozy, styl - czyli rozważania o dynamice przemian architektury XX wieku.

  Publication

  • K. Pokrzywnicka

  - Year 2003

  Badanie ciągłych przemian w sposobie kreowania architektury zarówno w teorii jak i praktyce budowania na przestrzeni ostatnich stu lat doprowadziło do wyodrębnienia pewnych matematycznie ujętych zależności.

• Fem and time stepping procedures in non-linear dynamics of flexible branched shell structures.

  Publication

  • J. Chróścielewski
  • I. Lubowiecka
  • W. Pietraszkiewicz

  - Year 2004

  W pracy dyskutowano problemy całkowania równań ruchu, sformułowanych w ramach nieliniowej sześcioparametrowej teorii powłok. Główne myśli dotyczą zbieżności rozwiązań uzyskanych w procesie aproksymacji przestrzennej i czasowej oraz analizy stabilności rozwiązań MES.

• Molecular aspects of the interaction between amphotericin B and a phospholipid bilayer: molecular dynamics studies.

  Publication

  • K. Sternal
  • J. Czub
  • M. Bagiński

  - Year 2004

  Amfoterycyna B jest antybiotykiem z grupy polienów makrolidowych. Stosowany jest on w leczeniu układowych infekcji grzybowych. Wiadomo że związek ten oddziałuje ze składnikami błon lipidowych i tworzy kanały. W przedstawianej pracy prezentowane są wyniki symulacji przeprowadzonej dynamiką molekularną układu składającego się z 200 cząsteczek lipidów DMPC i jednej cząsteczki amfoterycyny ułożonej na powierzchni błony. Z przeprowadzonej...

• Multimodal analysis of traction forces and the temperature dynamics of living cells with a diamond-embedded substrate

  Publication

  • T. Kołodziej
  • M. Mrózek
  • S. Sengottuvel
  • M. Głowacki
  • M. Ficek
  • W. Gawlik
  • Z. Rajfur
  • A. M. Wojciechowski

  - Biomedical Optics Express - Year 2024

  Cells and tissues are constantly exposed to chemical and physical signals that regulate physiological and pathological processes. This study explores the integration of two biophysical methods: traction force microscopy (TFM) and optically detected magnetic resonance (ODMR) to concurrently assess cellular traction forces and the local relative temperature. We present a novel elastic substrate with embedded nitrogen-vacancy microdiamonds...

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• Unusual dynamics and nonlinear thermal self-focusing of initially focused magnetoacoustic beams in a plasma

  Publication

  • A. Perelomova

  - CONTRIBUTIONS TO PLASMA PHYSICS - Year 2024

  Unusual thermal self-focusing of two-dimensional beams in plasma which axis is parallel to the equilibrium straight magnetic field is considered. The equi- librium parameters of plasma determine scenario of a beam divergence (usual or unusual) which is stronger as compared with a flow without magnetic field. Nonlinear thermal self-action of a magnetosonic beam behaves differently in the ordinary and unusual cases. Damping of wave...

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• Experimental and numerical analysis of the pyrolysis dynamics of a single wood particle: presentation of the radiographic technique

  Publication

  • P. Kazimierski
  • K. Januszewicz
  • P. Hercel
  • D. Kardas

  - WOOD SCIENCE AND TECHNOLOGY - Year 2023

  Pyrolysis is an oxygen-free process for the thermal decomposition of raw materials. The heat conduction and flow of pyrolysis products (i.e., the gas fraction and liquid vapour generated during pyrolysis) influence the process and products. In this work, the influence of the orientation of wooden particle fibres with respect to the direction of the heat source on the dynamics of the process was investigated, where there were two...

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• Dynamic Languages Symposium

  Conferences

• Dynamic Graph Workshop

  Conferences

• CLIMATE DYNAMICS

  Journals

  ISSN: 0930-7575 , eISSN: 1432-0894

• Toward Mechanosynthesis of Diamondoid Structures: VI. Quantum-Chemical Molecular Dynamics Comparison of Conditions for the STM Tip Driven Mechanosynthesis on Hydrogenated Si(111), Si(110) and Si(100) Surfaces.

  Publication

  • A. Herman

  - Year 2010

  możliwość prototypowania przejściowych generacji nano-urządzeń otrzymanych drogą pozycjonowanej mechanosyntezy za pomocą stm wyposażonego w ostrze typu swcnt są analizowane metodą kwantowo-chemicznej dynamiki molekularnej. proponowana strategia syntezy polega na insercji atomów si oraz cząsteczek sih2 we wiązania si-h na uwodornionej powierzchni si(111), si(110) oraz si(100) kryształu krzemu. rezultaty modelowania sugerują, że...

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• Fuzzy rule-based dynamic gesture recognition employing camera & multimedia projector

  Publication

  • M. Lech
  • B. Kostek

  - Year 2010

  In the paper the system based on camera and multimedia projector enabling a user to control computer applications by dynamic hand gestures is presented. The main objective is to present the gesture recognition methodology which bases on representing hand movement trajectory by motion vectors analyzed using fuzzy rule-based inference. The approach was engineered in the system developed with J2SE and C++ / OpenCV technology. OpenCV...

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• Static and dynamic approach of social roles identification using PISNA and subgraphs matching

  Publication

  • R. Brendel
  • H. Krawczyk

  - Year 2010

  Identyfikacja ról w sieci społecznej jest jednym z podstawowych zagadnień analiza takich sieci. W artykule przedstawiamy nowe podejście do tego zagadnienia. Pokazujemy w jaki sposób można dokonać identyfikacji ról poprzez tworzenie specjalnych struktur grafowych tzw. grafów wzorcowych. Przy definiowaniu tychże grafów wspieramy się metodą PISNA. Proponujemy statyczne i dynamiczne podejście do identyfikacji ról. Pokazujemy, w jaki...

• Quantitative active dynamic thermal ir-imaging and thermal tomography in medical diagnostics

  Publication

  • A. Z. Nowakowski

  - Year 2006

  Praca dotyczy nowych technik obrazowania w diagnostyce medycznej, wykorzystując przetwarzanie obrazów termicznych rejestrowanych w podczerwieni. Opisano właściwości termiczne tkanek biologicznych, omówiono medele termiczne i zdefiniowano zastępcze parametry syntetyczne, metody pomiarów i stosowane urządzenia. Omówiono procedury akwizycji danych i ich przetwarzania. Wprowadzono pojęcie tomografii termicznej. Opisano przeprowadzone...

• Analysis od dynamic loads on lightweight footbridge caused by lorry passing underneath

  Publication

  • P. Żółtowski
  • J. Piechna
  • H. Zobel
  • K. Żółtowski

  - Bulletin of the Polish Academy of Sciences-Technical Sciences - Year 2006

  W artykule przedstawiono analizę drgań lekkiej kładki dla pieszych wywołanych przejazdem ciężarówki z dużą prędkością pod spodem konstrukcji.

• Simulation Results of Dynamic Capacity Reallocation in Hierarchical Cell Structure of UMTS Network

  Publication

  • M. Gajewska
  • S. Gajewski

  - POLISH JOURNAL OF ENVIRONMENTAL STUDIES - Year 2007

  In the paper simulation results of dynamic capacity reallocation between different layers of hierarchical cell structure of UMTS network has been described. This approach for load management seems to be useful for improving the resource utilization perfmorance.

• Web-based GIS technologies dedicated for presenting semi-dynamic geospatial data

  Publication

  • M. Kulawiak
  • M. Łuba
  • A. Chybicki

  - Year 2008

  Sieciowe technologie prezentacji danych przestrzennych przeżywają aktualnie rozkwit spowodowany między innymi spadającymi cenami sprzętu komputerowego. Wynikający z tego wzrost wydajności domowych i biurowych stacji roboczych pozwala na praktyczne zastosowanie czasochłonnych algorytmów wizualizacji i przetwarzania skomplikowanych danych rastrowych i wektorowych. Niniejszy artykuł omawia wybrane technologie sieciowej prezentacji...

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• Quantitative active dynamic thermal Ir-Imaging and thermal tomography in medical diagnostics

  Publication

  • A. Z. Nowakowski

  - Year 2008

• Fatigue resistance investigation of the mb46 plain bearings under conditions of dynamic loadings

  Publication

  • J. Sikora
  • W. Majewski

  - TRIBOLOGIA - Year 2008

  Odporność materiału łożyskowego MB46 na pęknięcia zmęczeniowe badano na stanowisku SMOK, w którym generowane jest zmienne jednokierunkowe obciążenie badanego łożyska. Materiał łożyskowy MB46 składa sie z warstwy brązu CuPb22Sn 3 spiekanego na taśmie stalowej, stanowiącej podłoże. Na warstwę brązu nałożona jest galwanicznie cienka warstwa stopu SnCu6 stanowiąca powłokę. Każde z badanych łożysk poddawane było 20-godzinnemu testowi...

• Ship course control system taking into account the steering gear dynamic properties

  Publication

  • A. Witkowska
  • R. Śmierzchalski

  - Zeszyty Naukowe Akademii Morskiej w Szczecinie - Year 2012

  W artykule zostały przedstawione różne konfiguracje regulatorów nieliniowych do sterowania kursem statku. Zaprojektowane regulatory oparto na metodzie backstepping, regulatorze PD oraz sterowaniu ślizgowym. Algorytmy uwzględniają na etapie projektowania liniowe własności dynamiczne urządzenia wykonawczo - sterującego maszyny sterowej. Dokonano analizy porównawczej jakości pracy rozpatrywanych struktur sterowania podczas badań symulacyjnych...

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• Dynamic variables limitation for backstepping control of induction machine and voltage source converter

  Publication

  • M. Morawiec

  - Archives of Electrical Engineering - Year 2012

  Dynamic variables limitation for backstepping control of induction machine and voltage source converter The paper presents the method of control of an induction squirrel-cage machine supplied by a voltage source converter. The presented idea is based on an innovative method of the voltage source converter control, consisting in direct joining of the motor control system with the voltage source rectifier control system. The combined...

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• Quantitative Active Dynamic Thermal IR-Imaging and Thermal Tomography in Medical Diagnostics

  Publication

  • A. Z. Nowakowski

  - Year 2012

  .

• Investigation of buckling resistance of columns using non-linear static and dynamic analysis

  Publication

  • Ł. Żmuda-Trzebiatowski
  • P. Iwicki

  - Year 2014

  The aim of this paper is to investigate the stability process in an axially compressed column using a static and dynamic finite element analysis by taking both the geometric and material non-linearity into account. The perfect column and column with geometric imperfections were analysed. The linear buckling analyses were used to obtain the lowest buckling load and shapes of buckled forms that were taken into account as initial...

• Identification of dynamic parameters in the context of diagnostics of steel tank with different level of liquid.

  Publication

  • M. Rucka
  • M. Zielińska

  - Diagnostyka - Year 2015

  The paper presents an experimental study to identify the dynamic parameters of a water-filled tank model. The experimental modal analysis approach involving the excitation at one point of the structure and acquisition of vibra tions at selected points distri buted over the tank surface allowed to determine the resonance frequencies, mode shapes and damping ratios. The main aim of the research was to examine the influence of...

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• DYNAMIC ANALYSIS OF THE IMPACT OF VIBRATION ON HISTORICAL BUILDINGS - AN OWN PROJECT OF EXTERNAL STAIRCASE

  Publication

  • M. Zielińska
  • M. Wojtkiewicz

  - Year 2015

  This article presents numerical simulations that concern modeling of interaction of the external staircase’s construction with the observation deck on historic water tower located at Gdansk University of Technology. The interaction occurring according to various methods of the staircase's construction support on the wall of the historic tower was compared. The external staircase that allows for entering onto the monument was subjected...

• Oil removal from polluted soil by washing with surfactants solutions in dynamic conditions

  Publication

  • E. Hallmann
  • M. Bardachowska

  - Year 2012

  For washing of the oil from polluted soil surfactants solutions were applied. In a research a nonionic synthetic surfactant - polyoxyethylene ether of synthetic fatty alcohol (Rokanol NL6), rhamnolipid biosurfactant JBR 425 (Jeneil Biosurfactant Co. LLC) and their mixtures were used. Results of oil removal from peat soil and sand with mixtures of surfactants solutions at concentration 0,5 g/dm...

• Development Of Dynamic Method For Evaluation Of Corrosion Rate On The Example Of Organic Corrosion İnhibitor

  Publication

  • A. Jażdżewska
  • K. Darowicki
  • J. Orlikowski

  - Year 2016

  Measurements of the corrosion rate belong to the most important aspects of materials science. In order to reduce material loss corrosion inhibitors are used. However selection of proper inhibitor should be based on evaluation of its mechanism and effective concentrations. Mechanism of inhibition usually has dynamic character so physicochemical parameters are changing in time. Most of actually used methods...

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• Dynamic GNSS Mission Planning Using DTM for Precise Navigation of Autonomous Vehicles

  Publication

  • A. Nowak

  - JOURNAL OF NAVIGATION - Year 2017

  Nowadays, the most widely used method for estimating location of autonomous vehicles in real time is the use of Global Navigation Satellite Systems (GNSS). However, positioning in urban environments using GNSS is hampered by poor satellite geometry due to signal obstruction created by both man-made and natural features of the urban environment. The presence of obstacles is the reason for the decreased number of observed satellites...

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• Modified dynamic time warping method applied to handwritten signature authenticity verification

  Publication

  • M. Lech
  • A. Czyżewski

  - Elektronika : konstrukcje, technologie, zastosowania - Year 2017

  A 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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• Programmable dynamically changing RC model for evaluation of Dynamic EIS methods and instrumentation

  Publication

  • G. Lentka
  • P. Ślepski
  • D. Palmowski

  - Przegląd Elektrotechniczny - Year 2018

  The paper concerns the RC equivalent circuit of electrochemical cell with the impedance changed during the experiment. The model was constructed using the digital potentiometers controlled by the microcontroller. This solution allows to control the model impedance by the software means. By creating adequate changes of the impedance spectrum as a time function, the different impedance measurement method can be tested to find out...

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• Determination of the optimal curvature of the turnout diverging track for HSR using dynamic analysis

  Publication

  • W. Koc
  • K. Palikowska

  - Przegląd Komunikacyjny - Year 2017

  The paper presents an analytical method of identifying the curvature of the turnout diverging track consisting of sections of varying curvature. Such turnout is mainly applied on High Speed Railway. Both linear and nonlinear (polynomial) curvatures of the turnout diverging track are considered in the paper. Obtained solutions enable to assume curvature values at the beginning and end point of the geometrical layout of the turnout.The...

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• Do global brands contribute to the economy of their country of origin? A dynamic spatial approach

  Publication

  • W. Kucharska
  • K. Flisikowski
  • I. Confente

  - Journal of Product & Brand Management - Year 2018

  Purpose - Brand positioning based on the brand’s country of origin is at the centre of attention in international marketing. It is evident that global brands constitute critical intangible assets for businesses and places. However, it is not clear how they contribute to national economies. This paper aims to discuss the significance of brands as contributing to the value of their companies but also helping to leverage national...

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• Dynamic analysis of temporary steel grandstand equipped with different types of bracing system

  Publication

  • N. Lasowicz
  • T. Falborski

  - MATEC Web of Conferences - Year 2018

  In the paper, behaviour of a temporary steel grandstand equipped with two different types of bracing system has been analysed through the numerical study. A typical solution concerning application of a diagonal tubular members has been compared with elements proposed by authors and called polymer dampers. A polymer element consists of two L-shape steel members bonded with polymer mass. The aim of the paper is to verify the effectiveness...

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• Quantitative Active Dynamic Thermal IR-Imaging and Thermal Tomography in Medical Diagnostic

  Publication

  • A. Z. Nowakowski

  - Year 2013

  Principles of Active dynamic thermal (ADT) IR-imaging and Thermal Tomography are described in details. Basic medical applications of this new modality are also discussed.

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• Voiceless Stop Consonant Modelling and Synthesis Framework Based on MISO Dynamic System

  Publication

  • G. Korvel
  • B. Kostek

  - Archives of Acoustics - Year 2017

  A voiceless stop consonant phoneme modelling and synthesis framework based on a phoneme modelling in low-frequency range and high-frequency range separately is proposed. The phoneme signal is decomposed into the sums of simpler basic components and described as the output of a linear multiple-input and single-output (MISO) system. The impulse response of each channel is a third order quasi-polynomial. Using this framework, the...

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• Dynamic Signal Strength Mapping and Analysis by Means of Mobile Geographic Information System

  Publication

  • M. Kulawiak
  • W. Wycinka

  - Metrology and Measurement Systems - Year 2017

  Bluetooth beacons are becoming increasingly popular for various applications such as marketing or indoor navigation. However, designing a proper beacon installation requires knowledge of the possible sources of interference in the target environment. While theoretically beacon signal strength should decay linearly with log distance, on-site measurements usually reveal that noise from objects such as Wi-Fi networks operating in...

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• Performance evaluation of unified memory and dynamic parallelism for selected parallel CUDA applications

  Publication

  • Ł. Jarząbek
  • P. Czarnul

  - JOURNAL OF SUPERCOMPUTING - Year 2017

  The aim of this paper is to evaluate performance of new CUDA mechanisms—unified memory and dynamic parallelism for real parallel applications compared to standard CUDA API versions. In order to gain insight into performance of these mechanisms, we decided to implement three applications with control and data flow typical of SPMD, geometric SPMD and divide-and-conquer schemes, which were then used for tests and experiments. Specifically,...

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• Determination of model's fixing boundary conditions for the numerical simulations of the dynamic experimental tests

  Publication

  • Ł. Pyrzowski
  • K. Woznica
  • P. Kłosowski
  • O. Pennetier

  - Year 2011

  Zaprezentowano badania eksperymentalne oraz ich symulacje numeryczne przeprowadzone na płytach obciążanych impulsowo (wybuch mieszanki gazowej). Głównym obszarem zainteresowania pracy jest wyznaczenie warunków brzegowych w stosowanym modelu.

• The new footbridge in city of Cracow dynamic design and final verification in test loading

  Publication

  • K. Żółtowski
  • A. Kozakiewicz

  - Year 2011

  Artykuł przedstawia rozwój projektu kładki od formy architektonicznej do ostatecznego kształtu konstrukcji.

• Experimental determination of dynamic properties of cylindrical steel tank model filled with liquid

  Publication

  • D. Burkacki
  • R. Jankowski
  • T. Falborski

  - Technology and Art - Year 2012

  In technical branches, such as chemical or petroleum industries, cylindrical steel tanks are essential structures used for storage of liquid products. Any failure might have disastrous consequences, therefore their safety and reliability is essential. The aim of the present paper is to show the results of the experimental study which has been conducted on a scaled model of a real tank used in Poland. The investigation was carried...

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• Dynamic Analysis of an Enhanced Multi-Frequency Inertial Exciter for Industrial Vibrating Machines

  Publication

  • V. Gursky
  • P. Krot
  • V. Korendiy
  • R. Zimroz

  - Machines - Year 2022

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• From the Dynamic Lattice Liquid Algorithm to the Dedicated Parallel Computer – mDLL Machine

  Publication

  • J. Jung
  • R. Kiełbik
  • K. Rudnicki
  • K. Hałagan
  • P. Polanowski
  • A. Sikorski

  - Computational Methods in Science and Technology - Year 2018

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• Static and dynamic superheated water extraction of essential oil components fromThymus vulgarisL.

  Publication

  • A. Dawidowicz
  • E. Rado
  • D. WIANOWSKA

  - Journal of Separation Science - Year 2009

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