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Carp (Cyprinus carpio) were exposed to perfluoroalkyl acids (PFAAs) including perfluorooctane sulfonate (PFOS) isomers in an artificially contaminated sediment/water microcosm. The uptake constant of PFAAs increased with increasing carbon chain length, whereas the elimination coefficient displayed the opposite trend, suggesting that carbon chain length(More)
Face recognition is a challenging visual classification task, especially when the lighting conditions can not be controlled. In this paper, we present an automatic face recognition system in the near in-frared (IR) spectrum instead of the visible band. By making use of the near infrared band, it is possible for the system to work under very dark visual(More)
Audio-and video-based person authentication has gained significant attention. Common databases are crucial for comparative evaluation of algorithms. Almost all of the publicly available databases contain im-ages/videos captured in visible illumination. In this paper we present an acquisition system and procedure for collection of a multi-modal database(More)
Biomagnification of perfluoroalkyl substances (PFASs) are well studied in marine food webs, but related information in fresh water ecosystem and knowledge on fractionation of their isomers along the food web are limited. The distribution, bioaccumulation, magnification, and isomer fractionation of PFASs were investigated in a food web of Taihu Lake, China.(More)
Nowadays there is a high demand on non-intrusive, user-friendly authentication systems. A strong focus of the research community lies in face recognition systems. Many of the proposed systems operate under visible illumination. There are several databases for training and evaluation of those systems available. However, we claim that operating a face(More)