Essays about: "70 s"

Showing result 1 - 5 of 565 essays containing the words 70 s.

  1. 1. Morphological study of PS/PMMA-matrix on glass, related to vapour pressure, mass-fraction, and size

    University essay from Karlstads universitet/Institutionen för ingenjörs- och kemivetenskaper (from 2013)

    Author : Gustav Larsson; [2023]
    Keywords : organic solar cells; polymer; morphology; film; AFM;

    Abstract : The objective of this study is to observe how changing amount or ratio between dried mixes of poly-methyl-methacrylate and poly-styrene change the surface appearance, and how the results might inform future design of Organic photovoltaic cells, whom are based on polymer mixtures and heavenly dependent on the arrangement of polymers. An atomic force microscope was used on glass surfaces coated in a poly-methyl-methacrylate/poly-styrene matrix and dried from either dichloromethane or ethyl-acetate to determine surface appearance. READ MORE

  3. 2. Hardware Subsystem Proposal of an Off-Vehicle Battery Analyzer from a Charging/Discharging Perspective

    University essay from Högskolan Väst/Institutionen för ingenjörsvetenskap

    Author : Rinor Gashi; Tim Johansson; [2023]
    Keywords : battery electric vehicles; power conversion module; off-vehicle battery packs;

    Abstract : Electric Vehicles (EVs) are seen as one of the solutions to some of the world’s global current problems, such as global warming and air pollution, due to non-existent operational emissions and increased efficiency. There are multiple types of EVs, one of them being Battery Electric Vehicles (BEVs) which in most cases utilizes a Li-Ion battery pack as energy storage. READ MORE

  4. 3. Consumers’ willingness to pay for food safety attributes of nectarines : A discrete choice experiment in the Polokwane Municipality of Limpopo, South Africa

    University essay from SLU/Dept. of Economics

    Author : Kgodisho Tshipidi Mashego; [2023]
    Keywords : Food safety attributes; willingness to pay; discrete choice experiments; conditional logit; nectarines;

    Abstract : Consumer concerns about food safety are growing, and there is an increasing demand for quality fruits and vegetables. As such, fruit control procedures and standards should be based on understanding consumers’ choices and preferences. READ MORE

  5. 4. Incorporation of Environmental Features into Peacebuilding Initiatives at Three Actor Leadership Levels : A Case Study of Liberia

    University essay from Linnéuniversitetet/Institutionen för samhällsstudier (SS)

    Author : Mathilda Olsson; [2023]
    Keywords : Environmental Peacebuilding; Conflict; Natural resources; Forest resources; Forest resource management; Human needs; Actors in peacebuilding; Community forestry; Liberia;

    Abstract : Environmental change and degradation, and increasing intrastate armed conflict are two pressing challenges of our time. Regions with highest rates of intrastate armed conflict have shown to overlap with regions of highest dependency on natural resources for livelihood provision and survival, where research of interrelatedness between conflict and environmental degradation, the environment-conflict nexus, increased during the 1990s. READ MORE

  6. 5. Exploration of using Twitter data to predict Swedish political opinion polls with neural networks

    University essay from Lunds universitet/Matematisk statistik

    Author : Alexander Gren; Klara Lundgren; [2023]
    Keywords : Mathematics and Statistics;

    Abstract : This thesis aims to explore the possibility of using deep learning techniques to mine opinions on Twitter, with the objective to predict the political opinion distribution in Sweden. Different methods of gathering and annotating training data are evaluated to achieve accurate and reliable predictions. READ MORE