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Probing shock geometry via the charge to mass ratio dependence of heavy ion spectra from multiple spacecraft observations of the 2013 November 4 event

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Research in Astronomy and Astrophysics 2016年第12期16卷 101-106页

作者： Lulu Zhao Gang Li Glenn M. Mason christina cohen Richard Mewaldt Mihir Desai Rob Ebert Maher Al-Dayeh Department of Physics and Space Sciences Florida Institute of Technology FL 32901 USA Department of Space Science and CSPAR University of Alabama in Hun-tsville Huntsville Alabama 35801 USA Applied Physics Laboratory Johns Hopkins University Laurel MD 20723 USA California Institute of Technology Pasadena CA 91125 USA Southwest Research Institute San Antonio TX 78228 USA University of Texas at San Antonio San Antonio TX 78249 USA

In large Solar Energetic Particle （SEP） events, ions can be accelerated at coronal mass ejection （CME）-driven shocks to very high energies. The spectra of heavy ions in many large SEP events show features such as roll-overs or spectral breaks. In some events when the spectra are plotted in terms of energy/nucleon, they can be shifted relative to each other to make the spectral breaks align. The amount of shift is charge to mass ratio （Q/A） dependent and varies from event to event. This can be understood if the spectra of heavy ions are organized by the diffusion coefficients （cohen et al. 2005）. In the work of Li et al. （2009）, the Q/A dependence of the scaling is related to shock geometry when the CME-driven shock is close to the Sun. For events where multiple in-situ spacecraft observations exist, one may expect that different spacecraft are connected to different portions of the CME-driven shock that have different shock geometries, therefore yielding different Q/A dependence. In this work, we examine one SEP event which occurred on 2013 November 4. We study the Q/A dependence of the energy scaling for heavy ion spectra using helium, oxygen and iron ions. Observations from STEREO-A, STEREO-B and ACE are examined. We find that the scalings are different for different spacecraft. We suggest that this is because ACE, STEREO- A and STEREO-B are connected to different parts of the shock that have different shock geometries. Our analysis indicates that studying the Q/A scaling of in-situ particle spectra can serve as a powerful tool to remotely examine the shock geometry for large SEP events.

关键词： Sun: particle emission -- acceleration of particles

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Generalized laws of refraction and reflection at interfaces between different photonic artificial gauge fields

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Light(Science & Applications) 2020年第1期9卷 45-55页

作者： Moshe-Ishay cohen christina Jörg Yaakov Lumer Yonatan Plotnik Erik H.Waller Julian Schulz Georg von Freymann Mordechai Segev Physics Department Technion-Israel Institute of TechnologyHaifa 32000Israel Solid State Institute Technion-Israel Institute of TechnologyHaifa 32000Israel Physics Department and Research Center OPTIMAS TU Kaiserslautern67663 KaiserslauternGermany Department of Physics The Pennsylvania State UniversityState CollegePA 16802USA Fraunhofer Institute for Industrial Mathematics ITWM 67663 KaiserslauternGermany

Artificial gauge fields the control over the dynamics of uncharged particles by engineering the potential landscape such that the particles behave as if effective external fields are acting on *** years have witnessed a growing interest in artificial gauge fields generated either by the geometry or by time-dependent modulation,as they have been enablers of topological phenomena and synthetic dimensions in many physical settings,e.g.,photonics,cold atoms,and acoustic ***,we formulate and experimentally demonstrate the generalized laws of refraction and reflection at an interface between two regions with different artificial gauge *** use the symmetries in the system to obtain the generalized Snell law for such a gauge interface and solve for reflection and *** identify total internal reflection(TIR)and complete transmission and demonstrate the concept in *** addition,we calculate the artificial magnetic flux at the interface of two regions with different artificial gauge fields and present a method to concatenate several gauge *** an example,we propose a scheme to make a gauge imaging system-a device that can reconstruct(image)the shape of an arbitrary wavepacket launched from a certain position to a predesigned location.

关键词： gauge refraction interface

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Expanding live-cell barcoding applications with mass cytometry using cadmium and platinum-labeled antibodies

Expanding live-cell barcoding applications with mass cytomet...

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第十四届全国免疫学学术大会

作者： Dan Li Michael cohen Huihui Yao Carlene Petes Daniel Majonis christina Loh

Mass cytometry,driven by CyTOF technology,uses antibodies labeled with monoisotopic metal tags,enabling high-resolution identification of discrete immune cell phenotypes and their *** advent of the antibody labeling method for seven cadmium and four platinum isotopes has enabled mass cytometry to expand the multiparametric characterization of single cells to 57 *** new possibilities afforded by these additional metal-tagged antibodies can be seen in their ability to both increase existing panel size and support new applications for innovative research *** have previously demonstrated that cadmium-labeled antibodies can effectively be used for livecell barcoding(LCB) of human peripheral blood mononuclear cells(PBMC) with antibodies targeting the pan-leukocyte protein *** LCB does not require prior fixation of cells,a major advantage of this approach is that it preserves the ability to multiplex-stain fix-sensitive *** this study,we have expanded upon the LCB approach by combining both cadmium and platinum-labeled anti-CD45 antibodies in a 7-choose-3,35-plex configuration to allow for added flexibility and customization of antibody ***,we observed similar results in LCB data quality on the new automated-acquisition CyTOF system when compared to the Helios mass *** enables the ability to run highly multiplexed barcoded samples for extended acquisition periods with less time needed supervising the ***,we show the use of LCB in human whole blood samples stained with the Maxpar Direct Immune Profiling ***,this work demonstrates added customizability and compatibility with existing workflows for live-cell barcoding,a powerful technique for improving data quality and increasing mass cytometry *** Research Use *** for use in diagnostic procedures.

关键词：免疫肿瘤质谱流式单细胞蛋白多通道成像流式高维免疫分型微环境

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Ulcerated Lesion in Buccal Mucosa in a Patient with Paracoccidioidomycosis——Case Report

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Journal of Biosciences and Medicines 2017年第10期5卷 44-50页

作者： Giovanna Lima Vaz Livia Cristina de Melo Pino Aline Gabriela Santos Costa Ibrahim Yahia El Somailli Joao Roberto Resende Fernandes Elayne christina Meireles Martins Daniel cohen Goldemberg Aline Hellen da Silva Camacho Rhanna Neves Cirqueira Daniel Almeida da Costa College of Medicine of Valenca—FAA/Cesva ValencaBrazil National Cancer Institute—INCA Rio de JaneiroBrazil Centro Universitario de Belo Horizonte-UNIBH Belo HorizonteBrazil

Paracoccidioidomycosis is the most prevalent systemic mycosis in Latin America. It is a fungal infection caused by the dimorphic fungus Paracoccidioides brasiliensis. This microorganism can penetrate the human body through direct contact and can cause intense lymphadenopathy, ulcerated lesions in the oral cavity and in the skin among other alterations. In this study, we report a case of paracoccidioidomycosis with unusual clinical presentation, as it manifested in the female sex and although it did not present any relevant complaints of respiratory focus, it presented a single ulcerated lesion in the buccal mucosa. A biopsy of the lesion and a mycological examination revealed Paracoccidioidesbrasiliensis infection.

关键词： Paracoccidioidomycosis Paracoccidioides brasiliensis Endemic Mycosis

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普林斯顿大学路易斯艺术中心美国新泽西州,普林斯顿

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世界建筑导报 2020年第5期35卷 39-43页

作者：史蒂文·霍尔 RA Noah Yaffe christina Yessios Jongseo Lee Nathan Rich Whitney Forward Chris McVoy Martin Kropac Scott Fredricks Alfonso Simelio Arseni Timofejev Michael Haddy Yasmin Vobis Zach cohen Jing Han Laetitia Buchter Ying Yi Cai Gary He Asami Takahashi Ebbie Wisecarver 史蒂文·霍尔建筑师事务所

新建的路易斯艺术中心位于校园南端,毗邻麦卡特剧院。配备了崭新的最先进的设施,大幅度扩展艺术表演、彩排及教学空间,将普林斯顿大学的艺术教育提升到更高的维度。这座综合体大楼创建了一个新的校园入口,重新塑造了校园空间,同时最大... 详细信息

新建的路易斯艺术中心位于校园南端,毗邻麦卡特剧院。配备了崭新的最先进的设施,大幅度扩展艺术表演、彩排及教学空间,将普林斯顿大学的艺术教育提升到更高的维度。这座综合体大楼创建了一个新的校园入口,重新塑造了校园空间,同时最大限度地提升了多孔性与活跃度。该项目由斯蒂文•霍尔建筑事务所和BNIM事务所合作设计,集合了舞蹈、戏剧、音乐剧和普林斯顿大学工作室,并为音乐学院扩建的新音乐大楼增设了教学和研究配置。建筑群体包含华莱士舞蹈大楼及剧院;由赫尔利画廊、行政办公室和其他工作室组成的艺术大楼;以及新音乐大楼。三幢大楼聚集在一个占地8,000平方英尺(约743平方米)的开放性室内大厅,作为艺术活动的主要场所。大厅之上是一个有着倒影水池的室外广场,自然光透过水池映射到底下的大厅中。

关键词：普林斯顿大学建筑事务所建筑群体教学空间赫尔利工作室校园空间美国新泽西州

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