Bad comments about oneself are generally not heard directly. However, good comments are sometimes directly written or told to the person concerned. Here, I share some of those good moments, and hope that these will help me to develop/strengthen GOOD relationships with the readers of these opinions.

1. Teacher-Students (8)^[1]

• An M. Tech student (graduated in May 2011) while working for John Deere, Pune:  Mr. Joel Keishing

On 2012-09-05 09:58, joel keishing wrote:

Hi Sir,
You have enlightened me all through, today what I am is just because of you. Thank you.
Happy Teachers Day.

Regards,
Joel Keishing

• A B. Tech student (graduating in May 2011) while working for ISRO, Thiruvananthapuram:  Mr. Abhijeet Rahore

Subject My Experiences
Sender Abhijeet Rathore
Recipient SK Saha <saha@mech.iitd.ac.in>
Date 25.01.2012 00:13

Dear Sir,
I hope this mail finds you in good health. A very happy and prosperous new year to you and your family. As you know I have joined ISRO through campus recruitment and been placed at Thiruvananthapuram.
....
At this point of time, I would like to thank you for your valuable guidance during all my four years at IIT Delhi. The things you taught us about professionalism and being a good engineer are making much more sense now. And I find myself not entirely new to these concepts, thanks to you. All the things that you tried to inculcate in the robotics club, as well as in us, are easily visible in every good engineer here, and hence I find myself a step ahead than other new recruits.
...
I sincerely believe that many more good engineers will graduate from IIT Delhi under your guidance. Once again I want to thank you for helping me become a better engineer. I hope to find mentors like you in the future.

Sincerely
Abhijeet Rathore
Scientist/Engineer 'SC'
VSSC, ISRO, Trivandrum

• An M. Tech student after getting a job in May 2010: Mr. M. Anil Kumar

From: "anil kumar"
Subject: Regarding loom project discussion
Date: Mon, May 24, 2010 4:33 pm
To: saha@mech.iitd.ac.in

Respected sir,
Sir, i got selected in TimeTooth Technoligies Ltd which is CAE based company sir the Loom project which i did was so much contributed to get the job and they are so much impressed with the way the work been carried out i.e. i told about the maintaining project dairy and weekly meetings moreover showing interest rural application with use of advanced technology.
Thank you very much.

Regard,
Anil Kumar M.

• After completing B. Tech from IIT Delhi in May 2009: Mr. Aseem Singla

Subject: Enjoying my work at ISRO
From: "Aseem Singla"
Date:  Tue, December 22, 2009 11:53 pm

Sir,
I have started my work at ISRO Chandigarh Centre after 2 months of job training at different centre.
…
I will be visiting Delhi on 27th and 28th. I would like to meet with you to share with you the progress i have made till now
...
Thank you sir for your precious time. I always feel motivated when i meet you.
--
Regards
Aseem Singla
Mechanical Engineer, IIT Delhi

• After teaching the course “MEL832: Multibody Systems and Vibration Design” to M. Tech students of IIT Delhi, Jan.-Apr., 2009: Mr. Vijay Hirwani (writes in the feedback form of the course)

One of the best courses I have ever credited.
Liked: Everything about this course; Disliked: Its only a one semester course

• After completion of Robocon 2009 competition held in Pune: Mr. Akhil Kulkarni, Student of IIT Madras

From: Akhil Kulkarni
Sent: 09 March 2009 19:13
To: Subir Kumar Saha
Subject: Regarding Robocon-IITM

Dear Sir,
We are happy to inform you that we won Robocon 2009.
I would like to thank you for all that you did for us. Without your guidance, it would not have been possible for us to reach this level. The things that you told me during the discussion that we had in October 2008 were implemented and it really helped us to attack the robocon competition.
We would like to thank the IIT Delhi robocon team for for giving us full support during the competition.
Now, we have an even bigger challenge of representing India in the international competition and we would like receive guidance from you.
We are really grateful to you for inspiring and guiding us. If possible, I would like to talk to you over phone.

Regards,
Akhil Kulkarni

• Farewell function after one-year tenure as Professor in the Dept. of Engineering Design, IIT Madras (Nov. 30, 2007): Fifth semester students of Dual-degree program (2005 entry)+ Others (On the blackboard)

Teachers are those who use themselves as bridges, over which they invite their students to cross. Then having facilitated their crossing, joyfully collapse, encouraging them to create bridges of their own.
Thanks to Prof. SAHA, for he has enlightened us in many ways.

• After teaching the course "MEL731: Mechanisms and Manipulators" to M. Tech students of IIT Delhi, July-Nov., 2006: Mr. Sandeep Kumar

Subject: HAPPY NEW YEAR
From: "sandeep kumar"
Date: Mon, December 31, 2007 7:30pm

Respected sir,
how are you sir?I want you wish you happy new year and wish to tell you that you just take our one subject but I think one most important concept of life what you taught us was really important and i will never forget it.once in class you said that"be a good human being,have some principles and follow them,be punctual and be truthfull toward your duties".thank you very much sir.
with love and respect

sandeep kumar(Mtech-2nd year)

2. Supervisor-Student (4)

• An M. Tech student after getting a job in Tata Motors in Jan. 2012: Ms. Jyoti Bahuguna

Subject Re: Comment on RuTAG and paper for ASME conf.
Sender Jyoti Bahuguna
Recipient saha <saha@mech.iitd.ac.in>
Date 15.01.2012 23:43

Hello sir,
The interview was completely technical. It took about 35- 40 minutes. They asked about the project of B.Tech, M.tech. Main focus was on 'how you can apply your knowledge of M.Tech project in Tata Motors'. They asked a number of questions related to this..but not a single one from book. and at the end they said though you are good in robotics but we are not looking for the robotic expertise. This was the turning point. i asked so what are you looking for?? they answered - PRODUCT DEVELOPMENT. As a reply i said "as you said i am good at robotics but that doesn't mean i don't know how to develop a product." They immediately asked me to justify this.i told i am working on some extra project under the same guide. We are a team of 4-5 people and we work on weekends. These projects are mainly for the rural development. One is the design and analysis of Animal driven prime mover. Then they asked any other project?i said recently we have got an project on 'Carpet loom Design' from Ministry of Textile. The government has decided to give about 20000 looms to some places of U.P. and Jharkhand like Mirjapur and Bhadoi on subsidy basis. So they want us to check their design and let them know whether the design is safe or not. then they asked me to draw the loom, and asked how u will design the beam. Basically they were interested in knowing how you will convert a real life problem to a standard problem of 'a beam under some load' .They asked me to draw the beam...Then they asked why that type of loading and boundary conditions... I answered and they said 'Good'...with this the technical interview was over. After this we discussed about the joining place etc..

CONCLUSION: RuTAG project helped me a lot to fetch this job. Basically in converting their 'No' to 'Yes'. As per my experience if anyone indulge oneself in such projects, one learns how to utilize the knowledge what has been learned in class in solving real life problems. These projects has taught me the very basic but the most important tool of design i.e.modelling a problem on the basis of loading and boundary conditions. Moreover it gives a satisfaction of doing at least something for your own people using what you know....It takes just a few hours of your week and returns a lot.

• A B. Tech student after graduating in May 2011 and while studying in Univ. of Michigan, USA: Mr. Danvir Singh Sethi

Subject Re: Happy New Year and article for Robotics Newsletter
Sender Danvir Singh
Recipient saha <saha@mech.iitd.ac.in>, Subir Kumar Saha <sahaiitd@gmail.com>
Date 06.01.2012 12:03

Dear Prof Saha,
Happy New Year to you too Sir..
....
I had been planning to write a long email to you as well about my experiences here at Michigan, how the experience has been, how the Robotics Club has helped me develop skills that are very useful elsewhere as well, but couldnt get the time to sit down and write one.
....
I felt that the teaching methodology here is much better as they give a lot of emphasis on assignments, which are not so straightforward and are time consuming but really useful for learning the course in-depth. I understand now how you also gave a lot of emphasis on assignments in your course (MEL731) and that it is always useful.
....
Thanks.
Regards,
Danvir Singh Sethi
B.Tech., Mechanical Engineering, IIT Delhi, 2007-11
M.S., Mechanical Engineering, Univ of Michigan, 2011-13

• After receiving the reports from the Ph. D thesis examiners (Oct. 30, 2007): Mr. Himanshu Chaudhary, Ph. D student

From: H Chaudhary
Sent: Fri 02-Nov-07 6:31 PM

Respected sir,
…
Sir, you are not only the excellent researcher but also a high valued person. I am grateful to you for making me a man of DYNAMICS.
…
Regards,
Himanshu

• Comments form an Ex Ph.D Student (Dr.Abdullah Aamir Hayat)  

Good evening sir, 

Hope everything is good at your end. 
Today during a public lecture here, I quoted you and your teachings. 
For a person like me how I was, learning under you by looking at the demonstration of most of the things you said, was a life time learning for me. 
I always think how much effort you give to correct a person, and if that person gets convince by the greater picture that you try to impart, then it's very useful for him.
I was lucky to have you as a guide and guru who gave direction to many of my thought process.
I miss those weekly meeting session in which I learnt many life principal.
Thank you once again to take so much effort in correcting us.

Looking forward to meet your guide during this ICRA in Canada.

Will take some time on this coming Sunday to talk with you.

Convey my Regards to Mam.

Best Regards

 

3. Speaker-Audience (10)

• After the invited speech in "IE(I) All India Seminar on Recent Advances in Robotics and Mechatronic,s," Kolkata, Aug. 19-20, 2011: Mr. Kashmir Kumar Mallik, Co-Chairman

Sir,
…. Your presentations were highly appreciated from all the corners. …
Kashmir Lal Mallik

• After an invited lecture in a Workshop in Jadavpur Univ., Kolkata, July 16, 2011: Dr. Ranjit Kumar Barai, Reader, Dept. of Elect. Eng., Jadavpur Univ., Kolkata

From: "ranjit barai"
Date: Tue, July 26, 2011 3:26 pm

Respected Prof. Saha
...
Your lecture has created a long lasting impression not only on my mind but also on the mind of the participants. They have given very frank feedback and requested me to arrange some sort of seminar or workshop in near future and invite you for giving such talk. I have told them I am also keen to arrange such event. I also hope that you will again accept our invitation when I shall arrange such event.
....
Ranjit

• After a  lecture in a Workshop in Jadavpur Univ., Kolkata, July 16, 2011: Mr. Rajesh Kumar Bhushan, Faculty in the School of Mech. Eng., Shri Mata Vaishno Devi University, Jammu

From: "Rajesh Kumar Bhushan"
To: saha@mech.iitd.ac.in

Sir
On the last day of mechatronics course at jadavpur university participants were asked to speak about the course. Most of the participants appreciated your presentation. Your lecture on mechatronics and related systems during UGC course was very informative. You explained in detail about the subject. I learned a lot during the lecture. Software developed for teaching robotics subject is very useful. It makes understanding of subject easy. Efforts of team who is developing this software are really appreciable.
with regards
--
Rajesh Kumar Bhushan

• On the lecture series, “Robotics[AT]?” based on RoC-BEE (Robotics Competition Based Education in Engineering) concept (Delivered 38 times since Mar.’07 at IIT Madras) [3]
  
  • After 42nd lecture in BTOTSAV (Student Festival of BIT Meshra), Ranchi, Feb. 26, 2012: Dr. P.R. Thakura, Assoc. Prof., Dept. of Elect. & Electronics. Eng.

2012-02-27 15:00
Dear Sir
Your talk on robotics was fantastic and absorbing.
Dr. P R Thakura

• After the keynote lecture at Nat. Workshop on Mechanisms, Robotics, Mechatronics, HIT Haldia, Mar. 19, 2009: Mr. Soumyabrata Chandra,  Student, HIT Haldia (West Bengal)

From: "soumyabrata chandra"
To: saha@mech.iitd.ac.in
Subject: SOUMYABRATA FROM HALDIA INST. OF TECH.
Date: Monday, March 23, 2009 3:20 AM

respected sir,
i am soumyabrata chandra from haldia inst. Of technology,final year mechanical engg student.
last 19.03.2009 i enjoyed a great estacy of your lecture. first time I realised from your lecture that how game and compititive attitude can add a great value in our study. but one sentence of  your speach  has changed my attitude a lot that is "BE AN EXPERTISE INDIAN EITHER OUR COUNTRY WILL BE TECHNICALY WEAK". i decided not to go for CAT and finance companies.I will try my best to be an expert in my trade.we just need a liitle inspiration from you people who are dedicated to the service of the nation.
one reply mail from you wiil be a life time asset to me.JAI HIND.

• After the keynote lecture at Nat. Conf. on Mechanism Sc.  and Tech., ME Dept. NIT Hamirpur,  Nov. 13-14, 2008: Mr. Prasanna Kannappan, Student, NIT Rourkela

From: Prasanna Kannappan
Sent: 17 January 2009 23:58
To: saha@mech.iitd.ac.in
Subject: RoC-BEE

Dear Prof Saha,
I am a 6th Sem, B.Tech Mechanical student of NIT Rourkela  contacting with reference to the inspiring RoC-BEE presentation of yours which I witnessed in NIT Hamirpur. The small talk which me and my friends had with you in private further invigorated us.
Several robotics enthusiasts in our institute are eager to hear your words. I on behalf of our robotics club Cyborg would like to invite you to our institute and deliver your wonderful RoC-BEE initiative. This would also help us to structure our first Robocon team.
I will arrange for an official invitation based on your convenience with regards to date and time.
Eagerly awaiting to hear your willingness.
With Regards,
K.Prasanna

• After the 7th lecture (Tutorial in the "Nat. Conf. on Computer Vision, AI and Robotics," SRM University, Kancheepuram,, Oct. 03, 2007): Prof. Jayati Ghosal, Head, Dept. of Comp. Sc., and Convenor of the conference

From: Dr. jayati Ghoshal
Sent: Sat 06-Oct-07 10:17 AM
To: Subir Kumar Saha

Dear Prof Saha,
people considered your tutorial of very high standard ! Thanks again for conducting a tutorial of such standard.
regards,
jayati Ghoshal
Professor and Head,
Department of Computer Science and Engineering,
SRM Institute of Science and Technology

• On the lecture series "Multibody Dynamics for Rural Applications (MuDRA)" [Formerly known as "Modeling and Analyses of Rural Engineering Problems (MAREP)"]: A Research Direction” (Delivered 11 times since June 04’07 at SVNIT, Surat) [3]
  
  • After the 6th lecture (Workshop on "Mechatronics and Micro-Machining" GVP Coll. of Eng., Vishakhapatnam, May 21, 2008): Mr. P. Sreekanth, Faculty, Dept. of Mech. Eng., GVP Coll. of Eng., Visakhapatnam

From: "Srikanth Pattela"
Date: Mon, June 9, 2008 8:50 pm

sir
This is srikanth . I have attended the recent workshop conducted by you in vuisakhapatanam in gayatri college of engineering. your lectures are very inspiring.
I have also talked with prof & head A.B.Koteswar rao, and I have decided to learn the subject of multi body dynamics.
...
P.S. Sreekanth

• After a conference in NIT Surat: Prof. R.V. Rao, Head, Dept. of Mech. Eng., and Coordinator of the conference

From: ravipudi rao Sent: Thu 07-Jun-07 1:50 PM
Sir,
Thank you very much for the nice mail. The participants and the students were very much impressed by your presentation. We will be in touch.........
With sincere regards,
R.Venkata Rao

• Mr. Sandeep Deshmukh, Faculty participant

From: sandip deshmukh
Sent: Thu 07-Jun-07 11:52 AM

Dear Dr.Saha Sir,
Kindly accept my regards. I became your fan after attending your key note lecture on MAREP which is a need of the day.  … You are one of those Indians who are giving something to the rest of the world today to follow tomorrow.
As per our small interaction at Surat, where you showed the way of getting the technical guidance & funding for the research projects, we are rejuvenated to continue the further research in the field of Stair Climbing Transporter.
…
With regards,
Sandeep Deshmukh

4. Faculty-Faculty (2)

• Prof. G. Chirikjian of John Hopkis Univeristy of USA uses Saha's order (n) algorithms in his two courses. 
• On encouragement of making a team of UG students to participate in Robocon 2009: Dr. P.M. Pathak, Faculty, IIT Roorkee

From: "Pushparaj Mani Pathak"
To: "S.K. Saha" <saha@mech.iitd.ac.in>
Date: Saturday, March 21, 2009 6:36 PM

Dear Sir,
I am told that they could won only one match which was against a team from bangalore. The second match was against MIT Pune and they lost it. I have asked them to submit a report next by next week. The experience of guidance has been good. The students were self motivated. I am happy that we have now sufficient infrastructure based on which we can participate in future events. I thank you for motivating and guiding us.
with regards
P.M.Pathak, Ph.D.

5. Researcher-Researcher (3)

• A faculty from NIT Rourkela who saw my DST project proposal which is shered in my website for benefit of young researchers. 
  
  Subject:Letter of Gratitude
  From: Shubhobrata Rudra
  Date: Thu, July 19, 2018 5:48 pm

Respected Sir,

                       Presently, I am busy in compilation of my first project proposal on Synchronization of networked control nonlinear underactuated mechanical agents. I want to submit it for Early Career Research Award Scheme. Initially, I have faced many difficulties, in fact I was perplexed with somewhat complicated requirements of the funding agencies. However, your sample project write-up format (attached with this email) has helped me a lot to understand the art of writing a project proposal. Thank you sir for your kind support and suggestions that you put forward for the betterment of all the novice investigator.  

 

With regards,

S. Rudra

• After the Indo-US Workshop on Spatial Kinematics & Protein Conformations, IISc, Bangalore, Dec. 10-11, 2007: Prof. G. Chirikjian, Prof.  John Hopkins, Univ., USA, and Co-coordinator

Subject: nice meeting you
From: "Greg Chirkjian"
Date: Sun, December 16, 2007 9:03pm

Dear Prof. Saha.
Nice meeting you at IISc last week. Enclosed is the paper that I mentioned in which we adapt your algorithm to address the mass-matrix-determinant problem in polymers.
We also have a paper coming out on our own method  that develops an O(n) method based on Lie groups:
K. Lee, Y. Wang and G. S. Chirikjian, "O(n) Mass Matrix Inversion for Serial Manipulators and Polypeptide Chains using Lie derivatives," Robotica (in press)
Regards, Greg

Excerpt from "patriciu04.pdf"

JOURNAL OF CHEMICAL    PHYSICS VOLUME 121, NUMBER 24    22 DECEMBER 2004
Analysis of the conformational dependence of mass-metric tensor
determinants in serial polymers with constraint
Alexandru Patriciu, Gregory S. Chirikjian,a) and Rohit V. Pappub)
Department of Mechanical Engineering, Johns Hopkins University, Baltimore, Maryland 21218
and Department of Biomedical Engineering and Center for Computational Biology,
Washington University in St. Louis, Campus Box 1097, St. Louis, Missouri 63130
……
APPENDIX: DETAILS OF SAHA’S ALGORITHM
The decomposition of  Gs in Eq. (30) to ….

• Message from a researcher in the USA (Sender’s name is removed for privacy reason)

Sub: Extended applications of DeNOC 
11 October 2018 at 03:06 
To: sahaiitd@gmail.com

Dear Professor Saha,

I am the …. who appears at the bottom of a couple of your papers. I've been retired now for over a decade but I still play around with multibody dynamics. A few days ago I was searching the Internet for some specific MBD information when I came across a few of your papers related to "Decoupled Natural Orthogonal Complement (DeNOC)- based dynamic modeling of mechanical systems." Initially I didn't have a clue what that was all about because I'd never heard of Natural Orthogonal Complement matrices, even though it looks like I'd been working with them almost since the day my thesis adviser sent me a copy of Featherstone's thesis back in May of 1984.

Needless to say, after spending a few minutes scanning through a few of your papers I realized that you had accomplished some things I'd been trying to do on and off for more than three decades.

… (some texts removed)

My thoughts were always that this method of generating the natural factors, based on Featherstone's algorithm, was not very efficient, so I plan to compare my method step by step with yours to see which is more efficient.

 In the attached papers I was more interested in achieving increased computational performance, such as using iterative refinement to reduce the frequency of computing the natural factors, and providing a way of iteratively solving the equations of motion with kinematic loops and Lagrange multipliers. Now I'm more interested in applying your methods to more efficiently obtain symbolic factors of the matrix and more efficiently solving for the Lagrange multipliers.

… (some texts removed)

You have demonstrated techniques to obtain more general O(n) solutions, and I will attempt to understand and incorporate some of them into my formulation and algorithms. Having scanned through the steps you perform, I believe it may even be possible in general to reduce the operations count even more than what you indicate. I'll let you know what I learn.

Best Regards,

… (Sender's name removed)

6. Technology Developer-Industry (1)

• On development and research on the Carpet Looms: Mr. Aadil Jeelani, Kashmir

Subject: INDIAN CARPET WEAVING LOOM STRUCTURE-From Kashmir-India
From: "Aadil jeelani"
Date: Wed, January 16, 2008 10:53 am

Dear Sir,
Greetings from Kashmir,India.
Hope you are fine.It was nice talking to you.
I have gone through your design published in Journal of Scientific and Industrial Research,CSIR,India about Optimal Design of an Indian Carpet Weaving Loom Structure.It is a great work and contribution by you towards Indian Carpet Industry.
…
Best Regards
Aadil Jeelani
CELL PHONE:09419007776
Address:
Jeelani House,Haider Colony,Lane 4,H 19,
Upper-Soura,Srinagar,Kashmir-190020-India.

7. Author-Audience (2)

• After meeting in IFToMM Congress in Guanajuato, June 19-24, 2011, and sharing the book RoCK-BEE: Prof. J.M. McCarthy, Univ. of California, Irvine, USA

From: "Michael McCarthy"
Date; Fri, July 1, 2011 10:51 am
To: saha@mech.iitd.ac.in

SK, Great to meet you in Guanajuato.  Your experiences with your robotics project is exactly the experience that I am having with my racecar projects. I have just had a meeting with high school administrators who are surprised and excited to hear that this is possible for their students too. I believe it is the right thing for
our engineering students and the right thing for our high school students.  It creates a foundation of experience that helps students understand the great science and technology that we have developed over the years.
Mike

• After the five-day workshop for Class X students of Kendrya Vidyalaya, JNU Campus, New Delhi, May 24-28, 2011, and sharing the book RoCK-BEE: Ms. Manisha Kumari

On Wed, June 22, 2011 2:58 pm, manisha kumari wrote:

respected sir,
ROCKBEE is a very interesting and humorous book but behind this humour is the hidden inspiration and the little secrets to achieve many milestones in our life. Every time when i read this book i feel as if i am reading it first time. I enjoyed reading this book.
THANKING YOU
YOURS FAITHFULLY
MANISHA KUMARI
 

8. In Professional Relationships (8)

• A Technical staff in the Department of Mechanical Engineering at IIT Delhi after several industrial trips arranged by me as Head of the department.
  
  Subject: Industry visits and training arranged for the ME Engg. Staff in 2017
  From: A Technical Staff in the ME Deptt. of IIT Delhi
  Date: Fri, July 27, 2018 09:49 am
  
  ​​Hello Sir,

This mail revised memories of all the industrial visits which were really informative. I was really amazed to see Jet Engine Overhaul Complex in particular.....it was beyond my imagination. I really appreciate you for taking interest in organizing these visits to widen our knowledge.

Best regards,

---

• After completion of tenure as the Head of the Department of Mechanical Engineering at IIT Delhi during July 1, 2015 to August 31, 2018. 

Last updated: Dec. 01, 2018

^[1] Number inside the brackets ( ) indicates the number of comments.