On the Forced Convective Flow between Two Corrugated Cylinders
The forced heat convection in the flow between two corrugated cylinders, whose generators are parallel to the flow direction, is studied through perturbation on the small amplitude of the corrugations. The coupled effects of frictional heating and non-linear interaction of the boundaries on the heat transfer rate are obtained.
Natural convection along a vertical wavy surface
Application d'une methode de transformation a l'etude de la convection naturelle le long de surfaces verticales irregulieres. Utilisation d'une surface sinusoidale comme exemple specifique afin de demontrer les avantages de la methode de transformation et afin de mieux comprendre le mecanisme de transfert de chaleur au voisinage de telles surfaces. Resultats numeriques montrant que la frequence du taux de transfert de chaleur local est double de celle de la surface ondulee
Trade, exchange rate, and agricultural pricing policies in Thailand
Thailand is still largely an agricultural country. In 1984, agricultural work was still the main source of earnings for more than 70 percent of the population. For much of the 25 year period covered by this report, government intervention in the prices of rice, maize, and natural rubber was extensive. For these products, intervention took the form of explicit export taxes and restrictive quotas. Sugar, on the other hand, was imported until 1960. For many years prior to that, government policy was to encourage growers and thus achieve self-sufficiency. One conclusion of this study is that the Thai sugar industry would have shrunk dramatically if the government had refrained from intervention. Intervention in the prices of rice and natural rubber had the effect of penalizing farm producers by reducing their output prices. There was, as a consequence a shift of resources towards Thailand's small industrial sector. In 1981, the Thai government lifted its quota restrictions, and liberalized its trade by eliminating its intervention in the maize, rice, sugar and natural rubber markets. Unfortunately for export growers, however, the gradual elimination of intervention was overshadowed by sharp declines in the world prices of Thailand's major agricultural exports.