User profiles for "author:John Williams"

John W Williams Jr

- Verified email at duke.edu - Cited by 58528

John Williams

- Verified email at wisc.edu - Cited by 21819

Approaching a state shift in Earth's biosphere

AD Barnosky, EA Hadly, J Bascompte, EL Berlow… - Nature, 2012 - nature.com
Localized ecological systems are known to shift abruptly and irreversibly from one state to
another when they are forced across critical thresholds. Here we review evidence that the …

[HTML][HTML] Sarcopenia, dynapenia, and the impact of advancing age on human skeletal muscle size and strength; a quantitative review

WK Mitchell, J Williams, P Atherton, M Larvin… - Frontiers in …, 2012 - frontiersin.org
Changing demographics make it ever more important to understand the modifiable risk
factors for disability and loss of independence with advancing age. For more than two …

Novel climates, no‐analog communities, and ecological surprises

JW Williams, ST Jackson - Frontiers in Ecology and the …, 2007 - Wiley Online Library
No‐analog communities (communities that are compositionally unlike any found today)
occurred frequently in the past and will develop in the greenhouse world of the future. The …

DNA polymorphisms amplified by arbitrary primers are useful as genetic markers

JGK Williams, AR Kubelik, KJ Livak… - Nucleic acids …, 1990 - academic.oup.com
Molecular genetic maps are commonly constructed by analyzing the segregation of
restriction fragment length polymorphisms (RFLPs) among the progeny of a sexual cross …

[BOOK][B] Introduction to supercritical fluids and their applications

AA Clifford, JR Williams - 2000 - Springer
Cagniard de la Tour showed in 1822 that there is a critical temperature above which a single
substance can only exist as a fluid and not as either a liquid or gas. He heated substances …

Collaborative care management of late-life depression in the primary care setting: a randomized controlled trial

J Unützer, W Katon, CM Callahan, JW Williams Jr… - Jama, 2002 - jamanetwork.com
ContextFew depressed older adults receive effective treatment in primary care settings.
ObjectiveTo determine the effectiveness of the Improving Mood–Promoting Access to …

GRADE guidelines: 4. Rating the quality of evidence—study limitations (risk of bias)

GH Guyatt, AD Oxman, G Vist, R Kunz, J Brozek… - Journal of clinical …, 2011 - Elsevier
In the GRADE approach, randomized trials start as high-quality evidence and observational
studies as low-quality evidence, but both can be rated down if most of the relevant evidence …

GRADE guidelines 6. Rating the quality of evidence—imprecision

GH Guyatt, AD Oxman, R Kunz, J Brozek… - Journal of clinical …, 2011 - Elsevier
GRADE suggests that examination of 95% confidence intervals (CIs) provides the optimal
primary approach to decisions regarding imprecision. For practice guidelines, rating down …

Users' guides to the medical literature: II. How to use an article about therapy or prevention A. Are the results of the study valid?

GH Guyatt, DL Sackett, DJ Cook, G Guyatt, E Bass… - Jama, 1993 - jamanetwork.com
CLINICAL SCENARIO You are working as an internal medicine resident in a rheumatology
rotation and are seeing a 19-year-old woman who has had systemic lupus erythematosus …

Projected distributions of novel and disappearing climates by 2100 AD

JW Williams, ST Jackson… - Proceedings of the …, 2007 - National Acad Sciences
Key risks associated with projected climate trends for the 21st century include the prospects
of future climate states with no current analog and the disappearance of some extant …