Good day, S Abhishek. I'm Arjun. I've had a look through your background and your professional record. I'm interested in hearing more about your work and how you see yourself fitting in here with our faculty. Ready to start?

Thank you for giving me a chance.

So my.

My journey started from.

My B.Tech was from NSS College of Engineering, Palakkad later on which I have carried to Amtrak Instructional Engineering from the same Ms. College of Engineering and for a brief period during my masters I have worked in as a project engineer at Legal Proportion Services System Center, Trivandrum where I have majorly dealt with the research type of projects basically about constitutive modeling. So from third only I have I got inspired about research.

And from the femin scientist over the actually inspired me to do uh, much and contribute in the in the field of research, which, uh, inculcated me a strong feeling about doing PHP. Umm, So I continued with my I joined for PhD at international technology where I did my PhD in structural engineering and Doctor Sanjita Chakraborty. So my area of research was. Uh, in migration control. So basically it's like.

Developing and proposing in our active control algorithm for main infrastructure control, so which can be extended to other other areas as well. And we developed a theoretical formulation and subsequently followed my identical numerical problem and later on stage we use the same algorithm and explain effectively. Experimented the algorithm using a model shared frame.

So both, uh, single story and two-story model share frameworks being tested later on the test was continued to A3 dimensional frame as well. And the effectiveness was actually proved and all the results are being published. So later on the layers to stage, we just took some, uh, another realistic problem such as vehicle bridge interaction and we studied how the control effects uh, actually. Uh, benefits, whether it is whether it benefits the vehicle's interaction or not.

Actually that was the main last motive more motion on objective of study. So after that I have been doing some independent research as well and as a resource associate also I've been doing some independent research. So now my main research is based on some some sort of biopolymers based materials for developing some vibration control and vibration integration and extending that bio gas polymers to some piece of.

So just in products as well. So, so kind of a different orientation, but I but it, it's actually very good to do something other than what we have done. So basically these things are being done just to ensure vibration controversy.

And, uh, coming to the last part of the query, like, uh, how I feel, how I fit in the currently. So, uh, in BAT, So I love teaching to be very different. And I have been a tutor for engineering mechanics and, uh, for structural engineering laboratory during my PhDs, uh, during my PhD, uh, so around 2 terms I did for a structural laboratory, one term for engineering mechanics and another term for, uh, Congress structures. So basically I was.

I was responsible for conducting the tutorials and assignments and.

Checking the question associate transfer so I think that has enough help me to.

Contribute and to the and made me some, uh, good feeling about teaching in my career and spec as well. So I have decided to move into Academy as a system browser to begin. We can begin my early career. So thank you.

Thank you for sharing that, Professor—quite an impressive journey through academia and research.

Professor Abhishek, thank you for providing insights into your background and achievements. Let's proceed with verifying your expertise in the required areas. First, let's examine your foundation in earthquake engineering. Could you briefly explain the concept of seismic base isolation and its importance in reducing earthquake-induced forces in structures?

As you pass you control. So actually technically vibration control can't be divided into passive control, uh, to control and see make you control. And she's making isolation is, uh, technique, uh, which is commonly used in passive, passive control. So in base isolation, what we actually do is that, uh, we actually add an additional, uh, sort of isolators, which can be based on rubber, dead rubber or some other polypropylene materials or some, some sort of springs as well, which.

So, umm, so I speak based isolation is a type of actually, uh, uh.

The same actually and we have tested today 1 based isolated distance between.

So what what it does actually is that it actually shifts the natural frequency of the system. So suppose with the frequency system or the order structure actually vibrates.

That is some sort of, uh, supposed, let's say experts, what happens is that it shift the excerpts with the right side so that, yeah, the frequency is being increased so that a proper isolation is being provided to the India superstructure. So what, what happened when a fake or some sort of excitations happened? Uh, the superstructure is being uh, this access AX exactly accesses some separate sort of rigid body.

And that don't let the the motion of the ground due to the earthquake.

Will exactly, will be, will not, will not be directly affecting the superstructure. And such a such a setup usually helps uh, to minimize the damage in seismic pieces, though it which can increase the displacement of the superstructure uh, but uh, it can reduce the impact on having in the.

Uh, meetings and, uh, during design, we used to check whether it exceeds the displacement. So that's an important check which we used to do in this session. Thank you.

Thank you, Professor Abhishek, for outlining the concept of seismic base isolation. You’ve explained its role in shifting the natural frequency of the structure and reducing earthquake-induced damage well. Since you mentioned testing base isolators in the past, could you share insights into the challenges you faced during practical implementation or testing of these systems?

So practical implementation. As such the problem is like the main practical problem.

As far as I know is that is how.

How well we connected to the superstructure or somehow well we'll going to connect to the pile cap to the superstructure if you're doing in some sort of deep formulation. So such part is needs to be studied then and which I am not well thorough, but I'm currently learning it and in the form in the question of testings isolate us today as I have mentioned, I have tested on isolate and testing isolator was. Was not that that? Not that TDs but.

What we did was we did a simple force deformation analysis. You know how the isolator actually behaves at different load capacities and for different strength and different displacement fields. So.

Basically that has helped us how how well the isolators will be taking the load and transferring the load mainly and how long it will actually help to shift the natural frequency. So suppose what happens is that basically the seismic isolators which we used to buy from vendors is usually consist of.

Like how much shift is going to happen in the natural frequencies based on, uh, additional date, So based additional. So based on that, actually we have to test how, how well it is going to perform, especially the force deformation card, but testing in the.

Uh, frequency part, it's, uh, quite tricky, which uh, we used to do in field or we used to do in some sort of scale parts.

Thank you.

Thank you, Professor Abhishek, for that detailed explanation. You've clarified the challenges in both connection design and testing processes effectively, particularly the importance of force-deformation behavior and frequency testing. Let's move to the next area. Could you elaborate on how a pushover analysis is conducted in structural engineering and its purpose in assessing structural performance?

Uh, the sugar analysis. Umm.

I am not well bursting pusher analysis, though I have read it. Mm-hmm. In generally, uh, what shower analysis we used to do is that, umm, we'll increase the load step by step and estimate how far it will go. Uh, in the case of whether if you're going to increase in the form of displacement or rather in the form of force, we just increase it and how we see how far it will go. And based on that, actually we will.

Take your time, Professor Abhishek. Feel free to collect your thoughts.

Examine the 1st.

Post displacement curve.

And, umm.

I have to recollect that one. Uh, that's what I have. I remember, sorry.

Thank you, Professor Abhishek. I appreciate your effort in explaining it. It's clear you've encountered it in your studies, and understanding its relevance in estimating performance under increasing loads aligns with structural behavior analysis. Let's shift to the teaching aspect. Can you describe your approach to teaching a theoretical and a lab-based course in structural engineering to ensure effective student learning outcomes?

My approach while teaching a theoretical subject will be mostly focused on like.

Uh, understanding or giving clear clarification the concerns. Uh, rather than focusing entirely on problems.

And it will be consisting of some sort of assailants. And apart from assignments, there will be a take away as well. My exams will be based on purely a close book exam. And sometimes, occasionally you would like to conduct some sort of open, open book exam as well. And.

I'll be more happier, uh, if the curriculum allows that. I'll be giving some sort of open projects at the end of the semester for each subjects. What's each order I take? So the, the students have to do some sort of, uh, realistic or some sort of challenge research challenge approaches for a question, uh, which can be done either individually or which can be done as a group, which can be sorted out later actually, and based on that.

I will.

Subject based project also will be given.

So, so the preferably I wouldn't be asking students to use open source softwares because promoting open source softwares is also very essential as now in commercial sectors are, you know, kind of showing in a black box kind of behaviors and in a in sort of experiments, experiments will be crafted in such a way that all the questions will be.

In an applied like in questions will be in some sort of application application like an. The students have to think.

Craft the procedure for the test. Uh, suppose let's say they have to analyze some sort of forces or something in a structural laboratory. My question will be given in such a way that, uh, it has it, it has some sort of text. It's actually some sort of a situation and what they will do with some sort of a situation if they are structured in India. So the laboratory questions also will be challenged to stand by in such a way so that it will encourage students to think in that way as well. Thank you.

Thank you, Professor Abhishek, for elaborating on your teaching philosophy. Your approach combines theoretical clarity with practical challenges, including open projects and promoting open-source software, which fosters both applied learning and critical thinking. A well-rounded approach like this is commendable. Next, let’s address how you evaluate students. Could you describe how you would design an assessment system to fairly gauge learning outcomes in a structural engineering class?

So Mike, how is the students? It's pretty simple like.

Uh, I don't see how they approach the problem technically.

Uh, it's not randomly. I will give some marks for the step or bank give you give marks for something else. I won't I my approach is little bit different. Basically, I will see how the student has approached the problem. Suppose some students may have a good solution or a good methodology or maybe entirely new methodology, but they might not produce a exact result due to some sort of misstep or miscalculations.

But such efforts are actually essential in protocol their career because keep providing getting new results or getting new sort of methodology for some sort of questions is very essential as it implicates implicates that they are thinking in a different line as opposed to be in a conventional way. So such such I will gauge them in their ability based on that rather than directly giving based on the on the solutions they have obtained.

And I will keep a certain weight for that as well.

So that will be my sort of assessment and I don't think that some students will outperform something because of that. You know, I don't think so because you want to say student will understand something and wants to learn something. They will do any means by any means they will do that so.

There is not some sort. There will not be any sort of bias in such cases.

So my assessment is pretty clear. Thank you.

Yes.

To begin, Professor, can you describe a specific introductory course in earthquake or structural engineering that you find particularly rewarding to teach?

I would be proposing some, something based on basic dynamics structure dynamics course, uh, followed by vibration control. So vibration control is some sort of subject, which in some sort of advanced subject, which, uh, uh, I would like to propose as, uh, because such courses are not that, uh, given on that, but, but not that provided with something most of the universities in our country, so.

Giving some sort of subject which they have not social and.

Introducing them to a new world of vibration, uh, will be uh, challenge type both challenging and it will be both encouraging as well because it's also some sort, some sort of theoretical work. I think ascent tree cost for undergraduate A structural dynamics, basic structural dynamics will be knowing and also in postgraduate course. If you're asking me, then I would be more happy with proceeding with vibration control.

I will try this.

Thank you.

Thank you, Professor. Let's proceed.

Professor Abhishek, let's focus on two aspects of your academic background and research. First, I'd like to hear about your doctoral research on the "Effect of frequency adaptive feedback control system in structural vibration." Could you briefly summarize the main findings or contributions of this research?

Thank you for the question SO.

The research was basically about proposing some sort of, uh, control strategy so that the control forces being essentially reduced. So our problem arises or the, our question of problem was when we have observed some sort of phenomena, which is called as control spillover. And control spillover was extensively studied during 1980s and 1990s, but after that.

There were no much jetties being considered in controls below or in anything that sounds below.

Mainly All in all these cases when they have studied the spillover affecting of the control and observer observation spillover, the main effect was. But how if friendly behaves especially in this in set of different control algorithms, so that actually crackers to find how to tune the controls below or how to reduce the controls below such that.

So.

When we propose a new control such that it can be tuned in such a way that it is, uh, frequency sensitive, then these controls flows will be effectively reduced. So based on that problem, we started and we proposed a.

In the entirely new control strategy based on.

Sorry.

Next one.

Sorry, I'm not, I'm just completing it so based on maximum Postman theorem.

So where where we have used the frequency sensitive part.

Thank you, Professor Abhishek. It seems your research centers on refining control strategies to mitigate control spillover issues,

Occur and based on that actually we have developed the control strategy.

And for following, we did a small spillover analysis study both in experiment as well as in theoretical and we try to reduce that one and successfully it was reduced and the acceleration of the main part is that higher frequencies be higher frequency and the control force especially at the higher frequency regions are being minimized. So that was the significant contribution because most of the control will not fail in that part. So and most of the control algorithm which provides some such sort of behaviors are also already. Advanced and very complex.

So we propose a simple control strategy which does that frequency sensitive part using a using a transfer function or the classical control theory approach. So that was one of the main highlighters of our work and.

And we just implemented as I have mentioned, we just implemented in a share frame model and we actually was very intrigued to implement that in some sort of small structures like satellites and all. But due to some constraints, we were not able to do that one. So especially if you spillover can be seen in miniature structure cycles and all So assigned nowadays satellites this would spill over us being reduced by providing N number of actuators which is some sort of.

Some sort of cost expense event?

And tedious as well, but that's the way. Only we can do that. And.

Thank you.

Yeah. As I have mentioned earlier about the course vibration control, so essentially vibration with control we will be dealing with as you have as you have mentioned earlier about the base installation and others of some sort of control control strategies. This is some sort of another control strategy just that is this is that. So basically nowadays we use a lot of Mr. Campos or some sort of. Viscous based numbers. These are commonly used numbers. So what we can do is that we can some sort of create an algorithm.

Thank you, Professor Abhishek, for providing a detailed account of your research. It's impressive that you developed a frequency-sensitive control strategy to mitigate control spillover, especially focusing on higher frequency regions. This addresses a significant gap, particularly in simpler and cost-effective ways compared to advanced, but more complex, approaches. Now, a related question—how do you think the findings from your research could be translated into simplified concepts or applications that students, particularly undergraduates, could grasp in a classroom context?

Or create or control the voltage or magnetization instead of numbers to effectively address the.

Uh, I think the address of vibrations, uh, based on the proposed control strategy. So that's how we actually can, uh, translate this into an industrial product. So this is how actually we did in the experiment. So what we did was in a scaled model, but it can be extended to the model as well. So it is pretty simple to understand as it is as because, uh, it can be implemented in existing, uh, in the form of existing devices or in the form of existing.

Which we have, which are available as of now, yeah.

Thank you, Professor Abhishek. What I hear is that you aim to link theoretical advancements, such as your frequency-sensitive control strategy, to practical implementations by using existing devices like MR dampers or viscous-based mechanisms. This connection could also make it easier for students to relate classroom learning to real-world applications, particularly by experimenting with scaled models and numerical algorithms directly. One more question on this. Considering the interdisciplinary nature of modern engineering problems, how would you incorporate this research into a curriculum or a project-based learning setup to foster collaboration across different fields like materials science, electrical engineering, or software development?

So that's a really great question. So if you are asking me about how you do or how my research would extend in it. So my base my basically my research is some sort of image blurry with respect to structure and structuralism and some sort of mechanical engineering, so.

How would you be going to be, how is is it going to be a instrumental material insert in the sort of material engineering thing is that what we have proposed in the frequency sensitive such a material does not doesn't exist. But nowadays due to the advancements in the especially in sort of metamaterials and other other artificial materials which are being crafted especially for some sort of purposes.

Uh, creating an MMT or other other sort of material based on our algorithm or based on our performance of the proportionate?

Is I can be done actually. So based on that the interdisciplinary nature of the project based nature of the of the works can be extended. And as I have mentioned earlier about the biopolymers and the piece electricity from the biopolymers and these things are also some sort of interdisciplinary as in interdisciplinary thing because which we are going to use for a vibrational control which is not being attempted by many because of the complex nature.

Sort of making the materials as well. So this is the main advantage of what we have which we are going to do sort of integration. Thank you.

Thank you, Professor Abhishek. It is clear that your research holds great potential for interdisciplinary integration, particularly by leveraging advancements in metamaterials and biopolymers for vibration control. It's commendable that your approach not only simplifies control strategies but also encourages collaboration across fields like structural engineering, materials science, and mechanical systems. That concludes this section. Let us move on to the next phase.

OK.

Professor

Could you outline your three-year research roadmap and explain how it aligns with both advancing knowledge in earthquake engineering and contributing to the institutional goals of teaching, research, and outreach?

So my 333 year sales program will be mainly focusing on first of all about the biopolymers materials and its vibration manual based on the visual and other sort of.

Any other other sort of material things like?

And using natural file processor. So that will be one part of the search and the other part of the research will be mainly to develop some sort of cost effective basis systems. And the third, third aspect which I'm very much interested is to develop some sort of digital.

Digital prints for the vibration control problems, which I take it as a challenge.

And I hope I can do that too much. So that's my three-year, three-year resource plans in my.

Yeah.

Understood. How do you plan to scale your lab's activities to mentor junior students effectively while ensuring a steady pipeline of high-quality research outputs and publications?

Uh, I think, uh, for me the research means quality, not quality.

So I'm against one, uh, publishing end number of journals rather than I prefer to stick.

Uh, to some sort of less number of quality publications because I do think that publishing a lot of journals doesn't makes any sense because there should be something new in some papers rather than having some, uh, rearranging some content, publishing a new paper or salary sizing existing works to get some new papers. I don't think any advantage in any advantage is happening.

For the science in such aspects, so.

And people, friends just completing some good quality publications. So I, I think, uh, very ABA good researchers will be having at least one or two quality publications per year. So that is actually a reasonable potential mark.

Uh, rather than going for some sort of number of call quantity applications and and when we are doing some sort of research works and.

Which is quite, uh, no, quite new or quite, uh, some sort of challenging. And I think nowadays students are very much interested in taking up challenges. So I do think that when we are expressing some sort of challenging questions to them, they will take it. They, they will take it up and they will try to come up with some solution using our membership for guidance. So I do think that that would be helping.

Uh, to develop some sort of good research ambience in the institute as well. Thank you.

How do you envision leveraging international collaborations to enhance your research impact and improve citation metrics for your publications?

International collaborations will follow in the, uh, when our work is very much commendable, then I think international collaborations also will follow. And if the work is really good and people are getting inspired, the citation is also good. As I have mentioned, I am not a guy who is interested to publish some sort of 100 and some number of applications per year. For me, I don't mind that one. I just look for some doing some quality research that rather than quantity research, so. And I don't care much about the citation.

So as I have mentioned, umm.

Time