A batch is a group of nodes that have to transmit a single packet each to a common receiver in the shortest time. Most of existing batch resolution algorithms assume immediate feedback and generally neglect the feedback time, being considered much shorter than the packet transmission time. This conjecture, however, fails to apply in many practical high-rate wireless systems, with the consequenc...

This contribution deals with controlling of semi-batch reactor used for chromium sludge regeneration process. A comparison of three process control approaches is presented. Usual PID controller without online identification (OI) and adaptive PID controller were adapted to semi-batch rector process in our previous studies. The new one two-degree-offreedom (2DOF) controller is developed for the s...

In AfricaCrypt 2012 and ACNS 2014, several algorithms are proposed for the batch verification of ECDSA signatures. In this paper, we make a comparative study of these methods for the Edwards curve digital signature algorithm (EdDSA). We describe the adaptation of Algorithms N, N′, S2′ and SP for EdDSA signatures. The randomization methods are also explained in detail. More precisely, we study s...

Batch production plants provide a wide range of scheduling problems. In pharmaceutical industries a batch process is usually described by a recipe, consisting of an ordering of tasks to produce the desired product. In this research work we focused on pharmaceutical production processes requiring the culture of a microorganism population (i.e. bacteria, yeasts or antibiotics). Several sources of...

A bacterium, Pseudomonas aeruginosa (ATTC27853), was investigated for its ability to grow and to degrade phenol as sole carbon source, in aerobic batch culture. The parameters which affect the substrate biodegradation such as the adaptation of bacteria to phenol, the temperature, and the nature of the bacteria were investigated. The results show that for a range of temperature of 30 to 40°C, th...

measurement system analysis is a vital component for many quality improvement initiatives. It is important to assess the ability of a measurement system to detect meaningful differences in process variables. In many instances, it is possible to design an experiment in which the level of variation attributed to the operator, parts and the operator by part interaction effect can be assessed. This...

The aim of this study was to produce microbial oil from Lipomyces starkeyi DSM 70296 grown in hemicellulose hydrolysate (H-H). Glucose and xylose were used for batch, fed-batch, repeated fed-batch, and continuous cultures, and H-H was tested at continuous culture. The highest cell and lipid concentrations of 85.4 and 41.8g/L, respectively, were obtained using repeated fed-batch strategy. Contin...

The manufacture of high-value products involves many different batch processes, for example industrial fermenters. Such processes require high levels of consistency in their operation to ensure minimal losses of raw materials, utilities and product. Recent application studies have indicated that multivariate statistical technology can provide some support when trying to maintain consistent oper...