Essays about: "dirt"

Showing result 1 - 5 of 73 essays containing the word dirt.

  1. 1. The German Imigrants in New Knoxville, Ohio

    University essay from Uppsala universitet/Institutionen för arkeologi och antik historia

    Author : Birgitta Sundell-Rånby; [2023]
    Keywords : Agriculture; German immigration; habitus; historic archaeology; landscape archaeology; Agrikultur; tyska immigranter; habitus; historisk arkeologi; landskaps arkeologi;

    Abstract : America is a nation of immigrants and all immigrants brought culture with them. There is not one American culture. Many Ohioans are descended from German ancestors, their German heritage is still present in the cultural and social landscapes. German immigrants came to America in search of farmland and independence. READ MORE

  3. 2. Yearly distribution and composition of per- and polyfluoroalkyl substances (PFAS) in Luleå wastewater treatment plant

    University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Author : Moa Sjöberg; [2023]
    Keywords : PFAS; WWTP; Wastewater treatment; Consumer products; Precursors;

    Abstract : PFAS (per- and polyfluoroalkyl substances) are a large group of substances that are used in a large variety of products because of their unique water and dirt repellent properties. The substances are extremely persistent and can spread over large distances in groundwater, surface water, and in the air, which makes them an environmental and a health concern. READ MORE

  4. 3. Support for autonomously driven systems in harsh environments. : Degree project for Master of Science in mechanical engineering with focus on innovation and sustainable product development

    University essay from Blekinge Tekniska Högskola/Institutionen för maskinteknik

    Author : Mohammed Aljafari; [2023]
    Keywords : Sensor; Temperature measurement; Maintenance free; Autonomous system; Sensor; Temperatmätning; Underhållsfri; Autonomt system; Design thinking;

    Abstract : Symptoms of harsh environments create pressure on autonomous machines to work wellwith the use of measurement devices. Sensors used within construction equipment vehiclessuffer from being covered with fogs of dirt, oil, water, and dust. READ MORE

  5. 4. Developing an Ar milling process to improve the contact quality to InAs nanowires

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Fasta tillståndets fysik

    Author : Chris Mkolongo; [2023]
    Keywords : InAs nanowires; Argon milling; Technology and Engineering;

    Abstract : The aim of this work was to develop a stable and reproducible argon milling process for InAs nanowires to remove the native oxide layer that increases electrical resistance. This was done by identifying a few milling parameters and studying them in relation to the milling rate of silicon dioxide (SiO2). READ MORE

  6. 5. Xylem Water Filtration

    University essay from Lunds universitet/Industridesign

    Author : David Wenner; [2023]
    Keywords : Technology and Engineering; Arts and Architecture;

    Abstract : This project explored the usage and effectiveness of a natural water filtration system using xylem from Picea Abies, or Norway Spruce. The project is concentrated on the region of southeast and south Asia where people suffer from water contamination, providing a concept of a water filter with comprehensive protection against waterborne diseases. READ MORE