Marine mammals can play important ecological roles in aquatic ecosystems, and their presence can be key to community structure and function.Consequently, marine mammals are often considered indicators of ecosystem health and flagship species.Yet, historical population declines caused by exploitation, and additional current threats, such as climate
BACKGROUND: The 2007-2009 threadheaders.shop financial crisis, and its fallout, has strongly emphasized the need to define new ways and measures to study and assess the stock market dynamics.METHODOLOGY/PRINCIPAL FINDINGS: The S&P500 dynamics during 4/1999-4/2010 is investigated in terms of the index cohesive force (ICF--the balance between the sto
For elderly persons, a fall can cause serious injuries such as a hip fracture or head injury.Here, an advanced first aid system is proposed for monitoring elderly patients with heart conditions that puts them at risk of falling and for providing first aid supplies using an unmanned aerial vehicle.A hybridized fall detection algorithm (FDB-HRT) is p