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 ($T_c$ $\sim$ 16.5 K) and largest gap among conventional superconductors. In its thin-film form, the $T_c$ of NbN is very sensitive to growth conditions and it still remains a challenge to grow NbN thin film (below 50 nm) with high $T_c$. 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 ($k_F$$\ell$) parameter of $\sim$ 14. Accordingly we observe $T_c$ $\sim$ 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