The PA Flora Database (PFD) has its roots in the work of Edgar Wherry, John Fogg, Jr., and Herbert Wahl, the "Atlas of the Flora of PA", pub. by the Morris Arboretum of the Univ. of PA. Over a period of 40 years, Wherry and his colleagues gathered data from the major PA herbaria and manually placed a quarter of a million dots on over 3,500 maps, which are reproduced in this volume. The checklist of included taxa has undergone extensive review to reflect recent taxonomic and nomenclatural revisions. Recent discoveries have been added and distribution data has been updated. This volume also includes collections made in the 1990s in conjunction with the PA Natural Diversity Inventory. Extensive illustrations. Reprinted 1996.
Neonatal intensive care has been one of the most morally controversial areas of medicine during the past thirty years. This study examines the interconnected development of four key aspects of neonatal intensive care: medical advances, ethical analysis, legal scrutiny, and econometric evaluation. The authors assert that a dramatic shift in societal attitudes toward newborns and their medical care was a stimulus for and then a result of developments in the medical care of newborns. They divide their analysis into three eras of neonatal intensive care. The first, characterized by the rapid advance of medical technology from the late 1960s to the Baby Doe case of 1982, established neonatal care as a legitimate specialty of medical care, separate from the rest of pediatrics and medicine. During this era, legal scholars and moral philosophers debated the relative importance of parental autonomy, clinical prognosis, and children's rights. The second era, beginning with the Baby Doe case (a legal battle that spurred legislation mandating that infants with debilitating birth defects be treated unless the attending physician deems efforts to prolong life "futile"), stimulated efforts to establish a consistent federal standard on neonatal care decisions and raised important moral questions concerning the meaning of "futility" and of "inhumane" treatment. In the third era, a consistent set of decision-making criteria and policies was established. These policies were the result of the synergy and harmonization of newly agreed upon ethical principles and newly discovered epidemiological characteristics of neonatal care. Tracing the field's recent history, notable advances, and considerable challenges yet to be faced, the authors present neonatal bioethics as a paradigm of complex conversation among physicians, philosophers, policy makers, judges, and legislators which has led to responsible societal oversight of a controversial medical innovation.
[C]learly a book that every Rocky Mountain botanist should own." -Arctic and Alpine Research Colorado Flora: Eastern Slope describes the remarkable flora of the state, distinctive in its altitudinal range, numerous microhabitats, and ancient and rare plants. Together with Colorado Flora: Western Slope, Fourth Edition, these volumes are designed to educate local amateurs and professionals in the recognition of vascular plant species so that they can be better stewards of our priceless and irreplaceable biological heritage. These thoroughly revised and updated editions reflect current taxonomic knowledge. The authors describe botanical features of this unparalleled biohistorical region and its mountain ranges, basins, and plains and discuss plant geography, giving detailed notes on habitat, ecology, and range. The keys contain interesting anecdotes and introductions for each plant family. Each volume includes a background of botanical work in the state, a complete glossary, indices to common and scientific names, references and suggested readings, and hundreds of illustrations. The books also contain a new contribution from Donald R. Farrar and Steve J. Popovich on moonworts. The fourth editions of Colorado Flora: Eastern Slope and Colorado Flora: Western Slope are ideal for both student and scientist and essential for readers interested in Colorado's plant life.
Colorado Flora: Western Slope describes the remarkable flora of the state, distinctive in its altitudinal range, numerous microhabitats, and ancient and rare plants. Together with Colorado Flora: Eastern Slope, Fourth Edition, these volumes are designed to educate local amateurs and professionals in the recognition of vascular plant species and encourage informed stewardship of our biological heritage. These thoroughly revised and updated editions reflect current taxonomic knowledge. The authors describe botanical features of this unparalleled biohistorical region and its mountain ranges, basins, and plains and discuss plant geography, giving detailed notes on habitat, ecology, and range. The keys contain interesting anecdotes and introductions for each plant family. The book is rounded out with historical background of botanical work in the state, suggested readings, glossary, index to scientific and common names, references, and hundreds of illustrations. The books also contain a new contribution from Donald R. Farrar and Steve J. Popovich on moonworts. The fourth editions of Colorado Flora: Eastern Slope and Colorado Flora: Western Slope are ideal for both student and scientist and essential for readers interested in Colorado's plant life.
[C]learly a book that every Rocky Mountain botanist should own." -Arctic and Alpine Research Colorado Flora: Eastern Slope describes the remarkable flora of the state, distinctive in its altitudinal range, numerous microhabitats, and ancient and rare plants. Together with Colorado Flora: Western Slope, Fourth Edition, these volumes are designed to educate local amateurs and professionals in the recognition of vascular plant species so that they can be better stewards of our priceless and irreplaceable biological heritage. These thoroughly revised and updated editions reflect current taxonomic knowledge. The authors describe botanical features of this unparalleled biohistorical region and its mountain ranges, basins, and plains and discuss plant geography, giving detailed notes on habitat, ecology, and range. The keys contain interesting anecdotes and introductions for each plant family. Each volume includes a background of botanical work in the state, a complete glossary, indices to common and scientific names, references and suggested readings, and hundreds of illustrations. The books also contain a new contribution from Donald R. Farrar and Steve J. Popovich on moonworts. The fourth editions of Colorado Flora: Eastern Slope and Colorado Flora: Western Slope are ideal for both student and scientist and essential for readers interested in Colorado's plant life.
This work covers geology and vegetation of the vascular plants of the Yukon Territory. It should be of interest to botanical scientists, students and travellers interested in biodiversity, and for rare and endangered species wildlife management.
This comprehensive introduction to rock mechanics treats the basics of rock mechanics in a clear and straightforward manner and discusses important design problems in terms of the mechanics of materials. This extended second edition includes an additional chapter on Rock Bursts and Bumps, a part on Basics Dynamics, and has numerous additional examples and exercises throughout the chapters. Developed for a complete class in rock engineering, this volume uniquely combines the design of surface and underground rock excavations and addresses: • rock slope stability in surface excavations, from planar block and wedge slides to rotational and toppling failures • shaft and tunnel stability, ranging from naturally-supported openings to analysis and design of artificial support and reinforcement systems • entries and pillars in stratified ground • three-dimensional caverns, with emphasis on cable bolting and backfill • geometry and forces of chimney caving, combination support and trough subsidence • rock bursts and bumps in underground excavations, with focus on dynamic phenomena and on fast and sometimes catastrophic failures. The numerous exercises and examples familiarize the reader with solving basic practical problems in rock mechanics through various design analysis techniques and their applications. Supporting the main text, appendices provide supplementary information about rock, joint, and composite properties, rock mass classification schemes, useful formulas, and an extensive literature list. The large selection of problems at the end of each chapter can be used for home assignment. A solutions manual is available to course instructors. Explanatory and illustrative in character, this volume is suited for courses in rock mechanics, rock engineering and geological engineering design for undergraduate and first year graduate students in mining, civil engineering and applied earth sciences. Moreover, it will form a good introduction to the subject of rock mechanics for earth scientists and engineers from other disciplines.
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