Results 251 to 260 of about 1,304,598 (304)

Pore Level Displacement Mechanisms During Foam Flooding

Canadian International Petroleum Conference, 2003
Abstract The foam-drive process has been considered in the oil and gas industry as an enhanced oil recovery method. However, practical application of this process is rather restricted. The main limitation of foam field application is the complexity of its flow behavior in porous media.
L. Romero-Zeron, A. Kantzas
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Electrodynamic Displacement of Atomic Energy Levels. I. Hyperfine Structure

Physical Review, 1952
The vacuum fluctuations of the photon and pair fields modify the interaction of an electron with an electromagnetic field. The effects on the energy levels are conveniently described in terms of the mass operator and the vacuum polarization potential.
Karplus, Robert, Klein, Abraham
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Electrodynamic Displacement of Atomic Energy Levels. II. Lamb Shift

Physical Review, 1952
The vacuum fluctuations of the photon and pair fields modify the interaction of an electron with an electromagnetic field. The effects on the energy levels are conveniently described in terms of the mass operator and the vacuum polarization potential. An operator calculus for handling the mass operator is used to separate the contribution of low energy
Karplus, Robert, Klein, Abraham, Schwinger, Julian   +2 more
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A displacement spindle in a micro/nano level

Measurement Science and Technology, 2007
This paper presents two micro/nano level displacement sensors, which consist of a mini LDGI (linear diffraction grating interferometer) and a focus probe. These two sensors are integrated into the spindle system of a micro/nano-CMM. This micro/nano spindle system is fixed on a rectangular granite bridge to achieve the z-axis function. The motion of the
Fan, K. C., Lai, Z. F., Wu, P. C., Chen, Y. C., Chen, Y. J., Jager, G.   +5 more
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Differential thermal level-displacement transducer

Measurement Techniques, 1961
The inertia of the above transducer is smaller than that of a recorder. The construction of the transducer is simple, its size is small, it has no power reaction between the moving and stationary parts, and it is possible to connect the transducer directly to the recorder.
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Two‐level preconditioning of pure displacement non‐conforming FEM systems

Numerical Linear Algebra with Applications, 1999
The authors study numerically almost incompressible materials by using a plane linear elasticity problem with Dirichlet boundary conditions. To avoid the locking effect appearing if low-order conforming finite elements (FE) are used and Poisson ratio \(\nu \) tends to 0.5, the authors approximate the problem by means of Crouzeix-Raviart linear non ...
Kolev, Tzanio V., Margenov, Svetozar D.
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Landslide hazard levels analysis considering displacement traction

Journal of Global Positioning Systems
Accurately assessing the hazards posed by landslides is of great importance for disaster prevention and mitigation. This study proposes a method of landslide hazard levels analysis based on displacement traction, a term referring to the correlated directional influence between surface displacement vectors at GNSS (Global Navigation Satellite System ...
Xingchi Chen, Yuzhi Meng, Junzhe Zhou, Yutao Zhou, Zhengdong Leng, Kun Wang   +5 more
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Displacement Due to Violence in Colombia: A Household‐Level Analysis

Economic Development and Cultural Change, 2007
Abstract Civil wars and ethnic conflicts have resulted in an estimated number of approximately 35 million refugees and internally displaced persons worldwide. Understanding the determinants of forced migration is an important prerequisite for the definition of appropriate policies of prevention, assistance, and relocation.
Engel, Stefanie, Ibanez, Ana Maria
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Presence, Displacement, and Level

2016
Detectors of presence indicate position of an object at a selected position or within a predefined system of coordinates. By definition, the presence detector is a static, time invariant device.
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Shore-level displacement in Fennoscandia calculated from empirical data

GFF, 2005
Abstract Shore-level displacement and glacio-isostatic uplift in the area affected by the Scandinavian ice is calculated from empirical data. Besides 79 shore-level curves from Scandinavia the calculations are also based on some detailed lake-tilting investigations and information concerning present relative uplift recorded by precision levelling and ...
Tore Påsse, Leif Andersson
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