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  • SAGE Publications  (99)
  • 2020-2024  (99)
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  • SAGE Publications  (99)
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  • 1
    Online Resource
    Online Resource
    Enhancing the mechanical properties of SCF/PEEK composites in FDM via process-parameter optimization
    SAGE Publications ; 2021
    In:  High Performance Polymers Vol. 33, No. 8 ( 2021-10), p. 914-923
    Details
    In: High Performance Polymers, SAGE Publications, Vol. 33, No. 8 ( 2021-10), p. 914-923
    Abstract: Short-carbon-fiber (SCF)–reinforced poly-ether-ether-ketone (PEEK) is a promising polymer composite material with good biocompatibility, a high strength-to-weight ratio, and low friction properties. In artificial-bone fabrication and other applications with more flexible fabrication demands, fused-deposition modeling (FDM) technology enables the rapid and low-cost fabrication of SCF/PEEK parts with sophisticated structures. Owing to the high viscosity of melting PEEK composites, great challenges, associated with the poor internal interface, need to be overcome before enhanced mechanical properties can be obtained. In this study, key processing parameters and various SCF amounts were studied to investigate their effects on the mechanical properties of PEEK composites. It was revealed that the existence of voids and gaps between the SCF and PEEK led to a decrease in the strength of the composite systems. The FDM processing parameters were tuned to eliminate these defects in the PEEK composites. The tensile strength of the 2% SCF/PEEK sample reached 96.4 MPa, which is comparable to that of PEEK parts prepared by injection molding. Meanwhile, its elastic modulus reached 2.6 GPa, which is 169% higher than that of the bare PEEK sample.
    Type of Medium: Online Resource
    ISSN: 0954-0083 , 1361-6412
    URL: Article
    DOI: 10.1177/09540083211003654
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 1483713-4
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  • 2
    Online Resource
    Online Resource
    Enhanced effects of footwarmer by wearing sandals in winter office: A Swedish case study
    SAGE Publications ; 2021
    In:  Indoor and Built Environment Vol. 30, No. 7 ( 2021-08), p. 875-885
    Details
    In: Indoor and Built Environment, SAGE Publications, Vol. 30, No. 7 ( 2021-08), p. 875-885
    Abstract: Human-centred thermal environment conditioning can guarantee thermal comfort needs of human occupants in their micro-environments by using localized heating/cooling devices. Meanwhile, less intensified thermal conditioning of unoccupied surrounding environments can achieve heating/cooling energy efficiency. The concept was originated from task/ambient conditioning, which was developed for personal comfort systems. Most of the localized heating/cooling devices are workstation based or chair based. Task conditioning would become more closely to targets (human bodies) by using special clothing materials or thermoelectric elements. From thermal physiological viewpoints, thermal stimulus to thermally sensitive body parts may generate better results for not only local thermal comfort but also for whole body thermal comfort. Thermal stimulus to the extremities (feet) has demonstrated good thermal comfort effects. Scandinavians are accustomed to outdoor harsh environments and prefer wearing heavy shoes' outdoors in winter. They have the habit of changing heavy shoes to sandals when entering offices, which give the opportunity to enhance localized heating effects of footwarmers by reducing shoes’ thermal resistance. Climatic chamber tests with 32 Nordic subjects were performed under different indoor ambient heating temperatures with/without the aid of footwarmers. With footwarmers and sandals, indoor heating temperature at 16°C was acceptable, which achieved energy efficient thermal comfort.
    Type of Medium: Online Resource
    ISSN: 1420-326X , 1423-0070
    URL: Article
    DOI: 10.1177/1420326X20913975
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 1482713-X
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  • 3
    Online Resource
    Online Resource
    Evaluating the gas-laden ability of polymer melt under atmospheric conditions using a modified torque rheometer
    SAGE Publications ; 2022
    In:  Journal of Cellular Plastics Vol. 58, No. 2 ( 2022-03), p. 237-261
    Details
    In: Journal of Cellular Plastics, SAGE Publications, Vol. 58, No. 2 ( 2022-03), p. 237-261
    Abstract: To investigate the effects of incorporating gas and the associated influencing factors on polymer melt, a method of evaluating the gas-laden ability using modified rheometric measurements was proposed. In this study, common and widely used thermoplastic materials—polypropylene (PP) and high-density polyethylene (HDPE), and their blends with different weight ratios—were selected, and the rheological properties of neat melt and gas-laden melts were tested using a modified torque rheometer. The foamed samples were also produced using a regular injection-molding machine, and the foamed morphology was examined by scanning electron microscope (SEM). The comparison of rheological curves of neat melt and gas-laden melt indicated that the incorporation of gas influenced the rheological properties of the gas-laden polymer melts as evidenced by a decrease of zero-rotational torque and an increase in the melt flow index. The results also suggested that the gas-laden ability of polymer melt could be evaluated quantitatively by the decay (due to desorption) of gas using the modified rheological measurement method. This study also demonstrated that the gas-laden ability can be used to predict the foaming behavior of polymer melts.
    Type of Medium: Online Resource
    ISSN: 0021-955X , 1530-7999
    URL: Article
    DOI: 10.1177/0021955X21997351
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2022
    detail.hit.zdb_id: 2098525-3
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  • 4
    Online Resource
    Online Resource
    An image fusion algorithm based on iterative wavelet transform for space non-cooperative targets
    SAGE Publications ; 2023
    In:  Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering Vol. 237, No. 10 ( 2023-08), p. 2228-2239
    Details
    In: Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, SAGE Publications, Vol. 237, No. 10 ( 2023-08), p. 2228-2239
    Abstract: Due to the interference of outer space environment, the real image data of non-cooperative targets collected by a single sensor often has problems such as low contrast and insufficient color information display. In this paper, we propose an image fusion method with iterative wavelet transform, which utilizes the respective advantages of visible image and near-infrared image to improve the clarity of space non-cooperative target and retain color information. The dataset in this paper comes from the satellite model group taken by ourselves. Due to different shooting angles and resolutions, we need to carry out accurate registration of near-infrared images and visible light. Therefore, we also propose an improved registration algorithm based on ORB feature matching. In order to verify the effectiveness of the method, other image fusion methods are selected for comparative analysis. The method proposed can preserve texture features and color information of space non-cooperative targets.
    Type of Medium: Online Resource
    ISSN: 0954-4100 , 2041-3025
    URL: Article
    DOI: 10.1177/09544100221143565
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2023
    detail.hit.zdb_id: 2032759-6
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  • 5
    Online Resource
    Online Resource
    Surrogate endpoints for overall survival in anti-programmed death-1 and anti-programmed death ligand 1 trials of advanced melanoma
    SAGE Publications ; 2020
    In:  Therapeutic Advances in Medical Oncology Vol. 12 ( 2020-01), p. 175883592092958-
    Details
    In: Therapeutic Advances in Medical Oncology, SAGE Publications, Vol. 12 ( 2020-01), p. 175883592092958-
    Abstract: We assessed the surrogacy of objective response rate (ORR), disease control rate (DCR) and progression-free survival (PFS) for overall survival (OS) in anti-PD-1/PD-L1 trials of metastatic melanoma through a meta-analysis of randomized controlled trials (RCTs). Methods: PubMed and EMBASE were searched for phase II/III RCTs till June 2019 investigating anti-PD-1/PD-L1 agents. Treatment effect (hazard ratio or odds ratio) on potential surrogates (ORR/DCR/PFS) and OS were collected. At trial level, we assessed the correlation between treatment effect on potential surrogates and OS, weighted by sample size, fixed and random effect models, and calculated the surrogate threshold effect (STE). Sensitivity analyses and leave-one-out cross-validation approach were performed to evaluate the robustness of our findings. Results: We included 8 RCTs (4110 patients; 11 comparisons). We did not identify strong correlations between ORR [coefficient of determination ( R 2 ): 0.09–0.25], DCR (0.41–0.57) and OS. However, we noted a strong correlation between PFS and OS, with R 2 of 0.82 in sample size, 0.75 in fixed effect and 0.72 in random effect model weighting, the robustness of which was further verified by leave-one-out cross-validation approach. Sensitivity analyses with restriction to trials with less than 50% crossover, phase III trials, large trials and first-line trials strengthened the correlation (0.78–0.94). The STE for PFS was 0.78. Conclusions: PFS may be the appropriate surrogate for OS in anti-PD-1/PD-L1 trials of metastatic melanoma. A future anti-PD-1/PD-L1 trial would need less than 0.78 for PFS of the upper limit of confidence interval to predict an OS benefit.
    Type of Medium: Online Resource
    ISSN: 1758-8359 , 1758-8359
    URL: Article
    DOI: 10.1177/1758835920929583
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2020
    detail.hit.zdb_id: 2503443-1
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  • 6
    Online Resource
    Online Resource
    Stress characteristics of double-row glass fiber-reinforced plastic pipe culvert with sand and optimization of load reduction parameters under adverse conditions
    SAGE Publications ; 2021
    In:  Journal of Reinforced Plastics and Composites Vol. 40, No. 3-4 ( 2021-02), p. 103-117
    Details
    In: Journal of Reinforced Plastics and Composites, SAGE Publications, Vol. 40, No. 3-4 ( 2021-02), p. 103-117
    Abstract: In this study, the stress and deformation rules of the double-row fiber-reinforced plastic sand pipes under the two loading methods of single-pipe and double-pipe loading were discussed. First, the indoor full-scale test was used to analyze the single-tube pipe top loading. The 90° measurement point of the loaded pipe and the 270° measurement point of the adjacent pipe were the most unfavorable positions for the stress of the pipeline. Through investigating the influence of cover soil height, load level, and compaction on the mechanical index of the most unfavorable load-bearing measuring point of the pipeline, the height of the overburden is found to be the most significant factor affecting the double-pipe stress system. Second, the numerical calculation model of the stress of the double-row pipeline was established to analyze the stress and deformation of the pipe culvert when the spacing of the double pipe was changed. The results indicated the critical spacing equivalent to the stress of the single pipe was 2.5D. Finally, the numerical method was also used to optimize the parameter of the geogrid at the top of the pipe in the most unfavorable stress state of the double pipe with 550-mm pipe spacing and double-loaded mode.
    Type of Medium: Online Resource
    ISSN: 0731-6844 , 1530-7964
    URL: Article
    DOI: 10.1177/0731684420943297
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2051886-9
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  • 7
    Online Resource
    Online Resource
    Numerical simulation and experimental study of off-axis tensile performance of triaxial woven fabric reinforced rubber composites
    SAGE Publications ; 2021
    In:  Journal of Engineered Fibers and Fabrics Vol. 16 ( 2021-01), p. 155892502110653-
    Details
    In: Journal of Engineered Fibers and Fabrics, SAGE Publications, Vol. 16 ( 2021-01), p. 155892502110653-
    Abstract: In this paper, the off-axis tensile behaviors of triaxial woven fabric reinforced rubber composites (TWFR) was studied experimentally and numerically. The tensile failure morphologies and stress-strain curves of specimens cut at seven different off-axis angles (0°, 15°, 30°, 45°, 60°, 75°, and 90°) were obtained by finite element analysis and experiment. The finite element analysis results were found to be in good agreement with the experimental results. Stress-strain curves indicated the TWFR exhibited nonlinear tensile behavior under off-axial tension loading, and could be divided into the coupling working stage of yarns and rubber matrix in TWFR, and the stressed stage of yarns. Similar tensile properties were observed for specimens cut along the direction of angle bisector of any two sets of adjacent yarns. The tensile failure morphologies indicated that the failure mechanism of TWFR was tensile-shear mixed failure.
    Type of Medium: Online Resource
    ISSN: 1558-9250 , 1558-9250
    URL: Article
    DOI: 10.1177/15589250211065382
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2393988-6
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  • 8
    Online Resource
    Online Resource
    Application of Enhanced Recovery After Surgery in Perioperative Period of Tympanoplasty and Mastoidectomy
    SAGE Publications ; 2021
    In:  Ear, Nose & Throat Journal Vol. 100, No. 10_suppl ( 2021-12), p. 1045S-1049S
    Details
    In: Ear, Nose & Throat Journal, SAGE Publications, Vol. 100, No. 10_suppl ( 2021-12), p. 1045S-1049S
    Abstract: Enhanced recovery after surgery (ERAS) protocols are a series of perioperative care to optimize preoperative preparation, prevent postoperative complications, minimize stress, and speedup recovery. Tympanoplasty and mastoidectomy are common surgical procedures for chronic suppurative otitis media. Objective: To compare the efficacy and safety between ERAS and conventional recovery after surgery in the perioperative period of chronic suppurative otitis media. Methods: From April 2018 to February 2019, a total of 84 patients scheduled for tympanoplasty and/or mastoidectomy due to chronic suppurative otitis media were involved and randomly divided into the ERAS group and the control group. The patients’ preoperative anxiety, postoperative pain, and comfort level were determined by comparing the results of Self-Rating Anxiety Scale (SAS), Visual Analog Scale (VAS) and General Comfort Questionnaire (GCQ). The postoperative complications, postoperative hospital stay, and hospitalization cost were calculated. Results: The ERAS group showed a lower SAS score (30 [28-31.5] vs 35 [30-43] , P 〈 .05], a higher GCQ score (88 [84-100] vs 83 [78.25-92.25], P 〈 .05), and a lower VAS score (0 [0-0] vs 1 [0-2] , P 〈 .05] after surgery. No significant difference ( P 〉 .05) was observed between the ERAS group and the control group in postoperative complications, postoperative hospitalization time, and hospitalization cost, respectively. Conclusion: Enhanced recovery after surgery can reduce pain and improve comfort in the perioperative period of chronic suppurative otitis media.
    Type of Medium: Online Resource
    ISSN: 0145-5613 , 1942-7522
    URL: Article
    DOI: 10.1177/0145561320928222
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2067528-8
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  • 9
    Online Resource
    Online Resource
    Natural flat cocoon materials constructed by eri silkworm with high strength and excellent anti-ultraviolet performance
    SAGE Publications ; 2020
    In:  Journal of Engineered Fibers and Fabrics Vol. 15 ( 2020-01), p. 155892502097865-
    Details
    In: Journal of Engineered Fibers and Fabrics, SAGE Publications, Vol. 15 ( 2020-01), p. 155892502097865-
    Abstract: Eri silkworm is easy to be raised and has high cocoon yield, the cocoon fails to be continuously reeled due to a loose structure, a large part of cocoon coat and an eclosion hole. In this work, a fifth instar larvae of eri silkworm was provided with only a flat cocooning place to spin to produce a flat cocoon, it was fed with the castor leaves sprayed with nano-TiO 2 and graphene oxide (GO), Compared with the flat cocoon obtained without nanomaterials, the silk was not found to change in morphology and structure significantly. Nanomaterials promoted the transformation of the random coil/α-helix conformation of the silk to the β-sheet conformation to a certain extent, which formed a stable crystallization. Thus its strength value could increase by 15%–17%, the ultraviolet protection factor ( UPF) value of the flat cocoon with nanomaterials increased significantly, and the silk obtained made up for the lack of the strength in natural eri silkworm silk and poor resistance to sunlight. The flat cocoon features a stable structure, good formation, uniform thickness, and manual control. It can be directly used as raw material for processing flat textile products, which provides a feasible idea for the high-value utilization of the eri silkworm cocoon.
    Type of Medium: Online Resource
    ISSN: 1558-9250 , 1558-9250
    URL: Article
    DOI: 10.1177/1558925020978652
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2020
    detail.hit.zdb_id: 2393988-6
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  • 10
    Online Resource
    Online Resource
    Measurement of Five Emotions Defined by Traditional Chinese Medicine With a Focus on Preventing Mild Cognitive Impairment
    SAGE Publications ; 2023
    In:  American Journal of Alzheimer's Disease & Other Dementias® Vol. 38 ( 2023-01)
    Details
    In: American Journal of Alzheimer's Disease & Other Dementias®, SAGE Publications, Vol. 38 ( 2023-01)
    Abstract: Objectives: This study aimed to develop a novel Measurement of the Five Emotions (MFE) based on traditional Chinese medicine for assessing cognitive impairment in elderly individuals. Methods: Surveys were collected from 184 participants, over 65 years of age, who were residents of Kyoto City, Japan. The surveys included the Measurement of the Five Emotions (MFE) and the Dementia Assessment Sheet for the Community-based Integrated Care System (DASC-21). Item-total reliability and internal consistency reliability were assessed using Spearman's correlation test and Cronbach's alpha coefficient analysis. Factor analysis was conducted to identify the main factors related to the theoretically constructed emotional reaction patterns. Criterion-related validity was examined by investigating the correlation between the scores of the 2 surveys (MFE and DASC-21). Results: The factor analysis revealed that the final version of MFE consisted of 5 factors, which accounted for a cumulative contribution rate of 57.71%. The Cronbach's alpha coefficient reached .71, indicating satisfactory internal consistency. There was a negative correlation between the MFE and DASC-21 scores with a correlation coefficient of −.3149. Furthermore, when comparing participants with lower cognitive function (DASC-21 score 〉 26) to those with higher cognitive function, MFE subscale scores in the emotions of “Sorrow” and “Thought” were significantly lower, suggesting that these particular emotions are related to cognitive impairment. These findings confirmed the reliability and the construct validity of the MFE. Conclusion: The criterion reliability and validity tests provided evidence for the construct validity of the MFE. The negative correlation (coefficient = −.3149) between MFE scores and DASC-21 scores suggested that MFE can serve as a scale for detecting cognitive impairment.
    Type of Medium: Online Resource
    ISSN: 1533-3175 , 1938-2731
    URL: Article
    DOI: 10.1177/15333175231206022
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2023
    detail.hit.zdb_id: 2235173-5
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