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Prometheus is a free software application used for event monitoring and alerting. [2] It records metrics in a time series database (allowing for high dimensionality ) built using an HTTP pull model , with flexible queries and real-time alerting.
These metrics are therefore computed statically from the code. Halstead's goal was to identify measurable properties of software, and the relations between them. This is similar to the identification of measurable properties of matter (like the volume, mass, and pressure of a gas) and the relationships between them (analogous to the gas equation ).
Prometheus (metrics and time-series) Linkerd (service mesh) OpenFaaS (management and auto-scaling of compute) NATS (asynchronous message bus/queue) Kubernetes (declarative, extensible, scale-out, self-healing clustering) SMACK [10] Apache Spark (big data and MapReduce) Apache Mesos (node startup/shutdown) Akka (toolkit) (actor implementation)
In mathematics, the signature (v, p, r) [clarification needed] of a metric tensor g (or equivalently, a real quadratic form thought of as a real symmetric bilinear form on a finite-dimensional vector space) is the number (counted with multiplicity) of positive, negative and zero eigenvalues of the real symmetric matrix g ab of the metric tensor with respect to a basis.
OxMetrics is an econometric software including the Ox programming language for econometrics and statistics, developed by Jurgen Doornik and David Hendry.OxMetrics originates from PcGive, one of the first econometric software for personal computers, initiated by David Hendry in the 1980s at the London School of Economics.
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A special case of a metric connection is a Riemannian connection; there exists a unique such connection which is torsion free, the Levi-Civita connection. In this case, the bundle E is the tangent bundle TM of a manifold, and the metric on E is induced by a Riemannian metric on M.
Players' choices are used to model better color metrics. [10] The Apetopia game, which was launched by University of Berlin , is designed to help scientists understand perceived color differences. This game is intended to provide data on how the shades of color are perceived by people in order to model the best color parameters.