REACT

REACT or React may refer to:

React (Erick Sermon album)

React is Erick Sermon's fifth album. It received mediocre critical and commercial success despite featuring the single "React" which was a Rhythmic Top 40 and Billboard Hot 100 hit. John Bush of Allmusic describes it as being a "hardcore follow-up to his 2001 crossover hit Music" as well as commenting on its "dark tone" and "raw raps".

Track listing

Samples

Love Iz

Hold Up Dub

React

React (book)

React (from Spanish: Reacciona) is a book by Rosa María Artal published in Spain in 2011 by Aguilar, which compiles articles by José Luis Sampedro, Baltasar Garzón, Federico Mayor Zaragoza, Javier Pérez de Albéniz, Javier López Facal, Carlos Martínez Alonso, Ignacio Escolar, Rosa María Artal, Angels Martínez Castells, Juan Torres Lopez and Lourdes Lucia. The book, edited by journalist Rosa María Artal, is intended to comment on the political crisis that exists in today's society -particularly in Spain- and the need for a social response to the corruption which has led to the 2011 financial, economic and political crisis. It emphasizes the fact that the concentrations of political powers are becoming increasingly distant from the citizenship.

Background: Time for Outrage!, Hessel's book

The book was prefaced by Stéphane Hessel, author of the book Time for Outrage! originally published in France 2010 and translated into Spanish in 2011.

Purpose and content of the book

The book was written with the intention of raising awareness to the dangers that societies currently face and calls for action, participation and discourages resignation.

Fabrication and testing of optical components

Optical fabrication and testing spans an enormous range of manufacturing procedures and optical test configurations.

The manufacture of a conventional spherical lens typically begins with the generation of the optic's rough shape by grinding a glass blank. This can be done, for example, with ring tools. Next, the lens surface is polished to its final form. Typically this is done by lapping—rotating and rubbing the rough lens surface against a tool with the desired surface shape, with a mixture of abrasives and fluid in between. Typically a carved pitch tool is used to polish the surface of a lens. The mixture of abrasive is called slurry and it is typically made from cerium or zirconium oxide in water with lubricants added to facilitate pitch tool movement without sticking to the lens. The particle size in the slurry is adjusted to get the desired shape and finish.

During polishing, the lens may be tested to confirm that the desired shape is being produced, and to ensure that the final shape has the correct form to within the allowed precision. The deviation of an optical surface from the correct shape is typically expressed in fractions of a wavelength, for some convenient wavelength of light (perhaps the wavelength at which the lens is to be used, or a visible wavelength for which a source is available). Inexpensive lenses may have deviations of form as large as several wavelengths (λ, 2λ, etc.). More typical industrial lenses would have deviations no larger than a quarter wavelength (λ/4). Precision lenses for use in applications such as lasers, interferometers, and holography have surfaces with a tenth of a wavelength (λ/10) tolerance or better. In addition to surface profile, a lens must meet requirements for surface quality (scratches, pits, specks, etc.) and accuracy of dimensions.

Fabrication (science)

In scientific inquiry and academic research, fabrication is the intentional misrepresentation of research results by making up data, such as that reported in a journal article. As with other forms of scientific misconduct, it is the intent to deceive that marks fabrication as highly unethical and different from scientists deceiving themselves. In some jurisdictions, fabrication may be illegal.

Examples of activities that constitute fabrication include:

Some forms of unintentional academic incompetence or malpractice can be difficult to distinguish from intentional fabrication. Examples of this include the failure to account for measurement error, or the failure to adequately control experiments for any parameters being measured.

Fabrication can also occur in the context of undergraduate or graduate studies wherein a student fabricates a laboratory or homework assignment. Such cheating, when discovered, is usually handled within the institution, and does not become a scandal within the larger academic community (as cheating by students seldom has any academic significance).

Semiconductor device fabrication

Semiconductor device fabrication is the process used to create the integrated circuits that are present in everyday electrical and electronic devices. It is a multiple-step sequence of photo lithographic and chemical processing steps during which electronic circuits are gradually created on a wafer made of pure semiconducting material. Silicon is almost always used, but various compound semiconductors are used for specialized applications.

The entire manufacturing process, from start to packaged chips ready for shipment, takes six to eight weeks and is performed in highly specialized facilities referred to as fabs.

History

When feature widths were far greater than about 10 micrometres, purity was not the issue that it is today in device manufacturing. As devices became more integrated, cleanrooms became even cleaner. Today, the fabs are pressurized with filtered air to remove even the smallest particles, which could come to rest on the wafers and contribute to defects. The workers in a semiconductor fabrication facility are required to wear cleanroom suits to protect the devices from human contamination.