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Studies on the alpha-recoil implantation of 214Pb and 210Pb in glass surfaces,Implications for retrospective radon measurements

Glass sheets are often used in radon surveys to estimate retrospective radon concentrations, as radon progenies are embedded in the upper surface layer. The implanted activity is influenced by a variety of different environmental conditions. In this work, experimental methods based on etching to determine the depth distribution of recoil-implanted 210Po in glass from radon decay in air were develo

Crossflow Microfiltration of particle Suspensions - The influence of hydrodynamics and physico-chemical interactions

Crossflow microfiltration is a technique to separate suspended particles (or cells or droplets) from liquids by use of a membrane that is permeable for the liquid but impermeable for the particles. The permeate flow drives particles to the membrane surface, where they may be deposited and form a fouling layer. To limit the growth of this fouling layer a flow is applied tangentially to the membrane

Improved computerized perimetric threshold strategies

Perimetric threshold examination is the most important method for diagnosing and monitoring patients with glaucoma. Such examination, however, is time-consuming and often difficult for the elderly patients in whom glaucoma is prevalent. Shorter test strategies have been proposed, but unfortunately also with lower test quality. By using new computer-intense techniques for acquisition and processing

Ertebølle pottery in southern Sweden - a question of handicraft, networks and creolisation in a period of neolithisation

In this paper the Ertebølle pottery will be in focus, and it serves as an entrance for a short discussion of its role in the time in question, as part of networks, creolization, and in the neolithisation. The interpretation of the meaning of the ceramics and the materiality gives further perspectives to interpret this early pottery handicraft, its technological conditions and artistic design. In t