Western juniper (Juniperus occidentalis) encroachment has been associated with negative ecological and hydrological consequences including reductions in herbaceous production and diversity, deterioration for wildlife habitat, and higher erosion and runoff potentials. As a result, western juniper removal is a common and accepted rangeland management practice. Although studies evaluating the ecological...
Desert plant communities are among the most sensitive to changes in soil water conditions. In areas with shallow aquifers, it is important to understand both the effects of groundwater alterations on vegetation and how changes in surface-soil water affect plant water uptake. Studies in arid environments have evaluated the effect...
Finding renewable sources of agricultural fertilizer will be necessary to ensure a stable food supply for future generations. Phosphorus is of particular concern, since mining phosphate rock is the main source and reserves are forecasted to deplete in the next 50 – 200 years. Human urine contains substantial amounts of...
In this research, a novel shunt compensation scheme
design procedure is developed for unbalanced, untransposed
n-phase transmission lines. The main function of the
scheme is to reduce the effect of the capacitive coupling
on untransposed transmission lines to levels where successful
single-pole switching is assured. The analysis procedure
is carried...
Cognitive Radio Networks (CRNs) enable opportunistic access to the licensed channel resources by allowing unlicensed users to exploit vacant channel opportunities. One effective technique through which unlicensed users, often referred to as Secondary Users (SUs), acquire whether a channel is vacant is cooperative spectrum sensing. Despite its effectiveness in enabling...
This research was conducted to determine the effects of
temperature and competition on seedling root and shoot growth of
cheatgrass (Bromus tectorum L.) and 5 collections of Idaho fescue
(Festuca idahoensis. Elmer). For the temperature study, seedlings
were grown in environmental chambers with 16 hours day/8 hours night, at
temperatures...
Germination strategies and early seedling development
of selected Medicago and Hedysarum species were evaluated to
identify plants with high potential for range rehabilitation
in central Tunisia. Temperature (5°C to 25°C) and water
stress (0 MPa to -0.8 MPa) affected the germination
percentage of all Medicago and Hedysarum species. Water
stress...
The cleanliness of water is a major issue with regards to humanity's continued survival. The chlorination and chloro-amination of water is essential to the creation of microbiologically clean water. However these processes also give rise to oxidative byproducts such as nitrosamines. In particular, due to its high toxicity, N-Nitrosodimethylamine (NDMA)...
Five nutritional aspects of 'Valencia' orange production in Agadir, Morocco
during 1989-1991 were evaluated: 1) the effect of N and K on yield and fruit
quality, 2) leaf sampling time and diagnostic approaches to optimize mineral
nutrition, 3) mass and mineral partitioning within individual trees, 4) K-Rb
relationships, and 5)...
The scarcity of wireless spectrum resources and the overwhelming demand for wireless broadband resources have prompted industry, government agencies and academia within the wireless communities to develop and come up with effective solutions that can make additional spectrum available for broadband data. As part of these ongoing efforts, cognitive radio...