Abstract: A blower and heat exchanger component of a heat pump, includes physically moveable interface blocks located at the corners. The blocks are relocatable to different corner locations on the unit, to allow a same blower/heat exchanger component to adapt to an existing duct being located on either side (e.g., by installing the component rotated within the installation space as appropriate). Active interface block(s) moveable to different corners afford access to power connection and/or data connections and status display features. Blank blocks occupy the corner locations left vacant by relocation of active blocks to the side of the unit serving as the front for a particular installation. The moveable corner blocks afford access to the unit for power and data connection, and status display, irrespective of orientation as installed relative to an existing ducting layout of a building.

Abstract: An electrical interface selectively places a heat pump and a backup temperature control device in alternative electrical communication with a single power feed. A compressor of the heat pump may be in selective electrical communication with the power feed via a normally open relay. Removal of a control voltage results in opening of the normal open relay, and closing of a normally closed relay to place the backup temperature control device in selective electrical communication with the power feed. For a ground source heat pump, a ground loop pump may also be in selective electrical communication with the power feed (e.g., via a normally closed relay).

Abstract: Method for in situ removal of a surface-active compound, such as per- and polyfluoroalkyl substances (PFAS), from groundwater are described. A trench is prepared that is arranged to capture groundwater flow. A diffuser is placed in the trench. The trench is backfilled with a permeable, inert solid to an elevation below ground elevation. A platform that floats on water is placed within the trench. The platform includes a perimeter support structure and one or more perforated crossbeams connected to a vacuum source. A compressed gas is provided to the diffuser within the trench to generate a foam containing the surface-active compound above the groundwater. A vacuum is applied through the one or more perforated crossbeams of the platform to collect the foam containing the surface-active compound.

Abstract: A blower and heat exchanger component of a heat pump, includes physically moveable interface blocks located at the corners. The blocks are relocatable to different corner locations on the unit, to allow a same blower/heat exchanger component to adapt to an existing duct being located on either side (e.g., by installing the component rotated within the installation space as appropriate). Active interface block(s) moveable to different corners afford access to power connection and/or data connections and status display features. Blank blocks occupy the corner locations left vacant by relocation of active blocks to the side of the unit serving as the front for a particular installation. The moveable corner blocks afford access to the unit for power and data connection, and status display, irrespective of orientation as installed relative to an existing ducting layout of a building.

Abstract: A blower and heat exchanger component of a heat pump includes a physically moveable service panel. The service panel can slide out on a first side or on a second side opposite to the first side, where an existing air duct connects to a third side that is orthogonal to the first and second sides. This sliding service panel configuration allows a same blower/heat exchanger component to adapt the duct being located on either side of the unit (e.g., by installing the component rotated by 180° within the installation space as appropriate). The service panel can slide out on both sides of the component, thereby affording access for service, irrespective of orientation of the component as installed relative to the duct.

Abstract: An electrical interface selectively places a heat pump and a backup temperature control device in alternative electrical communication with a single power feed, thereby simplifying installation and reducing cost. In particular embodiments, a compressor of the heat pump may be in selective electrical communication with the power feed via a normally closed relay. Removal of a control voltage results in opening of the normal open relay, and closing of a normally closed relay to place the backup temperature control device in selective electrical communication with the power feed. For a ground source heat pump, a ground loop pump may also be in selective electrical communication with the power feed (e.g., via a normally closed relay).

Abstract: Method of removing of per- and polyfluoroalkyl substances (PFAS) from water are described. The methods involve sparging a gas into a container of water; and collecting an aerosol released in a volume above the water.

Abstract: A plural number of training vectors are randomly selected from a total of unused training vectors, and from among the selected training vectors, a vector having the largest error amount is extracted. Subsequently, the extracted vector is added to the already used training vector so as to update the training vector, and the updated training vector is used to learn the SVM. When the largest error amount becomes smaller than a certain setting value ? or when the already used training vector becomes larger than a certain value m, learning of a first phase is stopped. In learning of a second phase, the learning is performed on a predetermined number of or all of the training vectors having a large error amount.

Abstract: To provide a method capable of reducing support vectors without decreasing the performance of an SVM. The method includes: a step of learning an SVM by using a set of training samples for initial learning which have known labels; a step of evaluating a training sample for initial learning corresponding to an outlier (value greater than 0 and equal to or less than C) based on a parameter a value obtained by learning the SVM; and a step of removing the training sample for initial learning corresponding to the outlier from a set of the original training samples for initial learning.

Abstract: A re-learning method includes: a step of learning an SVM by using a set of training samples for initial learning which have known labels; a step of perturbation-processing the training samples for initial learning; a step of using the perturbation-processed sample as a training sample for addition; and a step of re-learning the learned SVM by using the training sample for initial learning and the training sample for addition. For the training samples for initial learning to be perturbation-processed, a training sample obtained by removing a training sample for initial learning corresponding to a non-support vector, a training sample corresponding to a support vector existing on a soft margin hyperplane, etc., may be used.