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Silicon-photonics-enabled chip-based 3D printer

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Light(Science & Applications) 2024年第7期13卷 1320-1330页

作者： Sabrina Corsetti Milica Notaros tal Sneh Alex Stafford Zachariah A.Page Jelena Notaros Research Laboratory of Electronics Massachusetts Institute of TechnologyCambridgeMA 02139USA Department of Chemistry The University of Texas at AustinAustinTX 78712USA

Imagine if it were possible to create 3D objects in the palm of your hand within seconds using only a single photonic *** 3D printing has revolutionized the way we create in nearly every aspect of modern society,current 3D printers rely on large and complex mechanical systems to enable layer-by-layer addition of *** limits print speed,resolution,portability,form factor,and material *** there have been recent efforts in developing novel photocuring-based 3D printers that utilize light to transform matter from liquid resins to solid objects using advanced methods,they remain reliant on bulky and complex mechanical *** address these limitations,we combine the fields of silicon photonics and photochemistry to propose the first chip-based 3D *** proposed system consists of only a single millimeter-scale photonic chip without any moving parts that emits reconfigurable visible-light holograms up into a simple stationary resin well to enable non-mechanical 3D ***,we experimentally demonstrate a stereolithography-inspired proof-of-concept version of the chip-based 3D printer using a visible-light beam-steering integrated optical phased array and visible-light-curable resin,showing 3D printing using a chip-based system for the first *** work demonstrates the first steps towards a highlycompact,portable,and low-cost solution for the next generation of 3D printers.

关键词： printer printing visible

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Cavity continuum

Photonics Research 2024年第3期12卷 391-398页

作者： FAN CHENG VLADIMIR SHUVAYEV MARK DOUVIDZON LEV DEYCH tal CARMON School of Electrical Engineering Tel Aviv UniversityTel Aviv 6997801Israel Physics Department Queens College of CUNYFlushingQueensNew York 11367USA Solid State Institute Technion-Israel Institute of TechnologyHaifa 3200003Israel The Graduate Center of CUNY New YorkNew York 10016USA

We experimentally demonstrate and numerically analyze large arrays of whispering gallery *** fluorescent mapping,we measure the spatial distribution of the cavity ensemble’s resonances,revealing that light reaches distant resonators in various ways,including while passing through dark gaps,resonator groups,or resonator *** spatially decays exponentially in the *** practically infinite periodic array of resonators,with a quality factor(Q)exceeding 107,might impact a new type of photonic ensembles for nonlinear optics and lasers using our cavity continuum that is distributed,while having high-Q resonators as unit cells.

关键词： resonator cavity ensemble

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城市秘境深圳招商局历史博物馆及微波山公园

室内设计与装修 2024年第10期 62-69页

作者：无 tal(摄影) URBANUS都市实践不详

招商局成立于清末的1872年,经历了民国和共和国3个时代的跌宕起伏,为迎接150年华诞,选址蛇口微波山建造招商局历史博物馆。微波山原为蛇口一座无名小山头,因山顶上修建了中国第一个商用微波站而得名。都市实践应邀设计招商局历史博物馆。

关键词：历史博物馆微波站招商局都市实践

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中心城区的城市更新——深圳中洲湾

当代建筑 2024年第4期 86-95页

作者：陈川 tal(摄影) 凯达环球

凯达环球(Aedas)历时十年,在毗邻深圳市福田中央商务区的上沙村,打造了深圳市中心最大的城市更新项目之一——中洲湾。在这场从城市空间到生活方式的大型改造项目中,Aedas不只是建筑设计师,还是城市规划师,通过思考这里的过去和未来、... 详细信息

凯达环球(Aedas)历时十年,在毗邻深圳市福田中央商务区的上沙村,打造了深圳市中心最大的城市更新项目之一——中洲湾。在这场从城市空间到生活方式的大型改造项目中,Aedas不只是建筑设计师,还是城市规划师,通过思考这里的过去和未来、存在的问题与发展的机遇,为深圳市提供一个未来城市的范本。项目由3个相邻的地块构成,北部地块为一期,南部两个相邻地块为二期,周边交通网络发达,文化旅游资源丰富。

关键词：城市更新商业综合体双塔门户

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食品和饮料趋势简单和健康满足可持续性

中国会展 2024年第14期 36-43页

作者： Marlene goldman 不详

提供自助餐是给与会者提供选择的一个简单方法。去年在拉斯维加斯举行的SEMA展会上,为SEMA(专业设备市场协会)理事会和网络成员举办了活动。协会策划人员面临的一个关键挑战是在活动期间跟上与会者对食品和饮料的偏好。

关键词：策划人员网络成员自助餐可持续性拉斯维加斯 SEMA 饮料食品

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为生活做预算——规划人员退休计划

中国会展 2024年第8期 32-39页

作者： Marlene goldman 不详

会议和活动可以提供信息和乐趣,但在某些时候,是时候退休了。提前制定计划至关重要。对于会议策划者来说,活动管理的关键之一是要从长远的角度考虑如何在预算范围内制定解决方案。规划者在为个人生活做预算和计划时,包括为自己的退休生... 详细信息

会议和活动可以提供信息和乐趣,但在某些时候,是时候退休了。提前制定计划至关重要。对于会议策划者来说,活动管理的关键之一是要从长远的角度考虑如何在预算范围内制定解决方案。规划者在为个人生活做预算和计划时,包括为自己的退休生活做计划时,也可以利用同样的深谋远虑。可以花多少钱以及如何在预算内生活设定一个框架,这既适用于成功的会议,也适用于个人生活。

关键词：预算范围退休生活深谋远虑规划者策划者退休计划解决方案

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混合型会议活动正在形成一种文化

中国会展 2024年第10期 36-41页

作者： Marlene goldman 不详

在新冠疫情引发的所有趋势中,混合型会议和活动可能会在未来几年持续下去。随着2023年即将结束,许多金融和保险会议策划者很高兴地看到,大多数与会者比以往任何时候都更喜欢亲自参加会议。但是,正如活动现场与会者的活力激发了整个行业... 详细信息

在新冠疫情引发的所有趋势中,混合型会议和活动可能会在未来几年持续下去。随着2023年即将结束,许多金融和保险会议策划者很高兴地看到,大多数与会者比以往任何时候都更喜欢亲自参加会议。但是,正如活动现场与会者的活力激发了整个行业的活力一样,混合选项的灵活性也激发了虚拟人群的活力。问题是,接下来会发生什么?

关键词：策划者活力激发灵活性文化混合型虚拟人群会议

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MMP-9 deficiency accelerates the progress of periodontitis

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Genes & Diseases 2024年第5期11卷 117-121页

作者： Chun-Yan Wan Yixin Yin Xiaoyan Li Meng Meng Liu Graham goldman Li-An Wu Feng Wang Dao-Shu Luo Zhuo Chen Wen-An Xu Stephen Chen Mary MacDougall Merry L.Lindsey Zhi Chen Shuo Chen Department of Endodontics The Affiliated Hospital of Qingdao UniversitySchool of StomatologyQingdao UniversityQingdaoShandong 266003China Department of Developmental Dentistry School of DentistryThe University of Texas Health Science Center at San AntonioSan AntonioTX 78229USA Oral Implantology Center Jinan Stomatological HospitalJinanShandong 250001China Department of Endodontics School and Hospital of StomatologyCheeloo College of MedicineShandong Key Laboratory of Oral Tissue RegenerationShandong Engineering Laboratory for Dental Materials and Oral Tissue RegenerationShandong UniversityJinanShandong 250012China Department of Pediatric Dentistry School of StomatologyThe Fourth Military Medical UniversityXi’anShaanxi 710032China Laboratory of Clinical Applied Anatomy Department of Human AnatomySchool of Basic Medical SciencesFujian Medical UniversityFuzhouFujian 350108China Key Laboratory for Oral Biomedical Research of Zhejiang Province Affiliated Hospital of StomatologyMedical CollegeZhejiang UniversityHangzhouZhejiang 310027China Department of Stomatology Nanfang HospitalSouthern Medical UniversityGuangzhouGuangdong 510515China UBC Faculty of Dentistry University of British ColumbiaVancouverBC V6T 1Z3Canada School of Graduate Studies and Research Meharry Medical College and Research BiologistResearch Service Nashville VA Medical CenterNashvilleTN 37208USA State Key Laboratory Breeding Base of Basic Science of Stomatology(Hubei-MOST) Key Laboratory for Oral Biomedicine of Ministry of Education(KLOBM)School and Hospital of StomatologyWuhan UniversityWuhanHubei 430079China

Periodontitis is a chronic inflammatory disease caused by periodontopathic bacteria that affects periodontal support tissues.1 If left untreated,it results in loss of periodontal attachment and alveolar bone *** one-half of adults in the United States older than 30 years have periodontal disease.2 Though the disease is initiated by bacterial infection,it activates host defense systems that eventually lead to the degradation of the *** periodontitis,the disease progress involves further production of pro-inflammatory mediators such as cytokines,proteolytic enzymes like matrix metalloproteinases(MMPs),and their inhibitors.

关键词： period eventually untreated

Metallurgical Microstructure Complexity in the Electron Beam Welding (EBW) Joint of Ti6246

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Journal of Minerals and Materials Characterization and Engineering 2024年第2期12卷 100-111页

作者： Daniel Moreno Yohanan Nachmana Roei Saraga tal Rokah Denis Panchenco Michael Mansano Elinor Itzhaky Moshe Shapira Beth Shemesh Engines LTD FAA & EASA Beth Shemesh Israel

Electron Beam Welding (EBW) is employed to both melt and unite materials, influencing their thermal history and subsequently determining the microstructure and properties of the welded joint. Welding Titanium alloys involves undergoing local melting and rapid solidification, subjecting the material to thermal stresses induced by a thermal expansion coefficient of 9.5 × 10 m/m°C. This process, reaching range temperatures from the full melting alloy to room temperature, results in phase formation dictated by the thermodynamic preferences of the alloyed elements, posing a significant challenge. Recent efforts in simulation and calculations have been undertaken elsewhere to address this challenge. This study focuses on a joint of two plates with differing cross-sectional areas, influencing heat transfer during welding. This report presents a case study focusing on the metallurgical changes observed in the microstructure within the welded zone, emphasizing alterations in the cooling rate of the welded joint. The investigation utilizes optical metallography, Vickers’s Hardness testing, and SEM (scanning electron microscopy) to comprehensively characterize the observed changes in addition to heat transfer simulation of the welded zone.

关键词： Ti Alloys Welding Phase Formation Hardness Metallography