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Panevezys, Lithuania

Jukna T.,Kaunas University of Technology | Sinkevicius V.,Kaunas University of Technology | Urbanaviciute L.,Kaunas University of Technology | Urbanaviciute L.,Panevezys College | Valickas J.,Kaunas University of Technology
Elektronika ir Elektrotechnika | Year: 2016

The research of non-invasive method for condensate resistance measurement uses a substrate with a single-contact area. The novelty of this measurement method lies in the use of electrical current of electrons emitted during the process of electronic emission from an evaporator. Therefore, there is no need of any additional current or voltage source. This study develops a mathematical model describing the performance and dependencies of this method of measurement. The adequacy of this mathematical model was investigated experimentally. For this purpose, the results of direct measurement of substrate condensate resistance were used.

Morkvenaite-Vilkonciene I.,Panevezys College | Virzonis D.,Kaunas University of Technology | Vanagas G.,Kaunas University of Technology | Krikscikas V.,UAB Minatech
Elektronika ir Elektrotechnika | Year: 2012

CMUT FEM 2D electrostatic model was created to investigate dielectric surface roughness influence to the operating point. Three different form structures: triangle, half-circle, rectangle were investigated. The highest electric field norm concentration on the triangle apex was found. For experiments, dielectric surface was etched by two etching steps to define the cavity: reactive ion etching and buffered oxide etching for smoothing the cavity bottom. Atomic force microscopy was used to monitor and control the roughness of the cavity bottom. The simulation showed the decrease of the effective gap by 0.6 % and 1.0 % in 10 and 20 nm RMS cases, respectively. Voltage-capacitance tests of the fabricated devices with known roughness values confirmed the assumptions about the roughness-induced operating point shifts. © Kauno technologijos universitetas, 2012.

Jukna T.,Kaunas University of Technology | Sinkevicius V.,Kaunas University of Technology | Urbanaviciute L.,Kaunas University of Technology | Urbanaviciute L.,Panevezys College
Elektronika ir Elektrotechnika | Year: 2014

Electrical resistance of the vacuum-deposited condensate has non-linear relation to the condensate film thickness. Therefore, there exists a need for experiments to study applicability of the non-invasive method for condensate resistance measurement and to identify parameters by measuring condensate resistance directly. By using two-point measurement probes, this study analyses the influence of electrons emitted in the process of evaporator electronic emission on the method for direct measurement of condensate resistance.

Lieponiene J.,Vilnius Gediminas Technical University | Lieponiene J.,Panevezys College | Kulvietiene R.,Vilnius Gediminas Technical University
Informatics in Education | Year: 2011

The article presents the consideration of grading scales used for education outcomes in different countries, describes likeness and differences of applied grading scales. Application of the European Credit Transfer and Accumulation System (ECTS) grading scale is investigated according of the analysis of scientific literature as well as cases of its mistaken application. The article provides a model for grades transfer from one scale into another, specifies the results of experimental testing of the introduced model, and analyzes cases of mistaken grades transfer. © 2011 Vilnius University.

Kaliasas R.,Kaunas University of Technology | Krikscikas V.,Kaunas University of Technology | Morkvenaite-Vilkonciene I.,Panevezys College
Intelligent Technologies in Logistics and Mechatronics Systems, ITELMS 2011 - Proceedings of the 6th International Conference | Year: 2011

The paper presents an investigation of formation optical structures with electron beam on dielectric background. Problem with dielectric background was resolved to covering polymer (PMMA) with silver layer.

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