Sökning: "Spektra analys"

Visar resultat 1 - 5 av 27 uppsatser innehållade orden Spektra analys.

1. 1. Spectroscopic determination of stellar parameters to constrain atomic diffusion in the old open cluster M67

   Kandidat-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

   Författare :Fabian Lundell; [2022]
   Nyckelord :;

   Sammanfattning : In an attempt to check published results on diffusion effects in M67 a non-LTE analysis is made on 28 high resolution FLAMES-UVES spectra of dwarfs and sub-giants around the turnoff point, where core hydrogen fusion halts. This analysis utilizes the software-suites LOTUS and iSpec to determine stellar parameters from equivalent-width measurements. LÄS MER

3. 2. Theoretical Fundamentals of Computational Proteomics and Deep Learning- Based Identification of Chimeric Mass Spectrometry Data

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

   Författare :Jens Settelmeier; [2021]
   Nyckelord :Computational proteomics; mass spectrometry; chimera identification; machine learning; deep learning; big data; bioinformatics; Beräkningsproteomik; masspektrometri; kimäridentifiering; maskininlärning; djupinlärning; stora data; bioinformatik;

   Sammanfattning : A complicating factor for peptide identification by MS/MS experiments is the presence of “chimeric” spectra where at least two precursor ions with similar retention time and mass co- elute in the mass spectrometer. This results in a spectrum that is a superposition of the spectra of the individual peptides. LÄS MER

4. 3. Prussian White In Sodium- Ion Batteries : An evaluation of organic and inorganic coatings on active material particles

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

   Författare :Philip Jansson; [2021]
   Nyckelord :Sodium-ion batteries; Prussian White; Coating; Surface engineering; Zinc oxide; Polyaniline; Natriumjonbatterier; Berlinervitt; Beläggning; Ytmodifiering; Zinkoxid; Polyanilin;

   Sammanfattning : Emerging markets in electrochemical energy storage, such as stationary grid storage, coupled with future concerns over the availability of lithium, places sodium-ion battery (SIB) technologies at a unique position to enter the market as a commercially viable alternative. Current shortcomings in the performance of cathode materials in SIBs would necessarily need to be addressed if this technology is to compete with existing commercial lithium-ion battery counterparts. LÄS MER

5. 4. Towards a high resolution view of infrared line formation

   Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

   Författare :Martin Schmidt Montelius; [2021]
   Nyckelord :Spectroscopy; Near infrared; K giants; Galactic archeaology; Galactic chemical evolution; Abundances; Milky Way; Physics and Astronomy;

   Sammanfattning : Observing in the infrared has many benefits, such as seeing through the interstellar dust in the galaxy, easier use of adaptive optics, and better flux ratios for direct observations of exoplanets. Before the infrared spectral range can be utilised for highly accurate stellar spectroscopy there is a need for a better understanding of both stellar modelling and the atomic physics that go into forming spectral lines. LÄS MER

7. 5. Basic Creep of Young Concrete - Sensitivity in the Evaluation Method

   Master-uppsats, KTH/Betongbyggnad

   Författare :Benar Ekmat; Natalea Hermes; [2019]
   Nyckelord :thermal cracking; young concrete; creep; Linear Logarithmic Model; temperature development; average strain; sensitivity.; Temperatursprickor; ung betong; krypning; Linjär Logaritmisk Modell; temperaturutveckling; töjning; känslighet.;

   Sammanfattning : Creep is defined as deformation that takes place under constant load after an initial elastic response. This thesis focuses on a material property problem area that concerns stress analysis. Focus is on stress development considering creep deformations occurring when a concrete structure is under load, i.e. LÄS MER