Abstract: A system includes a flexible datacenter and a power generation unit that generates power on an intermittent basis. The flexible datacenter is coupled to both the power generation unit and grid power through a local station. By various methods, a control system may detect a transition of the power generation unit into a stand-down mode and selectively direct grid power delivery to always-on systems in the flexible datacenter.

Abstract: A distributed power control system is provided that can include a datacenter and a remote master control system. The datacenter can include (i) computing systems, (ii) a behind-the-meter power input system configured to receive power from a behind-the-meter power source and deliver power to the computing systems, and (iii) a datacenter control system configured to control the computing systems and the behind-the-meter power input system. The remote master control system can be configured to issue instructions to the datacenter that affect an amount of behind-the-meter power consumed by the datacenter. The datacenter control system can receive, from a local station control system configured to at least partially control the behind-the-meter power source, a directive for the datacenter to ramp-down power consumption, and in response to receiving the directive, cause the computing systems to perform a set of predetermined operations correlated with the directive.

Abstract: A system includes a flexible datacenter and an energy storage unit that receives and stores power from one or more grid-scale power generation units. The energy storage unit and the flexible datacenter are connected behind-the-meter to the power generation unit(s) such that they are not typically subject to grid transmission and distribution fees. By various methods, behind-the-meter power is routed between the power generation unit(s), the energy storage unit, the flexible datacenter, and/or the grid based on a variety of conditions and operational directives.

Abstract: Described herein are pumps that linearly reciprocate to assist with circulating blood within the body of a patient. Red blood cell damage may be avoided or minimized by such linear pump movement. The linearly reciprocating movement may also generate a pulsatile pumping cycle that mimics the natural pumping cycle of the heart. The pumps may be configured to reside at various body locations. For example, the pumps may be situated within the right ventricle, the left ventricle, the ascending aorta, the descending aorta, the thoracic aorta, or the abdominal aorta. In some instances, the pump may be deployed within the venous circulation. In other instances, the pump may reside outside the patient.

Abstract: Described herein are devices and methods for pumping blood in a patient in need of circulatory assistance or a replacement heart. Instead of providing a temporary solution for these patients, the devices may be permanently implanted. The devices linearly reciprocate a shuttle within a housing to move blood into and out of the housing, and rotate the shuttle to selectively direct the movement of blood into and out of a plurality of ports in the housing.

Abstract: Described herein are pumps that linearly reciprocate to assist with circulating blood within the body of a patient. Red blood cell damage may be avoided or minimized by such linear pump movement. The linearly reciprocating movement may also generate a pulsatile pumping cycle that mimics the natural pumping cycle of the heart. The pumps may be configured to reside at various body locations. For example, the pumps may be situated within the right ventricle, the left ventricle, the ascending aorta, the descending aorta, the thoracic aorta, or the abdominal aorta. In some instances, the pump may be deployed within the venous circulation. In other instances, the pump may reside outside the patient.

Abstract: Described herein are devices and methods for pumping blood in a patient in need of circulatory assistance or a replacement heart. Instead of providing a temporary solution for these patients, the devices may be permanently implanted. The devices linearly reciprocate a shuttle within a housing to move blood into and out of the housing, and rotate the shuttle to selectively direct the movement of blood into and out of a plurality of ports in the housing.

Abstract: Described herein are pumps that linearly reciprocate to assist with circulating blood within the body of a patient. Red blood cell damage may be avoided or minimized by such linear pump movement. The linearly reciprocating movement may also generate a pulsatile pumping cycle that mimics the natural pumping cycle of the heart. The pumps may be configured to reside at various body locations. For example, the pumps may be situated within the right ventricle, the left ventricle, the ascending aorta, the descending aorta, the thoracic aorta, or the abdominal aorta. In some instances, the pump may be deployed within the venous circulation. In other instances, the pump may reside outside the patient.

Abstract: Described herein are devices and methods for pumping fluids. The devices may be implanted within a patient or located external to the body of the patient. When employed externally, the devices may be used to deliver various drugs or support hemodialysis, in addition to pumping blood and maintaining blood circulation. The implantable devices may be used in patients in need of circulatory assistance or a replacement heart. Both the implantable and external pump devices may linearly reciprocate a shuttle within a housing to simultaneously move blood into and out of the housing, and rotate the shuttle to selectively direct the movement of fluid into and out of a plurality of ports in the housing.

Abstract: An electronic system and method configured for use with an Pilates exercise equipment, such as Pilates equipment, having a surface supporting the exerciser during an exercise. The system includes a pressure sensitive matrix configured for fitting to the surface of the equipment, to measure pressures exerted by the exerciser on an area of the surface and provide electrical signals indicative of measured pressure values. A multiplexer/scanner is responsive to the electrical signals for collecting the measured pressure values. A processor responsive to the multiplexer output data signals interprets the data, resolves the data into discrete pressure values, assign a color value to each increment of pressure, and arrange the resolved data to a data format conforming to the position of each discrete pressure point on the area of the equipment. A display screen displays graphical images of the pressure values for the exerciser to view during exercise on the equipment.

Abstract: Described herein are devices and methods for pumping blood in a patient in need of circulatory assistance or a replacement heart. Instead of providing a temporary solution for these patients, the devices may be permanently implanted. The devices linearly reciprocate a shuttle within a housing to move blood into and out of the housing, and rotate the shuttle to selectively direct the movement of blood into and out of a plurality of ports in the housing.

Abstract: An integrated water treatment system for sanitizing the water in a water system and reducing scaling includes an electrolytic cell through which water is passed. An electronic control system is coupled to the electrolytic cell, to provide a drive current to the cell to generate a sanitizer by electrolysis. The control system applies a variable frequency alternating voltage drive to said cell to reduce scaling build-up in the system.

Abstract: A method and apparatus for circulating water in a bathing installation with a water circulation flow path and a tub for holding bathing water is described. A pump is submerged in a chamber in the circulation flow path so that the pump when operated provides a positive pump pressure to pump water through the circulation flow path from an inlet opening to an outlet opening. Thermal contact is provided between a pump housing surface and water in the chamber to allow heat transfer between the pump housing surface and water in the chamber.

Abstract: A control system for a bathing installation which has one or more electrically powered devices. A line voltage service is connected through a GFCI to power the electrically powered devices, the GFCI adapted to interrupt the service upon detection of a ground fault. A trip circuit may induce a ground fault and trip the GFCI in response to a trip signal, thereby disabling application of electrical power to the electrically powered devices. An electronic circuit is responsive to a fault condition for generating the trip signal.

Abstract: A dynamic mixer includes a housing structure having a mixing chamber, having an inlet opening through which a material or materials to be mixed is passed into the mixing chamber and an outlet. A mixer rod has mixing rod portion disposed in the housing structure and a plurality of mixing paddle portions each having a mixing surface. The mixing rod is adapted for attachment to a drive unit which imparts a rotational mixing force to the rod. In one exemplary non-limiting embodiment of a mixer, the housing structure includes a hollow tubular structure with first and second open ends, a hollow T fitting having a first opening attached to the first end of the hollow tubular structure, a second opening opposed to and in alignment with the first opening and a third opening transverse to the first and second openings, and a coupler fitting attached to the second open end of the tubular structure.

Abstract: A control system for a bathing installation which has one or more electrically powered devices. A line voltage service is connected through a GFCI to power the electrically powered devices, the GFCI adapted to interrupt the service upon detection of a ground fault. A trip circuit may induce a ground fault and trip the GFCI in response to a trip signal, thereby disabling application of electrical power to the electrically powered devices. An electronic circuit is responsive to a fault condition for generating the trip signal.

Abstract: A control system for a bathing installation which has one or more electrically powered devices. A line voltage service is connected through a GFCI to power the electrically powered devices, the GFCI adapted to interrupt the service upon detection of a ground fault. A trip circuit may induce a ground fault and trip the GFCI in response to a trip signal, thereby disabling application of electrical power to the electrically powered devices. An electronic circuit is responsive to a fault condition for generating the trip signal.

Abstract: A control system for a bathing installation which has one or more electrically powered devices. A line voltage service is connected through a GFCI to power the electrically powered devices, the GFCI adapted to interrupt the service upon detection of a ground fault. A trip circuit may induce a ground fault and trip the GFCI in response to a trip signal, thereby disabling application of electrical power to the electrically powered devices. An electronic circuit is responsive to a fault condition for generating the trip signal.

Abstract: A method and apparatus for circulating water in a bathing installation with a water circulation flow path and a tub for holding bathing water is described. A pump is submerged in a chamber in the circulation flow path so that the pump when operated provides a positive pump pressure to pump water through the circulation flow path from an inlet opening to an outlet opening. Thermal contact is provided between a pump housing surface and water in the chamber to allow heat transfer between the pump housing surface and water in the chamber.

Abstract: A control system for a bathing installation which has one or more electrically powered devices. A line voltage service is connected through a GFCI to power the electrically powered devices, the GFCI adapted to interrupt the service upon detection of a ground fault. A trip circuit may induce a ground fault and trip the GFCI in response to a trip signal, thereby disabling application of electrical power to the electrically powered devices. An electronic circuit is responsive to a fault condition for generating the trip signal.