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Visar resultat 1 - 5 av 11 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Improving the Energy Efficiency of Cellular IoT Device

   Författare :Muhammad Tahir Abbas; Karl-Johan Grinnemo; Johan Eklund; Mohammad Rajiullah; Stefan Alfredsson; Peter Sjödin; Karlstads universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CIoT; 3GPP; energy saving; mMTC; NB-IoT; LTE-M; EC-GSM- IoT; Computer Science; Datavetenskap;

   Sammanfattning : Cellular Internet of Things (CIoT) has emerged as a promising technology to support applications that generate infrequent data. One requirement on these applications, often battery-powered devices, is low energy consumption to enable extended battery life. LÄS MER

3. 2. System Design for Opportunistic Networks

   Författare :Sylvia T. Kouyoumdjieva; Gunnar Karlsson; Andrea Passarella; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; opportunistic communication; system design; mobility; energy-saving mechanisms; device-to-device communication; mobile data offloading; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : Device-to-device communication has been suggested as a complement to traditional cellular networks as a means of offloading cellular traffic. In this thesis we explore a solution for device-to-device communication based on opportunistic content distribution in a content-centric network. LÄS MER

4. 3. Photoemission and Characterization of Neutrophils and Nanoparticles : Energy Mapping and Elemental Composition with sub-µm Resolution

   Författare :Andreas Skallberg; Kajsa Uvdal; Christelle Prinz; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : Imaging and visualization of cells and tissues are important when studying various biological phenomena. The ability to provide spatial information with molecular and chemical specificity may increase our insight and understanding of biological problems within life sciences. LÄS MER

5. 4. Sustainable Business Innovation of Photovoltaic Water Pumping Systems

   Författare :Chi Zhang; Jinyue Yan; Per Alvfors; Bin Chen; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; PV water pumping; Economic assessment; Ecological benefits; Business model innovation; Case study; Chemical Engineering; Kemiteknik;

   Sammanfattning : The development of renewable energy technology provides an effective approach to replace fossil fuels for greenhouse gas (GHG) emission. Technological innovation and transfer are the main driving forces in promoting renewable energy usage, because of the better efficiency and economic payback under an emission reduction target. LÄS MER

7. 5. Quality of Experience on Smartphones : Network, Application, and Energy Perspectives

   Författare :Selim Ickin; Blekinge Tekniska Högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; QoE; QoS; Energy; Mobile computing;

   Sammanfattning : Smartphones have become crucial enablers for users to exploit online services such as learning, leisure, communicating, and socializing. The user-perceived quality of applications and services is an important factor to consider, in order to achieve lean resource management, to prevent user churn and revenue depletion of service or network providers. LÄS MER