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Search results for: SFR. LTE
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Microwave absorption study on (Bi, Pb)-Sr-Ca-Cu-O granular superconductors
PublicationNadprzewodniki granulaste są bardzo ciekawymi materiałami dzięki temu, że zawierają dużą ilość złącz Josephsona. W pracy przedstawiono absorpcję mikrofalową w granulastych nadprzewodnikach (Bi, Pb)-Sr-Ca-Cu-O zawierających granule 2201, 2212 i 2223 umieszczone w matrycy dielektrycznej. Obserwowano dwustopniowe przejście do stanu nadprzewodzącego. Sygnał MMMA obserwowano poniżej temperatury T1.
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Synthesis, single crystal growth and properties of Sr 5 Pb 3 ZnO 12
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The microstructure effect on the electrical and optical properties of undoped and Sr-doped SmCoO3 thin films.
PublicationW pracy przedstawiono elektryczne i optyczne właściwości niedomieszkowanego i domieszkowanego Sr SmCoO3 cienkich filmów. Gęste i przezroczyste filmy o grubościach 80-100nm były przygotowane na szafirze metodą nanoszenia wirowego ciekłych polimerów. Filmy były syntezowane w temperaturach od 500 do 800C co umożliwiło otrzymanie różnych mikrostruktur. Elektryczne właściwości filmów były mierzone w funkcji temperatury. Domieszkowanie...
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Determination of the ionic conductivity of Sr-doped lanthanum manganite by modified Hebb–Wagner technique
PublicationThe Hebb–Wagne rpolarization method with the electron blocking electrode has been discussed in this paper in aim to determine a partial ionic conductivity of Sr-doped lanthanum manganite.The “limiting current” in the proposed system was measured using the two-point DC technique with additional Pt electrode between LSM and blocking electrode.The electrochemical model based on bulk diffusion processes and Boltzmann statistics has...
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Structural and electrical properties of Sr(Ti,Fe)O3-δ materials for SOFC cathodes
PublicationW niniejszym artykule, dwa związki SrTiO3 domieszkowanego Fe przebadano pod względem przydatności na katody w tlenkowych ogniwach paliwowych. SrTi0.65Fe0.35O3 i SrTi0.5Fe0.5O3 zostały przebadane pod względem reaktywności chemicznej z elektrolitem YSZ. Stwierdzono, że przewodnictwo elektryczne tych związków jest stosunkowo niskie: 0,4 S/cm i 2 S/cm odpowiednio dla STF35 i STF50.
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New Transparent Flame-Retardant (FR) Coatings Based on Epoxy-Aluminum Hypophosphite Nanocomposites
PublicationThe present study investigated the flame-retardant (FR) effect of transparent epoxy coating containing aluminum hypophosphite (AHP) nanoparticles (NPs) on polylactic acid (PLA) sheets used as a typical model of combustible polymeric material. First, AHP NPs (≤60 nm) were prepared by a specific two-stage wet milling process and deeply analyzed (morphology, thermal/mechanisms of degradation under nitrogen and air). The thermal properties...
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Demonstrator technologii wykrywania sygnałów z widmem rozproszonym poniżej poziomu szumu
PublicationW artykule opisano budowę i zasadę działania laboratoryjnego stanowiska do wykrywania sygnałów z widmem rozproszonym o małej mocy. Ponadto przedstawiono charakterystykę oprogramowania, realizującego cyfrowe przetwarzanie sygnałów oraz stanowiącego interfejs użytkownika dla operatora stanowiska. Podano również wybrane wyniki przeprowadzonych badań, które pozwalają na oszacowanie możliwości detekcji przy założonym stosunku mocy sygnału...
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A subset of two adherence systems, acute pro-inflammatory pap genes and invasion coding dra, fim, or sfa, increases the risk of Escherichia coli translocation to the bloodstream
PublicationAn analysis of the phylogenetic distribution and virulence genes of Escherichia coli isolates which predispose this bacteria to translocate from the urinary tract to the bloodstream is presented. One-dimensional analysis indicated that the occurrence of P fimbriae and α-hemolysin coding genes is more frequent among the E. coli which cause bacteremia. However, a two-dimensional analysis revealed that a combination of genes coding...
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Immediate and late benefits of treating very elderly people with hypertension: results from active treatment extension to Hypertension in the Very Elderly randomised controlled trial
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Evidence for widespread occurrence of copper in Late Neolithic Poland? A deposit of Funnel Beaker Culture bone products at site 2 in Osłonki (Kuyavia, central Poland)
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Escherichia coli K-12 suppressor-free mutants lacking early glycosyltransferases and late acyltransferases. Minimal lipopolysaccharide structure and induction of envelope stress response.
PublicationTo elucidate the minimal lipopolysaccharide (LPS) structure needed for the viability of Escherichia coli, suppressor-free strains lacking either the 3-deoxy-d-manno-oct-2-ulosonic acid transferase waaA gene or derivatives of the heptosyltransferase I waaC deletion with lack of one or all late acyltransferases (lpxL/M/P) and/or various outer membrane biogenesis factors were constructed. Δ(waaC lpxL lpxM lpxP) and waaA mutants exhibited...
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Wojciech Siwicki dr inż.
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Przyszłość energetyki jądrowej na świecie
PublicationProblemy dostępności paliwa jądrowego i składowania odpadów radioaktywnych skłaniają do przemian w technologii reaktorów jądrowych w kierunku generacji IV. Równolegle obserwuje się rozwój reaktorów małej i średniej mocy. Obie ścieżki wydają się być słuszne i obiecujące. W przypadku małych reaktorów jądrowych, pierwsze instalacje mogą powstać w najbliższych pięciu latach, niektóre z nich mogą zaliczać się do reaktorów IV generacji....
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Intersentia Ltd
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Wydawnictwo LTW
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Vital and health statistics. Ser. 1: Programs and collection procedures
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Ryszard Katulski prof. dr hab. inż.
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Possible effects of the 1984 St. Clair River ice jam on bed changes
PublicationThis study examines the possible effect of the record ice jam of 1984 in the St. Clair River on river bed changes and conveyance. Numerical simulations were made to examine the flow and bed shear stresses during the jam formation and release periods. Simulation results indicate that the ice jam in the river did not cause a significant increase in bed shear stress compared to pre- and post-jam open water conditions. The insignificant...
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Hardening of (Pb,Cd)Te Crystal Lattice with an Increasing CdTe Content in the Solid Solution
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Le musicien ou un personnage en devenir. Be-bop de Christian Gailly
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Le masque au théâtre CRICOT1 : du geste pictural au geste « opératoire »
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Mechanism of hopping conduction in Be–Fe–Al–Te–O semiconducting glasses and glass–ceramics
PublicationElectrical properties of beryllium-alumino-tellurite glasses and glass–ceramics doped with iron ions were studied using impedance spectroscopy. The conductivity was measured over a wide frequency range from 10 mHz to 1 MHz and the temperature range from 213 to 473 K. The D.C. conductivity values showed a correlation with the Fe-ion concentration and ratio of iron ions on different valence states in the samples. On the basis of...
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Sb measurements in a Bi-Sb-Te ceramics materials
Open Research DataThe influence of the temperature of the annealing of ceramic materials with the composition Bi0.5Sb1.5Te3O9 was investigated. The materials were annealed at the temperature of 440 degrees Celsius and 450 degrees Celsius. There were no significant differences in the valence of antimony and other elements.
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The electrical conductivity of pristine, La-, and Nb-doped SFM measured in air and hydrogen atmospheres
Open Research DataThis dataset consists of an Excel sheet with the result of DC4W method of electrical measurements. The measurements were conducted on pristine strontium ferrite molubdate as well as ones doped with La and Nb. Additionally two samples co-doped with La and Ni/Co were analyzed. Pellets were prepared by high temperature sintering at 1400 deg. C, then cut...
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Power of the SMR brainwaves in the mental imagery experiment in sport: the "Your Home Venue" scenario.
Open Research DataThe data were collected to perform research on the neural oscillation during mental imagery in sport. The study's main aim was to examine the cortical correlations of imagery depending on instructional modality (guided vs self-produced) using various sport-related scripts. The research was based on the EEG signals recorded during the session with the...
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Micro Arc Oxidation of Mechanically Alloyed Binary Zn-1X (X = Mg or Sr) Alloys
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Magnetic Field Influence on the Superconducting Transition in Granular (BiPb)-Sr-Ca-Cu-O Superconductors
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Maczużnik nasięźrzałowy Cordyceps ophioglossoides (Erenb.: Fr.) Link w okolicy Gdańska (województwo pomorskie).
PublicationW artykule opisano dwa stanowiska maczużnika nasięźrzałowego Cordyceps ophioglossoides, stwierdzone w okolicy Gdańska. Opisano siedlisko tego grzyba - wymieniono typy lasów i rodzaje drzewostanów, rośliny runa oraz macromycetes towarzyszące omawianemu gatunkowi grzyba. Omówiono jego rozsiedlenie na świecie i w kraju. Opisano budowę owocników maczużnika, jego biologię i ekologię, a także jego żywiciela - jeleniaka sarniego. Podkreślono,...
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Electronic structure of intertwined kagome, honeycomb, and triangular sublattices of the intermetallics MCo2Al9 ( M = Sr, Ba)
PublicationIntermetallics are an important playground to stabilize a large variety of physical phenomena, arising from their complex crystal structure. The ease of their chemical tunabilty makes them suitable platforms to realize targeted electronic properties starting from the symmetries hidden in their unit cell. Here, we investigate the family of the recently discovered intermetallics MCo2Al9 (M=Sr, Ba) and we unveil their electronic structure....
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Fabrication, structural and electrical properties of Sr(V,Nb)O 3-δ perovskite materials
PublicationThe SrV1-xNbxO3-δ materials with different niobium content in perovskite B-sublattice were prepared by a solid-state reaction process. The microstructure and phase compositions of obtained samples were analyzed by the X-ray diffraction technique (XRD) and scanning electron microscopy (SEM). The electrical conductivity of samples was measured by a DC 4-wire method in range of 100–600 °C in different gas conditions. The oxidation...
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Proton-Electron Hole Interactions in Sr(Ti,Fe)O3−δ Mixed-Conducting Perovskites
PublicationOxides in which total electrical conductivity is determined by the partial conductivities of three types of charge carriers i.e. holes/ electrons, oxygen ions, and protons are key components of well-functioning proton ceramic fuel cells. Apart from electrochemical properties also easily modified microstructure is an important feature of the electrodes. In the paper, a group of SrTi1−xFexO3−δ (STF, x = 0.2–0.8) perovskites prepared...
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The effect of Sr and Mg substitutions on structure, mechanical properties and solubility of fluorapatite ceramics for biomedical applications
PublicationIonic substitutions play important role in the modifications of biological apatites. Recently, attention has been focused on the co-doping effects on the functional properties of apatite-based biomaterials. In this research work, the dense samples of fluorapatites, Ca10(PO4)6F2 and Ca8MgSr(PO4)6F2, were produced after sintering at 1250 °C for 6 h in air. Structural characterization carried out with XRD, IR, Raman and SEM, confirmed...
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Kurs dolara amerykańskiego na rynku polskim na tle centralnych stóp procentowych w Polsce i w USA w latach 1993-2001
PublicationW części teoretycznej artykułu omówiono problematykę efektywności wymiany walut. Zdefiniowano pojęcia oczekiwanych stóp zwrotu. W dalszej części przedyskutowano zagadnienia dotyczące analizy ex post efektywności wymiany walut oraz nawiązano do koncepcji parytetu.
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Aktorzy współpracy sieciowej trójmiejskiego regionu metropolitalnego. Diagnoza, scenariusze i perspektywy przyszłej współpracy (na tle wyników badań w Projekcie USUN CASE).
PublicationTrwanie miasta w dotychczasowej postaci, jakkolwiek nie byłoby uzasadnienie uchronnością współczesnych, globalnych procesów i zdarzeń wymaga rewizji poglądów zarówno w zakresie sposobów jego formowania i podtrzymywania jego struktur przestrzennych, jak i sposobów jego przemijania, a więc organizowania ekonomicznych, społecznych i kulturowych procesów wypełniających te struktury. Tytuł tekstu nawiązuje do postrzegania miasta...
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Przedsiębiorczość turystyczna w gminach nadmorskich województwa pomorskiego jako przejaw aktywności zawodowej w społecznościach ludzi morza w świetle tle badań socjologicznych
PublicationTematem artykułu jest zjawisko przedsiębiorczości turystycznej - prowadzenie usług turystycznych w wybranych gminach woj. pomorskiego. Opis rodzajów usług, standardu, form reklamy i marketingu przedsiębiorczości turystycznej. Artykuł na podstawie przeprowadzonych badań.
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Estimation of autotrophic maximum specific growth rate constant-experience from the long-term operation of a laboratory-scale Sequencing Batch Reactor System
PublicationW pracy wykorzystano wyniki badań z długookresowej eksploatacji laboratoryjnego reaktora typu SBR do estymacji stałej szybkości przyrostu bakterii nitryfikacyjnych. Badania obejmowały zarówno pomiary empiryczne (doświadczenia przy niskim stosunku substratu do biomasy) oraz symulacje komputerowe. Do symulacji dynamicznych wykorzystano jedną wartość współczynnika = 1,2 1/d, pomimo różnych wartości mierzonych jednostkowych szybkości...
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Residence time distribution in rapid multiphase reactors
PublicationResidence time distribution (RTD) provides information about average hydraulic residence time and the distribution of material in the reactor. A method for determining RTD for reactors with very short hydraulic residence times is deconvolution based on extraction of real RTD by the analysis of a non-ideal input signal. The mean residence time and dispersion were determined for the spinning fluids reactor (SFR). For the first time...
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Structure and thermoelectric properties of Bi–Te alloys obtained by novel method of oxide substrates reduction
PublicationA novel method of thermoelectric materials fabrication has been developed. Oxide reagents have been melted at high temperature in air, quenched, milled to powder and reduced in hydrogen to form Bi–Te alloys. Structural and thermoelectric properties of samples have been investigated depending on initial composition and temperature of reduction process. Sample 25Bi2O3–75TeO2 reduced at 340 °C for 10 h has been found to be a p-type...
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Kinetic analysis of the reduction of a ternary system of Bi, Sb and Te oxides by hydrogen for BiSbTe3 synthesis
PublicationReduction in a hydrogen atmosphere of Bi2O3, Sb2O3 and TeO2 mixes oxides for the synthesis of BiSbTe3 was analysed. The reduction reactions of Sb2O3 and Sb2O4 oxides, as well as Bi2O3+Sb2O3 and Sb2O3+3TeO2 mix- tures, were also evaluated. The reduction of Sb2O4 is investigated for the first time. The reactions of the mixed oxides systems also were not the subject of research so far despite being used for synthesis of the (Bi,Sb)2Te3...
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Potential of Polish R&D industry in the context of prototyping, design, development and control of a dedicated national satellite SAR system for marine ecosystem monitoring. Technical paper - preliminary study
Publicationpace technology is currently one of the most important elements in the advance of information societies and knowledge-based economies all over the world. The European Space Agency (ESA) is in the focal point of European space activities, while the European Union provides strong financial support for the development of space technologies and applications in its flagship programs. In a domestic scope, the Polish Space Agency (POLSA)...
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An integrated geoarchaeological approach to late Iron Age settlement at Kaštelina hillfort (Lopar, Island of Rab, Croatia) using Amplitude Data Comparison (ADC) method and trial excavation
PublicationGeophysical prospection and small-scale archaeological excavation were undertaken on the site of Kaštelina, a Late Iron Age hillfort settlement located on the Stolac promontory in the northern part of Rab island (Kvarner Gulf, Croatia). Within the frame of the “Archaeological topography of the island of Rab” program, a Polish–Croatian team applied a series of multidisciplinary methods to study the occupational history of the...
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Preliminary typology and contextual analysis of Roman and late antique cooking wares from the Roman rural settlement at Podšilo bay on the island of Rab (north–eastern Adriatic, Croatia)
PublicationThe paper presents a preliminary typology of coarse cooking ware from the Roman/late antique layers of the rural settlement at Podšilo bay on the island of Rab. The vessels have been associated with several basic shapes and divided by types, while fabrics have been described macroscopically. Analogies and a contextual analysis were used to propose dating and to assess provenience for well-known ware classes or to define areas...
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Chemical diffusion and surface exchange in selected Ln–Ba–Sr–Co–Fe perovskite-type oxides
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Green Light-Excitable Ce-Doped Nitridomagnesoaluminate Sr[Mg2Al2N4] Phosphor for White Light-Emitting Diodes
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Pressure evolution of luminescence in Sr Ba1−(NbO2)3:Pr3+ (x=1/2 and 1/3)
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Influence of magnetic field on electronic conduction of (Bi,Pb)–Sr–Ca–Cu–O granular superconductors
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Effect of preparation conditions on superconducting properties of (Bi,Pb)-Sr-Ca-Cu-O glass-ceramics
PublicationPraca przedstawia wpływ warunków krystalizacji na właściwości nadprzewodzące nadprzewodników wysokotemperaturowych (Bi,Pb)-Sr-Ca-Cu-O otrzymanyh metodą krystalizacji w fazie stałej. Nadprzewodniki otrzymano poprzez wygrzewanie amorficznego materiału o składzie (Bi0.8Pb0.2)4Sr3Ca3Cu4Ox w temperaturze pomiędzy 750°C i 865°C przez czas od 1 minuty do 43 godzin. Najlepsze właściwości, w w tym dużą gęstość prądu krytycznego otrzymano...
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Mixed ionic polaron transport and rapid crystallization in (Bi, Pb)-Sr-Ca-Cu-O glass.
PublicationPrzedstawiono rezultaty pomiarów zmiennoprądowego przewodnictwa elektrycznego w szkłach (Bi,Pb)-Sr-Ca-Cu-O. Zaobserwowano dwa mechanizmy przewodnictwa.Zaproponowano hopping małych polaronów i dyfuzję jonów Cu(I) jako mechanizmy przewodnictwa.
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High temperature XRD diffraction patterns collected during the reoxidation process of SFM-based compounds
Open Research DataThis dataset contains three file folders for SFM, LSFM (La-doped) and SFMNb (Nb-doped) respectively. Samples were reduced prior to the XRD measurements. The measurements were performed on Philipps X’Pert Pro diffractometer using a high-temperature Anthon Paar HT-1200 oven adapter. Scans were performed each 50 deg. in air. The data in dataset were already...
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Power of the SMR brainwaves in the mental imagery experiment in sport: the "Start in High Level Championship" scenario.
Open Research DataThe data were collected to perform research on the neural oscillation during mental imagery in sport. The main aim of the study was to examine the cortical correlates of imagery depending on instructional modality (guided vs self-produced) using various sport-related scripts. The research was based on the EEG signals recorded during the session with...