Water loss in Water Distribution Systems (WDS) is now an issue of growing importance and greater efforts are being made to ensure the sustainability of these public services. In recent years the concept of Fixed Area and Variable Area Discharges (FAVAD) is the basis for several models developed to support the management and control of water losses. However, in many different real-world situatio...

In contrast to the well-known destabilization of globular proteins by high pressure, recent work has shown that pressure stabilizes the formation of isolated α-helices. However, all simulations to date have obtained a qualitatively opposite result within the experimental pressure range. We show that using a protein force field (Amber03w) parametrized in conjunction with an accurate water model ...

The long-term regulation of arterial pressure requires the maintenance of a balance between sodium and water intake and sodium and water excretion. Normal salt and water balance leads to stable body fluid volumes and the maintenance of normal renal function is critical to establishing extracellular fluid volume homeostasis. This review focuses on the role of the kidney in the long-term control ...

OBJECTIVES/HYPOTHESIS This study evaluated the effects of three levels of bolus consistency (water, thick liquid, and paste) on the nature and duration of physiologic pressure while swallowing in healthy adults using high-resolution manometry (HRM). STUDY DESIGN A case series of healthy adults. METHODS Thirty-four healthy young adults (mean age: 24.29 years) were instructed to swallow 3 mL ...

OBJECTIVE To evaluate the effect of effortful swallow on pharyngeal manometric pressure measurements during saliva and water swallowing. DESIGN Comparative analysis of pharyngeal pressure generation under 2 bolus and 2 task conditions. SETTING Swallowing rehabilitation research laboratory. PARTICIPANTS Healthy participants (N=40), sex equally represented, with a mean age of 25.8 years. ...

Leaf water potentials were estimated from the sum of the balancing pressure measured with a pressure chamber and the osmotic potential of the xylem sap in leafy shoots or leaves. When leaf water potentials in yew, rhododendron, and sunflower were compared with those measured with a thermocouple psychrometer known to indicate accurate values of leaf water potential, determinations were within +/...

Vegetative propagule pressure may affect the establishment and structure of aquatic plant communities that are commonly dominated by plants capable of clonal growth. We experimentally constructed aquatic communities consisting of four submerged macrophytes (Hydrilla verticillata, Ceratophyllum demersum, Elodea nuttallii and Myriophyllum spicatum) with three levels of vegetative propagule pressu...

This paper presents a theoretical model and a numerical simulation of a liquid-gas two-phase flow within a microchannel (50 500 2 m m cm μ μ × × ) equipped with distributed liquid water injection through the side walls. The modeling and solution of the conservation equations provide pressure drop as a function of inlet velocity. The influence of different parameters involving water injection is...

Water supply systems are massive consumers of energy, which is consumed in each of the stages of the water production and supply chain: starting from pumping the water to the water treatment plant, along the treatment process and while distributing the water via the network. Energy efficiency may be achieved by improving the pump station design, system design, installation of Variable Speed Dri...