Sökning: "mass medium"

Visar resultat 21 - 25 av 236 avhandlingar innehållade orden mass medium.

1. 21. Stellar Winds of Cool Giants : Investigating the Mass-Loss Mechanism of AGB Stars

   Författare :Sofie Liljegren; Susanne Höfner; Kjell Eriksson; Bernd Freytag; Hans Olofsson; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; late-type stars; AGB stars; stellar winds; stellar atmospheres; dust; stellar pulsation; hydrodynamics; radiative transfer;

   Sammanfattning : Asymptotic giant branch (AGB) stars are luminous cool giants of low to intermediate mass that are strongly pulsating and non-spherical, with heavy mass loss through a stellar wind. The mass loss makes these stars important for galactic chemistry, as the wind enriches the interstellar medium with new elements and dust, and it determines the final fate of these stars. LÄS MER

3. 22. Studies of Interstellar Molecular Gas in the Magellanic Clouds

   Författare :Arto Heikkilä; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; abundances-Galaxies; evolution; molecules-Galaxies; Magellanic Clouds-Interstellar medium; molecules-Galaxies; interstellar medium-Galaxies;

   Sammanfattning : Results of observational studies of interstellar molecular gas clouds in the Large Magellanic Cloud (LMC) and the Small Magellanic Cloud (SMC), two nearby metal-poor and dust-poor dwarf galaxies, are presented. Spectral line radiation emitted by interstellar molecules has been used to probe the physical state and the chemical composition of individual molecular clouds. LÄS MER

4. 23. Industrial Phantasmagoria : Subcultural Interactive Cinema Meets Mass-Cultural Media of Simulation

   Författare :Mikolaj Dymek; Mats Engwall; Claes Gustafsson; Alf Rehn; Saara Taalas; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; video game industry; computer game industry; video games; computer games; cultural industries; media industries; cultural economy; game studies; literary theory; ludology; narratology; interactive cinema; simulational media; ergodic literature; cybertext; interactive narrative; business studies; industrial economy; hardcore gaming; casual gaming; subcultural industries; Industrial engineering and economy; Industriell teknik och ekonomi;

   Sammanfattning : The video game industry has in three decades gone from a garage hobby to a global multi-billion euro media industry that challenges the significantly older and established cultural industries. After decades of explosive growth the industry surprisingly finds itself in a crisis – in terms of sales, future trajectories and creative paradigms. LÄS MER

5. 24. Novel methods of tandem mass spectrometry in life sciences

   Författare :Mohammadhassan Gharibi; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : Mass spectrometry (MS) is a powerful analytical technique widely employed for isotopic analysis and species identification in numerous research fields. Isotopic analysis involves precisely measuring stable isotopes within a sample, offering valuable insights into its origin, environment, and biological processes. LÄS MER

7. 25. Low kilovoltage computed tomography to reduce contrast medium dose in patients at risk of acute kidney injury

   Författare :Fredrik Holmquist; Lund Diagnostisk radiologi; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Computed tomography; Image quality; Radiation dosimetry; contrast medium induced nephropathy; Iterative reconstruction algorithms;

   Sammanfattning : Background: Patients with reduced renal function may be at risk of contrast medium-induced acute kidney injury (CI-AKI) following intravenous iodine contrast medium (CM) enhanced computed tomography (CT). Reducing the CM dose may reduce this risk. LÄS MER