Abstract: Concepts and technologies are disclosed herein for event-based security challenges. A computer can execute a security application. The computer can receive a request for authentication information associated with a user device. The computer can access event data corresponding to the user device. The computer can generate, based upon the event data, a challenge question and a response to the challenge question. The computer can provide data indicating the challenge question and the response to a requestor associated with the request.

Abstract: Concepts and technologies are disclosed herein for event-based security challenges. A computer can execute a security application. The computer can receive a request for authentication information associated with a user device. The computer can access event data corresponding to the user device. The computer can generate, based upon the event data, a challenge question and a response to the challenge question. The computer can provide data indicating the challenge question and the response to a requestor associated with the request.

Abstract: Concepts and technologies are disclosed herein for event-based security challenges. A computer can execute a security application. The computer can receive a request for authentication information associated with a user device. The computer can access event data corresponding to the user device. The computer can generate, based upon the event data, a challenge question and a response to the challenge question. The computer can provide data indicating the challenge question and the response to a requestor associated with the request.

Abstract: Concepts and technologies are disclosed herein for event-based security challenges. A computer can execute a security application. The computer can receive a request for authentication information associated with a user device. The computer can access event data corresponding to the user device. The computer can generate, based upon the event data, a challenge question and a response to the challenge question. The computer can provide data indicating the challenge question and the response to a requestor associated with the request.

Abstract: Concepts and technologies are disclosed herein for event-based security challenges. A computer can execute a security application. The computer can receive a request for authentication information associated with a user device. The computer can access event data corresponding to the user device. The computer can generate, based upon the event data, a challenge question and a response to the challenge question. The computer can provide data indicating the challenge question and the response to a requestor associated with the request.

Abstract: Concepts and technologies are disclosed herein for event-based security challenges. A computer can execute a security application. The computer can receive a request for authentication information associated with a user device. The computer can access event data corresponding to the user device. The computer can generate, based upon the event data, a challenge question and a response to the challenge question. The computer can provide data indicating the challenge question and the response to a requestor associated with the request.

Abstract: A test method for a data processing device includes determining both a current state of the device and a desired state of the device. A set of instructions to transition the data processing device from the current state to the target state is obtained by initially selecting a first source state from a set of possible source states and corresponding instructions that can transition the device to the desired state. The instruction associated with the first source state is placed on an instruction stack. The source state and instruction selection process is repeated until the selected source state corresponds to the current state of the device under test. The instructions in the stack are applied to the device under test, and the resulting device state compared to the specified state to determine a test result.

Abstract: An arterio-venous graft includes an implantable tubular member and a flow regulator. The implantable tubular member has a first end and a second end generally opposite the first end. The flow regulator is between the first end and the second end. The flow regulator is configured to regulate fluid flow between the first end and the second end. A method of regulating pressure in an arterio-venous graft includes reversibly adjusting a cross-sectional area of the graft. A method of fluidly coupling an artery and a vein includes connecting a first end of an implantable tubular member to the artery and connecting a second end of the implantable tubular member to the vein. A cross-sectional area of the implantable tubular member is reversibly adjustable.

Abstract: A test method for a data processing device includes determining both a current state of the device and a desired state of the device. A set of instructions to transition the data processing device from the current state to the target state is obtained by initially selecting a first source state from a set of possible source states and corresponding instructions that can transition the device to the desired state. The instruction associated with the first source state is placed on an instruction stack. The source state and instruction selection process is repeated until the selected source state corresponds to the current state of the device under test. The instructions in the stack are applied to the device under test, and the resulting device state compared to the specified state to determine a test result.

Abstract: Controlling ignition current in the ignition control system of an internal combustion engine includes determining the amount of time it takes current in the ignition coil to reach a desired or limit value and adjusting the time of starting ignition coil charging before spark firing to be substantially equal to the amount of time it takes ignition coil charging current to reach the desired or limit current value.

Abstract: Controlling ignition current in the ignition control system of an internal combustion engine includes determining the amount of time it takes current in the ignition coil to reach a desired or limit value and adjusting the time of starting ignition coil charging before spark firing to be substantially equal to the amount of time it takes ignition coil charging current to reach the desired or limit current value.