Ultrasonic emission method enables testing of adhesive bonds

Detection of acoustic energy emitted by adhesive bonds subjected to tensile stresses at frequencies above sixteen kilocycles per second is used as a method for determining bond strength. This method is used in measuring adhesive bond strengths on metal honeycomb core panels

Dot patterns provide reproducible flaw areas for study of adhesive bonds

Photographic production of a small-dot pattern of known geometry on the surface of a substrate for controlled area degradation enables a study of adhesive bond strengths. These dot patterns may also be applied to force-limiting devices which must depend on the adhesive bonding strength between mating surfaces

The Optimal Processor Tariff Under the Byrd Amendment

International Relations/Trade,

Ethanol from Sugar: The Case of Hidden Sugar Subsidies in Brazil

Agricultural and Food Policy, Resource /Energy Economics and Policy,

Sweetener-Ethanol Complex in Brazil, the United States, and Mexico: Do Corn and Sugar Prices Matter?

Sugar is a major commodity, produced and traded around the world, but it is no longer the only sweetener. For example, in the United States, roughly 50 percent of the sweetener market is made up of high fructose corn syrup (HFCS), which is also making inroads into Mexico. This is not the case, however, for the European Union and countries such as Brazil, which dominates the world sugar market in almost all aspects (Schmitz, 2002). In the United States, 8 to 10 percent of the U.S. corn crop goes into HFCS production, with roughly the same percentage of corn being used for the production of ethanol (Schmitz and Polopolous, 1999). In Brazil, however, sugarcane, rather than corn, is used in the production of ethanol. Because of relative price differences for corn and sugar, along with government subsidies, countries like Brazil will remain heavily dependent on sugar for both its sweetener needs and ethanol production.International Relations/Trade, Resource /Energy Economics and Policy,

Nondestructive testing for evaluation of strength of bonded material

Nondestructive testing of adhesive bond strengt

Relation Between Bulk and Interface Descriptions of Alloy Solidification

From a simple bulk model for the one-dimensional steady-state solidification of a dilute binary alloy we derive an interface description, allowing arbitrary values of the growth velocity. Our derivation leads to exact expressions for the fluxes and forces at the interface and for the set of Onsager coefficients. We, moreover, discover a continuous symmetry, which appears in the low-velocity regime, and there deletes the Onsager sign and symmetry properties. An example is the generation of the sometimes negative friction coefficient in the crystallization flux-force relation