Wyniki wyszukiwania dla: RIVER HYDRAULICS

• An attempt to identify volatile and semi-volatile organic compounds present in the Odra river waters.

  Publikacja

  • A. Kuczyńska
  • L. Wolska
  • J. Namieśnik

  - Rok 2004

  Celem pracy była identyfikacja związków z grup lotnych i średniolotnych związkó organicznych. W badaniach wykorzystano technikę Pt-TD-GC-MS. Komputerowa analiza widm masowych wykazała obecność wielu związków organicznych pochodxenia naturalnego i antropogenicznego. W powłokach wód pobranych w okolicy Brzegu Dolnego oznaczono stężenia związków chloroorganicznych na poziomie pojedynczych prób. Nieco wyższe spektrum związków chloroorganicznych,...

• Tea and Liver Antioxidant Capabilities in Ethanol Toxicity

  Publikacja

  • W. Łuczaj
  • A. Augustyniak
  • E. Skrzydlewska

  - Rok 2013

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• Excitation-independent constant conductance isfet driver

  Publikacja

  • M. Kokot
  • T. Ossowski

  - Metrology and Measurement Systems - Rok 2009

  A new constant conductance driver for ISFETs sensors has been developed. The proposed circuit maintains the sensor operating point at constant drain-source conductance. The combination of a simple, self-balancing resistance bridge and the subtraction half (or similar fraction) of source-drain voltage from the gate-source voltage provides the independence of output signal from current and voltage drivers instability. The use of...

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• The impact of the temperament model on the behavior of an autonomous driver

  Publikacja

  • Z. Kowalczuk
  • O. Piechowski
  • M. Czubenko

  - IFAC-PapersOnLine - Rok 2019

  Because it is generally believed that the personality and temperament of a human driver influence his/her behavior on the road, the article presents a computational model of the temperament of an autonomous agent - a driver. First, a short review of the four ideas of Galen’s temperament in psychology is presented. Temperament traits are grouped into four other sets, one of which is chosen for implementation in the project of integration...

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• Psychosocial risks associated with the profession of train driver

  Publikacja

  • B. Basińska
  • O. Reczek

  - Internal Security - Rok 2016

  Excellent competencies as well as a good physical and mental health are required in train drivers’ profession. Despite the changes in the structure of employment the train drivers above 46 years and job tenure longer than 30 years are the largest group. The generation gap is becoming more pronounced, and its fulfilment will not be easy. It is related not only to training of new personnel but also promotion of healthy work environment...

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• Emotions Embodied in the SVC of an Autonomous Driver System

  Publikacja

  • Z. Kowalczuk
  • M. Czubenko

  - IFAC-PapersOnLine - Rok 2017

  A concept of embodied intelligence (EI) is considered. None of such implementations can be fully identified with artificial intelligence. Projects that dare to approach AI and EI should be based on both the AI concepts (symbolic and sub-symbolic), in solving real problems of perception and decision-making. Therefore, the EI, in this paper, is understood as a methodology that uses all available resources and algorithms from the...

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• Influence of ducting geometry on working parameters of pipe type hydraulic turbines

  Publikacja

  • J. Iwan

  - Rok 2010

  Mała energetyka wodna. Omówiono własności użytkowe - głównie, sprawność i adaptacyjność - uzyskiwane poprzez rozwiązania układów turbinowych stosowanych w obszarze zagospodarowywania piętrzeń niskospadowych. Wskazano przyczyny od których te własności zależą. Pokazano też przykład rozwiązania o pożądanych własnościach dla zagospodarowywania obiektów w mało atrakcyjnym ekonomicznie obszarze piętrzeń najniższych.

• New components for hydraulic drive systems and their performance in thermal shock conditions

  Publikacja

  • R. Jasiński
  • L. Osiecki

  - Rok 2009

  Artykuł prezentuje konstrukcję pomp z rozrządem krzywkowym typu PWK o zmiennej wydajności wraz ze wstępnymi wynikami badań prototypu PWKZ-78. Przedstawiono także wstępne wyniki analiz MES i CFD zjawisk zachodzących w pracującej pompie. W drugiej części zaprezentowano metodykę badań zachowania się pomp w warunkach szokutermicznego i wyniki uzyskane dla pompy typu PWK.

• DFMA guidelines and a data base system in integrated development of hydraulic pumps

  Publikacja

  • W. Przybylski
  • M. Siemiątkowski

  - Rok 2006

  Przedstawiono koncepcję budowy systemu decyzyjnego, dla zintegrowanego rozwoju pomp hydraulicznych oraz doboru adekwatnych technik wytworzenia komponentów i procesów montażu, z zastosowaniem metodyki SADT/IDEF0 oraz ogólnych wytycznych DFMA. Omówiono stosowane w przemyśle krajowym konstrukcje pomp zębatych z łożyskami tocznymi oraz udoskonalone rozwiązania projektowe tych pomp z łożyskami ślizgowymi (polimerowymi). Wskazano na...

• Influence of the low ambient temperature on the start-up process of hydraulic pumps

  Publikacja

  • R. Jasiński

  - Rok 2019

  Starting hydraulic pumps in low ambient temperatures may cause: decreased hydraulic-mechanical efficiency, larger vibration of hydraulic installation, faster wear and more frequent damage to the elements of pumps, change of material properties of elements, increase of pressure drop. As a result of pressure drop in the suction pipe, large underpressure may be experienced, causing incomplete filling of pump working chambers with...

• Evaluation of losses in a hydraulic motor based on the SWSB - 63 motor tests

  Publikacja

  • A. Maczyszyn

  - Polish Maritime Research - Rok 2010

  In this paper are compared two models of energy losses: that suggested by Prof. Paszota,Z. in monograph "Energy losses in the hydraulic displacement motors - definitions and relations serving the evaluation of the efficiency of hydrostatic drive" [18] and that ofProf. Balawender, A. in "Energy analysis and methodology of testing of low-speed hydraulic motors" [1]. By using the data obtained from the tests of SWSB-63 hydraulic motors...

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• The basics of design and experimental tests of the commutation unit of a hydraulic satellite motor

  Publikacja

  • P. Śliwiński

  - Archives of Civil and Mechanical Engineering - Rok 2016

  he article presents an analytical method to design the commutation unit in a hydraulic satellite motor. It is shown that the size of the holes feeding the working chambers and their location on the plates closing those chambers depends on the geometrical dimensions of the working mechanism. The overlap in the commutation unit depends on the rotational speed range. It is demonstrated that the geometrical dimensions of the commutation...

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• Effect of surface roughness on thermal-hydraulic characteristics of plate heat exchanger

  Publikacja

  • J. Wajs
  • D. Mikielewicz

  - Key Engineering Materials - Rok 2014

  In the paper the experimental analysis of passive heat transfer intensification in the case of modeled plate heat exchanger is conducted. The plate heat exchanger is chosen for the analysis because this kind of heat exchangers could be prospectively applied in the ORC systems, however other areas or application are equally possible. The experimental setup was assembled at the Department of Energy and Industrial Apparatus of Gdansk...

• Recovery of Anammox Biomass at Short Hydraulic Retention Time in a MBR Reactor

  Publikacja

  • K. Wiśniewski
  • J. Mąkinia

  - Rok 2016

  The anammox system has been consider as an economical option for treating high concentration of nitrogen and poor in biodegradable orgaednic carbon wastewaters. This process is attractive option compared with conventional nitrogen removal because it provides a significant saving in aeration and organic addition for denitrification. The anammox technology has been applied mostly for concentrated nitrogenous wastewater containing...

• Model of the hydraulic pump powertrain of refuse collection vehicle compaction mechanism

  Publikacja

  • J. Czyżewicz
  • J. Kropiwnicki
  • O. Wysocki

  - Combustion Engines - Rok 2015

  W pracy przedstawiono symulację pracy układu napędowego pompy hydraulicznej mechanizmu prasującego śmieciarki oraz wpływ różnych konfiguracji elementów składowych tego urządzenia na zużycie paliwa silnika napędowego w warunkach przyjętego cyklu obciążenia. W tym celu wykorzystano model układu napędowego pompy hydraulicznej mechanizmu prasującego śmieciarki w formie grafów wiązań oraz wyniki pomiarów ciśnienia roboczego w siłownikach...

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• Influence of type of material on performance of hydraulic components in thermal shock conditions

  Publikacja

  • R. Jasiński

  - Solid State Phenomena - Rok 2012

  During the start-up of a hydraulic system in low ambient temperatures an incorrect operation may occur. The principles and conditions of safely operating hydraulic driven machines and devices are essential to designers and operators. For this reason the author of this article has conducted a series of tests on hydraulic components and systems in thermal shock conditions (cooled-down components were supplied with hot working medium)....

• Investigation method and mathematical model of pressure losses in hydraulic rotary motor

  Publikacja

  • A. Maczyszyn

  - Polish Maritime Research - Rok 2018

  Tis paper presents a way of determining the coefcient k of the pressure losses Δp (fow drag) in internal ducts 8 Mp of SWSB-63 hydraulic motor. Te coefcient is determined at a fow rate equal to the theoretical capacity Q of the Pt pump feeding the motor , the losses are related to the nominal pressure p in the hydraulic system. Te investigations n followed a model of energy performance of hydraulic rotary motor, proposed by...

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• Thermal and hydraulic phenomena in boundary layer of minijets impingement on curved surfaces

  Publikacja

  • T. Kura
  • E. Fornalik-Wajs
  • J. Wajs

  - Archives of Thermodynamics - Rok 2018

  Presented work considers flow and thermal phenomena occurring during the single minijet impingement on curved surfaces, heated with a constant heat flux, as well as the array of minijets. Numerical analyses, based on the mass, momentum and energy conservation laws, were conducted, regarding single phase and two-phase simulations. Focus was placed on the proper model construction, in which turbulence and boundary layer modeling...

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• RESEARCH OF HYDRAULIC PISTON PUMPS’ START-UP IN LOW AMBIENT TEMPERATURES

  Publikacja

  • R. Jasiński

  - Rok 2017

  Starting hydraulic pumps in low ambient temperatures may cause: decreased hydraulic-mechanical efficiency, larger vibration of hydraulic installation, faster wear and more frequent damage to the elements of pumps, change of material properties of elements, increase of pressure drop. As a result of increase of resistance of cold oil flow in the suction pipe, large underpressure may be experienced, causing incomplete filling of pump...

• Comparative analysis of process alternatives for manufacturing piston rods of hydraulic cylinders.

  Publikacja

  • W. Przybylski
  • M. Siemiątkowski

  - Rok 2004

  Zawarto wyniki analiz porównawczych alternatywnych technologii tłoczysk siłowników hydraulicznych w warunkach elastycznej automatyzacji wytwarzania. Uwzględniając zarówno tradycyjne struktury tych procesów z operacjami szlifowania i polerowania, jak i nowoczesne technologie z operacjami nagniatania, przedstawiono zintegrowane podejście do planowania sekwencji operacji procesu i harmonogramowania zadań produkcyjnych wraz z algorytmem...

• Is the Fatty Acids Profile in Blood a Good Predictor of Liver Changes? Correlation of Fatty Acids Profile with Fatty Acids Content in the Liver

  Publikacja

  • D. Maciejewska
  • J. Palma
  • K. Dec
  • K. Skonieczna-Żydecka
  • I. Gutowska
  • M. Szczuko
  • K. Jakubczyk
  • E. Stachowska

  - Diagnostics - Rok 2019

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• Problems of the starting and operating of hydraulic components and systems in low ambient temperature. Part III.Methods of determining parameters for correct start-ups of hydraulic components and systems in low ambient temperatures

  Publikacja

  • R. Jasiński

  - Polish Maritime Research - Rok 2009

  W artykule przedstawiono metody: eksperymentalną, analityczną i symulacji komputerowej określania zdatności oziębionych zespołów hydraulicznych do pracy w warunkach zasilania gorącym czynnikiem roboczym powodujących tzw. szok termiczny.

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• Occurrence and variability of River Habitat Survey features across Europe and the consequences for data collection and evaluation

  Publikacja

  • K. Szoszkiewicz
  • A. Buffagni
  • J. Davy-Bowker
  • J. Lesny
  • B. Chojnicki
  • J. Zbierska
  • R. Staniszewski
  • T. Zgola

  - HYDROBIOLOGIA - Rok 2006

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• Anti-inflammatory drugs in the Vistula River following the failure of the Warsaw sewage collection system in 2019

  Publikacja

  • P. Stepnowski
  • D. Wolecki
  • A. Puckowski
  • M. Paszkiewicz
  • M. Caban

  - Science of The Total Environment - Rok 2020

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• Characterisation and OSL dating of modern fluvial sediments in the lower Vistula River: testing the zeroing assumption

  Publikacja

  • K. Przegiętka
  • P. Molewski
  • W. Juśkiewicz
  • P. Palczewski
  • M. Chabowski

  - Bulletin of Geography. Physical Geography Series - Rok 2016

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• The present condition of the Vistula river catchment area and its impact on the Baltic Sea coastal zone

  Publikacja

  • B. Buszewski
  • T. Buszewska
  • A. Chmarzyński
  • T. Kowalkowski
  • J. Kowalska
  • P. Kosobucki
  • R. Zbytniewski
  • J. Namieśnik
  • A. Kot-Wasik
  • J. Pacyna... i 2 innych

  - Rok 2005

  Praca przeglądowa - opisuje stan zlewiska rzeki Wisły i morza Bałtyckiego, pod względem geograficznym, środowiskowym i socjo-ekonomicznym.

• Toluene in benthic sediments in the Odra river after the 1997 flood: an attempt to identify the origin of toluene

  Publikacja

  • M. Marczak
  • L. Wolska
  • J. Namieśnik

  - POLISH JOURNAL OF ENVIRONMENTAL STUDIES - Rok 2003

  Rzeka Odra transportuje i kumuluje duże ilości substancji pochodzenia naturalnego jak i antropogenicznego. Ujście Odry stanowi ważne źródło zanieczyszczenia Morza Bałtyckiego. Zadziwiającym rezultatem badań prowadzonych w ramach międzynarodowego projektu Odra (IOP) było wykrycie toluenu w osadach dennych. Nie odnaleziono wówczas przyczyn zanieczyszczenia osadów dennych tym związkiem. Zmiana stężenia toluenu wzdłuż całej długości...

• Flooding Extent Mapping for Synthetic Aperture Radar Time Series Using River Gauge Observations

  Publikacja

  • T. E. Berezowski
  • T. Bieliński
  • J. Osowicki

  - IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing - Rok 2020

  The flooding extent area in a river valley is related to river gauge observations such as discharge and water elevations. The higher the water elevations, or discharge, the larger the flooding area. Flooding extent maps are often derived from synthetic aperture radar (SAR) images using thresholding methods. The thresholding methods vary in complexity and number of required parameters. We proposed a simple thresholding method that...

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• Plastic Debris in the Stomach of the Invasive Signal Crayfish Pacifastacus leniusculus from a Baltic Coastal River

  Publikacja

  • A. Dobrzycka‐Krahel
  • M. Skóra
  • A. Pladzyk

  - Water - Rok 2024

  Pollution by plastic debris, widely recognized as a growing global problem [1-3] is caused by the production of synthetic polymers. Over recent years, the production of plastics has increased, while in Europe, fossil-based plastics production has decreased, and recycled plastics production has increased [4]. There are different types of plastics. Some types of plastic ingredients, applied in a wide variety of cosmetics and personal...

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• Effects of biotransport and hydro-meteorological conditions on transport of trace elements in the Scott River (Bellsund, Spitsbergen)

  Publikacja

  • S. Lehmann-konera
  • W. Kociuba
  • S. Chmiel
  • Ł. Franczak
  • Ż. Polkowska

  - PeerJ - Rok 2021

  The shaping of surface water chemistry in the Svalbard Archipelago is strongly dependent on the geology of the catchment and the process of long-range transport of atmospheric pollutants (LRATP). It was found that the dissolved trace elements in the Scott River, which catchment is characterized by a decreasing degree of glaciation, were of the natural origin (i.a. weathering and dissolution of local geological substratum). The...

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• Impact of Climate Change on a Runoff Formation in Seaside Catchment Area on the Example of the Babica River Catchment

  Publikacja

  • P. Zima

  - Rok 2018

  The paper presents the impact of taking into account climate change in the perspective of 2050 on the results of hydrological calculations of characteristic flows in the hydrographically diverse seaside catchment area on the example of the Babica river catchment. A mathematical model of the Babica river catchment was made in the HEC-HMS program. The SCS method was used. The outflow from the basin was analysed for waters with...

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• Impact of maintenance of floodplains of the Vistula River on high water levels on the section from Włocławek to Toruń

  Publikacja

  • D. Gąsiorowski
  • M. Szydłowski

  - Acta Energetica - Rok 2013

  This article describes the methodology of hydraulic calculations to estimate the water levels in open channels for steady gradually varied flow. The presented method has been used to analyse the water level on the Vistula River from Włocławek cross-section to Toruń cross-section. The HEC-RAS modelling system has been used for parameterization of the river channel and floodplains, as well as for flow simulation. The results obtained...

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• The selected hydrotechnical conditions of the Dnieper – Bug Channel and the Pripyat River in the development of the International Waterway E40

  Publikacja

  • M. Kalinowski
  • R. Koba
  • P. Jerzyło

  - Bulletin of the Maritime Institute in Gdańsk - Rok 2017

  International waterway E40 (MDW E40) is included in the network of inland waterways of transnational importance. It is a link between two areas: the Baltic Sea and the Black Sea. E40 route runs through three countries: Poland, Belarus and Ukraine. The article presents the results of the study on the analysis of two very important sections of the MDW E40 on the Belarusian section, it is:. the Dnieper – Bug Channel and the Pripy...

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• Flood Modelling and Risk Analysis of Cinan Feizuo Flood Protection Area, Huaihe River Basin

  Publikacja

  • U. Farooq
  • A. Taha Bakheit Taha
  • F. Tian
  • X. Yuan
  • M. Ajmal
  • I. Ullah
  • M. Ahmad

  - Atmosphere - Rok 2023

  This study evaluated multiple aspects of flood risks and effects on the Cinan Feizuo flood protection area in the Huaihe River basin. Flooding remains a leading problem for infrastructure, especially in urban, residential areas of the region. Effective flood modeling for urbanized floodplains is challenging, but MIKE (ID-2D) is paramount for analyzing and quantifying the risk in the vulnerable region. The Saint-Venant equation...

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• Editorial “Nutrition and Dietary Intake for Liver-Related Diseases”

  Publikacja

  • E. Stachowska
  • K. Jakubczyk
  • D. Maciejewska-Markiewicz

  - Nutrients - Rok 2021

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• Pathomorphology of the Liver in Dogs with Clinical Signs of Portosystemic Shunts

  Publikacja

  • M. Sobczak-Filipiak
  • P. Trębacz
  • E. Trębacz
  • M. Januchta
  • M. Galanty

  - JOURNAL OF COMPARATIVE PATHOLOGY - Rok 2009

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• Gate Driver with Overcurrent Protection Circuit for GaN Transistors

  Publikacja

  • P. Derkacz
  • P. Musznicki

  - Przegląd Elektrotechniczny - Rok 2019

  The improvement of the gate driver for GaN transistor is presented in this paper. The proposed topology contains the overcurrent protectionwith the two-stage turning off and independent control of turn on and off time of the GaN transistor. The operation of driver and its application in thehalf-bridge converter are described using both simulation and prototype measurements. The overcurrent protection was tested in Double Pulse...

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• Design and implementation of the driver system for Hamamatsu C12880MA microspectrometer

  Publikacja

  • P. Sokołowski
  • M. Wróbel
  • K. Karpienko

  - Photonics Letters of Poland - Rok 2021

  Recent miniaturization developments in devices for spectroscopy have reduced greatly their costs and increased their availability for a wide range of users and applications. This paper presents the design and implementation of a driver system for a Hamamatsu C12880MA microspectrometer. The system implementation was carried out and compared using two independent microcontroller modules: Arduino Uno and STM32F411RE Nucleo. We assessed...

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• Driver Fatigue and Road Safety on Poland's National Roads

  Publikacja

  • K. Jamroz
  • L. Smolarek

  - International Journal of Occupational Safety and Ergonomics - Rok 2013

  This paper presents an overview of factors causing driver fatigue as described in the literature. Next, a traffic crash database for 2003–2007 is used to identify the causes, circumstances and consequences of accidents caused by driver fatigue on Poland’s national roads. The results of the study were used to build a model showing the relationship between the concentration of road accidents and casualties, and the time of day. Finally,...

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• Autonomous Driver Based on an Intelligent System of Decision-Making

  Publikacja

  • M. Czubenko
  • Z. Kowalczuk
  • A. Ordys

  - Cognitive Computation - Rok 2015

  The paper presents and discusses a system (xDriver) which uses an Intelligent System of Decision-making (ISD) for the task of car driving. The principal subject is the implementation, simulation and testing of the ISD system described earlier in our publications for the task of autonomous driving. The design of the whole ISD system is a result of a thorough modelling of human psychology based on an extensive literature study. Concepts...

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• Driver Fatigue and Road Safety on Poland’s National Roads

  Publikacja

  • K. Jamroz
  • L. Smolarek

  - International Journal of Occupational Safety and Ergonomics - Rok 2013

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• Assessment of the effect of vegetation on the transition of the flood wave using hydraulic 2D models

  Publikacja

  • K. Wolski
  • T. Tyminski
  • P. Dabek

  - E3S Web of Conferences - Rok 2018

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• Power balance in hydraulic satellite motors supplied with oil and HFA-E emulsion

  Publikacja

  • P. Śliwiński

  - Rok 2008

  Mineral oil and HFA-E emulsion are liquids which differ in viscosity, density and lubricant properties. Therefore, supplying hydraulic satellite motors with these liquids, differences between quantity of hydraulic, volumetric and mechanical losses are observed. These losses influence efficiency of conversion of hydraulic energy into mechanical energy and thereby power balance of motors.

• Wear forms of heterogeneous electro-rheological fluids working in a hydraulic clutch system

  Publikacja

  • E. Ziabska
  • J. Duchowski
  • A. Olszak
  • K. Osowski
  • A. Kesy
  • Z. Kesy
  • S. Choi

  - SMART MATERIALS & STRUCTURES - Rok 2017

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• Failure analysis and modernization of high-pressure hydraulic press for drilling tubes testing

  Publikacja

  • P. Krot
  • R. Zimroz

  - Engineering Failure Analysis - Rok 2020

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• Dynamics control of powered hydraulic roof supports in the underground longwall mining complex

  Publikacja

  • P. Rudzki
  • P. Krot

  - IOP Conference Series: Earth and Environmental Science - Rok 2021

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• Influence of operating pressure on the durability of a satellite hydraulic motor supplied by rapeseed oil

  Publikacja

  • P. Śliwiński

  - Scientific Reports - Rok 2024

  This article describes the results of a durability test of a hydraulic satellite motor supplied by rapeseed oil. The tests were carried out on a test stand in a power recuperation system. The tests of the motor were carried out at a constant shaft speed for three fixed pressure drops in the motor. This made it possible to demonstrate the influence of the motor operating pressure on the durability of the satellite mechanism. The...

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• Influence of Properties of Hydraulic Fluid on Pressure Peaks in Axial Piston Pumps’ Chambers

  Publikacja

  • P. Patrosz

  - ENERGIES - Rok 2021

  The article concentrates on the research of the pressure peaks in a working chamber of an axial piston pump. The main focus of the article is the influence of fluid properties on the pressure peaks value. Experimental and analytical methods were used to determine the impact of the fluid density, viscosity, compressibility and aeration. The article describes the pressure peak generation process and explains the theoretical basis...

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• Microseismic Monitoring of Hydraulic Fracturing - Data Interpretation Methodology With an Example from Pomerania

  Publikacja

  • M. Antoszkiewicz
  • M. Kmieć
  • P. Szewczuk
  • R. Jankowski
  • M. Szkodo

  - Rok 2017

  Microseismic monitoring is a method for localizing fractures induced by hydraulic fracturing in search for shell gas. The data is collected from an array of geophones deployed on the surface or underground. Ground vibrations are recorded and analysed for fracture location, magnitude and breakage mechanism. For successful microseismic monitoring one need a velocity model of underlying formations. The model is further tuned with...

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• Possible application of new class of solvents in the purification of water used in hydraulic fracturing

  Publikacja

  • Z. Lustig

  - Rok 2012

  Nowym źródłem energii niekonwencjonalnej w Polsce może być gaz, który jest uwięziony w łupkach. Podczas poszukiwań gazu łupkowego, duże ilości wody wykorzystywanej w procesie szczelinowania hydraulicznego powracają na powierzchnię zanieczyszczone. Istnieje wiele metod usuwania śladowych ilości węglowodorów tj. fizyczne czyli filtracja czy chemiczne czyli zakwaszanie, ale mogą one być nieskuteczne. Pożądana metoda to monitorowanie...