Article: In the early 11th century, the Muslim physicist Ibn al-Haytham (Alhacen or Alhazen) discussed space perception and its epistemological implications in his Book of Optics (1021), he also rejected Aristotle's definition of topos (Physics IV) by way of geometric demonstrations and defined place as a mathematical spatial extension. His experimental proof of the intromission model of vision led to changes in the understanding of the visual perception of space, contrary to the previous emission theory of vision supported by Euclid and Ptolemy. In "tying the visual perception of space to prior bodily experience, Alhacen unequivocally rejected the intuitiveness of spatial perception and, therefore, the autonomy of vision. Without tangible notions of distance and size for correlation, sight can tell us next to nothing about such things."

Question: Alhazen's experimental proof of the intromission model of vision led to the change of understanding of what?
Ans: Without tangible notions of distance and size for correlation, sight can tell us next to nothing about such things

Article: The Directorate of Analysis produces all-source intelligence investigation on key foreign and intercontinental issues relating to powerful and sometimes anti-government sensitive topics. It has four regional analytic groups, six groups for transnational issues, and three focus on policy, collection, and staff support. There is an office dedicated to Iraq, and regional analytical Offices covering the Near Eastern and South Asian Analysis, the Office of Russian and European Analysis, and the Office of Asian Pacific, Asian Pacific, Latin American, and African Analysis and African Analysis.

Question: How many groups does the Directorate of Analysis have for transnational issues?
Ans: six

Article: Apple's HyperCard scripting language provided Macintosh computer users with a means to design databases of slides, animation, video and sounds from LaserDiscs and then to create interfaces for users to play specific content from the disc through software called LaserStacks. User-created "stacks" were shared and were especially popular in education where teacher-generated stacks were used to access discs ranging from art collections to basic biological processes. Commercially available stacks were also popular with the Voyager company being possibly the most successful distributor.

Question: What did LaserStacks software enable Mac users to do?
Ans: play specific content from the disc

Article: Windows 8 surpassed Windows Vista in market share with a 5.1% usage rate according to numbers posted in July 2013 by Net Applications, with usage on a steady upward trajectory. However, intake of Windows 8 still lags behind that of Windows Vista and Windows 7 at the same point in their release cycles. Windows 8's tablet market share has also been growing steadily, with 7.4% of tablets running Windows in Q1 2013 according to Strategy Analytics, up from nothing just a year before. However, this is still well below Android and iOS, which posted 43.4% and 48.2% market share respectively, although both operating systems have been on the market much longer than Windows 8. Strategy Analytics also noted "a shortage of top tier apps" for Windows tablets despite Microsoft strategy of paying developers to create apps for the operating system (in addition to for Windows Phone).

Question: What was teh iOS market share in 2013?
Ans:
48.2%