Essays about: "vitt ljus"

Showing result 1 - 5 of 21 essays containing the words vitt ljus.

  1. 1. An Infrared Stellar Thermometer: Exploiting IGRINS Spectra

    University essay from Lunds universitet/Astronomi - Genomgår omorganisation

    Author : Emelie Sandved; [2022]
    Keywords : Effective temperature; K-giants; surface gravity; oxygen abundance; carbon abundance; CO lines; OH lines; line sensitivities; Physics and Astronomy;

    Abstract : Using the infrared (IR) spectral range when measuring stellar spectra is beneficial compared to using the optical range mainly when observing distant stars through the dust dense interstellar regions in the Galactic mid-plane. Methods to determine stellar parameters from IR spectra are, however, not fully developed yet because technological difficulties in creating reliable IR detectors have slowed the advance of such methods. READ MORE

  3. 2. Dark pathways : cows’ walking behavior in dim light environments

    University essay from SLU/Dept. of Animal Nutrition and Management

    Author : Kajsa Ståhlberg; [2022]
    Keywords : night light; illumination; locomotion; activity; intensity; color; distribution; obstacle course;

    Abstract : Swedish dairy cows should have access to dim light at night according to the animal welfare act, but there are no further recommendations stated for dim light management regarding light intensity, light color, or light distribution. This study aimed to examine the effects of five dim light intensities, in red and white light color, and in even and uneven light distribution on cows’ walking behavior in an obstacle course. READ MORE

  4. 3. 2D & 3D phase retrieval for propagation-based X-ray phase-contrast tomography

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

    Author : Philip Stjärneblad; [2021]
    Keywords : Propagation-based X-ray phase-contrast tomography; PB-PCT; Propagation-based X-ray phase-contrast Imaging; PB-PCI; 2d phase retrieval; 3d phase retrieval; TIE; sinogram consistency; reconstruction artefacts; Science General;

    Abstract : Propagation-based X-ray phase-contrast tomography is a 3d imaging technique that utilizes two-dimensional projections from different angular views $\theta =[0,\pi]$ to reconstruct the 3D object information. The phase-contrast allows for higher feature contrast than conventional transmission tomography, as the phase interference gives rise to a sharp edge contrast. READ MORE

  5. 4. LED belysning till mjölkkor : jämförelse av olika våglängder

    University essay from SLU/Dept. of Animal Nutrition and Management

    Author : Jessika Berglund; [2020]
    Keywords : våglängd; mjölkkor; LED; foderintag; mjölkmängd; IGF-1; melatonin; aktivitet;

    Abstract : Syftet med detta examensarbete var att undersöka om mjölkmängd, foderintag, me-latonin, IGF-1 (Insulin-like growth factor 1) eller aktivitet kan påverkas hos mjölkkor som exponeras för olika våglängder på ljus. Fyra olika ljusbehandlingar jämfördes med varandra vid baslinjen och vid LED. READ MORE

  6. 5. Ljus i mörkret : hur belysning kan öka den upplevda tryggheten i Pildammsparken

    University essay from SLU/Dept. of Landscape Architecture, Planning and Management (from 130101)

    Author : Agnes Holmgren; [2020]
    Keywords : trygghet; ljus; belysning; light pollution; belysningsplanering; Malmö;

    Abstract : Många upplever idag otrygghet när de rör sig i stadens mörker, och undviker på grund av detta platser som upplevs som skrämmande. Belysning är en viktig aspekt som påverkar känslan av trygghet, och god belysningsplanering är avgörande för att alla människor ska känna sig trygga i staden även när det är mörkt. READ MORE