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It is demonstrated that an accurate approximation of the screening function is crucial for a quantitative evaluation of the XPS asymmetry index α. It is also shown that the dynamical aspects of the valence electron response are important in order to get an accurate description of the XPS spectrum at finite distances from the threshold.(23 refs)
A polyacrylamide gel crosslinked with allyl-b-cyclodextrin can be used repeatedly for several weeks for the separation of DNA fragments, since bubbles are not generated during a run. Allyl-b-cyclodextrin can easily be synthesized in one step from allylglycidylether and b-cyclodextrin. The plate numbers for DNA fragments, up to about 1500 bp, are high: for the 21 separation of pBR322/HaeIII fragmen
PURPOSE: To evaluate the use of x-ray imaging performed with a high-power laser system in biologic and medical studies. MATERIALS AND METHODS: A compact terawatt laser system based on chirped pulse amplification in titanium-doped sapphire was used. X rays were generated by irradiating a high-atomic-number target (tantalum). RESULTS: When photons with an energy below 10 keV were removed with use of
The article provides an overview of ongoing research and key characteristics of Cognitive Semiotics, an emerging field dedicated to the transdiciplinary study of meaning, involving above all researchers from semiotics, linguistics, developmental and comparative psychology and philosophy. The combination of the following features distinguishes it from other synthetic approaches: (a) integration of
Temperaturen i ett material styrs av variationer i den omgivande miljön. Solstrålning, vindhastighet, lufttemperatur och långvågig värmestrålning bidrar tillsammas till att temperaturen i konstruktioner ändras i både tid och rum. Temperaturfördelningen i en konstruktion kan delas upp i komponenter; medeltemperatur, linjär temperaturdifferens horisontellt och vertikalt, samt en ickelinjär komponent
Maximal oxygen uptake (VO2max) and the amount of type 1 fibers are interrelated but the underlying unifying molecular mechanisms are poorly understood. To explore these mechanisms we related gene expression profiles in skeletal muscle biopsies of 43 age-matched men from published datasets with VO2max and amount of type 1 fibers and replicated some of the findings in muscle biopsies from 154 young
A major problem in the design of combustion equipment is to prevent the occurrence of combustion instabilities. Combustion instabilities appear as periodic oscillations in pressure and heat release through a feedback mechanism between the fluid dynamics and the combustion process. These oscillations may induce e.g. mechanical vibrations and increased heat transfer, leading to poor performance or e
We use the frequency doubled light from an optically trapped lithium niobate particle for non-intrusive scanning near-field optical microscopy. The detected power from this 50-100 nm diameter probe is currently tens of pW and is expected to approach nW with an improved detection system. The current experimental resolution is approximately 0.5 [mu]m, while the ultimate theoretical resolution is 70-
We consider a MIMO system where error-prone feedback from the receiver is used by the transmitter to select a single optimum antenna to transmit data. Such error-prone feedback is common in the bandwidth-limited real systems, and is in marked contrast with the idealizations assumed in the selection literature. We show how the signaling assignment, which maps the antenna indices to the codewords th
Electric and magnetic currents are essential to describe electromagnetic-stored energy, and the associated antenna Q and the partial directivity to antenna Q-ratio, D/Q, for arbitrarily shaped structures. The upper bound of previous D/Q results for antennas modelled by electric currents is accurate enough to be predictive. This motivates us to develop the analysis required to determine upper and/o
Review of Utfordringer for norsk middelalderarkeologi. Rapport fra seminar 2008 (2013)
