An experimental testing program was conducted to quantify leakage through a geomembrane liner system when subjected to high hydraulic heads. Leakage through geomembranes is mainly due to the presence of defects, which may occur during installation and operation. Previous studies focused on leakage through landfill liners (i.e., low hydraulic heads) have led to analytical models and simplified e...

Subsurface environment sensing and monitoring applications such as detection of water intrusion or a landslide, which could significantly change the physical properties of the host soil, can be accomplished using a novel concept, Wireless Signal Networks (WSiNs). The wireless signal networks take advantage of the variations of radio signal strength on the distributed underground sensor nodes of...

Based on the assumption of a uniform property annular-shaped region at the labyrinth entrance, this paper proposes a method for leakage flow rate prediction at the discharge end-face of twin-screw compressors. Assumption of such a region is the key aspect in the construction of an equivalent network of end-face leakage flows, in which the labyrinth entrance zone is a node. Using mass and energy...

This study was performed to compare the amount of air leakage into the thoracic cavity associated with three thoracostomy tube materials (silicone, polyvinyl chloride, red rubber) in canine cadavers. Differences in intrapleural pressures (IPPs) measured before and after tube placement and before and after tube removal were calculated. The duration of air leakage around the tubes was assessed by...

Tswana is traditionally described as having a process of post-nasal stop devoicing (/mba/ → [mpa]). If this description is accurate, then Tswana poses a challenge to views that neutralization processes should be articulatorily grounded. Airflow leakage through the nasal cavity should promote, not inhibit, voicing post-nasally. Zsiga et al. [1] performed an acoustic study of the speech of 6 Tswa...

Submitted for the MAR14 Meeting of The American Physical Society Single-qubit gates in frequency-crowded transmon systems FRANK WILHELM, DANIEL J. EGGER, Saarland University, RON SCHUTJENS, Saarland University and Delft University of Technology, FADI ABU DAGGA, Saarland University — Superconducting transmon qubits in threedimensional cavities show coherence longer by an order of magnitude compa...

Green Security is a new research field aimed at defining and investigating security solutions under an energy-aware perspective. The aim of Green Security is twofold: 1) evaluating the actual security mechanisms both considering the energy costs and the effectiveness; 2) building new security mechanisms by considering energy efficiency from the design phase. In this paper, we first provide a de...

Focusing on the tip leakage vortex cavitation, experimental and numerical studies were carried out as the first step of the investigation of cavitations in tip leakage flow. For a single hydrofoil with a tip clearance, tip leakage vortex cavitations were observed for various cavitation numbers and angles of attack. To simulate the tip leakage vortex cavitation, a simple calculation of 2-D unste...

Composite liners with a geomembrane and either a compacted clay or a geosynthetic clay liner are widely used to minimize leakage from landfills and other containment systems such as leachate lagoons. While much work has been done to quantify the rates of leakage, few papers assess the impact of this leakage on groundwater quality. This is particularly important for organic contaminants because ...

This paper presents the experimental results of comparison between leakage currents and discharge currents. The leakage currents were obtained on polluted porcelain insulator. Whereas, the discharge currents were obtained on lightly artificial polluted porcelain specimen. The conducted measurements were leakage current or discharge current and applied voltage. The insulator or specimen was in a...