Allegheny Mountain Section Research Articles

Physiographic and Anthropogenic Factors Influencing Fish Community Composition in Tributaries to the Youghiogheny River in Pennsylvania

Abstract We evaluated the status of fish communities from 30 first- to fourth-order wadeable Youghiogheny River (YR) tributaries located in the Allegheny Mountain Section (AMS) and Pittsburgh Low Plateau (PLP) physiographic provinces in Pennsylvania. The AMS is underlain primarily by geologic formations dominated by the Allegheny Group, while the Casselman Formation underlies much of the PLP. Streams draining the AMS were primarily forested, low-order (1–2), high-gradient, and poorly-buffered with minimal cultural influences. By contrast, the majority of the PLP was drained by low-gradient, well-buffered, valley streams of order ≥2, with varying anthropogenic influences. In order to characterize connectivity, all streams were sampled from their mainstream junctions to an endpoint 200 m upstream utilizing back-pack electrofishing. A total of 366 fishes representing seven families, 17 genera, and 22 species were collected from AMS streams, while the PLP yielded 2738 fishes representing 8 families, 25 genera...

Christiaan Huygens and the Problem of the Hanging Chain

John Bukowski (bukowski@juniata.edu) is Associate Professor and Chair of the Department of Mathematics at Juniata College in Huntingdon, Pennsylvania. He received B.S. degrees in mathematics and physics from Carnegie Mellon University and his Ph.D. in applied mathematics from Brown University. He currently serves as Governor of the Allegheny Mountain Section of the MAA. He was a 1998–1999 Project NExT Fellow (silver dot) and is now Co-Coordinator of his Section NExT program. He finds time to do mathematics when he is not busy as College Organist, choir accompanist, church organist, or piano soloist. One of his accomplishments at Juniata is his performance of a Mozart piano concerto in 2006. He and his wife Cathy Stenson (also a mathematician) have two sons, David and Daniel, who like to ask them mathematical questions.

Mathematical Education: A Case for Balance

Click to increase image sizeClick to decrease image size Additional informationNotes on contributorsGeorge E. AndrewsGeorge Andrews received his BS and MA degrees from Oregon State University in 1960, and his Ph.D. in 1964 from the University of Pennsylvania. He joined the Pennsylvania State University and in 1981 became an Evan Pugh Professor. He has been a visiting faculty member at colleges and universities on four continents. He has published extensively on partitions and related areas of mathematics and is often a featured lecturer at professional meetings. In 1993 he received the MAA Distinguished Teaching Award for the Allegheny Mountain Section.

Recession characteristics of groundwater outflow and base flow from mountainous watersheds

The relationship between base flow recession characteristics in steep watersheds and geomorphologic and soil parameters is investigated. The formulation for the groundwater outflow was obtained by means of a hydraulic approach applied to a simple conceptual model for a hillslope. Long‐term flow data of 19 representative basins in the Allegheny Mountain section of the Appalachian Plateaus were analyzed on the basis of this formulation. Results showed that the reaction factor, which is a time scale of base flow recession, is dependent on the mean land slope, the drainage density, and the ratio (K/f) of the hydraulic conductivity and the drainable porosity. On account mainly of the nonuniform distribution of the physical characteristics within a basin, the reaction factor for a given watershed is somewhat variable with time, but the adoption of a constant value is useful to represent average conditions for a recession period. Analysis of the (K/f) dependency showed that macropores and other structural features may greatly affect the watershed base flow. Evaporation from groundwater appears to constitute only a minor portion of overall basin evaporation.

April Meeting of the Allegheny Mountain Section

"April Meeting of the Allegheny Mountain Section." The American Mathematical Monthly, 84(9), pp. 759–760

Can This Polynomial Be Factored?

Harold L. Dorwart has taught at Williams College, Washington and Jefferson College, and Trinity College (where he was Seabury professor of mathematics and department chairman (,&UP It 1949-67, dean of the college 1967-68, and is now professor emeritus). He has contributed numerous articles to professional journals and is the author of "The Geometry of Incidence" (1966), and "Configurations" (1967). He received his Ph.D. degree in mathematics from Yale University in 1931, has been a member of the Board of Governors of the Mathematical Association of America, secretary of the Allegheny Mountain Section, and chairman of the Northeastern Section.

April Meeting of the Allegheny Mountain Section

April Meeting of the Allegheny Mountain Section

April Meeting of the Allegheny Mountain Section

"April Meeting of the Allegheny Mountain Section." The American Mathematical Monthly, 82(10), p. 1042

May Meeting of the Allegheny Mountain Section

May Meeting of the Allegheny Mountain Section

May Meeting of the Allegheny Mountain Section

"May Meeting of the Allegheny Mountain Section." The American Mathematical Monthly, 80(9), pp. 1094–1095

May Meeting of the Allegheny Mountain Section

"May Meeting of the Allegheny Mountain Section." The American Mathematical Monthly, 79(10), pp. 1165–1166

May Meeting of the Allegheny Mountain Section

May Meeting of the Allegheny Mountain Section

May Meeting of the Allegheny Mountain Section

(1973). May Meeting of the Allegheny Mountain Section. The American Mathematical Monthly: Vol. 80, No. 9, pp. 1094-1095.

April Meeting of the Allegheny Mountain Section

April Meeting of the Allegheny Mountain Section

April Meeting of the Allegheny Mountain Section

April Meeting of the Allegheny Mountain Section

May Meeting of the Allegheny Mountain Section

"May Meeting of the Allegheny Mountain Section." The American Mathematical Monthly, 72(8), pp. 940–941

May Meeting of the Allegheny Mountain Section

May Meeting of the Allegheny Mountain Section

May Meeting of the Allegheny Mountain Section

(1963). May Meeting of the Allegheny Mountain Section. The American Mathematical Monthly: Vol. 70, No. 8, pp. 921-921.

The May Meeting of the Allegheny Mountain Section

The May Meeting of the Allegheny Mountain Section

The May Meeting of the Allegheny Mountain Section

"The May Meeting of the Allegheny Mountain Section." The American Mathematical Monthly, 68(7), pp. 707–708