This article addresses the ability of Parallel Distributed Processing (PDP) networks to generate stagewise cognitive development in accordance with Piaget’s theory of cognitive epigenesis. We carried out a replication study of the simulation experiments by McClelland (1989) and McClelland and Jenkins (1991) in which a PDP network learns to solve balance scale problems. In objective tests motiva...

UNLABELLED We have developed a program for automatic identification of domains in protein three-dimensional structures. Performance of the program was assessed by three different benchmarks: (i) by comparison with the expert-curated SCOP database of structural domains; (ii) by comparison with a collection of manual domain assignments; and (iii) by comparison with a set of 55 proteins, frequentl...

Dear Editor, Pachydermoperiostosis (PDP; Online Mendelian Inheritance in Man #614441) is a rare hereditary disease characterized by distinctive digital clubbing, periostosis and pachydermia. Patients with PDP harbor homozygous mutations in the solute carrier organic anion transporter family member 2A1 gene (SLCO2A1) or the 15-hydroxyprostaglandin dehydrogenase gene (HPGD), resulting in elevated...

We analyze the point decomposition problem (PDP) in binary elliptic curves. It is known that PDP in an elliptic curve group can be reduced to solving a particular system of multivariate non-linear system of equations derived from the so called Semaev summation polynomials. We modify the underlying system of equations by introducing some auxiliary variables. We argue that the trade-off between l...

Disilver(I) palladium(II) diphosphate, Ag(2)PdP(2)O(7), is isotypic with Na(2)PdP(2)O(7). It consists of infinite diphosphato-pallad-ate(II) [Pd(P(2)O(7))(2/2)](2-) ribbons with the Pd(II) ion in an almost square-planar coordination ( symmetry) and the P(2)O(7) group exhibiting 2 symmetry. The [Pd(P(2)O(7))(2/2)](2-) ribbons are linked by distorted [AgO(6)] octa-hedra. (31)P-MAS NMR studies on ...

Approximate ripple carry adders (RCAs) and carry lookahead adders (CLAs) are presented which are compared with accurate RCAs and CLAs for performing a 32-bit addition. The accurate and approximate RCAs and CLAs are implemented using a 32/28nm CMOS process. Approximations ranging from 4to 20-bits are considered for the less significant adder bit positions. The simulation results show that approx...

Models are abstract representations of reality that are built, analyzed and manipulated to augment the understanding of that reality. They can either be mental or codified but, in both cases, they contribute to good decision-making by ensuring that the right people use the right information at the right time. In order to reduce time to market, companies commonly adopt product development proces...

Decisions about product development in mass customization (MC) are crucial but complex. It is suggested the use of Decision Support Systems (DSS) to improve decision-making within the product development process (PDP) in mass customization systems to better serve not only to organizational demands, as well as to market demands. Thus, we conducted an exploratory literature review aiming to ident...

The present paper describes the work done at SLAC for the magnetostrictive wire spark chambers of SPEAR, LASS and the two-meter streamer chamber. All three are CAMAC systems based on the use of a time digitizer module with different interfacing techniques into three different computers (Sigma 5, PDP-9, PDP-11). Of particular interest is a display controller module that permits wide selection of...