Abstract: The invention relates to novel metal complexes useful as catalysts in redox reactions (such as, hydrogen (H2) production). In particular, the invention provides novel transition metal (e.g., cobalt (Co) or nickel (Ni)) complexes, in which the transition metal is coupled with N,N-Bis(2-pyridinylmethyl)-2,2?-Bipyridine-6-methanamine (DPA-Bpy), 6?-((bis(pyridin-2-ylmethyl)amino)methyl)-N,N-dimethyl-2,2?-bipyridin-6-amine (DPA-ABpy), or a derivative thereof. The invention also relates to a method of producing H2 from an aqueous solution by using the metal complex as a catalyst. In certain embodiments, the invention provides a metal complex of the formulae as described herein.

Abstract: One aspect of the invention provides a method for training a classification algorithm to detect a retinal pathology. The method includes: for a plurality of pseudo two-dimensional data sets of one-dimensional data points, each pseudo two-dimensional data point representing RNFL thickness values for a subject and corresponding index values for the data points: performing fractal analysis on the data set to calculate a plurality of fractal dimensions and calculating a plurality of slopes between each fractal dimension; combining the plurality of slopes for subjects labeled as pathologic into a pathologic data set; combining the plurality of slopes for subjects labeled as healthy into a healthy data set; and applying a linear discriminant function the pathologic data set and the healthy data set; thereby training a classification algorithm to detect the retinal pathology.

Abstract: One aspect of the invention provides a theft detection node including: a power source; an accelerometer; a gyroscope; a transmitter; and a microcontroller in communication with the power source, the motion detector, and the transmitter. The microcontroller is programmed to determine whether the theft detection node is being transported and, if the theft detection node is being transported: estimate the distance traveled between successive stops and transmit the estimated distance to a server. Another aspect of the invention provides a method of determining a path traveled by a node. The method includes: generating a Hidden Markov Model having a plurality of hidden states, each hidden state corresponding to a road segment; receiving information from the node about one or more turns and the distance traveled between successive stops; and determining the most likely path for the distance between successive stops and a distance between successive turns.