Letter, n.d., from John Herndon Mercer to Eva Jessye

2 pages, Mercer was the President of the Songwriters Hall of Fame. The bottom fourth of the paper was cut out, so half of the message is missing. There is a photograph of Mercer attached

Consolidated fuel reprossing program: The implications of force reflection for teleoperation in space

Previous research on teleoperator force feedback is reviewed and results of a testing program which assessed the impact of force reflection on teleoperator task performance are reported. Force relection is a type of force feedback in which the forces acting on the remote portion of the teleoperator are displayed to the operator by back-driving the master controller. The testing program compared three force reflection levels: 4 to 1 (four units of force on the slave produce one unit of force at the master controller), 1 to 1, and infinity to 1 (no force reflection). Time required to complete tasks, rate of occurrence of errors, the maximum force applied to tasks components, and variability in forces applied to components during completion of representative remote handling tasks were used as dependent variables. Operators exhibited lower error rates, lower peak forces, and more consistent application of forces using force relection than they did without it. These data support the hypothesis that force reflection provides useful information for teleoperator users. The earlier literature and the results of the experiment are discussed in terms of their implications for space based teleoperator systems. The discussion described the impact of force reflection on task completion performance and task strategies, as suggested by the literature. It is important to understand the trade-offs involved in using telerobotic systems with and without force reflection

Letter, John M. Herndon to Peleg Clarke Jr., January 27, 1868

This handwritten letter, dated January 27, 1868, is from John M. Herndon to Peleg Clarke Jr. responding to Clarke\u27s recent letter inquiring about laws the sale of land deeds in Virginia. The letter goes on to discuss personal matters between the men.https://scholarsjunction.msstate.edu/fvw-manuscripts-clarke/1064/thumbnail.jp

Bootstrap Percolation in the Random Geometric Graph

Bootstrap percolation on a graph is a process which models the spread of an infection given an initially infected set of vertices of the graph. To state the problem more precisely, suppose G is a graph, k is a natural number, and I_0 is a set of initially infected vertices. Then for any discrete time t, we define I_t to be I_{t-1} along with any vertex outside of I_{t-1} which has at least k edges to vertices of I_{t-1}. This type of process may be used to model the spread of a disease by taking people as vertices, interactions between people as edges, and assuming a rate at which the infection spreads. That is, if the rate of spread is 10%, we would expect that if a person is in contact with 10 infected people, then the person will become infected. Other applications of this type of model involve the spread of rumors and the fault tolerance for distributed computing. The random geometric graph is formed by fixing an r value and choosing n points from the unit square uniformly at random. We then join a pair of these points by an edge if their distance is less than r. This kind of random graph seems particularly relevant in the current socially distant world in which people attempt to only interact with others when necessary (i.e. distance-based edges roughly model this kind of relative isolation). Random geometric graphs have been well-studied. Bootstrap percolation on random geometric graphs has been examined although prior results in this direction cover limited regimes of the parameters. In our project, we extend previous work to study other ranges of values of the parameters. Along the way we use similar ideas to identify the threshold for connectivity in the random geometric graph which is a problem of independent interest.https://digitalcommons.winthrop.edu/sureposters/1000/thumbnail.jp

The impact of feed cost on U.S. poultry production: implications for the impact of increased ethanol production

Crop Production/Industries, Livestock Production/Industries,