Nota Técnica No 06/PES/2023

A Presente Nota Técnica trata sobre a realização de dragagens e aterros em praias arenosas, da análise dos licenciamentos feitos pelo Instituto do Meio Ambiente de Santa Catarina e da proposição de mudança na Resolução CONSEMA 98/2017, que define o porte desses empreendimentos, que por sua vez estabelece a potencial significância dos impactos que esses empreendimentos podem gerar e o tipo de estudo ambiental que deve ser realizado para a avaliação de impactos e obtenção do licenciamento da obra

Drought-induced biomass burning as a source of black carbon to the central Himalaya since 1781 CE as reconstructed from the Dasuopu ice core

Himalayan glaciers are melting due to atmospheric warming, with the potential to limit access to water for more than 25 % of the global population that resides in these glacier meltwater catchments. Black carbon has been implicated as a factor that is contributing to Himalayan glacier melt, but its sources and mechanisms of delivery to the Himalayas remain controversial. Here, we provide a 211-year ice core record spanning 1781–1992 CE for refractory black carbon (rBC) deposition from the Dasuopu glacier ice core that has to date provided the highest-elevation ice core record (7200 m). We report an average rBC concentration of 1.5 µg L−1 (SD=5.0, n=1628) over the 211-year period. An increase in the frequency and magnitude of rBC deposition occurs after 1877 CE, accompanied by decreased snow accumulation associated with a shift in the North Atlantic Oscillation Index to a positive phase. Typically, rBC is deposited onto Dasuopu glacier during the non-monsoon season, and short-lived increases in rBC concentration are associated with periods of drought within neighboring regions in northwestern India, Afghanistan, and Pakistan. Using a combination of spectral and back-trajectory analyses, as well as a comparison with a concurrent analysis of trace metals at equivalent depths in the same ice core, we show that biomass burning resulting from dry conditions is a source of rBC to the central Himalaya and is responsible for deposition that is up to 60 times higher than the average rBC concentration over the time period analyzed. We suggest that biomass burning is a significant source of rBC to the central Himalaya and that the rBC record can be used to identify periods of drought in nearby regions that are upwind of Dasuopu glacier

Side-lobe level reduction in bio-inspired optical phased-array antennas

COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPESFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESPCONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQPhased arrays are expected to play a critical role in visible and infrared wireless systems. Their improved performance compared to single element antennas finds uses in communications, imaging, and sensing. However, fabrication of photonic antennas and their feeding network require long element separation, leading to the appearance of secondary radiation lobes and, consequently, crosstalk and interference. In this work, we experimentally show that by arranging the elements according to the Fermat's spiral, the side lobe level (SLL) can be reduced. This reduction is proved in a CMOS-compatible 8-element array, revealing a SLL decrement of 0.9 dB. Arrays with larger numbers of elements and inter-element spacing are demonstrated through a spatial light modulator (SLM) and an SLL drop of 6.9 dB is measured for a 64-element array. The reduced SLL, consequently, makes the proposed approach a promising candidate for applications in which antenna gain, power loss, or information security are key requirements.25243010530114COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPESFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESPCONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQCOORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPESFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESPCONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQSem informação08/57857-22013/20180-32015/04113-0574017/2008-9446746/2014-

DIGITALIZAÇÃO DO ACERVO DO ARQUIVO HISTÓRICO DO MUNICÍPIO DE ARARANGUÁ

Em novembro de 2011 a Universidade Federal de Santa Catarina campus Araranguá em uma parceria com o Centro Cultural da cidade, por meio da Bolsa de Cultura da universidade, iniciou o processo de digitalização do acervo do arquivo histórico da cidade. Seu acervo já se encontrava parcialmente organizado, com um grande número de jornais, documentos em geral e imagens. Com o objetivo de digitalizar o acervo em partes, analisamos a maior demanda de procura da população em relação a todo esse acervo, e assim percebemos a grande procura principalmente pelo acervo de imagens. Então, iniciamos o processo de digitalização pelas fotografias, que totaliza 3.647 imagens. Estas foram identificadas e receberam uma legenda, e então separadas e guardadas digital e fisicamente pelo tema que representam. Em um segundo momento, dando sequencia ao projeto, no primeiro semestre de 2013 iniciou-se a digitalização dos documentos como certidões, correspondência e registros do município de Araranguá e arredores, estes até o momento, contabilizam mais de 5.000 documentos que se encontram em processo de digitalização e organização

A major glacial-interglacial change in aeolian dust composition inferred from Rare Earth Elements in Antarctic ice

We present the first Rare Earth Elements (REE) concentration record determined in 294 sections of an Antarctic ice core (EPICA Dome C), covering a period from 2.9 to 33.7 kyr BP. REE allow a detailed quantitative evaluation of aeolian dust composition because of the large number of variables (i.e. 14 elements). REE concentrations match the particulate dust concentration profile over this period and show a homogeneous crustal-like composition during the last glacial stage (LGS), with only a slight enrichment in medium REE. This signature is consistent with the persistent fallout of a mixture of dust from heterogeneous sources located in different areas or within the same region (e.g. South America). Starting at ∼15 kyr BP, there was a major change in dust composition, the variable character of which persisted throughout the Holocene. This varying signature may highlight the alternation of single dust contributions from different sources during the Holocene. We observe that the frequent changes in REE composition at the onset of the Holocene (10-13.5 kyr BP) are linked to dust size and in turn to wind strength and/or the path of the atmospheric trajectory. This may indicate that atmospheric circulation dictated the composition of the dust fallout to East Antarctica at that time. Although the dust concentrations remained fairly low, a notable return towards more glacial dust characteristics is recorded between 7.5 and 8.3 kyr BP. This happened concomitantly with a widespread cold event around 8 kyr BP that was 400-600 years long and suggests a moderate reactivation of the dust emission from the same potential source areas of the LGS

Dinâmica metropolitana e estrutura social em Salvador

This article discusses how the dynamics of globalization and its aftermath have affected the social economic configuration of Brazilian metropolitan areas, with particular emphasis on the case of Salvador. Following a brief survey of the relevant literature on the subject, the paper links the spatial and urban reconfiguration of the Brazilian metropolitan areas with the historical heritage of the urbanization process, the differentiation of the urban and metropolitan network and the spatial and social effects of recent national policies toward a greater integration with the new international order. The paper compares the recent trends of the socio-economic changes in Salvador with those of other Brazilian metropolises, and concludes that they are not significantly different in spite of a stronger adverse social impact due to local social conditions.Este artigo discute como a dinâmica da globalização e mudanças a ela associadas vêm afetando a conformação socioeconômica das metrópoles brasileiras, analisando, especificamente, o caso de Salvador. Após uma referência inicial à literatura sobre os processos em discussão, o texto assinala como a análise das reconfigurações espaciais e urbanas, no Brasil, não pode deixar de lado a herança histórica do processo de urbanização, a diferenciação da rede urbana e metropolitana e os efeitos espaciais e sociais das políticas recentes de inserção do país na nova ordem mundial. Analisa, a seguir, a trajetória e as transformações socioeconômicas recentes de Salvador, constatando como as mesmas são bastante similares às verificadas em outras metrópoles brasileiras, com efeitos adversos ampliados pelas condições e especificidades locais