Distributed collector solar fields are spatially distributed engineering systems which aim at collecting and storing energy from solar radiation. They are formed by mirrors which concentrate direct incident sun light in a pipe where an oil able to accumulate thermic energy flows. From the control point of view, the objective consists of making the outlet oil temperature to track a reference sig...

this paper analyzes the effects ofexchange policies on iran,s foreign trade, by applying new econometric techniques. in assessing the impacts of depreciation of the national currency on macroeconomic variable, the real rather than nominal exchange rate has been determined to be more appropriate criterion to demonstrate the success or failure ofthe adopted policies. during the period under the s...

abstract: the tax capacity is one of the main concepts in public finance and provides the required information on state economic power in mobilizing the tax resources for responding the financial problems and execution of economic policies. for this purpose, the main objective of this paper is to estimate the tax capacity for oil exporting countries over the period of 1995-2008 by applying pane...

ethoxylated fatty acids or polyoxyethylene esters of fatty acids possess surface active characteristic depending on ethoxylation degree (glycol type used).they have a wide range of applications and are known by formulated trade names.fatty acids used as starting materials are obtained by the hydrolysis of fats and oils and thus the final products are fully biodegradable.the objective of this in...

We examine the relative ability of inflation targeting and price level monetary policy rules to minimize variability business cycle fluctuations in a commodity-exporting country for supply demand shocks global commodity markets. The macroeconomic consequences oil non-oil primary commodities differ affect merits alternative frameworks. Particularly, consumption refined products demand-driven mov...

Oil prices, associated with bouts of inflation and economic instability over the last 30 years, have been rising in recent months. We argue that the inflationary consequences of a rise in oil prices depend upon the policy response of the monetary authorities. They can ameliorate the short term impacts on output, but only at the cost of higher inflation. In the short term the size and distributi...

Origin and Geographic Distribution Oil palm is native to Africa and it is assumed that speciation took place in that continent. However since all related species classifi ed in the subfamily Cocoideae have a South American origin (except perhaps the coconut, Cocos nucifera), the archetypal ancestor may have been indigenous to the Americas. Oil palm occurs in palm groves throughout the tropical ...

This paper explores the used motor oil markets in California under the regulatory scheme along with potential distortions introduced from elements of SB 546. California Senate Bill (SB) 545 modified the requirements of the deposit-refund system (DRS) for used oil outlined in the California Oil Recycling Enhancement Act (COREA) by introducing a differential fee and incentive system. The motivati...

We present a theory of why some countries negotiate trade agreements during economic downturns. We argue that political leaders can gain from such agreements because of the signals they send to their publics. Publics are less likely to blame leaders for bad economic conditions when they have implemented sound economic policies, such as signing and implementing agreements designed to liberalize ...

In this article, real exchange rate behavior and its effects on macroeconomic variables are studied by explaining two models; impulse function and forecasting predicted error decomposition. Studies show that high artificial currency value has caused domestic and foreign accounts equilibrium disturbance and foreign income decrease due to the slackening of commercial and agricultural activities, ...