One way to rtidiate m impulse-like waveform is to employ a TEM-fed paraboloidal reflector mtenna. Various performance features of this antenna, such as prcpulse, impulse amplitude, impulse width etc., h:~vcbeen an;dyzcd in the past ( 1 to 8]. It hos been obscrveci that the low frequency or Iatc-time pcrforrmmce of this fotm of an IRA is governed by the elecrnc and magnetic dipole morncnts. A kn...

The Atacama B-mode Search (ABS) instrument, which began observation in February of 2012, is a crossed-Dragone telescope located at an elevation of 5,100 m in the Atacama Desert in Chile. The primary scientific goal of ABS is to measure the B-mode polarization spectrum of the Cosmic Microwave Background from multipole moments of about ≈ 50 to ≈ 500 (angular scales from ∼0.4◦ to ∼4◦), a range tha...

A dually symmetric orthomode transducer (OMT) and horn antenna are presented for both single port linearly polarized operation dual circular polarization use. The feed uses two waveguide splitters a bend to four-port that has the groups of ports orthogonal each other produce radiation pattern. is printed from 316L stainless steel while plastic polymer metallized using aluminum tape. structure b...

In this paper, a Ka/K-band antenna-feeding network in dual-circular polarization is reported. The design of the system was carried out view its monolithic manufacturing through selective laser melting AlSi10Mg alloy. As proof-of-concept for satellite telecommunication multi-beam applications, feeding operates K band (19.25, 20.75) GHz and Ka (27.0, 29.0) GHz. provides four rectangular-waveguide...

Substance P (SP) is a neuropeptide well known for its contribution to pain transmission in the spinal cord, however, less is known about the possible modulatory effects of SP. A new study by Gu and colleagues, published in Molecular Pain (2005, 1:20), describes its potential role in feed-forward inhibition in lamina V of the dorsal horn of the spinal cord. This inhibition seems to function thro...

The absolute temperature of the cosmic microwave background (CMB) has been measured at a frequency of 1280 MHz. The observation was made with a modified version of the L-band receiver used in the Giant Metre wavelength Radio Telescope (GMRT): the feed horn was replaced by a corrugated plate and the receiver was placed on the ground, directed at zenith, and shielded from ground radiation by an a...

Cutaneous horn is a horn-like keratotic lesion, which commonly occurs on the head and face, over a wide range of benign or malignant skin lesions. Callosity is a hyperkeratotic plaque produced by intermittent or continuous pressure on the skin. Lateral aspects of the ankles (Lateral malleoli) are frequently involved. We report a rare case of cutaneous horn developed on ankle callosity.

Biodegradation of livestock processing waste is one the more cost-effective, ecologically safe recycling methods thatmay preserve nutritional content and key amino acids useful in animal feed production. Here, we determined thebiodegrading potentials nonconventional feedstuffs using a combination bacteria (Bacillus subtilis) fungi(Fusarium sp.). Five types (feather meal, hair waste, egg membran...

We propose a circular polarizer with beamforming features based on frequency selective surface (FSS), in which a modified anchor-shaped unit cell is used to reach the circular polarizer function. The beamforming characteristic is realized by a particular design of the unit-phase distribution, which is obtained by varying the scale of the unit cell. Instead of using plane waves, a horn antenna i...