62,167 research outputs found
Python scripts to test gravity with the dynamics of wide binary stars
No full textA wide binary sample within 200 pc, a virtual Newtonian sample, and several python scripts are provided to supplement Chae, K.-H. 2023, to be published in the Astrophysical Journal (arXiv:2305.04613).
'gaia_dr3_MSMS_d200pc.csv' is the sample of wide binaries extracted from Gaia DR3 (El-Badry, Rix, & Heintz 2021). It includes all information needed for statistical analyses.
A virtual Newtonian sample 'Newton_dr3_MSMS_d200pc_1.csv' was generated with 'make_Newton_sample_gaia.py'. The user can generate his/her own Newtonian sample.
A mass-magnitude (and inverse) relation is needed as an input. Three options are provided.
'accel_plane_ortho_wb.py' can be used to produce figures from one Monte Carlo set. The user is encouraged to start with this code to have a feel for what is going on.
'run_wb.py', based on the python class 'accel_ortho_wb.py', calculates an ensemble of Monte Carlo sets of accelerations. It uses 'multiprocessing' and requires a significant number of cores. The author has been using 128 cores/threads.
The user is strongly encouraged to read carefully Chae, K.-H. 2023, to be published in the Astrophysical Journal (arXiv:2305.04613) before using these codes.
Questions can be directed to [email protected] or [email protected].
Last updated 2023-06-21.Chae, K.-H. 2023, to be published in the Astrophysical Journal (arXiv:2305.04613
Python scripts to test gravity with the dynamics of wide binary stars
No full textA wide binary sample within 200 pc, a virtual Newtonian sample, and several python scripts are provided to supplement Chae, K.-H. 2023, to be published in the Astrophysical Journal (arXiv:2305.04613).
'gaia_dr3_MSMS_d200pc.csv' is the sample of wide binaries extracted from Gaia DR3 (El-Badry, Rix, & Heintz 2021). It includes all information needed for statistical analyses.
A virtual Newtonian sample 'Newton_dr3_MSMS_d200pc_1.csv' was generated with 'make_Newton_sample_gaia.py'. The user can generate his/her own Newtonian sample.
A mass-magnitude (and inverse) relation is needed as an input. Three options are provided.
'accel_plane_ortho_wb.py' can be used to produce figures from one Monte Carlo set. The user is encouraged to start with this code to have a feel for what is going on.
'run_wb.py', based on the python class 'accel_ortho_wb.py', calculates an ensemble of Monte Carlo sets of accelerations. It uses 'multiprocessing' and requires a significant number of cores. The author has been using 128 cores/threads.
The user is strongly encouraged to read carefully Chae, K.-H. 2023, to be published in the Astrophysical Journal (arXiv:2305.04613) before using these codes.
Questions can be directed to [email protected] or [email protected].
Last updated 2023-06-21.Chae, K.-H. 2023, to be published in the Astrophysical Journal (arXiv:2305.04613
Python scripts to test gravity with the dynamics of wide binary stars
No full text<p>The sample of 81,880 binaries originally published in Version 1 has columns of Gaia `ruwe' values. The ruwe values were not used in Chae (2023) but provided as a matter of including all potentially relevant parameters. Unfortunately, the ruwe values given in the original table were not correctly matched with the stars due to a typo error. Here the corrected table is provided. </p><p>Chae, K.-H. 2023, Astrophysical Journal, 952, 128</p>
<p>Chae, K.-H., 2024, Astrophysical Journal, 960, 114</p>
<p>Chae, K.-H. 2024, arXiv:2402:05720 (submitted to ApJ)</p>
Python scripts to test gravity with the dynamics of wide binary stars
No full text<p>This is version 5 to provide supplementary codes for arXiv:2402.05720.</p>
<p>It also updates the existing codes from the previous versions.</p>
<p>This version should replace the relevant previous versions.</p>
<p>In using `run_wb_v5.py' (an updated code) and `run_vtilde_wb_v5.py' (a new code), scatters of proper motions can be allowed in the Monte Carlo (MC) draw of probabilities of accelerations or normalized velocities. In other words, each MC can take values from normal probability functions rather than the reported most likely values of proper motions in calculating accelerations and normalized velocities. When the sample is less strictly selected as in the `Chae (2023a) sample', tests with simulated data show that alowing scatters can bias the results somewhat. However, in strictly selected samples such as the `pure binary sample' of Chae (2024) or the `new sample' of arXiv:2402.05720 it makes negligible difference to allow scatters or not. The default choice is not to allow the scatters. However, the user can choose either option through the parameter `pm_scatter'.</p>
<p>Required input files (other than one file being uploaded) can be accessed from the previous versions.</p>
<p>Questions can be directed to [email protected] or [email protected].</p>
<p>Last updated 2024-02-13.</p><p>Chae, K.-H. 2023, Astrophysical Journal, 952, 128</p>
<p>Chae, K.-H., 2024, Astrophysical Journal, 960, 114</p>
<p>Chae, K.-H. 2024, arXiv:2402:05720 (submitted to ApJ)</p>
Determining the Optimal Dosage of Dexmedetomidine for Smooth Emergence in Older Patients Undergoing Spinal Surgery: A Study of 44 Cases
No full textBACKGROUND Emergence agitation, or delirium, occurs during early recovery from general anesthesia and involves disorientation, excitation, and uncontrolled physical movements. Dexmedetomidine is an alpha agonist that has sedative, anxiolytic, analgesic, and sympatholytic activities and is used as a continuous infusion to prevent emergence agitation. This study aimed to evaluate patients aged 65 years and older undergoing general anesthesia to determine the 90% effective dose (ED90) of dexmedetomidine continuous intraoperative infusion to prevent emergence agitation. MATERIAL AND METHODS We enrolled 44 patients aged 65 years and older undergoing spinal surgery under general anesthesia. Dexmedetomidine administration commenced 30 minutes before surgery completion, with a predetermined infusion dose (μg/kg/h), without a loading dose. The initial dose was 0.2 μg/kg/h, and subsequent step size was ±0.05 μg/kg/h. We tried to find ED90 of dexmedetomidine using the biased-coin design. Vital signs, extubation quality scores, extubation-related complications, and postoperative outcomes were monitored. RESULTS Dexmedetomidine ED₉₀ for smooth emergence in older patients was 0.34 μg/kg/h. Peri-extubation vital signs remained within 20% of baseline values, without requiring pharmacological intervention. No hypoxia, hypoventilation, or post-extubation agitation occurred. In the recovery room, 1 patient briefly exhibited excitement but quickly calmed. Nine patients initially unresponsive in the recovery room fully awoke and were promptly discharged. CONCLUSIONS For older patients who are vulnerable to adverse effects of anesthetics and opioids, dexmedetomidine enables gentle awakening without adverse vital sign changes, respiratory depression, excessive sedation, or emergence agitation (ED₉₀=0.34 μg/kg/h). Further studies should involve a larger patient cohort, considering diverse medical conditions in older individuals
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Cnicus uninervius H. Lev. et Vaniot, Repert. 2013
No full text19. Cnicus uninervius H. Lév. et Vaniot, Repert. Spec. Nov. Regni Veg. 8: 169, 1910. Isotype: Quelpaert, in herbidis Hannon, 27 IX 1908, N 1021, Taquet.Published as part of Grabovskaya-Borodina, Alisa E., Illarionova, Irina D., Tatanov, Ivan V., Lee, Byoung-Yoon & Lim, Chae Eun, 2013, Type specimens of Korean vascular plants in the Herbarium of the Komarov Botanical Institute (LE), pp. 191-202 in Journal of Species Research 2 (2) on page 193, DOI: 10.12651/JSR.2013.2.2.191, http://zenodo.org/record/812024
Polygonatum taquetii H. Lev. et Vaniot, Repert. 2013
No full text99. Polygonatum taquetii H. Lév. et Vaniot, Repert. Spec. Nov. Regni Veg. 5: 282, 1908 (). Isotype: Quelpaert, in silvis Hallaisan, VI 1907, N 2115, U. Faurie.Published as part of Grabovskaya-Borodina, Alisa E., Illarionova, Irina D., Tatanov, Ivan V., Lee, Byoung-Yoon & Lim, Chae Eun, 2013, Type specimens of Korean vascular plants in the Herbarium of the Komarov Botanical Institute (LE), pp. 191-202 in Journal of Species Research 2 (2) on page 198, DOI: 10.12651/JSR.2013.2.2.191, http://zenodo.org/record/812024
Rubus vaniotii H. Lev. Repert. 2013, Spec. Nov.
No full text*133. Rubus vaniotii H. Lév. Repert. Spec. Nov. Regni Veg. 5: 280, 1908. Isotype: Quelpaert, in sepibus prope Hongno, VI 1907, N 1577, U. Faurie.Published as part of Grabovskaya-Borodina, Alisa E., Illarionova, Irina D., Tatanov, Ivan V., Lee, Byoung-Yoon & Lim, Chae Eun, 2013, Type specimens of Korean vascular plants in the Herbarium of the Komarov Botanical Institute (LE), pp. 191-202 in Journal of Species Research 2 (2) on page 200, DOI: 10.12651/JSR.2013.2.2.191, http://zenodo.org/record/812024
Rubus quelpaertensis H. Lev. Repert. 2013, Spec. Nov.
No full text*132. Rubus quelpaertensis H. Lév. Repert. Spec. Nov. Regni Veg. 5: 280, 1908. Syntype: In dumosis Quelpaert, VII 1907, N 1585, U. Faurie.Published as part of Grabovskaya-Borodina, Alisa E., Illarionova, Irina D., Tatanov, Ivan V., Lee, Byoung-Yoon & Lim, Chae Eun, 2013, Type specimens of Korean vascular plants in the Herbarium of the Komarov Botanical Institute (LE), pp. 191-202 in Journal of Species Research 2 (2) on page 200, DOI: 10.12651/JSR.2013.2.2.191, http://zenodo.org/record/812024
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