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UV-Light-Induced Fluctuation Enhanced Sensing by WO3-Based Gas Sensors
PublikacjaWO3-based gas sensors were investigated under UV-light irradiation and at different working temperatures with the object of achieving superior sensitivity and selectivity. Resistance fluctuations in the WO3 layer were studied together with dc resistance measurements. The data were taken in synthetic air, ethanol, nitrogen dioxide, and mixtures of these gases. We conclude that UV irradiation can easily be applied to enhance the...
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Enhanced gas sensing by graphene-silicon Schottky diodes under UV irradiation
PublikacjaThe effect of ultraviolet (UV) or blue irradiation on graphene/n-doped silicon Schottky junctions toward gas sensing was investigated. Schottky diodes were subjected to oxidizing nitrogen dioxide (NO2, 1–3 ppm) and reducing tetrahydrofuran (THF, 50–200 ppm), showing significantly different responses observed on the currentvoltage (I-V) characteristics, especially under UV light (275 nm). NO2 affected the resistive part of the forward region...
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A Model for Risk Analysis of Oil Tankers
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Residual stress evaluation in oil pipeline.
PublikacjaPrzedstawiono metodę pomiaru rozkładu naprężeń w ropociągu z wykorzystaniem efektu Barkhausena. Opisano procedurę pomiaru oraz kalibracji metody. Wynik potwierdzono w jednym punkcie metodą Mathar´a
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Qualitative characteristics and comparison of volatile fraction of vodkas made from different botanical materials by comprehensive two-dimensional gas chromatography and the electronic nose based on the technology of ultra-fast gas chromatography
PublikacjaBACKGROUND Vodka is a spirit-based beverage made from ethyl alcohol of agricultural origin. At present, increasingly more vodka brands have labels that specify the botanical origin of the product. Until now, the techniques for distinguishing between vodkas of different botanical origin have been costly, time-consuming and insufficient for making a distinction between vodka produced from similar raw materials. Therefore, it is...
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Integration of inertial sensors and GPS system data for underwater navigation
PublikacjaThe Inertial Navigation System (INS) is usually employed to determine the position of an underwater vehicles, like Remotely Operated Vehicles (ROV) and, more recently, Autonomous Underwater Vehicle (AUV). The accuracy of the position provided by the INS, which uses accelerometers and gyroscopes, deteriorates with time. An external aiding sources such as the Global Positioning System (GPS) can be employed to reduce the error growth...
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Electrical responses of nanoporous NiO films for light-activated nitrogen dioxide and acetone gas sensing
Dane BadawczeThe chemoresistive sensor response of nanoporous NiO films prepared by advanced gas deposition was investigated with and without simultaneous light irradiation, to detect nitrogen dioxide and acetone gases. The presented data show electrical responses presented as sensor resistance or relative changes in sensor resistance under selected environment...
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FTIR spectra of gas mixtures from the process of biogas dry reforming using CLO catalyst
Dane BadawczeThe dataset contains the FTIR spectra collected during the catalytic measurements of dry reforming of biogas (60/40 CH4-CO2) using Ce0.8La0.2O2 nanocatalyst. The specatra were collected every 1 minute.
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FTIR spectra of gas mixtures from the methanation chamber filled with 50-50wt.% NiO-Al2O3
Dane BadawczeThe dataset includes the FTIR spectra collection of the outlet gas mixtures (CO2, CO, CH4) from reactor chamber filled with 50/50 wt.% NiO-Al2O3 catalyst for perfoming methanation reaction. The inlet gas mixture was composed of 3:1 by vol. H2:CO. Spectra were collected using PerkinElmer FTIR every 1 min.
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FTIR spectra of gas mixtures from the methanation chamber filled with 25-75wt.% NiO-Al2O3
Dane BadawczeThe dataset includes the FTIR spectra collection of the outlet gas mixtures (CO2, CO, CH4) from reactor chamber filled with 25/75 wt.% NiO-Al2O3 catalyst for perfoming methanation reaction. The inlet gas mixture was composed of 3:1 by vol. H2:CO. Spectra were collected using PerkinElmer FTIR every 1 min.
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FTIR spectra of gas mixtures from the methanation chamber filled with 50-50wt.% NiO-GDC
Dane BadawczeThe dataset includes the FTIR spectra collection of the outlet gas mixtures (CO2, CO, CH4) from reactor chamber filled with 50/50 wt.% NiO-GDC (Gadolinia Doped Ceria 20mol.%Gd2O3) catalyst for perfoming methanation reaction. The inlet gas mixture was composed of 3:1 by vol. H2:CO. Spectra were collected using PerkinElmer FTIR every 1 min.
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Soil quality index applied to Cucurbit production (Chaco, Argentina)
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Total and mineralizable soil carbon as affected by tillage in the Argentinean Pampas
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Nickel in soil and water: Sources, biogeochemistry, and remediation using biochar
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Immobilization of Pb and Cu by organic and inorganic amendments in contaminated soil
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Soil and groundwater contamination as a result of sewage sludge land application
PublikacjaThe leaching of chemical compounds (N-NO3, N-NH4, Norg, P-PO4, Ptot) and trace elements (Cd, Cu, Cr, Ni, Zn, and Pb) from sewage sludge and their migration through the soil profile was the subject of the study. The column experiments were carried out under atmospheric conditions corresponding to naturally occurring storm events - sewage sludge amended soil was irrigated with high rates of water. The column filter media used in...
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The analysis of soil resistance during screw displacement pile installation
PublikacjaThe analysis of soil resistances during screw displacement pile installation based on model and field tests. The investigations were carried out as a part of research project, financed by the Polish Ministry of Science and Higher Education. A proposal of empirical method for prediction of rotation resistance (torque) during screw auger penetration in non-cohesive subsoil based on CPT result.
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Coil Design for Wireless Power Transfer with Series-Parallel Compensation
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Tests of soil-geotextile systems in changeable hydraulic head conditions.
PublikacjaArtykuł zawiera opis stanowiska badawczego i przeprowadzonych badań filtracji w układzie grunt-geowłóknina w kierunku normalnym do płaszczyzny geosyntetyku.
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Influence of stress on oxidation behaviour of carbon steel studded coil.
PublikacjaAnalizowano awarię wężownicy kołkowej ze stali węglowej pracującej przez 10 lat w środowisku przegrzanej pary w temperaturze 290ºC i ciśnieniu 0,67 MPa. Obserwacje mikroskopowe powierzchni i przekroju rury ukazały drobne pęknięcia w ściance wynikające z procesu selektywnego utleniania. Zastosowano metodę elementów skończonych w celu ustalenia zależności postępu korozji od ciśnienia i obciążenia cieplnego.
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BADANIA MATERIAŁOWE USZKODZONEJ RURY COIL TUBING RISERA Z1
PublikacjaW ramach ekspertyzy wykonano analizę materiałową i określono przyczyny uszkodzenia rury risera wody zatłaczającej.
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Geotechnical Aspects of Dike Construction Using Soil-Ash Composites
PublikacjaAn analysis of using of anthropogenic materials, mainly ashes from Coal Combustion Products (CCP), for dike construction is shown. Perspectives of anthropogenic materials application in geotechnical engineering and their advantages in sense of the carbon dioxide reduction are discussed. According to regulations of Kioto Protocol 2005 and EU agreement “Energy Roadmap 2050” recycled materials have higher usage priority than natural...
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The effect of surfactant composition on solubilization and emulsification of hydrophobic soil pollutants
PublikacjaZbadano solubilizację tetrachloroetylenu i dichlorobenzenu w roztworach surfaktantów niejonowych (oksyetylenowanych alkoholi tłuszczowych i alkilofenoli) oraz w roztworach biosurfaktantu (mono i diramnolipidów). Obserwowano liniowy wzrost ilości zsolubilizowanych związków ze wzrostem stężenia surfaktantu w roztworze. Solubilizacja tetrachloroetylenu przebiegała ze znacznie większą efektywnością niż solubilizacja dichlorobenzenu....
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Comparison of effect of fungicides with fenpropidin and picoxystrobin on phosphatase activities in soil
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Soil contamination with geohelminths in children’s play areas in Szczecin, Poland
PublikacjaThe presence of invasive forms of parasites in the soil represents a potential threat to public health, especially for children. The aim of the study was to determine the degree of contamination with geohelminth eggs of soil samples collected from sandpits and playgrounds in the Szczecin area. The findings showed overall prevalence of soil samples contaminated with geohelminth eggs in the soil and sand...
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Mechanical Properties of a Dike Formed from a Soil-ash Composite
PublikacjaThe paper presents the research results on application of composite soils for dike construction. The composite soil is produced by mixing bottom ash (by-product of energetics) with dredged material (sand) taken from the mouth of The Vistula river. The optimum composite for dike core was chosen with respect to mechanical parameters: high internal friction angle, good compaction and reduced hydraulic conductivity. The test dike was...
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Application of soil nailing technique for protection and preservation historical buildings
PublikacjaSoil nailing is one of the recent in situ techniques used for soil improvement and in stabilizing slopes. The process of soil nailing consists of reinforcing the natural ground with relatively small steel bars or metal rods, grouted in the pre-drilled holes. This method has a wide range of applications for stabilizing deep excavations and steep slopes. Soil nailing has recently become a very common method of slope stabilisation...
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Experimental Investigation of Prototype Water-Lubricated Compliant Foil Bearings
PublikacjaPraca zawiera wyniki badań doświadczalnych prototypowego łożyska foliowego smarowanego wodą. Łożyska tego typu mogą mieć zastosowanie w węzłach, od których wymaga się ekologicznego środka smarowego, np. pompy wodne czy turbiny wodne. W opracowaniu zademonstrowano wyniki badań trzech prototypowych poprzecznych łożysk foliowych. Opisano napotkane problemy badań oraz wprowadzonych do konstrukcji łożyska zmian, których celem była poprawa...
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HEAT TRANSFER CHARACTERISTICS OF ENHANCED SHELL AND COIL HEAT EXCHANGER
PublikacjaIn the paper authors presented their own constructions of shell and tube heat exchangers with intensified heat transfer. The shell and coils heat exchangers are in common use in heat ventilations and air conditioning systems. Those types of recuperators are quite simple constructions, the low value of pressure drops and good conditions of heat transfer. The present study shows an experimental investigation of the heat transfer...
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Susceptibility to Degradation in Soil of Branched Polyesterurethane Blends with Polylactide and Starch
PublikacjaA very important method of reducing the amount of polymer waste in the environment is the introduction to the market of polymers susceptible to degradation under the influence of environmental factors. This paper presents the results of testing the susceptibility to degradation in soil of branched polyesterurethane (PUR) based on poly([R,S]-3-hydroxybutyrate) (R,S-PHB), modified with poly([D,L]-lactide) (PLA) and starch (St). Weight...
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Deterioration and Protection of Concrete Elements Embedded in Contaminated Soil: A Review
PublikacjaCoating materials are considered one of the most antique materials of human civilization; they have been used for decoration and the protection of surfaces for millennia. Concrete structures—due to their permanent exposure to different types of environments and contaminants—require the use of coatings that contribute to its preservation by reducing the corrosion of its components (steel and aggregates). This article intends to...
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Spectroscopic Optical Coherence Tomography for Thin Layer and Foil Measurements
PublikacjaThe main goal of this research was to assess if it is possible to evaluate the thickness of thin layers (both thin films on the surface and thin layers below the surface of the tested object) and foils using optical coherence tomography (OCT) for thickness assessment under the resolution of the standard commercially available OCT measurement system. In the proposed solution, light backscattered from the evaluated thin layer has...
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Refinement of the Hardening Soil model within the small strain range
PublikacjaThe popularity of the elasto-plastic Hardening Soil (HS) model is based on simple parameter identification from standard testing and empirical formulas. The HS model is implemented in many commercial FE codes designed to analyse geotechnical problems. In its basic version, the stress–strain behaviour within the elastic range is subject to the hypoelastic power law, which assures the barotropy of the elastic stiffness. However,...
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Experimental Investigations on the Influence of Coil Arrangement on Melting/Solidification Processes
PublikacjaThe latent heat thermal energy storage units are very popular because of their high energy density and almost close to constant temperature during the charging/discharging. In the present study has been proposed new shell-and-coil geometry with a shifted coil position to enhance the performance of phase change thermal magazine. The experimental investigations have been performed both for the melting and solidification process of...
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Settlement of a historic building due to seepage-induced soil deformation
PublikacjaThe research paper reviews issues associated with the impact of groundwater flow on soil characteristics and parameters, hence, the entire structure of a building set on it. Water seepage through the ground, building subsoil or structural elements of buildings made of soil affects the soil skeleton and may lead to changes in the arrangement of individual grains relative to each other, i.e., a modified soil structure. Soil solid...
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Effect of soil on the capacity of viscous dampers between adjacent buildings
PublikacjaThis study investigated the seismic pounding of two adjacent buildings considering soil–structure interaction (SSI). A comprehensive parametric study of buildings with different heights was performed to reveal the pounding-involved behaviour considering the soil effect. Wavelet transform has been conducted to gain insight into the differences in the frequency contents of the impact forces between fixed- and flexible-base adjacent...
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Balal Yousaf Dr.
OsobyBalal Yousaf currently works as a Professor at the Silesian University of Technology, Gliwice, Poland. He has an academic background in Environmental Geochemistry & Pollution. His research interests include Soil and Water Remediation, Transformation Mechanism and Fate of Environmental Contaminants, Minerals Interaction with Environmental Contaminants, Green Synthesis, Biowaste Conversion, Bioenergy and Environmental Pollution...
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On the possible increasing of efficiency of ship power plant with the system combined of marine diesel engine, gas turbine and steam turbine in case of main engine cooperation with the gas turbine fed in parallel and the steam turbine
PublikacjaW pracy przedstawiono koncepcję układu kombinowanego okrętowego dużej mocy złożonego z wiodącego silnika głównego spalinowego silnika tłokowego i skojarzonych z nim turbiny gazowej mocy i układu turbiny parowej, wykorzystujących energię zawartą w spalinach wylotowych głównego silnika spalinowego. Rozpatrzono wariant układu kombinowanego, w którym główny jest silnik tłokowy skojarzony z turbiną gazową mocy i układem turbiny parowej,...
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On the possible increasing of efficiency of ship power plant with the system combined of marine diesel engine, gas turbine and steam turbine in case of main engine cooperation with the gas turbine fed in series and the steam turbine
PublikacjaW pracy przedstawiono koncepcję układu kombinowanego okrętowego dużej mocy złożonego z wiodącego silnika głównego silnika spalinowego tłokowego oraz skojarzonych z nim turbiny gazowej mocy i układu turbiny parowej, wykorzystujących energię zawartą w spalinach wylotowych silnika spalinowego. Rozpatrywano wariant układu kombinowanego, którym turbina mocy jest zasilana szeregowo spalinami wylotowymi. Podano algorytm i obliczenia...
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ChemInform Abstract: Modern Methods of Thermochemical Biomass Conversion into Gas, Liquid and Solid Fuels
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Use of Impedance Spectroscopy to Characterize Lining Performance in Simulated Flue Gas Desulfurization Systems
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Application of static headspace gas chromatography for routine analysis of VFAs in cattle farm wastewater
PublikacjaOznaczanie lotnych kwasów tłuszczowych w próbkach środowiskowych jest tematem coraz powszechniej analizowanym z uwagi na ich uciążliwość w środowisku. Celem pracy było wykorzystanie techniki statycznej analizy headspace (HS) w połączeniu z analizą chromatograficzną do oznaczania lotnych kwasów monokarboksylowych w wodnych próbkach środowiskowych pochodzących z hodowli bydła.
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Comprehensive two-dimensional gas chromatography-mass spectrometry: Recent evolution and current trends
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Analysis of essential oils through comprehensive two-dimensional gas chromatography: General utility
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Standing Acoustic Waves and Relative Nonlinear Phenomena in a Vibrationally Relaxing Gas-Filled Resonator
PublikacjaStanding acoustic waves in one-dimensional resonator filled with vibrationally relaxing gas, are studied. Two regimes of excitation of molecular vibrational degrees of freedom are considered, equilibrium and nonequilibrium. The acoustic energy enlarges with time in the non-equilibrium regime and decreases otherwise before formation of discontinuity. After that, it decreases due to nonlinear absorption and tends to zero in equilibrium...
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Trust in the source of received information as a factor related to public perception of shale gas drilling
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Review of Small Gas Turbine Engines and Their Adaptation for Automotive Waste Heat Recovery Systems
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Reliability of flue gas desulphurisation installations - the essential condition of efficient air pollution control
PublikacjaW celu minimalizacji niekorzystnego wpływu SO2 i SO3 na środowisko naturalne w wielu instalacjach skrubery odsiarczające gaz spalinowy (FGD) stosowane są do usuwania tlenków siarki z gazów wylotowych. Ostre warunki pracy skruberów i dodatkowego osprzętu powodują problemy korozyjne w powszechnie stosowanych materiałach konstrukcyjnych a awarie wywierają długookresowy wpływ na środowisko. Opisano najnowsze doświadczenia związane...
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High temperature air/steam gasification of biomass in view of hydrogen rich gas production.
PublikacjaArtykuł przedstawia opis nowej i zaawansowanej metody konwersji termochemicznej biomasy i miejskich odpadów stałych w paliwo gazowe, bogate w wodór. W porównaniu z tradycyjnym procesem gazyfikacji, w metodzie tej wykorzystuje się powietrze/parę wodną przegrzane do wysokiej temperatury (powyżej 1300 st. C). Przegrzanie powietrza lub pary wodnej odbywa się z zastosowaniem ceramicznego przegrzewacza wysokotemperaturowego. W celu...
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Hydrogen rich gas production from high temperature air/steam gasification of biomass
PublikacjaW pracy przedstawiono nowoczesną technikę konwersji biomasy oraz stałych odpadów komunalnych w celu produkcji paliwa gazowego bogatego w wodór. Opisany proces gazyfikacji przebiega w wysokiej temperaturze przy obniżonej koncentracji tlenu i udziale pary wodnej. Dzięki temu możliwa jest produkcja gazów palnych, w szczególności H2, który można wykorzystać do produkcji energii elektrycznej i cieplnej.