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Wyniki wyszukiwania dla: RIVER HYDRAULICS
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Wpływ przepływów pożarowych na jakość wody
PublikacjaHydraulika sieci o niewielkich przepływach. Zaburzenia przy przepływie pożarowym. Stagnacja wody w sieci, zagniwanie. Poszukiwanie akceptowalnych rozwiązań. Propozycje rozwiązania problemu.
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Occurrence of antimicrobial resistant bacteria in environment and the statistical analysis of this phenomenon
PublikacjaIntroduction: In this study the occurrence of antimicrobial resistance patterns among fecal indicators (Escherichia coli and Enterococcus spp.) was analyzed in water and wastewater samples. The trends in antimicrobial resistance were analyzed using basic statistical methods. Methods: Samples were obtained from two local watercourses (Oliwski Stream and Reda River) as well as from the wastewater treatment plant (WWTP) Gdansk - Wschod....
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Determining the Seasonal Variability of the Territorial Sea Baseline in Poland (2018–2020) Using Integrated USV/GNSS/SBES Measurements
PublikacjaThe Territorial Sea Baseline (TSB) allows coastal states to define the maritime boundaries, such as: contiguous zone, continental shelf, exclusive economic zone and territorial sea. Their delimitations determine what rights (jurisdiction and sovereignty) a given coastal state is entitled to. For many years, the problem of delimiting baseline was considered in two aspects: legal (lack of clear-cut regulations and different interpretations)...
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MATCHED FILTER APPROACH FOR MICROSEISMIC SIGNAL PROCESSING OF REAL DATA FROM EAST POMERANIA SHALE GAS
PublikacjaThe microseismic monitoring is a method of monitoring of fracture propagation during hydraulic fracturing (HF)process. An array of several hundred geophones is placed on the surface to record little ground tremors induced by fracturing process. Filtration and summation of signals from geophones is essential to identify and locate fracturing events from underground. Authors propose a method of matched filtering, that is usually...
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Examples of numerical simulations of two-dimensional unsaturated flow with VS2DI code using different interblock conductivity averaging schemes
PublikacjaFlow in unsaturated porous media is commonly described by the Richards equation. This equation is strongly nonlinear due to interrelationships between water pressure head (negative in unsaturated conditions), water content and hydraulic conductivity. The accuracy of numerical solution of the Richards equation often depends on the method used to estimate average hydraulic conductivity between neighboring nodes or cells of the numerical...
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Jakość wód Potoku Oliwskiego i rzeki Redy oraz ich wpływ na przybrzeżne kąpieliska w aspekcie nowych przepisów prawnych.
PublikacjaCharakterystyka rejonów Potoku Oliwskiego i rzeki Reda. Potencjalne źródła zanieczyszczeń badanych obszarów. Aspekty prawne dotyczące oceny jakości wód powierzchniowych i wody w morskich kąpieliskach przybrzeżnych. Badania fizykochemiczne i zanieczyszczenia mikrobiologiczne analizowanych cieków oraz ich wpływ na wody przybrzeżne.
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Zanikanie. Cmentarze menonickie w przestrzeni kulturowej Żuław
PublikacjaCmentarze menonickie są jednym z elementów wielonarodowej mozaiki kulturowej, jaką można odnaleźć na Żuławach Wiślanych. Obecne są w krajobrazie od ponad dwustu pięćdziesięciu lat.Celem publikacji jest przedstawienie współczesnej historii menonickich cmentarzy i obiektów sakralnych. Oparte zostało na badaniach terenowych nekropolii i lapidariów Delty Wisły w Cyganku-Żelichowie, Fiszewie, Jezierniku, Niedźwiedziówce, Pordenowie,...
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Fatigue data of Cement Bitumen Treated Material Mixture C3E5.5 (over 28 days of curing at 20C)
Dane BadawczeFatigue data of Cement Bitumen Treated Material Mixture C3E5.5 (over 28 days of curing at 20C)
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Fatigue data of Cement Bitumen Treated Material Mixture C3E5.5 (over 28 days of curing at 20C, field cores)
Dane BadawczeDataset presents data of fatigue life determined for cold recycled mixture – cement bitumen treated material mixture with following binding agents: 3% cement and 5.5% emulsion (C3E5.5). Mixture was designed according to Polish requirements for the base course of pavement. Mixture contains 60% of RAP material. Specimen size: f=100 mm, h=48,4 - 70,9 mm.
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Szczególne problemy projektowania kanalizacji (I)
PublikacjaKonieczność zmian sposobu podejścia do projektowania infrastruktury wodno - kanalizacyjnej. Problemy hydrauliki. Nowe zasady planowania zagospodarowania przestrzennego. Miejsce w fazach planowania. Problemy ilościowe.
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Szczególne problemy projektowania kanalizacji (II)
PublikacjaProblem minimalnego spadku (hydraulika przewodu przy małych napełnieniach). Konsekwencjqa, samooczyszczenie, wywołanie fali czyszczącej. Spływ wód opadowych. Bezpieczny poziom eksploatacyjny. Ogólne zalecenia, alternatywy.
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Hydrodynamic Pressure Field of a Ship on Shallow Water
PublikacjaResults of calculations of the hydrodynamic pressure field around the ship were obtained by application of the boundary element method. Hydrodynamic field was calculated for a Polish Navy’s tugboat and transport ship using a program called SHiPP and compared with measurements of the field taken on river near Swinoujscie for two identical tugs H-4 and H-10. Next, a series of HPF calculations was carried out on planes situated at...
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Reference FEM model for SHM system of cable-stayed bridge in Rzeszów
PublikacjaThe paper presents the references model for structural health monitoring system (SHM) of cable-stayed bridge recently constructed in Rzeszów over Wisłok River. The SHM system is design to provide on-line information on the structure state and facilitate its maintenance procedures. The main feature of the SHM system is permanent observation of the dynamic behavior of the bridge with focus on cable vibrations. The paper discusses...
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Hydrauliczna wiarygodność wyników pomiarów terenowych stosowanych do identyfikacji oporności hydraulicznej przewymiarowanych sieci wodociągowych
PublikacjaPublikacja zawiera zalecenia metodyczne dotyczące identyfikacji oporności hydraulicznej w przewymiarowanych sieciach wodociągowych na tle spotykanych nieprawidłowości. Krytycznie oceniono wyniki pomiarów terenowych, które zastosowano do tarowania komputerowych modeli przepływów (KMP) pomimo, że nie spełniały kryterium hydraulicznej wiarygodności. Ponadto zaproponowano spadek hydrauliczny jako obiektywny wskaźnik wiarygodności pomiarów,...
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Hydrauliczny opis przepływu cieczy w systemach kubaturowych
PublikacjaUsystematyzowano problemy, podejmowane w ramach hydrauliki systemów inzynierii sanitarnej. Omówiono podstawowe wskaźniki funkcjonowania obiektów kubaturowych oraz możliwości ich wyznaczania - metodami dokładnymi i uproszczonymi.
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O kanalizacyjnej studzience rewizyjnej
PublikacjaZagadnienia stosowania kanalizacyjnej studzienki rewizyjnej. Hydraulika współczesnej sieci kanalizacyjnej. Warunek samooczyszczania. Problem wyboru studzienki. Średnica, kineta. Warunki eksploatacji, stabilność konstrukcji w podłożu gruntowym.
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Anna Gumuła-Kawęcka dr inż.
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Hydraulika pojazdów, W, MiBM, sem.06, letni 21/22 (M:31944W0)
Kursy OnlineKurs zawiera materiały do wykładu z przedmiotu Hydraulika Pojazdów
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Simulation of Residence Time Distribution and Mixing in Reactors with Recirculation Using 2D Approach
PublikacjaIn this paper, we propose a 2D approach in order to create a mathematical model for the determination of the residence time distribution for a flow reactor with recirculation. Apart from characterizing the functional residence time distribution, this model can help improve the operation of the reactor at the design stage. The mathematical model was validated by comparison with experiments carried out in a hydraulic laboratory.
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Low cost set-up for supercapacitors parameters evaluation
PublikacjaWe propose a use of a power amplifier in the circuit of voltage to current converter (current driver) for supercapacitor charging/discharging in controlled conditions. The current driver is controlled by DAC output of DAQ board and voltage of DUT is measured and a control loop is realized by software. In the circuit the DC current method of evaluation of capacitance and equivalent series...
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MICROSEISMIC EVENT DETECTION USING DIFFERENT ALGORITHMS ON REAL DATA FROM PATCH ARRAY GEOPHONE GRID FROM EASTERN POMERANIA FRACTURING JOB
PublikacjaThe microseismic monitoring is a method of monitoring of fracture propagation during hydraulic fracturing process. Hydraulic fracturing is a method of reservoir stimulation used especially for unconventional gas recovery. A matrix of several thousand geophones is placed on the surface of earth to record every little tremor of ground induced by fracturing process. Afterwards, the signal is analysed and the place of tremor occurrence...
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DISTRIBUTION OF FLOWS IN A CHANNEL NETWORK UNDER STEADY FLOW CONDITIONS
PublikacjaThe article presents an algorithm for calculating the distribution of flow in a junction of open channel network under steady flow conditions. The article presents a simplified calculation algorithm used to estimate the distribution of flow in a network of channels under steady flow conditions. The presented algorithm is based on the continuity equation and a simplified energy equation. To describe the relationship between the...
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Simulations of hydro-fracking in rock mass at meso-scale using fully coupled DEM/CFD approach
PublikacjaThe paper deals with two-dimensional (2D) numerical modelling of hydro-fracking (hydraulic fracturing) in rocks at the meso-scale. A numerical model was developed to characterize the properties of fluid-driven fractures in rocks by combining the discrete element method (DEM) with computational fluid dynamics (CFD). The mechanical behaviour of the rock matrix was simulated with DEM and the behaviour of the fracturing fluid flow...
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Relationships between concentrations of selected organohalogen contaminants and thyroid hormones and vitamins A, E and D in Faroese pilot whales
PublikacjaPilot whales (Globicephala melas) from the Faroe Islands, North-East Atlantic, have high body concentrations of organohalogenated compounds (OHCs), such as polychlorinated biphenyls (PCBs), organochlorinated pesticides (OCPs) and brominated flame retardants (BFRs). The aim of the present study was to examine if and to what extent blood plasma and liver concentrations of several groups of these OHCs are related to concentrations...
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Pedestrian Safety in Road Traffic in Poland
PublikacjaEvery third road accident in Poland involves a pedestrian as a participant or, most of the time, a casualty. Pedestrian accidents are usually the result of complex situations and the outcome of a number of factors related to driver and pedestrian behaviour and road infrastructure. Safety depends largely on how well the traffic condition is perceived and on visibility in traffic. The paper presents the results of analyses of methodologies...
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Hydraulika i Pneumatyka, W, M, sem.04, letni 22/23
Kursy OnlineKurs zawiera materiały do wykładu z przedmiotu Hydraulika i Pneumatyka
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Hydraulika 2022/2023
Kursy OnlineHydraulika (W+Ć) prowadzony na semestrze III dla studentów IŚ
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Influence of Toll Collection Method on Motorways on Traffic Safety and Efficiency
PublikacjaThe paper presents the results of the effectiveness analysis for various forms of toll collection on motorway gates and their impact on safety and efficiency of traffic. The results from field tests that were performed on the A1 motorway in Rusocin were used for the analysis. The research included the analysis of the video image of driver behaviour on the way to the toll booths and at toll booths. The PTV VISSIM tool was used to...
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Maria Przewłócka dr inż.
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NEW EXPERIENCES IN DIKE CONSTRUCTION WITH SOIL-ASH COMPOSITESAND FINE-GRAINED DREDGED MATERIALS
PublikacjaThe supporting structure inside a coastal dike is often made of dredged non-uniform sand with good compaction proper-ties. Due to the shortage of natural construction material for both coastal and river dikes and the surplus of different processed mate-rials, new experiments were made with sand-ash mixtures and fine-grained dredged materials to replace both dike core and dikecover materials resulting in economical, environmentally...
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Assessment of Sewage Molecular Markers: Linear Alkylbenzenes in Sediments of an Industrialized Region in Peninsular Malaysia
PublikacjaIn this study, the use of linear alkylbenzenes (LABs) was employed to pinpoint the sources of human activity that cause detrimental impacts on the coastal environment and river ecosystems. LABs were detected using GC–MS in sediment samples assembled from Kim Kim River (KKR) and the Port Dickson coast (PDC). To assess the significance of variations in the distribution and concentrations of LABs across the sampling sites, this study...
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Integrated production technology of cylindrical surfaces by turning and burnishing
PublikacjaThe method is based on a combination of previously used two separate operations namely machining and burnishing in a one complex operation implemented on a lathe.In the case of machining shafts and hydraulic cylinders of steel C45 is possible to obtain a surface roughness Ra=0,16 - 0,32 micrometers, dimensional accuracy class 7-8 according to ISO standards, and increase in the hardness of the surface up to 40%.
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Hydraulika siłowa urządzeń okrętowych (PG_00056306) - WYKŁAD - OCE, SiUO, sem 4, rok akademicki 2023/2024, lato
Kursy OnlineHydraulika siłowa urządzeń okrętowych (PG_00056306) - WYKŁADdla OCE, SiUO, sem4
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Die neue Straßenbrücke in Toruń (Thorn) – Teil 2 – Nachweise
PublikacjaAls Fortsetzung von Teil 1, der über den Entwurf und den Bau der neuen, die Weichsel querenden Straßenbrücken in Toruń (deutsch: Thorn) berichtet, geht es im Folgenden um die theoretischen und experimentalen Nachweisen zum Montageprozess und zu Probebelastungen. Somit eine umfassende Beurteilung der beschriebenen , herausragenden Ingenieursleistung gegeben.
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Ocena zdatności hydraulicznych pomp i silników uruchamianych w niskich temperaturach otoczenia
PublikacjaW referacie przedstawiono metody pozwalające określić parametry prawidłowego rozruchu zespołów oraz układów hydraulicznych w niskich temperaturach otoczenia. Badania eksperymentalne wykonano w laboratorium Katedry Hydrauliki i Pneumatyki Politechniki Gdańskiej.
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Rewitalizacja jako zintegrowany proces budowania potencjałów wewnątrz miejskich obszarów rozwojowych na przykładzie hamburskiej strategii Skoku przez Łabę
PublikacjaPolityka Hamburga w ramach strategii Skok przez Łabę jest przykładem aktualnego kierunku odnowy miasta wychodzącej poza klasyczną rewitalizację. Poprawa jakości, udoskonalenie struktur miejskich, wymaga w obszarach problemowych niekonwencjonalnego podejścia zarówno w fazie wyznaczania docelowych standardów, jak i na etapie wdrażania rozwiązań. Dzielnice w widłach rzeki Łaby, lewobrzeżne strefy poportowe Hamburga, objęte zostały...
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Hydrological indicators of water zones in inundation, historical water levels, and forcing data for the 1881-2099 period in the lower Biebrza valley
Dane BadawczeThis data set contains hydrological (1) indicators of water source extents in the Biebrza River floodplain (NE Poland) simulated using an integrated hydrological model (IHM), (2) forcing data for the IHM, and (3) water levels in the Osowiec station from the period 1881-1910.
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Infiltration in a double-porosity medium: Experiments and comparison with a theoretical model
PublikacjaThis paper presents experimental verification of the mathematical model of unsaturated flow in double‐porosity soils developed by the asymptotic homogenization method. A series of one‐dimensional infiltration experiments was carried out in a column filled with a double‐porosity medium composed of a mixture of sand and sintered clayey spheres arranged in a periodic manner. The unsaturated hydraulic properties of each porous material...
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NEW DESIGNS OF MAGNETIC FLUID SEALS FOR RECIPROCATING MOTION
PublikacjaT he operating conditions of magnetic fluid seals during reciprocating motion are so different from those observed in rotating motion that the use of their conventional structures for reciprocating motion seals yields no good results. The analysis of the sealing mechanism of magnetic fluid seals in reciprocating motion shows that the operation of these seals is affected by the carry-over phenomenon and magnetic fluid...
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Leszek Osiecki dr hab. inż.
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Theoretical analysis of heat transfer between a liquid layer formed by an impinginf gas liquid jet AND a solid surface
PublikacjaHeat transfer phenomenon between a horizontal solid surface and a liquid layer created on a surface by an axisymmetrical liquid gas impinging jet has been analysed. The analytical treatment of the phenomenon is devoted to the area whose diameter is lower than the diameter of the hydraulic jump. W pracy przedstawiono teoretyczną analizę wymiany ciepła pomiędzy warstwą cieczy a stałą powierzchnią po której przepływa.
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Free-surface elevation in open vortex flow controls
PublikacjaRotational form of fluid motion is complex, but very important in science and technology. The paper is devoted to the hydraulic mechanism of flow in open vortex flow controls, or regulators. The velocity field was described by the kinematic model, and intensity of rotation - by means of the energy balance between the input and dissipation. In consequence some algebraic expresions were obtained, which can be useful in approximated...
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Flood risk assessment for office and services building Alchemia II at Al. Grunwaldzka 409 in Gdansk.
PublikacjaThe aim of the study is to assess the risk of flood from natural meteorological and hy-drological phenomena, for office and services building Alchemia II in Gdansk at Al. Grun-waldzka 409. The project includes the analysis of potential sources of floods in Gdansk re-garding the Baltic Sea and the Gulf of Gdansk, the Vistula River basin and excessive rainfall and snowmelt waters being a significant element of hydrological processes...
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The state of the art in the field of decrease the pollution in the South Baltic area
PublikacjaVarious form of human activity such as maritime transports, industrial activities, busy traffic, intensive farming and animal husbandry can have negative impact on natural marine environment. Baltic Sea catchment area is characterized by the high river water flux and wastewater treatment plants discharges. Additionally, the limited shallow connection to the North Sea results in little water exchange and residence time of approximately...
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Hydraulika siłowa urządzeń okrętowych (PG_00056306) - LABORATORIUM - OCE, SiUO, sem 4, rok akademicki 2023/2024, lato
Kursy OnlineHydraulika siłowa urządzeń okrętowych (PG_00056306) - LABORATORIUMdla OCE, SiUO, sem 4
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Nutrient loss from three small-size watersheds in the southern Baltic Sea in relation to agricultural practices and policy
PublikacjaAgriculture is the major contributor of waterborne nutrient fluxes into the Baltic Sea, one of the world’s most eutrophication-sensitive areas. Poland, as a large, densely populated state ohf the Baltic Region, with dominating agricultural land use, largely contributes to riverborne loads of N and P. The aim of our study was to examine the input of nutrients from three small first-order agricultural watersheds (Bladzikowski Stream,...
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Destruction of shell structures under the dynamic load on the human skull trauma basis
PublikacjaThe main aim of this work is to investigate patterns of potential orbital bone fractures due to mechanical injuries. The solution of the main problem is followed by analysis of several testing examples having straight correlation with civil engineering structures, in which materials of wide range of stiffness are applied. To solve the main problem, the three-dimensional finite element method (FEM) model of the orbital region has...
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Splice variants of mitofusin 2 shape the endoplasmic reticulum and tether it to mitochondria
PublikacjaIn eukaryotic cells, different organelles interact at membrane contact sites stabilized by tethers. Mitochondrial mitofusin 2 (MFN2) acts as a membrane tether that interacts with an unknown partner on the endoplasmic reticulum (ER). In this work, we identified the MFN2 splice variant ERMIT2 as the ER tethering partner of MFN2. Splicing of MFN2 produced ERMIT2 and ERMIN2, two ER-specific variants. ERMIN2 regulated ER morphology,...
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Hydraulika i Pneumatyka
Kursy Onlinea
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Hydraulika i Pneumatyka
Kursy OnlineNa wykładzie omawiane są podstawy teoretyczne napędu hydraulicznego i pneumatycznego, proste układy spotykane w praktyce oraz elementy wchodzące w skład tych układów. Przedstawione są także przykłady zastosowań obu rodzajów napędu w budowie maszyn oraz ich wady i zalety w porównaniu z innymi rodzajami napędu.