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The T matrix for scattering of waves by a circular disk is derived. Both the scalar (Dirichlet and Neumann boundary conditions) and the vector (perfectly conducting disk) cases are considered and the use of alternative choices for surface field functions is discussed in detail, and it is found that either type of the surface field representation is equally good for the disk case. Analytic expressi
Uncracked reinforced concrete slabs were field exposed mounted on a floating pontoon and partly submerged for 5 years at the Swedish west coast. The total chloride ingress was analysed at various exposure times at 3 elevations representing a submerged, a splash, and an atmospheric exposure zone. The concrete mixtures varied in w/c ratio, type of cement, and amount and type of pozzolan used in the
ABSTRACT: Study Design. Epidemiological total population study based on a prospective follow-up CP registry.Objective. To describe the prevalence of scoliosis in a total population of children with CP, to analyse the relation between scoliosis, gross motor function and CP subtype, and to describe the age at diagnosis of scoliosis.Summary of Background Data. Children with cerebral palsy (CP) have a
Time-gated imaging is a new technique for scatter suppression in radiological imaging, based on the use of ultrashort x-ray pulses in combination with a fast gatable detector. We demonstrate scatter suppression in both planar and computed tomography (CT) radiography in an experimental model using x rays from a laser-produced plasma. The scatter-suppression efficiency of time-gated imaging is found
Multitype branching processes have been employed to determine the stack algorithm computational distribution for one subtree. These results are extended here to the distribution of the number of computations in any finite number of subtrees. Starting from the computational distribution forK-1subsequent subtrees, a recurrent equation for the distribution forKsubsequent subtrees is determined.
Popular Abstract in Swedish Denna avhandling handlar om akustofores, dvs. om hur ultraljud kan användas för separation av celler och mikroskopiska partiklar i en ytterst smal flödeskanal. Separationen kan handla om att man vill separera en typ av celler från en annan, som till exempel när man letar efter s.k. cirkulerande tumörceller i blodprover från cancerpatienter. I ett annat fall så vill man This thesis presents experimental studies of microchannel acoustophoresis, a technique for manipulation of microscopic objects in suspension by means of acoustic radiation forces induced by ultrasonic standing wave fields. By arranging an acoustic resonance across the width of a microchannel, the path of individual cells or microparticles can be deflected orthogonally to the fluid flow. The prop
When skeletal muscle is stretched above optimal sarcomere length during tetanic activity there is an increase in force that stays above the isometric force level throughout the activity period. This long-lasting increase in contractile force, generally referred to as "residual force enhancement after stretch" (Fresid), has been studied in great detail in various muscle preparations over more than
Inledning till ett temanummer av Språk och stil med tema textforsknng. Artikeln ger en översikt över den svenska textforskningens status och utveckling.
The purpose of the present paper is to outline emerging trends in nanomedicine, as well as to discuss some of the potential benefits and problems the medical applications of nanotechnologies may give rise to. In the paper some of the suggestions recently made by the European Group on Ethics in Science and New Technologies concerning how to deal with some of these problems are presented. I conclude
Miljardmarknad med dödliga konsekvenser. Falska mediciner är ett nästan okänt hälsohot för svensk allmänhet, trots att de dyker upp bland läkemedel som köps på internet. Andelen svenskar som handlar mediciner på nätet ökar. Nu krävs tydlig och återkommande information om farorna med förfalskningar, skriver Susanne Lundin.
We previously described and showed that the method for cardiac de-airing involving: (1) bilateral, induced pulmonary collapse by opening both pleurae and disconnecting the ventilator before cardioplegic arrest and (2) gradual pulmonary perfusion and ventilation after cardioplegic arrest is superior to conventional de-airing methods, including carbon dioxide insufflation of the open mediastinum. Th
