Sökning: "sporadic"

Visar resultat 6 - 10 av 264 avhandlingar innehållade ordet sporadic.

  1. 6. 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. 7. Three Aspects of Real-Time Multiprocessor Scheduling: Timeliness, Fault Tolerance, Mixed Criticality

    Författare :Risat Pathan; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Mixed-Criticality Systems; Fault-Tolerant Scheduling; Fixed Priority; Real-Time Systems; Global Multiprocessor Scheduling; Time Redundancy; Sporadic Tasks;

    Sammanfattning : The design of real-time systems faces two important challenges: incorporating more functions/services on existing hardware to make the system more attractive to the market, and deploying existing software on multiprocessors (e.g., multicore) to utilize moreprocessing power. LÄS MER

  4. 8. Molecular aspects of post-Chornobyl and sporadic papillary thyroid carcinoma

    Författare :Andrii Dinets; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :papillary thyroid carcinoma;

    Sammanfattning : Papillary thyroid carcinoma (PTC) exhibits various molecular abnormalities, both when sporadic and radiation-related. PTC is still diagnosed in adult individuals who were younger than 18 years at the time of the Chornobyl accident in 1986 and lived within the contaminated area. LÄS MER

  5. 9. Event-Based Control and Estimation with Stochastic Disturbances

    Författare :Toivo Henningsson; Institutionen för reglerteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; event-based control; stochastic control; event-based estimation; control over networks; quantized measurements; sporadic control; embedded control;

    Sammanfattning : This thesis deals with event-based control and estimation strategies, motivated by certain bottlenecks in the control loop. Two kinds of implementation constraints are considered: closing one or several control loops over a data network, and sensors that report measurements only as intervals (e.g. with quantization). LÄS MER

  7. 10. Molecular Genetic Studies of Sporadic and MEN1-Associated Endocrine Pancreatic Tumors

    Författare :Daniel Lindberg; Gunnar Westin; Göran Åkerström; Bo Wängberg; Uppsala universitet; []
    Nyckelord :Surgery; pancreatic endocrine tumor; MEN1; LOH; WNT7A; HDAC11; CDK4; CDKN2B p15; CDKN1B p27; CDKN2C p18; c-Myc; Smad4; pyrosequencing; epigenetic; methylation; tumor suppressor; Kirurgi;

    Sammanfattning : Pancreatic endocrine tumors (PETs) may cause typical syndromes of hormone excess, or appear clinically non-functioning without hormonal symptoms. PETs occur sporadically, in association with the multiple endocrine neoplasia type 1 (MEN1) syndrome, or rarely the von Hippel-Lindau syndrome. LÄS MER