The BNL Laser-Electron Accelerator Facility (LEAF) uses a laser-pulsed photocathode, radio-frequency electron gun to generate ù7 ps pulses of 8.7 MeV electrons for pulse radiolysis experiments. The compact and operationally simple accelerator system includes synchronized laser pulses that can be used to probe or excite the electron-pulsed samples to examine the dynamics and reactivity of chemic...

For a subspace S of Cn and fixed basis, we study the compact convex set mS=convexhull {|s|2∈R≥0n:s∈S ‖s‖=1}≃{Diag(Y)∈Mnh(C):Y≥0,tr(Y)=1,PSYPS=Y}that call moment S, where |s|2=(|s1|2,|s2|2,…,|sn|2). This is relevant in determination minimal hermitian matrices (M∈Mnh such that ‖M+D‖≤D for every diagonal D spectral norm ‖⋅‖). We describe extremal points certain curves mS terms principal vectors mi...

The Nearest Neighbor (NN) algorithm is a well-known and effective classification algorithm. Prototype Selection (PS), which provides NN with a good training set to pick its neighbors from, is an important topic as NN is highly susceptible to noisy data. Accurate state-of-the-art PS methods are generally slow, which motivates us to propose a new PS method, called OWA-FRPS. Based on the Ordered W...

1 Introduction The aspps system is an answer-set programming system based on the extended logic of propositional schemata 2], which allows variables but not function symbols in the language. We denote this logic PS +. A theory in the logic PS + is a pair (D; P), where D is a set of ground atoms (only constant symbols as arguments) representing an instance of a problem (input data), and P is a s...

Prototype Selection (PS), i.e., search for relevant subsets of instances, is an interesting Data Mining problem. Original studies of Hart and Gates consisted in producing stepwise a Co~e’csed or Reduced set of prototypes, evaluated using the accuracy of a Nearest Neighbor rule. We present in this paper a new approach to PS. It is inspired by a recent cl~m~ification technique known as Boosting, ...