Search results for: FOUCAULT'S PENDULUM

• EH36 steel for shipbuilding (plate thicnkness 30 mm) - CMOD - force record, a0/W = 0.5

  Open Research Data

  open access

  • J. Kowalski
  • J. Kozak

  - series: EH36 steel for shipbuilding

  The basic method of ductility designation of structural steels is the Charpy impact test. The test consists of a single strike of the specimen using a Charpy pendulum. Its result is the value of work necessary to break a specimen at a test temperature. Despite its many advantages, such as its short implementation time and low costs, it has its disadvantages,...

• Database of the thermal ablation model

  Open Research Data

  open access

  • A. Bartłomiejczyk
  • H. Leszczyński
  • A. Poliński
  • G. Graff

  Thermal ablation is a low invasive technique which eliminates cancerous tissue using high temperature. The presented database was used to show the temperature distribution for t=600[s] in two cases: when the value of the thermal conductivity of tissue k(x;T) is constant and for the variable k(x;T). In addition, using these data we showed the difference...

• Measurements of ultrasonic bulk and guided wave propagation in additively manufactured cubes and plates obtained by ultrasonic pulse velocity analyzer and scanning laser vibrometry

  Open Research Data

  open access

  • E. Wojtczak
  • M. Rucka
  • A. Andrzejewska-Sroka

  The DataSet contains the results of measurements of ultrasonic wave propagation in additively manufactured samples made of polylactic acid (PLA). Three types of raster angles in two consecutive layers were assumed: 0°/90° (#1), 45°/-45° (#2) and 90°/90° (#3) with respect to the x-axis. For each printing variants a cubic sample (#C1-3) with dimensions...

• Synthesis and reactivity of 2,2,4,4-Tetrakis(tri-tertbutoxysilane-thiolato)-1,3,2,4-dithiadistannetane - crystal and molecular structures of two polymorphic forms

  Publication

  • M. Kloskowska
  • A. Konitz
  • W. Wojnowski
  • B. Becker

  - ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE - Year 2006

  Tytułowy związek [Sn(μ-S){SSi(OtBu)3}2]2 (1), zawierający dwa, 4-koordynacyjne atomy cyny, krystalizuje w dwóch odmianach polimorficznych. Forma ortorombowa-1a, została otrzymana w reakcji (tBuO)3SiSH i Et3N z SnCl2, podczas gdy forma trójskośna-1b, w reakcji z SnCl4 jako substratem. Struktura krystaliczna i cząsteczkowa obydwu odmian polimorficznych została wyznaczona przez badania metodą Rentgenowskiej Analizy Strukturalnej,...

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• On some Zarankiewicz numbers and bipartite Ramsey Numbers for Quadrilateral

  Publication

  • J. Dybizbański
  • T. Dzido
  • S. Radziszowski

  - ARS COMBINATORIA - Year 2015

  The Zarankiewicz number z ( m, n ; s, t ) is the maximum number of edges in a subgraph of K m,n that does not contain K s,t as a subgraph. The bipartite Ramsey number b ( n 1 , · · · , n k ) is the least positive integer b such that any coloring of the edges of K b,b with k colors will result in a monochromatic copy of K n i ,n i in the i -th color, for some i , 1 ≤ i ≤ k . If n i = m for all i , then we denote this number by b k ( m )....

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• Buckling and shape control of prestressable trusses using optimum number of actuators

  Publication

  • A. Manguri
  • N. Saeed
  • M. Szczepański
  • R. Jankowski

  - Scientific Reports - Year 2023

  This paper describes a method to control the nodal displacement of prestressable truss structures within the desired domains. At the same time, the stress in all members is unleashed to take any value between the allowable tensile stress and critical buckling stress. The shape and stresses are controlled by actuating the most active members. The technique considers the members’ initial crookedness, residual stresses, and slenderness...

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• Komputerowe projektowanie materiałów 2022/2023

  e-Learning Courses

  • J. Dziedzic

  Kurs Komputerowe projektowanie materiałów, specjalność: Inżynieria materiałów funkcjonalnych (WFTiMS), II stopnia, stacjonarne, 2021/2022 - letni (obecnie sem. 2)

• John Stuard Mill i pojęcie ekonomii politycznej.

  Publication

  • S. Zabieglik

  - Zeszyty Naukowe Politechniki Gdańskiej. Filozofia - Year 2003

  Przedstawiono podstawowe założenia filozoficzne ekonomii politycznej J. S. Milla, wyłożone w eseju On the definition of Political Economy.

• On the complexity of distributed graph coloring with local minimality constraints

  Publication

  • C. Gavoille
  • R. Klasing
  • A. Kosowski
  • Ł. Kuszner
  • A. Navarra

  - NETWORKS - Year 2009

  Artykuł traktuje o zachłannym kolorowaniu grafów w modelu rozproszonym. Omówiono algorytmy rozproszone, dające w wyniku pokolorowanie spełniające warunki dla pokolorowań sekwencyjnych typu S oraz Largest-First (LF). Udowodniono również, że każda rozproszona implementacja algorytmu S wymaga co najmniej Omega(log n / log log n) rund, a algorytmu LF co najmniej Omega (n^{1/2}) rund, gdzie n oznacza liczbę wierzchołków grafu.

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• Classification of homotopy classes of equivariant gradient maps

  Publication

  • K. Gęba
  • S. Rybicki

  - Year 2005

  Niech V będzie ortogonalną reprezentacją zwartej grupy Liego Gi niech S(V),D(V) oznaczają sferę jednostkową i kulę jednostkową V.Jeżeli F jest G-niezmienniczą funkcją rzeczywistą klasy C^1 na Vto mówimy, że grad F (gradient F) jest dopuszczalny, jeżeli(grad F)(x) jest różny od zera dla x należących do S(V). Pracapoświęcona jest homotopijnej klasyfikacji dopuszczalnychG-niezmienniczych odwzorowań gradientowych.

• Karolina Zielińska-Dąbkowska dr hab. inż. arch.

  People

  Department of Urban Architecture and Waterscapes

  Karolina M. Zielinska-Dabkowska, Ph.D., Eng. Arch., M. Arch., is an Assistant Professor at the Faculty of Architecture of Gdańsk University of Technology (GUT). In 2002, she completed her studies of Architecture and Urban Planning at Gdańsk University of Technology (Gdańsk Tech) and in 2004, Architectural Engineering at the University of Applied Sciences and Arts (HAWK) in Hildesheim, Germany. After graduation, she worked for several...

• Degradation of ferritic X10CrAlSi18 stainless steel caused by slurry

  Publication

  • A. Krella
  • M. Buszko
  • G. Gajowiec

  - ENGINEERING FAILURE ANALYSIS - Year 2020

  The slurry erosion tests of ferritic X10CrAlSi18 steel were carried out using a slurry pot device. In order to investigate the erosion process, two series of tests were performed: first one with a constant impact velocity of 5 m/s, 7 m/s and 9 m/s and the second one, during which the impact velocity was changed after every exposure. During each test, an influence of test conditions on volume loss, surface hardness and roughness...

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• The Influence of Impact Velocity on Stresses and Failure of S355j2 Steel Under Slurry Erosion Conditions

  Publication

  • D. E. Zakrzewska
  • M. H. Buszko

  - Advances in Science and Technology Research Journal - Year 2024

  The purpose of this work was to determine the essence of the influence of the impact velocity (5, 7, and 9 m/s) on Hertzian stresses and the erosion mechanism of ferritic-pearlitic S355J2 steel. The investigations were carried out using a slurry pot tester. S355J2 steel showed a strong sensitivity to changes in impact velocity. A significant increase in erosion rate was observed at a velocity of 9 m/s. This increase was 5-fold...

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• 3D model of osteoarthritic (OA) knee joint for analysis of the medial meniscus biomechanics - input text file for computation

  Open Research Data

  open access

  • K. Daszkiewicz
  • P. Luczkiewicz

  The finite element method was used to simulate the stance phase of the gait cycle. An intact knee model was prepared based on magnetic resonance scans of the left knee joint of a healthy volunteer. In the OA model thickness of articular cartilage and material parameters of the cartilage and menisci were reduced to simulate degenerative changes in the...

• 3D knee model G with reduced thickness of articular cartilage - input text file for computation

  Open Research Data

  open access

  • K. Daszkiewicz

  The finite element method was used to simulate the stance phase of the gait cycle. An intact knee model was prepared based on magnetic resonance scans of the left knee joint of a healthy volunteer. In the model G articular cartilage thickness was reduced in specific areas to simulate degenerative changes in the medial knee osteoarthritis. The file was...

• Model dynamic electrochemical impedance spectroscopy (DEIS) results obtained with various DC polarization rates

  Open Research Data

  open access

  • J. Wysocka
  • J. Ryl

  The dataset contains results of model dynamic electrochemical impedance spectroscopy studies carried out on a setup of 10 diodes in series, which were connected in parallel with a condenser. The impedance data were acquired every 1 s (the analytic window length for Fourier Transform was 1 s). The model system was polarized between 0 and +8 V with DEIS...

• 3D knee model M with decreased material parameters of the cartilage and menisci - input text file for computation

  Open Research Data

  open access

  • K. Daszkiewicz
  • P. Luczkiewicz

  The finite element method was used to simulate the stance phase of the gait cycle. An intact knee model was prepared based on magnetic resonance scans of the left knee joint of a healthy volunteer. In the model M the material parameters of cartilage and menisci were reduced to simulate degenerative changes in the medial knee osteoarthritis. The file...

• Marek Wirkus dr hab. inż.

  People

  M. Sc. (1977 in the field of mechanical engineering technology and production management); Ph.D. degree in the field of Economic Sciences (1990; production management using IT techniques), habilitated doctor in the field of Economic Sciences, in the discipline of Management Sciences (2007 in the area of managing the portfolio of innovative projects); Co-creator of the Faculty of Management and Economics (1993); Vice Dean for Continuing...

• Adaptive Expectation Maximization Smoothing (AEMS) inverse technique forindirect fish target strenght estimation. W: [CD-ROM] Full Papers. 6th ICES Symposium on Acoustics in Fisheries and Aquatic Ecology. Montpellier, 10-14 June 2002. [Montpellier: Ifremer]**2002, [6 s.] 5 rys. bibliogr. 5 poz. Zastosowanie adaptacyjnej metody EMS do pośredniej estymacji siły celu ryb.

  Publication

  • M. Moszyński

  - Year 2002

  W pracy przedstawiono modyfikację statystycznej metody EMS (ang. Expecta-tion, Maximization, Smoothing) stosowanej w zagadnienia odwrotnych, polega-jącą na iteracyjnym rozwiązaniu równania Fredholma. Pokazano jej zastosowa-nie do pośredniej estymacji siły celu ryb stosowanej dla danych pozyskanychprzez hydroakustyczne systemy jednowiązkowe wykorzystywane w przeszukiwa-niach akustycznych. Wyniki porównano z rezultatami uzyskanymi...

• Bis(ć-di-tert-butylphosphido)bis[(triethylphospine)palladium(I)](Pd-Pd). A-cta Crist. Sec. E [online]**2003 vol. 59 [dostęp 31 May 2003] s. 376-377, 1 rys. 1 tab. bibliogr. 13 poz. Dost. w Intern. http://journals.iucr.org/e.Bis(ć-di-tert-butylphosphido)bis[(triethylphospine)palladium(I)](Pd-Pd).

  Publication

  • U. Englert
  • E. Matern
  • J. Olkowska-Oetzel
  • J. Pikies

  - Year 2003

  Bis.... powstaje w reakcji di-tert-butylfosfino-fosfanylideno-ĺ4-fosforanu zchlorkiem di-trietylofosfinopalladu(II) w obecności naftalidku sodu. Krystalizuje w grupie przestrzennej P1.

• Nadzorowanie drgań układu nośnego robota przemysłowego IRB-6 za pomocą ste-rowania modalnego przy energetycznym wskaźniku jakości. W: Zagadnienia ana- lizy modalnej konstrukcji mechanicznych. Praca zbiorowa pod red. T. Uhla. Kraraków: Kated. Robotyki i Dynam. Masz. AGH**2003 s. 115-122, 2 rys. 1 tab. bibliogr. 4 poz.

  Publication

  • K. J. Kaliński
  • K. Jasiński

  - Year 2003

  W pracy rozważa się drgania modelowanego dyskretnie niestacjonarnego układunośnego manipulatora IRB6 metodą sztywnych elementów skończonych. Do nadzo-rowania drgań wykorzystano algorytm sterowania optymalnego przy energetycz-nym wskaźniku jakości w dziedzinie współrzędnych modalnych. Uwzględnia on zmianę w czasie, względem trajektorii ruchu zadanego, energii potencjalnej, kinetycznej oraz energii sygnału sterującego.

• Morphological and molecular genetic diversity analysis using SSR markers in Jackfruit (Artocarpus heterophyllus Lam.) genotypes for pulp colour

  Publication

  • K. Kavya
  • S. Shyamalamma
  • S. Gayatri
  • K. Kondaka

  - Indian Journal of Agricultural Research - Year 2019

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• Reflectance Measurements and iCone Calorimeter Burning Results of Charcoals Derived from Lake Żabińskie (North-Eastern Poland)

  Open Research Data

  open access

  • A. Bonk
  • C. Belcher
  • A. Crawford

  The dataset presents the results of litter burning experiments using an iCone calorimeter to assess the flammability of the major tree species in the Lake Żabińskie catchment (NE Poland) and links this to the heat release during burning to understand the influence of fire and its effects on ecosystems. Samples of litter from Betula pendula, Pinus sylvestris,...

• DFT and NBO theoretical study of protonation of tri-tert-butoxysilanethiol and its anion

  Publication

  • J. Chojnacki

  - POLYHEDRON - Year 2008

  Wykonano obliczenia kwantowo-chemiczne metodą DFT dla tri-tert-butoksysilanotiolu oraz jego protonowanych i deprotonowanych form, zarówno na atomie tlenu jak i siarki. Przeanalizowano bilans energetyczny dla protonowania anionu w próżni i w fazie wodnej (stosując model IPCM). Zaobserwowano skrócenie wiązania Si-S w wyniku protonowania na atomie tlenu. Zmiany długości wiązań Si-O i Si-S zostały zinterpretowane w oparciu o analizę...

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• Syntheses, spectroscopic and structural properties of phenoxysilyl compounds: X-ray structures, FT-IR and DFT calculations

  Publication

  • A. Jabłońska
  • Ł. Ponikiewski
  • K. Ejsmont
  • A. Herman
  • A. Dołęga

  - JOURNAL OF MOLECULAR STRUCTURE - Year 2013

  The reaction of silicon disulfide with alkylphenols leads to tetraphenoxysilane, cyclodisilthiane and silanethiol. The products of the reaction of silicon disulfide with phenols are characterized by FT-IR, NMR, X-ray diffraction and DFT calculations. The intramolecular interactions in the compounds are mainly XH---π (X = C, S) whereas the intermolecular interactions are either very weak CH---π/CH---O contacts found in aryloxysilane...

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• Convenient Synthesis of Functionalized Unsymmetrical Vinyl Disulfides and Their Inverse Electron-Demand Hetero-Diels-Alder Reaction

  Publication

  • B. Jędrzejewski
  • M. Musiejuk
  • J. Doroszuk
  • D. Witt

  - Materials - Year 2021

  The simple, convenient, and efficient methods for the preparation of unsymmetrical vinyl disulfides with additional functional groups under mild conditions with moderate to high yields were designed. The developed methods include the reaction of S-vinyl phosphorodithioate with thiotosylates or S-vinyl thiotosylate with thiols. The designed methods allow for the synthesis of unsymmetrical vinyl disulfides with additional functionalities...

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• Influence of deformation velocity on mechanical properties of high strength structural steels.

  Publication

  • H. Bugłacki
  • M. Smajdor

  - Year 2004

  W referacie przedstawiono wyniki badań własności mechanicznych stali wysokiej wytrzymałości przeznaczonych na spawane konstrukcje okrętowe w zależności od prędkości odkształcenia. Badania były prowadzone w Akademii Marynarki Wojennej oraz w Politechnice Gdańskiej przy współudziale Uniwersytetu Technicznego w Rostocku podczas opracowywania charakterystyk tych stali dla potrzeb polskiego przemysłu okrętowego. Uwzględnienie obciążeń...

• MAX phase ternary carbide derived 2-D ceramic nanostructures [CDCN] as chemically interactive functional fillers for damage tolerant epoxy polymer nanocomposites

  Publication

  • S. Vaisakh
  • K. Mahesh
  • S. Balanand
  • R. Metz
  • M. Hassanzadeh
  • S. Ananthakumar
  • B. Santhosh

  - RSC Advances - Year 2015

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• Chapter 7: Engineering Thermodynamics and the Carnot Cycle

  Publication

  • M. Collins
  • J. Stąsiek
  • J. Mikielewicz

  - Year 2016

  The chapter presents information about thermodynamics and thermodynamic cycles, especially the history and meaning of Carnot Cycle as well as P-v and T-s Diagrams

• Uwarunkowania rozwojowe w telekomunikacji satelitarnej

  Publication

  • R. Katulski
  • M. Mikołajski

  - Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne - Year 2003

  Przeanalizowano przydatność rozwiązania niskoorbitowego LEO S-UMTS oraz wysokoorbitowego GEO-GMR. Uzasadniono przydatność w przyszłości formy geostacjonarnej GEO.

• Single Bit Errors in Ethernet II frames

  Open Research Data

  open access

  • M. Nurczyński
  • M. Szymański
  • S. Olewniczak

  Check our final report for a detailed sumary on how the data was gathered and processed ("Methods" section of the report.pdf file).In the report, there are 7 different datasets mentionted. Below you can find specific information on how to navigate all the folders and construct those datasets from multiple files. 

• The homotopy type of the space of gradient vector fields on the two-dimensional disc

  Publication

  • P. Bartłomiejczyk
  • P. Nowak-Przygodzki

  - GLASGOW MATHEMATICAL JOURNAL - Year 2012

  We prove that the inclusion of the space of gradient vector fields into the space of all vector fields on D^2 non-vanishing in S^1 is a homotopy equivalence

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• Anna Baj-Rogowska dr

  People

  Department of Informatics in Management

    Anna Baj-Rogowska is employed as an assistant professor at the Department of Informatics in Management at the Faculty of Management and Economics, Gdańsk University of Technology. Her higher education is connected with the University of Gdańsk, where she graduated from a master's degree in business informatics, doctoral studies and then obtained a PhD degree in economics in management science (Department of Business Informatics...

• Badania jakości transmisji z wykorzystaniem turbokodera o zmniejszonej liczbie stanów

  Publication

  • A. Marczak

  - Year 2007

  W referacie przedstawiono budowę kodera i dekodera turbokodu o zmniejszonej liczbie stanów. Zaprezentowano wyniki badań symulacyjnych jakości transmisji z wykorzystaniem tego turbokodera oraz porównano je z wynikami uzyskanymi w przypadku zastosowania standardowego w systemie UMTS turbokodera i kodera splotowego. Badania symulacyjne zostały przeprowadzone w środowisku propagacyjnym miejskim, wokołobudynkowym dla dwóch szybkości...

• Bounds on the vertex-edge domination number of a tree

  Publication

  • B. Krishnakumari
  • Y. B. Venkatakrishnan
  • M. Krzywkowski

  - COMPTES RENDUS MATHEMATIQUE - Year 2014

  A vertex-edge dominating set of a graph $G$ is a set $D$ of vertices of $G$ such that every edge of $G$ is incident with a vertex of $D$ or a vertex adjacent to a vertex of $D$. The vertex-edge domination number of a graph $G$, denoted by $\gamma_{ve}(T)$, is the minimum cardinality of a vertex-edge dominating set of $G$. We prove that for every tree $T$ of order $n \ge 3$ with $l$ leaves and $s$ support vertices we have $(n-l-s+3)/4...

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• Marcinkiewicz Averages of Smooth Orthogonal Projections on Sphere

  Publication

  • M. Bownik
  • K. Dziedziul
  • A. Kamont

  - JOURNAL OF FOURIER ANALYSIS AND APPLICATIONS - Year 2022

  We construct a single smooth orthogonal projection with desired localization whose average under a group action yields the decomposition of the identity operator. For any full rank lattice \Gamma ⊂ R^d , a smooth projection is localized in a neighborhood of an arbitrary precompact fundamental domain R^d / \Gamma. We also show the existence of a highly localized smooth orthogonal projection, whose Marcinkiewicz average under the...

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• Sulfurization of phosphanylphosphinidene ligand: Access to phosphinothioyltrithiophosphonato platinum(II) complexes

  Publication

  • A. Ordyszewska
  • N. Szynkiewicz
  • J. Chojnacki
  • R. Grubba
  • J. Pikies

  - INORGANICA CHIMICA ACTA - Year 2021

  The reactivity of phosphanylphosphinidene Pt(0) complexes [DppePt(η2-P–PtBu2)] (1) and [(pTol3P)2Pt(η2-P–PtBu2)] (2) toward sulfur was studied. Reactions of 1 and 2 with an excess of sulfur led to the formation of the first transition metal complexes 3 and 4 with phosphinothioyltrithiophosphonato ligands with the formula [tBu2P(=S)–P(=S)S2]2-. In contrast to previous reports on the phosphanylphosphinidene moiety sulfurization,...

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• Ocena jakości transmisji danych w interfejsie radiowym systemu UMTS z wykorzystaniem dostępnych metod kodowania kanałowego.

  Publication

  • A. Marczak
  • R. Niski

  - Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej - Year 2004

  W referacie została przedstawiona budowa koderów splotowych i turbo-kodera zastosowanych w systemie radiokomunikacji ruchomej trzeciej generacji UMTS. Przedstawiono i porównano wyniki badań symulacyjnych jakości transmisji danych w interfejsie radiowym z transmisją dupleksową z podziałem częstotliwości WCMA/FDD w łączu ''w górę'' z szybkościami transmisji 144kb/s i384kb/s z wykorzystaniem turbo-kodera i kodera splotowego o sprawności...

• Badania jakości transmisji danych w systemie UMTS z wykorzystaniem turbokodowania

  Publication

  • A. Marczak
  • D. Rutkowski

  - Year 2005

  W referacie została przedstawiona budowa kodera oraz dekodera turbokodu pracującego w oparciu o algorytm SOVA w systemie radiokomunikacyjnym trzeciej generacji UMTS. W dekoderze turbokodu został zastosowany mechanizm redukujący liczbę iteracji. Omówiono i porównano wyniki badań symulacyjnych jakości transmisji w przypadku zastosowania mechanizmu redukcji liczby iteracji turbodekodera i bez tego mechanizmu. Badania zostały przeprowadzone...

• Wavelet transform analysis to assess oscillations in pial artery pulsation at the human cardiac frequency

  Publication

  • P. J. Winklewski
  • M. Gruszecki
  • J. Wolf
  • E. Świerblewska
  • K. Kunicka
  • M. Wszędybył-Winklewska
  • W. Gumiński
  • J. Zabulewicz
  • A. F. Frydrychowski
  • L. Bieniaszewski... and 2 others

  - MICROVASCULAR RESEARCH - Year 2015

  Pial artery adjustments to changes in blood pressure (BP)may last only seconds in humans. Using a novelmethod called near-infrared transillumination backscattering sounding (NIR-T/BSS) that allows for the non-invasive measurement of pial artery pulsation (cc-TQ) in humans, we aimed to assess the relationship between spontaneous oscillations in BP and cc-TQ at frequencies between 0.5 Hz and 5 Hz. We hypothesized that analysis of...

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• Mitigation effect of face shield to reduce SARS-CoV-2 airborne transmission risk: Preliminary simulations based on computed tomography

  Publication

  • K. Tesch
  • A. Skorek
  • D. Tretiakow

  - ENVIRONMENTAL RESEARCH - Year 2021

  We aimed to develop a model to quantitatively assess the potential effectiveness of face shield (visor) in reducing airborne transmission risk of the novel coronavirus SARS-CoV-2 during the current COVID-19 pandemic using the computational fluid dynamics (CFD) method. The studies with and without face shield in both an infected and healthy person have been considered in indoor environment simulation. In addition to the influence...

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• Development and evaluation of thermosensitive hydrogels with binary mixture of Scutellariae baicalensis radix extract and chitosan for periodontal diseases treatment.

  Publication

  • J. Chanaj-Kaczmarek

  - INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES - Year 2021

  Scutellaria baicalensis root displays anti-inflammatory and antibacterial properties due to the presence of flavonoids, particularly baicalin, baicalein, and wogonin. Our work aimed at developing thermosensitive hydrogels containing a binary mixture of S. baicalensis radix lyophilized extract and chitosan as a novel approach for periodontal diseases treatment....

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• Bee Bread Exhibits Higher Antimicrobial Potential Compared to Bee Pollen

  Publication

  • K. Matejczuk
  • O. Otłowska
  • R. Worobo
  • P. Szweda

  - Antibiotics-Basel - Year 2021

  This study aimed at investigation of the antimicrobial potential of ethanolic extracts of bee bread (BB) and bee pollen (BP) and suspensions of these products in MHB (Mueller Hinton Broth). We covered 30 samples of BP and 19 samples of BB harvested in Polish apiaries. Slightly lower activity was observed against Gram-negative bacteria compared to Gram-positive staphylococci. BB extracts exhibited higher inhibitory potential with...

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• Mitigation effect of face shield to reduce SARS-CoV-2 airborne transmission risk: Preliminary simulations based on computed tomography

  Publication

  • D. Tretiakov
  • K. Tesch
  • A. Skorek
  • D. Tretiakow

  - ENVIRONMENTAL RESEARCH - Year 2021

  We aimed to develop a model to quantitatively assess the potential effectiveness of face shield (visor) in reducing airborne transmission risk of the novel coronavirus SARS-CoV-2 during the current COVID-19 pandemic using the computational fluid dynamics (CFD) method. The studies with and without face shield in both an infected and healthy person have been considered in indoor environment simulation. In addition to the influence...

  Full text available to download

• Corrosion today

  Publication

  • K. Darowicki

  - JOURNAL OF SOLID STATE ELECTROCHEMISTRY - Year 2009

  Omówiono problemy korozyjne oraz warunki współpracy międzynarodowej z uwzględnieniem osiągnieć prof. S. Mroweca, prof. K. Kurzydłowskiego i prof. J. Flisa.

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• Propeller-Like Chirality of Methyl-Tris (2,6-diisopropylphenoxy)Silylsulfide

  Publication

  • A. Herman
  • S. Godlewska
  • Ł. Ponikiewski
  • T. Kruczyński
  • A. Dołęga

  - Silicon - Year 2016

  Two new methylsilylsulfides are synthesized. Propeller-like chirality is described for triaryloxysilanethiol and its methyl derivative. S-methylation of the silanethiol lowers the overall symmetry of the unit cell.

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• Studies on the charge density distribution in p-substituted phenylnitrenium cation

  Publication

  • M. Przybyłek

  - Ekologia i Technika - Year 2013

  Aniline and its derivatives are known to be mutagenic. This activity is caused by the formation of phenylnitrenium cations during aniline oxidation. Reactivity of the positively charged chemical species can be measured by means of s+ substituent constant. In this paper charge density distribution in p-substituted nitrenium cations and reactivity indices such as, hardness η, electronegativity χ , and electrophilicily ω were analyzed....

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• A High-Efficient Measurement System With Optimization Feature for Prototype CMOS Image Sensors

  Publication

  • M. Kłosowski
  • J. Jakusz
  • W. Jendernalik
  • G. Blakiewicz
  • S. Szczepański
  • S. Kozieł

  - IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT - Year 2018

  In this paper, a gray-scale CMOS image sensor (CIS) characterization system with an optimization feature has been proposed. By using a very fast and precise control of light intensity, based on the pulsewidth-modulation method, it is avoided to measure the illuminance every time. These features accelerate the multicriteria CIS optimization requiring many thousands of measurements. The system throughput is 2.5 Gb/s, which allows...

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• The XRD diffraction patterns of Ce0.8La0.2O2 and CeO2 prepared using soft template method

  Open Research Data

  open access

  • P. Błaszczak
  • B. Bochentyn

  The dataset includes XRD patterns of Ce0.8La0.2O2-s and CeO2-s nanopowders (nanoparticles) prepared using soft template method. CTAB was used as a micelle-based templating agent. The powders were precipitated from aqueous nitrate solution using NaOH solution and 250xCMC (critcal micelle concentration) of CTAB. Precipitates were heated up to 90oC, centrifuged...

• Rozdział 3.1.1. Przestrzenne formy ochrony przyrody. W: [Praca zbiorowa]Materiały do monografii przyrodniczej regionu gdańskiego. Gdańsk: Marpress **2002 s. 57-66, 4 tab. Tom 8 Diagnoza stanu i koncepcja ochrony środowiska przyrodniczo-kulturowe- go w województwie pomorskim. Diagnosis of natural-cultural environment´scondition and the idea of its protection in Pomeranian Voivodship. Red. A.Kostarczyk, M. Przewoźniak.

  Publication

  • M. Przewoźniak

  - Year 2002

  ...