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Cerebral perfusion parameters were measured using dynamic susceptibility contrast magnetic resonance imaging (DSC-MRI) in eight healthy volunteers examined during normal breathing and spontaneous hyperventilation. DSC-MRI-based cerebral blood flow (CBF) decreased during hyperventilation in all volunteers (average decrease 29%), and the corresponding global CBF estimates were 73 +/- 19 ml/(min 100g
Human systems create problem spaces that are ambiguous, uncertain and constantly changing. This requires researchers to find approaches to inquiry that can be used to explore inconsistent and ill-defined phenomena. Much analytical work is done without in-depth consideration of context. This means that important dimensions are lost – rigour in investigation is prioritised over relevance. Research m
This thesis describes the development and application of an equilibrium terrestrial biosphere model, BIOME3. The model simulates vegetation distribution and biogeochemistry, and couples vegetation distribution directly to biogeochemistry. A photosynthesis scheme was developed with maximum photosynthetic rates derived using a theory based on optimal nitrogen allocation; the scheme has the important
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The Article is an introduction to the theology of Benedikt XVI/Joseph Ratzinger based on an analysis of his main works. It is shown that Joseph Ratzinger is part of the general renewal of Roman Catholic theology during the second half of the 20th century. Contrary to widespread assumptions there can be shown only small changes in the writings of this important theologian and present pope.
Consider the American put and Russian option (Ann. Appl. Probab. 3(1993)603; Theory Probab. Appl. 39 (1994)103; Ann. Appl. Probab. 3(1993)641) with the stock price modeled as an exponential Lévy process. We find an explicit expression for the price in the dense class of Lévy processes with phase-type jumps in both directions. The solution rests on the reduction to the first passage time problem fo
Innehåller ett tiotal konferensbidrag från specialister i Danmark och Sverige ur seminarier anordnade hösten 1993 om "Marina Betongkonstruktioners livslängd"
Popular Abstract in Swedish Borrelios är en fästingöverförd infektionssjukdom som orsakas av spiroketen Borrelia burgdorferi sensu lato. Borrelia infektionen är en zoonos, en sjukdom som överförs från djur till människa. I Sverige lever bakterien framför allt i smågnagare men också fåglar kan utgöra en s.k. reservoar. Reservoaren utgör källan varifrån bakterien kan infektera fästingar som tar sig Lyme borreliosis is caused by the spirochete Borrelia burgdorferi sensu lato, a bacterium with a parasitic life-style, which is transmitted between hosts by the Ixodes tick-vector. Humans will incidentally become infected. The resulting illness can involve the skin, nervous system, joints and heart. Southern Sweden has been identified as an area endemic for Lyme borreliosis. The most common clinic
