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Bias mitigation benchmark that includes two datasets
Open Research DataISIC-2020 is the largest skin lesion dataset divided into two classes -- benign and malignant. It contains 33126 dermoscopic images from over 2000 patients. The diagnoses were confirmed either by histopathology, expert agreement or longitudinal follow-up. The dataset was gathered by The International Skin Imaging Collaboration (ISIC) from several medical...
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Method of managing drill cuttings from shale gas formations
PublicationProposed management method of drill cuttings involves recycling for the expanded clay production. A theoretical presentation of the possibility, choosing planning path based on similarity between the materials used in the manufacture of expanded clay and oily cuttings. Application for the main stages of manufacture of expanded clay production of drill cuttings from shale gas extraction. Introduced into circulation solid waste partly...
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The enantiomeric determination of chloro-precursors of methamphetamine
PublicationImpurity profiling and classification of seized methamphetamine may supply valuable information with respect to the conditions and the chemicals used in the illicit methamphetamine manufacture and may provide information on the original source of the sample. Determination of the stereochemical makeup of forensic samples is important as well for the same reasons. Laboratories in many places are engaged in clandestine manufacture...
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Optical measurements of LTO:Cu sol-gel derived thin films
Open Research DataLithium titanate doped by copper thin films were manufactured by chemical, sol-gel method. Flms were deposited on a Corning glass substrated by spin coater. To calculated optical band gap and other optcal parameters, UV-VIS spectroscopy measurements were performed. For measurements selected samples with various content of Cu.
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Current status and future success of renewable energy in Pakistan
PublicationMismatch between energy demand and supply from last two decades has been increasing because of the domination of expensive imported oil in energy mix of Pakistan. To import crude oil Government paid US $ 9 billion in 2008–2009 to meet the energy demands...
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A Framework for Enhancing Supplier Selection Process by Using SOEKS and Decisional DNA
PublicationAbstract. Supplier selection process is one of the significant stages in supply chain management for industrial manufactured products. It plays an integral role in the success of any manufacturing organization and is an important part starting right from selecting raw material to dispatch of finished products. This paper contributes to enhance the supplier selection process by proposing a multi-criteria decision making framework...
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Gas Turbine Cycle with External Combustion Chamber for Prosumer and Distributed Energy Systems
PublicationThe use of various biofuels, usually of relatively small Lower Heating Value (LHV), affects the gas turbine efficiency. The present paper shows that applying the proposed air by-pass system of the combustor at the turbine exit causes tan increase of efficiency of the turbine cycle increased by a few points. This solution appears very promising also in combined gas/steam turbine power plants. The comparison of a turbine set operating...
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Analiza techniczno-ekonomiczna współspalania różnych rodzajów paliw w bloku energetycznym dużej mocy
PublicationPrzeanalizowano możliwości współspalania różnych rodzajów paliw w bloku energetycznym elektrowni cieplnej dużej mocy. Rozważono blok wyposażony w kocioł fluidalny ze złożem cyrkulacyjnym, jak również kocioł opalany biomasą oraz zespół z turbozespołem gazowym. Rozpatrzono wpływ udziału biomasy w łącznej ilości zużywanego paliwa, a także wpływ zastosowania zespołu z turbiną gazową na wskaźniki techniczno-ekonomiczne bloku energetycznego....
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Badania potencjału energetycznego pozostałości poprodukcyjnej z hodowli boczniaka
PublicationNiniejsze opracowanie dotyczy badań potencjału energetycznego biomasy, obecnie trzeciego co do wielkości naturalnego źródła energii na świecie. Energia zawarta w biomasie jest najmniej kapitałochłonnym źródłem energii odnawialnej. Jej pozyskiwanie nie wiąże się z wprowadzaniem zanieczyszczeń do środowiska, przy okazji istnieje możliwość pozbycia się kłopotliwych odpadów poprodukcyjnych. Jednak pozyskiwanie energii z biogazu jest...
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The Impact Of The Selected Parameters Of Fdm Manufacturing Technology On Tribological Performance Of Abs–Steel Pair Under Dry Friction
PublicationThe paper presents the result of tribological test of ABS and steel samples sliding under dry friction. Polymeric samples were manufactured of ABS material using FDM technology. Testing was carried out in unidirectional sliding in a ring-on-flat contact in a PT-3 tribometer. The scope of tested parameters included volumetric and mass wear, the friction coefficient, and polymeric specimen temperature. Polymeric specimens used in...
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Cień Boga w ogrodzie filozofa. Parc de La Villette w Paryżu w kontekście filozofii chôry
PublicationKsiążka „Cień Boga w ogrodzie filozofa. Parc de La Villette w Paryżu w kontekście filozofii chôry” przedstawia filozoficzne dyskusje, jakie towarzyszyły projektowaniu rozległego parku w paryskiej dzielnicy La Villette. Na teoretyczne założenia parku złożyły się teksty Bernarda Tschumiego, w których kwestionował on tradycyjne sposoby tworzenia dzieła architektury postulując w zamian zastosowanie długiego szeregu...
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Exsolution of Ni nanoparticles on the surface of cerium and nickel co-doped lanthanum strontium titanate as a new anodic layer for DIR-SOFC. Anti-coking potential and H2S poisoning resistance of the prepared material
PublicationThe aim of this study was to evaluate a new catalytic material for biogas fueled DIR-SOFC. This material was a perovskite-type SrTiO3 doped with La, Ce and Ni of a general formula La0.27Sr0.54Ce0.09Ni0.1Ti0.9O3-σ (LSCNT). Additional preparation steps were undertaken to promote a nickel exsolution process. Heat post-treatment of powders in a humidified H2 resulted in an intensive growth of nickel nanoparticles (NPs) while the temperature...
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Mass spectrometric identification of 13C-Labeled metaboloites during anaerobic propanoic acid oxidation
PublicationBiowaste digestion is a possibility to gain biogas as a renewable fuel source. However, the anaerobic food chain may be disrupted by, e.g., substrate overload or by inhibitors, leading to the accumulation of volatile fatty acids (VFAs), predominantly of propanoic acid (PA). VFA Accumulation may cause a rapid pH decrease, less biogas production, or even a total inhibition. To maintain high biogas productivity or to prevent a collapse...
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Mass Spectrometric Identification of 13C-Labeled Metabolites DuringAnaerobic Propanoic Acid Oxidation
PublicationBiowaste digestion is a possibility to gain biogas as a renewable fuel source. However, the anaerobic food chain may be disrupted by, e.g., substrate overload or by inhibitors, leading to the accumulation of volatile fatty acids (VFAs), predominantly of propanoic acid (PA). VFA Accumulation may cause a rapid pH decrease, less biogas production, or even a total inhibition. To maintain high biogas productivity or to prevent a collapse...
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Recycling of waste tires in the light of binding law in Poland
PublicationA risings of large quantities of used rubber products, especially used tires has been increasing every year in Poland, in 2006 it was 160 thousand. The waste management and recycling of used tires become a major environmental problem. Well known methods of utilization of used tires are presented in this article. The main problem is ignorance of the law by tyre manufactures and users. In Poland first act on waste introduces ban...
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XRD investigations of the lithium titanate thin films
Open Research DataNanocrystalline thin films with 800 nm thickness were prepared by sol–gel method. To examine the influence of the annealing temperature on as-prepared films crystallization, the coatings were heated at temperature from 500 °C up to 600 °C for 20h. Structure of manufactured thin films was investigated using X-ray diffraction (XRD). The most visible...
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Mass Spectrometric Identification of 13C-labeled Metabolites During anaerobic Propanoic Acid Oxidation
PublicationBiowaste digestion is a possibility to gain biogas as a renewable fuel source. However, the anaerobic food chain may be disrupted by, e.g., substrate overload or by inhibitors, leading to the accumulation of volatile fatty acids (VFAs), predominantly of propanoic acid (PA). VFA Accumulation may cause a rapid pH decrease, less biogas production, or even a total inhibition. To maintain high biogas productivity or to prevent a collapse...
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Zastosowanie wysokosprawnej kolumnowej chromatografii cieczowej w odwróconych układach faz (RP-HPLC) do rozdzielania i wstępnej identyfikacji składników hydrofilowych mieszanin po hydrolizie zasadowej biomasy ligno-celulozowej (BMLC)
PublicationWzrost konsumpcji paliw kopalnych, ich pozyskiwanie oraz eksploatacja niesie ze sobą wiele zagrożeń dla środowiska, dlatego alternatywnym źródłem energii stają się biopaliwa, w tym bio-wodór pozyskiwany w konwersji biomasy ligno-celulozowej, która poddawana jest obróbce wstępnej. Najczęściej wykorzystywaną metodą obróbki wstępnej jest hydroliza alkaliczna, podczas której powstaję bardzo dużo produktów ubocznych, nieprzydatnych...
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The Accuracy of a Marine Satellite Compass under Terrestrial Urban Conditions
PublicationWhen used at sea, satellite compasses are capable of determining the course of a sailing vessel with high accuracy. It is dicult to verify the accuracy declared by the device manufacturer under such conditions, as it is dicult to define a reliable reference. This study analyses the accuracy of the satellite compass in an urban setting, with the satellite signal being obscured to various extents. It is an important point in the...
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SPTNO ceramics measured by XPS method
Open Research DataSPTNO (Sr-Pr-Ti-Ni-O) ceramic were manufactured by solid state reaction, from oxides compounds. Synthesis conducted in air atmosphere at temperature in a range of 800-900 deg. Chemical composition of prepared materials were measured by XPS (X-Ray photoemision spectroscopy) method. UHV OmicronNanotechnology system with 128 channel Argus hemispherical...
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Prediction of cutting forces during micro end milling considering chip thickness accumulation
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The estimation of cutting forces and specific force coefficients during finishing ball end milling of inclined surfaces
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Optimal spindle speed determination for vibration reduction during ball-end milling of flexible details
PublicationIn the paper a method of optimal spindle speed determination for vibration reduction during ball-end milling of flexible details is proposed. In order to reduce vibration level, an original procedure of the spindle speed optimisation, based on the Liao–Young criterion, is suggested. As the result, an optimal, constant spindle speed value is determined. For this purpose, on-stationary computational model of machining process is...
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Three series of measurement of spring force in relation to deflection of disc springs assembled in X configuration.
Open Research DataAttached data consist of three series of conducted measurement of disc springs package characteristic. The characteristic describes relation between spring force and deflection of the package. First column of each serie present axial deflection of the package, while second columns contain recorded spring force. Object of research contained six disc...
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Wpływ temperatury na skład produktów pirolizy
PublicationPraca prezentuje wyniki badań pirolizy biomasy przy różnych temperaturach maksymalnych prowadzenia pro- cesu. Biomasą użytą w eksperymentach były zrębki brzozowe. Analizowano udziały masowe pięciu frakcji pro- duktów: karbonizatu, smół lekkich, smół ciężkich, wody oraz gazu pirolitycznego. Wykonano także analizy ciepła spalania poszczególnych frakcji w zależności od temperatury prowadzenia procesu. Eksperymenty wykonano przy pomocy...
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Reduction of the strontium titanate doped by Ytrium ceramics observed by X-ray photoemission spectroscopy method
Open Research DataYtrium-doped strontium titanate (YSTF) ceramics materials were manufactured by three various methods: 1) standard solid-state reaction method from Y2O3 (Sigma Aldrich, 99,9%), TiO2 (Sigma Aldrich, 99%) and SrCO3 (Sigma Aldrich,98%), 2) Pechini method, 3) wet method.
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On degradation of glass/polyester laminate immersed in water
PublicationMechanical behaviour was compared for glass/ polyester laminates manufactured in the boatbuilding plant using three methods: hand lay-up, vacuum bagging, infusion. Specimens were tested in dry condition and following accelerated water immersion test (70°C- corresponding to the exposure of 30 years at 19°C). In three point bending test 40-50% reduction in laminate strength was observed due to water immersion. The highest degradation...
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The AFM micrographs of gold nanoparticles on silicon substrate
Open Research DataThe dataset contains the first approach towards AFM topographic imaging of gold nanoparticles synthesized and immobilized on the silicon surface. Measurements were made in the semi-contact mode on the NTEGRA Prima device, manufactured by NT-MDT. Scans were performed with amplitude detection at an operating value of 60% of the free oscillation amplitude....
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XPS investigations of tge tin/tin oxides - CNT composites
Open Research DataThe composite of tin/tin oxide nanoparticles with graphene oxide and CMC based on laser ablation technique as an electrode material for energy storage devices were manufactured. The material exhibited a three-dimensional conducting graphene oxide network decorated with tin or tin oxide nanoparticles. The presence of tin/tin oxide in composites was...
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Current trends in solid-phase microextraction (SPME) fibre catings
PublicationThis critical review presents information on known and innovative approaches to the manufacture of fibre coatings used in solid-phase microextraction (SPME). The properties, advantages and drawbacks of the different types of commercially available SPME fibre coatings are discussed in detail, as are those of novel types of coatings and the methodologies of their preparation. The applications of fibre coatings in the solid-phase...
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Energy neutrality versus carbon footprint minimization in municipal wastewater treatment plants
PublicationThis work aimed to compare the carbon footprint (CF) of six full-scale wastewater treatment plants (WWTPs). The CF was estimated in the range of 23–100 kg CO2e per population equivalent. In the total CF, the direct emissions held the highest share (62–74%) for the plants with energy recovery from biogas. In the plants depending entirely on the power grid, the indirect emissions due to energy consumption dominated the total CF (69–72%)....
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Bartosz Dawidowicz dr inż.
PeopleHe graduated from the Faculty of Mechanical Engineering at Gdańsk University of Technology MSc Eng. - Faculty of Mechanical Engineering, Gdansk University of Technology: specialization: Machines and Equipment of Food Industry (2000)PhD - Faculty of Mechanical Engineering, Gdansk University of Technology, discipline: construction and operation of machines, specialization: heat transfer (2008) Main areas of scientific activity related...
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Symulacja komputerowa obiektu dynamicznego na przykładzie biogazowni
PublicationW artykule przedstawiono symulator czasu rzeczywistego biogazowni rolniczej. Przedstawiony symulator obejmuje obiegi biomasy, biogazu a także obieg grzewczy wraz z systemem sterowania urządzeniami układów biogazowni oraz wizualizacją procesów. Badania koncentrowały się na wykonaniu symulatora, który odzwierciedla istniejące instalacje. Oprogramowaniem służącym do symulacji jest system CFD (Computational Fluid Dynamics) dający...
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Composite sandwich footbridge - measured dynamic response vs. FEA
PublicationThe paper describes a process of in situ dynamic tests of a composite sandwich footbridge before its accepta-tion for exploitation in real traffic conditions. It is only a part of a big research task that includes design, manufacture and introduce practical application of the bridge. The in situ measured natural modes and fre-quencies are compared with numerically determined ones. Finite element analysis is established to estimate...
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Szare na złote, czyli zgazowanie odpadów
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THE INFLUENCE OF HOUSING ARRANGEMENT AND INTERFERENCE ON PRELOAD AND THEORETICAL LIFETIME OF A SYSTEM OF TAPER ROLLER BEARINGS OF A HIGH SPEED SHAFT OF A WIND TURBINE GEARBOX
PublicationA system of two taper roller bearings can carry loads with a high ratio of axial load to radial load. Such a system was proposed for a wind turbine gearbox following the poor durability of original bearing design with the aim of increasing durability. Because of size limits, a proposed system is composed of two different taper roller bearings. Standard manufacturers’ catalogues do not provide information on recommended preload...
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Development and application of asphalt binder relaxation test in different dynamic shear rheometers
PublicationIn this study, a novel relaxation test is proposed to evaluate asphalt binder low temperature properties using a Dynamic Shear Rheometer (DSR) with parallel plates of 4 mm in diameter. Three rheometers from three different manufacturers are used to analyze seven asphalt binders. Different material parameters are derived which are useful to evaluate and discriminate different asphalt binders. Test results of all three instruments...
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The Influence of Low-Temperature Disintegration on the Co-Fermentation Process of Distillation Residue and Waste-Activated Sludge
Publication: Innovative low-temperature disintegration (process temperature 55 ◦C and oxygen concentration 0.2 mg/dm3 ) can be an economically rational technology to intensifying energy production from renewable sources. The proposed process can achieve a degree of disintegration—under optimal conditions—of about 50%, which is excellent when compared with other methods of feed pre-treatment. The low-temperature disintegration of distillation...
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The generalization by simplification operator with the Simplify Building tool of objects representing groups of buildings in Gdańsk district - scale 1:10000. Data from OSM
Open Research DataThe process of automatic generalization is one of the elements of spatial data preparation for the purpose of creating digital cartographic studies. The presented data include a part of the process of generalization of building groups obtained from the Open Street Map databases (OSM) [1].
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Keratinocyte-derived small extracellular vesicles supply antigens for CD1a-resticted T cells and promote their type 2 bias in the context of filaggrin insufficiency
PublicationIntroduction: Exosome-enriched small extracellular vesicles (sEVs) are nanosized organelles known to participate in long distance communication between cells, including in the skin. Atopic dermatitis (AD) is a chronic inflammatory skin disease for which filaggrin (FLG) gene mutations are the strongest genetic risk factor. Filaggrin insufficiency affects multiple cellular function, but it is unclear if sEV-mediated cellular communication...
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How to render FDTD computations more effective using agraphics accelerator.
PublicationGraphics processing units (GPUs) for years have been dedicated mostly to real time rendering. Recently leading GPU manufactures have extended their research area and decided to support also graphics computing. In this paper, we describe an impact of new GPU features on development process of an efficient finite difference time domain (FDTD) implementation.
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Nowe metodyki analityczne w oparciu o technikę dyspersyjnej mikroekstrakcji w układzie ciecz-ciecz
PublicationPrezentowana praca doktorska poświęcona jest tematyce związanej z opracowaniem nowych metodyk analitycznych, w których zastosowano technikę dyspersyjnej mikroekstrakcji w układzie ciecz-ciecz spełniającej wymogi zielonej chemii do analizy próbek ciekłych w celu oznaczenia śladowych ilości składników organicznych. Głównym problemem w przypadku stosowania techniki DLLME w praktyce laboratoryjnej jest konieczność użycia toksycznych...
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Wojciech Chrzanowski dr hab. inż.
PeopleWojciech Chrzanowski was born in 1952 in Toruń. He completed his studies in Chemical Technology in 1975, getting his MSc in Inorganic Technology (specialty: Anti-Corrosion Protection) At the Faculty of Chemistry, Gdańsk University of Technology (with distinction). Later this year he was employed in the Department of Analytical Chemistry of then Institute of Chemical Engineering and Measuring Techniques, initially as a technical...
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RSM for pre-treatment optimisation
Open Research DataBox Behnken Design was prepared to define optimal contitions for biomass pretreatment
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Simulation research on the tool cycle in automated manufacturing system at selected tool duplication levels
PublicationThe paper presents results of the research concerning impact of applied tool exchange rule on the efficiency of an automated manufacturing system. The research consider the tool duplication levels that constrain realisation of a manufacturing process. Presented study was based on the real industrial system data. The operating of the investigated system of manufacture, including tools necessary for its realisation, was modelled...
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A SEARCH OF AN INDUCER GEOMETRY THAT IS BENEFICIAL FOR LIFTING PARAMETERS OF A LIFTED OBJECT OF A SELECTED SHAPE
PublicationThe literature describes acoustic levitation phenomena with the utilization of air squeeze film between the vibrating inducer and the lifted object. The objective of the study is to determine the shape of the inducer with vibration characteristics that would allow the levitation of an object of the assumed geometry. In this paper, the influence of the dimension ratio of the inducer on the frequency of the first mode of vibration...
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Klasyfikacja wyrobów tytoniowych z wykorzystaniem elektronicznych nosów
PublicationZapobieganie nielegalnej dystrybucji wyrobów tytoniowych w Polsce stanowi poważny problem. Wyroby tytoniowe przemycane do Polski mogą charakteryzować się niższą jakością, wynikającą z wykorzystania surowców gorszego gatunku. Jednym z rozwiązań zmniejszających skalę tego problemu mogą być działania ograniczające przemyt przez granice państwa. Autorzy pracy uważają, że wykorzystanie elektronicznych nosów do rutynowych kontroli przewożonych...
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The generalization of objects representing groups of buildings in the Kartuzy district by simplification operator with the Simplify Building tool - scale 1:10000. Data from OSM.
Open Research DataThe process of automatic generalization is one of the elements of spatial data preparation for the purpose of creating digital cartographic studies. The presented data include a part of the process of generalization of building groups obtained from the Open Street Map databases (OSM) [1].
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Sensitivity study of correlation for flow boiling in tubes.
PublicationW referacie skupiono uwagę na szczegółowym zbadaniu wpływu wybranych typów modeli, opisujących współczynnik oporu przepływu oraz współczynnik przejmowania ciepła dla wrzenia w przepływie na korelację dla wrzenia w przepływie ( wyprowadzoną dla rur o konwencjonalnych wymiarach -półempiryczny model Mikielewicza ). Otrzymane wyniki porównano z danymi eksperymentalnymi.
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Quality of Satellite Communication in Selected Mobile Android Smartphones
PublicationToday, thanks to mobile devices, satellite communication is available to anyone and everywhere. Gaining information on one’s position using GNSS (Global Navigation Satellite Systems), particularly in unknown urban environments, had become an everyday activity. With the widespread of mobile devices, particularly smartphones, each person can obtain information considering his or her location anytime and everywhere. This paper is...