Filtyp
We report on measurements of the light absorption efficiency of InSb nanowires. The absorbed 70 fs light pulse generates carriers, which equilibrate with the lattice via electron-phonon coupling. The increase in lattice temperature is manifested as a strain that can be measured with X-ray diffraction. The diffracted X-ray signal from the excited sample was measured using a streak camera. The amoun
This work describes the use of focused, high-intensity light from a Ti: sapphire laser that generates femtosecond pulses to irradiate mixture of CeO2 and Tb4O7 under ambient conditions. The prepared samples were investigated by means of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM). XRD and XPS measurement results demonstrated that solid sol
ZnWO4, ZnWO4 : Fe and ZnWO4 : Mo crystals were investigated by the methods of time-resolved spectroscopy in the temperature range of 4.2-300 K. It is shown that the Mo and Fe impurities significantly reduce the light yield of ZnWO4. The main 2.5 eV emission of ZnWO4 and the 1.77 eV emission band of ZnWO4 : Mo are shown to originate from the triplet excited state of the WO6 and MoO6 complex, respec
Absorption, reflection and emission polarization spectra of CdWO4 crystals have been studied in the region 3.5-30 eV in order to distinguish the excitonic and electron-hole processes in the vicinity of the band gap. The following parameters have been defined from the Urbach tail study at 6-300 K: E-0 = 5 eV, sigma(0) = 0.31, homega = 70 meV (565 cm(-1)). Excitonic processes have been shown to domi
Rubidium concentrations in tissues of organisms (vascular plants, fungus, insect, bird, rodents) were closely related to soil chemical properties (K+ saturation as % cation exchange capacity, and pH) at repeated sampling of 30 beech forest sites in south Sweden. The Rb+ concentration of organisms, representing a variety of tropic levels, was a sensitive measure of the K+ status of acid soil ecosys
Synthetic glucocorticoids (GCs) are widely used in the variety of dosages for treatment of premature infants with chronic lung disease, respiratory distress syndrome, allergies, asthma, and other inflammatory and autoimmune conditions. Yet, adverse effects such as glucocorticoid-induced osteoporosis and growth retardation are recognized. Conversely, 2-oxoglutarate (2-Ox), a precursor of glutamine,
A new energy and angle resolved analyzer for photoelectron spectroscopy is described. This analyzer is based on combining an advanced focusing electron lens system with time-of-flight measurements. A position sensitive detector gives time and position for the electron events. From this information the kinetic energy and start direction are obtained through a transformation procedure, giving both a
Hedersbegreppet finns på något sätt inom alla kulturer. Mot slutet av 1990-talet uppmärksammades hedersproblematiken runt om i västvärlden. I början av 2000-talet slog Sverige av hedersproblematiken, när tre flickor mördades. Alla tre flickor hade träffat svenska killar som de börjat umgås med, något som familjen och släkten ansåg hade skämt ut familjen och som resulterade i att de mördades. UppsaThe concept of honor exists in some way within all cultures. Towards the end of the 1990s, the issue of honor was recognized throughout the western world. In the early 2000s, Sweden was confronted with the subject, when three girls were murdered. All three girls had met Swedish guys whom they had started to socialize with, something that the family considered to have brought the family shame and w
Titel: Strategier för relationskommunikation via sociala medier Författare: Eric Malmquist Handledare: Jörgen Eksell Nyckelord: Marknadsföring (relationsmarknadsföring, industriell marknadsföring), sociala medier, B2B, kommunikation (strategisk kommunikation, marknadskommunikation, relationskommunikation), meningsskapande, dialog och konsumentbeteende Problem: Problemet och kunskapsluckan som jTitle: Operational strategies for relationship communication in social media Author: Eric Malmquist Advisor: Jörgen Eksell Keywords: Marketing (Industrial marketing, relationship marketing), Communication (strategic communication, marketing communication, relationship communication), B2B, Social media, Meaning creation, Dialogue and Consumer behaviour. Problem: There are very few studies regard
Turbulent flow through 90 degrees pipe bends, for four different curvatures, has been investigated using large eddy simulations. In particular, the origin of the so-called swirl switching phenomenon, which is a large scale oscillation of the flow after the bend, has been studied for different bend curvature ratios. A classification of the phenomenon into a high and a low frequency switching, with
In Sweden there are laws and recommendations from The National Board of Health and Welfare about the importance of a user's involvement in and possibility of influencing services directed at them. Even with such good intentions the same board reports that it is hard to know if people experience that they do. The purpose of my study was to examine how professionals can use their knowledge to he
Results from a Monte Carlo investigation are presented for the application of the dual photopeak window (DPW) scatter correction method to phantom geometries of varying shapes, sizes, and densities as well as to several collimators. A Monte Carlo program was used to simulate a Tc-99m point source at locations of 0.5 cm from the phantom surface, at the center, 0.5 cm from the bottom, and 4/5 the di
Serum from normal blood-donors and juvenile diabetic patients inhibited Rb+ accumulation and stimulated release of 51Cr and insulin in suspensions of dispersed pancreatic islet cells prepared from ob/ob mouse islets, which are rich in B-cells. The effects indicate the presence of a B-cytotoxic factor in human serum. Serum from mouse and fetal calf also inhibited the islet cell accumulation of Rb+.
Background: Computed tomography (CT) scans are routinely performed in positron emission tomography (PET) and single photon emission computed tomography (SPECT) examinations globally, yet few surveys have been conducted to gather national diagnostic reference level (NDRL) data for CT radiation doses in positron emission tomography/computed tomography (PET/CT) and single photon emission computed tom
Experimental results for Na and K deposited at 100 K on the A1(100) surface using low-energy electron diffraction and high-resolution core-level spectroscopy are presented. Our results show that from a coverage of 0.20 monolayers (ML), Na condenses into dense islands with a local Na coverage of 0.50 ML. In the case of K, the overlayer condenses into islands at a coverage of 0.18 ML, with a local c
Detta är den sjätte årsrapporten från Svensk Dagfjärilsövervakning, ett nationelltmiljöövervakningsprogram som koordineras av Lunds universitet på uppdrag avNaturvårdsverket sedan 2010. Svensk Dagfjärilsövervakning är ett samarbete mellan Sveriges Entomologiska Förening, Naturvårdsverket, Lunds universitet, Sveriges lantbruksuniversitet och Länsstyrelserna. Verksamheten möjliggörs av frivilliga laThis is the sixth annual report of the Swedish Butterfly Monitoring Scheme, a national monitoring programme coordinated by Lund University for the Swedish Environmental Protection Agency since 2010. The programme is a partnership between the Entomological Society of Sweden, the Swedish Environmental Protection Agency, Lund University, the Swedish University of Agricultural Sciences and the Swedish
