Antonino Zichichi – författare

Peter Gabriel Bergmann started his work on general relativity in 1936 when he moved from Prague to the Institute for Advanced Study in Princeton. Bergmann collaborated with Einstein in an attempt to provide a geometrical unified field theory of gravitation and electromagnetism. Within this program they wrote two articles together: A. Einstein and P. G. Bergmann, Ann. Math. 39, 685 (1938) ; and A. Einstein, V. Bargmann and P. G. Bergmann, Th. von Karman Anniversary Volume 212 (1941). The search for such a theory was intense in the ten years following the birth of general relativity. In recent years, some of the geometrical ideas proposed in these publications have proved essential in contemporary attempts towards the unification of all interactions including gravity, Kaluza-Klein type theories and supergravity theories. In 1942, Bergmann published the book "Introduction to the Theory of Relativity" which included a foreword by Albert Einstein. This book is a reference for the subject, either as a textbook for classroom use or for individual study. A second corrected and enlarged edition of the book was published in 1976. Einstein said in his foreword to the first edition: "Bergmann's book seems to me to satisfy a definite need. . . Much effort has gone into making this book logically and pedagogically satisfactory and Bergmann has spent many hours with me which were devoted to this end.

This is a presentation of the progress and current problems in the early universe, cosmic microwave background radiation, large scale structure formation, and the interplay between them. The emphasis is on the mutual impact of fundamental physics and cosmology, both at theoretical and experimental (observational) levels within a deep, well-focused and well-defined programme. The nature of the domain itself leads to different aspects, approaches and points of view on the same topic. Special care has been taken to provide the reader the basis of the different, sometimes competing lines of research.

This text provides an understanding of current progress and problems in the study of the early universe, cosmic microwave background radiation, large-scale structure and the dark matter problem. The emphasis is on the mutual impact of fundamental physics and cosmology at both theoretical and experiments/observational levels. The very nature of the subject area calls for the study of different aspects, using different approaches and points of view. However, the book provides a well-defined programme and a global, unifying view, bringing together experimentalists and theoreticians, physicists, astrophysicists and astronomers from a variety of backgrounds. The lectures range from a motivation and pedagogical introduction for students and those not directly working in the field, to the latest developments and the most recent results.

From 5 to 15 August 1984, a group of 79 physicists from 61 laboratories in 26 countries met in Erice for the 22nd Course of the International School of Subnuclear Physics. The countries represented were Austria, Belgium, Brazil, Bulgaria, Canada, People's Republic of China, Denmark, the Federal Republic of Germany, France, Greece, Hungary, Iran, Israel, Italy, Japan, Korea, Malaysia, Mexico, the Netherlands, Pakistan, Poland, Sweden, Switzerland, Turkey, the United Kingdom, the United States of America. The School was sponsored by the Italian Ministry of Public Education (MPI), the Italian Ministry of Scientific and Technologi­ cal Research (MRST), the Regional Sicilian Government (ERS), and the Weizmann Institute of Science. The programme of the School was devoted to a review of the most significant results in theoretical and experimental research work on the interactions between what we believe today are the point like constituents of the world: quarks and leptons. It should however not be forgotten that many problems are still to be understood: especially in the forefront of the correla­ tion between quarks and leptons. This game started in 1966 with the proposal for "leptonic quarks" and went on with "preons" and "rishons" just to quote the most famous attempts to unify these two worlds.

From 5 to 15 August 1984, a group of 79 physicists from 61 laboratories in 26 countries met in Erice for the 22nd Course of the International School of Subnuclear Physics. The countries represented were Austria, Belgium, Brazil, Bulgaria, Canada, People''s Republic of China, Denmark, the Federal Republic of Germany, France, Greece, Hungary, Iran, Israel, Italy, Japan, Korea, Malaysia, Mexico, the Netherlands, Pakistan, Poland, Sweden, Switzerland, Turkey, the United Kingdom, the United States of America. The School was sponsored by the Italian Ministry of Public Education (MPI), the Italian Ministry of Scientific and Technologi­ cal Research (MRST), the Regional Sicilian Government (ERS), and the Weizmann Institute of Science. The programme of the School was devoted to a review of the most significant results in theoretical and experimental research work on the interactions between what we believe today are the point like constituents of the world: quarks and leptons. It should however not be forgotten that many problems are still to be understood: especially in the forefront of the correla­ tion between quarks and leptons. This game started in 1966 with the proposal for "leptonic quarks" and went on with "preons" and "rishons" just to quote the most famous attempts to unify these two worlds.

In July 1975 a group of 122 physicists from 68 laboratories of 27 countries met in Erice to attend the 13th Course of the International School of Subnuc1ear Physics. The countries represented at the School were: Australia, Austria, Belgium, Brazil, Canada, Chile, Denmark, France, Germany, Greece, India, Iran, Israel, Italy, Japan, Mexico, The Netherlands, Norway, Poland, Portugal, Spain, Sweden, Switzerland, Turkey, The United Kingdom, The United States of America and Yugoslavia. The School was sponsored by the Italian Ministry of Public Education (MPI), the Italian Ministry of Scientific and Technolog­ ical Research (MRST) , the North Atlantic Treaty Organization (NATO), the Regional Sicilian Government (ERS) and the Weizmann Institute of Science. The School was one of the most exciting, due to the impressive number of discoveries made not only in the field of the new par­ ticles by the MIT-BNL (reported by S. C. C. Ting) and by the SLAC­ SPEAR (reported by M. Breidenbach) Groups, but also in the field of high energy neutrino interactions where Carlo Rubbia observes ~­ pairs, together with bumps in the total energy of the hadronic system at Wh~4 GeV and a discontinuity in the at Ev~50 GeV plus a bump at Wmin~4 GeV; all these phenomena being possibly connected. To this remarkable amount of new and exciting results it has to be added the great discovery of DORIS (reported by B. Wiik) on the first example of a new particle Pc: the highlight of the Course.

In July 1975 a group of 122 physicists from 68 laboratories of 27 countries met in Erice to attend the 13th Course of the International School of Subnuc1ear Physics. The countries represented at the School were: Australia, Austria, Belgium, Brazil, Canada, Chile, Denmark, France, Germany, Greece, India, Iran, Israel, Italy, Japan, Mexico, The Netherlands, Norway, Poland, Portugal, Spain, Sweden, Switzerland, Turkey, The United Kingdom, The United States of America and Yugoslavia. The School was sponsored by the Italian Ministry of Public Education (MPI), the Italian Ministry of Scientific and Technolog­ ical Research (MRST) , the North Atlantic Treaty Organization (NATO), the Regional Sicilian Government (ERS) and the Weizmann Institute of Science. The School was one of the most exciting, due to the impressive number of discoveries made not only in the field of the new par­ ticles by the MIT-BNL (reported by S. C. C. Ting) and by the SLAC­ SPEAR (reported by M. Breidenbach) Groups, but also in the field of high energy neutrino interactions where Carlo Rubbia observes ~­ pairs, together with bumps in the total energy of the hadronic system at Wh~4 GeV and a discontinuity in the at Ev~50 GeV plus a bump at Wmin~4 GeV; all these phenomena being possibly connected. To this remarkable amount of new and exciting results it has to be added the great discovery of DORIS (reported by B. Wiik) on the first example of a new particle Pc: the highlight of the Course.

In July 1975 a group of 122 physicists from 68 laboratories of 27 countries met in Erice to attend the 13th Course of the International School of Subnuclear Physics. The countries represented at the School were: Australia, Austria, Belgium, Brazil, Canada, Chile, Denmark, France, Germany, Greece, India, Iran, Israel, Italy, Japan, Mexico, The Netherlands, Norway, Poland, Port4gal, Spain, Sweden, Switzerland, Turkey, The United Kingdom, The United States of America and Yugoslavia. The School was sponsored by the Italian Ministry of Public Education (MPI) , the Italian Ministry of Scientific and Technolog­ ical Research (MRST), the North Atlantic Treaty Organization (NATO), the Regional Sicilian Government (ERS) and the Weizmann Institute of Science. The School was one of the most exciting, due to the impressive number of discoveries made not only in the field of the new par­ ticles by the MIT-BNL (reported by S. C. C. Ting) and by the SLAC­ SPEAR (reported by M. Breidenbach) Groups, but also in the field of high energy neutrino interactions where Carlo Rubbia observes ~­ pairs, together with bumps in the total energy of the hadronic system at Wh~4 GeV and a discontinuity in the at Ev~50 GeV plus a bump at Wmin~4 GeV; all these phenomena being possibly connected. To this remarkable amount of new and exciting results it has to be added the great discovery of DORIS (reported by B. Wiik) on the first example of a new particle Pc: the highlight of the Course.

During July 1991. a group of 99 physicists from 57 laboratories in 27 countries met in Erice for the 29th Course of the International School of Subnuclear Physics. The countries represented were: Algeria. Argentina. Austria. Brazil. Canada. China. France. Germany. Greece. India. Ireland. Israel. Italy. New Zealand. Norway. Pakistan. Poland. Portugal. Rumania. Spain. Sweden. Switzerland. Thailand. Turkey. The Union of Soviet Socialist Republics. the United Kingdom. and the United States of America. The School was sponsored by the European Physical Society (EPS). the Italian Ministry of Education (MPI). the Italian Ministry of University and Scientific Research. the Sicilian Regional Government (ERS). and the Weizmann Institute of Science. The opening lecture of the School was given by Professor Lev Okun. A few remarks are in order. In the pre-Gorbachev era. Professor Okun's case was the most difficult: in spite of many invitations he was not allowed to come and lecture at Erice. Nowadays the hard times have nearly been forgotten. It is with pleasure that I recall here a discussion I had with my friend Lev Okun in my house during one of his rare visits to CERN. The after-dinner topic was Galileo Galilei and his great discovery; i. e . • the equality between gravitational and inertial masses - a discovery that we are celebrating now. four hundred years later. Here is a synthesis of Professor Okun's position: given a massive particle. the only quantity we should consider when talking about masses.

During July 1990. a group of 83 physicists from 43 laboratories in 21 countries met in Erice for the 28th Course of the International School of Subnuclear Physics. The countries represented were: Algeria. Canada. Chile. China. Czechoslovakia. Denmark. France. the Federal Republic of Germany. Greece. Holland. India. Italy. Pakistan. Peru. Poland. Sweden. Switzerland. Turkey. the Union of Soviet Socialist Republics. the United Kingdom. and the United States of America. The School was sponsored by the European Physical Society (EPS). the Italian Ministry of Education (MPI). the Italian Ministry of University and Scientific Research. the Sicilian Regional Government (ERS). and the Weizmann Institute of Science. The new topic discussed in some detail at the School was QCD phenomenology at 200 TeV. This energy frontier represents the goal for subnuclear physics after LHC and sse. The main lecturers were T.D. Lee. L. Cifarelli. Y. Dokshitzer and A. Ringwald. There are two possibilities. one optimistic. the other pessimistic. LHC and SSC can produce remarkable discoveries. In this case. the need to go to higher energies will be obvious. In the pessimistic case. LHC and SSC will produce the strongest evidence for the validity of the Standard Model. The need for higher energies will be impelled. In neither case can we wait. If the 200 TeV frontier is to be reached within our lifetime we need to start now: thinking and preparing the tools. Theory and R&D for future detectors are the basic points of the 200 TeV frontier.

During July-August 1989. a group of 75 physicists from 52 laboratories in 16 countries met in Erice for the 27th Course of the International School of Subnuclear Physics. The countries represented were: Austria. Bulgaria. Canada. China. Denmark. France. the Federal Republic of Germany. Hungary. India. Italy. Pakistan. Poland. Switzerland. United Kingdom. and the Union of the Soviet Socialist Republics and the United States of America. The School was sponsored by the European Physical Society (EPS). the Italian Ministry of Education (MPI). the Italian Ministry of Scientific and Technological Research (MRST). the Sicilian Regional Government (ERS). and the Weizmann Institute of Science. In addition to some crucial problems in the Superworld Theory. developed by S. Ferrara and L. Hall. the School was focused on the most advanced topics which have attracted our attention during the last year. These are of a phenomenological nature: the problem of the spin inside the proton (G. Altarelli). some crucial QCD tests (R. Baldini-Celio and S. Brodsky). the jet phenomenology as predicted by QCD (Y. Dokshitzer); and of basic (therefore by far more difficult to solve) value. such as the understanding of the fundamental constants of Nature (G. Veneziano) and the new ideas on the cosmological constant (A. Stominger and G. Veneziano).

During July 1991. a group of 99 physicists from 57 laboratories in 27 countries met in Erice for the 29th Course of the International School of Subnuclear Physics. The countries represented were: Algeria. Argentina. Austria. Brazil. Canada. China. France. Germany. Greece. India. Ireland. Israel. Italy. New Zealand. Norway. Pakistan. Poland. Portugal. Rumania. Spain. Sweden. Switzerland. Thailand. Turkey. The Union of Soviet Socialist Republics. the United Kingdom. and the United States of America. The School was sponsored by the European Physical Society (EPS). the Italian Ministry of Education (MPI). the Italian Ministry of University and Scientific Research. the Sicilian Regional Government (ERS). and the Weizmann Institute of Science. The opening lecture of the School was given by Professor Lev Okun. A few remarks are in order. In the pre-Gorbachev era. Professor Okun''s case was the most difficult: in spite of many invitations he was not allowed to come and lecture at Erice. Nowadays the hard times have nearly been forgotten. It is with pleasure that I recall here a discussion I had with my friend Lev Okun in my house during one of his rare visits to CERN. The after-dinner topic was Galileo Galilei and his great discovery; i. e . • the equality between gravitational and inertial masses - a discovery that we are celebrating now. four hundred years later. Here is a synthesis of Professor Okun''s position: given a massive particle. the only quantity we should consider when talking about masses.

During July 1990. a group of 83 physicists from 43 laboratories in 21 countries met in Erice for the 28th Course of the International School of Subnuclear Physics. The countries represented were: Algeria. Canada. Chile. China. Czechoslovakia. Denmark. France. the Federal Republic of Germany. Greece. Holland. India. Italy. Pakistan. Peru. Poland. Sweden. Switzerland. Turkey. the Union of Soviet Socialist Republics. the United Kingdom. and the United States of America. The School was sponsored by the European Physical Society (EPS). the Italian Ministry of Education (MPI). the Italian Ministry of University and Scientific Research. the Sicilian Regional Government (ERS). and the Weizmann Institute of Science. The new topic discussed in some detail at the School was QCD phenomenology at 200 TeV. This energy frontier represents the goal for subnuclear physics after LHC and sse. The main lecturers were T.D. Lee. L. Cifarelli. Y. Dokshitzer and A. Ringwald. There are two possibilities. one optimistic. the other pessimistic. LHC and SSC can produce remarkable discoveries. In this case. the need to go to higher energies will be obvious. In the pessimistic case. LHC and SSC will produce the strongest evidence for the validity of the Standard Model. The need for higher energies will be impelled. In neither case can we wait. If the 200 TeV frontier is to be reached within our lifetime we need to start now: thinking and preparing the tools. Theory and R&D for future detectors are the basic points of the 200 TeV frontier.

During July-August 1989. a group of 75 physicists from 52 laboratories in 16 countries met in Erice for the 27th Course of the International School of Subnuclear Physics. The countries represented were: Austria. Bulgaria. Canada. China. Denmark. France. the Federal Republic of Germany. Hungary. India. Italy. Pakistan. Poland. Switzerland. United Kingdom. and the Union of the Soviet Socialist Republics and the United States of America. The School was sponsored by the European Physical Society (EPS). the Italian Ministry of Education (MPI). the Italian Ministry of Scientific and Technological Research (MRST). the Sicilian Regional Government (ERS). and the Weizmann Institute of Science. In addition to some crucial problems in the Superworld Theory. developed by S. Ferrara and L. Hall. the School was focused on the most advanced topics which have attracted our attention during the last year. These are of a phenomenological nature: the problem of the spin inside the proton (G. Altarelli). some crucial QCD tests (R. Baldini-Celio and S. Brodsky). the jet phenomenology as predicted by QCD (Y. Dokshitzer); and of basic (therefore by far more difficult to solve) value. such as the understanding of the fundamental constants of Nature (G. Veneziano) and the new ideas on the cosmological constant (A. Stominger and G. Veneziano).

During August 1986. a group of 96 physicists from 61 laboratories in 17 countries met in Erice for the 24th Course of the International School of Subnuclear Physics. The countries represented were: Austria. Bulgaria. Belgium. Denmark. France. the Federal Republic of Germany. Hungary. Israel. Italy. Poland. Portugal. South Africa. Spain. Sweden. Switzerland. United Kingdom. United States of America. The School was sponsored by the European Physical Society (EPS). the Italian Ministry of Education (MPI). the Sicilian Regional Government (ERS). and the Weizmann Institute of Science. I hope the reader will enjoy this book as much as the students enjoyed attending the lectures and the discussion Sessions. which are the most attractive features of the School. Thanks to the work of the Scientific Secretaries. the discussions have been reproduced as faithfully as possible. At various stages of my work I have enjoyed the collaboration of my friends whose contributions have been extremely important for the School and are highly appreciated. I thank them most warmly. A final acknowledgement to all those who. in Erice. Bologna. Rome and Geneva. helped me on so many occasions and to whom I feel very much indebted.

During August 1986. a group of 96 physicists from 61 laboratories in 17 countries met in Erice for the 24th Course of the International School of Subnuclear Physics. The countries represented were: Austria. Bulgaria. Belgium. Denmark. France. the Federal Republic of Germany. Hungary. Israel. Italy. Poland. Portugal. South Africa. Spain. Sweden. Switzerland. United Kingdom. United States of America. The School was sponsored by the European Physical Society (EPS). the Italian Ministry of Education (MPI). the Sicilian Regional Government (ERS). and the Weizmann Institute of Science. I hope the reader will enjoy this book as much as the students enjoyed attending the lectures and the discussion Sessions. which are the most attractive features of the School. Thanks to the work of the Scientific Secretaries. the discussions have been reproduced as faithfully as possible. At various stages of my work I have enjoyed the collaboration of my friends whose contributions have been extremely important for the School and are highly appreciated. I thank them most warmly. A final acknowledgement to all those who. in Erice. Bologna. Rome and Geneva. helped me on so many occasions and to whom I feel very much indebted.

During A:.lgust 1987. a group of 76 physicists from 51 laboratories in 22 countries met in Erice for the 25th Course of the International School of Subnuclear Physics. The countries represented were: Austria. Bulgaria. Canada. Chile. China. Colombia. Czechoslovakia. France. Federal Republic of Germany. Greece. Hungary. India. Italy. Lebanon. The Netherlands. Poland. Portugal. Spain. Sweden. Switzerland. United Kingdom. and the United States of America. The School was sponsored by the European Physical Society (EPS). the Italian Ministry of Public Education (MPI). the Italian Ministry of Scientific and Technological Research (MRSI). the Sicilian Regional Government (ERS). and the Weizmann Institute of Science. This is the 25th anniversary of the School and. for the second time. the programme has been mainly devoted to the Superworld. Needless to say that the Superworld appears to be. at present. very far from the experimental axis. Nevertheless. the Superworld is a fascinating field of modern physics: we ought to know what boils in the heads of our theoretical colleagues. keeping in mind that the source of basic truth is. and will remain. experimental physics. Relevant news in experimental physics was scarce in the past year and the most interesting results have been reported. The future has also been presented with LEP. Gran Sasso. HERA: projects to become operative by 1000; and ELOISATRON as the driving force for Europe to keep a central role in Subnuclear Physics.

During A:.lgust 1987. a group of 76 physicists from 51 laboratories in 22 countries met in Erice for the 25th Course of the International School of Subnuclear Physics. The countries represented were: Austria. Bulgaria. Canada. Chile. China. Colombia. Czechoslovakia. France. Federal Republic of Germany. Greece. Hungary. India. Italy. Lebanon. The Netherlands. Poland. Portugal. Spain. Sweden. Switzerland. United Kingdom. and the United States of America. The School was sponsored by the European Physical Society (EPS). the Italian Ministry of Public Education (MPI). the Italian Ministry of Scientific and Technological Research (MRSI). the Sicilian Regional Government (ERS). and the Weizmann Institute of Science. This is the 25th anniversary of the School and. for the second time. the programme has been mainly devoted to the Superworld. Needless to say that the Superworld appears to be. at present. very far from the experimental axis. Nevertheless. the Superworld is a fascinating field of modern physics: we ought to know what boils in the heads of our theoretical colleagues. keeping in mind that the source of basic truth is. and will remain. experimental physics. Relevant news in experimental physics was scarce in the past year and the most interesting results have been reported. The future has also been presented with LEP. Gran Sasso. HERA: projects to become operative by 1000; and ELOISATRON as the driving force for Europe to keep a central role in Subnuclear Physics.

During August 1988. a group of 67 physicists from 45 laboratories in 17 countries met in Erice for the 26th Course of the International School of Subnuclear Physics. The countries represented were: Australia. Austria. Canada. China. Czechoslovakia. Denmark. France. Federal Republic of Germany. India. Italy. Poland. Portugal. Spain. Sweden. Switzerland. United Kingdom. and the United States of America. The School was sponsored by the European Physical Society (EPS). the Italian Ministry of Public Education (MPI). the Sicilian Regional Government (ERS). and the Weizmann Institute of Science. The interest in the Superworld is still very high. This is why. for the third year. the Erice School has been devoted. to a great extent. to review the many developments in Superstring. Supermembranes with their problems of quantization and compactification. All these theoretical speculations are very far from the experimental frontier. In order to keep our feet on the ground. a series of lectures was included to cover the status of CP violation. of the Heavy Leptons. together with the projects for new physics at Gran Sasso and Fermi Lab. For completeness. Julian Schwinger reviewed the great problem of Anomalies in Quantum Field Theory and Shelly Glashow gave a closing lecture on the end of Superworld. If nothing new happens. next year there will be no Superworld in Erice.

During August 1988. a group of 67 physicists from 45 laboratories in 17 countries met in Erice for the 26th Course of the International School of Subnuclear Physics. The countries represented were: Australia. Austria. Canada. China. Czechoslovakia. Denmark. France. Federal Republic of Germany. India. Italy. Poland. Portugal. Spain. Sweden. Switzerland. United Kingdom. and the United States of America. The School was sponsored by the European Physical Society (EPS). the Italian Ministry of Public Education (MPI). the Sicilian Regional Government (ERS). and the Weizmann Institute of Science. The interest in the Superworld is still very high. This is why. for the third year. the Erice School has been devoted. to a great extent. to review the many developments in Superstring. Supermembranes with their problems of quantization and compactification. All these theoretical speculations are very far from the experimental frontier. In order to keep our feet on the ground. a series of lectures was included to cover the status of CP violation. of the Heavy Leptons. together with the projects for new physics at Gran Sasso and Fermi Lab. For completeness. Julian Schwinger reviewed the great problem of Anomalies in Quantum Field Theory and Shelly Glashow gave a closing lecture on the end of Superworld. If nothing new happens. next year there will be no Superworld in Erice.

The contemporary trends in the quantum unification of all interactions including gravity motivate this Course. The main goal and impact of modern string theory is to provide a consistent quantum theory of gravity. This, Course is intended to provide an updated understanding of the last developments and current problems of string theory in connection with gravity and the physics at the Planck energy scale. It is also the aim of this Course to discuss fundamental problems of quantum gravity in the present-day context irrespective of strings or any other models. Emphasis is given to the mutual impact of string theory, gravity and cosmology, within a deep a well defined programme, which provides, in addition, a careful interdisciplinarity. Since the most relevant new physics provided by strings concerns the quantization of gravity, we must, at least, understand string quantization in curved space-times to start. Curved space-times, besides their evident relevance m classical gravitation, are also important at energies of the order of the Planck scale. At the Planck energy, gravitational interactions are at least as important as the rest and can not be neglected anymore. Special care is taken here to provide the grounds of the different lines of research in competition (not just only one approach); this provides an excellent opportunity to learn about the real state of the discipline, and to learn it in a critical way.

An up-to-date presentation of the progress and current problems in the early universe, cosmic microwave background radiation, large scale structure formation, and the interplay between them. The emphasis is on the mutual impact of fundamental physics and cosmology, both at theoretical and experimental (observational) levels within a deep, well- focused and well-defined programme. The nature of the domain itself leads to different aspects, approaches and points of view on the same topic. Special care has been taken to provide the reader the basis of the different, sometimes competing lines of research. All contributions are uniformly excellent, with a careful selection of the subjects and approaches covered, presenting a unifying and rigorous view of the field. Audience: experimentalists and theoreticians from a variety of backgrounds: physics, astrophysics and astronomy. An excellent reference for post-doctoral scientists. Useful for senior scientists and advanced graduate students.

This NATO Advanced Study Institute course provided an updated understanding, from a fundamental and deep point of view, of the progress and current problems in the early universe, cosmic microwave background radiation, large-scale struc­ ture, dark matter problem, and the interplay between them. Emphasis was placed on the mutual impact of fundamental physics and cosmology, both at the theo­ retical and experimental or observational levels, within a deep and well defined programme, and a global unifying view, which, in addition, provides of careful inter-disciplinarity. In addition, each course of this series introduced and promoted topics or sub­ jects which, although not of a purely astrophysical or cosmological nature, were of relevant physical interest for astrophysics and cosmology. Deep understanding, clarification, synthesis, and careful interdisciplinarity within a fundamental physics framework, were the main goals of the course. Lectures ranged from a motivation and pedagogical introduction for students and participants not directly working in the field to the latest developments and most recent results. All lectures were plenary, had the same duration, and were followed by a discus­ sion. The course brought together experimentalists and theoreticans physicists, astro­ physicists and astronomers from a wide variety of backgrounds, including young scientists at the post-doctoral level, senior scientists and advanced graduate stu­ dents as well.

The contemporary trends in the quantum unification of all interactions including gravity motivate this Course. The main goal and impact of modern string theory is to provide a consistent quantum theory of gravity. This, Course is intended to provide an updated understanding of the last developments and current problems of string theory in connection with gravity and the physics at the Planck energy scale. It is also the aim of this Course to discuss fundamental problems of quantum gravity in the present-day context irrespective of strings or any other models. Emphasis is given to the mutual impact of string theory, gravity and cosmology, within a deep a well defined programme, which provides, in addition, a careful interdisciplinarity. Since the most relevant new physics provided by strings concerns the quantization of gravity, we must, at least, understand string quantization in curved space-times to start. Curved space-times, besides their evident relevance m classical gravitation, are also important at energies of the order of the Planck scale. At the Planck energy, gravitational interactions are at least as important as the rest and can not be neglected anymore. Special care is taken here to provide the grounds of the different lines of research in competition (not just only one approach); this provides an excellent opportunity to learn about the real state of the discipline, and to learn it in a critical way.

An up-to-date presentation of the progress and current problems in the early universe, cosmic microwave background radiation, large scale structure formation, and the interplay between them. The emphasis is on the mutual impact of fundamental physics and cosmology, both at theoretical and experimental (observational) levels within a deep, well- focused and well-defined programme. The nature of the domain itself leads to different aspects, approaches and points of view on the same topic. Special care has been taken to provide the reader the basis of the different, sometimes competing lines of research. All contributions are uniformly excellent, with a careful selection of the subjects and approaches covered, presenting a unifying and rigorous view of the field. Audience: experimentalists and theoreticians from a variety of backgrounds: physics, astrophysics and astronomy. An excellent reference for post-doctoral scientists. Useful for senior scientists and advanced graduate students.

This NATO Advanced Study Institute course provided an updated understanding, from a fundamental and deep point of view, of the progress and current problems in the early universe, cosmic microwave background radiation, large-scale struc­ ture, dark matter problem, and the interplay between them. Emphasis was placed on the mutual impact of fundamental physics and cosmology, both at the theo­ retical and experimental or observational levels, within a deep and well defined programme, and a global unifying view, which, in addition, provides of careful inter-disciplinarity. In addition, each course of this series introduced and promoted topics or sub­ jects which, although not of a purely astrophysical or cosmological nature, were of relevant physical interest for astrophysics and cosmology. Deep understanding, clarification, synthesis, and careful interdisciplinarity within a fundamental physics framework, were the main goals of the course. Lectures ranged from a motivation and pedagogical introduction for students and participants not directly working in the field to the latest developments and most recent results. All lectures were plenary, had the same duration, and were followed by a discus­ sion. The course brought together experimentalists and theoreticans physicists, astro­ physicists and astronomers from a wide variety of backgrounds, including young scientists at the post-doctoral level, senior scientists and advanced graduate stu­ dents as well.

For the Galvani Bicentenary Celebrations, the University of Bologna and its Academy of Sciences singled out subnuclear physics as the field of scientific research to be associated with this important event, as it would best illustrate, for the new generation of students, the challenge inherent in fundamental sciences.Subnuclear physics was born 50 years ago and has represented, ever since, the new frontiers of Galilean science. In his opening lecture delivered on the first day of the new academic year, Professor Antonino Zichichi analytically reviewed the basic conceptual developments and main discoveries achieved in subnuclear physics during the last 50 years. Given the importance of this field of fundamental research, Professor Zichichi was invited to expand the contents of his lecture into a book, and the outcome is this invaluable volume.