Secretary, International Seminar on Anaphora: Form and Function, 1990 funded by the University Grants Commission
Secretary, International Seminar on Agreement, 1998 funded by the University Grants Commission
Academic Coordinator(Psycholinguistics and Sociolinguistics), Second International Conference on South Asian Languages at Punjabi University, Patiala, Punjab, 2000
Director, International Millennium Seminar on Discourse: Aspects, Issues and Themes University of Delhi, Delhi, March 13-14, 2000
Secretary, International Seminar on Applied Linguistics in a Global World, University of Delhi, Delhi, December 12-14, 2003
Director, National Seminar on Language, Mind and Society: Recent Perspectives, March 26-27, 2002
Director, National Seminar on Contemporary Perspectives on the Analysis of language, University of Delhi, Delhi, March 28-29, 2005
National Seminar on Language and Interfaces, University of Delhi, Dellhi, March 24-25, 2006
Participated in several national and international seminars, conferences and workshops and presented papers; delivered keynote addresses during more than three decades of teaching life.
Paper presentations in conferences
Presented a paper on ‘Language and the Construction of Knowledge’ at the International Seminar on Construction of Knowledge held at Vidya Bhawan Society, Udaipur on April 16-18, 2004.
Guest of Honour at the International Seminar on perspectives in Linguistics 2008 held at Kashmir University, Srinagar on November 5-6, 2008 and presented a paper on ‘Brain-Language Study: Issues and Problems’.
Attended the Ninth International Conference of South Asian Languages (ICOSAL-9) held at Punjabi University, Patiala on January 7-9, 2010. Chaired a session and presented a paper “Some Issues in Brain Evolution and Language”.
Presented a paper ‘Brain Evolution and Language’ at the International Conference of Larestan Philology and Ethnology held at Lar, Iran on March 13-15
Visiting Fellow at Department of English, Manipur University for two Weeks, 1988
Visiting Professor in Linguistics, Annamalai University for 21 days to deliver a series of lectures,1999
Visiting Fellow in Linguistics, Annamalai University for 15 days during February, 2006
Delivered lectures on Neurolinguistics at BHU, Varanasi on February 19-22, 2010
Also gave courses at Centre of Linguistics and English, J.N.U., New Delhi
Also gave a course on language and communication at Dept. of English, University of Delhi, Delhi
The Global Association of Indo-Asian Studies, held on 18th April, 2008 at Yongin Campus, HUFS, South Korea and delivered the keynote address
Delivered a Plenary Lecture Brain Evolution and Language: Reflections on Some Issues at the 2008 Spring Conference of the international Society for Chomskyan Studies held at Korea University, Seoul, South Korea on May 31, 2008, Published in the Proceedings, pp. .1-19
Delivered lectures at various universities and institutions including Dept. of English, M.D. University, Rohtak; Department of Linguistics Aligarh Muslim University, Department of Hindi, Sardar Patel University, Department of Linguistics and Culture, Bhopal University, Dept. of Hindi, Vikram University, Ujjain; Dept. of Linguistics, Kashmir University; Central Hindi Institute, New Delhi centre; Vanasthali Vidyapeeth, Department of Linguistics, Nagpur University, Nagpur; and several workshops and institutes organized by NCERT; SCERT, Haryana and SCERT, Delhi; Himachal productivity Council, Shimla. Punjabi University, Patiala; UTRC, Solan; IIIT, Allahabad; BHU and many other universities and institutions.
Conducted courses for school and college teachers in various refresher courses and training programs organized for school and college teachers at Baru Sahib, Himachal; Dalhausi, Himachal; Shimla, Himachal; Mussouri, Uttaranchal; Raj Samand, Rajasthan; UTRC, Solan; M.D. University, Rohtak; NRLC, Patiala; Ali Yavar Jung Institute for Hearing Handicapped, Delhi; Chandigarh; Kurukshetra, Haryana.
Attended several International seminars/conferences held in India and presented papers or A session Gave courses in Applied Linguistics and Stylistics at the Summer Institiutes in Linguistics at Kurukshetra University in 1978 and 1980.
Delivered talks and lectures at several institutes and universities during a period of more than three decades of academic life.
Positions in learned societies
Member, Editorial Board, Indian Linguistcs
Member, Executive Committee, Linguistic Society of India
Chief Editor, Indian Linguistics, Journal of the Linguistic Society of India 2003-2005
Life Member, Linguistic Society of India
Life Fellow, Indian Academy of Social Sciences
Academic positions and other responsibilities
Head of the Department of Linguistics, University of Delhi (twice)
Coordinator, Special Assistance Program and ASIHSS Program of the University
Grants Commission at the Department of Linguistics, University of Delhi
Dean, Faculty of Arts
Director/Coordinator of several programs of teaching Hindi as Foreign Language
in Intensive programs organized for students of University of Oslo, Norway; University of California, U.S.A.; Hankuk University, Korea; Daitobunka and Soka universities of Tokyo, Japan.
Chairman, Board of Research Studies in Humanities, University of Delhi( largest Board with nine faculties and approximately two thousand research students) (twice)
Convener, Sub-Committee(Arts) of BRSH
Chairman, Management Committee, Kothari Hostel
Member, Publication Advisory Committee of University of Delhi
Chairman, Publication Advisory Committee of University of Delhi
Member of the Governing Body of many colleges and institutions
Chairman, University Press
Member of Academic Council
Member of Executive Council
Member, University Court
Member, Academic Council, Kurukshetra University
Member of the Boards of Studies /Committee of Courses/Faculty of Kurukshetra University, Kurukshetra; Kashmir University, Shrinagar; M.D. University, Rohtak, Aligarh Muslim University, Aligarh; Banaras Hindu University, Varanasi, Nagpur University, Nagpur; Agra University, Agra, Jawaharlal Nehru University, New Delhi; Banasthali Vidyapeeth and many other universities from time to time.
Member /Convenor of UGC Panels and Committees, National Literacy Mission, Central Hindi Institute, Bureau of Indian Standards, and many committees constituted by Government, State Governements or Non-governmental organizations.
Junior Research Fellow of U.G.C. August, 1973 to December, 1975 at C.A.S.L., Deccan College, Pune.
Research Project on Language of Aasaarh kaa ek din, 1978-1980.
ICSSR major research project (with Prof. N.K. Chadha, Dept. of Psychology) on “Psycholinguistic Investigations in Aging”
Several minor projects supported by UGC or UGC SAP fund
Chapter 7 Language Evolution and the Human Brain, HSPCIC Volume XII part 6, Life and Organicism, pp. 193-211, edited by N.S. Rangaswamy and published by Centre for Studies in Civilizations, New Delhi, 2009.
Language and Construction of Knowledge, Knowledge, Language and Learning, pp. 130-135, edited by R.K. Agnihotri and H.K. Dewan, Macmillan, New Delhi, 2010.