Students in Transition: The Library Of Congress Classification System as Initiation

See presentation description

Evaluation of a Continuous Progress Program in Mathematics - Carl Sandburg School

No abstract provided by author

The Search for UFO\u27s (User Friendly Organizations)

Russ Holloman is the Maxwell Professor of Organization Behavior in the School of Business Administration, Augusta College, Augusta, Georgia. June B. Kelly is Director, Middle Georgia RESA, Ft. Valley, Georgia

Residual thermal stress control in composite reinforced metal structures

Advanced composite materials, composed of boron or graphite fibers and a supporting matrix, make significant structural efficiency improvements available to aircraft and aerospace designers. Residual stress induced during bonding of composite reinforcement to metal structural elements can be reduced or eliminated through suitable modification to the manufacturing processes. The most successful method employed during this program used a steel tool capable of mechanically loading the metal component in compression prior to the adhesive bonding cycle. Compression loading combined with heating to 350 F during the bond cycle can result in creep deformation in aluminum components. The magnitude of the deformation increases with increasing stress level during exposure to 350 F

Mobile sediments in a karst aquifer

In karst aquifers, mobile sediments may play a fundamental role in determining water quality by concentrating and transporting contaminants. This study investigates spatial characteristics of sediment in a karst aquifer, examines temporal characteristics of sediment discharging from a karst spring, and describes a new method for tracing sediment in karst terrane. Sediment samples were collected from different compartments of a karst aquifer (the Edwards Aquifer, Central Texas) and analyzed for mineralogy, grainsize distribution, organic carbon content, and specific surface area. Suspended sediment samples discharging from a karst spring in response to two storms were analyzed for mineralogy and grainsize distribution. To test the hypothesis that allochthonous sediment can move through karst systems, a sediment tracer--montmorillonite clay homoionized to the lanthanide form--was developed. Statistical analysis of sediment characteristics separated the sampling sites into three groups: 1) streambeds, sinkholes, and small springs; 2) wells; and 3) caves. Characteristics of sediments from Barton Springs (the main spring in the region) showed a mixture of the characteristics of these three groups. The mineralogic signature of sediments discharging from Barton Springs in response to storms was initially allochthonous and then became more autochthonous. Temporal changes in aqueous chemistry of Barton Springs varied in response to rainfall, seasonal changes in aquifer level, and draining of the pool over the spring. The results indicate that some sediments, containing calcite and a high organic carbon content, are allochthonous, and others, containing dolomite and a low organic carbon content, are autochthonous. Sediments issuing from Barton Springs contain a mix of both allochthonous and autochthonous sediments. Based on geochemical characteristics, allochthonous sediments have a greater potential to sorb and transport contaminants than do autochthonous sediments. Development and testing of the sediment tracer verified that allochthonous sediments can be transported through karst. Sediments, particularly allochthonous sediments, can play a crucial role in contaminant transport in karst; the volume of these sediments will increase with increasing urbanization. Because those sediment characteristics which determine contaminant transport potential vary both spatially and temporally, determination of sediment volume and type is critical to evaluating its impact on water quality.Geological Science

An Observational Cohort Study Evaluating Antimicrobial Use in Peripartum Sepsis : A Tendency towards Overdiagnosis?

Funding: This research received no external funding. This study was sponsored by the University of Strathclyde. Nouf Abutheraa received a financial scholarship from the government of the Kingdom of Saudi Arabia as part of her PhD studentship. The funding source had no involvement or influence on study design, data collection, analysis and interpretation or writing the report. Acknowledgments: The authors thank the healthcare staff who provided general support throughout the study.Peer reviewedPublisher PD

Computing the metric dimension of truncated wheels

For an ordered subset W = {w1, w2, w3, . . . , wk} of vertices in a connected graph G and a vertex v of G, the metric representation of v with respect to W is the k-vector r(v|W) = (d(v, w1), d(v, w2), d(v, w3), . . . , d(v, wk)). The set W is called a resolving set of G if r(u|W) = r(v|W) implies u = v. The metric dimension of G, denoted by β(G), is the minimum cardinality of a resolving set of G. Let n ≥ 3 be an integer. A truncated wheel, denoted by TWn, is the graph with vertex set V (TWn) = {a} ∪ B ∪ C, where B = {bi : 1 ≤ i ≤ n} and C = {cj,k : 1 ≤ j ≤ n, 1 ≤ k ≤ 2}, and edge set E(TWn) = {abi : 1 ≤ i ≤ n} ∪ {bici,k : 1 ≤ i ≤ n, 1 ≤ k ≤ 2} ∪ {cj,1cj,2 : 1 ≤ j ≤ n} ∪ {cj,2cj+1,1 : 1 ≤ j ≤ n}, where cn+1,1 = c1,1. In this paper, we compute the metric dimension of truncated wheels