Log in

Relevant bibliographies by topics / Ray-Born / Journal articles

To see the other types of publications on this topic, follow the link: Ray-Born.

Journal articles on the topic 'Ray-Born'

Author: Grafiati

Published: 4 June 2021

Last updated: 14 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Ray-Born.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Beydoun, Wafik B., and Manuela Mendes. "Elastic Ray-Born L2-Migration/Inversion." Geophysical Journal International 97, no. 1 (1989): 151–60. http://dx.doi.org/10.1111/j.1365-246x.1989.tb00490.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Bansal, Rishi, and Mrinal K. Sen. "Ray-Born inversion for fracture parameters." Geophysical Journal International 180, no. 3 (2010): 1274–88. http://dx.doi.org/10.1111/j.1365-246x.2009.04484.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Sarajaervi, Martin, and Henk Keers. "Computation of ray-Born seismograms using isochrons." GEOPHYSICS 83, no. 5 (2018): T245—T256. http://dx.doi.org/10.1190/geo2017-0669.1.

Full text

Abstract:

Seismic modeling in heterogeneous media is accomplished by using either approximate or fully numerical methods. A popular approximate method is ray-Born modeling, which requires the computation of 3D integrals. We have developed an integration technique for accurate and, under certain circumstances, efficient evaluation of the ray-Born integrals in the time domain. The 3D integrals are split into several 2D integrals, each of which gives the wavefield at a certain time, so that the waveform at each time step is computed independently of all other times. We compute seismograms for 3D heterogene

APA, Harvard, Vancouver, ISO, and other styles

4

Ghisellini, G., A. Celotti, G. Ghirlanda, C. Firmani, and L. Nava. "Re-born fireballs in gamma-ray bursts." Monthly Notices of the Royal Astronomical Society: Letters 382, no. 1 (2007): L72—L76. http://dx.doi.org/10.1111/j.1745-3933.2007.00392.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Bieber, J. W., and R. A. Burger. "Cosmic-ray streaming in the Born approximation." Astrophysical Journal 348 (January 1990): 597. http://dx.doi.org/10.1086/168266.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Coates, R. T., and C. H. Chapman. "Ray perturbation theory and the Born approximation." Geophysical Journal International 100, no. 3 (1990): 379–92. http://dx.doi.org/10.1111/j.1365-246x.1990.tb00692.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Incagli, Marco. "Precision Cosmic Ray physics with space-born experiment." EPJ Web of Conferences 121 (2016): 03001. http://dx.doi.org/10.1051/epjconf/201612103001.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Lambaré, Gilles, Stéphane Operto, Pascal Podvin, and Philippe Thierry. "3D ray+Born migration/inversion—Part 1: Theory." GEOPHYSICS 68, no. 4 (2003): 1348–56. http://dx.doi.org/10.1190/1.1598128.

Full text

Abstract:

Prestack ray+Born migration/inversion can be split in two steps : the computation of common image gathers (CIGs) and their weighted stack (the migration stack). The choice of the domain for the CIGs (shot, offset, angle, etc.) has a direct impact on the resolution of the migration stack. This resolution can be studied easily in the frame of ray+Born migration/inversion theory resulting into improved migration/inversion formulas according to the acquisition geometry. This paper is devoted to this analysis in the cases of a simple 2D acquisition and of a 3D swath acquisition, both corresponding

APA, Harvard, Vancouver, ISO, and other styles

9

Sarin, Nikhil, Paul D. Lasky, and Gregory Ashton. "Interpreting the X-ray afterglows of gamma-ray bursts with radiative losses and millisecond magnetars." Monthly Notices of the Royal Astronomical Society 499, no. 4 (2020): 5986–92. http://dx.doi.org/10.1093/mnras/staa3090.

Full text

Abstract:

ABSTRACT The spin-down energy of millisecond magnetars has been invoked to explain X-ray afterglow observations of a significant fraction of short and long gamma-ray bursts. Here, we extend models previously introduced in the literature, incorporating radiative losses with the spin-down of a magnetar central engine through an arbitrary braking index. Combining this with a model for the tail of the prompt emission, we show that our model can better explain the data than millisecond-magnetar models without radiative losses or those that invoke spin-down solely through vacuum dipole radiation. We

APA, Harvard, Vancouver, ISO, and other styles

10

Thierry, Philippe, Stéphane Operto, and Gilles Lambaré. "Fast 2-D ray+Born migration/inversion in complex media." GEOPHYSICS 64, no. 1 (1999): 162–81. http://dx.doi.org/10.1190/1.1444513.

Full text

Abstract:

In this paper, we evaluate the capacity of a fast 2-D ray+Born migration/inversion algorithm to recover the true amplitude of the model parameters in 2-D complex media. The method is based on a quasi‐Newtonian linearized inversion of the scattered wavefield. Asymptotic Green’s functions are computed in a smooth reference model with a dynamic ray tracing based on the wavefront construction method. The model is described by velocity perturbations associated with diffractor points. Both the first traveltime and the strongest arrivals can be inverted. The algorithm is implemented with several nume

APA, Harvard, Vancouver, ISO, and other styles

11

Weng, S. C., Y. R. Lee, W. H. Sun, P. Y. Stetsko, and S. L. Chang. "Multiple-wave X-ray resonant diffraction using iterative Born approximation." Acta Crystallographica Section A Foundations of Crystallography 64, a1 (2008): C576. http://dx.doi.org/10.1107/s0108767308081488.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Birch, A. C., and A. G. Kosovichev. "Towards a Wave Theory Interpretation of Time-Distance Helioseismology Data." Symposium - International Astronomical Union 203 (2001): 180–82. http://dx.doi.org/10.1017/s0074180900219025.

Full text

Abstract:

Time-distance helioseismology, which measures the time for acoustic waves to travel between points on the solar surface, has been used to study small-scale three-dimensional features in the sun, for example active regions, as well as large-scale features, such as meridional flow, that are not accessible by standard global helioseismology. Traditionally, travel times have been interpreted using geometrical ray theory, which is not always a good approximation. In order to develop a wave interpretation of time-distance data we employ the first Born approximation, which takes into account finite-w

APA, Harvard, Vancouver, ISO, and other styles

13

Operto, M. Stéphane, Sheng Xu, and Gilles Lambaré. "Can we quantitatively image complex structures with rays?" GEOPHYSICS 65, no. 4 (2000): 1223–38. http://dx.doi.org/10.1190/1.1444814.

Full text

Abstract:

Ray‐based prestack depth migration fails to image quantitatively complex structures when a single arrival—for example, the first or the strongest one—is taken into account. In this paper, we investigate whether accounting for multiple arrivals in ray‐based preserved amplitude prestack depth migration allows one to improve quantitative imaging of complex media. The asymptotic ray‐Born migration/inversion, originally designed to process one single arrival, is extended to the case of multiple arrivals by accounting for the cross‐contributions of all the source and receiver raypaths. Multiple arri

APA, Harvard, Vancouver, ISO, and other styles

14

Djebbi, Ramzi, and Tariq Alkhalifah. "Hybrid frequency-domain full-waveform inversion using ray+Born sensitivity kernels." GEOPHYSICS 85, no. 4 (2020): R339—R347. http://dx.doi.org/10.1190/geo2019-0529.1.

Full text

Abstract:

Full-waveform inversion (FWI) using the scattering integral (SI) approach is an explicit formulation of the inversion optimization problem. The inversion procedure is straightforward, and the dependence of the data residuals on the model parameters is clear. However, the biggest limitation associated with this approach is the huge computational cost in conventional exploration seismology applications. Modeling from each of the source and receiver locations is required to compute the update at every iteration, and that is prohibitively expensive, especially for 3D problems. To deal with this is

APA, Harvard, Vancouver, ISO, and other styles

15

Moser, Tijmen Jan. "Review of ray-Born forward modeling for migration and diffraction analysis." Studia Geophysica et Geodaetica 56, no. 2 (2012): 411–32. http://dx.doi.org/10.1007/s11200-011-9046-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Šachl, Libor. "Validation of 3D synthetic seismograms based on the ray-Born approximation." Studia Geophysica et Geodaetica 57, no. 1 (2012): 84–102. http://dx.doi.org/10.1007/s11200-012-0722-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Guerrero, Martín A., You-Hua Chu, Wolf-Rainer Hamann, et al. "Ablation and Wind Mass-Loading in the Born-Again Planetary Nebula A 30." Proceedings of the International Astronomical Union 7, S283 (2011): 378–79. http://dx.doi.org/10.1017/s1743921312011519.

Full text

Abstract:

AbstractWe present XMM-Newton and Chandra observations of the born-again planetary nebula A 30. These X-ray observations reveal a bright unresolved source at the position of the central star whose X-ray luminosity exceeds by far the model expectations for photospheric emission and for shocks within the stellar wind. We suggest that a “born-again hot bubble” may be responsible for this X-ray emission. Diffuse X-ray emission associated with the petal-like features and one of the H-poor knots seen in the optical is also found. The weakened emission of carbon lines in the spectrum of the diffuse e

APA, Harvard, Vancouver, ISO, and other styles

18

Thierry, Philippe, Gilles Lambaré, Pascal Podvin, and Mark S. Noble. "3-D preserved amplitude prestack depth migration on a workstation." GEOPHYSICS 64, no. 1 (1999): 222–29. http://dx.doi.org/10.1190/1.1444518.

Full text

Abstract:

We present an algorithm based on the ray+Born approximation for 3-D preserved amplitude prestack depth migration (PAPsDM) of seismic reflection data. This ray+Born inversion scheme allows the quantitative recovery of model perturbations. The Green’s functions are estimated by dynamic ray tracing in 3-D heterogeneous smooth velocity fields with a wavefront construction (WFC) method. The PAPsDM algorithm was implemented on a single‐processor Sun Sparc 20 workstation. Special attention was paid to CPU efficiency and memory requirements. We present an application on a 3-D real marine data set (13

APA, Harvard, Vancouver, ISO, and other styles

19

Joseph, C., G. Etienne, E. Forgues, et al. "Monitoring of SAGD Process: Seismic Interpretation of Ray+Born Synthetic 4D Data." Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles 67, no. 2 (2012): 263–88. http://dx.doi.org/10.2516/ogst/2011168.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Lu, Xinhui, Kevin G. Yager, Danvers Johnston, Charles T. Black, and Benjamin M. Ocko. "Grazing-incidence transmission X-ray scattering: surface scattering in the Born approximation." Journal of Applied Crystallography 46, no. 1 (2013): 165–72. http://dx.doi.org/10.1107/s0021889812047887.

Full text

Abstract:

Determination of the three-dimensional order in thin nanostructured films remains challenging. Real-space imaging methods, including electron microscopies and scanning-probe methods, have difficulty reconstructing the depth of a film and suffer from limited statistical sampling. X-ray and neutron scattering have emerged as powerful complementary techniques but have substantial data collection and analysis challenges. This article describes a new method, grazing-incidence transmission small-angle X-ray scattering, which allows for fast scattering measurements that are not burdened by the refrac

APA, Harvard, Vancouver, ISO, and other styles

21

Guerrero, M. A., N. Ruiz, W. R. Hamann, et al. "REBIRTH OF X-RAY EMISSION FROM THE BORN-AGAIN PLANETARY NEBULA A30." Astrophysical Journal 755, no. 2 (2012): 129. http://dx.doi.org/10.1088/0004-637x/755/2/129.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Birch, A. C., A. G. Kosovichev, G. H. Price, and R. B. Schlottmann. "The Accuracy of the Born and Ray Approximations in Time-Distance Helioseismology." Astrophysical Journal 561, no. 2 (2001): L229—L232. http://dx.doi.org/10.1086/324766.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Toalá, J. A., M. A. Guerrero, H. Todt, et al. "THE BORN-AGAIN PLANETARY NEBULA A78: AN X-RAY TWIN OF A30." Astrophysical Journal 799, no. 1 (2015): 67. http://dx.doi.org/10.1088/0004-637x/799/1/67.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Gibson, Richard L., Fausto Batini, and M. Nafi Toksöuz. "Ray-Born Modelling of Fracture-Zone Reflections In the Larderello Geothermal Field." Geophysical Journal International 114, no. 1 (1993): 81–90. http://dx.doi.org/10.1111/j.1365-246x.1993.tb01468.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Lo, Tien‐when, M. Nafi Toksöz, Shao‐hui Xu, and Ru‐Shan Wu. "Ultrasonic laboratory tests of geophysical tomographic reconstruction." GEOPHYSICS 53, no. 7 (1988): 947–56. http://dx.doi.org/10.1190/1.1442531.

Full text

Abstract:

In this study, we test geophysical ray tomography and geophysical diffraction tomography by scaled model ultrasonics experiments. First, we compare the performance of these two methods under limited view‐angle conditions. Second, we compare the adaptabilities of these two methods to objects of various sizes and acoustic properties. Finally, for diffraction tomography, we compare the Born and Rytov approximations based on the induced image distortion by using these two approximation methods. Our experimental results indicate the following: (1) When the scattered field can be obtained, geophysic

APA, Harvard, Vancouver, ISO, and other styles

26

Strang, L. C., A. Melatos, N. Sarin, and P. D. Lasky. "Inferring properties of neutron stars born in short gamma-ray bursts with a plerion-like X-ray plateau." Monthly Notices of the Royal Astronomical Society 507, no. 2 (2021): 2843–55. http://dx.doi.org/10.1093/mnras/stab2210.

Full text

Abstract:

ABSTRACT Time-resolved spectra of six short gamma-ray bursts (sGRBs), measured by the Swift telescope, are used to estimate the parameters of a plerion-like model of the X-ray afterglow. The unshrouded, optically thin component of the afterglow is modelled as emanating from an expanding bubble of relativistic, shock-accelerated electrons fuelled by a central object. The electrons are injected with a power-law distribution and cool mainly by synchrotron losses. We compute posteriors for model parameters describing the central engine (e.g. spin frequency at birth, magnetic field strength) and sh

APA, Harvard, Vancouver, ISO, and other styles

27

Rajagukguk, Ricki, Muhammad Sholeh Kosim, Arsita Eka Rini, and Mardiana Mardiana. "Meconium-stained amniotic fluid viscosity and chest x-ray findings." Paediatrica Indonesiana 52, no. 6 (2012): 336. http://dx.doi.org/10.14238/pi52.6.2012.336-40.

Full text

Abstract:

Background Approximately 8-15% of all infants are born withevidence of meconium-stained amniotic fluid (MSAF). Manyof these infants rapidly initiate a good respiratory response andare othenvise vigorous. Other infants present v.ith a variety ofrespiratory distress. Chest x-ray imaging is the main test done toevaluate respiratory distress in order to differentiate pulmonaryand extrapulmonary etiologies.Objective To determine the relationship between viscosity ofMSAF and chest x-ray imaging results.Methods This cross-sectional study was held from January to June2011, as a continuation of a previ

APA, Harvard, Vancouver, ISO, and other styles

28

Birch, A. C., and G. Felder. "Accuracy of the Born and Ray Approximations for Time‐Distance Helioseismology of Flows." Astrophysical Journal 616, no. 2 (2004): 1261–64. http://dx.doi.org/10.1086/424961.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Mokhtarzadeh, Mahsa, and Karl F. Ludwig. "Simulations of Co-GISAXS during kinetic roughening of growth surfaces." Journal of Synchrotron Radiation 24, no. 6 (2017): 1187–94. http://dx.doi.org/10.1107/s1600577517011924.

Full text

Abstract:

The recent development of surface growth studies using X-ray photon correlation spectroscopy in a grazing-incidence small-angle X-ray scattering (Co-GISAXS) geometry enables the investigation of dynamical processes during kinetic roughening in greater detail than was previously possible. In order to investigate the Co-GISAXS behavior expected from existing growth models, calculations and (2+1)-dimension simulations of linear Kuramoto–Sivashinsky and non-linear Kardar–Parisi–Zhang surface growth equations are presented which analyze the temporal correlation functions of the height–height struct

APA, Harvard, Vancouver, ISO, and other styles

30

Yu, Yun-Wei, K. S. Cheng, and Xiao-Feng Cao. "THE ROLE OF NEWLY BORN MAGNETARS IN GAMMA-RAY BURST X-RAY AFTERGLOW EMISSION: ENERGY INJECTION AND INTERNAL EMISSION." Astrophysical Journal 715, no. 1 (2010): 477–84. http://dx.doi.org/10.1088/0004-637x/715/1/477.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Renault-Tinacci, N., K. Kotera, A. Neronov та S. Ando. "Search for γ-ray emission from superluminous supernovae with the Fermi-LAT". Astronomy & Astrophysics 611 (березень 2018): A45. http://dx.doi.org/10.1051/0004-6361/201730741.

Full text

Abstract:

We present the first individual and stacking systematic search for γ-ray emission in the GeV band in the directions of 45 superluminous supernovae (SLSNe) with the Fermi Large Area Telescope (LAT). No excess of γ-rays from the SLSN positions was found. We report γ-ray luminosity upper limits and discuss the implication of these results on the origin of SLSNe and, in particular, the scenario of central compact object-aided SNe. From the stacking search, we derived an upper limit at 95% confidence level to the γ-ray luminosity (above 600 MeV) Lγ < 9.1 × 1041 erg s−1 for an assumed E−2 photon

APA, Harvard, Vancouver, ISO, and other styles

32

Operto, Stéphane, Gilles Lambaré, Pascal Podvin, and Philippe Thierry. "3D ray+Born migration/inversion—Part 2: Application to the SEG/EAGE overthrust experiment." GEOPHYSICS 68, no. 4 (2003): 1357–70. http://dx.doi.org/10.1190/1.1598129.

Full text

Abstract:

The SEG/EAGE overthrust model is a synthetic onshore velocity model that was used to generate several large synthetic seismic data sets using acoustic finite‐difference modeling. From this database, several realistic subdata sets were extracted and made available for testing 3D processing methods. For example, classic onshore‐type data‐acquisition geometries are available such as a swath acquisition, which is characterized by a nonuniform distribution of long offsets with azimuth and midpoints. In this paper, we present an application of 2.5D and 3D ray‐Born migration/inversion to several clas

APA, Harvard, Vancouver, ISO, and other styles

33

Chen Rongchang, 陈荣昌, 谢红兰 Xie Honglan, 杜国浩 Du Guohao, et al. "Experimental Investigation on X-Ray Micro-Computed Tomography by Phase Retrieval with Born Approximations." Acta Optica Sinica 30, no. 4 (2010): 1106–11. http://dx.doi.org/10.3788/aos20103004.1106.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Hori, Chikahide, Hirokazu Tsukahara, Yasushi Fujii, et al. "Bone Mineral Status in Preterm-Born Children: Assessment by Dual-Energy X-Ray Absorptiometry." Neonatology 68, no. 4 (1995): 254–58. http://dx.doi.org/10.1159/000244243.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Stetsko, Yuri P., Yen-Ru Lee, Mau-Tsu Tang, and Shih-Lin Chang. "Phase-dependent polarization aspects of three-wave X-ray diffraction: an iterative Born approximation." Acta Crystallographica Section A Foundations of Crystallography 60, no. 1 (2003): 64–74. http://dx.doi.org/10.1107/s0108767303025017.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Beye, M., and A. Föhlisch. "A soft X-ray approach to electron–phonon interactions beyond the Born–Oppenheimer approximation." Journal of Electron Spectroscopy and Related Phenomena 184, no. 3-6 (2011): 313–17. http://dx.doi.org/10.1016/j.elspec.2010.12.032.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Hou, Jie, and William W. Symes. "An alternative formula for approximate extended Born inversion." GEOPHYSICS 82, no. 1 (2017): S1—S8. http://dx.doi.org/10.1190/geo2016-0327.1.

Full text

Abstract:

Various modifications of reverse time migration (RTM) provide asymptotic inverses to the subsurface offset extended Born modeling operator for constant-density acoustics. These approximate inverses have the same quality (asymptotic accuracy) as do generalized Radon transform pseudoinverses, but they can be computed without any ray tracing whatsoever. We have developed an approximate inverse of this type whose additional computational cost, above that of subsurface offset extended RTM, is negligible.

APA, Harvard, Vancouver, ISO, and other styles

38

Pavlov, George G., Divas Sanwal, and Marcus A. Teter. "Central Compact Objects in Supernova Remnants." Symposium - International Astronomical Union 218 (2004): 239–46. http://dx.doi.org/10.1017/s0074180900181069.

Full text

Abstract:

There are point-like sources in central regions of several supernova remnants which have not been detected outside the X-ray range. The X-ray spectra of these Central Compact Objects (CCOs) have thermal components with blackbody temperatures of 0.2–0.5 keV and characteristic sizes of 0.3-3 km. Most likely, the CCOs are neutron stars born in supernova explosions. We overview their observational properties, emphasizing the Chandra data, and compare them with magnetars.

APA, Harvard, Vancouver, ISO, and other styles

39

Chaparro, M. Pia, Ilona Koupil, and Liisa Byberg. "Maternal pre-pregnancy BMI and offspring body composition in young adulthood: the modifying role of offspring sex and birth order." Public Health Nutrition 20, no. 17 (2017): 3084–89. http://dx.doi.org/10.1017/s1368980017002191.

Full text

Abstract:

AbstractObjectiveTo investigate if the association between maternal pre-pregnancy BMI and offspring’s body composition in late adolescence and young adulthood varies by offspring birth order and sex.DesignFamily cohort study, with data from registers, questionnaires and physical examinations. The main outcome under study was offspring body composition (percentage fat mass (%FM), percentage lean mass (%LM)) measured by dual-energy X-ray absorptiometry.SettingUppsala, Sweden.SubjectsTwo hundred and twenty-six siblings (first-born v. second-born; average age 19 and 21 years) and their mothers.Res

APA, Harvard, Vancouver, ISO, and other styles

40

MOLDÓN, J., M. RIBÓ, J. M. PAREDES, et al. "VLBA ASTROMETRY OF LS 5039 AND PSR J1825-1446: WHICH SOURCE IS RELATED TO SNR G016.8-01.1?" International Journal of Modern Physics: Conference Series 08 (January 2012): 372–75. http://dx.doi.org/10.1142/s2010194512004928.

Full text

Abstract:

The supernova remnant SNR G016.8-01.1 is close to the gamma-ray binary system LS 5039, one of the five gamma-ray binaries currently known. LS 5039 appears to have been born in the SNR G016.8-01.1 just ~ 105 yr ago, as indicated by its proper motion. This association would provide direct implications on the nature and properties of the unknown compact object in the binary system. However, there is another source close to SNR G016.8-01.1 that could have been born during the SN explosion: the pulsar PSR J1825-1446, for which the proper motion is unknown. We are measuring the proper motion of both

APA, Harvard, Vancouver, ISO, and other styles

41

Engan, Mette, Maria Vollsæter, Knut Øymar, et al. "Comparison of physical activity and body compA validated question from the osition in a cohort of children born extremely preterm or with extremely low birth weight to matched term-born controls: a follow-up study." BMJ Paediatrics Open 3, no. 1 (2019): e000481. http://dx.doi.org/10.1136/bmjpo-2019-000481.

Full text

Abstract:

ObjectivesTo compare physical activity and body composition in a cohort of children born extremely preterm/extremely low birth weight (EP/ELBW) with term-born (TB) controls.MethodsA regional cohort of children born during 1999–2000 at gestational age <28 weeks or with birth weight <1000 g and their individually matched TB controls were examined in 2010–2011. Information on physical activity was obtained from parental questionnaires, and body composition was determined by anthropometry and dual X-ray absorptiometry.ResultsFifty-seven EP/ELBW and 57 TB controls were included at a mean age

APA, Harvard, Vancouver, ISO, and other styles

42

Shao, Yong, and Xiang-Dong Li. "Formation of Binary and Millisecond Pulsars: Puzzles and Possible Solutions." Proceedings of the International Astronomical Union 8, S291 (2012): 499–501. http://dx.doi.org/10.1017/s1743921312024659.

Full text

Abstract:

AbstractWe present a systematic study of the evolution of intermediate- and low-mass X-ray binaries. Our calculations suggest that millisecond binary pulsars in wide orbits might have neutron stars born massive, or been formed through mass transfer driven by planet/brown dwarf-involved common envelope evolution.

APA, Harvard, Vancouver, ISO, and other styles

43

Fortmann, C., T. Bornath, R. Redmer, et al. "X-ray Thomson scattering cross-section in strongly correlated plasmas." Laser and Particle Beams 27, no. 2 (2009): 311–19. http://dx.doi.org/10.1017/s026303460900041x.

Full text

Abstract:

AbstractWith the advent of intense, coherent light sources in the XUV and soft X-ray regime, X-ray Thomson scattering becomes a unique tool for the diagnostics of dense plasmas. The scattering spectrum gives direct access to plasma properties like density, temperature, and composition. In dense systems, collisions among constituents are of primary importance for the prediction and interpretation of the scattering signal. We present a systematic approach to the dynamical structure factor using the Born-Mermin ansatz to include collisions via the dynamical collision frequency. Calculations of th

APA, Harvard, Vancouver, ISO, and other styles

44

Yu, Yun-Wei, Xiao-Feng Cao, and Xiao-Ping Zheng. "THE NEWLY BORN MAGNETARS POWERING GAMMA-RAY BURST INTERNAL-PLATEAU EMISSION: ARE THERE STRANGE STARS?" Astrophysical Journal 706, no. 2 (2009): L221—L225. http://dx.doi.org/10.1088/0004-637x/706/2/l221.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Boschi, Lapo. "Global multiresolution models of surface wave propagation: comparing equivalently regularized Born and ray theoretical solutions." Geophysical Journal International 167, no. 1 (2006): 238–52. http://dx.doi.org/10.1111/j.1365-246x.2006.03084.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Mei, Cexiang, Yongtao Zhao, Xiaoan Zhang, et al. "X-ray emission induced by 1.2–3.6 MeV Kr13+ ions." Laser and Particle Beams 30, no. 4 (2012): 665–70. http://dx.doi.org/10.1017/s0263034612000638.

Full text

Abstract:

AbstractX-ray emission from Kr13+ ions in the energy range 1.2–3.6 MeV in steps of 0.6 MeV impacting on an Au target was investigated on electron cyclotron resonance ion source at the Heavy Ion Research Facility in Lanzhou. It was found that a shift of the X-ray lines to the higher energy side occurred. We measured the relationship between the characteristic of X-ray yield of Au M X-rays and Kr L X-rays as a function of incident energy. Furthermore, M-shell X-ray production cross-section of Au induced by Kr13+ was measured. The measured cross-section of target is compared to the classical bina

APA, Harvard, Vancouver, ISO, and other styles

47

Shamoon, Muhammad, Zunaira, Muhammad Ahsan, Tehmina Maqbool, Rabia Aslam, and Ambreen Yaseen. "Congenital heart defects in neonates born to diabetic mother (IDM): A single center experience." Professional Medical Journal 27, no. 05 (2020): 950–56. http://dx.doi.org/10.29309/tpmj/2020.27.05.3924.

Full text

Abstract:

Neonates born to diabetic mothers babies are more prone to develop congenital anomalies and defects. Overall risk of development of congenital malformations increases by 2-12% compared to normal neonates. In Pakistan, the true prevalence of CHD is unknown. Objectives: To determine the frequency of congenital heart diseases in infants born to diabetic mothers (IDM). Study Design: Cross Sectional Study. Setting: Pediatric Ward, Emergency and OPD, Allied Hospital, Faisalabad. Period: Six month after the approval of synopsis, August 16, 2017 to February 16, 2018. Material & Methods: Total 295

APA, Harvard, Vancouver, ISO, and other styles

48

Cesar, Amary, Faris Gel’mukhanov, Yi Luo, et al. "Resonant x-ray scattering beyond the Born–Oppenheimer approximation: Symmetry breaking in the oxygen resonant x-ray emission spectrum of carbon dioxide." Journal of Chemical Physics 106, no. 9 (1997): 3439–56. http://dx.doi.org/10.1063/1.474111.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Tanaka, Yasuo. "Recent Advances in X-Ray Astronomy." Highlights of Astronomy 10 (1995): 3–16. http://dx.doi.org/10.1017/s1539299600010327.

Full text

Abstract:

X-ray astronomy was born in June 1962 with a totally unexpected discovery of a bright X-ray source (presently known as Sco X-1) in a historic rocket flight conducted by Riccardo Giacconi, Herb Gursky, Frank Paolini and late Bruno Rossi. In the last 30 years, astronomy through the newly opened window has made a dramatic expansion.The universe contains enormously rich varieties which had been left unexplored until recent times. From 40’s through 60’s, new wavelength windows, radio, infrared and X-rays successively opened. As a result, the presence of objects and regions distributed over an extre

APA, Harvard, Vancouver, ISO, and other styles

50

Sanghvi, Urvi, and Krishna Kumar Diwakar. "Can Clinical Score Be Used to Guide Investigations and Management of Infants Born Through Meconium Stained Amniotic Fluid? A Prospective Observational Study*." Journal of Neonatology 33, no. 1-4 (2019): 5–9. http://dx.doi.org/10.1177/0973217920921390.

Full text

Abstract:

Objective: To evaluate if Downes– Vidyasagar score (Downes score) for assessing respiratory distress could be used to determine the duration for observation and requirement for investigations like chest X-ray and blood gases, in an infant born through meconium stained amniotic fluid (MSAF). Materials and Methods: Prospective observational study was done in 2 phases—the initial phase to assess the role of the Downes score and the second phase to assess if the conclusions drawn from the initial phase could be applied in clinical practice. Results: In the initial phase, a total of 285 of the 302

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!