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Search results for: starzenie sie
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Experimental research on effectiveness of the magnetic fluid seals for rotary shafts working in water
PublicationUszczelnianie wałów obrotowych, łożysk i innych zespołów mechanicznych, za pomocą cieczy magnetycznej, tworzącej przegrodę uszczelniającą utrzymywaną siłami pola magnetycznego jest techniką uszczelniania, stosowaną z powodzeniem w urządzeniach pracujących w środowisku gazowym przy ciśnieniu do około 1,0 MPa. Uszczelnienia te umożliwiają również skuteczne rozwiązywanie problemu szczelności przepustów stałych i ruchowych w urządzeniach...
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Revealing the Influence of the Shape, Size, and Aspect Ratio of ZnO Nanoparticles on Antibacterial and Mechanical Performance of Cellulose Fibers Based Paper
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Contrasting effects of operating conditions and biomass particle size on bulk characteristics and surface chemistry of rice husk derived-biochars
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Regulacje prawne odnoszące się do testowania samochodów autonomicznych na drogach publicznych w Polsce i Kalifornii
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Sawdust size distribution analysis of thermally modified and unmodified oak wood sawed on the frame sawing machine PRW15-M
PublicationW pracy przedstawiono wyniki analizy granulometrycznej składu wiórów drewna dębowego niemodyfikowanego i modyfikowanego termicznie uzyskanych podczas piłowania na pilarce ramowej PRW15-M z prędkością posuwu 1.67 mmin-1. Otrzymane trociny termicznie modyfikowanego drewna dębowego składają się z wiórów o ziarnistości w przedziale od 44.7 mm do 4.6 mm, podczas gdy dla drewna niemodyfikowanego zaobserwowano zmiany ziarnistości w granicach...
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Wyniki finansowe polskich przedsiębiorstw rybołówstwa morskiego i przetwórstwa rybnego oraz wpływ na nie podatku VAT
PublicationW artykule przeanalizowano skutki ew. wzrostu podatku VAT na dalszą działalność przedsiębiorców rybackich oraz na ceny produktów połowowych i przetworów rybnych. Zwrócono uwagę na mogące powstać w związku z tym ew. zagrożenia, dla konsumenckiego rynku rybnego, który należy do tzw. "wrażliwego" obszaru rolnego.
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Computer vision techniques applied for reconstruction of seafloor 3D images from side scan and synthetic aperture sonars data
PublicationThe Side Scan Sonar and Synthetic Aperture Sonar are well known echo signal processing technologies that produce 2D images of the seafloor. Both systems combines a number of acoustic pings to form a high resolution image of seafloor. It was shown in numerous papers that 2D images acquired by such systems can be transformed into 3D models of seafloor surface by algorithmic approach using intensity information, contained in a grayscaled...
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Ekspertyza techniczna dotycząca zawalenia się ścian zabytkowej wieży kościoła pw. Podwyższenia Krzyża Świętego w Otyniu
PublicationEkspertyza dot. określenia przyczyn zawalenia się wieży zabytkowego kościoła w Otyniu, w sierpniu 2012 r.
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Patch size setup and performance/cost trade-offs in multi-objective antenna optimization using domain patching technique
PublicationA numerical study concerning multi-objective optimization of antenna structures using sequential domain patching (SDP) technique has been presented. We investigate the effect of various setups of the patch size on the operation of the SDP algorithm and possible trade-offs concerning the quality of the Pareto set found by SDP and the computational cost of the optimization process. Our considerations are illustrated using a UWB monopole...
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Elektroniczne papierosy –(nie)bezpieczne palenie? Cz.2 Metody oznaczania związków obecnych w płynie i aerozolu
PublicationWzrost zainteresowania nad stosowaniem elektronicznych papierosów wymaga opracowania nowych procedur analitycznych, które pozwolą na prowadzenie kontroli jakości tych wyrobów. Brak jest miarodajnych wyników badań umożliwiających kompleksową analizę składu jakościowego i ilościowego płynu jak i aerozolu. Sytuacja ta budzi wiele obaw, ponieważ niemożliwa jest realna ocena zagrożenia na jakie narażony jest użytkownik elektronicznego...
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Multi-objective design optimization of antenna structures using sequential domain patching with automated patch size deter-mination
PublicationIn this paper, a simple yet efficient and reliable technique for fully automated multi-objective design optimization of antenna structures using sequential domain patching (SDP) is discussed. The optimization procedure according to SDP is a two-step process: (i) obtaining the initial set of Pareto-optimal designs representing the best possible trade-offs between considered conflicting objectives, and (ii) Pareto set refinement...
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Prezentacja zespołu prac malarskich, rysunkowych i tekstowych pt. Osobisty poradnik jak nie dostać depresji turysty
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Hybrid stepless distribution transformer with four-quadrant AC/DC/AC converter at low voltage side - simulation tests
PublicationThe article presents the work of the stepless hybrid distribution transformer (HT), as an alternative to the so far applied Automatic Voltage Regulator (AVR) solutions, used to control the voltage in the power system in terms of the fundamental harmonic. The HT is a combination of a conventional distribution transformer and an AC/DC/AC converter connected in series with the transformers secondary winding. In the work the basic...
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Explicit Size-Reduction-Oriented Design of a Compact Microstrip Rat-Race Coupler Using Surrogate-Based Optimization Methods
PublicationIn this paper, an explicit size reduction of a compact rat-race coupler implemented in a microstrip technology is considered. The coupler circuit features a simple topology with a densely arranged layout that exploits a combination of high- and low-impedance transmission line sections. All relevant dimensions of the structure are simultaneously optimized in order to explicitly reduce the coupler size while maintaining equal power...
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Niskokoherencyjne czujniki światłowodowe przeznaczone do pracy w warunkach zmieniającego się tłumienia sygnału w torze optycznym
PublicationRozprawa poświęcona jest zagadnieniu niskokoherencyjnych czujników światłowodowych. Badania przedstawione w pracy miały na celu ocenę możliwości zaimplementowania niskokoherencyjnych czujników światłowodowych do pomiaru różnych wielkości fizycznych z uwzględnieniem warunków zmieniającego się tłumienia sygnału w torze optycznym. W rozprawie zawarto informacje na temat czujników światłowodowych. Dokonano również analizy stanu wiedzy...
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Multi-objective design optimization of antennas for reflection, size, and gain variability using kriging surrogates and generalized domain segmentation
PublicationCost-efficient multi-objective design optimization of antennas is presented. The framework exploits auxiliary data-driven surrogates, a multi-objective evolutionary algorithm for initial Pareto front identification, response correction techniques for design refinement, as well as generalized domain segmentation. The purpose of this last mechanism is to reduce the volume of the design space region that needs to be sampled in order...
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Ekspertyza techniczna dotycząca zawalenia się ścian zabytkowej wieży kościoła pw. Podwyższenia Krzyża Świętego w Otyniu
PublicationDokonano analizy powstania awarii konstrukcji wieży kościoła. Ustalono ich przyczynę.
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LQT – czy technologie poprawiające jakość życia mogą stać się szansą rozwojową dla pomorskich przedsiębiorstw MSP
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Vibro-Electrical Behavior of a Viscoelastic Piezo-Nanowire in an Elastic Substrate Considering Stress Nonlocality and Microstructural Size-Dependent Effects
PublicationThis research deals with dynamics response of a Pol/BaTiO3 nanowire including viscosity influences. The wire is also impressed by a longitudinal electric field. Hamilton's principle and Lagrangian strains are employed in conjunction with a refined higher-order beam theory in order to derive equations of motion. By combining nonlocality and small size...
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Nowotwory neuroendokrynne jelita cienkiego i wyrostka robaczkowego — zasady postępowania (rekomendowane przez Polską Sieć Guzów Neuroendokrynnych)
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Expression and Cellular Distribution of INHA and INHB before and afterIn VitroCultivation of Porcine Oocytes Isolated from Follicles of Different Size
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Size-defined synthesis of magnetic nanorods by Salvia hispanica essential oil with electromagnetic excitation properties useful in microwave imagining
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Spectroscopic Characterization of Miniaturized Atmospheric-Pressure dc Glow Discharge Generated in Contact with Flowing Small Size Liquid Cathode
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Surface Site Modulations by Conjugated Organic Molecules To Enhance Visible Light Activity of ZnO Nanostructures in Photocatalytic Water Splitting
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Characterization of Rosa canina Fruits Collected in Urban Areas of Slovakia. Genome Size, iPBS Profiles and Antioxidant and Antimicrobial Activities
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Alterations in the metabolism of tryptophan in patients with chronic hepatitis C six months after pegylated interferon-α 2a treatment
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Deep insight into the pore size distribution of N-doped porous carbon materials on electrochemical energy storage and CO2 sorption
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The impact of potential leakage from the sub-seabed CO2 storage site on the phosphorus transformation in marine sediments – An experimental study
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The Effect of Surface Topography Feature Size Density and Distribution on the Results of a Data Processing and Parameters Calculation with a Comparison of Regular Methods
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The level of 8-oxo-7,8-dihydro-2′-deoxyguanosine is positively correlated with the size of the labile iron pool in human lymphocytes
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Influence of the melt holding time on fat droplet size and the viscoelastic properties of model spreadable processed cheeses with different compositions
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A 220 V/W, 25 pW/√Hz NEP bow-tie antenna-coupled pHEMT detector at 250 GHz
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Abelson Helper Integration Site 1 haplotypes and peripheral blood expression associates with lithium response and immunomodulation in bipolar patients
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Surface Site Modulations by Conjugated Organic Molecules To Enhance Visible Light Activity of ZnO Nanostructures in Photocatalytic Water Splitting
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Image Processing of Mg-Al-Sn Alloy Microstructures for Determining Phase Ratios and Grain Size and Correction with Manual Measurement
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SSE PLATFORM APPLICATION TO EXTEND OPERATIONABILITY OF WEB-GIS BASED MARINE SERVICES OF AN HRPT-METOP SATELLITE GROUND STATION
PublicationEarth Observation (EO) products are widely used by geospatial society. Over the last years a number of new applications of satellite imagery were proposed. This led to an increased interest in EO products, not only from researchers but also from companies and individuals. The authors constitute the essential part of the team that created the marine, web-GIS system - SafeCity GIS - for dissemination of data obtained from a 1.5 metre...
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INFLUENCE OF DREDGER POWER PLANT TYPE AND DREDGER SIZE ON OUTPUT OF POWER PLANT INSTALLED ON TRAILING SUCTION HOPPER DREDGER
PublicationThis paper presents results of investigations dealing with influence of parameters characterizing size of suction hopper dredger as well as type of power system on magnitude of total output of combustion engines installed in dredger power plant.
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Fatigue life prediction of notched components under size effect using strain energy reformulated critical distance theory
PublicationNotch and size effects show significant impact on the fatigue performance of engineering components, which deserves special attention. In this work, a strain energy reformulated critical distance theory was developed for fatigue life prediction of notched components under size effect. Experimental data of different notched specimens manufactured from GH4169, TC4, TC11 alloys and low carbon steel En3B were used for model validation...
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Reduction of exceeding the guaranteed service time for external trucks at the DCT Gdańsk container terminal using a six sigma framework
PublicationPurpose The purpose of this research was to investigate ways to reduce the average amount of exceeded guaranteed service time for external trucks at Deepwater Container Terminal Gdańsk Sp z o.o. (DCT Gdańsk) via dosing the gate activities, in particular IN-Gate entry process of trucks carrying import/export/transit containers. Design/methodology/approach A Six Sigma methodology with the DMAIC methods along with the SIPOC chart,...
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Przekształtnik SiC DC-DC z transformatorem macierzowym do pokładowych ładowarek baterii akumulatorów taboru 3kV DC
PublicationBaterie akumulatorów pojazdów trakcyjnych zapewniają zasilanie krytycznych systemów, takich jak sterowanie i oświetlenie. Zgodnie z wymaganiami przemysłu kolejowego, pokładowa ładowarka baterii akumulatorów powinna być urządzeniem kompaktowym, wysokosprawnym, a jednocześnie wysoce niezawodnym. W referacie, do pokładowego ładowania akumulatorów pociągu zaproponowano kompaktowy przekształtnik SiC DC-DC z transformatorem macierzowym...
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A technique of experiment aided virtual prototyping to obtain the best spindle speed during face milling of large-size structures
PublicationThe paper presents an original method concerning vibration suppression problem during milling of large-size and geometrically complicated workpieces with the use of novel way of selecting the spindle speed. This consists in repetitive simulations of the cutting process for subsequent values of the spindle speed, until the best vibration state of the workpiece is reached. An appropriate method of obtaining a computational model,...
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The Influence of COD Fraction Forms and Molecules Size on Hydrolysis Process Developed by Comparative OUR Studies in Activated Sludge Modelling
PublicationThe activated sludge models (ASMs) commonly used by the International Water Association (IWA) task group are based on chemical oxygen demand (COD) fractionations. However, the proper evaluation of COD fractions, which is crucial for modelling and especially oxygen uptake rate (OUR) predictions, is still under debate. The biodegradation of particulate COD is initiated by the hydrolysis process, which is an integral part of an ASM....
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Active Site Architecture and Reaction Mechanism Determination of Cold Adapted beta-D-galactosidase from Arthrobacter sp. 32cB
PublicationArthbetaDG is a dimeric, cold-adapted beta-D-galactosidase that exhibits high hydrolytic and transglycosylation activity. A series of crystal structures of its wild form, as well as its ArthbetaDG_E441Q mutein complexes with ligands were obtained in order to describe the mode of its action. The ArthbetaDG_E441Q mutein is an inactive form of the enzyme designed to enable observation of enzyme interaction with its substrate. The...
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An Experimentally Aided Operational Virtual Prototyping to Obtain the Best Spindle Speed during Face Milling of Large-Size Structures
PublicationAbstract: The paper presents an original method concerning the problem of vibration reduction in the general case while milling large-size and geometrically complex details with the use of an innovative approach to the selection of spindle speed. A computational model is obtained by applying the so-called operational approach to identify the parameters of the workpiece modal model. Thanks to the experimental modal analysis results,...
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Przekształtnik SiC DC-DC z transformatorem macierzowym do pokładowych ładowarek baterii akumulatorów taboru 3kV DC
PublicationBaterie akumulatorów pojazdów trakcyjnych zapewniają zasilanie krytycznych systemów, takich jak sterowanie i oświetlenie. Zgodnie z wymaganiami przemysłu kolejowego, pokładowa ładowarka baterii akumulatorów powinna być urządzeniem kompaktowym, wysokosprawnym, a jednocześnie wysoce niezawodnym. W referacie, do pokładowego ładowania akumulatorów pociągu zaproponowano kompaktowy przekształtnik SiC DC-DC z transformatorem macierzowym...
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Failure analysis of a high-speed induction machine driven by a SiC-inverter and operating on a common shaft with a high-speed generator
PublicationDue to ongoing research work, a prototype test rig for testing high-speed motors/generators has been developed. Its design is quite unique as the two high- speed machines share a single shaft with no support bearings between them. A very high maximum operating speed, up to 80,000 rpm, was required. Because of the need to minimise vibration during operation at very high rotational speeds, rolling bearings were used. To eliminate...
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Advanced oxidation processes (AOPs) based wastewater treatment - unexpected nitration side reactions - a serious environmental issue: A review
PublicationChemical compounds containing nitro group (nitro-products) are a one of toxic by-products, that can be formed during wastewater treatment processes. In case of presence of nitrite or nitrate ions, the formation of nitro-products during advanced oxidation processes (AOPs) is very common. It is caused by the reactive nitrogen species (RNs) such as nitrate radical (NO3•), nitrite radical (NO2•), nitrogen oxide radical (NO•) and peroxynirite...
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Investigation of Wood Flour Size, Aspect Ratios, and Injection Molding Temperature on Mechanical Properties of Wood Flour/Polyethylene Composites
PublicationIn the present research, wood flour reinforced polyethylene polymer composites with a coupling agent were prepared by injection molding. The effects of wood flour size, aspect ratios, and mold injection temperature on the composites’ mechanical properties were investigated. For the preparation of the polymer composites, five different formulations were created. The mechanical properties including tensile strength and the modulus,...
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Relationship between Chemical Structure and Biological Activity Evaluated In Vitro for Six Anthocyanidins Most Commonly Occurring in Edible Plants
PublicationNumerous studies have provided evidence that diets rich in anthocyanins show a broad spectrum of health benefits. Anthocyanins in nature are usually found in the form of glycosides. Their aglycone forms are called anthocyanidins. The chemical structure of anthocyanins is based on the flavylium cation, but they differ in the position and number of substituents. However, the bioactives and foods that contain them are frequently treated...
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Prawa i obowiązki przedsiębiorcy w prawidłowym przygotowaniu postępowania toczącego się przed sądem gospodarczym - wybrane zagadnienia.
PublicationW pracy zostały poruszone zagadnienia związane z prawidłowym przygotowaniem postępowania sądowego w sprawach gospodarczych - ze szczególnym uwzględnieniem obowiązków stron. Najtrudniejszym obowiązkiem powoda jest prawidłowe przygotowanie wszystkich dokumentów w tym zmierzających do przeprowadzenia negocjacyjnego postępowania mediacyjnego.