R. Griffiths

The Environments of Active Galactic Nuclei within the zCOSMOS Density Field (2009)

Silverman, J. D., Kovač, K., Knobel, C., Lilly, S., Bolzonella, M., Lamareille, F., ...

The impact of environment on active galactic nucleus (AGN) activity up to z ~ 1 is assessed by utilizing a mass-selected sample of galaxies from the 10k catalog of the zCOSMOS spectroscopic redshift...

Interlaminar approach for epiduroscopy in patients with failed back surgery syndrome (2009)

Fai, K. R., Engleback, M., Norman, J. B., Griffiths, R., Avellanal, M., Diaz-Reganon, G.

Coalescent experiments I: Unlabeled n-coalescent and the site frequency spectrum (2009)

Sainudiin, R., Thornton, K., Griffiths, R., McVean, G., Donnelly, P.

We derive the transition structure of a Markovian lumping of Kingman’s n-coalescent [1, 2]. Lumping a Markov chain is meant in the sense of [3, def. 6.3.1]. The lumped Markov process, referred as...

Sex-specific growth patterns and effects of hatching condition on growth in the reversed sexually size-dimorphic great skua Stercorarius skua (2009)

Kalmbach, E., Griffiths, R., Furness, R.W.

In many sexually size-dimorphic species of birds and mammals, the larger sex, often the males, show increased environmental sensitivity during ontogeny. This is generally assumed to be due to higher...

Effectiveness of brief structured interventions on risk factor modification for patients with coronary heart disease: a systematic review (2007)

Fernandez, R., Griffiths, R., Everett, B., Davidson, Patricia, Salamonson, Yenna, Andrew, S.

Background: The physical and psychosocial benefits of participation in cardiac rehabilitation following a coronary event have well been established. Despite these benefits there is strong evidence...

Sex-specific survival and parasitism in three-spined sticklebacks: seasonal patterns revealed by nolecular analysis (2003)

Arnold, K. E., Adam, A., Orr, K. J., Griffiths, R., Barber, Ian

A molecular method of identifying sex in three-spined sticklebacks Gasterosteus aculeatus showed that adult males had a higher prevalence of dermal Glugea anomala cysts than adult females, and...

General versus regional anaesthesia for hip fracture surgery: a meta- analysis of randomized trials (2000)

Urwin, SC, Parker, MJ, Griffiths, R

Do R&D tax credits work? Evidence from an international panel of countries 1979-1994 (1999)

Bloom, N., Griffiths, R., Van Reenen, J.

This paper examines the impact of fiscal incentives on the level of R&D investment. An econometric model of R&D investment is estimated using a new panel of data on tax changes and R&D spending in...

Choline acetyltransferase activity of rat synaptosomes is sensitive to enflurane, but not halothane or isoflurane (1994)

GRIFFITHS, R., BOYLE, E., GREIFF, J. M. C., ROWBOTHAM, D. J., NORMAN, R. I.

We have examined the activity of choline acetyl-transferase (ChAT) in rat cortical synaptosomes in the presence of three volatile anaesthetic agents: enflurane, halothane and isoflurane. The...