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Search Results: 1 - 6 of 6 matches for " Edgaras Leichteris "
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Science and Technology Parks in the Context of Social Technologies
Edgaras Leichteris
Social Technologies , 2011,
Abstract: Summary. This article aims to present a new approach to science and technology park concept and the development prospects in the context of social technologies. Globalization and the spread of social technologies are expanding the influence of science and technology parks on national innovation systems. It opens new directions for research in this area, as well as the practical use of social technologies in the development of science and technology parks. The paper also examines the science and technology park as an institutionalized concept of social technology. In this article the interdisciplinary approach for analyzing the complex concept of science and technology parks is used to explore the theoretical relationships with the social technologies concept. The possible links are identified and illustrated by practical examples of Lithuanian science and technology parks. Finally suggestions for further research are made. Based on the analysis and synthesis of scientific literature in both fields (science and technology parks; social technologies) three possible theoretical links are established: a) the use of social technologies in science and technology parks b) the role of a science park as an intermediate body in the humanization and socialization of technologies c) science and technology parks as an institutionalized concept of social technology. The theoretical model is supported by empirical illustrations from the development of Lithuanian science and technology parks, therefore further research in all three directions is feasible and needed. As this research takes a merely theoretical approach to the social systems investigation, it can be qualified only as a preparational stage for further research. The practical examples used in the article are more illustrative than evidence based and shall not be considered as case studies. The research offers an initial framework for researching science and technology parks in the context of social technologies. Establishment of stronger interdisciplinary links of those different concepts has an impact on the effectiveness of the management of science and technology parks, competitiveness of regional and national economies. It allows definition of the areas for future research in a more detailed way, to make particular case studies and gather further evidence on the strength of established links, their main characteristics. It also allows design of new management models for science and technology parks, formulates the recommendations on the effectiveness of science and technology parks as institutions and
Social Technologies for Developing Collective Intelligence in Networked Society
Aelita Skarzauskiene,Birute Pitrenaite-Zileniene,Edgaras Leichteris,Zaneta Paunksniene,Monika Maciuliene
Computer Science , 2014,
Abstract: The scientific problem in our project is defined as a question: how social technologies could contribute to the development of smart and inclusive society? The subject of our research are networked projects (virtual CI systems) which include collective decision making tools and innovation mechanisms allowing and encouraging individual and team creativity, entrepreneurship, online collaboration, new forms of self-regulation and self-governance, self-configuration of communities by considering these projects as being catalyst for emergence of CI. The answers to these theoretical questions could have huge practical implications by influencing more reasonable and sophisticated application of social technologies in practice.
Staging the Nation: the Case of Lithuanian Fin de Siècle Theatre Productions in Foreign Industrial Centers. Lavastades rahvust: Leedu fin de siècle’i lavastused v lismaistes t stuskeskustes
Edgaras Klivis
Methis : Studia humaniora Estonica , 2009,
Abstract: Suur hulk omavahel seotud teatrisündmusi (tuntud Leedu htutena”), mis leidsid aset 19. sajandi l pul Leedus ja Leedu emigrantide kogukondades v lismaal, moodustasid olulise j u moodsa rahvusluse kui uue kultuurilise identiteedi levitamisel, uute suhtlemisviiside ja uue (rahvusliku) kogukonnatunde loomisel. Niisiis k sitletakse teatriajaloos neid Leedu htuid” ei millegi v hemana kui leedu rahvusliku teatri algallikana, Herderi Ursprung’ina. Perioodi, mil toimusid Leedu htud”, vastastikuse abistamise ühingute esimesed etendused ja mil teater oli osa mitmesugustest teistest pidu htutest, on vaadeldud (ja seda tehakse mitmel moel siiani) kaasaegse professionaalse rahvusliku kultuuri pika arengutee esimese, embrüonaalse astmena. Tuginedes kahele leedu teatriloo varasemat perioodi k sitlevale olulisemale uurimusele – Balys Sruoga teosele Leedu teater St. Peterburgis” (1930) ja Vytautas Maknysi maailmateatri ajaloole (1972) –, uuritakse artiklis rahvuslike representatsioonide kujundeid ja retoorikat leedu teatri ajaloos, mis tuginevad autohtonismi (algup rasuse), metafüüsilise p ritolu ja rahvusliku kultuuri eneseküllasuse ideedele. Pakutakse v lja alternatiivne ajalooline stsenaarium – tegelikult avaldas leedu rahvusliku teatri varastele vormidele otsustavat m ju mitte mingi algup rase“ eelajaloolise identiteedi transtsendentaalne kohalolu, vaid pigem t stusliku ühiskonna v randatus, kontrastirohkus ja heterogeensus, nagu seda tajusid Leedu emigrandid v lismaistes t stuskeskustes
Biometric Features in Person Recognition Systems Biometriniai po ymiai asmens atpa inimo sistemose
Edgaras Ivanovas
Science – Future of Lithuania , 2010, DOI: 10.3846/mla.2010.005
Abstract: Lately a lot of research effort is devoted for recognition of a human being using his biometric characteristics. Biometric recognition systems are used in various applications, e. g., identification for state border crossing or firearm, which allows only enrolled persons to use it. In this paper biometric characteristics and their properties are reviewed. Development of high accuracy system requires distinctive and permanent characteristics, whereas development of user friendly system requires collectable and acceptable characteristics. It is showed that properties of biometric characteristics do not influence research effort significantly. Properties of biometric characteristic features and their influence are discussed. Article in Lithuanian iuo metu daug d mesio skiriama tiksliam mogaus tapatyb s nustatymui, ypa pagal asmeninius bruo us, kuri mogus neturi atsiminti, negali pamesti. Kuriamos biometrin s asmens atpa inimo sistemos taikomos daugelyje sri i nuo asmens identifikavimo kertant alies sien iki aunamojo ginklo, leid iant juo naudotis tik asmeniui, kuriam jis buvo i duotas. Straipsnyje ap velgiami asmens biometriniai bruo ai ir j savyb s, lemian ios s kming j pritaikym asmeniui atpa inti. Tirta, kaip naudojam bruo savyb s takoja biometrini sistem atpa inimo tikslum ir patogum vartotojui bei mokslini straipsni skai i . Pasteb ta, jog didelio tikslumo atpa inimo sistemoms naudojamas bruo as turi būti skiriantis ir nuolatinis, o ma esnio – priimtinas vartotojui ir lengvai i matuojamas. Nustatyta, kad bruo savyb s beveik ne takoja publikacij skai iaus, aptarti kiti faktoriai, galintys takoti tyrim apimtis. Nagrin jamas paimto biometrinio m ginio transformavimo po ymius reikalingumas. Aptariami pla iausiai naudojami biometrinio m gini po ymiai ir j savyb s bei taka sistemos atpa inimo tikslumui bei veikimo grei iui. Straipsnis lietuvi kalba
Non-endothelial endothelin counteracts hypoxic vasodilation in porcine large coronary arteries
Elise R Hedegaard, Edgaras Stankevicius, Ulf Simonsen, Ole Fr?bert
BMC Physiology , 2011, DOI: 10.1186/1472-6793-11-8
Abstract: In prostaglandin F2α (PGF2α, 10 μM)-contracted segments with endothelium, gradual lowering of oxygen tension from 95 to 1% O2 resulted in vasodilation. The vasodilation to O2 lowering was rightward shifted in segments without endothelium at all O2 concentrations except at 1% O2. The endothelin receptor antagonist SB217242 (10 μM) markedly increased hypoxic dilation despite the free tissue ET-1 concentration in the arterial wall was unchanged in 1% O2 versus 95% O2. Exogenous ET-1 reversed hypoxic dilation in segments with and without endothelium, and the hypoxic arteries showed an increased sensitivity towards ET-1 compared to the normoxic controls. Without affecting basal NO, hypoxia increased NO concentration in PGF2α-contracted arteries, and an NO synthase inhibitor, L-NOARG,(300 μM, NG-nitro-L-Arginine) reduced hypoxic vasodilation. NO-induced vasodilation was reduced in endothelin-contracted preparations. Arterial wall ADMA concentrations were unchanged by hypoxia. Blocking of potassium channels with TEA (tetraethylammounium chloride)(10 μM) inhibited vasodilation to O2 lowering as well as to NO. The superoxide scavenger tiron (10 μM) and the putative NADPH oxidase inhibitor apocynin (10 μM) leftward shifted concentration-response curves for O2 lowering without changing vasodilation to 1% O2. PEG (polyethylene glycol) catalase (300 u/ml) inhibited H2O2 vasodilation, but failed to affect vasodilation to O2 lowering. Neither did PEG-SOD (polyethylene glycol superoxide dismutase)(70 u/ml) affect vasodilation to O2 lowering. The mitochondrial inhibitors rotenone (1 μM) and antimycin A (1 μM) both inhibited hypoxic vasodilatation.The present results in porcine coronary arteries suggest NO contributes to hypoxic vasodilation, probably through K channel opening, which is reversed by addition of ET-1 and enhanced by endothelin receptor antagonism. These latter findings suggest that endothelin receptor activation counteracts hypoxic vasodilation.The systemic vascular re
Cracking and Strain Analysis of Beams Reinforced with Composite Bars
Edgaras Timinskas,Ronaldas Jakubovskis,Adas Me?k?nas,Eugenijus Gudonis
Science – Future of Lithuania , 2012,
Abstract: The paper discusses the results of experimental and numerical modelling using two beams reinforced with GFRP bars. One beam was made of plain concrete while the other contained short steel fibres. The influence of steel fibres on deflection and cracking behaviour was studied. A comparative analysis of experimental results has shown that steel fibres significantly reduce deflections and average crack width of the beam. Moreover, an addition of steel fibres to the concrete mix led to a more ductile failure mode of the beam. Numerical analysis employing nonlinear finite element software ATENA has revealed that a good agreement between calculated and experimental results regarding an ordinary concrete GFRP reinforced beam can be obtained.
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