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Creators/Authors contains: "Ma, Jun"

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  1. ; ; ; ; ; ; ; ; ( , International Journal of Gynecology & Obstetrics)
    Abstract Background

    Myomectomy is the preferred treatment for women with uterine fibroids and fertility requirements. There are three modalities are used in clinical practice for myomectomy: abdominal myomectomy (AM), laparoscopic myomectomy (LM), and robot‐assisted laparoscopic myomectomy (RLM).

     Objectives

    To compare the perioperative and postoperative outcomes of RLM, AM, and LM.

     Search Strategy

    We searched PubMed, Web of Science, Embase, and Clinical Trials for relevant literature published between January 2000 and January 2023.

     Selection Criteria

    We included all studies reporting peri‐ and postoperative outcomes of myomectomy in patients with uterine myomas. Surgical treatments were classified as RLM, LM, or AM.

     Data Collection and Analysis

    Two or more authors selected studies independently, assessed risk of bias, and extracted data. We derived mean difference (MD) or odds ratio (OR) with 95% confidence intervals (CIs) for each outcome, subgrouping trials by the patient characteristics and myoma characteristics. We used theI2statistic to quantify heterogeneity and the random‐effects model for meta‐analysis when appropriate. We used the funnel plot to assess the publication bias.

     Main Results

    A total of 32 studies with 6357 patients were included, of which 1982 women had undergone RLM. The operating time was significantly longer (MD = 43.58, 95% confidence interval [CI]: 25.22–61.93,P < 0.001), and the incidence of cesarean section after myomectomy was significantly lower (OR = 0.27, 95% CI: 0.10–0.78,P = 0.02) in RLM than in LM. Compared with AM, the operation time, blood loss, blood transfusion rate, complication rate, total cost, length of hospital stay, and pregnancy rate of patients with RLM were significantly different.

     Conclusions

    The safety and effectiveness of RLM are superior to those of AM but inferior to those of LM.

     
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  2. ; ; ; ; ; ; ; ; ; ( , International Journal of Applied Earth Observation and Geoinformation)
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  3. ; ; ; ; ; ; ; ; ; ( , Advanced Composites and Hybrid Materials)
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  4. ; ; ; ; ; ; ; ; ; ; et al ( , The Astronomical Journal)
    Abstract

    We present the astrometric calibration of the Beijing–Arizona Sky Survey (BASS). The BASS astrometry was tied to the International Celestial Reference Frame via the Gaia Data Release 2 reference catalog. For effects that were stable throughout the BASS observations, including differential chromatic refraction and the low charge transfer efficiency of the CCD, we corrected for these effects at the raw image coordinates. Fourth-order polynomial intermediate longitudinal and latitudinal corrections were used to remove optical distortions. The comparison with the Gaia catalog shows that the systematic errors, depending on color or magnitude, are less than 2 milliarcseconds (mas). The position systematic error is estimated to be about −0.01 ± 0.7 mas in the region between 30° and 60° of decl. and up to −0.07 ± 0.9 mas in the region north of decl. 60°.

     
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  5. ; ; ; ; ; ( , The Astrophysical Journal Letters)
    Abstract Using proper motions from Gaia Early Data Release 3 (Gaia EDR3) and radial velocities from several surveys, we identify 60 candidate high-velocity stars with a total velocity greater than 75% of the escape velocity that probably originated from the Sagittarius dwarf spheroidal galaxy (Sgr) by orbital analysis. Sgr’s gravity has little effect on the results and the Large Magellanic Cloud’s gravity has a nonnegligible effect on only a few stars. The closest approach of these stars to the Sgr occurred when the Sgr passed its pericenter (∼38.2 Myr ago), which suggests they were tidally stripped from the Sgr. The positions of these stars in the Hertzsprung–Russell diagram and the chemical properties of 19 of them with available [Fe/H] are similar to the Sgr stream member stars. This is consistent with the assumption of their accretion origin. Two of the 60 are hypervelocity stars, which may also be produced by the Hills mechanism. 
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  6. ; ; ; ; ( , The Journal of Physical Chemistry A)
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  7. ; ; ; ; ; ; ( , Chemical Engineering Journal)
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  8. ; ; ; ; ; ( , The Astrophysical Journal)
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  9. ; ; ; ; ; ; ( , Water Research)
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  10. ; ; ; ( , Smart Materials and Structures)