Abstract: A pipeline inspection system includes a pipeline pig having a controller and a plurality of ultrasonic transducer elements situated in an array. Each of the plurality of ultrasonic transducer elements emits an ultrasonic signal into a wall of a pipeline and receives echoes of the ultrasonic signal from the pipeline wall. The controller selects a first subset of the plurality of ultrasonic transducer elements from which to emit the ultrasonic signals into the wall of the pipeline as the pipeline pig passes through the pipeline, analyzes the echoes of the ultrasonic signals received by the plurality of ultrasonic transducer elements to detect a feature in the pipeline wall, and selects a second subset of the plurality of ultrasonic transducer elements to emit the ultrasonic signals into the wall of the pipeline as the pipeline pig passes through the pipeline when the feature is detected in the pipeline wall.

Abstract: A pipeline inspection system includes a pipeline pig having a controller and a plurality of ultrasonic transducer elements situated in an array. Each of the plurality of ultrasonic transducer elements emits an ultrasonic signal into a wall of a pipeline and receives echoes of the ultrasonic signal from the pipeline wall. The controller selects a first subset of the plurality of ultrasonic transducer elements from which to emit the ultrasonic signals into the wall of the pipeline as the pipeline pig passes through the pipeline, analyzes the echoes of the ultrasonic signals received by the plurality of ultrasonic transducer elements to detect a feature in the pipeline wall, and selects a second subset of the plurality of ultrasonic transducer elements to emit the ultrasonic signals into the wall of the pipeline as the pipeline pig passes through the pipeline when the feature is detected in the pipeline wall.

Abstract: A method includes emitting an ultrasonic signal into a test specimen from a transducer, receiving a first reflected ultrasonic signal from the test specimen, wherein the first reflected ultrasonic signal is reflected from a feature in the test specimen and the first reflected ultrasonic signal is internally reflected within the test specimen three times prior to being received, and determining a threshold depth of the feature in the test specimen based on receiving the first reflected ultrasonic signal.

Abstract: A pipeline inspection system includes a pipeline pig having a controller and a plurality of ultrasonic transducer elements situated in an array. Each of the plurality of ultrasonic transducer elements emits an ultrasonic signal into a wall of a pipeline and receives echoes of the ultrasonic signal from the pipeline wall. The controller selects a first subset of the plurality of ultrasonic transducer elements from which to emit the ultrasonic signals into the wall of the pipeline as the pipeline pig passes through the pipeline, analyzes the echoes of the ultrasonic signals received by the plurality of ultrasonic transducer elements to detect a feature in the pipeline wall, and selects a second subset of the plurality of ultrasonic transducer elements to emit the ultrasonic signals into the wall of the pipeline as the pipeline pig passes through the pipeline when the feature is detected in the pipeline wall.

Abstract: A pipeline inspection system includes a pipeline pig having a controller and a plurality of ultrasonic transducer elements situated in an array. Each of the plurality of ultrasonic transducer elements emits an ultrasonic signal into a wall of a pipeline and receives echoes of the ultrasonic signal from the pipeline wall. The controller selects a first subset of the plurality of ultrasonic transducer elements from which to emit the ultrasonic signals into the wall of the pipeline as the pipeline pig passes through the pipeline, analyzes the echoes of the ultrasonic signals received by the plurality of ultrasonic transducer elements to detect a feature in the pipeline wall, and selects a second subset of the plurality of ultrasonic transducer elements to emit the ultrasonic signals into the wall of the pipeline as the pipeline pig passes through the pipeline when the feature is detected in the pipeline wall.

Abstract: A method includes emitting an ultrasonic signal into a test specimen from a transducer, receiving a first reflected ultrasonic signal from the test specimen, wherein the first reflected ultrasonic signal is reflected from a feature in the test specimen and the first reflected ultrasonic signal is internally reflected within the test specimen three times prior to being received, and determining a threshold depth of the feature in the test specimen based on receiving the first reflected ultrasonic signal.

Abstract: A method includes emitting an ultrasonic signal into a test specimen from a transducer, receiving a first reflected ultrasonic signal from the test specimen, wherein the first reflected ultrasonic signal is reflected from a feature in the test specimen and the first reflected ultrasonic signal is internally reflected within the test specimen three times prior to being received, and determining a threshold depth of the feature in the test specimen based on receiving the first reflected ultrasonic signal.

Abstract: A method includes emitting an ultrasonic signal into a test specimen from a transducer, receiving a first reflected ultrasonic signal from the test specimen, wherein the first reflected ultrasonic signal is reflected from a feature in the test specimen and the first reflected ultrasonic signal is internally reflected within the test specimen three times prior to being received, and determining a threshold depth of the feature in the test specimen based on receiving the first reflected ultrasonic signal.

Abstract: Methods and architectures for turbo decoding are presented. The methods are such that low energy consumption is obtained with reduced memory requirements. Moreover the methods show improved performance with respect to latency.

Abstract: Methods and apparatus wherein subsequent permutation and inverse permutation operations provide inputs in correct order for first and second processes. Processes needing inputs in original order and processes needing inputs in permutated order can be distinguished, thereby using one of the processes as reference process. Permutation and inverse permutation operations which can fit into a turbo coding system and in systems applying the turbo coding principle. At least one permutation and one inverse permutation operation can be performed subsequently. Permutation and inverse permutation operations may be altered by scheduling linear writing and reading operation and permutated or inverse permutated writing and reading operations. These methods enable parallel execution of sub-processes, where the processes producing and consuming data can be performed in a parallel way, and the writing and reading operations to and from a memory can be performed in a parallel way.

Abstract: Methods and architectures for turbo decoding are presented. The methods are such that low energy consumption is obtained with reduced memory requirements. Moreover the methods show improved performance with respect to latency.

Abstract: Methods and architectures for turbo decoding are presented. The methods are such that low energy consumption is obtained with reduced memory requirements. Moreover the methods show improved performance with respect to latency.

Abstract: Methods and apparatus are described wherein subsequent permutation and inverse permutation operations provide inputs in correct order for first and second processes. Processes needing inputs in original order and processes needing inputs in permutated order can be distinguished, thereby using one of said processes as reference process. Permutation and inverse permutation operations are described which can fit into a turbo coding system and in systems applying the turbo coding principle. At least one permutation and one inverse permutation operation can be performed subsequently. Permutation and inverse permutation operations may be altered by scheduling linear writing and reading operations and permutated or inverse permutated writing and reading operations. These methods enable parallel execution of sub-processes, where the processes producing and consuming data can be performed in a parallel way, and the writing and the reading operations to and from a memory can be performed in a parallel way.