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Locked nailing for the treatment of displaced articular fractures of the calcaneus: description of a new procedure with Calcanail. Answer to Xin Wang, Jia-qian Zhou, Guang-rong Yu
2012
European Journal of Orthopaedic Surgery & Traumatology
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Transition from Control to Elimination
[chapter]
2014
Advances in Parasitology
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Ru-Bo Wang et al.
Malaria Control and Elimination Program in the People's Republic ofChina, First Edition, 2014, 289-318 ...
doi:10.1016/b978-0-12-800869-0.00011-1
pmid:25476889
fatcat:owdflq27xze25i4ympyd5djztm
"Predictors of mortality for patients with COVID-19 pneumonia caused by SARS-CoV-2: a prospective cohort study." Rong-Hui Du, Li-Rong Liang, Cheng-Qing Yang, Wen Wang, Tan-Ze Cao, Ming Li, Guang-Yun Guo, Juan Du, Chun-Lan Zheng, Qi Zhu, Ming Hu, Xu-Yan Li, Peng Peng and Huan-Zhong Shi. Eur Respir J 2020; 55: 2000524
2020
European Respiratory Journal
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the description that originally read: "Univariate and multivariate logistic regression analysis revealed that age ⩾65 years (OR 3.765, 95% CI 1. 146-17.394; p=0.023), pre-existing concurrent cardiovascular or cerebrovascular diseases (OR 2.464, 95% CI 0.755-8.044; p=0.007), CD3 + CD8 + T-cells ⩽75 cells·μL −1 (OR 3.982, 95% CI 1.132-14.006; p<0.001) and cardiac troponin I ⩾0.05 ng·mL −1 (OR 4.077, 95% CI 1.166-14.253; p<0.001) were associated with an increase in risk of mortality from COVID-19
doi:10.1183/13993003.50524-2020
pmid:32973076
fatcat:ty4ifiscynfyjnfixb6aellr4e
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... neumonia." has been corrected to: "Univariate and multivariate logistic regression analysis revealed that age ⩾65 years (OR 3.765, 95% CI 1.201−11.803; p=0.023), pre-existing concurrent cardiovascular or cerebrovascular diseases (OR 2.464, 95% CI 1.279−4.747; p=0.007), CD3 + CD8 + T-cells ⩽75 cells·μL −1 (OR 3.982, 95% CI 1.761-9.004; p<0.001) and cardiac troponin I ⩾0.05 ng·mL −1 (OR 4.077, 95% CI 1.778-9.349; p<0.001) were associated with an increase in risk of mortality from COVID-19 pneumonia." The table has also been amended and re-formatted for clarity. The new version is reproduced below. In the Methods section, the sentence that originally read: "The information for all patients, including demographic data, clinical characteristics, laboratory parameters and outcomes, were collected prospectively." Has been corrected to: "The information for all patients, including demographic data, clinical characteristics, laboratory parameters and outcomes, were collected prospectively upon hospital admission." In the Discussion section, the sentences that originally read: "As of midnight on 24 March 2020, the numbers of Chinese confirmed COVID-19 pneumonia cases and deaths were 81 218 and 3281, respectively, indicating that the overall death rate from COVID-19 pneumonia was 4% [17]." and "As mentioned, the overall death rate from COVID-19 pneumonia was 4% [17], and most deceased patients were older people with underlying illness [8][9][10]." Have been corrected to: "As of midnight on 24 March 2020, the numbers of Chinese confirmed COVID-19 pneumonia cases and deaths were 81 218 and 3281, respectively, indicating that the confirmed case fatality rate from COVID-19 pneumonia was 4% [17]." and "As mentioned, the confirmed case fatality rate from COVID-19 pneumonia was 4% [17], and most deceased patients were older people with underlying illness [8][9][10]." References 1 Yang H-J, Zhang Y-M, Yang M, et al.
FLCD: A Flexible Low Complexity Design of Coded Distributed Computing
[article]
2020
arXiv
pre-print
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We propose a flexible low complexity design (FLCD) of coded distributed computing (CDC) with empirical evaluation on Amazon Elastic Compute Cloud (Amazon EC2). CDC can expedite MapReduce like computation by trading increased map computations to reduce communication load and shuffle time. A main novelty of FLCD is to utilize the design freedom in defining map and reduce functions to develop asymptotic homogeneous systems to support varying intermediate values (IV) sizes under a general MapReduce
arXiv:2008.05631v1
fatcat:fobxpdd4vrduxmk4zoyczncxnq
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... framework. Compared to existing designs with constant IV sizes, FLCD offers greater flexibility in adapting to network parameters and significantly reduces the implementation complexity by requiring fewer input files and shuffle groups. The FLCD scheme is the first proposed low-complexity CDC design that can operate on a network with an arbitrary number of nodes and computation load. We perform empirical evaluations of the FLCD by executing the TeraSort algorithm on an Amazon EC2 cluster. This is the first time that theoretical predictions of the CDC shuffle time are validated by empirical evaluations. The evaluations demonstrate a 2.0 to 4.24x speedup compared to conventional uncoded MapReduce, a 12% to 52% reduction in total time, and a wider range of operating network parameters compared to existing CDC schemes.
Sterols from the Green Alga Ulva australis
2017
Marine Drugs
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Three new sterols, (24R)-5,28-stigmastadiene-3β,24-diol-7-one (1), (24S)-5,28-stigmastadiene-3β,24-diol-7-one (2), and 24R and 24S-vinylcholesta-3β,5α,6β,24-tetraol (3), together with three known sterols (4-6) were isolated from the green alga Ulva australis. The structures of the new compounds (1-3) were elucidated through 1D and 2D nuclear magnetic resonance spectroscopy as well as mass spectrometry. Compounds 4-6 were identified as isofucoterol (4) , 24R,28S and
doi:10.3390/md15100299
pmid:28956835
pmcid:PMC5666407
fatcat:tyzg426x6nerzomyfinthb66ie
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... rol (5), and (24S)-stigmastadiene-3β,24-diol (6) on the basis of spectroscopic data analyses and comparison with those reported in the literature. Compounds 4-6 were isolated from U. australis for the first time. These compounds, together with the previously isolated secondary metabolites of this alga, were investigated for their inhibitory effects on human recombinant aldose reductase in vitro. Of the compounds, 24R,28S and 24S,28R-epoxy-24-ethylcholesterol (5) glycerol, 4-hydroxybenzoic acid, 4-hydroxyphenylacetic acid, and 8-hydroxy-(6E)-octenoic acid weakly inhibited the enzyme, while the three new sterols, 1-3, were almost inactive.
Multi-Omics Profiling Identifies Pathways Associated With CD8+ T-Cell Activation in Severe Aplastic Anemia
2022
Frontiers in Genetics
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., 2012 , Wang et al., 2012) . The original metabolome and proteome data can be found in the Supplementary Materials. ...
doi:10.3389/fgene.2021.790990
pmid:35058969
pmcid:PMC8764265
fatcat:la44hbbwafdonblrbolvg77zle
Optimum multicast of multimedia streams
1999
Computers & Operations Research
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Scope and purpose As multimedia service becomes more widely used through computer networks, conserving network resources becomes increasingly important. Multicast communications can save network bandwidths when delivering data to multiple destinations. Therefore, many researchers have given much attention to multicast routing problems. Most of the multicast routing problems only consider a single multicast session. However, in the real world, several multicast sessions will be broadcast,
doi:10.1016/s0305-0548(98)00075-6
fatcat:5cwvn4jwczbbdbctz7pa2qf2za
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... neously. These multicast sessions will contend for the limited resources (such as bandwidth) of networks. This creates a new network optimization problem which is different from any other multicast routing problem. In this research, we studied an optimal video distribution problem which arises from video on demand (VOD) systems with multiple multicast sessions. We believe that the results are useful for improving video distribution methods in multimedia networks. In addition, this study would be applicable on the field of network flows, especially multicommodity flows. Abstract In a VOD system, multicast is a preferred method for saving network bandwidth. That is, customers requesting the same video program over a small time interval can be arranged in a multicast tree (group), and 0305-0548/99/$ -see front matter 1999 Elsevier Science Ltd. All rights reserved. PII: S 0 30 5-05 4 8 (9 8 )0 0 07 5 -6 then the video server sends a video stream via this tree to customers. In this research, we considered how to arrange a set of multicast trees such that the number of customers served is maximized and the link capacity constraint is maintained. For a directed acyclic graph (DAG), we proposed a branch-and-bound algorithm to solve this problem and the solution method is illustrated by example. Next, we extended the algorithm to find an approximate solution for a general graph case. It is shown, through simulations on randomly generated graphs that the solution for our approximation method is very close to the optimal solution.
Hovering UAV-Based FSO Communications: Channel Modelling, Performance Analysis, and Parameter Optimization
[article]
2021
arXiv
pre-print
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Relay-assisted free-space optical (FSO) communication systems are exploited as a means to mitigate the limiting effects of the turbulence induced atmospheric scintillation. However, conventional ground relays are stationary, and their optimal placement is not always feasible. Due to their mobility and flexibility, unmanned aerial vehicles (UAVs) provide new opportunities for FSO relaying systems. In this paper, a hovering UAV-based serial FSO decode-and-forward relaying system is investigated.
arXiv:2104.05368v1
fatcat:jnq5konqqvbnplzorz3lkd7wdu
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... n the channel modelling for such a system, four types of impairments (i.e., atmospheric loss, atmospheric turbulence, pointing error, and link interruption due to angle-of-arrival fluctuation) are considered. Based on the proposed channel model, a tractable expression for the probability density function of the total channel gain is obtained. Closed-form expressions of the link outage probability and end-to-end outage probability are derived. Asymptotic outage performance bounds for each link and the overall system are also presented to reveal insights into the impacts of different impairments. To improve system performance, we optimize the beam width, field-of-view and UAVs' locations. Numerical results show that the derived theoretical expressions are accurate to evaluate the outage performance of the system. Moreover, the proposed optimization schemes are efficient and can improve performance significantly.
Impaired hippocampal functional connectivity in patients with drug resistant, generalized tonic-clonic seizures
2019
NeuroReport
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The aim of this study was to better understand the imaging features of drug-resistant epilepsy (DRE), especially in idiopathic generalized tonic-clonic seizure (GTCS), as well as to discover the associated mechanisms and functional connectivity (FC). A total of 31 idiopathic generalized epilepsy-GTCS patients and 17 healthy controls were enrolled. For each patient, resting-state functional MRI was performed. After a 12-month follow-up observation, patients were further divided into either
doi:10.1097/wnr.0000000000001262
pmid:31116131
pmcid:PMC6571184
fatcat:ootpqjg5kjdzhczf3kn2h57vse
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... esistant (DR) or drug-sensitive (DS) groups. Compared to the DS group, DR patients had previously received more types of antiepileptic drugs and had taken more types of failed antiepileptic drugs. There were distinct FC changes toward the left thalamus, left putamen, left precuneus, and right precentral gyrus in the left hippocampus between DR and DS patients. FCs in the DR group largely decreased or remained unchanged, while DS patients exhibited compensatory enhancement. Disease duration was negatively correlated with FC between the left hippocampus and the left thalamus-putamen in patients with DRE. Further, DRE patients had an extremely high area under the curve (0.978) and a cut-off FC between the left hippocampus and thalamus-putamen of 0.282. Together, hippocampal FCs in patients with DR GTCS were impaired and time-dependently correlated with disease duration. Hippocampal FCs in DS patients showed overall compensatory enhancement, which could be used as a sensitive and specific marker to identify and predict DR GTCS.
Lensless Fourier-Transform Terahertz Digital Holography for Full-Field Reflective Imaging
2022
Frontiers in Physics
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Continuous-wave terahertz digital holography (TDH) is a full-field lensless phase imaging approach usually with the coherent THz laser. It has the potential to be applied to nondestructive testing. In order to simplify the reconstruction and utilize the THz radiation with higher efficiency, a full-field reflective lensless Fourier-transform TDH (RLF-TDH) configuration is proposed with oblique illumination mode based on 2.52 THz radiation. A spherical reference beam is generated by a reflective
doi:10.3389/fphy.2021.818130
doaj:475b4021b9274e45ad0a26fa96b98c2f
fatcat:hcls5cxal5c2ha2dj5rsbxwiqu
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... oncave mirror in order to reduce the loss of THz radiation, which is different from other configurations of the same kind. In the reconstruction process, the complex-amplitude image can be obtained by directly applying single Fourier transform to the digital hologram; thus, it is very possible to achieve real-time imaging. A tilted plane correction method is implemented to correct the anamorphism caused by the nonparallel planes between the object and recording plane. The profile information of the object can be measured from the unwrapped, aberration-free phase image. Two reflective gold-coated samples are adopted to demonstrate the validity of the RLF-TDH imaging system.
Epibisdehydroneotuberostemonine J
2013
Acta Crystallographica Section E
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FINET: Fast Inferring NETwork
[article]
2019
bioRxiv
pre-print
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The elastic-net is an extension of LASSO (Wang and Sarwal, 2015) (least absolute shrinkage and selection operator), a penalized regression method for shrinkage and variable selection by minimizing: Lasso ...
doi:10.1101/733683
fatcat:hwfhypnynvh4bpy53dgxv3osom
Tuberostemoamide hemihydrate
2011
Acta Crystallographica Section E
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Key indicators: single-crystal X-ray study; T = 298 K; mean (C-C) = 0.005 Å; R factor = 0.050; wR factor = 0.142; data-to-parameter ratio = 11.7. In the crystal structure of the title compound {systematic name: (1 0 S,2R,2 0 R,3 0 S,6 0 R)-3 0 -ethyl-4-methyl-5H-5 0 -oxa-10 0azaspiro[furan-2,4 0 -tricyclo[8.3.0.0 2,6 ]tridecane]-5,11 0 -dione hemihydrate}, C 17 H 23 NO 4 Á0.5H 2 O, the asymmetric unit contains two molecules of tuberostemoamide with similar conformations and one water molecule.
doi:10.1107/s1600536811043340
pmid:22220066
pmcid:PMC3247448
fatcat:4p2n6ubhxfgr5aqt366gw3esra
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... he tuberostemoamide molecule is composed of one seven-membered ring (A) and three five-membered rings (B, C and D). Ring A exists in a chair conformation, both rings B and C exist in envelope conformations, and ring D is almost planar with a mean deviation of 0.0143 (4) Å in one molecule and 0.0095 (3) Å in the other.. The dihedral angles between the planes of rings C and D are 75.1 (3) in one molecule and 74.5 (3) for the other. The solvent water molecule links the tuberostemoamide molecules through O-HÁ Á ÁO(ketone) hydrogen bonds. Weak C-HÁ Á ÁO interactions are also present, involving both the water molecule and a heterocyclic ether O-atom acceptor. organic compounds o3056 Zhang et al.
Morphology and etch figures of a Yb:YAl3(BO3)4crystal
2009
Journal of Applied Crystallography
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., 2004a,b; Wang et al., 2000; Zhao, Wang, Sun, Hu, Li et al., 2001; Zhao et al., 2003) . ...
Sometimes quartz develops very small faces of a trigonal research papers 412 Shan Rong Zhao et al. Etch figures of Yb:YAl 3 (BO 3 ) 4 J. Appl. ...
doi:10.1107/s002188980901036x
fatcat:dztyysge6fgyhfx74fyfcvtsha
Risk factors associated with the severity of diabetic retinopathy in Qingdao
2018
Guoji Yanke Zazhi
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AIM:To investigate and analyse the prevalence and risk factors associated with diabetic retinopathy severity in Qingdao.METHODS: This survey consisted of the 2 following parts: 2859 community residents aged >60 years old and 4275 patients with T2DM who were older than 30 years old in Qingdao. Ophthalmic examinations were performed on all patients. A questionnaire was used to obtain the patient's age and gender, the duration of diabetes mellitus(DM), glycaemic control and their knowledge of
doi:10.3980/j.issn.1672-5123.2018.7.02
doaj:6b20fd004adb4a3c8a6036005719f13f
fatcat:n6p3w36wv5dqhk3yklcdrgfm7y
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... tic retinopathy(DR). Blood pressure and haemoglobin levels were recorded. All included patients underwent a comprehensive ophthalmic examination that included a fundus examination and retinal photographs and that assigned a grade for the severity of retinopathy according to the Early Treatment Diabetic Retinopathy Study(ETDRS)severity scale. Patients with severe non-proliferative or proliferative diabetic retinopathy and clinically significant macular edema(CSME)required ophthalmic therapy were assigned to the need-treatment group, while the remaining patients with DR were assigned to the need-observation group. Correlation and regression analyses were performed to determine the required-treatment rate and risk factors for DR. Logistic regression models were used to estimate odds ratios(OR)and 95% confidence intervals(CI)after adjustment for age, gender and the duration of diabetes.RESULTS: DR was present in 334(11.68%)of the 2859 community residents aged >60 years old and 1097(25.66%)of the 4275 hospital patients with T2DM, and 48(14.81%)of the residents and 172(15.68%)of the hospital patients required ophthalmic therapy. In univariate and multivariate logistic analyses, factors including the age of the patients(51-60 years old: OR, 1.68; 95%CI, 1.21-1.72; 61-70 years old: OR, 1.55; 95%CI, 1.38-1.76), the duration of diabetes(11-15 years: OR, 2.61; 95%CI, 1.51-4.72; >15 years: OR, 4.15; 95%CI, 2.32-5.77), glycaemic control(medium: OR, 2.51; [...]
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