| We present a transformation based, multi-grained data modeling technique in the context of text independent speaker recognition, aimed at mitigating diicul-ties caused by sparse training and test data. Both identi-cation and veriication are addressed, where we view the entire population as divided into the target population and its complement, which we refer to as the background population. F...

Real world software systems require continuous change to satisfy new user requirements, adapt to new technologies and repair errors. As time goes by, software increase in size and complexity, and their design gradually decay unless work is done to maintain the systems. The problem of understanding the evolution of software has become a vital matter in today’s software industry. In this thesis w...

Low-temperature friction-stir welding (FSW) was successfully applied for the joining of Al-Mg-Mn alloy with an ultrafine-grained microstructure. The low-temperature conditions preserved fine-grained microstructure and nano-scale second-phase particles in stir zone thus provided nearly-100% joint efficiency produced welds. deformation behavior welded joints studied via digital image correlation ...

The paper presents a geometrical model for protein secondary structure analysis which uses only the positions of the Cα-atoms. We construct a space curve connecting these positions by piecewise polynomial interpolation and describe the folding of the protein backbone by a succession of screw motions linking the Frenet frames at consecutive Cα-positions. Using the ASTRAL subset of the SCOPe data...

Structural transformations caused by coarse-grained powdering and fine-grained mechanochemical milling in a dry mode were probed in high-temperature modification of tetra-arsenic tetra-sulfide known as β-As4S4. In respect to X-ray diffraction analysis, the characteristic sizes of β-As4S4 crystallites in these coarse- and fine-grained powdered pellets were 90 and 40 nm, respectively. Positron an...