Sökning: "instrumentation"

Visar resultat 21 - 25 av 174 uppsatser innehållade ordet instrumentation.

  1. 21. PCBA verification and fault detection using a low-frequency GMR-based near-field probe with magnetic closed-loop feedback compensation : A non-contact alternative to physical probing

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Joacim Sundh; [2022]
    Nyckelord :GMR; sensor; magnetic field; near-field; probe; linearity; PCB; coil; PCBA; analogue integrated circuits; analog; operational amplifiers; electrical fault detection; feedback circuits; in-circuit tests; GMR; sensor; magnetfält; närfält; sond; linjäritet; mönsterkort; spole; kretskort; analoga integrerade kretsar; operationsförstärkare; elektrisk feldetektering; återkopplingskretsar; kretskortstest;

    Sammanfattning : As electronics are getting both smaller and more advanced, the need to verify and validate remains and the means are getting more complex the more functions and components are added. Traditionally, in-circuit tests (ICTs) are performed by probing dedicated test points on the Printed Circuit Board Assembly (PCBA) in a test sequence that is unique to each product. LÄS MER

  3. 22. Prototype Instrumentation for Frequency Domain – Functional Near Infrared Spectroscopy

    Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Rohit Rathnam Nareshkumar; [2022]
    Nyckelord :Neurofeedback; Frequency domain fNIRS; vertical-cavity surface-emitting laser; silicon photomultiplier;

    Sammanfattning : Frequency domain functional near infrared spectroscopy (FD-fNIRS) is a tissue optical measurement technique used to measure absolute haemoglobin concentrations in brain tissue. This work is intended to be the first step in the development of a wearable, low-cost FD-fNIRS device for neurofeedback applications. LÄS MER

  4. 23. Discovering and masking environmental features in modern sandboxes

    Uppsats för yrkesexamina på avancerad nivå, Blekinge Tekniska Högskola/Institutionen för datavetenskap

    Författare :Alexander Ljungberg; Simon Smedberg; [2022]
    Nyckelord :Sandbox; Masking; Anti-VM; Anti-detection; Sandlåda; Maskering; Anti-VM; Antidetektering;

    Sammanfattning : Background. The awareness of cyber attacks in businesses is increasing with the rising number of cyber incidents for businesses. With nearly 350 000 new malware detected per day, there is a big incentive to allocate resources to company infrastructure to mitigate malware. These solutions require scalability not to become bottlenecks and expensive. LÄS MER

  5. 24. Constructing an optical tweezers instrumentation and evaluation of trapping stiffness using the power spectrum method

    Kandidat-uppsats, Umeå universitet/Institutionen för fysik

    Författare :Haoxiang Yang; [2022]
    Nyckelord :;

    Sammanfattning : Optical tweezers can trap micron-sized objects such as cells, bacteria, and microspheres, and has become an important instrument for measuring forces associated with various physical and biological phenomena. In this thesis work, I constructed an optical tweezers instrument to trap 2µm diameter beads using a HeNe-laser operating with a wavelength of 632. LÄS MER

  7. 25. Electric Propulsion for a High Altitude Unmanned Aerial Vehicle

    Kandidat-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Jacob Hjort Friderichsen; David Jönsson; [2022]
    Nyckelord :Electric Propulsion; UAV; ALPHA; Electronic Speed Controller; BLDC Motor; Propeller;

    Sammanfattning : The catalogue of observational platforms for space and atmospheric research can be expanded by utilising drones equipped with specialised instrumentation and capable of flying at high altitudes. In this project the requirements for an electric propulsion system applicable to the KTH Royal Institute of Technology ALPHA project are evaluated. LÄS MER