Search for dissertations about: "Erik Westin"

Showing result 1 - 5 of 6 swedish dissertations containing the words Erik Westin.

  2. 1. Application of cluster calculations for the interpretation of electron and ion emission from ionic crystals

    Author : Erik Westin; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; local density approximation LDA ; laser induced desorption; alkaline-earth halogens; surface states; ionic crystals; electronic structure;

    Abstract : .... READ MORE

  4. 2. Calculations of Linear and Nonlinear Optical Properties of Ionic Crystal Surfaces and Fullerenes

    Author : Erik Westin; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Electronic and optical properties of ionic crystal surfaces and fullerenes have been studied by means of cluster calculations based on the Local Density Approximation (LDA) method using a numerical LCAO approach. The calculations for the bulk, stoichiometric and non-stoichiometric (111) surfaces of the divalent ionic crystals, CaF2 and BaF2, were based on the construction of an appropriate cluster of Ba++/Ca++ and F- ions representing a local environment of the specific system. READ MORE

  5. 3. Simulation of turbocharged SI-engines - with focus on the turbine

    Author : Fredrik Westin; Hans-Erik Ångström; Gordon P Blair; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering design; turbocharging simulation 1D turbine accuracy SI-engine; Konstruktionsteknik; Construction engineering; Konstruktionsteknik;

    Abstract : The aim is to share experience gained when simulating (and doing measurements on) the turbocharged SI-engine as well as describing the limits of current state of the technology. In addition an overview of current boosting systems is provided. READ MORE

  6. 4. Heterometallic Oxo-Alkoxides of Europium, Titanium and Potassium

    Author : Erik Berger; Gunnar Westin; Lars Eriksson; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Alkoxides; Europium; Lanthanoids; Electronic absorption spectroscopy; f-f spectroscopy; Coordination chemistry; Koordinationskemi; Inorganic Chemistry; Oorganisk kemi;

    Abstract : Coordination compounds of europium and titanium with oxide, ethoxide (OCH2CH3), iso-propoxide (OCH(CH3)2) and tert-butoxide (OC(CH3)3) ligands have been studied. These belong to the general class of oxo-alkoxides, MxOy(OR)z, with alkoxide ligands (OR) containing an organic, aliphatic part R. READ MORE

  7. 5. Olfactory Transfer of Analgesic Drugs After Nasal Administration

    Author : Ulrika Espefält Westin; Erik Björk; Eva Brittebo; Margareta Hammarlund-Udenaes; Paolo Colombo; Uppsala universitet; []
    Keywords : Pharmaceutics; Nasal administration; Olfactory transfer; Olfactory pathways; Central nervous system; Blood-brain barrier; Nasal respiratory mucosa; Olfactory mucosa; Olfactory bulb; Horizontal Ussing chamber; Morphine; Dihydroergotamine; Rat; Mouse; Swine; Autoradiography; Viability; Powder formulations; Galenisk farmaci;

    Abstract : Nasal administration of analgesics for achieving rapid pain relief is currently a topic of great interest. The blood-brain barrier (BBB) restricts access to the central nervous system (CNS) for several central-acting drugs, such as morphine and dihydroergotamine, which results in a substantial effect delay. READ MORE