Sökning: "Accuracy and Precision"

Visar resultat 1 - 5 av 305 avhandlingar innehållade orden Accuracy and Precision.

  1. 1. In Vivo Accuracy and Precision in Prosthodontics

    Författare :Robert Nedelcu; Andreas Thor; Ingela Nyström; Pontus Olsson; Per Vult von Steyern; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; accuracy; precision; in vivo; digital impression; intraoral scanner; polyether impression; implant impression; framework misfit; fully edentulous; Oral and Maxillofacial Surgery; Käkkirurgi; Oral and Maxillofacial Surgery; Käkkirurgi;

    Sammanfattning : Background: There has been a dramatic increase in commercially available intraoral scanners (IOS) in the last decade, offering to replace indirect digitization of models (MOD) fabricated from impressions (IMPR). IOS has benefits of less patient discomfort and a faster workflow to fabricate fixed dental prosthesis (FDP), and implant-supported prostheses (IFD). LÄS MER

  3. 2. Physics-based modelling and measurement of advanced manufacturing machinery’s positioning accuracy : Machine tools, industrial manipulators and their positioning accuracy

    Författare :Nikolas Alexander Theissen; Andreas Archenti; Edward P. Morse; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machine tools; Industrial robots; Accuracy; Measurement instruments; Production Engineering; Industriell produktion;

    Sammanfattning : Advanced manufacturing machinery is a corner stone of essential industries of technologicallydeveloped societies. Their accuracy permits the production of complexproducts according to tight geometric dimensions and tolerances for high efficiency,interchangeability and sustainability. LÄS MER

  4. 3. Development of ultra-precision tools for metrology and lithography of large area photomasks and high definition displays

    Författare :Lars Peter Ekberg; Lars Mattsson; Lars Stiblert; Richard Leach; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ultra precision 2D metrology; LCD-display; OLED-display; nm-resolution; random phase measurement; large area; photomask; acousto-optic deflection; self-calibration; Z-correction; absolute accuracy; uncertainty.; SRA - Production; SRA - Produktion;

    Sammanfattning : Large area flat displays are nowadays considered being a commodity. After the era of bulky CRT TV technology, LCD and OLED have taken over as the most prevalent technologies for high quality image display devices. LÄS MER

  5. 4. Bias and Precision in Biomechanical Exposure Assessment : Making the Most of our Methods

    Författare :Jennie Jackson; Svend Erik Mathiassen; Eva Vingård; Mikael Forsman; Peter Johnson; Högskolan i Gävle; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; measurement strategy; accuracy; inclinometry; electromyography; EMG; upper arm; shoulder; low back; lumbar; thoracic; Health-Promoting Work; Hälsofrämjande arbete;

    Sammanfattning : Background: Insufficient exposure assessment is a suggested contributing factor to the current lack of clearly characterised relationships between occupational biomechanical risk factors and musculoskeletal disorders. Minimal attention has been paid to the potential bias of measurement tools from expected true values (i.e. LÄS MER

  7. 5. Ultra precision metrology : the key for mask lithography and manufacturing of high definition displays

    Författare :Peter Ekberg; Lars Mattsson; Torgny Carlsson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ultra precision metrology; LCD-display; OLED-display; nm-resolution; large area; random phase measurement; acousto-optic deflection; scanning; 2D measurement; mask; CCD; CMOS; image processing; edge detection; TECHNOLOGY; TEKNIKVETENSKAP; Manufacturing engineering; Produktionsteknik;

    Sammanfattning : Metrology is the science of measurement. It is also a prerequisite for maintaining a high quality in all manufacturing processes. In this thesis we will present the demands and solutions for ultra-precision metrology in the manufacturing of lithography masks for the TV-display industry. LÄS MER