With the widespread use of mobile systems, there is a growing demand for apps that can enable users to collaboratively use multiple mobile systems, including hardware device features such as cameras, displays, speakers, microphones, sensors, and input. We present M2, a system for multi-mobile computing by enabling remote sharing and combining of devices across multiple mobile systems. M2 levera...

Using results on Hadamard difference sets, we construct regular graphical Hadamard matrices of negative type of order 4m4 for every positive integerm. Ifm > 1, such a Hadamard matrix is equivalent to a strongly regular graph with parameters (4m4, 2m4 + m2,m4 + m2,m4 + m2). Strongly regular graphs with these parameters have been called max energy graphs, because they have maximal energy (as defi...