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Presurgery conditioning interventions (prehabilitation) in adults undergoing lower limb surgery for peripheral arterial disease (2019)
Journal Article
Smith, G. E., Palmer, J., Pymer, S., Smith, G. E., Harwood, A. E., Ingle, L., …Chetter, I. C. (2019). Presurgery conditioning interventions (prehabilitation) in adults undergoing lower limb surgery for peripheral arterial disease. The Cochrane database of systematic reviews, 2019(9), https://doi.org/10.1002/14651858.cd013407

This is a protocol for a Cochrane Review (Intervention). The objectives are as follows: To assess the effectiveness of prehabilitation (preoperative exercise, either alone or in combination with nutritional or psychological interventions or both)... Read More about Presurgery conditioning interventions (prehabilitation) in adults undergoing lower limb surgery for peripheral arterial disease.

A calibration method for non-positive definite covariance matrix in multivariate data analysis (2017)
Journal Article
Huang, C., Farewell, D., & Pan, J. (2017). A calibration method for non-positive definite covariance matrix in multivariate data analysis. Journal of Multivariate Analysis, 157, 45-52. https://doi.org/10.1016/j.jmva.2017.03.001

Covariance matrices that fail to be positive definite arise often in covariance estimation. Approaches addressing this problem exist, but are not well supported theoretically. In this paper, we propose a unified statistical and numerical matrix calib... Read More about A calibration method for non-positive definite covariance matrix in multivariate data analysis.