Background: Sand production is an important factor affecting reservoir exploitation. Excessive sand production affects the oil well life, causes the damage to the oil recovery device and brings serious hidden danger in the process of safety production. Objective: This paper presents a sand content computation model for the crude oil, which uses the power of sand production and Parseval theorem,...

Phlebotomine captures were performed during 2004 in Clorinda, Argentina. Clorinda is located across the branches of the Paraguay river in front of Asunción city, Paraguay. Reports of canine and human visceral leishmaniasis in Asunción have been increasing since 1997, however neither leishmaniasis cases nor sand flies were ever recorded from Clorinda. Light traps were located in migration paths ...

A chenier is a beach ridge, consisting of sand and/or shells, overlying muddy substrate. In this paper, we explore the cross-shore dynamics cheniers in their ‘active’ phase, i.e. phase between formation and landing on shore can no longer be reached by daily wave tidal influences. While described literature are known to only migrate onshore until they reach stable position with crest level above...

Lampedusa is today best known in relation to migration. The island has confronted one migration crisis after the other for past three decades, resulting extensive media coverage. Whereas Lampedusa, a small central Mediterranean region, an economy mainly based on tourism, its name remains associated with migration, which believed negatively impact island’s image and performance of tourism sector...

The washout of fine materials from liners consisting clay–sand mixtures is expected to influence the hydraulic conductivity. Clay sand must be assessed for efficiency when initially subjected flood or standing water as wetting under a gradient can cause material move and migrate away mixture. During drying complex expansion shrinkage, changes take place. These affect conductivity are likely go ...

Saltation is an important geological process and the primary source of atmospheric mineral dust aerosols. Unfortunately, no studies to date have been able to precisely reproduce the saltation process because of the simplified theoretical models used. For example, sand particles in most of the existing wind sand movement models are considered to be spherical, the effects of the sand shape on the...

Recruitment of a specific cell population after Leishmania infection can influence the outcome of the disease. Cellular migration in response to Leishmania or vector saliva has been reported in air pouch model, however, cellular migration induced by Leishmania associated with host's blood and vector saliva in this model has not been described. Herein we investigated cellular migration into air ...

Unlike green sand, chemically bonded sand cannot be used again and again without reclamation because in this system, the mixed sand gets it`s strength through chemical reaction which is irreversible in nature. Each sand particle is coated with this reacted chemical, which behaves like an inert element after usage once. This inert coating also called “Dead” binder needs to be removed from the us...

The existence of karst compromises the safety underground engineering, especially during tunnel excavations. Karst conduits are uncovered through excavations, which may lead to a water–sand inrush disaster. Taking vertical conduit as an example, process could be viewed being similar whereby mixture flows discharge opening storage bin. In this study, based on force analysis non-aqueous sand body...

We present an interactive sand art drawing system using one RGB-D sensor, such as Kinect. Our system supports the common sand drawing functions, such as sand erosion, sand spilling, and sand leaking. To use hands to draw virtual sand on a drawing plane, we design four key gestures which enable drawing manipulation actions for sand. The basic idea is that the gesture of one hand controls the dra...