152,982 research outputs found
A 2 h periodic variation in the low-mass X-ray binary Ser X-1
No full textSpectroscopy of the low-mass X-ray binary Ser X-1 using the Gran Telescopio Canarias have revealed a ?2 h periodic variability that is present in the three strongest emission lines. We tentatively interpret this variability as due to orbital motion, making it the first indication of the orbital period of Ser X-1. Together with the fact that the emission lines are remarkably narrow, but still resolved, we show that a main-sequence K dwarf together with a canonical 1.4 M? neutron star gives a good description of the system. In this scenario, the most likely place for the emission lines to arise is the accretion disc, instead of a localized region in the binary (such as the irradiated surface or the stream-impact point), and their narrowness is due instead to the low inclination (?10°) of Ser X-1
RAPID v1.8.0
No full textGeneral
The Routing Application for Parallel computatIon of Discharge (RAPID) is a river network routing model. Given surface and groundwater inflow to rivers, this model can compute flow and volume of water everywhere in river networks made out of many thousands of reaches.
For further information on RAPID including peer-reviewed publications, a manual, sample input/output data, sample processing scripts and animations of model results, please go to: http://www.rapid-hub.org/.
Associated publications
The initial peer-reviewed paper in which RAPID was presented is:
David, C. H., Maidment, D. R., Niu, G.-Y., Yang, Z.-L., Habets, F., & Eijkhout, V. (2011). River Network Routing on the NHDPlus Dataset. Journal of Hydrometeorology, 12(5), 913–934. https://doi.org/10.1175/2011JHM1345.1
This version v1.8.0 was used to produce the simulations that supported the writing of:
Emery, C. M., David, C. H., Andreadis, K. M., Turmon, M. J., Reager, J. T., Hobbs, J. M., et al. (2020). Underlying Fundamentals of Kalman Filtering for River Network Modeling. Journal of Hydrometeorology, 21(3), 453–474. https://doi.org/10.1175/JHM-D-19-0084.
RAPID v1.7.0
No full text<p><strong>General</strong></p>
<p>The Routing Application for Parallel computatIon of Discharge (RAPID) is a river network routing model. Given surface and groundwater inflow to rivers, this model can compute flow and volume of water everywhere in river networks made out of many thousands of reaches.</p>
<p>For further information on RAPID including peer-reviewed publications, a manual, sample input/output data, sample processing scripts and animations of model results, please go to: http://www.rapid-hub.org/.</p>
<p><strong>Associated publications</strong></p>
<p>The initial peer-reviewed paper in which RAPID was presented is:</p>
<ul>
<li>
<p>David, C. H., Maidment, D. R., Niu, G.-Y., Yang, Z.-L., Habets, F., & Eijkhout, V. (2011). River Network Routing on the NHDPlus Dataset. <em>Journal of Hydrometeorology</em>, <em>12</em>(5), 913–934. <a href="https://doi.org/10.1175/2011JHM1345.1">https://doi.org/10.1175/2011JHM1345.1</a></p>
</li>
</ul>
<p>This version v1.7.0 was used to produce the simulations that supported the writing of:</p>
<ul>
<li>
<p>David, C. H., Hobbs, J. M., Turmon, M. J., Emery, C. M., Reager, J. T., & Famiglietti, J. S. (2019). Analytical Propagation of Runoff Uncertainty Into Discharge Uncertainty Through a Large River Network. <em>Geophysical Research Letters</em>, <em>46</em>(14), 8102–8113. <a href="https://doi.org/10.1029/2019GL083342">https://doi.org/10.1029/2019GL083342</a></p>
</li>
</ul>
M. David Trommers/ Von Plauen aus dem Voigtlande/ Keyserl. gekr. Poetens/ und der H. Schrifft Ergeb. Nickerische Poesie
No full textM. DAVID TROMMERS/ VON PLAUEN AUS DEM VOIGTLANDE/ KEYSERL. GEKR. POETENS/ UND DER H. SCHRIFFT ERGEB. NICKERISCHE POESIE
M. David Trommers/ Von Plauen aus dem Voigtlande/ Keyserl. gekr. Poetens/ und der H. Schrifft Ergeb. Nickerische Poesie ([1]r)
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De Maiestate / Praeside M. Jacobo Thomasio, Moralis Philosoph. P. P., publice disputabit Johannes Dunte, R. L. Author & Respon: ad diem 9. Septembr. H L. Q. C.
No full textDE MAIESTATE / PRAESIDE M. JACOBO THOMASIO, MORALIS PHILOSOPH. P. P., PUBLICE DISPUTABIT JOHANNES DUNTE, R. L. AUTHOR & RESPON: AD DIEM 9. SEPTEMBR. H L. Q. C.
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Workshop on Science Opportunities for a Multidisciplinary Long-Range Aircraft for Antarctic Research: Program and Abstract Volume
No full textOrganizing Committee: Bea Csatho, David H. Bromwich, Michael Studinger, Thomas R. Parish, Robin Muench, and Jeff StithOffice of Polar Programs, National Science Foundatio
Pauli Sententiarum Fragmentum Leidense (Cod. Leid. B.P.L. 2589) ediderunt et commentariis instruxerunt G. G. Archi, M. David, E. Levy, R. Marichal, H. L. W. Nelson
No full textMallon Jean. Pauli Sententiarum Fragmentum Leidense (Cod. Leid. B.P.L. 2589) ediderunt et commentariis instruxerunt G. G. Archi, M. David, E. Levy, R. Marichal, H. L. W. Nelson. In: Scriptorium, Tome 11 n°2, 1957. pp. 320-323
Raw Light-Level Geolocator Data from Golden-Winged Warblers Breeding at Three Sites in North America
No full textThe .lig files are comma separated time stamped ASCII data files where each time-stamped record is on a separate line. The header line of each file contains a three-variable string. Its meaning is unclear. The header lines are removed before data analysis. The .lig files can be opened by any text editors. The original data analysis is read into R using a package called "BAStag". The descriptions (e.g. CM05) next to the files represent the individual Golden-winged Warbler from which the data are collected.21 raw light-level data files (.lig) from geolocators (Biotrak, Wareham, UK; model ML6240, 2-min light-sampling regime) deployed on 20 individual Golden-winged Warblers from three breeding locations in North America. These data were collected to provide information on the migration routes and timing, and nonbreeding locations of individuals from these populations to inform conservation and management strategies. These data are being released following the publication of these findings.These data were collected during a project funded by the U.S. Fish and Wildlife Service and U.S. Geological Survey through Research Work Order No. 98 at the U.S. Geological Survey, Minnesota Cooperative Fish and Wildlife Research Unit; by the National Science Foundation through Postdoctoral Research Fellowship No. 1202729 (H. Streby); and by the U.S.D.A Natural Resources Conservation Service in a grant administered by J. Larkin.Kramer, Gunnar R; Streby, Henry M; Peterson, Sean M; Lehman, Justin A; Buehler, David A.; Wood, Petra B; McNeil, Darin J; Larkin, Jeffrey L; Andersen, David E. (2016). Raw Light-Level Geolocator Data from Golden-Winged Warblers Breeding at Three Sites in North America. Retrieved from the University Digital Conservancy, http://doi.org/10.13020/D6R59C
Carbon Dioxide Capture in Metal–Organic Frameworks
No full textAbstract not availableKenji Sumida, David L. Rogow, Jarad A. Mason, Thomas M. McDonald, Eric D. Bloch, Zoey R. Herm, Tae-Hyun Bae, Jeffrey R. Lon
Joint growth hormone and cortisol spontaneous secretion is more asynchronous in older females than in their male counterparts
No full textIn humans, cortisol and GH are secreted in a pulsatile manner, and an interaction between GH and the hypothalamic-pituitary-adrenal axis has been established. In view of the sexually dimorphic pattern in GH secretion, we investigated the GH-cortisol bihormonal secretory dynamics in male and female healthy older individuals. We studied the GH and cortisol secretory patterns in 83 healthy subjects (45 men and 38 women; age range, 59.4–73.0 yr) by determining serum GH and cortisol concentrations at 20-min intervals for 24 h. The irregularity of GH and cortisol secretion was assessed using approximate entropy (ApEn), a scale- and model-independent statistic. The synchrony of joint GH-cortisol spontaneous secretion was quantified using the cross-ApEn statistic. Cross-correlation analysis of GH and cortisol patterns was computed at various time lags covering the 24-h period. Mean 24-h serum GH concentrations were significantly higher in females (mean, 1.31 mU/L; SD, 0.87) than in males (mean, 0.88 mU/L; SD, 0.42; P = 0.009), whereas mean 24-h serum total cortisol concentrations were higher in males (mean, 9.0 µg/dL; SD, 1.4) than in females (mean, 7.3 µg/dL; SD, 1.4; P = 0.0001). GH secretion was more irregular in females (mean ApEn, 0.81; SD, 0.23) than in males (mean ApEn, 0.60; SD, 0.20; P < 0.001). No significant difference in the regularity of cortisol secretion was noted between sexes. Cross-ApEn values of paired GH-cortisol were higher in females (mean, 1.15; SD, 0.18) than in males (mean, 1.01; SD, 0.16; P = 0.0003). Stepwise multiple linear regression analysis indicated that estradiol and insulin-like growth factor-binding protein-3 concentrations were independently related to GH ApEn values (r2 = 0.14; P = 0.01), whereas cross-ApEn values of paired GH-cortisol were best predicted by FSH concentrations (r2 = 0.37; P = 0.003). Cross-correlation analysis revealed a significant positive correlation between GH and cortisol, peaking at lag time of 4.7 h in males (r = 0.30; P < 0.0001) and 4.3 h in females (r = 0.14; P < 0.0001), with GH leading cortisol by these time intervals. In addition, a significant negative correlation between the two hormones was noted over time, peaking at 4.7 h in males (r = -0.21; P < 0.0001) and 6.3 h in females (r = -0.25; P < 0.0001), with cortisol leading GH by these time intervals. The above results indicate that in the elderly, females have a more disordered GH secretory pattern and a more asynchronous joint GH-cortisol secretion than their male counterparts. These observations most likely reflect bidirectional interactions between the GH and hypothalamic-pituitary-adrenal axis in humans as well as diminution of subsystem integrity and synchronous control of interconnected hormonal systems with advancing age. <br/
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