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Investigation of the distribution of imidazolium ionic liquids in the environment - aggregation in water and sorption on minerals
PublikacjaWpływ cieczy jonowych na środowisko, a w szczególności: migracja do wód powierzchniowych i gruntowych, jak również transport/retencja w gruntach jest determinowany przede wszystkim przez właściwości fizykochemiczne cieczy jonowej jak i właściwości matrycy środowiskowej. Znajomość zjawisk zachodzących w wyniku kontaktu cieczy jonowych z wodą oraz glebą jest jednym z podstawowych warunków oceny ryzyka chemicznego. W pracy wykazano,...
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Distribution and concentration of heavy metals in ash during thermal process sewage sludge
PublikacjaKażdego roku na świecie, obserwuje się znaczący wzrost produkcji osadów ściekowych. Przykładowo w 2006 roku, w Polsce ich ilość osiągnęła 1 mln ton w przeliczeniu na sucha masę, w tym ok. połowa pochodziła z oczyszczalni komunalnych. Problem ich zagospodarowania stanowi przedmiot zainteresowania wielu instytucji zajmujących się ochroną środowiska, zarówno w Polsce, jak i na całym świecie. Ich dotychczasowe wykorzystania polegało...
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Simulation of Residence Time Distribution and Mixing in Reactors with Recirculation Using 2D Approach
PublikacjaIn this paper, we propose a 2D approach in order to create a mathematical model for the determination of the residence time distribution for a flow reactor with recirculation. Apart from characterizing the functional residence time distribution, this model can help improve the operation of the reactor at the design stage. The mathematical model was validated by comparison with experiments carried out in a hydraulic laboratory.
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Improved model of void fraction distribution in two-phase flow in the boundary layer
PublikacjaPraca skupiona jest na eksperymentalnej weryfikacji sił działających na pęcherzyk gazowy przepływający wzdłuż ścianki kanału, a następnie implementacji uzyskanych wyników do zaproponowanego wczesniej przez jednego z współautorów modelu rozkładu stopnia zapełnienia w warstwie przyściennej przepływu dwufazowego. Podczas badań pęcherzyk modelowany był sztywną kulą podwieszoną na strunie. Autorzy przekonują, że pokazany model dobrze...
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A review of the biogeochemical controls on the occurrence and distribution of polycyclic aromatic compounds (PACs) in coals
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Spatial distribution of phosphorus forms in sediments in the Gulf of Gdańsk (southern Baltic Sea)
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A Multicriteria Analysis for the Green VRP: A Case Discussion for the Distribution Problem of a Spanish Retailer
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Zeta potential, effective diameter and multimodal size distribution in oil/water emulsion
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Matrix-based robust joint fingerprinting and decryption method for multicast distribution of multimedia
PublikacjaThis paper addresses the problem of unauthorized redistribution of multimedia content by malicious users (pirates). The solution proposed here is a new joint fingerprinting and decryption method which meets the requirements for both imperceptibility and robustness of fingerprints and scalability in terms of design and distribution of fingerprinted multimedia content. The proposed method uses a simple block cipher based on matrix...
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Uptake, tissue distribution, and metabolism of malachite green in the channel catfish (Ictalurus punctatus)
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Advances in engineering of diameter and distribution of the number of walls of carbon nanotubes in alcohol CVD
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DISTRIBUTION OF LIPIDS AND OXIDATIVE CHANGES THEREIN IN PARTICULARIZED PARTS OF RAINBOW TROUT FILLETS
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Numerical simulation of temperature distribution of heat flow on reservoir tanks connected in a series
PublikacjaThe flow of temperature distribution through a medium in thermodynamic studies plays an important role in understanding physical phenomena in chemical science and petroleum engineering, while temperature distribution indicates the degree of reaction that must be undergone to obtain the final product. Therefore, this paper aims to present and apply the exponential matrix algorithm (EMA), differential transformation algorithm (DTA),...
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Application of Barkhausen effect in the impact assessment of welding to internal stress distribution in steel
PublikacjaThe paper presents identification method of internal stresses in plane steel elements in the chase of deliverance and welding assembly. The assessment was made by means of a non-destructive experimental method based on measurements incorporating local external magnetic field and the measurement of induced voltage, including Barkhausen noise. This method allows a degradation assessment due to internal and external actions, causing...
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Application of Barkhausen effect in the impact assessment of welding to internal stress distribution in steel
PublikacjaThe paper presents identification method of internal stresses in plane steel elements in the chase of deliverance and welding assembly. The assessment was made by means of a non-destructive experimental method based on measurements incorporating local external magnetic field and the measurement of induced voltage, including Barkhausen noise. This method allows a degradation assessment due to internal and external actions, causing...
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Investigation of the vertical distribution of the sound speed of the Gulf of Gdansk in the years 2000-2010
PublikacjaThe conditions of the acoustic wave propagation in the southern Baltic are much more complex than in other shallow waters. In the typical shallow water, seasonal changes in acoustical conditions in the upper layer, of the depth of about 60-70 m, are observed. They are caused by variation of the annual meteorological conditions. Most often, in the deep water layer, acoustical conditions are stable throughout the year. However, in...
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Electricity Supplier Switching Process in Poland – a Process Based on the General Distribution Agreement
PublikacjaPoland, as a Member State of the European Union, is committed to respect the common rules on the electricity market, among other things. One of the most important examples of these regulations is the perception of energy as a commodity subject to competitive market mechanisms. Competitive processes introduced in the national electricity market enable energy consumers, i.a., choice of electricity supplier under the TPA formula....
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Influence of the Shear Cap Size and Stiffness on the Distribution of Shear Forces in Flat Slabs
PublikacjaThe scope of this paper is to investigate analytically and numerically the influence of shear cap size and stiffness on the distribution of shear forces in flat slabs in a slab–column-connections-reinforced concrete structure. The effect of support (shear cap) stiffness on the calculation of the length of the shear control perimeter according to the available methods is presented. Based on the analysis, the authors indicate in...
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Three dimensional fluid equations from distribution function with discontinuity in velocity space
PublikacjaUkład równań typu hydrodynamicznego dla rozwarstwionego gazu w polu grawitacyjnym jest wyprowadzony z równania BKG przy użyciu metody kawałków ciągłej funkcji dystrybucji. Otrzymany układ równań uogólnia układ Naviera-Stokesa dla dowolnych liczb Knudsena.
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A proposition of the computational model for the dynamic analysis of stress and strain distribution in the hip joint
PublikacjaCelem pracy jest sformułowanie zadania modelowania dynamiki odkształceń i rozkładu naprężeń stawu biodrowego, a w szczególności kości udowej, pod wpływem sił mięśniowych oraz zadanych sił zewnętrznych. Rozwiązanie tego zadania pozwoli wyjaśnić niektóre zjawiska np. jakie ruchy kości udowej oraz jakie materiały użyte do jej alloplastyki są przyczyną urazów i poważnych uszkodzeń. Omówiono problemy związane z zastosowaniem metody...
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FE-calculations of stress distribution under prismatic and conical sandpiles within hypoplasticity.
PublikacjaW artykule przedstawiono wyniki numerycznej rozkładu naprężeń pod pryzmatycznymi i stożkowymi stosami piasku w ramach mikropolarnej hipoplastyczności. Wyniki pokazują, że rozkład naprężeń zależy od sposobu napełnienia stożku piaskiem. W niektórych przypadkach, maksymalne naprężenie nie występuje w środku stosu piasku.
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FE-calculations of stress distribution under prismatic and conical sandpiles within hypoplasticity
PublikacjaW artykule przedstawiono wyniki numerycznej rozkładu naprężeń pod pryzmatycznymi i stożkowymi stosami piasku w ramach mikropolarnej hipoplastyczności. Wyniki pokazują, że rozkład naprężeń zależy od sposobu napełnienia stożku piaskiem. W niektórych przypadkach, maksymalne naprężenie nie występuje w środku stosu piasku.
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Numerical modeling of sound intensity distributions around acoustic transducer
PublikacjaThe aim of this research study is to measure, simulate and compare sound intensity distribution generated by the acoustic transducers of the loudspeaker. The comparison of the gathered data allows for validating the numerical model of the acoustic radiation. An accurate model of a sound source is necessary in mathematical modeling of the sound field distribution near the scattering obstacles. An example of such obstacle is a human...
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Determination of energy-transfer distributions in ionizing ion-molecule collisions
PublikacjaThe main objective of this study is to determine the energy transfer occuring in ion-molecule collisions. In order to solve this problem, we followed two approaches; the first one by validating a purely experimental method and the second one by testing a new theoretical model M3C (Microcanonical Metropolis Monte Carlo).
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Analysis of the KZK equation solution for fixed pressure distributions at the piston
PublikacjaPraca dotyczy zagadnienia oddziaływania fal o dużej amplitudzie, generowanych przez przetwornik kołowy o gaussowskim rozkładzie ciśnienia. Model matematyczny zbudowano w oparciu o równania KZK. Do rozwiązania zagadnienia zastosowano metodę różnic skończonych. Badano zmiany ciśnienia fal różnych częstotliwości w obrębie wiązki akustycznej. Wyniki obliczeń numerycznych porównano z odpowiednimi rozwiązaniami analitycznymi
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I protagonisti della grande distribuzione in Europa
PublikacjaThe chapter outlines the main aspects of the history of some of the most important big European department stores (El Corte Ingles, Auchan, Carrefour, LeClerc, Aldi, Esselunga and the Finiper Group,
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New distributional data on Bryophytes of Poland, 1
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Distribution of population by tenure status, 2015 (% of population)
Dane BadawczeFactor affecting the attractiveness of property market in terms of investment, especially of housing, is the ratio of the number of dwellings owned by the population .In 2015, more than a quarter (26.9%) of the EU population lived in their own housing with credit or mortgages, while over 42% occupied their own residential units without credit or mortgages....
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Plasma models, contribution matrix for detector setup and generated projections for plasma emissivity reconstruction in fusion devices
Dane BadawczeThe original plasma models for fusion devices, together with the complementary detector setup in the form of a contribution matrix and generated projections. Samples are packed inside a Plasma Tomography Format (PTF) files which is a part of the Plasma Tomography in Fusion Devices Python package, and inside the general JSON format. The constructed dataset...
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Distribution of relaxation times as a method of separation and identification of complex processes measured by impedance spectroscopy
PublikacjaImpedance spectroscopy is one of the most commonly performed measurements to characterize electronic and electrochemical systems. Impedance spectra have limited resolution and many different processes may overlap what could be the reason of obstructions in its proper later analysis. Up to date, there are three approaches to solve this problem: examining impedance spectra itself, fitting spectra with equivalent circuits, and calculating...
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Distribution and mobility of rare earth elements (Sc,Y) in selected types of soils (Poland)
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Influence of ice concentration and floe-size distribution on cluster formation in sea-ice floes
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Shear-Jamming in Two-Dimensional Granular Materials with Power-Law Grain-Size Distribution
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Sea-ice floe-size distribution in the context of spontaneous scaling emergence in stochastic systems
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Mercury in suspended matter of the Gulf of Gdańsk: Origin, distribution and transport at the land–sea interface
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Qualitative Indicators Used to Select the Placement and Parameters of Energy Storage Installed in the Distribution Network
PublikacjaThe technology related to energy storage has developed in recent years. Continuous improvement of the solutions available on the market resulted in wider usability of energy storage. They are also increasingly used in a distribution network. This study contains a synthesised description of physical features of the energy storage used in distribution networks. Several criteria of algorithms used to determine the placement and...
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Influence of steel brackets supporting crane runway girders structure on the stress distribution in the brackets
PublikacjaThe paper presents a numerical analysis of steel brackets supporting a double-span crane runway girders. The purpose of the study was to assess the new structural solution based on the stress distribution in the brackets. In order to simplify the connection, the bottom flange of the crane runway girder is based directly on the upper flange of the bracket. As a result, the support reaction is no longer applied in the plane of the...
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Multi-nodal PWR reactor model — Methodology proposition for power distribution coefficients calculation
PublikacjaIn the paper the multi-nodal Pressurized Water Reactor (PWR) model called Mann’s model is presented. This models is used for modelling purposes of the heat transfer from fuel to coolant in reactor core. The authors expand widely used in literature approach by defining additional coefficients for the heat transfer model. These parameters approximate the power generation distribution in the PWR reactor core according to the to the...
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Analysis of energy recovery from surplus water pressure of municipal heat distribution network
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ONLINE DISTRIBUTION OF INSURANCE OF CIVIL LIABILITY OF OWNERS OF VEHICLES, THE EXPERIENCE OF POLAND, OPPORTUNITIES OF UKRAINE
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Electrode arrays applicable to EIT based mine detection: a comparison ofspatial sensitivity distribution.
PublikacjaPrzebadano trzy konfiguracje matryc elektrodowych. Określono optymalne wzorce pobudzeń oraz odpowiadające im rozkłady czułości.
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Hierarchical model predictive control of integrated quality and quantity in drinking water distribution systems
PublikacjaW artykule zaproponowane zostało zintegrowane podejście do sterowania ilością i jakością w systemach zaopatrzenia i dystrybucji wody. Sterowanie zintegrowane polega na optymalizowaniu kosztów operacyjnych zaspokajając zapotrzebowanie na wodę o wymaganej jakości i spełniając ograniczenia systemu. To zagadnienie sterowania optymalizującego jest zagadnieniem złożonym z powodu nieliniowości, dużego wymiaru, ograniczeń na wyjście, występowania...
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Distribution and extent of benthic habitats in Puck Bay (Gulf of Gdańsk, southern Baltic Sea)
PublikacjaThe majority of the southern Baltic Sea seabed encompasses homogenous soft-bottom sediments of limited productivity and low biological diversity, but shallow productive areas in the coastal zone such as wetlands, vegetated lagoons and sheltered bays show a high variety of benthic habitat types offering favourable biotopic conditions for benthic fauna. Within Polish marine areas, semi-enclosed Puck Bay (the western part of the...
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Mercury in suspended matter of the Gulf of Gdańsk: Origin, distribution and transport at the land–sea interface
PublikacjaThe coastal regions of inland seas are particularly vulnerable to Hg pollution. An important carrier of toxic Hg in the marine environment is suspended matter originating from multiple sources. The present study was conducted in the Gulf...
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Invasive giant hogweeds in Poland: Risk of burns among forestry workers and plant distribution
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Robust output prediction of differential – algebraic systems – application to drinking water distribution system
PublikacjaThe paper presents the recursive robust output variable prediction algorithm, applicable for systems described in the form of nonlinear algebraic-differential equations. The algorithm bases on the uncertainty interval description, the system model, and the measurements. To improve the algorithm efficiency, nonlinear system models are linearised along the nominal trajectory. The effectiveness of the algorithm is demonstrated on...
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Visual Attention Distribution Based Assessment of User's Skill in Electronic Medical Record Navigation
PublikacjaCurrently, the most precise way of reflecting the skills level is an expert’s subjective assessment. In this paper we investigate the possibility of the use of eye tracking data for scalar quantitative and objective assessment of medical staff competency in EMR system navigation. According to the experiment conducted by Yarbus the observation process of particular features is associated with thinking. Moreover, eye tracking is...
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Microscopic Imaging to Visualize the Distribution of Dietary Nucleic Acids in Food Products of Various Origins
PublikacjaDietary nucleic acids (dietNAs) are being increasingly recognized as important food components with nutritional value. However, the precise dietary recommendations for dietNAs are limited, because established methods for determining the quantity and nutritional role of dietNAs are still lacking. One of the tools to narrow this gap could be microscopic imaging, as a convenient approach to visualize the abundance and distribution...
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Distribution of pollutants in the Odra River system part III. Organic pollutants in bottom sediments
PublikacjaW pracy przedstawiono wyniki badań próbek osadów dennych pobranych (w okresie 1997-2000) w ramach Międzynarodowego Programu Badań Dorzecza Rzeki Odry (w trakcie 8 Kampanii) na zawartość szerokiej gamy związków organicznych (pestycydy, lotne związki organiczne, wielopierścieniowe węglowodory aromatyczne, chlorobenzeny, polichlorowane bifenyle).
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Circumferential temperature distribution during pool boiling of R 141b onhorizontal modified tubes.
PublikacjaZaproponowano własną bierną, metodę intensyfikacji przejmowania ciepła w obszarze górnej tworzącej rurki w celu zminimalizowania obwodowego rozkładu temperatury. Metoda polega na naniesieniu aluminiowej warstwy porowatej tylko na części powierzchni rurki - właśnie w obszarze górnej tworzącej.