Abstract: Disclosed are a perovskite solar cell and a fabrication method thereof. The perovskite solar cell includes an electron transport layer, a perovskite layer, and a hole transport layer, where the hole transport layer includes an inorganic substance serving as a hole transport material, and an organic layer including a carbazole derivative is formed on the hole transport layer. A combination of a carbazole derivative and an inorganic material serving as a hole transport layer can allow the preparation of a perovskite solar cell with a high conversion efficiency.

Abstract: A low-voltage high-speed programmable equalization circuit includes a gain boosting amplifier stage, a CML differential amplifier stage, and an emitter follower. An input terminal of the gain boosting amplifier stage serves as an input terminal of the equalization circuit. An output terminal of the gain boosting amplifier stage is connected to an input terminal of the CML differential amplifier stage. An output terminal of the CML differential amplifier stage is connected to an input terminal of the emitter follower. An output terminal of the emitter follower serves as an output terminal of the equalization circuit.

Abstract: A balancing circuit which may compensate for bandwidth attenuation introduced by interference between signals includes an amplifying circuit, a rising edge detection circuit and/or a falling edge detection circuit. By means of detecting the rising/falling edge of an original signal, the resulting pulse signal contains the phase information of a single “0” bit and a single “1” bit in the original signal, thus the phase of a rising edge or the phase of a falling edge of the original signal may be compensated respectively, so as to compensate for the high-frequency attenuation caused by interference between signals.

Abstract: A low-voltage high-speed programmable equalization circuit includes a gain boosting amplifier stage, a CML differential amplifier stage, and an emitter follower. An input terminal of the gain boosting amplifier stage serves as an input terminal of the equalization circuit. An output terminal of the gain boosting amplifier stage is connected to an input terminal of the CML differential amplifier stage. An output terminal of the CIVIL differential amplifier stage is connected to an input terminal of the emitter follower. An output terminal of the emitter follower serves as an output terminal of the equalization circuit.

Abstract: A balancing circuit which may compensate for bandwidth attenuation introduced by interference between signals includes an amplifying circuit, a rising edge detection circuit and/or a falling edge detection circuit. By means of detecting the rising/falling edge of an original signal, the resulting pulse signal contains the phase information of a single “0” bit and a single “1” bit in the original signal, thus the phase of a rising edge or the phase of a falling edge of the original signal may be compensated respectively, so as to compensate for the high-frequency attenuation caused by interference between signals.

Abstract: A method and a non-transitory computer readable medium for generating polygons within a geographic region that satisfy a query are disclosed. For example, the method extracts a plurality of nodes, a plurality of service providers and information associated with the plurality of nodes and the plurality of service providers of the geographic region from a geographic data source, creates a node table based on the information that was extracted, receives the query for one or more nodes having a predefined number of service providers within a travel budget, determines the one or more nodes from the node table that satisfy the query, and generates one or more generate polygons around the one or more nodes that satisfy the query within the geographic region.

Abstract: A method and a non-transitory computer readable medium for generating polygons within a geographic region that satisfy a query are disclosed. For example, the method extracts a plurality of nodes, a plurality of service providers and information associated with the plurality of nodes and the plurality of service providers of the geographic region from a geographic data source, creates a node table based on the information that was extracted, receives the query for one or more nodes having a predefined number of service providers within a travel budget, determines the one or more nodes from the node table that satisfy the query, and generates one or more generate polygons around the one or more nodes that satisfy the query within the geographic region.

Abstract: A fluid level sensor is configured for identifying a fluid level in a small volume reservoir, such as a fluid reservoir in an ejector head. The reservoir includes a plurality of vertically arranged chambers. A plurality of piezoelectric transducers is distributed over the chambers in a one-to-one correspondence. At least one electrical conductor is electrically connected to each piezoelectric transducer in the plurality of piezoelectric transducers to enable each piezoelectric sensor to receive an electrical signal to a portion of a wall of the chamber to produce an acoustical wave in the chamber and to transmit an electrical signal from each piezoelectric transducer in response to a fluctuating pressure on each piezoelectric transducer produced by the acoustical wave in the chamber.

Abstract: A computer system configured to improve health outcomes and reduce medical service costs includes a memory storing a computer program and a processor that executes the computer program. The computer program receives a medical inquiry, extracts a keyword using natural language processing (NLP), selects a category of concern indicated by the medical inquiry from a library using the keyword, determines leading factors contributing to the category of concern based on a statistical model analysis, selects analytic modules from a library that receive at least one of the leading factors as an input parameter or produce at least one of the leading factors as an output parameter, and generates a recommendation including a listing of the selected analytic modules and/or a constructed workflow including at least two of the selected analytic modules chained together via respective input parameters and output parameters of the at least two selected analytic modules.

Abstract: A fluid level sensor is configured for identifying a fluid level in a small volume reservoir, such as a fluid reservoir in an ejector head. The reservoir includes a plurality of vertically arranged chambers. A plurality of piezoelectric transducers is distributed over the chambers in a one-to-one correspondence. At least one electrical conductor is electrically connected to each piezoelectric transducer in the plurality of piezoelectric transducers to enable each piezoelectric sensor to receive an electrical signal to a portion of a wall of the chamber to produce an acoustical wave in the chamber and to transmit an electrical signal from each piezoelectric transducer in response to a fluctuating pressure on each piezoelectric transducer produced by the acoustical wave in the chamber.

Abstract: A fluid level sensor is configured for identifying a fluid level in a small volume reservoir, such as a fluid reservoir in an ejector head. The reservoir includes a plurality of vertically arranged chambers. A plurality of piezoelectric transducers is distributed over the chambers in a one-to-one correspondence. At least one electrical conductor is electrically connected to each piezoelectric transducer in the plurality of piezoelectric transducers to enable each piezoelectric sensor to receive an electrical signal to a portion of a wall of the chamber to produce an acoustical wave in the chamber and to transmit an electrical signal from each piezoelectric transducer in response to a fluctuating pressure on each piezoelectric transducer produced by the acoustical wave in the chamber.

Abstract: A fluid level sensor is configured for identifying a fluid level in a small volume reservoir, such as a fluid reservoir in an ejector head. The reservoir includes a plurality of vertically arranged chambers. A plurality of piezoelectric transducers is distributed over the chambers in a one-to-one correspondence. At least one electrical conductor is electrically connected to each piezoelectric transducer in the plurality of piezoelectric transducers to enable each piezoelectric sensor to receive an electrical signal to a portion of a wall of the chamber to produce an acoustical wave in the chamber and to transmit an electrical signal from each piezoelectric transducer in response to a fluctuating pressure on each piezoelectric transducer produced by the acoustical wave in the chamber.

Abstract: A fluid level sensor is configured for identifying a fluid level in a small volume reservoir, such as a fluid reservoir in an ejector head. The reservoir includes a plurality of vertically arranged chambers. A plurality of piezoelectric transducers is distributed over the chambers in a one-to-one correspondence. At least one electrical conductor is electrically connected to each piezoelectric transducer in the plurality of piezoelectric transducers to enable each piezoelectric sensor to receive an electrical signal to a portion of a wall of the chamber to produce an acoustical wave in the chamber and to transmit an electrical signal from each piezoelectric transducer in response to a fluctuating pressure on each piezoelectric transducer produced by the acoustical wave in the chamber.

Abstract: Embodiments described herein are directed to characterizing a media curler for a printing. Test curls can be imposed on media having input curls with known input values using a media curler to be characterized. The media curler can impose the test curls based on curler settings of the media curler. Resulting output values from an interaction between the test curls and the input curls can be measured and the curler settings can be characterized based on the known input values and the resulting output values so that the media curler can be configured to respond to incoming media having a known input curl by applying curler setting to achieve a desired output curl.

Abstract: A method, non-transitory computer readable medium, and apparatus for routing a call using a hybrid call routing scheme are disclosed. For example, the method receives a call for a customer agent at a call center, identifies a list of available customer agents, calculates a hybrid score for each one of the available customer agents, wherein the hybrid score is based upon a combination of a longest-idle-agent routing parameter, a performance based routing parameter and a tuning parameter, selects a customer agent from the list of the available customer agents having a highest hybrid score and routes, by the processor, the call to the customer agent that is selected.

Abstract: A method of adjusting labor capacity in a print production environment may include receiving, by a computing device, a realized demand value for a print production environment and determining that the realized demand value exceeds a total labor capacity associated with one or more workers in the print production environment. The method may include, in response to determining that the realized demand value exceeds the total labor capacity associated with the print production environment, determining one or more updated compensation rates for the one or more workers, determining one or more production parameters corresponding to each of the updated compensation rates, presenting the determined updated compensation rates and corresponding production parameters to a user, receiving a selection of an updated compensation rate from the presented compensation rates, and communicating the selected updated compensation rate to the one or more workers.

Abstract: A fixing device includes a first fixing member a second fixing member that are movable to engage and disengage a fixing nip defined by the first and second fixing member. The fixing nip is disengaged to accommodate entry and exit of a cut sheet, and engaged to accommodate warm-pressure fixing a marking material image to the cut sheet.

Abstract: Various embodiments provide materials, apparatus, and methods for forming an image. Exemplary imaging apparatus can include one or more light sources configured to treat toner images after they are transferred on an image receiving substrate (e.g., a copy sheet). The toner images can be formed of an opto-thermal toner containing opto-thermal elements in a toner composition. The fuser subsystem may or may not be configured in the disclosed imaging apparatus.

Abstract: A parking pricing with occupancy feedback control for achieving an optimal occupancy level for a parking space area, so that at least one space is available and circling is not necessary. The parking pricing with occupancy feedback control system proposes to implement a market based parking pricing from an occupancy control approach. The parking price system seeks to maintain a desired occupancy level by measuring real-time parking space occupancy and using controller to automatically adjust parking rates to change with real-time demand. Occupancy feedback control is used to adjust parking space pricing so that the occupancy level approaches a target capacity level. Parking space sensors measure the presence of the vehicles, a parking control engine compares the real-time occupancy of the parking spaces to the target occupancy of the parking spaces, and adjusts the parking pricing to regulate the demand, so that the parking space occupancy converges to its target.

Abstract: An indirect media flatness measurement system, and method, by which the appropriate level of hold-down force may be determined with some degree of quantitative accuracy. In an ink jet printer that is operative to subject a substrate media to a hold down force during printing, the method including printing a predetermined test image having a predetermined pattern on a substrate media using an ink jet print apparatus to produce a test print. Optionally, pattern may be an array of test symbols. The test symbol may include a line printed on the substrate media in a direction perpendicular to a process direction of the printer. The test print is compared with the predetermined test image, including measuring drop placement errors of test symbols. The height of the substrate media at the location of each test symbol is calculated based upon the drop placement error.