💥Join UPSC 2027,2028 Mentorship (August Batch) + XFactor Notes & Microthemes PDF
Talk to Mentor

Civilsdaily

Login

Subject: Science and Technology

  • NASA’s Sonification Project

    While telescopes offer glimpses of outer space by translating digital data into stunning images, NASA’s Chandra X-Ray Center (CXC) has gone a step further by unveiling a new ‘sonification’ project that transforms data from astronomical images into audio.

    Don’t get confused with the ‘Chandra‘ considering it as an ISRO Project.

    What is the project?

    • Users can now ‘listen’ to images of the Galactic Centre, the remains of a supernova called Cassiopeia A, as well as the Pillars of Creation Nebula, which are all located in a region around 26,000 light-years away from Earth.
    • The data has been collected by NASA’s Chandra X-Ray Observatory, Hubble Space Telescope and Spitzer Space Telescope — each of which is represented by a different musical ‘instrument’.

    What is data sonification?

    • Data sonification refers to the use of sound values to represent real data. Simply put, it is the auditory version of data visualization.
    • In NASA’s recent Chandra project, for instance, data is represented using a number of musical notes.
    • With this data sonification project, users can now experience different phenomena captured in astronomical images as an aural experience.
    • The birth of a star, a cloud of dust or even a black hole can now be ‘heard’ as a high or low pitched sound.

    How did NASA translate astronomical images into sound?

    • NASA’s distant telescopes in space collect inherently digital data, in the form of ones and zeroes, before converting them into images.
    • The images are essentially visual representations of light and radiation of different wavelengths in space, that can’t be seen by the human eye.
    • The Chandra project has created a celestial concert of sorts by translating the same data into sound. Pitch and volume are used to denote the brightness and position of a celestial object or phenomenon.
    • So far, the astronomers behind Project Chandra have released three examples made using data collected from some of the most distinct features in the sky — the Galactic Centre, Cassiopeia A, and Pillars of Creation Nebula.

    (1) The Galactic Centre

    • The first example is that of the Galactic Centre, which the rotational centre of the Milky Way galaxy is.
    • It comprises a collection of celestial objects — neutron and white dwarf stars, clouds of dust and gas, and most notably, a supermassive black hole called Sagittarius A*, that weighs four million times the mass of the sun.
    • Based on data gathered by the Chandra X-ray Observatory, and the Hubble and Spitzer Space Telescopes, an image is rendered using X-ray, visible and infrared light before being translated into sound.
    • The translation begins on the left side of the image and then moves to the right.
    • Stars and other compact sources are represented using individual short notes, while a longer humming sound is used to denote clouds of gas and dust.

    (2) Cassiopeia A

    • Located around 11,000 light-years away from Earth in the northern Cassiopeia constellation, Cassiopeia A is one of the most well-known remnants of a once-massive star that was destroyed by a supernova explosion around 325 years ago.
    • The image shows the supernova remnant as a ball of different coloured filaments.
    • Each colour represents a particular element — red is used for silicon, yellow for sulfur, purple denotes iron, while green is used for calcium. Each of these filaments is also assigned its own unique sound.
    • Unlike with the sonification of the Galactic Centre, where the translation plays from left to right, here the sounds move outwards from the centre of the circular structure.

    (3) The Pillars of Creation

    • The iconic Pillars of Creation is located in the centre of the Eagle Nebula, which is also known as Messier 16.
    • The Hubble Star Telescope was used for images of the celestial structure, which comprises wispy towers of cosmic dust and gas.
    • Here too, different colours are used to represent elements — blue for oxygen, red for sulphur and green for both nitrogen and hydrogen.
    • Like with the Galactic Centre, this sound translation also plays from left to right. However, the sound has an eerie effect, with sharp whistles representing stars and low howls indicating the presence of gas clouds.

    Significance of the project

    • The sonification project aims to “incorporate NASA science content into the learning environment effectively and efficiently for learners of all ages”.
    • Over the years, NASA has been working towards making data about space accessible for a larger audience.
    • The projects like this allow audiences — including visually-impaired communities — to experience space through data.

    Back2Basics: Chandra X-Ray Observatory

    • The Chandra X-ray Observatory (CXO) is a Flagship-class space telescope launched aboard the Space Shuttle Columbia during STS-93 by NASA on July 23, 1999.
    • Chandra is sensitive to X-ray sources 100 times fainter than any previous X-ray telescope, enabled by the high angular resolution of its mirrors.
    • Since the Earth’s atmosphere absorbs the vast majority of X-rays, they are not detectable from Earth-based telescopes; therefore space-based telescopes are required to make these observations.
    • Chandra is an Earth satellite in a 64-hour orbit, and its mission is ongoing as of 2020.
    • The telescope is named after the Nobel Prize-winning Indian astrophysicist Subrahmanyan Chandrasekhar.

  • Ocean Services, Modelling, Applications, Resources and Technology (O-SMART) SCHEME

    The Union Ministry of Earth Sciences has informed about the progress of O-SMART Scheme.

    Do you know?

    India’s ambitious Deep Ocean Mission is an umbrella scheme under O-SMART initiative. Bottom of Form

    O-SMART Scheme

    • The services rendered under the O-SMART will provide economic benefits to a number of user communities in the coastal and ocean sectors, namely, fisheries, offshore industry, coastal states, Defence, Shipping, Ports etc.
    • It seeks to address issues relating to SDG-14, which aims to conserve the use of oceans, marine resources for sustainable development.
    • It also provides the necessary scientific and technological background required for the implementation of various aspects of Blue Economy.
    • The State of Art Early Warning Systems established Scheme will help in effectively dealing with ocean disasters like Tsunami, storm surges.
    • The technologies being developed will help in harnessing the vast ocean resources of both living and non-living resources from the seas around India.
    • A fleet of research vessels viz., Technology Demonstration vessel SagarNidhi, Oceanographic Research Vessel SagarKanya, Fisheries and Oceanographic Research Vessel SagarSampada and Coastal Research Vessel SagarPurvi have been acquired to provide required research support.

    Some of the modified objective

    The objectives of O-SMART are:

    • To generate and regularly update information on Marine Living Resources and their relationship with the physical environment in the Indian Exclusive Economic Zone (EEZ),
    • To periodically monitor levels of seawater pollutants for health assessment of coastal waters of India, to develop shoreline change maps for assessment of coastal erosion due to natural and anthropogenic activities,
    • To develop a wide range of state-of-the-art ocean observation systems for the acquisition of real-time data from the seas around India,
    • To generate and disseminate a suite of user-oriented ocean information, advisories, warnings, data and data products for the benefit of society,
    • To develop high-resolution models for ocean forecast and reanalysis system,
    • To develop algorithms for validation of satellite data for coastal research and to monitor changes in the coastal research,
    • Acquisition of 2 Coastal Research Vessels (CRVs) as replacement of 2 old CRVs for coastal pollution monitoring, testing of various underwater components and technology demonstration,
    • To carry out exploration of Polymetallic Nodules (MPN) from a water depth of 5500 m in the site of 75000 sq.km allotted to India by United Nations in Central Indian Ocean Basin, to carry out investigations of gas hydrates,
    • Exploration of polymetallic sulphides near Rodrigues Triple junction in 10000 sq. km of the area allotted to India in International waters by International Seabed Authority/UN and,
    • Submission of India’s claim over continental shelf extending beyond the Exclusive Economic Zone supported by scientific data, and Topographic survey of EEZ of India.

    Also read:

    https://www.civilsdaily.com/news/explained-indias-deep-ocean-mission/

  • Brucellosis: A bacterial disease

    As the novel coronavirus pandemic continues, the health commission has announced this week that a leak in a biopharmaceutical company last year caused an outbreak of brucellosis disease.

    Try this PYQ:

    Q.Consider the following kinds of organisms:

    1. Bacteria
    2. Fungi
    3. Flowering plants

    Some species of which of the above kinds of organisms are employed as bio-pesticides?

    (a) 1 only

    (b) 2 and 3 only

    (c) 1 and 3 only

    (d) 1, 2 and 3

    What is Brucellosis?

    • Brucellosis is a bacterial disease that mainly infects cattle, swine, goats, sheep and dogs.
    • Humans can get infected if they come in direct contact with infected animals or by eating or drinking contaminated animal products or by inhaling airborne agents.
    • According to the WHO, most cases of the disease are caused by ingesting unpasteurized milk or cheese from infected goats or sheep.
    • Symptoms of the disease include fever, sweats, malaise, anorexia, and headache and muscle pain.
    • While some signs and symptoms can last for long periods of time, others may never go away. Human to human transmission of the virus is rare.
    • These include recurrent fevers, arthritis, swelling of the testicles and scrotum area, swelling of the heart, neurologic symptoms, chronic fatigue, depression and swelling of the liver or spleen.

  • Social media and dilemmas associated with it

    Internet has transformed our life like no other technologies. However, it has created several problems as well. The article analyses such issues.

    Examining the role of social media

    • The first reason for the examination of role is the impending US presidential election.
    • Ghosts of Cambridge Analytica, are returning to haunt us again.
    • The second reason is the COVID pandemic.
    • Social media has emerged as a force for good, with effective communication and lockdown entertainment, but also for evil, being used effectively by anti-vaxxers and the #Unmask movement to proselytize their dangerous agenda.

    Understanding the problems associated with social media

    • The big problem with social networks is their business model.
    • The internet was created as a distributed set of computers communicating with one another, and sharing the load of managing the network.
    • This was Web 1.0, and it worked very well. But it had one big problem—there was no way to make money off it.
    •  The internet got monetized, Web 2.0 was born.
    • Come 2020, search and social media advertising has crossed $200 billion, rocketing past print at $65 billion, and TV at $180 billion.
    • This business model has led to a “winner-takes-all” industry structure, creating natural monopolies and centralizing the once-decentralized internet.
    • The emergence of Web 3.0, a revolution that promises to return the internet to users.

    Way forward

    • One principle of the new model is to allow users explicit control of their data, an initiative aided by Europe-like data protection regulation.
    • Another is to grant creators of content—artists, musicians, photographers, —a portion of revenues, instead of platforms taking it all (or most).
    • The technologies that Web 3.0 leverages are newer ones, like blockchains, which are inherently decentralized.
    • They have technology protection against the accumulation of power and data in the hands of a few.
    • Digital currencies enabled by these technologies offer a business model of users paying for services and content with micro-transactions, as an alternative to advertiser-pays.

    Conclusion

    The path to success for these new kinds of democratic networks will be arduous. But a revolution has begun, and it is our revulsion of current models that could relieve us of our social dilemmas.

  • Explained: Solar Cycle 25

    NASA and the National Oceanic and Atmospheric Administration (NOAA) has announced the commencement of solar cycle 25.

    Try this PYQ:

    Q. Which one of the following reflects back more sunlight as compared to the other three?

    (a) Sand desert

    (b) Paddy cropland

    (c) Land covered with fresh snow

    (d) Prairie land

    What is the Solar Cycle?

    • Like seasons on Earth, the Sun follows a cycle of 11 years, during which solar activities fluctuate between solar minima and maxima.
    • Depending on the number of sunspots detected on the Sun, scientists term it is as solar maxima (highest number of sunspots) or solar minima (lowest number of sunspots).
    • Sunspots are small and dark, yet cooler areas formed on the solar surface, where there are strong magnetic forces.
    • They start appearing at Sun’s higher latitudes and later shift towards the equator as a cycle progresses.
    • In short, when the Sun is active, there are more sunspots in comparison to fewer sunspots during the lesser active phase.
    • Maxima or minima is not a specific time in the 11-year cycle but is a period that can last for a few years.

    How are solar cycles determined?

    • One of the important elements researchers look out for on the Sun’s surface is the number of sunspots.
    • A new cycle commences when the Sun has reached its lowest possible minima phase.
    • Every time the cycle changes, the Sun’s magnetic poles reverse.

    Monitoring solar cycles

    • Since the Sun is a highly variable star, data of sunspot formation and its progress need close monitoring.
    • Data of six to eight months are required to confirm whether the star has undergone a minima phase.
    • Traditionally, telescopes were used to record sunspots and recorded data since 1755 is available.
    • With the advance in technology in recent decades, satellites are also used to make real-time sunspot observations.
    • On this basis, scientists announced the completion of solar cycle 24, which lasted between December 2008 and December 2019.
    • With the Sun’s activities having reached its lowest minima between the two cycles, the new solar cycle 25 has now commenced.

    How has the transition between solar cycles 24 and 25 been?

    • The Sun’s activities were notably lesser during 2019 and early 2020. There were no sunspots for 281 days in 2019 and 181 days in 2020.
    • Since December 2019, the solar activities have slowly picked up, corroborating the beginning of the news cycle.
    • The panel termed solar cycle 25 to be a weak one, with the intensity similar to that of Solar cycle 24.

    What solar activities affect us on Earth?

    • Solar activities include solar flares, solar energetic particles, high-speed solar wind and Coronal Mass Ejections (CME).
    • These influence the space weather which originates from the Sun.
    • Solar storms or flares can typically affect space-dependent operations like GPS, radio and satellite communications, besides hampering flight operations, power grids and space exploration programmes.
    • CMEs pose danger to space weather. Ejections travelling at a speed of 500km/second are common during solar peaks and create disturbances in Earth’s magnetosphere, the protective shield surrounding the planet.
    • At the time of spacewalks, astronauts face a great health risk posed by exposure to solar radiation outside Earth’s protective atmosphere.

     

  • Life signature on Venus

    Scientists have detected in the harshly acidic clouds of Venus a gas called phosphine that indicates microbes may inhabit Earth’s inhospitable neighbour, a sign of potential life beyond Earth.

    Try this PYQ:

    Q.Which phenomenon has Venusian winds rotating 60 times faster than the planet below on the dark side?

    (a) Super rotation

    (b) Monrotation

    (c) Dual rotation

    (d) Macrrotation

    Phosphine

    • Phosphine – a phosphorus atom with three hydrogen atoms attached – is highly toxic to people.
    • It is known to be produced only through a biological process, and not through any naturally occurring chemical process.
    • Phosphine was seen at 20 parts-per-billion in the Venusian atmosphere, a trace concentration.
    • Researchers examined potential non-biological sources such as volcanism, meteorites, lightning and various types of chemical reactions, but none appeared viable.
    • There are some other ways in which this chemical might be produced, for example, in the underbelly of volcanoes or meteorite activity, but that would have shown in much lower concentrations.

    Why study Venus?

    • Venus is Earth’s closest planetary neighbour. Similar in structure but slightly smaller than Earth, it is the second planet from the sun. Earth is the third.
    • Venus is wrapped in a thick, toxic atmosphere that traps in heat. Surface temperatures reach a scorching 880 degrees Fahrenheit (471 degrees Celsius), hot enough to melt lead.
    • Existence of phosphine is the most credible evidence yet for the possibility of life away from Earth.

    Hosting life on Venus

    • There are several things that we know about Venus that make life, as we know it, unsustainable on that planet.
    • The temperature of Venus is too high, and its atmosphere is highly acidic, just two of the things that would make life impossible.
    • It is too early to consider this as evidence for extraterrestrial life.

    Paving way for future mission

    • Missions to Venus are not new. The finding can further ignite interest in space missions to Venus.
    • Spacecraft have been going near the planet since the 1960s, and some of them have even made a landing.
    • In fact, the Indian Space Research Organisation (ISRO) is also planning a mission to Venus, tentatively called Shukrayaan, in the near future.
    • As of now, the plan is still on the drawing board. All future missions to Venus would now be attuned to investigating further evidence of the presence of life.

  • Panama Disease

    The scientists of Indian Council of Agriculture Research or ICAR have found a cure for one of the most dreaded diseases on Banana.

    Try this PYQ:

    Q.Recently, our scientists have discovered a new and distinct species of banana plant which attains a height of about 11 metres and has orange-coloured fruit pulp. In which part of India has it been discovered?

    (a) Andaman Islands

    (b) Anamalai Forests

    (c) Maikala Hills

    (d) Tropical rain forests of northeast

    Panama Disease

    • The fungal disease, called Fusarium Wilt, is popularly known as the ‘Panama Disease’ and afflicts banana plants.
    • For the first time, Indian scientists have brought out a biopesticide that can control the disease. This biopesticide has been made using another fungus.
    • For a long time, banana cultivators have been struggling with the Panama Disease.
    • This disease affects the Cavendish variety or the G9 Banana cultivar, which is the most widely grown banana in the world.

    Spread in India

    • In India, more than 60 per cent of bananas are of the G9 variety.
    • They go by names like ‘Grand Naine’, ‘Robusta’, ‘Bhusaval’, ‘Basrai’ and ‘Shrimanth’.
    • Farmers in at least four Indian states — Bihar, Gujarat, Madhya Pradesh and Uttar Pradesh — have been badly affected by this disease.
    • All these are areas where the Cavendish variety is grown.

    Why is the disease so deadly?

    • Panama Disease is caused by a fungus with a long and complicated name called Fusarium oxysporum f. Sp cubense.
    • One of its strains which is called ‘Tropical Race 4’ or ‘TR4’ is creating the most havoc, threatening almost 80 per cent of the global banana production.
    • The disease is so deadly that it is sometimes referred to as ‘banana cancer’.
    • The fungus resides below ground and infects the plant through its roots. The infection then stops water and essential nutrients from being transported to the rest of the plant.
    • The leaves begin to wilt, and the stem of the plant starts turning dark brownish before the plant dies. If one plant gets it, then it is most likely that an entire plantation can be wiped out.

  • Exploring the idea of blockchain voting

    The article analyses the pros and cons of the adoption of blockchain technology for remote voting.

    Background

    • The Election Commission of India has been exploring the idea of further digitising the electoral infrastructure of the country.
    • In furtherance of this, it explored the possibility of using blockchain technology for the purpose of enabling remote elections.

    What will be the benefits

    • ‘Remote voting’ would appear to benefit internal migrants and seasonal workers, who account for roughly 51 million of the populace (Census 2011).
    • The envisioned solution might also be useful for some remotely-stationed members of the Indian armed forces.

    Key issues

    • Electors would still have to physically reach a designated venue in order to cast their vote,
    • Digitisation and interconnectivity introduce additional points of failure external to the processes which exist in the present day.
    • Blockchain solutions rely heavily on the proper implementation of cryptographic protocols.
    • If security is breached, it could unmask the identity and voting preferences of electors, or worse yet, allow an individual to cast a vote as someone else.
    • The provisioning of a dedicated line may make the infrastructure less prone to outages, it may also make it increasingly prone to targeted Denial-of-Service attack.
    • Digitised systems may also stand to exclude and disenfranchise certain individuals due to flaws in interdependent platforms, flaws in system design, as well as general failures caused by external factors.

    Way forward

    • Political engagement could perhaps be improved by introducing and improving upon other methods, such as postal ballots or proxy voting.
    • Another proposed solution to this issue includes the creation of a ‘One Nation, One Voter ID’ system.

    Consider the question “What are the opportunities and challenges in the adoption of blockchain technology. Suggest the other alternatives to enable the ballot portability.”

    Conclusion

    Adoption of technology should be weighed against the risk it carries in the electoral process. While the adoption of blockchain technology offers many opportunities, the concerns it raises must be addressed before its adoption.

  • Analysing the impact of Bt cotton

    After almost 20 years of adoption of Bt cotton in India, its time to review the claimed benefits of the Bt.

    Hybrid cotton seeds and issues

    • Until the 20th century the indigenous ‘desi’ variety, Gossypium arboreum was used.
    • From the 1990s, hybrid varieties of G. hirsutum were promoted.
    • These hybrids cannot resist a variety of local pests and require more fertilizers and pesticides.
    • Cotton suffers from plenty of infestation from moth pests such as the Pink Bollworm (PBW) and sap-sucking (Hemipteran) pests such as aphids and mealy bugs.
    • With increasing pressure to buy hybrid seeds, the indigenous varieties have lost out over the years.

    Resistant pests and introduction of Bt cotton

    • The increasing use of synthetic man-made pesticides to control pests and the rising acreage under the American long-duration cotton led to the emergence of resistant pests.
    • Resistant Pink and even American Bollworm (ABW), a minor pest in the past, began increasing, leading to a growing use of a variety of pesticides.
    • Rising debts and reducing yields, coupled with increasing insect resistance, worsened the plight of cotton farmers.
    • It was in this setting that Bt cotton was introduced in India in 2002.

    What is Bt cotton

    • The plant containing the pesticide gene from the bacteria Bacillus thuringiensis (Bt), has been grown in India for about twenty years.
    • This pesticide, now produced in each Bt plant cell, ought to protect the plant from bollworm, thereby increasing yields and reducing insecticide spraying on the cotton plant.

    Review of the utility of Bt cotton

    • Review  was published in the scientific journal Nature Plants, analysing the entire picture of the use of Bt cotton in India.
    • Earlier studies had attributed to Bt the tripling of cotton yield between 2002-2014 in India.
    • However, one detail that raises concerns over such a conclusion was that yield differences between farmers who were the early adopters of Bt cotton and those who were not suffered from selection bias.
    • Controlling for such bias showed (in 2012) that the contribution of Bt cotton to yield increase was only about 4% each year.
    • Since yields vary annually by over 10%, the benefits claimed were dubious.
    • There are discrepancies between yield and the deployment of Bt cotton.
    • For instance, the Bt acreage was only 3.4% of the total cotton area in 2003, not sufficient to credit it for the 61% increase in yield in 2003-2004.
    • The rise in cotton yields can be explained by improvements in irrigation, for instance in Gujarat, and a dramatic growth across the country in the use of fertilizers.
    • The PBW developed a resistance by 2009 in India. In a few years, the situation was dreadful.
    • A technology that works in the lab may fail in fields since real-world success hinges on multiple factors.

    Way forward

    • The cost of ignoring ‘desi’ varieties for decades has been high for India.
    • Research suggests that with pure-line cotton varieties, high density planting, and short season plants, cotton yields in India can be good and stand a better chance at withstanding the vagaries of climate change.
    •  But government backing for resources, infrastructure and seeds is essential.

    Conclusion

    It is time to pay attention to science and acknowledge that Bt cotton has failed in India, and not enter into further misadventures with other Bt crops such as brinjal or herbicide resistance.

  • [pib] Heritage of Punjab

    The Ministry of Tourism’s DekhoApnaDesh Webinar series titled “Punjab- A historic perspective” has recently gone live.

    Try this PYQ:

    Q.Rivers that passes through Himachal Pradesh are: (CSP 2012)

    (a) Beas and Chenab only

    (b) Beas and Ravi only

    (c) Chenab, Ravi, and Satluj only

    (d) Beas, Chenab, Ravi, Satluj, and Yamuna

    Heritage of Punjab

    • Punjab means ‘the land of Five Waters’ referring to the rivers Jhelum, Chenab, Ravi, Sutlej, and Beas.
    • Much of the Frontier was occupied by Maharaja Ranjit Singh also known as Sher-e-Punjab in the early 19th century and then taken over by the East India Company when it annexed Punjab in 1849.
    • The state is divided into three parts- Majha, Doaba and Malwa.
    • It’s many festivals–Teej, Lohri, Basant Panchami, Baisakhi and Hola Mahalla to name some are celebrations that mirror the farming ethos.
    • Historically, Punjab has played host to a number of ethnicities, including the Aryans, Persians, Greeks, Afghans and Mongols, thus bestowed with a rich tangible heritage.
    • The southeastern city of Punjab, Patiala was once a princely state established under Baba Ala Singh, a Jat Sikh chieftain. He laid the foundation of the fort and now, is located in the region around Qila Mubarak or the Fortunate Castle.
    • Important tourist attractions are Kali Temple, Baradari Garden, Sheesh Mahal, Gurudwara Dukh Niwaran Sahib, Qila Mubarak complex etc.

    Holy shrines

    • The most sacred of Sikh shrines, the Golden Temple, is a major pilgrimage destination for devotees from around the world, as well as, an ever-increasing popular tourist attraction.
    • Construction of the Amrit Sarovar (pool of nectar) was initiated by Guru Amar Das, the third Guru, in 1570 and was completed by Guru Ram Das, the fourth Guru.
    • His successor, Guru Arjan Dev began work on the building after inviting Mian Mir, the Sufi saint, to lay its foundation stone in 1588.
    • Three years later, the Harimandar Sahib, or Darbar Sahib got completed.
    • In step with Sikhism’s basic tenet of universal brotherhood and all-inclusive ethos, the Golden Temple can be accessed from all directions.

    Legend of Banda Bahadur

    • The city of Fatehgarh Sahib is of special significance to Sikhs. The word “Fatehgarh”, means “Town of Victory”.
    • It is so-called because, in 1710, Sikhs under the leadership of Baba Banda Singh Bahadur conquered the area and destroyed the Mughal fort.
    • Banda Bahadur announced the establishment of the Sikh rule in the city and an end to the tyranny of the Mughal rule which had spread terror and injustice.