Sökning: "zero knowledge"

Visar resultat 1 - 5 av 224 uppsatser innehållade orden zero knowledge.

  1. 1. Gravitational Collapse of a Massless Scalar Field in a Theory of Minimally Modified Gravity

    Master-uppsats, KTH/Fysik

    Författare :Atabak Fathe Jalali; [2024]
    Nyckelord :Theoretical physics; astrophysics; modified gravity; minimally modified gravity; gravitational collapse; VCDM; scalar collapse; apparent horizon; numerical relativity; Teoretisk fysik; astrofysik; modifierad gravitation; minimalt modifierad gravitation; gravitationskollaps; VCDM; skalär kollaps; uppenbar horisont; numerisk relativitet;

    Sammanfattning : This thesis explores the spherically symmetric gravitational collapse of a massless scalar field in a minimally modified gravity theory denoted VCDM (V replaces $\Lambda$ in the $\Lambda$CDM abbreviation), a class of theories propagating the same degrees of freedom as general relativity at the expense of broken 4D diffeomorphism invariance. Numerical evolution of the equations of motion reveals that for small initial scalar profile amplitudes, no black hole forms from the collapse. LÄS MER

  3. 2. IMPLICATION FOR THE UNIVERSITY OF GOTHENBURG TO ALIGN WITH THE GOVERNMENT’S TARGET REGARDING CLIMATE NEUTRALITY BY 2045 - Scenarios and Consequences

    Master-uppsats, Göteborgs universitet / Institutionen för biologi och miljövetenskap

    Författare :Nafiseh Kazemi Ashtiani; [2023-06-21]
    Nyckelord :Climate Neutrality; GHG emissions; higher education institutions HEIs ; Net Zero emission; carbon footprint; carbon capture and storage CCS ;

    Sammanfattning : It is widely acknowledged that one of the most significant global challenges of the 21 st century is climate change. In its Fifth Assessment Report (2014), the Intergovernmental Panel on Climate Change (IPCC) described the present extent of the problem and the hazards involved, citing greenhouse gas emissions from human activities as the primary contributor to global warming since the mid-20th century. LÄS MER

  4. 3. En studie om hur utbildningsinsatser påverkar yrkesarbetares medvetenhet om fallsäkerhet

    Kandidat-uppsats, Jönköping University/JTH, Byggnadsteknik och belysningsvetenskap

    Författare :Josefin Somi; Rebecca Okeke; [2023]
    Nyckelord :Accident; construction; construction worker; education; fall accident; fall saftey; fall protection education and saftey.; Bygg; byggnadsarbetare; fallolycka; fallsäkerhet; olycka; säkerhet; säkerhetsutbildning; utbildning.;

    Sammanfattning : Introduktion: Byggsektorn är en utsatt bransch där många arbetsrelaterade olyckor inträffar, inklusive olyckor med dödlig utgång. Fallolyckor är en av de vanligaste förkommande typerna av olyckor, trots säkerhetsåtgärder som fallskyddsutrustning och säkerhetsrutiner. LÄS MER

  5. 4. Method Development & Analysis of Seals using FEM

    Master-uppsats, KTH/Maskinkonstruktion

    Författare :Lovisa Svanborg Östlin; [2023]
    Nyckelord :FEM; guidelines; hyperelastic materials; hyperelastic material models; method development; seals; FEM; riktlinjer; hyperelastiska material; hyperelastiska materialmodeller; metodutveckling; tätningar;

    Sammanfattning : Hyperelasticity is a significant property of rubber, taken advantage of in engineering applications. A common application is the use of seals to prevent fluid transfer (liquid or gas) between solid regions. Volvo CE is often depending on external supplier when developing seals. LÄS MER

  7. 5. Dog owner knowledge and attitudes towards oral vaccination : a field study on canine rabies in Lao PDR

    Master-uppsats, SLU/Dept. of Clinical Sciences

    Författare :Elsa Holmström; [2023]
    Nyckelord :canines; zoonoses; vaccine prevention; vaccine preferences;

    Sammanfattning : Rabies is a fatal viral disease causing around 59,000 deaths each year worldwide. Out of all deaths, 95% occur in Africa and Asia. In Lao People’s Democratic Republic (Lao PDR) rabies is endemic with dogs being the main virus reservoir. All mammals can be infected by the rabies virus but up to 99% of human rabies cases are transmitted by dogs. LÄS MER