Aug 27

Modeling of Microscope Images for Early Detection of Fatigue Cracks in Structural Materials

162 Willard Building
3:35 p.m.

Additional Information:

From the perspectives of health monitoring and life extension of structural materials, this seminar addresses the problem of early detection of fatigue cracks in metallic materials (e.g., polycrystalline alloys). To this end, optical images have been collected from an ensemble of test specimens to construct computationally efficient models of crack evolution; these images are segmented into two major categories. The first category comprises images of (structurally) healthy specimens, while the second category contains images of specimens with cracks, including those in early stages of crack evolution. Based on this information, algorithms for early detection of crack formation are formulated in the setting of image classification, where the bag-of-words (BoW) technique has been used to develop models of the sensed images from a microscope, resulting in computationally efficient crack detection algorithms. To evaluate the performance of these crack detection algorithms, experiments have been conducted on a special-purpose fatigue testing apparatus, equipped with a computer-controlled and computer-instrumented confocal microscope system. The results of experimentation with multiple test specimens show excellent crack detection capabilities when the proposed BoW-based feature extraction is combined with quadratic support vector machine (QSVM) for pattern classification. Comparative evaluation with other classification tools establishes superiority of the proposed BoW/QSVM technique.
Najah F. Ghalyan is a Ph.D. candidate in Mechanical Engineering at Penn State. He received an M.S. in Electrical Engineering from Penn State in 2016 and an M.S. (in 2003) and B.S. (in 2000) in Mechanical Engineering from Al-Nahrain University-Iraq. His research focuses on Machine Learning for Decision-Making in Mechanical Systems.


Aug 29

Engineering Study Abroad Fair

Kunkle Lounge (Hammond Building)
11:00 a.m. to 3:00 p.m.

All engineering students are strongly encouraged to attend the engineering study abroad fair on Thursday, August 29, where you can learn more about a program that's the right fit for you! Stop by to enjoy free creamery ice cream and learn about programs that can work for any major, including locations that range from Australia, Spain, China and more. Sponsored by the College of Engineering's Office of Global Engineering Engagement.


Sep 07

College of Engineering Alumni Tailgate

Founders Lounge at Bryce Jordan Center
4:00 p.m. to 6:30 p.m.

Benefiting the Penn State Engineering Alumni Society Endowed Scholarship Fund to support Penn State student engineers


Sep 09

The Grand Challenges Scholar Program: 21st Century Engineering

E-Knowledge Commons
4:00 p.m.


Sep 12

Resume and Interviewing Skills Mini-Workshop

101 Reber Building - Gursahaney Family E-Knowledge Commons
4:30-6:00 pm

Registration link:


Sep 16-18

Research to Action: The Science of Drawdown

Penn Stater Hotel and Conference Center

This conference aims to connect international partners and research institutions. The three-day conference will focus on analysis and peer review of the portfolio of over 100 individual solutions, discuss synergies and interactions among sectors and evaluate implementation pathways including successful examples from around the world.


Sep 17

Engineering Networking Reception

Lower Level, Nittany Lion Inn
6:00 to 8:30 p.m.

The Engineering Networking Reception gives engineering students and recruiters the opportunity to meet and mingle in an informal atmosphere prior to the Technical Recruiting Day at Fall Career Days.


Sep 17-20

Fall Career Days

Bryce Jordan Center
11:00 a.m. to 4:00 p.m.

This multi-day, university-wide recruiting event is open to students in all majors at all Penn State campuses.


Sep 18

Mechanical Engineering Career Fair with Industry Friends

E-Knowledge Commons
7 - 9 p.m.


Sep 24-25

Microcredentialing Session: Value Engineering

125 Reber Building
4:30 - 8:30 p.m.

Register in 139 Reber.


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With more than 60 faculty members, 330 graduate students, and 800 undergraduate students, the Penn State Department of Mechanical Engineering embraces a culture that welcomes individuals with a diversity of backgrounds and expertise. Our faculty and students are innovating today what will impact tomorrow’s solutions to meeting our energy needs, homeland security, biomedical devices, and transportation systems. We offer B.S. degrees in mechanical engineering as well as resident (M.S., Ph.D.) and online (M.S.) graduate degrees in mechanical engineering. See how we’re inspiring change and impacting tomorrow at

Department of Mechanical Engineering

137 Reber Building

The Pennsylvania State University

University Park, PA 16802-4400

Phone: 814-865-2519