Ultra-thin graphite overlayers prepared by heating SiC crystals can give highly resolved valence band photoemission spectra. This is exploited to monitor K deposition induced energy shifts of graphite valence band states. States near the corners of the Brillouin zone, responsible for the semimetal character of graphite, are observed to show shifts that are nearly equal to the shifts of the uppermo

Neuroblastoma is a childhood tumor derived from the sympathetic nervous system (SNS). It is believed that the tumors arise from cells halted in their differentiation and due to their immature phenotype; they express proteins normally only detected during embryogenesis. One such protein is Hash-1, which is required for formation of the SNS. Hash-1 is a component of the Notch signaling cascade, whic

With the increasing capacity in today's hardware system design enabled by technology scaling, image processing algorithms with substantially more complexity can be implemented in a single chip with real-time performance. Combined with the demand for low power consumption or larger resolution seen in many applications such as mobile devices and HDTV, new design methodologies and hardware architectu

During the last years there has been reported considerable and rapid contamination on newly built rendered façades in Sweden due to biological growth. The problem is believed to occur mostly on façades of render applied on thermal insulation, but apart from this it is difficult to find clear relationships indication which façades might be infected. The aim of this project is to explain why certain

We study the simulation of stochastic processes defined as stochastic integrals with respect to type G Levy processes for the case where it is not possible to simulate the type G process exactly. The type G Levy process as well as the stochastic integral can on compact intervals be represented as an infinite series. In a practical simulation we must truncate this representation. We examine the app

Datortomografi av kolon (DT-kolografi) är en ny tillämpning av datortomografi, som gör det möjligt att med hög diagnostisk säkerhet upptäcka tumörer och polyper större än 10 mm. Metoden medför mindre obehag och smärta än koloskopi och kolonröntgen. Behovet av tarmrengöring är dock detsamma. DT-kolografi kan, som initial undersökning vid misstanke om maligna förändringar eller kolonpolyper, komma a

A novel high precision method measures the b-quark forward-backward asymmetry at the Z pole on a sample of 3,560,890 hadronic events collected with the DELPHI detector in 1992 to 2000. An enhanced impact parameter tag provides a high purity b sample. For event hemispheres with a reconstructed secondary vertex the charge of the corresponding quark or anti-quark is determined using a neural network

The effect of betamethasone on choroid plexus transport and CSF formation in rabbits was studied. Following 5 days of daily treatment with betamethasone the CSF production rate was reduced by 43% as measured by ventriculo-cisternal perfusion with radioactive inulin. Accordingly, the Na(+)-K(+)-ATPase activity and the transport capacity in the choroid plexus, measured in terms of choline (10(-5) M)

Abstract not available.

Analytical formulas for the estimation of pressure and shear stresses due to friction on bent surfaces during the handling of fibers in the manufacture of industrial textiles and composites have been derived using the drive belt formula and Hertz contact stress relations. Experimentally measured at low speed, the forces and coefficients of friction give shear stresses in the same range as for the

In real-time systems potentially unbounded loops and lazy (late) evaluation are often avoided in order to improve predictability. This paper will show that a commonly suggested way to implement semaphores can lead to unnecessary blocking of high-priority tasks. It also presents a scheme with lazy evaluation and (potentially) unbounded loops that gives less blocking of high-priority tasks.

This report summarizes experiences and conclusions from a trip to University College Swansea, Swansea, Wales, the Central Electric Generation Board (CEGB), Barnwood, Gloucester, England and Marconi Instruments Limited, Scotland. The aim of the trip was to exchange information and discuss various issues incomputer aided control engineering.

This population-based register study examined if factors during the fetal and neonatal period influence the risk for the child to develop bronchial asthma (asthma). From the Swedish Hospital Discharge Register we identified children, born between 1987 and 1999, who had been hospitalized for asthma up to 2001. Thus, the outcome measure contains only hospitalized cases, not all children with asthma.