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Smaller size and lower weight are always the targets of the power electronic product development. This work introduces two new topologies of auxiliary converters which have the feature of fewer components and fewer number of energy conversion stages comparing with the conventional auxiliary converter used in railway applications. The initial proposal of the proposed new topology is based on the id
In the home garden, people inevitably interact with a multitude of non-human actors, including plants. Home gardeners get involved with, and affect, the growth, life and death of other individuals through activities such as weeding and pruning. In this article, the authors discuss people’’s everyday interactions with ‘‘nature’’ in their own gardens, with a specific focus on plants. Despite their r
I denna artikel analyseras upptakten till det moderna miljömedvetandets genombrott i Skandinavien åren kring 1970 från ett kunskapshistoriskt perspektiv. Studien tar sin utgångspunkt i det samtida mottagandet av den svenske Norgeambassadören Rolf Edbergs debattbok om mänsklighetens ödesfrågor hösten 1966. Boken gavs ut samtidigt på de tre skandinaviska språken vilket har öppnat upp för en gränsöve
I detta kapitel illustreras relationen mellan populärkultur och marknad ur ett historiskt perspektiv via ett äldre material om biogående och biosituationen på 1940- och 50-talen. Jämförelse görs mellan nu och då i syfte att se både kontinuitet och förändring. Historiskt perspektiv används som metodologiskt grepp för att se vår egen tid genom att visa på det populärkulturella kretsloppets betydelse
Despite their rootedness, plants do move and are moved between different places in the garden, and from one garden to another. In many private gardens there are plants with a history, and owners who tell stories about how they were brought in from a different location, for example from an old relative or from a journey. These plants are often regarded as relics or souvenirs, and receive special at
The Sectra MicroDose Mammography system is based on direct photon counting (with a solid-state detector), and a substantially lower dose to the breast than when using conventional systems can be expected. In this work absorbed dose measurements have been performed for the first unit used in routine mammography screening (at the Hospital of Helsingborg, Sweden). Two European protocols on dosimetry
BACKGROUND: Damage control is valuable in hemodynamically unstable trauma patients. To improve the hemostasis of packing, topical hemostatic agents have been suggested. The effects of such agents are unclear in trauma situations. The purpose of this study was to investigate the hemostatic capacity, and the stability of the hemostatic clot, of four substances with different mode of action in an exp
Carbamylated erythropoietin (CEPO) is a novel neuroprotective agent that does not bind to the classical erythropoietin receptor or affect hematocrit. Since CEPO has not been systematically studied in a fully blinded and randomized manner in an embolic stroke model, we determined if CEPO would be useful to attenuate clinical deficits associated with multiple infarct ischemia using the rabbit small
Biogas produced by anaerobic digestion is often used in gas turbines to produceelectricity. In order to increase the value of the gas and to enable utilization of the gas in other applications, it may be advantageous to upgrade the biogas. In this way, the carbon dioxide as well as various impurities are removed and biomethane is produced. Biomethane is similar to natural gas and can be used in si
Languages differ in how events are described, but little is known about how semantics interacts with online event processing. This study targets this question examining placement events in Swedish. Swedish has three obligatory placement verbs for events where objects have support from below: sätta ’set’, ställa ’stand’, and lägga ’lay’. Swedish lacks a superordinate general term like English put (
Are anti-vibration gloves the solution to the problem of hand-arm vibration?Vibrations from hand-held machinery are a major problem in the Swedish labour force. In 2009, 14% of men and 3% of women of employed in Sweden reported exposure to hand-arm vibration at least a quarter of their working time according to the Swedish Work Environment Authority (Arbetsmiljöverket 2010). It is tempting to imag
In the ancient corpus of Aesopic fables gods and semi-gods from Greek and Roman mythology often appear. Most commonly Zeus is called upon by fable characters such as the donkey, the snake, and the turtle, all of them pleading for a better destiny. Frequent main characters, rather often promoting their own interests in the fable fictions, are also Hera, Herakles, Apollo, and Hermes. The high esteem
Contents: Ingmar Bergman as "Ingmar Bergman" (Jan Holmberg), THX 1138: A Portrait of the Artist as an Angry Young Man (Andrew Gordon), Shamans, Sex Beasts and Abuse: Mother-Son Relationships in Popular and Cult Cinema (Charles Jason lee), Neo-Splatter: Bride of Chucky and the Horror of Heteronormative (Judith Halberstam), The Irrational Enlargement of Queen Kong (IQ Hunter), Pictures of the Lands
Contents: Editorial (Michael Tapper), Errol Morris' Forms of Control (Ira Jaffe), Masao Adachi: Portrait of a Radical in Cinema and Politics (Johannes Schönherr), Paranoia Pictures Presents... (Michael Coyne), The Heroism of Disobediance and Deceit: Where Is the Friend's Home? (Robin Wood). Reviews: books, dvds, film festivals.
Contents: Women, Religion and the Video Film in Nigeria (Onookome Okome), Craig Baldwin: A Visual Essay (Patrik Sjöberg), Revenge Is Sweet: The Bitterness of Audition (Robin Wood), British Film Noir: Dark Shadows Around Pinewood and Ealing (Robert Murphy), Heroes: Otto Preminger (Tag Gallagher). Reviews: books, dvds.
Bark beetles face challenges and trade-offs during host selection, imposed by lethal tree defences, lower nutrition and higher competition in less well-defended trees, scarcity and ephemeral distribution of susceptible hosts, limitation of suitable hosts to one beetle generation, and relatively short lifespan and vulnerability of adults during host searching. Beetles contend with these challenges
