FIO Kicks Off with Symposium, Student Leadership Meeting and Reception
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Vanadium Dioxide Phase Transition Modeling and Bias Control for Photodetection
VANADIUM DIOXIDE PHASE TRANSITION MODELING AND BIAS CONTROL FOR PHOTODETECTION by Zhongnan Qu A thesis submitted in conformity with the requirements for the degree of Master of Applied Science The Edward S. Rogers Sr. Department of Electrical & Computer Engineering University of Toronto © Copyright by Zhongnan Qu 2020 Abstract Vanadium Dioxide Phase Transition Modeling and Bias Control for Photodetection Zhongnan Qu Master of Applied Science The Edward S. Rogers Sr. Department of Electrical & Computer Engineering University of Toronto 2020 Vanadium dioxide (VO2) is a transition material that demonstrates phase transitions between the insulator and metallic states when under thermal, electrical or optical stimuli. It is a promising material for novel devices, for instance, switches, volatile memory, oscillatory neural network units, and photodetectors. Despite being a long-standing interest in the field of condensed matter physics, the numerous observed properties of VO2 remain insufficiently explained, which impedes the progress of its utilization for electronic devices. This thesis develops theoretical explanations and corresponding analytical and numerical models that fit our fabricated VO2 devices. This thesis also investigates the feasibility of utilizing VO2 as photodetectors and develops a bias control circuit with low-cost off-the-shelf circuit components, enabling repeated operations despite the hysteresis effect, demonstrated the potential of VO2 to be integrated with existing electronics. ii Acknowledgments I thank my supervisor, Prof. Joyce Poon for granting me this opportunity as well as providing me the support and environment to conduct this research. Her guidance and encouragement throughout my master’s study have allowed it to be an enriching and fruitful experience. I thank Junho Jeong and Dr. -
Criticalreading #Wickedproblem
#CRITICALREADING #WICKEDPROBLEM We have a “wicked problem” . and that is a fantastic, engaging, exciting place to start. Carolyn V. Williams1 I. INTRODUCTION I became interested in the idea of critical reading—“learning to evaluate, draw inferences, and arrive at conclusions based on evidence” in the text2—when I assumed that my students would show up to law school with this skill . and then, through little fault of their own, they did not. I have not been the only legal scholar noticing this fact. During the 1980s and 90s a few legal scholars conducted research and wrote about law students’ reading skills.3 During the 2000s, a few more scholars wrote about how professors can help develop critical reading skills in law students.4 But it has not been until the past few years or so that legal scholars have begun to shine a light on just how deep the problem of law students’ critical reading skills 1 Professor Williams is an Associate Professor of Legal Writing & Assistant Clinical Professor of Law at the University of Arizona, James E. Rogers College of Law. Thank you to Dean Marc Miller for supporting this Article with a summer research grant. Many thanks to the Legal Writing Institute for hosting the 2018 We Write Retreat and the 2018 Writers’ Workshop and to the participants at each for their comments and support of this project. A heartfelt thank you to Mary Beth Beazley, Kenneth Dean Chestek, and Melissa Henke for graciously providing comments on prior drafts of this Article. Thank you to my oldest Generation Z child for demonstrating independence and the desire to fix broken systems so that I know my solution is possible. -
Nanoengineering Is Thriving
TINY SOLUTIONS FOR BIG PROBLEMS At U of T, nanoengineering is thriving. Our unique facilities RESEARCH IN FOCUS: enable our partners in industry to build the 21st century nanotechnologies needed to provide faster, greener and more resilient products. Whether you are a sector-leading company looking for new innovations or a nimble startup aiming to bridge the gap between concept and commercialization, NANOENGINEERING U of T Engineering has what you need to take your project to the next level. We have a strong track record of success, entrepreneurship, patents, inventions and industry solutions. HERE’S WHAT PARTNERING WITH U OF T ENGINEERING DELIVERS: — An inside track to breakthrough technologies — Customized solutions to industrially relevant problems — An extra spark of innovation to your company CHALLENGE: — Collaboration with U of T Engineering’s world-leading researchers, including top How can we make smartphones smarter, graduate students, undergraduate students and alumni solar energy less expensive and medical conditions easier to diagnose? RESEARCH SOLUTION: IMPACT Leverage the power of nanoengineering. EDUCATION PARTNERSHIPS OFFICE OF THE VICE-DEAN, RESEARCH FACULTY OF APPLIED SCIENCE & ENGINEERING UNIVERSITY OF TORONTO 416-946-3038 | [email protected] uoft.me/collaboration PROFESSOR GLENN HIBBARD NANOARCHITECTURE FOR STRONGER MATERIALS THE POWER OF PARTNERSHIP A bridge is mostly empty space; it is the unique shape of the trusses and struts that provide its strength. Professor Glenn Hibbard and his team are applying that same principle on the nano scale, designing intricate 3D One nanometre is to the thickness of a human hair as Department of Materials Science & Engineering and structures that lead to lighter, stronger materials for use in the aerospace one inch is to a mile. -
Generation Times of E. Coli Prolong with Increasing Tannin Concentration While the Lag Phase Extends Exponentially
plants Article Generation Times of E. coli Prolong with Increasing Tannin Concentration while the Lag Phase Extends Exponentially Sara Štumpf 1 , Gregor Hostnik 1, Mateja Primožiˇc 1, Maja Leitgeb 1,2 and Urban Bren 1,3,* 1 Faculty of Chemistry and Chemical Engineering, University of Maribor, Maribor 2000, Slovenia; [email protected] (S.Š.); [email protected] (G.H.); [email protected] (M.P.); [email protected] (M.L.) 2 Faculty of Medicine, University of Maribor, Maribor 2000, Slovenia 3 Faculty of Mathematics, Natural Sciences and Information Technologies, University of Primorska, Koper 6000, Slovenia * Correspondence: [email protected]; Tel.: +386-2-2294-421 Received: 18 November 2020; Accepted: 29 November 2020; Published: 1 December 2020 Abstract: The current study examines the effect of tannins and tannin extracts on the lag phase duration, growth rate, and generation time of Escherichia coli.Effects of castalagin, vescalagin, gallic acid, Colistizer, tannic acid as well as chestnut, mimosa, and quebracho extracts were determined on E. coli’s growth phases using the broth microdilution method and obtained by turbidimetric measurements. E. coli responds to the stress caused by the investigated antimicrobial agents with reduced growth rates, longer generation times, and extended lag phases. Prolongation of the lag phase was relatively small at low tannin concentrations, while it became more pronounced at concentrations above half the MIC. Moreover, for the first time, it was observed that lag time extensions follow a strict exponential relationship with increasing tannin concentrations. This feature is very likely a direct consequence of the tannin complexation of certain essential ions from the growth medium, making them unavailable to E. -
The Following Paper Posted Here Is Not the Official IEEE Published Version
The following paper posted here is not the official IEEE published version. The final published version of this paper can be found in the Proceedings of the IEEE International Conference on Communication, Volume 3:pp.1490-1494 Copyright © 2004 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. Investigation and modeling of traffic issues in immersive audio environments Jeremy McMahon, Michael Rumsewicz Paul Boustead, Farzad Safaei TRC Mathematical Modelling Telecommunications and Information Technology Research University of Adelaide Institute South Australia 5005, AUSTRALIA University of Wollongong jmcmahon, [email protected] New South Wales 2522, AUSTRALIA [email protected], [email protected] Abstract—A growing area of technical importance is that of packets being queued at routers. distributed virtual environments for work and play. For the This is an area that has not undergone significant research audio component of such environments to be useful, great in the literature. Most of the available literature regarding emphasis must be placed on the delivery of high quality audio synchronization in multimedia relates to synchronizing audio scenes in which participants may change their relative positions. with video playout (e.g. [5], [6], [7]) and / or requires a global In this paper we describe and analyze an algorithm focused on maintaining relative synchronization between multiple users of synchronization clock such as GPS (e.g. -
Natalie Enright Jerger
Natalie Enright Jerger Contact The Edward S. Rogers Department of Electrical Voice: (416) 978-5056 Information and Computer Engineering Fax: (416) 971-2326 10 King's College Rd E-mail: [email protected] University of Toronto Webpage: www.eecg.toronto.edu/~enright Toronto, ON M5S 3G4 Canada Education University of Wisconsin, Madison, Wisconsin USA Ph.D., Electrical Engineering, December 2008 • Dissertation: \Chip Multiprocessor Coherence and Interconnect System Design" • Advisors: Mikko H. Lipasti and Li-Shiuan Peh (Princeton) M.S., Electrical and Computer Engineering, May 2004 Purdue University, West Lafayette, Indiana USA B.S., Computer Engineering, May 2002 Appointment University of Toronto, Electrical and Computer Engineering, Toronto, Ontario, Canada Assistant Professor January 2009 - present Research Computer architecture, many-core architectures, on-chip networks, cache coherence protocols, inter- Interests connection networks, emerging applications for many-core architectures. Honors and IBM Ph.D. Fellowship, 2008 Awards IBM Ph.D. Fellowship, 2007 Peter R. Schneider Distinguished Graduate Fellowship, University of Wisconsin-Madison, 2002 University of Wisconsin Teaching Academy Future Faculty Partner, 2004-2008 Publications [B1] Natalie Enright Jerger and Li-Shiuan Peh. \On-Chip Networks", Synthesis Lecture in Book Computer Architecture. (Editor: Mark Hill). Morgan & Claypool Publishers. July 2009, 141 pages. (downloaded over 1100 times as of April 2011). Citations 41. Publications [J1] Radu Marculescu, Umit Ogras, Li-Shiuan Peh, Natalie Enright Jerger and Yatin Hoskote. Journal Outstanding Research Problems in NoC Design: Circuit-, Microarchitecture- and System-Level Perspective. In IEEE Transactions on Computer-Aided Design, Jan 2009. (Most downloaded article in Transactions on Computer-Aided Design of 2009.) Citations: 76. [J2] Natalie Enright Jerger, Mikko Lipasti and Li-Shiuan Peh. -
Chapter 04 Lecture
Chapter 04 Lecture 1 A GLIMPSE OF HISTORY German physician Robert Koch (1843–1910) Studied disease-causing bacteria; Nobel Prize in 1905 Developed methods of cultivating bacteria Worked on methods of solid media to allow single bacteria to grow and form colonies Tried potatoes, but nutrients limiting for many bacteria • Solidifying liquid nutrient media with gelatin helped • Limitations: melting temperature, digestible • In 1882, Fannie Hess, wife of associate, suggested agar, then used to harden jelly INTRODUCTION Prokaryotes found growing in severe conditions Ocean depths, volcanic vents, polar regions all harbor thriving prokaryotic species Many scientists believe that if life exists on other planets, it may resemble these microbes Individual species have limited set of conditions Also require appropriate nutrients Important to grow microbes in culture Medical significance Nutritional, industrial uses 4.1. PRINCIPLES OF BACTERIAL GROWTH Prokaryotic cells divide by binary fission Cell gets longer and One cell divides into two, two DNA replicates. into four, 48, 816, etc… Exponential growth: population DNA is moved into each future daughter doubles each division cell and cross wall forms. Generation time is time it takes to double Varies among species Cell divides into two cells. Environmental conditions Exponential growth has important consequences Cells separate. 10 cells of food-borne pathogen in potato salad at picnic can become 40,000 cells in 4 hours Daughter cells 4.1. PRINCIPLES OF BACTERIAL GROWTH Growth can be calculated n Nt = N0 x 2 Nt = number of cells in population at time t N0 = original number of cells in population n = number of divisions Example: pathogen in potato salad at picnic in sun Assume 10 cells with 20 minute generation time N0 = 10 cells in original population n = 12 (3 divisions per hour for 4 hours) n 12 Nt = N0 x 2 = 10 x 2 Nt = 10 x 4,096 Nt = 40,960 cells of pathogen in 4 hours! 4.1. -
Pannexin 1 Transgenic Mice: Human Diseases and Sleep-Wake Function Revision
International Journal of Molecular Sciences Article Pannexin 1 Transgenic Mice: Human Diseases and Sleep-Wake Function Revision Nariman Battulin 1,* , Vladimir M. Kovalzon 2,3 , Alexey Korablev 1, Irina Serova 1, Oxana O. Kiryukhina 3,4, Marta G. Pechkova 4, Kirill A. Bogotskoy 4, Olga S. Tarasova 4 and Yuri Panchin 3,5 1 Laboratory of Developmental Genetics, Institute of Cytology and Genetics SB RAS, 630090 Novosibirsk, Russia; [email protected] (A.K.); [email protected] (I.S.) 2 Laboratory of Mammal Behavior and Behavioral Ecology, Severtsov Institute Ecology and Evolution, Russian Academy of Sciences, 119071 Moscow, Russia; [email protected] 3 Laboratory for the Study of Information Processes at the Cellular and Molecular Levels, Institute for Information Transmission Problems, Russian Academy of Sciences, 119333 Moscow, Russia; [email protected] (O.O.K.); [email protected] (Y.P.) 4 Department of Human and Animal Physiology, Faculty of Biology, M.V. Lomonosov Moscow State University, 119234 Moscow, Russia; [email protected] (M.G.P.); [email protected] (K.A.B.); [email protected] (O.S.T.) 5 Department of Mathematical Methods in Biology, Belozersky Institute, M.V. Lomonosov Moscow State University, 119234 Moscow, Russia * Correspondence: [email protected] Abstract: In humans and other vertebrates pannexin protein family was discovered by homology to invertebrate gap junction proteins. Several biological functions were attributed to three vertebrate pannexins members. Six clinically significant independent variants of the PANX1 gene lead to Citation: Battulin, N.; Kovalzon, human infertility and oocyte development defects, and the Arg217His variant was associated with V.M.; Korablev, A.; Serova, I.; pronounced symptoms of primary ovarian failure, severe intellectual disability, sensorineural hearing Kiryukhina, O.O.; Pechkova, M.G.; loss, and kyphosis. -
A Theory for the Age and Generation Time Distribution of a Microbial Population
Journal of Mathematical Biology 1, 17--36 (1974) by Springer-Verlag 1974 A Theory for the Age and Generation Time Distribution of a Microbial Population J. L. Lebowitz* and S. I. Rubinow, New York Received October 9, 1973 Summary A theory is presented for the time evolution of the joint age and generation time distribution of a microbial population. By means of the solution to the fundamental equation of the theory, the effect of correlations between the generation times of mother and daughter cells may be determined on the transient and steady state growth stages of the population. The relationships among various generation time distributions measured under different experimental circumstances is clarified. 1. Introduction A striking property of microbial populations, even when grown under constant environmental conditions, is the great variability of the generation times of individual members of the population, illustrated in Fig. 1. The cause of this variability remains an important unsolved biological problem. The variability is generally ascribed to intrinsic variable factors associated with cell growth and maturation, culminating in division [1]. Prescott [2] has suggested that the variability stems from variability in the initial state of a newborn cell, where initial state means cell weight, number of mitochondria, microsomes, etc. Variability in the initial state of the chromosome is likewise a fundamental feature of the Cooper-Helmstetter model for chromo- some replication in E. coli [3]. In both of these views, the generation time is determined at birth. * Also Physics Department, Belfer Graduate School of Sciences, Yeshiva University, New York, NY 10019, U.S.A. Journ. -
Causemap: Fast Inference of Causality from Complex Time Series
CauseMap: fast inference of causality from complex time series M. Cyrus Maher1 and Ryan D. Hernandez2,3,4 1 Department of Epidemiology and Biostatistics, University of California, San Francisco, CA, USA 2 Department of Bioengineering and Therapeutic Sciences, USA 3 Institute for Human Genetics, USA 4 Institute for Quantitative Biosciences (QB3), University of California, San Francisco, CA, USA ABSTRACT Background. Establishing health-related causal relationships is a central pursuit in biomedical research. Yet, the interdependent non-linearity of biological systems renders causal dynamics laborious and at times impractical to disentangle. This pursuit is further impeded by the dearth of time series that are suYciently long to observe and understand recurrent patterns of flux. However, as data generation costs plummet and technologies like wearable devices democratize data collection, we anticipate a coming surge in the availability of biomedically-relevant time series data. Given the life-saving potential of these burgeoning resources, it is critical to invest in the development of open source software tools that are capable of drawing meaningful insight from vast amounts of time series data. Results. Here we present CauseMap, the first open source implementation of convergent cross mapping (CCM), a method for establishing causality from long time series data (&25 observations). Compared to existing time series methods, CCM has the advantage of being model-free and robust to unmeasured confounding that could otherwise induce spurious associations. CCM builds on Takens’ Theorem, a well-established result from dynamical systems theory that requires only mild assumptions. This theorem allows us to reconstruct high dimensional system dy- namics using a time series of only a single variable. -
2017/18 Annual Report
Annual Report 2017 2018 2017-2018 milestones New initiatives, new partnerships, new opportunities in support of globally competitive hardware innovation. CMC concludes deployment of advanced infrastructure for micro-nanosystems research to 37 Canadian universities under the $50M CFI-funded Embedded Systems Canada CMC’s biennial Lab2Fab workshop held (emSYSCAN) project. in Montréal and Bromont, QC. CMC marks the 500th project prototyped at a university-based nanofabrication lab through support from its Micro-Nanofabrication Financial Assistance Program, established in 2009. Gordon Harling, CMC marks the delivery of the 700th photonics/optoelectronics microelectronics design prototyped for a client; 500 of these prototypes are in the industry executive and emerging field of silicon photonics. serial entrepreneur, becomes President CMC and NanoCanada co-host Innovation 360, Canada’s and CEO of CMC largest annual gathering of micro-nano innovators from industry Microsystems. and academia. Mohawk College joins Canada’s National Design Network®. 2 Table of contents Letter from the Chair of the Board page 4 Mapping the future page 6 Board of Directors page 7 Canada’s National Design Network page 8 Research excellence pages 9-11 Industrial impact pages 12-14 CMC by the numbers page 15 Developing next-generation innovators pages 16-18 From idea to manufacturable prototype pages 19-21 Global partnerships pages 22-23 Working together on real-world problems pages 24-25 Celebrating innovation page 26 TEXPO 2017 page 27 Community involvement page 28 Financials page 29 Letter from the Chair of the Board The past year has been one of challenges and opportunities for CMC Microsystems. Funding uncertainty and a transition to new leadership have been accompanied by new initiatives, new partnerships, and new insights into CMC’s role in, and value to, Canada. -
Germany & Canada
ITB infoservice Special Edition No. 16 – 06/2021 Germany & Canada Celebrating 50 Years of Scientific and Technological Cooperation Table of Contents Editorial 4 German-Canadian Cooperation in Science & Technology: Past, Present and Future 6 Two Countries – Many Paths to Cooperation 10 Mitacs and the DAAD: Cross Border Research Internships ....................................................................10 NSERC and DFG: Collaborative Research Training in Natural Sciences and Engineering ...............12 The German Cluster ‘it’s OWL’ in Canada: Connecting Ostwestfalen-Lippe and British Columbia .................................................................................................................................................15 Academic Mobility and Regional Scientific Cooperation – The View from Ontario and Baden-Württemberg .........................................................................................................................................17 Academic Mobility and Regional Scientific Cooperation – The View from Bavaria and Québec .................................................................................................................................................................20 Joining Innovation Ecosystems 22 FPC@Western – Strengthening Links between Fraunhofer and North American Industry ............22 Max Planck Establishes a Third Centre with Canada ................................................................................24 National Research Council of Canada (NRC) in Germany: