The DLESE Community Review System: Gathering, Aggregating, and Disseminating User Feedback about the Effectiveness of Web-based Educational Resources

NOTE: This is a large file, 8 mb in size! The Community Review System (CRS) of the Digital Library for Earth System Education (DLESE) is intended to help educators seeking high-quality digital resources and resource creators who are seeking recognition for their resources. This article describes how CRS gathers web-based feedback from educators and learners who have used DLESE educational resources, plus specialist reviews by science and pedagogy experts. This information is used to identify exemplary resources to be showcased in the DLESE Reviewed Collection. Detailed, but anonymous, feedback is provided to the resource creator to encourage improvement of the resource. Educational levels: Graduate or professional, Graduate or professional

Development and Evaluation of "Where Are We?" Map-Skills Software and Curriculum

The "Where are We?" software and lessons are designed to help children in grades two through four learn to "translate" between the visually-perceived world that they sense around them, and the schematic representation of that landscape on a map. Field-based tests were developed to examine students' ability to absorb information in the real world and to transfer it onto a map and, conversely, the ability to absorb information from a map and transfer it into an action in the real world. Formative evaluation of a prototype version of "Where are We?" resulted in the following improvements in the instructional materials: more and prompter feedback for students, additional assessment tools for teachers, development of lessons to model successful map-using strategies, development of lessons to overcome common misconceptions, and replacement of text-based instructions with a voiceover demo. Educational levels: Graduate or professional

NON-PARAMETRIC AND SEMI-PARAMETRIC TECHNIQUES FOR MODELING AND SIMULATING CORRELATED, NON-NORMAL PRICE AND YIELD DISTRIBUTIONS: APPLICATIONS TO RISK ANALYSIS IN KANSAS AGRICULTURE

Parametric, non-parametric, and semi-parametric approaches are commonly used for modeling correlated distributions. Semi-parametric and non-parametric approaches are used to examine the risk situation for Kansas agriculture. Results from the model indicate that 2000 will be another difficult year for Kansas farmers, although crop income will increase slightly from 1999. However, unless another supplemental infusion of government payments occurs, crop income is expected to be the lowest since 1992.correlated distributions, non-parametric modeling, semi-parametric modeling, Kansas agriculture, Research Methods/ Statistical Methods,

How Much Do Starting Values Really Matter? An Empirical Comparison of Genetic Algorithm and Traditional Approaches

This research evaluates the impact of using different starting conditions in estimating meat demand systems. Results suggest that as the econometric task becomes increasingly nonlinear, specification of starting conditions becomes increasingly important. This work demonstrates implications of failing to use the best available starting value conditions and how these implications vary with the complexity of the underlying econometric model of interest. Furthermore, this piece proposes a universal approach to be used by all applied econometric practioners to developing appropriate starting values for use in subsequent model estimation.Demand and Price Analysis,

POST-HARVEST GRAIN STORING AND HEDGING WITH EFFICIENT FUTURES

This study simulates whether Kansas wheat, soybean, corn, and milo producers could have profitably used deferred futures plus historical basis cash price expectations for post-harvest unhedged and hedged grain storage decisions from 1985-97. The signaled storage decision is compared to a representative Kansas producer whose crop sales mimic average Kansas marketings each year. Using 23 grain price locations, the simulations resulted in an 11 cents per bushel annual increase in grain storage profits for wheat, 27 cents for soybeans, -17 cents for corn, and –20 cents for milo; however, storage profit differences varied substantially across locations. Hedging tended to decrease risk, but not impact profitability.Agribusiness,

CATTLE FEEDER BEHAVIOR AND FEEDER CATTLE PLACEMENTS

Cattle feeders appear irrational when they place cattle on feed when projected profit is negative. Long futures positions appear to offer superior returns to cattle feeding investment. Cattle feeder behavior suggests that they believe a downward bias in live cattle futures persists and that cattle feeders use different expectations than the live cattle futures market price when making placement decisions. This study examines feeder cattle placement determinants, comparing performance of expected hedgeable profit with past actual profit in explaining feeder cattle placements. Past actual profit is a more important placement determinant than expected profit based upon the live cattle futures market, even though hedgeable profit provides a superior forecast of future profit. In addition, potential deterrents to cattle feeders'Â’ use of futures as a substitute for cattle ownership are discussed.Livestock Production/Industries,

Expectations of Cattle Feeding Investors in Feeder Cattle Placements

Cattle feeders appear irrational when they place cattle on feed when projected profits are negative. Long futures positions appear to offer superior returns to cattle feeding investment. Cattle feeder behavior suggests that they believe a downward bias in live cattle futures persists and that cattle feeders use different information than the live cattle futures market price when making placement decisions. This paper examines feeder cattle placement determinants and compares performance of expected hedgeable profits with past actual profits in explaining feeder cattle' placements. Past actual profits are found to be more important placement determinants than expected profits based upon the live cattle futures market, even though hedgeable profits provide superior forecasts of future profits.Livestock Production/Industries,

AN ECONOMIC ANALYSIS OF THE DAIRY ENVIRONMENTAL COOPERATIVE IN NORTHEAST KANSAS

In 1997, the Black Vermillion Dairy Environmental Cooperative (DEC) was started with an EPA 319A grant. Ten Kansas dairies located in the Kansas Black Vermillion Watershed were studied to evaluate the on-farm manure structures cost-shared by the DEC. Net present value (NPV) analysis was used to evaluate the profitability associated with the manure structures. The NPV analysis showed that in most cases, investing in a manure storage structure is a worthwhile venture and can be profitable for the dairy. However, cost-share assistance often will be needed in order to have positive pre-tax and after-tax NPVs.Dairy Environmental Cooperative (DEC), manure management, Net Present Value (NPV) analysis, cost-share, concrete manure storage, Environmental Economics and Policy,

PREDICTING FEEDING COST OF GAIN WITH MORE PRECISION

Costs during the feeding period, commonly summarized as "feeding cost of gain", are primary determinants of cattle feeding profits. This study provides a method of generalizing information available at placement time into a suitable feeding cost of gain prediction, so that feeders and ranchers can make more informed placement decisions.Cattle-Feeding, Feeding-Cost-Of-Gain, Industrial Organization, Livestock Production/Industries,