Dear Editor,We introduce a novel surgical instrument designed to overcome the challenges in draining fluid from the suprachoroidal space in patients with choroidal detachment.In the evolving landscape of ophthalmic su...Dear Editor,We introduce a novel surgical instrument designed to overcome the challenges in draining fluid from the suprachoroidal space in patients with choroidal detachment.In the evolving landscape of ophthalmic surgeries,procedures that were once considered complex,such as those for choroidal detachment,are becoming increasingly common.Drainage of subchoroidal fluid was derived from 1985[1]with indirect visualization during scleral buckle surgery[2-4].展开更多
The aim of the study is to evaluate both environmental damage and saving benefit in selecting building shading devices.The environmental damage from the produc-tion and construction(P&C)of shading devices is evalu...The aim of the study is to evaluate both environmental damage and saving benefit in selecting building shading devices.The environmental damage from the produc-tion and construction(P&C)of shading devices is evaluated.The saving benefit,i.e.,decreasing building operation energy(OE),due to installing shading devices is evaluated.A simple office building module is used.The external shading devices are constructed from concrete-based external shading devices and aluminum-based light shelf devices.Energy design via Life Cycle Energy Assessment(LCEA)and environmental design via Life Cycle Assessments(LCA)are applied.Environmen-tal design is performed when PV energy generation is used.It was found that in energy design,40%of building OE saving benefit is required to compensate energy needed for the P&C of shading devices.In environmental design,100%of the building OE saving benefit is required to compensate for environmental damage stemming from the P&C of shading devices.It was concluded that in energy design,in addition to OE,P&C energy should be evaluated.In environmental design,due to a major reduction in the OE saving benefit,the importance of the P&C environmental damage increased.Environmental design cannot be replaced with energy design when PV energy generation is assumed for building OE needs.展开更多
This study examines the daylight and energy performance of 27 external shading scenarios in a high-rise residential building in the urban tropics.The cooling energy,daytime lighting energy and the spatial daylight aut...This study examines the daylight and energy performance of 27 external shading scenarios in a high-rise residential building in the urban tropics.The cooling energy,daytime lighting energy and the spatial daylight autonomy(sDA)of the building model were simulated in Rhino3D and Grasshopper simulation software.The best per-formance scenario(vertical and horizontal shading on the twentieth floor,horizontal shading only for the eleventh floor and no shading for the second floor)satisfied 75 sDA(300lx|50)with corresponding annual enery performance of 16%-20%in the cardinal directions.The baseline scenario,which is the current practice of providing balconies on all floors,reduced daylight to less than 75 sDA on the eleventh and second floor,even though it had higher annual enery performance(19%-24%)than the best performance scenario.Application of the design principles to a case study indicated that 58%of the spaces had over 75 sDA for both Baseline and Best per-formance scenarios,while an increase in enery performance of 1%-3%was found in the Best performance scenario compared to the Baseline.展开更多
Aim: Maxillofacial surgery has always aimed to find alternative therapies to treat severe maxillary hypoplasia. Distraction osteogenesis of the midface has become the technique with the best functional and aesthetic r...Aim: Maxillofacial surgery has always aimed to find alternative therapies to treat severe maxillary hypoplasia. Distraction osteogenesis of the midface has become the technique with the best functional and aesthetic results. Nevertheless, anchoring a distractor to the middle third of the face continues to involve complex planning. Plus, achieving the desired force vector can sometimes be cumbersome and uncomfortable. The aim of this study is to propose a novel skeletal anchorage technique for the rigid external distractor. Methods:Non-controlled, prospective study of 9 patients with severe midface hypoplasia who were treated with distraction osteogenesis using a rigid external distractor anchored to the infraorbital rims and the bilateral pyriform apertures. The activation phase started the first postoperative day at a rate of 1 mm per day. The consolidation period lasted 6 to 8 weeks. Results: Eight patients achieved the desired distraction objective (24.5 mm on average), with only 1 suffering a 5-mm relapse. None of the patients reported complications. Conclusion:Distraction osteogenesis of the midface by skeletal anchorage is an alternative method when treating patients with severe maxillary hypoplasia. It has significant advantages compared to traditional anchoring because it simplifies the procedure, diminishes the costs and complications.展开更多
基金Supported by Science and Technology Foundation of Tianjin Eye Hospital(No.YKPY2207)Tianjin Key Medical Discipline(Specialty)Construction Project(No.TJYXZDXK-016A).
文摘Dear Editor,We introduce a novel surgical instrument designed to overcome the challenges in draining fluid from the suprachoroidal space in patients with choroidal detachment.In the evolving landscape of ophthalmic surgeries,procedures that were once considered complex,such as those for choroidal detachment,are becoming increasingly common.Drainage of subchoroidal fluid was derived from 1985[1]with indirect visualization during scleral buckle surgery[2-4].
文摘The aim of the study is to evaluate both environmental damage and saving benefit in selecting building shading devices.The environmental damage from the produc-tion and construction(P&C)of shading devices is evaluated.The saving benefit,i.e.,decreasing building operation energy(OE),due to installing shading devices is evaluated.A simple office building module is used.The external shading devices are constructed from concrete-based external shading devices and aluminum-based light shelf devices.Energy design via Life Cycle Energy Assessment(LCEA)and environmental design via Life Cycle Assessments(LCA)are applied.Environmen-tal design is performed when PV energy generation is used.It was found that in energy design,40%of building OE saving benefit is required to compensate energy needed for the P&C of shading devices.In environmental design,100%of the building OE saving benefit is required to compensate for environmental damage stemming from the P&C of shading devices.It was concluded that in energy design,in addition to OE,P&C energy should be evaluated.In environmental design,due to a major reduction in the OE saving benefit,the importance of the P&C environmental damage increased.Environmental design cannot be replaced with energy design when PV energy generation is assumed for building OE needs.
文摘This study examines the daylight and energy performance of 27 external shading scenarios in a high-rise residential building in the urban tropics.The cooling energy,daytime lighting energy and the spatial daylight autonomy(sDA)of the building model were simulated in Rhino3D and Grasshopper simulation software.The best per-formance scenario(vertical and horizontal shading on the twentieth floor,horizontal shading only for the eleventh floor and no shading for the second floor)satisfied 75 sDA(300lx|50)with corresponding annual enery performance of 16%-20%in the cardinal directions.The baseline scenario,which is the current practice of providing balconies on all floors,reduced daylight to less than 75 sDA on the eleventh and second floor,even though it had higher annual enery performance(19%-24%)than the best performance scenario.Application of the design principles to a case study indicated that 58%of the spaces had over 75 sDA for both Baseline and Best per-formance scenarios,while an increase in enery performance of 1%-3%was found in the Best performance scenario compared to the Baseline.
文摘Aim: Maxillofacial surgery has always aimed to find alternative therapies to treat severe maxillary hypoplasia. Distraction osteogenesis of the midface has become the technique with the best functional and aesthetic results. Nevertheless, anchoring a distractor to the middle third of the face continues to involve complex planning. Plus, achieving the desired force vector can sometimes be cumbersome and uncomfortable. The aim of this study is to propose a novel skeletal anchorage technique for the rigid external distractor. Methods:Non-controlled, prospective study of 9 patients with severe midface hypoplasia who were treated with distraction osteogenesis using a rigid external distractor anchored to the infraorbital rims and the bilateral pyriform apertures. The activation phase started the first postoperative day at a rate of 1 mm per day. The consolidation period lasted 6 to 8 weeks. Results: Eight patients achieved the desired distraction objective (24.5 mm on average), with only 1 suffering a 5-mm relapse. None of the patients reported complications. Conclusion:Distraction osteogenesis of the midface by skeletal anchorage is an alternative method when treating patients with severe maxillary hypoplasia. It has significant advantages compared to traditional anchoring because it simplifies the procedure, diminishes the costs and complications.
