Works Published in 2009

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Displaying works 121 - 140 of 175 in total

Sorted by most recent date added to the index first, which may not be the same as publication date order.

2009 journal article

A smoothing technique for discrete delta functions with application to immersed boundary method in moving boundary simulations

JOURNAL OF COMPUTATIONAL PHYSICS, 228(20), 7821–7836.

author keywords: Immersed boundary method; Moving boundary; Non-physical force oscillations; Smoothed discrete delta function
TL;DR: It has been shown that the smoothed discrete delta functions constructed in this paper have one-order higher derivative than the regular ones, which can effectively suppress the non-physical oscillations in the volume forces and improve the accuracy of the immersed boundary method with direct forcing in moving boundary simulations. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2009 journal article

A discrete-time queueing network model of a hub-based OBS architecture

TELECOMMUNICATION SYSTEMS, 41(3), 173–184.

By: X. Mountrouidou* & H. Perros n

author keywords: Optical Burst Switching; Hub; Queueing network; Burst aggregation; Decomposition algorithm
TL;DR: A novel discrete-time queueing network model of a zero loss hub-based Optical Burst Switched architecture, consisting of multiple input edge nodes and one destination edge node, which provides a tight upper bound as shown by comparing the analytical data to simulation results. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2009 journal article

Some additive results on Drazin inverses

Applied Mathematics and Computation, 215(2), 530–538.

TL;DR: Some additive results on Drazin inverse of a sum of Dazin invertible elements are derived and some converse results are presented. (via Semantic Scholar)
Source: NC State University Libraries
Added: August 6, 2018

2009 article

On the existence of symmetric chain decompositions in a quotient of the Boolean lattice

Jiang, Z., & Savage, C. D. (2009, September 6). DISCRETE MATHEMATICS, Vol. 309, pp. 5278–5283.

By: Z. Jiang* & C. Savage*

author keywords: Symmetric chain decompositions; Necklaces; Quotients of the Boolean lattice
TL;DR: In this note it is described how it suffices to focus on subposets induced by necklaces with periodic block codes, substantially reducing the size of the problem. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2009 journal article

OPTIMAL STOPPING PROBLEM FOR STOCHASTIC DIFFERENTIAL EQUATIONS WITH RANDOM COEFFICIENTS

SIAM JOURNAL ON CONTROL AND OPTIMIZATION, 48(2), 941–971.

By: M. Chang, T. Pang* & J. Yong

author keywords: optimal stopping; random coefficients; dynamic programming principle; backward stochastic partial differential variational inequality; verification theorem
TL;DR: An optimal stopping problem for stochastic differential equations with random coefficients with Hamiltion-Jacobi-Bellman equation is considered, and well-posedness of such a BSPDVI is established, and a verification theorem is proved. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2009 journal article

LAGRANGE MULTIPLIER APPROACH WITH OPTIMIZED FINITE DIFFERENCE STENCILS FOR PRICING AMERICAN OPTIONS UNDER STOCHASTIC VOLATILITY

SIAM JOURNAL ON SCIENTIFIC COMPUTING, 31(4), 2646–2664.

author keywords: American option pricing; stochastic volatility model; linear complementarity problem; finite difference method; quadratic programming; multigrid method; Lagrange method; penalty method
TL;DR: The deterministic numerical valuation of American options under Heston's stochastic volatility model is considered and a Lagrange approach is used to treat the linear complementarity problems. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2009 journal article

Edge-Reconfigurable Optical Networks (ERONs): Rationale, Network Design, and Evaluation

JOURNAL OF LIGHTWAVE TECHNOLOGY, 27(12), 1837–1845.

By: G. Karmous-Edwards n, A. Vishwanath n, D. Reeves n, L. Battestilli n, P. Vegesna n & G. Rouskas n

Contributors: L. Battestilli n, G. Karmous-Edwards n, D. Reeves n, G. Rouskas n, P. Vegesna n & A. Vishwanath n

author keywords: Dynamic circuits; network design; optical networks
TL;DR: An algorithm for creating an ERON from an existing topology of static lightpaths is developed, and simulation results that quantify the benefits of ERONs, in terms of the number of light Paths that are needed when compared to a static configuration of independent and dedicated circuits are presented. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2009 journal article

Economic analysis of US textile production activities under the North American Free Trade Agreement

JOURNAL OF THE TEXTILE INSTITUTE, 100(7), 612–625.

By: M. Lim*, M. Suh n & L. Gaskill*

author keywords: economic analysis; NAFTA; textile production; normalized restricted translog profit model
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2009 article

An update on the middle levels problem

Shields, I., Shields, B. J., & Savage, C. D. (2009, September 6). DISCRETE MATHEMATICS, Vol. 309, pp. 5271–5277.

By: I. Shields*, B. Shields* & C. Savage n

author keywords: Hamilton cycles; Middle levels; Boolean lattice; Necklaces
TL;DR: The result was achieved by an algorithmic improvement that made it possible to find a Hamilton path in a reduced graph having 129,644,790 vertices, using a 64-bit personal computer. (via Semantic Scholar)
UN Sustainable Development Goal Categories
4. Quality Education (Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2009 journal article

Probabilistic Cost-Effectiveness Comparison of Screening Strategies for Colorectal Cancer

ACM TRANSACTIONS ON MODELING AND COMPUTER SIMULATION, 19(2).

By: A. Tafazzoli n, S. Roberts n, R. Klein*, R. Ness* & R. Dittus*

author keywords: Cost-effectiveness analysis; probabilistic sensitivity analysis; net benefit analysis; acceptability curves; colorectal cancer screening strategies; medical decision making
TL;DR: Methodologically, this work demonstrates how variability from the natural variation in the development, screening, and treatment of a disease can be combined with the variation in parameter uncertainty to produce a probabilistic cost-effectiveness analysis of decision alternatives. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2009 journal article

On the shape derivative for problems of Bernoulli type

Interfaces and Free Boundaries, 11(2), 317–330.

By: J. Haslinger*, K. Ito*, T. Kozubek n, K. Kunisch* & G. Peichl*

Source: NC State University Libraries
Added: August 6, 2018

2009 journal article

Coupling winds to ocean surface currents over the global ocean

OCEAN MODELLING, 29(4), 261–268.

author keywords: Wind-Current Coupled System; HYCOM; Wind stress; Heat flux; Ocean surface boundary layer; ESMF; Ocean current
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
14. Life Below Water (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2009 journal article

Topology Stability Analysis and Its Application in Hierarchical Mobile Ad Hoc Networks

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, 58(3), 1546–1560.

By: Y. Xu n & W. Wang n

author keywords: Clustering; hierarchical architecture; mobility network topology; wireless ad hoc networks
TL;DR: A clustering algorithm and a hierarchical routing protocol are proposed that work together to achieve the maximum network stability and the fundamental understanding of the bounds on network stability is provided. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2009 journal article

Strategic purchasing, supply management practices and buyer performance improvement: an empirical study of UK manufacturing organisations

INTERNATIONAL JOURNAL OF PRODUCTION RESEARCH, 47(10), 2649–2667.

By: B. Lawson n, P. Cousins n, R. Handfield n & K. Petersen n

Contributors: B. Lawson n, P. Cousins n, R. Handfield n & K. Petersen n

author keywords: buyer-supplier relationships; strategic purchasing; supply management; structural equation modelling
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2009 article

SPECIAL ISSUE ON ACCURATE SOLUTION OF EIGENVALUE PROBLEMS

SIAM JOURNAL ON MATRIX ANALYSIS AND APPLICATIONS, Vol. 31, pp. VII-VII.

By: I. Ipsen*

Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2009 article

REFINED PERTURBATION BOUNDS FOR EIGENVALUES OF HERMITIAN AND NON-HERMITIAN MATRICES

SIAM JOURNAL ON MATRIX ANALYSIS AND APPLICATIONS, Vol. 31, pp. 40–53.

By: I. Ipsen* & B. Nadler

Contributors: I. Ipsen* & B. Nadler

author keywords: eigenvalues; Hermitian matrix; eigenvalue gap; perturbation bounds; non-Hermitian perturbations; principal components; numerical continuation
TL;DR: Eigenvalue bounds for perturbations of Hermitian matrices are presented and the change in eigenvalues are expressed in terms of a projection of the perturbation onto a particular eigenspace, rather than in terms. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2009 journal article

More efficient optimization of long-term water supply portfolios

WATER RESOURCES RESEARCH, 45.

By: B. Kirsch*, G. Characklis*, K. Dillard* & C. Kelley n

TL;DR: This work describes the integration of a variance reduction technique (control variate method) within the simulation/optimization as a means of more efficiently identifying minimum cost portfolios. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2009 journal article

A well-conditioned augmented system for solving Navier-Stokes equations in irregular domains

JOURNAL OF COMPUTATIONAL PHYSICS, 228(7), 2616–2628.

By: K. Ito n, M. Lai* & Z. Li n

author keywords: Navier-Stokes equations; Embedding technique; Immersed interface method; Irregular domain; Augmented system; Projection method; Level set representation
TL;DR: An augmented method based on a Cartesian grid is proposed for the incompressible Navier-Stokes equations in irregular domains using the immersed interface method to achieve second order accuracy for the velocity. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2009 journal article

Bayesian ROC curve estimation under binormality using a rank likelihood

Journal of Statistical Planning and Inference, 139(6), 2076–2083.

By: J. Gu & S. Ghosal

Source: NC State University Libraries
Added: August 6, 2018

2009 journal article

Optimal Tracking Using Magnetostrictive Actuators Operating in Nonlinear and Hysteretic Regimes

JOURNAL OF DYNAMIC SYSTEMS MEASUREMENT AND CONTROL-TRANSACTIONS OF THE ASME, 131(3).

By: W. Oates* & R. Smith n

author keywords: control system synthesis; feedback; intelligent materials; intelligent structures; Kalman filters; magnetostrictive devices; nonlinear control systems; open loop systems; optimal control; perturbation techniques; PI control; piezoelectric actuators; piezoelectric materials; piezoelectric transducers; shape memory effects; stochastic processes
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

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