Browsing B6 – LU institūti un aģentūras / Institutes and agencies of the UL by Title
Now showing items 605-624 of 1027
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Nitrogen adsorption on graphene sponges synthesized by annealing a mixture of nickel and carbon powders
(De Gruyter Open Ltd, 2017)Adsorption by graphene sponge (GS) manufactured by annealing nickel-carbon powder mixture in inert atmosphere has been studied. By determining the specific surface area (SSA) for the GS sample, it has been found that ... -
Nitrogen interstitial defects in silicon. A quantum mechanical investigation of the structural, electronic and vibrational properties
(Elsevier B.V., 2019)The vibrational features of eight interstitial nitrogen related defects in silicon have been investigated at the first principles quantum mechanical level by using a periodic supercell approach, a hybrid functionals, an ... -
Nitrogen substitutional defects in silicon. A quantum mechanical investigation of the structural, electronic and vibrational properties
(Royal Society of Chemistry, 2019)The vibrational infrared (IR) and Raman spectra of seven substitutional defects in bulk silicon are computed, by using the quantum mechanical CRYSTAL code, the supercell scheme, an all electron Gaussian type basis set and ... -
Non-contact breath sampling for sensor-based breath analysis
(IOP Publisher, 2019)Breath analysis holds great promise for real-time and non-invasive medical diagnosis. Thus, there is a considerable need for simple-in-use and portable analyzers for rapid detection of breath indicators for different ... -
Non-Enzymatic Co3O4 Nanostructure-Based Electrochemical Sensor for H2O2 Detection
(Sciendo, 2023)This article describes the synthesis of nanostructured cobalt oxide on iron wires and its application for the detection of hydrogen peroxide as working electrode for non-enzymatic electrochemical sensor. Cobalt oxide was ... -
A non-enzymatic electrochemical hydrogen peroxide sensor based on copper oxide nanostructures
(Beilstein-Institut, 2022)This article describes the synthesis of nanostructured copper oxide on copper wires and its application for the detection of hydrogen peroxide. Copper oxide petal nanostructures were obtained by a one-step hydrothermal ... -
Nonlinear absorption and refraction of picosecond and femtosecond pulses in HgTe quantum dot films
(Multidisciplinary Digital Publishing Institute (MDPI), 2021)We report measurements of the saturated intensities, saturable absorption, and nonlinear refraction in 70-nm thick films containing 4 nm HgTe quantum dots. We demonstrate strong nonlinear refraction and saturable absorption ... -
Nonlinear Spectra: the Neumann Problem
(Vilnius Gediminas Technical University, 2009) -
Nostādnes un pasākumi kritiskās domāšanas, medijpratības un spriestspējas jomā
(LU Filozofijas un socioloģijas institūts, 2018)Pēdējos gados Eiropas Savienībā, arī Latvijā, arvien aktuālāka kļūst nepatiesas informācijas un viltus ziņu straujā izplatība, kuras rezultātā notiek cilvēku dezinformācija, manipulēšana ar prātiem un noskaņojumiem. Viens ... -
Notes in the graph theory. A manuscript (with flower snark J5)
(2013-12-13)This fragment of manuscripts, written in Latvian, is taken from a hardcover notebook of E.Grinbergs. The date when these notes started 29.7.72 is clearly seen on the first page, on the page 7 the date is 31.8.72, on 10th ... -
Novel method of phosphorescent strontium aluminate coating preparation on aluminum
(Elsevier Ltd, 2018)This study presents a novel approach to produce phosphorescent coatings on metal surfaces. Strontium aluminates are the most popular modern phosphorescent materials exhibiting long afterglow at room temperature and a broad ... -
Novel octahedral tilt system a + b + c + in (1 − x)Na0.5Bi0.5TiO3–xCdTiO3 solid solutions
(Springer Verlag, 2017)(1 − x)Na0.5Bi0.5TiO3–xCdTiO3 solid solutions in the whole concentration range (0.0 ≤ x ≤ 1.0) were studied by means of X-ray diffraction, dielectric spectroscopy and polarization measurements. The study was mainly focused ... -
Novērotāju piezīmes, kas apjoma dēļ nav ievietotas tieši digitalizētajos žurnālos
(2022)Mezosfēras mākoņu novērojumos sastopamas novērotāju piezīmes, kas sava apjoma dēļ nav ievietojamas žurnāla failā. Vairākos gadījumos novērotāji žurnālos ir arī pievienojuši grafiskas skices. Attiecīgās piezīmes tāpēc ... -
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
(Elsevier, 2021)The development of nanoscale X-ray sensors is of crucial importance to achieve higher spatial resolution in many X-ray-based techniques playing a key role in materials science, healthcare, and security. Here, we demonstrate ... -
NV microscopy of thermally controlled stresses caused by thin Cr2O3 films
(Optica Publishing Group, 2023)Many modern applications, including quantum computing and quantum sensing, use substrate-film interfaces. Particularly, thin films of chromium or titanium and their oxides are commonly used to bind various structures, such ... -
Octahedral Tilting in Homologous Perovskite Series CaMoO3-SrMoO3-BaMoO3 Probed by Temperature-Dependent EXAFS Spectroscopy
(MDPI, 2022)Local distortions in perovskites can be induced by cation displacements and/or by the tilting and rotating of cation–anion octahedra. Both phenomena have been subject to intense investigations over many years. However, ... -
ODS ferritic steels obtained from gas atomized powders through the STARS processing route: Reactive synthesis as an alternative to mechanical alloying
(Elsevier Ltd, 2018)Oxide Dispersion Strengthened Ferritic Stainless Steels (ODS FS) are candidate materials for structural components in fusion reactors. Their ultrafine microstructure and the presence of a very stable dispersion of Y-Ti-O ... -
On building 4-critical plane and projective plane multiwheels from odd wheels
(2013-01-31)We build unbounded classes of plane and projective plane multiwheels that are 4-critical that are received summing odd wheels as edge sums modulo two. These classes can be considered as ascending from a single common graph ... -
On computation in the limit by non-deterministic Turing machines
(Latvia State University, 1974)