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Displaying results 1 to 3 of 3.

  1. Detection and Prevention of MAC Layer Misbehavior for ad hoc Networks
    Author: Cardenas, Alvaro A.; Radosavac, Svetlana; Baras, John S.
    Published: 2004
    Publisher:  Defense Technical Information Center

  2. Second-stage sampling for conflict areas
    methods and implications
    Author: Himelein, Kristen; Eckman, Stephanie; Murray, Siobhan; Bauer, Johannes
    Published: March 2016
    Publisher:  World Bank Group, Poverty and Equity Global Practice Group, Washington, D.C.

    The collection of survey data from war zones or other unstable security situations is vulnerable to error because conflict often limits the implementation options. Although there are elevated risks throughout the process, this paper focuses... more

    Location:
    Staatsbibliothek zu Berlin - Preußischer Kulturbesitz, Haus Unter den Linden
    Inter-library loan:
    Unlimited inter-library loan, copies and loan

     

    The collection of survey data from war zones or other unstable security situations is vulnerable to error because conflict often limits the implementation options. Although there are elevated risks throughout the process, this paper focuses specifically on challenges to frame construction and sample selection. The paper uses simulations based on data from the Mogadishu High Frequency Survey Pilot to examine the implications of the choice of second-stage selection methodology on bias and variance. Among the other findings, the simulations show the bias introduced by a random walk design leads to the underestimation of the poverty headcount by more than 10 percent. The paper also discusses the experience of the authors in the time required and technical complexity of the associated back-office preparation work and weight calculations for each method. Finally, as the simulations assume perfect implementation of the design, the paper also discusses practicality, including the ease of implementation and options for remote verification, and outlines areas for future research and pilot testing

     
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    Volltext (kostenfrei)
    Source: Staatsbibliothek zu Berlin
    Language: English
    Media type: Book
    Format: Online
    Other identifier:
    hdl: 10986/24158
    Series: Policy research working paper ; 7617
    Subjects: Politische Instabilität; Datenerhebung; Statistischer Fehler; Random Walk; Mogadischu; Somalia; ADMINISTRATIVE RECORDS; ADMINISTRATIVE RECORDS; AGE; ALGORITHMS; BACK OFFICE; BACK-OFFICE; BEST PRACTICE; BUSINESS; CALCULATION; CASE; CASES; CELL PHONES; CLASSIFICATION; CLUSTERING; COMPUTER; CONFIDENCE INTERVALS; CONFIDENCE INTERVALS; COUNTING; DATA COLLECTION; DATA COLLECTION; DESCRIPTION; DOCUMENT; EFFECTS; ENUMERATION; EQUIPMENT; ERRORS; ESTIMATES; ESTIMATING; HUMAN ERROR; IMAGE; IMAGES; IMPLEMENTATION PLANS; IMPLEMENTATIONS; INFORMATION; INTERVIEWS; MEASUREMENT; MEASURES; METHODOLOGIES; METHODOLOGY; METHODS; MISSING VALUES; MISSING VALUES; MODELING; MONITORING; NAVIGATION; NETWORK; OBJECT; OPEN ACCESS; PERFORMANCE; PHONES; PILOT TESTING; PRECISION; PREDICTION; PROBABILITIES; PROBABILITY; PROBABILITY SAMPLES; PROTOCOL; PROTOCOLS; RANDOM SAMPLING; RANDOM SAMPLING; RANDOM WALK; RANDOM WALK; RESEARCH; RESEARCH WORKING PAPERS; RESEARCHERS; RESULT; RESULTS; RISK; ROUTING; SAMPLE DESIGN; SAMPLE DESIGN; SAMPLE SIZE; SAMPLE SIZE; SAMPLES; SAMPLING; SAMPLING DESIGNS; SATELLITE; SCENARIOS; SEARCH; SECURITY; SIMULATION; SIMULATIONS; SIZE; SMART PHONES; SOFTWARE; SPACE; STANDARD; STANDARD DEVIATION; STANDARD DEVIATION; STANDARDS; STATISTICS; SUPERVISION; SURVEY DATA; SURVEY DATA; SURVEY METHODOLOGY; SURVEY METHODOLOGY; SURVEYS; TARGET; TECHNICAL TRAINING; TECHNICAL TRAINING; TECHNIQUES; TECHNOLOGY; TESTING; THEORY; VARIABLES; VERIFICATION; WEB; WEIGHT; WEIGHTING; WWW
    Scope: 1 Online-Ressource (circa 33 Seiten), Illustrationen
  3. Second-stage sampling for conflict areas
    methods and implications
    Author: Himelein, Kristen; Eckman, Stephanie; Murray, Siobhan; Bauer, Johannes
    Published: March 2016
    Publisher:  World Bank Group, Poverty and Equity Global Practice Group, Washington, D.C.

    The collection of survey data from war zones or other unstable security situations is vulnerable to error because conflict often limits the implementation options. Although there are elevated risks throughout the process, this paper focuses... more

    Location:
    Orient-Institut Beirut
    Signature:
    Online
    Inter-library loan:
    No inter-library loan

    Location:
    Staatsbibliothek zu Berlin - Preußischer Kulturbesitz, Haus Potsdamer Straße
    Inter-library loan:
    No inter-library loan

    Location:
    Universitätsbibliothek Clausthal
    Inter-library loan:
    No inter-library loan

    Location:
    Niedersächsische Staats- und Universitätsbibliothek Göttingen
    Inter-library loan:
    No inter-library loan

    Location:
    Helmut-Schmidt-Universität, Universität der Bundeswehr Hamburg, Universitätsbibliothek
    Inter-library loan:
    No inter-library loan

    Location:
    Fachhochschule Kiel, Zentralbibliothek
    Inter-library loan:
    No inter-library loan

    Location:
    ZBW - Leibniz-Informationszentrum Wirtschaft, Standort Kiel
    Signature:
    VS 2 (7617)
    Inter-library loan:
    No inter-library loan

    Location:
    Leuphana Universität Lüneburg, Medien- und Informationszentrum, Universitätsbibliothek
    Inter-library loan:
    No inter-library loan

     

    The collection of survey data from war zones or other unstable security situations is vulnerable to error because conflict often limits the implementation options. Although there are elevated risks throughout the process, this paper focuses specifically on challenges to frame construction and sample selection. The paper uses simulations based on data from the Mogadishu High Frequency Survey Pilot to examine the implications of the choice of second-stage selection methodology on bias and variance. Among the other findings, the simulations show the bias introduced by a random walk design leads to the underestimation of the poverty headcount by more than 10 percent. The paper also discusses the experience of the authors in the time required and technical complexity of the associated back-office preparation work and weight calculations for each method. Finally, as the simulations assume perfect implementation of the design, the paper also discusses practicality, including the ease of implementation and options for remote verification, and outlines areas for future research and pilot testing

     
    Export to reference management software   RIS file
      BibTeX file
    Content information
    Volltext (kostenfrei)
    Source: Staatsbibliothek zu Berlin
    Language: English
    Media type: Book
    Format: Online
    Other identifier:
    hdl: 10986/24158
    Series: Policy research working paper ; 7617
    Subjects: Politische Instabilität; Datenerhebung; Statistischer Fehler; Random Walk; Mogadischu; Somalia; ADMINISTRATIVE RECORDS; ADMINISTRATIVE RECORDS; AGE; ALGORITHMS; BACK OFFICE; BACK-OFFICE; BEST PRACTICE; BUSINESS; CALCULATION; CASE; CASES; CELL PHONES; CLASSIFICATION; CLUSTERING; COMPUTER; CONFIDENCE INTERVALS; CONFIDENCE INTERVALS; COUNTING; DATA COLLECTION; DATA COLLECTION; DESCRIPTION; DOCUMENT; EFFECTS; ENUMERATION; EQUIPMENT; ERRORS; ESTIMATES; ESTIMATING; HUMAN ERROR; IMAGE; IMAGES; IMPLEMENTATION PLANS; IMPLEMENTATIONS; INFORMATION; INTERVIEWS; MEASUREMENT; MEASURES; METHODOLOGIES; METHODOLOGY; METHODS; MISSING VALUES; MISSING VALUES; MODELING; MONITORING; NAVIGATION; NETWORK; OBJECT; OPEN ACCESS; PERFORMANCE; PHONES; PILOT TESTING; PRECISION; PREDICTION; PROBABILITIES; PROBABILITY; PROBABILITY SAMPLES; PROTOCOL; PROTOCOLS; RANDOM SAMPLING; RANDOM SAMPLING; RANDOM WALK; RANDOM WALK; RESEARCH; RESEARCH WORKING PAPERS; RESEARCHERS; RESULT; RESULTS; RISK; ROUTING; SAMPLE DESIGN; SAMPLE DESIGN; SAMPLE SIZE; SAMPLE SIZE; SAMPLES; SAMPLING; SAMPLING DESIGNS; SATELLITE; SCENARIOS; SEARCH; SECURITY; SIMULATION; SIMULATIONS; SIZE; SMART PHONES; SOFTWARE; SPACE; STANDARD; STANDARD DEVIATION; STANDARD DEVIATION; STANDARDS; STATISTICS; SUPERVISION; SURVEY DATA; SURVEY DATA; SURVEY METHODOLOGY; SURVEY METHODOLOGY; SURVEYS; TARGET; TECHNICAL TRAINING; TECHNICAL TRAINING; TECHNIQUES; TECHNOLOGY; TESTING; THEORY; VARIABLES; VERIFICATION; WEB; WEIGHT; WEIGHTING; WWW
    Scope: 1 Online-Ressource (circa 33 Seiten), Illustrationen