Daphnia magna is a species of Daphnia (a cladoceran freshwater water flea) which is native to northern and western North America, Eurasia and some regions of Africa.aphnia magna is a species of Daphnia (a cladoceran freshwater water flea) which is native to northern and western North America, Eurasia and some regions of Africa.
Logistics means having the right thing, at the right place, at the right time.. Logistics - (business definition) Logistics is defined as a business planning framework for the management of material, service, information and capital flows.It includes the increasingly complex information, communication and control systems required in today's business environment.ogistics-The science of planning, organizing and managing activities that provide goods or services. -- (MDC, LogLink / LogisticsWorld, 1997). Logistics-Logistics is the science of planning and implementing the acquisition and use of the resources necessary to sustain the operation of a system.
A logistic function or logistic curve is a common S shape (sigmoid curve), with equation: where e = the natural logarithm base (also known as Euler's number), x 0 = the x-value of the sigmoid's midpoint,L = the curve's maximum value, and.he logistic function is the inverse of the natural logit function and so can be used to convert the logarithm of odds into a probability. In mathematicaly notation the logistic function is sometimes written as expit in the same form as logit.