Sökning: "blind users"

Visar resultat 1 - 5 av 31 avhandlingar innehållade orden blind users.

  1. 1. Contextualizing Accessibility : Interaction for Blind Computer Users

    Författare :Fredrik Winberg; Yngve Sundblad; Ann Lantz; Alistair Edwards; KTH; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Accessibility; contextual; blind users; auditory displays and sonification; collaboration; CSCW; working division of labour; assistive interfaces; human-computer interaction; Disability research; Handikappsforskning;

    Sammanfattning : Computer usage today is predominantly based on graphical interaction, where the visual presentation of information is essential both for input (hand-eye coordination when using a computer mouse), and output (seeing the information on a computer screen). This can create difficulties for blind computer users, both at an individual level when interacting with a computer, and also when collaborating with other computer users. LÄS MER

  3. 2. Auditory direct manipulation for blind computer users

    Författare :Fredrik Winberg; KTH; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Sammanfattning : .... LÄS MER

  4. 3. Blind Massive MIMO Base Stations : Downlink Transmission and Jamming

    Författare :Marcus Karlsson; Erik G. Larsson; Emil Björnson; Ralf Müller; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Massive MIMO (Multiple-Input--Multiple-Output) is a cellular-network technology in which the base station is equipped with a large number of antennas and aims to serve several different users simultaneously, on the same frequency resource through spatial multiplexing. This is made possible by employing efficient beamforming, based on channel estimates acquired from uplink reference signals, where the base station can transmit the signals in such a way that they add up constructively at the users and destructively elsewhere. LÄS MER

  5. 4. Non-Visual Haptic Interaction Design - Guidelines and Applications

    Författare :Calle Sjöström; Certec - Rehabiliteringsteknik och Design; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Design Guidelines; Computer access; Care and help to handicapped; vård och rehabilitering; Handikappade; Blind People; Haptics; Human-Computer Interaction;

    Sammanfattning : This dissertation has three cornerstones: * Haptics * Human-Computer Interaction (HCI) * Blind Users Haptics deals with controlling human movements and getting feedback through the sense of touch. A haptic interface transmits forces to a person’s hand or fingers in a way that mimics the sensation of touching real objects. LÄS MER

  7. 5. Combating Intersymbol Interference and Cochannel Interference in Wireless Communication Systems

    Författare :Ronnie Gustafsson; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ISI; CCI; wireless systems; beamforming; beam; simulation; fading; equalizer; channel; smart antenna; antenna array; recursive least squares RLS ; adaptive algorithms; blind algorithms;

    Sammanfattning : Over the last decade the world has witnessed explosive growth in the use of wireless mobile communications. Looking around we find users with mobile phones, wireless PDAs, pagers, MP3 players, and wireless headphones to connect to these devices - a small testament of the impact of wireless communications on our daily lives. LÄS MER