User profiles for Stephen Nash

Stephen Nash

College of Engineering & Informatics, National University of Ireland Galway, Ireland
Verified email at nuigalway.ie
Cited by 2454

[BOOK][B] Numerical methods and software

D Kahaner, C Moler, S Nash - 1989 - dl.acm.org
Natural languages like English are rich, complex, and powerful. The highly creative and
graceful use of languages like English and Tamil, by masters like Shakespeare and …

[HTML][HTML] A review of water quality index models and their use for assessing surface water quality

MG Uddin, S Nash, AI Olbert - Ecological Indicators, 2021 - Elsevier
The water quality index (WQI) model is a popular tool for evaluating surface water quality. It
uses aggregation techniques that allow conversion of extensive water quality data into a …

A Hessenberg-Schur method for the problem AX+ XB= C

G Golub, S Nash, C Van Loan - IEEE Transactions on …, 1979 - ieeexplore.ieee.org
One of the most effective methods for solving the matrix equation AX+XB=C is the Bartels-Stewart
algorithm. Key to this technique is the orthogonal reduction of A and B to triangular …

[BOOK][B] Linear and Nonlinear Optimization 2nd Edition

I Griva, SG Nash, A Sofer - 2008 - SIAM
An n-dimensional vector x is an array of n scalars x1, x2,..., xn. The notation x represents the
array when its elements are arranged in a column, while the notation xT represents the …

Newton-type minimization via the Lanczos method

SG Nash - SIAM Journal on Numerical Analysis, 1984 - SIAM
This paper discusses the use of the linear conjugate-gradient method (developed via the
Lanczos method) in the solution of large-scale unconstrained minimization problems. At each …

[HTML][HTML] A comprehensive method for improvement of water quality index (WQI) models for coastal water quality assessment

MG Uddin, S Nash, A Rahman, AI Olbert - Water Research, 2022 - Elsevier
Here, we present an improved water quality index (WQI) model for assessment of coastal
water quality using Cork Harbour, Ireland, as the case study. The model involves the usual four …

[HTML][HTML] Gemcitabine and docetaxel versus doxorubicin as first-line treatment in previously untreated advanced unresectable or metastatic soft-tissue sarcomas …

…, K Küver, R Tirabosco, S Forsyth, S Nash… - The lancet …, 2017 - thelancet.com
Background For many years, first-line treatment for locally advanced or metastatic soft-tissue
sarcoma has been doxorubicin. This study compared gemcitabine and docetaxel versus …

[HTML][HTML] A survey of truncated-Newton methods

SG Nash - Journal of computational and applied mathematics, 2000 - Elsevier
Truncated-Newton methods are a family of methods for solving large optimization problems.
Over the past two decades, a solid convergence theory has been derived for the methods. In …

[HTML][HTML] A novel approach for estimating and predicting uncertainty in water quality index model using machine learning approaches

MG Uddin, S Nash, A Rahman, AI Olbert - Water Research, 2023 - Elsevier
With the significant increase in WQI applications worldwide and lack of specific application
guidelines, accuracy and reliability of WQI models is a major issue. It has been reported that …

[HTML][HTML] Performance analysis of the water quality index model for predicting water state using machine learning techniques

MG Uddin, S Nash, A Rahman, AI Olbert - Process Safety and …, 2023 - Elsevier
Existing water quality index (WQI) models assess water quality using a range of classification
schemes. Consequently, different methods provide a number of interpretations for the …