reference evapotranspiration is an important parameter in irrigation systems' design that is evaluated through either direct (lysimeter) or calculated method (empirical equations). when there is a lack of lysimeters' data, penman monteith fao method could be employed as a standard method for evaluating the other empirical methods' results. in this research, 13 year evaporation pa...

Young African Americans have not participated as long as their white counterparts in the media culture industry (Nightingale 1993). In truth, it is difficult to discern a substantive relationship between black youth and the mass media prior to the 1960s. The initial exclusion of blacks from popular media culture is attributable to two main factors: 1) a lack of discretionary income on the part ...

We develop a model of endogenous quality choice and trade that combines non-iceberg trade costs and non-homothetic preferences to capture the effect of importer-exporter income differences on geographic variation in quality and export prices. The differences in income substantially alter the effect of trade costs on quality. The incentive to trade high quality goods given high trade costs (the ...

Although listening quality measurement is well standardized the MOS scale may be to fine and not so easy for interpretation of results, for example for mobile operators. Therefore we thought that in some cases mapping to acceptability scale with less points would be more useful and we tried to find how to map these two scales on each other. For our purposes we used three points scale. We had an...

in the current study, the generalized maximum entropy (gme) and dynamic positive equilibrium problem (dpep) approach were introduced and used to estimate the set of dynamic supply functions of selected annual crops in mashhad-chenaran plain during the years 2003-2011.in addition, the allen and morishima elasticities of derived demand inputs, and supply elasticity of the crops were determined. t...

OBJECTIVES We aimed to establish the pathological types of stroke in two incident populations in Tanzania, one rural and one urban, and to examine the clinical utility of the Siriraj and Allen scores in identifying stroke sub-types. DESIGN This prospective community-based study identified cases as part of a stroke incidence study. Each patient underwent a full assessment including recording d...

III. An Operational Framework for Debt Sustainability Assessments ....................................12 A. General Considerations ...........................................................................................13 B. Empirical Thresholds ..............................................................................................17 C. Analysis of Current and Projected Debt Indicator...