User profiles for Ryan Ng

Ryan C Ng

Principal Research Scientist at Northrop Grumman Corporation
Verified email at northropgrummannext.net
Cited by 517

Long-term macroeconomic effects of climate change: A cross-country analysis

ME Kahn, K Mohaddes, RNC Ng, MH Pesaran… - Energy Economics, 2021 - Elsevier
We study the long-term impact of climate change on economic activity across countries, using
a stochastic growth model where productivity is affected by deviations of temperature and …

Excitation and detection of acoustic phonons in nanoscale systems

RC Ng, A El Sachat, F Cespedes, M Poblet, G Madiot… - Nanoscale, 2022 - pubs.rsc.org
Phonons play a key role in the physical properties of materials, and have long been a topic
of study in physics. While the effects of phonons had historically been considered to be a …

Smoking, drinking, diet and physical activity—modifiable lifestyle risk factors and their associations with age to first chronic disease

R Ng, R Sutradhar, Z Yao, WP Wodchis… - International journal …, 2020 - academic.oup.com
Background This study examined the incidence of a person’s first diagnosis of a selected
chronic disease, and the relationships between modifiable lifestyle risk factors and age to first …

Structural color three-dimensional printing by shrinking photonic crystals

Y Liu, H Wang, J Ho, RC Ng, RJH Ng… - Nature …, 2019 - nature.com
The coloration of some butterflies, Pachyrhynchus weevils, and many chameleons are notable
examples of natural organisms employing photonic crystals to produce colorful patterns. …

The current application of the Royston-Parmar model for prognostic modeling in health research: a scoping review

R Ng, K Kornas, R Sutradhar, WP Wodchis… - … and prognostic research, 2018 - Springer
Background Prognostic models incorporating survival analysis predict the risk (ie, probability)
of experiencing a future event over a specific time period. In 2002, Royston and Parmar …

Accuracy of Canadian health administrative databases in identifying patients with rheumatoid arthritis: a validation study using the medical records of rheumatologists

…, S Bernatsky, JM Paterson, K Tu, R Ng… - Arthritis care & …, 2013 - Wiley Online Library
Objective Health administrative data can be a valuable tool for disease surveillance and
research. Few studies have rigorously evaluated the accuracy of administrative databases for …

Increased risk of mycobacterial infections associated with anti-rheumatic medications

SK Brode, FB Jamieson, R Ng, MA Campitelli… - Thorax, 2015 - thorax.bmj.com
Rationale Anti-tumour necrosis factor (TNF) agents and other anti-rheumatic medications
increase the risk of TB in rheumatoid arthritis (RA). Whether they increase the risk of infections …

Additive manufacturing of high-refractive-index, nanoarchitected titanium dioxide for 3D dielectric photonic crystals

A Vyatskikh, RC Ng, B Edwards, RM Briggs… - Nano Letters, 2020 - ACS Publications
Additive manufacturing at small scales enables advances in micro- and nanoelectromechanical
systems, micro-optics, and medical devices. Materials that lend themselves to AM at the …

Increasing complexity of new nursing home residents in Ontario, Canada: A serial cross‐sectional study

R Ng, N Lane, P Tanuseputro… - Journal of the …, 2020 - Wiley Online Library
OBJECTIVES The main objective of the study was to investigate annual changes in the
sociodemographic characteristics, morbidity, and functional status of new nursing home …

Engineering nanoscale hypersonic phonon transport

O Florez, G Arregui, M Albrechtsen, RC Ng… - Nature …, 2022 - nature.com
Controlling vibrations in solids is crucial to tailor their elastic properties and interaction with
light. Thermal vibrations represent a source of noise and dephasing for many physical …