Essays about: "Vibrational signals"

Showing result 1 - 5 of 8 essays containing the words Vibrational signals.

  1. 1. Vibrational signals as indicators of soil fauna health? : A novel approach to environmental monitoring of ants

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Joel Fransson Forsberg; [2023]
    Keywords : Vibrations; Formica ants; Vibrometer; Vibrational signals; Imidacloprid; Before-After-Control-Impact;

    Abstract : Soil fauna provides processes of crucial importance for ecosystem functions, but our ability to observe their actions often depend on destructive methods where the integrity of the studied environment (the soil) is compromised. In this study, I develop and test a new generation of environmental monitoring tools that utilize vibrations made by soil macrofauna to inform about their performance and health. READ MORE

  3. 2. Towards a sustainable pest management of the invasive bug Halyomorpha halys in Trentino province, Italy

    University essay from SLU/Dept. of Biosystems and Technology (from 130101)

    Author : Damiano Moser; [2019]
    Keywords : Brown Marmorated Stink Bug; H. Halys; hemiptera; biotremology; Semi-Structured Interview; Thematic Analysis; invasive species; stakeholder perception;

    Abstract : Some invasive insects are agricultural pests, like the brown marmorated stinky bug (BMSB), an extremely phytophagous pentatomids. The lack of efficient low-impact control strategies makes this insect extremely dangerous for agricultural crops. In Italy, the first established populations of BMSB were found in 2012. READ MORE

  4. 3. A comparative study regarding weakly stationarity assumptions and time dependency : Signal processing of vibrational loading and its influence on fatigue life

    University essay from Linnéuniversitetet/Institutionen för maskinteknik (MT)

    Author : Rikard Dahlman; Ebba Johansson; [2018]
    Keywords : Stationarity; Test for weakly stationarity; Reverse arrangements test; Runs test; Signal processing; Fatigue life; Time dependency; Piecewise weakly stationary.;

    Abstract : Simplifications regarding calculations of fatigue life due to vibrational loading is based on weakly stationarity assumptions which is a time independent method. The hypothesis was based on the uncertainty of these assumptions. The aim of this study was to examine whether the analysed data fulfilled the assumptions of weakly stationarity. READ MORE

  5. 4. Development of a Vehicle Simulation Model Consisting of Low and High Frequency Dynamics

    University essay from Linköpings universitet/Fordonssystem

    Author : Dennis Belousov; [2016]
    Keywords : Vehicle dynamics; simulation model; parameter estimation; road profile characteristics; power spectral density;

    Abstract : As vehicle testing on existing vehicles is both time and resource consuming, the work of testing safety algorithms on vehicle is desired to be made more efficient. Therefore the goal of this thesis is to study and develop a vehicle simulation model that can simulate desired dynamics of existing and non-existing vehicles. READ MORE

  6. 5. Application of Diode Laser Molecular Absorption Spectroscopy for Studies of Gas Concentrations in Food Packages

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Atomfysik

    Author : Jan Von Keitz; [2014]
    Keywords : Diode Laser Spectroscopy Gas Concentration Food Packages; Physics and Astronomy;

    Abstract : When it comes to absorbing and emitting radiation, molecules show similar properties as atoms do. A signicant dierence though, is that a molecular spectrum consists of notably more absorption lines compared to an atomic spectrum. READ MORE