منابع مشابه
Low current density, inverted polarity, high-speed, top-emitting 850 nm vertical-cavity surface-emitting lasers
High-speed, oxide-confined, inverted polarity (n-up), polyimide-planarised 850 nm vertical-cavity surface-emitting lasers (VCSELs) were fabricated and characterised. The lasers exhibit a 23 dB frequency modulation bandwidth ( f3dB) up to 15.2 GHz with a 10 mm oxide aperture diameter, at the lowest current density (Jbias) ever reported of 6.4 kA/cm . The ratio f3dB 2 /Jbias 1⁄4 36.1 (GHz/kA/cm) ...
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In multicellular epithelial tissues, the orientation of polarity of each cell must be coordinated. Previously, we reported that for Madin-Darby canine kidney cells in three-dimensional collagen gel culture, blockade of beta1-integrin by the AIIB2 antibody or expression of dominant-negative Rac1N17 led to an inversion of polarity, such that the apical surfaces of the cells were misorientated tow...
متن کاملRadar and Lightning Observations of Normal and Inverted Polarity Multicellular Storms from STEPS
This study discusses radar and lightning observations of two multicellular storms observed during the Severe Thunderstorm Electrification and Precipitation Study. The Lightning Mapping Array data indicated that the charge structure of the 19 June 2000 storm was consistent with a normal polarity tripole, while the 22 June 2000 storm exhibited an overall inverted tripolar charge structure. The 19...
متن کاملDelimited continuations in natural language: quantification and polarity sensitivity
Making a linguistic theory is like making a programming language: one typically devises a type system to delineate the acceptable utterances and a denotational semantics to explain observations on their behavior. Via this connection, the programming language concept of delimited continuations can help analyze natural language phenomena such as quantification and polarity sensitivity. Using a lo...
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Inverted papillomas of the nose and paranasal sinuses are uncommon neoplasms, characterized by their tendency to occur and by their association with malignancy. In the past decade there has been a trend toward the use of endoscopic surgical techniques in the management of these tumors. This article presents the results of a prospective study of24 patients with inverted papilloma resected by...
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ژورنال
عنوان ژورنال: Nature
سال: 2015
ISSN: 0028-0836,1476-4687
DOI: 10.1038/523417a