Abstract: An electrical circuit includes a switch, an energy harvesting circuit coupled to the switch to collect power from the voltage drop across the switch, and a control circuit coupled to the energy harvesting circuit to maintain the switch in an ‘on’ state in response to current flow through the switch and to turn off the switch in response to no current flow through the switch.

Abstract: This disclosure relates to systems and methods for managing multiple messages. In one example, a method includes determining a message transmission frequency threshold for a member of an online social networking service using responses from the member; receiving a message that is to be transmitted to the member; storing the message, without transmitting the message to the member, in a digest of messages for the member; and transmitting the digest to the member in response to a send score for the digest exceeding a send score threshold, the send score calculated using the number of messages in the digest.

Abstract: A mid-turbine frame for a gas turbine engine according to an example of the present disclosure includes, among other things, a first frame case, a flange coupled to the first frame case, and a heat shield adjacent to the flange. A method of cooling a portion of a gas turbine engine is also disclosed.

Abstract: Systems and methods are disclosed for monitoring models for bias. In one implementation, a system for automatically assessing a deployed model for selection of a cohort may include a processing device programmed to: apply the deployed model to data representing a first plurality of individuals, the data including at least one characteristic of the first plurality of individuals; based on the application, select a subset of the first plurality of individuals as a cohort; receive data representing a second plurality of individuals labeled as within the cohort, the data including the at least one characteristic of the second plurality of individuals; compare the selected subset and the second plurality of individuals along the at least one characteristic; and determine whether the comparison results in a difference between the selected subset and the second plurality of individuals greater than a threshold.

Abstract: Systems and methods are disclosed for monitoring models for bias. In one implementation, a system for automatically assessing a deployed model for selection of a cohort may include a processing device programmed to: apply the deployed model to data representing a first plurality of individuals, the data including at least one characteristic of the first plurality of individuals; based on the application, select a subset of the first plurality of individuals as a cohort; receive data representing a second plurality of individuals labeled as within the cohort, the data including the at least one characteristic of the second plurality of individuals; compare the selected subset and the second plurality of individuals along the at least one characteristic; and determine whether the comparison results in a difference between the selected subset and the second plurality of individuals greater than a threshold.

Abstract: A computer implemented method for access control for a consumer accessing a restricted resource in a network connected computer system, the method: including receiving a continuous sequence of data records relating to use, by the consumer, of the restricted resource, the resource being accessed by the consumer over an access network; continuously comparing the data records with an access control policy for the restricted resource; in response to a determination that the behavior is non-compliant with respect to the policy, generating and communicating a shared secret to the consumer, the shared secret being communicated via a communications channel other than the access network; receiving a response to a challenge from the user via the access network; and notifying the computer system that access to the resource by the consumer should be precluded based on a comparison of the response to the challenge and the shared-secret.

Abstract: A photovoltaic array system includes multiple strings of series coupled photovoltaic modules to provide current at a voltage dependent on the number of modules in each string and their operating efficiency. Each string is coupled to a DC-to-DC converter to convert the current from each string for output to a DC bus. An inverter is coupled to DC bus to convert the current from the strings of series coupled photovoltaic modules to AC current at a grid-compatible voltage.

Abstract: This invention relates to novel phosphorous ligands useful for organic transformations. Methods of making and using the ligands in organic synthesis are described. The invention also relates to processes for preparing the novel ligands.

Abstract: Provided are systems and methods for monitoring the position of a handle of a material handling vehicle comprising a handle, a first sensor positioned along the material handling vehicle, a second sensor positioned along the handle, and a controller configured to retrieve first positional information from the first sensor, retrieve second positional information from the second sensor, and compare the first positional information with the second positional information. The controller can adjust the operation of at least one of a lift motor and a drive motor of the material handling vehicle based on the comparison of the first positional information with the second positional information.

Abstract: Disclosed herein is a computer implemented method for receiving code distributed by a base station at a target device via a network, the distribution being made to one or more destination devices including the target device via one or more distribution servers arranged between the base station and the one or more devices on the network, wherein the base station maintains a first blockchain data structure storing one or more blocks and having a state determined by a most recently committed block in the first blockchain.

Abstract: A power conversion topology and control method intended for use with a DC bus is disclosed, providing a means to prevent the flow of ground fault current while detecting a fault condition and optionally continuing to operate the DC bus. In one control configuration, a DC-DC power stage with an active current control loop drives differential current to zero, and a separate voltage control loop maintains the desired differential bus voltage. Absolute bus voltage with respect to ground is monitored in order to detect fault conditions. In another configuration, the absolute voltage of the bus with respect to ground is controlled and differential bus current is monitored to detect ground fault conditions.

Abstract: A system for conflict resolution in a multi-user design package includes a host computer having a memory and a processor, wherein the host computer is configured to operate a multi-user CAx environment, and is configured to receive edit commands from a plurality of local computers. A conflict resolution module is configured to be executed by the host computer, and the conflict resolution module is configured to prevent implementation of conflicting edit commands received from the plurality of local computers in the multi-user CAx environment.

Abstract: A centralized server, such as in a cloud environment, is provided generally connected to a plurality of clients that independently maintain data that is also maintained in the centralized server. The centralized server possessing an authoritative Bloom filter series comprising at least a plurality of Bloom filters each with successive Bloom filter entries that periodically provide and update a copy of the authoritative Bloom filter series at each of the clients. Each client checks to see if a data file is present locally by searching for a corresponding Bloom filter entry in the copy of the Bloom filter series before seeking the data file in the centralized server.

Abstract: An apparatus includes a database configured to store a collection of files. The apparatus also includes a counter module configured to calculate a frequency of a data feature in the collection of files. The apparatus also includes a signature generation module operatively coupled to the counter module. The signature generation module is configured to generate a malware signature based on the frequency of the data feature in the collection of files. The malware signature includes an indication of one or more criterion for the data feature, and the malware signature is associated with a malware. The apparatus also includes a communication module configured to receive a target file, and a detection module operatively coupled to the communication module. The detection module is configured to classify the target file as the malware when the target file meets the one or more criterion of the malware signature.

Abstract: Disclosed herein is a computer implemented method for receiving code distributed by a base station at a target device via a network, the distribution being made to one or more destination devices including the target device via one or more distribution servers arranged between the base station and the one or more devices on the network, wherein the base station maintains a first blockchain data structure storing one or more blocks and having a state determined by a most recently committed block in the first blockchain.

Abstract: A method of cooling a portion of a gas turbine engine includes positioning a tie rod relative to an inner frame case. The tie rod includes a bushing opening and the inner frame case includes a fastener opening. A fastener is secured through the fastener opening in the inner frame case to a threaded bushing located in the bushing opening. The threaded bushing includes a distal end that forms a clearance gap with the inner frame case. Heat is transferred from the fastener through the threaded bushing to prevent the fastener from creeping.

Abstract: A system for collaborating on a component according to an example of the present disclosure includes, among other things, a computing device that has a processor and a memory storage device. The processor is configured to execute a first multi-user computer-aided technologies (CAx) environment that has a data module and a comparison module. The data module is configured to access at least one database corresponding to a component design. The component design has a plurality of features each corresponding to a group of feature types, and each of the plurality of features establishes a respective spatial boundary. The comparison module is configured to cause a first feature and a second feature of the plurality of features to merge into a resultant feature of the component design in response to determining that the spatial boundary of the first feature and the spatial boundary of the second feature share a common interface.

Abstract: A system for facilitating multi-user computer aided design includes a plurality of locally stored multi-user design (CAx) environments. A server includes a server side CAx environment. The server is communicatively coupled to each of the locally stored CAx environments. The server side CAx environment further includes a predictive modeling module operable to receive an incomplete command from a first user, and predict a complete command based on the incomplete command.

Abstract: In some embodiments, a processor can receive an input string associated with a potentially malicious artifact and convert each character in the input string into a vector of values to define a character matrix. The processor can apply a convolution matrix to a first window of the character matrix to define a first subscore, apply the convolution matrix to a second window of the character matrix to define a second subscore and combine the first subscore and the second subscore to define a score for the convolution matrix. The processor can provide the score for the convolution matrix as an input to a machine learning threat model, identify the potentially malicious artifact as malicious based on an output of the machine learning threat model, and perform a remedial action on the potentially malicious artifact based on identifying the potentially malicious artifact as malicious.

Abstract: A photovoltaic array system includes multiple strings of series coupled photovoltaic modules to provide current at a voltage dependent on the number of modules in each string and their operating efficiency. Each string is coupled to a DC-to-DC converter to convert the current from each string for output to a DC bus. An inverter is coupled to DC bus to convert the current from the strings of series coupled photovoltaic modules to AC current at a grid-compatible voltage.