Sökning: "carrier sense"

Visar resultat 1 - 5 av 17 avhandlingar innehållade orden carrier sense.

  1. 1. Towards energy efficient protocols for active RFID

    Författare :Björn Nilsson; Högskolan i Halmstad; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; RFID; active RFID; protocol; back-off; carrier sense; energy efficient; wireless networks; active tag; energy consumption; Computer engineering; Datorteknik;

    Sammanfattning : The absence of a global standard is a bottleneck when using Radio Frequency Identification (RFID) technology. This thesis explores data communication protocols for Active-RFID regarding their energy efficiency and how they can be suited to fit a large variety of applications. LÄS MER

  3. 2. Prenatal Diagnosis of Haemophilia - psychological, social and ethical aspects

    Författare :Ulf Tedgård; Enheten för pediatrisk hematologi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; reproduction; sense of coherence; risk factors; psychological reactions; genetic counselling; chorionic villus sampling; fetal blood sampling; fetoscopy; Haemophilia; prenatal diagnosis; therapeutic abortion; follow-up study; Pediatrics; Pediatri;

    Sammanfattning : The general aim of this study has been to study the psychological, social and ethical aspects for carriers of haemophilia and their spouses, related to the development of techniques for carrier testing and for prenatal diagnosis (PD) of haemophilia. This was investigated by a semi-structured follow-up interview with 29 carriers of haemophilia with experience of PD by fetal blood sampling (FBS), and with 29 carriers (and 23 spouses) with experience of PD by chorionic villus sampling (CVS). LÄS MER

  4. 3. Utveckling av skolmiljöer - aktiviteter och mening i småskaligt arbete : Improving school environment - activities and meaning in small scale work

    Författare :Alan Schürer; Göteborgs universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; School environment; environment in a broad sense; improvement; change work process; buildings; property management; maintenance; co-operation; empirical base; participation; learning; time; feedback; information; economy; activity; meaning and small scale;

    Sammanfattning : Almost every day, Swedish media bring up issues from the school environment. Public and academic research identifies problems in these environments. Knowledge about the school environment is mainly about the conditions in schools. Less is known about how schools could work with changing their environment. LÄS MER

  5. 4. Modeling and design of multi-hop energy efficient wireless networks for control applications

    Författare :Piergiuseppe Di Marco; Karl Henrik Johansson; Sanjay Shakkottai; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Telecommunication; Telekommunikation;

    Sammanfattning :   Energy efficiency is essential for many industrial and commercial wireless network applications. In this thesis, we propose an analytical framework to model and design protocols for multi-hop wireless networks for industrial control and automation. LÄS MER

  7. 5. Atomistic Modelling of Low Dimensional Materials for Energy Harvesting and Gas Sensing Applications

    Författare :S. Rabab Naqvi; Rajeev Ahuja; Abir De Sarkar; Uppsala universitet; []
    Nyckelord :Density functional theory; Low dimensional materials; Energy harvesting; Hydrogen storage; Gas Sensing; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Sammanfattning : Energy crisis and pollution are the two biggest issues of the present times which are extremely important to address on priority. Scientists/Researchers are trying to explore and create alternate means of energy production which are sustainable and free from greenhouse emissions. LÄS MER