EE Seminar: Handling huge fiber-sets in Diffusion-Weighted MRI Brain Analysis: The Fiber-Density-Coreset for redundancy reduction

Speaker: Guy Alexandroni,

M.Sc. student under the supervision of Prof. Hayit Greenspan.

Wednesday, January 11^th, 2017 at 15:00

Room 011, Kitot Bldg., Faculty of Engineering

Handling huge fiber-sets in Diffusion-Weighted MRI Brain Analysis: The Fiber-Density-Coreset for redundancy reduction

Abstract

State of the art Diffusion Weighted Magnetic Resonance Imaging protocols (DW-MRI), followed by advanced tractography techniques, produce impressive reconstructions of white matter pathways in the brain. These pathways often contain millions of trajectories (fibers). While for several applications the high number of fibers is essential, other applications (visualization, registration, some types of across-subject comparison) can achieve satisfying results using much smaller sets and may be overburdened by the computational load of the large fiber sets.

In this work, we present a novel, highly efficient algorithm for extracting a meaningful subset of fibers, which we term the Fiber-Density-Coreset (FDC). The reduced set is optimized to represent the main structures of the brain. FDC is based on an efficient geometric approximation paradigm named coresets, an optimization scheme showing much success in tasks requiring large computation time and/or memory. The reduced sets were evaluated by several methods, including a novel structural comparison to the full sets called 3D indicator structure comparison. The comparison was applied to High Angular Resolution Diffusion Imaging (HARDI) scans of 15 healthy individuals obtained from the Human Connectome Project. FDC produced the most satisfying subsets, consistently in all subjects. It also displayed low memory usage and significantly lower running time than conventional fiber reduction schemes.

Additional tools, developed for handling huge fiber-sets such as fiber compression by sparse representation and automatic tract segmentation methods, will be briefly reviewed as well

11 בינואר 2017, 15:00

חדר 011, בניין כיתות-חשמל

EE Seminar: From scaling disparities to integrated parallelism: Space-division multiplexing in fiber-optic communications

(The talk will be given in English)

Speaker: Dr. Peter Winzer
Bell Labs

Monday, January 16^th, 2016
15:00 - 16:00

Room 011, Kitot Bldg., Faculty of Engineering

From scaling disparities to integrated parallelism: Space-division multiplexing in fiber-optic communications

Abstract
The evolution of network traffic and communication technologies over the past 10+ years and their projections into the coming 10+ years reveal increasingly pronounced scaling disparities between technologies used to create and process data and technologies used to transport data. In core networks, we expect the need for 10+ Terabit/s transponders working over Petabit/s systems within the coming decade. However, with the help of digital coherent detection, advanced multi-dimensional modulation, shaping, and coding, these systems are now rapidly approaching recently established estimates for the Shannon capacity of the nonlinear fiber-optic channel. By 2020, leading-edge network operators will require capacities that are physically impossible to implement using conventional optical transmission technologies. Highly integrated spatially parallel optical transmission solutions (Space-Division Multiplexing, SDM) seem to be the only long-term viable path to overcome the looming optical networks capacity crunch. We discuss the implications of ultimately unavoidable spatial crosstalk in highly parallel SDM systems and examine how multiple-input-multiple-output (MIMO) digital signal processing, well established in wireless communications (albeit on a different set of boundary conditions), can be used to scale optical core networks. A look at information theoretic security enabled by SDM-based fiber-optic transmission systems rounds off our discussion.

Bio
Peter J. Winzer received his Ph.D. in electrical engineering from the Vienna University of Technology, Austria, in 1998. Supported by the European Space Agency (ESA), he investigated photon-starved space-borne Doppler lidar and laser communications using high-sensitivity digital modulation and detection. At Bell Labs since 2000, he has focused on various aspects of high-bandwidth fiber-optic communication systems, including Raman amplification, advanced optical modulation formats, multiplexing schemes, and receiver concepts, digital signal processing and coding, as well as on robust network architectures for dynamic data services. He contributed to several high-speed and high-capacity optical transmission records with interface rates from 10 Gb/s to 1 Tb/s, including the first 100G and the first 400G electronically multiplexed optical transmission systems and the first field trial of live 100G video traffic over an existing carrier network. Since 2008 he has been investigating and internationally promoting spatial multiplexing as a promising option to scale optical transport systems beyond the capacity limits of single-mode fiber. He currently heads the Optical Transmission Systems and Networks Research Department at Bell Labs in Holmdel, NJ. He has widely published and patented and is actively involved in technical and organizational tasks with the IEEE Photonics Society and the Optical Society of America (OSA), currently serving as Editor-in-Chief of the IEEE/OSA Journal of Lightwave Technology. He has been Program Chair of the 2009 European Conference on Optical Communications (ECOC) and Program Chair and General Chair of the 2015 and 2017 Optical Fiber Communication Conference (OFC). Dr. Winzer is a Bell Labs Fellow, a Fellow of the IEEE and the OSA, and a 2015 Thomson Reuters Highly Cited Researcher, the only one from industry in Engineering.

16 בינואר 2017, 15:00

חדר 011, בניין כיתות-חשמל

EE Seminar: Learning to act from observational data

(The talk will be given in English)

Speaker: Dr. Uri Shalit
Courant Institute of Mathematical Sciences, New York University

Sunday, January 1^st, 2017
15:00 - 16:00

Room 011, Kitot Bldg., Faculty of Engineering

Learning to act from observational data

Abstract

The proliferation of data collection in the health, commercial, and economic spheres, brings with it opportunities for extracting new knowledge with concrete policy implications. Examples include individualizing medical practices based on electronic healthcare records, and understanding the implications of job training programs on employment and income.

The scientific challenge lies in the fact that standard prediction models such as supervised machine learning are often not enough for decision making from this so-called “observational data”: Supervised learning does not take into account causality, nor does it account for the feedback loops that arise when predictions are turned into actions. On the other hand, existing causal-inference methods are not adapted to dealing with the rich and complex data now available, and often focus on populations, as opposed to individual-level effects.
The problem is most closely related to reinforcement learning and bandit problems in machine learning, but with the important property of having no control over experiments and no direct access to the actor’s model.

In my talk I will discuss how we apply recent ideas from machine learning to individual-level causal-inference and action. I will introduce a novel generalization bound for estimating individual-level treatment effect, and further show how we use representation learning and deep temporal generative models to create novel algorithms geared towards this problem. Finally, I will show experimental results using data from electronic medical records and data from a job training program.

Bio

Uri Shalit is a postdoctoral researcher in the Courant Institute of Mathematical Sciences, New York University, working at David Sontag's Clinical Machine Learning Lab. His research is focused on creating new methods for finding causal relationships in large-scale high-dimensional observational studies. One of the major motivations for his research is applications in healthcare and clinical medicine. Uri completed his PhD studies at the School of Computer Science & Engineering at The Hebrew University of Jerusalem, under the guidance of Prof. Gal Chechik and Prof. Daphna Weinshall. From 2011 to 2014 Uri was a recipient of Google's European Fellowship in Machine Learning. Previously he has received the Daniel Amit fellowship for significant contribution in theoretical or computational neuroscience, and the Alice and Jack Ormut Foundation PhD Fellowship.

01 בינואר 2017, 15:00

חדר 011, בניין כיתות חשמל

EE Seminar: 5th Generation Mobile Communications - An Overview of Research and Challenges in the Related RF-Circuitry

(The talk will be given in Hebrew)

Speaker: Dr. Oren Eliezer
PHAZR

Wednesday, December 21^st, 2016
15:00 - 16:00

Room 011, Kitot Bldg., Faculty of Engineering

5th Generation Mobile Communications - An Overview of Research and Challenges in the Related RF-Circuitry

Abstract

5th generation cellular communication systems are expected to be deployed in 2020, following the pace of one generation per decade that has been experienced ever since the first generation. While the 3GPP standardization group efforts are ongoing, some pre-standard systems are already being developed, demonstrating data-rates that can exceed 1Gpbs per user.

This seminar will present some of the RF-circuitry related challenges associated with the design and deployment of 5th generation cellular systems, and will highlight several different fields of ongoing research, which may offer career/business/research opportunities. The work of several leading researchers in the field will be discussed and some industry examples will be shown.

In particular, the challenges associated with efficient use of spectrum and power-efficient transmission will be discussed.

Bio
Dr. Oren Eliezer has 28 years of experience in the design and productization of wireless communication systems and ICs.

He received his BSEE and MSEE degrees from the Tel-Aviv University in 1988 and in 1997, focusing on communication systems and signal processing, and his PhD in microelectronics from the University of Texas at Dallas in 2008.

After serving for 6 years as an engineer in the IDF, he co-founded Butterfly Communications, which was acquired by Texas Instruments (TI) in 1999.

He was relocated by TI to Dallas in 2002, where he was elected senior member of the technical staff, and took part in the development of TI’s digital-radio-processor (DRP) technology.

Since 2009 he has been involved in academic research and teaching at the University of Texas at Dallas and the University of North Texas, as well as in entrepreneurship with several startup companies in the Dallas area.

He is currently with PHAZR, a pioneer in millimeter-wave wireless systems for 5th generation cellular communications.

He has authored and coauthored over 55 journal and conference papers and over 45 patents, and has given over 50 tutorials related to communication system and IC design and productization.

He is a senior member of the IEEE, regularly reviews papers for various IEEE publications and serves on the organizing committees of 4 different IEEE conferences.

21 בדצמבר 2016, 15:00

חדר 011, בניין כיתות חשמל

PDF	טופס השתתפות בסמינרים מחלקתיים - המחלקה למדע והנדסה של חומרים
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	טופס השתתפות בסיורים קבוצתיים מאורגנים

20 דצמבר 2016

ידיעות נוספות בנושא

הנכם מוזמנים ליום עיון של האיגוד להנדסה רפואית וביולוגית בנושא חידושים באבחון, פרוגנוזה וטיפול בסרטן.

08 בינואר 2017, 16:34

יום עיון של האיגוד להנדסה רפואית וביולוגית

חידושים באבחון, פרוגנוזה וטיפול בסרטן

8 בינואר, 2017

יום העיון יתקיים באוניברסיטת תל אביב, באולם וולפסון 020 בפקולטה להנדסה.

** ההרצאות תינתנה בעברית

ההשתתפות ביום העיון בחינם, אך נבקש להרשם עד ל-3.1 אצל נעמה Nkappon@paragong.com

תכנית מקדמית

16:00-16:30	Gathering and coffee
16:30-16:35	Opening words Prof. Meital Zilberman, President of the ISMBE, Department of Biomedical Engineering, Tel Aviv university Asst. Prof. Daphne Weihs, Head of the ISMBE Scientific Committee, Faculty of Biomedical Engineering, Technion-IIT
16:35-17:00	Prof. Dan Peer, Chair, Cancer Biology Research Center, Faculty of Life Science, Tel Aviv University *From Glioma and ovarian cancer to hematological malignancies: novel approaches for therapeutic gene silencing using tagged nanomedicines*
17:00-17:25	Asst. Prof. Daphne Weihs, Faculty of Biomedical Engineering, Technion-Israel Institute of Technology *Cancer mechanobiology: how forceful interactions of tumor cells can predict the likelihood for metastasis*
17:25-17:50	Dr. Yael Mardor, Chief Scientist, The Advanced Technology Center, Sheba Medical Center and Faculty of Medicine, Tel Aviv University *MRI-based treatment response assessment maps (TRAMs) for high resolution differentiation between tumor and treatment effects in patients with brain tumors*
17:50-18:15	Dr. Ido Wolf, Head, Medical oncology, Oncology Division, Tel Aviv Sourasky Medical Center *Do we still need chemotherapy in 2017?*
18:20-18:45	Open discussion panel with the speakers

מפגש של "פורום הסטודנטים לאנרגיה מתחדשת"

ביום ג' ה-20.12 בין השעות 11:00-12:30, יתקיים מפגש של פורום הסטודנטים לאנרגיה מתחדשת של אוניברסיטת תל- אביב.

במסגרת המפגש תתקיים הרצאתו של פרופ' אורי שמיר מהטכניון בנושא: "ניתוח מערכות Systems Analysis)) ויישומים במשק המים".

המפגש יתקיים בבניין וולפסון להנדסה מכנית, חדר 206, קומה ב'.

תקציר ההרצאה ותקציר קו"ח של פרופ' אורי שמיר מצורפים.

20 בדצמבר 2016, 11:00

וולפסון 206

תקציר הרצאה לתלמידי פורום הסטודנטים לאנרגיה מתחדשת באוניברסיטת תל אביב

20.12.2016

ניתוח מערכות Systems Analysis)) ויישומים במשק המים

פרופ' אמריטוס אורי שמיר

הנדסה אזרחית וסביבתית, הטכניון – מכון טכנולוגי לישראל

חלק ראשון: הקדמה, בלי כניסה לפרטים מתמטיים ו/או טכניים. אני מתכוון להציג את החלק הראשון בגדר (כמעט) כותרות, על מנת להקדיש זמן מספיק לחלק השני, שייתן תוכן קונקרטי לסעיפים של החלק הראשון

ניתוח מערכות מהו? שמות אחרים: הנדסת מערכות, חקר ביצועים, אופטימיזציה
רכיביו של מודל אופטימיזציה: משתני החלטה, אילוצים, פרמטרים, פונקצית מטרה
ריבוי מטרות: אין פתרון אופטימלי, רק פתרון פשרה יעיל, חזית פארטו
שילוב של הבנת התוכן המקצועי ויכולת להפעיל ארגז כלים (שיטות אופטימיזציה)
תפקידם של מודליסטים במערכות ציבוריות, ריבוי בעלי ענין
תפקידם של מודליסטים במערכות פרטיות
החשוב ביותר: ניסוח נכון/מועיל/יעיל של המודל, בתהליך איטרטיבי
פירוט בזמן ובמרחב, אגרגציה, חיסכון בפירוט ובפרמטרים (Parsimony)
החשיבות של הצגת תוצאות במתכונת מועילה לצרכני התוצאות
שיטות לפתרון בעיות אופטימיזציה (על קצה המזלג), יעילות חישובית
הדגמת נושאים אחדים במשק האנרגיה

חלק שני: הדגמות שמטרתן להמחיש יישומים למערכת של ניהול משאבים ומערכות מים, בארץ ובעולם, בעיקר מנקודת ראות ציבורית, על הבסיס שהונח בחלק הראשון

תקציר קו"ח של פרופ' אורי שמיר

Prof. Uri Shamir is Professor Emeritus in the Faculty of Civil and Environmental Engineering, and Founding Director (1992-2003) of the Stephen and Nancy Grand Water Research Institute at the Technion - Israel Institute of Technology.

Prof. Shamir's expertise is hydrology and water resources management. He holds a BSc (1962) from the Technion and a PhD (1966) from the Massachusetts Institute of Technology. He lectures, conducts research and consults in Israel and around the world on hydrology and water resources management. Since 1992 Prof. Shamir has been a senior consultant to the Israeli Water and Sewage Authority (IWA) on matters of planning and policy, and previously (1967-92) was consultant to Mekorot, the National Water Supply Company. He is a member of the IWA core team that elaborated the 2012 Water Master Plan for Israel, a member of the negotiating team with Israel's neighbors on water, chairs the Steering Team for Monitoring Lake Kinneret and its Watershed, and is a member of the Steering Committee of the project "Israel-4" for rainfall enhancement by cloud seeding.

He was Visiting Professor in various universities and research institutes in the US and Canada, and has published widely on research and applications in hydrology of surface and groundwater, water supply systems, planning, design and operation of water resources systems, water policy, and management of international waters.

Prof. Shamir was Chairman of the Israeli Association of Water Resources (1984-1986), President of the International Association of Hydrological Sciences (1991-1995), Vice President of the International Union of Geodesy and Geophysics IUGG (1995-2003) and IUGG President (2003-2007). He was Member of the Executive Board of the International Council of Science (ICSU) for the periods 2005-2008 and 2008-2011.

Prof. Shamir is Chair of the Technical Advisory Committee of the World Water Assessment Programme (WWAP-TAC), the UN water programme led by UNESCO. The TAC advises the preparation of the World Water Development Reports (WWDRs) with several hundred contributors around the world; WWDR-2015 and 2016 reports are titled, respectively, "Water for a Sustainable World" and "Water and Jobs.

Prof. Shamir is Fellow of the American Geophysical Union, Fellow of the American Society of Civil Engineers, Foreign Member of the Spanish Academy of Science, Honorary Member of the Israel Water Resources Association, recipient of the 2000 International Hydrology Prize awarded jointly by IAHS, UNESCO and WMO, recipient of the 2003 Julian Hinds Award from the American Society of Civil Engineers "for significant contributions to water resources management", Fellow of the Environmental and Water Resources Institute of the ASCE, and recipient of the Life-Long Achievement Award of the Israeli Water Association.

November 2016 Personal web site: http://shamir.net.technion.ac.il

Material Sciences and Engineering: Departmental Seminar

In-situ X-ray crystallography of functional ferroelectric materials

Dr. Semen Gorfman

Department of Physics, University of Siegen, Siegen, Germany

28 בדצמבר 2016, 16:00

Room 206, Wolfson Mechanical Engineering Building

In-situ X-ray crystallography

BIOMEDICAL ENGINEERING SEMINAR

18 בדצמבר 2016, 14:30

נטלי דאי

תלמידת המחלקה להנדסה ביו רפואית לתואר שני תרצה בנושא:

Computational Modeling of Gene Expression in Microalgae

C. reinhardtii is a green microalgae used as a model organism for research on fundamental questions in molecular biology; in addition, it is commonly used as a model in the biotechnology industry for applications such as production of biopharmaceuticals, production of sustainable chemical compounds, and as a clean source of hydrogen production.

Gene expression is the process by which information encoded in the DNA is used for producing proteins and regulating their levels. Thus, in order to research and manipulate C. reinhardtii we must understand and model its gene expression.

In the lecture I will report the first systems biology study aiming to understand fundamental gene expression rules in C. reinhardtii. My study includes analyses of the entire C. reinhardtii transcriptome via supervised and unsupervised approaches .

העבודה נעשתה בהנחיית פרופ' תמיר טולר המחלקה להנדסה ביו-רפואית, אוניברסיטת תל-אביב

ההרצאה תתקיים ביום ראשון 18.12.16, בשעה 14:30

בחדר 315, הבניין הרב תחומי, אוניברסיטת תל אביב

ברצוננו לברך את מצטייני הרקטור בהוראה לשנת תשע"ו :

ידיעות נוספות בנושא

יום עיון של האיגוד להנדסה רפואית וביולוגית

חידושים באבחון, פרוגנוזה וטיפול בסרטן

8 בינואר, 2017

Dr. Ido Wolf, Head, Medical oncology, Oncology Division, Tel Aviv Sourasky Medical Center

Open discussion panel with the speakers

תקציר הרצאה לתלמידי פורום הסטודנטים לאנרגיה מתחדשת באוניברסיטת תל אביב

תקציר קו"ח של פרופ' אורי שמיר

עמודים