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Auflistung nach Autor:in "Laner, David"

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  • Konferenzbeitrag
    Attribute-based data quality evaluation in regional Material Flow Analysis
    (EnviroInfo & ICT4S, Adjunct Proceedings, 2015) Schwab, Oliver; Laner, David; Rechberger, Helmut
    A method for data quality evaluation in macro scale MFAs such as national resource budgets is presented. MFA data is never totally accurate but may have certain defects. The four information defects semantic, representativeness, provenance and context are introduced. These information defects are considered to be functions of data attributes. Data attributes are assigned to MFA data according to an existing framework. A method for quantification of information defects and for expressing the data quality of a flow by a single number is presented. It provides opportunities for understanding and evaluating resource budgets, their a priori information basis and their information content.
  • Konferenzbeitrag
    Data reconciliation under fuzzy constraints applied to wood flows in Austria
    (EnviroInfo & ICT4S, Adjunct Proceedings, 2015) Dzubur, Nada; Laner, David
    Material flow analysis deals with gathering, harmonizing, and analyzing data about physical flows and stocks from different sources with varying quality in order to quantify the material turnover of a defined system. As data availability and quality is limited, there is uncertainty that the available data represent the actual value of interest. In the present study this degree of belief is expressed via fuzzy sets, which specify the possible range of values of the input data. The input data are forced to comply with the mass balance constraints given by the material flow model. As a result, possible ranges are calculated for each flow and consistency levels are determined to identify flows which are in good agreement with the model and flows which are hardly consistent. The method is illustrated using a sub-system of the Austrian wood flow model as a case study.