Sökresultat

In this study, several biodegradable Mg alloys (Mg5Zn, Mg5Zn0.3Ca, Mg5Zn0.15Ca, and Mg5Zn0.15Ca0.15Zr, numbers in wt%) were investigated after thermomechanical processing via high-pressure torsion (HPT) at elevated temperature as well as after additional heat treatments. Indirect and direct analyses of microstructure revealed that the significant strength increases arise not only from dislocations

There is an increasing interest in landscape-scale perspectives of ecosystem functioning to inform policy and conservation decisions. However, we need a better understanding of the stability of ecosystem functioning (e.g. plant productivity) at the landscape scale to inform policy around topics such as global food security. We investigate the role of the ecological and environmental context on lan

In nature, nothing is wasted, not even waste. Dung, composed of metabolic trash and leftovers of food, is a high-quality resource and the object of fierce competition. Over 800 dung beetle species (Scarabaeinae) compete in the South African dung habitat and more than 100 species can colonize a single dung pat. To coexist in the same space, using the same food, beetles divide the day between them.

Within Iran, the Zagros Mountains show high biodiversity, with a wealth of endemic species. One of these is the geometrid moth Somatina wiltshirei Prout, 1938, originally described from Iran and Iraq. In the present study, one mitochondrial and up to nine protein-coding nuclear gene regions were used along with a comparative morphological examination to investigate the systematic position of this

The intention with this chapter is to briefly review the capabilities made possible in the field of biomedical diagnostics and treatment by employing upconverting nanoparticles (UCNPs), as well as the importance of appropriate light sources for such applications. The field of UCNPs in biomedicine has grown rapidly the last decade, since they first were made sufficiently small and bright to be of r

We consider taxation of exchanges among a set of agents in which each agent owns one object. Agents may have different valuations for the objects, and they need to pay taxes for exchanges. We show that, if a rule satisfies individual rationality, strategy-proofness, constrained efficiency, weak anonymity, and weak consistency, then it is either the no-trade rule or a fixed-tax core rule. For the l

Med hjälp av det omvända klassrummets pedagogik och digitala verktyg kan man frigöra både lärar- och studentresurser och därmed effektivera undervisningen. Akademisk humaniora ställer dock särskilda krav på såväl digitala verktyg som på det omvända klassrummets övningsmoment. Bägge kräver tillämpningar som skiljer sig från andra discipliner. Vad gäller de digitala utmaningarna har vi å ena sidan s

Removal of the native surface oxide from steel is an important initial step during vacuum brazing. Trace and alloying elements in steel, such as Mn, Si, and Ni, can diffuse to the surface and influence the deoxidation process. The detailed surface chemical composition and grain morphology of the common stainless-steel grade 316L is imaged and spectroscopically analyzed at several stages of in-vacu

Background. Heart transplantation (HT) remains the ultimate final therapy for patients with end-stage heart failure. To prevent rejection of the allograft, life-long immunosuppressive therapy is required. As survival after HT has improved over the past decades, long-term complications, such as chronic kidney disease (CKD) and osteoporosis, are of increasing importance for morbidity and mortality.

The open source CFD code FireFOAM has been verified and validated against analytical solution and real fire tests. The verification showed that FireFOAM solves the three modes of heat transfer appropriately. The validation against real fire tests yielded reasonable results. FireFOAM has not been validated for a large set of real fires, which is the case for FDS. Therefore, it is the responsibility

CUnT-SPLICING THOUGHT-FORMS — Promiscuous Play with Quantum Physics and Spirituality could perhaps best be described as an invocation of excited states. In more ways than one, this dissertation indulges in a weird threesome between quantum thinking, tantric practices, and feminist theory, with artistic practice at its core. It proposes the term “cunt-splicing”—a reference to ropework and the so-ca

Drepanoistodus basiovalis (Sergeeva, 1963) is a common conodont species in Middle Ordovician strata of Baltica. For many years it has been widely accepted that the species encompasses a wide range of morphological plasticity. Hence, several different morphotypes that significantly deviate from the holotype have nonetheless been included in the broad species concept. In this study, we performed a d

The thesis work concerns development and application of four versatile nonlinear optical techniques, based on exploiting ultrashort laser pulses, for diagnostic purposes in gases and flames. The four techniques, all laser-based, are two-photon laser-induced fluorescence (TPLIF), hybrid femtosecond/nanosecond (fs/ns) rotational coherent anti-Stokes Raman scattering (fs/ns RCARS), fs-laser-induced g