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This book looks at how three kinds of strongly electric fishes
literally became "electrical," and how they helped to change the
sciences and medicine. These fishes are the flat torpedo rays
common to the Mediterranean, the electric catfishes of Africa, and
an "eel" from South America. The discovery of the electrical nature
of these fishes in the second half of the 18th century was the
starting point of the two fundamental advances in the sciences: on
the physiological side, the demonstration that nerve conduction and
muscle excitation are electrical phenomena, and on the physical
side, the invention of the electric battery. Starting with catfish
tomb drawings from Ancient Egypt and colorful descriptions of
torpedoes from the Classical Era, the authors show how these fishes
were both fascinating and mysterious to the ancients. After all,
not only could they produce torpor and temporary numbness when
touched, they could stun through intermediaries, such as wet nets
and spears.
..". and still we could never suppose that fortune were to be so
friendly to us, such as to allow us to be perhaps the first in
handling, as it were, the electricity concealed in nerves, in
extracting it from nerves, and, in some way, in putting it under
everyone's eyes."
Galileo is known as a pioneer of science - especially of mechanics and astronomy, but far less attention has been paid to his work on the senses, and on vision in particular. In this book, two experts on the history of science look at the novel ways in which Galileo looked at the heavens through his telescope, and, in the process, emphasised the importance of contrast phenomena and visual resolution within astronomical observations. He also described the senses and their perception in terms that found an echo in doctrines advanced by nineteenth century sensory physiologists. In a fascinating and accessible style, Marco Piccolino and Nick Wade analyse the scientific and philosophical work of Galileo Galilei from the particular viewpoint of his approach to the senses (and especially vision) as a means of acquiring trustworthy knowledge about the constitution of the world. For Galileo the senses were potentially ambiguous, hence reliable information capable of penetrating the complexity of reality could only be obtained by interpreting the sensory data critically. The philosophical background of Galileo's attitude to the senses was his awareness that nature had not developed a specific language aimed at communicating with senses generally and human senses in particular. The culture of his age was based mainly on mechanistic approaches to the world. In this context, Galileo's analysis of the senses corresponded closely to a fundamental tenet of modern sensory physiology and psychophysics - the absence in the world of specific sensory signals like sounds, colours, tastes, and odours. Fully illustrated throughout, this book is an important contribution to psychology and the vision sciences, but more broadly to our knowledge of a pioneering figure in the history of science.
Learn the complete Qt ecosystem and its tools and build UIs for mobile and desktop applications Key Features Unleash the power of the latest Qt 5.9 with C++14 Easily compile, run, and debug your applications from the powerful Qt Creator IDE Build multi-platform projects that target Android, iOS, Windows, MacOS, Linux, and more Book DescriptionQt 5.9 is an application development framework that provides a great user experience and develops full-capability applications with Qt Widgets, QML, and even Qt 3D. This learning path demonstrates the power and flexibility of the Qt framework for desktop application development and shows how you can write an application once and deploy it to multiple operating systems. It will address all the challenges while developing cross-platform applications with the Qt framework. This course will give you a better understanding of the Qt framework and tools to resolve serious issues such as linking, debugging, and multithreading. It will also upskill you by explaining how to create a to-do-style app and taking you through all the stages in building a successful project. You will build a suite of apps; while developing these apps, you'll deepen your knowledge of Qt Quick's layout systems, and see Qt 3D and widgets in action. The next project will be in the industrial and agricultural sectors: making sense of sensor data via a monitoring system. Your apps should run seamlessly across devices and operating systems such as Android, iOS, Windows, or Mac, and be cost-effective by integrating with existing web technologies. You take the role of lead developer and prototype a monitoring system. In doing so, you'll get to know Qt's Bluetooth and HTTP APIs, as well as the Charts and Web Engine UI modules. These projects will help you gain a holistic view of the Qt framework. What you will learn Install and configure the Qt Framework and Qt Creator IDE Implement a rich user interface with QML Learn the fundamentals of QtTest and how to integrate unit testing Create stunning UIs with Qt Widget and Qt Quick Develop powerful, cross-platform applications with the Qt framework Design GUIs with Qt Designer and build a library in it for UI previews Build a desktop UI with widgets and Designer Get familiar with multimedia components to handle visual input and output Who this book is forThis book will appeal to developers and programmers who would like to build GUI-based applications. Knowledge of C++ is necessary and a basic familiarity with Qt would be helpful.
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