Events


    • Wed
      11
      Jan
      2017
      3:00 pmAuditorium

      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)

    • Wed
      18
      Jan
      2017
      3:00 pmAuditorium

      Title. The work of three World War Two cartoonists
      Speaker. Mr. E.P. Unny, Chief Political Cartoonist, The Indian Express.

    • Wed
      29
      Mar
      2017
      3:30 pmAuditorium

      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.


    • Tue
      14
      Feb
      2017
      5:30 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.

       

    • Tue
      28
      Feb
      2017
      5:30 pmConference Room

      Speaker. Prof. Job Kurian
      Title: Laser Based Diagnostics of Thermo-Fluid Dynamic Phenomena

    • Thu
      09
      Mar
      2017
      5:30 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.

    • Wed
      22
      Mar
      2017
      5:30 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.

    • Wed
      05
      Apr
      2017
      5:30 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.

    • Mon
      24
      Apr
      2017
      5:30 pmConference Room
      Speaker. Dr. Swaroop Sahoo
      Title. Electronic Warfare during World War II
      Abstract. 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.

       

    • Wed
      26
      Apr
      2017
      5:30 pmConference Room
      Speaker. Dr. Deepu P
      Title. Pee-dynamics
      Abstract. 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.
    • Tue
      09
      May
      2017
      3:30 pmConference Room
      Speaker. Dr. Anand T. N. C., IIT Madras
      Title. Studies on droplets and sprays
      Abstract. 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.

    • Wed
      11
      Jan
      2017
      3:00 pmAuditorium

      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)

    • Wed
      11
      Jan
      2017
      3:00 pmAuditorium
      Inauguration: Shri Rajiv Jayaraj
                            Sub Judge & Asst. Sessions Judge,
                            Secretary District Legal Services Authority, Palakkad
      Speaker:        Shri P. Premanth
                            Asst. Public Prosecutor, Palakkad
    • Wed
      18
      Jan
      2017
      3:00 pmAuditorium

      Title. The work of three World War Two cartoonists
      Speaker. Mr. E.P. Unny, Chief Political Cartoonist, The Indian Express.

    • Tue
      14
      Feb
      2017
      5:30 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.

       

    • Tue
      28
      Feb
      2017
      5:30 pmConference Room

      Speaker. Prof. Job Kurian
      Title: Laser Based Diagnostics of Thermo-Fluid Dynamic Phenomena

    • Wed
      01
      Mar
      2017
      11:00 amAuditorium

      Talk by Dr. Albert Sunny from Indian Institute of Science, Bangalore
      Wireless and Social Networks: Some Challenges and Insights

      Dr. Albert Sunny from Indian Institute of Science, Bangalore is going to present his work on wireless and social networks on 1-March-2017 at 11 am.
      Venue: Auditorium

      Abstract

      In sensor networks, the absence of infrastructure mandates the use of ad-hoc network architectures. In these architectures, nodes are required to route data to gateway nodes over a multi-hop network. In the first half of the talk, Dr. Sunny will present a unified framework that can be used to compare different deployment scenarios, and provide a means to design efficient large-scale energy harvesting multi-hop wireless sensor networks. In spite of the presence of voluminous reservoirs of information such as digital libraries and the Internet, asking around still remains a popular means of seeking information. In scenarios where the person is interested in communal, or location-specific information, such kind of retrieval may yield better results than a global search. Hence, wireless networks should be designed, analyzed and controlled by taking into account theevolution of the underlying social networks. This alliance between social network analysis and ad-hoc network architectures can greatly advance the design of network protocols, especially in environments with opportunistic communications. Therefore, in the second half of the talk, I will present a model that captures the temporal evolution of information in social networks with memory.

      About the speaker

      Dr. Albert Sunny completed his B.Tech. in Electrical and Electronics engineering from National Institute of Technology, Calicut, India and M.Sc.(Engg.) from Department of Electronic Systems Engineering, Indian Institute of Science, Bangalore, India. He went on to complete his Ph.D. at the Department of Electronic Systems Engineering, Indian Institute of Science, Bangalore, India. His research interests are in modelling, analysisand control of wireless and social networks.

    • Thu
      09
      Mar
      2017
      5:30 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.

    • Wed
      22
      Mar
      2017
      5:30 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.

    • Mon
      27
      Mar
      2017
      5:30 pmAuditorium

      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.

    • Wed
      29
      Mar
      2017
      3:30 pmAuditorium

      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.

    • Tue
      04
      Apr
      2017
      4:00 pmConference Room

      Speaker. Dr. Ramakrishnan Natesan,
      Postdoctoral Fellow, Department of Bioengineering, University of Pennsylvania

      Abstract. A biological cell is a complex soft matter system in which the various physical and chemical processes span multiple spatial and temporal scales. The various theoretical and computational tools developed in the context of soft matter physics and statistical physics may be utilized to build highly quantitative models to understand these processes. In this talk, I will first present a brief overview of multiscale modelling techniques and show how information can be transferred from one scale to the other in a self-consistent manner. In the next part, I will present an atomic to thermodynamic model to study the problem of how proteins interact with the cell membrane and how does the collective interactions of these proteins lead to large scale changes in the morphology of the cell membrane.

    • Wed
      05
      Apr
      2017
      5:30 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.

    • Thu
      13
      Apr
      2017
      11:00 amConference Room

      Abstract:

      Computer simulations based on first principles calculations play a central role in helping us understand, predict, and engineer physical, chemical, and electronic properties of technologically relevant materials. This can solve many problems towards building faster, smaller and cheaper devices for processing and storing information as well as for saving energy. Many of these processes involve electron excitations and strong local magnetic fluctuation that the ‘standard model’ of electronic structure, Density Functional Theory (DFT), can’t capture properly. In this context, I will highlight two popular approaches that go beyond the standard DFT. First, I will discuss how Dynamical Mean Field Theory (DMFT) in combination with DFT has recently been successful for detailed modeling of the electronic structure of many complex materials with strong electron correlation. To give an example, I will show the iron-based superconductors on both bulk and monolayer phases and their anomalous properties, which have their origin in strong Hund's coupling and give rise to the rich physics of Hund's metals. Next, I will discuss my collaborative effort toward developing a high scalable, open-source GW software to compute electronic excited states more efficiently for petascale architectures using the Charm++ parallel framework. At the end, I will briefly discuss topological crystalline insulators, which are a new class of topological materials where electronic surface states are topologically protected along certain crystallographic directions by crystal symmetry. I will show that, without any external perturbation, both massless Dirac fermions protected by the crystal symmetry and massive Dirac fermions with crystal symmetry breaking can coexist on a single surface.
    • Mon
      24
      Apr
      2017
      5:30 pmConference Room
      Speaker. Dr. Swaroop Sahoo
      Title. Electronic Warfare during World War II
      Abstract. 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.

       

    • Wed
      26
      Apr
      2017
      1430 Hrs to 1530 HrsConference Room
      Abstract: Dr. K.P. Naveen will introduce infrastructure-based wireless network that comprises two types of nodes, namely, relays and sinks. The relay nodes are used to extend the network coverage by providing multi-hop paths to the sink nodes (that are connected to a wireline infrastructure). Restricting to the one-dimensional case, we aim to characterize the fraction of covered region for given densities of sink and relay nodes. We first compare and contrast our infrastructure-based model with the traditional setting, where a point is said to be covered if it simply lies within the range of some node. Then, drawing an analogy between the connected components of the network and the busy periods of an M/D/\infty queue, and using renewal theoretic arguments we obtain an explicit expression for the average vacancy (which is the complement of coverage). We also compute an upper bound for vacancy by introducing the notion of left-coverage (i.e., coverage by a node from the left). We prove a lower bound by coupling our model with an independent-disk model, where the sinks' coverage regions are independent and identically distributed. Through numerical work, we study the problem of minimizing network deployment cost subject to a constraint on the average vacancy. If time permits I will discuss about the generalization of the above model to a hop-count constrained model; I will also mention about our on-going work on the 2-dimensional setting.

      Bio: Dr. K.P. Naveen received the B.E. degree in ECE from the Visveswaraya Technological University (VTU), Belgaum (2005), and Ph.D degree from the Department of Electrical Communication Engineering, Indian Institute of Science, Bangalore (2013). Subsequently, he was a post-doctoral fellow with the INFINE team at INRIA Saclay, France. Since Jan. 2016 he is with the Department of Electrical Engineering, Indian Institute of Technology Madras, as a DST-INSPIRE faculty. His research interests include modeling and performance analysis of wireless networks, stochastic games and optimal control.
    • Wed
      26
      Apr
      2017
      5:30 pmConference Room
      Speaker. Dr. Deepu P
      Title. Pee-dynamics
      Abstract. 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.
    • Wed
      03
      May
      2017
      11:00 amConference Room

      This talk will focus on distributed power control in a cellular network in the presence of strategic users using game theory. Strategic users in a wireless network cannot be assumed to follow the network algorithms blindly. A pricing mechanism is proposed and the optimal prices are obtained to make the users comply with the network objective. Some of the users, which we call malicious users, aim to hurt the performance of other users. Examples of such behavior is jamming where the jammer transmit with higher power in order to create interference to other users. A modified utility model is used to model this malicious behaviour of malicious users. The talk will consider a scenario, in which the network and regular users gather probabilistic information about the presence of jammers by observing the network over a long time period. The regular users modify their actions according to this Bayesian information. Bayesian pricing mechanisms which have power price signals from the network to the users are analyzed and the Bayesian Nash Equilibrium (BNE) points are obtained. The optimal prices are also obtained for the Bayesian case.

      About the speaker

      Anil Kumar obtained his B. Tech from the Government College of Engineering Kannur, Kerala in 2006. In 2010, he obtained his MS by Research, from the Department of Electrical Engineering, at Indian Institute of Technology Madras, India under Prof. Srikrishna Bhashyam. During his MS, he did his thesis work for 6 months at Indian Instiute of Science, Bangalore with Prof. Rajesh Sundaresan. Between May 2010 and December 2011, he worked as a research scientist with the Telekom Innovation Laboratories (T-Labs) of Deutsche Telekom in Berlin which is associated with TU Berlin. He obtained his PhD in August 2015, from the Chair of Theoretical Information Technology at Technical University of Munich, Germany, under Prof. Holger Boche. His PhD thesis was titled ‘Resource Allocation and Pricing Mechanisms for Wireless Networks with Malicious Users‘. Now he is a postdoctoral researcher jointly at the Chair of Communication Networks at TU Dresden and 5G Labs Germany.

    • Tue
      09
      May
      2017
      3:30 pmConference Room
      Speaker. Dr. Anand T. N. C., IIT Madras
      Title. Studies on droplets and sprays
      Abstract. 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.