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Population Systems

Population Systems
Author: Alan A. Berryman
Publisher: Springer Science & Business Media
Total Pages: 228
Release: 2008-03-19
Genre: Science
ISBN: 1402068190

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This unique book is concerned with the general principles and theories of population ecology, based on the idea that the rules governing the dynamics of populations are relatively simple, and that the rich behavior we observe in nature is a consequence of the structure of the system rather than of the complexity of the underlying rules. From this perspective, the dynamic behavior of single-species populations is examined and an elementary feedback model of the population system is developed. This single-species model is refined and generalized by examining the mechanisms of population regulation.


Population Systems

Population Systems
Author: Alan A. Berryman
Publisher: Springer Science & Business Media
Total Pages: 230
Release: 2013-12-11
Genre: Medical
ISBN: 1489973257

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Dynamical Systems in Population Biology

Dynamical Systems in Population Biology
Author: Xiao-Qiang Zhao
Publisher: Springer Science & Business Media
Total Pages: 285
Release: 2013-06-05
Genre: Mathematics
ISBN: 0387217614

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Population dynamics is an important subject in mathematical biology. A cen tral problem is to study the long-term behavior of modeling systems. Most of these systems are governed by various evolutionary equations such as difference, ordinary, functional, and partial differential equations (see, e. g. , [165, 142, 218, 119, 55]). As we know, interactive populations often live in a fluctuating environment. For example, physical environmental conditions such as temperature and humidity and the availability of food, water, and other resources usually vary in time with seasonal or daily variations. Therefore, more realistic models should be nonautonomous systems. In particular, if the data in a model are periodic functions of time with commensurate period, a periodic system arises; if these periodic functions have different (minimal) periods, we get an almost periodic system. The existing reference books, from the dynamical systems point of view, mainly focus on autonomous biological systems. The book of Hess [106J is an excellent reference for periodic parabolic boundary value problems with applications to population dynamics. Since the publication of this book there have been extensive investigations on periodic, asymptotically periodic, almost periodic, and even general nonautonomous biological systems, which in turn have motivated further development of the theory of dynamical systems. In order to explain the dynamical systems approach to periodic population problems, let us consider, as an illustration, two species periodic competitive systems dUI dt = !I(t,Ul,U2), (0.


Structured-Population Models in Marine, Terrestrial, and Freshwater Systems

Structured-Population Models in Marine, Terrestrial, and Freshwater Systems
Author: Shripad Tuljapurkar
Publisher: Springer Science & Business Media
Total Pages: 660
Release: 1997-01-31
Genre: Mathematics
ISBN: 9780412072710

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Providing many examples of how models can be implemented and interpreted, this book describes the biology of the life cycle and follows the transitions of individuals through stages in the life cycle. The focus is on models as tools.


Population Balances

Population Balances
Author: Doraiswami Ramkrishna
Publisher: Elsevier
Total Pages: 373
Release: 2000-08-08
Genre: Science
ISBN: 0080539246

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Engineers encounter particles in a variety of systems. The particles are either naturally present or engineered into these systems. In either case these particles often significantly affect the behavior of such systems. This book provides a framework for analyzing these dispersed phase systems and describes how to synthesize the behavior of the population particles and their environment from the behavior of single particles in their local environments. Population balances are of key relevance to a very diverse group of scientists, including astrophysicists, high-energy physicists, geophysicists, colloid chemists, biophysicists, materials scientists, chemical engineers, and meteorologists. Chemical engineers have put population balances to most use, with applications in the areas of crystallization; gas-liquid, liquid-liquid, and solid-liquid dispersions; liquid membrane systems; fluidized bed reactors; aerosol reactors; and microbial cultures. Ramkrishna provides a clear and general treatment of population balances with emphasis on their wide range of applicability. New insight into population balance models incorporating random particle growth, dynamic morphological structure, and complex multivariate formulations with a clear exposition of their mathematical derivation is presented. Population Balances provides the only available treatment of the solution of inverse problems essential for identification of population balance models for breakage and aggregation processes, particle nucleation, growth processes, and more. This book is especially useful for process engineers interested in the simulation and control of particulate systems. Additionally, comprehensive treatment of the stochastic formulation of small systems provides for the modeling of stochastic systems with promising new areas of applications such as the design of sterilization systems and radiation treatment of cancerous tumors. A clear and general treatment of population balances with emphasis on their wide range of applicability. Thus all processes involving solid-fluid and liquid-liquid dispersions, biological populations, etc. are encompassed Provides new insight into population balance models incorporating random particle growth, dynamic morphological structure, and complex multivariate formulations with a clear exposition of their mathematical derivation Presents a wide range of solution techniques, Monte Carlo simulation methods with a lucid exposition of their origin and scope for enhancing computational efficiency An account of self-similar solutions of population balance equations and their significance to the treatment of data on particulate systems The only available treatment of the solution of inverse problems essential for identification of population balance models for breakage and aggregation processes, particle nucleation and growth processes and so on A comprehensive treatment of the stochastic formulation of small systems with several new applications


Systems Science and Population Health

Systems Science and Population Health
Author: Abdulrahman M. El-Sayed
Publisher: Oxford University Press
Total Pages: 241
Release: 2017
Genre: Medical
ISBN: 0190492392

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Reductionism at the dawn of population health / Kristin Heitman -- Wrong answers : when simple interpretations create complex problems / David S. Fink, Katherine M. Keyes -- Complexity : the evolution towards 21st century science / Anton Palma, David W. Lounsbury -- Systems thinking in population health research and policy / Stephen Mooney -- Generation of systems maps: mapping complex systems of population health / Helen de Pinho -- Systems dynamics model / Eric Lofgren -- Agent-based modeling / Brandon Marshall -- Microsimulation / Sanjay Basu -- Social network analysis : the ubiquity of social networks and their importance for population health / Douglas A. Luke, Amar Dhand, Bobbi J. Carothers -- Machine learning / James H. Faghmous -- Systems science and the social determinants of population health / David S. Fink, Katherine M. Keyes, Magdalena Cerdá -- Systems approaches to understanding how the environment influences population health and population health interventions / Melissa Tracy -- Systems of behavior and population health / Mark Orr, Kathryn Ziemer, Daniel Chen -- Systems under your skin / Karina Standahl Olsen, Hege Bøvelstad, Eiliv Lund -- Frontiers in health modeling / Nathaniel Osgood -- Systems science and population health / Abdulrahman M. El-Sayed, Sandro Galea


Complex Systems and Population Health

Complex Systems and Population Health
Author: Yorghos Apostolopoulos
Publisher: Oxford University Press
Total Pages: 336
Release: 2020-05-29
Genre: Medical
ISBN: 0190880767

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Currently, population health science is an integral part of global academic curricula. For over a century, the principles of the reductionist paradigm have guided population health curricula, training, research, and action. Researchers continue to draw upon these principles when theorizing, conceptualizing, designing studies, analyzing, and devising interventions to tackle complex population health problems. However, unresolved impasses in addressing pressing population health challenges have catalyzed calls for the integration of complex-systems-science-grounded approaches into population health science. Mounting evidence denotes that a complex systems paradigm can bring about dramatic, multipronged changes for education and training, and lead to innovative research, interventions, and policies. Despite the large and untapped promise of complex systems, the haphazard knowledge base from which academics, researchers, students, policymakers, and practitioners can draw has slowed their integration into the population health sciences. This volume fulfils this growing need by providing the knowledge base necessary to introduce a holistic complex systems paradigm in population health science. As such, it is the first comprehensive book in population health science that meaningfully integrates complex systems theory, methodology, modeling, computational simulation, and real-world applications, while incorporating current population health theoretical, methodological and analytical perspectives. It is intended as a programmatic primer across a broad spectrum of population health stakeholders: from university professors and graduate students, to researchers, policymakers, and practitioners.


A Population-Based Policy and Systems Change Approach to Prevent and Control Hypertension

A Population-Based Policy and Systems Change Approach to Prevent and Control Hypertension
Author: Institute of Medicine
Publisher: National Academies Press
Total Pages: 236
Release: 2010-08-13
Genre: Medical
ISBN: 030914809X

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Hypertension is one of the leading causes of death in the United States, affecting nearly one in three Americans. It is prevalent in adults and endemic in the older adult population. Hypertension is a major contributor to cardiovascular morbidity and disability. Although there is a simple test to diagnose hypertension and relatively inexpensive drugs to treat it, the disease is often undiagnosed and uncontrolled. A Population-Based Policy and Systems Change Approach to the Prevention and Control Hypertension identifies a small set of high-priority areas in which public health officials can focus their efforts to accelerate progress in hypertension reduction and control. It offers several recommendations that embody a population-based approach grounded in the principles of measurement, system change, and accountability. The recommendations are designed to shift current hypertension reduction strategies from an individual-based approach to a population-based approach. They are also designed to improve the quality of care provided to individuals with hypertension and to strengthen the Center for Disease Control and Prevention's leadership in seeking a reduction in the sodium intake in the American diet to meet dietary guidelines. The book is an important resource for federal public health officials and organizations, especially the Center for Disease Control and Prevention, as well as medical professionals and community health workers.


Atlas of Global Change Risk of Population and Economic Systems

Atlas of Global Change Risk of Population and Economic Systems
Author: Peijun Shi
Publisher: Springer Nature
Total Pages: 283
Release: 2022
Genre: Agriculture-Economic aspects
ISBN: 9811666911

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This book is open access and illustrates the spatial distribution of the global change risk of population and economic systems with the maps of environment, global climate change, global population and economic systems, and global change risk. The risks of global change are mapped at 0.25 degree grid unit. The risk results and their contribution rates of the world at national level are unprecedentedly derived and ranked. The book can be a good reference for researchers and students in the field of global climate change and natural disaster risk management, as well as risk managers and enterpriser to understand the global change risk of population and economic systems. .


Systems Science and Population Health

Systems Science and Population Health
Author: Abdulrahman M. El-Sayed
Publisher: Oxford University Press
Total Pages: 304
Release: 2017-02-01
Genre: Medical
ISBN: 0190492414

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Population health is complex and multileveled, encompassing dynamic interactions between cells, societies, and everything in between. Our typical approach to studying population health, however, remains oriented around a reductionist approach to conceptualizing, empirically analyzing, and intervening to improve population health. The trouble is that interventions founded on simplifying a complex world often do not work, sometimes yielding failure or, even worse, harm. The difficult truth is that "silver bullet" health science often fails, and understanding these failures can help us improve our approach to health science, and, ultimately, population health. SYSTEMS SCIENCE AND POPULATION HEALTH employs principles from across a range of sciences to refine the way we understand population health. By augmenting traditional analytic approaches with new tools like machine learning, microsimulation, and social network analysis, population health can be studied as a dynamic and complex system. This allows us to understand population health as a complex whole, offering new insights and perspectives that stand to improve the health of the public. This text offers the first educational and practical guide to this forward-thinking approach. Comprising 17 chapters from the vanguard of population health, epidemiology, computer science, and medicine, this book offers a three-part introduction to the subject: · An intellectual and conceptual history of systems science as it intersects with population health · Concise, introductory overviews of important and emerging methodological tools in systems science, including systems dynamics, agent-based modeling, microsimulation, social network analysis, and machine-learning-all with relevant examples drawn from population health literature · An exploration of future implications for systems science and its applications to our understanding of population health issues For researchers, students, and practitioners, SYSTEMS SCIENCE AND POPULATION HEALTH redefines many of the foundational elements of how we understand population health. It should not be missed.