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Shear zone formation in 2D random granular specimens within enhanced hypoplasticity.
PublikacjaW artykule przedstawiono wyniki numerycznej stochastycznej analizy wpływu rozkładu początkowego wskaźnika porowatości w materiałach granulowanych na powstawanie lokalizacji odkształceń. Obliczenia wykonano dla ściskania dwuosiowego stosując metodę elementów skończonych na bazie mikropolarnego, nielokalnego i gradientowego prawa hipoplastycznego.
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Impact of movement tempo on bar velocity and time under tension in resistance exercises with different external loads
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Investigation of Iron and Zinc Concentrations in Human Milk in Correlation to Maternal Factors: An Observational Pilot Study in Poland
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A Decade of Wishes-Changes in Maternal Preference of the Mode of Delivery among Polish Women over the Last Decade
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Paternal Postpartum Bonding and Its Predictors in the Early Postpartum Period: Cross-Sectional Study in a Polish Cohort
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Internet jako idealne medium dla pomiaru poziomu zaufania społeczeństwa informacyjnego do nowych technologii
PublikacjaInternet, jak nic dotąd, zrewolucjonizowało urządzenie, jakim jestkomputer oraz komunikacje w świecie. Wynalazki telegrafu, telefonu, radia i komputera stworzyły zdolność bezprecedensowej integracji. Internet stał się niemal natychmiast ogólnoświatowym medium dla współpracy i współdziałania między społeczeństwami, gospodarkami i osobami korzystającymi z komputerów bez względu na położenie geograficzne.
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Internet jako nowa forma marketingu - w świetle badań socjologicznych przeprowadzonych w przedsiębiorstwie budowlanym.
PublikacjaArtykuł opisuje internet jako nowe narzędzie w działaniach marketingowych firm budowlanych (developerów). Sposoby jego wykorzystania w efektowniejszym i efektywniejszym pozyskiwaniu nowych klientów w oparciu o badania socjologiczne.
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Excitation of Circularly Polarized Wave via Single-Feed Metasurface-Integrated Compact Antenna for Internet of Things
PublikacjaA compact circularly polarized (CP) quasi-omnidirectional antenna is introduced for internet of things (IoT). The structure consists of two components implemented on FR-4 substrates, and sep-arated by an air gap: one printed with a rectangular patch fed through a matching network, and another with a metasurface and a ground plane. Two different methods for impedance matching are employed. An equivalent circuit model of the antenna...
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Electro-thermal buckling of elastically supported double-layered piezoelectric nanoplates affected by an external electric voltage
PublikacjaPurpose Thermal buckling of double-layered piezoelectric nanoplates has been analyzed by applying an external electric voltage on the nanoplates. The paper aims to discuss this issue. Design/methodology/approach Double-layered nanoplates are connected to each other by considering linear van der Waals forces. Nanoplates are placed on a polymer matrix. A comprehensive thermal stress function is used for investigating thermal buckling....
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Successive Iterative Method for Higher-Order Fractional Differential Equations Involving Stieltjes Integral Boundary Conditions
PublikacjaIn this paper, the existence of positive solutions to fractional differential equations with delayed arguments and Stieltjes integral boundary conditions is discussed. The convergence of successive iterative method of solving such problems is investigated. This allows us to improve some recent works. Some numerical examples illustrate the results.
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Kościoły międzywojennej Gdyni - kontekst urbanistyczny i architektoniczny =The churches of the Interwar Gdynia - the urban and architectural context
PublikacjaArtykuł prezentuje kościoły zbudowane w Gdyni w okresie międzywojennym: dwa w śródmieściu i po jednym w takich dzielnicach jak Witomino, Grabówek, Działki Leśne, Wzgórze Focha, Cisowa i Oksywie. Ukazano dzieje budowy tych obiektów ich architekturę i autorów oraz spoecyficzny kontekst urbanistyczny nowo powstającego miasta.
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Big Data from Sensor Network via Internet of Things to Edge Deep Learning for Smart City
PublikacjaData from a physical world is sampled by sensor networks, and then streams of Big Data are sent to cloud hosts to support decision making by deep learning software. In a smart city, some tasks may be assigned to smart devices of the Internet of Things for performing edge computing. Besides, a part of workload of calculations can be transferred to the cloud hosts. This paper proposes benchmarks for division tasks between an edge...
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Oxidative stress induced by 4-methyl-1-nitroacridine derivative C-1748 (Capridine B) in human colon cancer cells
PublikacjaZbadano wpływ pochodnej C-1748 (Capridine B) na indukcję stresu oksydacyjnego w komórkach ludzkich raków jelita grubego HCT-8 i HT29. W tym celu wykorzystano technikę cytometrii przepływowej z zastosowaniem barwników fluorescencyjnych H2DCFDA i DHR 123. W komórkach traktowanych pochodną C-1748 dochodziło do generowania reaktywnych form tlenu. Ponadto, pochodna C-1748 nie indukowała znaczącego spadku zawartości zredukowanej formy...
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Transformational leadership for researcher’s innovativeness in the context of tacit knowledge and change adaptability
PublikacjaThis study explores how a learning culture supported by transformational leadership influences tacit knowledge sharing and change adaptability in higher education and how these relations impact this sector’s internal and external innovativeness. The empirical model was tested on a sample of 368 Polish scientific staff using the structural equation modeling (SEM) method. Then results were expanded by applying OLS regression using...
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Концепция внутренней межъязыковой омонимии (на материале русского, польского и финского языков) [The conception of internal linguistic homonymy between languages as based on the material from Russian, Polish and Finnish]
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Influence of SDHI Seed Treatment on the Physiological Conditions of Spring Barley Seedlings under Drought Stress
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Melatonin Supplementation Lowers Oxidative Stress and Regulates Adipokines in Obese Patients on a Calorie-Restricted Diet
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Fungi-derived agriculturally important nanoparticles and their application in crop stress management – Prospects and environmental risks
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Comparison between methods for determining the effective vertical yield stress of intermediate fine-grained soils
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Influence of analysis of features geometrical abrasive grains stress, strain and displacement of material in zone microgrinding
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Analysis of stress and strains, forces and energy in initial contact zone abrasive grain with treating material
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Antioxidative enzymes and expression of rbcL gene as tools to monitor heavy metal-related stress in plants
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Cadmium-Induced Oxidative Stress in Plants, Cadmium Toxicity, and Tolerance in Plants: From Physiology to Remediation
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Stress-related expression of the chloroplast EGY3 pseudoprotease and its possible impact on chloroplasts’ proteome composition
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The level of jasmonic acid in Arabidopsis thaliana and Phaseolus coccineus plants under heavy metal stress
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Buserelin Acetate Reduces Mortality and DNA Defragmentation of Bovine Sperm Cells Exposed to Oxidative Stress
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Transcriptomic profiling of the salt stress response in excised leaves of the halophyte Beta vulgaris ssp. maritima
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Comparison between methods for determining the effective vertical yield stress of intermediate fine-grained soils
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Two approaches to model the behaviour of soft natural clays under principal stress axes rotation.
PublikacjaPrzedstawiono porównanie dwóch podstawowych metod modelowania konstytutywnego pozwalających na symulację odkształcenia przy obrocie składowych głównych naprężenia. Dotyczy to zastosowania wzmocnienia kinematycznego oraz modelu wielopłaszczyznowego (multi-laminate). Wyniki symulacji porównano z wynikami badań laboratoryjnym w cylindrycznym aparacie skrętnym na próbkach w kształcie wydrążonego walca.
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Normal stress distribution in built‑up cold‑formed column in relation to interconnecting bolt spacing
PublikacjaIn order to increase a stiffness of cold-formed steel (CFS) elements it is practised to built-up the cross-section. In the analysed case, a main element is strengthened by adding extra chord in contact partially along the column. This additional chord acts as a longitudinal stiffener connected with the main section by series of bolts. Authors check whether rules applied over the years, for hot-rolled elements, can be indiscriminately...
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Buckling Analysis of a Micro Composite Plate with Nano Coating Based on the Modified Couple Stress Theory
PublikacjaThe present study investigates the buckling of a thick sandwich plate under the biaxial non-uniform compression using the modified couple stress theory with various boundary conditions. For this purpose, the top and bottom faces are orthotropic graphene sheets and for the central core the isotropic soft materials are investigated. The simplified first order shear deformation theory (S-FSDT) is employed and the governing differential...
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Stress Detection of Children with Autism using Physiological Signals in Kaspar Robot-Based Intervention Studies
PublikacjaThis study aims to develop a stress detection system using the blood volume pulse (BVP) signals of children with Autism Spectrum Disorder (ASD) during robot-based interven- tion. This study presents the heart rate variability (HRV) analysis method to detect the stress, where HRV features are extracted from raw BVP signals recorded from an E4 wristband during interaction studies with the social robot Kaspar. Low frequency power...
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Impact of Tensile and Compressive Stress on Classical and Acoustic Barkhausen Effects in Grain-Oriented Electrical Steel
PublikacjaIn this paper, we present the results of the investigation of impact of tensile and compressive stress on the classical Barkhausen effect, magnetoacoustic emission (MAE) signal properties, and B(H) hysteresis loops for grain-oriented (GO) electrical steel. Samples have been glued to a nonmagnetic steel bar and stressed within elastic range (±800 μdef) by means of four-point bending method. The samples were cut out in two directions...
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Late cultivars of cabbage can better cope with cadmium- involved stress than early one
PublikacjaThe usefulness of white cabbage (Brassica oleracea ssp. capitata L. f. alba) for phytoremediation of heavy metals (cadmium and zine) due to the rapid growth and a large biomass of its heads has been already described (Bączek-Kwinta et al., 2011. Kusznierewicz et al., 2012). As the photosynthetic apparatus supplies the whole plant with sugars necessary for various physiological processes and, in consequence, results in the yield,...
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NON-LINEAR MASTIC CHARACTERISTICS BASED ON THE MODIFIED MSCR (MULTIPLE STRESS CREEP RECOVERY) TEST
PublikacjaMastic containing asphalt in its composition is an example of a viscoelastic material. It is an effective binder in asphalt. It consists of a filler (<0.063 mm) and asphalt mixed in the right proportions. Just like in asphalt, its response depends on the temperature level, the load and stress time. Changing the stress stiffness of the mastic affects the non-linear course of the stress-strain relationship. Modelling of the non-linear...
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Sulfate‐reducing bacteria‐assisted hydrogen‐induced stress cracking of 2205 duplex stainless steels
PublikacjaThe paper presents the results of a laboratory investigation of the microbiologically assisted hydrogen‐induced stress cracking (HISC) of 2,205 duplex stainless steel (DSS). The testing of susceptibility toward HISC was performed with two different methods. Precharged in sulfate‐reducing bacteria (SRB), inoculated medium samples were subjected to slow strain‐rate testing in artificial seawater. In situ constant load tests were...
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The Dominant Influence of Plastic Deformation Induced Residual Stress on the Barkhausen Effect Signal in Martensitic Steels
PublikacjaThe paper presents the results of investigation of the influence of plastic deformation on the magnetic properties of martensitic steel (P91 grade). The properties of the hysteresis loops as well as of the Barkhausen effect (BE) signal are analysed for both tensile and compressive loading up to ε = 10% of plastic deformation. The choice of the steel and of the deformation range is unique, since for such combination one can expect...
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Stress–strain model of lower corroded steel plates of normal strength for fitness-for-purpose analyses
PublikacjaThis study investigates the mechanical properties of specimens made of normal strength steel subjected to lower marine immersed corrosion degradation levels (below 25 %). The specimens were corroded in laboratory conditions, and only natural factors were controlled to raise the corrosion rate (reaching the level of 1 mm/year). Three different thicknesses of plates made of normal strength of shipbuilding steel are investigated (between...
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Total impact of oxidative stress genes on cardiovascular events—a 7-year follow-up study
PublikacjaCardiovascular (CV) events are the number one cause of lifetime disability and deaths worldwide. It is well known that traditional risk factors do not fully correlate with clinical outcomes; therefore, searching for other markers that would explain CV events occurrence seems essential. Of importance, one of the main factors at the origin of CV events is oxidative stress, causing inflammation and atherosclerotic plaque instability....
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Fatigue life improvement using low transformation temperature weld material with measurement of residual stress
PublikacjaWelding processes often produce high levels of tensile residual stress. Low transformation temperature (LTT) welding wires utilise phase transformation strains to overcome the thermal contraction of a cooling weld. In this paper, the residual stress within each weld was quantified using the milling/strain gauge method, being the strain change measured as the weldment was milled away. The fatigue tests were conducted under uniaxial...
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Tubular House - Form Follows Technology, Concrete Shell Structure with Inner Thermal Insulation
PublikacjaThe aim of this paper is the theoretical analysis of the possibilities and limitations of using an unconventional technology and the original architectural form stemming from it – the building with external construction and internal insulation. In Central European climatic conditions, the traditional solution for the walls of heated buildings relies on using external thermal insulation. This stems from building physics: it prevents...
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<title>Broadband optical-Internet-based modular interactive information system for research department in university environment</title>
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Broadband, optical Internet-based, modular, interactive information system for research deptartment in university environment: part II
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Preparation of Komagataeibacter xylinus Inoculum for Bacterial Cellulose Biosynthesis Using Magnetically Assisted External-Loop Airlift Bioreactor
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Development of the first internally-quenched fluorescent substrates of human cathepsin C: The application in the enzyme detection in biological samples
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Impact of active intra-complex rest intervals on post-back squat versus hip thrust jumping potentiation
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The Acute Effects of External Compression With Blood Flow Restriction on Maximal Strength and Strength-Endurance Performance of the Upper Limbs
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The influence of a strong external magnetic field from a permanent magnet on a measurement accuracy of an inductive watt-hour meter
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Carotenoid Content in Breastmilk in the 3rd and 6th Month of Lactation and Its Associations with Maternal Dietary Intake and Anthropometric Characteristics
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System typu SCADA oparty na komunikacji w sieci Intranet/Internet dla sterowanych układów napędowych
PublikacjaPrzedstawiono system typu SCADA opracowany do sterowania układami napędowymi z wykorzystaniem procesorów sygnałowych DSP. Nadrzędne sterowanie oparte jest na aplikacjach prowadzących komunikację w modelu klient-serwer w sieci Intranet/Internet. Aplikacje Client i Server wykorzystuję kontrolę transmisji protokołu TCP/IP oraz algorytm z pzresuwnym oknem do estymacji jakości połączenia w sieci. Obiektem sterowania jest układ napędowy...