A 60 year-old woman developed the abrupt onset of difficulty seeing on the left side following the traumatic placement of a central line that punctured the right subclavian artery. Posterior Cerebral ...

Data Normalization vs. Standardization is one of the most foundational yet often misunderstood topics in machine learning and ...

Christina Majaski writes and edits finance, credit cards, and travel content. She has 14+ years of experience with print and digital publications. Robert Kelly is managing director of XTS Energy LLC, ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Principal Financial Group, Inc. provides retirement, asset management, and insurance products and services to businesses, individuals, and institutional clients worldwide. The company operates through ...

Indicator species are living organisms that tell us that something has changed or is going to change in their environment. They can be easily observed, and studying them is considered a cost-effective ...

Principal Financial Group, Inc. is a financial company, which offers financial products and services to businesses, individuals and institutional clients. It specializes in retirement solutions, ...