Twitter updates

Monday, March 30, 2009

International Astronomy Year

International Astronomy Year

Website:






100 hours of Astronomy website and twitter:


You can also visit:
365 DAYS OF ASTRONOMY - http://365daysofastronomy.org/

Sunday, March 29, 2009

Earth Hour - videos

Earth Hour was marked this year in 90 countries. I hope next year can be 120... we'll see...

See the video from SciAm

or those ones from YouTube:


Saturday, March 28, 2009

Earth Hour

This saturday was the day to Earth Hour.
Yes, a simplest gesture to our planet: close the light about one hour.
Our planet deserve it... our futur and children too.
Be one of the people that cares... Sign Up!

Sign up for Earth Hour
or visit: EarthHour.org

Tuesday, March 24, 2009

Robot Woman

The futur is here...
It seems like we are on Terminator's film. Well, perhaps not. 
The robotics can be usefull in hard industry, that means that we have to be prepared and qualify to take a good job to operate with them and create the instructions to execute what we need.
See the movie...

Monday, March 23, 2009

Test your physics' knowledge


Time to relax and test your physics' knowledge: 

Sunday, March 22, 2009

MIT course videos from YouTube


MIT course videos from YouTube 

 MIT 8.01 Physics I: Classical Mechanics

 MIT 8.02 Electricity and Magnetism

 MIT 8.03 Physics III: Vibrations and Waves

 MIT 18.06 Linear Algebra

 MIT 6.002 Circuits and Electronics

 MIT 18.03 Differential Equations

 MIT 5.74 Introductory Quantum Mechanics II

 MIT 16.885J Aircraft Systems Engineering

 MIT 16.01 Unified Engineering

 MIT 6.013 Electromagnetics and Applications

 MIT 3.320 Atomistic Computer Modeling of Materials

 MIT 18.085 Computational Science & Engineering I

 MIT 18.086 Mathematical Methods for Engineers II

 MIT Exploring Black Holes: General Relativity and Astrophysics

Simulations


Follow this links to find some simulations:


Friday, March 20, 2009

Concentration of CO2 in the atmosphere

"Drilling into the rocks off the coast of Antarctica is revealing a more accurate picture of our future climate. That's because about 4 million years ago, carbon dioxide levels in the atmosphere were roughly 400 parts-per-million--a level we're likely to reach again in the next few years. Already, CO2 concentrations in the atmosphere are 386 ppm, up from 280 ppm just two centuries ago." in Scientific American

This article is related with others, posted in this blog:

Wednesday, March 18, 2009

GOCE by ESA

English version:
Yesterday it was launched the GOCE (Gravity field and steady-state Ocean Circulation Explorer) developed by the European Space Agency (ESA). 
"The main instrument of the payload is an electrostatic gravity gradiometers, of last generation, that incorporates six highly sensitive accelerometers, mounted in pairs along three perpendicular axes in a carbon-carbon structure ultra-stable. The mission will measure not the actual gravity but small differences in gravity between the pairs of accelerometers that are 50 cm distance between them. " 
 

GOCE liftoff

 
One mission, many benefits 
  
The mapping of the gravity field of the Earth with high precision will be useful to all areas of Earth sciences. 

In the field of geodesy, an unified model of reference in measurements of height, allowing a better mapping of sea level changes. 

In the field of oceanography, is to get a better knowledge of the field of gravity, will reduce the current uncertainty concerning about the transfer of heat and mass of the oceans, resulting in huge improvements in global models about movement of mass of water in the oceans and climate forecasting. The GOCE will also improve our knowledge about the rocky substrate of the ice caps in Greenland and Antarctica. 

In the field of geophysics, combining the results of GOCE with data of magnetism, topography and seismology will help to produce maps in 3D, with great detail, of changes in density in the earth's crust and upper mantle, improving our understanding about the processes that are responsible for natural disasters. 

source ESA


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Versão Portuguesa:
Ontem foi lançado o GOCE (Gravity field and steady-state Ocean Circulation Explorer) desenvolvido pela Agência Espacial Europeia (ESA).

"O instrumento principal da carga útil é um Gradiómetro de Gravidade Electrostático de última geração que incorpora seis acelerómetros altamente sensíveis, montados aos pares ao longo de três eixos perpendiculares numa estrutura carbono-carbono ultra-estável. A missão irá medir não a gravidade propriamente dita mas as pequenas diferenças de gravidade entre os pares de acelerómetros que estão a 50 cm de distância entre si."

 

Understanding ocean circulation
 
Uma missão, muitos benefícios
 

A cartografia do campo de gravidade da Terra feita com elevada precisão será útil para todas as áreas das ciências da Terra.

No campo da geodesia, será criado um modelo de referência unificado nas medições da altura, permitindo um melhor levantamento das alterações do nível do mar.

No campo da oceanografia, ao obter-se um melhor conhecimento do campo de gravidade, irá reduzir significativamente as incertezas actuais relativamente à transferência de massa e calor dos oceanos, obtendo-se enormes melhorias nos modelos globais de circulação das massas de água nos oceanos e de previsão climática. O GOCE irá ainda melhorar o nosso conhecimento acerca do substrato rochoso das calotes polares na Gronelândia e Antárctida.

No campo da geofísica, combinando os resultados do GOCE com os dados do magnetismo, da topografia e da sismologia, irá ajudar a produzir mapas em 3D, com enorme detalhe, das variações de densidade na crosta terrestre e no manto superior, melhorando a nossa compreensão dos processos responsáveis pelas catástrofes naturais. 

fonte ESA

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Versión Española:
Ayer se puso en marcha el GOCE (Explorador de campo de gravedad y de estado sobre la Circulación Oceánica) desarrollado por la Agencia Espacial Europea (ESA). 
"El principal instrumento de la carga útil es un gradiómetro electrostático de gravedad, de última generación que incorpora seis acelerómetros muy sensibles, montado en parejas a lo largo de tres ejes perpendiculares, en una estructura de carbono-carbono ultra-estable. La misión no es la medida real de la gravedad pero las pequeñas diferencias en la gravedad entre los pares de acelerómetros que son 50 cm de distancia entre ellos. " 
  
Una misión, muchas ventajas 
  
La cartografía del campo de gravedad de la Tierra con gran precisión será de utilidad a todos los ámbitos de las ciencias de la Tierra. 

En el ámbito de la geodesia, un modelo unificado de referencia en las mediciones de altura, permitiendo una mejor asignación de los cambios del nivel del mar. 

En el campo de la oceanografía, es obtener un mejor conocimiento del campo de gravedad, se reducirá la incertidumbre actual sobre la transferencia de calor y masa de los océanos, dando lugar a grandes mejoras en los modelos globales de circulación de las masas de agua en los océanos y pronósticos climáticos. 

En el campo de la geofísica, la combinación de los resultados de GOCE con los datos de magnetismo, la topografía y la sismología contribuirá a la realización de mapas en 3D, con gran detalle, de los cambios en la densidad de la corteza terrestre y manto superior, para mejor comprensión de los procesos responsables de los desastres naturales. 

fuente ESA

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images from ESA

José Gonçalves' shared items