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XPS is a surface-sensitive technique that measures the elements and chemical states of any material by irradiating it with X-rays. Learn about the basic components, data processing, and applications of XPS, as well as the difference between monochromatic and non-monochromatic sources.
Descartes is a Canadian technology company that provides logistics software, supply chain management software, and cloud services. It operates the Global Logistics Network, an electronic messaging system for logistics and customs information, and has acquired several niche companies in the sector.
Learn about the analytical technique that uses X-rays to determine the elemental composition of a sample. Find out how it works, what equipment is needed, what hazards and safety measures are involved, and what variants and applications exist.
AOL Mail offers secure and personalized email with features like AOL Mail, news, and weather for free. You can also access your email on the go with an iOS & Android app and get help from experts.
Learn how to count the roots of a polynomial by examining sign changes in its coefficients, as described by René Descartes in his La Géométrie. See examples, proofs, generalizations and related topics.
The folium of Descartes is an algebraic curve named after René Descartes, who challenged Pierre de Fermat to find its tangent line. Learn about its history, properties, graphing methods, and relation to the trisectrix of Maclaurin.
Learn about René Descartes' famous treatise on his method of doubt and his famous statement "I think, therefore I am". The web page also covers the book's organization, content, and influence in modern philosophy and science.
A philosophical treatise by René Descartes on the nature and function of the passions, or emotions, as natural phenomena. Descartes explores the relationship between the body and the soul, the six basic passions, and the role of reason in controlling them.