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  • SAGE Publications  (8)
  • 1
    Online Resource
    Online Resource
    The Patient With Right Atrial Thrombus With a Previous History of Double-Chambered Right Ventricular Surgery and Atrial Fibrillation: A Rare Association
    SAGE Publications ; 2023
    In:  Journal of Investigative Medicine High Impact Case Reports Vol. 11 ( 2023-01), p. 232470962311714-
    Details
    In: Journal of Investigative Medicine High Impact Case Reports, SAGE Publications, Vol. 11 ( 2023-01), p. 232470962311714-
    Abstract: Right atrial thrombosis, which occurs alone, is rare in clinical practice. Its incidence and mechanism are unclear, but susceptibility factors are usually present at its occurrence: ischemic heart disease, heart failure, atrial fibrillation, and chronic kidney disease. Complete isolated right atrial thrombosis rarely occurs. We report here a 47-year-old male patient with a right atrial mass on cardiac ultrasound and chest computed tomography (CT) and a history of previous right heart surgery with type 2 diabetes mellitus and atrial fibrillation, complaining of “chest tightness and shortness of breath after activity for half a month.” The patient was admitted to the hospital and underwent right atrial mass resection, and the postoperative pathology showed “right atrial thrombus.” As right atrial thrombus is very rare and can be a serious threat to life when it occurs in the heart, the prevention and treatment of right atrial thrombus are very important. Based on the analysis of this case, we believe that for patients with special medical history such as “post right heart surgery and atrial fibrillation,” we need to be vigilant for atrial thrombosis.
    Type of Medium: Online Resource
    ISSN: 2324-7096 , 2324-7096
    URL: Article
    DOI: 10.1177/23247096231171471
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2023
    detail.hit.zdb_id: 2710326-2
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  • 2
    Online Resource
    Online Resource
    Reconstruction of conductivity distribution variation with Tikhonov and wavelet frame combined method for electrical impedance tomography
    SAGE Publications ; 2023
    In:  Transactions of the Institute of Measurement and Control Vol. 45, No. 14 ( 2023-10), p. 2658-2668
    Details
    In: Transactions of the Institute of Measurement and Control, SAGE Publications, Vol. 45, No. 14 ( 2023-10), p. 2658-2668
    Abstract: Electrical impedance tomography (EIT) is receiving considerable research interest in a variety of applications. With this technique, it is possible to reconstruct conductivity distribution inside the detected region. Note that reconstruction of conductivity distribution is an ill-posed inverse problem. To deal with this problem, Tikhonov regularization method has been preferred. However, this method suffers from poor reconstruction quality. In this work, a novel approach which combines Tikhonov regularization method with wavelet frame is proposed for image reconstruction of EIT. The proposed method is superior to the popular Tikhonov regularization method in enforcing sparse of the solution and enhancing sharp feature. Simulation work has been conducted to validate the performance of the proposed method. Compared with Landweber method, total variation (TV) regularization method, and Tikhonov regularization method, reconstructions of six different models show that images reconstructed by the proposed method have better quality and are more robust to noise. In addition, image reconstruction is also performed based on phantom experimental data. The results further demonstrate that the proposed method outperforms other three methods since the inclusion has been more accurately reconstructed, and there are almost no artifacts in the reconstructed images.
    Type of Medium: Online Resource
    ISSN: 0142-3312 , 1477-0369
    URL: Article
    DOI: 10.1177/01423312231159216
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2023
    detail.hit.zdb_id: 2025882-3
    SSG: 3,2
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    Online Resource
  • 3
    Online Resource
    Online Resource
    Dynamic modeling of cylindrical roller bearings by considering non-through defects and additional forces
    SAGE Publications ; 2023
    In:  Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics
    Details
    In: Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics, SAGE Publications
    Abstract: Cylindrical roller bearings are essential components in rotating mechanical systems, and ensuring their reliable operation is importance. Accurate modeling of cylindrical roller bearing defects is therefore crucial for enabling effective predictive maintenance strategies in various industries. However, previous studies have overlooked the presence of additional forces that occur when rollers enter and exit non-through defects, leading to inaccuracies in bearing vibration calculations. This work proposes a novel model that captures the bearing vibrations during this process, by considering the defect edge feature of the cylindrical roller bearings. The contact force between the roller and the defective ring is calculated by using the non-ideal Hertzian contact theory, while the additional force is characterized by a time-varying function based on the geometric relationship and Hertzian contact theory. To validate the proposed model, comparison work is carried out between the contact forces calculated using this model and those obtained from existing models, demonstrating the significance of the additional force during the process of rollers entering and exiting non-through defects. Furthermore, the effects of the outer ring defect width, length, and edge angle on cylindrical roller bearing vibrations are investigated and discussed. Compared with the previous studies, this work considers both the additional forces caused by the defect and defect edge feature, and combines the non-ideal Hertzian contact theory to obtain a more reasonable dynamic of the defective cylindrical roller bearings.
    Type of Medium: Online Resource
    ISSN: 1464-4193 , 2041-3068
    URL: Article
    DOI: 10.1177/14644193231189462
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2023
    detail.hit.zdb_id: 2032771-7
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  • 4
    Online Resource
    Online Resource
    China’s metaphorically “othered” image in The New York Times (1949-2020)
    SAGE Publications ; 2023
    In:  Journalism
    Details
    In: Journalism, SAGE Publications
    Abstract: This study investigates, within the framework of Critical Metaphor Analysis, how The New York Times ( NYT) has been metaphorically formulating China as an “other” from 1949 to 2020. Metaphors were identified with reference to Pragglejaz Group’s (2007) Metaphor Identification Procedure. WAR and GAME were detected as dominant concepts, and LIQUID, DISEASE, ANIMAL, MACHINE, and OBSTACLE secondary imagery. It is found that the newspaper’s journalistic values in foreign news reporting and judging criteria toward political leadership have remained radically unchanged. Having been influenced by changes in China-U.S. relations and America’s domestic socio-political ideals, the NYT has been othering China from the civilized world, which tends to be particularly prominent when China’s performance is short of the values and norms preached by the US, and became inconspicuous during China-U.S. alliance. Running counter to its commitment to “truth,” the newspaper employed discursive strategies to balance between America’s moral self-identity and its China policy, and vindicate behaviors identical to those it has been criticizing China for.
    Type of Medium: Online Resource
    ISSN: 1464-8849 , 1741-3001
    URL: Article
    DOI: 10.1177/14648849231200430
    RVK:
    AP 10580
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2023
    detail.hit.zdb_id: 2028959-5
    SSG: 3,5
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  • 5
    Online Resource
    Online Resource
    Effect of hold time on resistance spot weldability of aluminium to steel
    SAGE Publications ; 2022
    In:  Science and Technology of Welding and Joining Vol. 27, No. 7 ( 2022-10-03), p. 522-532
    Details
    In: Science and Technology of Welding and Joining, SAGE Publications, Vol. 27, No. 7 ( 2022-10-03), p. 522-532
    Type of Medium: Online Resource
    ISSN: 1362-1718 , 1743-2936
    URL: Article
    DOI: 10.1080/13621718.2022.2080448
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2022
    detail.hit.zdb_id: 2053754-2
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  • 6
    Online Resource
    Online Resource
    Contact stress analysis for a pair of aluminum matrix composite helical gear and steel worm
    SAGE Publications ; 2015
    In:  Journal of Reinforced Plastics and Composites Vol. 34, No. 3 ( 2015-02), p. 213-221
    Details
    In: Journal of Reinforced Plastics and Composites, SAGE Publications, Vol. 34, No. 3 ( 2015-02), p. 213-221
    Abstract: This paper presents a contact stress analysis for a pair of aluminum matrix composite helical gear and steel worm during rotation. The material of helical gear is 10% SiC particulate-reinforced Al matrix composite. Contact stress analysis for helical gear and worm are performed at different contact positions during rotation based on finite element analysis. Three different conditions are designed to investigate the contact stress of 40Cr, POM and aluminum matrix composite helical gear mesh with worm. Through contrast contact stress between different material helical gear, it was found that the load performance of aluminum matrix composite helical gear is close to steel and better than plastic gear.
    Type of Medium: Online Resource
    ISSN: 0731-6844 , 1530-7964
    URL: Article
    DOI: 10.1177/0731684414566632
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2015
    detail.hit.zdb_id: 2051886-9
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  • 7
    Online Resource
    Online Resource
    A two-stage image reconstruction strategy for electrical impedance tomography
    SAGE Publications ; 2021
    In:  Transactions of the Institute of Measurement and Control Vol. 43, No. 16 ( 2021-12), p. 3625-3632
    Details
    In: Transactions of the Institute of Measurement and Control, SAGE Publications, Vol. 43, No. 16 ( 2021-12), p. 3625-3632
    Abstract: Electrical impedance tomography (EIT) is a potential and promising tomographic technique. Based on a reconstruction strategy, conductivity distribution can be imaged by processing boundary measurements. It should be noticed that the process of image reconstruction involves the solution of a nonlinear ill-posed inverse problem. To tackle this problem, a novel two-stage image reconstruction strategy is proposed in this work. It combines the advantages of total generalized variation regularization method and tight wavelet approach. The solution of the proposed method is acquired by employing alternating minimization algorithm and spilt Bregman algorithm. In the numerical simulation, reconstruction of five models is studied. Aside from the visual observation, we have also validated the proposed method with quantitative comparison. Meanwhile, the impact of noise on the reconstruction is considered. Furthermore, the proposed method is evaluated by phantom experimental data. The simulation and experimental results have demonstrated the superior performance of the proposed method in visualizing conductivity distribution.
    Type of Medium: Online Resource
    ISSN: 0142-3312 , 1477-0369
    URL: Article
    DOI: 10.1177/01423312211043045
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2025882-3
    SSG: 3,2
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  • 8
    Online Resource
    Online Resource
    Molecular Dynamics Study of Interaction between Corrosion Inhibitors, Nanoparticles, and Other Minerals in Hydrated Cement
    SAGE Publications ; 2010
    In:  Transportation Research Record: Journal of the Transportation Research Board Vol. 2142, No. 1 ( 2010-01), p. 58-66
    Details
    In: Transportation Research Record: Journal of the Transportation Research Board, SAGE Publications, Vol. 2142, No. 1 ( 2010-01), p. 58-66
    Abstract: How NaNO 2 corrosion inhibitors and water molecules interact with nanoparticles and other minerals in hydrated cement is investigated at the nanoscale, with a focus on the dynamic behavior of inhibitors in the pore solution at different length and timescales. Representative minerals in hydrated cement (ettringite, Friedel's salt, jennite, kuzelite, portlandite, and tobermorite) and nanoparticles (Al 2 O 3 , Fe 2 O 3 , SiO 2 , and TiO 2 ) are computationally studied. The parameters for potential functions of NO 2 - necessary to describe interactions are evaluated from inverse parameterization. The focus is on the structure of nanoparticles, minerals, and water molecules near the solution–solid interface. Information on interactions of aqueous species with their surroundings is retrieved by molecular dynamics simulations, which provide insight into dynamic behaviors around the solution–solid interfaces. Further analysis reveals that the solid surfaces have a strong effect on the dynamic behaviors of corrosion inhibitors.
    Type of Medium: Online Resource
    ISSN: 0361-1981 , 2169-4052
    URL: Article
    DOI: 10.3141/2142-09
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2010
    detail.hit.zdb_id: 2403378-9
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