Essays about: "Gas sensing"

Showing result 6 - 10 of 33 essays containing the words Gas sensing.

  1. 6. Simulation of THz Quantum Cascade Lasers

    University essay from Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

    Author : Viktor Rindert; [2021]
    Keywords : Physics and Astronomy;

    Abstract : Quantum Cascade Lasers (QCLs) have since their invention in 1994 become a crucial source for mid-infrared and THz radiation. Mid-infrared QCLs have achieved room temperature operation while THz QCLs have not. As such, simulations are an important tool in order to achieve a THz QCL operational at room temperature. READ MORE

  3. 7. Detection of Amphetamine with Graphene Quantum Dots

    University essay from KTH/Tillämpad fysik

    Author : Carl Fredrik Åslund; [2021]
    Keywords : Graphene quantum Dots; Amphetamine; Sensor; GQD; Grafen kvantprickar; Amfetamin; Sensor; GQD;

    Abstract : Amphetamine abuse is an enduring problem in many developed nations, including Sweden. It causes lasting damage both to its users and in the form of increased strain on healthcare services. It is therefore critical that police be equipped with the tools necessary to rapidly and accurately identify any samples in order to combat this scourge. READ MORE

  4. 8. Graffiti Detection using a variable temperature MOx sensor and Machine Learning

    University essay from Lunds universitet/Matematisk statistik

    Author : Mikael Kristensson; Christian Clemedtson; [2021]
    Keywords : MOX sensor; variable temperature; machine learning; graffiti; spray paint; Support Vector Machine; k-Nearest Neighbour; neural network; Mathematics and Statistics;

    Abstract : MOx sensors are widely used for sensing gases. In this thesis a variable temperature MOx sensor was used to detect graffiti spray paint and differentiate it from other substances using the sensors sensitivity to different gases at different temperatures using machine learning. READ MORE

  5. 9. Comparing radar satellites. Use of Sentinel-1 leads to an increase in oil spill alerts in Norwegian waters

    University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Author : Ove Njøten; [2021]
    Keywords : Geography; GIS; Satellite; Radar; Oil spill; Earth and Environmental Sciences;

    Abstract : Radar’s ability to detect oil spills through clouds, fog, and darkness is a significant advantage. Oil spill alert services using radar satellites have been in use in Norway for more than 25 years. After introducing two radar satellites Sentinel-1A and 1B in 2015-2016, the number of oil spill alerts has increased by 250% in Norwegian waters. READ MORE

  6. 10. Characterization of Silicon Waveguides For Non-Dispersive Infrared Gas Sensors

    University essay from Luleå tekniska universitet/Rymdteknik

    Author : Sarah Zayouna; [2020]
    Keywords : ;

    Abstract : Carbon dioxide is an important gas for life on Earth. But as human activities have been expanding throughout modern history, the CO2 concentration in the atmosphere is increasing. High concentrations of carbon dioxide can lead to various consequences, such as climate change and poor air quality both indoors and outdoors. READ MORE