2,226 research outputs found
Introdução ao Roundtable Review do livro “Juca Paranhos: o Barão do Rio Branco”, de Luis Cláudio Villafañe Gomes Santos
No full textIntroduction to the Roundtable Review of the book “Juca Paranhos: The Baron of Rio Branco”, by Luis Cláudio Villafañe Gomes Santos (Villafañe, L.C. Juca Paranhos: o Barão do Rio Branco. São Paulo: Companhia das Letras, 2018, 560p.).Introdução ao Roundtable Review do Introdução ao Roundtable Review do livro “Juca Paranhos: o Barão do Rio Branco”, de Luis Cláudio Villafañe Gomes Santos (Villafañe, L.C. Juca Paranhos: o Barão do Rio Branco. São Paulo: Companhia das Letras, 2018, 560p.)
Structural Geology of the Cariboo Gold Mining District, East-Central British Columbia:
No full textL.C. Struik.Memoir (Geological Survey of Canada) ; 421
Maps of soil organic carbon stocks in Brazil
No full textThis database was created by Gustavo Vieira Veloso and Lucas Carvalho Gomes 04/06/2022.
Contact: [email protected] and [email protected]
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Maps of soil organic carbon (SOC) stocks in Brazil of the article: "Modeling and mapping soil organic carbon stocks in Brazil" (doi: 10.1016/j.geoderma.2019.01.007)
The dataset is composed of five folders of SOC stocks maps at the standard depths (0–5, 5–15, 15–30, 30–60, and 60–100 cm). The maps are in Geotif format (EPSG 102015) with a spatial resolution of approximately 1 km and include the mean SOC stocks, standard deviation (SD), coefficient of variation (CV), 0.05 and 0.95 quantiles.
The maps are free to use and please cite also the article:
Gomes, L.C., Faria, R.M., de Souza, E., Veloso, G.V., Schaefer, C.E.G., & Fernandes Filho, E.I. (2019). Modeling and mapping soil organic carbon stocks in Brazil. Geoderma, 340, 337-350
Depolarization and decreased surface expression of K+ channels contribute to NSAID-inhibition of intestinal restitution
No full textNon-steroidal anti-inflammatory drugs (NSAIDs) contribute to gastrointestinal ulcer formation by inhibiting epithelial cell migration and mucosal restitution; however, the drug-affected signaling pathways are poorly defined. We investigated whether NSAID inhibition of intestinal epithelial migration is associated with depletion of intracellular polyamines, depolarization of membrane potential (Em) and altered surface expression of K+ channels. Epithelial cell migration in response to the wounding of confluent IEC-6 and IEC-Cdx2 monolayers was reduced by indomethacin (100μM), phenylbutazone (100μM) and NS-398 (100μM) but not by SC-560 (1μM). NSAID-inhibition of intestinal cell migration was not associated with depletion of intracellular polyamines. Treatment of IEC-6 and IEC-Cdx2 cells with indomethacin, phenylbutazone and NS-398 induced significant depolarization of Em, whereas treatment with SC-560 had no effect on Em. The Em of IEC-Cdx2 cells was: −38.5±1.8mV under control conditions; −35.9±1.6mV after treatment with SC-560; −18.8±1.2mV after treatment with indomethacin; and −23.7±1.4mV after treatment with NS-398. Whereas SC-560 had no significant effects on the total cellular expression of Kv1.4 channel protein, indomethacin and NS-398 decreased not only the total cellular expression of Kv1.4, but also the cell surface expression of both Kv1.4 and Kv1.6 channel subunits in IEC-Cdx2. Both Kv1.4 and Kv1.6 channel proteins were immunoprecipitated by Kv1.4 antibody from IEC-Cdx2 lysates, indicating that these subunits co-assemble to form heteromeric Kv channels. These results suggest that NSAID inhibition of epithelial cell migration is independent of polyamine-depletion, and is associated with depolarization of Em and decreased surface expression of heteromeric Kv1 channels.ID: S0006295207001931; M3: Article; Accession Number: S0006295207001931; Author: L.C. Freeman (b); Author: D.F. Narvaez (a); Author: A. McCoy (a); Author: F.B. von Stein (c); Author: S. Young (b); Author: K. Silver (a); Author: S. Ganta (b); Author: D. Koch (b); Author: R. Hunter (b); Author: R.F. Gilmour (c); Author: J.D. Lillich (a, ⁎); Affiliation: Department of Clinical Sciences, Kansas State University, Manhattan, KS 66506, United States; Affiliation: Department of Anatomy and Physiology, Kansas State University, Manhattan, KS 66506, United States; Affiliation: Department of Biomedical Sciences, Cornell University, Ithaca, NY 14853, United States; Keyword: Non-steroidal anti-inflammatory drugs; Keyword: Intestinal epithelial cells; Keyword: Membrane potential; Keyword: Potassium channels; Number of Pages: 12; Language: English;Source type: Electronic(1)http://search.ebscohost.com/login.aspx?direct=true&db=edselp&AN=S0006295207001931&site=eds-live&scope=sit
A economia do carnaval: estudo sobre a "produção" da festa mais popular do Brasil com base na observação de uma experiência florianopolitana
No full textTCC (graduação) - Universidade Federal de Santa Catarina. Centro Sócio-Econômico. Economia.O presente trabalho analisa a cadeia produtiva da economia do carnaval com base em uma experiência florianopolitana, considerando o carnaval como um elemento da economia da cultura. A análise da cadeia produtiva do carnaval foi feita analisando a “fabricação” do carnaval da escola de samba Os Protegidos da Princesa, com inspiração nos estudos de Prestes Filho (2009), sobre a cadeia produtiva do carnaval das escolas de samba do Rio de Janeiro. A cadeia produtiva do carnaval apresenta etapas que constituem um ciclo de fabricação, cuja finalidade é o produto final. As etapas desse ciclo dizem respeito a: pré-produção, produção, distribuição, comercialização e consumo. Essas etapas convergem para o consumo, que é o desfile da escola de samba na avenida, que será acompanhado (consumido) por milhares de pessoas ao vivo e como telespectadores. Desse modo, apresenta-se o conceito de economia da cultura, mostrando como o carnaval pode ser considerado um integrante da realidade por ele captada. O carnaval é um espetáculo ao vivo, e este faz parte das atividades culturais produzidas pelas indústrias culturais, que compõem a economia da cultura. Fala-se da economia da cultura em escala mundial e, principalmente, no Brasil, onde o interesse por essa temática tardou a chegar, contrastando com outros países. Mostra-se a origem do carnaval e seus festejos pelo mundo, chegando ao Brasil e a Florianópolis, salientando a criação das escolas de samba como manifestações destacadas desses festejos, até os dias atuais. A partir daí, aborda-se a cadeia produtiva da economia do carnaval das escolas de samba do Rio de Janeiro, como base para um estudo sobre o mesmo tipo de cadeia relativamente à escola de samba Os Protegidos da Princesa. Conclui-se que a cadeia produtiva da economia do carnaval da escola de samba Os Protegidos da Princesa tem o mesmo perfil, praticamente, das referentes às escolas de samba do Rio de Janeiro, sendo os principais elos formados por pré-produção, produção, distribuição, comercialização e consumo. Porém, todas essas etapas do ciclo giram em torno do enredo escolhido pela escola de samba, pois é este que irá conduzir toda a “fabricação” do carnaval, chegando ao produto final, o desfile. Fala-se igualmente dos reflexos das atividades da escola de samba Os Protegidos da Princesa nas comunidades em que tal agremiação encontra-se instalad
Les Observations sur l'éloquence de l'abbé de Saint-Pierre
No full textAbbé de Saint-Pierre : Observations sur l'éloquence. Presented by Lawrence Kerslake.
Many of the abbé de Saint-Pierre's writings remain little-known or even unpublished. The Observations sur l'éloquence constitute his chief discussion of literature. A preliminary draft appeared in the Mercure in 1726, but the work subsequently underwent two major revisions, both states represented in Ms. R.248 of the Bibliothèque publique et universitaire in Neuchâtel. A further copy (BNF. N.a.fr. 11232), with a few additional changes, is published here. The ideas in the text show the author to be a 'Modern' in his position on beauty and literary effect, and reflect his life-long concern for the improvement of his fellow-citizens.Kerslake L.C. Les Observations sur l'éloquence de l'abbé de Saint-Pierre. In: Dix-huitième Siècle, n°31, 1999. Mouvement des sciences et esthétique(s) sous la direction de Christine Rolland, François Azouvi et Michel Baridon. pp. 305-328
Influence of the flooding regime on the nutritional state and juvenile recruitment of the curimba, Prochilodus scrofa, Steindachner, in upper Paraná River, Brazil
No full textGOMES, Luiz Carlos; AGOSTINHO, Angelo Antonio. Influence of the flooding regime on the nutritional state and juvenile recruitment of the curimba, Prochilodus scrofa, Steindachner, in upper Paraná River, Brazil. Fisheries Management and Ecology, Oxford, v.4, no.4, p.263-274, 1997.The relationship between the flooding pattern of the Paraná river floodplain and the nutritional state and juvenile growth of the curimba, Prochilodus scrofa Steindachner, over three years and its recruitment to the Itaipu reservoir fish stocks over six years were analysed. Seasonal and annual variation in the condition factor and visceral-somatic relationship were positively influenced by high water levels. A similar effect was found for growth during the second year of life. Recruitment success was found to be related to the occurrence of floods in summer and autumn. The importance of the annual floods to the availability of food, refuges and survival of P. scrofa are discussed in relation to the operation of the upstream dams
A 0.53pJK<sup>2</sup> 7000μm<sup>2</sup> resistor-based temperature sensor with an inaccuracy of ±0.35°C (3σ) in 65nm CMOS
No full textIn microprocessors and DRAMs, on-chip temperature sensors are essential components, ensuring reliability by monitoring thermal gradients and hot spots. Such sensors must be as small as possible, since multiple sensors are required for dense thermal monitoring. However, conventional BJT-based temperature sensors are not compatible with the sub-1V supply of advanced processes. Subthreshold MOSFETs can operate from lower supplies, but at high temperatures their performance is limited by leakage [1,2]. Thermal diffusivity (TD) sensors achieve sub-1V operation and small area with moderate accuracy, but require milliwatts of power [3]. Recently, resistor-based sensors based on RC WienBridge (WB) filters have realized high resolution and energy efficiency [4,5]. Fundamentally, they are robust to process and supply-voltage scaling. However, their readout circuitry has been based on continuous-time (CT) ΔΣ ADCs or frequency-locked loops (FLLs), which require precision analog circuits and occupy considerable area (>0.7mm 2 ).Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Microelectronic
A ±4A high-side current sensor with 25V input CM range and 0.9% gain error from -40°C to 85°C using an analog temperature compensation technique
No full textThis paper presents a fully integrated ±4A current sensor that supports a 25V input common-mode voltage range (CMVR) while operating from a single 1.5V supply. It consists of an on-chip metal shunt, a beyond-the-rails ADC [1] and a temperature-dependent voltage reference. The beyond-the-rails ADC facilitates high-side current sensing without the need for external resistive dividers or level shifters, thus reducing power consumption and system complexity. To compensate for the shunt's temperature dependence, the ADC employs a proportional-to-absolute-temperature (PTAT) reference voltage. Compared to digital temperature compensation schemes [2,3], this analog scheme eliminates the need for a temperature sensor, a band-gap voltage reference and calibration logic. As a result, the current sensor draws only 10.9μA and is 10x more energy efficient than [2]. Over a ±4A range, and after a one-point trim, the sensor exhibits a 0.9% (max) gain error from -40°C to 85°C and a 0.05% gain error at room temperature. The former is comparable with that of other fully-integrated current sensors [2-4], while the latter represents the state-of-the-art.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Electronic InstrumentationMicroelectronic
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