8,438 research outputs found
Savings and Financial Sector Development: Panel Cointegration Evidence from Africa
financial sector development, private savings, panel cointegration tests, Africa
Financial Sector Development - Futile or Fruitful? An Examination of the Determinants of Savings in Sri Lanka
saving, financial sector development, cointegration, principal components, Sri Lanka
Cherenkov-drift emission mechanism
Emission of a charged particle propagating in a medium with a curved magnetic
field is reconsidered stressing the analogy between this emission mechanism and
collective Cherenkov-type plasma emission. It is explained how this mechanism
differs from conventional Cherenkov, cyclotron or curvature emission and how it
includes, to some extent, the features of each of these mechanisms. Presence of
a medium supporting subluminous waves is essential for the possibility of wave
amplification by particles streaming along the curved magnetic field with a
finite curvature drift. We suggest an analogy between the curvature drift
emission and the anomalous cyclotron-Cherenkov emission. Treating the emission
in cylindrical coordinates in the plane-wave-like approximation allows one to
compute the single particle emissivity and growth rate of the Cherenkov-drift
instability.
We compare the growth rates calculated using the single particle emissivity
and using the dielectric tensor of one dimensional plasma streaming along the
curved field. In calculating the single particle emissivity it is essential to
know the normal modes of the medium and their polarization which can be found
from the dielectric tensor of the medium.
This emission mechanism may be important for the problem of pulsar radio
emission generation
Anode power deposition in applied-field MPD thrusters
Anode power deposition is the principal performance limiter of magnetoplasmadynamic (MPD) thrusters. Current thrusters lose between 50 and 70 percent of the input power to the anode. In this work, anode power deposition was studied for three cylindrical applied magnetic field thrusters for a range of argon propellant flow rates, discharge currents, and applied-field strengths. Between 60 and 95 percent of the anode power depositions resulted from electron current conduction into the anode, with cathode radiation depositing between 5 and 35 percent of the anode power, and convective heat transfer from the hot plasma accounting for less than 5 percent. While the fractional anode power loss decreased with increasing applied-field strength and anode size, the magnitude of the anode power increased. The rise in anode power resulted from a linear rise in the anode fall voltage with applied-field strength and anode radius. The anode fall voltage also rose with decreasing propellant flow rate. The trends indicate that the anode fall region is magnetized, and suggest techniques for reducing the anode power loss in MPD thrusters
Eductive stability in real business cycle models
We re-examine issues of coordination in the standard RBC model. Can the unique rational expectations equilibrium be âeducedâ by rational agents who contemplate the possibility of small deviations from equilibrium? Surprisingly, we find that coordination along this line cannot be expected. Rational agents anticipating small but possibly persistent deviations have to face the existence of retroactions that necessarily invalidate any initial tentative âcommon knowledgeâ of the future. This "impossibility" theorem for eductive learning is not fully overcome when adaptive learning is incorporated into the framework.standard RBC model ; coordination
Economic Impact Analysis of Marker-Assisted Breeding in Rice
The benefits of developing and releasing salinity-tolerant and phosphorous-deficiency-tolerant rice in Bangladesh, India, Indonesia and the Philippines were estimated for marker-assisted breeding as compared to conventional breeding using economic surplus analysis. Marker-assisted breeding is estimated to save at least 2 to 3 years in the breeding cycle and result in incremental benefits over 25 years in the range of 800 million depending on the country, stress, and time lags. Salinity and phosphorous deficient soils are difficult problems to solve through conventional breeding because of âgenetic loadâ or undesirable traits that accompany desirable ones during backcrossing. MAB, enabled by advances in genomics and molecular mapping is more precise and hence time-saving. Solving salinity and P-deficiency problems is important, regardless of whether MAB or CB is used, as the cumulative benefits are at least 4 billion over the next 25 years depending on the problem and country.Crop Production/Industries,
THE ECONOMIC IMPACT OF PEANUT RESEARCH ON POVERTY REDUCTION: RESISTANCE STRATEGIES TO CONTROL PEANUT VIRUSES IN UGANDA
Economic impacts of research that developed Rosette Virus-resistance peanut in Uganda are estimated. Changes in economic surplus are calculated and combined with household data to assess changes in poverty rates and effects on livelihoods of the poor. The poverty rate may decline up to 1.5 percent as a result of the research.Research and Development/Tech Change/Emerging Technologies,
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