A theoretical study of electron drift mobility anisotropy in n-type 4H- and 6H-SiCVelmre, Enn; Udal, AndresAbstracts of International Conference on Silicon Carbide and Related Materials : ICSCRM'99 : October 10-15, 1999, Research Triangle Park, North-Carolina, USA1999 / paper no 395, 2 p A theoretical study of electron drift mobility anisotropy in n-type 4H- and 6H-SiCVelmre, Enn; Udal, AndresProceedings of the International Conference on Silicon Carbide and Related Materials - 1999 (ICSCRM'99) : Research Triangle Park, North-Carolina, USA, Oct. 10-15, 1999. Vol. 12000 / p. 725-728 A theoretically accurate mobility model for drift-diffusion power device simulationVelmre, Enn; Udal, Andres; Kocsis, T.; Masszi, F.16th Nordic Semiconductor Meeting, Laugarvatn, Iceland, June 12-15, 1994 : abstracts1994 / p. 92 A theoretically accurate mobility model for semiconductor device drift-diffusion simulationVelmre, Enn; Udal, Andres; Kocsis, T.; Masszi, F.Physica scripta1994 / p. 263-267 Ab inito study of GaN properties using VASP software packageKlopov, Mihhail; Kuusk, Ahto; Velmre, Enn; Udal, AndresBEC 2004 : proceedings of the 9th Biennial Baltic Electronics Conference : October 3-6, 2004, Tallinn, Estonia2004 / p. 55-58 : ill Advances in terahertz technology with emphasis on quantum cascade lasersReeder, Reeno; Velmre, Enn; Udal, AndresElektronika ir elektrotechnika = Electronics and electrical engineering2010 / 8, p. 47-50 https://eejournal.ktu.lt/index.php/elt/article/view/9225 An engineering approach to time-frequency uncertainty criteriaUdal, Andres; Kukk, VelloElektronika ir elektrotechnika. T 121, Signalu technologija = Electronics and electrical engineering. T121, Signal technology2012 / p. 3-8 : ill https://www.researchgate.net/publication/268434924_An_Engineering_Approach_to_Time-Frequency_Uncertainty_Criteria Analyzes of competence based approach to learningUmbleja, Kadri; Kukk, Vello; Jaanus, Martin; Udal, Andres; Gordon, BorisInternational Conference on Engineering Education 2012 : proceedings : Turku, Finland, July 30-August 3, 2012. Part 22012 / p. 418-425 : ill Apparent decrease of diffusion coefficients due to the plasma-induced band gap narrowingUdal, Andres; Velmre, Enn19th Nordic Semiconductor Meeting : May 20-23, 2001, Copenhagen, Denmark : abstracts2001 / p. 22 : ill A brief survey of excition concentration models for SiVelmre, Enn; Udal, AndresThe 7th Biennial Conference on Electronics and Microsystem Technology "Baltic Electronics Conference" : BEC 2000 : October 8 - 11, 2000, Tallinn, Estonia : conference proceedings2000 / p. 19-22 : ill Compact empirical model for droplet generation in a Lab-on-Chip cytometry systemPärnamets, Kaiser; Udal, Andres; Koel, Ants; Pardy, Tamas; Gyimah, Nafisat; Rang, ToomasIEEE Access2022 / p. 127708-127717 https://doi.org/10.1109/ACCESS.2022.3226623 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Comparison of methods for solving the Schrödinger equation for multiquantum well heterostructure applicationsUdal, Andres; Reeder, Reeno; Velmre, Enn; Harrison, PaulProceedings of the Estonian Academy of Sciences. Engineering2006 / 3-2, p. 246-261 : ill Comparison of photon recycling effect in GaAs and GaN structuresVelmre, Enn; Udal, AndresProceedings of the Estonian Academy of Sciences. Engineering2004 / 3, p. 157-172 Comparison of Si and SiC devices surge current capability by means of numerical simulationsVelmre, Enn; Udal, AndresBEC'96 : the 5th Biennial Baltic Electronics Conference, October 7-11, 1996, Tallinn, Estonia : proceedings1996 / p. 77-80: ill Comparison of single-rate and two-rate neural control approaches for coaxial rotor/ducted-fan TUAV for situational awareness applicationsPedai, Andrus; Astrov, Igor; Udal, Andres2018 IEEE 16th International Symposium on Intelligent Systems and Informatics (SISY), 13-15 Sept. 2018 : proceedings2018 / p. 63–68 : ill http://dx.doi.org/10.1109/SISY.2018.8524720 Comparison of uncertainty relations in quantum mechanics and signal processingUdal, Andres; Kukk, Vello; Velmre, Enn; Klopov, Mihhail11th International Conference on Squeezed States and Uncertainty Relations and 4th Feynman Festival : Olomouc, Czech Republic, June 22-26, 20092009 / p. 154 Comparison of uncertainty relations in quantum mechanics and signal processing [Electronic resource]Udal, Andres; Kukk, Vello; Velmre, Enn; Klopov, Mihhail11th International Conference on Squeezed States and Uncertainty Relations and 4th Feynman Festival : Olomouc, Czech Republic, June 22-26, 2009 : conference proceedings2009 / [16] p. [DVD] Competence Based Interactive Learning with HomeLabKits : experience and work in progressJaanus, Martin; Umbleja, Kadri; Kukk, Vello; Udal, Andres2014 IEEE Global Engineering Education Conference (EDUCON) : Istanbul, Turkey, April 2-5, 20142014 / 1082-1084 : ill Computer aided modeling of high frequency power M-S structuresRang, Toomas; Udal, AndresProceedings of the seventh Colloquium on Microwave Communication : Budapest, 6-10 Sept. 19821982 / p. 238-241 Computer aided simulation of power Scottky DiodesRang, Toomas; Koel, Ants; Udal, AndresModeling, Simulation and Control1985 / p. 1-13 Computer-aided analysis of the GTO thyristor current squeezing effectVelmre, Enn; Udal, AndresAutomation, simulation & measurement : ASM'91 : 3rd biennal conference, Tallinn, October 7-11, 1991. Section S / Tallinn Technical University1992 / p. 159-171: ill COMSPECT : a compact model for green vegetation reflectance spectra in the 400–900 nm wavelength rangeUdal, Andres; Jürise, Martin; Kaugerand, Jaanus; Sell, RaivoProceedings of the Estonian Academy of Sciences2020 / p. 277-286 : ill https://doi.org/10.3176/proc.2020.4.01 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Corrected accounting of electron-hole scattering in cross-term current equations for Si and SiCVelmre, Enn; Udal, AndresPhysica scripta1999 / Proceedings of 18th Nordic Semiconductor Meeting, Linköping, Sweden, June 7-10, 1998, ISBN 91-87308-71-1, p. 193-197: ill https://ui.adsabs.harvard.edu/abs/1999PhST...79..193V/abstract Corrected accounting of electron-hole scattering in cross-term current equations for Si and SiCVelmre, Enn; Udal, Andres18th Nordic Semiconductor Meeting, Linköping, June 7-10, 1998 : abstracts1998 / p. F-88: ill Critical analysis of uncertainty relations based on signal duration and spectrum widthUdal, Andres; Kukk, Vello; Velmre, EnnElektronika ir elektrotechnika = Electronics and electrical engineering2009 / 6, p. 31-34 : ill Department of ElectronicsMin, Mart; Parve, Toomas; Laansoo, Ants; Männama, Vello; Velmre, Enn; Udal, AndresResearch activities / Tallinn Technical University1993 / p. 79-81 https://www.ester.ee/record=b1053754*est Depopulation mechanism for incoherent terahertz source – THz Torch – based on GaAsBi/GaAs quantum well in GaAs/AlGaAs parabolic quantum wellKaraliunas, Mindaugas; Udal, Andres; Valušis, GintarasLithuanian journal of physics2020 / p. 113-124 https://doi.org/10.3952/physics.v60i2.4226 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Development and optimisation of modelling methods and algorithms for terahertz range radiation sources based on quantum well heterostructures = Kvantaukudega heterostruktuuridel põhinevate terahertskiirgurite modelleerimismeetodite ja -algoritmide arendus ja optimeerimineReeder, Reeno2014 https://www.ester.ee/record=b3084247*est Development and testing of a compact voice command recognition algorithm for limited complexity microcontroller devicesUdal, Andres; Riid, Andri; Jaanus, Martin; Pärnamets, Kaiser; Lokuta, Madis2018 22nd International Conference Electronics : Palanga, Lithuania, 18-20 June 20182018 / p. 1-4 : ill http://doi.org/10.1109/ELECTRONICS.2018.8443645 Development of numerical semiconductor device models and their application in device theory and designUdal, Andres1998 http://www.ester.ee/record=b1158907*est Development of numerical semiconductor device models and their application in device theory and design = Pooljuhtseadiste numbriliste mudelite väljatöötamine ja rakendamine seadiste teoorias ja disainis : [a thesis ... of doctor of philosophy in engineering]Udal, Andres1998 http://www.ester.ee/record=b2688054*est Development of quantum cascade laser simulation softwareUdal, Andres; Reeder, Reeno; Ikonic, Zoran; Harrison, Paul; Velmre, EnnBEC 2012 : 2012 13th Biennial Baltic Electronics Conference : proceedings of the 13th Biennial Baltic Electronics Conference : October 3-5, 2012, Tallinn, Estonia2012 / p. 47-48 : ill Development of the software tools for simulation of quantum well media for radiation amplification in MIR and THz regionsUdal, Andres; Reeder, Reeno; Valusis, G.; Kasalynas, I.; Ikonic, Zoran; Indjin, D.3rd Annual Conference of COST Action MP1204 & 6th International Conference on Semiconductor Mid-IR Materials and Optics SMMO2015 : book of abstracts : Institute of Photonics and Electronics, The Czech Academy of Sciences, Prague, Czech Republic, April 8-11, 20152015 / p. 63 Discussion of the development aspects of the quantum cascadelaser simulation softwareReeder, Reeno; Udal, Andres; Velmre, EnnInternational Conference on THz and Mid Infrared Radiation and Applications to Cancer Detection Using Laser Imaging : workgroup meetings of Cost Actions MP1204 and BM1205 : October 10-11, 2013, Sheffiled Hallam University, United Kingdom2013 / p. [36] Easy to use empirical model for green vegetation reflection spectrum in VIS-NIR rangeUdal, Andres; Jürise, Martin; Kaugerand, Jaanus; Sell, RaivoSPIE digital library2020 / art. 115240H-1–14 https://doi.org/10.1117/12.2570820 Conference proceeding Article at Scopus Article at WOS Eesti keskkonnategevuskava [2001 - 2003]Kiili, Jaanus; Kask, Ülo; Liik, Olev; Metsvahi, Tiit; Paadam, Katrin; Adamson, Alo; Hendre, Marju; Hääl, Maire-Liis; Kändler, Nils; Loigu, Enn; Randla, Tiina; Reinsalu, Enno; Seepõld, Marit; Udal, Andres; Vilu, Raivo2001 https://www.ester.ee/record=b1550399*est Efficiency estimation for a broadband 7 THz radiation source with GaAs/AlGaAs parabolic quantum wellsReeder, Reeno; Ikonic, Zoran; Harrison, Paul; Udal, Andres; Velmre, EnnThe proceedings of the Ninth International Conference on Intersubband Transitions in Quantum Wells : Ambleside, Cumbria, U.K., 9-14th September 20072007 / p. P67-2 Electrothermal simulation of power semiconductor devicesFreidin, Boris; Velmre, Enn; Udal, AndresProceedings of the 1991 International Workshop on VLSI Process and Device Modeling, 26-27 May, 1991, Oiso, Kanagava, Japan1991 / p. 28-29 Electro-thermal simulations and forward surge current failure prediction for SiC diodesVelmre, Enn; Udal, AndresProgram of 17th Nordic Semiconductor Meeting, Trondheim, Norwey, June 17-20, 19961996 / p. 28 Embedded blur-free single-image acquisition pipeline for droplet microfluidic imaging flow cytometry (IFC)Afrin, Fariha; Pärnamets, Kaiser; Le Moullec, Yannick; Udal, Andres; Koel, Ants; Pardy, Tamas; Rang, ToomasIEEE Access2024 / p. 92431-92441 https://doi.org/10.1109/ACCESS.2024.3421637 Enhancement of photoluminescence of GaAsBi quantum wells by parabolic design of AlGaAs barriersPukiene, Simona; Karaliunas, Mindaugas; Jasinskas, A.; Udal, AndresNanotechnology2019 / art. 455001, 11 p. : ill https://doi.org/10.1088/1361-6528/ab36f3 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Experimentally adjusted modelling and simulation technique for a catamaran autonomous surface vesselAstrov, Igor; Udal, Andres; Mõlder, Heigo; Jalakas, Tanel; Möller, TaaviInternational Conference on Electrical, Computer, and Energy Technologies, ICECET 2022, Prague, Czech Republic, July 20-22, 20222022 / 7 p. : ill https://doi.org/10.1109/ICECET55527.2022.9873069 Failure prediction of power devices under reverse surge current conditionsFreidin, Boris; Velmre, Enn; Udal, AndresProc. of the 4th International Symposium on Power Semiconductor Devices May 1992 Waseda University1992 / p. 118-128: fig GIGA - power semiconductor devices simulation softwareFreidin, Boris; Velmre, Enn; Udal, AndresThe Bug Exterminator (USA). Special issue, Santa Clara1990 / Dec., p. 1-16: fig GIGA: failure prediction of ESD protection devicesFreidin, Boris; Udal, AndresThe Bug Exterminator : a monthly publication of Silvaco International1992 / 11, p. 1-3 High phonon-drag thermoelectric efficiency of SiC at low temperaturesVelmre, Enn; Udal, Andres; Grivickas, V.Final program of the 10th International Conference on SiC and Related Materials : ICSCRM'2003 : Lyon, France, Oct. 5-10, 20032003 / p. ThP4-13 https://www.researchgate.net/publication/240834700_High_Phonon-Drag_Thermoelectric_Efficiency_of_SiC_at_Low_Temperatures High precision parabolic quantum wells grown using pulsed analog alloy grading technique: Photoluminescence probing and fractional-dimensional space approachKaraliunas, Mindaugas; Dudutiene, Evelina; Čerškus, Aurimas; Pagalys, Justas; Pūkiene, Simona; Udal, Andres; Butkute, Renata; Valušis, GintarasJournal of luminescence2021 / art. 118321, 9 p https://doi.org/10.1016/j.jlumin.2021.118321 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Hüperspektraalsensoorika rakendamine militaarobjektide signatuuride tuvastamiseks ja varjamiseksJürise, Martin; Udal, Andres; Kaugerand, JaanusSõjateadlane = Estonian journal of military studies2018 / lk. 150–170 : ill https://www.ksk.edu.ee/wp-content/uploads/2019/02/06_jyrise.pdf https://artiklid.elnet.ee/record=b2872674*est Hyperspectral camera with polarized filter as modern supersensor device for cyber-physical systems [Online resource]Jürise, Martin; Udal, Andres; Kaugerand, Jaanus; Sell, RaivoBEC 2018 : 2018 16th Biennial Baltic Electronics Conference (BEC) : proceedings of the 16th Biennial Baltic Electronics Conference, October 8-10, 20182018 / 4 p.: ill https://doi.org/10.1109/BEC.2018.8600957 Impact of phonon drag effect on seebeck coefficient in p-6H-SiC : experiment and simulationBikbajevas, V.; Velmre, Enn; Udal, AndresMaterial science forum2003 / p. 407-410 https://www.scientific.net/MSF.433-436.407 Impact of phonon-drag effect on seebeck coefficient in SiC : experiment and simulationBikbajevas, V.; Grivickas, V.; Stölzer, M.; Velmre, Enn; Udal, AndresAbstracts of the Lithuanian National Physics Conference : LNPK-34 : Vilnius, 20032003 / p. 219 Implementation of the robot arm in the interactive learning environmentJaanus, Martin; Udal, Andres; Kukk, Vello; Umbleja, Kadri2014 International Conference on Signals and Electronic Systems (ICSES) : Poznań, Poland, 11-13 September 20142014 / [4] p. : ill Improved C5D electronic realization of conductivity detector for capillary electrophoresisJaanus, Martin; Udal, Andres; Kukk, Vello; Umbleja, Kadri; Gorbatšova, Jelena; Mölder, LauriElektronika ir elektrotechnika = Electronics and electrical engineering2016 / p. 29-32 : ill https://doi.org/10.5755/j01.eie.22.3.15311 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Influence of excitonic scattering on charge carrier ambipolar diffusion in siliconUdal, Andres; Velmre, EnnESSDERC'97 : proceedings of the 27th European Solid-State Device Research Conference, Stuttgart, Germany, 22-24 September 19971997 / p. 212-215: ill Integrated labs for electrical engineering courses in competence based learning environment - practical experienceJaanus, Martin; Umbleja, Kadri; Udal, Andres; Pärnamets, Kaiser2019 Electric Power Quality and Supply Reliability Conference (PQ) & 2019 Symposium on Electrical Engineering and Mechatronics (SEEM), Kärdla, Estonia, June 12-15, 2019 : proceedings2019 / 4 p. : ill https://doi.org/10.1109/PQ.2019.8818266 Interactive distance lab solution for robotic armUmbleja, Kadri; Jaanus, Martin; Kukk, Vello; Udal, AndresJoint International Conference on Engineering Education & International Conference on Information Technology ICEE/ICIT-2014 : June 2-6, 2014, Riga, Latvia2014 / p. 339-348 : ill Investigation of charge carrier lifetime temperature-dependence in 4H-SiC diodesVelmre, Enn; Udal, AndresSilicon carbide and related materials 20062007 / p. 375-378 https://www.researchgate.net/publication/250348987_Investigation_of_Charge_Carrier_Lifetime_Temperature-Dependence_in_4H-SiC_Diodes Investigation of silicon carbide diode structures via numerical simulations including anisotropic effectsVelmre, Enn; Udal, Andres; Masszi, F.; Nordlander, E.Simulation of semiconductor devices and processes. Vol. 61995 / p. 340-343: ill Jõupooljuhtseadiste numbriliste mudelite väljatöötamine ja rakendamine : ainevaldkond : elektrotehnika : magistritööUdal, Andres1992 http://www.ester.ee/record=b2630327*est Kolmas kvantrevolutsioon: kvantarvutite tulekuga kaasnevad probleemid ja võimalusedUdal, AndresPikksilm : ülevaade valitud trendidest2020 / 8 lk https://www.ester.ee/record=b4815518*est https://www.riigikogu.ee/arenguseire/publikatsioonid/ Kullaga legeeritud ränidioodstruktuuride numbriline modelleerimineNiinemets, J.; Veikesaar, E.; Udal, AndresXXXII üliõpilaste teaduslik-tehnilise konverentsi ettekannete teesid : pühendatud V. I. Lenini 110. sünniaastapäevale : 16.-18. aprill 19801981 / lk. 93-94 https://www.ester.ee/record=b1322611*est Kvant-IT : väljakutse info- ja kommunikatsioonitehnoloogia valdkonnale : ettekanne 51. automaatikapäeval 12. märtsil 2013 TTÜsUdal, AndresTallinna Tehnikaülikooli aastaraamat 20132014 / lk. 290-297 : ill Laterally pumped GaAs/AlGaAs quantum wells as sources of broadband tetrahertz radiationReeder, Reeno; Ikonic, Zoran; Harrison, Paul; Udal, Andres; Velmre, EnnJournal of applied physics2007 / 7, [6] p. : ill https://pubs.aip.org/aip/jap/article/102/7/073715/987937/Laterally-pumped-GaAs-AlGaAs-quantum-wells-as Measurement of charge carrier lifetime temperature-dependence in 4H-SiC power diodesUdal, Andres; Velmre, EnnProceedings of the International Conference on Silicon Carbide and Related Materials - 1999 (ICSCRM'99) : Research Triangle Park, North-Carolina, USA, Oct. 10-15, 1999. Vol. 12000 / p. 781-784 https://www.scientific.net/MSF.338-342.781 Measurements of charge carrier lifetime temperature dependence in 4H-SiC power diodesVelmre, Enn; Udal, AndresAbstracts of International Conference on Silicon Carbide and Related Materials : ICSCRM'99 : October 10-15, 1999, Research Triangle Park, North-Carolina, USA1999 / paper no 394, 2 p Militaarobjektide valvetehnoloogia arengUdal, Andres; Kaugerand, Jaanus; Savimaa, Raul; Märtens, OlevSõjateadlane = Estonian journal of military studies2023 / lk. 194-224 : ill Militaarobjektide valvetehnoloogia areng https://www.kvak.ee/sojateadlane22/ https://www.ester.ee/record=b4555087*est A model-based adaptive control of an autonomous driving car for lane change maneuverAstrov, Igor; Udal, Andres; Jaanus, Martin2021 44th International Convention on Information, Communication and Electronic Technology (MIPRO), September 27 - October 1, 2021, Opatija, Croatia : proceedings2021 / p. 1330-1335 : ill http://www.mipro.hr/LinkClick.aspx?fileticket=RAMnkK6T5UQ%3d&tabid=196&language=hr-HR https://doi.org/10.23919/MIPRO52101.2021.9597195 A model-based LQR control of an obstacle avoidance maneuver of a self-driving carAstrov, Igor; Udal, Andres; Pikner, Heiko; Malayjerdi, Ehsan2022 IEEE 20th Jubilee World Symposium on Applied Machine Intelligence and Informatics (SAMI) : Poprad, Slovakia, 2-5 March 20222022 / p. 473-478 : ill https://doi.org/10.1109/SAMI54271.2022.9780755 Modeling of a carbon nanotube junction with ab-inito software VASPVelmre, Enn; Klopov, Mihhail; Udal, AndresBEC 2008 : 2008 International Biennial Baltic Electronics Conference : proceedings of the 11th Biennial Baltic Electronics Conference : Tallinn University of Technology : October 6-8, 2008, Tallinn, Estonia2008 / p. 75-78 : ill Modeling of charge carrier non-isothermal transport parameters in siliconVelmre, Enn; Udal, AndresBEC'98 : the 6th Biennial Conference on Electronics and Microsystems Technology, October 7-9, 1998, Tallinn, Estonia : proceedings1998 / p. 71-74: ill Modeling of lattice heat conductivity and thermopower in SiC considering the four-phonon scattering processesVelmre, Enn; Udal, AndresMaterial science forum2003 / p. 391-394 https://www.scientific.net/MSF.433-436.391 Modeling of photon recycling in GaN-devicesVelmre, Enn; Udal, Andres; Klopov, Mihhail5th European Conference on Silicon Carbide and Related Materials : book of abstracts : 31 August-4 September 2004, Bologna, Italy2004 / p. 317-318 https://www.researchgate.net/publication/250344144_Modeling_of_Photon_Recycling_in_GaN-Devices Modeling of photon recycling in GaN-devicesVelmre, Enn; Udal, Andres; Klopov, MihhailSilicon carbide and related materials 2004 : ECSCRM 2004 : proceedings of the 5th European Conference on Silicon Carbide and Related Materials, August 31-September 4, 2004, Bologna, Italy2005 / p. 1039-1042 : ill https://www.researchgate.net/publication/250344144_Modeling_of_Photon_Recycling_in_GaN-Devices Modeling of photon recycling in GaN-devicesVelmre, Enn; Udal, Andres; Klopov, MihhailMaterial Science Forum. 483/4852005 / p. 1039-1042 https://www.researchgate.net/publication/250344144_Modeling_of_Photon_Recycling_in_GaN-Devices Modelling and simulation of autonomous vehicles and systems and their advanced control methods = Autonoomsete sõidukite ja süsteemide ning nende täiustatud juhtimismetoodikate modelleerimine ja simuleeriminePedai, Andrus2021 https://www.ester.ee/record=b5391357*est https://digikogu.taltech.ee/et/Item/654ccb12-0d81-4ae2-ae07-11248063913c https://doi.org/10.23658/taltech.9/2021 Modelling of charge carrier non-isothermal transport in silicon and silicon carbideVelmre, Enn; Udal, AndresProceedings of the Estonian Academy of Sciences. Engineering2000 / 2, p. 144-154 : ill https://artiklid.elnet.ee/record=b1004044*est Multi-modal sensor data fusion in city environment monitoring projects SMENETE and IMOKaugerand, Jaanus; Ehala, Johannes; Riid, Andri; Preden, Jürgo-Sören; Udal, AndresCOST Action CA16101 MULTI-modal : Imaging of FOREnsic SciEnce Evidence tools for Forensic Science : Grant Period 2 Conference, 5-8 November 2018, Dubrovnik, Croatia. Forensic Imaging Techniques - an exploration of their potential as standalone tools and within a multimodal approach : book of abstracts2018 / p. 36-37 : ill NanoIT2010 : nanoinfotehnoloogia katsekursus info- ja kommunikatsioonitehnoloogia doktorikoolisUdal, AndresA & A2010 / 4, lk. 10-15 : ill Nanotehnoloogia : hirmud, müüdid ja võimalusedUdal, AndresTallinna Tehnikaülikooli aastaraamat 20112012 / lk. 18-33 : ill National environmental action plan 2001-2003 : EstoniaKiili, Jaanus; Kask, Ülo; Vares, Villu; Liik, Olev; Metsvahi, Tiit; Paadam, Katrin; Adamson, Alo; Hendre, Marju; Hääl, Maire-Liis; Kask, Ülo; Kändler, Nils; Loigu, Enn; Randla, Tiina; Reinsalu, Enno; Seepõld, Marit; Udal, Andres; Veiderma, Mihkel; Vilu, Raivo2001 https://www.ester.ee/record=b1593753*est Neural predictive tracking control of catamaran model sailboat for situation awareness applicationsAstrov, Igor; Udal, AndresINES 2020 : IEEE 24th International Conference on Intelligent Engineering Systems, July 8-10, 2020, Reykjavik, Iceland : proceedings2020 / p. 153-158 : ill https://doi.org/10.1109/INES49302.2020.9147126 New concepts of automatic answer evaluation in competence based learningUmbleja, Kadri; Kukk, Vello; Jaanus, Martin; Udal, Andres2014 IEEE Global Engineering Education Conference (EDUCON) : Istanbul, Turkey, April 2-5, 20142014 / p. 922-925 : ill Nonisothermal numerical simulation of semiconductor power devicesVelmre, Enn; Udal, AndresAutomation, simulation & measurement : ASM'91 : 3rd biennal conference, Tallinn, October 7-11, 1991. Section S / Tallinn Technical University1992 / p. 139-145: ill Numerical analysis of the on state of diode structures based on direct-gap semiconductorsVelmre, Enn; Freidin, Boris; Udal, AndresPhysica scripta : an international journal for experimental and theoretical physics1981 / p. 468-471 https://www.ester.ee/record=b2244094*est Numerical aspects of the development of quantum cascade laser simulation softwareReeder, Reeno; Udal, Andres; Velmre, Enn; Valavanis, AlexanderBEC 2014 : 2014 14th Biennial Baltic Electronics Conference : proceedings of the 14th Biennial Baltic Electronics Conference : Tallinn University of Technology, October 6-8, 2014, Tallinn, Estonia2014 / p. 37-40 : ill Numerical investigation of digitised parabolic quantum wells for terahertz AIGaAs/GaAs structuresReeder, Reeno; Udal, Andres; Velmre, Enn; Harrison, PaulBEC 2006 : 2006 International Baltic Electronics Conference : Tallinn University of Technology, October 2-4, 2006, Tallinn, Estonia : proceedings of the 10th Biennial Baltic Electronics Conference2006 / p. 51-54 : ill Numerical investigation of SiC devices performance considering the incomplecte dopant ionizationVelmre, Enn; Udal, AndresSilicon carbide and related materials 20052006 / p. 1383-1386 https://www.scientific.net/MSF.527-529.1383 Numerical simulation of a silicon carbide diodeVelmre, Enn; Udal, AndresBEC : Baltic Electronics Conference : proceedings of the 4th Biennial Conference, October 9-14, 1994, Tallinn (Estonia). 21994 / p. 559-566: ill https://www.ester.ee/record=b2150914*est Numerical simulation of electrothermal effects in ESD protection devicesHellstrom, S.; Freidin, Boris; Velmre, Enn; Udal, AndresTechn. Dig. of the 3rd European Symposium on Reliability of Electron Devices, Failure Physics and Analysis, 1992, Oct. 5-8, Schwabisch Gmünd, Germany1992 Numerical simulation of electrothermal interactions in semiconductors under electrostatic energy pulse conditionsFreidin, Boris; Velmre, Enn; Udal, AndresTechn. Dig. of International Workshop on Computational Electronics, 1992 May 28-29, Beckman Institute, Univ.of Illinois at Urbana Champain, USA1992 A numerical transient analysis of a bulk-barrier diodeUdal, AndresSolid state electronics : an international journal1983 / p. 1130-1131 https://www.ester.ee/record=b1202249*est Nõmme linnaosa vajab liikluse mujale suunamistUdal, AndresEesti Päevaleht1999 / 30. sept., lk. 5: ill An optimal control method for an autonomous surface vessel for environment monitoring and cargo transportation applicationsAstrov, Igor; Udal, Andres; Mõlder, Heigo2021 25th International Conference Electronics : Proceedings of the 25th International Conference : ELECTRONICS 2021, Kaunas University of Technology, 14th–16th June, 2021, Palanga, Lithuania2021 / 6 p https://doi.org/10.1109/IEEECONF52705.2021.9467483 Power diode transicent characteristics modeling in inductive load circuitsFreidin, Boris; Velmre, Enn; Udal, AndresThe Bug Exterminator (USA)1991 / 3, p. 1-5: fig Practical path planning techniques in overtaking for autonomous shuttlesMalayjerdi, Ehsan; Sell, Raivo; Malayjerdi, Mohsen; Udal, Andres; Bellone, MauroJournal of field robotics2022 / p. 410-425 https://doi.org/10.1002/rob.22057 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Progress in development of the resonant tunneling diodes as promising compact sources at the THz gap bottomUdal, Andres; Jaanus, Martin; Valušis, Gintaras; Kašalynas, Irmantas; Ikonic, Zoran; Indjin, DraganTHz for CBRN and explosives detection and diagnosis2017 / p. 169-178 http://doi.org/10.1007/978-94-024-1093-8_20 Quantum mechanical transforms between [hii]- and [kapa]-space as a signal processing problemUdal, Andres; Kukk, Vello; Velmre, Enn; Klopov, MihhailBEC 2008 : 2008 International Biennial Baltic Electronics Conference : proceedings of the 11th Biennial Baltic Electronics Conference : Tallinn University of Technology : October 6-8, 2008, Tallinn, Estonia2008 / p. 71-74 : ill Recent progress in development of the resonant tunneling diode sources for the critical part of THz gapUdal, Andres; Jaanus, Martin; Valušis, Gintaras; Kašalynas, Irmantas; Ikonic, Zoran; Indjin, Dragan4th Annual Conference of COST Action MP1204 & SMMO2016 Conference : Lisbon, Portugal, 21-24 March 20162016 / [1] p Resonant tunneling devices as the promising sources in THz gap bottom for the security imaging and detectionUdal, Andres; Valusis, G.; Kasalynas, I.; Ikonic, Zoran; Indjin, D.Abstract book of Tera-MIR 2015 : NATO Advanced Research Workshop on THz Diagnostics of CBRN Effects and Detection of Explosives & CBRN : Izmir, Turkey, 3-6 November 20152015 / p. 65 SiC-diode forward surge current failure mechanisms : experiment and simulationVelmre, Enn; Udal, AndresESREF'97 : proceedings of the 8th European Symposium on Reliability of Electron Devices, Failure Physics and Analysis, Oct. 7-10, 1997, Bordeaux, France1997 / p. 1671-1674 SiC-diodes forward surge current failure mechanisms : experiment and simulationUdal, Andres; Velmre, EnnMicroelectronics and reliability1997 / 10/11, p. 1671-1674 Simulink/MATLAB based comparison of neural and basic tracking control for an autonomous surface vessel for situation awareness applicationsAstrov, Igor; Udal, Andres; Pedai, Andrus; Sell, Raivo2019 IEEE 19th International Symposium on Computational Intelligence and Informatics and 7th IEEE International Conference on Recent Achievements in Mechatronics, Automation, Computer Sciences and Robotics (CINTI-MACRo)2019 / p. 000105 - 000110 : ill Single-Rate versus Three-Rate Neural Assisted Control Approaches for Coaxial Rotor Ducted Fan TUAV for Situation Awareness ApplicationsPedai, Andrus; Astrov, Igor; Udal, Andres; Sell, Raivo2019 IEEE International Systems Conference (SysCon 2019), Orlando, FL, USA, April 8-11, 20192019 / p. 457−463 : ill https://doi.org/10.1109/SYSCON.2019.8836871 Smart elevator with unsupervised learning for visitor profiling and personalised destination predictionLeier, Mairo; Riid, Andri; Alumäe, Tanel; Pihlak, Rene; Udal, Andres; Heinsar, Risto; Vainküla, Sven2021 IEEE International Conference on Cognitive and Computational Aspects of Situation Management (CogSIMA) : Virtual Conference, 14-22 May 2021 : proceedings2021 / p. 9-16 https://doi.org/10.1109/CogSIMA51574.2021.9475921 Spectral properties of incoherent terahertz torch based on parabolic Ga(As,Bi)/AlGaAs quantum wellsKaraliunas, Mindaugas; Pagalys, Justas; Jakštas, Vytautas; Norkus, Ričardas; Urbanowicz, Andrzej; Devenson, Jan; Devenson, Renata; Udal, Andres; Valušis, GintarasTerahertz Emitters, Receivers, and Applications X : SPIE Optical Engineering + Applacations, 11-15 August 2019, San Diego, California, United States : proceedings SPIE digital library2019 https://doi.org/10.1117/12.2528428 Conference proceeding at Scopus Article at Scopus Article at WOS Student behavior changes in Estonia revealed by e-learning technologyUdal, Andres; Kukk, Vello; Jaanus, Martin; Umbleja, Kadri; Piho, GunnarDigital Turn in Schools - Research, Policy, Practice : proceedings of ICEM 2018 Conference2019 / p. 83-90 https://doi.org/10.1007/978-981-13-7361-9_6 Conference proceedings at Scopus Article at Scopus Article at WOS Study of radiative recombination influence in GaN and GaAs bipolar transistor structuresVelmre, Enn; Udal, Andres; Verbitski, IrinaBEC 2004 : proceedings of the 9th Biennial Baltic Electronics Conference : October 3-6, 2004, Tallinn, Estonia2004 / p. 59-62 : ill TalTech osaleb esimese Eesti ülikoolina Euroopa Kaitsefondi projektisgeenius.ee2023 TalTech osaleb esimese Eesti ülikoolina Euroopa Kaitsefondi projektis Target tracking by neural predictive control of autonomous surface vessel for environment monitoring and cargo transportation applicationsAstrov, Igor; Udal, Andres; Roasto, Indrek; Mõlder, Heigo2020 17th Biennial Baltic electronics conference, Tallinn, Estonia, October 6-8, 2020 : proceedings2020 / 4 p https://doi.org/10.1109/BEC49624.2020.9277115 Task-based mobile learning ISC-system: built-in Coronavirus immunity confirmedUdal, Andres; Jaanus, Martin; Piho, GunnarEducating Engineers for Future Industrial Revolutions : Proceedings of the 23rd International Conference on Interactive Collaborative Learning (ICL2020). Volume 22021 / p. 604-616 https://doi.org/10.1007/978-3-030-68201-9_59 Article collection metrics at Scopus Article at Scopus Article at WOS Taskukohane spordikeskus ohusUdal, AndresEesti Päevaleht2000 / 20. jaan., lk. 4 Tehnikaülikooli teadlased lähevad Euroopale appi – kuidas tuvastada biorelvi senisest kiiremini?postimees.ee novaator.err.ee2023 Tehnikaülikooli teadlased lähevad Euroopale appi – kuidas tuvastada biorelvi senisest kiiremini? Eesti teadlased asuvad otsima võimalust keemia- ja biorelvade tuvastamiseks The experimental results of reverse recovery effects in power fastrecovery diodes analyzed by numerical modelVelmre, Enn; Udal, Andres; Vaher, G.T.; Tarma, MatiProceedings International AEGEAN Conference on Electrical Machines and Power Electronics, Kusadasi 27-29 May, 19921992 / p. 738-743: fig The method of quantum optical communication based on entangled photon pairsUdal, Andres; Jaanus, Martin; Umbleja, Kadri; Reeder, ReenoBEC 2014 : 2014 14th Biennial Baltic Electronics Conference : proceedings of the 14th Biennial Baltic Electronics Conference : Tallinn University of Technology, October 6-8, 2014, Tallinn, Estonia2014 / p. 33-36 : ill Thermopower measurements in 4H-SiC and theoretical calculations considering the phonon drag effectGrivickas, V.; Stölzer, M.; Velmre, Enn; Udal, Andres; Grivickas, P.; Syväjärvi, M.; Yakimova, R.; Bikbajevas, V.Silicon Carbide and Related Materials : ECSCRM2000 : proceedings of the 3rd European Conference on Silicon Carbide and Related Materials : Kloster Banz, Germany, September 20002001 / p. 491-494 : ill https://www.researchgate.net/publication/240833914_Thermopower_Measurements_in_4H-SiC_and_Theoretical_Calculations_Considering_the_Phonon_Drag_Effect Thermopower measurements in 4H-SiC and Theoretical calculations considering the phonon drag effectGrivickas, V.; Stölzer, M.; Velmre, Enn; Udal, Andres; Grivickas, P.; Syväjärvi, M.; Yakimova, R.; Bikbajevas, V.Abstracts of the 3rd European Conference on Silicon Carbide and Related Materials : ECSCRM'2000 : Sept. 3-7, 2000, Kloster Banz, Germany2000 / p. 144 A trajectory control method for a strongly underactuated spherical underwater surveillance robotAstrov, Igor; Udal, Andres; Mõlder, Heigo2021 IEEE 25th International conference on intelligent engineering systems (INES), 7-9 July 2021 : conference proceedings2021 / p. 43–48 https://doi.org/10.1109/INES52918.2021.9512931 Two-dimensional nonisothermal analysis of the current crowding effect at nonuniform SiC Schottky contacts using device simulator DYNAMIT-2DTKurel, Raido; Udal, AndresBEC 2002 : proceedings of the 8th Biennial Baltic Electronics Conference : October 6-9, 2002, Tallinn, Estonia2002 / p. 51-54 : ill Two-dimensional surge current modeling of packaged power devicesUdal, Andres; Freidin, Boris; Velmre, EnnThe Bug Exterminator : a monthly publication of Silvaco International1992 / 12, p. 6-7 Ultra-fast turn-on medium power thyristorVaher, G.; Udal, Andres; Typpö, J.; Paomets, V.; Sivonen, M.BEC : Baltic Electronics Conference : proceedings of the 4th Biennial Conference, October 9-14, 1994, Tallinn (Estonia). 21994 / p. 567-572: ill https://www.ester.ee/record=b2150914*est Ultra-fast-turn-on medium power double thyristorVaher, G.; Udal, Andres; Sivonen, M.; Paomets, V.ESSDERC'95 : proceedings of the 25th European Solid State Device Research Conference, the Netherlands Congress Centre, the Hague, the Netherlands, 25th-27th September 19951995 / p. 647-650: ill USB audio chip based oscilloscope and signal generator for mobile laboratoriesJaanus, Martin; Udal, AndresICSES 2012 : September 18–21, 2012, Wrocław, Poland : the conference proceedings2012 / [4 p.] : ill https://ieeexplore.ieee.org/document/6382229 Using microcontrollers for high accuracy analogue measurementsJaanus, Martin; Udal, Andres; Kukk, Vello; Umbleja, KadriElektronika ir elektrotechnika = Electronics and electrical engineering2013 / p. 51-54 : ill Wind force model and adaptive control of catamaran model sailboatAstrov, Igor; Udal, Andres; Mõlder, Heigo; Jalakas, Tanel; Möller, Taavi2022 8th International Conference on Automation, Robotics and Applications, ICARA 20222022 / p. 202-208 : ill https://doi.org/10.1109/ICARA55094.2022.9738524 Би-одномерное численное моделирование запираемых тиристоровUdal, AndresЧисленные методы и средства проектирования и испытания элементов твердотельной электроники : тезисы докладов республиканского совещания. Том I = Tahkekeha elektroonika elementide projekteerimise ja katsetamise numbrilised meetodid ja vahendid : Vabariikliku nõupidamise ettekannete teesid. Köide I1989 / с. 146-149 : ил https://www.ester.ee/record=b1272248*est Двумерное неизотермическое численное моделирование процесса выключения запираемого тиристораUdal, AndresЧисленные методы и средства проектирования и испытания элементов РЭА : тезисы докладов. Том 11987 / с. 139-142 : ил https://www.ester.ee/record=b1273986*est Двумерное численное моделирование процесса выключения запираемого тиристораUdal, AndresИзмерение и моделирование в электронике1987 / с. 65-77 Двумерное численное моделирование физических процессов в силовой транзисторный структуреKõverik, Kait; Udal, AndresЧисленные методы и средства проектирования и испытания элементов РЭА : тезисы докладов. Том 11987 / с. 135-138 : ил https://www.ester.ee/record=b1273986*est Инжекционные зависимости времени жизни неосновных носителей заряда в кремнии, легированном золотом и платинойUdal, AndresСиловые быстродействующие полупроводниковые приборы : сборник статей. Часть II1989 / с. 101-105 : ил., табл https://www.ester.ee/record=b1264433*est Исследование динамических характеристик силовых высоковольтных транзисторовKõverik, Kait; Rudski, V.A.; Udal, AndresТезисы докладов Республиканской научно-технической конференции, посвященной Дню радио, октябрь 1983. Секция "Силовые полупроводниковые приборы"1983 / с. 18-21 https://www.ester.ee/record=b1295312*est Исследование процесса выключения запираемого тиристора с помощью двумерной численной моделиUdal, AndresСиловые быстродействующие полупроводниковые приборы : сборник статей. Часть II1989 / с. 106-110 : ил https://www.ester.ee/record=b1264433*est Исследование процесса переключения диодных структур низковольтных диодов с эпитаксиальной базовой областьюVaher, G.; Velmre, Enn; Lumi, J.; Tarma, Mati; Udal, AndresПолупроводниковые приборы : сборник статей1982 / с. 13-17 https://www.ester.ee/record=b1356516*est Исследование эффективности численных алгоритмов моделирования силовых полупроводниковых структур в проводящем состоянииVelmre, Enn; Udal, Andres; Freidin, BorisЭлектронное моделирование = Electronic modeling : международный научно-теоретический журнал1981 / c. 85-88 https://www.ester.ee/record=b1291241*est О влиянии электронно-упрочного рассеяния на коэффициент передачи лико микроэлектронного биполярного транзистораVelmre, Enn; Udal, AndresМатематическое моделирование физических процессов в полупроводниках и полупроводниковых приборах : тезисы докладов II всесоюзного совещания (г. Ярославль, сентябрь 1988 г.)1988 / с. 40 Определение характеристик силовых диодных структур методом фотохронографии рекомбинационного излученияKruusing, Arvi; Udal, Andres; Vaher, G.Силовые быстродействующие полупроводниковые приборы : сборник статей. Часть II1989 / с. 129-133 https://www.ester.ee/record=b1264433*est Приближенная теория для расчета характеристик обратного восстановления высоковольтных диффузионных диодов в индуктивных цепяхUdal, AndresСиловые полупроводниковые приборы : сборник статей1986 / с. 54-58 : ил https://www.ester.ee/record=b1591355*est Применение численных моделей для усовершенствования технологии производства силовых полупроводниковых приборовVelmre, Enn; Udal, Andres; Freidin, BorisСистемы автоматизированного проектирования изделий микроэлектроники, новые методы и технологии микроминиатюрных элементов : Сборник докладов постоянно действующего семинара "Современная технология производства приборов, средств автоматизации и систем управления"1981 / с. 51-56 Применение численных моделей при разработке полупроводниковых приборов и технологии их изготовленияVelmre, Enn; Udal, Andres; Freidin, BorisСистемы автоматизированного проектирования изделий микроэлектроники, новые методы и технологии микроминиатюрных элементов : Сборник докладов постоянно действующего семинара "Современная технология производства приборов, средств автоматизации и систем управления"1981 / с. 51-56 Проблемы оптимизации аксиального профиля времени жизни носителей заряда в структуре быстродействующего тиристораSurma, A.; Udal, Andres; Assina, SvetlanaСиловые быстродействующие полупроводниковые приборы : сборник статей. Часть II1989 / с. 18-21 : ил https://www.ester.ee/record=b1264433*est Программа "Динамит-1" для одномерного численного моделирования тиристорных структурVelmre, Enn; Udal, AndresСиловые полупроводниковые приборы : сборник статей1986 / с. 59-63 : ил https://www.ester.ee/record=b1591355*est Расчет и оптимизация параметров запираемых тиристоров с учетом внешней цепиКуузик Э.И.; Кыверик К.Х.; Свирин А.В.; Udal, AndresAutomation, simulation & measurement : ASM'91 : 3rd biennal conference, Tallinn, October 7-11, 1991. Section S / Tallinn Technical University1992 / с. 184-199: ил Расчет и оптимизация параметров запирасных тиристоров с учетом внешней цепиKuusik, E.; Kõverik, Kait; Svirin, A.V.; Udal, AndresСиловая полупроводниковая техника и ее применение в народном хозяйстве : (Тезисы докладов)1989 / c. 30 Численное моделирование диода шоттки на ЭВМRang, Toomas; Udal, AndresПроблемы моделирования полупроводниковых структур и сложных схем на ЭВМ1982 / с. 21-31 Численное моделирование диодных структур с учетом Оже-рекомбинации и фотогенерацииUdal, AndresПроблемы моделирования полупроводниковых структур и сложных схем на ЭВМ1982 / с. 3-20 Численное моделирование мощных диодов Шоттки на ЭВМRang, Toomas; Udal, AndresИзвестия высших учебных заведений : международный ежемесячный научно-технический журнал. Радиоэлектроника1983 / с. 92-93 https://www.ester.ee/record=b2768571*est Численное моделирование процесса выключения одномерных кремниевых тиристорных структурVelmre, Enn; Udal, AndresПолупроводниковые приборы : сборник статей1982 / с. 74-79 https://www.ester.ee/record=b1356516*est Численное моделирование процессов в полупроводниковых структурах с учетом рекомбинации через многозарядные центрыVelmre, Enn; Opštški, A.; Udal, AndresЧисленные методы и средства проектирования и испытания элементов РЭА : тезисы докладов. Том 11987 / с. 131-134 https://www.ester.ee/record=b1273986*est Численное моделирование статических неизотермических процессов в кремниевых силовых диодных и тиристорных структурах в открытом состоянииVelmre, Enn; Udal, Andres; Freidin, BorisВсесоюзный научно-технический семинар "Повышение параметров силовых полупроводниковых приборов на основе новых конструктивных решений и методов изготовления" (Запорожье, 1981)1981 / с.37-38 Численное моделирование физических процессов в одномерных кремниевых диодных структурах в стационарном режимеVelmre, Enn; Freidin, Boris; Udal, AndresАлгоритмы и программы : информационный бюллетень1980 / с.? Численное моделирование эксперимента Шокли-ХейнсаVelmre, Enn; Udal, AndresСиловые полупроводниковые приборы : сборник статей1986 / с. 49-53 : ил https://www.ester.ee/record=b1591355*est Численное моделирование электрофизических процессов в полупроводниках с учетон электронно-дырочного рассеянияVelmre, Enn; Piroženko, Aleksander; Udal, AndresЭлектронное моделирование = Electronic modeling : международный научно-теоретический журнал1985 / с. 66-71 https://www.ester.ee/record=b1291241*est Численный расчет диода с точным учётом электронно-дырочного рассеянияVelmre, Enn; Udal, AndresСиловые быстродействующие полупроводниковые приборы : сборник статей1984 / с. 39-43 https://www.ester.ee/record=b1238033*est Электротехника и автоматикаTamm, Uljas; Udal, Andres; Rang, Toomas; Freidin, Boris; Velmre, Enn; Nurste, Ivar; Laansoo, Ants; Männama, Vello; Järvalt, Aldur; Gurjanov, Boris; Pikkov, Otto; Rebane, Jüri; Aarna, Olav; Teder, Toomas1982 https://www.ester.ee/record=b1339926*est Электротехника и автоматикаKukk, Vello; Tamm, Uljas; Pikkov, Otto; Min, Mart; Velmre, Enn; Udal, Andres; Nurste, Ivar; Freidin, Boris; Rang, Toomas; Opotski, Aleksei; Laansoo, Ants; Männama, Vello; Järvalt, Aldur; Gurjanov, Boris; Lavrov, Mihhail; Belkina, I.I.; Plakk, Paul; Plakk, Peeter; Plakk, T.1987 https://www.ester.ee/record=b1224910*est Эффективный алгоритм для одномерного численного моделирования полупроводниковых структурUdal, AndresЧисленные методы и средства проектирования и испытания элементов РЭА : тезисы докладов. Том 11987 / с. 146-149 https://www.ester.ee/record=b1273986*est