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  2. Target hardening - Wikipedia

    en.wikipedia.org/wiki/Target_hardening

    Target hardening, also referred to simply as hardening when made clear by the context, is a term used by police officers, those working in security, and the military referring to the strengthening of the security of a building or installation in order to protect it in the event of attack or reduce the risk of theft.

  3. AP Art History - Wikipedia

    en.wikipedia.org/wiki/AP_Art_History

    Advanced Placement (AP) Art History (also known as APAH) is an Advanced Placement art history course and exam offered by the College Board in the United States.. AP Art History is designed to allow students to examine major forms of artistic expression relevant to a variety of cultures evident in a wide variety of periods from the present to the past.

  4. Crime prevention through environmental design - Wikipedia

    en.wikipedia.org/wiki/Crime_prevention_through...

    Territorial reinforcement promotes social control through a variety of measures. Image/maintenance and activity support provide the community with reassurance and the ability to inhibit crime through citizen activities. Target hardening strategies work within CPTED, delaying entry sufficiently to ensure a certainty of capture in the criminal mind.

  5. Hostile vehicle mitigation - Wikipedia

    en.wikipedia.org/wiki/Hostile_vehicle_mitigation

    This hostile vehicle mitigation is a common form of target hardening and is designed to prevent a vehicle being rammed into the building or into people on the pavement next to the building. It also enforces a zone of protective stand-off from any explosive detonation location.

  6. Armour-piercing, capped, ballistic capped shell - Wikipedia

    en.wikipedia.org/wiki/Armour-piercing,_capped...

    The configuration consists of an armour-piercing shell fitted with a stubby armour-piercing cap (AP cap) for improved penetration properties against surface hardened armour, especially at high impact angles, [1] and an aerodynamic ballistic cap on top of the AP cap to correct for the poorer aerodynamics, especially higher drag, otherwise ...

  7. Bonding in solids - Wikipedia

    en.wikipedia.org/wiki/Bonding_in_solids

    Intermediate organization of covalent bonds: Regarding the organization of covalent bonds, recall that classic molecular solids, as stated above, consist of small, non-polar covalent molecules. The example given, paraffin wax , is a member of a family of hydrocarbon molecules of differing chain lengths, with high-density polyethylene at the ...

  8. Chemical polarity - Wikipedia

    en.wikipedia.org/wiki/Chemical_polarity

    Bond polarity is typically divided into three groups that are loosely based on the difference in electronegativity between the two bonded atoms. According to the Pauling scale: Nonpolar bonds generally occur when the difference in electronegativity between the two atoms is less than 0.5

  9. Metallic bonding - Wikipedia

    en.wikipedia.org/wiki/Metallic_bonding

    Metallic bonding is mostly non-polar, because even in alloys there is little difference among the electronegativities of the atoms participating in the bonding interaction (and, in pure elemental metals, none at all). Thus, metallic bonding is an extremely delocalized communal form of covalent bonding.