Sökresultat

Filtyp

Din sökning på "*" gav 531497 sökträffar

Underlying hemodynamic differences are associated with responses to tilt testing

Aim of this study was to explore whether differences in resting hemodynamic parameters may be associated with tilt test results in unexplained syncope. We analyzed age, gender, systolic (SBP), diastolic blood pressure (DBP) and heart rate (HR) by merging three large databases of patients considered likely to be of vasovagal reflex etiology, comparing patients who had tilt-induced reflex response w

Chaotic behavior of quantum cascade lasers at ignition

The ignition of Quantum Cascade Lasers can occur from a state of oscillating field domains. Here, the interplay between lasing and the kinetics of traveling domain boundaries provides complex oscillation scenarios. We analyze our numerical findings in detail for a device operating at terahertz frequencies and manifest chaotic evolution by positive Lyapunov exponents. This shows that these importan

Violating the thermodynamic uncertainty relation in the three-level maser

Nanoscale heat engines are subject to large fluctuations which affect their precision. The thermodynamic uncertainty relation (TUR) provides a trade-off between output power, fluctuations, and entropic cost. This trade-off may be overcome by systems exhibiting quantum coherence. This Letter provides a study of the TUR in a prototypical quantum heat engine, the Scovil–Schulz-DuBois maser. Compariso

Structure of the native pyruvate dehydrogenase complex reveals the mechanism of substrate insertion

The pyruvate dehydrogenase complex (PDHc) links glycolysis to the citric acid cycle by converting pyruvate into acetyl-coenzyme A. PDHc encompasses three enzymatically active subunits, namely pyruvate dehydrogenase, dihydrolipoyl transacetylase, and dihydrolipoyl dehydrogenase. Dihydrolipoyl transacetylase is a multidomain protein comprising a varying number of lipoyl domains, a peripheral subunit

Cortical Activity During an Attack of Ménière's Disease-A Case Report

Background: Ménière's disease (MD) is a chronic peripheral vestibular disorder with recurrent episodes of vertigo accompanied by fluctuating hearing loss, tinnitus and aural fullness in the affected ear. There are several unanswered fundamental questions regarding MD, one of these being cortical activity during a MD attack. However, it is not possible to plan an investigation in an episodic diseas

Authors and Creative Users : Addressing the Conceptual Challenges of Digital Creativity to EU Copyright Law from the Perspective of the Author

To be an “author” might mean many different things, depending on the context in which the word is used. This thesis explores the EU copyright’s concept of author and how it relates to the everyday digital creativity on the Internet. It invites to consider what EU copyright law might look like if the digital creators which this thesis calls Creative Users were included in the legal system as “autho

Big Science and the Law

The European Spallation Source (ESS) is a state-of-the-art neutron scattering facility, built on the outskirts of Lund in Southern Sweden, and expected to be taken into scientific operation in 2023. It is funded, run, and built by a consortium of thirteen (to date) European governments who jointly provide for its funding and establish its overarching governance principles, and it is co-hosted by S

Second primary cancers after liver, gallbladder and bile duct cancers, and these cancers as second primary cancers

Background: Second primary cancers (SPCs) are important clinically as they may negatively influence patient survival and they may tell about therapeutic side effects and general causes of cancer. Population-based literature concerning SPCs after hepatobiliary cancers is limited and here we assess risks of SPCs after hepatocellular cancer (HCC), and cancers of the gallbladder, bile ducts and ampull