Essays about: "spectral irradiance"

Found 5 essays containing the words spectral irradiance.

1. 1. Centennial Climate Variability

   University essay from Stockholms universitet/Institutionen för naturgeografi

   Author : Thomas Askjær; [2022]
   Keywords : Climate variability; paleoclimate; climatemodelsimulations; proxyrecords; spectralanalysis; model proxycomparison;

   Abstract : Throughout earths history, the climate have always naturally varied due to both external forcings and internal mechanisms. With the outlook on future climate change, it is important to understand the climate system and this includes its natural variability. Depending on the driving mechanisms, the variability happens over different timescales. READ MORE

3. 2. Energy and Circadian Assessment of a Combination Between Integrative Lighting and Daylight Harvesting

   University essay from Lunds universitet/Institutionen för arkitektur och byggd miljö; Lunds universitet/Avdelningen för Energi och byggnadsdesign

   Author : Ribhi Attar; Omar Al Mawla; [2021]
   Keywords : ALFA; Circadian Entrainment; Correlated Colour Temperature; Cortisol; Daylighting; Daylight Harvesting; Energy efficiency; Integrative lighting; Intrinsically photosensitive retinal ganglion cells; Melatonin; Melanopic Lux; Photopic Lux; Spectral Power Distribution; Technology and Engineering;

   Abstract : This study deals with the health and wellbeing of humans who work in offices as well as the energy use for the lighting. The focus is on how integrative lighting and daylight harvesting can be combined in an attempt to reduce the energy consumption while still eliciting a circadian response for the workers. READ MORE

4. 3. Developing a technique for combining light and ultrasound for deep tissue imaging

   University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

   Author : Meng Li; [2018]
   Keywords : UOT; Ultrasound Optical Tomography; Monte Carlo; TCSPC; PTOF; Photon time of flight; Ultrasound; US; AOT; Acousto-optical tomography; Spectral hole burning; SHB; ultrasound modulation; Physics and Astronomy;

   Abstract : Biological tissues are strongly light-scattering and absorbing media that limit the depth of optical-based imaging. Even though, optical imaging provides good optical contrast information of biological content that is beneficial for clinical diagnostics application. READ MORE

5. 4. Study of radiometric variations in Unmanned Aerial Vehicle remote sensing imagery for vegetation mapping

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Maria Ximena Tagle Casapia; [2017]
   Keywords : vegetation mapping; UAV; radiometric correction; vegetation indices; GEM; Earth and Environmental Sciences;

   Abstract : Unmanned Aerial Vehicles (UAVs) provide a flexible method for acquiring high-resolution imagery with relative simple operation and cost-effectiveness. This technology emerged 30 years ago and it is widely used by commercial, scientific, and military communities due to its versatility. However, new technology brings new challenges. READ MORE

6. 5. Should we point them away from the sun? -A study in PV spectral tracking in a Scandinavian climate

   University essay from Lunds universitet/Avdelningen för Energi och byggnadsdesign

   Author : Petter Stefansson; [2015]
   Keywords : PV spectral response.; radiative transfer model; spectral mismatch factor; spectral irradiance; Solar tracking; Technology and Engineering;

   Abstract : Conventional photovoltaic solar tracking is commonly done by aligning the surface normal of a PV module with the direction from which direct solar irradiation is coming from. While this tracking design has proven to perform well in sunny climates, solar tracking is altogether less common in northern climates where the direct solar irradiance is weaker. READ MORE