₦airaland Forum

I have seen the video nah. Abi them nurse the video?

Tell us

Nigeria my country.

no one knows what would be in vogue in the future. lets just wait and see. new technologies may arise and everything we know today may go extinct

illiterates.


We are in trouble.
A country led by dumb fellows cannot progress.

nice car.

this man is really into cars.


call me for installation of stamped concrete and landscaping

Hmm!



Call 08136276104 for professional installation of stamped concrete and landscaping

the mama fine pass am

Prepare the meter

Table can still turn oooo! No too shout first o!

This marriage is risky

the effects of propaganda doesn't last long

Oshiomole is a good illustration for the saying
Power corrupts, and absolute power corrupts absolutely.


Check my signature !!

Na so



Check my signature ......

Hmm! op is making it look as if its the student that caused the madness

New Way to Generate Electricity From Rain Can Power 100 LED Bulbs Per Drop


Tapping into the water cycle and generating electricity from rainy days could be one way to grow our renewable energy use.

Until now, scientists have been unable to get water droplets to produce a significant amount of power - but we may finally have a breakthrough.

While we're still a long way from umbrellas that double up as generators, the latest approach shows there might be a way to get power from rain showers at a level of efficiency that makes these systems practical.

New research has found a method that could generate enough power from a single droplet of rain to light up 100 LED bulbs. That's a big jump forward in efficiency, in the region of several thousand times.

"Our research shows that a drop of 100 microlitres of water released from a height of 15 centimetres [5.9 inches] can generate a voltage of over 140V, and the power generated can light up 100 small LED lights," says biomedical engineer Wang Zuankai from the City University of Hong Kong (CityU).

That sounds like a surprising amount of voltage, but the engineers used some ingenious tricks to make it happen.

Scientists have been looking into this type of power production for years, but the physics of converting the energy of raindrops into electricity are much harder to do than harvesting the energy from a rising tide or a flowing stream.

One of the improvements the team built into their droplet-based electricity generator (DEG) was the use of a polytetrafluoroethylene or PTFE film, which is able to accumulate a surface charge as it's continuously hit by water droplets, until it gradually reaches saturation.

The team found that as water droplets hit the surface and spread out, the drops act as a 'bridge' that connects two electrodes: an aluminium electrode and an indium tin oxide (ITO) electrode (with the PTFE on top).

rain 2(Wanghuai et al., Nature, 2020)

The droplet bridge in turn creates a closed-loop surface so that all of the collected energy can be released – droplets act as resistors, and the surface coating acts as a capacitor.

This approach could eventually be applied anywhere that water hits a solid surface, the researchers say – the hull of a boat, the inside of a water bottle, or the top of an umbrella.

"The significance of this technology is the much enhanced electric power per falling rain droplet, which makes the device much more efficient to convert energy from a falling droplet to electricity," chemist Xiao Cheng Zeng, from the University of Nebraska-Lincoln, told Sarah Wells at Vice.

There's plenty of work still to do to get this ready for practical use however, with the researchers hoping to have a prototype ready in the next five years.

DAVID NIELD
16 FEB 2020

https://www.sciencealert.com/we-re-getting-closer-to-generating-electricity-from-raindrops

HOW STAMPED CONCRETE BEGAN
With origins dating back to ancient times, modern concrete and its main ingredient, i.e. cement, has been significantly modified over time. This remarkable material was used by the Romans and Greeks some 2,000 years ago – who used volcanic ash and lime, which, when mixed with water, formed a hard mass.
Stamped concrete is concrete that is patterned and/or textured or embossed to look like brick, slate, flagstone, stone, tile, wood, and various other patterns and textures. Stamped concrete is commonly used for patios, sidewalks, driveways, pool decks, and interior flooring. The ability of stamped concrete to resemble other building materials makes stamped concrete a less expensive alternative to using those other authentic materials such as stone, slate or brick.
There are three procedures used in stamped concrete which separate it from other concrete procedures; the addition of a base color, the addition of an accent color, and stamping a pattern into the concrete. These three procedures provide stamped concrete with a color and shape similar to the natural building material. It also is longer-lasting than paved stone, and still resembles the look.

HISTORY OF STAMPED CONCRETE
Between 1890 and 1920, concrete manufacturers started producing innovative building facades. Among these were pre-cast builders, who used colors and stains to enhance the look of plain concrete.
While some manufacturers chose to mix pigments into fresh concrete for casting, others simply dunked the entire casting into solutions that were similar to chemical stains.
Concrete craftsmen also started blending pigments to add color to plain concrete. Some even maintained recipe files to mix and create various colors.
The introduction of colored concrete highlighted the need to produce it in batches. Contractors wanted a mixture that would not only mix evenly with concrete, but also form a permanent bond in cement paste, for a long lasting finish.
Around 70 years ago, Brad Bowman, now known as the father of stamped concrete, introduced texture and embossing to the world of decorative concrete. This meant that plain concrete could be made to resemble brick, slate, flagstone, wood, tiles, etc. He developed, and patented, the tools and procedures required to create various stamping designs. The best part of his creation was that people could easily customize it to their specifications.
The demand for stamped concrete grew exponentially in the 1970s; ever since, it has become a common material that architects, designers, and contractors use in most of their projects. The Bomanite Corp., using Bowman’s patents, franchised his tools to make decorative concrete for contractors across the country. This further promoted the use of decorative concrete in building projects.
With time, different designs of decorative concrete started flooding the market, at attractive prices. The variety of designs and colors available – from acid and transparent stains to high-quality dyes – pretty much took the world by storm. The best part was that, this type of decorative concrete was not only attractive, but also more durable.
Stamped designs are now commonly used for patios, sidewalks, driveways, pool decks, and even interior flooring. The main reason behind its success is the ease in crafting delicate designs, and its affordability.


History of stamped concrete in Nigeria
In Nigeria, stamped concrete is just becoming popular now. About ten years ago, it was exclusively for the rich due to the cost involved in installing it. As more Nigerian companies invest in production of stamped concrete materials, the cost has reduced considerably.
Sealers, Release agents and Color hardeners are now produced in Nigeria. The quality of the made in Nigeria materials are surprisingly similar and in some cases even better than the imported ones.
Decorative concrete systems produce a range of materials and chemicals for stamped concrete like: Color hardeners, release agents, acid stains and sealers.




https://www.youtube.com/watch?v=FIJBWbnFV3A

click on the link on my signature to see more pictures

Stamped concrete


https://www.youtube.com/watch?v=FIJBWbnFV3A

They also remixed Davido's if