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Friday, November 5, 2021
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10:00 AM
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12:00 PM
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Virtual Study Abroad Peer Advising
- Location: > See description for location
- Contact: International Programs Office
- Description: Would you like to talk to a student about what it's like to study abroad? What were classes like? What was the best and most challenging aspect? Would you do it again? Stop by our Zoom room with your questions!
Zoom Link: https://umassd.zoom.us/j/94877677116?pwd=RklyZzNuMld4eEJZNkRPdzNHdnkzdz09
- Topical Areas: Faculty, Staff and Administrators, Students, University Community, Study Abroad
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1:00 PM
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2:00 PM
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ECE Seminar* Speaker: Dr. Yisha Xiang, Assistant Professor, Texas Tech University
- Location: > See description for location
- Cost: Free
- Contact: ECE: Electrical & Computer Engineering Department
- Description: Topic: Data-Driven Markov Decision Processes with Parameter Uncertainty: Application to Maintenance and Remanufacturing Planning
Zoom Teleconference: https://umassd.zoom.us/j/96716388828
Abstract:
We consider the problem of maintenance and remanufacturing planning with the objective of minimizing the total operational and environmental costs. Determining the optimal maintenance and remanufacturing timing, first and foremost, requires modeling of the state transitions of a system. The estimation of these probabilities, however, often suffers from data inadequacy and is far from accurate, resulting in serious degradation in performance. To mitigate the impacts of the uncertainty in transition probabilities, we develop a novel data-driven modeling framework for maintenance/remanufacturing planning in which decision makers can remain robust with respect to statistical estimation errors. We model this planning problem as a robust Markov decision process, and construct ambiguity sets that contain the true transition probability distributions with certainty using historical data. We further establish structural properties of optimal robust policies and insights for maintenance and remanufacturing planning. A computational study on the NASA turbofan engine shows that our data-driven decision framework consistently yields better worst-case performances and higher reliability of the performance guarantee.
Biography:
Dr. Yisha Xiang is the E. L. Derr Assistant Professor in the Department of Industrial, Manufacturing & Systems Engineering at Texas Tech University. Her current research and teaching involve data-driven decision-making under uncertainty and statistical machine learning. Her research has been funded by National Science Foundation, including a CAREER grant, DOE, and industry. She was the recipient of the P.K. McElroy award, Stan Oftshun award, and Doug Ogden award for best papers at the Reliability and Maintainability Symposium. She received her BS in Industrial Engineering from Nanjing University of Aero. & Astro., China, and MS and PhD in Industrial Engineering from University of Arkansas. She is an Associate Editor for IISE Transactions and IEEE Transactions Automation Science and Engineering, and she is a member of IISE and INFORMS.
The Seminars is open to the public free of charge.
*For further information, please contact Dr. Honggang Wang at 508.999.8469, or via email at hwang1@umassd.edu.
- Topical Areas: General Public, University Community, College of Engineering, Electrical and Computer Engineering, STEM
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10:00 AM
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11:15 AM
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Accounting and Finance Department Research Seminar
- Location: > See description for location
- Contact: > See Description for contact information
- Description: Subject: Accounting and Finance Department Research Seminar
The Accounting and Finance Department announces the following research seminar.
Speaker: Associate Professor. Jeffrey Chen (North Dakota State University)
Title: Proxy Contests and Debt Contracting: The Interplay of Managerial, Shareholder, and Creditor Incentives
Date: Friday, November 5, 2021
Time: 10:00-11:15 AM
Location: via Zoom Meeting
https://umassd.zoom.us/j/4387551509?pwd=bVB2QzdtRmFCdkk1WTVQSUxHMS9iQT09
Please contact Prof. Hongkang Xu at hxu5@umassd.edu for Meeting ID and Passcode.
Abstract: We evaluate how heterogeneity in the strategic interplay among shareholders, creditors, and managers influences debt contracting behavior around proxy contests. We find that, subsequent to proxy contests, new loan originations have significantly higher spreads and more stringent non-pricing contracting terms. The effect, however, occurs largely in contest firms where CEOs are provided with tournament-based risk-taking incentives. Further, creditor simultaneous equity holdings and CDS trading attenuate contests' impact. Finally, contests that culminate in voting and dissident victory experience the largest increase in loan pricing. Overall, our results suggest an increase in the agency cost of debt subsequent to proxy contests, particularly when managerial risk-taking incentives are high, creditors do not simultaneously hold target firms' equity or have no access to the CDS market to seek protection.
For additional information, please contact Prof. Hongkang Xu at hxu5@umassd.edu.
- Topical Areas: Faculty, Students, Academic Affairs, Accounting and Finance, _Charlton College of Business, Lectures and Seminars
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3:00 PM
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4:00 PM
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Financial Aid Help Labs
- Location: > See description for location
- Contact: > See Description for contact information
- Description: Financial Aid Help Labs: Library 128
Financial Aid Services wants to remind all students to file their FAFSA! Join the Financial Aid Services Street Team for FA Help Labs on Wednesdays from 3 to 4 p.m. and Fridays from 3 to 4 p.m. in Library 128 for help filing your FAFSA and learning more about financial aid.
Contact Mark Yanni
myanni@umassd.edu
- Topical Areas: Students, Students, Graduate, Students, Law, Students, Undergraduate, Financial Aid
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2:00 PM
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4:00 PM
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ECE Seminar* Speaker: Dr. Nelson Tabiryan
- Location: > See description for location
- Cost: Free
- Contact: ECE: Electrical & Computer Engineering Department
- Description: Topic: The Fourth Generation Optics, The Concept, Materials, Technology, and Applications
Location: Dion 109
ZOOM TELECONFERENCE: https://umassd.zoom.us/j/95751135458
The Seminars is open to the public free of charge.
*For further information, please contact Dr. Yifei Li at 508.999.8841, or via email at yifei.li@umassd.edu
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Changing the way optics is made. Changing the way optics is used.
The Fourth Generation Optics
The Concept, Materials, Technology, and Applications
Nelson Tabiryan
Beam Engineering for Advanced Measurements Co
1300 Lee Road, Orlando, Florida, USA
The Seminar provides an intuitive introduction into the underlying principles of the new generation of optical components and systems, requiring only basic knowledge (or just an interest) in optics. The course will make it evident for attendees that:
- micrometer-thin film coatings may perform as high-power lenses, prisms, spiral phase plates, beam shaper, etc., and in a broad band of wavelengths comparable to that of glass and other transparent optical materials;
- optical functions can be switched on and off with low voltage controls;
- thin film optical components can be combined to provide versatile beam control functions such as all-electronic beam steering with random access capability, switching between multiple focal points and beam shapes, spectral tuning, variable transmission, etc.
- ultralight and ultrathin films may be used as primary optics for very large telescopes for space communication as well as imaging.
The first generation of optics relied on shaping an optically transparent material such as glass.
Modulating refractive index instead of shape - the second generation of optics - allows thinner components but compromises bandwidth. Anisotropic materials make available two more parameters for controlling light beams. LCD industry is exploring one of them, modulation of effective birefringence - the third generation of optics. A recent breakthrough, the fourth generation of optics, relates to patterning optical axis orientation in the plane of anisotropic films. Obtained as thin film coatings on any desired substrate, including plastic, flat or curved, all different varieties of optical functions can now be produced using the same materials and processes. 4G lenses, prisms, vortex waveplates, etc., are thin films of continuous structure allowing low-cost manufacturing just by inducing desired orientation patterns by a touch of polarization modulated light.
Unlike metamaterials, 4G optics provides high efficiency with no haze, is readily scalable to large aperture sizes, it is at a high level of maturity, and is enabling modern applications including LiDARs for auto-navigation, augmented reality displays, adaptive ophthalmic lenses, space telescopes, and even solar sails.
References:
N. Tabiryan, D. Roberts, D. Steeves, and B. Kimball, "4G Optics: New Technology Extends Limits to the Extremes," Photonics Spectra, March, 2017, pp. 46-50.
Hall of Fame Article: N. Tabiryan, et al. "Advances in Transparent Planar Optics: Enabling Large Aperture, Ultrathin Lenses," Adv. Optical Mater. 2001692 (1-24) 2021.
www.beamco.com info@beamco.com Tel: 407-734-5222
- Topical Areas: General Public, University Community, College of Engineering, Electrical and Computer Engineering, STEM
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12:00 PM
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1:30 PM
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Virtual Study Abroad Advising
- Location: > See description for location
- Contact: International Programs Office
- Description: Have a quick question for a study abroad advisor? Would you like to start planning your study abroad experience? Join us on zoom to discuss opportunities. Students will be seen on a first-come, first-served basis.
Zoom link: https://umassd.zoom.us/j/98493726095?pwd=QUEySVNkTVdnS0hUNm94Q1NqQ0FkQT09
- Topical Areas: Faculty, Staff and Administrators, Students, University Community, Study Abroad
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Online Teaching and Learning Strategies
- Location: Online
- Contact: CITS Instructional Development
- Description: A rigorous four-week, fully online certification course that introduces faculty to the current research and best practices for online teaching and learning. Using their own discipline-specific course materials for activities, faculty will work independently, collaboratively with peers from across campus, and with Instructional Designers to design and build one unit of online instruction in a myCourses site. This unit will meet the Quality Online Course Review Rubric criteria and be a model that faculty can reference and replicate as they continue to develop their upcoming fully online course(s).
- Topical Areas: Training, Workshop, audience: Faculty, audience: Staff
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