Sökning: "strål"

Visar resultat 1 - 5 av 16 uppsatser innehållade ordet strål.

  1. 1. Ray-Tracing Modeling of Grating Lobe Level Reduction by Using a Dielectric Dome Antenna

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Lukas Jonasson; [2023]
    Nyckelord :Array antenna; Dielectric dome; Ray-Tracing; Grating lobe; Particle Swarm optimization; Gruppantenn; Dielektrisk kupol; Strålspårning; Gallerlob; Particle Swarm optimering;

    Sammanfattning : With the newly deployed fifth-generation telecommunications system and upcoming sixth-generation, high-gain antennas with hemispherical scanning capabilities are of high interest. Phased array antennas allow for fast scanning capabilities with electronic beam-steering. LÄS MER

  3. 2. Evaluation of intrafractional motion for patients receiving whole brain radiotherapy in open-faced immobilisation masks

    Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen

    Författare :Sara Falk; [2023]
    Nyckelord :Medicine and Health Sciences;

    Sammanfattning : Purpose/Background Patients receiving whole brain radiotherapy (WBRT) today are treated with an immobilisation mask which fully covers their face and therefore might be experienced as uncomfortable and claustrophobic. In recent years, optical surface scanning (OSS) systems have been implemented for patient positioning and real-time motion monitoring [1]. LÄS MER

  4. 3. Jet fragmentation in shaped charges

    Master-uppsats, KTH/Matematik (Avd.)

    Författare :Joakim Ericson; [2022]
    Nyckelord :Shaped charges; numerical simulation; jet fragmentation; Riktad sprängverkan; numerisk simulering; strål-fragmentering;

    Sammanfattning : This master thesis treats the numerical simulation of shaped charge jets and its fragmentation process. Shaped charges is a method to concentrate the effect of an explosive charge and penetrate deeply into a target due to a the formation of a jet with great penetration capabilities. LÄS MER

  5. 4. Mäns erfarenheter av att leva med diagnostiserad prostatacancer

    Kandidat-uppsats, Högskolan i Skövde/Institutionen för hälsovetenskaper

    Författare :Ariya Senajak; Jessie Valdez; [2022]
    Nyckelord :experiences; prostate cancer; sexual health; suffering; support; erfarenhet; lidande; prostatacancer; sexuell hälsa; stöd;

    Sammanfattning : Bakgrund: Prostatacancer är en av det vanligare cancerformer som drabbar män. Behandlingar som innefattar kirurgisk, cytostatisk, strål- och hormonbehandling orsakar lidande för männen. Sjuksköterskan har som skyldighet att vägleda, motivera och informera männen kring sin sjukdom. LÄS MER

  7. 5. Optimization of the Gamma Knife Treatment Room Design

    Master-uppsats, KTH/Fysik

    Författare :Nelly Nygren; [2021]
    Nyckelord :Gamma Knife; Treatment Room; Radiation Shielding; Dose Calculation; Computation; Monte Carlo; Simulation; Phase Space; Optimization; Gamma Knife; Behandlingsrum; Strålskydd; Stråldosberäkning; Beräkning; Monte Carlo; Simulering; Fasrum; Optimering;

    Sammanfattning : Radiation shielding is a central part of the design of treatment rooms for radiation therapy systems. The dose levels that medical staff and members of the public can be exposed to outside the treatment rooms are regulated by authorities and influence the required wall thicknesses and possible locations for the systems. LÄS MER