نتایج جستجو برای: walkaway vsp

تعداد نتایج: 785  

2011
Xiaoxiang Wang

Reflection tomography in the migrated domain can help reconstruct heterogeneous, anisotropic velocity fields needed for accurate depth imaging of complex geologic structures. The presence of anisotropy, however, increases the uncertainty in velocity analysis and typically requires a priori constraints on the model parameters. Here, we develop a 2D P-wave tomographic algorithm for heterogeneous ...

2011
Di Yang Michael Fehler Lianjie Huang

Geological carbon sequestration involves large-scale injection of carbon dioxide into underground geologic formations and is considered as a potential approach for mitigating global warming. Changes in reservoir properties resulting from the CO2 injection and migration can be characterized using waveform inversions of time-lapse seismic data. The conventional approach for analysis using wavefor...

2000
Colin MacBeth Enru Liu Mark Boyd Karen Sweeney

Two marine walkaway VSP lines are recorded by three-component receivers positioned in a dolomite layer. The layer has a high seismic velocity relative to the surrounding rocks and may be fractured. The recorded wavefield is analysed to determine whether this acquisition is suitable to image details of the internal structure of the layer. The principal arrivals in the wavefield are a dominant ho...

2009
Simin Huang

I predict VSP free-surface multiples and subtract them from VSP data, and then apply least squares migration (LSM) to the VSP data. The LSM image contains noticeably fewer artifacts associated with the aquisition footprints than the standard VSP image. The freesurface multiple artifact is considerably diminished in the demultipled data, and the migration image with demultiple VSP data has fewer...

Journal: :Medical principles and practice : international journal of the Kuwait University, Health Science Centre 2012
Nihar Dash Mansour Al-Zarouni Ashok Rattan Debadatta Panigrahi

OBJECTIVE To describe the misidentification of Brucella melitensis as Bergeyella zoohelcum by MicroScan WalkAway®, a commonly used bacterial identification system. CLINICAL PRESENTATION AND INTERVENTION A 35-year-old man was admitted to the Intensive Care Unit with sepsis syndrome. Three sets of aerobic blood culture samples were positive after 48 h of incubation. The isolated organism was id...

2014
Shinji Yamaguchi Naoya Aoki Takaaki Kitajima Yasushi Okamura Koichi J Homma

Voltage-sensing phosphatase (VSP) consists of a transmembrane voltage sensor domain (VSD) and the cytoplasmic domain with phosphoinositide-phosphatase activities. It operates as the voltage sensor and directly translates membrane potential into phosphoinositide turnover by coupling VSD to the cytoplasmic domain. VSPs are evolutionarily conserved from marine invertebrate up to humans. Recently, ...

2014
Sun Moon Kang Geunho Kang Pil-Nam Seong Beomyoung Park Soohyun Cho

The effects of various packaging systems, vacuum packaging (VACP), medium oxygen-modified atmosphere packaging (50% O2/20% CO2/30% N2, MOMAP), MOMAP combined with vacuum skin packaging (VSP-MOMAP), high oxygen-MAP (80% O2/20% CO2/0% N2, HOMAP), and HOMAP combined with VSP (VSP-HOMAP), on the activity of antioxidant enzyme, and oxidation and color stabilities in sliced Hanwoo (Korean cattle) bee...

Journal: :Acta neurochirurgica. Supplement 2008
Krissanee Karnchanapandh

INTRODUCTION Increased ICP is common and might precipitate cerebral vasospasm (VSP)-induced ischemic events in aneurysmal SAH (ASAH).Our objective was to determine if there is an association between increased ICP and transcranial colour coded Doppler-angiographic VSP (TCCD-A VSP) in relation to delayed neurological deficit (DND) and poor outcome. METHODS A retrospective study was undertaken i...

2000
Mark Boyd John Queen

A marine VSP is designed to estimate the orientation and density of fracturing within a gas-producing dolomite layer in the southern North Sea. The overburden anisotropy is firstly estimated by analysing shear waves converted at or just below the sea-bed, from air-gun sources at four fixed offset azimuths. Full-wave modelling helps confirm that the background has no more than 3% vertical birefr...

Journal: :Biophysical journal 2015
Mario G Rosasco Sharona E Gordon Sandra M Bajjalieh

Voltage-sensitive phosphatases (VSPs) are proteins that directly couple changes in membrane electrical potential to inositol lipid phosphatase activity. VSPs thus couple two signaling pathways that are critical for cellular functioning. Although a number of nonmammalian VSPs have been characterized biophysically, mammalian VSPs are less well understood at both the physiological and biophysical ...

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