Search results for: TESTERY KOROZYJNE

• Environmentally acceptable lubricants (EAL) compared with a reference mineral oil as marine stern tube bearing lubricant – Experimental and theoretical investigations

  Publication

  • J. Frost
  • M. Frycz
  • J. Kowalski
  • M. Wodtke
  • W. Litwin

  - TRIBOLOGY INTERNATIONAL - Year 2023

  The purpose of this research is to indicate the potential differences in bearing characteristics resulting from the application of different lubricant types with the same viscosity grade. The effect of different environmentally acceptable lubricants (EALs) on hydrodynamic journal bearing properties is studied experimentally and compared to the properties obtained after lubrication with a reference mineral oil. The results of the...

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• Usefulness of separation techniques for identification and determination of Oxygenated Volatile Organic Compounds used in process analytics of water and wastewater

  Publication

  • G. Boczkaj
  • P. Makoś-Chełstowska

  - Camera Separatoria - Year 2014

  W pracy przedstawiono przegląd i porównanie metodyk identyfikacji i oznaczania Lotnych Związków Tlenoorganicznych (LZT). Porównano metodyki klasyczne umożliwiające oznaczanie wybranej grupy związków chemicznych należących do LZT lub dokonywanie oznaczeń sumarycznej zawartości z metodykiami wykorzystującymi techniki rozdzielania. Lotne związki tlenoorganicze, do których zaliczane są aldehydy, alkohole, ketony, estry, etery oraz...

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• Badania eksperymentalne mikroturbozespołów

  Publication

  • W. Włodarski

  - Year 2016

  W pracy zaprezentowano rezultaty badań eksperymentalnych mikroturbozespołów parowych pracujących w zmiennych warunkach ruchu. Opisywane testy dotyczyły właściwości kompletnego urządzenia jakim jest mikroturbozespół, a nie wyłącznie jego podzespołów: mikroturbiny lub generatora elektrycznego. Badania przeprowadzono na pięciu różnych mikroturbozespołach różniących się typem generatora elektrycznego oraz typem konstrukcyjnym turbiny....

• Waterborne polyesters partially based on renewable resources

  Publication

  • L. Jasińska-Walc
  • C. E. Koning

  - JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY - Year 2010

  A new experimental approach for preparing biobased, water-soluble polyesters via titanium(IV) n-butoxide-catalyzed bulk polycondensation is presented. In the described method polymers were obtained from isosorbide, maleic anhydride and poly(ethylene glycol). The chemical structure of the synthesized polyesters was confirmed using 2D NMR spectroscopy and by titration methods. Careful analysis of 2D NMR spectra viz. Correlation Spectra...

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• Do Phenyl Substituents Affect the Properties of Azobenzocrown Derivatives?

  Publication

  • E. Wagner-Wysiecka
  • P. Szulc
  • E. Luboch
  • J. Chojnacki
  • D. Laskowska
  • P. Miklaszewska
  • P. Sowiński

  - ChemPlusChem - Year 2023

  New products of photo- and thermal rearrangements of 19-membered azoxybenzocrown with phenyl substituents in benzene rings in the para positions to oligooxyethylene fragments are characterized. The yields of photochemical transformations depend on the solvent. Para-hydroxyazocrown is formed with yields over 50% in propan-2-ol. Ortho-hydroxyazobenzocrown is obtained with yields up to 70% in toluene/acetic acid mixture. Macrocyclic...

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• Directions and Prospects for the Development of the Electric Car Market in Selected ASEAN Countries

  Publication

  • K. Gomółka
  • P. Kasprzak

  - ENERGIES - Year 2021

  The purpose of this article is to present the current situation and evaluate the opportuni‐ ties for the development of the electric car market in selected Southeast Asian countries in the con‐ text of the current situation in the rest of the world. Currently, the electric car market is at an ad‐ vanced stage of development in regions such as Western Europe, the USA, and China. It should be noted, however, that the number of electric...

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• The influence of different time duration of thermal processing on berries quality

  Publication

  • P. Arancibia-Avila
  • J. Namieśnik
  • F. Toledo
  • E. Werner
  • A. L. Martinez-Ayala
  • N. E. Rocha-Guzman
  • J. A. Gallegos-Infante
  • S. Gorinstein

  - FOOD CONTROL - Year 2012

  Oznaczano zawartość związków bioaktywnych (polifenole, flawonoidy, taniny, antocyjany i kwas askorbinowy) oraz poziom aktywności przeciwutleniającej próbek ekstraktów (wodnych, heksanowych i acetonowych) uzyskanych z różnych gatunków owoców jagodowych. Do pomiaru poziomu aktywności przeciwutleniającej wykorzystano takie testy jak ABTS, DPPH, FRAP i CUPRAC. Zbadano wpływ czasu trwania procesu obróbki termicznej na zawartość bioaktywnych...

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• Efficient finite difference analysis of microstructured optical fibers [on line]

  Publication

  • P. Kowalczyk
  • M. Wiktor
  • M. Mrozowski

  - Year 2005

  W pracy przedstawiono nową technikę numerycznej analizy mikrostruktur światłowodowych. Technika ta polega na połączeniu metody różnic skończonych i dyskretnych rozwinięć funkcyjnych. Pozwala to na zmniejszenie rozmiaru macierzy powstających przy analizie problemu, a jednocześnie na bezpośrednią implementację radiacyjnych warunków brzegowych. Testy algorytmu przeprowadzono dla kilku wybranych struktur, uzyskując bardzo dobrą zgodność...

• Nietypowe próbne obciążenia pali prefabrykowanych

  Publication

  • K. Sahajda
  • K. Gwizdała

  - Inżynieria Morska i Geotechnika - Year 2008

  Osiadanie grup palowych wciąż stanowi problem naukowy i inżynierski. Dotyczy to również małych grup palowych, dla pali usytuowanych w jednym rzędzie. W pracy przedstawiono wyniki próbnych obciążeń statycznych dwóch pali. W programie badawczym wykonano testy dla obu pali łącznie oraz oddzielnie. Różna charakterystyka krzywych osiadania wymaga dalszych weryfikacji przy uwzględnieniu zmiennych parametrów geotechnicznych i geometrycznych.

• Wpływ redukcji grubości elementu betonowego na nośność kotew metalowych w betonie

  Publication

  • M. Szymański

  - Year 2006

  Grubość elementu betonowego przyjęta z warunków wykonawczych, bez negatywnego wpływu naroży i krawędzi, jest wystarczająca do osiągnięcia nośności charakterystycznej jak dla elementu o standardowej wysokości minimalnej. Nie ma tu obawy o przedwczesne zniszczenie betonu przez rozłupanie. Aby uzyskać wymaganą nośność z uwzględnieniem wzajemnego rozstawu łączników i wpływem obecności krawędzi elementu należy przeprowadzić dodatkowe...

• Wizualizacja partytur w środowisku internetu

  Publication

  • M. Szwoch

  - Zeszyty Naukowe Wydziału ETI Politechniki Gdańskiej. Technologie Informacyjne - Year 2007

  W pracy przedstawiono problematykę wizualizacji notacji muzycznej w środowisku internetowym. Omówione zostały najważniejsze metody publikacji partytur w postaci obrazów rastrowych i wektorowych. Przedstawiono znacznikowy format opisu notacji muzycznej - MusicXML oraz format prezentacji grafiki wektorowej - SVG. Wskazano również potrzebę stworzenia i przedstawiono koncepcję oraz pierwsze testy biblioteki służącej wizualizacji partytur...

• Comparison of Z-E isomerization in Langmuir-Blodgett layers and in solution

  Publication

  • I. Zawisza
  • R. Bilewicz
  • K. Janusz
  • J. Sworakowski
  • E. Luboch
  • J. Biernat

  - Materials Science & Engineering C-Materials for Biological Applications - Year 2002

  Porównano izomeryzację Z-E w monowarstwie Langmuira-Blodgett i w roztworze. Badanymi cząsteczkami były etery koronowe z elektro- i fotoaktywną resztą azobenzenu jako częścią makrocyklu. Szybkość fotoindukowanej izomeryzacji E-Z i spontanicznej termicznej reakcji Z-E była obliczana na podstawie pomiarów elektrochemicznych i spektroskopowych. Stwierdzono, że izomeryzacja jest szybsza w monowarstwie niż w roztworze.

• Azo macrocyclic compounds.

  Publication

  • E. Luboch
  • R. Bilewicz
  • M. Jamrógiewicz
  • E. Wagner-Wysiecka
  • J. Biernat

  - Year 2004

  Artykuł przeglądowy omawiający głównie syntezę i właściwości związków makrocyklicznych takich jak: etery koronowe, kryptandy, kaliksareny i inne, które połączono z fragmentem zawierającym resztę azobenzenową lub jej analogi. Artykuł napisany został w oparciu o prace własne autorów z lat 1992-2001 oraz na podstawie literatury obcej zebranej na podstawie Chemical Abstracts z lat 1990-2001.

• Modelling of Nuclear Power Plant Steam Turbine

  Publication

  • A. Kobylarz
  • K. Kulkowski
  • K. Duzinkiewicz
  • M. Grochowski

  - Year 2014

  The paper describes the approach to a Nuclear Power Plant steam turbine modelling which would enable on-line optimal process control (model based) and diagnosis over wide range of operating conditions caused by changing power demand. Presented model is static, multivariable and nonlinear. Such model enables analyzing the heat cogeneration aspects. Developed model is validated and verified by using archive data gained from researches...

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• Optical glyphs based localization and identification system

  Publication

  • G. Redlarski
  • A. Pałkowski
  • D. Ambroziak

  - Pomiary Automatyka Robotyka - Year 2013

  The paper presents a description of functioning of a platform supporting the detection of obstructive diseases in the respiratory system education process. A 16-parameter model of the respiratory system simulated in the MATLAB/Simulink environment was set in the role of the tested patient. It has been linked to the control layer, developed in the LabVIEW environment, using the SIT library (Simulation Interface Toolkit). This layer...

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• An application supporting the educational process of the respiratory system obstructive diseases detection

  Publication

  • G. Redlarski
  • J. Jaworski
  • P. Tojza

  - Pomiary Automatyka Robotyka - Year 2013

  The paper presents a description of functioning of a platform supporting the detection of obstructive diseases in the respiratory system education process. A 16-parameter model of the respiratory system simulated in the MATLAB/Simulink environment was set in the role of the tested patient. It has been linked to the control layer, developed in the LabVIEW environment, using the SIT library (Simulation Interface Toolkit). This layer...

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• Performance evaluation of the parallel object tracking algorithm employing the particle filter

  Publication

  • G. Szwoch

  - Year 2016

  An algorithm based on particle filters is employed to track moving objects in video streams from fixed and non-fixed cameras. Particle weighting is based on color histograms computed in the iHLS color space. Particle computations are parallelized with CUDA framework. The algorithm was tested on various GPU devices: a desktop GPU card, a mobile chipset and two embedded GPU platforms. The processing speed depending on the number...

• Oxygen biosensor based on carbon nanotubes directly grown on graphitic substrate

  Publication

  • K. Sadowska
  • B. J. Trawiński
  • S. Dramińska
  • D. Majdecka
  • R. Bilewicz
  • B. Kusz

  - SENSORS AND ACTUATORS B-CHEMICAL - Year 2017

  Films of carbon nanotubes were synthesized on the graphitic substrates by CVD method in the presence of catalyst. Two different catalysts were used, that is nickel and iron, supported on graphitic substrates. The as-obtained nanotubes were analyzed by SEM imaging with EDX and Raman spectroscopy. The results revealed their multi-walled morphology. Free radical reaction was carried out in order to chemically functionalize synthesized...

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• An improved method for flow boiling heat transfer with account of the reduced pressure effect

  Publication

  • B. Jakubowska
  • D. Mikielewicz

  - Thermal Science - Year 2019

  In the paper are presented the results using the authors own model to predict heat transfer coefficient during flow boiling. The model has been tested against a large selection of experimental data to investigate the sensitivity of the in-house developed model. In the work are presented the results of calculations obtained using the semi-empirical model on selected experimental flow boiling data of the refrigerants: R134a, R1234yf,...

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• Automatic Correction of Non-Anechoic Antenna Measurements Using Complex Morlet Wavelets

  Publication

  • A. Bekasiewicz
  • V. Waladi

  - IEEE Antennas and Wireless Propagation Letters - Year 2024

  Real-world performance of antennas is normally tested in anechoic chambers (ACs). Alternatively, experimental validation can be performed in non-anechoic environments and refined in the course of post-processing. Unfortunately, the existing methods are difficult to setup and prone to failure. In this letter, a wavelet-based framework for correction of non-anechoic antenna measurements has been proposed. The method involves automatic...

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• Saccharides

  Publication

  • H. Staroszczyk

  - Year 2023

  Saccharides are widely distributed in nature as the major component of fruits and vegetables (primarily monosaccharides), milk and malt (mainly disaccharides), and grains (mostly polysaccharides). They are an important source of energy, structural material, as well as flavor and taste factors. Molecules of this class of compounds contain mainly carbon, hydrogen, and oxygen atoms; however, most natural saccha- rides do not have...

• Modelling of Nuclear Power Plant Steam Turbine

  Publication

  • A. Kobylarz
  • K. Kulkowski
  • M. Grochowski
  • K. Duzinkiewicz

  - Year 2014

  The paper describes the approach to a Nuclear Power Plant steam turbine modelling which would enable on-line optimal process control (model based) and diagnosis over wide range of operating conditions caused by changing power demand. Presented model is static, multivariable and nonlinear. Such model enables analyzing the heat cogeneration aspects. Developed model is validated and verified by using archive data gained from researches...

• Photoelectrochemical properties of BIMEVOX (ME=Cu, Zn, Mn) electrodes in contact with aqueous electrolyte

  Publication

  • K. Trzciński
  • A. Borowska-Centkowska
  • M. Sawczak
  • A. Lisowska-Oleksiak

  - SOLID STATE IONICS - Year 2015

  Layered oxide Bi4O2O11 and mixed oxides of bismuth, vanadium and a third metal (ME = Cu, Zn, Mn) were synthesized and characterized using XRD, Raman and SEM. The energy band gap (Eg) of samples determined using UV–VIS reflectance spectra equals to 2.46, 2.34, 2.27 and 2.18 eV for Bi4V2O11, BICUVOX (Bi2V1 − xCuxO5.5 − 3x/2), BIZNVOX (Bi2V1 − xZnxO5.5 − 3x/2) and BIMNVOX (Bi2V1 − xMnxO5.5 − x/2) (x = 0.1), respectively. Open circuit...

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• Existence and uniqueness of monotone and bounded solutions for a finite-difference discretization a` la Mickens of the generalized Burgers–Huxley equation.

  Publication

  • J. E. Macías-Díaz
  • A. Szafrańska

  - JOURNAL OF DIFFERENCE EQUATIONS AND APPLICATIONS - Year 2014

  Departing from a generalized Burgers–Huxley partial differential equation, we provide a Mickens-type, nonlinear, finite-difference discretization of this model. The continuous system is a nonlinear regime for which the existence of travelling-wave solutions has been established previously in the literature. We prove that the method proposed also preserves many of the relevant characteristics of these solutions, such as the positivity,...

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• Mobility Managment Scenarios for IPv6 Networks-Proxy Mobile IP-v6Implementation Issues

  Publication

  • M. Hoeft
  • K. Gierłowski
  • T. Gierszewski
  • Ł. Wiszniewski
  • J. Woźniak

  - Zeszyty Naukowe Wydziału ETI Politechniki Gdańskiej. Technologie Informacyjne - Year 2014

  Management of user at the network layer plays an important role in efficient network operation. In the paper, authors' implementation of one of network-based mobility management models, namely Proxy Mobile IPv6, is presented and tested in a number of networking topologies and communication scenarios. The proposed implementation covers PMPIv6 functionality with optional security extensions (use of Diameter protocol) and handover...

• Self-Testing of Analog Parts Terminated by ADCs Based on Multiple Sampling of Time Responses

  Publication

  • Z. Czaja

  - IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT - Year 2013

  A new approach for self-testing of analog parts terminated by analog-to-digital converters in mixed-signal electronic microsystems controlled by microcontrollers is presented. It is based upon a new fault diagnosis method using a transformation of the set of voltage samples of the time response of a tested analog part to a square impulse into localization curves placed in a multidimensional measurement space. The method can be used...

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• Determination of Local Dye Concentration in Hybrid Porous Silica Thin Films

  Publication

  • A. Synak
  • P. Bojarski
  • B. Grobelna
  • L. Kułak
  • A. Lewkowicz

  - Journal of Physical Chemistry C - Year 2013

  The idea of determination of local dye concentration in a nanoporous matrix is proposed based on donor − acceptor energy transfer. The method was tested for a Rhodamine 110 − Rhodamine 101 system in silica and methylated silica nanolayers. Evaluation of acceptor (Rhodamine 101) local concentration was carried out by comparing the results of Monte Carlo simulation of energy transfer from donor (Rhodamine 110) to acceptor (Rhodamine...

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• Optimization of a Fabry-Perot Sensing Interferometer design for an optical fiber sensor of hematocrit level

  Publication

  • P. Wierzba
  • M. Szczerska

  - ACTA PHYSICA POLONICA A - Year 2013

  Continuous measurement of the hemato crit level in blo o d can p otentially b e p erformed using optical bre sensors. The FabryPerot interferometric sensors are a promising candidate in this application. The most imp ortant step in the design of the sensor is design of the sensing interferometer. Adequate cavity length and high interference contrast are two most imp ortant requirements in this application. The design metho d of...

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• Cation sensing by diphenyl-azobenzocrowns

  Publication

  • E. Wagner-Wysiecka
  • M. Szarmach
  • J. Chojnacki
  • N. Łukasik
  • E. Luboch

  - JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY - Year 2017

  Metal cations complexation and proton binding by 13- and 16-membered diphenyl-azobenzocrowns and diphenyl-hydroxyazobenzocrowns were studied in acetonitrile using spectroscopic methods: UV–vis spectroscopy, spectrofluorimetry, and 1H NMR spectroscopy. Phenyl moieties in benzene rings were found to affect binding strength alkali and alkaline earth metal cations and hydrogen ion, and affect tautomeric equilibrium of hydroxyazobenzocrowns....

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• SYSTEM POMIAROWY DO URZĄDZENIA TYPU STEPPER DEDYKOWANY DO PRÓB WYSIŁKOWYCH

  Publication

  • A. Golijanek-Jędrzejczyk
  • O. Marcin
  • L. Rafiński

  - Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej - Year 2016

  W artykule przedstawiono system pomiarowy opracowany do urządzenia typu stepper, umożliwiającego przeprowadzenie próby wysiłkowej zgodnie z testem Astrand’a-Ryhminga. Budowa prototypu systemu pomiarowego wymagała modyfikacji mechanicznej urządzenia typu stepper udostępnionego przez Akademię Wychowania Fizycznego i Sportu w Gdańsku oraz doboru części sprzętowej systemu pomiarowego (czujników, mikrokontrolera). Celem projektu było...

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• Degradation of reference tyres used for CPX measurements

  Publication

  • J. Ejsmont
  • B. Świeczko-Żurek
  • W. Owczarzak
  • S. Sommer
  • P. Mioduszewski

  - Year 2017

  Measurements of tyre/road noise using the Close Proximity Method are based on reference tyres that are described in ISO/TS 11819-3. The standard specifies two tyres, namely "P1" and "H1" that should be used during measurements. To be used for measurements each tyre must fulfill certain conditions that are listed in the standard. The conditions are related to the tread pattern depth and rubber hardness. During experiments performed...

• Risk Analysis by a Probabilistic Model of the Measurement Process

  Publication

  • W. Toczek
  • J. Smulko

  - SENSORS - Year 2021

  The aim of the article is presentation of the testing methodology and results of examination the probabilistic model of the measurement process. The case study concerns the determination of the risk of an incorrect decision in the assessment of the compliance of products by measurement. Measurand is characterized by the generalized Rayleigh distribution. The model of the meas-urement process was tested in parallel mode by six risk...

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• Tetrahedrally modified MnMe0.1Co1.9O4 (Me = Zn, Mg, Li) spinels for non-enzymatic glucose sensing

  Publication

  • K. Lankauf
  • K. Ostrowska
  • K. Górnicka
  • J. Karczewski
  • P. Jasiński
  • S. Molin

  - MATERIALS LETTERS - Year 2022

  In this work, tetrahedrally modified MnMe0.1Co1.9O4 (Me = Zn, Mg, Li) spinels were prepared via the sol–gel synthesis method with subsequent ball-milling fragmentation. The prepared samples were evaluated as glucose–sensing catalyst. The reference MnCo2O4 spinel exhibited a sensitivity of 49 µA mM−1 cm−2 and a nonlinearity error of 5.2% in the response range from 0.02 to 1 mM. The partial substitution of cobalt in the reference...

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• Measurement of temperature at sliding polymer surface by grindable thermocouples

  Publication

  • O. Nosko
  • T. Nagamine
  • A. L. Nosko
  • A. Romashko
  • H. Mori
  • Y. Sato

  - TRIBOLOGY INTERNATIONAL - Year 2015

  This paper is devoted to experimental study of capabilities and limitations of grindable thermocouples as applied to polymer materials sliding on metal. Chromel–alumel and chromel–copel grindable thermocouples have been developed and tested for wide ranges of contact pressure and sliding velocity. The background temperature of the sliding surface can be determined as the lower envelope of the signal from the grindable thermocouple....

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• The energy approach to fatigue crack growth of S355 steel welded specimens subjected to bending

  Publication

  • D. Rozumek
  • J. Lewandowski
  • G. Lesiuk
  • Z. Marciniak
  • J. A. Correia
  • W. Macek

  - THEORETICAL AND APPLIED FRACTURE MECHANICS - Year 2022

  The study presents the results of the research on the rate of fatigue crack growth subjected to bending in the ferritic-pearlitic structure. The studies were carried out at a constant amplitude of the moment and at various values ​​of the load ratios R and at the operating frequency of the machine of 28.4 Hz. Flat specimens made of S355 steel and with fillet welds and with double-sided blunt external notches as well as concave...

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• Calix[4]arene-Thioamides as Ionophores for Transition and Heavy Metal cations

  Publication

  • J. Kulesza
  • M. Guziński
  • M. Bocheńska
  • V. Hubscher-Bruder
  • F. Arnaud-Neu

  - Year 2009

  Calix[4]arene derivatives play an important role as sensing materials in Ion Selective Electrodes(ISEs). Nowadays a high impact is put to control in natural waters the level of toxic heavy metals, like Pb ,Cd, Hg or Cu which may cause the great risk to human health. Our goal was to design and to synthesize ligands possessing ability to bind transition and heavy metal cations. The synthesis, crystal structures,extractive and ionophoric...

• The Impact Of The Selected Parameters Of Fdm Manufacturing Technology On Tribological Performance Of Abs–Steel Pair Under Dry Friction

  Publication

  • K. Suwińska
  • J. Łubiński

  - TRIBOLOGIA - Year 2020

  The paper presents the result of tribological test of ABS and steel samples sliding under dry friction. Polymeric samples were manufactured of ABS material using FDM technology. Testing was carried out in unidirectional sliding in a ring-on-flat contact in a PT-3 tribometer. The scope of tested parameters included volumetric and mass wear, the friction coefficient, and polymeric specimen temperature. Polymeric specimens used in...

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• Cylindrical orifice testing in laminar flow with the orifice diameter ratio β = 0.5

  Publication

  • A. Golijanek-Jędrzejczyk
  • A. Mrowiec

  - Scientific Reports - Year 2023

  The paper presents the results of an experimental study of a cylindrical orifice with the orifice diameter ratio β = 0.5 and the flow opening length‑to‑diameter ratio L/d = 1, with hydraulic oil flowing in the DN50 measuring channel. The measurements of the values characterising the oil flow were made in the laminar flow regime, for the Reynolds numbers ranging between Re = 100 to 950. Based on the experimental tests, standard...

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• Musical recording in a stereo surround system

  Publication

  • A. Sitek
  • B. Kostek

  - Year 2010

  Celem niniejszego artykułu jest omówienie realizacji nagrania chóru gospelowego wraz z towarzyszącym mu zespołem w systemie stereofonii dookólnej 5.1. W pierwszej kolejności przedstawiono techniki mikrofonowe użyte podczas nagrania. Następnie omówiono szczegóły związane z jego realizacją w studiu Radia Gdańsk. Ponadto przeprowadzono testy subiektywne z udziałem grupy ekspertów i na tej podstawie wybrano najlepiej ocenianą technikę...

• Rough-neutral approach to testing the influence of visual cues on surround sound perception

  Publication

  • B. Kostek

  - Year 2003

  W rozdziale przedstawiono problem wpływu obrazu na odbierany w systemie doo-kólny dźwięk. W celu określenia tego wpływu przeprowadzono testy subiektyw-ne. Do obróbki wyników testów subiektywnych użyto systemu hybrydowego zło-żonego z algorytmu genetycznego, sieci neuronowej oraz algorytmu opartego ometodę zbiorów przybliżonych. Zadaniem tego ostatniego elementu systemu byłowyznaczanie reguł opisujących wpływ postrzeganego obrazu...

• Macromodels in the frequency domain analysis of microwave resonators.

  Publication

  • Ł. Kulas
  • M. Mrozowski

  - Year 2004

  W artykule zaprezentowana jest technika włączania makromodeli do metod siatkowych sformułowanych w dziedzinie częstotliwości.W odróżnieniu do poprzednich, nowy schemat nie wprowadza zależności częstotliwościowej do macierzy systemowej i dzięki temu może być użyta w analizie rezonatorów. Testy numeryczne pokazują wzrost dokładności obliczeń w szerokim zakresie częstotliwości, przy czym właściwości zbieżności iteracyjnego algorytmu...

• Alternative method for the synthesis of imidazo[5,1-f][1,2,4]triazin-4(3H)-one—a substrate for the preparation of phosphodiesterase (5) inhibitors

  Publication

  • T. Olszewska
  • E. Gajewska
  • M. J. Milewska

  - TETRAHEDRON - Year 2013

  Imidazo[5,1-f][1,2,4]triazin-4(3H)-ones, as isosteres of purine, are of interest for pharmaceutical research as potential substrates for the synthesis of cGMP-PDE5 inhibitors. We present a novel, alternative method for the synthesis of imidazotriazinones, that differs from the previously reported ones with respect to the method of construction of the triazinone ring in the molecule. The key step in our approach is condensation...

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• Biotest - nowe narzędzie do kompleksowej oceny stanu środowiska

  Publication

  • M. Kursa-Mikołajczak
  • A. Kuczyńska
  • L. Wolska
  • J. Namieśnik

  - Year 2005

  W ostatnich latach obserwuje się wzrost znaczenia metod biologicznych, zarówno biomonitoringu jak i bioanalityki. Metody analityczne wykorzystujące materiał biologiczny stanowią coraz poważniejszą konkurencję dla klasycznych metod analitycznych.W obszarze metod bioanalitycznych na wyróżnienie zasługują testy biologiczne (biotesty). Konieczność wykonywania analiz wielu próbek środowiskowych w stosunkowo krótkim czasie doprowadziła...

• Pakiet oceny bezpieczeństwa systemów informacyjnych.

  Publication

  • H. Krawczyk
  • M. Wielgus

  - Year 2004

  Opracowano koncepcję oceny bezpieczeństwa w skali 6-cio poziomowej, umożliwiającej lokalizację mechanizmów zabezpieczeń w różnych warstwach architektury systemu, a także różnych procedur reagowania w przypadku naruszenia bezpieczeństwa. Przedstawiono założenia logiki rozmytej oraz diagram przejść stanów, przydatne do badania reakcji systemu na tzw. testy penetracyjne. Podano architekturę symulatora środowiskowego do oceny różnych...

• INFLUENCE OF CERAMIC COATING ON MECHANICAL PROPERTIES OF STAINLESS STEEL

  Publication

  • D. Czekaj
  • A. Lisińska-Czekaj
  • K. Krzysztofowicz

  - ARCHIVES OF METALLURGY AND MATERIALS - Year 2020

  Crystal structure and phase composition of stainless steel substrates (AISI 304 type) was studied and it was found that they adopted the cubic symmetry. The calculated elementary cell parameter for the mayor Fe-Ni phase (weight fraction 99%) was a = 3.593 Å, whereas the mean grain size was = 2932 Å. Morphology of the stainless steel substrate surface was studied with profilometry. Mechanical properties of the stainless steel...

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• Relationship between the betalain composition in Opuntia ficus indica and Beta vulgaris varieties and biological activity of their extracts

  Publication

  • I. Koss-Mikołajczyk
  • B. Kusznierewicz
  • A. Bartoszek-Pączkowska

  - Acta Biochimica Polonica - Year 2015

  Betalains are a class of pigments that are much less com- monly found in nature than anthocyanins or carotenoids. They occur only in a few edible plants such as red beetroot (Beta vulgaris), prickly pears (Opuntia ficus indica), amaranth (Amaranthus sp.) and some mushrooms. This group of pig- ments can be divided into two major groups: yellow vulgax- anthins and red betanins. Despite their structural similarity to compounds from...

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• Comparison of the Effects of Conventional and Alternative External Carbon Sources for Enhancing of the Denitrification Process

  Publication

  • M. Swinarski
  • J. Mąkinia
  • K. Czerwionka
  • M. Chrzanowska
  • J. Drewnowski

  - WATER ENVIRONMENT RESEARCH - Year 2009

  Food industry effluents are considered a potential alternative for methanol when seeking external carbon sources to enhance denitrification in municipal wastewater treatment plants (WWTPs). The aim of this study was to determine the immediate effects of dosing different carbon sources on the denitrification capability of process biomass from the "Wschod" WWTP in Gdansk (northern Poland). Five carbon sources, including settled wastewater,...

• The efficiency and reliability of pollutant removal in a hybrid constructed wetland with giant miscanthus and Jerusalem artichoke in Poland

  Publication

  • M. Marzec
  • M. Gizińska-Górna
  • K. Jóźwiakowski
  • A. Pytka-Woszczyło
  • A. Kowalczyk-Juśko
  • M. Gajewska

  - ECOLOGICAL ENGINEERING - Year 2019

  In this paper, we analysed the pollutant removal efficiency and reliability of a vertical and horizontal flow hybrid constructed wetland (CW) planted with giant miscanthus and Jerusalem artichoke. The wastewater treatment plant, located in south-eastern Poland, treated domestic sewage at an average flow rate of 1.2m3·d−1. The tests were carried out during. 5-years of operation of the sewage treatment plant (2011–2016). During this...

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• Antibiotic resistance in Staphylococcus aureus strains isolated from cows with mastitis in the eastern Poland and analysis of susceptibility of resistant strains to alternative non-antibiotic agents: lysostaphin, nisin and polymyxin B.

  Publication

  • P. Szweda
  • M. Schielmann
  • A. Frankowska
  • B. Kot
  • M. Zalewska

  - JOURNAL OF VETERINARY MEDICAL SCIENCE - Year 2014

  The aim of the studies was analysis of resistance of Staphylococcus aureus isolates from bovine mastitis in eastern part of Poland to a set of 20 antibiotics and three alternative agents: lysostaphin, nisin and polymyxin B. Eighty-six out of 123 examined isolates were susceptible to all of 20 tested antibiotics (70 %). The highest percentage of resistance was observed in the case of β-lactam antibiotics: amoxicillin (n=22, 17.9...

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• Forced vibrations in a dynamic system that is damped by a mechanism that trans-pass through its singular position

  Publication

  • K. Lipiński

  - Year 2017

  In the paper, vibrations of a hybrid multibody-continuous system are investigated. For all the mechanical devices, effective damping methods are crucial in the design process. To obtain it, installation of viscous dampers or elasto-viscous elements is dominant. In the paper, an alternative method is investigated. It is based on modal disparity. To describe the method briefly, when structural damping is present in continuous systems,...