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Search results for: front wodny
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Technologia Wody
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Gospodarka Wodna
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Piotr Stachowski dr hab.inż.
PeopleKierunki badań 1. Nawadnianie użytków rolnych, terenów rekreacyjnych i sportowych. 2. Gospodarka wodna terenów zdewastowanych i zdegradowanych. 3. Wykorzystanie systemów i urzadzeń melioracyjnych w kształtowaniu zasobów wodnych. 4. Prośrodowiskowe zagospodarowanie wód opadowych. słowa klucze 1.nawodnienia 2.niedobory wody,zasoby wodne, 3.grunt pogórniczy
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Fronty wodne jako współczesny kierunek przekształceń przestrzennych w polskich portach morskich
PublicationPolskie porty morskie przechodzą dynamiczny okres przemian swoich struktur organizacyjnych i przestrzennych. Rozpad wielkich, scentralizowanych państwowych organizmów portowych na wiele niezależnych przedsiębiorstw i instytucji, realizujących swoje różnorodne cele spowodował, że zaczęła się również różnicować przestrzeń portowa, ujawniając zarówno swoje braki (niedostatki w wyposażeniu w infrastrukturę, niski standard zagospodarowania,...
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UPS na pierwszej linii frontu. - Tł. z Plant Engineering, February 2007. - Tyt. oryg.: UPS on the front line / Scott Siddens
PublicationOpisano możliwości techniczne nowoczesnych rozwišzań systemów zasilania bezprzerwowego UPS.
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Testo a fronte
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Front Matter: Volume 8703
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Front Matter: Volume 7502
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Front Matter: Volume 8454
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Front Matter: Volume 8010
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Front Matter: Volume 8702
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Front Matter for Volume 7745
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Front Matter: Volume 9290
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Front Matter: Volume 8008
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On the crack front curvature in bonded joints
PublicationStandard tests of adhesively bonded specimens are likely to produce heterogeneous stress distribution along the crack front and its vicinity. High separation rate mode I dominated fracture test is performed.Observation of post mortem fractured surfaces with an optical microscope reveals characteristic features of mixed mode I/III fracture near the sides of the specimen but not in the middle. At first, finite elements calculations...
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Zieleń wodna i terenów zalewowych w parku Wodnym w Poznaniu
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Energetyka Wodna
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Development of low noise CCD readout front-end
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Development of low noise CCD readout front-end
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BeesyCluster as Front-End for High Performance Computing Services
PublicationThe paper presents the BeesyCluster system as a middleware allowing invocation of services on high performance computing resources within the NIWA Centre of Competence project. Access is possible through both WWW and SOAP Web Service interfaces. The former allows non-experienced users to invoke both simple and complex services exposed through easyto-use servlets. The latter is meant for integration of external applications with...
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Zachodni front śródmieścia Gdańska. Studium urbanistyczno-konserwatorskie
PublicationZachodni front śródmieścia Gdańska to kluczowy fragment urbanistycznego założenia pierścieniowego, które powstało na przełomie XIX i XX wieku w czasie wielkiej przebudowy miasta. Wtedy to w miejscu nowożytnych bastionów ziemnych, które przez ponad trzy stulecia wyznaczały granicę miasta, zostały wytyczone nowe ulice i place. W ich otoczeniu powstała nowa wielkomiejska zabudowa. W 1945 roku Gdańsk został zniszczony, a po wojnie...
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Trendy w gospodarce wodno-ściekowej w zakresie zaawansowanego odzysku wody ze ścieków
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Zeszyty Naukowe Politechniki Gdańskiej. Inżynieria Lądowa i Wodna
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Western Front of the City Centre of Gdańsk. An Urban Conservation Study
PublicationThe western front of Gdańsk`s city centre is the key fragment of a ring road scheme, which was created at the turn of the 20th century during the great transformation of the city. It was at that time that new streets and squares were delineated on the site of the early modern earthen bastions, which for more than three centuries marked Gdańsk`s border. The new city development was set up in their surroundings. In 1945, Gdańsk was...
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CLEANING METHODS FOR DUST DEPOSITED ON THE FRONT COVER OF PHOTOVOLTAIC MODULE
PublicationPhotovoltaic modules are one of the renewable energy sources with great potential for application in various regions of the world as well as for different terrain. They are, however, sensitive to external factors, affecting the overall amount of energy generated, such as solar irradiance, shading effects and any form of soil build-up on the front glass cover of solar device. The latter issue happens over a course of weeks, months...
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Scour development in front of coastal structures at intermediate phases of construction
PublicationPublikacja poświęcona jest zagrożeniom budowli morskich spowodowanych powstawaniem form erozyjnych na dnie morskim w sąsiedztwie konstrukcji. Pomiary i obserwacje wykonane w warunkch naturalnych porównane zostały z istniejącymi zaleceniami i wytycznymi do projektowania. Przedstawiono sytuacje, w których zagrożenie rzeczywiste osiągnęło poziom wyższy od zakładanego w fazie projektowej. Przedstawiono również przypuszczalne mechanizmy...
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PRZEKSZTAŁCENIA FRONTU WODNEGO GDAŃSKA
PublicationW ramach publikacji przedstawiono główne tendencje współczesnych przemian frontu wodnego Gdańska. W szczególności omówiono zagadnienia zagospdoarowania obszarów zdegradowanych - poportowych i poprzemysłowych.
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Volunteering in the front line of the Ukrainian refugee crisis. A brief report from Poland
PublicationThis study aims to analyse the experiences and motivations of volunteers who supported Ukrainian refugees who fled to Poland. Our study was conducted among 196 volunteers in Poznan, Poland who answered questions regarding their experiences with voluntary service during the current refugee crisis and the reasons they became involved in volunteer efforts.We found that although the Polish state had no prior experience in welcoming...
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Volunteering in the front line of the Ukrainian refugee crisis: A brief report from Poland
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Optical properties of a dielectric slab front-loaded with a grating of plasmonic silver nanowires
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Studies of kicking of three targets – does sex differentiate the velocity of the taekwondo front kick?
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Biomechanics of the front abdominal wall as a potential factorleading to recurrence with laparoscopic ventral hernia repair
PublicationThis study investigated the front abdominal wallto describe its elasticity in vivo and searched for elongationsthat possibly stretched an implanted mesh, therebycausing fixation failure and subsequent recurrence.To measure front abdominal wall elongations, amodel of fascia movements was created. Eight healthyvolunteers were measured during exercise to determine theextent of elongations in their front abdominal wall. Videoswere...
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Rapid multi-objective design optimization of miniaturized impedance transformer by Pareto front exploration
PublicationFast multi-objective optimization of compact impedance transformer is discussed. A set of alternative designs representing possible trade-offs between conflicting design criteria, i.e., electrical performance (here, wideband matching) and the structure size, is obtained through Pareto front exploration by means of surrogate-assisted methods.
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Modelling of FloodWave Propagation with Wet-dry Front by One-dimensional Diffusive Wave Equation
PublicationA full dynamic model in the form of the shallow water equations (SWE) is often useful for reproducing the unsteady flow in open channels, as well as over a floodplain. However, most of the numerical algorithms applied to the solution of the SWE fail when flood wave propagation over an initially dry area is simulated. The main problems are related to the very small or negative values of water depths occurring in the vicinity of...
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Elementy rewitalizacji frontu wodnego w Jokohamie.
PublicationArtykuł omawia proces rewitalizacji starej tkanki obszarów portowych w Jokohamie w tym zbytecznych z punktu widzenia nowoczesnej technologii przeładunków starych magazynów.
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SPORTY WODNE I RATOWNICTWO
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Acute Effects of Supra- and High-Loaded Front Squats on Mechanical Properties of Lower-Limb Muscles
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Constrained multi-objective optimization of compact microwave circuits by design triangulation and pareto front interpolation
PublicationDevelopment of microwave components is an inherently multi-objective task. This is especially pertinent to the design closure stage, i.e., final adjustment of geometry and/or material parameters carried out to improve the electrical performance of the system. The design goals are often conflicting so that the improvement of one normally leads to a degradation of others. Compact microwave passives constitute a representative case:...
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Influence of span length and impulse front time on earthing measurement accuracy of power line towers
PublicationThe article discusses the issue of measuring and assessing the features of power line tower earthings using fast-changing waveform. The study analyses the effect of impulse front time and the line span length on errors made during these measurements using impulse meters. It has been found that the assessment conditions similar to the static measurement results occur for the use of 4 μs current impulses and such procedure is useful...
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Low-cost multi-objective optimization of antennas using Pareto front exploration and response features
PublicationIn the paper, a procedure for low-cost multi-objective optimization of antenna structures is presented. Our approach is based on exploration of the Pareto front representing the best possible trade-offs between conflicting objectives, here, the structure size and its electrical performance. Starting from the design representing the best in-band reflection level, subsequent Pareto-optimal designs are identified through local constrained...
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Rapid Multi-Criterial Antenna Optimization by Means of Pareto Front Triangulation and Interpolative Design Predictors
PublicationModern antenna systems are designed to meet stringent performance requirements pertinent to both their electrical and field properties. The objectives typically stay in conflict with each other. As the simultaneous improvement of all performance parameters is rarely possible, compromise solutions have to be sought. The most comprehensive information about available design trade-offs can be obtained through multi-objective optimization...
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On Fast Multi-objective Optimization of Antenna Structures Using Pareto Front Triangulation and Inverse Surrogates
PublicationDesign of contemporary antenna systems is a challenging endeavor, where conceptual developments and initial parametric studies, interleaved with topology evolution, are followed by a meticulous adjustment of the structure dimensions. The latter is necessary to boost the antenna performance as much as possible, and often requires handling several and often conflicting objectives, pertinent to both electrical and field properties...
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The Effect of Water and Frost on Fatigue Life of Asphalt Concrete
PublicationThis paper presents testing of fatigue life of asphalt concrete that has been subjected to action of water and frost. Simulation of water and frost action was based on the original AASHTO T283 method and its modification. The original method was modified in such a way that instead of a single freeze-thaw cycle, 50 and 150 cycles were applied. Fatigue life was measured in the indirect tensile fatigue test in the Nottingham asphalt...
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Szybki pojazd wodny napedzany siłą mięśni ludzkich
PublicationNa tle tak mocno technologicznego świata wciąż odżywają idee urządzeń czerpiących energię ze źródeł naturalnych: a to samoloty napędzane energią słoneczną, a to pojazdy kołowe napędzane siłą wiatru. Jednym z takich wyzwań jest konstrukcja szybkiego pojazdu wodnego napędzanego siłą mięśni załogi i udział w regatach takich pojazdów - International Waterbike Regatta (IWR) zwanych potocznie Waterbike.
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Rapid multi-objective design of integrated on-chip inductors by means of Pareto front exploration and design extrapolation
PublicationIdentification of the best trade-offs between conflicting design objectives allows for making educated design decisions as well as assessing suitability of a given component or circuit for a specific application. In case of inductors, the typical objectives include maximization of the quality factor and minimization of the layout area, as well as maintaining a required inductance at a given operating frequency. This work demonstrates...
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Pływająca elektrownia wodna
PublicationPodano wybrane elementy teorii oraz założeń projektowych elektrowni wodnej zlokalizowanej na zakotwiczonej barce na rzece. Obliczenia podano na przykładzie konkretnej lokalizacji. Podano warianty wyposażenia elektrowni oraz sposobu przyłączenia takiej elektrowni do systemu elektroenergetycznego lub odbioru indywidualnego.
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Dyrektywa wodna a rolnictwo.
PublicationW artykule poruszono zakres zagadnień podanych w dyrektywie wodnej UE.Omówiono związek pomiędzy rolnictwem a jakością i ilością wody. Podano zagadnienia zrównoważonego rozwoju rolnictwa i polityki rolnej UE. Omówiono zagadnienia rolnictwa i wody w Europie Centralnej i Wschodniej oraz podano wnioski dotyczące tej tematyki.
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6. Energetyka wodna
PublicationPrzedstawiono rys historyczny, rozwiązania techniczne i walory turystyczne elektrowni wodnych na Raduni.
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Mierzenie wody
PublicationProblemy konsekwencji przewymiarowania wodomierza skrzydełkowego.
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Verification of the criteria for evaluation of water and frost resistance of asphalt concrete
PublicationThe paper presents the results of field investigation - condition survey of existing pavements and the results of laboratory tests on water and frost resistance of samples cored from the these pavements. The purpose of testing was to verify the criteria for evaluation of the resistance of asphalt concrete to the action of water and frost by way of comparing the results of field and laboratory tests, followed by evaluation of their...