Categories
Jobs/Internships

Post Doc Research Opportunity: Polymer-based Novel Drug Delivery Systems

Under the direction of Dr. Feng Zhang, Associate Professor of Molecular Pharmaceutics and Drug Delivery, the postdoctoral fellow will conduct research in polymer-based novel drug delivery systems. https://pharmacy.utexas.edu/directory/feng-zhang 


Essential function: 

  • 70% polymer-based novel drug delivery system: Our projects focus on process design and material characterization of polymer-based biodegradable and retrievable implants for long-acting drug delivery. They involve various manufacturing techniques such as extrusion, injection molding, 3-D printing, and nano-manufacturing. The post-doc fellow will be in charge of study planning, experiment execution, and data analysis. 
  • 15% Assist with Managing Day to Day Operations: Assist with managing instrument operation and maintenance, and maintain lab supplies. 
  • 15% Supervision/Training: Assist in supervising and training students and laboratory staff members in routine laboratory techniques and safety practices. 


Required qualification:

  • Essential Qualifications: Ph.D. in polymer processing and engineering
  • Preferred Qualifications: Experience with compounding and characterizing polymeric materials. Experience in 3D printing and nano-manufacturing.

To apply, or if you have any questions about this position, please contact Dr. Zhang (zfsu@umd.edu).

Categories
Defenses

Dissertation Defense: Nicholas Jankowski

Title: Phase Change Materials For Vehicle And Electronic Transient Thermal Systems

Advisory Committee
Professor F. Patrick McCluskey, Chair
Professor Neil Goldsman (Dean’s Representative)
Professor Hugh Bruck
Professor Michael Ohadi
Professor Jungho Kim

Date & Time: November 5, 2020; 3:00-5:00pm 

Zoom Link: https://umd.zoom.us/j/91690449959?pwd=cUpZejJPOXdEdlJvMzhURVJ0c2U1dz09

Abstract:  Most vehicle operating environments are transient in
nature, yet traditional subsystem thermal management addresses peak
load conditions with steady-state designs.  The large, overdesigned
systems that result are increasingly unable to meet target system
size, weight and power demands.  Phase change thermal energy storage
is a promising technique for buffering thermal transients while
providing a functional thermal energy reservoir.  Despite significant
research over the half century, few phase change material (PCM) based
solutions have transitioned out of the research laboratory.  This work
explores the state of phase change materials research for vehicle and
electronics applications and develops design tool compatible modeling
approaches for applying these materials to electronics packaging.

This thesis begins with a comprehensive PCM review, including over 700
candidate materials across more than a dozen material classes, and
follows with a thorough analysis of transient vehicle thermal systems.
After identifying promising materials for each system with potential
for improvement in emissions reduction, energy efficiency, or thermal
protection, future material research recommendations are made
including improved data collection, alternative metrics, and increased
focus on metallic and solid-state PCMs for high-speed applications.

Following the material and application review, the transient
electronics heat transfer problem is specifically addressed.
Electronics packages are shown using finite element based thermal
circuits to exhibit both worsened response and extreme convective
insensitivity under pulsed conditions.  Both characteristics are
quantified using analytical and numerical transfer function models,
including both clarification of apparently nonphysical thermal
capacitance and demonstration that the convective insensitivity can be
quantified using a package thermal Elmore delay metric.

Finally, in order to develop design level PCM models, an energy
conservative polynomial smoothing function is developed for Enthalpy
and Apparent Capacity Method phase change models.  Two case studies
using this approach examine the incorporation of PCMs into electronics
packages: substrate integrated Thermal Buffer Heat Sinks using
standard finite element modeling, and direct on-die PCM integration
using a new phase change thermal circuit model.  Both show
effectiveness in buffering thermal transients, but the metallic phase
change materials exhibit the best performance with significant
sub-millisecond temperature suppression, something improved cooling or package integration alone were unable to address.

Categories
Announcements Workshops, Seminars, & Events

Future Leaders in Mechanical and Aerospace Engineering: Celebrating Diversity and Innovation

A NATIONAL WEBINAR SERIES  |  #MAEFutureLeaders
Wednesday, Oct. 14, 2020 – 11:00 a.m. PST / 2:00 p.m. EST

Join the webinar: http://bit.ly/MAEFutureLeaders

Sofia Arevalo

Ph.D. Student
Department of Mechanical Engineering

U.C. Berkeley

“Nanoindentation of Orthopedic Polymers: Mechanical Properties at the Macro-, Micro- and Nano-length Scales”
 

Nosakhare Edoimioya 

Ph.D. Student 
Department of Mechanical Engineering

University of Michigan
 
“Data-Driven Control for High-Throughput Additive Manufacturing” 

Each Presentation will be 20 minutes followed by a questions and answer period


Host: Professor Howard A. Stone

Donald R. Dixon ’69 and Elizabeth W. Dixon Professor in Mechanical and Aerospace Engineering, Princeton University


About Future Leaders in Mechanical and Aerospace Engineering: Celebrating Diversity and Innovation:This nationwide online seminar series will highlight research contributions by graduate students and postdocs from groups that are underrepresented within Mechanical Engineering and Aerospace Engineering. In addition to providing exposure and mentorship opportunities to the speakers, the seminar series will create a network among underrepresented students, postdocs and faculty in Mechanical and Aerospace Engineering departments across the country. The organizing committee asks that you please nominate speakers for the seminar series or volunteer to mentor speakers using the MAEFutureLeaders website.

Website  |  Sign up for mailing list  |  Twitter: #MAEFutureLeaders
 Questions? Email the seminar series organizers.

John Dabiri(Caltech)  | Samuel Graham(Georgia Tech) 
Allison Okamura (Stanford University)  |  Howard Stone (Princeton University)
Categories
Defenses

Dissertation Defense: Dynamics, Nonlinear Instabilities, and Control of Drill-Strings

Author: Xie Zheng

Advisory Committee:
Professor Balakumar Balachandran, Chair
Professor Amp Baz
Professor Nikhil Chopra
Associate Professor Jin-Oh Hahn
Associate Professor Maria Cameron

Date & Time: October 2, 2020 1pm-3pm

Abstract: Drill strings are flexible, slender structures, which are many kilometers long, and used to transmit the rotary motion to the drill bit in the process of drilling a borehole. Due to the flexibility of the drill string and nonlinear interactions between the drill bit and rock, these systems often experience severe vibrations, and these vibrations may cause excessive wear of drill bit and equipment damage. The aim of this dissertation effort is to further the understanding of the underlying mechanism leading to the undesired vibratory motions of drill strings, as well as to develop a viable control strategy that is applicable for mitigation of harmful vibrations.

 A reduced-order drill-string model with coupled axial and torsional dynamics is constructed. Nonlinear effects associated with dry friction, loss of contact, and the state-dependent delay, which all arise from cutting mechanics are considered. For the sake of analyses, a non-dimensionalized form of the governing equations is provided. Next, in order to study the local stability of the drill-string system, a linear system associated with the state-dependent delay is derived. The stability analysis of this linearized system is carried out analytically by using the D-subdivision scheme. The obtained results are illustrated in the terms of stability crossing curves, which are presented in the plane of non-dimensional rotation speed and non-dimensional cutting depth; non-dimensional rotation speed, and cutting coefficient, respectively. As to nonlinear analysis, a numerical continuation method is developed and used to follow periodic orbits of systems with friction, loss of contact, and state-dependent delay. Bifurcation diagrams are constructed to capture the possible routes from either a nominal stable operational state or a stable limit-cycle motion without stick-slip to a limit-cycle motion with stick-slip. It is shown that the system can experience subcritical Hopf bifurcations of equilibrium solutions and cyclic fold bifurcations. Furthermore, with the preceding work, an observer-based on controller design is proposed by using a continuous pole placement method for time delay systems. The effectiveness of the controller in suppressing stick-slip behavior is shown through simulations. 

Categories
Announcements Defenses

Upcoming Dissertation Defense – Ransisi Huang

Development of a General-Purpose Steady-State Simulation Framework for Vapor Compression Systems

Advisory Committee:
Professor Reinhard Radermacher, Chair
Associate Professor Jacob Bedrossian
Associate Professor Katrina Groth
Professor Jungho Kim
Professor Jelena Srebric
Research Scientist Vikrant Aute

Date & Time: October 8, 2020 2pm-4pm

Abstract
The vapor compression system is the dominating technology in heat pumping, air conditioning and refrigeration. Vapor compression is associated with significant energy consumption and high global warming potential. Steady-state simulation of vapor compression system is a crucial numerical technology that helps to assess and mitigate the energy and environmental impact of these systems. This dissertation aims to advance the steady-state modeling and simulation technologies for vapor compression systems toward higher level of flexibility, computational efficiency, and robustness, improving designs and reducing time to market.

First, the dissertation proposes a generalized solution methodology for the steady-state analysis of arbitrary vapor compression systems. A tripartite-graph based tearing algorithm is proposed to generically formulate the residual equations. The methodology was extensively validated by five test systems with capacities from 10 to 100 kW. The maximum simulation energy imbalance ( ) was 0.91%, and the maximum system performance deviation ( ) was 8.94%. The computation time for one system ranges from 2 to 851 s. The methodology was also applied to analyze two advanced vapor compression systems, presenting strong capability to contribute to the acceleration of their R&D stage.

Second, the dissertation develops an approximation-assisted modeling methodology to speed up the steady-state system simulation. Three approximation-assisted heat exchanger models were compared in terms of accuracy and computational efficiency. Kriging metamodel presented the highest accuracy among the three. For heat exchanger performance approximation, its overall ∆P and ∆h mean absolute error (MAE) were 4.46% and 0.9%, respectively. For system simulations, the maximum COP and capacity errors with Kriging metamodel were 2.54% and 1.45%, respectively. System simulation was sped up by a factor of 10 to 600, depending on the test
conditions.

Third, the dissertation proposes two convergence improvement approaches on the basis of nonlinear equation fundamentals, and assessed them on a standard vapor compression system as a first step, allowing for later application to more complex cycles. The assessment results show that a large initial Jacobian condition number presents low convergence probability at the current initial guess point. The results also indicate a correlation between component nonlinearity and simulation convergence. It was found that by changing the characterization methods in the heat exchanger models, 47 out of 51 originally non-converged cases were able to reach convergence.

Categories
Jobs/Internships

Faculty Vacancies

FacultyVacancies.com supports advancement in higher education and research helping Universities, Academies, Colleges, Faculties, Schools, Academic Departments, Institutes and Research Centers to recruit domestic and international talents. Here are the latest jobs from FacultyVacancies.com

Biological / Biomedical Engineering…..All Jobs

Chemical / Petroleum Engineering….. All Jobs

Civil / Environmental Engineering All Jobs

Computer Science / Engineering All Jobs

Electrical / Electronic Engineering All Jobs

Industrial / Production Engineering All Jobs

Materials Science / Engineering All Jobs

Mathematics / Mathematical Sciences All Jobs

Mechanical / Aerospace Engineering All Jobs

Categories
Announcements Jobs/Internships

Campus Connection Newsletter – Job Opportunities


 September 23, 2020 Newsletter


Register For The S3 Contest For A Chance To Win $1,000
Get your research ready and submit to the ASM Student Speaking Symposium (S3), created due to the cancellation of the in-person IMAT Student Poster Contest. Students will create a five minute video that will showcase their research and be evaluated by a panel of judges. Multiple cash prizes are offered. Learn More
Job Postings

Temporary Summer Student

USAjobs | Rockville, Maryland
There are a few vacancies located in various offices at the U.S. Nuclear Regulatory Commission. MOST OF THE JOB OPPORTUNITIES ARE AT NRC HEADQUARTERS IN ROCKVILLE, MD. There are limited engineering…

Senior Product Engineer

Intelsat | Mc Lean, VA
Apply now Senior Product EngineerReq ID:28936Travel:Less than 20%Location:McLean, VA, US, 22102#job-location.job-location-inline {display: inline;}Education:Four-year college degreeExperience:At least…

Process Engineer

Sodecia | Center Line, MI
Ensure that equipment meets or exceeds Sodecia or the customers requirements with respect to quality, flexibility and throughput. Establish process parameters and procedural requirements creating…



Graduated? Apply For Your Free Membership
If you have graduated from college and will not be returning to university full time, then you may qualify for a complimentary year of ASM Emerging Professional membership! All you need to do is submit a brief application form.
 
Learn More
Jointly Developing Photonics Test ApplicationsFormFactor Inc., Livermore, Calif., and Physik Instrumente, Germany, have created a MeasureOne partnership to accelerate development of applications to test silicon photonics devices in wafer and die form. MeasureOne is a commitment between… Read Full Article


Probing Electrical Waveforms On FinFET Transistors
Engineers from Thermo Fisher Scientific presented a discussion of a technique in which the voltage-contrast mechanism of a scanning electron microscope is used to probe electrical waveforms on FinFET transistors that are located within active integrated… Read Full Article

Categories
Announcements Jobs/Internships

Faculty Opening: Mechanical Engineering – University of Michigan

Position Description

The Department of Mechanical Engineering (ME), University of Michigan (U-M), Ann Arbor, seeks outstanding applicants for full-time, tenured or tenure-track, faculty positions. Underrepresented
minorities and women are strongly encouraged to apply. The positions are open for either junior or senior-level appointments. The focus of this search is for candidates working at the intersection of engineering, social justice, or common good, including work that addresses anti-racism, inclusion, equity or other topics. Prior record at this intersection is valued, but not essential for junior applicants.
The candidates’ research, teaching and inclusion statements should define common good or social justice as they apply towards their career goals.

Applicants should have an earned Ph.D. degree in mechanical engineering or an appropriate field. We seek scholars who will provide inspiration, leadership, and impact in research, teaching, and service. To ensure full consideration, candidates are encouraged to apply now and before December 1, 2020, as applications will be reviewed immediately upon receipt.

Required Application Details

(1) a detailed c.v.

(2) statements on research and teaching
and contributions to diversity, equity and inclusion (prior and/or proposed work related to the intersection of engineering and social justice or common good can be captured in any or all of these
statements)

(3) up to three representative publications, and (4) the names and contact information of at
least three references.

Applications must be submitted electronically at http://me.engin.umich.edu/facultysearch.

Categories
Jobs/Internships

Campus Job Opening – Post Doctoral Associate

Position Details:

The successful candidate will take an exciting and leading technical role in a DOE/ARPA-E project in the REPAIR program that is being led by UMD. The position involves thermal and structural modeling of a natural gas distribution pipe environment during a high-temperature (>1000 degC) sintering process that is used to deposit a new layer of metal within an existing pipe. The goal is to quantify the temperature profile within the pipe and its surroundings for a range of process conditions, and to quantify the structural properties of the “pipe in pipe” structure that results from the deposition process. The modeling results will directly inform process design and innovation, and the successful candidate will be deeply involved in improving the metal deposition process for this natural gas pipe application.

The position will be in the Albertus research group in the Department of Chemical and Biomolecular Engineering, but also work closely with the Hu research group in the Department of Materials Science and the three project industrial parners (HighT-Tech LLC, a UMD spin out, Diakont, and Exelon). This will be a fast-paced, results-oriented, high-profile, and team-based project.

More information on the REPAIR program is available here:
https://arpa-e.energy.gov/?q=arpa-e-programs/repair

More information on the UMD project is available here:
https://arpae.energy.gov/sites/default/files/documents/files/REPAIR_Project_Descriptions_FINAL.pdf

Qualifications:

  • A PhD or equivalent experience in engineering or the physical sciences.
  • Significant experience with 3D, transient, finite-element modeling of thermal, structural mechanics, and/or related processes.
  • A strong publication record demonstrating originality, technical depth, and the ability to conduct research both independently and as part of a team.
  • Strong physical intuition and an ability to identify and quantify the leading order effects in a 3D, multi-physics, coupled, physical system.
  • Effective written and oral communications skills.

Preferences:

  • Modeling of conjugate heat transfer.
  • Experience with a modeling package such as Comsol or Ansys.
  • Demonstrated experience with IP creation and filing patents. The project will include significant opportunities for creating and filing IP.

Best Consideration Date: 11/01/2020

Apply Here!

Categories
Announcements Workshops, Seminars, & Events

KLA eUser Meeting – Nanomechanical Testing

KLA is hosting a nanomechanical testing eUser meeting scheduled in the North America time zone on September 29th & 30th, 15:00 to 17:00 (New York). We would be honored to have you attend! We would like to share three exciting features about this free event.

  1. With over 15 presenters in the 4-hour meeting, this meeting promises to be jam packed with fun and extensive expertise,
  2. There are 8 Special Focal sessions that enable attendees to customize their meeting experience and generate the highest impact for their time spent in the meeting,
  3. All events are online, so they are easily accessible.

The schedule for this event is listed below. All registrants will receive links to the recorded presentation sessions. Questions should be directed to Bryan Crawford (Bryan.Crawford@kla.com). Please review the schedule and register here, today!     

Event Schedule

Dates: September 29th & 30th (2 Days and only 2 hours/day)

Time: 15:00 to 17:00 (New York) each day

Registration: https://kla-tencor.zoom.us/meeting/register/tJIlfuitqz0rH9RK1AoY1uO6kBQ01VLusE1rv 

Day 1 (Sept 29th)

15:00   Welcome and Kick-off (John Swindeman, KLA)

15:05   Whole Group Presentation (Dr. Warren Oliver, KLA)

15:35   Parallel Special Focal Sessions lead by academic and industry experts. Attendees choose one session during registration.

§  Nanoindentation in Battery Materials, Prof. Erik Herbert (Michigan Tech University)

§  Strain-Stress Curves via Indentation, Jennifer Hay (KLA)

§  High Speed Property Mapping by Nanoindentation, Dr. Maria Kosmidou (University of Kentucky)

§  Nanoindentation study of N95 masks Dr. Yujie Meng (KLA)

16:05   Tornado Talk – whirlwind presentation, Gianmarco Monfared (UC Davis)

16:15   Tornado Talk – whirlwind presentation, Fereshteh Mallakpour (MTU)

16:35   Whole Group Presentation, Prof. Wendy Gu (Stanford University)

16:55   Round Table Discussion (moderated by Bryan Crawford with panelist from the Special Topic Sessions)

Day 2 (Sept 30th)

15:10   Whole Group Presentation (Prof. Dannielle Cote, Worcester Polytechnic Institute)

15:40   Parallel Special Topic Sessions lead by academic and industry experts. Attendees choose one session during registration.

§  High Temperature Nanoindentation, Prof. Jaafar El-Awady (Johns Hopkins University)

§  Nanoindentation at High Strain Rates, Dr. Kurt E Johanns (KLA)

§  Optical Profilometry and Applications, Rae Zeng (KLA) 

§  Nanoindentation in Undergraduate Education, Dr. Susan Gentry (UC Davis)

16:05   Tornado Talk – whirlwind presentation by graduate student at WPI. 

16:15   Whole Group Presentation, Prof. Dan Gianola (University of California, Santa Barbara)

16:45   Mixed Social and Round Table Discussion, Moderated by Bryan Crawford with panelist from all Special Topic sessions.

Register here, today!