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Search results for: flip bifurcation
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The Effects of Plyometric Conditioning Exercises on Volleyball Performance with Self-Selected Rest Intervals
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Enhancement of Countermovement Jump Performance Using a Heavy Load with Velocity-Loss Repetition Control in Female Volleyball Players
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Application of PCR-HRM method for microsatellite polymorphism genotyping in the LDHA gene of pigeons (Columba livia)
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FEA analysis of the multicell piezoelectric motor
PublicationThe presented paper concerns a design, modeling and chosen tests of the prototype multicell piezoelectric motor (MPM). The principle of operation based on three independent traveling wave actuators is presented. The main materials and technologies used in the fabrication process are described. The structure of the motor is modeled using static and modal FEM analysis. The process of traveling wave generation in the MPM structure...
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System zdalnego monitoringu parametrów pracy siłowni wiatrowej o pionowej osi obrotu
PublicationW artykule przedstawiono układ do zdalnego monitorowania parametrów pracy elektrowni wiatrowej o pionowej osi obrotu. Do budowy systemu wykorzystano mikrokomputer klasy Raspberry PI 3 z zainstalowanym systemem operacyjnym Raspbian oraz kartę pomiarową MicroDAQ E2000. Opracowanysystem umożliwia monitorowanie mocy na wyjściu generatora, momentu na wale turbiny, prędkości obrotowej turbiny oraz prędkości wiatru. Wartości monitorowanych...
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Winding function approach based design of novel five-phase brushless doubly fed induction generator
PublicationThe paper presents the concept of the new design of the five-phase brushless doubly fed induction generator. The generator is dedicated to the modern wind turbine. The innovative design approach uses a five-phase power supply from the stator control winding side of the generator with a stator three-phase classic power winding. The research results presented indicate that the electromagnetic coupling between the control and power...
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Possible quadrupole-order-driven commensurate-incommensurate phase transition in B20 CoGe
PublicationThe B20-type cobalt germanide CoGe was investigated by measuring the specific heat, resistivity, and 59Co nuclear magnetic resonance (NMR).We observed a phase transition at TQ = 13.7 K, evidenced by a very narrow peak of the specific heat and sharp changes of the nuclear spin-spin (T −1 2 ) and spin-lattice (T −1 1 ) relaxation rates. The fact that the entropy release is extremely small and the Knight shift is almost independent...
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Investigation of noises in the EPN weekly time series
PublicationThe constantly growing needs of permanent stati ons’ velocities users cause their stability level to increase. To this research we included more than 150 stations located across Europe operating within the EUREF Permanent Network (EPN) w ith weekly changes in the ITRF2005 reference frame. The obvious long-range dependencies in the stochastic part of GPS time series were p roven by Ljung-Box...
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Does Post-Activation Performance Enhancement Occur during the Bench Press Exercise under Blood Flow Restriction?
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Analysis of power output and bar velocity during various techniques of the bench press among women
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Can Post-Activation Performance Enhancement (PAPE) Improve Resistance Training Volume during the Bench Press Exercise?
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Short-Term Blood Flow Restriction Increases Power Output and Bar Velocity During the Bench Press
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Acute Caffeine Intake Enhances Mean Power Output and Bar Velocity during the Bench Press Throw in Athletes Habituated to Caffeine
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First-order magnetic transition in single-crystalline CaFe2As2 detected by 75As nuclear magnetic resonance
PublicationPrzedstawione są wyniki badań jądrowego rezonansu magnetycznego na 75As dla kryształów CaFe2As2. Wyniki wskazują, że strukturalne i magnetyczne przejścia w CaFe2As2 są silnie skorelowane i są pierwszego rodzaju.
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Microscopic 75^As NMR study of the effect of impurities on the first-order spin-density-wave transition in BaFe2As2
PublicationOpisane są wyniki badań NMR na 75^As w monokryształach i próbkach polikrystalicznych BaFe2As2. Zanieczyszczenia cyną wpływają na niskoenergetyczne fluktuacje spinowe i obniżają temperaturę krytyczną ze 138K do 85K.
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Increased inspiratory resistance affects the dynamic relationship between blood pressure changes and subarachnoid space width oscillations
PublicationBackground and objective Respiration is known to affect cerebrospinal fluid (CSF) movement. We hypothesised that increased inspiratory resistance would affect the dynamic relationship between blood pressure (BP) changes and subarachnoid space width (SAS) oscillations. Methods Experiments were performed in a group of 20 healthy volunteers undergoing controlled intermittent Mueller Manoeuvres (the key characteristic of the procedure...
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Elemental and organic carbon in aerosols over urbanized coastal region (southern Baltic Sea, Gdynia)
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Pressure-induced superconductivity in CaFe2As2
PublicationNowo odkryty związek CaFe2As2 pod wpływem zewnętrznego ciśnienia 0.69 GPa przechodzi w stan nadprzewodnictwa z temperaturą krytyczną powyżej 10K.
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Range of motion of resistance exercise affects the number of performed repetitions but not a time under tension
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Probability estimation of the city’s energy efficiency improvement as a result of using the phase change materials in heating networks
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A new endophyte Monascus ruber SRZ112 as an efficient production platform of natural pigments using agro-industrial wastes
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Mechanical-Level Hardware-In-The-Loop and Simulation in Validation Testing of Prototype Tower Crane Drives
PublicationIn this paper, the static and dynamic simulations, and mechanical-level Hardware-In-the-Loop (MHIL) laboratory testing methodology of prototype drive systems with energy-saving permanent-magnet electric motors, intended for use in modern construction cranes is proposed and described. This research was aimed at designing and constructing a new type of tower crane by Krupiński Cranes Company. The described research stage was necessary...
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Influence of silver-core gold-shell nanoparticle parameters on the variation of surface-enhanced Raman spectra
PublicationThe detection of molecules by surface-enhanced Raman spectroscopy (SERS) is dependent on the nanomaterial used to induce the enhancement effect. This depends on a variety of parameters of the substrate such as the metal used for their creation, their shape, size and size distribution, concentration, as well as the parameters of the solution, such as packing of the nanoparticles, the complexity of the sample, the solvent, etc. It...
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Wytwarzanie i wybrane właściwości kompozycji kauczukowych z regenerowaną celulozą.
PublicationCelem niniejszej pracy było zbadanie wpływu regenerowanych włókien wiskozowych (dodanych w ilości 10, 20, 30 phr) jako proekologicznego napełniacza na wybrane właściwości kompozycji na osnowie kauczuku na-turalnego. Dla każdej z wyżej wymienionych proporcji otrzymano materiały wulkanizowane przez 5, 10, 15, 20 minut. Uzyskane materiały poddano statycznej próbie rozciągania, badaniu elastyczności przy odbiciu metodą...
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Physical properties and electronic structure of La3Co and La3Ni intermetallic superconductors
PublicationLa3Co and La3Ni are reported superconductors with transition temperatures of 4.5 and 6 K, respectively. Here, we reinvestigate the physical properties of these two intermetallic compounds with magnetic susceptibility χ, specific heat Cp and electrical resistivity ρ measurements down to 1.9 K. Although bulk superconductivity is confirmed in La3Co, as observed previously, only a trace of it is found in La3Ni, indicating that the...
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The Effects of the Movement Tempo on the One-Repetition Maximum Bench Press Results
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The Impact of Adjacent Road on Vascular Plant Species Composition in Herbaceous Layers of Peucedano-Pinetum and Tilio-Carpinetum Urban Forests in the City of Warsaw (Poland)
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The impact of environmental water on the potential application of core−shell titania−silica nanospheres as photocatalysts
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Hybridization-driven gap in U3Bi4Ni3: A 209Bi NMR/NQR study
PublicationZostały przeprowadzone badania jądrowego rezonansu magnetycznego (na jądrach 209Bi) na kryształach U3Bi4Ni3. U3Ni4Bi3 jest tzw. izolatorem typu Kondo.
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Badania komunikacji pomiędzy urządzeniami automatyki zabezpieczeniowej zgodnie ze standardem IEC 61850
PublicationW artykule opisano badania modelu sieci SN wyposażonego w przekaźniki REF615 Serii Relion firmy ABB oraz tester zabezpieczeń CMC 256-6 firmy OMICRON. Na stanowisku badawczym na Wydziale Elektrotechniki i Automatyki Politechniki Gdańskiej przeprowadzono badania czasu przesyłania komunikatów GOOSE oraz retransmisji danych za pomocą testera zabezpieczeń CMC 256-6. Wyniki potwierdziły niezawodność oraz powtarzalność czasów przesyłu...
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Sea spray as a secondary source of chlorinated persistent organic pollutants? - Conclusions from a comparison of seven fresh snowfall events in 2019 and 2021
PublicationSecondary sources of persistent organic pollutants (POPs) gain in importance worldwide as primary sources decline. In this work, we aim to determine whether sea spray may be a secondary source of chlorinated POPs to the terrestrial Arctic, since a similar mechanism was proposed there only for the more water-soluble POPs. To this end, we have determined polychlorinated biphenyls and organochlorine pesticides concentrations in fresh...
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Nanoparticle-assisted biohydrogen production from pretreated food industry wastewater sludge: Microbial community shifts in batch and continuous processes
PublicationBiohydrogen production from industrial waste has gained a significant attention as a sustainable energy source. In this study, the enrichment of biohydrogen production from pretreated dissolved air flotation (DAF) sludge, generated from food industry wastewater treatment plants, was investigated using SiO2@Cu-Ag dendrites cor- e–shell nanostructure (NS). The effect of NS on the changes of the microbial community and biohydrogen...
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The first order phase transition and superconductivity in BaNi2As2 single crystals
PublicationDyskutowane są synteza i właściwości fizyczne monokryształów BaNi2As2. BaNi2As2 krystalizuje w strukturze ThCr2Si2, a stałe sieciowe wynoszą odpowiednio: a = 4.112(4) A i c = 11.54(2) A. Pomiar oporu elektrycznego, zmiennopolowej podatności magnetycznej, ciepła właściwego, pokazują objętościowy efekt nadprzewodzący z Tc = 0.7 K.
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The Effects of Ischemia During Rest Intervals on Bar Velocity in the Bench Press Exercise With Different External Loads
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Effects of Acute Caffeine Intake on Power Output and Movement Velocity During a Multiple-Set Bench Press Exercise Among Mild Caffeine Users
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Promising effects of xanthine oxidase inhibition by allopurinol on autonomic heart regulation estimated by heart rate variability (HRV) analysis in rats exposed to hypoxia and hyperoxia
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Preliminary Research towards Acute Effects of Different Doses of Caffeine on Strength–Power Performance in Highly Trained Judo Athletes
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Acute Effects of Isometric Conditioning Activity on the Viscoelastic Properties of Muscles and Sprint and Jumping Performance in Handball Players
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AOP173 key event associated pathway predictor – online application for the prediction of benchmark dose lower bound (BMDLs) of a transcriptomic pathway involved in MWCNTs-induced lung fibrosis
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Rainwater chemistry composition in Bellsund: Sources of elements and deposition discrepancies in the coastal area (SW Spitsbergen, Svalbard)
PublicationDiscrepancies in rainfall chemistry in Bellsund were found to be influenced by the orographic barrier and related to the variability in the inflow of air masses as well as to the distance of sampling sites from the sea and thus the extent of sea spray impact. This study covers measurements of rainfall (P) and air temperature (T), physicochemical parameters (pH, specific electrolytic conductivity (SEC), major ions (Cl , NO3 , SO4...
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Impact of abiotic stressors on nutrient removal and rhizomicrobiome composition in floating treatment wetland with Equisetum hyemale
PublicationFloating treatment wetlands (FTW) are receiving growing interest as a phyto-technology. However, there are significant research gaps regarding the actual role of plant species and plant-microbiome interactions. In this study, the nutrient uptake of Equisetum hyemale was examined in FTW microcosms under the influence of abiotic stressors: As (3 mg/L) and Pb (3 mg/L) as well as Cl− (300 and 800 mg/L) in reference to a control during...
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Effect of grip width on exercise volume in bench press with a controlled movement tempo in women
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Placebo Effect of Caffeine on Maximal Strength and Strength Endurance in Healthy Recreationally Trained Women Habituated to Caffeine
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ThDione: A Powerful Electron‐Withdrawing Moiety for Push–Pull Molecules
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Silver nanoparticles incorporated with superior silica nanoparticles-based rice straw to maximize biogas production from anaerobic digestion of landfill leachate
PublicationTreating hazardous landfill leachate poses significant environmental challenges due to its complex nature. In this study, we propose a novel approach for enhancing the anaerobic digestion of landfill leachate using silver nanoparticles (Ag NPs) conjugated with eco-friendly green silica nanoparticles (Si NPs). The synthesized Si NPs and Ag@Si NPs were characterized using various analytical techniques, including transmission electron...
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The impact of potential leakage from the sub-seabed CO2 storage site on the phosphorus transformation in marine sediments – An experimental study
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Ni2X2 (X = pnictide, chalcogenide, or B) based superconductors
PublicationPublikacja jest przeglądem właściwości nadprzewodników na bazie niklu, które zawierają płaszczyzny Ni2X2 (X=As, P, Bi, Si, Ge, B).
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The effects of different doses of caffeine on maximal strength and strength‐endurance in women habituated to caffeine
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Impact of Movement Tempo Distribution on Bar Velocity During a Multi-Set Bench Press Exercise
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Acute Effects of Ischemic Intra-Conditioning on 30 m Sprint Performance
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