Browsing Moksliniai ir apžvalginiai straipsniai / Research and Review Articles by Type "Straipsnis Web of Science DB / Article in Web of Science DB"
Now showing items 1-20 of 6623
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0.13 μm CMOS traveling-wave power amplifier with on- and off-chip gate-line termination
(Electronics, 2020)Broadband amplifiers are essential building blocks used in high data rate wireless, radar, and instrumentation systems, as well as in optical communication systems. Only a traveling-wave amplifier (TWA) provides sufficient ... -
0.18 μm CMOS power amplifier architecture comparison for a wideband Doherty configuration
(Informacije MIDEM - Journal of Microelectronics, Electronic Components and Materials, 2016)This paper presents a comparison between a classical and a self-biased two stage CMOS power amplifier (PA) suitable for a wideband Doherty (DPA) configuration. Both PAs are fully differential and have been implemented in ... -
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 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 pernašos sistemoje „Dirvožemis – Grybai – Žmogus“ tyrimas
(Journal of environmental engineering and landscape management, 2009)Straipsnyje nagrinėjama dirbtinės kilmės radionuklido 137Cs savitasis aktyvumas valgomuosiuose grybuose bei grybavietės dirvožemyje. 137Cs savitasis aktyvumas buvo matuotas pavieniuose dirvožemio sluoksniuose, valgomuosiuose ... -
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 ... -
2-Phenyl-1,2,3-benzotriazole Ir(III) complexes with additional donor fragment for single-layer PhOLED devices
(Dyes and pigments, 2013)Phosphorescent bis-cyclometallated iridium (III) complexes based on 2-phenyl-1,2,3-benzotriazole with additional donoric diphenylamine or carbazole moieties were synthesized, studied and tested as phosphorescent materials ... -
2014 m. aktualijos Lietuvos filosofinėje padangėje: du filosofai – du jiems skirti įvertinimai
(Filosofija. Sociologija, 2015)Straipsnyje pristatomi du svarbūs Lietuvos kultūrai ir filosofijai įvykiai – dr. Vaclovui Bagdonavičiui Valstybinės Jono Basanavičiaus premijos skyrimas ir dr. Žibartui Juozui Jackūnui Mykolo Romerio universiteto (MRU) ... -
25th International Symposium on Automation and Robotics in Construction
(Automation in construction: an international research journal, 2010) -
2D CFD simulation of dynamic heat transfer in an open-type refrigerated display cabinet
(Applied sciences, 2022)This study uses a simplified two-dimensional time-dependent computational fluid dynamic (CFD) model to study the influence of wall shelf configuration and outtake honeycomb inclination angle on the performance of the air ... -
3-D modeling of nanostructures evolution in lateral etching processes
(Mechanika, 2008)We have developed 3-D model of evolution of the nano- and microstructures geometry in lateral etching processes. The modeling results for the different initial geometry structures are presented. The experimental inves-tigations ... -
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 ... -
3D finite element analysis and experimental investigations of a new type of timber beam-to-beam connection
(Engineering structures, 2015)The application of modeling approaches for timber has proven suitable for the analysis of such a type of timber beam-to-beam connection and, consequently, might be used for further optimization of this connection. -
3D printing technology as a method for discovering new creative opportunities for architecture and design
(Landscape architecture and art, 2018)3D printing technology has been in existence for several decades and has long been used exclusively for industrial manufacturing or product prototyping, and today this rapidly progressing technology penetrates more and ... -
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 ... -
5G standalone and 4G multi-carrier network-in-a-box using a software defined radio framework
(Sensors: Special issue: Experimentation in 5G and beyond networks: State of the art and the way forward, 2021)In this work, an open Radio Access Network (RAN), compatible, scalable and highly flexible Software Defined Radio (SDR)-based Remote Radio Head (RRH) framework is proposed and designed. Such framework can be used to implement ... -
70th anniversary of the birth of academician Edmundas Kazimieras Zavadskas
(Technological and economic development of economy, 2014)Born in Vilnius on 12 May 1944, the Academician and Professor Edmundas Kazimieras Zavadskas turned 70. He is the founder and the Editor-in-Chief of the Journal “Technological and Economic Development of Economy” (TEDE). ... -
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 ... -
90Sr kaupimosi paprastosios pušies (Pinus Sylvestris L.) medienoje tyrimas
(Journal of environmental engineering and landscape management, 2008)Pateikiami 90Sr medienoje tyrimo rezultatai, pagal kuriuos jis kinta nuo (0,03±0,01) Bq/kg iki (2,32±0,34) Bq/kg. Autoriai siūlo 90Sr sukauptam pušies medienoje kiekiui modeliuoti naudoti FORM modelį. Vidutinis skirtumas ...