Results
repositories = "Linköping University Electronic Press"
> : "Physics"
(x)
Toughness enhancement in transition metal nitrides
Author(s) :
Sangiovanni, Davide Giuseppe
Description :
Toughness enhancements can be induced in cubic-B1 transition metal nitride alloys by an increased occupation of the d-t2g metallic states. In this Licentiate Thesis I use density functional theory to investigate the mechanical properties of TiN and VN and of the ternaries obtained by replacing 50% o...
Repository :
Linköping University Electronic Press
Language(s) :
English
Laborativ undervisning i fysik & kemi : En intervjustudie om lärares erfarenheter av laborationer och deras förhållningssätt till de nationella proven i undervisningen Laboratory instruction in physics & chemistry : An interview study about teachers experiences of laboratory work and their attitude towards the national tests in their teaching
Description :
Under våren 2009 genomfördes för första gången nationella prov i fysik och kemi i grundskolans årskurs 9. I dessa prov ingår en laborativ del där elever själva ska planera, genomföra och utvärdera en naturvetenskaplig undersökning. Syftet med studien är att belysa lärares erfarenheter av, och förest...
Repository :
Linköping University Electronic Press
Language(s) :
Swedish
Molecular Electronics : A Theoretical Study of Electronic Structure of Bulk and Interfaces
Author(s) :
Unge, Mikael
Description :
This thesis deals with theoretical studies of the electronic structure of molecules used in the context of molecular electronics. Both studies with model Hamiltonians and first principle calculations have been performed. The materials studied include molecular crystals of pentacene and DNA, which ar...
Repository :
Linköping University Electronic Press
Language(s) :
English
Surface Energy Patterning and Optoelectronic Devices Based on Conjugated Polymers
Author(s) :
Wang, Xiangjun
Description :
The work presented in this thesis concerns surface energy modification and patterning of the surfaces of conjugated polymers. Goniometry and Wilhelmy Balance techniques were used to evaluate the surface energy or wettability of a polymer’s surface; infrared reflectionabsorption spectroscopy (IRAS) w...
Repository :
Linköping University Electronic Press
Language(s) :
English
Optical Properties of Silica-Copper Oxide Thin Films Prepared by Spin Coating
Author(s) :
Mårtensson, Niklas
Description :
Optical properties of copper oxide nanoparticles in a silica matrix thin film have been investigated. Films were prepared on Si substrates from a sol-gel by spin coating. Four samples with different thicknesses, from 14,5-109 nm, were fabricated. Optical properties were measured with Variable Angle ...
Repository :
Linköping University Electronic Press
Language(s) :
English
X-ray absorption spectroscopy by means of Lanczos-chain driven damped coupled cluster response theory
Author(s) :
Fransson, Thomas
Description :
A novel method by which to calculate the near edge X-rayabsorption fine structure region of the X-ray absorption spectrum has been derived and implemented. By means of damped coupled cluster theory at coupled cluster levels CCS, CC2, CCSD and CCSDR(3), the spectra of neon and methane have been inves...
Repository :
Linköping University Electronic Press
Language(s) :
English
Calibration of Ionization Chambers for Measuring Air Kerma Integrated over Beam Area in Diagnostic Radiology
Author(s) :
Larsson, Peter
Description :
The air kerma area product PKA is an important quantity used by hospital physicists in quality assurance and optimization processes in diagnostic radiology and is recommended by national authorities for setting of diagnostic reference levels. PKA can be measured using a transmission ionization chamb...
Repository :
Linköping University Electronic Press
Language(s) :
English
Inkjet and Screen Printed Electrochemical Organic Electronics
Description :
Linköpings Universitet och Acreo AB i Norrköping bedriver ett forskningssamarbete rörande organisk elektrokemisk elektronik och det man kallar papperselektronik. Målet på Acreo är att kunna trycka denna typ av elektronik med snabba trycktekniker så som offset- eller flexotryck. Idag görs de flesta d...
Repository :
Linköping University Electronic Press
Language(s) :
English
Dosimetry and radiation quality in fast-neutron radiation therapy : A study of radiation quality and basic dosimetric properties of fast-neutrons for external beam radiotherapy and problems associated with corrections of measured charged particle cross-sections
Author(s) :
Söderberg, Jonas
Description :
The dosimetric properties of fast-neutron beams with energies ≤80 MeV were explored using Monte Carlo techniques. Taking into account transport of all relevant types of released charged particles (electrons, protons, deuterons, tritons, 3He and α particles) pencil-beam dose distributions were derive...
Repository :
Linköping University Electronic Press
Language(s) :
English
Theoretical investigation of the first-order hyperpolarizability in the two-photon resonant region Teoretisk undersökning av andra ordningens susceptibilitet i det tvåfotonresonanta området
Author(s) :
Bergstedt, Mikael
Description :
Time-dependent density functional theory calculations have been carried out to determine the complex first-order hyperpolarizability in the two-photon resonance region of the molecule IDS-Cab. Calculations show that three strongly absorbing states, in the ultraviolet region, are separated to the ext...
Repository :
Linköping University Electronic Press
Language(s) :
English