In this work, we introduce a novel boundary-conforming mesh-update method that is particularly designed for problems with large boundary displacements and topology changes. This method, which call the surface-reconstruction virtual-region mesh update integrates virtual region approach surface reconstruction process to handle complex movements. The allows having an activated deactivated part of ...

Background—Common 3D systems have only limited spatial and temporal resolution (frame rate of 25 Hz). Thin structures such as cardiac valves are not imaged exactly; rapid movement patterns cannot be precisely recorded. The objective of the present project was to achieve radiofrequency (RF) data transmission to the 3D workstation to improve image resolution. Methods and Results—A commercially av...

Valves play a critical role in a water distribution system for subsystem isolation and flow or pressure control. Among them, subsystem isolation is required to repair or to rehabilitate a broken component and can be done by closing adjacent valves. To evaluate the role of valves, the concept of “Segment” is necessary. A segment consists of a set of pipes and nodes isolated together by closing a...

BACKGROUND Common 3D systems have only limited spatial and temporal resolution (frame rate of 25 Hz). Thin structures such as cardiac valves are not imaged exactly; rapid movement patterns cannot be precisely recorded. The objective of the present project was to achieve radiofrequency (RF) data transmission to the 3D workstation to improve image resolution. METHODS AND RESULTS A commercially ...

• The aortic incisura and the second heart sound have been considered simultaneous with and caused by aortic valve closure for many years. While Wiggers believed in a noiseless approximation of the semilunar valves and that after-vibrations of the closed valves and aortic blood column caused the second sound, the incisura was related to semilunar valve closure. Thus, subsequent studies relating...

Pediatric patients account for a small portion of the heart valve replacements performed, but a pediatric pulmonary valve replacement with growth potential remains an unmet clinical need. Herein we report the first tubular heart valve made from two decellularized, engineered tissue tubes attached with absorbable sutures, which can meet this need, in principle. Engineered tissue tubes were fabri...

The movement of the anterior leaflet of the mitral valve has been recorded with an ultrasound echo technique. The intrinsic mobility of the valve cusps and the rate of ventricular filling are thought to influence the closure of the valve during diastole. Atrial contraction occurs at the end of ventricular diastole and reopens the valve before the mitral valve returns to the closed position befo...

The large primary-secondary chilled water systems often suffer from the excess flow demand and low chilled water temperature difference, which is known as the low ΔT central plant syndrome, during operation. This paper presents an approach for experimental validation of the possible utility of a check valve (i.e., putting a one-direction check valve in the chilled water by-pass line) to solve t...

The use of natural gas (NG) in dual-fuel heavy-duty engines has the potential to reduce pollutant and greenhouse (GHG) emissions from transport sector when compared conventional diesel engines. However, NG composition methane slip are interest because both can adversely affect benefits as an alternative fuel, especially considering GHG emissions. Therefore, this study experimentally investigate...

Microfluidic characterization plays an outstanding role in the development of glaucoma drainage devices. Here, we describe the optimization of an existing test facility with regard to measurement of small volumetric flow rates in the range of 1 μl/min to 40 μl/min in a minimized testing time. The existing test facility is extended by a flow sensor and validated by microfluidic characterization ...