The Group Allocation Multiple Access with Packet-Sensing (GAMA-PS) protocol for scheduling real-time and datagram traffic in a wireless LAN is specified and analyzed. By maintaining a dynamically-sized cycle that changes in length depending on the amount of network traffic, GAMA-PS is able to efficiently control channel access while ensuring that there are no collisions of data packets. Each cy...

L-Carnitine is used extensively in functional foods and food supplements; consequently, the control of its enantiomeric purity is of paramount importance. A new derivatization procedure and chiral gas chromatographic method with flame ionization detection, using a cyclodextrin based stationary phase, enables prompt, simple, and inexpensive screening of the enantiomeric ratio of L- and D-carniti...

This paper considers Gama-Nguyen-Regev’s strategy [4] for optimizing pruning coefficients for lattice vector enumeration. We give a table of optimized coefficients and proposes a faster method for computing near-optimized coefficients for any parameters by interpolation.

γ-Glutamyl transpeptidase (5-L-glutamyl-peptide: amino acid 5-glutamyl transferase; EC 2.3.2.2; abbreviated GGT), is a plasma membrane-associated enzyme that is located on the outer surface of the cells of secretory tissues [1]. It plays a central role in the metabolism of glutathione that is widely in various mammals [2]. The enzyme catalyzes the degradation of the extracellular glutathione in...

The key role of emotions in decision-making process of human beings has been highlighted recently. Our research focuses on fear-related emotions and their positive impact on the survival capabilities of human beings in case of crisis situations. In this paper, we proposed a new model of emotional contagion based on some main findings in social psychology. This model was formalized mathematicall...

* Study carried out at and sponsored by Gama Filho University. Jointly sponsored by FAPERJ E-26/170.647/2001. Correspondence to: Anete Trajman. Departamento de Medicina. Universidade Gama Filho. Rua Manoel Vitorino 553, Piedade, CEP 20748-900 – Rio de Janeiro, RJ. Submitted: 4 March 2004. Accepted, after review: 5 September 2004. Background: The diagnosis of pleural tuberculosis continues to be...

Journal of the American Chemical Society is published by the American Chemical Society. 1155 Sixteenth Street N.W., Washington, DC 20036 Communication Neuroactive Chondroitin Sulfate Glycomimetics Manish Rawat, Cristal I. Gama, John B. Matson, and Linda C. Hsieh-Wilson J. Am. Chem. Soc., 2008, 130 (10), 2959-2961• DOI: 10.1021/ja709993p • Publication Date (Web): 15 February 2008 Downloaded from...

1 Departamento de Análise Matemática, Facultade de Matemáticas, Campus Sur, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain 2 Departamento de Matemáticas, Universidad de Jaén, Ed. B3, Las Lagunillas, 23009 Jaén, Spain 3 Faculdade de Ciências da Universidade de Lisboa, Centro de Matemática e Aplicações Fundamentais, Avenida Professor Gama Pinto 2, 1649-003 Lisboa, Por...