Liquid-liquid phase flow in pipes merits further investigation as a challenging issue that has very rich physics and is faced everyday applications. It the main problem fluid mechanism oil gas industry. The pressure gradient of liquid pattern are still topics numerous research projects. In this paper, emphasis on to pattern, water holdup (HW), decrease for vertical, horizontal, inclined directi...

Seismicity delineating the mid-ocean ridge system in Panama Basin is mostly concentrated along transform offsets. Most intraplate areas show little-to-no seismic activity. Here we analyze passive recordings from a short-term deployment of 75 ocean-bottom seismographs (OBS) at Costa Rica Rift (CRR) and across its southern flank flowline to Ocean Drilling Program (ODP) Hole 504B. The OBS array re...

Introduction Offshore oil and gas (O & G) infrastructure provides hard substrata of structural complexity in marine environments has been shown to have ecological value, particularly oligotrophic environments. As approaches end life, understanding such values is critical inform decommissioning decisions. Methods This study uses a decade industry remotely operated vehicle (ROV) imagery d...

The proposed hybrid stage shop scheduling (HSSS) model, inspired from a real case in the high-fashion industry, aims to fully exploit the potential of parallel resources, splitting and overlapping concurrent operations among teams of multifunctional machines and operators on the same job. The HSSS formally extends mixed shop scheduling (a combination of flowshop and open shop), which is able to...

A model for the groundwater transport of naturally occurring U, Th, Ra, and Rn nuclides in the U and Th decay series is discussed. The model developed here takes into account transport by advection and the physico-chemical processes of weathering, decay, -recoil, and sorption at the water-rock interface. It describes the evolution along a flowline of the activities of the U and Th decay series ...

The increasingly widespread availability of spatial data through formal infrastructures (governmental SDI, national clearinghouses, geoportals) and less formal sources (corporate intranets, websites …) has heightened awareness of the importance of and possibilities in spatial data mining. Successful spatial data mining requires highly functional visualisation tools for representation and analys...

This study investigates new methods to improve deepwater monitoring and addresses installation of advanced sensors on ”already deployed” risers, flowlines, trees, and other deepwater devices. A major shortcoming of post installed monitoring systems in subsea is poor coupling between the sensor and structure. This study provided methods to overcome this problem. Both field testing in subsea envi...

Altimetry is probably one of the most powerful tools for the observation of ice sheets. The topography is one of the pertinent parameters related to the processes acting on ice sheets. Because it is a free surface, it description strongly helps in ice modelling. From the global scale to the km-scale, the topography hides the signature of the physical processes as well as the one of external for...

Digital elevation models (DEMs) produced from photogrammetric data sources have long relied on the use of ground control points to give them scale and orientation. However, in areas such as coastlines, landslides, or glaciers, where identification of suitable natural features and pre-marking is difficult, the use of conventional ground control may be unfeasible. This paper reports on research t...

We present new in terpretations of deglaciation i n M cM urdo Sound and the western Ross Sea, with observationally based reconstruct ions of interactions between East and West Antarct i c ice at the last glacial maximum ( LGM), 1 6 000, 1 2 000, 8000 and 4000 B P . At the LG M, East Antarct ic ice from M ulock Glacier spli t; one branch turned westward sout h of R oss Island b u t the other bra...