Title. Touch the Sky With Glory:
The Nation’s Air Power – The Weapon Systems of the IAF, its contemporary technology and our capability to secure the Nation
Speaker.: Air Marshal Simhakutty Varthaman PVSM AVSM VM VSM (Rted)
Title. The work of three World War Two cartoonists
Speaker. Mr. E.P. Unny, Chief Political Cartoonist, The Indian Express.
Speaker. Mr Nakul Bhalla
About the speaker. Mr Nakul Bhalla is a graduate in mechanical engineering from the Manipal Institute of Technology. He worked as a central planning engineer at Larsen and Toubro limited and then as a research assistant at IISc Bangalore. Starting a new chapter of his life, he joined the Dramanon Theatre Company as a creative partner and then later went on to start his own theatre company, The SparkPlug Theatre Company which is more than three and a half years old now.
Tue14Feb20175:30 pmConference Room
Speaker. Prof. K. L. Sebastian.
Title. Surmounting barriers cooperatively
Abstract. Many a times, long chain biological molecules have to pass through nano-sized pores. Entering a pore is a constraint, which results in a decrease of entropy or in other words, increase in free energy. Thus, the molecule has to cross a free energy barrier in space. Because of these biological examples, passage of long chain molecules have been studied in vitro too. Motivated by this we consider the process of passage of a long chain molecule over a free energy barrier. Interestingly, the simplest model for the process would be a chain of drunken walkers, climbing over a hill. One can find analytical solutions for simplest possible model for such systems, known as the Rouse model. Within this model, we find that calculating the activation energy for the process is (mathematically) equivalent to calculting the exponent in a quantum mechanical tunneling problem. Using this, it is easy to see that for a long enough molecule, the activation energy has to be independent of the length of the molecule. Further, a long enough molecule will cross the barrier with a steady velocity which is determined by the “steadily moving kink” like solutions of the associated non-linear equation. As a result, the time that it takes for the molecule to cross over the barrier is proportional to its length. The relevance of the results to biology will be quickly outlined.
If time permits, and if there is sufficient interest, my experiences in publishing the results too will be outlined, and it will be stressed how useful I found the arXiv.org to be.
Tue28Feb20175:30 pmConference Room
Speaker. Prof. Job Kurian
Title: Laser Based Diagnostics of Thermo-Fluid Dynamic Phenomena
Thu09Mar20175:30 pmConference Room
Speaker. Prof. B. V. R. Tata.
Title. Like likes Like: Experiments & Simulations on Charged Colloids
Abstract. Coulomb’s law tells that like charges repel and unlike charges attract. I will convince you by showing my own experimental and simulation results on charged colloids that like-charges attract under certain conditions viz., in the presence of large number of counterions. Direct measurements of pair-potential between like charged colloids have shown existence of long-range attraction in addition to the usual screened Coulomb repulsion. Though counterions are known to mediate the attraction, the exact mechanism of attraction still needs to be modelled and understood.
The prime aim of this talk is to share with you all the excitement in establishing the “Like likes Like” through experiments using home built set-up and own simulation codes.
Wed22Mar20175:30 pmConference Room
Speaker. Prof. Pramod S. Mehta
Title: To Breathe or Drive
Abstract. The talk will trace the history of engines from inception to the present and bring out various challenges faced in the course of its development. The role of science and technology in sustaining mobility without further suffocation will be highlighted and future prospects discussed.
Wed05Apr20175:30 pmConference Room
Speaker. Dr. Padmesh A.
Title: Designs For Purpose: Nature is a Brilliant Designer!
Abstract. The talk will introduce you through different molecular assemblies ( specifically the macromolecules) in living systems, their organisation and functions, giving emphasize on PROTEINS (polypeptides). To conclude, a small polypeptide is investigated to understand its structural preference.
Mon24Apr20175:30 pmConference RoomSpeaker. Dr. Swaroop SahooTitle. Electronic Warfare during World War IIAbstract. During World War II various countries attained varied level of technological expertise. The technological expertise or readiness covered various fields of science and technology. Some of the fields with lot of research activities, inventions, design and experiments were electronic warfare and navigational technology.This talk will give an introduction to various electronic warfare techniques, related hardware inventions and uses. It will also provide an insight into the war doctrines of countries and resultant uses of electronic warfare of 1935-45. This talk will also introduce the basic details of the navigational technology used by guided bombers (for bombing and landing) and first missiles (V1 and V2) of World War 2 years.
Wed26Apr20175:30 pmConference RoomSpeaker. Dr. Deepu PTitle. Pee-dynamicsAbstract. Dr. David Hu and his team recently showed that nearly all mammals take 21 s to empty their bladder irrespective of their body size. This discussion will reveal a conspiracy between isometry of the urinary system and hydrodynamics of urination to achieve this invariance.Ref: Yang, P. J., Pham, J., Choo, J., & Hu, D. L. (2014). Duration of urination does not change with body size. Proceedings of the National Academy of Sciences, 111(33), 11932-11937.
Tue09May20173:30 pmConference RoomSpeaker. Dr. Anand T. N. C., IIT MadrasTitle. Studies on droplets and spraysAbstract. Droplets and sprays are ubiquitous in daily life and play very important roles in diverse fields of engineering. The first part of the talk, will give a brief introduction to the kind of work we are pursuing in this field.The main portion of the talk will deal with droplet evaporation. Droplet evaporation is at the heart of all combustion systems, and also important in varied applications such as spray drying to form powders, spray painting, ink-jet printing, 3-D printing for additive manufacturing, etc. While several studies have been performed on single evaporating droplets in literature, the phenomenon has still not been completely explained. A fundamental study was performed to explore the reasons for deviations in the experimental and calculated (diffusion driven) evaporation rates of a pendant droplet in a 'quiescent' ambient. The results of the experiments, which show interesting insights into the common assumption of a quiescent environment in the presence of evaporation, will be presented.The last few minutes of the talk will very briefly introduce some thoughts on the dehumidification and water extraction process which we plan to work on. Studies on this area could especially benefit from a multi-disciplinary approach from interested members of the audience.
An infinite flock of pigeons
Speaker: Dr. Narayanan N
Department of Mathematics, IIT Madras
Abstract. We all 'know' that among all closed geometric plane figures with a fixed perimeter, the circle has the maximum area. What about proving this? An interesting idea was by Jacob Steiner. But his proof had one issue. He could prove that it cannot be anything other than circle. But does circle has this property? That he could not prove.
We fill this gap using the infinite avatar of Pigeonhole principle. We use it to first prove the famous Bolzano-Weierstrass theorem from Analysis and its generalisations. It can then be used to fill the gap in the proof of Steiner.
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