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    Wyświetlanie 1-14 z 14
    Tytuł:
    Electrochemical grinding of titanium-containing materials
    Autorzy:
    Przystupa, K.
    Litak, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/102219.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    hybrid processes
    electrochemical grinding (ECG)
    micro short-circuit
    time-frequency analysis
    Opis:
    The paper focuses on machining difficult-to-cut materials where a significant component is titanium. The paper discusses a complex process of electrochemical grinding (ECG). A practical example was given by discussing the results of ECG. Selected difficult-to-cut materials, along with their typical ECG properties, were compared. In addition, the paper discusses the phenomenon of micro short-circuits constituting a form of an interference characteristic for the process. The results presented in the paper refer to the phenomenon of a micro short-circuits, i.e. the case when a rapid and uncontrolled electrical discharge occurs in the machining zone. The paper presents examples of recorded micro short-circuits and attempts a time-frequency analysis regarding the occurrence of the disturbance. To reveal the dynamics of the ECG process we applied wavelet analysis.
    Źródło:
    Advances in Science and Technology. Research Journal; 2017, 11, 4; 183-188
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of effectiveness of natural organic compounds removal from water in hybrid processes
    Ocena skuteczności usuwania naturalnych związków organicznych z wody w procesach hybrydowych
    Autorzy:
    Malczewska, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/292883.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    clogging of the membrane
    fouling
    hybrid processes
    transport properties
    procesy hybrydowe
    własności transportowe
    zatykanie membran
    Opis:
    Natural organic matter (Natural Organic Matter – NOM) represents a mixture of diverse chemical structure and different properties. The humic substances constitute an important component of NOM, and they are responsible for water color and taste, also they can contribute to the formation of disinfection by-products (DBP). Therefore, removal of NOM is considered to be one of the important technological operations during water treatment. The present study evaluate the effectiveness of NOM removal from water by one of the hybrid process and the results showed that the use of this process allows to improve the efficiency of water purification and also reduces the intensity of blocking membranes. Batch adsorption tests of heated aluminum oxide particles (HAOPs) showed that the NOM removal efficiency has been between 86 to 77% at a dose 5 and 10 mg·dm–3, respectively for both tested natural water.
    Naturalne związki organiczne (ang. natural organic matter – NOM) są produktami rozkładu organizmów roślinnych i zwierzęcych. Stanowią one mieszaninę o bardzo zróżnicowanej budowie chemicznej i zróżnicowanych właściwościach. Substancje humusowe stanowiące istotny składnik NOM są odpowiedzialne za kolor i smak wody, dodatkowo przyczyniają się do powstawania ubocznych produktów dezynfekcji (DBP). Dlatego usuwanie NOM jest uważane za jedną z istotnych operacji technologicznych w trakcie oczyszczania wód. Zwykle w układach oczyszczania wód powierzchniowych do usuwania zawiesin i NOM wykorzystuje się proces koagulacji połączony z sedymentacją. W ostatnich latach coraz większe zainteresowanie w uzdatnianiu wody do celów pitnych odgrywają procesy membranowe. Przedmiotem badań była analiza skuteczności usuwania naturalnych związków organicznych z wody w procesie hybrydowym, a uzyskane wyniki wskazują, że zastosowanie procesu hybrydowego umożliwia poprawę skuteczności oczyszczania wody, a także ograniczenie intensywności blokowania membran. W obu przypadkach analizowanych wód naturalnych skuteczność usuwania NOM przez HAOPs (heated aluminium oxide particles) mieściła się w zakresie od 86%, gdy stężenie wynosiło 5 mg·dm–3 i 77%, gdy stężenie wynosiło 10 mg·dm–3.
    Źródło:
    Journal of Water and Land Development; 2016, 30; 81-85
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of laser and electrochemical interaction in sequential and hybrid micromachining processes
    Autorzy:
    Skoczypiec, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/201232.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    laser beam
    electrochemical machining
    hybrid machining processes
    promień lasera
    obróbka elektrochemiczna
    obróbka hybrydowa
    Opis:
    One of the research and development trends in nowadays manufacturing technology is integration of different manufacturing techniques into single machine tool. In the first part of the paper possibilities, goals, reasons and advantages of thermal and electrochemical interaction have been characterized. As literature review indicates such a connection can be realized as sequential or hybrid machining. The second part of the paper focuses on detailed analysis of laser assisted electrochemical process. For this purpose, the mathematical model of workpiece heating has been developed. Based on obtained results and literature review possibilities of technical realization and potential application have been discussed.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 1; 305-314
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of relational database concerning processes and effects of surface layers deposition
    Aplikacja relacyjnej bazy danych do gromadzenia informacji o procesach i efektach procesów nanoszenia warstw wierzchnich
    Autorzy:
    Dobrodziej, J.
    Ratajski, J.
    Michalski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/258264.pdf
    Data publikacji:
    2006
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
    Tematy:
    model procesu
    nanoszenie warstw
    relacyjna baza danych
    azotowanie
    nawęglanie
    tytanowanie
    PVD
    procesy hybrydowe
    layer deposition process
    relational database
    nitriding
    carburizing
    titanizing
    hybrid processes
    Opis:
    The article presents the application of a database meant for the collection of information related to technological processes of constituting surface layers. A set-theoretical model of processes and a model-based logical structure of the database are shown. The application to retrieve the information stored in the database in case of multidimensional, variable space of parameters for layer deposition processes is presented. Some functional qualities of application for acquisition, searching and fusion of data regarding nitriding, carburizing, PVD and hybrid processes are described.
    W artykule zaprezentowano aplikację bazy danych przeznaczoną do gromadzenia informacji o procesach technologicznych konstytuowania się warstw wierzchnich. Przedstawiono model teoriomnogościowy procesów oraz strukturę logiczną bazy danych opracowaną na podstawie modelu. Zaprezentowano aplikację do obsługi bazy danych w przypadku wielowymiarowej, zmiennej przestrzeni parametrów procesów nanoszenia warstw. Omówiono możliwości użytkowe zastosowania opracowanej aplikacji do gromadzenia, przeszukiwania i fuzji danych o procesach azotowania, nawęglania, PVD, PAPVD oraz procesach hybrydowych.
    Źródło:
    Problemy Eksploatacji; 2006, 2; 127-138
    1232-9312
    Pojawia się w:
    Problemy Eksploatacji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A fault detection method based on stacking the SAE-SRBM for nonstationary and stationary hybrid processes
    Autorzy:
    Huang, Lei
    Ren, Hao
    Chai, Yi
    Qu, Jianfeng
    Powiązania:
    https://bibliotekanauki.pl/articles/1838184.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    fault detection
    sparse autoencoder
    sparse restricted Boltzmann machine
    hybrid industrial processes
    detekcja błędu
    autoenkoder
    proces przemysłowy
    Opis:
    This paper proposes a fault detection method by extracting nonlinear features for nonstationary and stationary hybrid industrial processes. The method is mainly built on the basis of a sparse auto-encoder and a sparse restricted Boltzmann machine (SAE-SRBM), so as to take advantages of their adaptive extraction and fusion on strong nonlinear symptoms. In the present work, SAEs are employed to reconstruct inputs and accomplish feature extraction by unsupervised mode, and their outputs present a knotty problem of an unknown probability distribution. In order to solve it, SRBMs are naturally used to fuse these unknown probability distribution features by transforming them into energy characteristics. The contribution of this method is the capability of further mining and learning of nonlinear features without considering the nonstationary problem. Also, this paper introduces a method of constructing labeled and unlabeled training samples while maintaining time series features. Unlabeled samples can be adopted to train the part for feature extraction and fusion, while labeled samples can be used to train the classification part. Finally, a simulation on the Tennessee Eastman process is carried out to demonstrate the effectiveness and excellent performance on fault detection for nonstationary and stationary hybrid industrial processes.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2021, 31, 1; 29-43
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A fault detection method based on stacking the SAE-SRBM for nonstationary and stationary hybrid processes
    Autorzy:
    Huang, Lei
    Ren, Hao
    Chai, Yi
    Qu, Jianfeng
    Powiązania:
    https://bibliotekanauki.pl/articles/1838177.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    fault detection
    sparse autoencoder
    sparse restricted Boltzmann machine
    hybrid industrial processes
    detekcja błędów
    autoenkoder
    proces przemysłowy
    Opis:
    This paper proposes a fault detection method by extracting nonlinear features for nonstationary and stationary hybrid industrial processes. The method is mainly built on the basis of a sparse auto-encoder and a sparse restricted Boltzmann machine (SAE-SRBM), so as to take advantages of their adaptive extraction and fusion on strong nonlinear symptoms. In the present work, SAEs are employed to reconstruct inputs and accomplish feature extraction by unsupervised mode, and their outputs present a knotty problem of an unknown probability distribution. In order to solve it, SRBMs are naturally used to fuse these unknown probability distribution features by transforming them into energy characteristics. The contribution of this method is the capability of further mining and learning of nonlinear features without considering the nonstationary problem. Also, this paper introduces a method of constructing labeled and unlabeled training samples while maintaining time series features. Unlabeled samples can be adopted to train the part for feature extraction and fusion, while labeled samples can be used to train the classification part. Finally, a simulation on the Tennessee Eastman process is carried out to demonstrate the effectiveness and excellent performance on fault detection for nonstationary and stationary hybrid industrial processes.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2021, 31, 1; 29-43
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Missing observations in daily returns - Bayesian inference within the MSF-SBEKK model
    Autorzy:
    Osiewalski, Krzysztof
    Osiewalski, Jacek
    Powiązania:
    https://bibliotekanauki.pl/articles/483257.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Bayesian econometrics
    hybrid MGARCH-MSV processes
    forecasting unavailable data
    financial markets
    commodity markets
    Opis:
    Often daily prices on different markets are not all observable. The question is whether we should exclude from modelling the days with prices not available on all markets (thus loosing some information and implicitly modifying the time axis) or somehow complete the missing (non-existing) prices. In order to compare the effects of each of two ways of dealing with partly available data, one should consider formal procedures of replacing the unavailable prices by their appropriate predictions. We propose a fully Bayesian approach, which amounts to obtaining the marginal posterior (or predictive) distribution for any particular day in question. This procedure takes into account uncertainty on missing prices and can be used to check validity of informal ways of "completing" the data (e.g. linear interpolation). We use the MSF-SBEKK structure, the simplest among hybrid MSV-MGARCH models, which can parsimoniously describe volatility of a large number of prices or indices. In order to conduct Bayesian inference, the conditional posterior distributions for all unknown quantities are derived and the Gibbs sampler (with Metropolis-Hastings steps) is designed. Our approach is applied to daily prices from six different financial and commodity markets; the data cover the period from December 21, 2005 till September 30, 2011, so the time of the global financial crisis is included. We compare inferences (on individual parameters, conditional correlation coefficients and volatilities), obtained in the cases where unavailable observations are either deleted or forecasted.
    Źródło:
    Central European Journal of Economic Modelling and Econometrics; 2012, 4, 3; 169-197
    2080-0886
    2080-119X
    Pojawia się w:
    Central European Journal of Economic Modelling and Econometrics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Long-Run Relationship between Daily Prices on Two Markets: The Bayesian VAR(2)–MSF-SBEKK Model
    Autorzy:
    Osiewalski, Krzysztof
    Osiewalski, Jacek
    Powiązania:
    https://bibliotekanauki.pl/articles/483271.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Bayesian econometrics
    vector error correction model
    hybrid MGARCH-MSV processes
    financial markets
    commodity markets
    Opis:
    We develop a fully Bayesian framework for analysis and comparison of two competing approaches to modelling daily prices on different markets. The first approach, prevailing in financial econometrics, amounts to assuming that logarithms of prices behave like a multivariate random walk; this approach describes logarithmic returns most often by the VAR(1) model with MGARCH (or sometimes MSV) disturbances. In the second approach, considered here, it is assumed that daily price levels are linked together and, thus, the error correction term is added to the usual VAR(1)–MGARCH or VAR(1)–MSV model for logarithmic returns, leading to a reduced rank VAR(2) specification for logarithms of prices. The model proposed in the paper uses a hybrid MSVMGARCH structure for VAR(2) disturbances. In order to keep cointegration modelling as simple as possible, we restrict to the case of two prices representing two different markets. The aim of the paper is to show how to check if a long-run relationship between daily prices exists and whether taking it into account influences our inference on volatility and short-run relations between returns on different markets. In the empirical example the daily values of the S&P500 index and the WTI oil price in the period 19.12.2005 – 30.09.2011 are jointly modelled. It is shown that, although the logarithms of the values of S&P500 and WTI oil price seem to be cointegrated, neglecting the error correction term leads to practically the same conclusions on volatility and conditional correlation as keeping it in the model.
    Źródło:
    Central European Journal of Economic Modelling and Econometrics; 2013, 5, 1; 65-83
    2080-0886
    2080-119X
    Pojawia się w:
    Central European Journal of Economic Modelling and Econometrics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bayesian Value-at-Risk for a Portfolio: Multi- and Univariate Approaches Using MSF-SBEKK Models
    Autorzy:
    Osiewalski, Jacek
    Pajor, Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/483373.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Bayesian econometrics
    risk analysis
    multivariate GARCH processes
    multivariate SV processes
    hybrid SV-GARCH models
    Opis:
    The s-period ahead Value-at-Risk (VaR) for a portfolio of dimension n is considered and its Bayesian analysis is discussed. The VaR assessment can be based either on the n-variate predictive distribution of future returns on individual assets, or on the univariate Bayesian model for the portfolio value (or the return on portfolio). In both cases Bayesian VaR takes into account parameter uncertainty and non-linear relationship between ordinary and logarithmic returns. In the case of a large portfolio, the applicability of the n-variate approach to Bayesian VaR depends on the form of the statistical model for asset prices. We use the n-variate type I MSF-SBEKK(1,1) volatility model proposed specially to cope with large n. We compare empirical results obtained using this multivariate approach and the much simpler univariate approach based on modelling volatility of the value of a given portfolio.
    Źródło:
    Central European Journal of Economic Modelling and Econometrics; 2010, 2, 4; 253-277
    2080-0886
    2080-119X
    Pojawia się w:
    Central European Journal of Economic Modelling and Econometrics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Removal of organic dye in the hybrid photocatalysis/membrane processes system
    Autorzy:
    Grzechulska-Damszel, J.
    Morawski, A.W.
    Powiązania:
    https://bibliotekanauki.pl/articles/779880.pdf
    Data publikacji:
    2007
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    dwutlenek tytanu
    fotokataliza
    procesy membranowe
    barwniki organiczne
    układy hybrydowe
    titanium dioxide
    photocatalysis
    membrane processes
    organic dyes
    hybrid systems
    Opis:
    The removal of azo dye Acid Red 18 in hybrid photocatalysis/membrane processes systems was investigated. The photocatalytic reactions were conducted in the reactor with photocatalyst suspended in the solution. The reaction solution was recirculated through the ultrafiltration system. A commercially available titanium dioxide (AeroxideŽ P25, Degussa, Germany) was used as a photocatalyst. The solution after the photocatalytic/UF reaction was applied as the feed for the membrane distillation process. The changes of various parameters, including the concentration of the dye, pH and the conductivity of the solution, TOC and TDS content were analyzed during the process. It was found that azo dye Acid Red 18 could be successfully decolourised in the hybrid photocatalysis/UF system. The catalyst particles were retained in the feed solution by means of the ultrafiltration membrane so the obtained permeate was free of TiO2. The application of ultrafiltration together with the photocatalytic process results in the separation of photocatalyst from the treated solution but does not give the complete removal of organic matter from the reaction mixture. Membrane distillation applied with the permeate after the photocatalysis/UF process as a feed gives a complete separation of TOC from the treated solution and the obtained product is practically pure water.
    Źródło:
    Polish Journal of Chemical Technology; 2007, 9, 2; 94-98
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling construction processes: a review of research and dissertations at the Poznań University of Technology
    Modelowanie procesów budowlanych: przegląd badań oraz dysertacji realizowanych w Politechnice Poznańskiej
    Autorzy:
    Kapliński, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/396442.pdf
    Data publikacji:
    2005
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    modelowanie procesów budowlanych
    procesy budowlane
    Politechnika Poznańska
    construction management
    construction engineering
    modelling of processes
    application of mathematical methods
    hybrid methods
    Opis:
    The achievements, grants and awards presented to the Chair of Construction Engineering and Construction Management at PUT in the field of modelling of construction processes are reviewed in the article. The needs of phenomena analysis (e.g. waiting, equilibrium), use of the induction method and an application of hybrid methods have been indicated in the review of the problems and modelling methods. Selected areas, mainly of research published abroad by our authors, have been analysed among other publications in context of discussion of research areas.
    Artykuł przedstawia osiągnięcia, tematy badań oraz nagrody Zakładu Technologii i Organizacji w Budownictwie Politechniki Poznańskiej z zakresu modelowania procesów budowlanych. W ramach przeglądu problemów i metod badawczych zwrócono uwagę na potrzebę analizy zjawisk (np. równowagi, oczekiwania), konieczność stosowania metody indukcji oraz szerszego wykorzystania metod hybrydowych. Wskazano obszary badań oraz dokonano przeglądu publikacji pracowników Zakładu - głównie obcojęzycznych.
    Źródło:
    Civil and Environmental Engineering Reports; 2005, 1; 85-105
    2080-5187
    2450-8594
    Pojawia się w:
    Civil and Environmental Engineering Reports
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Skew Bending of Aircraft Fuselage Panels with “L” and “C” Stringers Mounted by Hybrid Joint
    Ukośne zginanie poszycia samolotu z u sztywnieniami typu “L” i “C”, mocowanymi za pomocą złącza hybrydowego
    Autorzy:
    Sadowski, T.
    Golewski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/355204.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    skew bending of hybrid joint
    plastic deformation processes
    FEA (finite element analysis)
    zginanie ukośne
    złącze hybrydowe
    proces deformacji
    FEA
    metoda elementów skończonych
    Opis:
    A section of fuselage skin with dimension 30 x 200 mm was subjected to numerical study and loaded by skew bending (Fig. 3). The thickness of the skin was 0,6 mm, the length of a leg of an angle “L” profile stringer was 12 mm with 1mm thickness. The angle of inclination α of the load plane to the skin plane varies in the range from 10° to 90° with 10° increment. The elastic - plastic material model of D16T aluminum alloy was used in simulations of the fuselage skin as well as for “L” and “C” profile stringers. In the material model description damage of aluminum alloy was taken into account. An adhesive layer with thickness of 0,1mm was modeled using cohesive elements with the failure mode depending on the shear strength and the tensile strength. The paper presents a comparative analysis of the considered structural elements with application of the unsymmetrical “L” profile or the symmetrical “C” profile with the same cross section area. All numerical studies were performed in Abaqus program. Finally, one can conclude that the stiffness of the structural element with application of the symmetrical “C” profile stringer is stronger, whereas the mechanical response of both versions of the hybrid joint significantly depends on the angle of load inclination α.
    Badaniom numerycznym poddano wycinek poszycia o wymiarach 30x200mm, który następnie poddano obciążeniu poprzez ukośne zginanie, Rys. 3. Grubość blachy poszycia wynosiła 0,6 mm, długość ramienia kątownika równoramiennego 12 mm i grubość ramienia 1mm. Kąt nachylenia α płaszczyzny obciążenia w stosunku do płaszczyzny poszycia zmieniał się w granicach od 10° do 90° z przyrostem co 10°. W symulacjach zastosowano model sprężysto – plastyczny materiału dla poszycia i kształtownika jakim był stop aluminium D16T. W opisie modelu materiału uwzględniono także uszkodzenie stopu aluminium. Warstewka kleju o grubości 0,1 mm była modelowana z wykorzystaniem elementów kohezyjnych, dla których także uwzględniono uszkodzenie przyjmując dane producenta, takiej jak wytrzymałość na ścinanie oraz na rozciąganie. W pracy przedstawiono analizę wpływu zmiany obecnie stosowanego niesymetrycznego kształtownika (kątownik), kształtownikiem symetrycznym (ceownik) o takim samym polu przekroju poprzecznego. Wszystkie badania numeryczne przeprowadzono w programie Abaqus.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 4; 2813-2820
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of Political Processes and the War in Ukraine on the Formation of Generation Alpha and the iGeneration (Z): Defining Specific Features
    Влияние политических процессов и войны на Украине на формирование поколений Альфа и iGeneration (Z): определение особенностей
    Autorzy:
    Kryvachuk, Liudmyla
    Powiązania:
    https://bibliotekanauki.pl/articles/2053362.pdf
    Data publikacji:
    2022-06-30
    Wydawca:
    Wydawnictwo Adam Marszałek
    Tematy:
    Ukraine
    political processes
    hybrid war
    Russian-Ukrainian war
    social
    policy
    social problems
    children
    young
    generation
    iGeneration (Z)
    generation Alpha
    Украина
    политические процессы
    гибридная война
    российско-украинская война
    социальная политика
    социальные проблемы
    дети
    молодёжь
    поколение
    generation Alpha.
    Opis:
    The article attempts to analyse and define the specific features of the iGeneration (Z) and Generation Alpha in Ukraine in the context of the political processes and the war taking place in Ukrainian society. The article discusses the generation issues, taking into account the characteristics of the iGeneration (Z) and Generation Alpha. Assuming that a generation is an identifiable group of people who share a similar time of birth and significant events at critical stages of development, the article presents an original approach to determining the specific features of the iGeneration (Z) and Generation Alpha in Ukraine. The Orange Revolution (2004), the Revolution of Dignity (2014) and the hybrid war (2014-2022) and Russian-Ukrainian war (from 24.02.2022) had a significant impact on the formation of the iGeneration (Z) and Generation Alpha in Ukraine.
    В статье представлены анализ и определение специфики поколений iGeneration (Z) и Generation Alpha в контексте политических и социальных процессов в украинском обществе. А также влияния гибридной войны (2014-2022) и российско-украинской войны (2022) на формирование поколений iGeneration (Z) и Generation Alpha в Украине. В статье рассматриваются вопросы формирования поколений с учетом особенностей iGeneration (Z) и Generation Alpha, поколение рассматривается как группа людей, которую объединяет время рождения и значимые события на критических этапах его развития и формирования. В статье представлен оригинальный авторский подход к определению специфики поколений iGeneration (Z) и Generation Alpha в Украине. Показано, что существенное влияние на формирование поколений iGeneration (Z) и Generation Alpha в Украине оказали Оранжевая революция (2004), Революция Достоинства (2014), гибридная война (2014-2022) и российско-украинская война (2022).
    Źródło:
    Nowa Polityka Wschodnia; 2022, 2(33); 66-89
    2084-3291
    Pojawia się w:
    Nowa Polityka Wschodnia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nowoczesne techniki i technologie inżynierii środowiska
    Novel Methods and Technologies in Environmental Engineering
    Autorzy:
    Miksch, K.
    Cema, G.
    Felis, E.
    Sochacki, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818151.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    tlenowe granule
    zewnątrzkomórkowe polimery
    częściowa nitryfikacja
    proces Anammox
    zaawansowane procesy utleniania
    systemy hybrydowe
    oczyszczalnie hydrofitowe
    dekoloryzacja barwników
    bioremediacja gruntu
    mikoryza roślin
    techniki biologii molekularne
    PCR
    FISH
    aerobic granules
    granule formation
    extracellular polymeric substances
    partially nitrification
    anammox process
    advanced oxidation processes
    hybrid systems
    constructed wetlands
    decolorization
    synthetic dyes
    soil bioremediation
    plant mycorrhization
    molecular biology techniques
    Opis:
    The novel technologies used in environmental engineering were discussed in this paper – the formation of aerobic granules, the Anammox process, the advanced oxidation processes, the use of fungi for dyes decolorization, constructed wetlands, the soil phytoremediation supported by rhizosphere microorganisms and the use of molecular biology technique in environmental engineering. The structure of granular sludge is influenced by EPS production. The average diameter and density of biogranules increase due to EPS production. Although polysaccharides are essential, proteins were found to be the predominant component of aerobic granular sludge. Compared to loosely bound EPS (LB-EPS), tightly bound EPS (TB-EPS) showed more significant correlations with granules formation. This investigation will contribute towards a better understanding of the behavior and composition of EPS in sequencing batch reactors. The traditional nitrification and denitrification processes proceed well with typical municipal wastewater. Nevertheless, there are also nitrogen-rich wastewater streams like landfill leachate or reject waters from dewatering of digested sludge, for which traditional nitrification/denitrification can be generally ineffective due to free ammonia inhibition of nitrification and unfavorable biodegradable carbon content for denitrification. Because of high requirements for oxygen and the necessity for addition of external carbon source, treating such nitrogen-rich streams with nitrification/denitrification would become expensive and unsustainable. The least resources consuming pathway for the conversion of ammonium to nitrogen gas is a combination of partial nitrification and the Anammox process. The main advantages of this process compared to the conventional nitrification/denitrification are: low sludge production, decrease of the aeration costs by almost 60% (only half of the ammonia is oxidized to nitrite in the nitritation process without further oxidation to nitrate), and no need for external organic carbon source addition (Anammox process). Furthermore, anammox bacteria oxidize ammonium under anoxic conditions with nitrite as the electron acceptor, and converse energy for CO2 fixation. Additionally, the biomass yield of the Anammox process is very low (0.08 kg VSS kg NH4-N-1 in comparison to 1 kg VSS kg NH4-N-1 in conventional nitrification/denitrification process) consequently, little sludge is produced. The low sludge production is another factor that contributes to the substantially lower operation costs compared to conventional denitrification systems. Advanced oxidation processes (AOPs) are oxidative methods which are based on the generation of the hydroxyl radicals, which are very reactive and less selective than other oxidants. In the wastewater treatment technology, AOPs can be used in a combination with conventional biological techniques (so called hybrid processes), as pre- and post- treatment processes. The advanced oxidation processes have been used in order to increase the biodegradability and also detoxification of the wastewater. The ability of fungi to degrade lignin-cellulose debris is well known. In addition to these natural molecules they may also degrade synthetic compounds, including synthetic dyes. High effectiveness of Evans blue and brilliant green mixture removal by all tested strains was demonstrated. The process was the most effective and fast in shaken conditions. Finally strain MB removed 90% of tested mixture in shaken samples after 96h. It was the best result reached among all the strains used in the experiment. High removal efficiency was accompanied by a decrease of toxicity (from V class to III class in test with D. magna and from IV class even to non-toxic in test with L. minor). The highest decrease of phytotoxicity was noticed in samples with shaken biomass in which the effect of dyes mixture elimination was the best. The research indicates very high potential of tested strains for decolorization and detoxification of dyes mixture. Constructed wetlands are man-made system mimicking the process occurring in natural wetlands. These systems are considered to be an alternative to more technically advanced waste water treatment technologies. The development of constructed wetlands is envisaged to pursue the following directions grouped according to: the type of the waste water to be treated, target contaminants, treatment intensification methods, ancillary benefits and the locality. Mycorrhiza fungi can be used for phytoremediation proccess. They support plant growth by lowering the stress caused by the lack of phosphorus and water. They produce enzymes participating in several stages of xenobiotics decomposition, which is helpful in their further biodegradation performed by the other rhisospherical organisms. The natural colonisation of PAHs contaminated soil is a long-term process. It could be shortend by adding fungal propagules as an inoculum to the soil. Fungi used for the injections should be isolated from PAHs contaminated soil. That guarantees their survival and development in the contaminated environment. The level of PAHs elimination from soil depends on a type of bioremediation modification used. It was shown that the best results are obtained with monocotylous plants combined with bacterial and fungal biopreparations obtained from contaminated soil. The symbiosis of mycorrhiza fungi with monocotylous plants caused ca. 40% increase of 3, 4, 5 and 30% of 6-ring hydrocarbons removal from soil in comparison with the conventional methods. Important aspect of environmental protection and engineering is the possibility for qualitative and quantitative monitoring of complex microbial communities, responsible for biotechnological processes, such as: soil bioremediation, wastewater treatment or composting. Due to the fact that most of the environmental bacteria cannot be grown in the laboratory conditions molecular techniques are widely used in environmental engineering. Among these methods the Polymerase Chain Reaction (PCR)-based and hybridization-based (such as Fluorescent in situ Hybridization; FISH) techniques are known to be the most useful.
    Źródło:
    Rocznik Ochrona Środowiska; 2015, Tom 17, cz. 1; 833-857
    1506-218X
    Pojawia się w:
    Rocznik Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-14 z 14

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