Kari Hjelt

Verified @gmail.com

Chalmers Industriteknik

Kari Hjelt


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https://researchid.co/kthjelt

RESEARCH INTERESTS

Graphene
2442

Scholar Citations

20

Scholar h-index

29

Scholar i10-index

RECENT SCHOLAR PUBLICATIONS

  • The commercialization of graphene electronics
    K Hjelt, H Döscher
    Nature Electronics 7 (10), 844-846 , 2024
    2024
    Citations: 10
  • Photoluminescence of AgInSe2
    K Hjelt, J Krustokb, M Yakushev, H Collan, AE Hill, RD Tomlinson
    Ternary and Multinary Compounds, 441-444 , 2020
    2020
    Citations: 7
  • Graphene is on track to deliver on its promises
    T Reiß, K Hjelt, AC Ferrari
    Nature nanotechnology 14 (10), 907-910 , 2019
    2019
    Citations: 111
  • System and method for interactive distribution of digital content
    JO HEIKEL, TI KANNAS, TJ Mattila, OH PALOHEIMO, KT Hjelt, R Rikkola
    US Patent 9,626,016 , 2017
    2017
    Citations: 7
  • Dynamically configurable balancing board
    K Hjelt, S Keronen
    US Patent 9,044,634 , 2015
    2015
    Citations: 28
  • Mobile electronic system
    S Naukkarinen, T Ryhänen, K Hjelt, K Inha
    US Patent 8,401,571 , 2013
    2013
    Citations: 34
  • Sensing arrangement
    T Ryhänen, K Hjelt
    US Patent 7,813,534 , 2010
    2010
    Citations: 73
  • Arrangement for authentication of a person
    T Ryhänen, K Hjelt
    US Patent 7,606,400 , 2009
    2009
    Citations: 90
  • Acceleration sensor
    K Hjelt, T Ryhanen, S Silanto, J Salminen
    US Patent 7,350,424 , 2008
    2008
    Citations: 34
  • System, method and computer program product for managing physiological information relating to a terminal user
    K Hjelt, S Naukkarinen, J Nihtilä, T Ryhänen, T Vitikainen
    US Patent 7,278,966 , 2007
    2007
    Citations: 390
  • Body fat monitoring system and method employing mobile terminal
    K Hjelt, K Nybergh, J Hyyryläinen, T Ryhänen, S Naukkarinen
    US Patent 7,103,407 , 2006
    2006
    Citations: 100
  • Terminal and associated method and computer program product for monitoring at least one activity of a user
    K Hjelt, J Friman, J Jarvi, S Naukkarinen, J Ollikainen
    US Patent App. 10/871,176 , 2005
    2005
    Citations: 464
  • System and method for implementing sensor functionality in mobile devices
    K Hjelt, S Naukkarinen, T Ryhanen, J Sairanen, J Salminen, S Silanto, ...
    US Patent App. 10/607,832 , 2004
    2004
    Citations: 122
  • Apparatus for measuring a small quantity of a liquid
    MJ Vellekoop, KT Hjelt, GW Lubking
    US Patent 6,796,174 , 2004
    2004
  • Touch detection system for mobile terminals
    J Mäntyjärvi, K Nybergh, J Himberg, K Hjelt
    International Conference on Mobile Human-Computer Interaction, 331-336 , 2004
    2004
    Citations: 13
  • Measuring liquid volumes in subnanoliter wells
    IT Young, KH Hjelt, LR van den Doel, MJ Vellekoop, LJ van Vliet
    Biomedical Instrumentation Based on Micro-and Nanotechnology 4265, 75-80 , 2001
    2001
    Citations: 4
  • Nanoliter droplet behavior in micromachined wells
    KT Hjelt, GW Lubking, MJ Vellekoop, LJ van Vliet, LR van den Doel, ...
    Sensors Update 8 (1), 39-70 , 2000
    2000
    Citations: 2
  • Nanometer-scale height measurements in micromachined picoliter vials based on interference fringe analysis
    LR Van den Doel, LJ van Vliet, KT Hjelt, MJ Vellekoop, F Gromball, ...
    Proceedings 15th International Conference on Pattern Recognition. ICPR-2000 … , 2000
    2000
    Citations: 45
  • Measuring liquid evaporation from micromachined wells
    KT Hjelt, R van den Doel, W Lubking, MJ Vellekoop
    Sensors and Actuators A: Physical 85 (1-3), 384-389 , 2000
    2000
    Citations: 27
  • High-resolution liquid volume detection in sub-nanoliter reactors
    KT Hjelt, R van den Doel, W Lubking, MJ Vellekoop
    Sensors and Actuators A: Physical 83 (1-3), 61-66 , 2000
    2000
    Citations: 17

MOST CITED SCHOLAR PUBLICATIONS

  • Terminal and associated method and computer program product for monitoring at least one activity of a user
    K Hjelt, J Friman, J Jarvi, S Naukkarinen, J Ollikainen
    US Patent App. 10/871,176 , 2005
    2005
    Citations: 464
  • System, method and computer program product for managing physiological information relating to a terminal user
    K Hjelt, S Naukkarinen, J Nihtilä, T Ryhänen, T Vitikainen
    US Patent 7,278,966 , 2007
    2007
    Citations: 390
  • Does the low-temperature Arrhenius plot of the photoluminescence intensity in CdTe point towards an erroneous activation energy?
    J Krustok, H Collan, K Hjelt
    Journal of applied physics 81 (3), 1442-1445 , 1997
    1997
    Citations: 285
  • The role of spatial potential fluctuations in the shape of the PL bands of multinary semiconductor compounds
    J Krustok, H Collan, M Yakushev, K Hjelt
    Physica Scripta 1999 (T79), 179-182 , 1999
    1999
    Citations: 180
  • System and method for implementing sensor functionality in mobile devices
    K Hjelt, S Naukkarinen, T Ryhanen, J Sairanen, J Salminen, S Silanto, ...
    US Patent App. 10/607,832 , 2004
    2004
    Citations: 122
  • Graphene is on track to deliver on its promises
    T Reiß, K Hjelt, AC Ferrari
    Nature nanotechnology 14 (10), 907-910 , 2019
    2019
    Citations: 111
  • Body fat monitoring system and method employing mobile terminal
    K Hjelt, K Nybergh, J Hyyryläinen, T Ryhänen, S Naukkarinen
    US Patent 7,103,407 , 2006
    2006
    Citations: 100
  • Arrangement for authentication of a person
    T Ryhänen, K Hjelt
    US Patent 7,606,400 , 2009
    2009
    Citations: 90
  • Deep center luminescence in p ‐type CdTe
    J Krustok, V Valdna, K Hjelt, H Collan
    Journal of applied physics 80 (3), 1757-1762 , 1996
    1996
    Citations: 89
  • Photoluminescence of Cd 1—x Zn x Te Crystals Grown by High‐Pressure Bridgman Technique
    K Hjelt, M Juvonen, T Tuomi, S Nenonen, EE Eissler, M Bavdaz
    physica status solidi (a) 162 (2), 747-763 , 1997
    1997
    Citations: 86
  • Sensing arrangement
    T Ryhänen, K Hjelt
    US Patent 7,813,534 , 2010
    2010
    Citations: 73
  • Nanometer-scale height measurements in micromachined picoliter vials based on interference fringe analysis
    LR Van den Doel, LJ van Vliet, KT Hjelt, MJ Vellekoop, F Gromball, ...
    Proceedings 15th International Conference on Pattern Recognition. ICPR-2000 … , 2000
    2000
    Citations: 45
  • Mobile electronic system
    S Naukkarinen, T Ryhänen, K Hjelt, K Inha
    US Patent 8,401,571 , 2013
    2013
    Citations: 34
  • Acceleration sensor
    K Hjelt, T Ryhanen, S Silanto, J Salminen
    US Patent 7,350,424 , 2008
    2008
    Citations: 34
  • Photoluminescence from deep acceptor-deep donor complexes in CdTe
    J Krustok, H Collan, K Hjelt, J Mädasson, V Valdna
    Journal of luminescence 72, 103-105 , 1997
    1997
    Citations: 34
  • Dynamically configurable balancing board
    K Hjelt, S Keronen
    US Patent 9,044,634 , 2015
    2015
    Citations: 28
  • Photoluminescence and photoluminescence excitation study of
    J Krustok, H Collan, K Hjelt, M Yakushev, AE Hill, RD Tomlinson, ...
    Journal of applied physics 83 (12), 7867-7872 , 1998
    1998
    Citations: 28
  • Measuring liquid evaporation from micromachined wells
    KT Hjelt, R van den Doel, W Lubking, MJ Vellekoop
    Sensors and Actuators A: Physical 85 (1-3), 384-389 , 2000
    2000
    Citations: 27
  • 1.4 eV photoluminescence in chlorine-doped polycrystalline CdTe with a high density of defects
    J Krustok, J Madasson, K Hjelt, H Collan
    Journal of materials science 32 (6), 1545-1550 , 1997
    1997
    Citations: 23
  • Fluorescence detection in (sub-) nanoliter microarrays
    LR van den Doel, MJ Vellekoop, PM Sarro, S Picioreanu, R Moerman, ...
    Micro-and Nanofabricated Structures and Devices for Biomedical Environmental … , 1999
    1999
    Citations: 21