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Search results for: SINE-GRODON
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Investigations of broadband multilayered coupled line couplers
PublicationW pracy przedstawiono dwa układy szerokopasmowych sprzęgaczy 3dB. Pierwszy układ zrealizowany jest w oparciu o linie paskowe z rowkowanym ekranem. Drugi układ to zmodyfikowany układ sprzęgacza mikrofalowego zrealizowanego w oparciu o linie mikropaskowe ze wspólną masą. Zaproponowane układy sprzęgaczy odznaczają się szerszym pasmem pracy w porównaniu do układów prezentowanych w literaturze. Wyniki symulacji układów zostały zweryfikowane...
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Visualisation forms in MCM Side Scan Sonar
PublicationArtykuł dotyczy organizacji zobrazowań na monitorach zmodernizowanych w Katedrze Systemów Elektroniki Morskiej a przeznaczonych do poszukiwania min sonarów bocznych z holowanymi nośnikami anten. We wprowadzeniu opisano strukturę takiego sonaru oraz sposób pozyskiwania i charakter odbieranych sygnałów jako podstawę organizowania zobrazowań efektów nasłuchu. Dalej opisano inne czynniki wpływające na organizację obrazów na monitorach...
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Clothing sets with thermoregulation function for mine rescuers
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Impulse measurement accuracy of transmission line earthings
PublicationLinie przesyłowe elektroenergetyczne są wyposażone w przewody odgromowe łączące wierzchołki konstrukcji poszczególnych słupów. Zastosowana metoda pomiarów z użyciem udarów prądowych pozwala ocenić rezystancę uziemienia bez odłączania przewodów uziemiających od konstrukcji słupa. W pracy zamieszczono wyniki symulacji komputerowych i pomiarów rzeczywistych uziomów wskazujące, że wpływ równoległego połączenia uziemień całej linii...
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Ethernet end-to-end. Eine universelle Netzwerktechnologie
PublicationW monografii przedstawiono rozwiazania stosowane w siecich Ethernet. Po prezentacji podstaw działania sieci Ethernet, omówiono wszystkie najnowsze rozwišzania umożliwiające zdominownie przez Ethernet nie tylko sieci lokalnych LAN, ale także MAN, WAN, sieci dostępowych oraz przemysłowych. Dokonano opisu i analizy koncepcji Ethernet End-to-End.
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Routing equal-size messages on a slotted ring
PublicationAnalizujemy problem routingu wiadomości w sieci slotted ring, biorąc pod uwagę dwa kryteria optymalizacyjne: długość uszeregowania oraz liczbę 'cykli' pracy sieci. Optymalny routing dla wiadomości o rozmiarze k jest silnie NP-trudny, natomiast dla k=q, gdzie q jest rozmiarem sieci, można obliczyć w czsie O(n^2log n) dla pierwszego kryterium. Podajemy również algorytm o czasie działania O(nlog n) oraz o stałym współczynniku dobroci....
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Catalyst size dependencies for carbon nanotube synthesis
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Fish size distribution from acoustic data
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Stability of trusses with linear elastic side-supports
PublicationThe present research is devoted to study of a lateral buckling of truss with linear elastic side supports. The elastic support reaction in relation to force in compressed chord and coefficient of buckling length related to side support distance are also calculated. The effect of slope of side support on limit force is also considered. The nonlinear analysis of two roof trusses are carried out. The results are compared to design...
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Meander microstrip line with defected ground structures
PublicationW artykule omówiono koncepcję miniaturyzacji sekcji linii mikropaskowej poprzez modyfikację brzegu linii oraz warstwy metalizacji masy. W pracy zaprezentowano projekt oraz wyniki eksperymentu sprzęgacza gałęziowego skonstruowanego w oparciu o linię meandrową z zaburzoną warstwą metalizacji masy. Pomierzone charakterystyki transmisyjne potwierdzają atrakcyjność zastosowanych metod redukcji zajmowanej przez układ powierzchni. Osiągnięto...
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Preparation of silver nanoparticles with controlled particle size
PublicationNanocząstki srebra wykazują zdolność absorpcji promieniowania widzialnego, która jest efektem istnienia powierzchniowego plazmonu. W zależności od kształtu i wielkości cząstek obserwuje się różną barwę koloidów srebra. W wyniku przeprowadzonych badań otrzymano nanocząstki srebra metodą chemicznej redukcji. Zaobserwowano wpływ rodzaju reduktora (kwas askorbinowy, borowodorek sodu), stabilizatora (PVP, PVA) oraz prekursora srebra...
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Towards the value-based design of on-line services
PublicationThe paper identifies economic factors shaping customer bahaviour in on-line services in two interrelated dimensions; (1) economic needs and requirements, relevant to expected benefits and values perceived by customers; (2) technical components, allowing technical realization of on-line services. Technical components were cathegorized into four groups, creating so-called VIPR model: Visual, Interactive, Process and Relationship-relevant...
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Site-selective magnetic order of neptunium inNp2Ni17
PublicationWe present the results obtained by superconducting quantum interference device (SQUID) magnetometry, specific heat, and Mossbauer spectroscopy measurements carried out on Np2Ni17 polycrystalline samples. We show that long-range magnetic order, with a moment mu((2b)) similar to 2.25 mu(B), occurs below T-N = 17.5 K on the Np (2b) sites. A nontrivial situation is observed in that the other Np sites (2d) do not take part to the order...
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Influences of grain shape and size distribution on permeability
PublicationThe present study investigates the effects of shape and size distributions of grains on the coefficient of permeability (k). A series of constant head permeability tests were performed to characterize the coefficient of permeability. Three particle size ranges (4.75- 0.075, 1.18- 0.075 and 0.300-0.075 mm) of two different sands (Narli Sand, Crushed Stone Sand) having different shapes were tested in a constant head permeability...
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An Analysis of Multistrip Line Configuration on Elliptical Cylinder
PublicationA configuration of multistrip lines mounted on a multilayer dielectric coated elliptic cylinder is investigated in this paper. A full-wave analysis and a moment-method calculation are employed. The analysis is carried out considering the expansion of the field as a series of Mathieu functions. Both open and shielded lines are considered in the analysis. Propagation coefficients and characteristic impedances are calculated for the...
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Symmetrical power line conditioner - basic properties
PublicationIn this paper the basis of analytical modelling of the UPQC arrangements (Unified Power Quality Conditioner) in d-q rotating coordinates, as well as select results of investigations conducted on the simplified small power laboratory model, were talked over. In short form power balance as well as fundamental dependences and analytical model with regard of decoupling circuits, were investigated. Applied method for DC link capacitance...
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NON-LINE ANALYSIS OF STIFFNESS IN COMPRESSION CONDITIONS
PublicationThe analyzes were aimed at demonstrating the influence of parameters describing the deformation of the structure on the uncertainty of critical force, and the impact of technological imperfections on stress uncertainty in compression conditions. In a linear buckling analysis, the problem is considered only for the initial, permanent state of the stiffness matrix. In the case of demonstrating the influence of initial deformations...
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Digital Photogrammetry in the Analysis of the Ventricles' Shape and Size
PublicationThis article presents spatial analyzes conducted to assess the potential of ReMake software to be used for medical purposes, with emphasis on the analysis of the shape and dimensions of the ventricles. To achieve this goal, the length of the sections measured with the ReMake and Image Master programs have been compared. RMS error was on the level of 1.2 mm. In addition to indicating the appropriateness of using this software, there...
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Costs of upgrading based on 131 railway line
PublicationW poszukiwaniu optymalnego wykorzystania środków finansowych przedsiębiorstwa kolejowego (PKP PLK) oraz czasu planowania napraw torowisk stworzono model trwałości toru. Model w swych założeniach opiera się na parametrach techniczno – eksploatacyjnych linii kolejowej nr 131. W artykule przedstawiono dwa warianty procesu trwałości toru. Pierwszy wariant zakłada oczyszczenie toru, drugi przeprowadzenie modernizacji. Dla obu wariantów...
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La fine di un grande sogno
PublicationIl contributo esamima le cause che portarono alla fine dell'Unione sovietica, i meccanismi per il passaggio all'economia di mercato e il nuovo ruolo dello Stato nell'economia russa T
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Enterprise Gamification - Learning as a Side Effect of Competition
PublicationGmification in companies can be used for driving desired employees behaviour that are advantageous to their development and performance improvement. This paper presents tools acquired from online social networking services and game mechanisms to encourage managers to compete by providing extended statistics and user profiles features in e-learning system.
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The hat problem on cycles on at least nine vertices
PublicationThe topic is the hat problem in which each of n players is randomly fitted with a blue or red hat. Then everybody can try to guess simultaneously his own hat color by looking at the hat colors of the other players. The team wins if at least one player guesses his hat color correctly, and no one guesses his hat color wrong; otherwise the team loses. The aim is to maximize the probability of winning. In this version every player...
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Greenwashing sins - the indicators of ecological marketing immaturity
PublicationThe paper presents the main features of so called "green washing". Unethical aspects of that new phenomena are presented and some corrective actions are proposed by the authors.
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SELECTED ASPECTS OF THE EVALUATION OF THE QUALITY OF GRAPE WINE
PublicationDevelopment of the domestic grape wine market has been presented. The number of grape wine producing entities, acreage, and volume of production over last five years are presented. The composition of red grape wine has been discussed involving health promoting aspects. Two methods of wine quality determination: analytical and sensory meth ods have been described. Physicochemical parameters influencing wine quali ty (acidity, sweetness)...
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Sorption of Chlorinated Solvents on Pine and Oak sawdust
PublicationThe article presents assessment of pine and oak sawdusts as sorbents for removal of chlorinated solvents from water. Sawdusts as potential sorbents were characterized with elemental analysis and BET analyses. Sorption capacity was determined for both pine and oak sawdust towards 1,1,2-trichloroethane, tetrachloroethene and 1,1,1,2-tetrachloroethane. Pine sawdust was able to adsorb greater amounts of chlorinated solvents compared...
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Formation of bubbles from a single nucleation site.
PublicationPrzedstawiono wyniki systematycznych badań eksperymentalnych wrzenia wody destylowanej i metanolu z pojedynczego, sztucznego centrum nukleacji. Jako centra nukleacji służyły otwory wywiercone na czołowej powierzchni miedzianego pręta. Średnice otworów wynosiły: 0.25 mm, 0.60 mm oraz 1.0 mm. Do pomiaru częstotliwości odrywania się pęcherzyków zastosowano układ laser diodowy-fotodioda. Sygnał z fotodiody był rejestrowany za...
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On the size of identifying codes in triangle-free graphs
PublicationIn an undirected graph G, a subset C⊆V(G) such that C is a dominating set of G, and each vertex in V(G) is dominated by a distinct subset of vertices from C, is called an identifying code of G. The concept of identifying codes was introduced by Karpovsky, Chakrabarty and Levitin in 1998. For a given identifiable graph G, let gammaID(G) be the minimum cardinality of an identifying code in G. In this paper, we show that for any connected...
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Access to Side-On Bonded Tungsten Phosphanylphosphinidene Complexes
PublicationMetathesis reactions between diimido complexes of tungsten(VI)[(ArN)2WCl2] (Ar = 2,6-iPr2C6H3) and lithium derivatives of diphosphanes R2P-P(SiMe3)Li (R = tBu and iPr) yield two anionic diimido complexes of tungsten with side-on bonded phosphanylphosphinidene ligands, [(ArN)2WCl(η2-R2P-P)]-. Both complexes are structurally characterized. A possible reaction mechanism and the role of donor solvents are discussed on the basis of...
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Size and effort estimation for application written in Java.
PublicationArtykuł opisuje metodę szacowania rozmiaru i nakładu dla aplikacji wytworzonych w technologii Java. W publikacji przedstawiono cechy charakterystyczne kodu źródłowego w Javie oraz zaproponowano model szacujący rozmiar na podstawie danych volumetrycznych modelu obiektowego.
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Average Size of a Suffix Tree for Markov Sources
PublicationWe study a suffix tree built from a sequence generated by a Markovian source. Such sources are more realistic probabilistic models for text generation, data compression, molecular applications, and so forth. We prove that the average size of such a suffix tree is asymptotically equivalent to the average size of a trie built over n independentsequences from the same Markovian source. This equivalenceis only known for memoryless...
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Digitalization of Building Site Management in the Construction Industry
PublicationWith Industry 4.0, a digital transformation has started in the construction industry. However, 4.0 technologies have difficulties in the integration of digital systems due to the diversity and complexity of the processes in the construction industry. Multidisciplinary work in architectural projects and the need for high productivity require digital renovation planning in the construction industry. The application of the technologies...
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Usługi on-line. Jakość, interakcje, satysfakcja klienta.
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Pomiar on-line zmiennej częstotliwości metodą cyfrową
PublicationW cyfrowym pomiarze częstotliwości on-line dysponujemy informacją o długościach przedziałów międzyimpulsowych poprzedzających chwilę próbkowania. W artykule porównano pomiar częstotliwości na podstawie ostatniego przedziału i metodę wykorzystującą ekstrapolację z dwóch ostatnich przedziałów. Wykonano analizę dla liniowej i sinusoidalnej zmiany częstotliwości. Zaproponowano metodę, w której sposób wyznaczenia częstotliwości zależy...
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Relative Productivity, Country Size and Export Diversification
PublicationThis paper analyses the effects of productivity and country size on the extent of trade structure diversification. Using a testable version of the Ricardian model, we show that relative export variety is an outcome of two forces: a relative productivity change (technological progress) and a relative country size change (labour force growth). The model predictions are validated empirically using product-level trade data for a sample...
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Including the Dark Side of Entrepreneurship in the Entrepreneurship Education
PublicationPursuing an entrepreneurial career is often rewarding in terms of both economic and psychological outcomes. However, becoming an entrepreneur also has its darker side that affects professional and personal life. Meanwhile, the positivity bias is prevalent in entrepreneurial education and research. It is recognized as emphasizing the advantages of becoming an entrepreneur and giving considerably less attention to potential downsides....
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Don't forget the dark side of green transformation
PublicationDesign/methodology/approach – The study is a continuation of the research by Durst and Zieba (2019) related to knowledge risks and their potential outcomes. This present study makes an update on the literature on knowledge risks and green transformation and describes knowledge risks that can be faced in this process. Originality/value – The paper offers new insights for researchers dealing with the topic of knowledge risks in...
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Market Regeneration in Line with Sustainable Urban Development
PublicationThis article presents the study of the optimal design solutions for regeneration of marketplaces. It examines the design variants for the revitalisation of the marketplace, in particular, investment in their modernisation in order to find the most optimal model for transforming these public spaces to have a significant impact on the city’s development. The research is a comparative analysis of the implementation of regeneration...
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Size effect in concrete under splitting tension
PublicationThe size effect is a fundamental phenomenon in concrete materials. It denotes that both the nominal structural strength and material ductility always decrease with increasing element size under tension. In the paper splitting tensile tests on cylindrical concrete specimens with the different diameter were carried out. Two types of the loading strip (plywood board and steel cylinder) were used. The concrete strength and ductility...
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DETERMINING THE TIME CONSTANT USING TWO METHODS AND DEFINING THE THERMOCOUPLE RESPONSE TO SINE EXCITATION OF GAS TEMPERATURE
PublicationThis paper describes the two methods of determining the time constant of type K thermocouple, for two construction solutions: the exposed weld and the mantle fillet weld. This is an important parameter indicating the response time of the thermocouple on the recorded signal. The first method consists of determining the value of τ in the way of numerical simulation of heat exchange between the thermocouple and the current of gas...
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Proteomic Analysis of Proton Beam Irradiated Human Melanoma Cells
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Molecular Determinants of Proton Transfer in ATP Synthase FO Complex
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Dosimetric evaluation of a novel polymer gel dosimeter for proton therapy
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Proton hydration in aqueous solution: FTIR studies of HDO spectra
PublicationW artykule scharakteryzowano sfery hydratacyjne protonu w roztworze wodnym na podstawie pomiarów widm FTIR wody półciężkiej (HDO), rozcieńczonej izotopowo w H2O. Wyniki eksperymentalne skonfrontowano z obliczonymi metodami chemii kwantowej strukturami niewielkich klasterów wodnych typu H+(H2O)n. Otrzymane geometrie optymalne porównano z odległościami międzyatomowymi otrzymanymi na podstawie położeń pasm HDO. Pierwsza sfera hydratacyjna...
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Thermal and Chemical Expansion in Proton Ceramic Electrolytes and Compatible Electrodes
PublicationThis review paper focuses on the phenomenon of thermochemical expansion of two specific categories of conducting ceramics: Proton Conducting Ceramics (PCC) and Mixed Ionic-Electronic Conductors (MIEC). The theory of thermal expansion of ceramics is underlined from microscopic to macroscopic points of view while the chemical expansion is explained based on crystallography and defect chemistry. Modelling methods are used to predict...
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Dynamic characteristics of the proton exchange membrane fuel cell module
PublicationThe paper describes a fuel cell based system and its performance. The system is based on two fuel cell units, DC/DC converter, DC/AC inverter, microprocessor control unit, load unit, bottled hydrogen supply system and a set of measurement instruments. In the study presented in the paper a dynamic response of the proton exchange membrane (PEM) fuel cell system to unit step change load as well as to periodical load changing cycles...
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Molecular modelling of membrane sterols with the use of the GROMOS 96 forcefield
PublicationPodstawowym zadaniem tego projektu było udowodnienie zasadności stosowania pola siłowego GROMOS 96 do symulacji steroli błonowych metodą dynamiki molekularnej. Uzyskane wyniki jasno wskazują, że to pole siłowe bardzo dobrze nadaje się do symulacji silnie lipofilowych układów.
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Projekt und Realisierung eines groBen Stahlbehalters fur Erdol.
PublicationOmówiono projekt i budowę zbiornika stalowego o pojemności 75 000 m3. Zbiornik jest dwupłaszczowy i ma podwójne dno w celu zabezpieczenia środowiska naturalnego przed skażeniem awaryjnym wyciekami ropy naftowej. Zwrócono uwagę na nowatorskie rozwiązania konstrukcyjne.
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Proton Conducting Ceramic Powder Synthesis by a Low Temperature Method
PublicationMolten salt synthesis (MSS) is a simple method for the preparation of ceramic powders with specific morphology. The main role of the molten salts is to increase the reaction rate and lower the reaction temperature. It occurs because of much higher mobility of reactants in the liquid medium than in the solid state. In this work the molten salt synthesis was applied to produce ceramic powders of La0995Ca0005NbO4 and BaCe09−xZrxY01O3....
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Novel Class of Proton Conducting Materials—High Entropy Oxides
PublicationHere, for the first time, we present data on proton conductivity of high-entropy, single-phase perovskites. The BaZr0.2Sn0.2Ti0.2Hf0.2Ce0.2O3−δ, BaZr0.2Sn0.2Ti0.2Hf0.2Y0.2O3−δ, BaZr1/7Sn1/7Ti1/7Hf1/7Ce1/7Nb1/7Y1/7O3−δ, and BaZr0.15Sn0.15Ti0.15Hf0.15Ce0.15Nb0.15Y0.10O3−δ single-phase perovskites were synthesized. Before electrical measurements, materials were characterized using X-ray diffraction (XRD), scanning electron microscopy...
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