Date: Tuesday Oct 22, 2019 Time: 4-5pm Location: Textiles 101E Speaker: Dipshika Das Abstract: Zeolite, both natural and synthetic, has a great affinity for ammonium. This has drawn researchers attention for last few decades to utilize the full scope of this mineral to remove ammonium from aqueous solution. Removal of ammoniacal nitrogen from agricultural run-off and wastewater is particularly important as it causes eutrophication of lake. This results into the depletion of dissolved oxygen, presents in water and engenders a toxic environment for aquatic lives. In our study, we intend to explore the potential of alkaline hydrothermal treatment to improve the ammonium removal efficiency of a synthetic zeolite, Chabazite (ALZB-Na). The three main parameters of the hydrothermal treatment are temperature, time extent of treatment and concentration of the base. We have permuted these parameters in several way and prepared treated Chabazites respectively. The ammonium uptake of each such sample was studied further to establish the optimum condition for the alkaline hydrothermal treatment of Chabazite. For further information, please contact Dr. Tracie Ferreira at firstname.lastname@example.org or 508-910-6537.
The Center for Portuguese Studies and Culture / Tagus Press and the Department of Portuguese proudly present Democracy and Contemporary Brazilian Literature A lecture by Leila Lehnen DATE: October 23, 2019 TIME: 5:00 p.m. LOCATION: LARTS 374 Drawing on Chantal Mouffe's idea of how the political intervenes in the cultural realm, this presentation proposes that Roy David Frankel's text Sess (2017) articulates an aesthetics of contestation and democratic engagement. The book title alludes to session 091 of the Chamber of Deputies, that was held on April 17, 2016, and that voted in favor of impeachment proceedings against President Dilma Rousseff. In the book Frankel transcribes entire speeches or selections from addresses that were given in the Chamber of Deputies. Frankel's manipulations of these discourses transform them into what might be considered political "poems." Leila Lehnen is Associate professor and Chair in the Department of Portuguese and Brazilian Studies at Brown University. Her book Citizenship and Crisis in Contemporary Brazilian Literature (2013) examines the portrayal and critique of differentiated citizenship (Holston 2008) in contemporary Brazilian literature. She has published numerous articles on citizenship, social justice, democracy, and human rights in Brazilian and Spanish-American literature and cultural production. For additional information, please contact Prof. Dario Borim, email@example.com or Prof. Victor Mendes firstname.lastname@example.org Parking Lot 1
In collaboration with the Center for Portuguese Studies, the Ferreira-Mendes Portuguese-American Archives will kick off the celebrations for its 10th anniversary by hosting a free piano recital by Portuguese pianist, Ines Andrade. The piano recital will take place from 6:30 to 8:30 PM on 24 October 2019 in the Main Auditorium (Room 102), McLean Campus Center. Doors will open at 6:15 PM. Guests should use parking lots 5 and 6. Ines Andrade holds both a Bachelors and a Masters degree in Piano Performance and Pedagogy from Escola Superior de Musica de Lisboa (Lisbon, Portugal). She is a recent graduate of Boston University where she earned her Doctor of Musical Arts. Her dissertation project was entitled,Tradition and Innovation in the Piano Works of Portuguese composer Antonio Fragoso. Andrade has performed throughout the United States and Europe in such prestigious venues as Carnegie Hall's Weill Recital Hall (United States), Centro Cultural de Belem (Portugal) and Teatro Comunale Luigi Russolo (Italy). She is a versatile soloist and chamber pianist who has been praised for her lyricism and wonderful musicianship (DiÃrio de Noticias). Most recently, Andrade completed a tour in China. Throughout her career Andrade has earned multiple awards such as the Portuguese Young Musicians Prize, and the 2013 Steinhardt Piano Concerto Competition. She is also the founder and Artistic Director of the Bendada Music Festival, a youth summer festival in Portugal which won the 2017 CFA Spark Grant. Dr. Paula Celeste Gomes Noversa, the new Faculty Director of the Ferreira-Mendes Portuguese-American Archives stated, I cannot imagine a better way to begin celebrating the Archives 10th anniversary than to bring such a talented and creative artist to the campus for the benefit and enjoyment of the Portuguese-American community. For further information, contact Dr. Paula Celeste Gomes Noversa (508-910-6888) or email her at email@example.com.
5:30 P.M. Dinner, By invitation 7:30 P.M. Social Hour, All welcome Location: Frederick Douglass Unity House Contact: Donna Moore, firstname.lastname@example.org or 508-999-9222 Sponsored by Frederick Douglass Unity House & BH4SC
Topic: Effect of Axial Pressure Treatment on Effective Coupling Coefficient of Piezoelectric PZT-5A for Electroacoustics Location: Lester W. Cory Conference Room, Science & Engineering Building (Group II), Room 213A Abstract: It was previously shown by R. Y. Nishi1 that effects of a high, static, one-dimensional stress on the properties of piezoelectric ceramics are important in the design of some types of underwater transducers. In a conventional mass-loaded resonator incorporating ceramic as the active element, the stress in the ceramic owing to the static water pressure in the direction of the polar axis of the ceramic, and can be larger than the water pressure when the ceramic cross-sectional area is smaller than the radiating face of the resonator. Changes in the high-field permittivity and loss due to hydrostatic pressure superimposed on a one-dimensional bias pressure were small, provided that the bias pressures were applied to the ceramics at least one week before the hydrostatic pressure. PZT-5A ceramic subjected to one-dimensional stress becomes anisotropic with substantial increase of the piezoelectric modulus d32 of its original value after exposure to static pressure in a direction perpendicular to the polar axis. Practical appreciation of this effect is not known from literature. Moreover, experimental work on the effect of hydrostatic pressure on the piezoelectric and high-field dielectric properties of two piezoceramic projector materials was presented by R. F. Brown2. Two materials, a modified barium titanate and modified lead zirconate titanate, were characterized by low dielectric losses at high fields. In the pressure range 0 to 10 000 psi and at non-resonant driving fields up to 3 kV/cm, the variations observed in the permittivity and piezoelectric strain constants with hydrostatic pressure were less than 7%, and no significant variations were found in the dielectric loss. Aging studies at 10,000 psi showed that the permittivity and dielectric loss for both materials reached constant values after a few minutes. This research is concerned with investigating the possibility of using axial pressure treated PZT-5A rings to improve the electromechanical parameters for electroacoustic applications. An xperimental technique of pressure treatment that allows dynamic measuring parameters of the ring in the process of exposure to the pressure is described. Results of the pressure treatment on parameters of the cylinders are presented. It is shown that the improvement in the PZT-5A coupling coefficient is about WHAT due to pressure treatment was stable over time. NOTE: All ECE Graduate Students are ENCOURAGED to attend. All interested parties are invited to attend. Open to the public. Advisor: Dr. David A. Brown Committee Members: Dr. Paul J. Gendron and Dr. Yifei Li, Department of Electrical & Computer Engineering, UMASS Dartmouth; Dr. Boris Aronov, Consulting Scientist, Artech Engineering Plus *For further information, please contact Dr. David Brown at 508.999.8479, or via email at email@example.com.
Topic: Vivo: Enhancing the Security of Voice Control System Via Wireless Signal in IOT Environment Location: College of Engineering Conference Room, Textiles Building (TXT), Room 101E Abstract: With the prevalent of smart devices and home automations, voice command has become a popular User Interface (UI) channel in the IoT environment. Although Voice Control System (VCS) has the advantages of great convenience, it is extremely vulnerable to the spoofing attack (e.g., replay attack, hidden/inaudible command attack) due to its broadcast nature. In this study, we present WiVo, a device-free voice liveness detection system based on the prevalent wireless signals generated by IoT devices without any additional devices or sensors carried by the users. The basic motivation of WiVo is to distinguish the authentic voice command from a spoofed one via its corresponding mouth motions, which can be captured and recognized by wireless signals. To achieve this goal, WiVo builds a theoretical model to characterize the correlation between wireless signal dynamics and the user's voice syllables. WiVo extracts the unique features from both voice and wireless signals, and then calculates the consistency between these different types of signals in order to determine whether the voice command is generated by the authentic user of VCS or an adversary. To evaluate the effectiveness of WiVo, we build a testbed based on Samsung SmartThings framework and include WiVo as a new application, which is expected to significantly enhance the security of the existing VCS. We have evaluated WiVo with 6 participants and different voice commands. Experimental evaluation results demonstrate that WiVo achieves the overall 99% detection rate with 1% false accept rate and has a low latency. Biography: Xiaohui Liang is an Assistant Professor with the Department of Computer Science at University of Massachusetts, Boston (UMB). He was a Postdoctoral Researcher at Dartmouth College in 2014-2015. He received the PhD degree (awarded Outstanding Achievement in Graduate Studies) in Electrical and Computer Engineering, University of Waterloo, Canada, in 2013. He received the BSc (with the University Excellent Undergraduate Thesis Award) and MSc degree (with the Shanghai Excellent Master Thesis Award) in Computer Science from Shanghai Jiao Tong University, China, in 2006 and 2009, respectively. His research interests include networking security, wireless security, and security for mobile systems. He has published over 100 refereed journal and conference papers, and his H-Index is 44 as of September, 2019 according to Google Scholar. He is a member of IEEE and ACM. He received the Award for Excellence in Scalable Computing for Early Career Researchers from IEEE Technical Committee on Scalable Computing in 2017, the Best Land Transportation Paper Award from IEEE Vehicular Technology Society in 2017, the Internet of Things Technology Research Award from Google in 2016, the Best Paper Award in BodyNets 2010. He is the Single PI of an NIH R01 Project and the Lead PI of an NSF Project. Check http://faculty.umb.edu/xiaohui.liang/. The Seminars is open to the public free of charge. *For further information, please contact Dr. Honggang Wang at 508.999.8469, or by via email at firstname.lastname@example.org.
SEPTEMBER 30-OCTOBER 30 Through Our Eyes | A Collaborative Photography Exhibition Reception: Thursday, October 3, 5-7 pm Gallery Talk 6 pm The over thirty contributing photographers are all adult English-language learners at SER-Jobs for Progress, Inc. who have made their home in Fall River. Images of celebrations, making and sharing of food, the beauty of nature, details of daily life, etc along with the accompanying narratives reveal what it has been like to leave a homeland in order to make a new life in the U.S. The project was sponsored by a MassHumanities grant and directed by Prof. Andrea Klimt (Sociology and Anthropology Department).
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