Sökning: "sporadic sources"

Visar resultat 1 - 5 av 12 avhandlingar innehållade orden sporadic sources.

  1. 1. Radio meteors above the Arctic Circle : radiants, orbits and estimated magnitudes

    Författare :Csilla Szasz; Asta Pellinen-Wannberg; Noah Brosch; Umeå universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; meteors; meteoroids; dust; meteor radiants; meteoroid orbits; sporadic sources; radar; meteorradianter; meteoroidbanor; sporadiska källområden; radar; meteorer; meteoroider; interplanetärs stoft; Space engineering; Rymdteknik;

    Sammanfattning : This thesis presents results based on data collected with the 930 MHz EISCAT UHF radar system and three SKiYMet specular meteor radars. It describes in detail a method for meteoroid orbit calculation. The EISCAT UHF system comprises three identical 32 m parabolic antennae: one high-power transmitter/receiver and two remote receivers. LÄS MER

  3. 2. Le Miroir historial de Jean de Noyal : Livre X : édition du ms. Paris, BnF, fr. 10138 avec introduction, notes et index

    Författare :Per Förnegård; Anders Bengtsson; Jane Nystedt; David Trotter; Stockholms universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Jean de Noyal; Miroir historial; chronique universelle; moyen français; Saint-Vincent; compilation; édition critique; index verborum; index nominum; Languages and linguistics; Språkvetenskap;

    Sammanfattning : In the 1380s, Jean de Noyal, Abbot of the Benedictine monastery of Saint Vincent in Laon between 1367 and 1396, authored his universal history, the Miroir Historial. The mirror, which described the history of the world from the creation until the year 1380, originally comprised 12 books, presumably organized into three volumes. LÄS MER

  4. 3. Risk characterization of familial cancer using the Swedish family-cancer database with a special reference to breast cancer

    Författare :Pauli Vaittinen; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Familial cancer; genetic epidemiology; register study; standardized relative risk.;

    Sammanfattning : This thesis reports on epidemiological studies on family related cancer in Sweden. The Family-Cancer Database was constructed in 1996 from several national registries. Family relations were available from the Generation register, cancer cases from the Cancer registry and socioeconomic information from Censuses. LÄS MER

  5. 4. Spectral and Temporal Studies of Gamma-Ray Bursts

    Författare :Luis Borgonovo; Claes-Ingvar Björnsson; Jerry Fishman; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Astronomy and astrophysics; Astronomi och astrofysik; Astronomy; astronomi;

    Sammanfattning : Gamma-ray bursts (GRBs) are sporadic flashes of light observed primarily in the gamma-ray band. Being the brightest explosions in the Universe since its birth, they are at present also the furthest astronomical sources detected. LÄS MER

  7. 5. Evolution and host-specific adaptations of Legionella pneumophila

    Författare :Anaísa B. Moreno; Lionel Guy; Dan I. Andersson; Fredrik Söderbom; Alexander W. Ensminger; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Evolution; Legionella pneumophila; host-adaptation; experimental evolution; Acanthamoeba castellanii; transfection; Mikrobiologi; Microbiology;

    Sammanfattning : How bacteria evolve pathogenic traits is shaped by their communities and environments. Legionella pneumophila is ubiquitous in aquatic habitats, where it persists by replicating within a broad range of protozoan hosts. Using the same mechanisms, L. LÄS MER