1,357,346 research outputs found
Surface-micromachined Silicon Carbide Pirani Gauges for Harsh Environments
No full textThe application of pressure sensors in harsh environments is typically hindered by the stability of the material over long periods of time. This work focuses on the design and fabrication of surface micromachined Pirani gauges which are designed to be compatible with state-of-the-art Silicon Carbide CMOS technology. Such an integrated platform would boost harsh environment compatibility while reducing the required packaging complexity. An analytical model was derived describing the design variables of the Pirani gauges followed by Finite Element Analysis. The Pirani gauges were fabricated in a CMOS compatible cleanroom with a process employing only three masks, thus suitable for mass production. The SiC-based Pirani gauge is far more competitive than the traditional Si-based Pirani gauge in terms of endurance in high-temperature environments. From 25°C to 650°C, the gauge shows a reproducible response to pressure changes and has a maximum sensitivity of /Pa at room temperature, and of /Pa at 650°C. Additionally, some of the gauges were demonstrated to operate at temperatures up to 750°C.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 Components, Technology and MaterialsQN/Zandbergen La
Uomini e istituzioni a San Marino nel XIII secolo
No full text[“Quaderni del Centro di Studi Storici Sammarinesi”, 22
A miniaturized low power Pirani pressure sensor based on suspended graphene
No full textWorlds first graphene-based Pirani pressure sensor is presented. Due to the decreased area and low thickness, the graphene-based Pirani pressure sensor allows for low power applications down to 0.9 mW. Using an innovative, transfer-free process, suspended graphene beams are realized. This allows for up to 100x miniaturization of the pressure sensor area, while enabling wafer-scale fabrication. The response of the miniaturized pressure sensor is similar to that of the much larger state-of-the-art Si-based Pirani pressure sensors, demonstrating the potential of graphene-based Pirani sensors.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 Components, Technology and MaterialsQN/Steeneken LabQN/van der Zant LabDynamics of Micro and Nano System
La percezione del consumatore di prodotti biologici per una corretta strategia di marketing. Una verifica alle politiche dei negozi specializzati
No full textIl contributo descrive uno studio effettuato in una rete retail specializzata nella vendita di prodotti di origine biologica di nuova costituzione in cui è stato possibile monitorare il “successo” della sua costituzione, “progettata” secondo le fondamentali regole del marketing, attraverso la percezione del consumatore
Cladochaeta atlantica Pirani & Amorim 2016
No full textCladochaeta atlantica Pirani & Amorim, 2016 (Figs. 27–28) Cladochaeta atlantica Pirani & Amorim, 2016: 327 –328, Figs. 24 A–F, 25 A–C, 34 A, 35 L Material examined. BRAZIL: Espírito Santo: Estação Biológica de Santa Lúcia, Santa Teresa, Atlantic Forest, 550m, dense ombrophilous montane forest, T. G. Kloss [collector], reared from spider egg sacs of the spider Cryptachaea migrans, 23.X.2014 (1 ♂), 31.X.2014 (1 ♂), 04.XII.2014 (1 ♀) (all deposited in MPEG). Description of female. Differs from the description of the male showed by Pirani & Amorim (2016) as follow: Female terminalia (Fig. 28): Hypoproct narrowed distally, with microtrichosity and setae concentrated on posterior margin. Apical sternite wider than high, entire, with posterior margin bilobed, with three setae and microtrichosity restricted to the lobes. Penultimate sternite broad, shield-like, with a deep median cleft with almost parallel inner edges in posterior margin, without setae. Distribution. NEOTROPICAL—Brazil (Espírito Santo, São Paulo). Remarks. The female terminalia of C. atlantica is similar to that of C. labidia Grimaldi & Nguyen in having apical sternite with posterior margin entire and bilobed, but the number of setae in the lobes are different between these species (three in C. atalntica and about eight in C. labidia). Biology. The specimens of C. atlantica were obtained from the spider egg sacs of Cryptachaea migrans (Keyserling, 1884) (Araneae: Theridiidae) (Fig. 29) collected in a montane ombrophilous Atlantic Forest at an altitude of 550 m. This spider utilizes dry leaf as retreat (Figs. 29–30). Of 124 collected egg sacs, only three were attacked by this fly. One egg mass was completely consumed by the fly larva, while the other two were partially consumed and from these emerged spiderlings. This is the first record of a species of Cladochaeta attacking a spider egg sac. The breeding habits of drosphilids are diversified, but there are few records of these flies parasitizing the egg sacs of spiders, which are restricted to some species of Scaptomyza Hardy (subgenus Titanochaeta Knab) in the Hawaiian Islands and Australia, that attack Thomisidae eggs (Wirth 1952, Hardy 1965, Austin 1985).Published as part of Carvalho-Filho, Fernando Da Silva, Pirani, Gabriela & Kloss, Thiago Gechel, 2018, A new species and notes on unusual natural history of Cladochaeta Coquillett, 1900 (Diptera: Drosophilidae), pp. 483-496 in Zootaxa 4410 (3) on page 491, DOI: 10.11646/zootaxa.4410.3.3, http://zenodo.org/record/122179
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