8,239 research outputs found
Análise sócio-espacial da localização de equipamentos públicos de abastecimento alimentar urbano: um estudo de caso em Florianópolis-SC
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Enhenharia Civil.O presente trabalho buscou efetivar análise da questão do abastecimento alimentar urbano e a apreensão nas suas múltiplas relações, através da análise espacial da localização de equipamentos públicos de abastecimento e os aspectos sociais e econômicos. A abordagem espacial priorizou o fator localização dos equipamentos e a territorialização de variáveis representantes de características sócio-econômicas de cada bairro, resultando numa proposta metodológica para aplicação de técnicas de geoprocessamento em estudos sociais Os equipamentos públicos de abastecimento alimentar urbano analisados, foram: Feira Livre, Feirões e Direto do Campo distribuídos espacialmente na área central insular da cidade de Florianópolis-SC. Como técnicas adotadas para a análise espacial, utilizou-se dos recuros disponíveis em geoprocessamento para a manipulação dos dados georeferenciados no software Microstatio
A concurrent B-link-tree algorithm using a cooperative locking protocol
No full textWe present a new concurrent B-link-tree algorithm that provides a concurrent tree restructuring mechanism for handling underflow nodes as well as overflow nodes. Our algorithm does not require any lock for downward searching and preserves bottom-up tree restructuring without deadlock. To this end, we develop a new locking mechanism for inserters and deleters and a node update rule that preserves the semantical tree consistency during tree restructuring. Our analytical experiment shows that the overhead of additional disk I/O is acceptable
Simultaneous Segmentation, Estimation and Analysis of Articulated Motion from Dense Point Cloud Sequence
No full textSC author and illustrator Kate Salley Palmer signing book
No full textPhotograph of SC author and illustrator Kate Salley Palmer signing boo
PRENATAL DIAGNOSIS OF ROBERT/SC SYNDROME IN A DIABETIC MOTHER WITH A HISTORY OF MEBENDAZOLE AND GLIBENCLAMIDE INTAKE
No full textThe Robert/SC (pseudothalidomide) syndrome is a rare autosomal recessive disorder, associated with phocomelia and craniofacial abnormalities. An anomalous fetus with lower limb phocomelia and micromelia, lumbar myeloschisis, upper limb and ribs defects and craniofacial abnormalities is reported whose diabetic mother took mebendazole and glibenclamide in early pregnancy. Ultrasonographic findings of syndromes with phocomelia are discussed as well as Robert/SC syndrome which is the most probable diagnosis. Robert/SC phocomelia syndrome is a rare autosomal recessive condition characterized by severe pre and postnatal growth deficiency, symmetric limb reductions of variable severity and craniofacial anomalies including hypertelorism, hypoplastic nasal alae, cleft lip and palate. About half of the reported cases presented chromosomal abnormalities. We think that findings in our case are consistent with Robert/SC syndrome with additional abnormalities
Book signing by SC author and illustrator Kate Salley Palmer
No full textPhotograph of Book signing by SC author and illustrator Kate Salley Palme
Frequency-domain transmit processing for MIMO SC-FDMA in wideband propagation channels
No full textRecently there has been considerable interest in the use of single carrier frequency division multiple access (SC-FDMA) as the uplink transmission scheme for the 3GPP long term evolution (LTE) standard. This paper investigates different multiple input multiple-output (MIMO) techniques for uplink SC-FDMA. Here we demonstrate how the transmitter can exploit the available channel information, through precoding and pre-equalization, in order to combat the frequency selective nature of the propagation channel and improve the system's performance under fading. In this work we investigate the achievable system capacity, and the peak-to-average power ratio (PAPR) characteristics of the precoded and pre-equalized SC-FDMA waveform. We consider unitary preceding for MIMO, as well as pre-equalization for a multiple-input single-output (MISO) system with maximum ratio combining (MRC), equal gain combining (EGC), zero forcing (ZF), and minimum mean square error (MMSE) algorithms. Results reported in this paper show that ZF pre-equalization for SISO SC-FDMA is capable of achieving the Shannon Capacity limit for faded channels, with a BER performance that is identical to an AWGN channel, and that pre-equalized increases the capacity of MIMO SC-FDMA systems.Recently there has been considerable interest in the use of single carrier frequency division multiple access (SC-FDMA) as the uplink transmission scheme for the 3GPP long term evolution (LTE) standard. This paper investigates different multiple input multiple-output (MIMO) techniques for uplink SC-FDMA. Here we demonstrate how the transmitter can exploit the available channel information, through precoding and pre-equalization, in order to combat the frequency selective nature of the propagation channel and improve the system's performance under fading. In this work we investigate the achievable system capacity, and the peak-to-average power ratio (PAPR) characteristics of the precoded and pre-equalized SC-FDMA waveform. We consider unitary preceding for MIMO, as well as pre-equalization for a multiple-input single-output (MISO) system with maximum ratio combining (MRC), equal gain combining (EGC), zero forcing (ZF), and minimum mean square error (MMSE) algorithms. Results reported in this paper show that ZF pre-equalization for SISO SC-FDMA is capable of achieving the Shannon Capacity limit for faded channels, with a BER performance that is identical to an AWGN channel, and that pre-equalized increases the capacity of MIMO SC-FDMA system
High-resolution clean-sc
No full textIn this paper a high-resolution extension of CLEAN-SC is proposed: HR-CLEAN-SC. Where CLEAN-SC uses peak sources in “dirty maps” to define so-called source components, HR-CLEAN-SC takes advantage of the fact that source components can likewise be derived from points at some distance from the peak, as long as these “source markers” are on the main lobe of the Point Spread Function (PSF). This is very useful when sources are closely spaced together, such that their PSFs interfere. Then, alternative markers can be sought in which the relative influence by PSFs of other source positions is minimised. For those markers the source components better agree with the actual sources, which allows for better estimation of their locations and strengths. This paper outlines the theory needed to understand this approach and discusses applications to 2D and 3D microphone array simulations with closely spaced sources
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