BREAKING KIRCHHOFF'S LAW OF THERMAL RADIATION AND ITS IMPLICATIONS IN ENERGY APPLICATIONS
REMINDER: ME Dept Seminar, Fri, 11/15, 2:30 PM, ENG 112
Dr. Bo Zhao, Kalsi assistant professor, department of mechanical engineering, at the University of Houston, will be visiting UMBC this Friday to give a seminar titled "Breaking Kirchhoff's Law of Thermal Radiation and Its Implications in Energy Applications." Please see abstract and Dr. Zhao's biography below.
Abstract:
Objects around us constantly emit and absorb thermal radiation. The basic properties that characterize these two processes are emissivity and absorptivity, respectively. For reciprocal systems, the emissivity and absorptivity for a given direction, polarization, and frequency are tightly restricted to be equal by Kirchhoff's law of thermal radiation. This restriction limits the control of thermal radiation and contributes to an intrinsic loss mechanism in photonic energy harvesting systems. In this talk, Dr. Zhao will discuss how one can break Kirchhoff's law by introducing nonreciprocity and the implications of this effort in solar energy harvesting.
Biography:
Dr. Bo Zhao joined the department of mechanical engineering at the University of Houston as an assistant professor in 2021. He received his Ph.D. from the Georgia Institute of Technology in 2016 and was a postdoctoral research associate at Stanford University before joining the University of Houston. His research interests are thermal radiation and photonics and their applications in advanced energy systems. Several of his works have been
recognized as highly-cited, cover, or featured articles. He received the best
poster award at the 2013 ASME International Mechanical Engineering Congress
& Exposition and was the recipient for the Viskanta
Young Scientist Award on Radiation Transfer in 2023.
Light refreshments will be provided.
We hope to see you there!
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Dr. Bo Zhao, Kalsi assistant professor, department of mechanical engineering, at the University of Houston, will be visiting UMBC this Friday to give a seminar titled "Breaking Kirchhoff's Law of...
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Mechanical Engineering
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Thu, 14 Nov 2024 13:09:32 -0500
PhD Proposal Defense - Jhon Portella Delgado
Tuesday, 11/19, beginning at 3:00PM
Advisor: Dr. Ankit Goel
Title: Adaptive Control with Input and State Constraint: THEORY AND APPLICATIONS
Abstract:
Physical systems evolve as time progresses. A system’s temporal behavior depends on its internal characteristics and interactions with its surroundings. A control signal that affects the state of the system can be carefully designed to achieve the desired behavior of the system. However, this approach, called the open-loop control, requires a detailed apriori description, in the form of a mathematical model, of the interaction between the state and the control signals. Feedback interconnections, resulting in closed loops, can be used to alter the system’s behavior, enabling closed-loop feedback control to reduce the modeling fidelity required to design control systems and achieve the desired temporal behavior of the system.
If a sufficiently detailed, control-oriented model is available, optimal control strategies can be used to optimize relevant metrics such as time of operation, fuel consumption, etc. Robust control strategies can be used to design control laws that reduce the sensitivity of relevant metrics to parametric variations in the system. When parameters in the system model are unknown, uncertain, or vary with time, adaptive control strategies can be used to achieve and maintain the desired behavior of the system despite a lack of knowledge of system parameters. However, real-world effects such as actuator constraints, measurement uncertainty, conflicting and infeasible system commands, and the system’s mathematically unmodelable complexity pose considerable challenges to optimal, robust, and adaptive control synthesis and weaken the performance guarantees.
Motivated by these fundamental challenges, this thesis thus is focused on exploring and developing adaptive strategies that can guarantee performance in the presence of system uncertainties, actuator constraints, and lack of control-oriented models. In particular, model-based adaptive control designs based on a backstepping framework and input-output linearization technique are developed for systems where a control-oriented model is available but the parameters of the system are unknown, uncertain, or time-varying. Such systems include aircrafts, multicopters, pendulum systems, rigid multi-body systems, etc, where physics-based models are available, but systems’ inertial and geometric properties introduce parametric uncertainties.
Data-driven adaptive control strategies based on retrospective cost optimization, extremum seeking control, etc., are explored for systems where only discrete measurements from the system are available. Various adaptive control techniques developed in this thesis are validated in a numerical simulation framework for multicopter control problems, aircraft control problems, quantum systems control problems, etc.
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Advisor: Dr. Ankit Goel Title: Adaptive Control with Input and State Constraint: THEORY AND APPLICATIONS Abstract: Physical systems evolve as time progresses. A system’s temporal behavior...
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Wed, 13 Nov 2024 11:30:40 -0500
Activism Blog Submission
Due today!
Reminder!
Submissions for the Women's Center Activism Blog were due TODAY November 13th.
We are extending the deadline to Friday November 15th, please submit them no later than that.
Email tmalik4@umbc.edu if you have any questions!
We look forwarding to reading your work
]]>
Reminder! Submissions for the Women's Center Activism Blog were due TODAY November 13th. We are extending the deadline to Friday November 15th, please submit them no later than that. Email...
Flyer
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Wed, 13 Nov 2024 10:00:23 -0500
Wed, 13 Nov 2024 10:01:24 -0500
Alumni Update
Career Updates from '22 & '23
Are you a CBEE Alumni? Stay connected via Linkedin
Let us know what you're doing now and share an update
here.
Zahra Ghassemi
Ph.D. '22 Chemical and Biochemical Engineering
Advisor: Jennie Leach, Ph.D.
After graduating from UMBC in May 2022, in July 2022 joined AstraZeneca in Maryland as a Senior Scientist in the Drug Dosage Form Development Group in Biopharmaceutical Development.
Caitlyn Dugan
M.S '23, Environmental Engineering
Advisor: Lee Blaney, Ph.D.
She recently began a position as a Remedial Project Manager at NAVFAC Washington.
Jahir Batista Andrade
Ph.D. '22 Chemical and Biochemical Engineering
Advisor: Lee Blaney, Ph.D.
Physical Scientist at the Smithsonian Tropical Research Institute (STRI) in Panama.
(Image: This list of UMBC Alumni employers should not be construed as sponsorship, affiliation, or approval by the trademark owner.)
]]>
Are you a CBEE Alumni? Stay connected via Linkedin Let us know what you're doing now and share an update here. Zahra Ghassemi Ph.D. '22 Chemical and Biochemical Engineering Advisor: Jennie...
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alumni-update
fall-2024
grad
Chemical, Biochemical and Environmental Engineering
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Chemical, Biochemical and Environmental Engineering
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Tue, 12 Nov 2024 14:11:16 -0500
Helpful Resources for International Students
To help you on your career journey.
Navigating the job market can
be a daunting process for any student, but international students in particular
often face additional challenges — from dealing with visa requirements and work
authorizations, to understanding cultural differences throughout the hiring
process. These obstacles can make the job search even more overwhelming, but
with the right tools and resources, international students can find success.
If
you’re an international student, we’re here to help! Here are some tools that
international students can use as they encounter the current job market
landscape.
Research. My
Visa Jobs.com provides H-1B Visa and
Green Card reports for every year, listing the top Visa sponsors (that is, employers)
via a number of different filters including occupation, job title, location,
industry, college, petition status, etc. If you’re just starting out on your
job search journey, this could be a good tool to use to determine which
employers in targeted industries and/or locations of interest are open to
hiring.
Search On-Campus. If you’re on an F-1 Visa, on-campus jobs are the most
accessible employment opportunities available to you. Therefore, you need to
know where to find them. This blog post
by the Career Center lays out five tips to help international students locate
on-campus employment. By knowing where to look, you can get a jump start on
your search before the wave of applications roll in.
Search Off Campus: If you’re an international student able to look
off-campus for a job or internship, you may want to check out GoinGlobal. With their job search function, you’re able to
search 16+ million worldwide opportunities in various industries. So, whether
you want to stay in Maryland or go elsewhere, GoinGlobal is a great tool to see
what’s out there.
Explore Career Paths: Not quite sure how to get to where you’d like to go in
your career? Look no further than Steppingblocks, a digital career counselor tool that uses data from
real-life alumni and professionals to show you various alumni career
trajectories. You can also explore skills, education, and employers for
particular industries as well. For more information, check out this blog post.
Network and Learn: When it comes to the job market, information is power.
The more you know, the more strategic you can be. Additionally, your network
means everything in the job search. The more people you know, the closer you’ll
get to landing a position. Therefore, if there are events available where you
can do both, it’s important to seize those opportunities when you can. On
November 11-15, the virtual International Career Summit is taking place,
jam-packed with workshops, presentations, and panels designed to equip you with
what you need to succeed in your job search. Learn more about
the Summit and be sure to register!
We hope these tools and
resources can help you confidently pursue opportunities, connect with employers
and alumni, and smoothly transition into the next phase of your professional
journey.
]]>
Navigating the job market can be a daunting process for any student, but international students in particular often face additional challenges — from dealing with visa requirements and work...
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internationalcareersummit
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jobmarket
jobresources
jobsearch
networking
oncampusjobs
steppingblocks
visasponsor
Career Center
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Career Center
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Mon, 11 Nov 2024 13:31:34 -0500
Tue, 29 Apr 2025 13:25:19 -0400
Researcher of the Week: Asiya Ahmed
How plants defend themselves
Asiya Ahmed is a senior Biological Sciences major, MLL Spanish Minor, and Public Health Minor. She is a STEM BUILD @ UMBC BTP Affiliate & UMBC 2024-25 URA Scholar.
Title of your research project:
“Investigating Genetic Interactions between FLK and HOS1 in Plant Defense and Flowering”
Describe your project:
I’m currently investigating how plants defend themselves from pathogens and abiotic stressors, such as cold temperatures and UV radiation, by examining a possible relationship between two genes named HOS1 and FLK. By analyzing this genetic interaction, my research could contribute to developing crops that are better suited to withstand environmental stresses and disease pressures.
Who is your mentor for your project?
My mentor is Dr. Hua Lu, who is in the Biological Sciences department. I first connected with Dr. Lu after taking her BIOL 302 (Molecular Genetics) course in my sophomore Spring semester. Near the end of the semester, I was interested in joining a research lab and started browsing the Biological Sciences Department website. I landed on Dr. Lu’s profile and looked into her work which caught my attention as she focuses on genetics, a field of science I took much interest in. After contacting her, I met with Dr. Lu and her team, and the atmosphere in her lab was amazing. They were all so welcoming and encouraging, and I knew that a supportive lab like this was the type of lab I would best thrive in.
How did you become interested in this project?
Towards the end of BIOL 302, we started learning techniques geneticists use in the lab such as PCR (Polymerase Chain Reaction), Gel Electrophoresis, and DNA extractions. I was very interested in this unit, so when I joined Dr. Lu’s lab, it was cool to see these exact techniques being done in real life in front of me. Now, I use these techniques myself to genotype my sample plants, allowing me to detect if they have any mutations in their FLK and/or HOS1 genes which can contribute to the possible genetic interaction I’m studying.
What has been the hardest part about your research/what was the most unexpected thing about being a researcher?
I think the hardest part was learning the science behind the work. There were many, many research papers I had to read, but they were not sufficient to understand the foundational concepts. I did my research on the weekends and met with Dr. Lu and PhD student Leah Vrydagh, who I directly work with, to go through the papers. It took me about three months to fully grasp what our lab aims to uncover. To me, the most unexpected thing about being a researcher is how good you get at public speaking. At certain points in the semesters I’ve been working, I have had to present my research and work to the team during our weekly lab meetings. At first, I messed up a lot because of stage fright, but now presenting comes at ease. Truthfully, these lab meeting presentations help tremendously when I present at research conferences or lead general body meetings for the Red Cross Club at UMBC.
What has been the most rewarding part?
The most rewarding part was putting all my 7 months of hard work together into an abstract and poster for my first-ever research conference presentation. This past February, I attended the American Physician Scientist Association (APSA) Mid-Atlantic Regional Meeting at Georgetown University where I presented said abstract and poster. I showcased the science I’ve learned, the techniques I’ve used, and the results I obtained to a diverse audience, ranging from undergraduate students to postdocs and physicians. Also, because I obtained this amazing opportunity through my research, I got to meet and speak with Dr. Anthony Fauci, Former Chief Medical Advisor to the President of the United States, who was our keynote speaker that day. He had shared advice about resilience and purpose which resonated with me and is something I carry as I navigate my studies and research. Without my research and Dr. Lu as my mentor, I never would’ve had this surreal experience.
How will you disseminate your research?
I will be presenting my research at URCAD in Spring 2025, and if there is another conference opportunity next semester, I plan to present there as well.
What is your advice to other students about getting involved in research?
Take rejection as a re-direction, not a failure. When I was trying to join a research lab on campus, I emailed more than a dozen principal investigators before Dr. Lu, and none of them responded (which I understood as they were very busy with their work and the courses they taught). I kept on emailing and emailing for more than a month, but even if I kept on getting no responses, I continued to look for more potential openings and email more PIs. After what felt like years, I finally got a response back from my now mentor. If I had stopped emailing after my first few rejections, I never would’ve done the research I have and made the connections I have today. Just keep on trying even if you fail multiple times because, at the end of the day, your perseverance will be worth it.
What are your career goals?
I am an aspiring physician so medical school is my next step after my studies at UMBC. I understand that it is a challenging path to become a physician, but by persevering and putting in the effort needed, I hope I’ll be able to achieve this goal of mine.
]]>
Asiya Ahmed is a senior Biological Sciences major, MLL Spanish Minor, and Public Health Minor. She is a STEM BUILD @ UMBC BTP Affiliate & UMBC 2024-25 URA Scholar. Title of your research...
https://ur.umbc.edu/
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Undergraduate Research
https://dev.my.umbc.edu/groups/undergradresearch
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Undergraduate Research
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Mon, 11 Nov 2024 09:37:44 -0500
Thu, 14 Nov 2024 10:04:19 -0500
Intern of the Week: Paul Panozzo
Check out Paul's internship!
Name:Paul Panozzo
Pronouns: He/Him
Semester of Internship:Summer 2024
Major: Individualized Study
Current Class Level:Senior
This semester I completed a(n):Internship
Internship, Co-op, or Research Site (Company/Organization Name):Baltimore Gas & Electric Co
Location of the Organization (City, State): Baltimore, Maryland
Title of Position:Quality Control Intern
Tell us about your internship, co-op, or research opportunity, including your day-to-day responsibilities:
In my department, I helped ensure that the workers in the field were performing their tasks as reported, safely and responsibly. This involved going out into the field with my department and observing people in action. Additionally, I was assigned several projects to work on within and outside of my department. All interns were grouped to coordinate on a project, culminating in a slideshow presentation detailing our experience and ideas. The company also organized numerous events to help us network with other branches.
Describe the process of obtaining your position. When did you hear of the position and submit your application?
I heard about this position from a family friend. I visited the company's website, where I found several internship postings and applied for all of them. I submitted my application approximately a week later, on October 20th of last year.
What resources did you use to find your current experience?
Family friend
What have you enjoyed the most about your position and organization?
I enjoyed meeting everyone in my department and seeing how genuinely passionate they were about their work.
How do you believe you have made an impact through your work?
I helped expedite the completion of several office tasks and assisted BGE in finding vendors for their annual Safety Expo.
What advice would you give to another student who is seeking an internship or similar experience?
I believe that anyone applying for a position at this company should confidently showcase their skills and make their capabilities known.
Please provide a short reflection or quote about what you liked most about your position / earning internship credit / working with the Career Center.
This position helped prepare me for working in a corporate setting and provided valuable real-world experience for a future career after college.
]]>
Name:Paul Panozzo Pronouns: He/Him Semester of Internship:Summer 2024 Major: Individualized Study Current Class Level:Senior This semester I completed a(n):Internship Internship, Co-op, or...
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Career Center
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Career Center
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Sun, 10 Nov 2024 14:22:01 -0500
Fri, 31 Jan 2025 09:33:18 -0500
MS Thesis Defense - Veda Venkata Ramana Bireshetty
Friday, Nov. 15
Hello ME Community,
Are you invited to join the hybrid Masters Thesis Defense of Veda Venkata Ramana Bireshetty, beginning at 12:00pm on Friday, Nov. 15.
You may join in the M.E. Conference Room, or online at
Meeting link:
https://umbc.webex.com/umbc/j.php?MTID=mea8f96c2049511eb5de3cb8f6b61fcc7
Advisor: Dr. Liang Zhu
Title: Evaluating microcracks in enhancing nanofluid flow from capillaries to the interstitial space in tumor core regions – theoretical simulations
Abstract:
Limited drug delivery outcomes using systemic delivery are attributed to tumor microenvironment. The objective of this study is to investigate the effect of introduction of microcracks in tumors on tumoral IFP reduction to facilitate therapeutic agent delivery to tumors. We developed a theoretical model for fluid transport in a spherical tumor incorporating Starling’s law and Darcy’s law. Results have shown that introduction of 4 microcracks in tumors is effective to lower the maximal IFP in the tumor from 1941 Pa to 1722.1 Pa, by up to 11.3%. Although the reduction of the average IFP in the entire tumor is limited, it is evident that this approach is effective to decrease the average IFP in the tumor core regions with up to 16.8% reduction from the baseline case without microcrack. We conclude that introducing several microcracks in tumors is an effective method to facilitate transcapillary fluid/drug flow to tumor interstitial fluid space.
]]>
Hello ME Community, Are you invited to join the hybrid Masters Thesis Defense of Veda Venkata Ramana Bireshetty, beginning at 12:00pm on Friday, Nov. 15. You may join in the M.E. Conference...
https://dev.my.umbc.edu/api/v0/pixel/news/145471/guest@my.umbc.edu/ed7c46b363c26be98008bf872cfdd9b8/api/pixel
Mechanical Engineering
https://dev.my.umbc.edu/groups/me
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Fri, 08 Nov 2024 08:57:46 -0500
PhD Dissertation Defense - Jiyuan Huang
Thursday, November 14, 12pm
Hello ME Community,
Are you invited to join the hybrid PhD Dissertation Defense of Jiyuan Huang, beginning at 12:00pm on Thursday, Nov. 14.
You may join in the M.E. Conference Room, or online at
Meeting link:https://umbc.webex.com/umbc/j.php?MTID=m23085fadb503677aab0a5c861b4bfe7c
Advisor: Deepa MadanTitle: High Performance Flexible and Scalable Thermoelectric Device and its Application as a Self-Sufficient Power Supply for Wearable Electronic Devices
Abstract: The rise of wearable electronics has emphasized the need for alternative power sources, as traditional batteries have limitations in terms of portability and cost. One promising solution is thermoelectric power generation, which can harvest waste heat or body heat to power these devices using thermoelectric(TE) materials. To address the global demand for low-cost, flexible thermoelectric generators (TEGs), this work describes a novel, energy-efficient TEG fabrication method of controlling the composite microstructure using 4synergetic factors.The combination of (1) a small amount of chitosan binder (0.05 wt%), (2)heterogeneous (mixed nanoscale and microscale) TE particles, (3) applied mechanical pressure of 20 MPa combined with curing at a low temperature of120°C for 30 mins and (4) thickness variation (170, 240, 300 μm), results in an enhanced TE property of TEGs. The combination of these four factors controls the micro and nanostructure of the films to decouple their electrical and thermal conductivity effectively by achieving a improved electrical conductivity and a reduced thermal conductivity. This resulted in figures of merit (ZTs) of 0.89 and 0.5 for p-BST and n-BTS thinner (170 µm) films, respectively, comparable to other additive manufacturing methods despite eliminating the high-temperature, long-duration curing process. The process was also used to fabricate a 6-couple TEG device, which could generate 357.6 µW with a power density of 5.0 mW/cm2 at a dT of 40 K. The device demonstrated air stability and flexibility for 1000 cycles of bending. Finally, the device was integrated with a voltage step-up converter to power an LED and charge and discharge capacitor at a ?T of 17 K, demonstrating its applicability as a self-sufficient power source.
This work also further explored possibilities and approaches to integrate the TEGs to real world applications. Although the TE results are promising, there are still 2 factors to concern, (1) chalcogenides materials like p-BST and n-BTS are toxic and earth-rare, (2) The temperature difference will not be ideal as it in the research labs. Therefore, it is important to find new materials and methods to address these concerns. Tetrahedrites are promising thermoelectric materials in high-temperature applications because they are non-toxic and earth-abundant. MXene (Ti3C2) is a novel 2D material which has ultra-high electrical conductivity. Herein, this work demonstrates the fabrication of scalable and sustainable Cu12Sb4S13 (CAS) based composite films and flexible TEG devices(f-TEGs) with 2D MXene nanosheets using the previously developed energy efficient method for room temperature applications. 2D MXene nanosheets introduced energy-barrier scattering and nanoscale features to effectively increase the room-temperature ZT to 0.22, 10% higher than bulk CAS, by decoupling electrical conductivity, Seebeck coefficient, and thermal conductivity. CAS and 2D MXenes were found to be environmentally safe through a bacterial viability study. The process is used to create a 5-leg f-TEG device producing a power of 5.3 µW and a power density of 140 at a dT of 25 K. Therefore, this work demonstrates that combining scalable and sustainable materials and methods is an effective strategy for high-performance room-temperature f-TEGs that could potentially harvest the low waste heat energy of the human body
]]>
Hello ME Community, Are you invited to join the hybrid PhD Dissertation Defense of Jiyuan Huang, beginning at 12:00pm on Thursday, Nov. 14. You may join in the M.E. Conference Room, or...
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Mechanical Engineering
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Thu, 07 Nov 2024 10:44:04 -0500
The Women's Center is Open until 10pm! (11/05)
Come if You Need a Space to Decompress During the Election!
The Women's Center will be open today until 10pm for people to come and build community during Election Night. From 7-10pm we will be hosting a self-care space in association The Center for Democracy and Civic Life's Election Night Extravaganza!
Please don't hesitate to visit us until 10pm tonight!
]]>
The Women's Center will be open today until 10pm for people to come and build community during Election Night. From 7-10pm we will be hosting a self-care space in association The Center for...
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Women's, Gender, & Equity Center
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Tue, 05 Nov 2024 17:13:25 -0500
Tue, 05 Nov 2024 17:13:48 -0500
