Roberto Colella

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Feature selection becomes a central task when ’signature’ profiles specific to a pathological status have to be extracted from high dimensional gene expression or proteomic data. In the present paper, we propose a feature selection method based on Singular Value Decomposition (SVD) and apply it to SELDI-TOF/MS proteomic data from a cohort of Type 2(More)
The mechanism for resonant scattering in LaMnO(3) has been the subject of some controversy between two models. Model (A) is based on orbital ordering, whereas model (B) invokes the Jahn-Teller distortion. From the structural point of view, the two models lead to different d-electron densities. The forbidden reflection 300 is turned on by resonance, leading(More)
We have observed dynamical diffraction in the [[(02402̅ 4) and [[(04604̅ 6) reflections of the icosahedral quasicrystal AlPdMn in the back-reflection geometry ( θB = 90°). The x-ray fluorescence from the Al and Pd atoms exhibits strong standing wave behavior, similar to that observed in crystalline materials. The data indicate a long-range order of each(More)
The resonant multiple Bragg x-ray diffraction is used to study the forbidden (104) reflection in LaMnO3. Using the interference between the three-beam scattering and resonant scattering we can determine the phase of the resonant scattering. This phase is shown to be consistent with a model in which the resonant scattering is caused by the influence of the(More)
In the last few decades, sensor networks have received significant attention in the field of ambient intelligence (AmI) for surveillance and assisted living applications, as they provide a powerful tool to capture relevant information about environments and human activities. Mobile robots hold promise for enhancing the potential of sensor networks toward(More)
Y. Zhang, S. N. Ehrlich, R. Colella,* M. Kopecky, and M. Widom Department of Physics, Purdue University, West Lafayette, Indiana 47907-1396 Brookhaven National Laboratory, NSLS, Upton, New York 11973 Sincrotrone Trieste, SS 14-Km 163.5, Area Science Park, 34012 Basovizza Trieste, Italy Department of Physics, Carnegie Mellon University, Pittsburgh,(More)