This book provides a comprehensive overview of the historical development of color science, told through the stories of more than 90 of the most prominent figures in the field and their contributions. The text comprises an extensive set of biographical essays about pioneering scientists in the field of color science, describing their most significant achievements and explaining how their findings influenced the general understanding of color. Grouped by historical period, each part is prefaced with a short introduction that sets the essays into context and helps the reader appreciate the background and the importance of the contributions made. Beginning with classical Greece and the works of Plato and Aristotle, the book goes on in the second part to describe the advances made by Islamic scholars such as Ibn al-Haytham between the 10th and 15th centuries. The third part covers contributions from Roger Bacon and Theodoric of Freiberg in the same period. Part four includes discussions on color formation and visual perception for a time period from about the 16th to the 18th centuries encompassing the Age of Enlightenment. This part addresses the works of nineteen pioneers including Descartes, Boyle, Newton, Goethe, Lambert, Purkynje, Runge, Dalton, Young and Chevreul. The final part is the largest section of the book and covers the most recent discoveries and contributions from pioneers born after 1800 and includes over 60 essays. Among the pioneers listed in this chapter are Nobel laureates, vision scientists including Helmholtz, and Hering, and many other notable color pioneers such as Munsell and Land. This part of the book also includes essays on contemporary figures in color science including Adams, Boynton, Crawford, Hardy, MacAdam, Ostwald and Wyszecki and reviews their contributions to this dynamic field. A useful reference for color scientists, science historians, artists and others, Pioneers of Color Science offers a fascinating insight into the development of color science and the nature of scientific advancement.

Joe Biden trabajó brevemente como abogado antes de dedicarse a la política. Se convirtió en el quinto senador más joven de la historia y el senador más veterano de Delaware. Su campaña presidencial de 2008 nunca cobró impulso, pero el candidato demócrata Barack Obama lo eligió como su compañero de fórmula, y Biden pasó a cumplir dos períodos como el 47° vicepresidente de los Estados Unidos. En 2017, al cierre de su administración, Obama le entregó a Biden la Medalla Presidencial de la Libertad. Dos años más tarde Biden lanzó su campaña para la presidencia de EE.UU. y fue elegido como el 46° presidente de los Estados Unidos. "La verdadera valentía es cuando hay muy pocas posibilidades de ganar, pero sigues luchando". - Joe Biden Esta es la biografía descriptiva y concisa de Joe Biden.

Available for the first time in paperback, this volume contains text with translation of De Motu Animalium, Aristotle's attempt to lay the groundwork for a general theory of the explanation of animal activity, along with commentary and interpretive essays on the work.

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Is suicide wrong, profoundly morally wrong? Almost always wrong, but excusable in a few cases? Sometimes morally permissible? Imprudent, but not wrong? Is it sick, a matter of mental illness? Is it a private matter or a largely social one? Could it sometimes be right, or a "noble duty," or even a fundamental human right? Whether it is called "suicide" or not, what role may a person play in the end of his or her own life? This collection of primary sources--the principal texts of ethical interest from major writers in western and nonwestern cultures, from the principal religious traditions, and from oral cultures where observer reports of traditional practices are available, spanning Europe, Asia, the Middle East, Africa, Oceania, the Arctic, and North and South America--facilitates exploration of many controversial practical issues: physician-assisted suicide or aid-in-dying; suicide in social or political protest; self-sacrifice and martyrdom; suicides of honor or loyalty; religious and ritual practices that lead to death, including sati or widow-burning, hara-kiri, and sallekhana, or fasting unto death; and suicide bombings, kamikaze missions, jihad, and other tactical and military suicides. This collection has no interest in taking sides in controversies about the ethics of suicide; rather, rather, it serves to expand the character of these debates, by showing them to be multi-dimensional, a complex and vital part of human ethical thought.

The Metaphysics presents Aristotle's mature rejection of both the Platonic theory that what we perceive is just a pale reflection of reality and the hardheaded view that all processes are ultimately material. He argued instead that the reality or substance of things lies in their concrete forms, and in so doing he probed some of the deepest questions of philosophy: What is existence? How is change possible? And are there certain things that must exist for anything else to exist at all? The seminal notions discussed in The Metaphysics - of 'substance' and associated concepts of matter and form, essence and accident, potentiality and actuality - have had a profound and enduring influence, and laid the foundations for one of the central branches of Western philosophy.