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Search results for: ELECTRON
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Effective kernel‐principal component analysis based approach for wisconsin breast cancer diagnosis
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Photoconduction and magnetic field effect on photoconduction in hole-transporting star-burst amine (m-MTDATA) films
PublicationPhotoconduction and magnetic field effect on photoconduction have been investigated as a function of electric field strength, excitation light intensity and wavelength in vacuum evaporated films of m-MTDATA (4,4′,4″-tris(N-(3-methylphenyl)-N-phenylylamino) triphenylamine), the starburst amine commonly used as hole-transporting material in organic light-emitting diodes. The photocurrent is found to be generated by the singlet exciton...
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Compact 4 × 4 butler matrix with non‐standard phase differences for IoT applications
PublicationButler matrices represent a popular class of feeding networks for antenna arrays. Large dimensions and the lack of flexibility in terms of achievable output phase difference make conventional Butler structures of limited use for modern communication devices. In this work, a compact planar 4 × 4 matrix with non-standard relative phase shifts of –30º, 150º, –120º, and 60º has been proposed. The structure is designed to operate at...
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Efficiency limit of excitonic photovoltaic cells under phosphor-based white LED illumination
PublicationThe limit of energy conversion of excitonic photovoltaic cells working under white light illumination generated by phosphor-based LED is analysed using the modified Giebink approach. Particularly, the impact of the optical energy gap and energy loss associated with the excitons dissociation at the heterojunction interface on power conversion efficiency of the device are discussed. From the results of our study it follows that the...
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Dual-band antenna with improved gain for WLAN and ISM applications
PublicationIn this Letter, a dual-band antenna with an improved gain is proposed. The structure features 9.7 and 10.4 dBi gain within 2.4 GHz to 2.5 GHz and 5 GHz to 6 GHz bands, respectively. This makes it suitable for WLAN and ISM applications. The structure comprises an asymmetrical pair of radiators and slots suspended over a reflector. The antenna is optimised in a two-stage process using a trust-region-based gradient search algorithm....
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Non-isolated resonant quasi-Z-source network DC–DC converter
PublicationA novel non-isolated resonant quasi-impedance (quasi-Z)-source network DC–DC converter is proposed. The resonant impedance source network is derived from the quasi-Z-source network by including the autotransformer-based resonant cell instead of the second inductor of the quasi-Z-network. The leakage inductance of the autotransformer and two resonant capacitors connected in series with the autotransformer windings constitute a high-frequency...
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InGaN trapered laser diodes
PublicationW pracy zaprezentowano rezultaty badan nad diodami laserowymi InGaN ze zwężającym się kanałem. Kąty kanałów zmieniane były w zakresie 2 -5 stopni, jak również zmieniana była długość kanału. Wykazano, że w przypadku optymalnych parametrów, parametr M2 (M kwadrat) opisujący odtępstwa wiązki od krzywej Gaussa, wynosił 2.1 przy mocy optycznej 200 mW.
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Photoconduction in the archetype organic hole transporting material TPD
PublicationW pracy przedstawiono charakterystykę fotoprzewodnictwa w zależności od przyłożonego pola elektrycznego, długości fali i natężenia światła wzbudzającego molekuły pochodnej diaminy (TPD)wykorzystywanej powszechnie jako organiczny przewodnik dziurowy w organicznych diodach elektroluminescencyjnych. Układy z pojedynczą warstwą TPD, kwarc/ITO/TPD/Al i kwarc/Al/TPD/Al, zostały wzbudzane od strony podłoża kwarcowego. Przy długościach...
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Injection of charge into the archetype organics hole transporting material TPD at the electrical contacts with ITO and Al
PublicationW pracy zaprezentowano dokładną analizę charakterystyk polowo-prądowych jednowarstwowych układów kwarc/ITO/TPD/Al oraz kwarc/Al1/TPD/Al2, zawierających próżniowo naparowane warstwy pochodnej diaminy (TPD) używane powszechnie jako materiał przewodzący dziury w organicznych diodach elektroluminescencyjnych. Prądy są zdominowane przez iniekcję dziur niezależnie od polaryzacji kontaktów elektrycznych. Oprócz oczywistej asymetrii w...
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Photoconduction in the archetype organic hole transporting material TPD
PublicationW pracy opisano mechanizm fotoprzewodnictwa w układzie ITO/warstwa TPD/Al oraz Al/warstwa TPD/Al, gdzie TPD oznacza dwaminę powszechne stosowaną jako transporter dziur w organicznych diodach EL.
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Injection of charge into the archetype organic hole transporting material TPD at the electrical contacts with ITO and Al
PublicationW pracy opisano mechanizm przewodnictwa ciemnego w układzie ITO/warstwa TPD/Al oraz Al/warstwa TPD/Al, gdzie TPD oznacza dwaminę powszechne stosowaną jako transporter dziur w organicznych diodach EL.
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Design of quarter-wave compact impedance transformers using coupled transmission lines
PublicationPrzedstawiono porównanie wyników symulacji jedno i wielosekcyjnych transformatorów impedancji budowanych w postaci struktur wykorzystujących idealnenie sprzężone linie transmisyjne, idealne sprzężone symetryczne linie transmisyjne oraz rzeczywiste sprzężone linie mikropaskowe. Pokazano, że możliwa jest konstrukcja transformatorów impedancji o bardzo dobrych parametrach technicznych wykorzystująca sprzężone linie mikropaskowe, pomimo...
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Ordered multicast protocol based on credited virtual acknowledgment
PublicationPrzedstawiono protokół rozgłaszania dla sieci pakietowych oparty na statystycznym przewidywaniu ruchu aplikacji. Pokazano, że wydajność protokołu zbliżona jest do optymalnej w klasie wykorzystującej potwierdzenia wirtualne.
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Discrete Green's function approach to disjoint domain simulations in 3D FDTD method
PublicationA discrete Green’s function (DGF) approach to couple 3D FDTD subdomains is developed. The total-field/scattered-field subdomains are simulated using the explicit FDTD method whilst interaction between them is computed as a convolution of the DGF with equivalent current sources measured over Huygens surfaces. In the developed method, the DGF waveforms are truncated using the Hann’s window. The error varies in the range -65 to -40...
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Cholinesterase inhibitory activity, antioxidative potential and microbial stability of innovative liver pâté fortified with rosemary extract (Rosmarinus officinalis)
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Regionalne obserwatorium kultury w wojewwdztwie podlaskim - uwarunkowania i planowane kierunki rozwoju (Regional Cultural Observatory in the Podlaskie Voivodeship - Conditions and Development Trends)
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SIE Country Summary: Poland
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Impact of Cultural Differences on Knowledge Transfer in British, Hungarian and Polish Enterprises
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Taksonomia funkcjonalnych kompetencji cyfrowych oraz metodologia pomiaru poziomu funkcjonalnych kompetencji cyfrowych ossb z pokolenia 50 plus (Taxonomy of Functional Digital Skills and Methodology for Measuring the Functional Level of Digital Literacy of People Aged 50 plus)
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SIE Country Summary: Polska (SIE Country Summary: Poland)
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Poles Social Capital and Socio-Economic Development
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Second Life - Problems with the Prolongation of Reality
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Global Product as a Result of Globalization Process
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Support for Business Succession in the European Union
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Regional Labour Market and Tourist Enterprises in Malopolska
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Impact of the Regional Business Environment on the Development of Small and Medium-Sized Enterprises in Southern Poland
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Small and Medium-Sized Enterprises in Poland
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Regional Context of Small and Medium-Sized Enterprises’ Development: Case Study of Southern Poland
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Entrepreneurship as the Challenge for Polish Economy in the 21st Century
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Managerial Perception of Regional Small Business Environment in Southern Poland
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Influence of the European Enlargement Process on Entrepreneurship in Poland
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Foreign Trade Changes in Poland and Slovakia as an Effect of Europeanization before and after the Accession
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Comparative Analysis of Working Conditions in the European Union Member States
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Impact of the Accession to the European Union on Polish Enterprises Development
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Structure and thermoelectric properties of Te/Ag/Ge/Sb (TAGS) materials obtained by reduction of melted oxide substrates
PublicationThe Ge0.77Ag0.1Sb0.13Te1alloy was fabricated by a novel two step route. For that purpose firstly the oxide reagents were melted at high temperature and quenched into pellets. After that pellets were milled to the powder and then reduced in hydrogen at various temperatures and for various periods of time. Energy dispersive X-ray analysis indicated the possibility of successful fabrication of stoichiometric thermoelectric materials...
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On Symmetry of Uniform and Preferential Attachment Graphs
PublicationMotivated by the problem of graph structure compression under realistic source models, we study the symmetry behavior of preferential and uniform attachment graphs. These are two dynamic models of network growth in which new nodes attach to a constant number m of existing ones according to some attachment scheme. We prove symmetry results for m=1 and 2 , and we conjecture that for m≥3 , both models yield asymmetry with high...
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A construction for the hat problem on a directed graph
PublicationA team of n players plays the following game. After a strategy session, each player is randomly fitted with a blue or red hat. Then, without further communication, everybody can try to guess simultaneously his own hat color by looking at the hat colors of the other players. Visibility is defined by a directed graph; that is, vertices correspond to players, and a player can see each player to whom he is connected by an arc. The...
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On a Recurrence Arising in Graph Compression
PublicationIn a recently proposed graphical compression algorithm by Choi and Szpankowski (2012), the following tree arose in the course of the analysis. The root contains n balls that are consequently distributed between two subtrees according to a simple rule: In each step, all balls independently move down to the left subtree (say with probability p) or the right subtree (with probability 1p). A new node is created as long as...
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Nitrogen/Oxygen Enriched Hierarchical Porous Carbons Derived from Waste Peanut Shells Boosting Performance of Supercapacitors
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Generational Differences, Generations of Western Society, Managing Multiple Generations in the Workplace
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Trans Theorizing
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Bronislaw Malinowski
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Cultural Capital
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Public Policy: Ethics
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Tocilizumab Improves the Prognosis of COVID-19 in Patients with High IL-6
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The Silver Economy as a Constructive Response in Public Policy on Aging
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Room‐Temperature Multiferroicity and Magnetization Dynamics in Fe/BTO/LSMO Tunnel Junction
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Decision Making Methods for the Selection of ICT Project Manager
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An efficient method of Yarrowia lipolytica immobilization using oil- and emulsion-modified bacterial cellulose carriers
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On-line Ramsey Numbers of Paths and Cycles
PublicationConsider a game played on the edge set of the infinite clique by two players, Builder and Painter. In each round, Builder chooses an edge and Painter colours it red or blue. Builder wins by creating either a red copy of $G$ or a blue copy of $H$ for some fixed graphs $G$ and $H$. The minimum number of rounds within which Builder can win, assuming both players play perfectly, is the \emph{on-line Ramsey number} $\tilde{r}(G,H)$. In...