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A study has been conducted on positive streamer discharges in air at atmospheric conditions for a three-electrode system. The electrode system consisted of two parallel planes (one grounded and one supplied with a negative dc voltage) and a small, insulated needle, sticking out from the center of the grounded plane. A triggering positive square impulse voltage of 5 mus duration was applied to the
Abstract Effort estimation is difficult in general, and in software development it becomes even more complicated if the software process is changed. In this paper a number of alternative interview-based effort estimation methods is presented. The main focus of the paper is to present an experiment in which software engineers were asked to use different methods to estimate the actual effort it woul
OBJECTIVE: Pulse pressure (PP) is a risk marker for cardiovascular disease (CVD) in individuals 50 years and older. Inflammation is suggested to influence atherosclerosis, but could also increase PP. We aimed to examine the combined effects of PP and the inflammatory marker sialic acid, and their independent roles on CVD risk. METHODS: From a population-based study in Sweden between 1962 and 196
Popular Abstract in Swedish Den tilltagande växthuseffekten förväntas innebära en global vattenståndshöjning samt klimatförändringar. En sådan utveckling är ogynnsam för låglänta sandkuster som de runt Falsterbohalvön. I denna avhandling diskuteras framtida höga vattenstånd tilsammans med tänkbara konsekvenser för Falsterbohalvön. Dessutom har kustnära vågor och sandtransport samt grundvattennivåeFalsterbo Peninsula in the south-west corner of Sweden is low-lying and built up of unconsolidated sand. Vulnerability to high water levels and wave action is of concern for the 10,000 residents of the peninsula, especially in consideration of global warming as enhanced inundation and coastal erosion problems may ensue. Rational counteractions of such problems are possible only through sufficient
As sentient and social beings, we live in hope that we can be understood when we try to communicate with each other but we also know that we might be wrong. We strive for better understandings, engaging in an on-going ‘dance’ of collective sense-making. This paper considers how communication among individuals involves co-creation of meaning by exploring narratives – those expressed by a speaker an
Removal of trace organic contaminants from aqueous solutions by air strippers (AS) and fixed bed carbon adsorper (FBCA) has been studied. A trace organic treatment tool has been developed to capture and adapt the best-known designprocedures and to have all regulated trace organics, their physical and chemical properties, and the corresponding maximum concentration limits. Outputs include the selec
One may begin describing the distance course “IT and Learning- rehabilitation engineering” by saying that it was a great success. Looking back, it is evident that our experience from two years of working with Internet-based teaching prior to the present course was absolutely vital to its favorable outcome. It is difficult to switch from classroom-based to Internet-based teaching. There are mechani
Recently, chemists and physicists in the Joint Working Party (JWP) have approved the new elements, but what is the significance and how can we make use of elements that exist so fleetingly?
The single muscle fiber preparation provides an excellent tool for studying the mechanical behaviour of the contractile system at sarcomere level. The present article gives an overview of studies based on intact single fibers from frog and mouse skeletal muscle. The following aspects of muscle function are treated: (1) The length-tension relationship. (2) The biphasic force-velocity relationship.
BACKGROUND: Retransfusion of the patient's own blood during surgery is used to reduce the need for allogenic blood transfusion. It has however been found that this blood contains lipid particles, which form emboli in different organs if the blood is retransfused on the arterial side. In this study, we tested whether retransfusion of blood containing lipid micro-particles on the venous side in a po
