Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.

Among the several distinct ways of formulating and quantizing a Hamiltonian system, the light cone approach enjoys special status because it has the largest stability group. The aim of this volume is to present recent achievements and open problems in this rather unusual quantization framework to a large audience. The formulation is set up in a comprehensive introduction where the issues are also clearly indicated with specific examples: vacuum structure, signature of non-perturbative effects, chiral symmetry breaking, light cone gauge theories, etc. The following chapters address these topics through a selection of the most relevant contributions presented at Les Houches.
This volume should prove valuable to newcomers in the field, and graduates and academics.

In a companion volume to their highly acclaimed book Overcoming the Odds, Emmy E. Werner and Ruth S. Smith continue their longitudinal study of approximately five hundred men and women who were born in 1955 on the Hawaiian island of Kauai. A third of these individuals had been considered "at risk" because of birth complications, parental mental illness, family dysfunction, and adverse early conditions such as poverty. Werner and Smith examine the long-term impact of these influences on the individuals' later adaptation to life.Drawing on data collected by a team of psychologists, pediatricians, social workers, and public health nurses across four decades, Werner and Smith chronicle the development of these men and women from birth to midlife: infancy, early and middle childhood, late adolescence, and early and middle adulthood. Their book focuses on protective factors within the individual, the extended family, and the community that allowed most of the men and women to be successful and to be satisfied with their lives by age forty. Most important, the authors document the remarkable resilience and capacity for recovery displayed by the majority of these baby boomers, who approached middle age as competent, confident, and caring adults. Journeys from Childhood to Midlife highlights key turning points in the third and fourth decades of life, and shows why more women than men succeeded in overcoming the odds. The work addresses the policy implications of the research and the need to evaluate and improve the effectiveness of current intervention programs for children.

In den zuruckliegenden Jahren haben in London (1973), Louvain-Ia-Neuve (1975) und New York (1977) 3 Symposien uber die Biochemie der beiden Eisenstoffwechselproteine Ferritin und Transferrin stattgefunden. Die rasche Aufeinanderfolge der Tagungen zu einem so eng umrissenen Themenkreis dokumentiert ein neu erwachtes Interesse an den bioche- mischen und biologisch-medizinischen Aspekten dieser eisenspezifischen Proteine. Zu dieser Intensivierung des Interesses verschiedener wissenschaftlicher Fachgebiete hat die Entdeckung beigetragen, dass Ferritin entgegen fruherer Auffassung in geringer Konzen- tration ein normaler Bestandteil des zirkulierenden Blutes ist und sich als Mass fur die Beurteilung der Koerpereisenreserven eignet. Das Serumferritin ist damit zu einem fur die medizinische Diagnostik wertvollen Para- meter geworden und hat Eingang in die Routinediagnostik auf verschiedenen Gebieten der klinischen Medizin gefunden. Das vorliegende Buch fasst die Beitrage zu einem am 13. und 14. Oktober 1978 in Frank- furt am Main unter der Schirmherrschaft der Deutschen Gesellschaft fur Hamatologie und Onkologie durchgefuhrten Internationalen Symposium uber methodische und klini- sche Aspekte des Serumferritins zusammen. Die Herausgeber haben sich bemuht, die in den Referaten und in der Diskussion sicht- bar gewordenen Differenzen zu zahlreichen Problemen der Serumferritinbestimmung in ihrer kontroversen Form wiederzugeben, da dem Symposium das Ziel gesetzt war, eine erste Zusammenfassung vor allem der klinischen Erfahrungen mit dem neuen Eisen- stoffwechselparameter Serumferritin zu geben. Es hat sich gezeigt, dass trotz unterschied- licher Auffassungen in der Beurteilung der Wertigkeit des Serumferritins in der klinischen Anwendung diesem Parameter schon jetzt ein bedeutender Stellenwert fur die Bewertung des Koerpereisenstatus zukommt.