Design optimization of high-performance electrodynamic actuators for use in a cryogenically cooled telescope

An analysis and optimization of a mirror-actuator system for large excursion/high-frequency chopping is developed. The results of this analysis, combined with laboratory measurements of a prototype actuator operating at cryogenic temperatures, allow performance predictions to be made for a real system utilizing this technology

Procedimentos e aspectos necessários para a análise da relação força/EMG do músculo quadríceps femoral avaliado em condição isométrica e dinâmica

The electromyography (EMG) has been used as a resource related to clinical interventions, as well as control of the adjustments resulting from physical training, especially the muscular strength. The muscular electrical activity allows the investigation of which muscles are used in a motion, the level of muscle activation during the course of movement, intensity and duration of muscular demand. Due to the great usefulness of the study of muscle electrical signal and its complex relationship with the force production, both the relation to physiological and non physiological aspects as well as the procedures needed for the collection of EMG signal in isometric and dynamic activity took place this review. Therefore, the EMG signal presents relation with the strength production of the knee extensor muscles. This relationship has been better demonstrated in isometric assessments than in dynamic conditions, what stimulates further scientific production in this area to better understand and explain the relationship of the contraction dynamics, the production of force and changes in EMG signal and improve their applicability not only in the scientific scope, but in clinical tool, since the dynamic activities are similar to the sports gestures and activities of daily living

Assessment of seismic performance of adobe structures in Pakistan and Portugal

Adobe buildings exist in different parts of the world. The construction of these buildings can be carried out economically, using locally available materials and skills that do not require use of modern machinery. Therefore, adobe buildings provide an economic housing option. The construction of adobe structures is carried out based on traditional construction practices which vary from region to region. This paper presents the results of a study which was conducted to study the construction practices of adobe buildings in Pakistan and Portugal in the context of their seismic vulnerability. The adobe buildings in both these countries were found to be subjected to seismic hazard levels which, although is low in some regions, may cause significant damages. Lack of essential elements or details for the adequate seismic performance was found in the adobe buildings in both regions

David Bowie, brinquedos adultos e outras dimensões estranhas do universo de Twin Peaks

The article is based fundamentally on the authors' participation in the International Conference “I’ll See You Again in 25 Years: The return of Twin Peaks and generations of cult TV”, held on 21 and 22 May 2015, at the School of Arts and Media, at the University of Salford in England. Starting from there, it makes an irregular discussion of issues and working angles around the television series launched in 1990, a work by David Lynch and Mark Frost. Some issues gain particular attention: 1) the relations of the series to the album Outside (1995) by David Bowie; 2) the population of adult toys related to the series, as derivative products, driven by fans in their most playful exercises of affection and remembrance. Despite the article’s intentionally adopted tone of an “academic report”, it can evoke rich theoretical questions in a field of objects that are in a complex upgrade process and have to be subsequently treated according to more regular methodological procedures, seeking further theoretical and epistemological clarifications

Dielectric Resonator Nanoantenna Coupled To Metallic Coplanar Waveguide

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)A proposal about a dielectric resonator nanoantenna applied to couple optical beams to a surface plasmon coplanar waveguide (SP CPW), and vice versa, was theoretically investigated. The effects of this device operating in optical frequencies were studied, taking into account the central frequency of the conventional optical communication spectrum (C-band). Numerical results show that this proposal is interesting in that it couples an optical beam with an SP CPW with a good reflection coefficient, gain, and broadside radiation pattern.71Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)FAPESP [2010/18857-7, 2013/03947-9

Problemas do pós-parto em porcas: causas e prevenção.

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Comportamento estomático do porta-enxerto CCP 06 e da muda enxertada CCP 76/06, submetidos aos estresses hídrico e salino.

A expansão da cajucultura está apoiada, basicamente, no uso de um único porta-enxerto, para o qual há carência de estudos da interação ambiente e clone enxertado, especialmente dos efeitos dos estresses hídrico e salino, que contribuem para a redução do crescimento e da produtividade das plantas.bitstream/CNPAT-2010/9022/1/Bd-009.pd

Determination of ticlopidine in human plasma by capillary gas chromatography with ion trap detection

A gas chromatographic method for determination of ticlopidine in human plasma using mass spectrometric detection was developed. A Perkin Elmer model 8500 gas chromatograph coupled to an ion trap detector (ITD) in electron impact mode (EI) was used. The gas chromatograph was fitted with a 30 m×0.32 mm i.d., DB-17 capillary column with a film thickness of 0.25 [mu]m. The compounds were isolated from plasma by Extrelut-1 solid-phase extraction using hexane as the solvent of elution. The detection and quantification limits for this method were 0.005 and 0.01 [mu]g/ml, respectively. The calibration curves were linear from 0.01 and 2.5 [mu]g/ml. Recoveries from human plasma spiked at 0.01 and 2.0 [mu]g/ml ranged from 84.4 and 87.3%. The coefficient of variation (CV) was between 5.1 and 6.9%. The results show that the sensitivity, accuracy and precision of the method are adequate for the determination of ticlopidine in human plasma samples. The ITD in SIM mode allows the unequivocal identification of ticlopidine. The suitability of this method was evaluated in the determination of ticlopidine in plasma from healthy volunteers following oral administration of a dose of 500 mg/day.http://www.sciencedirect.com/science/article/B6TGX-48R7F4V-2/1/7f0e17eaa3f9ec2ce371c06ae41c857