46,540 research outputs found
De Maiestate / Praeside M. Jacobo Thomasio, Moralis Philosoph. P. P., publice disputabit Johannes Dunte, R. L. Author & Respon: ad diem 9. Septembr. H L. Q. C.
No full textDE MAIESTATE / PRAESIDE M. JACOBO THOMASIO, MORALIS PHILOSOPH. P. P., PUBLICE DISPUTABIT JOHANNES DUNTE, R. L. AUTHOR & RESPON: AD DIEM 9. SEPTEMBR. H L. Q. C.
De Maiestate / Praeside M. Jacobo Thomasio, Moralis Philosoph. P. P., publice disputabit Johannes Dunte, R. L. Author & Respon: ad diem 9. Septembr. H L. Q. C. (1)
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Beiträge (21
FIGURE 5. Leucospis rileyi A. Hind femur and tibia. L. santarema B. Hind femur and tibia. L. metatibialis C. Hind leg. L. poeyi D. Hind femur and tibia. L. affinis affinis E. Hind femur and tibia. L. pictipyga F. Hind leg. L. latifrons G. Hind leg. L. hopei H in The New World species of Leucospis Fabricius, 1775 (Hymenoptera, Chalcidoidea, Leucospidae): an update of Bouček's revision with description of two new species from Brazil
No full textFIGURE 5. Leucospis rileyi A. Hind femur and tibia. L. santarema B. Hind femur and tibia. L. metatibialis C. Hind leg. L. poeyi D. Hind femur and tibia. L. affinis affinis E. Hind femur and tibia. L. pictipyga F. Hind leg. L. latifrons G. Hind leg. L. hopei H. Hind leg with white, black and red (dotted) colour indicated. L. pinna I. Propodeum, lateral view. L. manaica J. Hind leg. Figure I modified from Grissell and Cameron (2002, fig. 5); figures A–H, J modified from Bouček (1974a, figs 41, 43, 113, 60, 61, 54, 58, 45, 69).Published as part of Lima, Alessandro Rodrigues & Dias, Priscila Guimarães, 2018, The New World species of Leucospis Fabricius, 1775 (Hymenoptera, Chalcidoidea, Leucospidae): an update of Bouček's revision with description of two new species from Brazil, pp. 1-45 in Zootaxa 4441 (1) on page 12, DOI: 10.11646/zootaxa.4441.1.1, http://zenodo.org/record/129796
A marine systematic conservation plan for Rodrigues Island, Western Indian Ocean
No full textIncludes abstract.Includes bibliographical references (p. 53-59).In 2007 the local government of Rodrigues gazetted four marine reserves in the north of the island based on knowledge and insights from stakeholders, mainly from the fishing community. In order to verify the stakeholder-based design, a marine reserve network was designed using Marxan, a systematic conservation planning programme
Studies on Bis(imido) molybdenum complexes containing unsaturated hydrocarbon ligands
No full textThis thesis describes the synthesis and characterisation of molybdenum bis(imido) complexes containing unsaturated hydrocarbon ligands. A principal objective of the work was to examine the effect of various imido substituents on the coordination number of the complex and the orientations adopted by olefin and acetylene ligands. Chapter One highlights areas of transition metal chemistry relevant to the thesis, with particular emphasis on the psuedo-isolobal analogy between cyclopentadienyl and imido ligands, A convenient one-pot synthesis of molybdenum bis(imido) complexes of the type Mo(NR)(NR')Cl(_2).DME (R=R'=l-adamantyl, 2-t- BUC(_6)H(_4); R=2,6-i-Pr(_2)C(_6)H(_3), R'=t-Bu) is described in Chapter Two. Mo(N-l- adamantyl)(O)Cl(_2).DME has been synthesised, and its structure determined by single crystal X-ray diffraction.- The preparation of olefin complexes Mo(NR)(NR')(C(_2)H(_4))(PMe(_3))n (R=R'=l-adamantyl, n=l; R=R'=2-t-BuC(_6)H(_4), n=2; R=2,6-i-Pr(_2)C(_6)H(_3), R'=t- Bu, n=l) is outlined in Chapter Three. Structural information derived from NMR data has allowed comparison with metallocene-like olefin adducts. Chapter Four describes the synthesis of complexes containing σ-bound phenyl ligands (Mo(NR)(NR')(σ-C(_6)H(_5))(PMe(_3)) (R=R'=l-adamantyl, 2-t-BuC(_6)H(_4); R=2,6-i-Pr(_2)C(_6)H(_3), R'=t-Bu)) as potential precursors to benzyne complexes. Chapter Five describes the preparation of diphenylacetylene complexes Mo(NR)(NR')(PhC=CPh)(PMe(_3)), structural information derived from NMR data allows comparison with previously known metallocene-like acetylene complexes. Full experimental details for Chapters Two to Five are given in Chapter Six
Failure mechanisms and behaviour of adobe masonry buildings: A case study
No full textNon-linear static analyses are amongst engineering community one of the most common analysis approaches for the seismic assessment of existing buildings, due to a good trade-off between information needed and results produced to assess structural safety. Pushover analyses, in fact,
can provide hindsight onto structural behaviour well into the non-linear range, up unto conditions of collapse initiation and structural failure.
Reliable information concerning the material’s mechanical behaviour – especially in the nonlinear range - is, however, required – something which is challenging for earth-based materials, such as adobe masonry, due to the acknowledged variation of their mechanical properties.
In this paper, a non-linear constitutive law for adobe masonry, numerically calibrated using experimental results and defined within the widely used computer program SAP2000®, a Finite Element software package commonly used by practicing engineers for building design and structural verification, is proposed. A total strain crack-based macro-modelling approach was pursued, and mechanical properties were validated through numerical modelling and comparison with values available in literature.
The proposed constitutive model, whose reliability was proven by good agreement with experimental data, is then used to evaluate the expected seismic performance of a real case study given by an adobe building in central Portugal, representative of the city of Aveiro’s earthen heritage. Therefore, starting from this application, more hindsight over the structural behaviour of Portuguese adobe masonry buildings under failure conditions was provided, also showing the implemented model suitability for large scale structural analysis in the SAP2000® software.
Sensitivity analyses are run in Finite Element environment and the structural behaviour considering different boundary conditions of the building, namely isolated and aggregate conditions, is assessed through a multi-criteria approach accounting for displacement and acceleration capacity, drift levels and safety against in-plane and out-of-plane failures
Ultra-low-voltage inverter-based operational transconductance amplifiers with voltage gain enhancement by improved composite transistors
No full textThis paper proposes topological enhancements to increase voltage gain of ultra-low-voltage (ULV) inverter-based OTAs. The two proposed improvements rely on adoption of composite transistors and forward-body-biasing. The impact of the proposed techniques on performance figures is demonstrated through simulations of two OTAs. The first OTA achieves a 39 dB voltage gain, with a power consumption of 600 pW and an active area of 447 μm2. The latter allies the forward-body-bias approach with the benefit of the independently biased composite transistors. By combining both solutions, voltage gain is raised to 51 dB, consuming less power (500 pW) at the cost of an increased area of 727 μm2. The validation has been performed through post-layout simulations with the Cadence Analog Design Environment and the TSMC 180 nm design kit, with the supply voltage ranging from 0.3 V to 0.6 V
Self-biased and supply-voltage scalable inverter-based operational transconductance amplifier with improved composite transistors
No full textThis paper deals with a single-stage single-ended inverter-based Operational Transconduc-tance Amplifiers (OTA) with improved composite transistors for ultra-low-voltage supplies, while maintaining a small-area, high power-efficiency and low output signal distortion. The improved composite transistor is a combination of the conventional composite transistor and forward-body-biasing to further increase voltage gain. The impact of the proposed technique on performance is demonstrated through post-layout simulations referring to the TSMC 180 nm technology process. The proposed OTA achieves 54 dB differential voltage gain, 210 Hz gain–bandwidth product for a 10 pF capacitive load, with a power consumption of 273 pW with a 0.3 V power supply, and occupies an area of 1026 μm2. For a 0.6 V voltage supply, the proposed OTA improves its voltage gain to 73 dB, and achieves a 15 kHz gain–bandwidth product with a power consumption of 41 nW
Interaction of warm acclimation, low salinity, and trophic fluoride on plasmatic constituents of the Antarctic fish Notothenia rossii Richardson, 1844
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Previous issue date: 2013Ministério da Ciência, Tecnologia e Inovação (MCTI)Secretariat of the Inter-ministerial Commission for the Resources of the Sea (SeCIRM)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)Instituto Nacional de Ciência e Tecnologia Antártico de Pesquisas Ambientais (INCT-APA)The adaptive evolution of the Notothenia rossii occurred under the selective pressure of stable and low temperatures. It is an opportunistic feeder of Antarctic krill and the fluoride in the krill carapace is apparently not toxic. We investigated the interactive effect of fluoride, elevated temperatures, and low salinity on the plasmatic constituents of this Antarctic fish. The experiments were conducted at the Brazilian Antarctic Station Comandante Ferraz (EACF), located on King George Island. The Antarctic fish N. rossii was acclimatized to eight thermo-saline-trophic conditions, combining two temperatures (0 and 4 A degrees C), two salinities (35 and 20), and two trophic conditions (with/without fluoride) for an 11-day period. Trophic fluoride was not able to alter the plasmatic levels of glucose, cholesterol, plasmatic protein, Cl-, Mg2+, Ca2+, and inorganic phosphate, but induced an acute elevation of triglycerides at 0 A degrees C and salinity of 35. At low salinity, hyperglycemia, hypertriglyceridemia, and hypocalcemia were observed. The thermo-saline interaction at 4 A degrees C was able to minimize the effects of fluoride and low salinity on the plasmatic constituents levels.[Rodrigues, E., Jr.; Feijo-Oliveira, M.; Donatti, L.] Univ Fed Parana, Dept Cell Biol, BR-81530130 Curitiba, Parana, Brazil[Vani, G. S.; Suda, C. N. K.; Rodrigues, E.] Universidade de Taubaté (Unitau), Inst Basic Biosci, BR-12030180 Taubate, SP, Brazil[Carvalho, C. S.] Univ Fed Sao Carlos, Dept Biol, BR-18052780 Sorocaba, SP, Brazil[Lavrado, H. P.] Univ Fed Rio de Janeiro, Dept Marine Biol, BR-21941902 Rio De Janeiro, RJ, Brazi
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