Physics and teaching
Earth Field Magnetometer - SWOMAG * Magnetic field is meassured each 10 seconds and compensated for temperature drift. * Upload data to COSM (Pachube) * RTC is syncronized to internet time server in regular intervals
Projects » Cohn-zone Here are a few of my projects.. This list is not complete.
Applications Thermal imaging can be used to document heat/AC leaks from insulation gaps on a building's facade, reveal warmer ground water inflows (either fresh or chemical-laden) or "thermal pollution" from industrial processes entering ocean-temperature waterbodies, as well as identify areas on the human body experiencing infection or stress (includes epidemiological applications). Thermal photography
Calculations - DiracDelta Science & Engineering Encyclopedia Aerodynamics Drag Coefficient
The electromagnetic waves that compose electromagnetic radiation can be imagined as a self-propagating transverse oscillating wave of electric and magnetic fields. This diagram shows a plane linearly polarized EMR wave propagating from left to right. The electric field is in a vertical plane and the magnetic field in a horizontal plane. The two types of fields in EMR waves are always in phase with each other with a fixed ratio of electric to magnetic field intensity. Electromagnetic radiation (EM radiation or EMR) is one of the fundamental phenomena of electromagnetism, propagating and traveling through space via photon wave particles, carrying radiant energy. In a vacuum, it propagates at a characteristic speed, the speed of light, normally in straight lines.
Liquid Crystal Group Hamburg
With the general theory of relativity, in which Einstein managed to reconcile relativity and gravitation, he had to discard the traditional physics worldview, which saw space as merely a stage on which the events of the world unfold. Instead, space-time is a dynamic entity, which is distorted by any matter that is contained in it, and which in turn tells that matter how to move and evolve. This interaction between spacetime and matter is described by Einstein's geometric, relativistic theory of gravity. The consequences of that theory are spectacular. General Relativity — Einstein Online
Demoing the SudoGlove at the 2011 Open Hardware Summit What is the SudoGlove? The SudoGlove is a gesture controller that can be easily interfaced with hardware or software via a wireless connection. The glove implements an array of sensors plus filtering circuitry and mathematical analysis firmware to derive state values for each sensor and transmits them to an authorized receiver. I have used the glove to drive an RC car, to synthesize music, to manipulate openGL video, to control arbitrary processing software, and to control performance lighting effects. You can see videos and examples of these interfaces below. SudoGlove Hardware Controller | JeremyBlum.com
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Muslims Inventions in the Golden Age Islamic Astronomy: Astronomical instruments Muslim astronomers developed a number of astronomical instruments, including several variations of the astrolabe, originally invented by Hipparchus in the 2nd century BCE, but with considerable improvements made to the device in the Muslim world. These instruments were used by Muslims for a variety of purposes related to astronomy, astrology, horoscopes, navigation, surveying, timekeeping, Qibla, Salah, etc. AstrolabesBrass astrolabe by Muhammad al-Fazari in the 8th century.Earliest surviving astrolabe in 315 AH (927-928 CE). Mechanical geared astrolabe by Ibn Samh (c. 1020).Navigational astrolabe was invented in the Islamic world.
Brief History of Automata The following buttons will lead you on to a number of topics designed to help you understand more about mechanisms, basic engineering principles as well as designing and making your own automata and mechanical toys. Craft Education have two books entitled: 'How to Design and Make Automata' and 'How to Design and Make Simple Automata' as well as aCD-ROM for more information click on the links below. Tools and Construction Techniques How to contact us How to design automata and mechanical toys
This circuit is an astable multivibrator, or oscillator. The two transistors are cross-coupled in such a way that the circuit switches back and forth between two states. In one state, the base of Q1 is about one diode drop above ground, allowing a base current to flow. This keeps Q1 switched on, in saturation mode, allowing a current to flow through the collector, keeping Q1's collector voltage low, and discharging C1. Astable Multivibrator (Oscillator)
The secret lives of invisible magnetic fields are revealed as chaotic ever-changing geometries . Magnetic Movie
Cool Experiments with Magnets This web site is devoted to magnetism and the cool experiments you can do with permanent magnets and electro-magnets. Some of the experiments are very basic - things you've done since second grade.
Help NASA find life on Mars -- mapper
Keith's Think Zone
An impressive homemade wall climbing system from a simple vacuum cleaner was created by a scientist from BBC. After being bitten by a radioactive spider, the mild-mannered Peter Parker in the Spiderman movies and comics finds himself able to climb up the side of buildings. The enterprising scientist Jem Stansfield got the same effect in real life from the two vacuum cleaners purchased at Tesco. From the video below, he demonstrated his Spiderman Prowess by climbing up the 120 feet front wall of BBC Television center as he documented his experience. The image below shows how he used the suction power of a modified vacuum cleaner motor to hold his weight on the wall. Vacuum Cleaner Used for Climbing Up Wall | HACKOLOG - Amazing Hacks and Mods
Aurora Detectors You don't have to check the internet to find out when the Northern Lights might be visible from where you are, you can make your own magnetometer to act as a detector. You needn't be a rocket scientist to do it! There are two different detectors: The pop-bottle-detector is very easy to make, and very easy to use. The compass-detector uses a simple h4_op_amp circuit with a negative feedback loop and is suitable to be used with a data logging device, or other voltage measuring device. See further information about where to obtain the parts and details of the original designs.
Physics Solar Workshop
Tekniska museet - Tekniska museet