M. H. A.  Biswas, an Invited  Talk entitled "Application of Optimal Control to Modeling the Hydrostatic Equilibrium of Relativistic Stellar Dynamics" delivered to the International Seminar on Physical and Mathematical Sciences (ISPMS-2024), organized by Calcutta Mathematical Society, WB,  India on March  2-3, 2024.

M. H. A.  Biswas, an Invited  Talk entitled "Role of Optimal Control in Modeling the Immunotherapeutic Treatment of Non-communicable Diseases" delivered to the Faculty Development Program on Recent Trend in Biomathematics and Dynamical System, Bifurcation, Chaos and Numerical Methods, organized by Department of Mathematics, MM Barrackpore, WB,  India on February  7-13, 2024.

M. H. A.  Biswas, an Special  Talk entitled "Advances of Optimal Control in Modeling the Immunotherapeutic Treatment of Chronic Diseases" delivered as an Invited Speaker to a Seminar organized by Department of Applied Mathematics, Oceanography and Computer Programming, Vidyasagar  University, Midnapore, India  on    October  14, 2023.

M. H. A.  Biswas, an Invited  Talk entitled "Optimal Control Approach for Modeling Sustainable Marine Resource Management due to Adverse Effects of Global Warming" delivered to An International Workshop on Mathematical Sciences: Some Intellectual Stimulated Topics, jointly organized by Department of Mathematics, University of North Bengal, Shiliguri, WB, India  and  Department of Mathematics, Jadavpur  University, WB, India on October  12-14, 2023. 

M. H. A.  Biswas, an Invited  Talk entitled "Optimal Control and Application to Modeling for the Optimal Immunotherapeutic Treatment of Non-communicable Diseases" delivered to the 2nd International Conference on Mathematical Analysis and Application in Modeling, organized by Department of Mathematics and Center for Mathematical Biology and Ecology, Jadavpur  University, WB, India on October  9-11, 2023.

M. H. A.  Biswas, a Keynote  Talk entitled "Optimal Control Applied to Modeling Smart Manufacturing for Sustainable Management in the Industry 4.0" delivered to the International Conference on Functional Materials for Energy and Manufacturing  2023, jointly organized by  Science Engineering and Technology  School, Khulna University, Bangladesh and  RanBal Research Institute, India on July 26, 2023.

M. H. A.  Biswas, an Invited  Talk entitled "Modeling Some Real World Problems in the Application of Engineering" delivered to the Workshop on Celebrating the International Day of Mathematics (IDM), organized by Department of Mathematics and Physics, North South University, Dhaka, Bangladesh on March  20, 2023.

M. H. A.  Biswas, Invited  as a Plenary Speaker, to deliver a Talk to the 2nd Global Summit and Expo on Mechanical and Mechatronics Engineering (GSEMME2022), Edinburgh, Scotland, on  August 25-27, 2022.

M. H. A. Biswas, an Invited Talk delivered to the Mathematics Colloquium on "Introduction to Optimal Control in Biological Models", organized by Department of Mathematics, Jahangirnagar University, Savar, Dhaka, Bangladesh and supported by Bangladesh Society for Mathematical Biology (BSMB) on March 29, 2022. 

M. H. A. Biswas, a Keynote Talk delivered to the NSRIC First Virtual International Conference on Nature Science, Education and Engineering (ICNSEE 2022), organized by World Association of Nature Science, Education and Engineering (WANSEE) and sponsored by NSRIC Inc. hosted in Toronto, Canada on February 10-11, 2022. 

M. H. A.  Biswas, a Keynote Talk  delivered to the 4th International Conference on Industrial and Mechanical Engineering and Operations Management (IMEOM 2021) organized by IEOM Society Bangladesh Chapter (IEOM-BD), Dhaka, Bangladesh held on 26 - 27 December, 2021.

M. H. A.  Biswas, an Invited  Talk delivered to the International Online Conference on Holistic Approach to Immunity to Microbial Diseases and their Treatment (HMDT 2021)  to held at Kottayam, Kerala, India on 17-19 December 2021.

M. H. A.  Biswas, a Keynote Talk delivered to the "International Conference on Mathematical Modeling in Natural Sciences, Social Sciences and Technology" organized by Department of Mathematics, Chaudhary Bansi Lal University, Bhiwani Haryana, India  on 17-18 December, 2021.

 M. H. A.  Biswas, an Invited  Talk delivered to the 22nd International Mathematics Conference  (IMC 2021) organized by Bangladesh Mathematical Society (BMS), Dhaka, Bangladesh held on 10 - 11 December, 2021.

M. H. A. Biswas, an Invited Talk delivered to the Seminar on "Optimization and Optimal Control Applied to Biological Models", organized by Department of Mathematics, University of Chittagong, Chittagong, Bangladesh on December 7, 2021.

M. H. A.  Biswas, “Optimal Control Approach for Modeling Smart Manufacturing and Sustainable Management in the Industry", a Keynote Talk  delivered as a Resource Person to the International Virtual Conference on Progress in Mathematics towards Industrial Applications, organized by Department of Mathematics,  SRM Institute of Science and Technology, Ramapuram Campus, Chennai, India on 29-30 October, 2021.

M. H. A.  Biswas, "Optimal Control Approach for Modeling the Adverse Effects of Global Warming on Sustainable Marine Resource Management", a Keynote Talk, delivered to the 27th International Conference of IAPS on Mathematical Modelling in Biological Sciences (M2BS 2021),  organized by Department of Mathematics, NIT Silchar, Assam, India on October 26-28, 2021.

M. H. A.  Biswas, "Modeling Healthcare Safety in Industrial Management during COVID-19 Pandemic", a Keynote Talk, delivered to the 3rd International Symposium on Industrial Technological Innovation Management for Global Competitiveness, organized by: BIM, IEOM-BD and Ministry of Industries, Government of Bangladesh on October 7-8, 2021.

M. H. A.  Biswas, “Dynamic Optimization for Modeling Optimal Management of Marine Resources under the Threat of Climate Change", a Keynote Talk  delivered as a Resource Person to the 10 Days Virtual International Faculty Development Program  on Frontiers of Mathematics, organized by Department of Mathematics,  SRM Institute of Science and Technology, Ramapuram Campus, Chennai, India on 19-28 July, 2021.

M. H. A.  Biswas, “Optimization for Modeling Smart Manufacturing and Process Management in the Industry 4.0 Era", an Invited Talk  delivered as a Distinguished Speaker to the First Asia Pacific International Conference on Industrial Engineering and Operations Management, organized by Harbin Institute of Technology, Harbin, China on 9-11 July, 2021.

M. H. A.  Biswas, “Mathematical Modeling for Optimal Control of COVID-19 with Combined Measures of Vaccination and Non-clinical Interventions", a Keynote Talk  delivered to the 9th International Conference on Applied Analysis and Mathematical Modeling (ICAAMM-2021) held online at Istanbul, Turkey on 11-13 June, 2021.

M. H. A.  Biswas, “Mathematical Model Applied to Green Building Concept for Sustainable Cities under Climate Change", a Keynote Talk  delivered to the 4th International Congress on Contemporary Architecture and Urban Affairs (ICCAUA  2021)  held online at the Department of Architecture, Alanya HEP University, Alanya, Turkey, on May 20-21, 2021.

M. H. A.  Biswas, “Mathematical Model Applied to Combat the New Variant of Pandemic COVID-19 with Effective Control Strategy", an Invited Talk  delivered to the International Online Seminar on "Mathematical & Medical Modelling and Forecasting the COVID-19 Pandemic" organized by Department of Mathematics, AMET Deemed to be University, Chennai, Tamil Nadu, India on May 12, 2021.

M. H. A.  Biswas, “Mathematics for Understanding the Transmission Dynamics and Control of COVID-19 Pandemic", an Invited Talk  delivered to the International Webinar on Mathematical Analysis and Its Applications (IWMAA- 2021) organized by Department of Mathematics, Tripura University, Tripura, India on April 8-9, 2021.

M. H. A.  Biswas, “Mathematical Model for Effective Control of Ongoing Battle Against COVID-19", a Keynote Talk  delivered to the Seminar on Recent Advancements in Applied Mathematics, organized by Department of Mathematics, Comilla University, Cumilla, Bangladesh on April 4, 2021.

M. H. A.  Biswas, “Mathematics for Better Preventive and Control Strategy of the COVID-19 Pandemic", an Invited Talk  delivered to an International  Seminar on the Celebration of International Day of Mathematics (IDM) 2021, organized by Bangladesh Mathematical Society, Bangladesh on March 14, 2021.

M. H. A.  Biswas, “Women and Girls in STEM Research: Achieving the SDGs", an Invited Talk  delivered to an International Seminar on the Celebration of International Women’s Day (IWD) 2021, jointly organized by IEOM-KU Student Chapter and OWSD Bangladesh National Chapter on March 8, 2021.

M. H. A.  Biswas, “Optimizing the Infection of Twindemic COVID-19 by Non-pharmaceutical Control Measures in Absence of Effective Vaccine", a Keynote Talk  delivered to the 3rd International Conference on Industrial and Mechanical Engineering and Operations Management (IMEOM 2020)  organized virtually by IEOM Society Int., Bangladesh Chapter  at Dhaka, Bangladesh on 26-27 December, 2020.

M. H. A.  Biswas, "Smooth Dynamic Optimization and Application to Mathematical Epidemiology of Emerging Diseases", a Keynote Talk  delivered to the International Webinar on "Recent Trends in Mathematics and its Applications"  organized by the Department of Mathematics, Loknete Vyakatrao Hire  Arts, Science & Commerce Collage, Panchavati, Nashik, Maharashtra, India in coordination with Marathwada Mathematical Society, Aurangabad, India on 9-11 November, 2020.

M. H. A.  Biswas, “Optimal Control Applied to Modeling the Dynamic Transmission of Emerging Infectious Diseases", an Invited Talk  delivered to the 'Two Days International Webinar on Recent Trends and Developments in Mathematics and Mathematical Sciences (RTDMMS-2020)' Organized by   the Department of Mathematics, Belda College, Paschim Medinipur, West Bengal, India on 16-17 October, 2020.

M. H. A.  Biswas, “Dynamical Systems with Optimal Control Applied to Modeling  COVID-19", an Invited Talk  delivered to the 'Webinar on Mathematics and Its Applications' Organized by   the Department of Mathematics, Chittagong University of Engineering & Technology, Chittagong , Bangladesh in collaboration with Bangladesh Mathematical Society (BMS), Dhaka, Bangladesh  on 3 October, 2020.

M. H. A.  Biswas, “Optimal Control Applied to Epidemic Models of Emerging Diseases", a Keynote Talk  delivered to the 'Digital International Conference on Applied Mathematical Sciences (DICAMS-2020)' jointly organized by Department of Applied Sciences, Parul University, Vadodara and
Department of Mathematics, Gujarat University, Ahmedabad, India on 26-27 September, 2020.

M. H. A.  Biswas, “Optimal Control in Modeling the Dynamic Transmission of Contagious Zoonotic Disease COVID-19", an Invited Talk  delivered to the 'Two Days International Webinar on Recent Advancements in Mathematical Sciences and Its Applications' organized by the Department of Mathematics, Chakdaha College, Nadia, WB, India on 3-4 September, 2020.

M. H. A.  Biswas, “Dynamic Optimization Technique in Controlling the Spread of Contagious Epidemic Zoonotic Diseases", an Invited Talk  delivered to the 'One Day Subcontinent Level Webinar on Recent Advances of Applied Mathematics' organized by the Department of Mathematics, Vivekananda Mahavidyalaya, Burdwan, WB, India on 31 August, 2020.

M. H. A.  Biswas, “Role of Mathematical Models in Understanding the Dynamic Transmission of Pandemic Outbreak of COVID-19", a Keynote Talk  delivered to the 'Webinar Series on Mathematics and its Application' organized by the Department of Mathematics, Premier University Chattogram, Chattogram, Bangladesh on 26 July, 2020.

M. H. A.  Biswas, “Advances of Biomathematics in Modeling the Control of Emerging Infectious Diseases", an Invited Talk  delivered to the 'International Web Conference on Advance Research in Science, Humanities and Social Science (IWCARSHSS 2020)' organized by the Department of Mathematics, MBB University, Agartala, Tripura, India on 9-10 July, 2020.

M. H. A.  Biswas, “Advances in the Development of Anti-cancer Therapies by Using the Immune Cells as Anti-cancer Agents: Modeling with Optimal Control", an Invited Talk  delivered to a Plenary Session of the 'One Day International Webinar on Mathematics and Its Application' organized by the Department of Mathematics, Nabadwip Vidyasagar College, WB, Kokata, India on 30 June, 2020.

M. H. A.  Biswas, “Optimal Control Applied to Stellar Models in Relativistic Dynamics", a Plenary Talk  delivered to the 'Virtual Meeting Online, of The 12th Biennial Conference on Classical and Quantum Relativistic Dynamics of Particles and Fields held at  Czech Technical University in Prague' organized by the International Association for Relativistic Dynamics (IARD), on 1-4 June, 2020.

M. H. A.  Biswas, “Optimization Technique for Modeling and Efficient Management of Infectious Diseases Transmission in Healthcare Systems", a Webinar Keynote  delivered to the Live Webinar Series 2020 organized by the Industrial Engineering and Operations Management (IEOM) Society Int., Bangladesh Chapter on 12 May, 2020.

M. H. A.  Biswas, “Mathematics in Biology and Medicine: Application to Real-life Problems", an Invited Talk  delivered to a Seminar on Mathematics is Everywhere, at The International Day of Mathematics (IDM) 2020 organized by Mathematics Discipline, Khulna University,  Khulna, Bangladesh on 14 March, 2020.

M. H. A.  Biswas, “Optimal Control Technique for Modeling the Healthcare Problems  in Biomedical Applications", an Invited Talk  delivered to the International Workshop on Recent Trends in Mathematical Biology (RTMB) 2020 organized by Bangladesh Mathematical Biology Research Group and Department of Mathematics, Jahangirnagar University,  Savar, Dhaka, Bangladesh on 14-15 January, 2020.

M. H. A.  Biswas, “Optimal Control for Modeling the Healthcare Problems", an Invited Talk  delivered to the seminar on Mathematics and Its Real-life Applications 2020 organized by the Department of Mathematics, Jagannath University,  Dhaka, Bangladesh on 13 January, 2020.

M. H. A.  Biswas, “Advances of Optimal Control for the Efficient Management in Modeling Healthcare Systems", a Keynote Talk  delivered to the 2nd International Conference on Industrial and Mechanical Engineering and Operations Management (IMEOM 2019) organized by IEOM Society Int., Bangladesh Chapter  at BIM Dhaka, Bangladesh on 12-13 December, 2019.

M. H. A.  Biswas, “Optimal Control Applied to Dynamic Models in Biomedical and Production Engineering", an Invited Talk  delivered to the Department of Computational and Theoretical Sciences,  Kulliyyah of Science, International Islamic University Malaysia (IIUM), Kuantan, Pahang, Malaysia on 2 December, 2019.

M. H. A.  Biswas, “Global Optimization of Dynamical Systems and Applications to Biomedicine and Production Management", a Keynote Talk  delivered to the 8th International Conference on Global Optimization and Its Application (ICoGOIA 2019) organized by Universiti Tun Hussein Onn Malaysia In collaboration with Indonesian Operations Research Association (IORA) held at Premeira Hotel, Kuala Lumpur, Malaysia on 23-24 November, 2019.

M. H. A.  Biswas, “Advances in Dynamic Optimization and Applications to Biomedical Modeling", an invited Talk  delivered to the International Conference on Recent Advances in Mathematics and Its Applications (ICRAMA-2019) organized by Department of Mathematics, Tripura University, Tripura, India on 16-18 July, 2019.

M. H. A.  Biswas, “Advances of Optimal Control with Constraints and Applications to Biological and Biomedical Models", an invited Talk  delivered to the National Seminar on Recent Trends in Mathematical Sciences (RTMS-2019) organized by Department of Mathematics,  The University of Burdwan, West Bengal, India on 6-7 February, 2019.

M. S. Khatun and  M. H. A. Biswas, Optimal Control Applied to Modeling the Immunotherapeutic Treatment of Leukemia, an Invited Talk delivered to the International Seminar Cum Workshop on Challenging Research by Women in STEM (CRW-STEM 2018) organized by OWSD-BD held at Dhaka, Bangladesh on 10 November, 2018.

M. H. A.  Biswas, “Modeling the Potential Impact of Climate Change on the Natural Resources of the Coastal Region of Sundarban Ecosystem in Bangladesh” an Invited Talk  delivered to the 17th CAS-TWAS-WMO Forum International Symposium on Eco-hydrology and Climate Change and International Training Workshop on Land-hydrological Processes Under Changing Climate organized by CAS-TWAS Center of Excellence for Climate and Environment Sciences (ICCES), held at Yuanchenxin International Hotel, Beijing, China on 17-21 September, 2018.

M. H. A.  Biswas, “Optimal Control Applied to Hydrostatic Equilibrium of Relativistic Stellar Models in Mathematical Physics”  an Invited Talk  delivered to the 16th Chittagong Conference on Mathematical Physics held at Jamal Nazrul Islam Research Center for Mathematical and Physical Sciences, University of Chittagong, Chittagong, Bangladesh on 18 March, 2018.

M. H. A.  Biswas, “Optimization and Optimal Control Technique: Applications  to  Modeling Healthcare Systems”  an Invited Talk  delivered to the 1st International Conference on Industrial and Mechanical Engineering and Operations Management (IMEOM 2017), jointly organized by IEOM Society of Bangladesh and IEOM Society International at the Institute of Engineers Bangladesh (IEB) Dhaka, Bangladesh  on 23-24 December, 2017. 

M. H. A.  Biswas, “ Optimal Control in Modeling the Complex Systems Arising in Biological and Biomedical Applications”  an Invited Talk  delivered to the International Conference on Geometry and Mathematical Models in Complex Phenomena (ICGMMCP-2017) organized by  Calcutta Mathematical Society, Kolkata, India on 5-7 December, 2017.

M. H. A.  Biswas, “Optimal Control Technique in Modeling the Complex Biological and Biomedical Systems Arising in Real-life Applications”,  a Plenary Lecture  delivered to the International Conference on Advances in Computational Mathematics (ICACM 2017) jointly organized by Department of Mathematics, University of Dhaka, Bangladesh and Department of Mathematics, South Asian University, New Delhi, India on 27-28 May, 2017.

M. H. A.  Biswas, “Advances of Optimal Control in Modeling Engineering and Biomedical Applications”  an Invited Talk  delivered to the International Conference on Modeling, Computing and Technological Innovations (ICMCTI-2017) organized by University Institute of Technology (UIT), Burdwan University, West Bengal, India on 23-25 March, 2017.

 M. H. A.  Biswas, “Optimization and Optimal Control: Theory and Applications”  a Keynote Talk  delivered to the Seminar on Optimization and Optimal Control: Theory and Applications jointly organized by Bangladesh Mathematical Society and Northern University of Bangladesh, Dhanmondi Campus, Dhaka on 25 February, 2017.

 M. H. A.  Biswas, “Applications of Optimal Control in Real Problems Arising in Biology and Bio-medicine” delivered an Invited talk to the Day-long Workshop on Mathematics in Real Problems jointly organized by Bangladesh Mathematical Society and Dept. of Mathematics, Pabna University of Science and Technology (PUST), Pabna, Bangladesh on 6 December, 2016.

M. H. A. Biswas, “Application of Mathematical Modeling for Sustainable Management of Marine Resources” delivered an Invited talk to the  World Ocean Day-2016 seminar on Blue Economy: Towards a Sustainable Fisheries and Marine Resources Development in Bangladesh held at Fisheries and Marine Resource Technology Discipline, Khulna University, Bangladesh on 6 June, 2016.

M. H. A. Biswas,  "Optimal Control Applied to Modeling the Immunotherapeutic Treatment for HIV Infection in Presence of State Constraint", an Invited talk to the International Conference on Applications of Mathematics to Nonlinear Sciences (AMNS-2016) organized by Association of Nepalese Mathematicians in America and Nepal Mathematical Society, Kathmandu, Nepal held on May 26-29, 201

M. H. A. Biswas, “On Some Recent Developments of Optimal Control Applied to Biology and Bio-medicine” delivered an Invited talk to the 14th Chittagong Conference on Mathematical Physics held at Jamal Nazrul Islam Research Center for Mathematical and Physical Sciences, University of Chittagong, Chittagong, Bangladesh on 16 March, 2016.

M. H. A. Biswas, “Recent Developments of Optimal Control in Epidemiology of Infectious Diseases” delivered an Invited talk to the National Conference on Computational Mathematics and Nonlinear Dynamics held at Department of Mathematics, Visva-Bharati University, Santiniketan, West Bengal, India on 19—21 February, 2016.