Abstract: A frequency measurement system and method of a radio frequency (RF) signal. The frequency measurement system includes: a magnetic field source module, a light source module, an excitation module, a complementary metal-oxide-semiconductor (CMOS) camera, and a signal processing module; the excitation module is disposed in the magnetic field; the excitation module is disposed on an output light path of the light source module; the CMOS camera is disposed on an output light path of the excitation module; and the CMOS camera is connected to the signal processing module; the light source module is configured to emit a laser; the CMOS camera is configured to capture an excitation image when the laser enters the excitation module to which a to-be-tested RF signal is applied; and the signal processing module is configured to determine a frequency of the to-be-tested RF signal according to the excitation image.

Abstract: A display panel including horizontal signal lines, vertical signal lines intersecting the horizontal signal lines, first transmission lines and second transmission lines is provided. The horizontal signal lines are divided into a first horizontal signal line group and an adjacent second horizontal signal line group. Each of the first and second horizontal signal line groups includes N horizontal lines, wherein N is a positive integer. The first transmission lines are positioned at a first side of the vertical signal lines and respectively connected to the N horizontal signal lines in the first horizontal signal line group in a first tendency. The second transmission lines are positioned at a second, opposite side of the vertical signal lines and respectively connected to the N horizontal signal lines in the second horizontal signal line group in a second tendency. The first tendency is opposite to the second tendency.

Abstract: A piece of electrical equipment for connecting both to at least one electromechanical braking actuator and also to at least one electromechanical drive actuator, the piece of electrical equipment (13a) comprising a housing (30), means for fastening the housing to the undercarriage, and inside the housing: a processor unit (32) arranged to generate a braking motor control signal and a drive motor control signal; a power supply unit (37) arranged to generate an equipment power supply voltage, a braking power supply voltage, and a drive power supply voltage; a power converter unit (40) arranged to generate a braking control voltage and a drive control voltage; and a distribution unit arranged to distribute the braking control voltage to the electromechanical braking actuator and the drive control voltage to the electromechanical drive actuator.

Abstract: A technique may include applying a first electrical signal to a first pair of drive electrodes, and, while applying the first electrical signal to the first pair of drive electrodes, determining a first measured voltage using a first measurement electrode. The technique further may include applying a second electrical signal to a second pair of drive electrodes, and, while applying the second electrical signal to the second pair of drive electrodes, determining a second measured voltage using a second, different measurement electrode. The first pair of drive electrodes, the second pair of drive electrodes, the first measurement electrode, and the second, different measurement electrode may from a set of N electrodes electrically coupled to the material. The technique also may include determining whether the material includes a crack or other defect based on a comparison between the first measured voltage and the second measured voltage.

Abstract: A semiconductor device in which a transistor has the characteristic of low off-state current is provided. The transistor comprises an oxide semiconductor layer having a channel region whose channel width is smaller than 70 nm. A temporal change in off-state current of the transistor over time can be represented by Formula (a2). In Formula (a2), IOFF represents the off-state current, t represents time during which the transistor is off, ? and ? are constants, ? is a constant that satisfies 0<??1, and CS is a constant that represents load capacitance of a source or a drain.

Abstract: A computer-implemented method for combined indoor and outdoor tracking using a tracking device is disclosed. In at least one embodiment of the method, a fingerprint of radio signals is generated by the device at a location to be determined. The location of the device is determined by applying trained functions to the fingerprint wherein the trained functions have been end-to-end trained using a plurality of fingerprints generated at known locations. Environmental sensor data may be used to predict a lifetime of a component tracked by the tracking device.

Abstract: A semiconductor storage device including an output pad, a first circuit connected to the output pad, a second circuit connected to the first circuit, a third circuit configured to output a first setting signal for controlling the first circuit accordance with a characteristic variation of the first circuit, and a fourth circuit configured to generate a second setting signal for controlling the second circuit in accordance with the first setting signal received from the third circuit and output the second setting signal to the second circuit.

Abstract: A measurement apparatus includes: a memory; and a processor coupled to the memory and configured to: acquire, for each of two samples which are objects made of a same material, have different sizes, and have similar shapes, magnetization curve data measured for the sample and a shape parameter including a dimension of the sample; calculate magnetization of an inner part of each of the samples based on the acquired magnetization curve data and shape parameter of the sample by using a model representing magnetization of the object by separating the magnetization of the object into a magnetization component of a surface part and a magnetization component of an inner part of the object in accordance with a volume ratio between the surface part and the inner part of the object; and output the calculated result.

Abstract: Peer-to-Peer Electronic token exchange systems and methods utilizing electricity generated and validated with a distributed ledger as the underlying physical value for the token.

Abstract: A method of operating a memory device comprises generating a target voltage using a pump circuit of the memory device, the target voltage to be applied to a word line or pillar of a memory cell of the memory device; providing an indication of current generated by the pump circuit after the pump circuit output reaches the target voltage; and determining when the current generated by the pump circuit is greater than a specified threshold current and generating a fault indication according to the determination.

Abstract: Systems, device and methods are provided for measuring parameters of a medium such as the dielectric properties of a medium including a plurality of layers, using an array of sensors. The array includes at least two transducers and at least one transceiver attached to the at least two transducers, the at least one transceiver being configured to transmit at least one signal toward the medium and receive a plurality of signals affected by the medium; a data acquisition unit and at least one processor unit, configured to: process the affected plurality of signals to yield a plurality of transfer functions wherein each of the plurality of transfer functions including the medium response between two transducers of the at least two transducers as function of frequency or time; process the plurality of transfer functions to yield a plurality of statistical measures, and process the statistical measures to calculate the medium parameters.

Abstract: A system and method for identifying a foreign object in a stack of media items is disclosed. An upper clamping plate and an opposing lower clamping plate are positioned to hold a received stack of media items. Each clamping plate has an array of capacitive electrodes positioned on an inner surface thereof. Each of the capacitive electrodes in the one array positioned directly across from a corresponding one in the first array to form a capacitive electrode pair. A controller measures the capacitance of each capacitive electrode pair when the received stack of media items is positioned between the clamping plates, determine if a foreign object is present within the received stack of media items based on the capacitance measurements from each capacitive electrode pair, and generate a signal indicating that a foreign object has been detected when a foreign object is determined to be present.

Abstract: Detecting whether a target device that includes multiple electronic components is genuine or suspected counterfeit by: performing a test sequence of energizing and de-energizing the target device and collecting electromagnetic interference (EMI) signals emitted by the target device; generating a target EMI fingerprint from the EMI signals collected; retrieving a plurality of reference EMI fingerprints from a database library, each of which corresponds to a different configuration of electronic components of a genuine device of the same make and model as the target device; iteratively comparing the target EMI fingerprint to the retrieved reference EMI fingerprints and generating a similarity metric between each compared set; and indicating that the target device (i) is genuine where the similarity metric for any individual reference EMI fingerprint satisfies a threshold test, and is a suspect counterfeit device where no similarity metric for any individual reference EMI fingerprint satisfies the test.

Abstract: A memory device comprises a memory array; a word line driver circuit including a charge pump circuit configured to generate a program voltage target to be applied to a word line to program a memory cell of the memory array, and a control loop to activate the charge pump circuit using a control signal according to a comparison of a pump circuit output voltage to the program voltage target; a sensor circuit that compares a duty cycle of the control signal to a specified duty cycle after the charge pump circuit output reaches the program voltage target, and provides an indication of current generated by the charge pump circuit according to the duty cycle; and logic circuitry that generates a fault indication when the current generated by the charge pump circuit is greater than a specified threshold current.

Abstract: A method and apparatus is disclosed for allowing a magnetic tracking system to detect, and operate in close proximity in the same physical environment with, additional magnetic tracking systems. The first user's magnetic tracking system that becomes active in the physical space becomes the master system, and assigns time slots for its own transmitting antennas to generate the magnetic field which is used to determine the position and orientation of the user's limbs relative to the user's head. The master system also determines when other magnetic tracking systems become active in the physical space and assigns to those systems identification codes and time slots for their transmitting antennas to generate a magnetic field so that the position and orientation of the user's hands relative to the user's head for each of those systems may be determined. By requiring each magnetic tracking system to operate in different time slots, there is no interference between the systems.

Abstract: Provided is a measurement device including an application unit, a detection unit, and a calculation unit. The application unit applies a first magnetic field, which is generated by applying a pulse current to a coil or applying currents with a plurality of frequencies to the coil in order, to an object. The detection unit detects a second magnetic field which is generated by applying the first magnetic field to the object. The calculation unit calculates a distribution of a magnetic field source m in the second magnetic field. The calculation unit may further generate an imaging signal for displaying the calculated distribution of the magnetic field source m, as an image. The display unit displays the image indicating the distribution of the magnetic field source m by using the imaging signal.

Abstract: A network system uses Wi-Fi signals or other types of short-range transmissions to determine navigation to pickup locations for users receiving services provided via the network system. In an embodiment, the network system builds a database of reference signatures of short-range transmissions previously detected by client devices of users at a geographical region, where the reference signatures are mapped to corresponding locations of the geographical region. By comparing a signature detected by a particular user's client device to the reference signatures, the network system may check for similarities between the short-range transmissions. Responsive to finding a match, the network system determines a current location of the particular user at the geographical region. Accordingly, by leveraging the database, the network system may determine a route for travel by the particular user from the current location to a pickup location without having to use GPS signals.

Abstract: This power cable junction (10) has an end part of a power cable which has an electrically insulating material (122). The junction (10) has a predetermined region containing a module for measuring the space charge of the insulating material (122).

Abstract: Systems include one or more critical datacenter connected to behind-the-meter flexible datacenters. The critical datacenter is powered by grid power and not necessarily collocated with the flexible datacenters, which are powered “behind the meter.” When a computational operation to be performed at the critical datacenter is identified and determined that it can be performed more efficiently or advantageously at a flexible datacenter, the computational operation is instead obtained by the flexible datacenters for performance. The critical datacenter and flexible datacenters preferably share a dedicated communication pathway to enable high-bandwidth, low-latency, secure data transmissions. A queue system may be used to organize computational operations waiting for distribution to either the critical datacenter or the flexible datacenter.

Abstract: An electronic device displays, on a display, a user interface of an application. The user interface includes a plurality of views arranged in a view hierarchy that defines a first relationship between a first view and a second view. The first view includes a first gesture recognizer, and the second view includes a second gesture recognizer. The device detects, via the input device, an input at a first location that corresponds to the displayed user interface, and processes the input using a gesture recognition hierarchy that includes the first gesture recognizer and the second gesture recognizer. A second relationship between the first gesture recognizer and the second gesture recognizer is determined based on the first relationship between the first view and the second view in the view hierarchy.

Abstract: Systems include one or more critical datacenter connected to behind-the-meter flexible datacenters. The critical datacenter is powered by grid power and not necessarily collocated with the flexible datacenters, which are powered “behind the meter.” When a computational operation to be performed at the critical datacenter is identified and determined that it can be performed more efficiently or advantageously at a flexible datacenter, the computational operation is instead obtained by the flexible datacenters for performance. The critical datacenter and flexible datacenters preferably share a dedicated communication pathway to enable high-bandwidth, low-latency, secure data transmissions. A queue system may be used to organize computational operations waiting for distribution to either the critical datacenter or the flexible datacenter.

Abstract: Systems and methods dynamically assess energy efficiency by obtaining a minimum energy consumption of a system, receiving in a substantially continuous way a measurement of actual energy consumption of the system, and comparing the minimum energy consumption to the measurement of actual energy consumption to calculate a substantially continuous energy performance assessment. The system further provides at least one of a theoretical minimum energy consumption based at least in part on theoretical performance limits of system components, an achievable minimum energy consumption based at least in part on specifications for high energy efficient equivalents of the system components, and the designed minimum energy consumption based at least in part on specifications for the system components.

Abstract: A rack switch coupling system includes computing devices positioned in a rack in a stacked orientation. A switch system positioned in the rack includes a circuit board with a processing system. Respective first ports are each located on the circuit board, coupled to the processing system via a respective trace on the circuit board, cabled to a respective one of the computing devices, and located adjacent its cabled computing device between a top plane and a bottom plane associated with that computing device. Respective second ports are each located off of the circuit board, coupled to the processing system via a respective trace on the circuit board and a respective cable extending between that trace and that second port, cabled to a respective one of the computing devices, and located adjacent its cabled computing device between a top plane and a bottom plane associated with that computing device.

Abstract: A position estimation unit (2) comprising a first transceiver device (3) and a processing unit (10) that is arranged to repeatedly calculate time-of-flight (TOF) for radio signals (x1, x2, x3, x4, x5, x6) sent pair-wise between two transceivers among the first transceiver device (3) and at least two other transceiver devices (7, 8, 9); calculate possible positions for the transceiver devices (3, 7, 8, 9), which results in possible positions for each transceiver device (3, 7, 8, 9); and perform Multidimensional scaling (MDS) calculation in order to obtain relative positions of the transceiver devices (3, 7, 8, 9) in a present coordinate system. After two initial MDS calculations, between every two consecutive MDS calculations, the processing unit (10) is arranged to repeatedly perform a processing procedure comprising translation, scaling and rotation of present coordinate system such that a corrected present coordinate system is acquired.

Abstract: A sonde is receivable in a housing of an inground tool for transmitting an electromagnetic locating signal. The sonde is configured for monitoring a cumulative active run-time of its operation and for external transfer of the cumulative active run-time. A receiver receives the cumulative active run-time and provides at least one indication based on the cumulative active run-time.

Abstract: FEA model representing a RSW setup is defined and received in a computer system. The FEA model contains multiple solid elements representing a pair of electrodes and two workpieces. Numerically-calculated heat-power distributions and structural behaviors of the workpieces are obtained by conducting a time-marching simulation using FEA model with a set of time-dependent electrode forces and corresponding set of time-dependent electrical current. An overlapped contact area and corresponding contact center between first and second element contact faces of each of the solid element pairs in contact are determined. Respective elemental coordinates of the contact center in the first and second element contact faces are calculated. Augmented terms for Joule heating effects are added to the overall stiffness matrix for obtaining Joule heat rate power at each contact center, which is then distributed to respective corner nodes of the first and second element contact faces according to respective elemental coordinates.

Abstract: Systems and methods are disclosed for power management by estimating power contingency of a grid at a cloud control center; performing decentralized real-time measurement and making local decisions at one more computer controlled outlets connected to the grid; and aggregating distributed loads to provide emergency frequency support to the grid.

Abstract: A system for performing an automated test is disclosed. The method comprises receiving a plurality of work orders and a plurality of constraints for scheduling a plurality of tests on a plurality of DUTs using automated test equipment (ATE) available on a production floor, wherein the ATE comprises a plurality of test cells, and wherein each test cell comprises a plurality of testers and an automated handler. The method further comprises developing a test plan to execute the plurality of tests, wherein the test plan is customized in accordance with the information in the plurality of work orders and the plurality of constraints. Finally, the method comprises scheduling the plurality of tests to the plurality of test cells to maximize throughput of the plurality of DUTs.

Abstract: A prober includes: a stage that places a substrate formed with a plurality of chips thereon in a matrix; a contact that sequentially contacts with electrode pads of the plurality of chips thereby performing an inspection on electrical characteristic of the plurality of chips; a plurality of LED units provided on a side opposite to a placing surface of the stage so as to independently heat a plurality of areas where the plurality of chips are located, respectively, and each including one or a plurality of LEDs; and a controller that outputs a control signal to drive, among the plurality of LED units, at least an LED unit corresponding to an area of a chip to be inspected, among the area of the chip to be inspected and peripheral areas of the corresponding area.

Abstract: A test apparatus for challenging contaminant monitoring apparatus. The test apparatus includes contaminant provisions having a pre-selected property including any one or more of the group including composition, material, mass, size and/or shape of a contaminant. The test apparatus also includes identification provisions for identifying the presence of the contaminant provisions and/or for identifying the identity of the test apparatus. The contaminant provisions and the identification provisions are detectable and/or discriminateable by X-rays.

Abstract: There is provided a power system stability analysis device that analyzes stability of a power system by obtaining measurement data from a high-accuracy measurement device and existing measuring instruments installed in the power system, the apparatus including: a system state estimation unit that estimates a system state of the power system by using measurement data from the existing measuring instruments at a plurality of points in the power system; a synchronous stability analysis unit that analyzes synchronous stability in an assumed failure by using an estimation result of the system state; and a synchronous stability analysis correction unit that corrects the synchronous stability according to a difference between the estimation result of the system state and the measurement data of the high-accuracy measurement device to improve accuracy of synchronous stability analysis of the power system.

Abstract: A method for weather adjustment of an electrical utility system. Data defining sequential events in the utility system is obtained, each event identified by three coordinate values: hour of day, recorded temperature, and resource usage. A three-dimensional topological surface is generated from the coordinate value, by plotting the resource usage against the hour and temperature in a three-dimensional space. A polynomial equation having calculated coefficients and a highest degree of six for each variable is generated to define the topological surface, wherein the polynomial equation expresses the resource usage as a tenth-degree polynomial function of hour of day and temperature. A future load on components of the system at a particular temperature and hour of day is determined by applying the coefficients to the coordinate values for the particular temperature and hour, and modifying the functionality of components of the electrical utility system based on the determined future load.

Abstract: Provided is a measurement device including an application unit, a detection unit, and a calculation unit. The application unit applies a first magnetic field, which is generated by applying a pulse current to a coil or applying currents with a plurality of frequencies to the coil in order, to an object. The detection unit detects a second magnetic field which is generated by applying the first magnetic field to the object. The calculation unit calculates a distribution of a magnetic field source m in the second magnetic field. The calculation unit may further generate an imaging signal for displaying the calculated distribution of the magnetic field source m, as an image. The display unit displays the image indicating the distribution of the magnetic field source m by using the imaging signal.

Abstract: A method for calibrating a magnetic source of an electromagnetic tracking system for tracking a position and orientation of an object using an inertial motion unit (IMU) mounted to the magnetic source and aligned with the coil array of magnetic source. Pitch and rolls angles of the coil array are calibrated using the IMU.

Abstract: A method of disaggregating an energy usage signal of a usage area includes steps of providing a gateway device for an aggregate energy usage signal of a usage area, installing a user application on a user computing device to display information from the gateway device, receiving a plurality of inputs, and determining the energy usage of the individual electrically powered devices in the usage area based on the aggregate energy usage signal and based on the plurality of inputs.

Abstract: Methods, apparatus, systems, and articles of manufacture are disclosed to improve computing system utilization. An example system includes a visual recognition controller to determine whether an infrared image of the device corresponds to a first utilization state of the device based on a machine-learning model, and generate a report including the first utilization state, and at least one processor to execute one or more actions to adjust operation of the device from the first utilization state to a second utilization state based on the report obtained from the visual recognition controller, the second utilization state corresponding to reduced utilization compared to the first utilization state.

Abstract: An object is to provide a relay apparatus capable of detecting a failure that occurs in the relay apparatus. A relay apparatus (10) according to the present disclosure includes a data reception unit (11) configured to receive a synchronizing packet transmitted from a master apparatus (20), the synchronizing packet containing a time value and a time correction value for correcting the time value, an update unit (12) configured to update the time correction value based on a processing time for the synchronizing packet, and a determination unit (13) configured to determine whether or not a failure has occurred in a functional block related to a process for updating the time correction value by using a result of a comparison between a corrected time value and a reference time value, the corrected time value having been corrected by using the updated time correction value.

Abstract: A solid-state heating apparatus may be incorporated into stand-alone appliances or other systems. The heating apparatus may include an impedance matching network coupled between an electrode and a radio-frequency (RF) source. The impedance matching network may be a variable impedance matching network that can be adjusted during the heating operation. The impedance matching network may include planar inductors formed from patterned conductive layers disposed either side of a substrate.

Abstract: A memory chip includes a memory region group including a plurality of memory regions. The memory chip also includes a peripheral unit configured to generate region flags of the memory regions by performing write and read operations on the respective memory regions, each of the region flags indicating whether corresponding memory region is a defective region, and to generate a group flag indicating whether the memory region group needs to be repaired, based on the region flags.

Abstract: A method for determining two-dimensional image data from at least one sectional surface of an acquisition volume as part of a magnetic resonance imaging process by a combined apparatus, including a magnetic resonance imaging facility and an X-ray facility, is provided. The method includes controlling the X-ray facility to acquire at least one X-ray image that images at least part of an object. At least one piece of object information is determined by image processing the X-ray image. At least one sectional-surface parameter that defines an arrangement of the sectional surface in the acquisition volume is determined. The magnetic resonance imaging facility is controlled to acquire measurement data relating to the sectional surface. The two-dimensional image data is calculated from the measurement data. The sectional-surface parameter is used as the basis for the control of the magnetic resonance imaging facility and/or for the calculation of the two-dimensional image data.

Abstract: A method for controlling a supply of at least one load with voltage and/or electric current through an electric network.

Abstract: A method for detecting the approach and/or contact of a user's hand close to a motor vehicle door handle. The handle including: an electrode having a capacitance, and a device for measuring the variation in capacitance, a low-frequency antenna situated close to the electrode, the emissions of the low-frequency antenna bringing about disturbances in the operation of the device for measuring the variation in the capacitance. The method proposes that a new adaptive approach detection threshold be calculated, depending on an average of the previous measured variations in the capacitance, calculated over a predetermined time interval, the measured variations being weighted by a factor depending on a difference between each measured variation and the average of the variations calculated previously over a previous predetermined time interval, the approach detection being confirmed if the measured variation is higher than the new adaptive threshold.

Abstract: The present disclosure discloses a hybrid Power over Ethernet/Device Level Ring network in which power is delivered to connected devices on the same cable in which data are delivered, and the devices are configured to connect to the network in a daisy-chain fashion. The network of the disclosure may be configured to operate as a token ring. According to a further aspect of the present disclosure, a hybrid PoE/DLR network switch and a hybrid PoE/DLR network device for such a PoE/DLR hybrid network are disclosed.

Abstract: Electron Energy Loss Spectrometer including a correction circuit for fundamental and third harmonic line noise is described. Various circuits for creating the correction signals are also described. A method of correcting for fundamental and third harmonic line noise is also described.

Abstract: A method and system to monitor electrical devices. A failed first component electric demand profile based on a set of observed measured electric power consumption datasets associated with a failure of a first component of an electrical device is received. At least one characteristic specification of electric power consumption for the electrical device is determined. The electrical device includes a number of components. An operational measurement corresponding to a corresponding characteristic specification within the at least one characteristic specification for the electrical device over a time duration is received. The operational measurement is compared to the corresponding characteristic specification for the electrical device, the comparing including determining an operational condition indicating an upcoming failure of the first component. Based on the comparing, an operational condition from within a plurality of operating conditions of the electrical device is identified and indicated.

Abstract: Systems and methods are disclosed for determining a current machine state of a processing device, predicting a future processing task to be performed by the processing device at a future time, and predicting a list of intervening processing tasks to be performed by a first time (e.g. a current time) and the start of the future processing task. The future processing task has an associated initial state. A feed-forward thermal prediction model determines a predicted future machine state at the time for starting the future processing task. Heat mitigation processes can be applied in advance of the starting of the future processing task, to meet the future initial machine state for starting the future processing task.

Abstract: A lawn mowing robot for performing self-driving is provided. The lawn mowing robot includes a body forming an appearance of the lawn mowing robot, a driving wheel configured to move the body, a sensor configured to sense information associated with a posture of the lawn mowing robot, and a controller configured to perform a calibration of the sensor to control the driving wheel to move the body in a predetermined pattern in an operating area of the lawn mowing robot, for setting a parameter associated with the sensor.

Abstract: To detect air in a fluid delivery line of an infusion system, infusion fluid is pumped through a fluid delivery line adjacent to at least one sensor. A signal is transmitted and received using the at least one sensor into and from the fluid delivery line. The at least one sensor is operated, using at least one processor, at a modified frequency which is different than a resonant frequency of the at least one sensor to reduce an amplitude of an output of the signal transmitted from the at least one sensor to a level which is lower than a saturation level of the analog-to-digital converter to avoid over-saturating the analog-to-digital converter. The signal received by the at least one sensor is converted from analog to digital using an analog-to-digital converter. The at least one processor determines whether air is in the fluid delivery line based on the converted digital signal.

Abstract: A system and method includes acquisition of a plurality of non-attenuation-corrected volumes, each of the non-attenuation-corrected volumes based on a respective one of a plurality of sets of two-dimensional emission data, acquisition of a plurality of attenuation coefficient maps, each of the plurality of attenuation coefficient maps corresponding to a respective one of the plurality of sets of two-dimensional emission data, training of a convolutional network to generate a generated attenuation coefficient map from an input image volume, the training based on the plurality of non-attenuation-corrected volumes and respective ones of the plurality of attenuation coefficient maps, and output of trained kernels of the trained convolutional network to an emission imaging system.

Abstract: Described are techniques for determining occurrence of an error within a system of related devices. If the device affected by the error is not known, other devices within the system may be used to determine whether a device is unresponsive, non-functional, or limited in functionality. The other devices may also be used to determine data indicative of characteristics of the error, such as statuses and activities of devices at or near the time of the error, which may be used to generate a query. The query may be used to determine possible control actions that may address the error or prevent subsequent errors.