Citric acid is mainly produced by solid state fermentation by the filamentous fungus Aspergillus niger. Production of citric acid depends strongly on an appropriate strain and on operational conditions such as aeration, type and concentration of carbon source, nitrogen and phosphate limitation, pH, temperature, concentration of trace elements and morphology of the producer organism. The yield o...

Intruders on the Internet often prefer to launch network intrusions indirectly, i.e., using a chain of hosts on the Internet as relay machines using protocols such as Telnet or SSH. This type of attack is called a stepping-stone attack. In this paper, we propose and analyze algorithms for stepping-stone detection using ideas from Computational Learning Theory and the analysis of random walks. O...

Rsat is a DPLL–based solver that inherits many of the effective techniques introduced by MiniSat [3, 4] and Zchaff [6]. Rsat employs three improvements that have proven quite effective empirically. First, it employs techniques for reducing the time spent on Boolean constraint propagation. Next, it introduces a new technique that enables the solver to better focus on subproblems. Finally, Rsat e...

243 Address for correspondence: Salvatore Chirumbolo, MD, PhD, Laboratory of Physiopathology of Obesity Department of Medicine-University of Verona, LURM Est Policlinico GB Rossi, Piazzale AL Scuro 10, 37134 Verona-Italy, Tel +390458128456, Fax +390458027403 e-mail: [email protected] DOI: 10.5603/PiAP.2015.0040 Received: 11.03.2015 Copyright © 2015 PTChP ISSN 0867–7077 Salvatore Chi...

In this work, we investigate the ability of a Chunking GA (ChGA) to reduce the size of variable length chromosomes and control bloat. The ChGA consists of a standard genetic algorithm augmented by a communal building block memory system and associated memory chromosomes and operators. A new mxn MaxSum fitness function used for this work is also described. Results show that a ChGA equipped with ...

Chaff cloud is widely used in target covering. In this paper, a jamming performance estimation strategy presented for the elliptical and cubic chaff clouds. The range profiles of composite models plane with are experimentally accessed an anechoic chamber using stepped-frequency waveform measurement system. Then, dimensions, characteristic length, distributing entropy equivalent scattering cente...

Abstract Waterhemp ( Amaranthus tuberculatus [Moq.] Sauer) escapes are common in midwestern U.S. soybean [ Glycine max (L.) Merr.] fields due to the continued rise herbicide-resistant (HR) populations. In a conventional harvesting system, weed seeds harvested with crop grain and spread back on field. Harvest seed control methods such as chaff lining concentrate seed-bearing into narrow row (cha...

Classical conditioning is at the heart of most learning phenomena. It is thus essential that we develop accurate models of conditioning; since, psychological models rely heavily in verbal accounts that are necessarily imprecise it has become apparent that the development of computational models is imperious. However, we need to separate the wheat from the chaff. In this paper we review the main...

We demonstrate a SIMD C++ genetic programming system on a single 128 node parallel nVidia GeForce 8800 GTX GPU under RapidMind’s GPGPU Linux software by predicting ten year+ outcome of breast cancer from a dataset containing a million inputs. NCBI GEOGSE3494 contains hundreds of Affymetrix HG-U133A and HG-U133B GeneChip biopsies. Multiple GP runs each with a population of 5 million programs win...