Abstract: A parent mobile device sends a communication to a child mobile device, such as a phone call or an SMS message. The child device has an application installed which responds to the communication by determining whether receipt of the communication satisfies a mobile-device-lock-down criteria. When the communication satisfies the lock down criteria, the mobile device selectively limits functionality of the mobile device based on the determination. A child using the mobile device may attempt to unlock the device, for example, by returning a phone call to the parent device. When an attempt is made to unlock the mobile device, the application determines whether the attempt satisfies a mobile-device-unlock criteria. The application selectively restores functionality of the mobile device based on the determination of whether the attempt satisfies the mobile-device-unlock criteria.

Abstract: A system for, and method of, removing particulate material from wastewater discharged from an industrial source.

Abstract: A system for and method of removing particulate material from wastewater discharged from an industrial source. The method using filtration, sedimentation, coagulation and skimming to remove the particulate material from the wastewater.