Essays about: "ljus"

Showing result 11 - 15 of 654 essays containing the word ljus.

1. 11. Localized and extended states in finite-sized mosaic Wannier-Stark lattices

   University essay from KTH/Tillämpad fysik

   Author : Emrah Tortumlu; [2023]
   Keywords : Applied Physics; Condensed matter physics; quantum technology; quantum nanophotonics; localization; mobility edge; phase transition; Tillämpad Fysik; Kondenserade materiens fysik; kvantteknologi; kvantnanofotonik; lokalisering; fasövergång;

   Abstract : Anderson localization occurs when an otherwise conductive solid becomes insulatingdue to a sufficiently large degree of disorder in the medium. The electron band energy(as a function of disorder) at which this transition between extended and localizedelectron states occur is called the mobility edge (ME) and is energy-dependent only in3-dimensional systems. READ MORE

3. 12. Ventilation for reduced indoor spread of Covid 19 and similar diseases : A literature review focusing on hospital environments

   University essay from Högskolan i Gävle/Energisystem och byggnadsteknik

   Author : Cyrus Ourak Pour; [2023]
   Keywords : COVID-19; SARS-CoV-2; Ventilation system; Mixing ventilation MV ; Displacement ventilation DV ; Under floor air distribution UFAD ; Ultraviolet light UV ; HEPA filter; COVID-19; SARS-CoV-2; Ventilationssystem; Blandningsventilation; Deplacementventilation; Luftfördelning under golv; Ultraviolett ljus; HEPA-filter;

   Abstract : Today, a significant portion of individuals’ time is spent indoors, estimated at approximately 90% of their total time. This raises concerns about the transmission of Coronavirus Disease 2019 (COVID-19) instigating Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) and similar viruses and highlights the critical role of ventilation systems in indoor environments, which this study aims to investigate. READ MORE

4. 13. In-Situ Investigation of Particle Assisted GaSb Nucleation Using Environmental TEM

   University essay from Lunds universitet/Centrum för analys och syntes

   Author : Aidas Urbonavicius; [2023]
   Keywords : ETEM; Nucleation; GaSb; Nanowires; Materials chemistry; Technology and Engineering; Chemistry;

   Abstract : III-V semiconductor material based nanowires have been extensively studied and shown to be a very exciting building block for future electronics. Material systems such as GaSb show a lot of promise in optoelectric and thermoelectric generation applications because of its high electron mobility and small bandgap. READ MORE

5. 14. Quantum Espionage

   University essay from KTH/Tillämpad fysik

   Author : Carlo Ninic Svensson; [2023]
   Keywords : Quantum Nano Photonics; SNSPD; OTDR; Nano Kvantfotonik; SNSPD; OTDR;

   Abstract : This thesis investigates the security of optical fiber communication and demonstrates the feasibility of eavesdropping using different tapping methods and superconducting nanowire single-photon detectors (SNSPDs). Methods for surveillance against fiber intrusion are also investigated. READ MORE

6. 15. Starshades: Geoengineering Solutions and Technosignatures in Direct Imaging Phase Curves

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

   Author : Claudia Skoglund; [2023]
   Keywords : Starshades; extraterrestrial intelligence; stellar evolution; technosignatures; phase curves; direct imaging; habitable zone.; Physics and Astronomy;

   Abstract : The stellar luminosity increases as a star evolves which inevitably yields a higher temperature on planets in orbit around the star. It is reasonable to assume that intelligent civilizations would tackle this issue through installing artificial structures that can alter the radiation received by the planet. READ MORE