Audio/Video Lectures A States' Rights Battle over Light Bulbs The incandescent light bulb has been around for more than 130 years. But starting in January 2012, it will become a piece of history, pulled off the shelves in all 50 states—unless a group of fired-up conservatives manage to spark a mini-revolution over states’ rights. In 2007, George W. Michele Bachmann, the Minnesota congresswoman and Presidential candidate, was one of the first national figures to fight for the right to light up a room Thomas Edison-style. Washington having failed them, the light bulb brigade is now taking its case to the states. Some of the states, including Michigan, aren’t currently home to a light bulb manufacturer. One state is giving bulb activists hope.
Interactive 3D model of Solar System Planets and Night Sky Inicio Biblioteca Digital Mundial Interactive 3D model of Solar System Planets and Night Sky These Cars Built By High School And College Students Get Up To 3,587 MPG Every year, the Shell Eco-Marathon Americas challenges over 100 teams of high school and university students to build and race incredibly energy-efficient vehicles powered by all types of sources--solar, electric, fuel cell, gasoline, and more. This year’s race was especially impressive: The prototype gasoline vehicle of Quebec City-based Laval University achieved a staggering 3,587 miles per gallon on the Houston racetrack. That’s the most mileage per gallon ever seen at a Shell Eco-Marathon Americas competition. In the UrbanConcept Diesel category, which focuses on practical vehicle designs (Laval’s prototype vehicle was focused on efficiency more than practicality), Louisiana Tech took first place for its HotRod diesel car. The vehicle traveled around the track at 315.9 mpg. The team is already working on next year’s design, which will have a completely new drive train. Check out all the winners in the slide show above.
Herramientas: Mapas Conceptuales > Uso de Mapas Conceptuales en procesos educativos Los mapas conceptuales son redes semánticas que posibilitan representar gráficamente conceptos y sus interrelaciones para poner en evidencia las estructuras de conocimiento que las personas tienen en sus mentes [1]. Fueron desarrollados por Joseph D. Novak, profesor emérito en la Universidad de Cornell, quien a su vez se basó en la teoría del aprendizaje significativo de David Ausubel. Visualmente, tienen formas sencillas pero poderosas, compuestas por nodos que representan conceptos, unidos por medio de líneas con etiquetas, que simbolizan las relaciones existentes entre estos. Al construirlos, pueden tomar una de las siguientes formas: Lineales tipo Diagrama de Flujo; Sistémicos con información ordenada en forma lineal con ingreso y salida de información; o Jerárquicos, cuando la información se organiza de la más a la menos importante o de la más incluyente y general a la menos incluyente y específica. Autor: Juan Carlos López García
Shrunken Proton Baffles Scientists One of the Universe's most common particles has left physicists completely stumped. The proton, a fundamental constituent of the atomic nucleus, seems to be smaller than thought. And despite three years of careful analysis and reanalysis of numerous experiments, nobody can figure out why. An experiment published today in Science only deepens the mystery, says Ingo Sick, a physicist at the University of Basel in Switzerland. The proton's problems started in 2010, when a paper published in Nature seemed to show that the particle was 4% smaller than originally thought. The latest experiment also used muonic hydrogen, but probed a different set of energy levels in the atom. But it is still not compatible with the measurements taken by non-muonic techniques, says John Arrington, a nuclear physicist at Argonne National Laboratory in Lemont, Illinois. Perplexing puzzle One possibility is that Antognini's team has inadvertently discovered new physics. Arrington and Sick both have their doubts.
GoAnimate: historietas animadas Red Infod GoAnimate es una herramienta 2.0 que permite crear historietas animadas a modo de video. Tiene un gran potencial educativo ya que se puede utilizar para diferentes momentos de una clase, no solamente para ser utilizado como un recurso para el docente, también para que los alumnos puedan aprovechar un medio de composición diferente, rico por su posibilidad expresiva, entretenido, especial para exponer sus propias ideas y con una importante cantidad de componentes multimediales. La producción de historietas (o cómics) requiere que los estudiantes combinen imágenes y escritura para crear un guión gráfico, y además, al basarse en fotogramas secuenciales, deben determinar el tema central y elaborar una síntesis para narrar cualquier historia en forma concreta y creativa en un tiempo limitado. GoAnimate, al permitir agregar voces, ofrece un medio de expresión extra para que los alumnos pueden componer muy buenos resultados. Mediante la historieta animada el alumno puede: Acceso al sitio