11 research outputs found
Experimental evaluation of wireless mesh network with the Intel classmate pcs
This paper shows performance evaluation results of a wireless mesh network employing an 802.11s standard and low cost Intel Classmate PCs. The experiments consist of throughput and coverage range determination, in indoor and outdoor scenarios, in which net and communication multihop coverage tests were done. The results show maximum throughput of 14 Mbps for TCP and 12 Mbps for UDP respectively, proving the proposed solution's viability for the digital inclusion process in public schools.Este artigo apresenta os resultados da avaliação de uma rede mesh empregando o padrão 802.11s e laptops de baixo custo para inclusão digital fabricados pela Intel - os Classmate PCs. Os experimentos de avaliação contemplaram tanto testes em ambientes internos como externos, nos quais foram realizados testes de cobertura da rede e comunicação multihop. Os experimentos realizados mostram uma taxa máxima obtida na transferência de pacotes de 14Mbps e 12Mbps para TCP e UDP, respectivamente, comprovando a viabilidade da solução proposta para o processo de inclusão digital nas escolas públicas
Spermine oxidase (SMO) activity in breast tumor tissues and biochemical analysis of the anticancer spermine analogues BENSpm and CPENSpm
Background: Polyamine metabolism has a critical role in cell death and proliferation representing a potential
target for intervention in breast cancer (BC). This study investigates the expression of spermine oxidase (SMO) and
its prognostic significance in BC. Biochemical analysis of Spm analogues BENSpm and CPENSpm, utilized in
anticancer therapy, was also carried out to test their property in silico and in vitro on the recombinant SMO
enzyme.
Methods: BC tissue samples were analyzed for SMO transcript level and SMO activity. Student’s t test was applied
to evaluate the significance of the differences in value observed in T and NT samples. The structure modeling
analysis of BENSpm and CPENSpm complexes formed with the SMO enzyme and their inhibitory activity, assayed
by in vitro experiments, were examined.
Results: Both the expression level of SMO mRNA and SMO enzyme activity were significantly lower in BC samples
compared to NT samples. The modeling of BENSpm and CPENSpm complexes formed with SMO and their
inhibition properties showed that both were good inhibitors.
Conclusions: This study shows that underexpression of SMO is a negative marker in BC. The SMO induction is a
remarkable chemotherapeutical target. The BENSpm and CPENSpm are efficient SMO inhibitors. The inhibition
properties shown by these analogues could explain their poor positive outcomes in Phases I and II of clinical trials
Molecular analysis of methicillin-resistant Staphylococcus aureus dissemination among healthcare professionals and/or HIV patients from a tertiary hospital
Avaliaçao expeimental de redes Mesh com os classmate PCS da intel
This paper shows performance evaluation results of a wireless mesh network employing an 802.11s standard and low cost Intel Classmate PCs. The experiments consist of throughput and coverage range determination, in indoor and outdoor scenarios, in which net and communication multihop coverage tests were done. The results show maximum throughput of 14 Mbps for TCP and 12 Mbps for UDP respectively, proving the proposed solution�s viability for the digital inclusion process in public schools.Este artigo apresenta os resultados da avaliação de uma rede mesh empregando o padrão 802.11s e laptops de baixo custo para inclusão digital fabricados pela Intel - os Classmate PCs. Os experimentos de avaliação contemplaram tanto testes em ambientes internos como externos, nos quais foram realizados testes de cobertura da rede e comunicação multihop. Os experimentos realizados mostram uma taxa máxima obtida na transferência de pacotes de 14Mbps e 12Mbps para TCP e UDP, respectivamente, comprovando a viabilidade da solução proposta para o processo de inclusão digital nas escolas públicas
A CMOS UWB transmitter with Vivaldi Array for Ultra-fast Beam steering microwave radar
This work presents a new Ultra Wide Band (UWB) beamforming fifth-order derivative Gaussian pulse transmitter with dual small Vivaldi antennas for remote acquisition of vital signals in impulse radar applications. The system consists of a programmable delay circuit (PDC or τ), a UWB pulse generator (PG) circuit and an array of two Vivaldi planar antennas. The circuits is designed using the 0.18µm CMOS IBM process. Spice simulations show the pulse generation with 90mVpp amplitude and 300ps width. The average power consumption is 120µW per pulse, using a 2V power supply at a pulse repetition rate (PRR) of 100MHz. Full tridimensional electromagnetic simulations, using CST MWS, show the main lobe radiation with a gain of 5.5dB, and a beam steering between 20º and -17.5º for azimuthal (θ) angles at the center frequency of 7.5GHz