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Dynamically positioned ship steering making use of backstepping method and artificial neural networks
PublicationThe article discusses the issue of designing a dynamic ship positioning system making use of the adaptive vectorial backstepping method and RBF type arti cial neural networks. In the article, the backstepping controller is used to determine control laws and neural network weight adaptation laws. e arti cial neural network is applied at each time instant to approximate nonlinear functions containing parametric uncertainties....
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Research on entrepreneurship – the forms of entrepreneurship
PublicationThe aim of this article is to present suggestions for future directions of research on entrepreneurship, with particular emphasis on different forms of entrepreneurship. The suggestions are preceded by a brief review of research on entrepreneurship. The article is theoretical in nature and does not present any own research, although its content is based on multiple years of experience in studying this phenomenon. The forms of entrepreneurship...
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Review of hydrogen production technologies for automotive sector – thermodynamic analysis of energy and exergy losses
PublicationFew recent years has shown that hydrogen technology has a good chance to replace petroleum technology in automotive sector. However, hydrogen in pure form practically does not occur on Earth. That is why H2 form is used only as an energy carrier and it must be produced using another source of energy form water or hydrocarbon fuels. In this paper short overview of hydrogen production technology has been presented, with energy and...
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Three solvers for MIMO noise radar clutter cancellation - a performance comparison
PublicationThe problem of canceling strong clutter echos in a MIMO noise radar is considered. Execution times of three algorithms is compared. The first solution is a standard Least Squares approach employing Cholesky decomposition of the transmitted signal sample autocorrelation matrix. The second approach is based on careful waveform design which guarantees that the signal sample autocorrelation matrix has Toeplitz structure. This enables...
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Module architecture as alternative approach to traditional construction processes
PublicationModule architecture today is a special type of building construction process that combines repetitive design, low-cost production based on prefabricated elements and fast erection. Module does not mean the same as modular. In general, module architecture today refers to the design of any system composed of separate components, manufactured before in factory, that can be connected together at the building site much faster than normally....
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On adaptive selection of estimation bandwidth for analysis of locally stationary multivariate processes
PublicationWhen estimating the correlation/spectral structure of a locally stationary process, one should choose the so-called estimation bandwidth, related to the effective width of the local analysis window. The choice should comply with the degree of signal nonstationarity. Too small bandwidth may result in an excessive estimation bias, while too large bandwidth may cause excessive estimation variance. The paper presents a novel method...
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Biblioteka w nowym świecie czy nowy świat w bibliotece
PublicationWraz z głębokimi zmianami zachodzącymi we współczsnym świecie, zmieniają się także instytucje kultury, w tym również biblioteki. Na podstawie badań ilościowych i jakościowych autorki zaproponowały innowacyjny sposób szacowania całkowitej wartości i produktywności wspólczesnych bibliotek.
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Parki tematyczne w rozwoju lokalnym miasteczek i wsi
PublicationObecnie niemal każde polskie miasto i wieś ma na celu znalezienie dobrego pomysłu na swój rozwój społeczno-gospodarczy. Najczęściej jest nim założenie parku tematycznego. Dobrze się dzieje, gdy takie przedsięwzięcie wspiera lokalne tradycje, zwyczaje i walory kulturowe miasta czy wsi; gdy promowane są miejscowe produkty i żywność. Niestety, nie zawsze tak jest. Niektóre miasta i gminy chętniej przyjmują zupełnie inną politykę...
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Efektywność skrępowania betonu w grubościennych słupach typu Concrete-Filled Steel Tube o przekroju kołowym
PublicationW słupach typu CFST w stanie granicznym dochodzi do zwiększenia wytrzymałości betonu rdzenia na skutek jego skrępowania. Zaistnienie tego zjawiska zależy od wielu czynników. Jednym z najważniejszych z nich jest sztywność obwodowa płaszcza stalowego. Jej wpływ na efektywność wzrostu wytrzymałości betonu rdzenia przebadano eksperymentalnie na grupie 48 grubościennych słupów CFST. Wykazano, że nadmierne zwiększanie grubości płaszcza...
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Enhancing Availability for Critical Services
PublicationTraditional approaches to provide classes of resilient service take the physical network availability as an input and then deploy redundancy and restoration techniques at various layers, often without full knowledge of mappings between layers. This makes it hard (and often inefficient) to ensure the high availability required by critical services which are typically a small fraction of the total traffic. Here, the innovative technique...
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Aktualność "Sporu o istnienie świata" Romana Ingardena w świetle współczesnych mu stanowisk filozoficznych
PublicationParadoksalnie Ingarden nie jest w stanie wykazać, że świat realny istnieje w pewnym zasadniczym sensie „istnienia”, bo przyjmuje taki sam jak Husserl egologiczny, przeżyciowy model czystej świadomości i sam podążając za Husserlem przyjmuje istnienie dwóch dziedzin przedmiotów indywidualnych: dziedzinę czystej świadomości (rozumianej po husserlowsku jako strumień przeżyć) i dziedzinę świata realnego za punkt wyjścia swoich rozważań....
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Reaktory elektrochemiczne w przemyśle - konstrukcja i zastosowania
PublicationZ biegiem lat reakcje elektrochemiczne przestały być postrzegane jedynie jako eksperymenty laboratoryjne lub proste baterie. Chociaż mechanizm reakcji i budowa prostych reaktorów znana jest ludzkości już od ponad 100 lat w ostatnich latach można zauważyć największy wzrost zainteresowania tą dziedziną. Nowy stale opracowywane są lepsze projekty budowy reaktorów. Modyfikacje to nie tylko rodzaje i formy materiałów, z których wykonane...
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Complex Predictive Solution for Computerized Processes in Tire Industry
PublicationFollowing increasing market needs of productivity, cost reduction and safety requirements, computerized industry are faced to finding optimum between economic aspects of business and safety-related risk management. Modern factories equipped with computerized processes and extended diagnostic tools to support operator do not often use of all information’s which comes from the equipment. Some of the relations between the events are...
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Analiza konwencjonalnych nośników energii z biomasą do celów grzewczych. Cz. 1. Charakterystyka problemu oraz metodyka badań
PublicationW artykule przedstawiono istotę problemu zastosowania konwencjonalnych źródeł energii (węgla kamiennego, gazu ziemnego, oleju opałowego oraz energii elektrycznej pozyskiwanej z krajowego systemu elektroenergetycznego – KSE) w odniesieniu do odnawialnego źródła energii – OZE (jakie stanowi biomasa). Przedstawiona w artykule metodyka stanowi podstawę ilościowej realizacji analizy ekonomicznej i ekologicznej ww. nośników energii,...
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Analiza konwencjonalnych nośników energii z biomasą do celów grzewczych. Cz. 2. Studium przypadku
PublicationMateriał stanowi kontynuację podjętego przez Autorów problemu. W artykule przedstawiono wyniki analizy ekonomicznej oraz ekologicznej biomasy (pellety), w porównaniu z innymi, powszechnie stosowanymi nośnikami energii (węglem kamiennym, gazem ziemnym, olejem opałowym oraz energią elektryczną wytwarzaną w krajowym systemie elektroenergetycznym – KSE). Powyższą analizę wykonano na przykładzie budynku mieszkalnego, stanowiącego domek...
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Portable parallel simulator using MPI for 2D and 3D domains: design and performance testing
PublicationW artykule prezentujemy szczegóły projektowo-implementacyjne naszego modularnego kodu symulacyjnego z wykorzystaniem MPI, w tym nakładaniem obliczeń i komunikacji. Podkreślamy modularność naszej implementacji pozwalającą na łatwą adaptację kodu dla innych zasotosowań. Prezentujemy związek pomiędzy przyspieszeniem obliczeń, rozmiarem i kształtami trójwymiarowych domen z różnymi stosunkami liczby węzłów aktualizowanych przez procesor...
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E-Estonia as a role model? Some general considerations and applicability in France
PublicationEstonia has recently been widely recognised – in the policy circles, academia, as well as the media space – as one of the more advanced nation states when it comes to digital government (and governance) transformation (e.g. Margetts and Naumann, 2017; Heller, 2017). Ever greater attention Estonia attracted with the two most recent digital government initiatives, namely the e-Residency and the virtual data embassy, both first of...
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Determination of Biogenic Amines in Wine Using Micellar Electrokinetic Chromatography
PublicationProduction on a large-scale of fermented alcoholic drinks made from different kinds of fruits is carried out in homes. Although wine laws regulating home production exist, they do not include upper concentration limits of biogenic amines. Therefore, a quick and inexpensive way to determine BAs in wine is crucial. A new analytical method based on micellar electrokinetic chromatography has been developed for the separation of the...
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Pieprzyk Pypcio Znamienity
PublicationPrzepiękna i edukacyjna książka opowiadająca o losach pieprzyka o imieniu Pypcio Znamienity, jego rodziny i dalekiego kuzyna Czarnego. Domem dla naszych bohaterów jest skóra Melanii, która uwielbia wycieczki na plażę.W książeczce oprócz zabawnej, wciągającej i wzruszającej przygody czytelnicy znajdą edukacyjne plansze, które pomogą im zrozumieć na czym polega wizyta u dermatologa, jak przebiega zabieg wycięcia pieprzyka,...
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Numerical Algorithms of Planning Safe Ship Trajectories for ARPA Systems
PublicationGłównym celem pracy było zaprojektowanie metody znajdowania bezpiecznych trajektorii statków, która byłaby prosta w implementacji, szybka (niska złożoność obliczeniowa)i deterministyczna, elastyczna (umożliwiałaby zastosowanie dowolnej domeny). Aby zrealizować cel należało zbadać bieżący stan wiedzy w dziedzinie,zaprojektować nową metodę, zaimplementować metodę (wraz ze wszystkimi niezbędnymi algorytmami) w środowisku programistycznym...
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Designing drainage systems – possible application of advanced calculations and hydrodynamical modeling
PublicationNowadays we can observe a faster development of drainage systems than ever. This gives us an opportunity to de- sign more efficient systems that can cope with the rapid growth of cities and, what comes with it, impervious surfaces. Here the question arises, whether traditional methods used in drainage system design are potent enough to cope with the emerging prob- lems and difficulties. In this paper we will make...
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How non-technological innovation saved the day by using ICT
PublicationCertainly, the current pandemic situation provides a lot of evidence of the need for non-technological innovations, both in the area of company organization and marketing. Socio-cultural innovations are not less important. Therefore, the role of non-technological innovation during the COVID-19 pandemic is discussed in the sixth chapter. Innovations supported by digital solutions have become a silent heroes for many companies as...
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What is in a name: Defining “high entropy” oxides
PublicationABSTRACT High entropy oxides are emerging as an exciting new avenue to design highly tailored functional behaviors that have no traditional counterparts. Study and application of these materials are bringing together scientists and engineers from physics, chemistry, and materials science. The diversity of each of these disciplines comes with perspectives and jargon that may be confusing to those outside of the individual fields,...
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Shallow Water Experiment of OFDM Underwater Acoustic Communications
PublicationThe large variability of communication properties of underwater acoustic channels, and especially the strongly varying instantaneous conditions in shallow waters, is a challenge for the designers of underwater acoustic communication (UAC) systems. The use of phase modulated signals does not allow reliable data transmission through such a tough communication channel. However, orthogonal frequency-division multiplexing (OFDM), being...
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Numerical Test for Stability Evaluation of Discrete-Time Systems
PublicationIn this paper, a new numerical test for stability evaluation of discrete-time systems is presented. It is based on modern root-finding techniques at the complex plane employing the Delaunay triangulation and Cauchy's Argument Principle. The method evaluates if a system is stable and returns possible values and multiplicities of unstable zeros of the characteristic equation. For state-space discrete-time models, the developed test...
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Reactions of Lithium Salts of Triphosphanes tBu2P-PLi-PtBu2 and tBu2P-PLi-P(NEt2)2 with Metal Complexes [(R3P)2MCl2] (M = Ni, Pd, Pt, R3P = Et3P, pTol3P, Ph2EtP, iPr3P)
PublicationtBu2P-PLi-PtBu2·2THF reacts with [(R3P)2MCl2] (M = Pt, Pd, Ni; R3P = Et3P, pTol3P, Ph2EtP, iPr3P) to yield isomers of [(1,2-η-tBu2P=P-PtBu2)M(PR3)Cl], in which the tBu2P-P-PtBu2 ligand adopts the arrangement of a side-on bonded 1,1-di-tert-butyl-2-(di-tert-butylphosphanyl)diphosphenium cation. tBu2P-PLi-P(NEt2)2·2THF reacts with [(R3P)2MCl2] but does not form complexes with a tBu2P-P-P(NEt2)2 moiety, however, splitting...
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HYBRID REDUCED MODEL OF ROTOR
PublicationIn the paper, the authors describe the method of model reduction of a rotor system. The proposed approach enables to obtain a low order model including e.g. nonproportional damping or the gyroscopic effect. This method is illustrated using the example of a rotor system. First, a model of the system was built without gyroscopic and damping effects by using the rigid finite element method. Next, this model was reduced. Finally, two...
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THE PROBLEM OF THE BANKING SYSTEM STABILITY IN THE LITERATURE
PublicationThe article is an overview of the literature output in the field of banking sector stability. In the literature a plethora of definitions of the term may be encountered. There is no universal definition of the term. Therefore, the article proposes a unique division of the existing explanations into the following groups: stability determined by the quality of the banking sector, stability in terms of its influence on the macroeconomic...
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Efficiency of acoustic heating in the Maxwell fluid
PublicationThe nonlinear effects of sound in a fluid describing by the Maxwell model of the viscous stress tensor is the subject of investigation. Among other, viscoelastic biological media belong to this non-newtonian type of fluids. Generation of heating of the medium caused by nonlinear transfer of acoustic energy, is discussed in details. The governing equation of acoustic heating is derived by means of the special linear combination...
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Postulates for measures of genuine multipartite correlations
PublicationA lot of research has been done on multipartite correlations. However, it seems strange thatthere is no denition of so called genuine multipartite correlations. In this paper we propose threereasonable postulates which each measure or indicator of genuine multipartite correlations (or gen-uine multipartite entanglement) should satisfy. We also introduce degree of correlations which givespartial characterization of multipartite...
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System setup and software for cyclic, staircase and square wave voltammetry measurements
PublicationHardware dedicated for electrochemical measurement sometimes does not allow performing certain voltammetry experiments. Staircase and square wave voltammetry, techniques which have many advantages comparing with standard voltammetric techniques, are rarely implemented in software controlling electrochemical measuring equipment. These methods, however, can be relatively easy realized with some addition...
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Efficiency of acoustic heating in the Maxwell fluid
PublicationThe nonlinear effects of sound in a fluid describing by the Maxwell model of the viscous stress tensor is the subject of investigation. Among other, viscoelastic biological media belong to this non-newtonian type of fluids. Generation of heating of the medium caused by nonlinear transfer of acoustic energy, is discussed in details. The governing equation of acoustic heating is derived by means of the special linear combination...
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PRE-FAILURE CONDITION AND THE METHOD OF REPAIRING GLUED TIMBER ROOF BEARS
PublicationDesign documentation of glued-laminated timber roof girders is in many cases very general, does not contain details and design solutions, and the contractors do not have experience in the implementation of this type of structure. Design and execution errors, including those related to glued laminated timber roof girders, not only affect the safety and durability of the structure of the facility in which they were built in, but...
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Real-Time Monnitoring of Vegetable Oils' Thermal Degradation Using Proton Transfer Reaction Mass Spectrometry
PublicationThe volatile aldehydes, which are generated during frying, can be harmful to human health, therefore the concentration of these compounds in frying fumes should be monitored. In addition, aldehydes are markers of oils’ quality, and so it is possible to determine shelf-life or suitability for frying of these oils. Commonly, in order to determine aldehydes concentration gas chromatography is performed, however it does not allow for...
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Prospects of Decreasing Power Losses in a Hydrostatic Thrust Bearing
PublicationIn numerous machines, axial load is carried by tilting pad thrust bearings known since the beginning of 20th century. These bearings are commonly bath lubricated, which is simple, does not require any additional pumps, and, due to this, such systems are highly reliable. In a contemporary technology, however, minimization of friction losses became an important goal of machinery improvement. Calculations based on elementary rules...
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Zaufanie w zespole projektowym a (kobiecy) model przywództwa
PublicationArtykuł prezentuje wyniki badań dotyczące znaczenia czynników kształtujących zaufanie w pracy zespołowej, do których należą: adekwatne nagradzanie, dzielenie się informacjami, ustalone cele i zasady pracy, przejrzystość środowiska i otwarta komunikacja. Wyniki koncentrują się na zachowaniach lidera/ przywódcy, które maja wpływ na kształtowanie zaufanie w zespole i pokazują różnice w zależności od płci.
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ZINTEGROWANE ZARZĄDZANIE STREFĄ PRZYBRZEŻNĄ ORAZ URBANISTYKA – PROJEKT NOWYCH SPECJALNOŚCI NA KIERUNKU GOSPODARKA PRZESTRZENNA NA POLITECHNICE GDAŃSKIEJ
PublicationNa studiach II stopnia na kierunku gospodarka przestrzenna na Wydziale Architektury Politechniki Gdańskiej w 2017 r. otwierane są dwie specjalności: urbanistyka i zintegrowane zarządzanie strefą przybrzeżną. Trzon programu studiów dla obu specjalności jest wspólny i oparty na dotychczasowych standardach kształcenia na tym kierunku. Specjalność zintegrowane zarządzanie strefą przybrzeżną jest odpowiedzią na konieczność wprowadzenia...
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The Environmental Benefits of Photovoltaic Systems: The Impact on the Environment in the Production of Photovoltaic Systems: With a Focus on Metal Recovery
PublicationGreenhouse gases (GHGs) such as carbon dioxide, nitrous oxide and methane, trap heat and energy, thus preventing solar radiation from escaping back into space. As the quantity of greenhouse gases in the atmosphere increases so does the trapped heat and corresponding global temperature. As a result, storms become more violent, droughts more prevalent, glaciers melt, and sea levels rise, to name but a few effects of a rapidly changing...
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Precise Point Positioning Method Based on Wide-lane and Narrow-lane Phase Observations and Between Satellites Single Differencing
PublicationThe issue of using PPP method in position determination was formed in 1997. In most developed methods, ionospheric-free linear combination is used in order to eliminate the impact of the ionospheric delay. However, this approach does not provide the directly determination of the total value of the ambiguities, and the ambiguities for the individual signals. Therefore, in many publications methods of avoiding these deficiencies...
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Sources of Market Information, Its Quality and New Product Financial Performance
PublicationWhile we observe a growing interest in the role of market information in new product development (NPD), existing research has still largely ignored the quality of market information that is a crucial issue in the era of the information society. What does affect the quality of market information in new product development projects, and how does this quality influence the financial performance of new products? In this paper, we address...
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Detoxification of parabens using UV-A enhanced by noble metals—TiO2 supported catalysts
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Noble metal–TiO2 supported catalysts for the catalytic ozonation of parabens mixtures
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Environmental preservation of emerging parabens contamination: effect of Ag and Pt loading over the catalytic efficiency of TiO 2 during photocatalytic ozonation
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The Impact of Lexicon Adaptation on the Emotion Mining From Software Engineering Artifacts
PublicationSentiment analysis and emotion mining techniques are increasingly being used in the field of software engineering. However, the experiments conducted so far have not yielded high accuracy results. Researchers indicate a lack of adaptation of the methods of emotion mining to the specific context of the domain as the main cause of this situation. The article describes research aimed at examining whether the adaptation of the lexicon...
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Reaction of aniline with ammonium persulphate and concentrated hydrochloric acid: Experimental and DFT studies
PublicationIn this paper, the reaction of aniline with ammonium persulphate and concentrated HCl was studied. As a result of our experimental studies, 2,4,6-trichlorophenylamine was identified as the main product. This shows that a high concentration of HCl does not favour oxidative polymerisation of phenylamine, even though the ammonium persulphate/HCl system is widely used in polyaniline synthesis. On the basis of the experimental data...
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Detection of ferromagnetic objects in local magnetic anomaly of the Baltic Sea
PublicationIn geological researches several kinds of methods are applied to discovering the natural resources. Planes, helicopters and UAVs (UnmAnned Vehicle) are used in researches in large areas. The gravity, electromagnetic and magnetic methods, which are used in geological researches, are presented in this paper. The special attention was paid to magnetic systems installed on mobile platforms. The magnetic field of the Earth obtained...
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Fashion and Tourism: Parallel Stories of Two "Dream Marvels".
PublicationFashion and tourism are two social, cultural, and economic phenomena that have both numerous connections and surprising similarities. These are not new: they have been built and developed since the beginnings of tourism as a modern social phenomenon, emerged in Europe in the context of the industrial revolution. They consolidated in the first decades of the 21st century, in a context where both phenomena have completed their “mass”...
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A Fast Method of Separation of the Noisy Background from the Head-Cross Section in the Sequence of MRI Scans
PublicationThe paper presents a new method of removing the noisy background from the sequence of magnetic resonance imaging (MRl) scans. The sequence of scans is required in order to monitor a passage of a contrast agent through the brain tissue. The scans contain the noisy head-cross data and also the noisy background data. The latter has to be removed and excluded from a further analysis. It is achieved by applying some basic morphological...
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Unicyclic graphs with equal total and total outer-connected domination numbers
PublicationLet G = (V,E) be a graph without an isolated vertex. A set D ⊆ V (G) is a total dominating set if D is dominating and the in- duced subgraph G[D] does not contain an isolated vertex. The total domination number of G is the minimum cardinality of a total domi- nating set of G. A set D ⊆ V (G) is a total outer–connected dominating set if D is total dominating and the induced subgraph G[V (G)−D] is a connected graph. The total outer–connected...
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Structural Factors Affecting Cytotoxic Activity of (E)-1-(Benzo[d ][1,3]oxathiol-6-yl)-3-phenylprop-2-en-1-one Derivatives
PublicationDerivatives of (E)-1-(5-alkoxybenzo[d][1,3]oxathiol-6-yl)-3-phenylprop-2-en-1-one (1) demonstrated exceptionally high in vitro cytotoxic activity, with IC50 values of the most active derivatives in the nanomolar range. To identify structural fragments necessary for the activity, several analogs deprived of selected fragments were prepared, and their cytotoxic activity was tested. It was found that the activity depends on combined effects...