A 1998 Social Accounting Matrix for Malawi

The last few years have seen a proliferation of attempts by various institutions to create a framework that would enable analysts to have a broad overview of all transactions in the Malawian economy. It was decided that 1998, the most recent year for which a comprehensive data set is available, would be the base year for the SAM. The National Statistical Office conducted a major household survey which provided information on budget shares, incomes and many other social-economic characteristics of households.Social accounting Malawi. ,Economic surveys Malaw. ,Household surveys Malawi. ,TMD ,

X-ray Flares of EV Lac: Statistics, Spectra, Diagnostics

We study the spectral and temporal behavior of X-ray flares from the active M-dwarf EV Lac in 200 ks of exposure with the Chandra/HETGS. We derive flare parameters by fitting an empirical function which characterizes the amplitude, shape, and scale. The flares range from very short (<1 ks) to long (10 ks) duration events with a range of shapes and amplitudes for all durations. We extract spectra for composite flares to study their mean evolution and to compare flares of different lengths. Evolution of spectral features in the density-temperature plane shows probable sustained heating. The short flares are significantly hotter than the longer flares. We determined an upper limit to the Fe K fluorescent flux, the best fit value being close to what is expected for compact loops.Comment: 9 pages; 9 figures; latex/emulateapj style; Submitted to The Astrophysical Journa

Continued delivery of applied solutions to weed issues in central Queensland

Developing best practices in Central Queensland to (a) manage difficult to control weeds; (b) improve herbicide efficacy under adverse conditions, and (c) manage weeds in wide-row crop systems

Wideband Spectroscopy of Two Radio Bursts on AD Leonis

We report high-time-resolution, broadband spectroscopic observations of two radio bursts on the classical flare star AD Leonis. The observations were acquired by the 305 m telescope at Arecibo Observatory on 2003 June 13-14. Using the Wideband Arecibo Pulsar Processor, these observations sampled a total bandwidth of 400 MHz, distributed over a 500 MHz frequency range, 1120--1620 MHz, with a frequency resolution of 0.78 MHz and a time resolution of 10 ms. A radio burst observed on June 13 is characterized by the presence of multitudes of short duration ($\Delta t \sim$30 ms), high brightness temperature ($T_{b}>10^{14}$K), highly circularly polarized, fast-drift radio sub-bursts, with median bandwidths $\Delta \nu/\nu \sim$5%. The inverse drift rates are small, and have a symmetric distribution (both positive and negative frequency drifts) with a Gaussian FWHM inverse drift rate of 4.5$\times10^{-4}$ s/MHz. The fast-drift sub-bursts occur at a mean rate of 13 s$^{-1}$ and show no evidence for periodic recurrence. The fast-drift radio events on AD Leo are highly reminiscent of solar decimetric spike bursts. We suggest the emission is due to fundamental plasma radiation. A second highly circularly polarized radio burst, recorded June 14, has markedly different properties: a smoothly varying intensity profile characterized by a slow drift in frequency with time (-52 MHz s$^{-1}$). Under the assumption that the source is due to a disturbance propagating through the low corona, a source size of 0.1--1 R$_{\star}$ is inferred, implying a brightness temperature range 6$\times10^{11}$--6$\times10^{13}$K: another example of a coherent radio burst.Comment: 21 pages, 7 figures, accepted for publication in the Astrophysical Journa