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All thesis-option graduate students at Purdue must deposit the final products of their research with the Purdue University Graduate School Thesis & Dissertation Office. The Thesis & Dissertation Office will help ensure that all pre-requisites for deposit have been fulfilled and that your thesis or dissertation meets the quality standards established by the Graduate Council Standing Committee on Theses and Dissertations.

Controlled Data

Students who are working with data that is subject to EAR, ITAR, DFARS Clause 252.204-7012, or other controlled data need to follow a specific process to submit their thesis or dissertation. This process is outlined at  Guidance Document - Controlled Thesis Submission Process .

Your Thesis/Dissertation review MUST be an in-person review with a member of the Thesis Office. Email [email protected]  to schedule.

Your document is  NOT  to be submitted through the Hammer repository.

Your document is  NOT  to be run through iThenticate.

If any students, faculty, or staff have questions, do not hesitate to contact Nicole Barr  or Elizabeth Wagner .

The Deposit Process

1. complete the electronic thesis acceptance form (etaf) and required surveys.

• The ETAF should be initiated after your final defense and will be available through your Plan of Study portal. You will not be able to make any edits to a submitted ETAF. If your selections need editing, contact us. Please allow AT LEAST 2 business days the ETAF to be signed by all committee members and to receive departmental approval.
• The Processor of the ETAF will process your form once you've completed step 2 of the deposit process and complete the required survey(s).

A helpful guide to initiating your ETAF is available here:  Student Instructions for Initiating the Thesis Acceptance Form (PDF) .

• Master's candidates need to complete the Graduate School Exit Questionnaire before their defense.
• Doctoral candidates need to complete the Graduate School Exit Questionnaire and the Survey of Earned Doctorates before their defense.

2. Submit your ETD to Hammer Research Repository  (HammerRR)

• Once your ETAF has been approved through the Thesis Form Head, you will receive an email with instructions on how to upload and submit your final deposit to HammerRR. At this point, you will be able to log-in to your Plan of Study portal and find the link to submit your thesis to HammerRR.
• After you've created a profile and have uploaded your ETD, a staff member of the Thesis & Dissertation Office will review your submission for any formatting errors and will contact you regarding necessary changes. This process will continue until you have met a satisfactory formatting condition, after which, you will receive an email regarding the acceptance of your ETD to the Graduate School.
• You must upload your thesis to HammerRR at least 24 hours in advance of the Deposit Deadline to allow our staff adequate time to review your submission. ETAF 9 must be approved by the 5pm deposit deadline.

3. Pay the Deposit Fee

• Master's Thesis Fee $90.00
• Ph.D. Dissertation Fee $125.00

West Lafayette Campus West Lafayette candidates will pay the deposit fee through their myPurdue accounts. The thesis fee will appear in a candidate's student account 5-10 business days after the HammerRR submission is approved.

Regional Campuses Calumet and Fort Wayne candidates will pay their fees to their local bursar's office as part of the clearance process by their regional campus thesis advisor.

IUPUI Campus IUPUI candidates will receive an emailed bill following their successful deposit.

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American Studies

• Scholarly Societies, Associations & Journals
• Dissertations & Theses

Finding Dissertations

• America: History and Life Index of literature covering the history and culture of the United States and Canada, from prehistory to the present. Covers over 2,000 journals published worldwide. Strong English-language journal coverage is balanced by an international perspective on topics and events, including abstracts in English of articles published in more than 40 languages.
• Historical Abstracts Abstracts of selected journal articles, citations of books, book reviews and dissertations on the history of all parts of the world (excluding the United States and Canada) from 1450 to present.
• PsycINFO This database contains more than one million citations and summaries of journal articles, book chapters, books, dissertations and technical reports, all in the field of psychology. It also includes information about the psychological aspects of related disciplines such as medicine, psychiatry, nursing, sociology, education, pharmacology, physiology, linguistics, anthropology, business and law. Journal coverage, which spans from 1887 to present, includes international material selected from more than 1,700 periodicals in over 35 languages.
• Sociological Abstracts This database abstracts and indexes the international literature of sociology and related disciplines in the social and behavioral sciences. The database provides abstracts of journal articles and citations to book reviews drawn from thousands of serials publications and also provides abstracts of books, book chapters, dissertations, conference papers and working papers. Cited references are included for many journal articles.

Dissertations & Theses

The Purdue University Libraries collects, preserves, and provides access to dissertations as original works of scholarship in conjunction with doctorates awarded by the University. Other pertinent student works such as master's and honors theses may also be collected.

What is the difference between a thesis and a dissertation?

At Purdue, “thesis” typically refers to a Master’s program and “dissertation” refers to the Ph.D program. In the early years a thesis was written in many undergraduate programs (i.e B.S. in Engineering).

How can I find dissertations that were written at Purdue?

The Purdue Libraries holds one copy of each title from 1882 to present. In some cases these have been marked confidential or have restrictions in place for a limited period of time. The original paper copies do not circulate and must be viewed in Archives and Special Collections. These can be requested through the Libraries catalog . Please log in to request your item. When the request is received, it is pulled from the storage Repository and delivered to be viewed in the Archives and Special Collections Research Center on the 4 th floor of the Humanities and Social Sciences Library (HSSE). This is located in Stewart Center, 504 W. State Street, West Lafayette, IN 47907. You will receive a confirmation email when the item is ready along with directions to the Archives.

More information:

The first Thesis is available to be viewed in Archives and Special Collections . Early Purdue University Theses and Dissertations (starting in 1882 and scanned up to 1906 so far) have been scanned and are available online. Open access copies are available online through the Theses and Dissertations, Purdue e-Puds (including some copies from ProQuest). Copies available for loan: Some of the theses and dissertations have been microfilmed and can be requested for off campus use through Interlibrary Loan (ILL) . Also, some paper duplicates will show up in the catalog, please request the copy that does not say “Only viewable in the Archives.” Alumni can request an electronic copy of their theses or dissertation from the past by contacting [email protected].  If you have questions about depositing your thesis or dissertation, please contact the graduate school Thesis and Dissertation Office . 

How can I find theses or dissertations from U.S. institutions?

Go to Dissertations and Theses (PQDT) . It offers a comprehensive listing of bibliographic entries for theses and dissertations in the Dissertation Abstracts database. Theses and dissertations listed since 1997 are available in PDF digital format for users affiliated with Purdue University with access to theses and dissertations from CIC institutions. For those entries not full-text, 24-page previews are available. For non full-text entries and possible borrowing of non-Purdue titles, consult Interlibrary Loan .

How can I find dissertations that are free?

• From Center for Research Libraries (CRL) search for available paper-bound titles. CRL has more than 750,000 uncataloged foreign [non-U.S. or Canadian] doctoral dissertations, of which approximately 20,000 are presently in this database. Please consult with CRL if you are unable to find a dissertation that you may require.
• Cybertheses permits access to selected French dissertations from 1972 to the present. This database can provide access to another index where full-text provision for selected dissertations [theses in French] may be provided.
• NDLTD - Networked Digital Library of Theses and Dissertations . NDLTD provides access to thousands of digitally available dissertations and theses. Both U.S. and foreign dissertations and theses can be accessed through this site for those institutions participating within this association.
• << Previous: Scholarly Societies, Associations & Journals
• Last Edited: Apr 1, 2024 3:29 PM
• URL: https://guides.lib.purdue.edu/amstudies

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APPLICATIONS OF ACOUSTIC RADIATION MODES IN ACOUSTIC HOLOGRAPHY AND STRUCTURAL OPTIMIZATION FOR NOISE REDUCTION

Acoustic holography is a powerful tool in the visualization of sound fields and sound sources. It provides engineers and researchers clear insights into sound fields as well as their sound sources. Some widely-used methods include Nearfield Acoustical Holography (NAH), Statistically Optimized Nearfield Acoustic Holography (SONAH) and the Equivalent Source Method (ESM). SONAH and ESM were developed specifically to tackle the intrinsic deficiency of the Fourier-based NAH which requires that the sound field fall to negligible levels at the edges of the measurement aperture, a requirement rarely met in practice. Besides the aforementioned methods, the Inverse Boundary Element Method (IBEM) can be used, given sufficient measurements and computational resources. As useful as they are in visualizing the sound field, none of these methods can provide direct guidance on potential design modifications of the observed structure in order to unequivocally reduce sound power radiation. Acoustic radiation mode analysis has previously been primarily associated with active noise control applications. Since the radiation modes radiate sound power independently, it is only necessary to modify the surface vibration patterns so that they do not couple well with the radiation modes in order to guarantee a reduction of the radiated sound power. Since the radiation modes are orthogonal and complete, they can be used as the basis functions through which the source surface vibration can be described. Therefore, an acoustic holography method based on the acoustic radiation modes will enable the sound power ranking of the modal components of the surface vibration pattern, and in turn, point out the component(s) which should be targeted in order to reduce the overall sound power. However, use of the acoustic radiation modes in the inverse procedure comes with a price: the detailed geometry of the object to be measured must be obtained, thus enabling the calculation of acoustic radiation modes and the modal pressures. But this is not an issue for original equipment manufacturers given that almost all prototypes are now designed with CAD, as is the case with the engine example to be described next.

In modern engine design, downsizing and reducing weight while still providing an increased amount of power has been a general trend in recent decades. Traditionally, an engine design with superior NVH performance usually comes with a heavier, thus sturdier structure. Therefore, modern engine design requires that NVH be considered in the very early design stage to avoid modifications of engine structures at the last minute, when very few changes can be made. NVH design optimization of engine components has become more practical due to the development of computer software and hardware. However, there is still a need for smarter algorithms to draw a direct relationship between the design and the radiated sound power. At the moment, techniques based on modal acoustic transfer vectors (MATVs) have gained popularity in design optimization for their good performance in sound pressure prediction. Since MATVs are derived based on structural modes, they are not independent with respect to radiated sound power. In contrast, as noted, acoustic radiation modes are an orthogonal set of velocity distributions on the structure’s surface that contribute to the radiated sound power independently. As a result, it is beneficial to describe structural vibration in terms of acoustic radiation modes in order to identify the velocity distributions that contribute the majority of the radiated sound power. Measures can then be taken to modify the identified vibration patterns to reduce their magnitudes, which will in turn result in an unequivocal reduction of the radiated sound power. A workflow of the structural optimization procedure is proposed in this dissertation.

While acoustic radiation modes have great efficiencies in describing radiated acoustic power, the computation of acoustic radiation modes can be time consuming. In the last chapter of this thesis, a novel way of calculating acoustic radiation modes is proposed, which differs from the traditional singular value decomposition of the power radiation resistance matrix, and which is more efficient than previously proposed procedures.

Degree Type

• Doctor of Philosophy
• Mechanical Engineering

Campus location

• West Lafayette

Advisor/Supervisor/Committee Chair

Advisor/supervisor/committee co-chair, additional committee member 2, additional committee member 3, usage metrics.

• Acoustics and noise control (excl. architectural acoustics)

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Thesis & Dissertation Overview 

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When writing a long document such as a thesis or dissertation over a sustained time period, writers may find it difficult to stay motivated and make progress. Some institutions offer “dissertation retreats” or camps for helping writers make progress. An Intensive Writing Experience (IWE) is a similar event in which a writer makes a concerted effort both to make progress on a document and to become a better writer. The writer sets aside a predetermined amount of time in order to make progress on a particular writing project, such as a dissertation.  The material here is meant to be used to conduct a Personal IWE that a writer can use when a group event such as a retreat or camp is not available.  

This section contains detailed directions for setting up a Personal IWE.  We've included vidcasts and handouts useful for a potential three-day event covering a variety of writing-related topics. Writers can view the vidcasts and read through the handouts and then apply what they have learned to their own writing. We suggest starting with the handout entitled “Conducting a Personal Intensive Writing Experience (IWE)”; this will provide details for structuring time and offers a schedule for the order of topics across a multi-day event.

‘Your good work does not go unnoticed’: College honors faculty, staff, students in spring awards ceremony

The College of Education held its annual faculty, staff, and student awards and recognition ceremony on April 26, 2024. 

“Our faculty, staff, and students are collaborative and motivated people who take on what are often very challenging tasks,” said  Phillip J. VanFossen , interim dean of the College. “The success of the College is a reflection of the effort that you each give every day. Please know that your good work does not go unnoticed and is deeply appreciated.”

Awardees are pictured with Dean VanFossen and  Wayne E. Wright , associate dean for research, graduate programs, and faculty development.

Outstanding Service Award

Granted to those who provide “exceptional service to the College and its stakeholders.”

Carol Cox , Administrative Assistant to the Department Head of Educational Studies

Gina Haines , Assistant to the Department Head of Curriculum & Instruction

Karen George-Friedman , Grant Support Specialist

Jennifer Smith , Clinical Associate Professor of Special Education and Program Coordinator for the SPED undergraduate program

Laura Warner , Administrative Assistant, Evaluation and Learning Research Center

Bravo Awards

Purdue University’s Bravo Award is an innovative employee recognition initiative designed to honor outstanding faculty and staff members whose dedication drives the university toward new heights of success.

Kristy Bennett , Senior Administrative Assistant, Dept. of Curriculum & Instruction

Ann Bessenbacher , Senior Research Associate, Lead Data Scientist, Evaluation and Learning Research Center

Cynthia Bonwell , Managing Director of the Teaching Resource Center; Office Coordinator of Academic Services and Teacher Education

Nathalie Guerra-Long , Education Data Systems and Reporting Analyst, Office of Strategic Assessment and Accreditation

Breanya Hogue , Assistant Professor of Literacy & Language, Dept. of Curriculum & Instruction

Ashley Luzadder , Administrative Assistant and Receptionist, Office of the Dean

Pablo Moore , Associate Web Designer/Digital Media Specialist, Office of Communication

Jeannie Navarre , Administrative Assistant to the Department Head in the Dept. of Educational Studies

Rita Neidlinger , Assistant to the Dean, Office of the Dean

Brittne Paramore , Director, Office of Student Success and Global Engagement

Heather Prough , Administrative Assistant for the James F. Ackerman Center for Democratic Citizenship, Career and Technical Education, Social Studies, and Elementary Education programs

Erin Schultz , Academic Advisor for Academic Services and Teacher Education, Office of Academic Services

Jessie Zeng , Education Data Systems & Reporting Analyst, Office of Strategic Assessment and Accreditation

The Earl B. Notestine Award for Excellence in Academic Services

Recognizes, encourages, and promotes meritorious contributions in the delivery of student services .

Gabbi Waldon , Student Teaching Coordinator, Office of Clinical Practice, Office of Academic Services

Graduate Student Awards

2024-2025 holmes scholars.

Supports students who self-identify as racially and ethnically diverse and are pursuing graduate degrees in education at American Association of Colleges for Teacher Education (AACTE) member institutions

Abigail Erskine , Mathematics Education 

Ty’Bresha Glass , Gifted, Creative, and Talented Studies

Dallann Johnson , Counseling Psychology

Tirtha Karki , Literacy & Language Education

Mahreen Mamoon , Curriculum Studies

Samuel King , Counseling Psychology

Jessica Harris , Educational Leadership & Policy Studies

Graduating Holmes Scholars

Godwin Gyimah , Curriculum & Instruction

Shivani Ramoutar , Learning Design & Technology

Dr. Shawn Wooden , Educational Leadership & Policy Studies

Jingyuan Zhang , Special Education

Sergio Maldonado , Counseling Psychology

Outstanding Graduate Student Teaching Award

Recognizes doctoral students who demonstrated outstanding teaching as a teaching assistant or instructor of record.

Jenna Gist , Science Education, Dept. of Curriculum & Instruction

Bilsland Dissertation Fellowship

One semester to one year full fellowship awarded by the Dean of the Graduate School to outstanding PhD candidates to support the completion of their dissertation.

Tugce Karatas , PhD Candidate in Gifted, Creative, and Talented Studies

Muzi (Nina) Li , PhD Candidate in Counseling Psychology

Lucia Urena-Rodriguez , PhD Candidate in Learning Design & Technology

Qian Xu , PhD Candidate in Learning Design & Technology

Dean’s Dissertation Scholarship

Alexandria (Ali) Holmes , PhD Candidate in Educational Psychology and Research Methodology

Yangyang Zhu , PhD Candidate in Literacy & Language Education

Graduate Diversity, Equity, and Social Justice Award

Recognizes outstanding teaching, research, and/or engagement activities that promote diversity, equity, and social justice.

Jingyuan Zhang, Special Education, Dept. of Educational Studies

Mary Kay Sommers Dissertation Award

Recognizes an outstanding dissertation completed by a recent graduate. Endowed in perpetuity by alumna Mary Kay Sommers who received the College’s Outstanding Dissertation Award in 1990.

Dr. Ela Castellanos Reyes (PhD ’23), Assistant Professor of Digital Transformation of Education in Learning Design & Technology, North Carolina State University

Marcia Gentry Dissertation Award

Recognizes an outstanding doctoral dissertation completed by a recent graduate which addresses the constructs of equity and excellence in gifted and talented education.

Dr. Yang Yao (PhD ’23), Assessment Specialist for Academic Support, Yale University

Outstanding Graduate Student Research Award

Recognizes a graduate student with an outstanding record of scholarly research.

Dr. Daniela Vilarinho Rezende Pereira , Learning Design & Technology, Dept. of Curriculum & Instruction

Undergraduate Awards

Outstanding undergraduate sophomore award.

Recognizes a college sophomore with an outstanding record of academic achievement, leadership, and engagement.

Bronwyn Rigsby , Elementary Education

Outstanding Undergraduate Senior Award

Recognizes a college senior with an outstanding recording of academic achievement, leadership, and engagement.

Elizabeth Walker , Social Studies Education

Faculty Awards

Outstanding faculty teaching award.

Recognizes a faculty member with an outstanding record of teaching undergraduate and/or graduate courses in the college.

Dr. Amber Neal-Stanley , Assistant Professor of Curriculum Studies, Dept. of Curriculum & Instruction

Outstanding Faculty Engagement Award

Recognizes a faculty member with an outstanding record of engagement in their department, college, university, community, and/or their professional field.

Dr. Jasmine Begeske , Clinical Assistant Professor of Special Education, Dept. of Educational Studies

Outstanding Graduate Faculty Mentor Award

Recognizes a faculty member with an outstanding record of mentoring graduate students.

Dr. Brenda Capobianco , Professor of Science Education, Dept. of Curriculum & Instruction

Diversity, Equity, and Social Justice Award for Faculty and Staff

Recognizes faculty and staff who have an outstanding record of advancing diversity, equity, and social justice issues at the unit, college, or university level and beyond. This year is the inaugural year for a faculty member to receive this award.

Dr. Trish Morita-Mullaney , Associate Professor of Literacy & Language, Dept. of Curriculum & Instruction

Excellence in Discovery Award

Recognizes outstanding research achievements of professional staff and non-tenure-track faculty in the College.

Dr. Stephanie Oudghiri , Clinical Assistant Professor of Curriculum Studies, Dept. of Curriculum & Instruction

Outstanding Leadership in Global Engagement Award

Recognizes faculty and staff who have an outstanding record of global engagement activities.

Willie Burgess , Director, Evaluation and Learning Research Center

Dean’s Award for Outstanding Faculty Scholarship for Tenured Faculty

Recognizes a tenured faculty member with an outstanding record of research, publications, and other scholarly engagement.

Dr. Muhsin Menekse , Associate Professor of Engineering Education and Science Education, Dept. of Curriculum & Instruction

Dean’s Award for Outstanding Faculty Scholarship for Tenure-Track Faculty

Recognizes a tenure-track faculty member with an outstanding record of research, publications, and other scholarly engagement.

Dr. Xiang Zhou , Assistant Professor of Counseling Psychology, Dept. of Educational Studies

The College of Education congratulates these winners, along with the other winners of department and university awards this year.

Source:  Phillip J. VanFossen, Interim Dean, College of Education 

Purdue Prof. Dimitrios Peroulis wins prestigious Rudolph Henning Distinguished Mentoring Award from IEEE - Elmore Family School of Electrical and Computer Engineering - Purdue University

Purdue Prof. Dimitrios Peroulis wins prestigious Rudolph Henning Distinguished Mentoring Award from IEEE

Dimitrios Peroulis, Senior Vice President for Purdue University Online and Reilly Professor at Purdue University's Elmore Family School of Electrical and Computer Engineering, is being honored with the 2024 Rudolph Henning Distinguished Mentoring Award. This esteemed recognition celebrates Peroulis's exceptional commitment to guiding students and mentoring young engineers in the fields of RF/Microwave and Wireless Engineering.

The Rudolph Henning Distinguished Mentoring Award is presented to recognize an individual who has performed exemplary service encouraging students and/or mentoring young engineers to advance careers in the areas of RF/Microwave and/or Wireless Engineering. The selected person will be a current or past member of IEEE who has had a strong impact on influencing students, young engineers, or young faculty members to further their professional careers in the areas of RF/Microwave and/or Wireless Engineering. Factors considered are leadership, innovation, dedication, distinguished service, and breadth of participation. The award was presented at the 2024 IEEE Wireless and Microwave Technology Conference (WAMICON), held April 15-16 in Clearwater Beach, Florida.

From 2019-2023, Peroulis served as the Michael and Katherine Birck Head of ECE and special adviser to the Dean of Engineering on online learning. He is an IEEE and IET Fellow and has co-authored over 450 journal and conference papers. Throughout his career, Peroulis has mentored more than 40 graduate students who have won over 23 research and design competition awards as well as 13 student paper awards. Peroulis has received 11 teaching awards including the 2010 HKN C. Holmes MacDonald Outstanding Teaching Award and the 2010 Charles B. Murphy award, which is Purdue University's highest undergraduate teaching honor.

Purdue University professor Robert Browning testifies at Donald J. Trump hush-money trial

WEST LAFAYETTE, Ind. — Executive director of archives at C-SPAN and Purdue University professor Robert X. Browning testified at Donald J. Trump hush-money trial early Tuesday afternoon.

Browning's time on the stand was relatively short, speaking for only about 20 minutes, according to the  New York Times coverage  of the Donald J. Trump trial.

Browning played an important role in the prosecutors’ argument by being asked to authenticate certain clips featuring Trump which were admitted into evidence a few weeks ago by Judge Juan Merchan, according to the Times report.

"While the event is taking place, there’s a producer who is watching the video from beginning to the end to make sure there’s no interruptions in the transmission," he testified according to  CNN live trial coverage .

According to the  New York State Unified Court System's media website  and coverage from CNN, Browning was asked to authenticate the following videos:

• Two clips from  Donald Trump’s presidential candidacy that ran in Greensboro, North Carolina, back in Oct. 14, 2016 .
• A clip from  Donald Trump’s presidential candidate remarks in Gettysburg, Pennsylvania, dating back to Oct. 22, 2016 .
• A clip from  a news conference with president-elect Trump dating back to Jan. 11, 2017 .

The clips showcase Trump responding to stories alleging Trump sexually assaulted women and Trump referring to Michael Cohen, who formerly served as Trump’s attorney, as “a very talented lawyer.”

During the hearing, Browning said he felt “a little nervous” as it was the first time that he had testified in a trial, according to the CNN Live coverage.

Browning began as an associate professor of political science and communication at Purdue University in 1981 and later became the founding director of C-SPAN Archives at Purdue after discussing the idea with C-SPAN founder and Purdue graduate Brian Lamb.

The Journal & Courier emailed and telephoned Browning for comment. He has not responded.