Search for an adapted forage species for feed production under existing marginal lands and harsh conditions is needed to overcome sever feed shortage in Egypt. Sesbania, Sesbania aegyptiaca (Sesbania sesban, L) has shown potential for forage production and being included in grazing systems, especially on marginal lands and salt–affected soils. An experiment was conducted in the summer of 2004 a...

Spiral-waveguide amplifiers in erbium-doped aluminum oxide on a silicon wafer are fabricated and characterized. Spirals of several lengths and four different erbium concentrations are studied experimentally and theoretically. A maximum internal net gain of 20 dB in the small-signal-gain regime is measured at the peak emission wavelength of 1532 nm for two sample configurations with waveguide le...

For isolated objects in complete darkness, retinal image size contributes to distance judgments even if the true object size is unknown. Here we show that the same is true under more natural conditions. On a wide beach we positioned a red cube at 10-20 m distance and then asked subjects to walk to it while blindfolded. Subjects never had a close view of the cube and were unaware that on separat...

Materials Scrap paper torn into 1” x 1” (2.5 cm x 2.5 cm) pieces (paper towels, construc tion paper, and toilet paper work well; a large bowl; a wooden frame 5” x 7” (13 cm x 18 cm) or 8” x 10” (20 cm x 25 cm); nylon or wire screen; staples; a plastic basin at least 2.5 gallons (9.5 liters) in capacity, that is larger than the frame; cloth dishtowels (felt, blotting paper, or newspaper may subs...

A name cannot change the city and our relationship with places. However, new terms for now-nameless spaces will help to change people’s perception and their capability of seeing what they have never seen before. The geographer’s taxonomic effort to re-designate urban places and typologies involves a political and ideological content. Most urban spaces are unmanageable because they fit neither w...

so far a number of works on the heat flux anomalies of the earth surface based on the satellite images and underground water as seismic precursors have been carried out. in this paper the soil temperature data at 1m depth (deep enough to filter temperature variation due to high frequency meteorological forcings) has been considered to see if there are connections between earthquakes in bam and ...