Abstract: Examples of the present disclosure relate to climate control systems and air handler units with improved leak detection, along with method for installing these systems. In some examples, the climate control system comprises a heat exchanger configured to exchange thermal energy between a conditioned airflow and a refrigerant fluid; a drain pan arranged to collect condensate produced at the heat exchanger, the drain pan including one or more drains configured to route condensate out of the drain pan; a refrigerant leak sensor coupled to the drain pan and positioned above the one or more drains and configured to detect a refrigerant leak; and control circuitry operably coupled to the refrigerant leak sensor, the control circuitry configured to: receive a signal from the refrigerant leak sensor indicative of refrigerant located outside the closed circuit associated with the heat exchanger, and determine a refrigerant leak has occurred based on the signal.

Abstract: Disclosed herein are intravascular artificial pancreas devices and methods for their manufacture.

Abstract: A device and method for estimating a resistance of a wheel of a bicycle is disclosed. The device includes a mounting bracket, a disk, and a resistance adjustment knob. The mounting bracket is coupled to the bicycle. The disk is configured to indicate the resistance. The disk is located within the mounting bracket. The resistance adjustment knob is connected to the disk via a connector. Upon rotation of the knob, the connector rotates the disk for estimating the resistance of the wheel of the bicycle. The determined estimated resistance is visible on the disk.

Abstract: A method is provided for controlling a heating, ventilation, and air conditioning (HVAC) system. The method includes measuring a temperature and controlling a compressor of the HVAC system. The temperature is measured by a temperature sensor located between a metering device of the HVAC system and an evaporator coil of the HVAC system. The temperature is representative of a refrigerant temperature. The refrigerant temperature is a temperature of a refrigerant fluid flowing from the metering device to the evaporator coil. The compressor is controlled by control circuitry that is configured to perform the controlling in a dehumidify mode based, at least in part, on a value of a humidity parameter of air of an airflow through an evaporator coil and a reheat coil, where the value is determined using the temperature.

Abstract: Examples of the present disclosure relate to climate control systems and air handler units with improved leak detection, along with method for installing these systems. In some examples, the climate control system comprises a heat exchanger configured to exchange thermal energy between a conditioned airflow and a refrigerant fluid; a drain pan arranged to collect condensate produced at the heat exchanger, the drain pan including one or more drains configured to route condensate out of the drain pan; a refrigerant leak sensor coupled to the drain pan and positioned above the one or more drains and configured to detect a refrigerant leak; and control circuitry operably coupled to the refrigerant leak sensor, the control circuitry configured to: receive a signal from the refrigerant leak sensor indicative of refrigerant located outside the closed circuit associated with the heat exchanger, and determine a refrigerant leak has occurred based on the signal.

Abstract: A device and method for estimating a resistance of a wheel of a bicycle is disclosed. The device includes a mounting bracket, a disk, and a resistance adjustment knob. The mounting bracket is coupled to the bicycle. The disk is configured to indicate the resistance. The disk is located within the mounting bracket. The resistance adjustment knob is connected to the disk via a connector. Upon rotation of the knob, the connector rotates the disk for estimating the resistance of the wheel of the bicycle. The determined estimated resistance is visible on the disk.

Abstract: A multi-slab microchannel heat exchanger is disclosed. The heat exchanger includes a first slab having a first inlet header and a first outlet header, a second slab including a second inlet header and a second outlet header, a first inlet connector fluidly connected to the first inlet header, a first outlet connector fluidly connected to the first outlet header, a second inlet connector fluidly connected to the second inlet header, and a second outlet connector fluidly connected to the second outlet header. The first slab and the second slab are arranged successively in a direction along a length of the heat exchanger. The first inlet connector, the first outlet connector, the second inlet connector, and the second outlet connector are disposed at a same end of the heat exchanger.

Abstract: A multi-slab microchannel heat exchanger is disclosed. The heat exchanger includes a first slab having a first inlet header and a first outlet header, a second slab including a second inlet header and a second outlet header, a first inlet connector fluidly connected to the first inlet header, a first outlet connector fluidly connected to the first outlet header, a second inlet connector fluidly connected to the second inlet header, and a second outlet connector fluidly connected to the second outlet header. The first slab and the second slab are arranged successively in a direction along a length of the heat exchanger. The first inlet connector, the first outlet connector, the second inlet connector, and the second outlet connector are disposed at a same end of the heat exchanger.

Abstract: To address the need for scaffold-based oxygen concentration monitoring, a single-component, self-referenced oxygen sensor was made into nanofibers. Electrospinning process parameters were tuned to produce a biomaterial scaffold with specific morphological features. The ratio of an oxygen sensitive phosphorescence signal to an oxygen insensitive fluorescence signal was calculated at each image pixel to determine an oxygenation value. A single component boron dye-polymer conjugate was chosen for additional investigation due to improved resistance to degradation in aqueous media compared to a dye polymer blend. Standardization curves show that in fully supplemented media, the fibers are responsive to dissolved oxygen concentrations less than 15 parts per million. Spatial and temporal ratiometric gradients were observed in vitro radiating outward from the center of a dense adherent cell grouping. Sensor activation in ischemia and cell transplant models in vivo show oxygenation decreases on the scale of minutes.

Abstract: To address the need for scaffold-based oxygen concentration monitoring, a single-component, self-referenced oxygen sensor was made into nanofibers. Electrospinning process parameters were tuned to produce a biomaterial scaffold with specific morphological features. The ratio of an oxygen sensitive phosphorescence signal to an oxygen insensitive fluorescence signal was calculated at each image pixel to determine an oxygenation value. A single component boron dye-polymer conjugate was chosen for additional investigation due to improved resistance to degradation in aqueous media compared to a dye polymer blend. Standardization curves show that in fully supplemented media, the fibers are responsive to dissolved oxygen concentrations less than 15 parts per million. Spatial and temporal ratiometric gradients were observed in vitro radiating outward from the center of a dense adherent cell grouping. Sensor activation in ischemia and cell transplant models in vivo show oxygenation decreases on the scale of minutes.

Abstract: A system for computer-based testing includes a test driver that delivers the test to an examinee using a display device and controls progression of the test, a template module that stores presentation format information comprising the presentation format of the test, the presentation format information being accessible to the test driver, and a data module that stores data content information comprising the data content of the test, the data content information being accessible to the test driver, the presentation format information combining with the data content information to create the presentation format and the data content of the test.

Abstract: A system for computer-based testing for producing a test and delivering the test to an examinee includes a storage device that has a first storage location, which stores a first segment of a test definition language, and a second storage location, which stores a second segment of the test definition language, a validation expansion module that validates the first segment and the second segment of the test definition language, a test packager that amalgamates the first storage location and the second storage location and transmits the amalgamated segment to the validation expansion module such that the validation expansion module can determine whether the amalgamated segment forms a complete and valid set, and a test driver that has an executable code that controls functionality that enables the test driver to deliver the test to an examinee.

Abstract: A system for computer-based testing includes a test driver that delivers the test to an examinee using a display device and controls progression of the test, a template module that stores presentation format information comprising the presentation format of the test, the presentation format information being accessible to the test driver, and a data module that stores data content information comprising the data content of the test, the data content information being accessible to the test driver, the presentation format information combining with the data content information to create the presentation format and the data content of the test.

Abstract: A memory stores a plurality of first data structures, which includes element specific data objects indicating a classification of at least one of the plurality of segments of the test definition language, and second data structures, which include attribute specific data objects indicating at least one attribute of the segments of the test definition language implemented by a computer. A method for computer-based testing includes authoring a test specification and content of the at least one test using a test definition language, compiling the test specification and content of the at least one test to create a compiled test specification and content, which includes validating the test specification and content, storing the compiled test specification and content to a resource file, and retrieving the compiled test specification and content from the resource file during delivery of the test.

Abstract: A memory stores a plurality of first data structures, which includes element specific data objects indicating a classification of at least one of the plurality of segments of the test definition language, and second data structures, which include attribute specific data objects indicating at least one attribute of the segments of the test definition language implemented by a computer. A method for computer-based testing includes authoring a test specification and content of the at least one test using a test definition language, compiling the test specification and content of the at least one test to create a compiled test specification and content, which includes validating the test specification and content, storing the compiled test specification and content to a resource file, and retrieving the compiled test specification and content from the resource file during delivery of the test.

Abstract: A memory stores a plurality of first data structures, which includes element specific data objects indicating a classification of at least one of the plurality of segments of the test definition language, and second data structures, which include attribute specific data objects indicating at least one attribute of the segments of the test definition language implemented by a computer. A method for computer-based testing includes authoring a test specification and content of the at least one test using a test definition language, compiling the test specification and content of the at least one test to create a compiled test specification and content, which includes validating the test specification and content, storing the compiled test specification and content to a resource file, and retrieving the compiled test specification and content from the resource file during delivery of the test.

Abstract: A memory stores a plurality of first data structures, which includes element specific data objects indicating a classification of at least one of the plurality of segments of the test definition language, and second data structures, which include attribute specific data objects indicating at least one attribute of the segments of the test definition language implemented by a computer. A method for computer-based testing includes authoring a test specification and content of the at least one test using a test definition language, compiling the test specification and content of the at least one test to create a compiled test specification and content, which includes validating the test specification and content, storing the compiled test specification and content to a resource file, and retrieving the compiled test specification and content from the resource file during delivery of the test.

Abstract: A system for computer-based testing for producing a test and delivering the test to an examinee includes a test driver that has an executable code that controls the test driver, a storage device that has a plurality of storage locations, which store the test definition language as a plurality of segments, and a validation expansion module that validates at least one of the plurality of segments of the test definition language and writes the at least one of the plurality of segments directly to at least one of the plurality of storage locations in the storage device. A method instantiating a validation expansion module during a test production cycle and loading at least one of the plurality of segments of the test definition language into the validation expansion module from a source file.

Abstract: A method for adapting a game of bingo to a lottery, includes predetermining a plurality of bingo faces to achieve a desired liability profile. One or more of the plurality of bingo faces are distributed. Random call numbers are generated until a desired pattern is achieved on one or more of the distributed bingo faces.

Abstract: A method and/or system for computer-based testing includes, for example, instantiating an expansion module, and providing to the expansion module a resource storage element within a resource file. The method and/or system also includes, for example loading information from the resource storage element into the expansion module during delivery of the test, and providing the information from the expansion module to the test driver during the delivery of the test. Various alternative embodiments are also disclosed.