Optimal packetisation of MPEG-4 using RTP over mobile networks

The introduction of third-generation wireless networks should result in real-time mobile video communications becoming a reality. Delivery of such video is likely to be facilitated by the realtime transport protocol (RTP). Careful packetisation of the video data is necessary to ensure the optimal trade-off between channel utilisation and error robustness. Theoretical analyses for two basic schemes of MPEG-4 data encapsulation within RTP packets are presented. Simulations over a GPRS (general packet radio service) network are used to validate the analysis of the most efficient scheme. Finally, a motion adaptive system for deriving MPEG-4 video packet sizes is presented. Further simulations demonstrate the benefits of the adaptive system

Search for new phenomena in final states with an energetic jet and large missing transverse momentum in pp collisions at √ s = 8 TeV with the ATLAS detector

Results of a search for new phenomena in final states with an energetic jet and large missing transverse momentum are reported. The search uses 20.3 fb−1 of √ s = 8 TeV data collected in 2012 with the ATLAS detector at the LHC. Events are required to have at least one jet with pT > 120 GeV and no leptons. Nine signal regions are considered with increasing missing transverse momentum requirements between Emiss T > 150 GeV and Emiss T > 700 GeV. Good agreement is observed between the number of events in data and Standard Model expectations. The results are translated into exclusion limits on models with either large extra spatial dimensions, pair production of weakly interacting dark matter candidates, or production of very light gravitinos in a gauge-mediated supersymmetric model. In addition, limits on the production of an invisibly decaying Higgs-like boson leading to similar topologies in the final state are presente

Improving biomass production and saccharification in Brachypodium distachyon through overexpression of a sucrose-phosphate synthase from sugarcane

The substitution of fossil by renewable energy sources is a major strategy in reducing CO2 emission and mitigating climate change. In the transport sector, which is still mainly dependent on liquid fuels, the production of second generation ethanol from lignocellulosic feedstock is a promising strategy to substitute fossil fuels. The main prerequisites on designated crops for increased biomass production are high biomass yield and optimized saccharification for subsequent use in fermentation processes. We tried to address these traits by the overexpression of a sucrose-phosphate synthase gene (SoSPS) from sugarcane (Saccharum officinarum) in the model grass Brachypodium distachyon. The resulting transgenic B. distachyon lines not only revealed increased plant height at early growth stages but also higher biomass yield from fully senesced plants, which was increased up to 52 % compared to wild-type. Additionally, we determined higher sucrose content in senesced leaf biomass from the transgenic lines, which correlated with improved biomass saccharification after conventional thermo-chemical pretreatment and enzymatic hydrolysis. Combining increased biomass production and saccharification efficiency in the generated B. distachyon SoSPS overexpression lines, we obtained a maximum of 74 % increase in glucose release per plant compared to wild-type. Therefore, we consider SoSPS overexpression as a promising approach in molecular breeding of energy crops for optimizing yields of biomass and its utilization in second generation biofuel production

Essential versus accessory aspects of cell death: recommendations of the NCCD 2015

Cells exposed to extreme physicochemical or mechanical stimuli die in an uncontrollable manner, as a result of their immediate structural breakdown. Such an unavoidable variant of cellular demise is generally referred to as ‘accidental cell death’ (ACD). In most settings, however, cell death is initiated by a genetically encoded apparatus, correlating with the fact that its course can be altered by pharmacologic or genetic interventions. ‘Regulated cell death’ (RCD) can occur as part of physiologic programs or can be activated once adaptive responses to perturbations of the extracellular or intracellular microenvironment fail. The biochemical phenomena that accompany RCD may be harnessed to classify it into a few subtypes, which often (but not always) exhibit stereotyped morphologic features. Nonetheless, efficiently inhibiting the processes that are commonly thought to cause RCD, such as the activation of executioner caspases in the course of apoptosis, does not exert true cytoprotective effects in the mammalian system, but simply alters the kinetics of cellular demise as it shifts its morphologic and biochemical correlates. Conversely, bona fide cytoprotection can be achieved by inhibiting the transduction of lethal signals in the early phases of the process, when adaptive responses are still operational. Thus, the mechanisms that truly execute RCD may be less understood, less inhibitable and perhaps more homogeneous than previously thought. Here, the Nomenclature Committee on Cell Death formulates a set of recommendations to help scientists and researchers to discriminate between essential and accessory aspects of cell death

Performance of CMS muon reconstruction in pp collision events at sqrt(s) = 7 TeV

The performance of muon reconstruction, identification, and triggering in CMS has been studied using 40 inverse picobarns of data collected in pp collisions at sqrt(s) = 7 TeV at the LHC in 2010. A few benchmark sets of selection criteria covering a wide range of physics analysis needs have been examined. For all considered selections, the efficiency to reconstruct and identify a muon with a transverse momentum pT larger than a few GeV is above 95% over the whole region of pseudorapidity covered by the CMS muon system, abs(eta) < 2.4, while the probability to misidentify a hadron as a muon is well below 1%. The efficiency to trigger on single muons with pT above a few GeV is higher than 90% over the full eta range, and typically substantially better. The overall momentum scale is measured to a precision of 0.2% with muons from Z decays. The transverse momentum resolution varies from 1% to 6% depending on pseudorapidity for muons with pT below 100 GeV and, using cosmic rays, it is shown to be better than 10% in the central region up to pT = 1 TeV. Observed distributions of all quantities are well reproduced by the Monte Carlo simulation.Comment: Replaced with published version. Added journal reference and DO

IMPLANTAÇÃO DA GESTÃO POR PROCESSOS DESCRIÇÃO DE CASO NA SIM EDITORA

A gestão de processos de negócio visa contribuir na organização e execução dos trabalhos de qualquer empresa, melhorando sua performance na entrega para o cliente. Desta forma, este artigo tem o objetivo de apresentar um método de gestão de processos para novos projetos na empresa SIM Editora. Para tanto, o presente estudo adota a abordagem qualitativa e o método de pesquisa dedutivo e, para a conceituação da prática de gestão por processos e elaboração dos processos organizacionais, foram utilizados como métodos científicos a pesquisa bibliográfica e o estudo de caso prático. Assim, através deste trabalho, foi possível identificar gargalos e sugerir melhorias para a empresa SIM Editora, entre elas, a organização das ações, o tempo para desempenhá-las e a otimização do trabalho dos envolvidos. Sugestões simples, mas que proporcionaram resultados positivos para melhor a eficiência e a efetividade da editora em trabalho, tempo, conteúdo e conceituação

Performance of CMS muon reconstruction in pp collision events at sqrt(s) = 7 TeV

The performance of muon reconstruction, identification, and triggering in CMS has been studied using 40 inverse picobarns of data collected in pp collisions at sqrt(s) = 7 TeV at the LHC in 2010. A few benchmark sets of selection criteria covering a wide range of physics analysis needs have been examined. For all considered selections, the efficiency to reconstruct and identify a muon with a transverse momentum pT larger than a few GeV is above 95% over the whole region of pseudorapidity covered by the CMS muon system, abs(eta) < 2.4, while the probability to misidentify a hadron as a muon is well below 1%. The efficiency to trigger on single muons with pT above a few GeV is higher than 90% over the full eta range, and typically substantially better. The overall momentum scale is measured to a precision of 0.2% with muons from Z decays. The transverse momentum resolution varies from 1% to 6% depending on pseudorapidity for muons with pT below 100 GeV and, using cosmic rays, it is shown to be better than 10% in the central region up to pT = 1 TeV. Observed distributions of all quantities are well reproduced by the Monte Carlo simulation.Comment: Replaced with published version. Added journal reference and DO

Glycan-dependent binding of galectin-1 to neuropilin-1 promotes axonal regeneration after spinal cord injury

Following spinal cord injury (SCI), semaphorin 3A (Sema3A) prevents axonal regeneration through binding to the neuropilin-1 (NRP-1)/PlexinA4 receptor complex. Here, we show that galectin-1 (Gal-1), an endogenous glycan-binding protein, selectively bound to the NRP-1/PlexinA4 receptor complex in injured neurons through a glycan-dependent mechanism, interrupts the Sema3A pathway and contributes to axonal regeneration and locomotor recovery after SCI. Although both Gal-1 and its monomeric variant contribute to de-activation of microglia, only high concentrations of wild-type Gal-1 (which co-exists in a monomer-dimer equilibrium) bind to the NRP-1/PlexinA4 receptor complex and promote axonal regeneration. Our results show that Gal-1, mainly in its dimeric form, promotes functional recovery of spinal lesions by interfering with inhibitory signals triggered by Sema3A binding to NRP-1/PlexinA4 complex, supporting the use of this lectin for the treatment of SCI patients.Fil: Quintá, Héctor Ramiro. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Química y Fisicoquímica Biológicas; ArgentinaFil: Pasquini, Juana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Química y Fisicoquímica Biológicas; ArgentinaFil: Rabinovich, Gabriel Adrian. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología y Medicina Experimental (i); Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; ArgentinaFil: Pasquini, Laura Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Química y Fisicoquímica Biológicas; Argentin

PLANEJAMENTO ESTRATÉGICO NO SETOR DE COMPRAS DO SUPERMERCADO DA CASA LTDA. ME

O principal objetivo deste artigo foi investigar a existência de métodos de planejamento estratégico no setor de compras do Supermercado da Casa Ltda. Me, que para seu cumprimento far-se-á o diagnóstico dos métodos de planejamento existente na empresa bem como a análise através do sistema de informação para necessidade de compra para os diferentes meses do ano e por fim propor a implantação de novas estratégias de planejamento no setor de compras. Os métodos utilizados para elaboração deste estudo são de natureza aplicada por se tratar de uma empresa verídica, que será complementada com teor bibliográfico, já que suas informações serão tiradas de livros e artigos científicos, além de apresentar caráter exploratório. Quanto à abordagem da pesquisa será de forma qualitativa. O seu método trata-se de um estudo de caso, no qual terá como técnica de investigação de informações através da pesquisa de observação  nos diferentes setores do estabelecimento divididos em açougue, embutidos e hortifrúti, panificadora, higiene pessoal, limpeza e os alimentos não perecíveis. Conclui-se deste modo que com a implantação do setor, adesão das estratégias propostas e administração do setor de compras com maior cautela, será atingido o equilíbrio almejado existente entre a oferta e a demanda que a empresa possui, que por sua vez ira sanar os problemas existentes relacionados ao setor de compras e estoques do supermercado

PLANEJAMENTO ESTRATÉGICO COMO FERRAMENTA DE GESTÃO NAS PEQUENAS EMPRESAS

No universo das pequenas empresas, o planejamento estratégico é usado para garantir um processo de interação com o ambiente, que permite o estabelecimento e a busca de objetivos além de desenvolver potencialidades e orientar para um melhor aproveitamento dos recursos até então desconhecidos por essas empresas, que apresentam deficiências de gestão, tornando-se vulneráveis ao mercado em constante mudança. Assim, é necessário abordar o planejamento estratégico de forma menos complexa, adequando as características de gestão das pequenas empresas. O objetivo dessa pesquisa foi desenvolver o planejamento estratégico como ferramenta de gestão, trazendo diferencial e eficácia para as pequenas empresas. A partir de uma revisão bibliográfica e da coleta de dados por meio de questionário e análise documental foi adaptado à pequena empresa um roteiro simplificado de implantação do planejamento estratégico como uma ferramenta de gestão. A pesquisa atentou-se para a importância da pequena empresa num contexto econômico e social, e a falta de processos administrativos específicos que as ajudem a competir e conquistar mercados. Concluiu-se que com a implantação e acompanhamento, o planejamento estratégico realmente pode ser uma ferramenta de gestão que traga estabilidade, eficiência e eficácia a pequena empresa