Global ETD Search

1	Quantifying Losses of Understory Forage in Aspen Stands on the Dixie and Fishlake National Forests Stam, Barton R. 01 May 2004 (has links) The West has lost up to 60% of its historic aspen stands over the last century, probably as a result of the successional tendency of aspen to be replaced by coniferous species in the absence of periodic fires. One of several major impacts of this change is the loss of understory forage as conifer canopy cover increases. I measured understory biomass in aspen stands ranging from 0% to 81 % absolute conifer cover in the canopy Ill and found that understory production declines exponentially as conifers replace aspen. I also did an economic analysis to determine the value of the forage that is not being produced by aspen sites due to a presence of coniferous species within the tree canopy. Study results indicate significant losses in forage, marketable through the sale of livestock, and losses in revenue generated through grazing fees for the USDA Forest Service. quantifying losses understory forage apsen coniferous species Ecology and Evolutionary Biology Environmental Sciences Forest Sciences Plant Sciences
2	APSEN Analysis for Beyond 3G Wireless Networks / APSEN Analysis for Beyond 3G Wireless Networks QADEER, MUHAMMAD, KHAN, MUHAMMAD HUMRAN January 2009 (has links) The beyond 3G official IEEE name for next generation of wireless technology, some people also called it as 4G (fourth-generation) mobile communication systems. Beyond 3G will be used largely to contain not only cellular telephone systems but also several types of broadband wireless access communication systems, have been attracting much interest in the mobile communication field. A new age has begun for telecommunication industry. Over the past decade wireless industry has grown at a remarkable pace, consequently level of technology development goes beyond the level of customer desire. Application flexibility and being highly dynamic will be the main features of beyond 3G services of interest to users. Being there all these emerging technologies in one cellular network has opened the work of designing and optimization of the networks to be viewed from a different perspective. APSEN analysis for Beyond 3G wireless networks has been discussed. “AP” stands for application layer, analysis of services and applications. “SE” stands for session layer, analysis of session management protocol and “N” for network layer, analysis for network protocols. The main purpose of our research is to focus on the challenges offered at APSEN for beyond 3G wireless network. There are a lot of research challenges in each of the different layers but focus will be on APSEN. The objective is to take a look at and familiarize with some of the major challenges offered at APSEN for beyond 3G wireless network. Qualitative approach has been used which will help us to collect wide range of information and enhance our knowledge by analyzing the perspectives of different researchers. B3G 4G APSEN QoS OSI MIND PUD NMT AMPS VAS GPRS EDGE UMTS 3GPP SDP SAP MCHO Mobility management TLDN Mobile IP. Signal Processing Signalbehandling Computer Sciences Datavetenskap (datalogi) Telecommunications Telekommunikation

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Quantifying Losses of Understory Forage in Aspen Stands on the Dixie and Fishlake National Forests

APSEN Analysis for Beyond 3G Wireless Networks / APSEN Analysis for Beyond 3G Wireless Networks