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@ARTICLE{Mak:207281,
      author       = {Mak, Rachel and Lerotic, Mirna and Fleckenstein, Holger and
                      Wild, Stefan M. and Leyffer, Sven and Sheynkin, Yefim and
                      Jacobsen, Chris and Vogt, Stefan},
      title        = {{N}on-{N}egative {M}atrix {A}nalysis for {E}ffective
                      {F}eature {E}xtraction in {X}-ray {S}pectromicroscopy},
      journal      = {Faraday discussions},
      volume       = {171},
      issn         = {1364-5498},
      address      = {Cambridge [u.a.]},
      publisher    = {Soc.},
      reportid     = {PUBDB-2015-01264},
      pages        = {357 - 371},
      year         = {2014},
      abstract     = {X-Ray absorption spectromicroscopy provides rich
                      information on the chemical organization of materials down
                      to the nanoscale. However, interpretation of this
                      information in studies of “natural” materials such as
                      biological or environmental science specimens can be
                      complicated by the complex mixtures of spectroscopically
                      complicated materials present. We describe here the
                      shortcomings that sometimes arise in previously-employed
                      approaches such as cluster analysis, and we present a new
                      approach based on non-negative matrix approximation (NNMA)
                      analysis with both sparseness and cluster-similarity
                      regularizations. In a preliminary study of the large-scale
                      biochemical organization of human spermatozoa, NNMA analysis
                      delivers results that nicely show the major features of
                      spermatozoa with no physically erroneous negative weightings
                      or thicknesses in the calculated image.},
      cin          = {FS-CFEL-1},
      ddc          = {540},
      cid          = {I:(DE-H253)FS-CFEL-1-20120731},
      pnm          = {Experiments at CFEL (POF2-544)},
      pid          = {G:(DE-H253)POF2-CFEL-Exp.-20130405},
      experiment   = {EXP:(DE-H253)CFEL-Exp-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000345529900019},
      pubmed       = {pmid:25415133},
      doi          = {10.1039/C4FD00023D},
      url          = {https://bib-pubdb1.desy.de/record/207281},
}