Abstract: Barricade devices and methods of barricading a door are disclosed. Such devices and methods may be used to barricade a door, and thereby prevent an intruder from entering a sheltering space, such as a classroom, storeroom, or hallway. The barricade-device may have a pivotable stop-device that is pivotable from a location adjacent to a door. The pivot-location may be at an elevation that is lower than a door handle. The stop-device may be pivotable from a reserve-position to a stop-position. In the reserve-position, the stop-device does not barricade the door. In the barricade-position, the stop-device barricades the door. Operation of the barricade-device may require the application of an activation operation to an activator. A wide range of people having differing physical and mental capabilities may use the barricade-device properly and quickly.

Abstract: Barricade devices and methods of barricading a door are disclosed. Such devices and methods may be used to barricade a door, and thereby prevent an intruder from entering a sheltering space, such as a classroom, storeroom, or hallway. The barricade-device may have a pivotable stop-device that is pivotable from a location adjacent to a door. The pivot-location may be at an elevation that is lower than a door handle. The stop-device may be pivotable from a reserve-position to a stop-position. In the reserve-position, the stop-device does not barricade the door. In the barricade-position, the stop-device barricades the door. Operation of the barricade-device may require the application of an activation operation to an activator. A wide range of people having differing physical and mental capabilities may use the barricade-device properly and quickly.

Abstract: Barricade devices and methods of barricading a door are disclosed. Such devices and methods may be used to barricade a door, and thereby prevent an intruder from entering a sheltering space, such as a classroom, storeroom, or hallway. The barricade-device may have a pivotable stop-device that is pivotable from a location adjacent to a door. The pivot-location may be at an elevation that is lower than a door handle. The stop-device may be pivotable from a reserve-position to a stop-position. In the reserve-position, the stop-device does not barricade the door. In the barricade-position, the stop-device barricades the door. Operation of the barricade-device may require the application of an activation operation to an activator. A wide range of people having differing physical and mental capabilities may use the barricade-device properly and quickly.

Abstract: Barricade devices and methods of barricading a door are disclosed. Such devices and methods may be used to barricade a door, and thereby prevent an intruder from entering a sheltering space, such as a classroom, storeroom, or hallway. The barricade-device may have a pivotable stop-device that is pivotable from a location adjacent to a door. The pivot-location may be at an elevation that is lower than a door handle on the door. The stop-device may be pivotable from a reserve-position to a stop-position. In the reserve-position, the stop-device does not barricade the door. In the barricade-position, the stop-device barricades the door. Operation of the barricade-device may require the use of one or more major muscle groups of the body, but need not require precise dexterity of the fingers or hands (e.g. such as that required to manipulate small keys, latches, and/or the grasping and turning of assemblies).

Abstract: Barricade devices and methods of barricading a door are disclosed. Such devices and methods may be used to barricade a door, and thereby prevent an intruder from entering a sheltering space, such as a classroom, storeroom, or hallway. The barricade-device may have a pivotable stop-device that is pivotable from a location adjacent to a door. The pivot-location may be at an elevation that is lower than a door handle on the door. The stop-device may be pivotable from a reserve-position to a stop-position. In the reserve-position, the stop-device does not barricade the door. In the barricade-position, the stop-device barricades the door. Operation of the barricade-device may require the use of one or more major muscle groups of the body, but need not require precise dexterity of the fingers or hands (e.g. such as that required to manipulate small keys, latches, and/or the grasping and turning of assemblies).

Abstract: A barricade device and a method of barricading a door are disclosed. The device and method may be used to barricade a door, and thereby prevent an intruder from entering a sheltering space, such as a classroom, storeroom, or hallway. The barricade-device may have a pivotable stop-device that is pivotable from a location adjacent to a door. The pivot-location may be at an elevation that is lower than a door handle on the door. The stop-device may be pivotable from a reserve-position to a stop-position. In the reserve-position, the stop-device does not barricade the door. In the barricade-position, the stop-device barricades the door.

Abstract: Methods and systems for treating contaminated flow-back water produced by hydraulic fracture are provided. The method involves precipitating metals from the flow-back water stream in a first reaction using at least one oxidizing agent, at least one pH adjusting agent, a source of sulfate and carbonate ions, and at least one co-precipitation agent. The precipitated metals may be dewatered using a first filter and may be used as an additive to drilling mud. The flow-back water may be further purified in a second reaction by addition of at least one pH adjusting agent and hydrated lime to precipitate salts. The precipitated salts may be dewatered using a second filter and may be used as an accelerating additive to concrete. The purified flow-back water may be stabilized by the addition of at least one pH adjusting agent to provide a water stream that may be reused in the hydraulic fracture drilling process.

Abstract: A barricade device and a method of barricading a door are disclosed. The device and method may be used to barricade a door, and thereby prevent an intruder from entering a sheltering space, such as a classroom, storeroom, or hallway. The barricade-device may have a pivotable stop-device that is pivotable from a location adjacent to a door. The pivot-location may be at an elevation that is lower than a door handle on the door. The stop-device may be pivotable from a reserve-position to a stop-position. In the reserve-position, the stop-device does not barricade the door. In the barricade-position, the stop-device barricades the door.

Abstract: Methods and systems for treating contaminated flow-back water produced by hydraulic fracture are provided. The method involves precipitating metals from the flow-back water stream in a first reaction using at least one oxidizing agent, at least one pH adjusting agent, a source of sulfate and carbonate ions, and at least one co-precipitation agent. The precipitated metals may be dewatered using a first filter and may be used as an additive to drilling mud. The flow-back water may be further purified in a second reaction by addition of at least one pH adjusting agent and hydrated lime to precipitate salts. The precipitated salts may be dewatered using a second filter and may be used as an accelerating additive to concrete. The purified flow-back water may be stabilized by the addition of at least one pH adjusting agent to provide a water stream that may be reused in the hydraulic fracture drilling process.

Abstract: An evaporator or distillation apparatus includes an inlet supply line for supplying an influent liquid, a heater configured to heat the influent liquid supplied by the inlet supply line, and a plurality of cells. Each cell includes an outer surface defining an interior chamber, an inlet, a vapor outlet, a concentrate outlet, and an inner conduit in fluid communication with the inlet. At least a portion of the inner conduit is positioned within the interior chamber. The vapor outlets of the plurality of cells are connected to each other in a parallel configuration and the inlet supply line is connected to the inlet of each cell.