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We present and discuss the complete set of infrared-active phonon modes in monoclinic-symmetry crystal modification gallium oxide (gallia, β-Ga2O3). The phonon mode set is obtained from a comprehensive analysis of generalized spectroscopic ellipsometry data in the farinfrared and infrared spectral regions investigating various n-type electrically conductive single crystal samples with different fr
Thermal conductivity of AlxGa1-xN layers with 0 ≤ x ≤ 0.96 and variable thicknesses is systematically studied by combined thermoreflectance measurements and a modified Callaway model. We find a reduction in the thermal conductivity of AlxGa1-xN by more than one order of magnitude compared to that of GaN, which indicates a strong effect of phonon-alloy scattering. It is shown that the short-mean fr
Trögers bas är en v formad molekyl och liknar en klädhängare I profil. Den tillverkades för första gången av Julius Tröger 1887. Han använde p-Toluidine som startmaterial i en kondensations reaktion. Problemet med det startmaterialet är att det kan ge upphov till sidoprodukter i form av regio isomerer. En metod så kallat syntetiskt protokoll har tagits fram för att tillverka en variant eller med eA Trögers base analogue the amine1,7-dimethyl-6H,12H-5,11-methanodibenzo[b,f][1,5]diazocine-2,8-diamine has been synthesized successfully and characterized using 1H NMR. This work describes 4 steps out of 6 in a synthetic scheme and includes a brief summary of the history, properties and applications of Trögers Base taken from the literature. Of particular note is the condensation step the protoco
Transient thermoreflectance (TTR) technique is employed to study the thermal conductivity of β-Ga2O3 and high Al-content AlxGa1-xN semiconductors, which are very promising materials for high-power device applications. The experimental data are analyzed with the Callaway's model taking into account all relevant phonon scattering processes. Our results show that out-of-plane thermal conductivity of
Strain-stress relationships for physical properties are of interest for heteroepitaxial material systems, where strain and stress are inherent due to thermal expansion and lattice mismatch. We report linear perturbation theory strain and stress relationships for optical phonon modes in monoclinic crystals for strain and stress situations which maintain the monoclinic symmetry of the crystal. By us
PMSMs have acquired wide applications in industries because of high power density, high efficiency, and reliable operation. PMSMs possess numerous benefits, including low maintenance, smooth operation, quick dynamic response, and improved thermal management due to permanent magnets used instead of rotor windings. These characteristics render PMSMs suitable for use in electric vehicles (EVs), indus
The assessment of residual lymphovascular invasion (LVI) in breast cancer patients undergoing neoadjuvant therapy may be a critical factor influencing prognosis and treatment decisions. However, there is a notable discrepancy between the RCB, UICC/AJCC, and ICCR guidelines regarding how LVI should be evaluated and reported in this context. ICCR recommends including LVI in the invasive tumor size f
Being able to dynamically shape light at the nanoscale is one of the ultimate goals in nano-optics1. Resonant light–matter interaction can be achieved using conventional plasmonics based on metal nanostructures, but their tunability is highly limited due to a fixed permittivity2. Materials with switchable states and methods for dynamic control of light–matter interaction at the nanoscale are there
Biological membranes and human interfaces are maintained under non-equilibrium conditions, where they are constantly exposed to different stimuli. The aim of this work is to advance our knowledge of human interfaces and evaluate how they respond to stimuli they naturally encounter, such as fluctuations in external humidity conditions, temperature, or UVB irradiation. In the first part of this thes
Background: The lectin-like oxidised low-density lipoprotein receptor-1 (LOX-1) mediates atherosclerotic plaque inflammation and vulnerability. On activation, LOX-1 sheds its extracellular domain into the circulation as soluble LOX-1 (sLOX-1). sLOX-1 is markedly elevated in patients with acute coronary syndrome (ACS). Methods: We prospectively assessed the associations between plasma sLOX-1 and th
Presented here is the development and demonstration of a tunable cavity-enhanced terahertz (THz) frequency-domain optical Hall effect (OHE) technique. The cavity consists of at least one fixed and one tunable Fabry-Pérot resonator. The approach is suitable for the enhancement of the optical signatures produced by the OHE in semi-transparent conductive layer structures with plane parallel interface
Accessible design enables participation in the digital society for everyone. However, cognitive accessibility is not well established within the field of web design. The International Classification of Functioning, Disability and Health (ICF) provides a descriptive framework that relates health conditions to functioning and participation. ICF Core Sets are purposefully tailored shortlists of ICF c
A complete set of all optical phonon modes predicted by symmetry for bixbyite structure indium oxide is reported here from a combination of far-infrared and infrared spectroscopic ellipsometry, as well as first principles calculations. Dielectric function spectra measured on high quality, marginally electrically conductive melt grown single bulk crystals are obtained on a wavelength-by-wavelength
OBJECTIVES: Telehealth, the provision of healthcare through digital communication, has been proposed as a potential solution to meet the increasing demand for healthcare, particularly in the setting of the COVID-19 pandemic. Sweden has an established national telehealth service for triage and referral by phone (1177) since 2013 which has the potential to meet this increasing demand. However, littl
This paper advances a model of moral ambiguity in entrepreneurial action. Our model specifies the mechanisms surrounding moral responsibility, moral motivation, and the moral threshold through which perceived moral ambiguity shapes action. Specifically, we theorize (a) the interpretative elements that steer how the entrepreneur attributes moral responsibility and establishes moral motivation, (b)
Decarbonization in several countries is now linked to the prospect of implementing a national hydrogen economy. In countries with extensive natural gas infrastructure, hydrogen may provide a real opportunity to decarbonize space heating. While this approach may prove technically and economically feasible in the long-term, it is unclear whether consumers will be willing to adopt hydrogen-fueled app
The thesis investigates the generation of terahertz (THz) radiation through difference-frequency generation (DFG) using chirped and unchirped near-infrared pulses. THz radiation enables the study of phonon dynamics in matter through direct interaction with the crystal lattice. THz radiation is used to induce low-energy excitations in matter while simultaneously avoiding large increases in sample t
