Search results for: OPEN CHANNEL FLOW - Bridge of Knowledge

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Search results for: OPEN CHANNEL FLOW

Search results for: OPEN CHANNEL FLOW

  • Geology and hydrology

    e-Learning Courses
    • T. Kolerski
    • M. Przewłócka
    • M. Bratnikow

    W części "hydrology" studenci zapoznają się znastepującą tematyką: formowanie się opadu, pomiar opadu, spływ powierzchniowy, nadwyżka opadu, hydrogram jednostkowy, transformacja fali wezbraniowej, przepływ w kanale otwartym, podstawowe informacje o budowlach hydrotechnicznych. W częśi "geology" studenci zapoznają się z procesami wewnętrznymi i zewnętrznymi, zwłaszcza prowadzącymi do rozpoznawania skał i minerałów. Uczą się metod...

  • On local buckling of cold-formed channel members

    Publication

    The paper deals with local buckling of the compressed flanges of cold-formed thin-walled channel beams subjected to pure bending or axially compressed columns. Arbitrarily shaped flanges of open cross-sections and the web-flange interactions are taken into account. Buckling deformation of a beam flange is described by displacement related to torsion of the flange about the line of its connection with the web. Total potential energy...

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  • Wyznaczanie stref efektywności kanałów dystrybucji na przykładzie wybranego producenta artykułów

    Publication

    - Logistyka - Year 2015

    Wybór kanału dystrybucji zalicza się do decyzji strategicznych, ponieważ pod uwagę należy wziąć zarówno aspekty ekonomiczne, jak i te, które są związane z obsługą klienta. We współczesnych kanałach dystrybucji, które cechuje duża różnorodność wynikająca ze sposobu przepływu towarów z miejsca ich produkcji do miejsca konsumpcji, istotne znaczenie będzie miał sprawny i szybki przepływ strumieni finansowych, materiałowych i informacyjnych....

  • DETEKCJA FAL UDERZENIOWYCH W UKŁADACH ŁOPATKOWYCH CZĘŚCI NISKOPRĘŻNYCH TURBIN PAROWYCH

    Publication

    - Mechanik - Year 2015

    W artykule przedstawiono wyniki numerycznych symulacji okołodźwiękowego przepływu pary przez ostatnie stopnie części niskoprężnej turbiny o mocy 50 MW. Celem przeprowadzonych symulacji była detekcja oraz lokalizacja fali uderzeniowej, występującej dla przyjętej geometrii układu łopatkowego. Przeanalizowano również wpływ zmiany wartości ciśnienia na wlocie do rozpatrywanych stopni turbiny na maksymalną wartość...

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  • Modelowanie przepływu pary przez okołodźwiękowe wieńce turbinowe z użyciem sztucznych sieci neuronoych

    Publication

    Niniejszy artykuł stanowi opis modelu przepływu pary przez okołodźwiękowe stopnie turbinowe, stworzonego w oparciu o sztuczne sieci neuronowe (SSN). Przedstawiony model neuronowy pozwala na wyznaczenie rozkładu wybranych parametrów w analizowanym przekroju kanału przepływowego turbiny dla rozpatrywanego zakresu wartości ciśnienia wlotowego.

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  • Optimization of the distance between the vertical plates in the convective air heat exchanger

    This paper examines the influence of the distance between vertical plates on the intensity of free convective heat transfer along with the optimization of this distance. Experimental tests were carried out for one model channel of such an heat exchanger with widths , 0.085 and 0.18 m. This channel, open at the top and sides, was formed by two isothermal symmetrically heated parallel vertical plates of dimensions m and m. The influence...

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  • Modelowanie przepływu ustalonego niejednostajnego w sieciach kanałów otwartych z uwzględnieniem obiektów hydrotechnicznych

    Publication

    W pracy sformułowano zagadnienie brzegowe dla równania energii opisującego przepływ ustalony niejednostajny i przedstawiono sposób jego rozwiązania przy pomocy metody różnicowej. Zaproponowana metoda obliczeń nadaje się do analizy przepływu w dendrycznych i pierścieniowych sieciach kanałów otwartych. Ponadto na przykładzie przelewu prostokątnego zaproponowano metodę uwzględnienia w obliczeniach zabudowy hydrotechnicznej. Słowa...

  • Verification of the method of reconstructing convective velocity fields on the basis of temperature fields in vertical, differential and equally heated, open and closed channels

    This paper describes a method of reconstructing velocity fields, i.e. a numerical reconstruction procedure (NRP) that involves the numerical processing of experimentally measured temperature distributions in free convection heat transfer. The NRP consists in solving only the continuity and Navier–Stokes equations with an additional source term. This term is proportional to a known temperature (e.g. from a thermal imaging camera)...

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  • Model neuronowy jako alternatywa dla numerycznego modelu okołodźwiękowego przepływu pary przez palisadę turbinową.

    Publication

    - Mechanik - Year 2014

    Występowanie skośnej fali uderzeniowej w przepływie pary przez palisadę turbinową stanowi zagrożenie dla bezpiecznej pracy turbiny oraz dla jej elementów konstrukcyjnych. Detekcja oraz lokalizacja fali uderzeniowej, a także rozpoznanie przyczyny jej powstawania, nie są możliwe do osiągnięcia na drodze pomiarowej. Analizę zjawisk zachodzących wewnątrz kanału przepływowego umożliwiają natomiast modele numeryczne oraz neuronowe. Zaletą...

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  • Arsalan Muhammad Soomar Doctoral Student

    People

    Hi, I'm Arsalan Muhammad Soomar, an Electrical Engineer. I received my Master's and Bachelor's Degree in the field of Electrical Engineering from Mehran University of Engineering and Technology, Jamshoro, Sindh, Pakistan.  Currently enrolled as a Doctoral student at the Gdansk University of Technology, Gdansk, Poland. Also worked in Yellowlite. INC, Ohio  as a Solar Design Engineer.   HEADLINE Currently Enrolled as a Doctoral...

  • MOST Wiedzy jako narzędzie promocji potencjału naukowo-badawczego uczelni wyższej

    Rozwój Internetu wpłynął na wiele aspektów naszego życia. Pośród wielu z nich zrewolucjonizował sposób komunikacji. Pochodną tego jest zmiana sposobu przekazywania wszelkiego rodzaju wiedzy. Ogromne znaczenie mają przeszukiwane źródła wiedzy, ich jakość i dostępność. W związku z tym, w obecnych czasach, o potencjale naukowym uczelni wyższej stanowią, obok pracowników w nich zatrudnionych, przede wszystkim zgromadzone bazy wiedzy...

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  • Yade-open DEM: an open-source software using a discrete element methodto simulate granular material

    Publication

    - ENGINEERING COMPUTATIONS - Year 2008

    Purpose - YADE-OPEN DEM is an open source software based on the Discrete Element Method which uses object oriented programming techniques. The paper describes the softwarearchitecture.Design/methodology/approach - The DEM chosen uses position, orientation, velocity and angular velocity as independent variables of simulated particles which are subject to explicit leapfrog time-integration scheme (Lagrangian method). The three-dimensional...

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  • Kamila Kokot-Kanikuła mgr

    Kamila Kokot-Kanikuła is a digital media senior librarian at Gdańsk University of Technology (GUT) Library. She works in Digital Archive and Multimedia Creation Department and her main areas of interests include early printed books, digital libraries, Open Access and Open Science. In the Pomeranian Digital Library (PDL) Project she is responsible for creating annual digital plans, transferring files on digital platform, and promoting...

  • Dissociative multi-photon ionization of isolated uracil and uracil-adenine complexes

    Publication
    • M. Ryszka
    • R. Pandey
    • C. Rizk
    • J. Tabet
    • B. Barc
    • M. Dampc
    • N. Mason
    • S. Eden

    - INTERNATIONAL JOURNAL OF MASS SPECTROMETRY - Year 2016

    Recent multi-photon ionization (MPI) experiments on uracil revealed a fragment ion at m/z 84 that was proposed as a potential marker for ring opening in the electronically excited neutral molecule. The present MPI measurements on deuterated uracil identify the fragment as C3H4N2O+ (uracil+ less CO), a plausible dissociative ionization product from the theoretically predicted open-ring isomer. Equivalent measurements on thymine...

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  • Automatic Emotion Recognition in Children with Autism: A Systematic Literature Review

    Publication

    - SENSORS - Year 2022

    The automatic emotion recognition domain brings new methods and technologies that might be used to enhance therapy of children with autism. The paper aims at the exploration of methods and tools used to recognize emotions in children. It presents a literature review study that was performed using a systematic approach and PRISMA methodology for reporting quantitative and qualitative results. Diverse observation channels and modalities...

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  • Transactions of the Institute of Fluid-Flow Machinery

    Journals

    ISSN: 0079-3205

  • Marek Czachor prof. dr hab.

  • Transfer learning in imagined speech EEG-based BCIs

    Publication

    - Biomedical Signal Processing and Control - Year 2019

    The Brain–Computer Interfaces (BCI) based on electroencephalograms (EEG) are systems which aim is to provide a communication channel to any person with a computer, initially it was proposed to aid people with disabilities, but actually wider applications have been proposed. These devices allow to send messages or to control devices using the brain signals. There are different neuro-paradigms which evoke brain signals of interest...

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  • Hybrid P3HT: PCBM/GaN nanowire/Si cascade heterojunction for photovoltaic application

    Publication

    - JOURNAL OF NANOPARTICLE RESEARCH - Year 2020

    Poly(3-hexylthiophene) (P3HT) and phenyl-C61-butyric acid methyl ester (PCBM) are commonly used for the fabrication of organic photovoltaics (OPV). Efficiency limitations of OPVs could be circumvented by incorporation of inorganic nanostructures into organic blends. Again, integration of organic solar cells with well-developed silicon photovoltaic technology is ultimately desirable. In present work, GaN nanowires with diameters...

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  • development of an open source software to transform acoustic data for classification of benthic habitat

    Publication

    - HYDROACOUSTICS - Year 2007

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  • Open Access w naukach biomedycznych

    Publication

    Open Access (OA) Movement to nazwa ruchu społecznego, którego celem jest zminimalizowanie przeszkód w upowszechnianiu wyników badań naukowych, a także bardziej efektywne wykorzystywanie nakładów na naukę. Jego historia sięga lat sześćdziesiątych XX wieku, kiedy pojawiły się pierwsze formy sieci rozległych, ale zasadniczy rozwój nastąpił w latach dziewięćdziesiątych wraz z nadejściem tzw. ery cyfrowej. Pojawiła się wówczas koncepcja...

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  • [ITiT] Transmission Channel in Radio Communication Systems

    e-Learning Courses
    • S. J. Ambroziak

    {mlang pl} Dyscyplina: informatyka techniczna i telekomunikacja Zajęcia fakultatywne dla doktorantów II roku Prowadzący:  dr hab. inż. Sławomir Ambroziak, prof. PG Liczba godzin: 15 Forma zajęć: wykład {mlang} {mlang en} Discipline: technical informatics and telecommunications Elective course for 2nd-year PhD students Academic teachers: dr hab. inż. Sławomir Ambroziak, prof. PG Total hours of training: 15 teaching hours Course...

  • Fizyka Kwantowa dla Inżyniera Open Access

    e-Learning Courses
    • K. Wrzask

    Kurs Fizyka Kwantowa jest propozycją Open Access. Na kurs można się zapisać samodzielnie.

  • Wykorzystanie mediów społecznościowych do promocji otwartości w badaniach naukowych na przykładzie Biblioteki Politechniki Gdańskiej

    Publication

    - Year 2021

    Media społecznościowe są jednym ze sposobów na skuteczną promocję zasobów oraz usług bibliotecznych w obecnym świecie cyfrowym. Stanowią również niedocenianą możliwość komunikacji pomiędzy naukowcami, bibliotekarzami a czytelnikami. Biblioteka akademicka może aktywnie angażować się w proces upowszechniania dorobku naukowego uczelni, podejmując w tym celu różnorakie działania marketingowe, wykorzystując takie serwisy jak: Facebook,...

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  • The Boltzmann sequence-structure channel

    Publication

    - Year 2016

    We rigorously study a channel that maps binary sequences to self-avoiding walks in the two-dimensional grid, inspired by a model of protein statistics. This channel, which we also call the Boltzmann sequence-structure channel, is characterized by a Boltzmann/Gibbs distribution with a free parameter corresponding to temperature. In our previous work, we verified experimentally that the channel capacity has a phase transition for...

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  • The Discrete-Continuous, Global Optimisation of an Axial Flow Blood Pump

    This paper presents the results of the discrete-continuous optimisation of an axial flow blood pump. Differential evolution (DE) is used as a global optimisation method in order to localise the optimal solution in a relatively short time. The whole optimisation process is fully automated. This also applies to geometry modelling. Numerical simulations of the flow inside the pump are performed by means of the Reynolds-Average Navier-Stokes...

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  • Magdalena Szuflita-Żurawska

    Head of the Scientific and Technical Information Services at the Gdansk University of Technology Library and the Leader of the Open Science Competence Center. She is also a Plenipotentiary of the Rector of the Gdańsk University of Technology for open science.  She is a PhD Candidate. Her main areas of research and interests include research productivity, motivation, management of HEs, Open Access, Open Research Data, information...

  • Making full and immediate Open Access a reality through the repository route – the role of open repositories in implementation of Plan S.

    Publication

    Thesis/Objective: In 2018, research funding institutions associated in cOAlitionS issued PlanS document which aims to accelerate the transition to full and immediate Open Access to publications from publicly funded research until January 2021. Among the recommendations, which mainly relate to publishing in the Open Access model and its financing, there are also guidelines on the implementation of Plan S assumptions through the...

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  • Outlet Flow Velocity In Circular Culvert

    The outlet flow velocity in the end section of the culvert barrel depends in most cases on the culvert geometry, including the barrel slope, as well as on upstream and downstream channel parameters. Flowing water can create pressure flow or free surface flow in the culvert barrel. In the case of an unsubmerged barrel outlet, the free-surface flow is more frequent than the full flow. Increased velocities can cause channel bed scour...

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  • Phase Transition in a Sequence-Structure Channel

    Publication

    - Year 2015

    We study an interesting channel which maps binary sequences to self-avoiding walks in the two-dimensional grid, inspired by a model of protein folding from statistical physics. The channel is characterized by a Boltzmann/Gibbs distribution with a free parameter corresponding to temperature. We estimate the conditional entropy between the input sequence and the output fold, giving an upper bound which exhibits an unusual phase transition...

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  • [ITiT] Transmission Channel in Radio Communication Systems - 2023/2024

    e-Learning Courses
    • S. J. Ambroziak

    {mlang pl} Dyscyplina: informatyka techniczna i telekomunikacja Zajęcia fakultatywne dla doktorantów II roku Prowadzący:  dr hab. inż. Sławomir Ambroziak, prof. PG Liczba godzin: 15 Forma zajęć: wykład {mlang} {mlang en} Discipline: technical informatics and telecommunications Elective course for 2nd-year PhD students Academic teachers: dr hab. inż. Sławomir Ambroziak, prof. PG Total hours of training: 15 teaching hours Course...

  • A simplified channel estimation procedure for NB-IoT downlink

    Publication

    - Year 2024

    This paper presents a low-complexity channel estimation procedure which is suitable for use in energy-efficient NB-IoT user equipment devices. The procedure is based on the well-established least squares scheme, followed by linear interpolation in the time domain and averaging in the frequency domain. The quality of channel estimation vs. signal-to-noise ratio is evaluated for two channel models and compared with the performance...

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  • A simple test for quantum channel capacity

    Publication

    Based on state and channel isomorphism we point out that semidefiniteprogramming can be used as a quick test for nonzero one-way quantum channelcapacity. This can be achieved by searching for symmetric extensions of statesisomorphic to a given quantum channel. With this method we provide examplesof quantum channels that can lead to high entanglement transmission but stillhave zero one-way capacity, in particular, regions of symmetric...

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  • A Simplistic Downlink Channel Estimation Method for NB-IoT

    Publication

    This paper presents a downlink channel estimation method intended for a Narrowband Internet of Things (NB-IoT) access link. Due to its low computational complexity, this method is well suited for energy-efficient IoT devices, still providing acceptable reception quality in terms of signal-to-noise (SNR) performance. This paper describes the physical layer of NB-IoT within the scope of channel estimation, and also reviews existing...

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  • Restricted open shop scheduling

    In the real applications the open shop scheduling models often require some additional constraints and adequate models. We concern the restrictions in the open shop scheduling related to an instance of the problem and to a feasible solution. Precisely, we require that each jobs consists of the bounded number of operations and each machine has a bounded load (i.e., the total number of operations executed on this machine in a schedule)....

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  • On the Characteristic Graph of a Discrete Symmetric Channel

    We present some characterizations of characteristic graphs of row and/or column symmetric channels. We also give a polynomial-time algorithm that decides whether there exists a discrete symmetric channel whose characteristic graph is equal to a given input graph. In addition, we show several applications of our results.

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  • Wykorzystanie zasobów Open Access w pracy dydaktycznej

    e-Learning Courses
    • M. Szuflita-Żurawska

    CELCelem szkolenia jest zapoznanie kadry naukowo-dydaktycznej i młodych naukowców z zasobami Open Access (OA), które są powszechnie dostępne i mogą stanowić alternatywę dla zbiorów subskrypcyjnych.Szkolenie pokaże praktyczne zastosowanie publikacji OA w pracy dydaktycznej i przybliży proces udostępniania własnych materiałów w wybranym modelu Otwartego Dostępu, z uwzględnieniem praw autorskich. Zapewni również rozwijanie kompetencji...

  • Local buckling of composite channel columns

    The investigation concerns local buckling of compressed flanges of axially compressed composite channel columns. Cooperation of the member flange and web is taken into account here. The buckling mode of the member flange is defined by rotation angle a flange about the line of its connection with the web. The channel column under investigation is made of unidirectional fibre-reinforced laminate. Two approaches to member orthotropic...

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  • Fluid Flow Machinery

    e-Learning Courses
    • K. Kosowski

    Podstawowe informacje dotyczące obiegów cieplnych siłowni z turbinami parowymi i gazowymi. Główne elementy siłowni turbinowych. Zagadnienia przepływowe  maszyn wirnikowych. Teoria stopni turbinowych. Część przepływowa turbin.

  • Fluid Flow Machinery

    e-Learning Courses
    • K. Kosowski

    Podstawowe informacje dotyczące obiegów cieplnych siłowni z turbinami parowymi i gazowymi. Główne elementy siłowni turbinowych. Zagadnienia przepływowe  maszyn wirnikowych. Teoria stopni turbinowych. Część przepływowa turbin.

  • The Bridge to Knowledge – Open Access to Scientific Research Results on Multidisciplinary Open System Transferring Knowledge Platform

    Publication

    The European policy of Open Access to scientific research is now one of the key issues discussed in public debates on the future development of scientific communication. The implementation of Open Access tools has significant impact on scientific and economic growth. On the one hand, Open Access accelerates disseminating new research findings and facilitates recognition of authors on a more global scale. On the other hand, Open...

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  • Estimation of Coherence Bandwidth for Underwater Acoustic Communication Channel

    Publication

    A shallow underwater acoustic communication channel is characterized by strong multipath propagation. The signal reaching the receiver consists of a direct waveform and a number of its delayed and suppressed replica. A significant time dispersion of the transmitted signal and selective fading of its spectrum are observed. Coherence bandwidth defines maximal bandwidth, wherein the channel amplitude characteristic remains constant...

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  • What Skills for Multi-Partner Open Innovation Projects? Open Innovation Competence Profile in a Cluster Ecosystem Context

    Publication

    Industry 4.0 and the turbulent environment have rendered increasing interest in open inno- vation that extends from the bilateral transmission of expertise to multilateral platform collaborations. Open innovation ventures are seen as intricate collaborations that require the commitment of numer- ous partners during the lifetime of the project. In order to examine the specific competence of open innovation teams, we set the research...

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  • Trouble in Paradise? Barriers to Open Innovation in Regional Clusters in the Era of the 4th Industrial Revolution

    The purpose of this paper is to provide an insight into the barriers faced by clusters as open innovation intermediaries. Literature review and an empirical study were performed, involving a nation-wide survey, case studies, and in-depth interviews with cluster actors involved in open innovation activities. This article conceptually links open innovation and clusters in the context of the fourth industrial revolution, empirically...

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  • Application of spatial neural simulators of turbine blade rows to fluid flow diagnostics

    Publication

    - Year 2014

    This chapter presents the results of neural modelling of fluid flow in steam turbine row. In modelling working conditions of the flow channel varied, thus the aim of the work was to reconstruct the reference state - distributions of velocity, pressure, and losses in flow channel - with high accuracy for fluid flow diagnostics.

  • Seminarium Baltazar Open Days

    Publication

    Artykuł syntetycznie przedstawia zagadnienia poruszone podczas seminarium dotyczącego konstrukcji kompozytowych Baltazar Open Days 2016, które odbyło się w dniach 6-8.12.2016 w Ostródzie.

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  • Limitations of WSSUS modeling of stationary underwater acoustic communication channel

    Publication

    - HYDROACOUSTICS - Year 2016

    Performances of underwater acoustic communication (UAC) systems are strongly related to specific propagation conditions of the underwater channel. Due to their large variability, there is a need for adaptive matching of the UAC systems signaling to the transmission properties of the channel. This requires a knowledge of instantaneous channel characteristics, in terms of the specific parameters of stochastic models. The wide-sense...

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  • Characteristics of the polarised off-body channel in indoor environments

    Publication

    This paper addresses the depolarisation effect in off-body body area networks channels, based on measurements performed at 2.45 GHz in an indoor environment. Seven different scenarios, involving both static and dynamic users, were considered, taking a statistical perspective. The analysis of the cross-polarisation discrimination is performed, as well as the analysis of path loss in co- and cross-polarised channels. Results show...

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  • Wideband Off-Body Channel Characteristics with Dynamic User

    Publication

    - Year 2019

    This paper presents the preliminary results of a dynamic off-body channel characterisation study, based on wideband measurements at 5.8 GHz in an indoor environment. The Channel Impulse Response (CIR) was measured for a scenario with the user approaching and departing from the off-body antenna. A CIR deconvolution procedure was performed jointly in two polarisations, and the received signal power, Cross-Polarisation Discrimination...

  • Sławomir Jerzy Ambroziak dr hab. inż.

    Sławomir J. Ambroziak was born in Poland, in 1982. He received the M.Sc., Ph.D. and D.Sc. degrees in radio communication from Gdańsk University of Technology (Gdańsk Tech), Poland, in 2008, 2013, and 2020 respectively. Since 2008 he is with the Department of Radiocommunication Systems and Networks of the Gdańsk Tech: 2008-2013 as Research Assistant, 2013-2020 as Assistant Professor, and since 2020 as Associate Professor. He is...