Archive for the ‘Engineering’ Category
It has been achieved a new record of efficiency in generation of photovoltaic electricity with a prototype solar cell that could be manufactured at low cost in large quantities using conventional industrial processes.
Produced cheaply roller blades solar cells, a plastic and can be incorporated into the exterior of buildings, cars and even personal accessories such as backpacks and jackets and technologically feasible, but so far, these photovoltaic laminates had been able to generate enough electricity per square centimeter to attract commercial interest. Read the rest of this entry »
A team of MIT researchers has developed a new imaging system that you can get visual data at a speed of no less than a trillion (a trillion) of frames per second.
This is sufficient to produce a video in slow motion in which the human eye can appreciate the movement of a flash of light moving from one end to the other inside a one liter bottle, bouncing and reflecting on the cap to the bottom of the bottle.
Andreas Velten, one of the designers of the system, believes that there is nothing in the universe that is too fast to keep this camera captures the movement in question. Read the rest of this entry »
Electric cigarette are smokeless, and some also call it smokeless cigarettes. The e-cigarette in contrast to the traditional burning cigarette (you know the drill: tobacco + Fire => Smoke) – Let off steam, because nothing is burning. Therefore, the User by e-cigarette (or by e-cigars and e-pipes) spared from carbon monoxide, tar and more than 60 cancer-causing additives. The nicotine is highly toxic to him here by alternative methods of helping.
The e-cigarette consists of three main parts. The replaceable battery provides the energy required from the evaporator. Depending on the model of the liquid (liquid, “Juice”) in the cartridge (depot, cartridge) vaporized by heat or ultrasound. The liquid is often based on propylene glycol and contains the flavor and nicotine. For all electronic cigarette reviews electronic cigarette comparison is a nice site that you may visit.
Components of the e-cigarette:When sucking on the mouthpiece (custodian), the control electronics, a piezoelectric element to vibrate offset so that the atomized liquid carrier and a slightly heated aerosol is generated. Only lasts as long as the resulting negative pressure by the suction, the battery power is removed, which ensures a long operating life and corresponds to approximately one pack of cigarettes. Of course, the battery can be recharged with an external charger.
Depending on the size and model of the e-cigarette are the replaceable cartridge (or tank) 60-30 conventional cigarettes.
A team of researchers from the University of Washington and Aalto University (Finland) has developed a prototype contact lens that will receive information from computers, such as emails and texts directly in the eye and vision enhance computer-generated images, the style of the film Terminator.
The new bionic lens allows you to collect computerized information and project it directly into the eyes. Among future applications include devices for computer games, leading to virtual reality to a new dimension, and advanced browsers.
“It could also have medical applications such as biosensors connection to provide information on levels of glucose and lactose”, says Babak Parviz, University of Washington, one of the principal investigators of the study. Read the rest of this entry »
They have successfully developed a method that improves the qualities of rechargeable batteries based on sodium ions. These batteries could be a cheaper alternative for applications that require high power, such as storing energy in the electricity grid.
To connect to the mains sources of solar and wind power, network managers need batteries that can store large amounts of energy generated by these sources. Rechargeable lithium-ion, common in consumer electronics and electric vehicles, work well but are too expensive for large-scale use in the electricity grid, because they need lots of batteries and very large sizes.
Sodium is the next best option, but the sodium-sulfur batteries currently in use operate at temperatures above 300 degrees Fahrenheit, or three times the temperature at which water boils, and that makes them less energy efficient and more dangerous than the batteries that operate at room temperature. Read the rest of this entry »
Plastic bushings are needed for all different types of engineering applications, especially high voltage equipment, for example, transformers and circuit breakers. This particular device is a hollow insulating liner that has a donut-like shape and is used to line an opening between two parts, preventing abrasion to any cable or wires that may be passing through the opening. Aside from plastic, bushings may also be made of metal. The type that is used by an engineer may depend on preference or the type of application for which the mechanism is needed.
The following are some of the more notable and impressive characteristics of plastic bearings:
- Outstanding resistance to wear
- Low coefficient of friction
- Capable of handling high loads
- High dimensional stability
- Exceptional resistance to chemicals
- Resistant to corrosion
- Low moisture absorption
- Etc.
In many practical applications using lasers is important to control the direction of the beams. It has recently introduced a way of guiding the laser beams is necessary, relatively inexpensive and very efficient in terms of energy consumption.
In many cases, it is much easier to redirect a laser beam at a target, guiding the whole laser projector in the exact direction.
The team of Michael Escuti of State University of North Carolina has developed a way to do this with due efficiency and without moving anything.
He has also managed to implement the ability to guide the beams in a wide range of angles, which is essential for practical applications. Read the rest of this entry »
It has taken an important step toward creating soft and flexible electric generators of low cost and good efficiency.
These devices could produce electricity when they are bent and stretched, for example by being rocked by the waves or even the breeze as if they were tree leaves.
The team of Thomas McKay from Biomimetics Laboratory of the Institute of Bioengineering, Auckland, New Zealand, has developed a cheaper electricity generator with a surprising combination of qualities: it is soft, flexible, and weighs very little. Read the rest of this entry »
They have developed a new and marvelous battery that has for the cathode a special nanostructure, which allow a loading process and download much faster without sacrificing the ability of energy storage.
The new battery thus combines the qualities of a battery with a capacitor.
Most of the capacitors stored very little energy. May release very quickly but can not save much. Most batteries store a reasonably large amount of energy. But they can not release or absorb it quickly. The new battery does both.
The achievement is the work of Paul Braun, Xindi Yu and Huigang Zhang, all three of the University of Illinois. Read the rest of this entry »
Speaking of heavy machinery refers to a complex machine, besides doing their own work, a series of simple machine operations at the same time. The need for heavy machinery is due to the fact that heavy and complicated activities such as the laying of roads, tilling and sowing seeds equidistantly spread over a large area of agricultural fields ready for the start of agricultural activities can not be done with the help of simple machines, nor the work force is capable of performing complex and heavy activities at a relatively fast. The heavy machinery meets the requirement of completing complex jobs at a relatively faster pace and considerable savings in the amount of overhead.
That is why today the machines are an important guideline of construction and delivery time, reducing:
- Labor
- Runtime