Given a square matrix mat, return the sum of the matrix diagonals. Only include the sum of all the elements on the primary diagonal and all the elements on the secondary diagonal that are not part of ...

sum+=mat[i][mat.length-1 - i]; //secondary diagonal element if(mat.length%2==0) return sum; //matrix with even length will not have a center else return sum-mat[mat ...

Abstract: Satellite communications (SatCom) face fundamental security challenges due to their inherent broadcast nature. To address this, we exploit beyond-diagonal reconfigurable intelligent surface ...

All procedures were performed under protocols approved by the Northwestern University Institutional Animal Care and Use Committee. Three adult rhesus macaque ...

The Matrix universe is waking up again, and this time the questions feel bigger than ever. With familiar faces returning, the line between reality and control starts to blur in new ways. This chapter ...

Robert Kelly is managing director of XTS Energy LLC, and has more than three decades of experience as a business executive. He is a professor of economics and has raised more than $4.5 billion in ...