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Institution

Louisiana State University

EducationBaton Rouge, Louisiana, United States
About: Louisiana State University is a education organization based out in Baton Rouge, Louisiana, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 40206 authors who have published 76587 publications receiving 2566076 citations. The organization is also known as: LSU & Louisiana State University and Agricultural and Mechanical College.
Topics: Population, Poison control, Wetland, Autism, Sediment


Papers
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Journal ArticleDOI
TL;DR: In this article, the authors derived explicit expressions for quantum discord for a larger class of two-qubit states, namely, a seven-parameter family of so called X states that have been of interest in a variety of contexts in the field.
Abstract: Quantum discord, a kind of quantum correlation, is defined as the difference between quantum mutual information and classical correlation in a bipartite system. In general, this correlation is different from entanglement, and quantum discord may be nonzero even for certain separable states. Even in the simple case of bipartite quantum systems, this different kind of quantum correlation has interesting and significant applications in quantum information processing. So far, quantum discord has been calculated explicitly only for a rather limited set of two-qubit quantum states and expressions for more general quantum states are not known. In this article, we derive explicit expressions for quantum discord for a larger class of two-qubit states, namely, a seven-parameter family of so called X states that have been of interest in a variety of contexts in the field. We also study the relation between quantum discord, classical correlation, and entanglement for a number of two-qubit states to demonstrate that they are independent measures of correlation with no simple relative ordering between them.

822 citations

Journal ArticleDOI
TL;DR: It is found that belowground resource availability plays an important role in the assembly of tropical tree communities at local scales and provide the basis for future investigations on the mechanisms of resource competition among tropical tree species.
Abstract: The importance of niche vs. neutral assembly mechanisms in structuring tropical tree communities remains an important unsettled question in community ecology [Bell G (2005) Ecology 86:1757-1770]. There is ample evidence that species distributions are determined by soils and habitat factors at landscape ( 0.5 million individual trees of 1,400 species and 10 essential plant nutrients, we used Monte Carlo simulations of species distributions to test plant-soil associations against null expectations based on dispersal assembly. We found that the spatial distributions of 36-51% of tree species at these sites show strong associations to soil nutrient distributions. Neutral dispersal assembly cannot account for these plant-soil associations or the observed niche breadths of these species. These results indicate that belowground resource availability plays an important role in the assembly of tropical tree communities at local scales and provide the basis for future investigations on the mechanisms of resource competition among tropical tree species.

819 citations

Journal ArticleDOI
TL;DR: This work has identified a large family of proteins having 12-22 % similarity with ACPS, which are putative P-pant transferases, and found three of these proteins, E. coli EntD and o195, and subtilis Sfp, have been overproduced, purified and found to have P- pant transferase activity.

816 citations

Book
05 Aug 1998
TL;DR: Algorithms for Parallel Computing: Algebraic Equations and Matrices, Differentiation and Integration, and Tree Algorithms.
Abstract: FOUNDATIONS OF PARALLEL COMPUTING. Elements of Parallel Computing. Data Structures for Parallel Computing. Paradigms for Parallel Algorithm. Simple Algorithms. ALGORITHMS FOR GRAPH MODELS. Tree Algorithms. Graph Algorithms. NC Algorithms for Chordal Graphs. ARRAY MANIPULATION ALGORITHMS. Searching and Merging. Sorting Algorithms. NUMERICAL ALGORITHMS. Algebraic Equations and Matrices. Differentiation and Integration. Differential Equations. Answers to Selected Exercises. Index.

816 citations

Journal ArticleDOI
01 Dec 2010-Ecology
TL;DR: A trade-off between growth and mortality rates characterizes tree species in closed canopy forests and a growing consensus that seed mass, leaf mass per area, wood density, and maximum height are key traits among forest trees is agreed.
Abstract: A trade-off between growth and mortality rates characterizes tree species in closed canopy forests. This trade-off is maintained by inherent differences among species and spatial variation in light availability caused by canopy-opening disturbances. We evaluated conditions under which the trade-off is expressed and relationships with four key functional traits for 103 tree species from Barro Colorado Island, Panama. The trade-off is strongest for saplings for growth rates of the fastest growing individuals and mortality rates of the slowest growing individuals (r 2 ¼ 0.69), intermediate for saplings for average growth rates and overall mortality rates (r 2 ¼ 0.46), and much weaker for large trees (r 2 � 0.10). This parallels likely levels of spatial variation in light availability, which is greatest for fast- vs. slow-growing saplings and least for large trees with foliage in the forest canopy. Inherent attributes of species contributing to the trade-off include abilities to disperse, acquire resources, grow rapidly, and tolerate shade and other stresses. There is growing interest in the possibility that functional traits might provide insight into such ecological differences and a growing consensus that seed mass (SM), leaf mass per area (LMA), wood density (WD), and maximum height (Hmax) are key traits among forest trees. Seed mass, LMA, WD, and Hmax are predicted to be small for light-demanding species with rapid growth and mortality and large for shade-tolerant species with slow growth and mortality. Six of these trait-demographic rate predictions were realized for saplings; however, with the exception of WD, the relationships were weak (r 2 , 0.1 for three and r 2 , 0.2 for five of the six remaining relationships). The four traits together explained 43-44% of interspecific variation in species positions on the growth-mortality trade-off; however, WD alone accounted for .80% of the explained variation and, after WD was included, LMA and Hmax made insignificant contributions. Virtually the full range of values of SM, LMA, and Hmax occurred at all positions on the growth-mortality trade-off. Although WD provides a promising start, a successful trait- based ecology of tropical forest trees will require consideration of additional traits.

813 citations


Authors

Showing all 40485 results

NameH-indexPapersCitations
H. S. Chen1792401178529
John A. Rogers1771341127390
Omar M. Yaghi165459163918
Barry M. Popkin15775190453
John E. Morley154137797021
Claude Bouchard1531076115307
Ruth J. F. Loos14264792485
Ali Khademhosseini14088776430
Shanhui Fan139129282487
Joseph E. LeDoux13947891500
Christopher T. Walsh13981974314
Kenneth A. Dodge13846879640
Steven B. Heymsfield13267977220
George A. Bray131896100975
Zhanhu Guo12888653378
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202362
2022608
20213,042
20203,095
20192,874
20182,762