Search for dissertations about: "fingerprints"

Showing result 1 - 5 of 70 swedish dissertations containing the word fingerprints.

  2. 1. Wood Fingerprints : Recognition of Sawn Wood Products

    Author : Tobias Pahlberg; Cris Luengo; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Träproduktutveckling; Wood Products Engineering;

    Abstract : This thesis deals with wood fingerprints and presents ways to track sawn wood products through an industrial process using cameras. The possibility to identify individual wood products comes from the biological variation of the trees, where the genetic code, environment and breakdown process creates a unique appearance for every board. READ MORE

  4. 2. Fingerprints of planktivory : paleolimnological evidence of past fish community structure and dynamics

    Author : Emma Åhlén; Marko Reinikainen; Tom Korsman; Pär Byström; Timo Kairesalo; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; planktivory; foraging efficiency; cladoceran remains; Bosmina; planktivore community capacity; PCC; Ceriodaphnia; reserrection; zooekologi; Animal Ecology;

    Abstract : Planktivorous fish affect the species composition, size and morphology of their zooplankton prey by size selective predation. Remains of cladocerans are deposited in the lake sediments and this microfossil community hence reflects the historical changes in the planktivore fish community. READ MORE

  5. 3. Dioxins and dioxin-like compounds in thermochemical conversion of biomass : formation, distribution and fingerprints

    Author : Qiuju Gao; Stina Jansson; Bogdan Dlugogorski; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Polychlorinated dibenzo-p-dioxins; polychlorinated dibenzofurans; polychlorinated naphthalenes; PCDD; PCDF; PCN; persistent organic pollutants; torrefaction; pyrolysis;

    Abstract : In the transition to a sustainable energy supply there is an increasing need to use biomass for replacement of fossil fuel. A key challenge is to utilize biomass conversion technologies in an environmentally sound manner. READ MORE

  6. 4. Managing and Exploring Large Data Sets Generated by Liquid Separation - Mass Spectrometry

    Author : Daniel Bäckström; Per Sjöberg; Rolf Danielsson; Thomas Moritz; Uppsala universitet; []
    Keywords : Analytical chemistry; liquid chromatography; capillary electrophoresis; capillary electrochromatography; mass spectrometry; electro spray ionization; chemometrics; multivariate data analysis; peptide; biomarkers; fingerprints; PCA; alignment; data compression; ANOVA; target correlation; data management; Analytisk kemi;

    Abstract : A trend in natural science and especially in analytical chemistry is the increasing need for analysis of a large number of complex samples with low analyte concentrations. Biological samples (urine, blood, plasma, cerebral spinal fluid, tissue etc. READ MORE

  7. 5. Symmetry Filters Applied to Fingerprints : Representation, Feature extraction and Registration

    Author : Kenneth Nilsson; Högskolan i Halmstad; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fingerprint recognition; symmetry filters; orientation field; multiscale filtering; singular points; orientation radiograms; registration; multiexpert; TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : A common framework for feature extraction in fingerprints is proposed by use of certain symmetries. The proposal includes representation, filters, and filtering techniques for common features including minutiae points, singular points and the ridge and valley patterns. READ MORE