Accurate dialysis dose evaluation and extrapolation algorithms during online optical dialysis monitoringFridolin, Ivo; Karai, Deniss; Kostin, Sergei; Ubar, Raimund-JohannesIEEE transactions on biomedical engineering2013 / p. 1371-1377 : ill Activity classification for real-time wearable systems : effect of window length, sampling frequency and number of features on classifier performanceAllik, Ardo; Pilt, Kristjan; Karai, Deniss; Fridolin, Ivo; Leier, Mairo; Jervan, Gert2016 IEEE EMBS Conference on Biomedical Engineering and Sciences (IECBES) : Kuala Lumpur, 4-8 December 20162016 / p. 460-464 : ill https://doi.org/10.1109/IECBES.2016.7843493 Analyse of T-wave morphology for discrimination of life threatening arrhytmias - preliminary studyOlli, Ülle; Karai, Deniss; Lass, Jaanus; Kaik, Jüri; Vainu, MeelisMedicon 2001 : IX Mediterranean Conference on Medical and Biological Engineering and Computing : June 12-15, 2001, Pula, Croatia : [proceedings]. Part I2001 / p. 344-347 Application of novel QT interval correction and QT/RR assessment models to ECG 24-hour recordings in cardiac patientsVeski, Kristi; Karai, Deniss; Pilt, Kristjan; Meigas, Kalju; Kaik, JüriEstonian journal of engineering2010 / 1, p. 107-120 : ill Arterial hypertension, left ventricular geometry and QT dispersion in a middle-aged Estonian female populationShipilova, Tatjana; Pšenitšnikov, Igor; Kaik, Jüri; Volozh, Olga; Abina, Jelena; Kalev, Maie; Lass, Jaanus; Karai, DenissBlood pressure2003 / 1, p. 12-18 Arterial pulse waveform dependence on applied pressurePilt, Kristjan; Meigas, Kalju; Viigimaa, Margus; Kaik, Jüri; Kattai, Rain; Karai, DenissBEC 2010 : 2010 12th Biennial Baltic Electronics Conference : proceedings of the 12th Biennial Baltic Electronics Conference : Tallinn University of Technology, October 4-6, 2010, Tallinn, Estonia2010 / p. 277-280 : ill Association between ventricular repolarization and main cardiovascular risk factorsPšenitšnikov, Igor; Šipilova, Tatjana; Karai, Deniss; Riipulk, Jevgeni; Veski, Kristi; Pilt, Kristjan; Kaik, JüriScandinavian cardiovascular journal : SCJ2011 / p. 33-40 : ill Blood groups, blood pressure and left ventricular geometry in womenShipilova, Tatjana; Pšenitšnikov, Igor; Volozh, Olga; Abina, Jelena; Kalev, Maie; Kaik, Jüri; Lass, Jaanus; Karai, DenissJournal of hypertension2002 / p. 20 Calculation of pulse wave transit time and its correlation with blood pressure using different physiological signals [Electronic resource]Meigas, Kalju; Lass, Jaanus; Kattai, Rain; Karai, Deniss; Kaik, JüriProceedings of World Congress on Medical Physics and Biomedical Engineering, Sidney, Australia, 20032003 / [4] p. [CD-ROM] Classification algorithm improvement for physical activity recognition in maritime environmentsAllik, Ardo; Pilt, Kristjan; Karai, Deniss; Fridolin, Ivo; Leier, Mairo; Jervan, GertWorld Congress on Medical Physics and Biomedical Engineering 2018 : June 3–8, 2018, Prague, Czech Republic (Vol. 3)2019 / p. 13-17 https://doi.org/10.1007/978-981-10-9023-3_3 Conference proceeding Article at Scopus Article at WOS Comparison of different ventricular repolarisation phases from ECG for identifying patents with increased risk of sudden cardiac deathLass, Jaanus; Kaik, Jüri; Karai, Deniss; Hinrikus, Hiie; Vainu, MeelisIV International Workshop on Biosignal Interpretation : BSI2002, Como, Italy, 24th-26th June, 2002 : proceedings2002 / p. 393-396 : ill Comparison of predictive equations for basal metabolic rateAllik, Ardo; Mägi, Siiri; Pilt, Kristjan; Karai, Deniss; Fridolin, Ivo; Leier, Mairo; Jervan, GertWireless Mobile Communication and Healthcare : 7th International Conference, MobiHealth 2017, Vienna, Austria, November 14–15, 2017 : proceedings2018 / p. 261-264 : ill https://doi.org/10.1007/978-3-319-98551-0 Conference Proceedings at Scopus Article at Scopus Article at WOS Continuous blood pressure monitoring during exercise using pulse wave transit time measurementLass, Jaanus; Meigas, Kalju; Karai, Deniss; Kattai, Rain; Kaik, Jüri; Rossmann, MartProceedings of the 26th Annual International Conference of the IEEE EMBC : San Francisco, CA, USA, September 1-5, 20042004 / p. 2239-2242 : ill Device for continuous blood pressure measurementsMeigas, Kalju; Lass, Jaanus; Karai, Deniss; Kattai, Rain; Kaik, JüriNBC'05 UMEA : 13th Nordic Baltic Conference on Biomedical Engineering and Medical Physics : June 13th-17th, 2005, Umea, Sweden2005 / p. 164-165 : ill Effect of microwave radiation on human EEG at two different levels of exposureSuhhova, Anna; Bachmann, Maie; Karai, Deniss; Lass, Jaanus; Hinrikus, HiieBioelectromagnetics2012 / 11 p. : ill Electroencephalography as an objective indicator of stressGavriljuk, Marietta; Uudeberg, Tuuli; Pilt, Kristjan; Karai, Deniss; Fridolin, Ivo; Bachmann, Maie19th Nordic-Baltic Conference on Biomedical Engineering and Medical Physics : Proceedings of NBC 2023, June 12–14, 2023, Liepaja, Latvia2023 / p. 221–226 https://doi.org/10.1007/978-3-031-37132-5_28 Fall detection and activity recognition system for usage in smart work-wear [Online resource]Leier, Mairo; Jervan, Gert; Allik, Ardo; Pilt, Kristjan; Karai, Deniss; Fridolin, IvoBEC 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.2018.8600959 Health risks to computer-workers in various indoor facilities [Electronic resource]Tint, Piia; Toomeoja, K.; Tuulik, Viiu; Karai, Deniss; Meigas, KaljuRiga Technical University 54th International Scientific Conference Scientific Conference on Economics and Entrepreneurship (SCEE’2013) : proceedings2013 / [2] p [CD-ROM] Influence of gender on the QT interval variability and duration in different wake–sleep stages in non-sleep apneic individuals : analysis of polysomnographic recordingsViigimäe, Moonika; Karai, Deniss; Pilt, Kristjan; Polo, Olli; Huhtala, Heini; Meigas, Kalju; Kaik, JüriJournal of electrocardiology2017 / p. 444-449 : ill http://dx.doi.org/10.1016/j.jelectrocard.2017.03.012 Influence of low-level microwave radiation on nerve pulse conduction velocityHinrikus, Hiie; Lass, Jaanus; Karai, Deniss; Kalda, Jaak; Tomson, Ruth; Tuulik, ViiuBiological Effects of EMFs 3rd International Workshop : Kos, Greece, 4-8 October 2004 : proceedings. Volume 22004 / p. 641-648 : ill Influence of mental stress on the arterial stiffness parameters detected from photoplethysmographic signal waveformPilt, Kristjan; Karai, Deniss; Bachmann, Maie; Gavriljuk, Marietta; Allik, Ardo; Uudeberg, Tuuli2022 18th Biennial Baltic Electronics Conference (BEC)2022 / 4 p https://doi.org/10.1109/BEC56180.2022.9935609 Investigation of photoplethysmographic signal augmentation index estimation differences between fingersPilt, Kristjan; Silluta, Sandra; Kööts, Kristina; Karai, Deniss; Meigas, Kalju; Viigimaa, MargusEMBEC & NBC 2017 : joint conference of the European Medical and Biological Engineering Conference (EMBEC) and the Nordic-Baltic Conference on Biomedical Engineering and Medical Physics (NBC), Tampere, Finland, June 20172018 / p. 819-822 : ill https://doi.org/10.1007/978-981-10-5122-7_205 Low-level microwave radiation effect on nerve pulse conduction velocityHinrikus, Hiie; Tomson, Ruth; Lass, Jaanus; Karai, Deniss; Kalda, Jaak; Tuulik, ViiuThe environmentalist2005 / 2/4, p. 157-163 Method and device for beat-to-beat blood pressure measurements [Electronic resource]Meigas, Kalju; Lass, Jaanus; Karai, Deniss; Kattai, Rain; Kaik, JüriIFMBE proceedings2005 / [6] p. [CD-ROM] Method of optical self-mixing for pulse wave transit time measurement in comparison with other methods and correlation with blood pressureMeigas, Kalju; Lass, Jaanus; Kattai, Rain; Karai, Deniss; Kaik, JüriCoherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine VIII : 26-28 January 2004, San Jose, California, USA2004 / p. 444-453 : ill Monitoring blood pressure from pulse wave transit timeTepner, Ingrid; Lass, Jaanus; Karai, Deniss; Hinrikus, Hiie; Meigas, KaljuIV International Workshop on Biosignal Interpretation : BSI2002, Como, Italy, 24th-26th June, 2002 : proceedings2002 / p. 239-242 : ill On-line monitoring of dialysis adequacy using diasens optical sensor: accurate Kt/V estimation by smoothing algorithmsTalisainen, Aleksei; Kostin, Sergei; Karai, Deniss; Fridolin, Ivo; Ubar, Raimund-JohannesBEC 2010 : 2010 12th Biennial Baltic Electronics Conference : proceedings of the 12th Biennial Baltic Electronics Conference : Tallinn University of Technology, October 4-6, 2010, Tallinn, Estonia2010 / p. 273-276 : ill Optical and electrical methods for pulse wave transit time measurement and its correlation with arterial blood pressureLass, Jaanus; Meigas, Kalju; Kattai, Rain; Karai, Deniss; Kaik, Jüri; Rossmann, MartProceedings of the Estonian Academy of Sciences. Engineering2004 / 2, p. 123-136 : ill Optimization of physical activity recognition for real-time wearable systems : effect of window length, sampling frequency and number of featuresAllik, Ardo; Pilt, Kristjan; Karai, Deniss; Fridolin, Ivo; Leier, Mairo; Jervan, GertApplied sciences2019 / art. 4833, 14 p. : ill https://doi.org/10.3390/app9224833 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Prevention of physiological and psychological stress at computer-equipped workplacesTint, Piia; Meigas, Kalju; Tuulik, Viiu; Pille, Viive; Oha, Kristel; Reinhold, Karin; Karai, Deniss; Tuulik-Leisi, Varje-Riin; Lauri, MariliisHuman factors : sustainable life and mobility : proceedings of the Human Factors and Ergonomics Society Europe Chapter 2013 Annual Conference2014 / p. 229-240 : ill Pulse wave parameters as indicators of the state of the arteriesHinrikus, Hiie; Lass, Jaanus; Karai, Deniss; Tepner, IngridProceedings of 2nd European Medical & Biological Engineering Conference EMBEC'02. 12002 / p. 642-643 QT dispersion in relation to left ventricular geometry and hypertension in a population studyPšenitšnikov, Igor; Shipilova, Tatjana; Kaik, Jüri; Volozh, Olga; Abina, Jelena; Lass, Jaanus; Karai, DenissScandinavian cardiovascular journal : SCJ2003 / 2, p. 87-90 Second derivative photoplethysmographic signal analysis of differences between fingers in healthy subjects [Online resource]Pilt, Kristjan; Silluta, Sandra; Palmar, Merlin; Karai, Deniss; Meigas, Kalju; Viigimaa, MargusBEC 2018 : 2018 16th Biennial Baltic Electronics Conference (BEC) : proceedings of the 16th Biennial Baltic Electronics Conference, October 8-10, 20182019 / 4 p.: ill https://doi.org/10.1109/BEC.2018.8600985 Smart photoplethysmographic sensor for pulse wave registration at different vascular depthsLeier, Mairo; Pilt, Kristjan; Karai, Deniss; Jervan, GertConference proceedings : 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society : Milan, Italy, August 25-29 20152015 / p. 1849-1852 : ill http://dx.doi.org/10.1109/EMBC.2015.7318741 Stability of the relationship between pulse wave delay and arterial blood pressureHinrikus, Hiie; Tepner, Ingrid; Lass, Jaanus; Karai, Deniss12th Nordic Baltic Conference on Biomedical Engineering and Medical Physics : 12NBC 2002, June 18th-22nd, Reykjavik, Iceland2002 / p. 22-23 The computer workers' working conditions influencing the health in modern buildingsTint, Piia; Karai, Deniss; Oha, Kristel; Koppel, Tarmo; Tuulik-Leisi, Varje-Riin; Tuulik, Viiu; Meigas, KaljuIntelligent Technologies in Logistics and Mechatronics Systems ITELMS'2013 : proceedings of the 8th international conference2013 / p. 247-253 : ill The working conditions of office-workers in modern buildingsTint, Piia; Karai, Deniss; Oha, Kristel; Koppel, Tarmo; Tuulik-Leisi, Varje-Riin; Tuulik, Viiu; Meigas, KaljuHuman factors : sustainable life and mobility : October 16-18, 2013, Torino, Italy : programme, abstracts book2013 / p. [64] Ventricular repolarization evaluation from surface ECG for identification of the patients with increased myocardial electrical instabilityLass, Jaanus; Kaik, Jüri; Karai, Deniss; Vainu, Meelis2001 Conference Proceedings of the 23rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society : 25-28 October 2001, Istanbul, Turkey. Vol. 12001 / p. 390-393 : ill Vähiuurimisaparaat säästab haige tervist : innovaatikamess esitles mittekiirgavat radiomeetrit : [väljapanekuid tutvustavad Hiie Hinrikus, Deniss Karai ja Arved Vain]Hinrikus, Hiie; Karai, Deniss; Vain, Arved; Väre, HansEesti Päevaleht1999 / 9. apr., lk. 5