Analysis of the effect of mobile terminal speed on WLAN/3G vertical handovers

Proceedings of IEEE Global Telecommunications Conference, GLOBECOM '06, San Francisco, California, 27 november - 1 december, 2006.WLAN hot-spots are becoming widely spread. This, combined with the availability of new multi-mode terminals integrating heterogeneous technologies, opens new business opportunities for mobile operators. Scenarios in which 3G coverage is complemented by WLAN deployments are becoming available. Thus, true all-IP based networks are ready to offer a new variety of services across heterogeneous access. However, to achieve this, some aspects still need to be analyzed. In particular, the effect of the terminal speed on the detection and selection process of the preferred access network is not yet well understood. In fact, efficiency of vertical handovers depends on the appropriate configuration of mobile devices. In this paper we present a simulation study of handover performance between 3G and WLAN access networks showing the impact of mobile users’ speed. The mobile devices are based on the IEEE 802.21 cross layer architecture and use WLAN signal level thresholds as handover criteria. A novel algorithm to dynamically adjust terminals’ configuration is presented.Publicad

Las necrópolis de Onuba

In this work a first global and updated approach on the funerary world of the roman city of Onuba Aestuaria –Huelva– is offered. We present the fi rst synthesis about the situation of different cemeterys in the city from the revision of the data provided by the archaeological interventions carried out mid the Sixties of the last century, between to the incorporation of the last new features related to modern research developed in the Archaeological Zone of Huelva.En el presente trabajo se ofrece un primer acercamiento conjunto y actualizado sobre el mundo funerario de la ciudad de Onuba Aestuaria, identifi cada con la actual capital onubense. Se hace una puesta al día sobre las investigaciones realizadas en este campo y se muestra la primera síntesis sobre la situación de las diferentes necrópolis de la ciudad a partir de la revisión de los datos proporcionados por las intervenciones arqueológicas realizadas desde mediados de los años sesenta de la pasada centuria, junto con la incorporación de las últimas novedades derivadas de la intensa actividad arqueológica que se realiza actualmente en la Zona Arqueológica de Huelva

Pragmatismo: o experimentalismo de John Dewey e o pragmatismo jurídico de Richard Posner como possíveis fontes de orientação para as decisões judiciais brasileiras

Num contexto em que o ordenamento jurídico apenas está completo com a apreciação das circunstâncias dos casos concretos apresentados à apreciação dos magistrados, e em que se debate intensamente a discricionariedade dos juízes na aplicação dos dispositivos legais, este trabalho pretende investigar a possibilidade de se verificar a adoção de raciocínio pragmático na tomada de decisões pelos Tribunais brasileiros. Para tanto, faz-se necessário esclarecer, em um primeiro momento, o que se entende por pragmatismo, no que serão apresentadas duas vertentes do pensamento pragmático: o experimentalismo de John Dewey e o pragmatismo jurídico de Richard Posner. Numa segunda etapa, depois de comparadas aquelas duas correntes, trata-se de investigar se alguma delas poderia nortear a formação do convencimento dos julgadores, a partir da análise de decisões aparentemente distantes do raciocínio jurídico tradicional. O resultado dessa investigação compõe a conclusão do trabalho

Desorganização macromolecular dos feixes de colageno sob a influencia da histamina : estudo experimental

Tese (livre-docência) - Universidade Estadual de Campinas, Faculdade de Odontologia de PiracicabaResumo: Não informadoAbstract: Not informedLivre DocênciaLivre-Docente em Odontologi

Changes In Liver Cell Dna Methylation Status In Diabetic Mice Affect Its Ft-ir Characteristics.

Lower levels of cytosine methylation have been found in the liver cell DNA from non-obese diabetic (NOD) mice under hyperglycemic conditions. Because the Fourier transform-infrared (FT-IR) profiles of dry DNA samples are differently affected by DNA base composition, single-stranded form and histone binding, it is expected that the methylation status in the DNA could also affect its FT-IR profile. The DNA FT-IR signatures obtained from the liver cell nuclei of hyperglycemic and normoglycemic NOD mice of the same age were compared. Dried DNA samples were examined in an IR microspectroscope equipped with an all-reflecting objective (ARO) and adequate software. Changes in DNA cytosine methylation levels induced by hyperglycemia in mouse liver cells produced changes in the respective DNA FT-IR profiles, revealing modifications to the vibrational intensities and frequencies of several chemical markers, including νas -CH3 stretching vibrations in the 5-methylcytosine methyl group. A smaller band area reflecting lower energy absorbed in the DNA was found in the hyperglycemic mice and assumed to be related to the lower levels of -CH3 groups. Other spectral differences were found at 1700-1500 cm(-1) and in the fingerprint region, and a slight change in the DNA conformation at the lower DNA methylation levels was suggested for the hyperglycemic mice. The changes that affect cytosine methylation levels certainly affect the DNA-protein interactions and, consequently, gene expression in liver cells from the hyperglycemic NOD mice.9e10229

Extracellular Matrix Of Ostrich Articular Cartilage.

The composition and organization of the extracellular matrix of ostrich articular cartilage was investigated, using samples from the proximal and distal surfaces of the tarsometatarsus. For morphological analysis, sections were stained with toluidine blue and analyzed by polarized light microscopy. For biochemical analysis, extracellular matrix components were extracted with 4 M guanidinium chloride, fractionated on DEAE-Sephacel and analyzed by SDS-PAGE. Glycosaminoglycans were analyzed by electrophoresis in agarose gels. Structural analysis showed that the fibrils were arranged in different directions, especially on the distal surface. The protein and glycosaminoglycan contents of this region were higher than in the other regions. SDS-PAGE showed the presence of proteins with molecular masses ranging from 17 to 121 kDa and polydisperse components of 67, 80-100, and 250-300 kDa in all regions. The analysis of glycosaminoglycans in agarose-propylene diamine gels revealed the presence of only chondroitin-sulfate. The electrophoretic band corresponding to putative decorin was a small proteoglycan containing chondroitin-sufate and not dermatan-sulfate, unlike other cartilages. The higher amounts of proteins and glycosaminoglycans and the multidirectional arrangement of fibrils seen in the distal region may be correlated with the higher compression normally exerted on this region.2947-5

Promoción y municipalización en el occidente bético

El proceso de romanización del extremo occidente bético, lo que ocupa hoy día el territorio onubense, ha vivido en los últimos años una revisión, y en la mayor parte de los aspectos, el inicio en la investigación del periodo romano. En esta línea, a continuación se presenta un estudio sobre la promoción jurídica de las ciudades del mismo sobre las que se precisaba realizar una síntesis diacrónica y comparativa en lo que a la obtención de su municipalización se refiere, desde el territorio de la sierra y el puerto de Onoba, donde se dejan sentir las medidas de Augusto, hasta las ciudades de la campiña deudoras de la extensión del ius latii vespasianeo.The process of romanization of the Western extreme of the Provincia Baetica, the current Huelva‘s territory, has lived in recent years a review, and in most respects, the beginning of the Roman period research. In this line, then, an analysis on the juridical promotion of the cities of this territory is presented, from the point of view of a diachronic and comparative synthesis in connection with their municipalization, from the territory of the mountains and the Onoba’s port, where the measures of Augustus are felt, to the cities of the countryside, in debt to the extent of the Vespasian’s ius latii