Mechanics
Mechanics
Violation of Heisenberg's Uncertainty Principle
As Einstein's E=mc2 is of importance to theory of relativity, so is Heisenberg's uncertainty principle in the world of quantum mechanics which not only is profound, but also popular among non-physicists. This principle states a fundamental limit on the accuracy with which certain pairs of physical properties of a particle, such as position and momentum, can be simultaneously known. In layman's terms, the more precisely one property is measured, the less precisely the other can be controlled, determined, or known.
But this principle appears in two formulations, which confuses many physicists. A team at the Vienna University prepared a stream of neutrons and determined two spin components simultaneously for each, violating Heisenberg's principle.
Heisenberg formulated his principle in 1927 as ε(q)η(p) ≥ h/4π, which says that in determining position, there will be an error in momentum, and vice versa. The same year Earle Kennard derived a different formulation which was later generalized by Howard Robertson as σ(q)σ(p) ≥ h/4π. This inequality says that you cannot suppress quantum fluctuations of both position σ(q) and momentum σ(p) lower than a certain limit simultaneously. The fluctuation exists regardless whether it is measured or not, and the inequality does not say anything about what happens when a measurement is performed.
Micro Arc Oxidation and HTC Aluminium Unibody Design
Though I have studied several anodizing and metal coating processes before, Micro Arc Oxidation (MAO) was something new which interested me. I was unaware of this process until I heard Scott Croyle, Vice President of Design at HTC, at this year's Mobile World Congress that their new HTC One S comes with a tough aluminium unibody construction which was manufactured using MAO process. HTC is known for their unique aluminium unibody constructions which they implement in their smartphone devices.
Scott Croyle described the process in which they baked aluminium coated with microstratic particles in a plasma field, with temperature reaching higher than that of Sun's surface. Basically, Plasma Electrolytic Oxidation or Micro Arc Oxidation is an electrochemical surface treatment process to produce oxide coatings on metal surfaces. Though it is similar to anodizing, MAO involves considerably higher potential and generates discharges as a result of which plasma is produced, which modifies the surface of the metal. The coating provides high hardness, resistance to wear, heat, rust and also to electrical insulation.
GM's got a brand new electric (induction) motor
Cars with electric motors running the show are few and far between, which is something we need to change -- that's why General Motors is finishing up a new plant in White Marsh, Maryland. The facility will be cooking up magnet and induction electrical motors to power GM's next generation of EVs. The first off the line will be the 85 kW (114hp) electric engine that'll sit inside the hood of 2013's dinky Chevy Spark EV. Peek after the break and you'll be rewarded with a cornucopia (that's the technical term for four, right?) of videos and a press release about the company's plans for electrical domination.
GM is focused on the development of permanent magnet and induction motors for a variety of applications. During a recent tutorial at the Wixom facility, news media were given the opportunity to hand build portions of a permanent magnet motor, the exact 85 kW (114 hp) permanent magnet motor configuration that will be used in the recently announced Chevrolet Spark electric vehicle to debut in 2013.
The White Marsh facility will produce electric motors for the Spark and other future vehicles. Currently, GM uses electric motors as part of the propulsion system in nine vehicles including the Chevrolet Volt, Chevrolet Malibu Eco, Chevrolet Silverado Hybrid, Buick Lacrosse eAssist, Buick Regal eAssist, GMC Sierra Hybrid, GMC Yukon and Yukon Denali Hybrid, and Cadillac Escalade Hybrid.
Mind-Reading Prius Bike Can Shift Gears with Just a Thought!
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Toyota and Parlee Cycles Team Up to Develop New Bicycle Based on Prius Design Principles
To commemorate the 10 year anniversary of the Prius and a decade of environmentally sustainable transportation, Toyota has teamed up with Parlee Cycles in an effort to create a bicycle based on Prius design principles. Both companies are known for their innovative approach within their own industries, but their goals are the same: to develop sustainable, cutting edge green design and technology.
Commissioned by Toyota, Parlee is developing this state-of the art, ultra efficient bicycle in an effort to encompass the best of both the auto and non-auto transportation worlds. To document and comment on the event, Parlee has reached out to cyclist and blogger John Watson, who has done a great job at giving us a first hand account of this exciting event.
Despite the fact that bicycle design has stayed relatively the same throughout the years, the design team decided to look at all the different possibilities, using inspiration from city, road, and touring bikes, and combining it with some Prius inspired concepts. The preliminary design sketches alluded to what the designers call an “areo road bike.
The bike frame was designed using carbon fiber tubing – a lightweight, aerodynamic, stiff and seamless material, perfect for racing – making for a good flexible bike. Although carbon fiber isn’t exactly recyclable, Parlee minimizes their waste by reusing all of their scraps in their design. The carbon fiber tubing is then covered with a raw black finish, giving it an elegant look. The mold is overlaid on the tubing along with resin.
Japan Speeds Ahead with 500km/hr MagLev
The Japanese government has signaled Central Japan Railway "to proceed with construction" of its magnetically levitated train line between Tokyo, Nagoya and Osaka. On May 27 Transport Minister Akihiro Ohata directed the company, known as JR Tokai, to move forward with the 9 trillion yen project that has been in development since the 1970s.
In July 2009, Japan's Maglev Technological Practicality Evaluation Committee of Japan's Ministry of Land, Infrastructure, Transport and Tourism validated that the superconducting maglev trains are ready for revenue service. "The technologies of the Superconducting Maglev have been established comprehensively and systematically, which makes it possible to draw up detailed specifications and technological standards for revenue service," the committee said. The world's fastest trains, maglev trains travel without touching the ground. Instead, they run levitated above their guideway by using repulsive and attractive electromagnetic forces between superconducting magnets on board the vehicle and coils on the ground. Running at 505 kilometers (313 miles) per hour, the maglev trains will cover the distance between Tokyo and Nagoya in about 40 minutes. When the line is completed, maglev trains will travel the 514 km (320 mile) distance between Tokyo and Osaka in 67 minutes. The maglev trains are expected to start carrying passengers between Tokyo and Nagoya in 2027 and between Tokyo and Osaka in 2045.
The Mechanism Behind Differential Gears
The video below posted on YouTube is indeed the best and simplest available tutorial explaining exactly how the differential gears work.
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Electromagnetic & Electrodynamic Suspension
Electromagnetic Suspension (EMS) is the magnetic levitation of an object achieved by constantly altering the strength of a magnetic field produced by electromagnets. In most cases the levitation effect is mostly due to permanent magnets; since they don't have any power dissipation, with electromagnets only used to stabilise the effect.
A charged body cannot rest in stable equilibrium when placed in a pure electrostatic field or magnetostatic field. In these kinds of fields an unstable equilibrium condition exists. Although static fields cannot give stability, EMS works by continually altering the current sent to electromagnets to change the strength of the magnetic field and allows a stable levitation to occur. Usually, a feedback loop which continuously adjusts one or more electromagnets to correct the object's motion is used to cancel the instability.
Many systems use magnetic attraction pulling upwards against gravity for these kinds of systems as this gives some inherent lateral stability, but some use a combination of magnetic attraction and magnetic repulsion to push upwards.
Magnetic levitation technology is important because it reduces energy consumption, largely obviating friction. The application of magnetic levitation is most commonly known for its role in Maglev trains.
Electrodynamic suspension (EDS) is a form of magnetic levitation in which there is relative motion between two objects that creates a repulsive magnetic fields to hold the two objects apart. In most cases, one magnetic field is a permanent field, such as a permanent magnet or a superconducting magnet, and the other magnetic field is induced from the changes of the field that occur as the magnet moves relative to a conductor in the other object. Electrodynamic suspension can also occur when an electromagnet driven by an AC electrical source produces the changing magnetic field.
EDS is used for maglev trains, such as the Japanese JR-Maglev. It is also used for some classes of magnetically levitated bearings.
Maglev Vehicle
Maglev (derived from magnetic levitation), is a system of transportation that suspends, guides and propels vehicles, predominantly trains, using magnetic levitation from a very large number of magnets for lift and
propulsion. This method has the potential to be faster, quieter and smoother than wheeled mass transit systems. The power needed for levitation is usually not a particularly large percentage of the overall consumption; most of the power used is needed to overcome air drag, as with any other high speed train.
The highest recorded speed of a Maglev train is 581 kilometres per hour (361 mph), achieved in Japan in 2003, only 6 kilometres per hour (3.7 mph) faster than the conventional TGV wheel-rail speed record.
The first commercial maglev people mover was simply called "MAGLEV" and officially opened in 1984 near Birmingham, England. It operated on an elevated 600-metre (2,000 ft) section of monorail track between Birmingham International Airport and Birmingham International railway station, running at speeds up to 42 km/h (26 mph); the system was eventually closed in 1995 due to reliability problems.
Perhaps the most well known implementation of high-speed maglev technology currently operating commercially is the Shanghai Maglev Train, an IOS (initial operating segment) demonstration line of the German-built Transrapid train in Shanghai, China that transports people 30 km (19 mi) to the airport in just 7 minutes 20 seconds, achieving a top speed of 431 km/h (268 mph), averaging 250 km/h (160 mph).
The Akashi Kaikyo Bridge, Japan
The Akashi-Kaikyō Bridge, also known as the Pearl Bridge, has the longest central span of any suspension bridge, at 1,991 metres (6,532 ft). It is located in Japan and was completed in 1998. The bridge links the city of Kobe on the mainland of Honshū to Iwaya on Awaji Island by crossing the busy Akashi Strait. It carries part of the Honshū-Shikoku Highway. It is an Earthquake resistant bridge constructed using a unique hydraulic mechanism. The bridge is one of the key links of the Honshū-Shikoku Bridge Project, which created three routes across the Inland Sea.
The bridge has three spans. The central span is 1,991 m (6,532 ft), and the two other sections are each 960 m (3,150 ft). The bridge is 3,911 m (12,831 ft) long overall. The central span was originally only 1,990 m (6,529 ft), but the Kobe earthquake on January 17, 1995, moved the two towers sufficiently (only the towers had been erected at the time) so that it had to be increased by 1 m (3.3 ft).
The bridge was designed with a two-hinged stiffening girder system, allowing the structure to withstand winds of 286 kilometres per hour (178 mph), earthquakes measuring to 8.5 on the Richter scale, and harsh sea currents. The bridge also contains pendulums that are designed to operate at the resonance frequency of the bridge to damp forces. The two main supporting towers rise 298 m (978 ft) above sea level, and the bridge can expand because of heating up to 2 m (7 ft) over the course of a day. Each anchorage required 350,000 tonnes (340,000 LT; 390,000 ST) of concrete. The steel cables have 300,000 kilometres (190,000 mi) of wire: each cable is 112 centimetres (44 in) in diameter and contains 36,830 strands of wire.
The Akashi-Kaikyo bridge has a total of 1737 illumination lights: 1084 for the main cables, 116 for the main towers, 405 for the girders and 132 for the anchorages. On the main cables three high light discharged tubes are mounted in the colors red, green and blue. The RGB model and computer technology make for a variety of combinations. Currently, 28 patterns are used for occasions as national or regional holidays, memorial days or festivities.



