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Search results for: CATALYTIC REACTOR
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Fault detection in the marine engine using a support vector data description method
PublicationFast detection and correct diagnosis of any engine condition changes are essential elements of safety andenvironmental protection. Many diagnostic algorithms significantly improve the detection of malfunctions.Studies on diagnostic methods are rarely reported and even less implemented in the marine engine industry.To fill this gap, this paper presents the Support Vector Data Description (SVDD) method as applied to thefault detection...
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Constant-Factor Approximation Algorithm for Binary Search in Trees with Monotonic Query Times
PublicationWe consider a generalization of binary search in linear orders to the domain of weighted trees. The goal is to design an adaptive search strategy whose aim is to locate an unknown target vertex of a given tree. Each query to a vertex v incurs a non-negative cost ω(v) (that can be interpreted as the duration of the query) and returns a feedback that either v is the target or the edge incident to v is given that is on the path towards...
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How to adapt Lean Six Sigma to improve performance of SMEs of manufacturing sector
PublicationThe main objective of the paper is to present the utilitarian effect of the adaptation of the Lean Six Sigma concept and its implementation in the small and medium-sized enterprises of the manufacturing sector. The original methodology was developed on the basis of research carried out in the Polish and French enterprises from 2009 to 2011. In the case of SMEs, the use of the concept of Lean Six Sigma is much less common, as...
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THE UNSUSTAINABILITY OF PUBLIC-SECTOR ORGANIZATIONAL NETWORKS: A CASE STUDY OF VOLUNTARY COURT NETWORKS
PublicationPurpose: The purpose of this study is to identify the problem of sustainability of public-sector 12 organizational networks on the example of common courts and what it implies for further 13 research. Methodology: The study used qualitative research tools in the form of structured 14 interviews. Interviews were conducted with 36 presidents and directors of common courts. 15 After conducting and transcribing each interview, their...
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Metrisable assessment of the course of stream‑systemic processes in vector form in industry 4.0
PublicationThe goal of this paper is to present an innovative conception how to use metrisable vector structure of a manufacturing process, based on quantitative relations between the activity of input streams, features of the product, and effect of losses; all of which are excellent practical solution for Industry 4.0, and in turn intelligent factories. This solution can be a usefull way in the process of building sustainable organization....
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RSS-Based DoA Estimation for ESPAR Antennas Using Support Vector Machine
PublicationIn this letter, it is shown how direction-of-arrival (DoA) estimation for electronically steerable parasitic array radiator (ESPAR) antennas, which are designed to be integrated within wireless sensor network nodes, can be improved by applying support vector classification approach to received signal strength (RSS) values recorded at an antenna's output port. The proposed method relies on ESPAR antenna's radiation patterns measured...
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Multi-factor fuzzy sets decision system forecasting consumer insolvency risk
PublicationThe objective of this study is to develop a multi-factor decision system predicting insolvency risk for natural persons with the use of fuzzy sets. Considering that the financial situation of households is affected by various endogenous and exogenous factors, the main assumption of this study is that the system for predicting financial difficulties should not be limited to the use of only a few financial variables concerning consumers,...
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Temperature effect on the current-voltage characteristic fill factor for the silicon solar cells
PublicationW pracy przedstawiono badania wpływu temperatury pracy krzemowych ogniw fotowoltaicznych na wartość współczynnika wypełnienia charakterystyki prądowo- napięciowej (FF). Efekty dyfuzyjne w obszarze złącza oraz rekombinacja nośników ładunku ograniczają wartość współczynnika wypełnienia charakterystyki. Spadek tej wartości wynika głównie ze wzrostu wartości rezystancji szeregowej rs. Na rezystancję szeregową składają się: opór emitera...
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The formal safety assessment and influence of human factor in application to chosen ship's type
PublicationTragedia jednego ze statków typu ro-ro pokazała podatność tego typu statków na utratę stateczności, przewrócenie się, a w ostateczności zatonięcie. Wszystkie ro-rowce charakteryzują się małym zanurzeniem, a wynurzona część kadłuba podatna jest na działanie wiatru. Jeżeli dodatkowo w takich warunkach dochodzi element nieprawidłowego rozmieszczenia pojazdów i ich słabego zamocowania to groźba przesunięcia ładunku staje się realna....
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Strength deterioration of 26H2MF and 34HNM steels used in ship engines: hydrogen factor
PublicationBadano podatność stali 26H2MF i 34HNM poddanych różnej obróbce cieplnej na niszczenie wodorowe. Badania wykonano metodą powolnego rozciągania z szybkością 10-6 s-1. Określano wytrzymałość, wydłużenie, przewężenie i energię zniszczenia. Stwierdzono znaczna degradację w 0,01 M kwasie siarkowym z dodatkiem arszeniku. Wykazano istnienie korelacji między obróbką cieplną i stopniem degradacji. Efekty przypisano pułapkowaniu wodoru.
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High Q-factor Microwave Fabry-Perot Resonator With Distributed Bragg Reflectors
PublicationZrealizowany został rezonator Fabry-Perot pracujący na częstotliwości 39 GHz i wykorzystujący dwie pary ćwierćfalowych kwarcowych reflektorów Bragga. Dla fali o długości 98.26 mm otrzymano dobroć ok. 560,000, co oznacza 4.3-krotny wzrost w porównaniu z identycznym rezonatorem bez reflektorów Bragga. Analizę problemu wykonano przy pomocy metody różnic skończonych w dziedzinie częstotliwości (FDFD) i porównano z uproszczonym rozwiązaniem...
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A simple modification to improve the accuracy of methylation-sensitive restriction enzyme quantitative polymerase chain reaction
PublicationDNA digestion with endonucleases sensitive to CpG methylation such as HpaII followed by polymerase chain reaction (PCR) quantitation is commonly used in molecular studies as a simple and inexpensive solution for assessment of region-specific DNA methylation. We observed that the results of such analyses were highly overestimated if mock-digested samples were applied as the reference.We determined DNA methylation levels in several...
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The effects of confinement in pores built of folded graphene sheets on the equilibrium of nitrogen monoxide dimerisation reaction
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The reaction heats and PM5 semiempirical studies of complexes formed between silicon podand and monovalent cations
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The reaction heats and PM5 semiempirical studies of complexes formed between silicon podand and Li+ cations
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Two-Dimensional Molybdenum Diselenide Tuned by Bimetal Co/Ni Nanoparticles for Oxygen Evolution Reaction
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The kinetics of substitution reaction of oxydiacetate and thiodiacetate copper(II) complexes with 1,10-phenanthroline and 2,2’-bipyridine
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Synergistic interactions and reaction mechanisms of biochar surface functionalities in antibiotics removal from industrial wastewater
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Reaction to Disease and Coping Strategies in Stressful Situations among Psoriasis Patients: Cross-Sectional Study
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Metrological characteristics of the flat voltammetric electrode in time domain with a reversible electrochemical reaction running on the surface
PublicationW artykule przedstawiono właściwości metrologiczne płaskich elektrod woltamperometrycznych. Omówiono wpływ napięcia polaryzującego na wartości parametrów charakteryzujących te elektrody.
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Fabrication of ILs-Assisted AgTaO3 Nanoparticles for the Water Splitting Reaction: The Effect of ILs on Morphology and Photoactivity
PublicationThe design of an active, stable and ecient photocatalyst that is able to be used for hydrogen production is of great interest nowadays. Therefore, four methods of AgTaO3 perovskite synthesis, such as hydrothermal, solvothermal, sol-gel and solid state reactions, were proposed in this study to identify the one with the highest hydrogen generation eciency by the water splitting reaction. The comprehensive results clearly show that...
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Spectacular Oxygen Evolution Reaction Enhancement through Laser Processing of the Nickel‐Decorated Titania Nanotubes
PublicationThe selective, laser‐induced modification of the nickel‐decorated titania nanotubes provides remarkable enhancement toward oxygen evolution reaction. Particularly, the irradiation of the laterally spaced crystalline TiO2 nanotubes, results in the formation of the tight closure over irradiated end, preserving their hollow interior. The shape of the absorbance spectra is modulated along with applied energy, and the new absorption...
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Spectacular Oxygen Evolution Reaction Enhancement Through Laser Processing of the Nickel-Decorated Titania Nanotubes
PublicationThe selective, laser-induced modification of the nickel-decorated titania nanotubes provides remarkable enhancement toward oxygen evolution reaction. Particularly, the irradiation of the laterally spaced crystalline TiO2 nanotubes, results in the formation of the tight closure over irradiated end, preserving their hollow interior. The shape of the absorbance spectra is modulated along with applied energy, and the new absorption...
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New reaction of dithiophosphoric acids with O-thioacylhydroxylamines. Nucleophilic substitution or single electron transfer process?
PublicationUdowodniono, że dipodstawione lub sterycznie przeszkodzone hydroksyloaminy reagują z przestrzennie rozbudowanymi S-tioacyloditiofosforanami dając odpowiednie O-tioacylohydroksyloaminy. Dalsza reakcja O-tioacylohydroksyloaminy z kwasem ditiofosforowym prowadzi do powstania disiarczku acylowo tiofosfo-rylowego oraz soli amoniowej kwasu ditiofosforowego. Wpływ pułapek rodnikowych na wydajność tej reakcji świadczy dobitnie, że w procesie...
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Ethylene photocatalytic decomposition in high temperature reaction chamber
Open Research DataData contain data logs of measurements performed on High Temperature Chamber "The Praying Mantis" coupled with SRI 8010 gas chromatograph. Measurement was performed for TiO2 irradiated by UV and under flowing of ethylene gas diluted in air and with the use of elevated temperature.
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Photocatalytic degradation of acetaldehyde in high temperature reaction chamber
Open Research DataThis dataset contains chromatograms recorded during the decomposition of acetaldehyde in a high-temperature reaction chamber under UV irradiation using TiO2 (titanium dioxide) as photocatalysts. It includes data on the influence of flow rate, TiO2 (titanium dioxide) filling the entire reactor, a thin layer of TiO2 (titanium dioxide) supported on KBr...
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Synthesis of 3-indolylmethyl substituted (pyrazolo/benzo)triazinone derivatives under Pd/Cu-catalysis: Identification of potent inhibitors of chorismate mutase (CM)
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From Sequential to Parallel Implementation of NLP Using the Actor Model
PublicationThe article focuses on presenting methods allowing easy parallelization of an existing, sequential Natural Language Processing (NLP) application within a multi-core system. The actor-based solution implemented with the Akka framework has been applied and compared to an application based on Task Parallel Library (TPL) and to the original sequential application. Architectures, data and control flows are described along with execution...
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Reaction Chemistry & Engineering
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The structure of the Polish banking sector in 2004-2018
Open Research DataDynamic changes in the banking system in the 1990s contributed to the relative stability of the number of banks in all sectors (state-owned, private, cooperative) after 2004. The total number of banks (including credit institutions) has decreased since 2004 from 653 to 612 in 2018 - it should therefore be noted that in the analyzed period the Polish...
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Selective H2 production from plastic waste through pyrolysis and in-line oxidative steam reforming
PublicationThis study deals with the proposal of pyrolysis and in-line oxidative steam reforming (P-OSR) for plastic waste valorization and assesses the potential of this strategy for the selective production of H2. Overall, the study aims at progressing towards the fine-tuning of the pyrolysis-reforming technology by co-feeding O2. Thus, a multi-point O2 injection system has been developed to ensure a suitable O2 distribution in the reforming...
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The convergence of gender wage differences - myth or fact - multi country multi sector analysis
PublicationThe Becker’s theory of discrimination predicts that in the long run the gender wage differences should disappear. In our empirical analysis we verify the testable implications of this mode considering the hypothesis of gender wage gap convergence. The study takes into account 31 sectors in 13 European countries for the period between 1970 and 2005. We distinguish between wages paid to different groups of workers classified according...
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3D Sound Intensity Measurement Around Organ Pipes Using Acoustic Vector Sensors
PublicationThe aim of the presented paper was to obtain and visualize sound intensity distribution of radiated acoustic energy around the organ pipes. The experimental setup consisted of the multichannel acoustic vector sensor and the specialized Cartesian robot. Measurements were performed in free field with spatial resolution of 0.1 [m]. Two organ pipes, i.e. wooden and metal were measured during the ex-periment. The organ pipes were activated...
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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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Human factor and functional Safety analysis = Czynniki ludzkie i analiza bezpieczeństwa funkcjonalnego
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Resiliency as a factor protecting youths from risky behaviour: Moderating effects of gender and sport
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Total mercury in great cormorant (Phalacrocorax carbo) and fish in polish sector of Vistula Lagoon
PublicationAnalizowano tkanki miękkie 55 osobników kormorana czarnego oraz wybrane gatunki ryb stanowiące ich pokarm. Badane próbki pochodziły z ekosystemu Zalewu Wiślanego. Zawartość rtęci oznaczono w narządach wewnętrznych kormorana czarnego takich jak: wątroba, nerki, mięśnie, przełyk, żołądek, jelita, tchawica, płuca, mięsień sercowy. Przebadano następujące gatunki ryb: śledź, stynka, karaś, karaś srebrzysty, płoć, lin, jazgarz. Oznaczenia...
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Kinetic flux vector splitting scheme for solving non-reactive multi-component flows
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CD105 and placental growth factor – Potent prognostic factors in childhood acute lymphoblastic leukaemia
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Graphene-encapsulated iron nanoparticles as a non-viral vector for gene delivery into melanoma cells
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Dry cutting effect in turning of a duplex stainless steel as a key factor in clean production
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Emisja rtęci z polskiej energetyki = Mercury emission from polish energy sector
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A Proliferation-Inducing Ligand and B-Cell Activating Factor Are Upregulated in Patients with Essential Thrombocythemia
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Emisja rtęci z polskiej energetyki = Mercury emission from polish energy sector
PublicationEnergetyka jest głównym źródłem emisji rtęci- według krajowej inwentaryzacji emisji metali ciężkich. Jednak podawana emisja z elektrowni i elektrociepłowni spalających węgiel kamienny wydaje się być zawyżona. Najnowsze badania wykazują niższą zawartość rtęci w węglu kamiennym (50-150 ppb) niż w węglu brunatnym (120-370ppb). Istnieje zatem potrzeba weryfikacji stosowanych wskaźników emisji dla procesów spalania węgla, które służą...
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Triazolopeptides Inhibiting the Interaction between Neuropilin-1 and Vascular Endothelial Growth Factor-165
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Sparse vector autoregressive modeling of audio signals and its application to the elimination of impulsive disturbances
PublicationArchive audio files are often corrupted by impulsive disturbances, such as clicks, pops and record scratches. This paper presents a new method for elimination of impulsive disturbances from stereo audio signals. The proposed approach is based on a sparse vector autoregressive signal model, made up of two components: one taking care of short-term signal correlations, and the other one taking care of long-term correlations. The method...
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The dynamics of the total output of the Japanese fisheries sector: An analysis using input-output approach
PublicationThe purpose of this study is to investigate the dynamics of the total output of the fisheries industry when the changes of the final demand occur. This study focuses on the case of Japan. This study employs a demand-pull Input-Output (IO) quantity model, one of the calculation instruments in the IO analysis, as an analysis tool. Two conditions are included in calculation and analysis parts, namely (1) “whole sector change”, and...
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Neural Networks, Support Vector Machine and Genetic Algorithms for Autonomous Underwater Robot Support
PublicationIn this paper, artificial neural networks, a classification technique called support vector machine and meta-heuristics genetic algorithm have been considered for development in autonomous underwater robots. Artificial neural networks have been used for seabed modelling as well as support vector machine has been applied for the obstacles classification to avoid some collision problems. Moreover, genetic algorithm has been applied...
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Stakeholders Satisfaction Index as an Important Factor of Improving Quality Management Systems of Universities in Poland
PublicationThe following article analyses the role of stakeholders in selected methods of assessing the quality of educational services of universities and discusses quality management systems according to Common Assessment Framework for education. Furthermore, it presents the example of method of stakeholder satisfaction measurement called Stakeholders Satisfaction Index (SSI) which is an original proposal of an aggregate measure of satisfaction...
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Review of hydrogen production technologies for automotive sector – thermodynamic analysis of energy and exergy losses
PublicationFew recent years has shown that hydrogen technology has a good chance to replace petroleum technology in automotive sector. However, hydrogen in pure form practically does not occur on Earth. That is why H2 form is used only as an energy carrier and it must be produced using another source of energy form water or hydrocarbon fuels. In this paper short overview of hydrogen production technology has been presented, with energy and...