Department of Civil and Environmental Engineering
https://udspace.udel.edu/handle/19716/1348
2021-06-24T21:02:12ZEffect of Rail Section and Traffic on Rail Fatigue Life
https://udspace.udel.edu/handle/19716/28939
Effect of Rail Section and Traffic on Rail Fatigue Life
Zarembski, Allan M.
Author's manuscript
1979-03-01T00:00:00ZRail Rollover-The State of the Art
https://udspace.udel.edu/handle/19716/28938
Rail Rollover-The State of the Art
Zarembski, Allan M.
This report presents a survey and description of work performed in the area
of rail overturning. It includes analytical work, as well as test results~ both field
and laboratory. Comparisons between difficult tests and their results are made.
The various causes and related phenomena are discussed, together with suggested
techniques for dealing with this problem.
Publisher's PDF
1977-01-01T00:00:00ZDouble-Mass Curves
https://udspace.udel.edu/handle/19716/1592
Double-Mass Curves
Searcy, James K.; Hardison, Clayton H.
The double- mass curve is used to check the consistency of many kinds of hydrologic data by comparing date for a single station with that of a pattern composed of the data from several other stations in the area. The double-mass curve can be used to adjust inconsistent precipitation data. The graph of the cumulative data of one variable versus the cumulative data of a related variable is a straight line so long as the relation between the variables is a fixed ratio. Breaks in the double-mass curve of such variables are caused by changes in the relation between the variables. These changes may be due to changes in the method of data collection or to physical changes that affect the relation.
Applications of the double-mass curve to precipitation, streamflow, and sediment data, and to precipitation-runoff relations are described . A statistical test for significance of an apparent break in the slope of the double-mass curve is described by an example. Poor correlation between the variables can prevent detection of inconsistencies in a record, but an increase in the length of record tends to offset the effect of poor correlation. The residual-mass, curve which is a modification of the double-mass curve, magnifies imperceptible breaks in the double-mass curve for detailed study. Of the several methods of fitting a smooth curve to cyclic or periodic data, the moving-are method and the double-integration method deserve greater, use in hydrology. Both methods are described in the manual. The moving-arc method has general applicability, and the double integration methods is useful in fitting a curve to cycles of sinusoidal form.
1960-01-01T00:00:00ZBiological Implication of Metals in the Environment
https://udspace.udel.edu/handle/19716/1591
Biological Implication of Metals in the Environment
Drucker, Harvey
Proceedings of the Fifteenth Annual Hanford Life Sciences Symposium at Richland, Washington, September 29-October 1, 1975.
1977-01-01T00:00:00Z