Sökning: "mobile telephones"

Visar resultat 1 - 5 av 8 avhandlingar innehållade orden mobile telephones.

  1. 1. Speech enhancement for mobile communications

    Författare :Harald Gustafsson; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; speech enhancement; spectral subtraction;

    Sammanfattning : Three major applications of speech enhancement have been studied: noise reduction for mobile telephone handsfree accessories, noise reduction for handheld mobile telephones, and short delay noise reduction for frame-less telephone systems. During conversation, both hearing and speaking adapt to the background noise in a noisy environment. LÄS MER

  3. 2. The Invisible Landscapes : The Construction of New Subjectivities in the Era of the Mobile Telephone

    Författare :Miya Yoshida; Konsthögskolan i Malmö; []
    Nyckelord :HUMANIORA; HUMANITIES; Subjectivities; Art History; Digital Network; Mobile Telecommunication; Geopolitics; Konstvetenskap;

    Sammanfattning : The interventions of portable digital devices such as mobile telephones, mp3 players, PDAs and many others, have contributed to the formation of contemporary notions of space. The impact of these devices' mobility (informing the users' mobility) could even be paralleled to the shift from the effects of still photography to those of film in the 19th century. LÄS MER

  4. 3. Health symptoms and potential effects on the blood-brain and blood-cerebrospinal fluid barriers associated with use of wireless telephones

    Författare :Fredrik Söderqvist; Lennart Hardell; David Carpenter; Örebro universitet; []
    Nyckelord :radiofrequency fields; mobile telephone; DECT-telephone; cordless telephone; children; adolescents; well-being; choroid plexus; biomarkers; S100B; transthyretin; MEDICINE; MEDICIN; Medicine; Medicin;

    Sammanfattning : Recent years have seen a rapid increase in the use of wireless telephones, yet little systematic data exist on the actual use of such devices in the general population. Mobile and cordless telephones emit radiofrequency fields (RF) raising concern about possible adverse health effects. LÄS MER

  5. 4. Customer-oriented product development : experiments involving users in service innovation

    Författare :Peter R. Magnusson; Handelshögskolan i Stockholm; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Sammanfattning : User involvement has, during recent years, become something of a mantra among product development managers. However, the existing literature has not much to say about how the individual user contributes to product innovation and whether her or his contribution is valuable. LÄS MER

  7. 5. A Cross-Layer Perspective on Transport Protocol Performance in Wireless Networks

    Författare :Stefan Alfredsson; Anna Brunström; Christer Åhlund; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Wireless networks; 4G; cross-layer interaction; TCP; UDP; emulation; performance evaluation; optimizations; Computer Science; Datavetenskap;

    Sammanfattning : Communication by wireless technologies has seen a tremendous growth in the last decades. Mobile phone technology and wireless broadband solutions are rapidly replacing the last-hop wireline connectivity for telephones and Internet access. LÄS MER