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Wyniki wyszukiwania dla: OPTIMAL PORTFOLIO
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Decisional DNA and Optimization Problem
PublikacjaMany researchers have proved that Decisional DNA (DDNA) and Set of Experience Knowledge Structure (SOEKS or SOE) is a technology capable of gathering information and converting it into knowledge to help decision-makers to make precise decisions in many ways. These techniques have a feature to combine with different tools, such as data mining techniques and web crawlers, helping organization collect information from different sources...
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Robustness of quantum-randomness expansion protocols in the presence of noise
PublikacjaIn this paper we investigate properties of several randomness generation protocols in the device independent framework. Using Bell-type inequalities it is possible to certify that the numbers generated by an untrusted device are indeed random. We present a selection of certificates which guarantee two bits of randomness for each run of the experiment in the noiseless case and require the parties to share a maximally entangled state....
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Optymalizacja strategii sieci inteligentnych agentów za pomocą programowania genetycznego w systemie rozproszonym realizującym paradygmat volunteer computing
PublikacjaDynamicznie rosnąca złożoność i wymagania w odniesieniu do rozproszonych systemów informatycznych utrudnia zarządzanie dostępnymi zasobami sprzętowymi i programistycznymi. Z tego powodu celem rozprawy jest opracowanie wielokryterialnej metody programowania genetycznego, która pozwala na optymalizację strategii zespołu inteligentnych agentów programistycznych w zakresie zarządzania systemem realizującym paradygmat volunteer computing....
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Metal enhanced fluorescence of flavin mononucleotide using new plasmonic platform
PublikacjaNew plasmonic platform was successfully obtained to investigate the increase of fluorescence intensity of a fluorophore in the presence of silver nanoparticles. A flavin mononucleotide, was selected by us as a fluorophore for this study as a very important biological compound playing a key role in many biochemical process. Plasmonic platforms were characterized by means of luminescence spectroscopy. Flavin mononucleotide deposited...
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Excitation energy transfer in partly ordered polymer films differing in donor and acceptor transition moments orientation
PublikacjaBased on spectroscopic measurements selected properties of nonradiative Förster energy transport are studied in uniaxially stretched polyvinyl alcohol thin films for three systems differing in donor and acceptor transition moments orientation relative to the axis of stretching. In particular, donor – acceptor emission anisotropy spectra yield completely different regularities for these systems in uniaxially stretched films, whereas...
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Thickness and structure change of titanium (IV) oxide thin films synthesized by the sol–gel spin coating method
PublikacjaTitanium dioxide is a well-known material in nanotechnology, while it provides new opportunities due to its interesting properties, for example, as a semiconductor with a quite significant forbidden band gap energy of 3.2 eV. In this study, thin films of titanium dioxide (TiO2) were synthesized in amorphous and crystallographic systems using the sol–gel process. Atomic Force Microscopy (AFM), Raman spectroscopy and X-ray diffraction...
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Determination of refractive index dispersion using fiber-optic low-coherence Fabry–Perot interferometer: implementation and validation
PublikacjaWe present the implementation and validation of low-coherence Fabry–Perot interferometer for refractive index dispersion measurements of liquids. A measurement system has been created with the use of four superluminescent diodes with different optical parameters, a fiber-optic coupler and an optical spectrum analyzer. The Fabry–Perot interferometer cavity has been formed by the fiber-optic end and mirror surfaces mounted on a micromechanical...
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Aggregation of Rhodamine 6G in titanium dioxide nanolayers and bulk xerogels
PublikacjaNanolayers and bulk xerogels of Rhodamine 6G (Rh6G) in titanium dioxide (Rh6G/TiO2) were prepared using the sol–gel method. The spectroscopic and structural properties of these two types of hybrid matrices were studied as a function of dye concentration. In both cases absorption, fluorescence and time resolved emission spectra show the formation of fluorescent aggregates. The observed stronger changes in characteristics of bulk...
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Luminescent properties of undoped and Ce3+ doped crystals in Y2O3 Lu2O3 Al2O3 triple oxide system grown by micro-pulling-down method
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Luminescent properties of LiF crystals for fluorescent imaging of nuclear particles tracks
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Intrinsic and defect-related luminescence of YAlO3 and LuAlO3 single crystals and films
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Luminescent properties of YAlO3:Mn single crystalline films
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Poly(amic acid)s vs. polyimides with π-conjugated –N N- units: Cis-trans isomerization reaction and kinetics of thermal imidization
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Photo-acoustic response of active biological systems
PublikacjaZbadano dwie próbki organiczne gatunku Trunculariopsis trunculus,jedną wilgotną, drugą - suchą. W obu przypadkach zaobserwowanointensywne szerokie pasma absorpcyjne w zakresie widzialnym (żółtymi poniżej 330 nm). Widma foto-akustyczne zawierają wszystkie pasma uznane za związane z aktywnością biologiczną.
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An EXAFS study of the local structure of rare-earth luminescence centres in the Ca3Ga2Ge3O12 glass
PublikacjaW pracy przedstawiono wyniki analizy EXAFS danych mierzonych na krawędzi L3 atomów ziem rzadkich takich jak Eu, Ho (0.7 wt.%) oraz Er (1.46 wt.%), którymi domieszkowano szkło 3CaO-Ga2O3-3GeO2. Otrzymane parametry strukturalne opisujące pierwszą powłokę koordynacyjną badanych atomów wskazują, że ich lokalne otoczenie tlenkowe jest jednakowe (niezależne od typu jonu ziemi rzadkiej) i uwzględniając strukturalny nieporządek bardzo...
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High pressure effect on charge transfer transition in Y2O2S:Eu3+
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Intensification of luminescence of Europium-EDTA complex in polyvinyl pyrrolidone films by copper nanoparticles
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Influence of high pressure on Sr2SiO4:Eu2+ luminescence
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High pressure luminescence and time resolved spectra of La2Be2O5:Pr3+
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Tb3+ ions in the presence of ZnS:Mn2+ nanocrystals incorporated into silica: Tb3+ and Mn2+ luminescence kinetics
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Luminescent GeO2–Pb–Bi2O3 glasses co-doped with Tb3+1 and Eu3+: Excitation energy transfer and color chromaticity
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High pressure and time resolved luminescence spectra of Gd3Ga5O12:Pr3+ crystal
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Sol–gel glasses with enhanced luminescence of laser dye Rhodamine B due to plasmonic coupling by copper nanoparticles
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Binding energies of Eu2+ and Eu3+ ions in β-Ca2SiO4 doped with europium
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Pressure effects on the luminescence properties of CaWO4:Pr3+
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3 d 3 system – Comparison of Mn 4+ and Cr 3+ in different lattices
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Pressure-induced luminescence quenching in KY(WO 4 ) 2 :Pr 3+
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Low and high field sites of Cr3+ ions in calcium tetraborate glasses
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Preface
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Corrigendum to “Binding energies of Eu2+ and Eu3+ ions in β-Ca2SiO4 doped with europium” [Opt. Mater. 35 (2013) 2107–2114]
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Low temperature luminescence of KMgF3:Eu2+ crystal
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New Pr3+ site in β-SiAlON red phosphor
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Thickness and structure change of titanium(IV) oxide thin films synthesized by the sol–gel spin coating method
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Synthesis and luminescence characteristics of Dy3+ ions in silica xerogels doped with Ln2−xDyx(WO4)3
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KMgF3:Eu2+ as a new fluorescence-based pressure sensor for diamond anvil cell experiments
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Spectroscopic properties of the Ce-doped borate glasses
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Spectroscopic properties and energy level location of Eu2+ in Sr2Si5N8 phosphor
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Influence of charge transfer state on Eu 3+ luminescence in LaAlO 3 , by high pressure spectroscopy
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Excitation energy transfer in partly ordered polymer films differing in donor and acceptor transition moments orientation
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A facile method for Tauc exponent and corresponding electronic transitions determination in semiconductors directly from UV–Vis spectroscopy data
PublikacjaIn this work, a facile method allowing for estimation of the exponent in the Tauc equation directly from the UV–vis spectra is presented. It is based on the Taylor expansion of the logarithmic version of the Tauc equation. The Tauc exponent is calculated from the tangent slope of the absorption data. Knowledge of this coefficient provides information about the optical transition types and is used as an input for the calculations...
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Y2O3:Eu nanocrystals as biomarkers prepared by a microwave hydrothermal method
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Luminescent properties of ZrO2:Tb nanoparticles for applications in neuroscience
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Luminescence enhancement in nanocrystalline Eu2O3 nanorods – Microwave hydrothermal crystallization and thermal degradation of cubic phase
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Enhancement of second harmonic generation in nanocrystalline SiC films based natural microcavities
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Laser stimulated third harmonic generation studies in ZnO–Ta 2 O 5 –B 2 O 3 glass ceramics entrenched with Zn 3 Ta 2 O 8 crystal phases
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Enhanced sunlight photo-catalytic performances of ZnO/ZnNb2O6/Nb2O5 composites for organic pollutant degradation
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Third harmonic generation studies of 1.06 μm Nd:YAG laser beam in Li2SO4–MgO–P2O5 glass system-influence of CuO
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The anisotropic photorefractive effect in lithium sulfo-phosphate glass system doped with nickel ions
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Luminescent properties of Ln3+ doped tellurite glasses containing AlF3
PublikacjaThe low-phonon energy tellurite glasses TeO2-BaO-Bi2O3 and TeO2-BaO-Bi2O3-AlF3 triply doped with Eu3+, Tb3+, Tm3+ ions in two different molar ratios were synthesized using melt-quenching technique. Their structure and luminescence properties were widely investigated by X-ray Diffraction (XRD), Differential Scanning Calorimetry (DSC), Fourier Transform Infrared Spectroscopy (FTIR) and Photoluminescence Spectroscopy (PL). The luminescence...
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New plasmonic platform for enhanced luminescence of Valrubicin
PublikacjaLuminescence enhanced by new structure of plasmonic platform with aluminum oxide (Al2O3) buffer layer deposited on gold nanostructures is investigated. Regularly distributed gold nanostructures of average dimension of 50 nm formed the active part of plasmonic platforms. They were manufactured on Corning 1737 glass substrate by melting of gold thin film. The nanostructures were coated by dielectric Al2O3 thin film with thickness...