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Journal articles on the topic 'Near well region'

Author: Grafiati

Published: 8 June 2024

Last updated: 31 July 2025

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1

Durlofsky, L. J., W. J. Milliken, and A. Bernath. "Scaleup in the Near-Well Region." SPE Journal 5, no. 01 (2000): 110–17. http://dx.doi.org/10.2118/61855-pa.

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2

Rotár-Szalkai, Á., I. Eper-Pápai, and Gy Mentes. "Well level data analysis in Hungary near a fault region." Journal of Geodynamics 41, no. 1-3 (2006): 183–89. http://dx.doi.org/10.1016/j.jog.2005.08.002.

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3

Stamatakis, E., A. Stubos, T. Bjørnstad, and J. Muller. "Calcite scale prediction at the near-well region: A radiotracer approach." EPJ Web of Conferences 50 (2013): 03004. http://dx.doi.org/10.1051/epjconf/20135003004.

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4

Dotlic, Milan, Boris Pokorni, Milenko Pusic, and Milan Dimkic. "Non-linear multi-point flux approximation in the near-well region." Filomat 32, no. 20 (2018): 6857–67. http://dx.doi.org/10.2298/fil1820857d.

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We consider non-linear multi-point flux approximations (MPFA) scheme for flow simulations in a model of anisotropic porous medium that includes wells. The hydraulic head varies logarithmically and its gradient changes rapidly in the well vicinity. Due to this strong non-linearity of the near-well flow, use of the MPFA scheme in the near well region results in a completely wrong total well flux and an inaccurate hydraulic head distribution. In this article we propose correction of the MPFA scheme. The outcome is a scheme that is second-order accurate even in the well vicinity for anisotropic me

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5

Johansen, Thormod E., and Vitaly Khoriakov. "Iterative techniques in modeling of multi-phase flow in advanced wells and the near well region." Journal of Petroleum Science and Engineering 58, no. 1-2 (2007): 49–67. http://dx.doi.org/10.1016/j.petrol.2006.11.013.

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6

Hwang, M. K. "Modeling Nonlinear Interactions Among Near-Well Flow Restrictions in Well-Deliverability Prediction and Simulation." SPE Reservoir Evaluation & Engineering 3, no. 04 (2000): 360–68. http://dx.doi.org/10.2118/65407-pa.

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Summary This work describes simulation of well productivity reduction due to near-well flow restrictions. The flow restrictions considered include: mechanical skin, partial completion, altered formation due to residual completion fluid or liquid dropout, and non-Darcy flow effects. It addresses two specific issues. The first is how to predict changes in well performance induced by changes in near-well parameters, as needed in history matching and well test analysis. A subset of this issue is how to estimate the impact of using well parameters to simplify simulation models such as partial compl

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7

Moe, Moe Yee, and Thuzar Lwin Moe. "Quality Assessment of Well Water from Natmauk Township, Magway Region." Bago University Research Journal Vol.10, No.1, no. 2020 (2020): 181–86. https://doi.org/10.5281/zenodo.3923272.

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In this research, three water samples were collected from near Ywamon Village in Natmauk Township, Magway Region to determine some physicochemical parameters {pH, temperature, total hardness, alkalinity, chlorinity, salinity, total dissolved solid (TDS), total suspended solid (TSS), dissolved oxygen (DO), biochemical oxygen demand (BOD) and chemical oxygen demand (COD)}. The toxic elements (Pb, Cd, Hg, As and Cr) in samples were determined by atomic absorption spectrophotometry (AAS). Total coliforms contained in samples were determined by multiple tubes method in National Health Laboratory (N

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8

Mott, R. E., A. S. Cable, and M. C. Spearing. "Measurements of Relative Permeabilities for Calculating Gas-Condensate Well Deliverability." SPE Reservoir Evaluation & Engineering 3, no. 06 (2000): 473–79. http://dx.doi.org/10.2118/68050-pa.

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Summary Well deliverability in many gas-condensate reservoirs is reduced by condensate banking when the bottomhole pressure falls below the dewpoint, although the impact of condensate banking may be reduced due to improved mobility at high capillary number in the near-well region. This paper presents the results of relative permeability measurements on a sandstone core from a North Sea gas-condensate reservoir, at velocities that are typical of the near-well region. The results show a clear increase in mobility with capillary number, and the paper describes how the data can be modeled with emp

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9

Stamatakis, Emmanuel, Are Haugan, C. Chatzichristos, et al. "Study of Calcium Carbonate Precipitation in the Near-Well Region Using 47Ca as Tracer." SPE Production & Operations 21, no. 01 (2006): 33–39. http://dx.doi.org/10.2118/87436-pa.

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10

Zhang, Ji, and Huilin Xing. "Numerical modeling of non-Darcy flow in near-well region of a geothermal reservoir." Geothermics 42 (April 2012): 78–86. http://dx.doi.org/10.1016/j.geothermics.2011.11.002.

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11

Robert, P., M. F. Devaux, A. Qannari, and M. Safar. "Mid and near Infrared Study of Carbohydrates by Canonical Correlation Analysis." Journal of Near Infrared Spectroscopy 1, no. 2 (1993): 99–108. http://dx.doi.org/10.1255/jnirs.13.

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Multivariate data treatments were applied to mid and near infrared spectra of glucose, fructose and sucrose solutions in order to specify near infrared frequencies that characterise each carbohydrate. As a first step, the mid and near infrared regions were separately studied by performing Principal Component Analyses. While glucose, fructose and sucrose could be clearly identified on the similarity maps derived from the mid infrared spectra, only the total sugar content of the solutions was observed when using the near infrared region. Characteristic wavelengths of the total sugar content were

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12

Abobaker, Ekhwaiter E. R., Abadelhalim Elsanoose, Faisal Khan, et al. "A new assessment of perforation skin factor for vertical perforated wells in near-wellbore region." Journal of Petroleum Exploration and Production Technology 12, no. 1 (2021): 117–33. http://dx.doi.org/10.1007/s13202-021-01326-8.

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AbstractThe perforating technique is one of the well completion methods and a final stage that helps connect reservoir formation to wellbore during hydrocarbon production. The present work aimed to determine the effect of the perforated casing completion on the pressure gradient and perforation skin factor in the vertical near-wellbore region. This work presented a novel experimental approach for studying the effect of perforation parameters on hydrocarbon production by creating a prototype representing the near-wellbore region. The study conducted extensive laboratory testing to create two pr

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13

Jiang, Youshi, Jinzhou Zhao, Yongming Li, Hu Jia, and Liehui Zhang. "Extended Finite Element Method for Predicting Productivity of Multifractured Horizontal Wells." Mathematical Problems in Engineering 2014 (2014): 1–9. http://dx.doi.org/10.1155/2014/810493.

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Based on the theory of the extended finite element method (XFEM), which was first proposed by Moës for dealing with the problem characterized by discontinuities, an extended finite element model for predicting productivity of multifractured horizontal well has been established. The model couples four main porous flow regimes, including fluid flow in the away-from-wellbore region of reservoir matrix, radial flow in the near-wellbore region of reservoir matrix, linear flow in the away-from-wellbore region of fracture, and radial flow in the near-wellbore region of fracture by considering mass tr

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14

Fu, Jianlin, Carl L. Axness, and J. Jaime Gomez-Hernandez. "Upscaling Transmissivity in the Near-Well Region for Numerical Simulation: A Comparison on Uncertainty Propagation." Engineering Applications of Computational Fluid Mechanics 5, no. 1 (2011): 49–66. http://dx.doi.org/10.1080/19942060.2011.11015352.

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15

Sathe, Sandip S., Kranti Patil, Rohit Chavan, Vaishnavi Jadhav, Shubham Kamble, and Uday Bhan. "Delineation of safe groundwater aquifers in a Fluoride contaminated region: Walwa Taluka, Maharashtra." E3S Web of Conferences 405 (2023): 04010. http://dx.doi.org/10.1051/e3sconf/202340504010.

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Groundwater aquifer contamination has leads health problems in village areas of Maharashtra, India. In this study, groundwater analysis was carried out for different groundwater parameters along with fluoride to delineate the high and low contaminated fluoride region in the Walwa taluka, Maharashtra. A distinct contaminated regions for high and low F‒ contaminated regions were identified in the collected post monsoon groundwater samples (n = 144). In total 98% samples are unsuitable for consumption. Hydro-geochemistry of the region showed highest anion concentration for bicarbonate (1880 mg/L)

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16

Song, Yong, Zhenlin Wang, Wei Wang, et al. "Coupled Thermal-Hydraulic-Mechanical Modeling of Near-Well Stress Evolution in Naturally Fractured Formations during Drilling." Processes 11, no. 6 (2023): 1744. http://dx.doi.org/10.3390/pr11061744.

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Naturally fractured formations usually have strong heterogeneities. Drilling and production operations in such formations can involve unwanted formation failure risks such as wellbore collapse and wellbore fracturing. This study presents a coupled thermal-hydraulic-mechanical numerical model for near-well stress evolutions during drilling in naturally fractured formations. The evolution of pressure, temperature, and geo-mechanical responses on the wellbore wall and in the near-well region is simulated. The effects of wellbore pressure, internal friction angle, and natural fracture length on fo

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17

Wang, Q., H. Zhan, and Z. Tang. "Forchheimer flow to a well considering time-dependent critical radius." Hydrology and Earth System Sciences Discussions 10, no. 11 (2013): 14095–129. http://dx.doi.org/10.5194/hessd-10-14095-2013.

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Abstract. Previous studies on the non-Darcian flow into a pumping well assumed that critical radius (RCD) was a constant or infinity, where RCD represents the location of the interface between the non-Darcian flow region and Darcian flow region. In this study, a two-region model considering time-dependent RCD was established, where the non-Darcian flow was described by the Forchheimer equation. A new iteration method was proposed to estimate RCD based on the finite-difference method. The results showed that RCD increased with time until reaching the quasi-steady state flow, and the asymptotic

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18

Liang, Zuoxiang, Dzianis Prakapenka, Paul M. VanRaden, Jicai Jiang, Li Ma, and Yang Da. "A Million-Cow Genome-Wide Association Study of Three Fertility Traits in U.S. Holstein Cows." International Journal of Molecular Sciences 24, no. 13 (2023): 10496. http://dx.doi.org/10.3390/ijms241310496.

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A genome-wide association study (GWAS) of the daughter pregnancy rate (DPR), cow conception rate (CCR), and heifer conception rate (HCR) using 1,001,374–1,194,736 first-lactation Holstein cows and 75,140–75,295 SNPs identified 7567, 3798, and 726 additive effects, as well as 22, 27, and 25 dominance effects for DPR, CCR, and HCR, respectively, with log10(1/p) > 8. Most of these effects were new effects, and some new effects were in or near genes known to affect reproduction including GNRHR, SHBG, and ESR1, and a gene cluster of pregnancy-associated glycoproteins. The confirmed effects inclu

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19

Tenge, Brad, B. R. Buchanan, and D. E. Honigs. "Calibration in the Fiber Optic Region of the Near-Infrared." Applied Spectroscopy 41, no. 5 (1987): 779–85. http://dx.doi.org/10.1366/0003702874448409.

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Chemical sensing in remote, hostile environments is possible with optical fiber technology. Telecommunications optical fiber transmits light in the near-infrared region. The least amount of attenuation of transmitted power is between 1050 nm and 1600 nm. It is a natural step to apply near-infrared analysis techniques to data remotely collected over optical fibers. A feasibility study is conducted to see how well calibration techniques, Multiple Linear Regression with either Step-up search or All Possible Combinations search, perform in the fiber optic region of the near-infrared. Calibration i

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20

Feng, Yan, Mingqiu Li, Qingyuan Deng, Peng Yu, Xiuqing Li, and Xi Yang. "Productivity Formula of Horizontal Well in Low-Permeability Gas Reservoir considering Multiple Factors." Geofluids 2023 (June 30, 2023): 1–13. http://dx.doi.org/10.1155/2023/9333441.

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For horizontal well in low-permeability gas reservoir, the effects of threshold pressure gradient, stress sensitivity, and gas slippage have significant impacts on the well productivity. At present, there are few productivity formulas for horizontal gas well considering all these factors. In this paper, based on the flow analysis of horizontal well in low-permeability gas reservoir, the whole flow field was divided into two parts, namely, far wellbore region and near wellbore region, among which the far wellbore region is composed of plane linear flow region and plane radial flow region and th

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21

Elwardany, Michael D., Jean-Pascal Planche, and Jeramie J. Adams. "Determination of Binder Glass Transition and Crossover Temperatures using 4-mm Plates on a Dynamic Shear Rheometer." Transportation Research Record: Journal of the Transportation Research Board 2673, no. 10 (2019): 247–60. http://dx.doi.org/10.1177/0361198119849571.

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The accurate rheological characterization of asphalt binder properties, as a function of pavement service life, is crucial to improving asphalt binder specifications, modifications, and formulation methods. Bitumen streams from refineries have experienced significant changes since the development of SHRP Superpave specifications as a result of economic, technical, and environmental reasons. Binder rheological behavior is divided into three regions: near glassy region, terminal region, and an intermediate “transition” region between them. At a reference frequency, these regions are separated by

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22

Goodarzi Ardakani, Vahid, Xin Tu, Alberto M. Gambaruto, et al. "Near-Wall Flow in Cerebral Aneurysms." Fluids 4, no. 2 (2019): 89. http://dx.doi.org/10.3390/fluids4020089.

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The region where the vascular lumen meets the surrounding endothelium cell layer, hence the interface region between haemodynamics and cell tissue, is of primary importance in the physiological functions of the cardiovascular system. The functions include mass transport to/from the blood and tissue, and signalling via mechanotransduction, which are primary functions of the cardiovascular system and abnormalities in these functions are known to affect disease formation and vascular remodelling. This region is denoted by the near-wall region in the present work, and we outline simple yet effecti

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23

Martins, Lucimara, Alberto Ardila, Ruth Gruenwald, and Ronaldo de Souza. "Extended Near-IR Spectra of NGC 1068." Proceedings of the International Astronomical Union 5, S267 (2009): 120. http://dx.doi.org/10.1017/s1743921310005818.

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AbstractNGC 1068 is a well-studied Seyfert type 2 AGN. Because of its proximity, it is one of the brightest Seyferts observed. Its nuclear region harbors a variety of astrophysical phenomena connected to physical conditions in the NLR and its emission lines. The relative importance of photoionization from the nucleus and shocks produced by jets has been long debated. To help resolve this controversy, we have carried out long-slit spectroscopy in the near-IR and present here for the first time spectroscopy of the whole range from 0.8 to 2.4 μm for this galaxy over 15″ in the nuclear region.

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24

Wang, Qidong, Zhenya Wei, Jiaen Wang, Wuwei Chen, and Naihan Wang. "Curve recognition algorithm based on edge point curvature voting." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 234, no. 4 (2019): 1006–19. http://dx.doi.org/10.1177/0954407019866975.

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In this paper, a new curve-lane recognition algorithm is proposed. The algorithm uses edge point curvature voting to determine the region of interest based on near-vision straight-lane information. First, information is detected in the near-vision area regarding the straight lines to the left and right of the current lane. Near-vision lane-line extraction includes lane image filtering, as well as edge detection of the region of interest below the vanishing line. The vanishing point is positioned by determining the position of the edge point and distribution of the direction angle. In addition,

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25

Capone, Alessandro, Fabio Di Felice, and Francisco Alves Pereira. "Particle Image Velocimetry measurements in a turbulent channel flow laden with elongated particles." Journal of Physics: Conference Series 2293, no. 1 (2022): 012005. http://dx.doi.org/10.1088/1742-6596/2293/1/012005.

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Abstract Particle Image Velocimetry is employed to investigate the turbulence modulation induced by dispersed elongated, rod-like particles in a turbulent channel flow. Particles with two different aspect ratios AR=40,80 are tested, at a volume fraction of 10-5. Carrier flow velocimetry data and distribution and orientation data of dispersed particles are obtained by an ad-hoc single-camera phase-discrimination technique. Carrier flow data shows that in the near-wall region turbulence modulation by particle occurrs as well as a decrease of average streamwise velocity. Analysis of conditional p

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26

Kampen, Jörg. "On American Derivatives and Related Obstacle Problems." International Journal of Theoretical and Applied Finance 06, no. 06 (2003): 565–91. http://dx.doi.org/10.1142/s0219024903002109.

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We derive obstacle problems for pricing of American derivatives with multiple underlyings heuristically using only a few postulates such that classical (Brownian motion) models as well as models based on Levy processes can be considered in our frame. For the classical models we define a "signed measure" which allows to compute the exercise region near maturity and obtain a generic condition for continuity of the free boundary and prove some more general features of exercise regions for classical models. Especially, we investigate the exercise regions of the most important American derivatives

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27

Lira, Paulina, Patricia Arévalo, Phil Uttley, Ian McHardy, and Elme Breedt. "X-Ray, Optical, and Near-IR Long-Term Monitoring of AGN." Proceedings of the International Astronomical Union 5, S267 (2009): 90–95. http://dx.doi.org/10.1017/s1743921310005624.

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AbstractWe are conducting long-term monitoring of several AGN with the aim of understanding the interplay between the emitting regions around the central black hole as well as the physics of the accreting flow. Here we present results for two of our sources, NGC 3783 and MR 2251–178, with strong evidence for disk-driven variability and the existence of cold accretion disks, where near-IR emission can be clearly detected from a region close to the black hole.

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28

Chen, Pei-Yuan, Ching-Pin Tung, Jung-Hsuan Tsao, and Chia-Jeng Chen. "Assessing Future Rainfall Intensity–Duration–Frequency Characteristics across Taiwan Using the k-Nearest Neighbor Method." Water 13, no. 11 (2021): 1521. http://dx.doi.org/10.3390/w13111521.

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This study analyzes the changes in rainfall intensities across Taiwan using the k-Nearest Neighbor method. Biases are corrected according to the identified discrepancy between the probability distribution of the model run and that of the observed data in the historical period. The projections of 21 weather stations in Taiwan under 10 (2RCP × 5GCM) scenarios for the near-(2021–2040) and far-future (2081–2100) are derived. The frequently occurred short-duration storm events in some regions decrease, but they are still vulnerable to flood considering the existing drainage capacities. More specifi

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29

Ding, D. Y. Y. "Modeling Formation Damage for Flow Simulations at Reservoir Scale." SPE Journal 15, no. 03 (2010): 737–50. http://dx.doi.org/10.2118/121805-pa.

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Summary Formation damage generally is limited to the immediate nearwellbore region and needs a particular near-well-flow modeling using fine gridblocks. However, near-well models are usually developed as standalone models and are decoupled from reservoir models. Using a standalone near-well model that does not take into account production scenarios cannot predict well injectivity or productivity correctly. In this paper, we propose a new technique for the coupled modeling of a near-well-flow model and a reservoir model in a simple and consistent way. In this new approach, data are exchanged an

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30

Davletshin, F. F., R. Z. Akchurin, R. F. Sharafutdinov, and D. F. Islamov. "Nonisothermal Fluid Flow in a Well during Induction Heating of the Casing String." Известия Российской академии наук. Механика жидкости и газа, no. 4 (July 1, 2023): 81–92. http://dx.doi.org/10.31857/s1024708423600045.

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The distinctive features of the flow velocity and temperature fields of ascending fluid flow in a metal round pipe (round casing string installed in a production well) under the conditions of its local induction heating are studied. The results of investigation are based on numerical solution of the Navier–Stokes equations in the Boussinesq–Oberbeck approximation. The calculations were performed using the Ansys Fluent software package (license ANSYS Academic Research CFD under the agreement with the Bashkir State University dated June 15, 2020). The fluid flow rates of 10 and 50 m3 per day are

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31

Garima, Bhardwaj, K. Sandhya, Dolia Richa, Abu-Samak M., Kumar Shalendra, and A. Alvi P. "A Comparative Study on Optical Characteristics of InGaAsP QW Heterostructures of Type-I and Type-II Band Alignments." Bulletin of Electrical Engineering and Informatics 7, no. 1 (2018): 35–41. https://doi.org/10.11591/eei.v7i1.872.

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In this paper, we have configured InGaAsP QW (quantum well) heterostructures of type-I and type-II band alignments and simulated their optical characteristics by solving 6 x 6 Kohn-Luttinger Hamiltonian Matrix. According to the simulation results, the InGaAsP QW heterostructure of type-I band alignment has been found to show peak optical gain (TE mode) of the order of~3600/cm at the transition wavelength~1.40 µm; while of type-II band alignment has achieved the peak gain (TE mode) of the order of~7800/cm at the wavelength of~1.85 µm (eye safe region). Thus, both of the heterostruct

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32

Yan, Jie, Nan Gui, Gongnan Xie, and Jinsen Gao. "Direct Numerical Simulation of Particle-Laden Swirling Flows on Turbulence Modulation." Mathematical Problems in Engineering 2014 (2014): 1–12. http://dx.doi.org/10.1155/2014/257837.

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The modulation of turbulence by the laden particles in swirling flows is studied via direct numerical simulation. The statistical characteristics of turbulence modulation are investigated in detail under the effects of different mass loadings as well as Stokes numbers. It is found that the characteristics of turbulence modulation for different Stokes numbers are very similar to each other when the mass loading is light. As the mass loading increases, small particles seem to modulate turbulence more rapidly than large particles. The number concentration or the number flow rate of particles play

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33

Corbett, Patrick William Michael, and Gleyden Lucila Benítez Duarte. "Understanding subsurface fluvial architecture from a combination of geological well test models and well test data." Geological Society, London, Special Publications 488, no. 1 (2018): 237–57. http://dx.doi.org/10.1144/sp488.7.

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AbstractTwo decades of geological modelling have resulted in the ability to study single-well geological models at a sufficiently high resolution to generate synthetic well test responses from numerical simulations in realistic geological models covering a range of fluvial styles. These 3D subsurface models are useful in aiding our understanding and mapping of the geological variation (as quantified by porosity and permeability contrasts) in the near-wellbore region. The building and analysis of these models enables many workflow steps, from matching well test data to improving history-matchin

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34

Jovanovic, Jovan, and Rafaela Hillerbrand. "On peculiar property of the velocity fluctuations in wall-bounded flows." Thermal Science 9, no. 1 (2005): 3–12. http://dx.doi.org/10.2298/tsci0501003j.

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Statistical analysis of the velocity fluctuations is performed for the near-wall region of wall-bounded flows. By demanding that the small-scale part of the fluctuations satisfies constraints imposed by local ax symmetry it was found that the small scales must be entirely suppressed in the near-wall region. This major conclusion is well supported by all available data from direct numerical simulations.

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35

Lazareva, O. S., and I. N. Sovetov. "Reserves for reducing production costs in the region." Lizing (Leasing), no. 4 (August 2, 2023): 35–39. http://dx.doi.org/10.33920/vne-03-2304-06.

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The paper considers the main reserves for reducing the cost price of bakery products of a bakery enterprise, as well as studies and performs calculations to reduce material costs. The reduction and preservation of the cost price of bread production for the near future is justified, and the financial results from saving raw material costs are determined.

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36

Hoshi, Y., and M. Tamura. "Dynamic multichannel near-infrared optical imaging of human brain activity." Journal of Applied Physiology 75, no. 4 (1993): 1842–46. http://dx.doi.org/10.1152/jappl.1993.75.4.1842.

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The present paper demonstrates functional brain mapping with an optical imaging technique by using tissue-transparent near-infrared light. With a maximal five-channel optical monitoring system, we succeeded in detecting region-specific changes in both the hemoglobin oxygenation state and blood volume during various mental tasks, in addition to visual and auditory stimulation. The time course of increases in blood supply varied with each brain region and depended on the type of internal operations occurring during the mental tasks. Changes in the hemoglobin oxygenation state were also different

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37

Bradley, Brendon A., Hoby N. T. Razafindrakoto, and M. Ahsan Nazer. "Strong ground motion observations of engineering interest from the 14 November 2016 Mw7.8 Kaikōura, New Zealand earthquake." Bulletin of the New Zealand Society for Earthquake Engineering 50, no. 2 (2017): 85–93. http://dx.doi.org/10.5459/bnzsee.50.2.85-93.

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This paper provides a brief discussion of observed strong ground motions from the 14 November 2016 Mw7.8 Kaikōura earthquake. Specific attention is given to examining observations in the near-source region where several ground motions exceeding 1.0g horizontal are recorded, as well as up to 2.7g in the vertical direction at one location. Ground motion response spectra in the near-source, North Canterbury, Marlborough and Wellington regions are also examined and compared with design levels. Observed spectral amplitudes are also compared with predictions from empirical and physics-based ground m

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38

Pressley, T. A. "Phylogenetic conservation of isoform-specific regions within alpha-subunit of Na(+)-K(+)-ATPase." American Journal of Physiology-Cell Physiology 262, no. 3 (1992): C743—C751. http://dx.doi.org/10.1152/ajpcell.1992.262.3.c743.

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Site-directed polyclonal antibodies were generated against four oligopeptides derived from the rat alpha-isoforms of Na(+)-K(+)-adenosinetriphosphatase (i.e., Na(+)-K+ pump) and were used to assess the phylogenetic conservation of the target regions. The first antibody was directed against a region near the phosphorylation site that is conserved among alpha-subunits from numerous species. The remaining antibodies were specific for the isoforms of alpha and recognized a region near the fluorescein isothiocyanate-reactive lysine of the adenine binding site. Immunoblots of protein from a number o

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39

Biswas, Nilormi, Arjun Dey, Saugata Kundu, Himel Chakraborty, and Anoop K. Mukhopadhyay. "Mechanical Properties of Enamel Nanocomposite." ISRN Biomaterials 2013 (April 9, 2013): 1–15. http://dx.doi.org/10.5402/2013/253761.

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For adult Indian premolar teeth, we report for the first time ever the simultaneous evaluations of nanohardness, Young's modulus, and fracture toughness of the enamel nanocomposite. The nanohardness and Young's moduli were evaluated from near the beginning of the middle enamel region to within ~10 μm of the dentino-enamel junction (DEJ) and in the dentin region using the nanoindentation technique. The fracture toughness from near the middle of the enamel region to near the DEJ zone was measured using the microindentation technique. The deformation was studied using scanning electron microscopy

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40

Carpenter, Chris. "Completion Design Evaluated by Use of Field Offset Well-Pressure Measurements." Journal of Petroleum Technology 73, no. 04 (2021): 46–47. http://dx.doi.org/10.2118/0421-0046-jpt.

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This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 201346, “Are We Overstimulating Our Laterals? Evaluating Completion Design Practices Based on Field Offset Well-Pressure Measurements,” by Puneet Seth, SPE, The University of Texas at Austin, and Brendan Elliott, SPE, and Trevor Ingle, SPE, Devon Energy, et al., prepared for the 2020 SPE Annual Technical Conference and Exhibition, originally scheduled to be held in Denver, Colorado, 5–7 October. The paper has not been peer reviewed. Increased injection volumes coupled with a suboptimal completion d

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MORLAND, L. W. "Asymptotic analysis of flow near a glacier terminus." Journal of Glaciology 64, no. 246 (2018): 536–42. http://dx.doi.org/10.1017/jog.2018.42.

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AbstractThe non-linearly viscous ice flow in the vicinity of a glacier terminus, an observation region, depends crucially on the upstream flow as well as on the local surface and bed conditions. The former requires a likely complex solution of the balance laws and boundary conditions for the complete glacier. However, if the profile and downstream surface tangential velocity in the observation region are measured at an observation time t = 0, and a two-dimensional flow approximation is satisfactory, the complete stress and velocity fields satisfying local reduced model equations in the observa

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EIFF, OLIVIER S., and JAMES F. KEFFER. "On the structures in the near-wake region of an elevated turbulent jet in a crossflow." Journal of Fluid Mechanics 333 (February 25, 1997): 161–95. http://dx.doi.org/10.1017/s0022112096004314.

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A pattern-recognition technique, applied to multi-point simultaneous velocity measurements obtained with 45° X-wire anemometer probes, is used to extract and characterize the underlying organized motions, i.e. coherent structures, within the near-wake region of a turbulent round jet discharged perpendicularly from a pipe into a crossflow. This flow has been found to be quite complex owing to its three-dimensional nature and the interactions between several flow regions. Analyses of the underlying coherent structures, which play an important role in the physics of the flow, are still rare and a

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Reeves, James B. "Near versus Mid-Infrared Spectroscopy for Quantitative Analysis of Chlorite Treated Forages and By-Products." Journal of Near Infrared Spectroscopy 2, no. 3 (1994): 153–62. http://dx.doi.org/10.1255/jnirs.42.

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The objective of this work was to explore the relative merits of near and mid-infrared diffuse reflectance spectroscopy in determining the composition of sodium chlorite treated forages and by-products. Sixteen feed-stuffs (174 total samples treated at one of 11 levels of sodium chlorite, 0 to 0.394 g per gram of feedstuff) were examined in the near and mid-infrared spectral regions using diffuse reflectance on a Fourier transform spectrometer, and in the near infrared region using a grating monochromator. Samples were scanned as is and as 5% sample in KBr on the Fourier spectrometer and as is

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Janssen, P. H., W. M. G. T. van den Broek, and C. K. Harris. "Laboratory Study Investigating Emulsion Formation in the Near-Wellbore Region of a High Water-Cut Oil Well." SPE Journal 6, no. 01 (2001): 71–79. http://dx.doi.org/10.2118/69740-pa.

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Li Jian-Jun. "Design of active region for GaAsP/AlGaAs tensile strain quantum well laser diodes near 800 nm wavelength." Acta Physica Sinica 67, no. 6 (2018): 067801. http://dx.doi.org/10.7498/aps.67.20171816.

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Park, Yong-Chan, Seunghee Kim, Jang Hyun Lee, and Young Jae Shinn. "Effect of reducing irreducible water saturation in a near-well region on CO2 injectivity and storage capacity." International Journal of Greenhouse Gas Control 86 (July 2019): 134–45. http://dx.doi.org/10.1016/j.ijggc.2019.04.014.

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ARONSON, DAG, ARNE V. JOHANSSON, and LENNART LÖFDAHL. "Shear-free turbulence near a wall." Journal of Fluid Mechanics 338 (May 10, 1997): 363–85. http://dx.doi.org/10.1017/s0022112097005065.

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The mean shear has a major influence on near-wall turbulence but there are also other important physical processes at work in the turbulence/wall interaction. In order to isolate these, a shear-free boundary layer was studied experimentally. The desired flow conditions were realized by generating decaying grid turbulence with a uniform mean velocity and passing it over a wall moving with the stream speed. It is shown that the initial response of the turbulence field can be well described by the theory of Hunt & Graham (1978). Later, where this theory ceases to give an accurate description,

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Gennari, Fulvia, Milica Sekulić, Tanja Barudžija, Željka Antić, Miroslav D. Dramićanin, and Alessandra Toncelli. "Infrared Photoluminescence of Nd-Doped Sesquioxide and Fluoride Nanocrystals: A Comparative Study." Crystals 12, no. 8 (2022): 1071. http://dx.doi.org/10.3390/cryst12081071.

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Lanthanide ions possess various emission channels in the near-infrared region that are well known in bulk crystals but are far less studied in samples with nanometric size. In this work, we present the infrared spectroscopic characterization of various Nd-doped fluoride and sesquioxide nanocrystals, namely Nd:Y2O3, Nd:Lu2O3, Nd:Sc2O3, Nd:YF3, and Nd:LuF3. Emissions from the three main emission bands in the near-infrared region have been observed and the emission cross-sections have been calculated. Moreover, another decay channel at around 2 μm has been observed and ascribed to the 4F3/2→4I15/

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Kaushik, Ajay, S. Indu, and Daya Gupta. "Adaptive Mobile Sink for Energy Efficient WSN Using Biogeography-Based Optimization." International Journal of Mobile Computing and Multimedia Communications 10, no. 3 (2019): 1–22. http://dx.doi.org/10.4018/ijmcmc.2019070101.

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Early death of cluster heads (CHs) located near the sink due to excessive data relay load causes energy holes in wireless sensor networks (WSNs). A widely adopted solution to energy hole problem is to divide the deployment region into multiple sub regions and use mobile sink (MS) to aggregate data from each sub-region. However, inside a sub-region, CHs close to MS dissipate their energy quickly and die despite of the sink mobility. The authors map the problem of distributing data relay load optimally to multiple CHs and locating MS near these multiple CHs using metaheuristic algorithm biogeogr

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Coleman, Timothy A., Anthony W. Lyza, and Wes Wyatt. "A Significant Tornado in a Heterogeneous Environment During VORTEX-SE." E-Journal of Severe Storms Meteorology 13, no. 2 (2021): 1–25. http://dx.doi.org/10.55599/ejssm.v13i2.70.

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On 1 March 2016, an EF2 tornado occurred near Birmingham, AL, and was examined as part of VORTEX-SE. The boundary-layer environment near the tornadic supercell was heterogeneous in space and unsteady in time, with what typically would be considered an excellent proximity sounding. In this case, however, the proximity sounding severely underestimated the CAPE. SPC mesoanalyses substantially underestimated the CAPE and wind shear as well. Tornadogenesis occurred near a weak, frontogenetical thermal boundary, where evaporation from antecedent light showers had also increased dewpoint values. A lo

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