Identifying multiple detachment horizons and an evolving thrust history through cross-section restoration and appraisal in the Moine Thrust Belt, NW Scotland

Peer reviewedPublisher PD

Summary of State Forest Nursery Operation in the United States.

The increasing interest in reforestation work throughout the States has resulted in the establishment of a number of State Forest Nurseries. In order to carry on an extensive reforestation project it has been found that more rapid progress may be made by securing quantity production at a low cost through the maintenance of State nurseries. Most timber planters realize that it is necessary to keep the initial cost of planting operations down to a minimum in case the planting investment is to show satisfactory returns. This means that trees must be supplied at a very small cost per acre or extensive reforestation will not be attempted

The fish fauna of the Iwokrama Forest

Fishes were collected from the rivers in and around the Iwokrama Forest during January-February and November-December 1997. Four hundred species of fish were recorded from forty families in ten orders. Many of these fishes are newly recorded from Guyana and several are thought to be endemic. The number of species recorded for the area is surprising given the low level of effort and suggests that this area may be particularly important from a fish diversity perspective. This paper focuses on species of particular interest from a management perspective including those considered economically important, rare or endangered. The paper is also the basis for developing fisheries management systems in the Iwokrama Forest and Rupununi Wetlands

Influence of structural position on fracture networks in the Torridon Group, Achnashellach fold and thrust belt, NW Scotland

Acknowledgements This research is funded by a NERC CASE studentship (NERC code NE/I018166/1) in partnership with Midland Valley. The authors thank Midland Valley for use of FieldMove Clino software for fracture data collection, and Move software for cross section construction, and strain modelling. 3D Field software is acknowledged for contour map creation. We also thank Toru Takeshita for overseeing the editorial process, and Catherine Hanks and Ole Petter Wennberg for constructive reviews.Peer reviewedPublisher PD

Postcard: Watching the Races, Kansas State Fair

This black and white photographic postcard features the horse races at the Kansas State Fair. People line the fences watching the horses and drivers on carts race on the track. Buildings are in the background. Tents are in the foreground. Written text is in the center of the card. Handwriting is on the back of the card.https://scholars.fhsu.edu/tj_postcards/1461/thumbnail.jp

Distinguishability of infinite groups and graphs

The distinguishing number of a group G acting faithfully on a set V is the least number of colors needed to color the elements of V so that no non-identity element of the group preserves the coloring. The distinguishing number of a graph is the distinguishing number of its automorphism group acting on its vertex set. A connected graph Gamma is said to have connectivity 1 if there exists a vertex alpha \in V\Gamma such that Gamma \setminus \{\alpha\} is not connected. For alpha \in V, an orbit of the point stabilizer G_\alpha is called a suborbit of G. We prove that every nonnull, primitive graph with infinite diameter and countably many vertices has distinguishing number 2. Consequently, any nonnull, infinite, primitive, locally finite graph is 2-distinguishable; so, too, is any infinite primitive permutation group with finite suborbits. We also show that all denumerable vertex-transitive graphs of connectivity 1 and all Cartesian products of connected denumerable graphs of infinite diameter have distinguishing number 2. All of our results follow directly from a versatile lemma which we call The Distinct Spheres Lemma

Reproducible aspects of the climate of space weather over the last five solar cycles

Each solar maximum interval has a different duration and peak activity level which is reflected in the behaviour of key physical variables that characterize solar and solar wind driving and magnetospheric response. The variation in the statistical distributions of the F10.7 index of solar coronal radio emissions, the dynamic pressure PDyn and effective convection electric field Ey in the solar wind observed in situ upstream of Earth, the ring current index DST, and the high latitude auroral activity index AE, are tracked across the last five solar maxima. For each physical variable we find that the distribution tail (the exceedences above a threshold) can be rescaled onto a single master distribution using the mean and variance specific to each solar maximum interval. We provide Generalized Pareto Distribution fits to the different master distributions for each of the variables. If the mean and variance of the large‐to extreme observations can be predicted for a given solar maximum then their full distribution is known

Using laterally compatible cross sections to infer fault growth and linkage models in foreland thrust belts

This research is partially funded by a CGG-financed pathfinder project, and formed part of a study by the Fold-Thrust Research Group at the University of Aberdeen, co-funded by InterOil, Oil Search and Santos. We also thank Nicolas Bellahsen and Stefano Tavani for constructive reviews.Peer reviewedPublisher PD

Fatigue Testing of a Composite Propeller Blade using Fiber-Optic Strain Sensors

The performance of surface-mounted extrinsic Fabry-Perot interferometric (EFPI) sensors during a seventeen-million-cycle, high-strain fatigue test is reported. Fiber-optic strain measurements did not degrade during the test. The sensors were applied to a composite propeller blade subject to a constant axial load and a cyclic bending load. Strain measurements were taken at four blade locations using two types of EFPI sensors and co-located electrical resistance strain gages. Static and dynamic strain measurements were taken daily during the 65 days of this standard propeller-blade test. All fiber-optic sensors survived the fatigue test while most of the resistive gages failed. The suitability of fiber-optic monitoring for fatigue testing and other high-cycle monitoring is demonstrated