Category Science

Where is world’s Largest Solar Tree?

The largest solar tree in the world has been installed at the CSIR-CMERI Centre of Excellence for Farm Machinery in Ludhiana, Punjab.

A solar power tree is a device that is shaped like a tree with its steel branches holding the solar photovoltaic panels.

Just like a natural tree, the steel branches of the solar tree are arranged in such a fashion that every solar panel is properly exposed to the Sun. Moreover, the panels can be mechanically tilted east or west to derive maximum benefit of the Sun’s position. The height of the tree is about 9-10 metres. One tree can produce about 5kW of power.

One of the main hurdles in installing solar power plants is the lack of availability of large spaces. Often, farmers are reluctant to sacrifice their cultivable land for solar power production. But a solar tree with its vertically arranged branches, occupies only four sqft of area, leaving almost the entire land free for cultivation. The energy generated can be used to run pumps, e-tractors and tillers as a green alternative to diesel.

India’s first solar power tree was produced by Central Mechanical Engineering and Research Institute (CMERI), at Durgapur. The largest solar tree in the world has been installed at the CSIR-CMERI Centre of Excellence for Farm Machinery in Ludhiana. Its total solar PV panel surface area is 309.83 m2. CMERI hopes to install many such solar trees along highways and farmlands.

Picture Credit : Google 

What is the device of Ulta Chaata used for?

Ulta Chaata, a concave structure, collects rainwater in the monsoon and converts it into potable water. Find out how it’s done.

Ulta Chaata, as the name suggests, resembles an inverted umbrella. It is a large concave structure that collects rainwater in the monsoon and converts it into potable water, while the solar panels fitted alongside the canopy, produce energy in the dry season.

The rainwater collected in the bowl of the Chaata, trickles down the stalk to reach a filtering unit of activated carbon where it is cleared of impurities. A duster of ten or more Ulta Chaatas is connected to a common device where the water undergoes further filtration to remove microorganisms, making it fit for drinking. A single unit can harvest as much as 100,000 litres of water every year.

The solar energy harnessed in the dry season is stored in the battery and is used not just to light up the Chaata, but also the premises. Unlike a typical rainwater harvesting unit, Ulta Chaata’s attractive design lends itself well to the aesthetics of the surroundings, especially when lit up.

The device takes up to one sq. ft of area. Ulta Chaatas can be installed as sustainable workstations in open spaces. They can provide a green roof for reception areas, cafeterias, gazebos, car parks, bus stops and even railway stations.

Besides a number of corporates, Guntakal railway station in Andhra  Pradesh has installed six such structures on its premises.

Ulta Chaata is the brainchild of a Mumbai-based environmentally conscious couple Priya Vakil and Samit Choksy whose start-up ThinkPhi designs sustainable products.

Ulta Chaatas can be installed as sustainable workstations in open spaces. They can provide a green roof for reception areas, cafeterias, car parks, bus stops and even railway stations.

QUICK FACTS

  • A single unit of Ulta Chaata can harvest as much as 100,000. litres of water every year.
  •  Ulta Chaata’s attractive design lends itself to the aesthetics of the surroundings.
  • The solar panels fitted alongside the canopy produce energy in the dry season.

Picture Credit : Google 

A black hole in Earth’s backyard?

This new black hole is 1.600 light-years away in the constellation Ophiuchus So far scientists have discovered 20 black holes in the Milky Way. About 100 million more are estimated to be present in our galaxy.

A new black hole has been discovered very near to Earth, closer than any other previously found. Christened Gaia BH1, this dormant blackhole is 1.600 light-years away in the constellation Ophiuchus.

This new black hole is ten times as massive as our sun. To date, scientists have found 20 black holes in the Milky Way galaxy whilst 100 million more are estimated to be present in our galaxy. The newly discovered one is three times closer than the earlier black hole which sat about 3,000 light-years away in the constellation Monoceros.

Since there are more undetected black holes, even this newly discovered one wouldn’t hold its spot of “closest to Earth” for too long.

The discovery was mentioned in a paper in the peer-reviewed Monthly Notices of the Royal Astronomical Society. The black hole was discovered by “Kareem El-Badry, an astrophysicist at the Harvard-Smithsonian Center for Astrophysics and his colleagues.

They found evidence of the existence of this dormant black hole using the data from the European Space Agency’s GAIA (Global Astrometric Interferometer for Astrophysics) spacecraft. After they noticed a star in the constellation Ophiuchus moving in unexpected ways, they understood that it was a result of the gravity of an unknown, massive object. Using the observation from other telescopes, they confirmed that the object causing this was a black hole.

What is a Black Hole

A black hole is a celestial body that has an immensely huge gravitational pull, so huge that nothing escapes it. Not even light can escape i it!

The black hole grows by accumulating matter that falls in it. Black holes are formed at the end of the life of a big star. When a massive star collapses after its nuclear fuel depletes, it will collapse onto itself and become a black hole.

It was in 2019 that an image of a black hole was captured for the first time. It was an international collaboration and the astronomers used the Event Horizon Telescope (EHT), networking eight ground-based radio telescopes.

Picture Credit : Google 

Which bird has the longest wingspan?

The wandering albatross that glides above the sea for hours without flapping its wings has the longest wingspan of any living bird. Its wingspan ranges from 2.51 to 3.5 metres. These birds use their large wings to ride the sea winds and spend most of their lives out in the open sea. They are so efficient at flying that it takes them more energy to sit on a nest than fly!

Albatrosses are a pelagic species, which means they inhabit the open seas. They are found in all oceans except the North Atlantic. They breed on remote islands on the north of the Antarctic Circle, and travel thousands of kilometres from their breeding ground when it is not breeding season. They sometimes cross the equator as well. These birds can fly up to 40 kilometres per hour.

Albatrosses feed during the night, alone or in small groups, making shallow dives while hunting. They mostly consume small fish and crustaceans. They also follow fishing boats and ships to feed on discards and garbage. Albatrosses often overdo their hunting and end up eating so much that they are unable to fly and have to float on the water!

These birds come together in large colonies on remote islands and build their nests from mud and grass. An egg is produced by the female, which gets incubated by the pair in turns. The egg hatches after around 11 weeks, and once the chick is born, the parents take turns to hunt, while the other stays in the nest to take care of the chick. Albatrosses don’t have many predators owing to their large size, but they are listed as vulnerable due to increasing pollution, which makes it difficult for them to find food.

Picture Credit : Google

What’s next in the smart ecosystem?

While many facets of life already have a smart counterpart, colour-changing fibres could be a gamechanger in the wearables market.

We live in a world of smart devices. It wasn’t always the case though. There’s been an eruption of sorts in the last couple of decades as there is an attempt to make every conceivable device now into a smart gadget.

It all started with the proliferation of smartphones. With each of us holding onto one of these almost all the time, it was a matter of time before the manufacturers wanted to put more smart gadgets in our control.

It was in such a climate that household appliances such as televisions, refrigerators, and even washing machines started becoming smarter. With smart bulbs, speakers, and devices to control the entire ecosystem, many facets of life now have a smart counterpart.

Colour-changing fibres

If you had ever wondered what could be next in the smart ecosystem, you might be surprised to know the answer. Researchers from the University of Luxembourg have come up with colour-changing fibres that could well pave the way for… you guessed it, smart clothes! Their results were published in Nature Materials in September 2022.

Up until now, clothing has mainly been about covering our body, protecting it from the environment, and maybe even flaunting our style. The future, however, could see clothing become part of the wearable technology bandwagon.

Remains mechanoresponsive

The researchers used Cholesteric Liquid Crystal Elastomer (CLCE), a structurally coloured polymer system that is capable of changing its colour by mechanical deformation. They then developed a simple, scalable method of creating colour-changing CLCE fibres that can be sewn into the fabric easily. The colour of fibres spanned the entire visible colour spectrum and showed excellent mechanochromic response- changing colour continuously and reversibly upon stretching or other mechanical movements.

The team were able to demonstrate the robustness of the CLCE fibres in garments by subjecting it to repeated stretching, machine washing, and abrasion. In addition to its ability to survive long-term use, the fact that it can be woven or sewn into elastic garments, and that it might not impair user comfort, implies that these can be used as smart textiles.

Apart from numerous applications in wearable technology, innovative fashion, and artistic applications, the researchers believe that it might be particularly useful in sports clothing and wearable robotics. It might even come in handy in non-wearable contexts too, in terms of strain sensing (think ropes incorporated with these fibres) and deformation detection. Becoming mainstream might be some distance in the future, by which time “dressing smart might take a whole new meaning.

Picture Credit : Google 

What causes negative human-wildlife interactions?

Recently, a tiger was shot dead in Bihars Champaran region, after it is said to have claimed the lives of at least nine people. Such instances of negative human-wildlife interactions are neither rare not new. In fact, they are increasing, and at an alarming rate. But, what triggers it? Is there a way to effectively manage this global concern? Let’s find out.

While several reasons can be attributed to such interactions, at the heart of the problem lies human population growth. Our planet has only a finite space to be occupied or used by a growing number of humans. So, forests are constantly cleared to either house us, grow our food, or build factories to meet our lifestyle demands. Which leaves wildlife with lesser and lesser space to live. In addition, we also come up with development projects – such as building bridges or laying railway lines- that cut through natural wildlife habitats. Whatever little space they have is further fragmented, causing animals to come into close contact with humans, an extremely uncomfortable situation for both sides. Apart from this, climate change-related consequences such as floods, draught, wildfires, etc. too displace wildlife, pushing them into human habitations in search of food, water, and shelter. Curious and careless tourists venturing too close for wildlife comfort or feeding them bring about negative interactions when there exists none.

How do they affect wildlife?

The worst outcome of negative interactions is the death of the animal. The death can happen unintentionally (knocked down by vehicles) or the animal can be killed as a matter of precaution as in the case of the Bihar tiger killing or as an act of revenge by angry humans. When forest areas shrink, it gives poachers and hunters that much more access to wildlife, increasing the number of animal lives lost. If animals are injured severely, they may perish without treatment. If such animals are parents to young ones, the offspring could die too-one injury eroding an entire generation of wildlife. All these could mean the eventual loss of the species as a whole. When key species disappear, they have the potential to trigger an entire ecosystem collapse.

How do they affect humans?

As with wildlife, negative interactions could be fatal for humans too. Even in cases where it is not fatal, it can be negatively life-changing. Injuries can lead to temporary or permanent disability. In some cases, this can mean the loss of livelihood or job. In addition, the survivors might grapple with monetary deficit to foot medical bills for their treatment. Among those who both lose their jobs and tackle mounting medical bills, the pressure could spill over to the rest of the family, where young people are forced to quit their education and find a job to support the family-spelling an end to their dreams. Not in all instances are humans affected directly. Large predators could kill or injure livestock, hungry elephants could damage houses and plunder crops, etc. For a family dependent on livestock and crops for income, this could mean monetary loss, apart from a life of constant fear and the inability to leave whatever property they own. Living in a region teeming with predators could hamper the mobility of inhabitants, including children for whom it may not be safe to play outside after sunset or travel between home and school through dense forests.

How can they be handled?

One of the significant ways to avoid or tackle such interactions is to look for beneficial co-existence. Invariably, humans caught in this issue are economically weak. So, when there’s loss of human or livestock life or injury, or damage of property, fair compensation to those affected may go a long way in stopping revenge killing. Regular awareness campaigns on the vital role of wildlife in this world and the need to protect them, especially endangered ones, can result in community-led conservation initiatives. Further, crops can be raised to serve as a buffer where human habitation exists on forest fringes. Technology – such as warning systems, sirens, lights, etc. to keep off animals without harm- can be put to good use. It is equally important to create clear boundaries of protected areas and have strict laws in place to prevent infrastructure development, encroachment, poaching, and hunting. More than anything, it is crucial to understand that since the nature of each issue is different, the solutions should be too.

A WIN-WIN SOLUTION

For more than two decades, Ladakh-based Snow Leopard Conservancy India Trust, as the name suggests, has worked holistically towards protecting the species, its prey, and habitat. As part of this effort, it has been conducting research too. But one of its most significant initiatives is the community-based conservation.

Decades ago, when snow leopards in the region ventured into human habitation and helped themselves to livestock, an important source of income/sustenance for the villagers, some carnivores had lost their lives to revenge killing by angry humans. The Trust understood that it was important for the locals to be part of the big cat protection efforts because both humans and the wildlife shared the resources available in the region. So, the Trust helped convert many village homes to homestays that promised eager tourists a chance at spotting the elusive animal. Soon, the villagers realised a snow leopard alive was worth more than one that’s dead! Today, they are active participants in the conservation programmes.

The Trust also educates adults and children on the rich biodiversity of the region, its significance, and the need to protect them, making it one of the most heart-warming conservation stories.

Picture Credit : Google