An Introduction To Peaf

This reference provides a practical introduction to PEAF (pragmatic enterprise architecture framework) and its use in enterprise-architecture practice for those who want to explore how to get an enterprise on track with EA.

At last – a second edition of this classic web development work. PHP Objects, Patterns, and Practice shows you how to meld the power of PHP with the sound enterprise development techniques embraced by professional programmers. Going well beyond the basics of object-oriented development, you'll learn about advanced topics such as working with static methods and properties, abstract classes, interfaces, design patterns, exception handling, and more. You'll also be exposed to key tools such as PEAR, CVS, Phing, and phpDocumentor. PHP is the most popular web development language in the world. With corporate adoption on the rise, this fully updated and enhanced edition is an essential text for webmasters.

Leaves are among the most abundant organs on earth and are a defining feature of most terrestrial ecosystems. However, a leaf is also a potential meal for a hungry animal and the question therefore arises, why does so much foliage survive in nature? What mechanisms protect leaves so that, on a global scale, only a relatively small proportion of living leaf material is consumed? Leaf survival is in large part due to two processes: firstly, leaf-eating organisms fall prey to predators (top-down pressure on the herbivore); secondly, leaves defend themselves (bottom-up pressure on the herbivore). Remarkably, these two types of event are often linked; they are controlled and coordinated by plants and the molecular mechanisms that underlie this are now beginning to emerge. This novel text focuses exclusively on the leaf, on the herbivorous organisms that attack leaves, and the mechanisms that plants use to defend these vital organs. It begins with an assessment of the scale of herbivory, before examining direct physical and chemical defences on leaf surfaces and within the leaf itself. Although some leaf defences are easily seen, most operate at the molecular level and are therefore invisible to the naked eye. Many of these recently elucidated mechanisms are described. Throughout the book, perspectives from both the laboratory and the field are combined. A central feature of the work is its emphasis on the coevolution of leaf defences and the digestive tracts of animals including humans, making the book of relevance in understanding the role of leaf defences in agriculture. Leaf Defence is suitable for senior undergraduate and graduate students taking courses in plant science, as well as a broader audience of biologists and biochemists seeking a comprehensive and authoritative overview of this exciting and emerging topic.

This volume provides different perspectives regarding the impact of COVID-19 on students collectively and college teaching and learning. Topics include COVID-19 implications on student wellness and stress management, online learning, graduate teach assistants, emerging, technology, faculty-student relationships, student learning, and more.

Written and edited by world-renowned experts in the field, including Dr. Shoei K. Stephen Huang, a pioneer of radiofrequency catheter ablation procedures, Huang's Catheter Ablation of Cardiac Arrhythmias, 5th Edition, provides authoritative, comprehensive information on these increasingly used electrophysiology procedures. This outstanding resource is packed with cutting-edge content in every area of this fast-changing field, including anatomy, diagnostic criteria, differential diagnosis, mapping, and ablation. Ideal for practitioners who need a definitive, user-friendly ablation text for the electrophysiology lab or office setting, it offers quick access to practical content, using detailed tables and high-quality images to help you apply what you learn in your practice. Reflects all the latest technology, including the new pulse field ablation (PFA) procedure, new balloon technologies (RF, laser, and PFA) for pulmonary vein isolation, and high-resolution 3D mapping systems. Offers expert guidance on atrial tachycardia and flutter, atrial fibrillation, atrioventricular nodal reentrant tachycardia, tachycardias related to accessory atrioventricular connections, ventricular tachycardia, transseptal catheterization techniques, ablation for pediatric patients, and patient safety and complications. Contains new chapters covering Biophysics and Clinical Applications of Laser Ablation, Biophysics and Clinical Applications of Pulse Field Ablation, Multiple Strategic Approach to Ablate Atrial Fibrillation, Ablation of Challenging/Difficult Accessory Pathways, Ablation of Ventricular Tachycardia in Arrhythmogenic Ventricular Cardiomyopathy, and more. Contains 450 figures, including ECGs, intracardiac recordings, 3D mapping, ultrasound, fluoroscope, and ablation images. Includes numerous tables and boxes that provide quick access to key points, arrhythmia mechanisms, diagnostic criteria, target sites for ablation, use of special equipment, complications, and troubleshooting problems and their solutions. Provides access to 20 video clips, including transseptal access to the left atrium, intracardiac ultrasound, and techniques of pericardial access. Any additional digital ancillary content may publish up to 6 weeks following the publication date.