Coastal zones are dynamic interfaces responding to complex natural processes and anthropogenic pressures.Monitoring shoreline evolution is essential for sustainable coastal management,particularly given climate change...Coastal zones are dynamic interfaces responding to complex natural processes and anthropogenic pressures.Monitoring shoreline evolution is essential for sustainable coastal management,particularly given climate change,urban expansion,and sediment flux disruption.This study investigates shoreline changes along Morocco’s northern Atlantic coast from 1990 to 2023,an area of strategic economic importance and environmental vulnerability.Landsat satellite imagery and geospatial techniques,including the Digital Shoreline Analysis System(DSAS v5.1)and the Normalized Difference Water Index(NDWI),provided a high-resolution,diachronic assessment.Shoreline extraction and image enhancement were conducted with ENVI software,and change detection utilized Linear Regression Rate(LRR)and End Point Rate(EPR)indicators.Results revealed significant spatial variability:sectors like northern Moulay Bousselham and Chlihat showed pronounced accretion(+3.2 to+4.7 m/year),while areas such as Tahaddart and southern Mehdia experienced severe erosion(up to−3.4 m/year).The total net eroded area exceeds 58,000 m².Trends correlate strongly with hydrodynamic forces,upstream damming,sediment extraction,and extreme weather events,notably storms in 2014 and 2017.Findings align with studies highlighting compounded effects of sediment starvation and sea-level rise.By integrating remote sensing,time-series analysis,and uncertainty quantification,this research provides insights into the primary drivers of shoreline dynamics,emphasizing the urgent need for adaptive,evidence-based coastal management strategies,including regulation of sand mining,sediment buffer restoration,and soft-engineering solutions.展开更多
Background:Carotid artery pseudoaneurysm in children is rare;typically caused by trauma;surgical interventions and infection.These aneurysms can lead to signiffcant neurological and vascular risks;and their management...Background:Carotid artery pseudoaneurysm in children is rare;typically caused by trauma;surgical interventions and infection.These aneurysms can lead to signiffcant neurological and vascular risks;and their management remains challenging.While endovascular therapy has become the standard for giant pseudoaneurysms in adults;its use in children is limited.No established guidelines or long-term safety data exist for pediatric endovascular treatment.We present a child who developed a carotid artery pseudoaneurysm after venoarterial extracorporeal membrane oxygenation(VA-ECMO)support and heart transplantation;highlighting the management strategies and outcomes.Case Description:A 4-year-old boy with dilated cardiomyopathy was admitted for congestive heart failure and subsequently required VA-ECMO support due to worsening hemodynamics.After heart transplantation;the patient developed a persistent hoarseness and a rapidly enlarging neck mass.Imaging conffrmed the presence of a giant carotid artery pseudoaneurysm.Balloon occlusion-guided digital subtraction angiography(DSA)revealed adequate collateral circulation;allowing successful carotid artery ligation and pseudoaneurysm resection.Postoperative recovery was uneventful;with no neurological deffcits or complications;and regular follow-up conffrmed no further adverse sequelae.Conclusions:Management of carotid artery pseudoaneurysms in pediatric patients remains challenging.Under the guidance of DSA and with the assistance of balloon occlusion;precise aneurysm resection and vascular reconstruction can be achieved.In the event that vascular conditions limit the success of the repair;the balloon’s ability to occlude the parent artery and supplying vessels can safely facilitate the ligation of the parent artery of the aneurysm.展开更多
文摘Coastal zones are dynamic interfaces responding to complex natural processes and anthropogenic pressures.Monitoring shoreline evolution is essential for sustainable coastal management,particularly given climate change,urban expansion,and sediment flux disruption.This study investigates shoreline changes along Morocco’s northern Atlantic coast from 1990 to 2023,an area of strategic economic importance and environmental vulnerability.Landsat satellite imagery and geospatial techniques,including the Digital Shoreline Analysis System(DSAS v5.1)and the Normalized Difference Water Index(NDWI),provided a high-resolution,diachronic assessment.Shoreline extraction and image enhancement were conducted with ENVI software,and change detection utilized Linear Regression Rate(LRR)and End Point Rate(EPR)indicators.Results revealed significant spatial variability:sectors like northern Moulay Bousselham and Chlihat showed pronounced accretion(+3.2 to+4.7 m/year),while areas such as Tahaddart and southern Mehdia experienced severe erosion(up to−3.4 m/year).The total net eroded area exceeds 58,000 m².Trends correlate strongly with hydrodynamic forces,upstream damming,sediment extraction,and extreme weather events,notably storms in 2014 and 2017.Findings align with studies highlighting compounded effects of sediment starvation and sea-level rise.By integrating remote sensing,time-series analysis,and uncertainty quantification,this research provides insights into the primary drivers of shoreline dynamics,emphasizing the urgent need for adaptive,evidence-based coastal management strategies,including regulation of sand mining,sediment buffer restoration,and soft-engineering solutions.
基金Supported by the Scientiffc Research Project of Jiangsu Maternity and Child Health Care Association(FYX202201).
文摘Background:Carotid artery pseudoaneurysm in children is rare;typically caused by trauma;surgical interventions and infection.These aneurysms can lead to signiffcant neurological and vascular risks;and their management remains challenging.While endovascular therapy has become the standard for giant pseudoaneurysms in adults;its use in children is limited.No established guidelines or long-term safety data exist for pediatric endovascular treatment.We present a child who developed a carotid artery pseudoaneurysm after venoarterial extracorporeal membrane oxygenation(VA-ECMO)support and heart transplantation;highlighting the management strategies and outcomes.Case Description:A 4-year-old boy with dilated cardiomyopathy was admitted for congestive heart failure and subsequently required VA-ECMO support due to worsening hemodynamics.After heart transplantation;the patient developed a persistent hoarseness and a rapidly enlarging neck mass.Imaging conffrmed the presence of a giant carotid artery pseudoaneurysm.Balloon occlusion-guided digital subtraction angiography(DSA)revealed adequate collateral circulation;allowing successful carotid artery ligation and pseudoaneurysm resection.Postoperative recovery was uneventful;with no neurological deffcits or complications;and regular follow-up conffrmed no further adverse sequelae.Conclusions:Management of carotid artery pseudoaneurysms in pediatric patients remains challenging.Under the guidance of DSA and with the assistance of balloon occlusion;precise aneurysm resection and vascular reconstruction can be achieved.In the event that vascular conditions limit the success of the repair;the balloon’s ability to occlude the parent artery and supplying vessels can safely facilitate the ligation of the parent artery of the aneurysm.
