1,110 research outputs found
Nueva especie de Trissopelopia Kieffer, 1923 (Diptera, Chironomidae, Tanypodinae, Pentaneurini) de la India
The pupae and adults of Trissopelopia bifurcata sp. n. are recorded and described from the Darjeeling Himalayas of India. The genus is recorded for the first time in India. A new key to the world species of Trissopelopia is also included.Se describen las pupas y los adultos de Trissopelopia bifurcata sp. n. procedentes del Darjeeling Himalayas (India). Es la primera cita del género en la India. Se proporciona, asimismo, una nueva clave mundial de las especies de Trissopelopia
Una nueva especie de ortocladino de Rheocricotopus Thienemann & Harnisch (Diptera, Chironomidae) de Darjeeling–Sikkim, en el Himalaya indio
The adults and pupa of a new species, Rheocricotopus rarispina are described from the Darjeeling–Sikkim Himalayas in India. The species is distinguished by the few spines on the thoracic horn, anal lobe without fringe and bristle–like L setae and presence of ovoid humeral pit, nine squamal setae, structure of anal point and triangular and subterminal crista dorsalis in the adult male. With this new species, the number of Indian species of the genus rises to six.En este trabajo se describen los ejemplares adultos y las crisálidas de una nueva especie, Rheocricotopus rarispina, procedente de Darjeeling–Sikkim, en el Himalaya indio. Dicha especie se identifica por la existencia de algunas espinas en el cuerno torácico, el lóbulo anal sin franja y sin setas parecidas a cerdas en forma de L, la presencia de una cavidad humeral ovoide, nueve setas escamosas, la estructura de la cresta anal y cresta dorsal triangular y subterminal en el macho adulto. Con ésta, el número de especies de origen indio del género asciende ya a seis
A Compact Elliptical Microstrip Patch Antenna for Future 5G Mobile Wireless Communication
International audienceIn this paper an elliptical inset fed microstrip patch antenna is proposed for future fifth generation (5G) mobile communications. The antenna is mounted on a compact Fr-4 substrate having dimensions 5 X 5 X 1.6 mm 3 with relative permittivity (ε r) 4.4.The antenna is simulated in the HFSS software and the simulated results shows that it is operating at 28 GHz for reflection coefficient (S 11) below-10dB and has relatively stable radiation pattern
Superconducting properties of very high quality NbN thin films grown by high temperature chemical vapor deposition
Niobium nitride (NbN) is widely used in high-frequency superconducting
electronics circuits because it has one of the highest superconducting
transition temperatures ( 16.5 K) and largest gap among
conventional superconductors. In its thin-film form, the of NbN is very
sensitive to growth conditions and it still remains a challenge to grow NbN
thin film (below 50 nm) with high . Here, we report on the superconducting
properties of NbN thin films grown by high-temperature chemical vapor
deposition (HTCVD). Transport measurements reveal significantly lower disorder
than previously reported, characterized by a Ioffe-Regel ()
parameter of 14. Accordingly we observe 17.06 K (point of
50% of normal state resistance), the highest value reported so far for films of
thickness below 50 nm, indicating that HTCVD could be particularly useful for
growing high quality NbN thin films
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