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  • IOP Publishing  (8)
  • 1
    Online Resource
    Online Resource
    Life loss per death of respiratory disease attributable to non-optimal temperature: results from a national study in 364 Chinese locations
    IOP Publishing ; 2021
    In:  Environmental Research Letters Vol. 16, No. 3 ( 2021-03-01), p. 035001-
    Details
    In: Environmental Research Letters, IOP Publishing, Vol. 16, No. 3 ( 2021-03-01), p. 035001-
    Abstract: Many studies have linked temperature with respiratory deaths, but epidemiological evidence of temperature-attributable years of life lost (YLL) from respiratory diseases is limited. Daily respiratory YLL rates were calculated using mortality data from 364 locations of China during 2006–2017, and meteorological data were collected for the same period. First, the distributed lag non-linear model (DLNM) was applied to estimate specific temperature-respiratory YLL rate associations in each location. Then multivariable meta-analysis was conducted to pool the location-specific estimates. Finally, we calculated the average life loss per death (LLD) to quantify the respiratory mortality burden of non-optimal temperature. Subgroup analyses were conducted by gender, age, region and cause of death. Inversely J-shaped association was observed between non-optimal temperature and respiratory YLL rate in China. The minimum YLL-rate temperature was 26.9 °C nationwide. An average of 1.37 years (95% CI: 1.06–1.65) LLD was attributable to non-optimal temperatures with 2.06 years (95% CI: 1.57–2.60) for pneumonia, 2.03 years (95% CI: 1.76–2.31) for chronic lower respiratory infections (LRTI), 0.88 years (95% CI: 0.65–1.09) for chronic obstructive pulmonary disease (COPD), most of which was attributed to moderate cold (0.73 years, 95% CI: 0.65–0.80). LLD caused by non-optimal temperature was higher in males, the young, and north China. Exposure to non-optimal temperature increases respiratory YLL rate in China, most of which were attributed to moderate cold. People with respiratory diseases including pneumonia, chronic LRTI and COPD are vulnerable to non-optimal temperature exposure. The result of this study provides useful information to reduce temperature-related respiratory disease burden.
    Type of Medium: Online Resource
    ISSN: 1748-9326
    URL: Article
    DOI: 10.1088/1748-9326/abe06c
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 2255379-4
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  • 2
    Online Resource
    Online Resource
    Developing a novel indicator to estimate years of life lost attributable to temperature variability between neighboring days
    IOP Publishing ; 2020
    In:  Environmental Research Letters Vol. 15, No. 10 ( 2020-10-01), p. 105010-
    Details
    In: Environmental Research Letters, IOP Publishing, Vol. 15, No. 10 ( 2020-10-01), p. 105010-
    Abstract: The evidence is limited for the mortality burden of temperature variability between neighboring days. This study developed a novel indicator to measure temperature variability between neighboring days and quantify its mortality burden. Daily mortality and meteorological data during 2006–2017 from 364 locations across China were collected. We first employed a distributed lag non-linear model and multivariable meta-analysis to investigate the association between the diurnal temperature range (DTR) with the years of life lost (YLL) rate and the association between the nocturnal temperature range (NTR) with the YLL rate. Then, we calculated the weight temperature variability between neighboring days (weight-TVN) based on the attributable YLL rate of the DTR and NTR. The relationship between the weight-TVN and YLL rate was analyzed, and the attributable fraction (AF) of the YLL and weight-TVN related life loss per death was calculated to quantify the mortality burden. Stratified analyses were conducted by region, season, gender, age group and cause of death. The DTR-YLL rate curve and NTR-YLL rate curve were both J-shaped and a higher YLL rate attributable to DTR was observed than NTR. There was a significant association between the weight-TVN and YLL rate. An estimated AF of the weight-TVN was 6.02% (95%CI: 3.71%–8.33%). The average life loss per death due to weight-TVN was 0.93 year (95%CI: 0.57–1.29). Stratification analyses showed that the AFs of weight-TVN were relatively larger in southern China, in the cold season, in the elderly, females and patients with respiratory illnesses. Although the AF of weight-TVN among the young group (AF = 4.74%, 95%CI: 1.79%–7.69%) was lower than for the elderly (AF = 6.06%, 95%CI: 3.72%–8.41%), weight-TVN related life loss per death among the young population (1.51, 95%CI: 0.57–2.45) was much higher than in the elderly (0.59, 95%CI: 0.36–0.82). A novel indicator to measure temperature variability between neighboring days was developed, and temperature fluctuation between adjacent days significantly increased the mortality burden. Our results indicate that more attention should be paid to short-term temperature fluctuation.
    Type of Medium: Online Resource
    ISSN: 1748-9326
    URL: Article
    DOI: 10.1088/1748-9326/abb10c
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 2255379-4
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  • 3
    Online Resource
    Online Resource
    The association between maternal exposure to fine particulate matter (PM 2.5 ) and gestational diabetes mellitus (GDM): a prospective birth cohort study in China
    IOP Publishing ; 2021
    In:  Environmental Research Letters Vol. 16, No. 5 ( 2021-05-01), p. 055004-
    Details
    In: Environmental Research Letters, IOP Publishing, Vol. 16, No. 5 ( 2021-05-01), p. 055004-
    Abstract: Although previous studies have proposed an association between maternal exposure to fine particulate matter (PM 2.5 ) and the risk of gestational diabetes mellitus (GDM), such evidence remains rare. Additionally, the effects of PM 2.5 on glycemic control in GDM patients are poorly known. In this study, we conducted a prospective birth cohort study in China, and aimed to investigate the association between maternal exposure to PM 2.5 and the risk of GDM, identify the susceptible exposure window, and quantify the exposure-response relationships between PM 2.5 and fasting glucose in GDM patients. A spatiotemporal land-use-regression model was used to estimate individual weekly PM 2.5 exposure during pregnancy. A distributed lag nonlinear model incorporated with a Cox proportional hazard model was used to estimate the association between maternal exposure to PM 2.5 and the risk of GDM. Among the 4174 pregnant women in our study, 1018 (24.4%) were diagnosed with GDM. Each 10 μ g m −3 increment in PM 2.5 exposures during the 24th gestational week was significantly associated with a higher risk of GDM [hazard ratio (HR) = 1.03, 95% CI (confidence interval): 1.01, 1.06]. Compared to the lowest quartile (Q1) of PM 2.5 exposure, participants with the highest quartile (Q4) during the 21st–24th gestational weeks had a higher risk of GDM, and the strongest association was observed in the 22nd gestational week (HR = 1.15, 95%Cl: 1.02, 1.28). The mean PM 2.5 exposures during the 21st–24th weeks were positively associated with fasting plasma glucose in pregnant women with GDM. Each 10 μ g m −3 increase in the mean PM 2.5 exposure was associated with a 0.07 mmol l −1 (95% CI: 0.04, 0.11 mmol l −1 ) increase in the fasting glucose level. Our findings suggest that maternal exposure to higher PM 2.5 during pregnancy may increase the risk of GDM, and result in poor glycemic control among pregnant women with GDM. The 21st–24th gestational week period might be the (most)? susceptible exposure window of PM 2.5 .
    Type of Medium: Online Resource
    ISSN: 1748-9326
    URL: Article
    DOI: 10.1088/1748-9326/abe4f8
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 2255379-4
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  • 4
    Online Resource
    Online Resource
    Automatic seepage detection in cable tunnels using infrared thermography
    IOP Publishing ; 2019
    In:  Measurement Science and Technology Vol. 30, No. 11 ( 2019-11-01), p. 115902-
    Details
    In: Measurement Science and Technology, IOP Publishing, Vol. 30, No. 11 ( 2019-11-01), p. 115902-
    Type of Medium: Online Resource
    ISSN: 0957-0233 , 1361-6501
    URL: Article
    DOI: 10.1088/1361-6501/ab30d9
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2019
    detail.hit.zdb_id: 1362523-8
    detail.hit.zdb_id: 1011901-2
    SSG: 11
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  • 5
    Online Resource
    Online Resource
    Experimental Study on the Characteristics of Air Voids of Asphalt Mixture under Vacuum Compaction
    IOP Publishing ; 2021
    In:  IOP Conference Series: Earth and Environmental Science Vol. 719, No. 3 ( 2021-04-01), p. 032069-
    Details
    In: IOP Conference Series: Earth and Environmental Science, IOP Publishing, Vol. 719, No. 3 ( 2021-04-01), p. 032069-
    Abstract: In order to improve the compaction quality of asphalt mixture, a vacuum compaction technology is studied. Under different vacuum degrees (0 MPa, -0.04 MPa, -0.06 MPa, -0.08 MPa and negative pressure), the vacuum compaction process was used to prepare asphalt mixture samples and their characteristics of air voids were tested. The test results show, when the vacuum degree increases from 0 to -0.08 MPa, the air voids decrease with the increase of vacuum degree. The middle and upper air voids are small, and between 9-25 layers, average air voids under vacuum degree of -0.08 MPa and negative pressure is 13.2%, which is 41.6% lower than that under non vacuum; The average diameter is controlled at 1.88∼2.19 mm under vacuum degree of 0.08 MPa and negative pressure, which is 43.3% less than that under non vacuum. Those results show that vacuum compaction can effectively improve the characteristics of micro air voids of asphalt mixture, which will also improve the compactness.
    Type of Medium: Online Resource
    ISSN: 1755-1307 , 1755-1315
    URL: Article
    DOI: 10.1088/1755-1315/719/3/032069
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 2434538-6
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  • 6
    Online Resource
    Online Resource
    Ultra-high polarity ceramics induced extrinsic high permittivity of polymers contributing to high permittivity of 2–2 series composites
    IOP Publishing ; 2018
    In:  Materials Research Express Vol. 5, No. 1 ( 2018-01-18), p. 015311-
    Details
    In: Materials Research Express, IOP Publishing, Vol. 5, No. 1 ( 2018-01-18), p. 015311-
    Type of Medium: Online Resource
    ISSN: 2053-1591
    URL: Article
    DOI: 10.1088/2053-1591/aaa4e6
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2018
    detail.hit.zdb_id: 2760382-9
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  • 7
    Online Resource
    Online Resource
    Porosity effect on the mechanical properties of nano-silver solder
    IOP Publishing ; 2023
    In:  Nanotechnology Vol. 34, No. 16 ( 2023-04-16), p. 165701-
    Details
    In: Nanotechnology, IOP Publishing, Vol. 34, No. 16 ( 2023-04-16), p. 165701-
    Abstract: Nano-silver has the characteristics of low-temperature sintering and high-temperature service, which can reduce the thermal stress in the packaging process. Because of the high melting point and good high-temperature mechanical properties, silver is widely used in high-temperature packaging and connection fields. Sintered nano-silver has a porous structure on the microscopic level, it is necessary to study the mechanical properties of nano-silver with porosity. In this paper, we proposed a method for finite element modeling of porous nano-silver. Finite element analysis and nanoindentation test were used to investigate the Young’s modulus of nano-silver. At the same time, and the quadratic equation of porosity and Young’s modulus was fitted, and it was verified by Ramakrishnan model and nanoindentation results. These results show that the Young’s modulus of nano-silver decreases with the increase of internal porosity, and the Young’s modulus and porosity show a quadratic function correlation. As the porosity increases, the Young’s modulus of nano-silver decreases at a slower rate. The modeling method presented in this paper can well predict the Young’s modulus of nano-silver.
    Type of Medium: Online Resource
    ISSN: 0957-4484 , 1361-6528
    URL: Article
    DOI: 10.1088/1361-6528/acb4f3
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2023
    detail.hit.zdb_id: 1362365-5
    SSG: 11
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  • 8
    Online Resource
    Online Resource
    Deformation mechanism of copper reinforced by three-dimensional graphene under torsion and tension
    IOP Publishing ; 2022
    In:  Modelling and Simulation in Materials Science and Engineering Vol. 30, No. 2 ( 2022-03-01), p. 025004-
    Details
    In: Modelling and Simulation in Materials Science and Engineering, IOP Publishing, Vol. 30, No. 2 ( 2022-03-01), p. 025004-
    Abstract: The mechanical behaviors of uniaxial torsional and tensional copper nanorod embedded with sp 2 -type hybrid graphene nanosheets (3DG/Cu) were investigated systematically using molecular dynamics methods. During the torsion process, graphene expanded the plastic deformation region of copper, while the plastic deformation in monocrystalline Cu cases was limited to a smaller area. 3DG/Cu responded to the torsion by one more plastic stage when plastic deformation spread along the length after the elastic response. Graphene improved the torsional loading capacity of the composite material, greatly extending the effective response range of the material by distributing the deformation of copper along with the graphene rather than being concentrated at a certain position like monocrystalline Cu. Generally, as the length of the model increased, this enhancement decreased. The copper portion of 3DG/Cu was divided into three areas during uniaxial tensile, a static region, a quasi-static region of the middle portion where the shear and necking occurred, and a dynamic area near the loading end. However, the inside graphene kept continuous until fracture. Furthermore, graphene improved the yield strain of copper by maintaining intact after copper failure. The greater the pre-loaded torsion angle, the smaller the yield strength and Young’s modulus of 3DG/Cu.
    Type of Medium: Online Resource
    ISSN: 0965-0393 , 1361-651X
    URL: Article
    DOI: 10.1088/1361-651X/ac40d2
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 2001737-6
    SSG: 11
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