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  • SAGE Publications  (10)
  • 1
    Online Resource
    Online Resource
    High-Sensitivity Surface-Enhanced Raman Scattering (SERS) Substrate Based on a Gold Colloid Solution with a pH Change for Detection of Trace-Level Polycyclic Aromatic Hydrocarbons in Aqueous Solution
    SAGE Publications ; 2015
    In:  Applied Spectroscopy Vol. 69, No. 5 ( 2015-05), p. 574-579
    Details
    In: Applied Spectroscopy, SAGE Publications, Vol. 69, No. 5 ( 2015-05), p. 574-579
    Abstract: In this study, a gold colloid solution whose parameters were optimized, and without any surfactants, was developed as a surface-enhanced Raman scattering (SERS) substrate for the detection of trace-level polycyclic aromatic hydrocarbons (PAHs). A gold colloid solution with 57 nm gold particles and pH 13 was prepared to be the SERS substrate. It had impressive enhancement that was two orders of magnitude higher than that of a gold colloid solution with 57 nm gold particles and without pH change (pH 6). Even with a compact field-based Raman spectrometer, naphthalene, phenanthrene, anthracene, fluoranthene, and pyrene were detected, with limits of detection at 6.8 nM, 3.4 nM, 1.8 nM, 0.68 nM (680 pM), and 0.44 nM (440 pM), respectively. The significant enhancement was ascribed to an electromagnetic mechanism and a charge-transfer mechanism. Quantitative analyses for these five PAHs in water were also performed. The SERS intensities of PAHs were found to have good linear dependence relations with the concentrations in low concentration. This high-sensitivity, easily prepared substrate offers a promising technology for the quantitative detection of trace-level PAHs.
    Type of Medium: Online Resource
    ISSN: 0003-7028 , 1943-3530
    URL: Article
    DOI: 10.1366/14-07614R
    RVK:
    VA 2367
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2015
    detail.hit.zdb_id: 1474251-2
    SSG: 11
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  • 2
    Online Resource
    Online Resource
    Preparation of gelatin-based hydrogels with tunable mechanical properties and modulation on cell–matrix interactions
    SAGE Publications ; 2021
    In:  Journal of Biomaterials Applications Vol. 36, No. 5 ( 2021-11), p. 902-911
    Details
    In: Journal of Biomaterials Applications, SAGE Publications, Vol. 36, No. 5 ( 2021-11), p. 902-911
    Abstract: Natural polymer material-based hydrogels normally show inferior mechanical stability and strength to bear large deformation and cyclic loading, therefore their applications in food, biomedical and tissue engineering fields are greatly limited. In this study, gelatin-based hydrogels with remarkable stability, as well as tunable mechanical properties, were prepared via a facile method known as the Hofmeister effect. The higher concentration of potassium sulfatesolution resulted in more dehydration and molecular chain folding, thus the treated hydrogels showed significantly improved tensile and compressive modulus, and decreased equilibrium swelling ratio, as revealed by scanning electron microscopy (SEM), Fourier transform infraredspectroscopy (FTIR), and mechanical tests, etc. Additionally, the reinforced hydrogels were recoverable and biocompatible to modulate the proliferation behavior of human umbilical vein endothelial cells. In conclusion, this paper provides a facile reference for tuning mechanical properties of gelatin-based hydrogels and cell-hydrogel interactions, which show potential capacity in tissue engineering and biomedical fields.
    Type of Medium: Online Resource
    ISSN: 0885-3282 , 1530-8022
    URL: Article
    DOI: 10.1177/08853282211018567
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2072559-0
    SSG: 12
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  • 3
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    Conductivity enhancement of poly(amide-imide) composites based on the synergistic effect of poly( o -methoxyaniline) and functionalized multiwalled carbon nanotube
    SAGE Publications ; 2021
    In:  Polymers and Polymer Composites Vol. 29, No. 6 ( 2021-07), p. 672-683
    Details
    In: Polymers and Polymer Composites, SAGE Publications, Vol. 29, No. 6 ( 2021-07), p. 672-683
    Abstract: A series of novel ternary conductive composites have been prepared by incorporating functionalized multiwalled carbon nanotubes (FMWCNTs) into the binary composites of poly(amide-imide) (PAI) and poly( o-methoxyaniline) (POMA) to further improve the conductivity of PAI composites. With increasing the weight ratio of FMWCNTs, the conductivity of PAI/POMA/FMWCNTs ternary composites has been significantly enhanced from 10 −3 S m −1 to 90 S m −1 , much higher than that of the sum of PAI/POMA and PAI/FMWCNTs binary composites. The enhanced conductivity is mainly ascribed from a much more intensive conductive network formed in the PAI/POMA/FMWCNTs ternary composites. It is found that the N–H bending of amide group in the Fourier transform infrared spectrometry spectra is observed at 3298 cm −1 for PAI, 3296 cm −1 for PAI/POMA binary composites, and further blue shifted to 3292 cm −1 for PAI/POMA/FMWCNTs ternary composites. Moreover, the glass transition temperature has been increased from 82.5°C to 117.7°C. These results suggested that the hydrogen bonding interaction has been strengthened among PAI, POMA, and FMWCNTs, which is useful for dispersion of condcutive fillers into the polymer matrix.
    Type of Medium: Online Resource
    ISSN: 0967-3911 , 1478-2391
    URL: Article
    DOI: 10.1177/0967391120930970
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2099644-5
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  • 4
    Online Resource
    Online Resource
    Augmented reality for next generation infrastructure inspections
    SAGE Publications ; 2021
    In:  Structural Health Monitoring Vol. 20, No. 4 ( 2021-07), p. 1957-1979
    Details
    In: Structural Health Monitoring, SAGE Publications, Vol. 20, No. 4 ( 2021-07), p. 1957-1979
    Abstract: This article introduces the use of emerging augmented reality technology to enable the next generation of structural infrastructure inspection and awareness. This work is driven by the prevalence of visual structural inspection. It is known that current visual inspection techniques have multiple sources of variance that should be reduced in order to achieve less ambiguous visual inspections. Emerging augmented reality tools feature a variety of sensors, computation, and communication resources that can enable relevant structural inspection data to be collected at very high resolution in an unambiguous manner. This work shows how emerging augmented reality tools can be used to greatly enhance our ability to capture comprehensive, high-resolution, three-dimensional measurements of critical infrastructure. This work also provides detailed information on the software architecture for augmented reality structural inspection applications that helps meet the goals of the framework. The fact that the framework is designed to accommodate the considerations associated with high-consequence infrastructure implies that it is also comprehensive enough to be applied to less hazardous but still high-value infrastructure such as bridges, dams, and tunnels. Augmented reality has great potential to enable the next generation of smart infrastructure, and this work focuses on addressing how augmented reality can be leveraged to enable the next generation of structural awareness for high-consequence, long-lifespan structures.
    Type of Medium: Online Resource
    ISSN: 1475-9217 , 1741-3168
    URL: Article
    DOI: 10.1177/1475921720953846
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2101420-6
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  • 5
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    Predictive controller design for electromagnetic suspension based on mixed logical dynamical model
    SAGE Publications ; 2012
    In:  Journal of Vibration and Control Vol. 18, No. 8 ( 2012-07), p. 1165-1176
    Details
    In: Journal of Vibration and Control, SAGE Publications, Vol. 18, No. 8 ( 2012-07), p. 1165-1176
    Abstract: In this paper, a mathematical model for the developed electromagnetic suspension actuator is established using measured parameters and test data. A main/inner-loop control structure is proposed for its active control where the inner loop undertakes the control of a three-phase motor and applies hysteresis current control method to track the calculated signal by the main loop. With the simplification of the inner-loop control system, an achievable range of control current is acquired. Then, due to the nonlinear damping characteristic of the actuator, a mixed logical dynamical model is built up for the vehicle system and the optimal control to improve vehicle ride comfort is carried out based on the model predictive control method. Simulations are carried out using random uneven road inputs and the results demonstrate that the electromagnetic suspension with the proposed controller can provide better vehicle ride comfort compared with a corresponding passive suspension.
    Type of Medium: Online Resource
    ISSN: 1077-5463 , 1741-2986
    URL: Article
    DOI: 10.1177/1077546311409609
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2012
    detail.hit.zdb_id: 2070247-4
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  • 6
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    μ-Synthesis controller design for a DC-motor-based active suspension with parametric uncertainties
    SAGE Publications ; 2013
    In:  Journal of Vibration and Control Vol. 19, No. 4 ( 2013-03), p. 585-604
    Details
    In: Journal of Vibration and Control, SAGE Publications, Vol. 19, No. 4 ( 2013-03), p. 585-604
    Abstract: This paper presents a µ-synthesis controller design method for a DC-motor-based active suspension. Considering multiple parametric uncertainties, a full-car suspension model with DC-motor actuator is built up and a µ-synthesis controller is proposed for the perturbed suspension system. Both frequency and time domain simulations are conducted, and results show that the µ-synthesis controller achieves better performance in ride comfort compared with H∞ controller. Analyses of robust stability and robust performance have been done, indicating that the µ-synthesis controller is able to maintain both of them, which is also validated by a case in this paper. Consequently, it can be concluded that the designed µ-synthesis controller can deal with parametric uncertainties for a DC-motor-based active suspension.
    Type of Medium: Online Resource
    ISSN: 1077-5463 , 1741-2986
    URL: Article
    DOI: 10.1177/1077546311434795
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2013
    detail.hit.zdb_id: 2070247-4
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  • 7
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    Transcribed Ultraconserved Region Uc.242 is a Novel Regulator of Cardiomyocyte Hypertrophy Induced by Angiotensin Ii
    SAGE Publications ; 2021
    In:  Journal of Investigative Medicine Vol. 69, No. 3 ( 2021-03), p. 749-755
    Details
    In: Journal of Investigative Medicine, SAGE Publications, Vol. 69, No. 3 ( 2021-03), p. 749-755
    Abstract: Cardiomyocyte hypertrophy is a response to stress or hormone stimulation and is characterized by an increase of cardiomyocyte size. Abnormal long non-coding RNA (lncRNA) expression profile has been identified in various cardiovascular diseases. Though some lncRNAs had been reported to participate in regulation of cardiac hypertrophy, the universal lncRNA profile of cardiomyocyte hypertrophy had not been established. In the present study, we aimed to identify the differentially expressed lncRNA-mRNA network in angiotensin II-stimulated cardiomyocytes, and screen the potential lncRNAs involved in regulation of cardiomyocyte hypertrophy. The hypertrophic cardiomyocytes were induced by angiotensin II (0.1 μmol/L) for 48 hours. High-throughput microarray analysis combined with quantitative real-time PCR assay were then performed to screen the differentially expressed lncRNAs and mRNAs. A total of 1577 lncRNAs and 496 mRNAs transcripts were identified differentially expressed in hypertrophic cardiomyocytes. Among them, 59 transcribed ultraconserved non-coding RNAs (T-UCRs) were found by evolutionary conservation analysis. Subsequently, the lncRNA-mRNA coexpression network was constructed based on Pearson's correlation analysis results, including 4 T-UCRs and 215 mRNAs. The results revealed that uc.242 was positively interacted with prohypertrophic genes (Hgf and Tnc). Functional study showed that inhibition of uc.242 dramatically decreased hypertrophic marker expression levels and cardiomyocyte surface area under the condition of angiotensin II stimulation. The expression of Hgf and Tnc was also decreased in cardiomyocytes after silencing of uc.242. Summarily, the present study provided crucial clues to explore therapeutic targets for pathological cardiac hypertrophy.
    Type of Medium: Online Resource
    ISSN: 1081-5589 , 1708-8267
    URL: Article
    DOI: 10.1136/jim-2020-001471
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
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  • 8
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    Active suspension robust control based on main/torque-tracking loop structure
    SAGE Publications ; 2013
    In:  Journal of Vibration and Control Vol. 19, No. 8 ( 2013-06), p. 1123-1138
    Details
    In: Journal of Vibration and Control, SAGE Publications, Vol. 19, No. 8 ( 2013-06), p. 1123-1138
    Abstract: This paper presents a robust control method for a direct current (DC)-motor-based active suspension based on main/torque-tracking loop structure. The control structure is divided into two loops. The main loop deals with parametric uncertainties for a full-car suspension model and calculates the demand torque of DC-motors for active control. Several uncertain parameters are taken into consideration and a mixed-μ robust controller is proposed for the main loop. The torque-tracking loop employs the control of a three-phase motor by using hysteresis current control to track the demand torque calculated by the main loop. Simulations are carried out with random road input and bump input. The results demonstrate that the DC-motor-based active suspension with the designed controller can greatly improve vehicle ride comfort in comparison with the corresponding passive one.
    Type of Medium: Online Resource
    ISSN: 1077-5463 , 1741-2986
    URL: Article
    DOI: 10.1177/1077546312441656
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2013
    detail.hit.zdb_id: 2070247-4
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  • 9
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    An adaptive sliding mode fault-tolerant control for semi-active suspensions with magnetorheological dampers based on T-S fuzzy vehicle models
    SAGE Publications ; 2023
    In:  Journal of Vibration and Control Vol. 29, No. 1-2 ( 2023-01), p. 251-264
    Details
    In: Journal of Vibration and Control, SAGE Publications, Vol. 29, No. 1-2 ( 2023-01), p. 251-264
    Abstract: This paper investigates an improved adaptive sliding mode fault-tolerant control strategy for a magnetorheological semi-active suspension system with parametric uncertainties and actuator faults. Using the experimental data collected by a quarter-vehicle test rig, an adaptive-network-based fuzzy inference system is employed to establish a learning-based magnetorheological damper model firstly. The Takagi-Sugeno fuzzy approach is introduced to deal with the uncertainties of sprung mass and pitch rotary inertia and then the corresponding Takagi-Sugeno faulty semi-active suspension system is constructed. An adaptive sliding mode fault-tolerant controller is proposed, in which the magnetorheological damper fault gain is observed by the designed estimation law, and the asymptotical stability of the system is further analyzed. Finally, numerical simulation tests are conducted to demonstrate the effectiveness of the designed control scheme.
    Type of Medium: Online Resource
    ISSN: 1077-5463 , 1741-2986
    URL: Article
    DOI: 10.1177/10775463211046670
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2023
    detail.hit.zdb_id: 2070247-4
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  • 10
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    Preoperative intra-aortic balloon pump inserted in acute myocardial infarction patients without cardiogenic shock undergoing surgical coronary revascularization
    SAGE Publications ; 2020
    In:  Perfusion Vol. 35, No. 2 ( 2020-03), p. 145-153
    Details
    In: Perfusion, SAGE Publications, Vol. 35, No. 2 ( 2020-03), p. 145-153
    Abstract: The benefit of preoperative intra-aortic balloon pump implantation in high-risk cardiac surgery patients is still debated. The role of preoperative intra-aortic balloon pump insertion in acute myocardial infarction patients without cardiogenic shock undergoing off-pump coronary artery bypass grafting remains unknown. This study aimed to determine the efficacy and safety of the preoperative intra-aortic balloon pump insertion in those patients undergoing off-pump coronary artery bypass grafting. Methods: A total of 421 consecutive acute myocardial infarction patients without cardiogenic shock who underwent isolated off-pump coronary artery bypass grafting were enrolled in this retrospective observational propensity score–matched analysis study. Patients who received intra-aortic balloon pump before off-pump coronary artery bypass grafting (the intra-aortic balloon pump group, n = 157) were compared with those who had not (control group, n = 264). The 30-day postoperative survival, postoperative complications, and postoperative hospital length of stay were compared between the two groups. Results: A total of 99 pairs of patients were matched. The preoperative intra-aortic balloon pump did not show a 30-day postoperative survival benefit compared with the control group (hazard ratio, 0.9; 95% confidence interval, 0.2-4.2; p = 0.92). Patients with preoperative intra-aortic balloon pump were more likely to have shorter postoperative lengths of stay (8 (6-11) days vs. 10 (6-15) days, p = 0.02) and decreased total days in the hospital (median days: 18.2 vs. 21.8, p = 0.02) compared to patients without balloon pumps. Conclusion: Preoperative intra-aortic balloon pump insertion in acute myocardial infarction patients without cardiogenic shock undergoing off-pump coronary artery bypass grafting improved convalescence as shown by significantly shorter postoperative lengths of hospital stay.
    Type of Medium: Online Resource
    ISSN: 0267-6591 , 1477-111X
    URL: Article
    DOI: 10.1177/0267659119865834
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2020
    detail.hit.zdb_id: 2029611-3
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