Abstract: Disclosed is a system that includes a plurality of battery cells connected in series; a first connection path from an intermediate battery cell of the plurality to an output bus of the system; a second connection path from a last one of the plurality of battery cells to an output bus; a circuit switch installed along the second connection path, the circuit switch configured to open or close the second connection path; and an undervoltage relay in the output bus, wherein the undervoltage relay is set at a threshold voltage, and wherein the undervoltage relay is configured to control the circuit switch when a voltage on the output bus exceeds the threshold voltage or drops below the threshold voltage.

Abstract: Disclosed is a system that includes a plurality of battery cells connected in series; a first connection path from an intermediate battery cell of the plurality to an output bus of the system; a second connection path from a last one of the plurality of battery cells to an output bus; a circuit switch installed along the second connection path, the circuit switch configured to open or close the second connection path; and an undervoltage relay in the output bus, wherein the undervoltage relay is set at a threshold voltage, and wherein the undervoltage relay is configured to control the circuit switch when a voltage on the output bus exceeds the threshold voltage or drops below the threshold voltage.

Abstract: A system, a method, and a computer program that extend a public Wi-Fi hotspot of an Internet service provider network to a private enterprise network system to transport non-enterprise traffic between the Internet service provider network and a non-enterprise computing device. The system, method, and computer program provide one or more tunnels between access points in the private enterprise network system and the Internet service provider network. The tunnels can be formed between one or more Internet service provider mobility controllers and, via a firewall, a DMZ (demilitarized zone) in the private enterprise network system to facilitate secure communication between the non-enterprise communicating devices and the Internet service provider network.

Abstract: A system, a method, and a computer program that extend a public Wi-Fi hotspot of an Internet service provider network to a private enterprise network system to transport non-enterprise traffic between the Internet service provider network and a non-enterprise computing device. The system, method, and computer program provide one or more tunnels between access points in the private enterprise network system and the Internet service provider network. The tunnels can be formed between one or more Internet service provider mobility controllers and, via a firewall, a DMZ (demilitarized zone) in the private enterprise network system to facilitate secure communication between the non-enterprise communicating devices and the Internet service provider network.

Abstract: A downhole tool that includes a tractor for assisting movement of the tool through deviated portions of a wellbore. The tractor includes a working fluid that damps vibrations in the tractor by adjusting the viscosity in the fluid. In an example, the working fluid is a magnetorheological fluid that has a viscosity that changes in response to applied electrical energy. The working fluid, which may be used for powering actuators on the tractor, may contain a suspension of magnetic particles.

Abstract: A communication device that communicates via a base station through a radio link that includes: a display that displays an inquiry from a plurality of inquiries, a first input, which upon being activated, indicates an agreement in response to the inquiry, a second input, which upon being activated, indicates a disagreement in response to the inquiry, an emergency input, which upon being activated, indicates an emergency situation, a controller that selects and dials the phone number corresponding to the contact name from a plurality of phone numbers corresponding to a plurality of contact names based on the indicated agreement, the indicated disagreement, and the indicated emergency situation, such that the agreement and the disagreement with each inquiry of the plurality of inquiries guides the controller in selecting and dialing the phone number corresponding to the contact name from the plurality of phone numbers.

Abstract: A communication device that communicates via a base station through a radio link that includes: a display that displays an inquiry from a plurality of inquiries, a first input, which upon being activated, indicates an agreement in response to the inquiry, a second input, which upon being activated, indicates a disagreement in response to the inquiry, an emergency input, which upon being activated, indicates an emergency situation, a controller that selects and dials the phone number corresponding to the contact name from a plurality of phone numbers corresponding to a plurality of contact names based on the indicated agreement, the indicated disagreement, and the indicated emergency situation, such that the agreement and the disagreement with each inquiry of the plurality of inquiries guides the controller in selecting and dialing the phone number corresponding to the contact name from the plurality of phone numbers.

Abstract: A downhole tool that includes a tractor for assisting movement of the tool through deviated portions of a wellbore. The tractor includes a working fluid that damps vibrations in the tractor by adjusting the viscosity in the fluid. In an example, the working fluid is a magnetorheological fluid that has a viscosity that changes in response to applied electrical energy. The working fluid, which may be used for powering actuators on the tractor, may contain a suspension of magnetic particles.