All Episodes

Pratidhvani – Humanizing Science

(also on YouTube, Spotify, Apple podcast)

Namaste, Hola, & Welcome from G.V. Pavan Kumar.

Pratidhvani (ಪ್ರತಿಧ್ವನಿ/प्रतिध्वनि) means reflection or resonance (of sound). Here, the aim of the podcast is to resonate with knowledge & humanize science.
The podcast has two themes:
1) History & Philosophy of Physical Sciences & Technology,
2) Conversations with people related to their intellectual journey & themes mentioned in 1)
Below is the link to all the episodes. Italicized ones are solo episodes

  1. Pratidhvani – Introduction
  2. Inspirations from Japan
  3. Six Jugalbandis of Scientific Research
  4. Science, Rationality and Compassion
  5. Ashkin’s Story – no prize to Nobel prize
  6. Importance of Failed Experiments
  7. Two Chandrasekhars and their students
  8. Gripping History of Laser Invention
  9. Conversation with Aditi Sen (De)
  10. Conversation with Sutirth Dey
  11. Conversation with Seema Sharma
  12. Conversation with Nagaraj Balasubramanian
  13. Conversation with Saptarshi Basu
  14. Conversation with Amitabh Joshi
  15. Conversation with Ranjini Bandyopadhyay
  16. An Indian Prof’s 15 lessons
  17. Conversation with E Arunan
  18. Conversation with Kaneenika Sinha
  19. Conversation with Arindam Ghosh
  20. Conversation with M.S. Santhanam
  21. Conversation with Biman Nath
  22. Conversation with Vishwesha Guttal
  23. Conversation with Sudeshna Sinha
  24. Conversation with Dibyendu Nandi
  25. Conversation with Kasturi Saha
  26. Conversation with Sourabh Dube
  27. Conversation with Srabanti Chaudhury
  28. Conversation with Nirmalya Kajuri
  29. Conversation with Jasjeet Singh Bagla
  30. Conversation with Angshuman Nag
  31. Conversation with Nirmal Raj
  32. Let go… the ego!
  33. A call from Varanasi
  34. 6 reasons why I do Science
  35. Conversation with Neeldhara Misra
  36. Conversation with Ashish Arora
  37. Conversation with Shivakumar Jolad
  38. Conversation with Atikur Rahman
  39. Conversation with Susmita Adhikari
  40. Conversation with Suresh Govindarajan
  41. Conversation with B. Ananthanarayan
  42. Conversation with Akhlesh Lakhtakia
  43. Conversation with Anisa Chorwadwala
  44. Conversation with Deepak Dhar
  45. Leonardo, Rayleigh & Blue Sky research
  46. Conversation with Sandhya Koushika
  47. Conversation with Umakant Rapol
  48. Conversation with Jayant Murthy
  49. Heaviside को Maxwellian क्यों कहा जाता है?
  50. Conversation with Sudipta Maiti
  51. Conversation with Snigdha Thakur
  52. Conversation with Mayurika Lahiri
  53. Conversation with Sundar Sarukkai
  54. Conversation with Dibakar Roy Chowdhury
  55. Conversation with Arnab Mukherjee
  56. Conversation with Devapriya Chattopadhyay
  57. Conversation with Venu Gopal Achanta
  58. Conversation with Guruswamy Kumaraswamy
  59. Conversation with Pushkar Sohoni
  60. Conversation with Neeraja Dashaputre
  61. Conversation with Sreejith G.J.
  62. Sadi Carnot & Thermodynamics
  63. Masterpiece: The Book of Optics by al-Haytham
  64. CV Raman and Quantum Mechanics
  65. Conversation with Jeevanjyoti Chakraborty
  66. Conversation with Sivarama Krishnan
  67. Conversation with Pramod Pillai
  68. Conversation with Joy Mitra
  69. Conversation with Joyee Ghosh
  70. Conversation with Harinath Chakrapani
  71. Conversation with Sunil Nair
  72. Conversation with Urbasi Sinha
  73. Conversation with Anindita Bhadra
  74. Conversation with Anindya Datta
  75. Conversation with Subhankar Bedanta
  76. Conversation with Ganesh Bagler
  77. Conversation with Chinmay Tumbe
  78. Conversation with Gautam Menon
  79. Gerhard Herzberg – scientific life
  80. Conversation with Chaitra Redkar
  81. Conversation with Aninda Sinha
  82. Conversation with Bhaskaran Muralidharan
  83. Conversation with Ayan Banerjee
  84. Why Read Books in the age of the internet?
  85. Conversation with Sangeeta Kale
  86. Conversation with Siddharth Tallur
  87. Conversation with Karishma Kaushik
  88. Conversation with Samrat Mukhopadhyay
  89. Conversation with Vivek Polshettiwar
  90. Listening spell-bound to Prof. Raman
  91. Conversation with Vinita Gowda
  92. Science + History = ??
  93. GHoP 001 Engineering Civilizations
  94. GHoP 002 Physics Portal of Aristotle
  95. Conversation with K. Sridhar
  96. GHoP 003 Maths, Mechanics & Eureka
  97. Physics & Pratidhvani
  98. Conversation with Bejoy Thomas
  99. Conversation with Vijaykumar Krishnamurthy
  100. GHoP 004 Hero’s Journey in Mechanics
  101. Conversation with Shubashree Desikan
  102. Conversation with Vipul Dutta
  103. Conversation with Robert T. Pennock
  104. Conversation with Shivprasad Patil
  105. Conversation with Kollegala Sharma
  106. Conversation with Arka Banerjee
  107. Conversation with Aparna Deshpande
  108. Conversation with Amit Agarwal
  109. Conversation with Vijay Chikkadi
  110. Conversation with Jyotishman Dasgupta
  111. Conversation with A.R.Venkatachalapathy
  112. Conversation with Satish Patil
  113. Daniel Dennett on Criticism
  114. Conversation with Chaitanya Athale
  115. Icons of Science in India – some thoughts
  116. Conversation with Srubabati Goswami
  117. Conversation with Krishnendu Sengupta

FOLLOW THE MONEY – A useful model

Our world is a place with complex ideas superimposed on people with ever-changing attention. Complex ideas are complex because they depend on multiple parameters. If something changes in the world, then that change can occur due to multiple reasons.

Unlike a carefully designed physics experiment, there are too many ‘hidden variables’ in human life and behavior, especially when they act collectively. In such a situation, it is pertinent to search for models to understand the complex world. Models, by definition, capture the essence of a problem and do not represent the complete system. They are like maps, zoomed out, but very useful if you know their limitations. I keep searching for mental models that will help me understand the complex world in which I live, interact, and comprehend.

Among many models, one of them that I use extensively is the follow-the-money model. This model explains some complex processes in a world where one does not have complete information about a problem. 

Take, for example, the incentives to choose a research project. This is a task that as scientists, we need to do very often. In the process of choosing a project to work on, researchers have to factor in the possibility of that research being funded prior to the start of the project. This is critical for scientific research that is dependent on infrastructure, such as experimental sciences, including physics, chemistry, and biology. Inherently, as researchers, we tend to pick a topic that is at the interface of personal interest, competence, relevance, and financial viability.

The viability is an important element because sustained funding plays a critical role in our ability to address all the contours of a research project. Thus, as scientists, we need to follow the money and ask ourselves how our research can be adapted to the financial incentives that a society creates. A case in point is research areas such as AI, where many people are aware of its potential and, hence, support from society and an opportunity to utilize the available incentive.

It is important for the public to be aware of this aspect of research where the financial incentive to execute a project plays a role in the choice of the project itself. The downstream of this incentive is the opportunity to employ more people. This means large funding projects and programs attract more researchers. More people in the research area generate more data, and more data, hopefully, will result in more knowledge in the chosen research area. This shows how financial incentives play a critical role in propelling a research area. In that sense, the ‘follow the money’ model has a direct correlation with more researchers flocking towards a research area.

The downside of this way of functioning is that it skews people towards certain areas of research at the cost of another research area which may not find financial support from the society. This is a topic that is generally not discussed in science classes, especially at the undergraduate and research level but I think we should discuss with students about this asymmetry as their futures are dependent on financial support that they can garner.

Broadening the scope further, the ‘follow the money’ model is useful to understand why a certain global trend rises or falls. A contemporary global upheaval is the situation of war in Ukraine and Gaza. At first sight, it looks like these wars are based on ideologies, but a closer look reveals that these wars cannot be fought without financial support. Such underpinning of the money running the war reveals patterns in geopolitics that are otherwise not easy to grasp.

Ideologies have the power to act as vehicles of human change, but these vehicles cannot be propelled without the metaphorical fuel – that is, money. The ‘follow-the-money’ model can show some implicit motivation and showcase how ideologies can be used as trojan horses to gain financial superiority either through captured resources or through showcasing the ability to capture that resource. Following money is also a very powerful and useful model for understanding many cultural, sociological and political evolution, even in a complex country like India and other South Asian countries. I leave it as an intellectual assignment for people who want to explore it 😊. You will be surprised how effective it can be in explaining many complex issues, provided we know the limitations of the model. 

As I mentioned earlier, a model is like a map. It is limited by resolution, the dimension and the viewpoint. But they are useful for navigating a complex world.

Conversation with Ayan Banerjee

Ayan is an experimental optical physicist and a Professor at IISER Kolkata: https://www.iiserkol.ac.in/~ayan/group_leader.html.

He is also a playwriter, theatre actor and a mentor to many science and arts enthusiasts.

What drives him to do all these things? We discuss this and many other things in this episode.

References:

  1. “Group Leader | Light-Matter Lab.” Accessed December 2, 2024. https://www.iiserkol.ac.in/~ayan/group_leader.html.
  2. “IISER Kolkata – Ayan.” Accessed December 2, 2024. https://www.iiserkol.ac.in/web/en/people/faculty/dps/ayan/.
  3. “Ayan Banerjee – Professor – Indian Institute of Science Education & Research (IISER), Kolkata | LinkedIn.” Accessed December 2, 2024. https://in.linkedin.com/in/ayan-banerjee-3034208.
  4. Department of Physical Sciences (DPS), IISER Kolkata, 2022. https://www.youtube.com/watch?v=vgv7iODxYTY.
  5. “Department of Physical Sciences : Home.” Accessed December 2, 2024. https://physics.iiserkol.ac.in/.
  6. Ayan Banerjee. Accessed December 2, 2024. https://www.facebook.com/ayan.banerjee.5895.
  7. “‪Ayan Banerjee – ‪Google Scholar.” Accessed December 2, 2024. https://scholar.google.co.in/citations?user=GQo7yG4AAAAJ&hl=en.
  8. Gupta, Subhasish Dutta, Nirmalya Ghosh, and Ayan Banerjee. Wave Optics: Basic Concepts and Contemporary Trends. CRC Press, 2015.
  9. Haldar, Arijit, Sambit Bikas Pal, Basudev Roy, S. Dutta Gupta, and Ayan Banerjee. “Self-Assembly of Microparticles in Stable Ring Structures in an Optical Trap.” Physical Review A 85, no. 3 (March 27, 2012): 033832. https://doi.org/10.1103/PhysRevA.85.033832.
  10. “Indian Institute of Science.” Accessed December 2, 2024. https://iisc.ac.in/events/remembering-prof-vasant-natarajan-1965-2021/.
  11. “LML.” Accessed December 2, 2024. https://sites.google.com/iiserkol.ac.in/light-matter-lab-iiserk/.
  12. “LML – Physics of Micro-Bubbles.” Accessed December 2, 2024. https://sites.google.com/iiserkol.ac.in/light-matter-lab-iiserk/research/physics-of-micro-bubbles.
  13. Network, N. F. N. “Theatre At IISER-K Against Misinterpretation of Science And Superstition,” January 17, 2019. https://newsfromnadia.in/theatre-at-iiser-k-against-misinterpretation-of-science-and-superstition/.
  14. “Self-Assembly of Mesoscopic Materials To Form Controlled and Continuous Patterns by Thermo-Optically Manipulated Laser Induced Microbubbles | Langmuir.” Accessed December 2, 2024. https://pubs.acs.org/doi/full/10.1021/la402777e.
  15. X (formerly Twitter). “Ayan Banerjee (@ayanban7) / X,” November 26, 2024. https://x.com/ayanban7.

Conversation with Bhaskaran Muralidharan

Bhaskaran is an Electrical Engineer & a Professor at the Indian Institute of Technology Bombay: https://cnqt-group.org/?page_id=25

He is a quantum transport theorist, musician and long-distance runner.

We explore his intellectual, musical and running journey.

Also, don’t miss a segment on Bhaskaran playing the piano.

References:

  1. “Bhaskaran Muralidharan [Department of Electrical Engineering IIT Bombay].” Accessed November 26, 2024. https://www.ee.iitb.ac.in/wiki/faculty/bm.
  2. “‪Bhaskaran Muralidharan – ‪Google Scholar.” Accessed November 26, 2024. https://scholar.google.co.in/citations?user=PWFVEKIAAAAJ&hl=en.
  3. “Group Members – CNQT @ IIT Bombay.” Accessed November 26, 2024. https://cnqt-group.org/?page_id=25.
  4. Muralidharan, B., A. W. Ghosh, and S. Datta. “Probing Electronic Excitations in Molecular Conduction.” Physical Review B 73, no. 15 (April 10, 2006): 155410. https://doi.org/10.1103/PhysRevB.73.155410.
  5. Prof. Bhaskaran Muralidharan || Electrical Engineering || EESA IIT Bombay, 2021. https://www.youtube.com/watch?v=O8fFdb3-NRQ.

Conversation with Aninda Sinha

Aninda Sinha is a theoretical physicist and a professor at Indian Institute of Science, Bengaluru: https://chep.iisc.ac.in/Personnel/asinha.html

He works at the interface of quantum field theory, superstrings and mathematical physics. In this episode, we explore his intellectual journey and discuss his recent work that led to a new series on pi, generalizing Madava’s series.

References:

  1. “Aninda Sinha.” In Wikipedia, June 8, 2024. https://en.wikipedia.org/w/index.php?title=Aninda_Sinha&oldid=1227837004.
  2. “‪Aninda Sinha – ‪Google Scholar.” Accessed November 15, 2024. https://scholar.google.com/citations?user=-aNKuhIAAAAJ&hl=en.
  3. “Asinha » Page 1 of 3.” Accessed November 15, 2024. https://chep.iisc.ac.in/Personnel/asinha.html.
  4. Saha, Arnab Priya, and Sinha, Aninda. “Field Theory Expansions of String Theory Amplitudes.” Physical Review Letters 132, no. 22 (2024). https://doi.org/10.1103/PhysRevLett.132.221601.
  5. Ananthanarayan, B, and Aninda Sinha. “Bootstrapping Quantum Field Theory: Past, Present and Future.” CURRENT SCIENCE 126, no. 8 (2024).
  6. Bischoff, Manon. “String Theorists Accidentally Find a New Formula for Pi.” Scientific American. Accessed November 19, 2024. https://www.scientificamerican.com/article/string-theorists-accidentally-find-a-new-formula-for-pi/.
  7. From Euler to Veneziano and Back by Aninda Sinha. Accessed November 15, 2024. https://www.youtube.com/watch?v=dtKmoXW8Jmg.
  8. “Michael Green.” Accessed November 19, 2024. https://www.damtp.cam.ac.uk/user/mbg15/.
  9. “Michael Green (Physicist).” In Wikipedia, November 12, 2024. https://en.wikipedia.org/w/index.php?title=Michael_Green_(physicist)&oldid=1256888698.
  10. Stringing Madhava’s Pi: Aquantum Field Theory Perspective | Talk by Aninda Sinha. Accessed November 15, 2024. https://www.youtube.com/watch?v=qn_XUxmWlX8.
  11. “Thursday Colloquium | Raman Research Institute.” Accessed November 19, 2024. https://www.rri.res.in/events/stringing-madhavas-pi-quantum-field-theory-perspective.

Conversation with Chaitra Redkar

Chaitra is a political scientist, Associate Professor & Chair of Humanities at IISER Pune – https://www.iiserpune.ac.in/research/department/humanities-and-social-sciences/people/faculty/regular-faculty/chaitra-redkar/326

She explores modern Indian political thought through the lens of philosophy and history.

In this episode, we discuss her intellectual journey in capturing an interesting trinity.

References:

  1. “Chaitra Redkar – IISER Pune.” Accessed November 8, 2024. https://www.iiserpune.ac.in/research/department/humanities-and-social-sciences/people/faculty/regular-faculty/chaitra-redkar/326.
  2. Redkar, Chaitra. Gandhian Engagement with Capital. First Edition. New Dehli: SAGE Publications India Pvt Ltd, 2019.
  3. X (formerly Twitter). “Chaitra Redkar (@R_Chaitra) / X,” April 9, 2023. https://x.com/r_chaitra.
  4. “Amazon.In.” Accessed November 8, 2024. https://www.amazon.in/Books-Chaitra-Redkar/s?rh=n%3A976389031%2Cp_27%3AChaitra+Redkar.
  5. “Chaitra (@my_historical_horizon) • Instagram Photos and Videos.” Accessed November 12, 2024. https://www.instagram.com/my_historical_horizon/.

Conversation with Gautam Menon

Gautam is a theoretical physicist who is driven by curiosity. His explorations include superconductivity, biophysics, active matter, public health, art, music etc.

He is a Professor & Dean at Ashoka University: https://www.ashoka.edu.in/profile/gautam-menon-2/.

In this episode, we discuss his intellectual journey until now.

References:

  1. Ashoka University. “Gautam Menon.” Accessed October 28, 2024. https://www.ashoka.edu.in/profile/gautam-menon-2/.
  2. “Gautam I. Menon’s Home Page.” Accessed October 28, 2024. https://www.imsc.res.in/~menon/.
  3. University, Ashoka. “Prof. Gautam Menon Is the New Dean of Research at Ashoka University.” Ashoka University, October 4, 2022. https://www.ashoka.edu.in/prof-gautam-menon-is-the-new-dean-of-research-at-ashoka-university/.
  4. X (formerly Twitter). “Gautam Menon (@MenonBioPhysics) / X,” January 14, 2022. https://x.com/menonbiophysics.
  5. IndiaBioscience. “Interdisciplinarity: How to Make It Work for You,” November 2, 2018. https://indiabioscience.org/columns/opinion/interdisciplinarity-how-to-make-it-work-for-you.
  6. Menon, Gautam I. “Active Matter.” arXiv, March 10, 2010. https://doi.org/10.48550/arXiv.1003.2032.
  7. “Science, Journalism, Media: Communicating Science in a Changing India.” Accessed October 28, 2024. https://www.imsc.res.in/~scimedia/index.html.