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Search results for: COURANT NUMBER

Search results for: COURANT NUMBER

  • Share of gross value added generated by enterprises in GDP

    Open Research Data
    open access

    After Poland joined the group of countries associated in the European Union and through participation in numerous economic and political organizations (including the World Trade Organization, OECD), as well as the commencement of trade exchange with virtually all countries of the world, Polish entrepreneurs and managers struggle with completely problems...

  • Artificial neural network based fatigue life assessment of friction stir welding AA2024-T351 aluminum alloy and multi-objective optimization of welding parameters

    Publication
    • R. Masoudi Nejad
    • N. Sina
    • D. Ghahremani Moghadam
    • R. Branco
    • W. Macek
    • F. Berto

    - INTERNATIONAL JOURNAL OF FATIGUE - Year 2022

    In this paper, the fracture behavior and fatigue crack growth rate of the 2024-T351 aluminum alloy has been investigated. At first, the 2024-T351 aluminum alloys have been welded using friction stir welding procedure and the fracture toughness and fatigue crack growth rate of the CT specimens have been studied experimentally based on ASTM standards. After that, in order to predict fatigue crack growth rate and fracture toughness,...

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  • Study of Non-Newtonian biomagnetic blood flow in a stenosed bifurcated artery having elastic walls

    Publication

    - Scientific Reports - Year 2021

    Fluid structure interaction (FSI) gained attention of researchers and scientist due to its applications in science felds like biomedical engineering, mechanical engineering etc. One of the major application in FSI is to study elastic wall behavior of stenotic arteries. In this paper we discussed an incompressible Non-Newtonian blood fow analysis in an elastic bifurcated artery. A magnetic feld is applied along x direction. For...

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  • Independent Domination Subdivision in Graphs

    Publication

    - GRAPHS AND COMBINATORICS - Year 2021

    A set $S$ of vertices in a graph $G$ is a dominating set if every vertex not in $S$ is adjacent to a vertex in~$S$. If, in addition, $S$ is an independent set, then $S$ is an independent dominating set. The independent domination number $i(G)$ of $G$ is the minimum cardinality of an independent dominating set in $G$. The independent domination subdivision number $\sdi(G)$ is the minimum number of edges that must be subdivided (each...

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  • Janusz Cieśliński prof. dr hab. inż.

    He was born on April 15, 1954 in Slupsk. He graduated from the Faculty of Mechanical Engineering at Gdańsk University of Technology (1978). In 1986 he received the title of Doctor, in 1997 he obtained the title of Ph.D. with habilitation, and in 2006 he received the title of Professor. He worked as head of department and vice-dean for Education at the Faculty of Mechanical Engineering for two terms (2002-2008). His research interests...

  • Total Domination Versus Domination in Cubic Graphs

    Publication

    A dominating set in a graph G is a set S of vertices of G such that every vertex not in S has a neighbor in S. Further, if every vertex of G has a neighbor in S, then S is a total dominating set of G. The domination number,γ(G), and total domination number, γ_t(G), are the minimum cardinalities of a dominating set and total dominating set, respectively, in G. The upper domination number, \Gamma(G), and the upper total domination...

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  • Ireneusz Czarnowski Prof.

    People

    IRENEUSZ CZARNOWSKI is a graduate of the Faculty of Electrical Engineering at Gdynia Maritime University. He gained a doctoral degree in the field of computer science at Poznan University of Technology and a postdoctoral degree in the field of computer science at Wroclaw University of Science and Technology. Since 1998 is associated with Gdynia Maritime University, currently is a professor of computer science in the Department...

  • Detecting Apples in the Wild: Potential for Harvest Quantity Estimation

    Publication
    • A. Janowski
    • R. Kaźmierczak
    • C. Kowalczyk
    • J. Szulwic

    - Sustainability - Year 2021

    Knowing the exact number of fruits and trees helps farmers to make better decisions in their orchard production management. The current practice of crop estimation practice often involves manual counting of fruits (before harvesting), which is an extremely time-consuming and costly process. Additionally, this is not practicable for large orchards. Thanks to the changes that have taken place in recent years in the field of image...

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  • Networkig activities of general judiciary - from theory to practice

    Publication

    - e-mentor - Year 2018

    Over the last three decades, networks - as a field of research - have acquired a significant place among management sciences. Unfortunately, in the judiciary they have become a subject of more careful analyses only recently, which resulted in a large discrepancy of knowledge - both in theory and in its practical adaptation for the needs of the courts. In order to fill this cognitive gap, an attempt was made to identify levels of...

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  • Paweł Możejko dr hab.

  • Jarosław Chojnacki prof. dr hab. inż.

    Born in 1961 in Bydgoszcz, professional education started at the Chemical Technical Highschool  (I. Łukasiewicz). He graduated from the Faculty of Chemistry at the Gdańsk University of Technology in 1986, defending the work on ion-selective electrodes. Subsequent studies were related to organic and siliconorganic synthesis and, from 2002 year on, to crystallography. The doctoral thesis concerned the Silanotiolanes of coinage metals...

  • Simulation of the response of base-isolated buildings under earthquake excitations considering soil flexibility

    Publication

    - Earthquake Engineering and Engineering Vibration - Year 2012

    The accurate analysis of the seismic response of isolated structures requires the incorporation of the flexibility of supporting soil. However, it is often customary to idealize the soil as rigid during the analysis of such structures. In the present paper, seismic response time history analyses of base-isolated buildings modelled as single degree-of-freedom (SDOF) and multi degree-of-freedom (MDOF) systems with linear and nonlinear...

  • Sea surface temperature in the Baltic Sea derived from Landsat 8 satellite data - path 194

    The data set contains high resolution sea surface temperature (SST) maps estimated from Landsat 8 Level 1 Thermal Infrared Sensor (TIRS) data using NLSST algorithm.  SST was calculated only for granules (185 x 180 km) from satellite path number 194, that covered at least 2000 km2 of the cloud-free area of the Baltic Sea.

  • Sea surface temperature in the Baltic Sea derived from Landsat 8 satellite data - path 192

    The data set contains high resolution sea surface temperature (SST) maps estimated from Landsat 8 Level 1 Thermal Infrared Sensor (TIRS) data using NLSST algorithm.  SST was calculated only for granules (185 x 180 km) from satellite path number 192, that covered at least 2000 km2 of the cloud-free area of the Baltic Sea.

  • Sea surface temperature in the Baltic Sea derived from Landsat 8 satellite data - path 191

    The data set contains high resolution sea surface temperature (SST) maps estimated from Landsat 8 Level 1 Thermal Infrared Sensor (TIRS) data using NLSST algorithm.  SST was calculated only for granules (185 x 180 km) from satellite path number 191, that covered at least 2000 km2 of the cloud-free area of the Baltic Sea.

  • Sea surface temperature in the Baltic Sea derived from Landsat 8 satellite data - path 193

    The data set contains high resolution sea surface temperature (SST) maps estimated from Landsat 8 Level 1 Thermal Infrared Sensor (TIRS) data using NLSST algorithm.  SST was calculated only for granules (185 x 180 km) from satellite path number 193, that covered at least 2000 km2 of the cloud-free area of the Baltic Sea.

  • Sea surface temperature in the Baltic Sea derived from Landsat 8 satellite data - path 190

    The data set contains high resolution sea surface temperature (SST) maps estimated from Landsat 8 Level 1 Thermal Infrared Sensor (TIRS) data using NLSST algorithm.  SST was calculated only for granules (185 x 180 km) from satellite path number 190, that covered at least 2000 km2 of the cloud-free area of the Baltic Sea.

  • Preserving Trees in Automata

    Publication

    - Year 2015

    We present a method to store additional information in a minimal automaton so that it is possible to compute a corresponding tree node number for a state. The number can then be used to retrieve additional information. The method works for minimal (and any other) deterministic acyclic finite state automata (DFAs). We also show how to compute the inverse mapping.

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  • OntoValidate: OntoNotes 5.0 NER validation dataset

    Open Research Data
    version 1.2 open access

    OntoValidate dataset consists of 603 randomly chosen raw textsfrom the original OntoNote 5.0 dataset (3637 raw texts in total).

  • Gdańsk 2019 Jana z Kolna street - video data

    Open Research Data
    open access

    Gdańsk 2019 Jana z Kolna street - video data

  • The assessment of microbiological purity of cosmetic preparations

    Open Research Data
    open access

    The dataset contains the results of a single series of determinations of the microbiological purity of the cosmetic based on the aqueous phase in the test for the total number of bacteria and the total number of yeasts.The tests were performed by preparing a series of decimal dilutions of the cosmetic in peptone water and performing in-depth culture...

  • 2-outer-independent domination in graphs

    Publication

    We initiate the study of 2-outer-independent domination in graphs. A 2-outer-independent dominating set of a graph G is a set D of vertices of G such that every vertex of V(G)\D has at least two neighbors in D, and the set V(G)\D is independent. The 2-outer-independent domination number of a graph G is the minimum cardinality of a 2-outer-independent dominating set of G. We show that if a graph has minimum degree at least two,...

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  • Common Independence in Graphs

    Publication

    - Symmetry-Basel - Year 2021

    Abstract: The cardinality of a largest independent set of G, denoted by α(G), is called the independence number of G. The independent domination number i(G) of a graph G is the cardinality of a smallest independent dominating set of G. We introduce the concept of the common independence number of a graph G, denoted by αc(G), as the greatest integer r such that every vertex of G belongs to some independent subset X of VG with |X|...

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  • Parity vertex colouring of graphs

    Publication

    - Discussiones Mathematicae Graph Theory - Year 2011

    A parity path in a vertex colouring of a graph is a path along which each colour is used an even number of times. Let Xp(G) be the least number of colours in a proper vertex colouring of G having no parity path. It is proved that for any graph G we have the following tight bounds X(G) <= Xp(G) <=|V(G)|− a(G)+1, where X(G) and a(G) are the chromatic number and the independence number of G, respectively. The bounds are improved for...

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  • On Computational Aspects of Greedy Partitioning of Graphs

    Publication

    - Year 2017

    In this paper we consider a problem of graph P-coloring consisting in partitioning the vertex set of a graph such that each of the resulting sets induces a graph in a given additive, hereditary class of graphs P. We focus on partitions generated by the greedy algorithm. In particular, we show that given a graph G and an integer k deciding if the greedy algorithm outputs a P-coloring with a least k colors is NP-complete for an infinite...

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  • Karolina Lademann mgr

    People

    Curriculum vitae

  • A novel degree-hour method for rational design loading

    Publication

    Cooling degree-hours (CDH) received the broadest application in evaluation of the ambient air cooling efficiency in power engineering (engine intake air cooling systems) and air conditioning. The current CDH numbers are defined as a drop in air temperature multiplied by associated time duration of performance and their summarized annual number is used to estimate the annual effect achieved due to sucked air cooling in power plants...

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  • Introduction of Pro and Its Analogues in the Conserved P1 Position of Trypsin Inhibitor SFTI-1 Retains Its Inhibitory Activity

    Publication
    • A. Legowska
    • D. Debowski
    • R. Lukajtis
    • E. Sztabkowska
    • A. Mizeria
    • K. Brzozowski
    • M. Wysocka
    • A. Lesner
    • K. Rolka

    - PROTEIN AND PEPTIDE LETTERS - Year 2011

    A number of monocyclic SFTI-1 analogues modified in the conserved inhibitor P1 position by Pro, its L-hydroxyproline (Hyp) derivative as well as mimetics with different ring size were synthesized by the solid-phase method. Replacement of Ser6 by Pro, Hyp, and a four-member ring, L-azetidine-2-carboxylic acid (Aze), retained trypsin or chymotrypsin inhibitory activity. The determined association equilibrium constants of these analogues...

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  • The Application of Fibres from Recycled Postconsumer Tyres for Concrete Reinforcement

    Publication

    - Year 2013

    Poland as a Member State is obliged to implement the EU specific environmental legislation focused on the reduction, transport and treatment of waste. The Landfill Directive prohibited the landfilling of whole tyres and their by-products. Although the EU Directive of Waste limits the use of tyres as secondary fuel, Poland is still the EU leader in burning tyres in cement kilns. Post-consumer tyres are utilised in a number of...

  • Józef Kotus dr hab. inż.

  • Jakub Szulwic dr inż.

    Jakub Szulwic (born 23 December 1974 in Bydgoszcz, Poland) – is an experienced, licensed Land Surveyor, specialized in construction monitoring by the use of photogrammetric methods and laser scanning technology. His specialization are geomatics and geoinformatics. He is an author about 100 publications including 50 indexed in Web of Science (H-index = 15) In 1993, He graduated from Secondary School in Tuchola, Poland on physics...

  • Tagged images with LEGO bricks part 2

    Open Research Data
    version 2.1 open access - series: LEGO

    The data set conatins tagged images conatining LEGO bricks used for traning LEGO bricks detecting network. The images contain random number of the same LEGO bricks on white background. Only the whole bricks are labeled.

  • The structure of the Polish banking sector in 2004-2018

    Open Research Data
    open access

    Dynamic changes in the banking system in the 1990s contributed to the relative stability of the number of banks in all sectors (state-owned, private, cooperative) after 2004. The total number of banks (including credit institutions) has decreased since 2004 from 653 to 612 in 2018 - it should therefore be noted that in the analyzed period the Polish...

  • STARZEJĄCY SIĘ PRZEDSIĘBIORCA W POLSCE I NA ŚWIECIE

    Poniższy artykuł wskazuje na rosnącą liczbę przedsiębiorców w wieku okołoemerytalnym, tak w krajach europejskich, w tym w Polsce, jak i w USA. Wzrost ten wynika zarówno z rosnącej liczby osób w tej grupie wiekowej, które zakładają swoje firmy, jak i z rosnącej liczby osób, które prowadząc od wielu lat swoje firmy, nie zamierzają przejść na emeryturę. Z nielicznych badań wśród osób starszych prowadzących własne firmy wynika, że...

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  • Implementation of discrete convolution using polynomial residue representation

    Publication

    - Year 2010

    Convolution is one of the main algorithms performed in the digital signal processing. The algorithm is similar to polynomial multiplication and very intensive computationally. This paper presents a new convolution algorithm based on the Polynomial Residue Number System (PRNS). The use of the PRNS allows to decompose the computation problem and thereby reduce the number of multiplications. The algorithm has been implemented in Xilinx...

  • Canonical switched capacitor converters. Comments, complements, and refinements

    Publication

    - Year 2017

    Switched Capacitor Converters (SCC) form useful blocks in low/medium power applications as they are suitable for integration, both as off-chip and on-chip IC realizations. However, the problem with SCC is that their voltage conversion ratio is topology-dependent. By changing the SC circuit configuration, we can gain control over voltage conversion but the available ratio remains of a discrete nature, i.e. it maps into a countable...

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  • Rural Design Studio- 2024

    e-Learning Courses
    • P. Duch-Żebrowska
    • M. Mochulska
    • M. Koperska-Kośmicka

    Summer practice - rural analysis, works on the map, in a terrain and with the people and subsequent Design Studio in winter semester of 2024/25

  • Clinical situations text database for Polish language

    Open Research Data

    Dataset contains a database of anonymized texts in Polish for the purposes of building a medical speech corpus,  for clinical situations in the following areas: medical interview, interview and description of the result of an oncological examination, description of a radiological examination, description of a pathomorphological examination, description...

  • Auditory Brainstem Responses recorded employing Audio ABR device

    Open Research Data
    open access

    The dataset consists of ABR measurements employing click, burst and speech stimuli. Parameters of the particular stimuli were as follows:

  • Aleksandra Parteka dr hab. inż.

    About me: I am an associate professor and head of doctoral studies at the Faculty of Management and Economics, Gdansk University of Technology (GdanskTech, Poland).  I got my MSc degree in Economics from Gdansk University of Technology (2003) and Universita’ Politecnica delle Marche (2005), as well as MA degree in Contemporary European Studies from Sussex University (2006, with distinction).  I received my PhD in Economics...

  • Thermal visualization of Ostwald-de Waele liquid in wavy trapezoidal cavity: Effect of undulation and amplitude

    Publication
    • A. Hijaz
    • R. Mahmood
    • M. B. Hafeez
    • A. H. Majeed
    • S. Askar
    • H. Shahzad

    - Case Studies in Thermal Engineering - Year 2022

    The present study is concerned with the numerical simulations of Ostwald-de Waele fluid flow in a wavy trapezoidal cavity in the presence of a heated cylinder situated at the center of the cavity. The work consists in characterizing the mixed convection as a function of the intensity of heat flow. The flow behaviour and temperature distribution in a cavity are the main focus of this study. The lower wall of the cavity is fixed...

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  • Computational aspects of greedy partitioning of graphs

    In this paper we consider a variant of graph partitioning consisting in partitioning the vertex set of a graph into the minimum number of sets such that each of them induces a graph in hereditary class of graphs P (the problem is also known as P-coloring). We focus on the computational complexity of several problems related to greedy partitioning. In particular, we show that given a graph G and an integer k deciding if the greedy...

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  • Computing dynamical curlicues

    Open Research Data

    A curlicue is a piece-wise linear curve in the complex plane which can be generated by an arbitrary sequence of real numbers u_n. It can be interpreted as a trajectory of a particle in the plane which starts in the origin at time t=0 and moves with a constant velocity, changing its direction at instances t=0,1,2,3,..., where the new direction is given...

  • Krzysztof Wach prof. dr hab.

    People

  • Epitaph of John Sinclair in St. Mary's Church in Gdańsk

    Open Research Data
    open access

    The data set concerns epigraphy. It refers to the epitaph placed in St. Mary’s Church in Gdańsk, which is dedicated to John Sinclair, an Scottish nobleman, the 6th count of Caithness. He was general and from 1716 was chief commandant of the defenses in Gdańsk. He died in 1731 in Gdańsk. Data set contains one general photo of the epitaph, transcription...

  • VIBRATION PARAMETERS FOR DAMAGE DETECTION IN STRUCTURES

    The aim of this paper is to examine how damage indicators are sensitive to changing number of frequencies and mode shapes and also to number and location of measurement points. The influence of measurement errors was also analyzed for all cases. For the analysis, those damage indicators are chosen which use changes in such modal parameters as natural frequencies and mode shapes and also differences between the curvatures of the damaged...

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  • Promocja zasobów Pomorskiej Biblioteki Cyfrowej na przykładzie XVIII-wiecznego rękopisu

    Celem artykułu jest przedstawienie sposobu udostępniania i promocji zbiorów rękopiśmiennych na przykładzie XVIII-wiecznego rękopisu Christiana Gabriela Fishera dostępnego w Pomorskiej Bibliotece Cyfrowej (dalej: PBC). Rękopis ten stał się inspiracją do podjęcia współpracy Biblioteki Politechniki Gdańskiej oraz Instytutu Kultury Miejskiej w Gdańsku. Dzięki wspólnej inicjatywie rozpoczęto prace nad transkrypcją niemieckiego tekstu...

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  • The Rayleigh model of the multipath fading channel

    The dataset contains the results of simulations that are part of the research on modelling the multipath fading in the communication channel. The Rayleigh fading envelope is generated using the Monte-Carlo simulation (MCS) in the LabVIEW programming environment.

  • Thermodynamic and geometrical characteristics of mixed convection heat transfer in the shell and coil tube heat exchanger with baffles

    The article presents passive heat transfer enhancement method in the form of baffles to increase the energy efficiency of the shell coil heat exchanger. Conducted literature review shows that, despite numer- ous studies, there is little work on the intensification of heat transfer at the shell side. Most of the work focuses on the impact of geometrical parameters of the coil itself. This article successfully proves that it is possible...

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  • Damage detection in plates based on Lamb wavefront shape reconstruction

    Publication

    - MEASUREMENT - Year 2021

    Many of the current studies in the area of damage detection using elastic wave propagation are based on deploying sensor networks with a large number of piezoelectric transducers to detect small-size cracks. A major limitation of these studies is that cracks are usually larger and have different shapes in real cases. Moreover, using a large number of sensing nodes for damage detection is both costly and computationally intensive....

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