26,027 research outputs found
Bose-Einstein Correlations and Sonoluminescence
Sonoluminescence may be studied in detail by intensity correlations among the
emitted photons. As an example, we discuss an experiment to measure the size of
the light-emitting region by the Hanbury Brown-Twiss effect. We show that
single bubble sonoluminescence is almost ideally suited for study by this
method and that plausible values for the physical parameters are within easy
experimental reach. A sequence of two and higher order photon correlation
experiments is outlined.Comment: Latex File, 8 pages, Postscript file with 2 figs. attache
Operational Trans-Resistance Amplifier Based Tunable Wave Active Filter
In this paper, Operational Trans-Resistance Amplifier (OTRA) based wave active filter structures are presented. They are flexible and modular, making them suitable to implement higher order filters. The circuits implement the resistors using matched transistors, operating in linear region, making them well suited for IC fabrication. They are insensitive to parasitic input capacitances and input resistances due to the internally grounded input terminals of OTRA. As an application, a doubly terminated third order Butterworth low pass filter has been implemented, by substituting OTRA based wave equivalents of passive elements. PSPICE simulations are given to verify the theoretical analysis
Economic potential of forest resources of Nepal
Nepal's forest resources underpin the livelihoods of rural people in important ways. During the country's 'planned development' over the past 50 years, the government, donors and policy makers have viewed these resources as a key vehicle for ushering in economic growth and for meeting basic needs. They underscore the potential value of forest
resources for achieving conservation and socio-economic objectives. To what extent have economic incentives been generated to effectively harness these resources to meet the
said objectives is an open question. To address this question, this paper reviews briefly and broadly the economic potential of the country's forest resources in terms of forest goods and services. Estimates of economic potential of timber and non-timber forest products and environmental services have been assessed. A number of recommendations for realizing the potential for achieving development and poverty reduction objectives is provided
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