Prototypes have been designed and manufactured for a lightweight portable device which continually moves all the joints of the hand passively through a range of motion. Inflatable bag modules in the palm of the hand are ganged together to create the required range of motion. A battery-operated air pump cycles compressed air to the modules. Initial clinical experience with patients who have flex...

A heat pump is an electrically-ponered refrigerationcycle device which is capable ofproviding both heating and cooling to a residence. In the sumrrcr, it operates like an air conditioner by "moving" heat from inside the house to the outside. In the winter, the refrigerant flow is reversed, "moving" heat into the house by further chilling the already cold outside air and transferring the heat ga...

CHEST,81: 3, MARCH,1982 pump oxygenators. Ann Thorac Surg 1980; 29:336 2 Pierce EC II. Specific therapy for arterial air embolism (edictorial). Ann Thorac Surg 1980; 29:300 3 Mills NL, Ochsner JL. Massive air embolism during cardiopulmonary bypass : cause, prevention and management. J Thorac Cardiovasc Surg 1980; 80:708 4 Coss CM. Gray’s anatomy (27th ed). Philadelphia: Lea & Febiger, 1959, Fig...

The ultrafast solvation dynamics of courmarin 314 (C314) molecules at the air/water interface has been shown to depend on their orientation with respect to the plane of the interface. A pump/second harmonic probe method using femtosecond laser pulses were used to measure the interface solvation dynamics. The pump light was S polarized, i.e., in the interface plane, or P polarized, i.e., in the ...

Surprisingly little is known about the neural mechanism of cough. Although slow and fast adapting stretch receptors in the air passages have been hypothesized to trigger cough, stimuli that activate these receptors do not induce cough. Recently, a new receptor type responsive to touch and acid—stimuli that also evoke cough—was identified in guinea pigs. Mazzone et al. have further characterized...

The type of heating, ventilation and air conditioning (HVAC) system has a large impact on the heating and cooling energy consumption in multifamily residential buildings. This paper compares the energy performance of three HVAC systems: a direct expansion (DX) split system, a split air source heat pump (ASHP) system, and a closedloop water source heat pump (WSHP) system with a boiler and an eva...

The paper presents a study of refrigerants and some issues relating to their environmental impacts in HVAC&R equipment. They are treated aspects of the environmental pollution through the working fluids of the air-conditioning, refrigeration and heat pump systems, and a new strategy in using refrigerants in accordance with the international legislation is described. Additionally, this study pre...

Sonny G. Sundaresan Copeland Corporation Sidney, Ohio, U.S.A. HCFC 22 currently used in Air-Conditioning and Heat Pump applications, is being replaced by R407C and R410A, both HFC 32 based blends. Scroll compressors are being developed to meet the improved efficiency and other system performance requirements in Air-Conditioning and Heat Pump products in North America, Europe and Asia-Pacific. L...

This study presents a double-side diaphragm peristaltic pump for efficient medium transport without the unwanted backflow and the lagging effect of a diaphragm. A theoretical model was derived to predict the important parameter of the micropump, i.e., the motion of the valves at large deformations, for a variety of air pressures. Accordingly, we proposed an easy and robust design to fabricate a...