Abstract: A personally portable solar-powered electrical energy source includes a personally portable chassis; an array of solar cells mounted on the chassis, with the solar cells being adapted to generate electrical energy from light captured by the solar cells; a battery charger disposed in the chassis and so coupled to the solar cells as to be able to charge a battery installed in the chassis with the electrical energy generated by the solar cells; and at least one electrical outlet disposed in the chassis and adapted for providing electrical energy to an external electrical device from a said installed battery. The solar-powered electrical energy source can provide electrical energy to an electrically chargeable external electrical device, such as cell phone, and thereby charge the electrically chargeable external electrical device.

Abstract: A system for controlling communication-access within a computer network, includes an access-prevention device connected in series with a computer's bi-directional network-communication port for preventing the computer from receiving and/or transmitting any communications from and/or to another computer within the network; and a control device for selectively controlling the access-prevention device. Such an access-prevention device including a control terminal for connection to the control device is disposed within a communication-access control apparatus that may be connected between the computer network and the computer. Alternatively, the access-prevention device is disposed within the computer chassis, the modem, an external network-access terminal or a firewall device. The control device includes a manual switch actuator disposed on a chassis containing the access-prevention device, or a remote-control device, or a computer keyboard or a mouse, or a presence detector, or an inactivity detector.

Abstract: A system for controlling communication-access within a computer network, includes an access-prevention device connected in series with a computer's bi-directional network-communication port for preventing the computer from receiving and/or transmitting any communications from and/or to another computer within the network; and a control device for selectively controlling the access-prevention device. Such an access-prevention device including a control terminal for connection to the control device is disposed within a communication-access control apparatus that may be connected between the computer network and the computer. Alternatively, the access-prevention device is disposed within the computer chassis, the modem, an external network-access terminal or a firewall device. The control device includes a manual switch actuator disposed on a chassis containing the access-prevention device, or a remote-control device, or a computer keyboard or a mouse, or a presence detector, or an inactivity detector.