Is it obvious that a network of neurons can explain how we see? There is an apocryphal story about the mathematician Hardy, who wrote an equation on the blackboard and said "The proof of this is obvious." After a little while he murmured "At least I think it is," and left to check the proof in the library, only returning just before the end of the lecture to announce "Yes, it is obvious." Sometimes, mathematical techniques are necessary to be sure that a network with a given set of properties will generate a particular visual phenomenon. The geometrical concepts of vectors and manifolds are introduced in the context of the visual system and used to provide a framework for explaining the behaviour of the visual system.
Latin women, you may love them but may not marry them." Latin Fiancé Visa, written by Richard Clément, is a romantic novel yet full of drama and humor, which portrays the story of two individuals, Marc and Sandra. The story features the two characters engaging in an online chatting portal, meeting soon after, and falling in love and sharing sexual passion at first sight. The story continues as they develop their relationship and try to settle in together. Marc organizes their life between Colombia and the USA. Sandra begins to display a manipulative behavior of permissive sensuality and uncontrolled anger and jealousy. Everything starts to change for the best as Sandra arrives in America and finally gets married. Back in Colombia for a trip, married Sandra shows a different characteristic of erratic and dishonest behavior. Marc files for divorce, but Sandra comes back with a vengeance taking full advantage of the US legal system.
This book is a volume in the Penn Press Anniversary Collection. To mark its 125th anniversary in 2015, the University of Pennsylvania Press rereleased more than 1,100 titles from Penn Press's distinguished backlist from 1899-1999 that had fallen out of print. Spanning an entire century, the Anniversary Collection offers peer-reviewed scholarship in a wide range of subject areas.
Different animals have different visual systems and so presumably have different ways of seeing. How does the way in which we see depend on the optical, neural and motor components of our visual systems? Originally published in 1993, the mathematical tools needed to answer this question are introduced in this book. Elementary linear algebra is used to describe the transformations of the stimulus that occur in the formation of the optical, neural and motor images in the human visual system. The distinctive feature of the approach is that transformations are specified with enough rigour for readers to be able to set up their own models and generate predictions from them. Underlying the approach of this book is the goal of providing a self-contained source for the derivation of the basic equations of vision science. An introductory section on vector and matrix algebra covers the mathematical techniques which are applied to both sensory and motor aspects of the visual system, and the intervening steps in the mathematical arguments are given in full, in order to make the derivation of the equations easier to follow. A subsidiary goal of this book is to demonstrate the utility of current desktop computer packages which make the application of mathematics very easy. All the numerical results were produced using only a spreadsheet or mathematics package, and example calculations are included in the text.
I've been waiting for a novel with vicars, rude old ladies, murder and sausage dogs... et voila!" Dawn French This first in a new series is a charming, warm and witty tale of secrets and murder set among the parishioners of a quaint English village. The No.1 Sunday Times bestselling crime novel, perfect for fans of Richard Osman’s The Thursday Murder Club series. 'Whodunnit fans can give praise and rejoice' IAN RANKIN Canon Daniel Clement is Rector of Champton. He has been there for eight years, living at the Rectory alongside his widowed mother–opinionated, fearless, ever-so-slightly annoying Audrey–and his two dachshunds, Cosmo and Hilda. When Daniel announces a plan to install a lavatory in church, the parish is suddenly (and unexpectedly) divided: as lines are drawn, long-buried secrets come dangerously close to destroying the apparent calm of the village. And then Anthony Bowness–cousin to Bernard de Floures, patron of Champton–is found dead at the back of the church, stabbed in the neck with a pair of pruning shears. As the police moves in and the bodies start piling up, Daniel is the only one who can try and keep his fractured community together... and catch a killer. A delightful, cosy murder mystery with a sharp edge from the bestselling author.
In this influential and controversial book that has become a classic in popular science writing, Dawkins furthers his fascinating look at the evolution of life and natural selection.
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