Category:Systems A system is a set of entities, real or abstract, comprising a whole where each component interacts with or is related to at least one other component and they all serve a common objective. For the purpose of organizing articles into categories, there are four major type of system which can reasonably be expected to contain every type of system under its category tree: Physical systems, Biological systems, Social systems, and Conceptual systems. Subcategories This category has the following 7 subcategories, out of 7 total. Pages in category "Systems" The following 25 pages are in this category, out of 25 total. Portal:Gravitation From Wikipedia, the free encyclopedia The first mathematical formulation of gravity was published in 1687 by Sir Isaac Newton. His law of universal gravitation was the standard theory of gravity until work by Albert Einstein and others on general relativity. Steven Weinberg noted that we could still build a suspension bridge with Newton's laws. Stars in the gravitational field of a globular cluster, M80. Newton conceived of gravitation when he considered the trajectory of a projectile . When Newton heard the sound of an apple falling on the ground, he asked himself might the same cause (which he called gravitation) for the motion of the apple, also explain the motion of the moon?. The law expressed as an equation: where: = gravitational force between two objects = mass of first object = mass of second object = distance between the center of mass of the objects = universal constant of gravitation The Law of Falling Bodies We can distinguish several meanings for mass in physics:
Systems science Impression of systems thinking about society. Systems science is an interdisciplinary field that studies the nature of complex systems in nature, society, and science itself. It aims to develop interdisciplinary foundations that are applicable in a variety of areas, such as engineering, biology, medicine, and social sciences.[1] Systems science covers formal sciences such as complex systems, cybernetics, dynamical systems theory, and systems theory, and applications in the field of the natural and social sciences and engineering, such as control theory, operations research, social systems theory, systems biology, systems dynamics, systems ecology, systems engineering and systems psychology.[2] Theories[edit] Since the emergence of the General Systems Research in the 1950s,[3] systems thinking and systems science have developed into many theoretical frameworks. Systems notes of Henk Bikker, TU Delft, 1991 Systems analysis Systems design System dynamics Systems engineering Systems Methodologies
THE SECOND COMING — A MANIFESTO By David Gelernter Stewart Brand, David Ditzel, John C. Dvorak, Freeman Dyson, George Dyson, Douglas Rushkoff, Rod Brooks, Lee Smolin, Jaron Lanier, David Farber, Danny Hillis, Vinod Kholsa, John McCarthy on "The Second Coming - A Manifesto" by David Gelernter Marc Hauser, Milford Wolpoff, V.S. Responses to "The Second Coming - A Manifesto" by David Gelernter Stewart Brand: The sequence is clear. David Ditzel: Gelernter is ahead of us all in peering through the fog that we call the future of technology. John C. Feeman Dyson: I suspect that he has a one-sided view of computing. George Dyson: Let us hope that Gelernter's prophecies continue to be fulfilled. Douglas Rushkoff: ...the trick to seeing through today's interfaces — a way of envisioning information architecture that David does effortlessly — involves distinguishing between our modeling systems and the models they build. Jaron Lanier: This reminds of Marx's vision of what should happen after the revolution. From: Stewart Brand Date: June 11, 2000
Portal:Fire Fire is a form of combustion, and is one of the most spectacular chemical phenomena, that transforms a solid or a liquid substance into gaseous substances with simultaneous release of heat and light energy. Controlling fire for the purposes of providing heat and light was one of early humankind's great achievements. This portal contains information relating to fire and firefighting. The Hamlet chicken processing plant fire was an industrial disaster that took place at the Imperial Foods chicken processing plant in Hamlet, North Carolina, USA on September 3, 1991, after a failure in a faulty modification to a hydraulic line. Twenty-five people were killed and 54 injured in the fire as they were trapped behind locked fire doors. The fire was North Carolina's worst industrial disaster, and the third worst American industrial disaster, exceeded only by the 1947 Texas City disaster and the 1911 Triangle Shirtwaist Factory fire. Purge cache to show recent changes
100% renewable energy Practice of exclusively using easily replenished natural resources to do work 100% renewable energy is the goal of the use renewable resources for all energy. 100% renewable energy for electricity, heating, cooling and transport is motivated by climate change, pollution and other environmental issues, as well as economic and energy security concerns. Shifting the total global primary energy supply to renewable sources requires a transition of the energy system, since most of today's energy is derived from non-renewable fossil fuels. Research into this topic is fairly new, with very few studies published before 2009, but has gained increasing attention in recent years. Feasibility[edit] No uniform definition for 100% renewable energy systems has been adopted across the published literature.[10] Existing technologies, including storage, are capable of generating a secure energy supply at every hour throughout the year. Mark Z. Energy transition[edit] Stephen W. History[edit] Oil (31.2%)
Main Page - WikipediaPlus Portal:Molecular and Cellular Biology From Wikipedia, the free encyclopedia The Molecular and Cellular Biology Portal Welcome to the Molecular and Cellular Biology portal. Molecular and cellular biology encompass many biological fields including: biotechnology, developmental biology, physiology, genetics and microbiology. Molecular and cellular biology news Here are some things you can do: —Jules Henri Poincaré, La Science et l'Hypothèse (Of Science and Hypotheses) (1901) Molecular and Cellular Biology topics Purge server cache Augmented learning Learning technique Augmented learning is an on-demand learning technique where the environment adapts to the learner. By providing remediation on-demand, learners can gain greater understanding of a topic while stimulating discovery and learning.[1] Technologies incorporating rich media and interaction have demonstrated the educational potential that scholars, teachers and students are embracing. Instead of focusing on memorization, the learner experiences an adaptive learning experience based upon the current context. Augmented learning is often used by corporate learning and development providers to teach innovative thinking and leadership skills by emphasizing “learning-by-doing”. Augmented learning is closely related to augmented intelligence (intelligence amplification) and augmented reality. In mobile reality systems,[2] the annotation may appear on the learner's individual "heads-up display" or through headphones for audio instruction. Understanding language[edit] Games