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3,990 results on '"Shi, Ke"'

166. Clinical application of a body area network-based smart bracelet for pre-hospital trauma care

Author

Wei Han, Jin-Yang Yuan, Rui Li, Le Yang, Jia-Qin Fang, Hao-Jun Fan, and Shi-Ke Hou

Subjects
wearable electronic devices, body area network, pre-hospital emergency care, trauma, clinical application, Medicine (General), R5-920
Abstract

ObjectiveThis study aims to explore the efficiency and effectiveness of a body area network-based smart bracelet for trauma care prior to hospitalization.MethodsTo test the efficacy of the bracelet, an observational cohort study was conducted on the clinical data of 140 trauma patients pre-admission to the hospital. This study was divided into an experimental group receiving smart bracelets and a control group receiving conventional treatment. Both groups were randomized using a random number table. The primary variables of this study were as follows: time to first administration of life-saving intervention, time to first administration of blood transfusion, time to first administration of hemostatic drugs, and mortality rates within 24 h and 28 days post-admission to the hospital. The secondary outcomes included the amount of time before trauma team activation and the overall length of patient stay in the emergency room.ResultsThe measurement results for both the emergency smart bracelet as well as traditional equipment showed high levels of consistency and accuracy. In terms of pre-hospital emergency life-saving intervention, there was no significant statistical difference in the mortality rates between both groups within 224 h post-admission to the hospital or after 28-days of treatment in the emergency department. Furthermore, the treatment efficiency for the group of patients wearing smart bracelets was significantly better than that of the control group with regard to both the primary and secondary outcomes of this study. These results indicate that this smart bracelet has the potential to improve the efficiency and effectiveness of trauma care and treatment.ConclusionA body area network-based smart bracelet combined with remote 5G technology can assist the administration of emergency care to trauma patients prior to hospital admission, shorten the timeframe in which life-saving interventions are initiated, and allow for a quick trauma team response as well as increased efficiency upon administration of emergency care.

Published
2023
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167. Impact of Functional Mitral Regurgitation on Left Ventricular Strain in Nonischemic Dilated Cardiomyopathy Patients with Type 2 Mellitus Diabetes: A Magnetic Resonance Feature Tracking Study

Author

Shen, Meng‐Ting, primary, Yang, Zhi‐Gang, additional, Guo, Ying‐Kun, additional, Shi, Ke, additional, Jiang, Li, additional, Wang, Jin, additional, Yan, Wei‐Feng, additional, Qian, Wen‐Lei, additional, Shen, Li‐Ting, additional, and Li, Yuan, additional

Published
2024
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169. Improved Finite Difference Results for the Caputo Time-Fractional Diffusion Equation

Author

Davis, Wesley, Noren, Richard, and Shi, Ke

Subjects
Mathematics - Numerical Analysis, 26A33, 45D05, 65M06, 65M15, 65R10
Abstract

We begin with a treatment of the Caputo time-fractional diffusion equation, by using the Laplace transform, to obtain a Volterra intego-differential equation where we may examine the weakly singular nature of this convolution kernel.\iffalse The order of fractional derivative, $\alpha$, is tied to finite difference methods and is of great interest.\fi We examine this new equation and utilize a numerical scheme that is derived in parallel to the L1-method for the time variable and a usual fourth order approximation in the spatial variable. The main method derived in this paper has a rate of convergence of $O(k^{2}+h^4)$ for $u(x,t) \in C^6(\Omega)\times C^2[0,T]$, which improves previous estimates by a factor of $k^{\alpha}$. We also present a novel alternative method for a first order approximation in time, which allows us to relax our regularity assumption to $u(x,t) \in C^6(\Omega)\times C^1[0,T]$, while exhibiting order of convergence slightly less than $O(k^{1+\alpha})$ in time. This allows for a much wider class of functions to be analyzed which was previously not possible under the L1-method. We present numerical examples demonstrating these results and discuss future improvements and implications by using these techniques., Comment: 22 pages, 3 tables, 1 appendix

Published
2018

170. A census of galaxy constituents in a Coma Progenitor observed at z>3

Author

Shi, Ke, Lee, Kyoung-Soo, Dey, Arjun, Huang, Yun, Malavasi, Nicola, Hung, Chao-Ling, Inami, Hanae, Ashby, Matthew, Duncan, Kenneth, Xue, Rui, Reddy, Naveen, Hong, Sungryong, Jannuzi, Buell T., Cooper, Michael C., Gonzalez, Anthony H., Röttgering, Huub J. A., Best, Phillip N., and Tasse, Cyril

Subjects
Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present a detailed census of galaxies in and around PC217.96+32.3, a spectroscopically confirmed Coma analog at z=3.78. Diverse galaxy types identified in the field include Lya emitters (LAEs), massive star-forming galaxies, and ultra-massive galaxies (log (Mstar/Msun)>= 11) which may have already halted their star formation. The sky distribution of the star-forming galaxies suggests the presence of a significant overdensity (delta_g=8+/-2), which is spatially offset from the previously confirmed members by 3-4 Mpc to the west. Candidate quiescent and post-starburst galaxies are also found in large excess (a factor of ~ 8-15 higher surface density than the field) although their redshifts are less certain. We estimate that the total enclosed mass traced by star-forming galaxy candidates is roughly comparable to that of PC217.96+32.3 traced by the LAEs. We speculate that the true extent of PC217.96+32.3 may be larger than previously known, a half of which is missed by our LAE selection. Alternatively, the newly discovered overdensity may belong to another Coma progenitor not associated with PC217.96+32.3. Expectations from theory suggest that both scenarios are equally unlikely (<1%), particularly in the cosmic volume probed in our survey. If confirmed as a single structure, its total mass will be well in excess of Coma, making this a singularly large cosmic structure rarely seen even in large cosmological simulations. Finally, we find that the protocluster galaxies follow the same SFR-M_star scaling relation as the field galaxies, suggesting that the environmental effect at z~4 is a subtle one at best for normal star-forming galaxies., Comment: 21 pages, 11 figures, accepted for publication in Astrophysical Journal

Published
2018
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171. Discovery of a Very Large (~20 kpc) Galaxy at z=3.72

Author

Lee, Kyoung-Soo, Dey, Arjun, Matheson, Thomas, Shi, Ke, Hung, Chao-Ling, Xue, Rui, Inami, Hanae, Huang, Yun, Lee, Khee-Gan, Ashby, Matthew L. N., Jannuzi, Buell, Reddy, Naveen, Hong, Sungryong, Mo, Wenli, and Malavasi, Nicola

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

We report the discovery and spectroscopic confirmation of a very large star-forming Lyman Break galaxy, G6025, at z_spec=3.721+/-0.003. In the rest-frame ~2100A, G6025 subtends ~24 kpc in physical extent when measured from the 1.5-sigma isophote, in agreement with the parametric size measurements which yield the half-light radius of 4.9+/-0.5 kpc and the semi-major axis of 12.5+/-0.1 kpc. G6025 is also very UV-luminous (~5L*(z~4}) and young (~140+/-60 Myr). Despite its unusual size and luminosity, the stellar population parameters and dust reddening (M_star~M*(z~4)$, and E(B-V)=0.18+/-0.05) estimated from the integrated light, are similar to those of smaller galaxies at comparable redshifts. The ground-based morphology and spectroscopy show two dominant components, both located off-center, embedded in more diffuse emission. We speculate that G6025 may be a scaled-up version of chain galaxies seen in deep HST imaging, or alternatively, a nearly equal-mass merger involving two super-L* galaxies in its early stage. G6025 lies close to but not within a known massive protocluster at z=3.78. We find four companions within 6 Mpc from G6025, two of which lie within 1.6 Mpc. While the limited sensitivity of the existing spectroscopy does not allow us to robustly characterize the local environment of G6025, it likely resides in a locally overdense environment. The luminosity, size, and youth of G6025 make it uniquely suited to study the early formation of massive galaxies in the universe., Comment: accepted for publication

Published
2018
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175. A Census of Galaxy Constituents in a Coma Progenitor Observed at z > 3

Author

Shi, Ke, Lee, Kyoung-Soo, Dey, Arjun, Huang, Yun, Malavasi, Nicola, Hung, Chao-Ling, Inami, Hanae, Ashby, Matthew, Duncan, Kenneth, Xue, Rui, Reddy, Naveen, Hong, Sungryong, Jannuzi, Buell T, Cooper, Michael C, Gonzalez, Anthony H, Röttgering, Huub JA, Best, Phillip N, and Tasse, Cyril

Subjects
cosmology: observations, galaxies: clusters: general, galaxies: evolution, galaxies: formation, galaxies: high-redshift, astro-ph.GA, astro-ph.CO, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural), Astronomy & Astrophysics
Abstract

We present a detailed census of galaxies in and around PC 217.96+32.3, a spectroscopically confirmed Coma analog at z = 3.78. Diverse galaxy types identified in the field include Lyα emitters (LAEs), massive star-forming galaxies, and ultramassive galaxies (≳ 10 11 M o ) which may have already halted their star formation. The sky distribution of the star-forming galaxies suggests the presence of a significant overdensity (δ SFG ≈ 8 ±2), which is spatially offset from the previously confirmed members by 3-4 Mpc to the west. Candidate quiescent and post-starburst galaxies are also found in large excess (a factor of ∼8-15 higher surface density than the field's), although their redshifts are less certain. We estimate that the total enclosed mass traced by the candidate star-forming galaxies is roughly comparable to that of PC 217.96+32.3 traced by the LAEs. We speculate that the true extent of PC 217.96+32.3 may be larger than previously known, half of which is missed by our LAE selection. Alternatively, the newly discovered overdensity may belong to another Coma progenitor not associated with PC 217.96+32.3. Expectations from theory suggest that both scenarios are equally unlikely (

Published
2019

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