A high speed group communication middleware can considerably improve performance of multi-agent systems. Sama is a fast and scalable group communication middleware for mobile agents. It achieves scalability and low message delivery time by dis tributing message dissemination load among all mobile agent servers. Sama uses Message Dispatcher Objects (MDOs), which are special objects on each agent...

Kirsch, with Public Sector Committee deputy chairperson and OSD negotiator, Dr Pophi Ramathuba, and backed by some key SAMA committees, want SAMA restructured into at least three business units to improve the lot of disparate interest groups. They say the new business model would address what they described as a long-standing systemic problem that makes scapegoats of SAMA chairpersons forced by...

Aspergillus nidulans reproduces asexually with single nucleated conidia. In apsA (anucleate primary sterigmata) strains, nuclear positioning is affected and conidiation is greatly reduced. To get further insights into the cellular functions of apsA, aconidial apsA strains were mutagenized and conidiating suppressor strains were isolated. The suppressors fell into two complementation groups, sam...

Three-dimensional (3D) culture models are critical tools for understanding tissue morphogenesis. A key requirement for their analysis is the ability to reconstruct the tissue into computational models that allow quantitative evaluation of the formed structures. Here, we present Software for Automated Morphological Analysis (SAMA), a method by which epithelial structures grown in 3D cultures can...

Provision of fast and scalable group communication for mobile agents can considerably improve their efficiency. Unfortunately, most of the existing approaches do not scale well when the number of agents grows. In this paper, we propose Sama, a new group communication mechanism, to speed up message delivery to a group of mobile agents. The main contribution of Sama is distribution and paral-leli...

In this paper, we describe our work on developing and evaluating detailed OPNET simulation models of an enhanced Very Small Aperture Terminal (VSAT) satellite Internet gateway and an enhanced satellite hub based on Cerona SkySPAN technology with capacity and latency optimizations in the return channel so as to allow significantly higher number of users and a better user experience. The Cerona S...

Surrogate-Assisted Memetic Algorithm(SAMA) is a hybrid evolutionary algorithm, particularly a memetic algorithm that employs surrogate models in the optimization search. Since most of the objective function evaluations in SAMA are approximated, the search performance of SAMA is likely to be affected by the characteristics of the models used. In this paper, we study the search performance of usi...

Twenty-five years ago, Gaggioli, Sama and Qian published a series of 10 “second law guidelines” for design and process engineers, nicknamed at that time “the Gaggioli-Sama rules”. These guidelines, some of them previously published by Sama between 1980 and 1983, are a compilation of “second law errors” to avoid in the design of energy conversion systems. The list was rearranged several times, u...

Vehicular ad hoc networks (VANETs) are an emerging area of interest for the security community. Due to the scale of the network, the speed of the vehicles, their geographic positions, and the very sporadic connectivity between them, security issues of VANETs are very challenging, especially on how to ensure the authenticity of emergency messages efficiently. In this paper, we propose a secure a...

The purpose of this study was to clarify the additive efficacy of short-acting β(2)-agonists (SABA) or muscarinic antagonists (SAMA) on dynamic hyperinflation and exercise tolerance in patients with chronic obstructive pulmonary disease (COPD) who had been treated with long-acting bronchodilators. Thirty-two patients with stable COPD who had been treated with long-acting bronchodilators, includ...