We present a method that derives the dust temperatures and infrared (IR) luminosities of high-redshift galaxies assuming radiation equilibrium in simple stellar distribution geometry. Using public data from Atacama Large Millimeter/submillimeter Array (ALMA) archive, we studied clumpy interstellar medium (ISM) model for galaxies, then tested consistency our results with those obtained using oth...

This paper presents the design and realization of a compact size multimode frequency reconfigurable antenna. The antenna consists triangular-shaped monopole radiator, originally inspired from rectangular Slots were utilized to notch desired while PIN diodes achieve reconfigurability. can operate in wideband, dual-band, or tri-band mode depending upon state diodes. To validate simulation results...

An electrically small antenna based on a dielectric resonator antenna (DRA) is investigated. Two wellknown simulation techniques, the finite element method and the finite integration technique have been applied to study a low volume high permittivity DRA. It is demonstrated that the design of a compact size and wide frequency coverage DRA for 2.4–2.5 GHz ISM frequency band is possible by proper...

The proposed system provides real time tracking application that provides location of the mobile unit to the fixed control unit as well as display advertisements. The location of the object is seen on the map on the computer interfaced with the central unit. The ZigBee module designed to operate within the ZigBee protocol to support GPS tracking system in terms of latitude and longitude. The mo...

This paper investigates the performance of cooperative receive diversity, for the wireless body area network (WBAN) radio channel, compliant with the IEEE 802.15.6 Standard, in the case of monitoring a sleeping person. Extensive WBAN measurements near the 2.4 GHz ISM band were used. Up to 7 dB and 20% improvement for two-hop communications with the use of relays are empirically demonstrated wit...

A 2.45 GHz pulse compression, channel impulse response (CIR) system is described. The motivation for its development and results verifying its performance are given. The system is shown to be an effective test and measurement tool for analysis of 2.4 GHz ISM band channels particularly for spread spectrum communication system deployment. The required signal processing is described and, because o...

A low-profile dual-band half-mode substrate-integrated cavity antenna with a fully shielded textile feeding mechanism is presented for wearable applications. The antenna operates at the lower and upper microwave industrial, scientific and medical (ISM) bands. The cavity geometry is accurately defined with conducting thread through computerized embroidery. Design guidelines are developed for a p...

We consider the gamma-ray burst of 1997 February 28 (GRB 970228) within the ElectroMagnetic Black Hole (EMBH) model. We first determine the value of the two free parameters that characterize energetically the GRB phenomenon in the EMBH model, that is to say the dyadosphere energy, E dya = 5.1 × 10 52 ergs, and the baryonic remnant mass M B in units of E dya , B = M B c 2 /E dya = 3.0 × 10 −3. H...

In this paper, we investigate coexistence of collocated 802.11 and Bluetooth technologies in 2.4 GHz industrial, scientific, and medical (ISM) band. To that end, we show a time division multiplexing approach suffers from the “avalanche effect”. We then provide remedies to avoid this effect and improve the performance of the overall network. For example, it is shown that a simple request-to-send...