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Controlling the europium oxidation state in diopside through flux concentration
PublikacjaThis paper explores the connection between the H3BO3 flux concentration and the co-existence of Eu2+ and Eu3+ dopants within CaMgSi2O6 crystals (diopside). The samples were synthesised using a solid-state synthesis method under varying atmospheric conditions, including oxidative (air), neutral (N2), and reductive (H2/N2 mixture) environments. Additionally, some materials underwent chemical modification by partially substituting...
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OCENA WŁAŚCIWOŚCI STALI STOSOWANEJ W STARYCH OBIEKTACH KOLEJOWYCH
PublikacjaThe scope of the paper is to give an introduction to the assessment subject matter of steel properties used in old railway bridges. The mechanical and chemical properties of construction steel extracted from old steel bridges are generally investigated by tensile tests, impact tests through the Charpy pendulum impact V-notch, and an optical emission spectrometer. Besides descriptions of the tests, the chosen chemical and mechanical...
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Nonlinear phenomena of small-scale sound in a gas with exponential stratification
PublikacjaThe nonlinear dynamics of perturbations, quickly varying in space, with comparatively large characteristic wavenumbers k: k>1/H, is considered. H is the scale of density and pressure reduction in unperturbed gas, as the coordinate (H is the so-called height of the uniform equilibrium gas). Coupling nonlinear equations which govern the sound and the entropy mode in a weakly nonlinear flow are derived. They describe the dynamics...
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A pore-scale thermo–hydro-mechanical model for particulate systems
PublikacjaA pore scale numerical method dedicated to the simulation of heat transfer and associated thermo–hydro-mechanical couplings in granular media is described. The proposed thermo–hydro-mechanical approach builds on an existing hydromechanical model that employs the discrete element method for simulating the mechanical behavior of dense sphere packings and combines it with the finite volume method for simulating pore space fluid flow...
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Investigation of rotational state-changing collisions of C2N− ions with helium
PublikacjaThe cross sections for rotational inelastic collisions between atoms and a molecular anion can be very large, if the anion has a dipole moment. This makes molecular anions very efficient in cooling atomic gases. We address rotational inelastic collisions of Helium atoms with the molecular anion C2N–. Here we present preliminary calculations of the potential energy surface.
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Disaster Resilience of Optical Networks: State of the Art, Challenges, and Opportunities
PublikacjaFor several decades, optical networks, due to their high capacity and long-distance transmission range, have been used as the major communication technology to serve network traffic, especially in the core and metro segments of communication networks. Unfortunately, our society has often experienced how the correct functioning of these critical infrastructures can be substantially hindered by massive failures triggered by natural...
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On the Peano Theorem for Some Functional Differential Equations on Time Scale
PublikacjaThe Peano Theorem for some functional differential equations on time scale is proved. Assumptions are of Caratheodory type. Two counter examples for false Peano theorems in the literature are presented.
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Synthesis of a state feedback controller for an averaging tank with variable filling
PublikacjaIn paper, a nonlinear averaging tank with variable filling is considered. The main purpose of this research work was the modelling and control system synthesis of an averaging tank. The control objectives included ensuring stability and zero steady-state error of the system and achieving settling time as short as possible, while maintaining a minimal overshoot. In order to achieve the intended purpose, firstly a mathematical model...
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Przed modernizmem - style w gdyńskiej architekturze lat dwudziestych
PublikacjaZarówno w historiografii architektury polskiej jak i europejskiej lata dwudzieste XX wieku omawiane są głównie w kontekście rodzącego się modernizmu. Nic w tym zresztą nie ma dziwnego, bo to właśnie ten nurt wyznaczał nowe trendy i w przyszłości decydować miał o dziejach architektury w całym stuleciu. Odchodziła w przeszłość trwająca od połowy XIX wieku epoka historyzmu, a zaczynała się epoka nowa, modernistyczna. Tak więc oblicze...
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Systemic analysis of a manufacturing process based on a small scale bakery
PublikacjaThe main aim of the article is to present two new innovative concepts of reliability of a functioning manufacturing system in the process of making bread in small-scale bakeries. Reliability is understood as one of the representations of an operator acting on specifc streams in time to - t. One of these represents the global reliability of a system as a function of parallel action of all the streams of the system in time to to...
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Seismic Pounding Between Bridge Segments: A State-of-the-Art Review
PublikacjaEarthquake-induced structural pounding in bridge structures has been observed in several previous seismic events. Collisions occur at the expansion joints provided between adjacent decks or between the deck and abutment. Pounding between the structural elements may lead to severe damages and even to the unseating of the bridge in certain cases. Several investigations have been performed to study pounding in bridges under uniform...
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The state of the art in the field of decrease the pollution in the South Baltic area
PublikacjaVarious form of human activity such as maritime transports, industrial activities, busy traffic, intensive farming and animal husbandry can have negative impact on natural marine environment. Baltic Sea catchment area is characterized by the high river water flux and wastewater treatment plants discharges. Additionally, the limited shallow connection to the North Sea results in little water exchange and residence time of approximately...
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Ammonia Gas Sensors: Comparison of Solid-State and Optical Methods
PublikacjaHigh precision and fast measurement of gas concentrations is important for both understanding and monitoring various phenomena, from industrial and environmental to medical and scientific applications. This article deals with the recent progress in ammonia detection using in-situ solid-state and optical methods. Due to the continuous progress in material engineering and optoelectronic technologies, these methods are among the most...
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OBTAINING FLUID FLOW PATTERN FOR TURBINE STAGE WITH NEURAL MODEL.
PublikacjaIn the paper possibility of applying neural model to obtaining patterns of proper operation for fluid flow in turbine stage for fluid-flow diagnostics is discussed. Main differences between Computational Fluid Dynamics (CFD) solvers and neural model is given, also limitations and advantages of both are considered. Time of calculations of both methods was given, also possibilities of shortening that time with preserving the accuracy...
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New Architecture of Solid-State High-Voltage Pulse Generators
PublikacjaThe application of the nanosecond pulsed electric field (nsPEF) for biomedical treatments has gained more interest in recent decades due to the development of pulsed power technologies which provides the ability to control the electric field dose applied during tests. In this context, the proposed paper describes a new architecture of solid-state high-voltage pulse generators (SSHVPG) designed to generate fully customised sequences...
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Zero-range potentials for Dirac particles: Bound-state problems
PublikacjaA model in which a massive Dirac particle in $\mathbb{R}^{3}$ is bound by $N\geqslant1$ spatially distributed zero-range potentials is presented. Interactions between the particle and the potentials are modeled by subjecting a particle's bispinor wave function to certain limiting conditions at the potential centers. Each of these conditions is parametrized by a $2\times2$ Hermitian matrix (or, equivalently, a real scalar and a...
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Two-Stage Variable-Fidelity Modeling of Antennas with Domain Confinement
PublikacjaSurrogate modeling has become the method of choice in solving an increasing number of antenna design tasks, especially those involving expensive full-wave electromagnetic (EM) simulations. Notwithstanding, the curse of dimensionality considerably affects conventional metamodeling methods, and their capability to efficiently handle nonlinear antenna characteristics over broad ranges of the system parameters is limited. Performance-driven...
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N-doped carbon materials as electrodes for highly stable supercapacitors
PublikacjaThis article reports a strategy to use nitrogen-doped carbon materials as electrodes for supercapacitors. Depending on the carbon precursor, the porous structure is changed with specific surface area reached up to 2270 m2 g−1. The capacitance of carbon materials used as electrodes is related strictly to pore size. The microstructure and nitrogen functionalities enable a high capacitance (327 F g−1) and cycle durability. The nanoporous...
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THE ROLE OF THE STATE IN TAXATION. POLISH TAX POLICY AFTER 2015
PublikacjaThis article is an attempt to present and evaluate tax policy Polish of the years 2015-2020, i.e. the period which resulted in formulating the new government. These time was a period of tax reforms, the introduction of new taxes and public tributes, as well as new mechanisms to control tax collection. Moreover, the policies introduced also concern changes in the level of fiscalism and tax redistribution. The research methods adopted...
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Ochrona katodowa stali zbrojeniowej w długoletnim okresie eksploatacji
PublikacjaZapobieganie powstawaniu ognisk korozji w zbrojeniu konstrukcji żelbetowych jest jednym z głównych czynników, które pozwalają na długą i niezawodną ich eksploatację. W artykule przedstawiono mechanizm działania protektorów cynkowych na podstawie przeprowadzonych badań in situ. Przedstawione badania wskazują, że ochrona katodowa z wykorzystaniem polskich protektorów cynkowych TOP ZINC wykazuje bardzo sprawne działanie.
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SUICIDES FOR ECONOMIC REASONS AS A MEASURE OF THE STATE OF THE ECONOMY: THE CASE OF POLAND
PublikacjaSuicides are a phenomenon observed in many countries. The causes of a decision so drastic as far as consequences are concerned include i.a. economic reasons. The question arises whether the changing number of suicides reflects the state of the economy. The direct link between the state of the economy and suicides has not been sufficiently studied so far. The authors of this article attempted to identify the links between selected...
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Structured deformation of granular material in the state of active earth pressure
PublikacjaThe paper focuses on the ability of granular materials to undergo structured deformation by analysing the data from the retaining wall model tests and discrete element simulations. The structured deformation means the movement of a granular material which produces a stable, regular pattern of multiple shear bands. The paper's primary purpose is to study this kind of deformation for the selected data representing the state of active...
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Security of Cryptocurrencies: A View on the State-of-the-Art Research and Current Developments
Publikacja[Context] The goal of security is to protect digital assets, devices, and services from being disrupted, exploited or stolen by unauthorized users. It is also about having reliable information available at the right time. [Motivation] Since the inception in 2009 of the first cryptocurrency, few studies have been undertaken to analyze and review the state-of-the-art research and current developments with respect to the security...
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Numerical investigations on early indicators of fracture in concrete at meso-scale.
PublikacjaFracture is a major reason of the global failure of concretes. The understanding of fracture is important to ensure the safety of structures and to optimize the material behaviour. In particular an early prediction possibility of fracture in concretes is of major importance. In this paper, concrete fracture under bending was numerically analysed using the Discrete Element Method (DEM). The real mesoscopic structure of a concrete...
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Confined granular flow in silos with inserts - full-scale experiments
PublikacjaArtykuł omawia wyniki doświadczalne przepływów silosowych w silosach w naturalnej skali ze wstawkami. Podczas doświadczeń pomierzono przemieszczenia oraz napór na ściany. Zastosowano różne typy wstawek położone na różnej wysokości. Wyniki badań doświadczalnych porównano z przepływami bez wstawek.
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Scale effects in granular bodies during plane strain compression.
PublikacjaW arykule omówiono efekty skali w materiałach granulowanych spowodowanych wielkością próbek. Obliczenia wykonano stosując MES na bazie prawa hipoplastycznego rozszerzonego o długość charakterystyczną. Porównano różne metody regularyzacji.
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state aid for broadband infrastructure
Dane BadawczeThe dataset encompasses a choice of important legal acts, a list of selected bibliography, and a list of important individual sentences issued on the topic of state aid for building the infrastructure and rendering of broadband services during the period 2007-2013 and 2014-2020, as well as beyond, in the EU Member States. Thanks to that the reader gets...
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state aid for export activities
Dane BadawczeThe dataset encompassed a choice of the most important legal acts, a list of selected Polish and foreign bibliography, together with a list of important individual EC decisions issued on the topic of state aid for export credits in Poland and some UE countries in the period 2001-2019. Thanks to that the reader gets the possibility do acquire basic...
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Społeczno-zawodowy wymiar tożsamości człowieka w kontekście przemian społecznych, politycznych i kulturowych (wstęp do analizy terminologicznej - punkt wyjścia do rozważań)
PublikacjaTreścią rozdziału w monografii jest analiza terminologiczna w ramach przeglądu literatury przedmiotu odnoszącej się do kategorii tożsamości społeczno-zawodowej w kontekście przemian społecznych, politycznych i kulturowych.
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The Journal of the Louisiana State Medical Society : official organ of the Louisiana State Medical Society
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A new approach to numerical solution of fixed-point problems and its application to delay differential equations
PublikacjaW pracy rozpatruje się pewne aproksymacje punktu stałego ciągłego operatora A odwzorowującego przestrzeń metryczną w siebie. Wspomniany punkt stały przybliża się tzw. epsilon przybliżonym punktem stałym z przestrzeni skończenie wymiarowej. Udowodnione zostało twierdzenie dające warunki konieczne i dostateczne istnienia punktu stałego w ogólnej przestrzeni metrycznej. Warunki te wyrażone są w terminach epsilon przybliżonego punktu...
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PROGRESS IN SOLID STATE CHEMISTRY
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European Journal for Church and State Research
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Bulletin of Russian State Medical University
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Novosibirsk State Pedagogical University Bulletin
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Journal - Oklahoma State Medical Association
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Journal of the Mississippi State Medical Association
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Adolescent Medicine: State of the Art Reviews
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New York State Dental Journal
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Public administration and state security aspects
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European State Aid Law Quarterly
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IEEE Solid-State Circuits Letters
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SOLID STATE NUCLEAR MAGNETIC RESONANCE
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An Extended Control of the Input Angle for Matrix Converters Connected with the Non-Unity Power Factor Loads.
PublikacjaThis paper proposes a novel PWM modulation algorithm for Multiphase Conventional Matrix Converters (MCMC), with 3 inputs and k outputs, using the transfer function of the load angle. The proposed approach extends the range of power angle control at the input during the operation with a maximum voltage transfer ratio. The proposed concept is based on the Direct Analytic Voltage PWM (DAV--PWM) modulation with an elliptical trajectory...
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Review of titanium and steel welding methods
PublikacjaThe paper presents review of methods of titanium and steel welding. On basis of professional literature it was stated that titanium can be joined with steel by means of explosive welding or brazing.Joining titanium with steel by TIG welding and friction welding methods is possible with the use of copper and tantalum or vanadium interlayer.
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Compact scheduling of zero–one time operations in multi-stage systems
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Extracorporeal staple technique: an alternative approach to the treatment of critical colostomy stenosis
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Application of impedance imaging to evaluation of organic coating degradation at a local scale
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Ground-State Entanglement Properties of Helium Atom in a Finite Spherical Cavity
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Design of dimensionally stable composites using efficient global optimization method
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