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Introduction: It is crucial to identify predictors of mortality in the early stage of acute ischemic stroke for the oldest old (aged ≥80 years) because of their poor overall survival outcomes. However, limited data are available as the oldest old have often been excluded from previous clinical studies. Hence, we aimed to assess the predictive effect of red blood cell distribution width on in-hospital mortality and the dose-response relationship between the red blood cell distribution width and in-hospital mortality in oldest old with acute ischemic stroke. Methods: A retrospective cohort study was performed in two tertiary hospitals. Patients aged ≥80 years admitted due to acute ischemic stroke from January 1, 2014, to January 31, 2020, were included in the study. We divided the eligible patients into 3 groups with tertiles of red blood cell distribution width. Restrictive cubic spline and robust locally weighted regression analysis were performed to test the dose-response relationship between red blood cell distribution width and the in-hospital mortality risk. All-cause in-hospital mortality was the main study outcome. Results: Overall, 606 patients were included in the final analysis. Red blood cell distribution width was categorized into 3 groups (T1: 15.7%). The rationality of this categorization was then validated with restricted cubic spline and robust locally regression smoothing scatterplot, respectively. After adjusting for demographic and clinical features, a higher red blood cell distribution width was independently associated with in-hospital mortality and the hazard ratio (HR) was 3.31 (95% CI 2.47–4.45, p < 0.001). There was a positive dose-response relationship between red blood cell distribution width and mortality risk. Sensitivity analysis identified no conspicuous change in the HR. Conclusions: Red blood cell distribution width may be a valuable and simple measure for predicting in-hospital mortality in oldest old patients with acute ischemic stroke.

Caveolin-1 (Cav-1) is a constitutive structural protein of caveolae in the plasma membrane. It plays an important role in maintaining blood brain barrier (BBB) integrity. In this study, we identified that miR-103-3p, a hypoxia-responsive miRNA, could interact with Cav-1. In endothelial cells, miR-103-3p mimic diminished the expression of Cav-1 and tight junction proteins, which were rescued by the inhibition of miR-103-3p. We found a substantial increase of miR-103-3p and decease of Cav-1 in the rat subarachnoid hemorrhage (SAH) model. Pre-SAH intracerebroventricularly injection of miR-103-3p antagomir relieved Cav-1 loss, sequentially reduced BBB permeability and improved neurological function. Finally, we demonstrated that the salutary effects of miR-103-3p antagomir were abolished in Cav-1 knock-out mice, suggesting that Cav-1 was required for the miR-103-3p inhibition-induced neurovascular protection. Taken together, our findings suggest that the inhibition of miR-103-3p could exert neuroprotective effects through preservation of Cav-1 and BBB integrity, making miR-103-3p a novel therapeutic target for SAH.

The shock and vibration response of a thin cylindrical shell is a complex fluid-structure interaction (FSI) dynamic problem, which is very important to the monitoring of the shell condition and the detection of any shell damage. In this paper, the high-order partial differential equation (PDE) of thin shell motion is derived from the Flugge shell theory, and the vibration response of the cylindrical shell system is obtained by the wave propagation method (WPM). In this study, the surrounding fluid of the shell is considered as an ideal acoustic medium and the Helmholtz equation is used to describe the sound pressure field. Using a combination of the above methods, we are able to observe and summarize the patterns regarding the change of the forced vibration response of a thin cylindrical shell under the FSI condition. As far as the crack is concerned, a local flexibility matrix is constructed according to the facture mechanical principles, a breathing linear spring model (BLSM) is set up to obtain the crack stress and displacement. Thus, not only the vibration response of the cracked fluid-filled cylindrical shell is obtained, but also a damage detection method based on the vibration energy flow is presented. This study comes to the following conclusions regarding the fluid-filled thin cylindrical shell: (1) the displacement response of the shell caused by nonlinear excitations vary significantly in the radial, axial and circumferential directions; (2) the crack on the shell cause both local flexibility and natural frequency to decrease; (3) The normalized input power flows prove to be an effective damage detection method for the shell. This study not only makes meaningful contribution to the research field focusing on the vibration response of fluid-filled thin cylindrical shells, but also offers a practical crack damage detection method for structures under the FSI condition.

Cholinesterase as a sensitive biomarker for prognosis in a variety of conditions but it is rare in stroke studies. The very elderly (≥ 80 years of age) represent the most susceptible group of ischemic stroke. We aimed to determine whether admission serum cholinesterase concentration had any effect on clinical outcome in very elderly patients (individuals aged ≥ 80 years) with acute ischemic stroke. A retrospective record review was conducted in two tertiary university hospitals. Elderly patients aged ≥ 80 years admitted with a diagnosis of acute ischemic stroke from January 1, 2014 to November 30, 2019, who had a cholinesterase concentration drawn, were included. The patients were grouped based on the inflection points of the locally weighted regression and smoothing scatterplot (LOESS) curve between cholinesterase levels and in-hospital mortality (study outcome) with lower concentration as reference group. A total of 612 patients were admitted with a diagnosis of acute ischemic stroke, and 569 met the inclusion criteria. A threshold effect was identified using regression smoothing scatterplot (LOESS), with one cutoff point of 4.0 KU/L. There was a significant difference in-hospital mortality was observed (P

The resuspension of indoor particulate matters caused by people indoor walking could affect indoor air quality and human health. Therefore, it is particularly important to study the resuspension rules of the particulate matters in different indoor environments. The influence of the ground material and the relative humidity on resuspension of the particulate matters were investigated under three kinds of ground materials and three different relative humidity. Results showed that different relative humidity and different ground materials had different effects on the mass concentration of the particulate matters. In addition, different particle sizes had diverse influence on the mass concentration. Compared with low-level loop pile carpet and shaggy carpet, hardwood floor was more conductive to human health which was less likely to cause the resuspension of the particulate matters. At the same time, relative humidity had a great influence on the resuspension of the particulate matters. With the increase of relative humidity, the resuspension rate of fine particulate matters decreased.

Introduction: Anemia is a common condition encountered in acute ischemic stroke, and only a few pieces of evidence has been produced suggesting its possible association with short-term mortality have been produced. The study sought to assess whether admission anemia status had any impact on short-term clinical outcome among oldest-old patients with acute ischemic stroke. Materials and Methods: A retrospective review of Electronic Medical Recording System was performed in 2 tertiary hospitals. Data, from the oldest-old patients aged > = 80 years consecutively admitted with a diagnosis of acute ischemic stroke between January 1, 2015, and December 31, 2019, were analyzed. Admission hemoglobin was used as indicator for anemia and severity. Univariate and multivariate regression analyses were used to compare in-hospital mortality and length of in-hospital stay in different anemia statuses and normal hemoglobin patients. Results: A total of 705 acute ischemic stroke patients were admitted, and 572 were included in the final analysis. Of included patients, 240 of them were anemic and 332 nonanemic patients. A statistical difference between the 2 groups was found in in-hospital mortality (p < 0.001). After adjustment for baseline characteristics, the odds ratio value of anemia for mortality were 3.91 (95% confidence intervals (CI) 1.60–9.61, p = 0.003) and 7.15 (95% CI: 1.46–34.90, p = 0.015) in moderate and severely anemic patients, respectively. Similarly, length of in-hospital stay was longer in anemic patients (21.64 ± 6.17 days) than in nonanemic patients (19.08 ± 5.48 days, p < 0.001). Conclusions: Increased severity of anemia may be an independent risk factor for increased in-hospital mortality and longer length of stay in oldest-old patients with acute ischemic stroke.

We reported a patient who presented with analgesia and thermanaesthesia from the face to T4 dermatome on the contralateral side to the lesion due to infarction of the dorsal tegmentum of the caudal pons, which was inconsistent with classical dorsolateral pontine infarction. We speculated that the lesion affected the trigeminothalamic tract deriving from the second-order neurons on the contralateral side and partial lateral spinothalamic tracts carrying pain and temperature sensation above T4 dermatome, while the spinal trigeminal tract and its nucleus on the ipsilateral side and other parts of lateral spinothalamic tracts were spared. This case showed the atypical presentations of dorsolateral pontine infarction and may provide clinicians with new diagnostic ideas., Neuroscience; Neurology; Public health; Nervous system; Clinical research; Pontine infarction; Uncrossed sensory symptomatology; Segmental sensory disturbance.

Astrocytes, the most numerous cells in the human brain, play a central role in the metabolic homeostasis following hypoxic injury. Caveolin-1 (Cav-1), a transmembrane scaffolding protein, has been shown to converge prosurvival signaling in the central nerve system. The present study aimed to investigate the role of Cav-1 in the hypoxia-induced astrocyte injury. We also examined how Cav-1 alleviates apoptotic astrocyte death. To this end, primary astrocytes were exposed to oxygen-glucose deprivation (OGD) for 6 h and a subsequent 24-h reoxygenation to mimic hypoxic injury. OGD significantly reduced Cav-1 expression. Downregulation of Cav-1 using Cav-1 small interfering RNA dramatically worsened astrocyte cell damage and impaired cellular glutamate uptake after OGD, whereas overexpression of Cav-1 with Cav-1 scaffolding domain peptide attenuated OGD-induced cell apoptosis. Mechanistically, the expressions of Ras-GTP, phospho-Raf, and phospho-ERK were sequestered in Cav-1 small interfering RNA-treated astrocytes, yet were stimulated after supplementation with caveolin peptide. MEK/ERK inhibitor U0126 remarkably blocked the Cav-1-induced counteraction against apoptosis following hypoxia, indicating Ras/Raf/ERK pathway is required for the Cav-1's prosurvival role. Together, these findings support Cav-1 as a checkpoint for the in hypoxia-induced astrocyte apoptosis and warrant further studies targeting Cav-1 to treat hypoxic-ischemic brain injury.

Agricultural mechanization impacts on agricultural productivity and society development far-reaching. The emergence of ASIC (Application Specific Integrated Circuit) provides possibility for full intelligence and automation of agricultural products. Placement is a key step in the physical design of ASIC. Legalization is core task of the detailed placement after global distribution of generous standard cells. It removes cells overlap, aligns them to the sites and places them to their final position. A congestion-length driven legalization algorithm with minimum total movement is presented in this paper. The algorithm takes the total wire-length and congestion as objective and considers the site constraint to legalize cells with minimum movement. It contains series of phases to place cells to their optimal site, like formation, Inter-Row cells distribution and Intra-Row cells overlap elimination. But at the same time, it keeps global placement result and optimizes total wire-length at most. On the ISPD 2011 and DAC 2012 Contest Benchmark Suite, with the official valuation protocol, the routability-driven legalization algorithm outperforms original wirelength-driven algorithm almost every contestant.

Subarachnoid hemorrhage results in significant long-lasting neurologic sequelae. Here, we investigated whether human albumin improves long-term outcomes in experimental subarachnoid hemorrhage and whether neurovascular remodeling is involved in the protection of albumin.Laboratory investigation.Hospital research laboratory.Male Sprague-Dawley rats.Rats underwent subarachnoid hemorrhage by endovascular perforation. Albumin of either 0.63 or 1.25 g/kg was injected IV immediately after the surgery. Modified Garcia test, beam-walking test, novel object recognition, and Morris water maze were employed to determine the behavioral deficits. The effects of albumin on early neurovascular dysfunction and chronic synaptic plasticity were also studied.Both doses of albumin significantly improved the sensorimotor scores (F = 31.277; p = 0.001) and cognitive performance (F = 7.982; p = 0.001 in novel object recognition test; and F = 3.431; p = 0.026 in the latency analysis of Morris water maze test) for at least 40 days after subarachnoid hemorrhage. There were remarkable microvasculature hypoperfusion, intracranial pressure rise, early vasoconstriction, neural apoptosis, and degeneration in subarachnoid hemorrhage rats, with albumin significantly attenuating such neurovascular dysfunction. Furthermore, albumin markedly prevented blood-brain barrier disruption, as indicated by less blood-brain barrier leakage, preserved blood-brain barrier-related proteins, and dampened gelatinase activities. The expressions of key synaptic elements were up-regulated with albumin supplementation in both acute and chronic phases. Accordingly, a higher dendritic spine density was observed in the prefrontal and hippocampal areas of albumin-treated subarachnoid hemorrhage animals.Albumin at low-to-moderate doses markedly improves long-term neurobehavioral sequelae after subarachnoid hemorrhage, which may involve an integrated process of neurovascular remodeling.

In order to solve the problem of rapid turning of missile vertical launch, the thrust vector control of jet vane is designed in this paper. By applying the force analysis to the jet vane, the mathematical model of the missile's pitch motion in the vertical plane is established. At the same time the jet vane controller is designed, which introducing the missile's pitch angle position control and rate control. The simulation results show that the jet vane controller with the PID control rule can make the missile fast turn within one second. The model of jet vane thrust vector control can effectively provide sufficient control torque for a missile's quick turn.

This design of the demodulation system of the wavelength information of the FBG strain sensor was based on data acquisition system of DSP and FPGA, which can realize real-time detection and analysis of the multi-point strain. FBG strain sensor is an optical passive instrument. Through the demodulation analysis of the wavelength drift, the variation of corresponding strain can be calculated. This design includes: the demodulation principle of FBG strain sensor, the components of demodulation system, hardware design and analysis of experimental data.