Noncontact true temperature measurement, 2

A laser pyrometer was developed for acquiring the true temperature of a levitated sample. The reflectivity is measured by first expanding the laser beam to cover the entire cross-sectional surface of the diffuse target. The reflectivity calibration of this system is determined from the surface emissivity of a target with a blackbody cavity. The emissivity of the real target can then be calculated. The overall system constant is obtained by passively measuring the radiance of the blackbody cavity (emissivity = 1.0) at a known, arbitrary temperature. Since the photosensor used is highly linear over the entire operating temperature range, the true temperature of the target can then be computed. The latest results available from this on-going research indicate that true temperatures thus obtained are in very good quantitative agreement with thermocouple measured temperatures

Noncontact temperature pattern measuring device

Laser pyrometer techniques are utilized to accurately image a true temperature distribution on a given target without touching the target and without knowing the localized emissivity of the target. The pyrometer utilizes a very high definition laser beam and photodetector, both having a very narrow focus. The pyrometer is mounted in a mechanism designed to permit the pyrometer to be aimed and focused at precise localized points on the target surface. The pyrometer is swept over the surface area to be imaged, temperature measurements being taken at each point of focus

BUYER PREFERENCES FOR DURUM WHEAT: A STATED PREFERENCE APPROACH

The central issue addressed in this paper is the attributes preferred by a sample of buyers of durum wheat grown in Canada. Primary emphasis is the value placed on certain visual and nonvisual attributes by US buyers of durum wheat. In addition, a source variable in the analysis is used to test preferences of US buyers for US-source compared to Canadian-source durum. The latter is a method to test whether durum millers in the US believe that Canadian durum is a superior product, a view widely-held in the Canadian grain trade. Results indicate that higher bushel weight has a positive effect on purchase probability, and appears to be more important to buyers' purchasing decision than protein content, amylase content, or the choice between no. 1 and no. 2 grade. US millers in the study are shown either a) to prefer US-grown durum over that from Canada, or b) to dislike the single desk seller arrangement involved in purchasing Canadian durum. It appears that US managers who grow or market durum wheat have a competitive edge over their Canadian competitors when marketing to US-based durum users.Crop Production/Industries, Demand and Price Analysis,

SUPPLY CHAIN COMPETENCY: RECIPE FOR CEREAL AND LIVESTOCK MARKETING IN ALBERTA?

This study examines the nature of Supply Chain Management (SCM) in the Canadian barley industry, economic theories related to SCM, identifies SCM drivers and reviews the Canadian barley marketing system. Two surveys were conducted; one on the feed barley segment of the market; another on the malt barley segment of the market. These surveys provide an outline of the attributes sought by buyers of feed barley in Alberta and by buyers of malt barley in Canada and the United States. A further goal of these surveys was to assess the extent of motivations for SCM in the barley supply chain. Study methods include scaling, factor analysis and stated preference techniques to analyze purchasers' preferences for specific product attributes, business relationships and product source. The major attributes of feed barley sought by Alberta feed manufacturers appear to be physical characteristics such as moisture level, absence of foreign material, high bushel weight and uniform appearance of kernels. Features identified as of moderate importance included levels of certain key amino acids, starch level in the barley sample, as well as such seller characteristics as whether the seller was personally known to the buyer, and willingness of the seller to enter into a long-term supply contract. At the level of the Alberta feed mill industry, results therefore indicate that physical, readily identifiable attributes dominate in the selection of feed barley. As a result, the study identified that SCM is not yet a part of the awareness of barley buyers at feed mills. Among buyers of malt barley, physical or easily assessed attributes such as size of kernel, germination percentage, variety and location where produced ranked highly in a factor analysis as important to malt barley buyers. While results from the sample of Canadian and US buyers did not indicate strong potential for SCM in the malt barley sector, the study found there to be differences in attributes desired by US versus Canadian malt purchasers. Main differences were the concern of US buyers with the region where the barley was grown, and the apparently much higher willingness of US buyers to obtain their malt barley from more than one source. These differences may suggest a potential for SCM in malt barley focused on procuring supplies from regions identified as preferred locations for barley used in malt production.Industrial Organization,

TRADE POLICY UNDER IMPERFECT COMPETITION: AN ASSESSMENT OF THE TRQ ON LAMB MEAT

The United States imposed a tariff-rate quota (TRQ) on lamb meat in July 1999. Early analysis suggested the possibility that lamb growers could lose welfare via the creation of packer market power. This paper considers how subsequent events modify that analysis. Observed prices suggest reduced pass-through. Lamb prices are unchanged and more stable. Using an annual quota instead of a quarterly quota reduces the opportunity for market conduct switching. Early termination of the TRQ to comply with the WTO rulings magnifies any welfare loss. Assistance payments prevent welfare losses to growers with little impact on the market.International Relations/Trade, Livestock Production/Industries,

DEMAND RELATIONSHIPS AMONG JUICE BEVERAGES: A DIFFERENTIAL DEMAND SYSTEM APPROACH

Nielsen ScanTrack data were used to study how income and prices influenced consumer juice beverage demand in the United States during the period from 1988-89 through 1991-92. Alternative differential demand models combining the features of the Rotterdam model and the almost ideal demand system (AIDS) were tested. Results indicate the CBS type demand responses describe consumer behavior better than the other specifications for this particular data. set.Differential demand systems, Juice beverages, Demand and Price Analysis,