Question: Whats an area that extends in every direction?
About the article "Chernobyl disaster", section "The Exclusion Zone".

Candidate passages:
Mega-Whats is the National Open Quizzing Championship, begun in 2009.
The contest is held simultaneously in several Indian cities on the second Sunday in December every year.
Winners from these cities then meet each other for the Mega-Whats Face-off the following June during the KQA Anniversary. 
The Mix Network has brought the public the ability to see where their friends are going, and 'whats on' in every club, bar and restaurant in two of the UK's major cities.
The website is designed so that when a visitor performs an activity such as adding an event to their profile calendar, purchasing a ticket for an event, reserving a table, editing their favourites, adding photos, or making new friends all of their friends are notified of this in their own personal profiles.
You can also view each friends profile individually in order to see photos, send messages, view their personal calendar and 'friends activity' which details what their friends are planning.
This means that The Mix Network users can always see what their friends are doing,'whats on' in the external social environment, and have the facilities to perform multiple actions such as purchase tickets or make a table reservation directly on The Mix Network. 
The scalar approach defines flux density as a scalar-valued function of a direction and sense in space prescribed by the investigator at a point prescribed by the investigator.
Sometimes this approach is indicated by the use of the term 'hemispheric flux'.
For example, an investigator of thermal radiation, emitted from the material substance of the atmosphere, received at the surface of the earth, is interested in the vertical direction, and the downward sense in that direction.
This investigator thinks of a unit area in a horizontal plane, surrounding the prescribed point.
The investigator wants to know the total power of all the radiation from the atmosphere above in every direction, propagating with a downward sense, received by that unit area.
For the flux density scalar for the prescribed direction and sense, we may write formula_11 where with the notation above, formula_12 indicates that the integration extends only over the solid angles of the relevant hemisphere, and formula_13 denotes the angle between formula_6 and the prescribed direction.
The term formula_15 is needed on account of Lambert's law.
Mathematically, the quantity formula_16 is not a vector because it is a positive scalar-valued function of the prescribed direction and sense, in this example, of the downward vertical.
In this example, when the collected radiation is propagating in the downward sense, the detector is said to be "looking upwards".
The measurement can be made directly with an instrument (such as a pyrgeometer) that collects the measured radiation all at once from all the directions of the imaginary hemisphere; in this case, Lambert-cosine-weighted integration of the spectral radiance (or specific intensity) is not performed mathematically after the measurement; the Lambert-cosine-weighted integration has been performed by the physical process of measurement itself. 
"It's Whats Happenin' (subtitled The Varitone Sound of Clark Terry") is an album by American jazz trumpeter Clark Terry featuring performances recorded in 1967 for the Impulse!
label. 
The dead man zone is defined as the area directly around a bushfire that is likely to burn within five minutes given the current wind conditions or an anticipated change in wind direction.
The distance this zone extends from the firefront is highly dependent on terrain, windspeed, fuel type and composition, relative humidity and ambient temperature, and can range from under 100 m to well over 1 km.