Sökning: "Mathematic"

Visar resultat 16 - 20 av 22 avhandlingar innehållade ordet Mathematic.

1. 16. Maintenance Consideration for Long Life Cycle Embedded System

   Författare :Xiaozhou Meng; Benny Thörnberg; Mattias O'Nils; Mittuniversitetet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning :      In this thesis, the work presented is in relation to consideration to the maintenance of a long life cycle embedded system. Various issues can present problems for maintaining a long life cycle embedded system, such as component obsolescence and IP (intellectual property) portability. LÄS MER

3. 17. Tryckt bild eller avbildat tryck? : Visuella representationer av begrepp relaterade till tryck i fysikläroböcker för högstadiet

   Författare :Charlotte Lagerholm; Utbildningsvetenskap; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Representations; Lower secondary school; Physics textbooks; Multimodality; Affordance;

   Sammanfattning : AbstractIn this study visual representations of the concept of pressure in five physics textbooks for lower secondary school have been analysed in terms of how they communicate the concept of pressure, and also how these representations work together to explain what pressure is. Examples of visual representations are fonts, photographs, sketches, tables or mathematic formulas. LÄS MER

4. 18. 3D Magnetic Photonic Crystals : Synthesis and Characterization

   Författare :Mei Fang; K.Venkat Rao; Lyubov Belova; Rajeev Ahuja; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; magnetic photonic crystals; photonic band gaps; Fe3O4 nanoparticles; silica; Optical physics; Optisk fysik; Materials science; Teknisk materialvetenskap;

   Sammanfattning : This thesis presents the synthesis methods and the characterizations of magnetic Fe3O4 nanoparticles, silica spheres with Fe3O4 nanoparticles embedded, and three dimensional magnetic photonic crystals (MPCs) prepared from the spheres. The structure, material composition, magnetic and optical properties, photonic band gaps (PBGs), as well as how these properties depend on the concentration of the magnetic nanoparticles, are investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), vibrating sample magnetometer (VSM), superconducting quantum interference device (SQUID), Faraday rotation (FR) and optical spectrophotometers. LÄS MER

5. 19. Assessment and Remediation for Children with Special Educational Needs : The role of Working Memory, Complex Executive Function and Metacognitive Strategy Training

   Författare :Petri Partanen; Örjan Sundin; Jan Lisspers; Billy Jansson; Ann-Charlotte Smedler; Mittuniversitetet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Children with special educational needs; Assessment; Working memory; Working memory training; Complex executive function; Planning; Metacognition; Mathematical learning difficulties; Barn i behov av stöd; Utredning; Arbetsminne; Arbetsminnesträning; Komplex exekutiv funktion; Planering; Metakognition; Matematiksvårigheter;

   Sammanfattning : The overall aim of this thesis was to explore the role of different assessment tools and training regimens in assessment and remediation for children with special educational needs in school. A central purpose of assessment explored was that it should inform remediation, teaching and instruction. LÄS MER

7. 20. Generalized Bandpass Sampling Receivers for Software Defined Radio

   Författare :Yi-Ran Sun; Svante Signell; Markku K. Renfors; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Radio receivers; Software Defined Radio SDR ; uniform nonuniform sampling; reconstruction; bandpass sampling; noise aliasing; sampling jitter; generalized bandpass sampling; complex signal processing; complex FIR and IIR filter design; Switched-Capacitor SC circuit; Electrical engineering; Elektroteknik;

   Sammanfattning : Based on different sampling theorem, for example classic Shannon’s sampling theorem and Papoulis’ generalized sampling theorem, signals are processed by the sampling devices without loss of information. As an interface between radio receiver front-ends and digital signal processing blocks, sampling devices play a dominant role in digital radio communications. LÄS MER