Kink oscillations,which are frequently observed in coronal loops and prominences,are often accompanied by extreme-ultraviolet(EUV)waves.However,much more needs to be explored regarding the causal relationships between...Kink oscillations,which are frequently observed in coronal loops and prominences,are often accompanied by extreme-ultraviolet(EUV)waves.However,much more needs to be explored regarding the causal relationships between kink oscillations and EUV waves.In this article,we report the simultaneous detection of kink oscillations and EUV waves that are both associated with an X2.1 flare on 2023 March 03(SOL2023-03-03T17:39).The kink oscillations,which are almost perpendicular to the axes of loop-like structures,are observed in three coronal loops and one prominence.One short loop shows in-phase oscillation within the same period of 5.2 min at three positions.This oscillation could be triggered by the pushing of an expanding loop and interpreted as the standing kink wave.Time lags are found between the kink oscillations of the short loop and two long loops,suggesting that the kink wave travels in different loops.The kink oscillations of one long loop and the prominence are possibly driven by the disturbance of the coronal mass ejection(CME),and that of another long loop might be attributed to the interaction of the EUV wave.The onset time of the kink oscillation of the short loop is nearly same as the beginning of an EUV wave.This fact demonstrates that they are almost simultaneous.The EUV wave is most likely excited by the expanding loop structure and shows two components.The leading component is a fast coronal wave,and the trailing one could be due to the stretching magnetic field lines.展开更多
The care of obstetrics patients has improved dramatically over the past few decades.Unfortunately,rates of cesarean section remain high,and decreasing this rate requires close care and follow-up in the prenatal outpat...The care of obstetrics patients has improved dramatically over the past few decades.Unfortunately,rates of cesarean section remain high,and decreasing this rate requires close care and follow-up in the prenatal outpatient setting.Counseling regarding cesarean delivery and vaginal delivery is imperative.Opportunities still exist in helping patients objectively weigh the decision for cesarean delivery versus vaginal delivery.Additional developments have occurred in the intrapartum and the postpartum setting,with an aim to improve patient and neonatal outcomes.Changes have been implemented for patients undergoing cesarean delivery including preoperative and intraoperative treatment of pain,nausea,and vomiting,as well as postoperative care bundles that improve patient outcomes.Innovations have also occurred in the care of postpartum patients after vaginal delivery,again with improvements in patient outcomes.This article summarizes the current evidence,provides care recommendations,and identifies the next steps in improving obstetrics care.展开更多
基金supported by the National Key R&D Program of China 2021YFA1600502(Grant No.2021YFA1600500)the National Natural Science Foundation of China(Grant Nos.11973092,12073081,12003064+4 种基金12333009)supported by the Surface Project of Jiangsu Province(Grant No.BK20211402)Yunnan Key Laboratory of Solar Physics and Space Science(202205AG070009)(Grant No.YNSPCC202207)a collaborative project conducted by the National Astronomical Observatories of CAS,Peking University,Tongji University,Xi’an Institute of Optics and Precision Mechanics of CAS and the Innovation Academy for Microsatellites of CASsupported by the China National Space Administration(CNSA)。
文摘Kink oscillations,which are frequently observed in coronal loops and prominences,are often accompanied by extreme-ultraviolet(EUV)waves.However,much more needs to be explored regarding the causal relationships between kink oscillations and EUV waves.In this article,we report the simultaneous detection of kink oscillations and EUV waves that are both associated with an X2.1 flare on 2023 March 03(SOL2023-03-03T17:39).The kink oscillations,which are almost perpendicular to the axes of loop-like structures,are observed in three coronal loops and one prominence.One short loop shows in-phase oscillation within the same period of 5.2 min at three positions.This oscillation could be triggered by the pushing of an expanding loop and interpreted as the standing kink wave.Time lags are found between the kink oscillations of the short loop and two long loops,suggesting that the kink wave travels in different loops.The kink oscillations of one long loop and the prominence are possibly driven by the disturbance of the coronal mass ejection(CME),and that of another long loop might be attributed to the interaction of the EUV wave.The onset time of the kink oscillation of the short loop is nearly same as the beginning of an EUV wave.This fact demonstrates that they are almost simultaneous.The EUV wave is most likely excited by the expanding loop structure and shows two components.The leading component is a fast coronal wave,and the trailing one could be due to the stretching magnetic field lines.
文摘The care of obstetrics patients has improved dramatically over the past few decades.Unfortunately,rates of cesarean section remain high,and decreasing this rate requires close care and follow-up in the prenatal outpatient setting.Counseling regarding cesarean delivery and vaginal delivery is imperative.Opportunities still exist in helping patients objectively weigh the decision for cesarean delivery versus vaginal delivery.Additional developments have occurred in the intrapartum and the postpartum setting,with an aim to improve patient and neonatal outcomes.Changes have been implemented for patients undergoing cesarean delivery including preoperative and intraoperative treatment of pain,nausea,and vomiting,as well as postoperative care bundles that improve patient outcomes.Innovations have also occurred in the care of postpartum patients after vaginal delivery,again with improvements in patient outcomes.This article summarizes the current evidence,provides care recommendations,and identifies the next steps in improving obstetrics care.
