Browsing Moksliniai ir apžvalginiai straipsniai / Research and Review Articles by Faculty "Fundamentinių mokslų fakultetas / Faculty of Fundamental Sciences"
Now showing items 1-20 of 2846
-
0 методике итоговой оценки знаний и навиков студентов по начертательной геометрии
(Инженерная и компьютерная графика: сборник научных статей, 1992) -
137 Cs IR 40K pasiskirstymo dirvožemyje po medžio laja įvertinimas
(Sveikatos mokslai : visuomenės sveikata, medicina, slauga, 2003)Straipsnyje analizuojama vertikalioji ir horizontalioji 137Cs ir 40K migracija dirvožemyje po medžių lajomis. Dirvožemio bandiniai tyrimui paimti iš skirtingų, labiausiai užterštų Lietuvos regionų. Lietuvos pajūrio Klaipėdos ... -
137-Cs radionuklido tūrinio aktyvumo pokyčiai Baltijos jūros Lietuvos priekrantėjė 2004 m
(Sveikatos mokslai : visuomenės sveikata, medicina, slauga, 2005)2004 m. vasaros-rudens laikotarpiu atlikti 137Cs radionuklido tūrinio aktyvumo (TA) tyrimai Baltijos jūros priekrantėje ties Juodkrante. Bandiniai imti trimis etapais. Nustatyta minimali ir maksimali TA reikšmės per šį ... -
137Cs and 90Sr behavioural regularities in the southeastern part of the Baltic Sea
(Journal of Environmental Radioactivity, 2001)Variations in 137Cs concentrations were investigated over the period 1986-1997 in the southeastern part of the Baltic Sea, following the Chernobyl power plant accident. The rate of "self-cleaning" was demontsrated to be ... -
137Cs contamination and its vertical distribution in the Curonian Spit soil
(Journal of environmental engineering and landscape management, 2005)In 2003–2004 soil depthprofile sampling was carried out at Juodkrantė in the Curonian Spit. The activity concentrations of anthropogenic radionuclide 137Cs in soil samples from the terrestrial and coastal environment of ... -
137Cs in Lake Tapeliai, Lithuania
(Lithuanian journal of physics, 2012)The results of an integrated study of the radiocesium behaviour in Lake Tapeliai by using not only conventional data on radiocesium activity concentrations in lake water and sediments but also a complex data set on seasonal ... -
137Cs ir 90Sr radionuklidų tūrinio aktyvumo pokyčių Baltijos ir Juodosios jūros vandenyse palyginamoji analizė
(Žmogaus ir gamtos sauga 2022: mokslo straipsnių rinkinys = Human and nature safety 2022: selected papers, 2022)Jūrinės aplinkos taršos įvertinimas ypač svarbus gamtosauginiu aspektu. Ypatingas dėmesys skiriamas uždarų jūrų būklei. Baltijos ir Juodoji jūros yra vienos labiausiai užterštų jūrų įvairios kilmės teršalais, įskaitant ir ... -
2-DOF small-size piezoelectric locomotion platform with the unlimited motion range
(Micromachines, 2021)This paper presents numerical and experimental investigations of a small size piezoelectric locomotion platform that provides unlimited planar motion. The platform consists of three piezoelectric bimorph plates attached ... -
3D cellular spheroids as tools for understanding carboxylated quantum dot behavior in tumors
(Biochimica et biophysica acta : general subjects, 2018)Monolayer cell cultures have been considered the most suitable technique for in vivo cellular experiments. However, a lot of cellular functions and responses that are present in natural tissues are lost in two-dimensional ... -
3DOF ultrasonic motor with two piezoelectric rings
(Sensors, 2020)A novel design of a multiple degrees of freedom (multi-DOF) piezoelectric ultrasonic motor (USM) is presented in the paper. The main idea of the motor design is to combine the magnetic sphere type rotor and two oppositely ... -
5-DOF cone-shaped piezoelectric positioning robot for optical systems
(Sensors and actuators A: Physical, 2023)The paper presents a numerical and experimental investigation of a 5-DOF piezoelectric robot that is used for angular and planar positioning of optical devices and systems. The robot has a simple design and consists of an ... -
80-dB microwave noise from an avalanche transistor circuit
(Elektronika ir elektrotechnika, 2015)Extremely high ‘excess noise ratio’ of 80 dB is observed from an avalanche transistor circuit, operating in a random pulse mode. Broadband noise spectrum measured from 30 MHz to 1 GHz exhibits good flatness with the ... -
A "converse'' stability condition is necessary for a compact higher order scheme on non-uniform meshes for the time-dependent Schrödinger equation
(Applied mathematics letters, 2018)The stability bounds and error estimates for a compact higher order Numerov-Crank-Nicolson scheme on non-uniform spatial meshes for the 1D time-dependent Schrödinger equation have been recently derived. This analysis has ... -
A bibliometric data analysis of multi-criteria decision making methods in heritage buildings
(Journal of civil engineering and management, 2019)Numerous countries are trying to find the best solution for conservation, restoration or reuse of the heritage buildings, preserving their cultural, historical, ethnic and spiritual values. The scientists, researchers and ... -
A biochar-based medium in the biofiltration system: removal efficiency, microorganism propagation and the medium penetration modelling
(Journal of the air & waste management association, 2016)Four strains of microorganisms (including micromycetes Aspergillus versicolor BF-4 and Cladosporium herbarum 7KA, as well as yeast Exophiala sp.BF1 and bacterium Bacillus subtilis B20) were selected. At the inlet loading ... -
A case study on the assessment of chemical and physical pollution levels during the copying process
(Sustainability: Job Design for Human and Organisational Sustainability in the Context of Emerging Technologies, 2022)In accordance with sustainable development goals (SDG’s), urgent action should be taken to make the societal and natural environments better for human beings. People spend most of their time indoors, therefore growing ... -
A character-based part-of-speech tagger with feedforward neural networks
(Romanian journal of information science and technology, 2018)This article presents a simple method to perform part-of-speech (POS) tagging with feedforward neural networks applied to learnable character embeddings. The motivation of the research is based on the fact that for some ... -
A characterization of the dynamics of Newton’s derivative
(Mathematical methods in engineering. Part 5 : Springer, 2007, 2007)In the present report the dynamic behaviour of the one dimensional family of maps [...] is examined, for different ranges of the control parametres a, b and c. These maps are of special interest, since they are solutions ... -
A combined approach for multi-label text data classification
(Computational intelligence and neuroscience, 2022)Automated data analysis solutions are very dependent on data and its quality. The possibility of assigning more than one class to the same data item is one of the specificities that need to be taken into account. There are ... -
A compact higher-order finite-difference scheme for the wave equation can be strongly non-dissipative on non-uniform meshes
(Applied mathematics letters, 2021)We study necessary conditions for stability of a Numerov-type compact higher-order finite-difference scheme for the 1D homogeneous wave equation in the case of non-uniform spatial meshes. We first show that the uniform in ...