Sökning: "mobility devices"

Visar resultat 16 - 20 av 262 avhandlingar innehållade orden mobility devices.

1. 16. Charge Transport in Single-crystalline CVD Diamond

   Författare :Markus Gabrysch; Jan Isberg; Mats Leijon; Milos Nesladek; Uppsala universitet; []
   Nyckelord :CVD diamond; wide-bandgap semiconductor; single-crystalline diamond; carrier transport; time-of-flight; drift velocity; mobility; compensation; pair-creation; electronic devices; diamond detector; diamond diode;

   Sammanfattning : Diamond is a semiconductor with many superior material properties such as high breakdown field, high saturation velocity, high carrier mobilities and the highest thermal conductivity of all materials. These extreme properties, as compared to other (wide bandgap) semiconductors, make it desirable to develop single-crystalline epitaxial diamond films for electronic device and detector applications. LÄS MER

3. 17. Performance Analysis of Opportunistic Content Distribution via Data-Driven Mobility Modeling

   Författare :Ljubica Pajevic; Viktória Fodor; Thrasyvoulos Spyropoulos; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Opportunistic communication; mobility; content distribution; network performance modeling; trace-collection analysis; stochastic models.; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : An opportunistic network is formed by co-located mobile users in order to exchange data via direct wireless links when their devices are within transmission range, without relying on the use of fixed network infrastructure. In this thesis we investigate the capabilities of opportunistic networks and cover two main areas: data-driven modeling of user mobility and analytic performance evaluation of location-aware opportunistic content distribution. LÄS MER

4. 18. Exploring Opportunistic Use of Mobile Devices for Studying in Higher Education

   Författare :Hedin Björn; Stefan Hrastinski; Olle Bälter; Daniel Pargman; Urban Nuldén; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mobile learning; e-learning; mobility; atudying; higher education; Media Technology; Medieteknik;

   Sammanfattning : Students today often feel that they have too much to do and too little time. A common strategy to remedy this is to take advantage of opportunities to use “inter-time”, the time between other activities such as waiting or traveling. LÄS MER

5. 19. Noise Aspects of some Si-based One Port Devices and Carbon Nanotubes

   Författare :Hassan Ouacha; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; etching; Schottky contacts; noise; fluctuations; generation; mobility; noise spectroscopy; recombination; p-n diodes; carbon nanotubes; thermal reaction; junction; defects; co-sputtering; irradiation; interface states; low frequency noise;

   Sammanfattning : The p-n junctions and Schottky diodes based on Si1-xGex and SiC are of great importance in modern electronic applications, such as microwave detectors and mixers. Carbon nanotubes (CNTs) have appeared recently as an attractive new class of materials with a reduced dimensionality, and proposed as building blocks for nanoelectronic technology. LÄS MER

7. 20. Understanding Human Mobility with Emerging Data Sources: Validation, spatiotemporal patterns, and transport modal disparity

   Författare :Yuan Liao; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; travel mode; data mining; travel time; mobility; social media data; gravity model; Twitter; geographical information systems;

   Sammanfattning : Human mobility refers to the geographic displacement of human beings, seen as individuals or groups, in space and time. The understanding of mobility has broad relevance, e.g., how fast epidemics spread globally. LÄS MER