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Wyniki wyszukiwania dla: AFH
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Influence of Cement Replacement with Sewage Sludge Ash (SSA) on the Heat of Hydration of Cement Mortar
PublikacjaThe amount of fly ash from the incineration of sewage sludge is increasing all over the world, and its utilization is becoming a serious environmental problem. In the study, a type of sewage sludge ash (SSA) collected directly from the municipal sewage treatment plant was used. Five levels of cement replacement (2.5%, 5%, 7.5%, 10% and 20%) and unchanged water-to-binder (w/b) ratio (0.55) were used. The purpose of the study was...
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Correlation between Compressive Strength and Heat of Hydration of Cement Mortars with Siliceous Fly Ash
PublikacjaThis paper presents the results of calorimetric and strength tests of mortars with ordinary Portland cement and two substitution rates (10 and 20%) of cement by siliceous fly ash. The prepared samples were cured under isothermal conditions at four different temperatures: 23, 33, 43 and 53 °C. Heat of hydration was measured using an isothermal calorimeter dedicated to monitor the hydration process of cementitious composites such...
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Airstrip Ground Improvement Works by Blasting Charge Technique and Dredged-Ash Material Mixture
PublikacjaSoil improvement by blasting charge technique is known in geotechnics as one of the efficient and inexpensive method. It can be used in preparing of underground to found road construction and buildings as well. The technique proves usefulness especially when dynamic load is applied. It is because of non-stiff or rather resilient type soil after improvement. In noncohesive or organic soil, blasting charge...
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AF w chorobach genetycznie uwarunkowanych
PublikacjaIstnieje opinia, że genetyczne podłoże migotania przedsionków nie jest częste, jednak aby to ocenić konieczne są systematyczne badania. W każdej grupie wiekowej mają prawdopodobnie znacznie mniej lub bardziej wyrażone uwarunkowania genetyczne. Migotanie nierzadko, w różnym czasie, pojawia się jako objaw /powikłanie genetycznie uwarunkowanych chorób serca.W rozdziale opisane są: zespół długiego QT, zespół krótkiego QT, zespół Burgady,...
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Heavy Metals and Metalloids Leachability from Composite Ground Materials Peat – Fly Ash – Lime
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Temporal sequence of the human RBCs' vesiculation observed in nano-scale with application of AFM and complementary techniques
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A comparative study on geopolymers synthesized by different classes of fly ash after exposure to elevated temperatures
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Assessment of copper surface coverage with corrosion inhibitor using AFM-based local electrical measurements
PublikacjaThe paper presents a new method of assessment of metal surface coverage with corrosion inhibitor and thus of inhibitor protective performance. It is based on the atomic force microscopy measurement performed in a contact mode. Apart from topography images the proposed approach allows acquisition of local DC maps and local electrical impedance spectra via application of DC bias voltage or AC perturbation signal between the conductive...
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Challenges and opportunities related to the use of sewage sludge ash in cement-based building materials – A review
PublikacjaDue to the increasingly demanding legal regulations, regarding both sewage sludge (SS) and solid residues obtained during its thermal utilization processes, new solutions to limit their negative impact on the environment are sought. One approach that eliminates the risk of sewage sludge ash (SSA) is its use in cement building materials. The article contains a detailed literature review regarding the use of SSA in mortars and concretes,...
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The role of additives in improving the flammability and calorific value of leather shavings and the binding of chromium compounds in ash
PublikacjaLeather processing companies are struggling with the problem of increasing costs of post-production waste disposal. Therefore, the issue of thermal waste disposal at the plant and the use of generated heat in the production process is becoming more and more popular. Leather waste on its own does not allow for autothermal combustion despite the sufficient higher heating value (HHV). Therefore the Authors proposed to improve the...
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Lightweight alkali-activated composites containing sintered fly ash aggregate and various amounts of silica aerogel
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Investigation of morphological and electrical properties of the PMMA coating upon exposure to UV irradiation based on AFM studies
PublikacjaCelem badania było określenie wpływu promieniowania ultrafioletowego na morfologię powierzchni powłoki i na jej właściwości elektryczne. Cienka powłoka z polimetakrylanu metylu została nałożona na podłoże stalowe metodą zanurzeniową. Oceny stanu przed ekspozycją UV i w jej trakcie dokonywano przy użyciu mikroskopu sił atomowych. Na obrazach AFM zaobserwowano pojawienie się mikropęknięć. Celem zweryfikowania czy wykryte nieciągłości...
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Palm Oil Fuel Ash-Based Eco-Efficient Concrete: A Critical Review of the Short-Term Properties
PublikacjaThe huge demand for concrete is predicted to upsurge due to rapid construction developments. Environmental worries regarding the large amounts of carbon dioxide emanations from cement production have resulted in new ideas to develop supplemental cementing materials, aiming to decrease the cement volume required for making concrete. Palm-oil-fuel-ash (POFA) is an industrial byproduct derived from palm oil waste’s incineration in...
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Comparative Analysis of Laboratory-Made and Industrial-Made Sewage Sludge Ash: Implications for Effective Management Strategy Development
Publikacjafirst_pageDownload PDFsettingsOrder Article Reprints Open AccessArticle Comparative Analysis of Laboratory-Made and Industrial-Made Sewage Sludge Ash: Implications for Effective Management Strategy Development by Bartłomiej Michał Cieślik 1,*ORCID,Oskar Ronda 1ORCID,Elżbieta Grządka 2ORCID,Jolanta Orzeł 2 andJustyna Płotka-Wasylka 1 1 Department of Analytical Chemistry, Faculty of Chemistry, Gdańsk University of Technology, Gabriela...
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Determination of metal content in sewage sludge and sewage sludge ash to find opportunities to use them in the construction industry
PublikacjaSewage sludge management is becoming an increasing problem in developed and developing countries. Due to their physicochemical properties (mainly high content of heavy metals) a safe method of utilization is sought. Considering environmental protection, energy recycling, reduction in use of the raw materials and the possibility of immobilization hazardous substances, the use of ashes in building materials becomes a very good way...
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Evaluation of adhesive forces and the specific surface energy of zirconia stabilized by yttria with alumina additions ceramic by AFM method
PublikacjaThe adhesive forces and the specific surface energy of ceramic material surfaces are very important for further tribological and biomedical applications of ceramics. Partially stabilized zirconia (zirconium oxide) is popular for manufacturing various medical products. ZrO2 stabilized by Y2O3 with additions of 5 wt% alumina was produced by slip casting method with a subsequent sintering. Structure and chemical composition of ceramic...
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Predicting Performance of Lightweight Concrete with Granulated Expanded Glass and Ash Aggregate by Means of Using Artificial Neural Networks
PublikacjaLightweight concrete (LWC) is a group of cement composites of the defined physical, mechanical, and chemical performance. The methods of designing the composition of LWC with the assumed density and compressive strength are used most commonly. The purpose of using LWC is the reduction of the structure’s weight, as well as the reduction of thermal conductivity index. The highest possible strength, durability and low thermal conductivity...
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Sustainable recovery of plant essential Nitrogen and Phosphorus from human urine using industrial coal fly ash
PublikacjaCoal-based thermal power plants play a pivotal role in meeting global energy demand. The amount of fly ash generated from these plants increases every year, and its successful use has posed a significant environmental risk in the last decade. In this study, coal fly ash was packed in a fixed-bed adsorption column to remove Urea–N from synthetic human urine. To assess the efficacy of fly ash in the removal of Nitrogen, various process...
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Combustion characteristics and retention-emission of selenium during co-firing of torrefied biomass and its blends with high ash coal
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Electrical mapping of AISI 304 stainless steel subjected to intergranular corrosion performed by means of AFM-LIS in the contact mode
PublikacjaThe paper presents results of the AFM-based approach to local impedance spectroscopy (LIS) measurements performed in a 20 20 lm grid within an austenite grain–grain boundary region for sensitized AISI 304 stainless steel (SS). Maps of electrical parameters obtained on the basis of localized impedance spectra were demonstrated, presenting their changes and correlation with the sample topography. Performed research revealed significant...
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Integration of Fluorescent, NV-Rich Nanodiamond Particles with AFM Cantilevers by Focused Ion Beam for Hybrid Optical and Micromechanical Devices
PublikacjaIn this paper, a novel fabrication technology of atomic force microscopy (AFM) probes integrating cantilever tips with an NV-rich diamond particle is presented. Nanomanipulation techniques combined with the focused electron beam-induced deposition (FEBID) procedure were applied to position the NV-rich diamond particle on an AFM cantilever tip. Ultrasonic treatment of nanodiamond suspension was applied to reduce the size of diamond...
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Mechanics / AGH University of Science and Technology
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CP2015 – zmodyfikowana metodyka przewidywania hałasu powstającego na parkingach, stacjach paliw, MOP-ach i punktach poboru opłat
PublikacjaW przypadku przedsięwzięć „mogących zawsze lub potencjalnie znacząco oddziaływać na środowisko” pierwszą decyzją, którą należy uzyskać w ramach procedury inwestycyjnej, jest decyzja o środowiskowych uwarunkowaniach (w skrócie: decyzja środowiskowa, DŚU). Procedura związana z uzyskaniem DŚU została opisana w Ustawie z 3 października 2008 r. o udostępnianiu informacji o środowisku i jego ochronie, udziale społeczeństwa w ochronie...
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Water Needs of the Ash-Leaved Maple (Acer negundo L.) at the Period Over Three Years after Reclamation in Different Regions of Poland
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Evaluation of the potential of Microwave Plasma–Atomic Emission Spectrometry for trace elements leaching assessment from the concrete matrix with sewage sludge ash additives
PublikacjaThe management of ash generated during the thermal utilization of sewage sludge is a significant environmental problem requiring an effective technological solution. One alternative way to dispose of sewage sludge is to bind it in concrete as a substitute for part of the aggregate. The properties of the C-S-H phase enable effective immobilization of harmful substances that sewage sludge contains. The amount of individual compounds...
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Wsparcie rzeczywistości wirtualnej dla projektów realizowanych w ASP w Gdańsku / Virtual reality support for the projects carried out in the AFA in Gdańsk
PublikacjaLaboratorium Zanurzonej Wizualizacji Przestrzennej (LZWP) jest unikatowym w skali kraju miejscem, gdzie w grupie kilku osób można wspólnie eksplorować świat iluzji. Na takie doświadczenie pozwalają znajdujące się tam jaskinie rzeczywistości wirtualnej (ang. Cave Automatic Virtual Environment, CAVE) umożliwiające uczestnikom eksperymentu wniknięcie w środowisko zarówno kreowane komputerowo, jak i stanowiące cyfrową kopię realnego...
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Exemplary AFM application in cosmetology
Dane BadawczeAtomic force microscopy can be used in the diagnosis of the condition of human tissues such as skin, nails and hair. This is obviously related to the use of a variety of cosmetic products and can be understood as an attempt to assess their long-term impact on human appearance and health. An example may be the studies presented in [1] indicating the...
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Colvolutional calibration of AFM probe
Dane BadawczeAtomic force microscopy is based on the interaction of the examined surface with a probe of a pyramidal shape, tipped with a sharp end with a radius of curvature ranging from single nanometers to hundreds of nanometers. The resolution of the obtained image is of course dependent on the above-mentioned geometric size, and the resulting image is a convolutional...
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Synergistic effects of biochar and processed fly ash on bioavailability, transformation and accumulation of heavy metals by maize (Zea mays L.) in coal-mining contaminated soil
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The effect of thermal modification of ash wood on granularity and homogeneity of sawdust in the sawing process on a sash gang saw PRW 15-M in view of its technological usefulness
PublikacjaPrzedstawiono wyniki analiz granulometrycznych trocin, drewna jesionowego niemodyfikowanego (Fraxinus exelsior L.) i modyfikowanego termicznie, otrzymanych w procesie przecinania drewna na pilarce ramowej wielopiłowej PRW15-M. Przecinanie drewna prowadzono dla dwu prędkości posuwu 0,36 m·min-1 oraz 1,67 m·min-1. Ziarnistośćpowstających trocin dla drewna jesionowego modyfikowanego termicznie zawierała się w przedziale od 33,5 μm...
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Statistics of AFM current-voltage curves
Dane BadawczeMapping surface electrical conductivity offers enormous cognitive possibilities regarding the structure and properties of modern materials. The technique invented for this purpose (Conductive AFM) by Murrel's team and colleagues allows independent monitoring of the local conductivity of materials in correlation with the topographic profile. The mentioned...
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Examples of AFM applications in liquid environment
Dane BadawczeImportant advantage of atomic force microscopy (also tunneling microscopy) is the ability to work in different environments (vacuum, controlled atmosphere, liquid environment). The last one, open interesting possibilities, such as imaging of delicate biological materials in their natural state. The use of electrochemical mode allows for the modification...
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The AFM micrographs of V2O5 single crystals
Dane BadawczeThe DataSet contains the atomic force microscope images of the surface of V2O5 single crystals. The thin films were obtained by the sol-gel method. The information about sol synthesis is described in the Journal of Nanomaterials. The As-prepared films were deposited on a quartz glass substrate and were annealing at 600°C under synthetic air.
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Surface characteristics of glass fibres covered with an aluminum layer after a chemical modification process using secondary ion mass spectrometry (SIMS) and atomic force microscopy (AFM)
PublikacjaPrzedstawiono wyniki z badań powierzchni modyfikowanych włókien szklanych (przed i po procesie chemicznej modyfikacji ich powierzchni), które są kandydatem na przyszły oryginalny bezmatrycowy materiał odniesienia lotnych analitów etenu (C2H4) metodami spektrometrii mas jonów wtórnych oraz mikroskopii sił atomowych. Badania miały na celu obserwację zmian oraz procesów, jakie zaszły na powierzchni włókien szklanych pokrytych...
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Fingerprint structure studies with semi-contact AFM
Dane BadawczeThe work [1] presents many, sometimes even surprising examples of the use of atomic force microscopy in modern forensics. Some of them are projectile tests using the characteristic scratch patterns created by the firing pin on the primer. There are more and more suggestions in the literature for the use of atomic force microscopy in dactyloscopy [2]....
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Destruction of AFM probes during normal operation
Dane BadawczeThe quality of the images obtained with the use of an atomic force microscope is determined by the state of the blade interacting with the tested material. Image artifacts can be generated by various reasons, such as oxidation, contamination or an error in blade fabrication, but also appear as a result of the repeated scanning process and inevitable...
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The AFM micrographs of gold nanoparticles on silicon substrate
Dane BadawczeThe 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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AFM investigation of electrode fabricated by 3D printing
Dane Badawcze3D printing, also known as additive manufacturing, has enjoyed great interest in recent years due to the versatility of this method of producing various shapes and details. Due to the possibility of precise control of the shape and composition of the printed elements, the discussed technique can be widely used in electrochemistry, including electrochemical...
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Nanostructures fabrication with use of electrical AFM litography
Dane BadawczeIn the last 10 years, one of the nanotechnological trends has been observed, consisting in the development of new variants of computer memory systems with high capacity and speed of access, using quantum dots. One of the techniques for creating nanodots and other nanostructures is based on the use of an atomic force microscope acting as a lithographic...
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AFM analysis of duplex steel structure and composition
Dane BadawczeDue to the high content of alloying elements, duplex stainless steels are characterized by a complex structure of phase transitions. Among all types of intermetallic compounds, the sigma phase is of major interest due to its detrimental effect on both mechanical properties and corrosion behavior. It is an intermetallic phase enriched in Cr and Mo and...
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AFM visualization of Mg alloy surface modification
Dane BadawczeMagnesium alloys with additives improving their mechanical properties are valued as materials with low density and elasticity coefficient. Additionally, their biocompatibility and biodegradability make them interesting in prosthetic applications. However, the last of these features, valuable in medicine, contradicts the industrial needs for the described...
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Detection of the acoustic interferences during AFM operation
Dane BadawczeAtomic force microscopy is a particularly complicated surface imaging technique due to the large number of factors that affect the quality of the resulting images. They are obviously difficult and sometimes even impossible to control at the same time. One of such factors may even be the seismological location of the building or the influence of mechanical...
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Imaging of the effects of pitting corrosion with the use of AFM
Dane BadawczePitting corrosion is a local attack on a metal surface, limited to a point or small area, which appears as a hole. Pitting corrosion is one of the most harmful forms of corrosion due to the fact that it is associated with small, difficult to detect damage, that can even lead to perforation of the structure. A single pit may range in size from micrometers...
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AFM imaging of surface of modern soldering alloy
Dane BadawczeFollowing the announcement in 2006 of European Union directives aimed at limiting the use of lead in electronic products, there was an urgent need to use lead-free solders in the electronics industry. Due to production requirements, it is necessary to use solders with different melting points. To replace the low-melting eutectic Sn 37 wt. Pb, the most...
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AFM and SSRM investiagtion of carbon nanowalls properties
Dane BadawczeStructures with limited dimensionality are of great interest in modern nanotechnology. The properties of these objects are used, among others, for the construction of modern displays or as a base for quantum computers. Carbon nanowalls, which are the subject of the imaging results contained in this collection, are also considered interesting building...
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Does GISSI-AF change the concept of using RAS inhibitors in the primary prevention of atrial fibrillation in hypertensive patients?
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eLearning im Wandel der Zeit am Beispiel der TU Gdansk und der FH Flensburg
PublikacjaW referacie omówiono zmiany systemów eLearning na przykładzie ich rozwoju na Politechnice Gdańskiej i w Wyższej Szkole Zawodowej we Flensburgu. Dokonano analizy pierwszych rozwiązań, w tym własnych systemów i narzędzi, jak również dokonanego na obu uczelniach zwrotu w kierunku otwartych systemów LMS. Podkreślono rolę oceny jakości(QoS) systemów zdalnego nauczania.
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Imaging of graphene surface by means of tapping mode AFM
Dane BadawczeGraphene [1] is a material consisting of carbon planes with a hexagonal structure. One of the facts of interest from a purely scientific point of view is the very high mobility of electrons in the described material, allowing the study of relativistic effects inside a solid sample. Other features, such as bactericidal activity, make graphene an interesting...
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The AFM micrographs of isotropic etching silicon substrates (111)
Dane BadawczeThe DataSet contains the atomic force microscope images of isotropic etching silicon substrates (111). The silicon wafers were etched in a mixture of nitric acid, hydrofluoric acid, and acetic acid in the ratio of 40:1:15. The soaking time for the substrates was from 20 to 90 seconds
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The influence of external interference on AFM imaging, the use of a protective helmet
Dane BadawczeThis collection is of purely practical importance, showing how the presence of external disturbances can adversely affect the quality of imaging with an atomic force microscope. For this reason, it is also advisable to provide a link to a workshop-like study [1] as well as a huge number of commercial solutions available after entering the keyword "AFM...