Kommunikation mellan två medium
… and radio waves, but also various types of modulation, such as amplitude and frequency modulation is required.
Uppsatser om frequency
699 uppsatser · sida 38 av 47
Telekrig mot bandspridningsteknik
I denna uppsats betraktas två olika bandspridningstekniker och vilken påverkan de har på telekrigsförmågan. Uppsatsen svarar på frågan: Vilka möjligheter finns att bedriva signalspaning och störning mot radiokommunikation som använder bandspridningsteknikerna frekvenshopp eller …
Metodik för utmattningsberäkning av svets i vibrationsmiljö
… loads. The shaker table creates a vibration environment that is defined in the frequency domain by a power spectrum. Similarly, a virtual vibration table can be used to calculate the same type of load environment, which can then be used to calculate the expected lifetime. The …
Arbetsmiljö och säkerhet
På mindre företag inom byggindustrin
The accident frequency in the construction industry has shown a downward trend every year but this trend was broken 2010th. It is often lack of precautionary measures within work environment and safety that is the cause of accidents. The big construction companies understand the …
Dynamiska egenskaper hos håldäcksbjälklag belastade med gångtrafik
… show that the largest vibration amplitudes always occur when the forcing frequency is the same as the eigenfrequency of the floor. Also the path of the walking person strongly affects the vibrations in the floor. A path in mid span of a slab will cause larger maximum amplitudes …
Energioptimering
Resteffektkylning av mellanlager för använt kärnbränsle (CLAB) Oskarshamn
… which provides an indication of how much costs differ between the valve- and frequency controls of the three systems.
Införande av spårvägar i Örebro - Förslag till spårvägssträckning
… clear, effective and environmental friendly public transport with high frequency and strong capacity in a short, direct and logical network is needed. A modern tramway fulfils these criteria. At first, this report describes factors that are important to take into consideration …
Testprogram till hårdvara på en viktindikator
Radio Frequency Identification, RFID, is a convenient way to enable contactless identification which does not require any physical nor optical contact. As with any radio-based communication the signal can be intercepted, thus making the technology vulnerable to several kinds of …
Förbränningslära för bubblandefluidbädd
Radio Frequency Identification, RFID, is a convenient way to enable contactless identification which does not require any physical nor optical contact. As with any radio-based communication the signal can be intercepted, thus making the technology vulnerable to several kinds of …
Windbelt
Radio Frequency Identification, RFID, is a convenient way to enable contactless identification which does not require any physical nor optical contact. As with any radio-based communication the signal can be intercepted, thus making the technology vulnerable to several kinds of …
Analys av säkerheten av RFID i inpasseringssystem
Radio Frequency Identification, RFID, is a convenient way to enable contactless identification which does not require any physical nor optical contact. As with any radio-based communication the signal can be intercepted, thus making the technology vulnerable to several kinds of …
Livet efter en viktminskningsoperation
En kvalitativ intervjustudie med kvinnor som genomgått en viktminskningsoperation
… with Alzheimer´s disease are prevalent. They are characterized as increased frequency and duration of awakenings, decreased slow-wave sleep, REM-sleep and increase of day-time napping. Depression and lower quality of life are associated with sleep-disturbances. Altogether a …
Sömn, depressionssymtom, livskvalitet och Alzheimers sjukdom
… with Alzheimer´s disease are prevalent. They are characterized as increased frequency and duration of awakenings, decreased slow-wave sleep, REM-sleep and increase of day-time napping. Depression and lower quality of life are associated with sleep-disturbances. Altogether a …
Hunger indikerar inte akut energistatus hos friska människor
En måltidsintervention
Bakgrund En mer stillasittande livsstil med ett högre kaloriintag ökar riskerna för övervikt och andra metabola sjukdomar. För att förebygga och behandla dessa sjukdomar behöver vi bland annat förstå hur hungerkänslor regleras hos människan. Hur stor inverkan blodglukosnivåer …
Effekter av fysisk aktivitet på psykisk ohälsa hos unga kvinnor
… but the physical activity has to be regular for long-term effects. The frequency of 2-3 times per week provide effects on mood in studies. In the research area of physiological mechanisms that may reduce depression, anxiety and stress it is not enough research done on young …