Modeling And Measurement Of Contact Resistances

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Analysis of Contact Resistance Change of Embroidered Interconnections

Author : Erik Simon
Publisher : diplom.de
ISBN 13 : 3836638711
Total Pages : 116 pages
Book Rating : 4.8/5 (366 download)

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Book Synopsis Analysis of Contact Resistance Change of Embroidered Interconnections by : Erik Simon

Download or read book Analysis of Contact Resistance Change of Embroidered Interconnections written by Erik Simon and published by diplom.de. This book was released on 2009-11-20 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inhaltsangabe:Einleitung: Integration von Elektronik in Textilien ist ein Thema, das zunehmend in den Blickpunkt verschiedener Forschungsinstitute und Unternehmen rückt. Für diese sehr aktuelle Technik werden allerdings bisher nur herkömmliche Methoden der Verdrahtung verwendet. Um die Beschaffenheit eines Textils nicht zu verändern, und damit den Tragekomfort und das Erscheinungsbild nicht negativ zu beeinflussen, müssen neue Technologien verwendet werden. Ein Ansatz ist die Verwendung von gesticktem, elektrisch leitfähigem Garn. Dieses hat die gleichen mechanischen Eigenschaften wie herkömmliche Garne und stellt damit keinen Fremdkörper in einem Textil dar. Zusätzlich leitet es den elektrischen Strom und kann direkt durch Sticken mit einem elektronischen Modul verbunden werden. Dadurch dient das Garn als elektrischer Leiter für Signale und kann gleichzeitig eine Verbindung zu elektronischen Modulen herstellen. In vorangegangenen Forschungsprojekten wurde die Machbarkeit und Zuverlässigkeit von gestickten Kontakten untersucht. Es hat sich gezeigt, dass das Ankontaktieren und Verbinden von Substraten mit elektrisch leitfähigen Fäden eine mögliche Alternative zu den herkömmlichen Verdrahtungstechniken darstellt. Allerdings zeigten sich starke Schwankungen und auch Ausfälle der gemessenen Kontakwiderstände während der Zuverlässigkeitstests. Die vorliegende Arbeit befasst sich mit den Ursachen der Widerstandschwankungen und Ausfälle von gestickten Kontakten. Ziel ist es, diese zu analysieren und gezielt Verbesserungsvorschläge zu machen. Die erhöhte Zuverlässigkeit der verbesserten Kontakte soll abschließend im Experiment validiert werden. Anfangs werden die thermomechanischen und elektrischen Eigenschaften des verwendeten Garns analysiert und der Zusammenhang beider Größen erläutert. Dies geschieht auf Basis von thermomechanischen Analysen und Widerstandsmessungen, sowohl bei konstanter Temperatur als auch im Temperaturzyklentest. Weiterhin werden die gestickten Kontakte betrachtet. Das verwendete Messverfahren und ein theoretisches Modell des Kontaktwiderstands werden vorgestellt. Um die Einflussgrößen des gestickten Kontakts zu reduzieren, wird ein vereinfachtes physikalisches Modell eingeführt. Beide Strukturen werden anschließend in Temperaturzyklentests mit In-situ-Messsystemen untersucht. Die Ergebnisse des Experiments zeigen, dass sich der Widerstand der Kontakte anfangs verbessert, dann aber mit der Zeit verschlechtert. Die Degradation [...]

Thermal Spreading and Contact Resistance

Author : Yuri S. Muzychka
Publisher : John Wiley & Sons
ISBN 13 : 1394187548
Total Pages : 469 pages
Book Rating : 4.3/5 (941 download)

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Book Synopsis Thermal Spreading and Contact Resistance by : Yuri S. Muzychka

Download or read book Thermal Spreading and Contact Resistance written by Yuri S. Muzychka and published by John Wiley & Sons. This book was released on 2023-08-09 with total page 469 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermal Spreading and Contact Resistance: Fundamentals and Applications Single source reference on how applying thermal spreading and contact resistance can solve problems across a variety of engineering fields Thermal Spreading and Contact Resistance: Fundamentals and Applications offers comprehensive coverage of the key information that engineers need to know to understand thermal spreading and contact resistance, including numerous predictive models for determining thermal spreading resistance and contact conductance of mechanical joints and interfaces, plus detailed examples throughout the book. Written by two of the leading experts in the field, Thermal Spreading and Contact Resistance: Fundamentals and Applications includes information on: Contact conductance, mass transfer, transport from super-hydrophobic surfaces, droplet/surface phase change problems, and tribology applications such as sliding surfaces and roller bearings Heat transfer in micro-devices and thermal spreaders, orthotropic systems, and multi-source applications for electronics thermal management applications Fundamental principles, thermal spreading in isotropic half-space regions, circular flux tubes and disc spreaders, and rectangular flux channels and compound spreaders Systems with non-uniform sink plane conductance, transient spreading resistance, and contact resistance between both non-conforming and conforming rough surfaces Providing comprehensive coverage of the subject, Thermal Spreading and Contact Resistance: Fundamentals and Applications is an essential resource for mechanical, aerospace, and chemical engineers working on research in the fields of heat transfer, thermal management of electronics, and tribology, as well as thermal engineers and researchers in the field of thermal physics.

Characterization and Modeling of Electrochemical Energy Conversion Systems by Impedance Techniques

Author : Dino Klotz
Publisher : KIT Scientific Publishing
ISBN 13 : 3866449038
Total Pages : 182 pages
Book Rating : 4.8/5 (664 download)

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Book Synopsis Characterization and Modeling of Electrochemical Energy Conversion Systems by Impedance Techniques by : Dino Klotz

Download or read book Characterization and Modeling of Electrochemical Energy Conversion Systems by Impedance Techniques written by Dino Klotz and published by KIT Scientific Publishing. This book was released on 2014-07-30 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis introduces (i) amendments to basic electrochemical measurement techniques in the time and frequency domain suitable for electrochemical energy conversion systems like fuel cells and batteries, which enable shorter measurement times and improved precision in both measurement and parameter identification, and (ii) a modeling approach that is able to simulate a technically relevant system just by information gained through static and impedance measurements of laboratory size cells.

Heat Transfer

Author : Adrian Bejan
Publisher : John Wiley & Sons
ISBN 13 : 1119467403
Total Pages : 612 pages
Book Rating : 4.1/5 (194 download)

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Book Synopsis Heat Transfer by : Adrian Bejan

Download or read book Heat Transfer written by Adrian Bejan and published by John Wiley & Sons. This book was released on 2022-04-05 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt: HEAT TRANSFER Provides authoritative coverage of the fundamentals of heat transfer, written by one of the most cited authors in all of Engineering Heat Transfer presents the fundamentals of the generation, use, conversion, and exchange of heat between physical systems. A pioneer in establishing heat transfer as a pillar of the modern thermal sciences, Professor Adrian Bejan presents the fundamental concepts and problem-solving methods of the discipline, predicts the evolution of heat transfer configurations, the principles of thermodynamics, and more. Building upon his classic 1993 book Heat Transfer, the author maintains his straightforward scientific approach to teaching essential developments such as Fourier conduction, fins, boundary layer theory, duct flow, scale analysis, and the structure of turbulence. In this new volume, Bejan explores topics and research developments that have emerged during the past decade, including the designing of convective flow and heat and mass transfer, the crucial relationship between configuration and performance, and new populations of configurations such as tapered ducts, plates with multi-scale features, and dendritic fins. Heat Transfer: Evolution, Design and Performance: Covers thermodynamics principles and establishes performance and evolution as fundamental concepts in thermal sciences Demonstrates how principles of physics predict a future with economies of scale, multi-scale design, vascularization, and hierarchical distribution of many small features Explores new work on conduction architecture, convection with nanofluids, boiling and condensation on designed surfaces, and resonance of natural circulation in enclosures Includes numerous examples, problems with solutions, and access to a companion website Heat Transfer: Evolution, Design and Performance is essential reading for undergraduate and graduate students in mechanical and chemical engineering, and for all engineers, physicists, biologists, and earth scientists.

Ohmic Contacts to Semiconductors

Author : Electrochemical Society
Publisher :
ISBN 13 :
Total Pages : 372 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Ohmic Contacts to Semiconductors by : Electrochemical Society

Download or read book Ohmic Contacts to Semiconductors written by Electrochemical Society and published by . This book was released on 1969 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Semiconductor Material and Device Characterization

Author : Dieter K. Schroder
Publisher : John Wiley & Sons
ISBN 13 : 0471739065
Total Pages : 800 pages
Book Rating : 4.4/5 (717 download)

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Book Synopsis Semiconductor Material and Device Characterization by : Dieter K. Schroder

Download or read book Semiconductor Material and Device Characterization written by Dieter K. Schroder and published by John Wiley & Sons. This book was released on 2015-06-29 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Third Edition updates a landmark text with the latest findings The Third Edition of the internationally lauded Semiconductor Material and Device Characterization brings the text fully up-to-date with the latest developments in the field and includes new pedagogical tools to assist readers. Not only does the Third Edition set forth all the latest measurement techniques, but it also examines new interpretations and new applications of existing techniques. Semiconductor Material and Device Characterization remains the sole text dedicated to characterization techniques for measuring semiconductor materials and devices. Coverage includes the full range of electrical and optical characterization methods, including the more specialized chemical and physical techniques. Readers familiar with the previous two editions will discover a thoroughly revised and updated Third Edition, including: Updated and revised figures and examples reflecting the most current data and information 260 new references offering access to the latest research and discussions in specialized topics New problems and review questions at the end of each chapter to test readers' understanding of the material In addition, readers will find fully updated and revised sections in each chapter. Plus, two new chapters have been added: Charge-Based and Probe Characterization introduces charge-based measurement and Kelvin probes. This chapter also examines probe-based measurements, including scanning capacitance, scanning Kelvin force, scanning spreading resistance, and ballistic electron emission microscopy. Reliability and Failure Analysis examines failure times and distribution functions, and discusses electromigration, hot carriers, gate oxide integrity, negative bias temperature instability, stress-induced leakage current, and electrostatic discharge. Written by an internationally recognized authority in the field, Semiconductor Material and Device Characterization remains essential reading for graduate students as well as for professionals working in the field of semiconductor devices and materials. An Instructor's Manual presenting detailed solutions to all the problems in the book is available from the Wiley editorial department.

Handbook for III-V High Electron Mobility Transistor Technologies

Author : D. Nirmal
Publisher : CRC Press
ISBN 13 : 0429862520
Total Pages : 434 pages
Book Rating : 4.4/5 (298 download)

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Book Synopsis Handbook for III-V High Electron Mobility Transistor Technologies by : D. Nirmal

Download or read book Handbook for III-V High Electron Mobility Transistor Technologies written by D. Nirmal and published by CRC Press. This book was released on 2019-05-14 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focusses on III-V high electron mobility transistors (HEMTs) including basic physics, material used, fabrications details, modeling, simulation, and other important aspects. It initiates by describing principle of operation, material systems and material technologies followed by description of the structure, I-V characteristics, modeling of DC and RF parameters of AlGaN/GaN HEMTs. The book also provides information about source/drain engineering, gate engineering and channel engineering techniques used to improve the DC-RF and breakdown performance of HEMTs. Finally, the book also highlights the importance of metal oxide semiconductor high electron mobility transistors (MOS-HEMT). Key Features Combines III-As/P/N HEMTs with reliability and current status in single volume Includes AC/DC modelling and (sub)millimeter wave devices with reliability analysis Covers all theoretical and experimental aspects of HEMTs Discusses AlGaN/GaN transistors Presents DC, RF and breakdown characteristics of HEMTs on various material systems using graphs and plots

Resistance Welding

Author : Hongyan Zhang
Publisher : CRC Press
ISBN 13 : 1466572728
Total Pages : 445 pages
Book Rating : 4.4/5 (665 download)

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Book Synopsis Resistance Welding by : Hongyan Zhang

Download or read book Resistance Welding written by Hongyan Zhang and published by CRC Press. This book was released on 2005-12-20 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-performance steels and aluminum alloys pose significant challenges to resistance welding processes. Unfortunately for students in materials science, metallurgy, and manufacturing, most available books provide only a superficial treatment of resistance spot welding. Surveying the topic in a scientific and systematic manner, Resistance Welding:

Electrical Insulation for Rotating Machines

Author : Greg C. Stone
Publisher : John Wiley & Sons
ISBN 13 : 1118892291
Total Pages : 685 pages
Book Rating : 4.1/5 (188 download)

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Book Synopsis Electrical Insulation for Rotating Machines by : Greg C. Stone

Download or read book Electrical Insulation for Rotating Machines written by Greg C. Stone and published by John Wiley & Sons. This book was released on 2014-07-02 with total page 685 pages. Available in PDF, EPUB and Kindle. Book excerpt: A fully expanded new edition documenting the significant improvements that have been made to the tests and monitors of electrical insulation systems Electrical Insulation for Rotating Machines: Design, Evaluation, Aging, Testing, and Repair, Second Edition covers all aspects in the design, deterioration, testing, and repair of the electrical insulation used in motors and generators of all ratings greater than fractional horsepower size. It discusses both rotor and stator windings; gives a historical overview of machine insulation design; and describes the materials and manufacturing methods of the rotor and stator winding insulation systems in current use (while covering systems made over fifty years ago). It covers how to select the insulation systems for use in new machines, and explains over thirty different rotor and stator winding failure processes, including the methods to repair, or least slow down, each process. Finally, it reviews the theoretical basis, practical application, and interpretation of forty different tests and monitors that are used to assess winding insulation condition, thereby helping machine users avoid unnecessary machine failures and reduce maintenance costs. Electrical Insulation for Rotating Machines: Documents the large array of machine electrical failure mechanisms, repair methods, and test techniques that are currently available Educates owners of machines as well as repair shops on the different failure processes and shows them how to fix or otherwise ameliorate them Offers chapters on testing, monitoring, and maintenance strategies that assist in educating machine users and repair shops on the tests needed for specific situations and how to minimize motor and generator maintenance costs Captures the state of both the present and past “art” in rotating machine insulation system design and manufacture, which helps designers learn from the knowledge acquired by previous generations An ideal read for researchers, developers, and manufacturers of electrical insulating materials for machines, Electrical Insulation for Rotating Machines will also benefit designers of motors and generators who must select and apply electrical insulation in machines.

Electric Contacts

Author : Ragnar Holm
Publisher : Springer Science & Business Media
ISBN 13 : 3662066882
Total Pages : 503 pages
Book Rating : 4.6/5 (62 download)

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Book Synopsis Electric Contacts by : Ragnar Holm

Download or read book Electric Contacts written by Ragnar Holm and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 503 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a completely revised and rewritten edition of "Electric Contacts Handbook" published in 1958. A large number of new in vestigations are considered, and many of the basic theories are revised in detail and even in general. The body of information had to be limited as it was not advisable to increase the volume of the book. In particular, no attempt was made to cover all of the practical applications. They appear as examples following concentrated explanations of basic phenomena. As in several branches of technology, the solutions of problems ari sing in the field of electric contacts involve insight into various disci plines of physics. It is feit that reviews of some of those topics, especi ally adapted to electric contact phenomena, are welcome to many readers. For example, chapters have been devoted to the structure of carbon, the band theory of electric conduction in solids, certain pro blems in statistics, and the theory of the electric arc. As regards arc problems, new ideas have been introduced. In order to make the main text less cumbersome, such reviews are presented as appendices. Throughout this edition, the mksa-unit system is used in accord with the latest recommendation for standardization of units in scientific and technical writings. The chapter "History of Early Investigations on Contacts" forming Part IV in the preceding edition of 1958 has not been repeated in this book.

Electrical Contacts

Author : Paul G. Slade
Publisher : CRC Press
ISBN 13 : 9780824719340
Total Pages : 1116 pages
Book Rating : 4.7/5 (193 download)

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Book Synopsis Electrical Contacts by : Paul G. Slade

Download or read book Electrical Contacts written by Paul G. Slade and published by CRC Press. This book was released on 1999-03-31 with total page 1116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering the choice, attachment, and testing of contact materials, Electrical Contacts introduces a thorough discussion on making electric contact and contact interface conduction, presents a general outline of, and measurement techniques for, important corrosion mechanisms, discusses the results of contact wear when plug-in connections are made and broken, investigates the effect of thin noble metal plating on electronic connections, relates crucial considerations for making high- and low-power contact joints, details arcing effects on contacts including contact erosion, welding, and contamination, and contains nearly 2800 references, tables, equations, drawings, and photographs.

Resistivity and Induced Polarization

Author : Andrew Binley
Publisher : Cambridge University Press
ISBN 13 : 1108492746
Total Pages : 409 pages
Book Rating : 4.1/5 (84 download)

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Book Synopsis Resistivity and Induced Polarization by : Andrew Binley

Download or read book Resistivity and Induced Polarization written by Andrew Binley and published by Cambridge University Press. This book was released on 2020-12-17 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive text on resistivity and induced polarization covering theory and practice for the near-surface Earth supported by modelling software.

The Measurement and Correction of Electrolyte Resistance in Electrochemical Tests

Author : Louis L. Scribner
Publisher : ASTM International
ISBN 13 : 0803112831
Total Pages : 225 pages
Book Rating : 4.8/5 (31 download)

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Book Synopsis The Measurement and Correction of Electrolyte Resistance in Electrochemical Tests by : Louis L. Scribner

Download or read book The Measurement and Correction of Electrolyte Resistance in Electrochemical Tests written by Louis L. Scribner and published by ASTM International. This book was released on 1990 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Green and Intelligent Technologies for Sustainable and Smart Asphalt Pavements

Author : Xueyan Liu
Publisher : CRC Press
ISBN 13 : 1000533360
Total Pages : 1727 pages
Book Rating : 4.0/5 (5 download)

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Book Synopsis Green and Intelligent Technologies for Sustainable and Smart Asphalt Pavements by : Xueyan Liu

Download or read book Green and Intelligent Technologies for Sustainable and Smart Asphalt Pavements written by Xueyan Liu and published by CRC Press. This book was released on 2021-11-25 with total page 1727 pages. Available in PDF, EPUB and Kindle. Book excerpt: Green and Intelligent Technologies for Sustainable and Smart Asphalt Pavements contains 124 papers from 14 different countries which were presented at the 5th International Symposium on Frontiers of Road and Airport Engineering (IFRAE 2021, Delft, the Netherlands, 12-14 July 2021). The contributions focus on research in the areas of "Circular, Sustainable and Smart Airport and Highway Pavement" and collects the state-of-the-art and state-of-practice areas of long-life and circular materials for sustainable, cost-effective smart airport and highway pavement design and construction. The main areas covered by the book include: • Green and sustainable pavement materials • Recycling technology • Warm & cold mix asphalt materials • Functional pavement design • Self-healing pavement materials • Eco-efficiency pavement materials • Pavement preservation, maintenance and rehabilitation • Smart pavement materials and structures • Safety technology for smart roads • Pavement monitoring and big data analysis • Role of transportation engineering in future pavements Green and Intelligent Technologies for Sustainable and Smart Asphalt Pavements aims at researchers, practitioners, and administrators interested in new materials and innovative technologies for achieving sustainable and renewable pavement materials and design methods, and for those involved or working in the broader field of pavement engineering.

Thermal Properties Measurement of Materials

Author : Yves Jannot
Publisher : John Wiley & Sons
ISBN 13 : 1119505984
Total Pages : 348 pages
Book Rating : 4.1/5 (195 download)

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Book Synopsis Thermal Properties Measurement of Materials by : Yves Jannot

Download or read book Thermal Properties Measurement of Materials written by Yves Jannot and published by John Wiley & Sons. This book was released on 2018-01-19 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the main methods used for thermal properties measurement. It aims to be accessible to all those, specialists in heat transfer or not, who need to measure the thermal properties of a material. The objective is to allow them to choose the measurement method the best adapted to the material to be characterized, and to pass on them all the theoretical and practical information allowing implementation with the maximum of precision.

Citizens Radio Call Book Magazine

Author :
Publisher :
ISBN 13 :
Total Pages : 810 pages
Book Rating : 4.:/5 (334 download)

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Book Synopsis Citizens Radio Call Book Magazine by :

Download or read book Citizens Radio Call Book Magazine written by and published by . This book was released on 1926 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Should we aim for genetic improvement in host resistance or tolerance to infectious disease?

Author : Andrea B. Doeschl-Wilson
Publisher : Frontiers E-books
ISBN 13 : 2889191052
Total Pages : 100 pages
Book Rating : 4.8/5 (891 download)

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Book Synopsis Should we aim for genetic improvement in host resistance or tolerance to infectious disease? by : Andrea B. Doeschl-Wilson

Download or read book Should we aim for genetic improvement in host resistance or tolerance to infectious disease? written by Andrea B. Doeschl-Wilson and published by Frontiers E-books. This book was released on with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent advances in quantitative genetic and genomic studies have shed light on the important role of genetic control strategies for reducing disease risk and severity in livestock populations. There are two alternative host defence strategies to infectious pathogens that could be enhanced by genetic selection: improvement of host resistance versus improvement of host tolerance to infectious pathogens. Resistance refers to mechanisms that restrict the reproduction rate of a pathogen within a host, whilst tolerance mechanisms focus on minimising the damage that a pathogen inflicts on the host. Both strategies may have a similar impact on individual host fitness and performance, but can have contrasting effects on population performance and disease risk and severity. For example, improving host resistance may result in successful eradication of a disease from a livestock population, whereas disease eradication may be difficult if hosts are tolerant as these can harbour the pathogen without showing obvious or severe symptoms. On the other hand, it has been argued that increasing host resistance would fuel the arms race between host and pathogen and stimulate pathogen evolution towards higher virulence. Increasing tolerance, in contrast, imposes no or little selection pressure on the pathogen. Further, whereas disease resistance mechanisms may be specific to a particular pathogen (e.g. development of specific antibodies), tolerance mechanisms that repair damaged tissues are associated with the host rather than the pathogen, and are thus more likely to be generic to a range of pathogens. Hence, improving tolerance may be beneficial if individuals are exposed to a variety of pathogens or pathogen strains, and disease eradication has proven difficult. In contrast to evolutionary biology and plant breeding, animal breeding has only recently started to seriously consider a distinction between disease resistance and tolerance and their consequences. However, a deeper understanding of the underlying mechanisms and implications of improving either or both of the host defence mechanisms on future disease risk and severity is urgently needed by animal scientists, veterinarians and breeders to make informed decisions that help to maintain healthy livestock populations and guarantee food security. The topic ‘genetic improvement of disease resistance v tolerance’ would lend itself to research papers covering a variety of aspects that need to be considered, such as ‘how to obtain genetic parameter estimates and genomic breeding values related to disease resistance / tolerance’, ‘evidence for host genetic influence of resistance or tolerance’, ‘genetic, genomic and immunological understanding of resistance / tolerance mechanisms’, ‘epidemiological consequences of improving disease resistance / tolerance’. I believe that this research topic is both timely and relevant, and that sufficient knowledge is available across disciplines for composing valuable research / review articles that stimulate interest to a wide range of readers of Frontiers, and thus promote the growth of this journal.