Essays about: "Ren"

Showing result 21 - 25 of 331 essays containing the word Ren.

  1. 21. Quantum Transport in Topological Insulator Nanowires

    University essay from KTH/Fysik

    Author : Sergi Pradas Rodriguez; [2023]
    Keywords : quantum transport; topological insulators; nanowires; numerical analysis; Kwant; etc.; kvanttransport; topologiska isolatorer; nanotrådar; numerisk analys; Kvant; etc.;

    Abstract : Three-dimensional topological insulators are materials that have a bulk band gap like a traditional insulator, but which hold topologically protected conducting surface states. In this thesis we present a numerical analysis of the surface states of topological insulator nanowires in the tight-binding approximation. READ MORE

  2. 22. Biogas Potential in the North of Sweden : Inventory and Techno-Economic Assessment of Substrates for an Increased Biogas Production in Norrbotten

    University essay from Lunds universitet/Kemiteknik (CI)

    Author : Alma Fahlén Hammar; [2023]
    Keywords : Biogas; anaerobic digestion; AD; Norrland; bioenergy; fossil-free; chemical engineering; Chemistry; Technology and Engineering;

    Abstract : Great investments are planned in the north of Sweden the coming years, not the least in the county of Norrbotten where the projects collectively are referred to as the green transition due to the focus on fossil-free techniques. But to be able to secure a sustainable energy supply and reach the goal set by the member states of the European Union of a carbon dioxide neutral union in 2050 the production of alternative energy sources needs to intensify. READ MORE

  3. 23. Analysis of the effect of continuity of care on the quality of life in patients with Chronic Obstructive Pulmonary Disease : A literature review

    University essay from Högskolan i Gävle/Avdelningen för vårdvetenskap

    Author : Wanting Deng; Xiao Ren; [2023]
    Keywords : ;

    Abstract : Background: In 2017, there were approximately 300 million people with COPD.Because COPD cannot be fully rehabilitated and causes a huge impact on patients'quality of life, the Global Initiative for Chronic Obstructive Lung Diseaserecommended long-term medication and disease management to urgently improvepatients' quality of life. READ MORE

  4. 24. Condition monitoring of a linear rail and carriage system through vibration analysis

    University essay from KTH/Skolan för industriell teknik och management (ITM)

    Author : Johan Hultenheim; [2023]
    Keywords : ;

    Abstract : Condition-based maintenance is a highly relevant topic as its implementation can save both components and man-hours. Downtime is often expensive in industrial environments because machines are expensive investments; often, the machines are also part of a larger production line where it is of great importance that no bottlenecks occur. READ MORE

  5. 25. In-situ Growth of Sn-seeded GaAs and GaSb Nanowire Heterostructures

    University essay from Lunds universitet/Centrum för analys och syntes

    Author : Azemina Kraina; [2023]
    Keywords : nanowire; heterostructure; ETEM; MOCVD; TEM; in-situ; Sn; GaAs; GaSb; materials chemistry; Technology and Engineering; Chemistry;

    Abstract : One of the ways to utilize III-V nanowires, is to make use of the possibility to combine materials and create heterostructures which allows for creating material combinations with new properties. A special interest can be taken into Sb-containing nanowires due to the high electron mobility, however there has been reported difficulties with switching to other materials because of a 'memory effect' where Sb lingers in the system and nanowire. READ MORE