The feed for reflectarrays and transmitarrays is crucial determining the overall antenna aperture efficiency, gain, power handling. In past, several methods, such as altering horn shape to achieve higher modes, have been employed modify radiation pattern improve these key parameters. However, another approach use gradient index (GRIN) lenses, which offer unprecedented control over can be used s...

Satellite broadcasting of UHDTV in Japan has used the 12-GHz band (11.7 to 12.75GHz) since 2018. The 21-GHz (21.4 22.0GHz) also been allocated satellite Europe, Africa, and Asia Pacific. BSAT-4a not only 12-GHz-band transponders for services, but 21-GHz-band experimental future services. To receive services using these two frequency bands with a single antenna, we designed 12- dual-band horn an...

This study was conducted to evaluate the effect of subcutaneous administration of synthetic eugenol (EG) for disbudding of goat kids, as a new chemical method. Thirty apparently healthy Raieni (Cashmere) goat kids (five-day-old) were divided randomly into six groups (n = 5). In the pathology (P) groups (P3, P8 and P60 according to the sample collection day after...

We present the design, manufacturing and performance of horn-switch system developed for technological demonstrator QUBIC (the $Q$\&$U$ Bolometric Interferometer Cosmology). This is constituted 64 back-to-back dual-band (150\,GHz 220\,GHz) corrugated feed-horns interspersed with mechanical switches used to select desired baselines during instrument self-calibration. manufactured horns in alumin...

background: the purpose of dehorning in cattles is to decrease injuries and increase security in farms. besides breeding managements, different chemical and physical methods are used for dehorning of livestock, depending on their age, each of which has advantages and disadvantages. objectives: this study was performed to evaluate the effects of clove oil on disbudding new born calves following ...

Tabanids are among the most free-living adult flies which play a role as livestock pests. A single blood meal is used as a source of energy for egg production (100-1,000 eggs per meal), and females of certain species can oviposit before a blood meal is obtained (autogeny). Therefore, the maintenance of annual populations requires successful oviposition by only 2% of females. Wild animal blood s...

A semi-infinite tube is joined to a semi-infinite cone. Waves propagating in the tube towards the join are partly reflected and partly radiated into the cone. The problem is to determine these wave fields. Two modal expansions are used, one in the tube and one in the cone. However, their regions of convergence do not overlap: there is a region D near the join where neither expansion converges. ...

introduction pelvic pain results from many causes such as primary dysmenorrhea, uterine anomalies, menstrual outflow obstruction, endometriosis, myoma and adenomyosis. this study reports on a rare case of non-communicating functional rudimentary horn. case presentations a 15-year-old nulligravida young woman with a history of severe intermittent pelvic pain presented a 4-5 centimeter mass. a su...