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Wyniki wyszukiwania dla: MIB
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Modelling long-term technological transition of Polish power system using MARKAL: Emission trade impact
PublikacjaThe need for technological transition of electricity production becomes a global problem. However, in coal-dominated Polish power system this need is even more crucial than anywhere, since technical lifetime of the most domestic power plants is ending. In this paper, the impact of the EU Emission Trading Scheme (EU ETS) for CO2 combined with sulfur dioxide (SO2) and nitrogen oxides (NOx) emission trading mechanism on power technology...
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Charakterystyki naprężeniowe stali x20
PublikacjaBadano wpływ naprężeń na natężenie efektu Barkhausena w próbkach stali X20 (X20CrMoV12.1) poddanych obróbce cieplnej mającej obniżyć poziom naprężeń wewnętrznych. Trzy serie próbek stali X20 wygrzewano w temperaturach 720 0C, 750 0C i 780 0C przez czas 15, 30, 60, 120 i 240 min. Badano również twardość Vickersa. Wpływ naprężeń na natężenie efektu Barkhausena badano metodą uginania belki. Wygrzewanie w dwóch niższych temperaturach...
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Modeling of Surface Roughness in Honing Processes by UsingFuzzy Artificial Neural Networks
PublikacjaHoning processes are abrasive machining processes which are commonly employed to improve the surface of manufactured parts such as hydraulic or combustion engine cylinders. These processes can be employed to obtain a cross-hatched pattern on the internal surfaces of cylinders. In this present study, fuzzy artificial neural networks are employed for modeling surface roughness parameters obtained in finishing honing operations. As...
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Molecularly imprinted polymers for the detection of volatile biomarkers
PublikacjaIn the field of cancer detection, the development of affordable, quick, and user-friendly sensors capable of detecting various cancer biomarkers, including those for lung cancer (LC), holds utmost significance. Sensors are expected to play a crucial role in the early-stage diagnosis of various diseases. Among the range of options, sensors emerge as particularly appealing for the diagnosis of various diseases, owing to their cost-effectiveness,...
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High-performance activation of ozone by sonocavitation for BTEX degradation in water
PublikacjaThis work presents a novel advanced oxidation process (AOP) for degradation of emerging organic pollutants – benzene, toluene, ethylbenzene and xylenes (BTEXs) in water. A comparative study was performed for sonocavitation assisted ozonation under 40–120 kHz and 80–200 kHz dual frequency ultrasounds (DFUS). Based on the obtained results, the combination of 40–120 kHz i.e., low-frequency US (LFDUS) with O3 exhibited excellent oxidation...
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Molecular Imaging and Nanotechnology—Emerging Tools in Diagnostics and Therapy
PublikacjaPersonalized medicine is emerging as a new goal in the diagnosis and treatment of diseases. This approach aims to establish differences between patients suffering from the same disease, which allows to choose the most effective treatment. Molecular imaging (MI) enables advanced insight into molecule interactions and disease pathology, improving the process of diagnosis and therapy and, for that reason, plays a crucial role in personalized...
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MRM–MS of marker peptides and their abundance as a tool for authentication of meat species and meat cuts in single-cut meat products
PublikacjaThe abundance of protein markers in different types of meat cuts was explored in the context of authentication of raw meat (pork, beef and chicken) and processed meat products. Peptides originating from myoglobin (Mb) and myosin (My) were analyzed using multiple reaction monitoring mass spectrometry (MRM–MS). Analytical protocol was optimized for good repeatability (CV < 10%) and high sensitivity. The MS signal intensity of Mb...
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Essential oils as potential anti-staphylococcal agents
PublikacjaAntibiotic therapy of staphylococcal mastitis is characterized by significantly lower cure rates compared to infections caused by other microorganisms. Thus, it is necessary to search for new, alternative, non-antibiotic agents that are effective in the eradication of these bacteria. The aim of our research was to investigate the antimicrobial, especially anti-staphylococcal potential of a large collection (n=36) of essential oils...
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A general approach towards carbonization of plastic waste into a well-designed 3D porous carbon framework for super lithium-ion batteries
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Synthesis of Polylysine/Silica Hybrids through Branched-Polylysine-Mediated Biosilicification
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Sustainable polylysine conversion to nitrogen‐containing porous carbon flakes: Potential application in supercapacitors
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Branched Poly(l-lysine)-Derived Nitrogen-Containing Porous Carbon Flake as the Metal-Free Electrocatalyst toward Efficient Oxygen Reduction Reaction
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From polystyrene waste to porous carbon flake and potential application in supercapacitor
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Sustainable recycling of waste polystyrene into hierarchical porous carbon nanosheets with potential applications in supercapacitors
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Reactive construction of catalytic carbonization system in PP/C60/Ni(OH)2 nanocomposites for simultaneously improving thermal stability, flame retardancy and mechanical properties
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Effect of the Relative Position of the Face Milling Tool towards the Workpiece on Machined Surface Roughness and Milling Dynamics
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Improvement of machinability of Ti and its alloys using cooling-lubrication techniques: a review and future prospect
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Metrological analysis of surface quality aspects in minimum quantity cooling lubrication
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Formation of High Corrosion Resistant Nanotubular Layers on TitaniumAlloy Ti13Nb13Zr
PublikacjaThis paper presents results of oxidation tests and corrosion investigations of titanium alloy Ti13Nb13Zr performed at different conditions. The oxide layers have been formed by electrochemical method in 2M H3PO4 + 0.3% HF solution for 30 min. and 1 h at 20 V constantvoltage. The corrosion tests have been made by potentiodynamic method in Ringer`s solution at pH ranged between 3 and 7. It has been shown that the nano-oxide films,...
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Effects of Xanthan Gum Biopolymer on the Permeability, Odometer, Unconfined Compressive and Triaxial Shear Behavior of a Sand
PublikacjaBiopolymers, which are microbially induced polymers, can be used as an alternative material to improve engineering performance of soils. In this paper, a laboratory study of 0.075-1.0 mm size sand and biopolymer (i.e., xanthan gum) mixtures with various mix ratios (0%, 0.5%, 1.0%, and 1.5%) was performed. The materials, specimen preparation, and test methods are described, as are the results of a suite of permeability, odometer, unconfined...
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Formation of High Corrosion Resistant Nanotubular Layers on TitaniumAlloy Ti13Nb13Zr
PublikacjaThis paper presents results of oxidation tests and corrosion investigations of titanium alloy Ti13Nb13Zr performed at different conditions. The oxide layers have been formed by electrochemical method in 2M H3PO4 + 0.3% HF solution for 30 min. and 1 h at 20 V constantvoltage. The corrosion tests have been made by potentiodynamic method in Ringer`s solution at pH ranged between 3 and 7. It has been shown that the nano-oxide films,...
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Preparation of nano-tubular oxide layers on titanium alloy Ti13Nb13Zr
PublikacjaThe article presents results of oxidation tests and corrosion investigations of titanium alloy Ti13Nb13Zr preformed at different conditions. The oxide layers have been formed using electrochemical method in 2M H3PO4 + 0,3% HF solution for 30 min. and 1h at 20V constant voltage. The corrosion tests heve been made with poteniodynamic method in Ringer's solution at pH ranged 3 and 7. It has been shown that the nano-oxide films, which...
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Architektura rozproszonego systemu udostępniającego wyniki numerycznych prognoz pogody
PublikacjaW artykule przedstawiono architekturę systemu udostępniania wyników numerycznych prognoz pogody do którego należą m.in. serwer, portal internetowy oraz mobilne aplikacje klienckie, które wizualizują na różne sposoby dane pogodowe pobrane z serwera. Oprogramowanie mobilne przeznaczone jest na najpopularniejsze platformy mobilne, czyli iOS (min. iPhone, iPad, iPod) oraz Android. Prototyp systemu funkcjonuje operacyjnie w ramach...
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Al203 sealing elements lapping
PublikacjaPrzedstawiono wyniki badań własnych wydajnosci docierania ceramiki Al203. Badano elementy uszczelniające na docierarce jednotarczowej o standardowym układzie kinematycznym. Określono wpływ wielkości mikroziaren węglika boru o numerze F400/17, F800/6.5 i F1200/3 oraz wartości nominalnego nacisku jednostkowego na ubytek materiału w czasie 15 i 20 min. Scharakteryzowano mechanizm usuwania naddatku przy docieraniu elementów ceramicznych....
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Launch of the Immersive 3D Visualization Laboratory
PublikacjaThe paper presents the concept of Immersive 3D Visualization Laboratory, formed at the Faculty of Electronics, Telecommunications and Informatics at Gdańsk University of Technology under the project Gdańsk University of Technology's Modern auditoriums. The basic unit of this laboratory will be cubic CAVE (Cave Automatic Virtual Environment) enriched with spherical walk simulator. This device will allow the user unlimited walking,...
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Zmęczeniowe badania porównawcze złączy spawanych stopów aluminium Al-Mg5083 oraz Al-Zn-Mg 7010
PublikacjaBadaniom zmęczeniowym poddano stopy aluminium do przeróbki plastycznej Al-Mg5083 w stanie T6-przesyconym, a następnie sztucznie starzonym oraz stop Al-Zn-Mg 7010 w stanie H321 umocnionym zgniotem i stabilizowanym. Doczołowe złącza spawane wykonano metodami MIG i TIG. Na podstawie uzyskanych wyników badań opracowano zbiorcze wykresy niskocyklowej wytrzymałości zmęczeniowej. Wykazano, że stop Al-Mg 5083 ma wyższą niskocyklową wytrzymałość...
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Dark current characteristics of single crystalline silicon solar cells.
PublikacjaW pracy przedstawiono wpływ szkodliwych rezystancji na parametry pracy krzemowych ogniw fotowoltaicznych. W tym celu wyznaczono ciemne charakterystyki prądowo-napięciowe. W celu opisu własności elektrycznych ogniw zastosowano model jedno- i dwu-diodowy. Wyznaczono współczynniki nieidealności charakterystyki i rezystancję szeregową w całym zakresie temperatur pracy ogniw fotowoltaicznych dla zastosowań naziemnych. Wyznaczona za...
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Simultaneous detrmination of selected phenoxyacid herbicides and chlorophenols in surface and seawater by HPLC coupled to DAD.
PublikacjaDo badań wykorzystano metodę ekstrakcji do fazy stałej (SPE) w celu wzbogacenia analitów. Ekstrakty analizowano techniką wysokosprawnej chromatografii cieczowej (HPLC) z detekcją DAD. Opracowana metoda umożliwia oznaczenie 14 związków z grupy kwasów fenoksyoctowych i chlorofenoli w czasie 22 min. Odzysk analitów wynosił powyżej 60% dla fenoksykwasów i powyżej 70% w przypadku chlorofenoli. Granica oznaczalności dla oznaczania...
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Modified SPWM Technique with Zero-Sequence Voltage Injection for a Five-Phase, Three-Level NPC Inverter
PublikacjaThis article presents a modified sinusoidal pulse-width modulation (SPWM) scheme for a five-phase, three-level neutral-point-clamped inverter. The modulation scheme deploys a modified min–max function to inject the zero-sequence components into the reference modulating signals; hence enabling the effective utilization of the DC-link voltage. Balanced split-input DC-link voltages were achieved through further incorporation of adjustable...
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Minimising the Churn Out of the Service by Using a Fairness Mechanism
PublikacjaThe paper proposes an algorithm of bandwidth distribution, ensuring fairness to end-users in computer networks. The proposed algorithm divides users into satisfied and unsatisfied users. It provides fairness in terms of quality of experience (QoE) for satisfied users and quality of service (QoS) for unsatisfied users. In this paper, we present detailed comparisons relevant to service providers to show the advantages of the proposed...
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Damage Development on the Surface of Nickel Coating in the Initial Period of Erosion
PublikacjaThe common occurrence of the phenomenon of cavitation in many industries and the multitude of factors affecting the resistance to cavitation erosion of used materials contribute to the search for methods and appropriate parameters of coating application that are able to minimize the effects of erosion. To determine the validity of the developed application parameters and the method used, cavitation studies and microscopic observations...
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Evaluation of Wear Resistance of Ti alloys used for elements friction of knee endoprosthesis
PublikacjaThe paper presents research results of resistance to abrasive wear of titanium alloys: Ti6Al4V (commonly used) and Til3Nb13Zr (alloy of new generation) in association with polyethylene (UHMW-PE) predisposed for elements on pair of the knee endoprosthesis. The results were analysed from the point of possibility of an use of new generation titanium alloys as components of such implants. The tests of resistance to abrasive wear of...
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Testing A Novel Gesture-Based Mixing Interface
PublikacjaWith a digital audio workstation, in contrast to the traditional mouse-keyboard computer interface, hand gestures can be used to mix audio with eyes closed. Mixing with a visual representation of audio parameters during experiments led to broadening the panorama and a more intensive use of shelving equalizers. Listening tests proved that the use of hand gestures produces mixes that are aesthetically as good as those obtained using...
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Photocatalytic activity of TiO2 loaded with metal clusters
PublikacjaTiO2 modyfikowano powierzchniowo klasterami metali: srebra, złota i platyny. Zbadano wpływ rodzaju i ilości wprowadzonej domieszki, oraz matrycy TiO2 na aktywność fotokatalityczną otrzymanych próbek. Fotoaktywność próbek badano w reakcji degradacji fenolu (Co = 0,21 mmol/dm3 ) w zakresie światła Vis lub UV. Najwyższą aktywność zaobserwowano dla fotokatalizatorów zawierających 2%Ag, 1%Au oraz 0,5%Pt. Po 60 min naświetlania światłem...
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System detekcji miny morskiej oparty na układzie FPGA
PublikacjaObiekt metalowy znajdujący się w wodzie morskiej wytwarza wokół siebie pole elektryczne. Źródłem tego pola są procesy elektrochemiczne. Wśród wielu metalowych obiektów znajdujących się w morzu są miny morskie. Miny denne często ukryte są w dnie morza w celu utrudnienia ich wykrycia przez sonary. W pracy przedstawiono wyniki analizy numerycznej wpływu przewodności elektrycznej dna na rozkład pola elektrycznego oraz opisano system...
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Analiza lepko sprężysta wirnika promieniowego
PublikacjaAnalizie poddano wirnik wentylatora promieniowego z typoszeregu 405/315. Wentylator zaprojektowany jest w sposób poprawny; zgodny ze sztuką rzemieślniczą. W procesie projektowania posłużono się narzędziami inżynierskimi jak i analizą CSD. Wymagania Normowe do których należalo sie odnieść nie przewidują obciążeń od przejścia fali uderzeniowej. Wirnik wentylatora spełnia wymagania dla klasy F400, tzn. w czasie 120 min. pracy w temperaturze...
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Pre-oxidation of porous ferritic Fe22Cr alloys for lifespan extension at high-temperature
PublikacjaPre-oxidation of porous ferritic Fe22Cr alloys was extensively studied in this paper. Weight gain measurements and SEM analysis revealed that pre-oxidation performed at 900◦C for 40 min increased the lifespan of the alloy. A Cr evaporation study did not disclose any significant influence of the pre-oxidation process on the Cr content in the alloy. For a more detailed assessment, TEM imaging and X-ray tomography measurements of...
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Numeryczna analiza wpływu kierunku rozchodzenia się fali wybuchu na krzywiznę asymetrycznie walcowanego pasma Al-Cu. Numerical analysis the influence of the direction of explosion wave at the curvature of asymmetrical rolling of bimetallic plate.
PublikacjaW artykule przedstawiono numeryczną analizę wpływu kierunku rozchodzenia się fali wybuchu na krzywiznę asymetrycznie walcowanego pasma Al-Cu. Przeprowadzono symulacje dla procesu walcowania w temperaturze 20 C. Proces walcowania prowadzono w walcarce duo D 150 mm, o prędkości obwodowej 18,5 obr/min. Badania przeprowadzono dla dwóch stosunków grubości warstw 2/10 i 4/8. Symulację procesu przeprowadzono dla trzech gniotów 10%, 20%,...
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Polityka transportowa państwa.
PublikacjaMaterial tu przedstawiony jest syntezą projektu pt. ''Polityka Transportowa Państwa na lata 2005-2025'', opracowanego przez wielodyscyplinarny zespół specjalistów, który został powołany przez min. Ryszarda Krystka w październiku 2004. Projekt PTP został przyjęty przez kierownictwo Ministerstwa Infrastruktury w dniu 15 marca 2005 i skierowany do konsultacji środowiskowych i społecznych. Po zakończeniu konsultacji projekt będzie...
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Current status and future success of renewable energy in Pakistan
PublikacjaMismatch 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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Typing of Scopulariopsis and Microascus fungi by Random Amplified Polymorphic DNA (RAPD)
PublikacjaOBJECTIVES Scopulariopsis species and their teleomorphs of the genus Microascus are commonly isolated from soil, decaying plant material and indoor environments. Moreover, certain Scopulariopsis and Microascus species are recognised as opportunistic human pathogens. Although most species can be identified by detailed morphological study, phenotypic characters appear to overlap in several cases and morphology seems to be insufficient...
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Bimetallic Bi/Cu0-catalyzed persulfate-based advanced oxidation processes towards clofibric acid degradation in wastewater
PublikacjaClofibric acid (CFA), an important blood-lipid regulatory drug is an emerging organic pollutant and widely reported in water resources. A novel bimetallic, bismuth/zero valent cupper (Bi/Cu0) catalyst was prepared which showed better physiological, structural, and catalytic properties than Cu0. The Bi/Cu0 effectively catalyzed persulfate (S2O82−) and caused 85% degradation of CFA. The Bi coupling improved reusability and stability...
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Effect of Processing Parameters on Strength and Corrosion Resistance of Friction Stir-Welded AA6082
PublikacjaThe friction stir welding method is increasingly attracting interest in the railway sector due to its environmental friendliness, low cost, and ease of producing high-quality joints. Using aluminum alloys reduces the weight of structures, increasing their payload and reducing fuel consumption and running costs. The following paper presents studies on the microstructure, strength, and corrosion resistance of AA6082 aluminum alloy...
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Online Volatile Compound Emissions Analysis Using a Microchamber/Thermal Extractor Coupled to Proton Transfer Reaction-Mass Spectrometry
PublikacjaIndoor air is a complex and dynamic mixture comprising manifold volatile organic compounds (VOCs) that may cause physiological and/or psychological discomfort, depending on the nature of exposure. This technical note presents a novel approach to analyze VOC emissions by coupling a microchamber/thermal extractor (μ-CTE) system to a proton transfer reaction-mass spectrometer (PTR-MS). This configuration provides an alternative to...
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Potentiometric sensor with lipid-polymer membranes for quality assessment of French red wines
PublikacjaThe quality of wines resulting from vineyard management is important for consumers due to the taste and price of wines. In this work, the quality of red wines of three vintages has been investigated by potentiometric sensors with six all-solid-state electrodes. Two series of experiments were carried out. The first involved a qualitative analysis of wine of different vintages from freshly opened bottles. The second consisted of...
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A new index for statistical analyses and prediction of travelling ionospheric disturbances
PublikacjaTravelling Ionospheric Disturbances (TIDs) are signatures of atmospheric gravity waves (AGWs) observed in changes in the electron density. The analysis of TIDs is relevant for studying coupling processes in the thermosphere–ionosphere system. A new TID index is introduced, which is based on an easy extension of the commonly used approach for TID detection. This TID activity index, which can be applied for individual Global Navigation...
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Shape-dependent enhanced photocatalytic effect under visible light of Ag3PO4 particles
PublikacjaSilver phosphate (Ag3PO4) could be considered as visible light induced photocatalyst for pollutants degradation, due to its narrow band gap (∼2.4 eV). However, Ag3PO4 photoactivity depends on surface properties and synthesis route. In this study, differently shaped Ag3PO4 photocatalysts have been synthesized through the precipitation, ion exchange, soft-chemical or hydrothermal method. To correlate surface properties with photoactivity all...
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3D mesoporous α-Co(OH)2 nanosheets electrodeposited on nickel foam: A new generation of macroscopic cobalt-based hybrid for peroxymonosulfate activation
PublikacjaCobalt-based catalysts with high stability and facile recovery for heterogeneous peroxymonosulfate (PMS) activation are still rather sparse and therefore highly desirable. Herein, 3D mesoporous α-Co(OH)2 nanosheets was created on robust nickel foam (NF) via facile electrodeposition approach at 6 mA/cm2 for only 400 s. Almost complete removal of phenol can be achieved within 7 min with a degradation rate of 0.39 min−1, 2 times higher...
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Design, synthesis and high antitumor potential of new unsymmetrical bisacridine derivatives towards human solid tumors, specifically pancreatic cancers and their unique ability to stabilize DNA G-quadruplexes
PublikacjaNew promising unsymmetrical bisacridine derivatives (UAs), have been developed. Three groupsincluding 36 compounds were synthesized by the condensation of 4-nitro or 4-methylacridinone, imi-dazoacridinone and triazoloacridinone derivatives with 1-nitroacridine compounds linked with anaminoalkyl chain. Cytotoxicity screening revealed the high potency of these compounds against severaltumor cell lines. Particularly, imidazoacridinone-1-nitroacridine...
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Novel single-stranded DNA-binding proteins from extreme psychrophilic bacterium Psychromonas ingrahamii 37
PublikacjaWe report the identification and characterization of the single-stranded DNA binding protein (SSB) from extreme psychrophilic bacterium Psychromonas ingrahamii 37 (PinSSB) that grows expotentially at -12°C and may well grow at even lower temperatures. PinSSB is one of the largest known bacterial SSB protein consisting 222 amino acid residues with a calculated molecular mass of 25.1 kDa. The analysis by gel filtration chromatography...