Sökning: "Johan Jansson"

Visar resultat 16 - 20 av 42 avhandlingar innehållade orden Johan Jansson.

  1. 16. A New Audiometric Bone Vibrator, Radioear B81, and the Bone Conduction Implant with Emphasis on Magnetic Resonance Imaging

    Författare :Karl-Johan Fredén Jansson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; image artifact; magnetically induced torque; balanced electromagnetic separation transducer; magnetic resonance imaging.; bone vibrator; bone conduction; retention magnet; demagnetization;

    Sammanfattning : Hearing by air conduction (AC) and bone conduction (BC) are attributed to be the natural ways of stimulating the cochlea. With AC hearing, the cochlea is stimulated by air pressure variations via the ear canal, whereas with BC hearing, sound vibrations are transmitted thru the skull bone to the cochlea. LÄS MER

  3. 17. The Balanced Electromagnetic Separation Transducer for Bone Conduction Audiometry and Hearing Rehabilitation

    Författare :Karl-Johan Fredén Jansson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; retention magnet; bone vibrator; demagnetization; bone conduction; balanced electromagnetic separation transducer; magnetically induced torque; image artifact; magnetic resonance imaging;

    Sammanfattning : Hearing via air conduction (AC) and bone conduction (BC) are attributed to bethe natural ways of conducting sound to the cochlea. With AC hearing, air pressurevariations are transmitted to the cochlea via the ear canal, whereas with BChearing, sound vibrations are transmitted through the skull bone to the cochlea. LÄS MER

  4. 18. Studies in Local Public Transport Demand

    Författare :Johan Holmgren; Jan Owen Jansson; Lars Westin; Linköpings universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Public transport; Demand; Elasticity; Price; Service; Time series; Panel data; Kollektivtrafik; Efterfrågan; Elasticitet; Pris; Trafikutbud; Inkomst; Bilinnehav; Tidsserieanalys; Paneldata; Economics; Nationalekonomi;

    Sammanfattning : This thesis consists of four papers where the overall purpose is to contribute to the understanding of how local public transport demand is affected by different factors. An underlying theme running trough the thesis is the two-way relationship between public transport demand and the service level caused by the fact that capacity and quality are joint products. LÄS MER

  5. 19. Identification Techniques for Mathematical Modeling of the Human Smooth Pursuit System

    Författare :Daniel Jansson; Alexander Medvedev; Peter Stoica; Johan Schoukens; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nonlinear system identification; biomedical signal processing; Elektroteknik med inriktning mot reglerteknik; Electrical Engineering with specialization in Automatic Control;

    Sammanfattning : This thesis proposes nonlinear system identification techniques for the mathematical modeling of the human smooth pursuit system (SPS) with application to motor symptom quantification in Parkinson's disease (PD). The SPS refers to the complex neuromuscular system in humans that governs the smooth pursuit eye movements (SPEM). LÄS MER

  7. 20. Vad kommer på provet? : Gymnasielärares provpraxis i samhällskunskap

    Författare :Tobias Jansson; Lars Petterson; Curt Räftegård; Johan Samuelsson; Gunilla Näsström; Karlstads universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; assessment practices; tests; knowledge; upper secondary school; frame factors; Bloom s revised taxonomy; bedömning; prov; kunskaper; gymnasielärare; provpraxis; Blooms reviderade taxonomi; ramfaktorer; Subject didactics; Ämnesdidaktik; Civics; Samhällsvetenskap; Statsvetenskap; Political Science;

    Sammanfattning : The aim of this study is to investigate the assessment practices of civics teachers in upper secondary school. The main purpose is to analyze, using Bloom’s revised taxonomy, which kind of knowledge civics teachers test in their written test examinations. The analyses show that they mainly test factual and conceptual knowledge. LÄS MER