Essays about: "Resonance circuit"

Showing result 1 - 5 of 9 essays containing the words Resonance circuit.

  1. 1. Electrical Impedance Profiling of Plants, Coffee and TREO

    University essay from Uppsala universitet/Signaler och system

    Author : Adam Bushara; Sebastian Daniel Clyne; [2022]
    Keywords : ;

    Abstract :  The aim of the project was to investigate the possibility of using low-cost hardware to monitor plant health, measure the impedance of water containing dissolved substances at different concentrations, and observe how the plant impedance is affected compared to auxiliary measurements of soil moisture, ambient light, humidity, and temperature.To measure impedance, we used electrical impedance spectroscopy which gives the impedanceacross a spectrum of frequencies. READ MORE

  3. 2. The adolescent brain on social-media : A systematic review

    University essay from Högskolan i Skövde/Institutionen för biovetenskap

    Author : Michaela Åström; [2021]
    Keywords : Adolescence; neuroimaging; social brain; social rewards; social-media use SMU ;

    Abstract : Adolescence is an exceptional period of life, not least in terms of social and brain development. Friends become increasingly important, susceptibility to peer rejection increases, and brain regions involved in social cognition are predicted to go through major changes. READ MORE

  4. 3. Design of Resonant Filters for AC Current Magnification : Heating of Li-ion Batteries by Using AC Currents

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Nikolina Djekanovic; [2018]
    Keywords : Current control; injection of alternating current; internal heat dissipation; LCL filter; Lithium-ion batteries; power efficiency; resonance phenomenon;

    Abstract : Using alternating current in order to heat batteries at sub-zero temperatures is a method,which is investigated in-depth by an increasing number of study groups. The thesis considersthe resonance phenomenon with the intention to use alternating current amplificationand battery’s impedance in order to induce power dissipation inside the battery, and in thisway increase its temperature. READ MORE

  5. 4. Acoustic Analysis of Wave-Guide and MEMS Microphone in Camera Including Thermoviscous Losses

    University essay from Blekinge Tekniska Högskola

    Author : Karolis Poskus; [2018]
    Keywords : ;

    Abstract : Today Micro Electrical Mechanical Systems (MEMS) microphones are available in a range of electronic consumer products such as smart phones, tablets, smartwatches and surveillance cameras. The MEMS microphones are usually attached to a circuit board with a hole that lets sound propagate through, as well as additional wave-guides which alter the MEMS microphones original frequency response. READ MORE

  6. 5. Self-Tuning NFC Circuits

    University essay from Mittuniversitetet/Avdelningen för elektronikkonstruktion

    Author : Yimeng Li; [2017]
    Keywords : Parallel capacitance compensation; RFID system; NFC; Self-tuning NFC; Digitally tunable capacitor;

    Abstract : Contactless automatic identification procedures which are called RFID systems (Radio-frequency Identification) have become very popular in recent years for transferring power and data. With the development of RFID technology, the demand of easy transmitting of short data packages has made NFC (Near-field Communication) technology wildly used especially in mobile applications. READ MORE