Essays about: "DB"

Showing result 21 - 25 of 301 essays containing the word DB.

  1. 21. Analysis of radio surveillance in search of missing persons - An empirical study of Bluetooth Low Energy and Wi-Fi characteristics

    University essay from Linköpings universitet/Kommunikations- och transportsystem; Linköpings universitet/Tekniska fakulteten

    Author : Mikael Fredriksson; [2022]
    Keywords : Search and rescue; Wi-Fi; Bluetooth Low Energy; Wi-Fi probes; Bluetooth Low Energy advertisements; wireless sniffing; smartphones; antenna directivity;

    Abstract : Development of technical and methodological support has been identified as a key area for future research and development within the search and rescue (SAR) of missing persons in Sweden. Previous studies have demonstrated the feasibility of using Wi-Fi signals to locate a missing person, and also developed hardware and software for SAR systems based around Unmanned Aerial Vehicles (UAV). READ MORE

  3. 22. Analysis of the recent uptake andimpact of NoSQL databases incompanies : The practices, concept and challenges of NoSQL

    University essay from Blekinge Tekniska Högskola

    Author : Linnea Gullmak; [2022]
    Keywords : considerations; NoSQL; uptake; companies;

    Abstract : Context: Data is at the heart of any information system. Choosing the appropriate database and its operation is a major decision for any company and choosing from the pool of different options can can feel overwhelming. In this thesis we take a look at the main factors to consider when making your decision, to help you with the whole process. READ MORE

  4. 23. Antenna Options for High Altitude IMT Base Stations (HIBS) in Cellular Networks

    University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Author : Harald Magnusson; [2022]
    Keywords : High altitude IMT Base Station HIBS ; High Altitude Platform Station HAPS ; Link Feasibility; Coverage Feasibility; Phased Array Antenna; Parabolic Reflector Antenna;

    Abstract : This thesis is the result of a collaboration between Ericsson AB and Luleå University of Technology. A feasibility study has been conducted to investigate antenna options for the HIBS access link. The study contains two parts. Firstly, a link budget investigating the gain required from the antenna. READ MORE

  5. 24. Empirical Verification of an Acoustic Estimation of a Rocket Engine : A Comparison Between Estimated and Measured Noise of a Rocket Engine

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

    Author : Elina Arvidsson; [2022]
    Keywords : Esrange Space Centre; Flame deflector; Acoustic estimation; Liquid rocket engine; Rocket Factory Augsburg; Jet acoustics; Esrange Space Centre; Flammdeflektor; Akustisk estimering; vätskedriven raketmotor; Rocket Factory Augsburg; strömningsakustik;

    Abstract : The noise of a rocket engine is a complex and complicated phenomenon which has been studied for more than half a century [1]. There are many sources to this noise, but due to its great potential impact to the surrounding structures, including the vehicle itself, it is important to have a model to estimate the acoustic environment the engine produces. READ MORE

  6. 25. Low-profile fully-metallic Luneburg lens antenna

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Justine Djounidi; [2022]
    Keywords : Beam Scanning; Luneburg Lens Antenna; Fully-metallic; Millimeter Wave; Vinkelskanning; Luneburg Linsantenn; Fullt Metalliskt; Millimetervåg;

    Abstract : Modern communication systems face new technological challenges, such as the narrowness and overload of the conventional frequency bands employed for these applications. Nowadays, communication systems are expected to operate at higher frequencies, such as the mm-wave band. READ MORE