(1) Ein Absolutbetrag auf einem Integritätsbereich R ist eine Abbildung R → R≥0, die wir x 7→ |x| schreiben, die folgende Bedingungen erfüllt (für alle x, y ∈ R): (i) |x| = 0 ⇐⇒ x = 0, (ii) |xy| = |x| · |y|, (iii) |x+ y| ≤ |x|+ |y|. (a) Sei ein Absolutbetrag |·| auf R gegeben. Zeigen Sie, dass d(x, y) := |x − y| eine Metrik auf R definiert. (b) Sei v eine diskrete Bewertung auf R und sei a > 1....

Aiming at an improved knowledge of the formation of the solid electrolyte interphase (SEI), as basis for the safe and efficient use of new anode materials, we investigated the SEI formation on silicon and lithium titanate (LTO) anodes by electrochemical impedance spectroscopy (EIS) and ex situ X-ray photoelectron spectroscopy (XPS) measurements. While the EIS measurements performed at equidista...

BACKGROUND Patients with hypertrophic cardiomyopathy (HCM) sometimes develop subendocardial ischemia (SEI) in the left ventricle (LV). In the present study it was examined whether volumetric variables obtained by gated single-photon emission computed tomography (SPECT) are useful in detecting exercise-induced SEI in patients with HCM. METHODS AND RESULTS Exercise 99mTc-tetrofosmin myocardial ...

Bill Pollak: Welcome to the SEI podcast series, a production of the Carnegie Mellon Software Engineering Institute. The SEI is a federally funded research and development center at Carnegie Mellon University in Pittsburgh, Pennsylvania. A transcript of today’s podcast is posted on the SEI website at sei.cmu.edu/podcasts. My name is Bill Pollak, and today I am pleased to introduce to you Peter F...

0.1016/j.nanoen.2 lsevier Ltd. All rig thor. Tel.: +1 404 : [email protected] il.com (K. Eom). Abstract Sn materials offer high theoretical capacities in lithium ion batteries, but they must have good cycling stability and high rate-capability in order to be commercialized. Complex and costly material treatments of Sn have been effective in reducing capacity fade, but conventionally produced bare ...

The SEI-formation on graphitic electrodes operated as an Li(+)-ion battery anode in a standard 1 M LiPF6 EC/DMC (1 : 1) electrolyte has been studied in situ by EC-STM. Two different modes of in situ study were applied, one, which allowed to follow topographic and crystallographic changes (solvent cointercalation, graphite exfoliation, SEI precipitation on the HOPG basal plane) of the graphite e...

BACKGROUND Specialized Early Intervention services (SEI) for first episode psychosis are shown to be effective for the treatment of positive and negative symptoms, medication adherence, rates of relapse, substance abuse disorders, functional outcome and quality of life at two-year treatment follow up. However, it is also reported that these benefits are not maintained when SEI is not sustained....

The solid electrolyte interphase (SEI) plays a critical role in the performance and safety of Li-ion batteries, but the crystal structure of the materials formed have not been previously studied. We employ the model system of epitaxial graphene on SiC to provide a well-defined graphitic surface to study the crystallinity and texture formation in the SEI. We observe, via in situ synchrotron X-ra...