New changes in the Lithuanian energy sector

One of the most important strategic goals in Lithuania is implementation of sustainable development provisions. Taking into consideration closure of Ignalina Nuclear Power Plant implementation of this aim depends very much on development of the Lithuanian energy sector. This paper presents some findings from the analysis of the Lithuanian energy policy and the energy sector development, in particular taking into consideration the role of energy efficiency, renewable energy sources and nuclear energy. The paper focuses on changes in primary energy balance and in deployment of renewable energy sources over the period 2010–2020. The paper also presents analysis of changes in electricity generation taking focus on factors stimulating construction of new regional nuclear power plant in Lithuania and factors limiting its attractiveness. Keywords: Energy sector, sustainable development, nuclear energy, energy intensity, renewable energy

Energy efficiency as precondition of energy security

Increase of energy efficiency remains as one of the major strategic objectives in Lithuania. Effective use of existing energy saving potential increases energy security and reduces emissions of greenhouse gas and other pollutants. In order to meet the growing energy demand and to reduce the negative impact of the energy sector on environment, increase of the role of renewable energy sources in the country’s primary energy balance, as well as larger deployment of energy-efficient and smart technologies in all areas, including military structures, are required. When analysing energy security and energy efficiency, as the two interrelated aspects of the Lithuanian energy policy, assessment of the global energy trends in the world, the EU and neighbouring countries, expected developments in the modern technologies, as well as global aspirations to neutralize the threat of climate change was performed. The paper provides an overview of energy consumption trends in the European Union and Lithuania, energy policy in the NATO alliance, as well the current status of energy consumption in the Lithuanian National Defence System

Medicine and electronics : hearts and integrated circuits

Straipsnis apžvelgia, kaip mikroelektronikos pažanga per paskutiniuosius dešimtmečius pakeitė kardiologijoje naudajamus tyrimo metodus. Akcentuojami elektro­kardiogra­mos analizės metodai. Integralinių schemų tobulėjimas bei greitų ir nebrangių kompiuterių atsiradimas padėjo sukrti naujus jutiklius, naujus instrumetus ir naujas sistemas, galinčias surinkti ir apdoroti apdoroti daugelį kartų daugiau elektro­kar­diogramų informacijos, nei prieš kelis dešimtmečius rankiniu būdu apdorodavo gydytojai. Kompiuterinių tinklų išsivystymas leido įgyvendinti telekardiologijos idėją – konsultacijas vykdyti per nuotolį, į kardiologijos centrus siunčiant ne ligonius, o tik jų elektrokardiogramas. Idėja Kauno kardiologijos institute buvo pradėta vystyti prieš tris dešimtmečius, tačiau tuomet nepaplito dėl blogos ryšių kokybės. Dabar atsirado technės galimybės kurti kardiologijos telekonsultacines sistemas, turinčias galimybę dirbti dialoginiame bei paketiniame režimuose. Telekonsultacines sistemas naudinga jungti su automatinės kardiogramų analizės sistemomis, kurios taip pat jau keletą dešimtmečių kuriamos ir tobulinamos Kauno kardiologijos institute. Jungtinės sistemos padėtų kardiologiniuose centruose kaupti diagnozei ir sveikatos apsaugos administravimui reikalingą statistiką. Duomenų surinkimo srityje sukurtos daugiataškių kardiogramų surinkimo sistemos, pajėgiančios išmatuoti virš šimto derivacijų, bei didelės skiraimosios gebos elektrokardiogramų surinkimo sistemos. Naujų duomenų srautas paskatino tobulinti siganlų apdorojimo metodus. Analizuojant didelės skiriamosiso gebos kardiogramas buvo patvirtinta vadinamųjų vėlyvųjų potencialų prognostinė reikšmė. Greta Furje analizės imta taikyti spektrotemporalinė bei vilnelių analizė. [...]There is reviewed development of diagnostics of heart diseases during the last 20 years. It was proved that new methods of signal processing enable to diagnose heart diseases more precisely. [...]Kauno medicinos universiteto Kardiologijos institutasKauno technologijos universitetasTaikomosios informatikos katedraVilniaus universitetasVytauto Didžiojo universiteta

Preparation and characterization of Li2.9Sc1.9-yYyZr0.1(PO4)3 (where y=0, 0.1) solid electrolyte ceramics

The solid electrolyte Li2.9Sc1.9-yYyZr0.1(PO4)3 (where y = 0, 0.1) compounds belong to monoclinic symmetry (space group P21/n) at room temperature. The Zr 3d, Sc 2p, P 2p, Y 3d, O 1s, and Li 1s core level X-ray photoelectron spectra (XPS) were fitted. The Li ions in ceramics without Y occupy two different positions and in the ceramics with Y they occupy one position in the lattice. The deconvolutions of the Zr 3d, P 2p, Sc 2p, and Y 3d core level XPS are associated with different valence states on the surfaces of the investigated ceramics. Anomalies of enthalpy, change of activation energy of ionic conductivity, anomalies of dielectric permittivity in the temperature range 420-520 K of investigated compounds were found. The phenomena are related to diffuse structure phase transition in the compounds. At temperatures 600 and 900 K, the compounds belong to orthorhombic symmetry (space group Pbcn)Lietuvos energetikos institutasVilniaus universitetasVilniaus universiteto Medžiagotyros ir taikomųjų mokslų institutasVytauto Didžiojo universitetasŠvietimo akademij

Influence of Laser Annealing on Defect-Related Luminescence of InGaN Epilayers

InGaN epilayers exhibiting strongdefect-related sub-band gap emission,which is undesirable in epilayers and quantum well structures designed for light-emitting diodes and laser diodes,have been studied by confocal photoluminescence spectroscopy,Auger electron spectroscopy,and atomic force microscopy. Inhomogeneous spatial distribution of band-edge luminescence intensity and compara- tively homogenous distribution of defect-related emission are demonstrated.It is shown that laser annealing at power densities causing the increase of the temperature at the epilayer surface high enough for indium atoms to move to the surface results in suppression of the defect-related emission