This book provides a comprehensive account of basic concepts of quantum mechanics in a coherent manner. The book is self-contained and not only covers basic concepts in quantum mechanics but also provides a basis for applications in atomic and laser physics, nuclear and particle physics, and condensed matter physics. It also covers relativistic quantum mechanics, in particular the Dirac equation and its applications.

Stem cell based therapy is a 21st century approach of therapeutic intervention which epitomizes a shift from conventional symptomatic treatment strategy to addressing the root cause of the disease process. This is especially a hope for the patients suffering from diseases such as Alzheimer, diabetes, myocardial infarction and other diseases which have always been considered as incurable. Moreover, stem cells provide excellent in vitro disease models for drug development. This book is a compilation of the bench experience of experts from various research labs involved in the cutting edge area of research, describing the use of stem cells both as part of the combinatorial therapeutic intervention approach and as tools (disease model) during drug development.

This volume is to facilitate undergraduate and graduate students in theory of relativity and help them in their studies of High Energy Physics and Cosmology. The presentation has been kept simple and sufficient details have been provided in order to facilitate the understanding of the subject. The problems have also been selected to clarify the presentation and solutions of selected problems are given for better understanding of the contents.

This is the solution manual for Riazuddin's and Fayyazuddin's Quantum Mechanics (2nd edition). The questions in the original book were selected with a view to illustrate the physical concepts and use of mathematical techniques which show their universality in tackling various problems of different physical origins. This solution manual contains the text and complete solution of every problem in the original book. This book will be a useful reference for students looking to master the concepts introduced in Quantum Mechanics (2nd edition).

The book provides a comprehensive account of particle physics linking various aspects of particle physics in a coherent manner. This self-contained book not only cover basic concepts and recent developments but also overlaps between Astrophysics, Cosmology and Particle Physics, known as astroparticle physics. Several appendices are included to make the book self-contained.

These proceedings cover the lectures delivered at the Fourth International Summer College on Physics and Contemporary Needs held from June 16 - July 4, 1979 at Nathiagali, one of the scenic hill resorts in the northern part of Pakistan. The college was organised by Pakistan Atomic Energy Commission (PAEC) and co-sponsored by the International Centre for Theoretical Physics, Trieste (ICTP), Italy. It also received a financial grant from the University Grants Commi ssion for the participation of physicists from various universities of Pakistan. The college was attended by 16 lecturers and invited seminar speakers. It was attended by 186 participants from 28 coun tries and consisted of 15 concentrated days of lectures, seminars and informal discussions. These proceedings contain only regular lectures delivered at Nathiagali but the seminars held there are listed in the Appendix. This year the college put special emphasis on various energy systems, including their long term implications, and computer software. However, the lectures delivered at the college also covered a wide spectrum of physics. The series of the colleges of which the present college is the fourth one are an attempt to remove the barrier of isolation for the physicists working in developing coun tries, far removed from active centres of research. Thus these colleges could help to fill the important gap in communication between the physicists of developing and advanced countries."

Even in this age of information explosion, Seminars and Symposia have an importance of their own, particularly in countries which are scientifically and geographically remote from active centres of learning. Our scientists suffer this isolation very acutely; the Cow ission recognises this problem and has endeavoured to solve it through organisation of meetings and conferences in Pakistan to which international specialists in different fields are invited to share their experience with colleagues in Pakistan. We find that the personal encounter and human touch still remain one of the most effective methods of transferring and sharing scientific knowledge. The International Summer College at Nathiagali held in August, 1976, also grew out of our need to communicate with each other and to identify promising areas of development relevant to the needs of a developing country. In the implementation of this idea, the Pakis tan Atomic Energy Commission received support from the International Centre for Theoretical Physics, Trieste and from the Swedish Inter national Development Authority which is gratefully acknowledged."

These proceedings cover the lectures delivered at the Third International Summer College on Physics and Contemporary Needs held from June 17 - July 5, 1978 at Nathiagali, one of the scenic hill resorts in the northern part of Pakistan. The college was organized by The Pakistan Atomic Energy Commission (PAEC) and co-sponsored by the International Centre for Theoretical Physics, Trieste (ICTP). It also received a financial grant by the University Grants Commission for the participation of physicists from various universities of Pakistan. The college was attended by 14 lecturers, 2 invited seminar speakers and 156 participants from 23 countries and consisted of 15 concen trated days of lectures, seminars and informal discussions. These proceedings contain only regular lectures delivered there, but the seminars which were held there are listed in the Appendix. This year the college put special emphasis on energy, parti cularly on nuclear energy and its role in the context of energy sys tems. However the lectures delivered at the college also covered a wide spectrum of physics. The lectures gave an overview of various topics covered at the college and emphasized the inter-disciplinary aspects of physics. Some of the lecturers also indicated the areas where research in developing countries with limited facilities could be carried out. The college had a definite objective of encouraging the physicists, part cularly those working at the universities, to apply their knowledge of physics and methodology of research to the needs of modern society."

These proceedings cover the lectures delivered at the Second International Summer College on Physics and Contemporary Needs held from June 20 - July 7, 1977 at Nathiagali, one of the scenic hill resorts in the northern part of Pakistan. The college was organised by the Pakistan Atomic Energy Commission (PAEC) and co-sponsored by the International Centre for Theoretical Physics, Trieste (ICTP). It also received a financial grant by the University Grants Commission for the participation of physicists from various universities of Pakistan. The college was attended by 13 lecturers, 7 invited semi nar speakers and 134 participants from 26 countries and consisted of 15 concentrated days of lectures, seminars-and informal discu ssions. These proceedings contain only regular lectures delivered there but. the seminars which were held are listed in the Appendix. The theme of the college covered two important aspects of science in general and physics in particular: first to provide to the participants from developing countries some of the excitement of what is happening at the frontiers of physics; secondly as the name of the college emphasises it was to encourage the physicists from developing countries to interest themselves in and to use their knowledge and methodology of research for attacking some of the problems faced by their respective countries. The lectures delivered at the college covered a wide spectrum of physics and indicated similarity of methodology used in various branches of physics as well as practical applications of some of the topics discussed."