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Search results for: ZOSTERA MARINA
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Kult obrazów według Reformatorów: Marcina Lutra i Jana Kalwina
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Implementing Simulationx in the Modelling of Marine Shafting Steady State Torsional Vibrations
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Distribution of the International Marine Traffic Air Pollutant Emissions in the Port of Split
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Analytical methods and problems related to the determination of organotin compounds in marine sediments
PublicationProcedury analityczne oznaczania zwiazków cynoorganicznych w osadach morskich skladają się z wilu operacji i czynnosci (pobieranie próbek, wstępne przygotowanie, transport, oznaczenia końcowe). Zazwyczaj procedury te charakteryzują się dużą praco- i czasochłonnością. W pracy omówiono podstawowe źródła błędów zwiazane z w/wym etapami postepowania analitycznego oraz przedstawiono sposoby im zapobiegania.
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Thermohydraulic and thermoeconomic performance of a marine heat exchanger on a naval surface ship
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Mercury concentrations in marine biota with special focus on grey and ringed seals
PublicationMarine organisms are exposed and sensitive to effects of environmental contamination by heavy metals including different forms of mercury. Baltic seals as the top predators of the marine ecosystem are even more endangered due to (considerable) longevity as well as a long biological half-time of toxin elimination. The concentrations of mercury in seals from the Baltic is poorly known, thus the aim of this work is to determine and...
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Multisensor Tracking of Marine Targets - Decentralized Fusion of Kalman and Neural Filters
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Calcite Nanotuned Chitinous Skeletons of Giant Ianthella basta Marine Demosponge
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Speciation of heavy metal compounds in samples of biota from marine ecosystems
PublicationIt has become increasingly evident that the toxicity, mobility, bioavailability and bioaccumulation of metals are dependent on the particular physico-chemical form in which the element occurs in the environment. Special attention is paid to metals, which are essential for the proper functioning of organisms if present in appropriate amounts but are toxic if in excess (i.e. Se, Cr, Zn), and also to non-essential elements (i.e. Hg,...
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Possibilities of heat transfer augmentation in heat exchangers with minichannels for marine applications
PublicationIn the paper, new trends in development of microchannel heat exchangers are presented. The exchangers developed in this way can be applied in marine applications. Main attention was focused on heat exchangers design with reduced size of passages namely based on microchannels. In our opinion future development of high power heat exchangers will be based on networks micro heat exchangers.
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Diagnosing marine turbine engines through energy characteristics of their flow section
PublicationThe aim of the performed research was to develop of diagnostic method of the flow section of a marine turbine combustion engine based on the level of delamination of its energy characteristics. The here adopted diagnostic model provides for a formulation of the evaluation of the technical conditions based on the measurements of the parameters of the thermodynamic medium in the characteristic control cross-sections of the engine...
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The reuse of brine to enhance the ripening of marine and freshwater fish resistant to marinating
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Hydrodynamic Loads on Marine Propellers Subject to Ventilation and Out of Water Condition
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Hydrodynamic Loads on Marine Propellers Subject to Ventilation and Out of Water Condition
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3D visualisation and monitoring of marine pollutant aggregations in Web-based GIS
PublicationPrzedstawiony internetowy GIS służy do integracji, przetwarzania i wizualizacji pochodzących z wielu źródeł danych o różnych komponentach środowiska morskiego, w tym o zanieczyszczeniach. Jako przykład przedstawiono wyniki trójwymiarowego modelowania rozprzestrzeniania się wylewu olejowego w morzu.
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Detection of corrosion process in marine environment by means of acoustic emission technique
PublicationW pracy przedstawiono możliwość detekcji procesu korozyjnego nieniszczącą metodą emisji akustycznej konstrukcji metalowych pracujących w środowisku wody morskiej. Pewną alternatywą wobec technik elektrochemicznych w monitorowaniu korozji zaproponowano nieniszczącą technikę emisji akustycznej. Emisja akustyczna znana jako zjawisko fizyczne i technika pomiarowa znalazły zastosowanie w detekcji korozji obiektów morskich. W związku...
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Identification of diagnostic parameter sensitivity during dynamic processes of a marine engine
PublicationChanging some parameters of the engine structure alters the emission of harmful components in the exhaust gas. This applies in particular to the damage of charge exchange system as well as fuel system and engine supercharger. These changes are much greater during the dynamic states and their accompanying transitional processes. The different sensitivity of diagnostic parameters to the same force, coming from the engine structure, but...
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Proposal of New Starch-Blends Composition Quickly Degradable in Marine Environment
PublicationThe aim of this paper was to obtain a quickly degradable in seawater polymer blend as an alternative proposal for classical polymer packaging. For preliminary studies: poly(lactic acid) (PLA), starch, calcium carbonate (CaCO3), gelatin and glycerol were chosen. PLA was pointed out due to its biodegradability and comparable properties to polyethylene or polypropylene. Whereas starch was chosen as abundant, renewable and cheap polymer...
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Integration of Geographic Information Systems for Monitoring and Dissemination of Marine Environment Data
PublicationZastosowanie Systemów Informacji Przestrzennej (GIS) do celu monitorowania i wizualizacji różnych procesów środowiska morskiego jest dziedziną badaną od końca XX wieku. W ostatnich latach rozwój szerokopasmowego dostępu do Internetu oraz dostępność klastrów obliczeniowych pozwalają na wykonywanie czasochłonnych i wymagających operacji, takich jak analizy przestrzenne, w sposób zdalny. Jakkolwiek do tej pory sieciowe Systemy Informacji...
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Multibeam Sonar Characterisation of Seafloor in the Context of Visualisation and Dissemination of Marine Data
PublicationThe paper presents the seafloor characterisation method based on multibeam sonar data. it relies on using three types of multibeam seafloor sensing data: 1) the grey-level sonar images (echograms) of seabed, 2) the 3D model of the seabed surface which consists of high resolution bathymetric data, 3) the set of time domain bottom echo envelopes received in the consecutive sonar beams. The classification is performed by utilisation...
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On the Use of Selected 4th Generation Nuclear Reactors in Marine Power Plants
PublicationThis article provides a review of the possibility of using different types of reactors to power ships. The analyses were carried out for three different large vessels: a container ship, a liquid gas carrier and a bulk carrier. A novelty of this work is the analysis of the proposal to adapt marine power plants to ecological requirements in shipping by replacing the conventional propulsion system based on internal combustion engines...
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Operation evaluation method for marine turbine combustion engines in terms of energetics
PublicationAn evaluation proposal (quantitative determination) of an y combustion turbine engine operation has been presented , wherein the impact energy occurs at a given time due to Energy conversion. The fact has been taken into account that in this type of internal combustion engines the energy conversion occurs first in the combustion chambers and in the spaces between the blade of the turbine engine. It was assumed that in the combustion...
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Using Rule-Based System for Monitoring Marine Navigation Data Processing
PublicationProcessing marine navigational data requires sophisticated software solutions. Typically, specialized tools called processors are analyzing raw data from different sensors. It becomes important to create the monitoring software that is able to validate and verify processing components integrated into the final system. Drools®business rule management platform provides a core business rules engine, web authoring and rules management...
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Three-Dimensional Thematic Map Imaging of the Yacht Port on the Example of the Polish National Sailing Centre Marina in Gdańsk
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Bibliotekarz, marka, jakość
PublicationUzupełnię w marcu 2018 r.
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Low-cost solutions for Martian base
PublicationZałogowe misje na Marsa planuje się na 2025-30 r. Wg programu DRM NASA misja trwać ma 2,5 roku, a załoga zamieszka w 2 metalowych ciasnych modułach. Jak wykazują badania socjopsychologów taka misja zakończy się niepowodzeniem. Duża i komfortowa baza wpłynie na zminimalizowanie wielu źródeł stresu. Współczesne technologie i obecny stan wiedzy o Marsie pozwalają na zaprojektowanie i wykonanie bazy marsjańskiej jako przyjaznego człowiekowi...
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Making agile retrospectives more awesome
PublicationAccording to the textbook [23], Scrum exists only in its entirety, where every component is essential to Scrum’s success. However, in many organizational environments some of the components are omitted or modified in a way that is not aligned with the Scrum guidelines. Usually, such deviations result in missing the full benefits of Scrum [24]. Thereby, a Scrum process should be frequently inspected and any deviations should be...
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Marking large amounts of student assignments
PublicationTechnologies offer plenty of possibilities to prepare individual remote online tasks for students. This gives a lot of space to search for ways to overcome the challenges, one of them being grading a high volume of student--generated content. The paper surveys the author’s experience with various forms of student e-activities and various forms of grading.
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Patterns of Ethical Behaviour and Decision Making.
PublicationW pracy przedstawiono propozycję wykorzystania wzorców programowych do opracowania wzorców etycznych, mających na celu wspomaganie prowadzącego projekt informatyczny w podejmowaniu decyzji. Ideę zilustrowano dwoma przykładami.
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Quantitative Storytelling in the Making of a Composite Indicator
PublicationThe reasons for and against composite indicators are briefly reviewed, as well as the available theories for their construction. After noting the strong normative dimension of these measures—which ultimately aim to ‘tell a story’, e.g. to promote the social discovery of a particular phenomenon, we inquire whether a less partisan use of a composite indicator can be proposed by allowing more latitude in the framing of its construction....
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The preferable ways of decision-making in IT teams
PublicationSoftware development team collaboration requires various decisions regarding essential aspects of a project’s progress. General and particular decision-making models are considered, and their main aspects such as team types, problem solving categories, and decision-making ways are analyzed. The research concerns representative groups of IT specialists and their preferences in decision-making are investigated. Four possible cases were...
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Chemometrics and Statistics | Multicriteria Decision Making
PublicationThis contribution describes the application of Multicriteria Decision Making tools in analytical chemistry. The general scheme of MCDM is presented to show its general steps. The most frequently applied in analytical sciences MCDM techniques – AHP, ELECTRE, PROMETHEE and TOPSIS – are briefly described and their advantages and disadvantages are discussed. The applications in analytical chemistry are selection of an appropriate...
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Cloning and characterization of the dnaK heat shock operon of the marine bacterium Vibrio harveyi
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A new marine ecosystem 3D CEMBS model (version 2) for the Baltic Sea
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Fault Tree Analysis and Failure Diagnosis of Marine Diesel Engine Turbocharger System
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Trophic Transfer of Mercury in a Temperate Marine Food Web, Southern Baltic Sea
PublicationMercury (Hg) is considered to be one of the most dangerous global environmental pollutants. The toxicity and bioavailabilityof Hg depend on its chemical form, and the greatest hazard is posed by the organomercurial compounds. Hg is introduced into the human body primarily through the consumption of fish and seafood. Despite numerous studies on Hg in marine organisms, there is still a gap in the knowledge on Hg uptake and...
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Concept of the multidimensional diagnostic tool based on exhaust gas composition for marine engines
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INFLUENCE OF THE MARINE 4-STROKE DIESEL ENGINE MALFUNCTIONS ON THE NITRIC OXIDES EMISSION
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Coastal cliff erosion as a source of toxic, essential and nonessential metals in the marine environment
PublicationDue to the rising environmental awareness, emissions and releases of pollutants, including metals, have been considerably reduced in the last decades. Therefore, the remobiliza-tion of natural and anthropogenic contaminants is gaining importance in their biogeochemical cycle. In the marine coastal zone, this process occurs during the erosion of a shore, especially the most vulnerable cliffs. The research was conducted in the...
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Macrophyta as a vector of contemporary and historical mercury from the marine environment to the trophic web
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The impact of land use and season on the riverine transport of mercury into the marine coastal zone
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Coastal erosion as a source of mercury into the marine environment along the Polish Baltic shore
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Mercury fractionation in marine macrofauna using thermodesorption technique: Method and its application
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Coastal erosion—a “new” land-based source of labile mercury to the marine environment
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Operating and economical conditions of cooling water control for marine steam turbines condensers
PublicationW pracy dokonano analizy ekonomicznej i eksploatacyjnej sterowania pracą pomp wody chłodzącej skraplacze turbin okrętowych. Wzięto pod uwagę cechy konstrukcyjne pomp wody chłodzącej skraplacze główne i najnowsze wyniki badań dla takich pomp w zastosowaniach lądowych. Uwagę skupiono przede wszystkim na turbinowych parowych siłowniach okrętowych.
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Possibility to use engine compression ignition engines in floating power plants marine
PublicationCompression-ignition engines used in ship technology as main propulsion engines are large units reaching even to 50-60 MW. The engines can be used in power industry for electricity generation in a simple or combined steam turbine system in combined heat and power plants. The leading engine in such an arrangement is an internal-combustion piston engine. The main propulsion engines are used in large piston internal-combustion engines...
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The sources of contamination and reasons of damage of the flow part of the marine turbine engine in operation
PublicationThe aim of this paperis to show particular sensitivity of the flow part of the marine turbine engine to the presence of contaminations in the intake air. The contaminations form hard-to-remove deposits in the intervene channels that result in a reduced efficiency and performance of the engine. The paper classifies the contaminants according the source of their formation and their destructive force. The performed analyses and syntheses...
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Accuracy of marine gravimetric measurements in terms of geodetic coordinates of land reference benchmark
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Experimental analysis on the risk of vortex ventilation and the free surface ventilation of marine propellers
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Organotin compounds in the liver tissue of marine mammals from the PolishCoast of the Baltic Sea.
PublicationOznaczono zawartość związków cynoorganicznych w próbkach wątrób pochodzących od ssaków morskich złowionych w polskiej strefie ekonomicznej Morza Bałtyckiego. W ramach przeprowadzonych badań opracowana została oryginalna metodyka analityczna. Całkowite stężenie związków z tej grupy wahało się w granicach od 43,9 do 7698 ng Sn/g próbki (w przeliczeniu na suchą masę). Badano zależność stężeń tych związków od wieku i płci osobników.