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The Thesis/Dissertation Office ensures candidate compliance with formatting and deposit requirements as stated in the current thesis manual. The office processes paper and electronic theses/dissertations for placement in Purdue Undergraduate Library Storage or submission to ProQuest Information & Learning for microfilming and digitization. The office also provides instructional outreach to candidates, departments, staff, and faculty via scheduled thesis formatting and deposit workshops.

Thesis Help [email protected]

Carla Coffey Graduate Records Coordinator of Theses & Dissertations [email protected] (765) 496-0864

Lisa Williams Credentials Analyst [email protected] (765) 494-2607

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Home > ETD > OPEN_ACCESS_THESES > 1532

Open Access Theses

Power management modeling of electric machine converter systems.

Drummond R. Fudge , Purdue University

Date of Award

Degree type, degree name.

Master of Science in Electrical and Computer Engineering (MSECE)

Electrical and Computer Engineering

Committee Chair

Steven Pekarek

Committee Member 1

Oleg Wasynczuk

Committee Member 2

Greg Shaver

The control of power and energy sources to optimize a performance metric (i.e. maximize efficiency, minimize energy storage) has received considerable attention with the emergence of microgrids. In this research, power management models have been developed for two classes of electric machine/converter systems. Specifically, in the first class, a wound rotor synchronous machine/diode rectifier connected to a fixed DC output is considered. Relationships between commanded DC power, mechanical input power, and field winding current are established. In the second class, a buried magnet synchronous machine connected to an inverter is considered. The relationship between the mechanical power, AC power, and stator winding current amplitude and phase are derived. Both models are validated by comparing their respective behavior to those of detailed models that include switching of the semiconductor devices.

Recommended Citation

Fudge, Drummond R., "Power Management Modeling of Electric Machine Converter Systems" (2018). Open Access Theses . 1532. https://docs.lib.purdue.edu/open_access_theses/1532

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This page includes information and linked resources (in a gold font color) for completing your research and development for your thesis or directed project. Some of the links on this web page are to web pages not maintained by Computer and Information Technology.

• Jump to important deadlines for this semester's M.S. degree candidates
• Jump to resources for completing your research and development
• Jump to resources for writing your thesis or directed project report'
• Jump to depositing your thesis or directed project report

Important Deadlines for M.S. Degree Candidates

There are several deadlines and important dates during your final semester. Do not miss the deadlines. Otherwise, you might not graduate this semester, and you might have to pay some late fees. This page describes approximate dates.  To see the official dates for any given semester, check the Graduate School's Calendar .

Friday of the week before classes begin -- Last day to file a fully approved Plan of Study without paying a $200 late penalty. For more information about the Plan of Study, see the Plan of Study menu bar or icon at the top of this page.  Approved means "electronically signed by all committee members, the CIT program coordinator, and the CIT Graduate Program Chair.  Procrastination is not accepted as an excuse for not allowing enough time to secure signatures.

End of the first week of classes -- Declare candidacy of your degree by enrolling in CAND 99100. Up until the end of the first week of classes, you can do this through the CIT office. After this date (but before the university deadline), you must register for degree candidacy through the Graduate School office in Young (YONG) Hall.

NOTE: Students who are registered for exam (=defense) only, have a much earlier deadline -- sometime around mid-term. See above deadlines.

Within 30 days of the start of classes  -- Submit any last minute  revisions needed to your approved Plan of Study. If there are any courses on your approved Plan of Study that you later elected not to take, you must revise your Plan of Study to delete those courses, and add courses you did take (or are taking) -- with the approval of your committee chair and the Graduate Program Chair.  Otherwise, you will not pass your degree audit.

Approximately 4 weeks after classes begin  -- Last day to declare yourself as a degree candidate by registering for CAND 99100 for graduation at the end of this semester. If you did not do so before the end of the first week of classes, you will have to declare this candidacy through the Graduate School in Young (YONG) Hall.

NOTE: Students who registered for "Exam Only" or "Degree Only" must declare candidacy directly through the Graduate School's main office in Young Hall. 

Approximately 6 weeks after classes begin  -- For thesis students registered for "Exam Only" or "Degree Only" (neither is common), last practical day to defend thesis and secure electronic signatures on electronic Form 9 (thesis defense/exam). 

Approximately 8 weeks after classes begin  -- For thesis students registered for "Exam Only" or "Degree Only" (neither is common), last day to deposit thesis, and to submit their ETAF and Required Survey(s).  The ETAF should be initiated no earlier than the day of a students defense through the plan of study portal.

Approximately 8 weeks after classes begin -- Last day to submit your electronic Form 8 to propose a date and time for your thesis or directed project oral defense. Do this through the myPurdue web portal. The Graduate School requires a minimum of two weeks notice between the date of receipt of the Form 8 (inclusive of your committee members' e-signatures to be available on the specified date), and the proposed date of your defense. If you have trouble creating your Form 8, see the CIT office.

NOTE: When you propose your defense date make sure you also schedule a separate meeting for your thesis format review with your Advisor.

At least one or two working days prior to your thesis or report format formatting -- Send your electronic thesis or directed project report to your department's Thesis Format Advisor. That electronic copy will be processed by a plagiarism detection service. Also bring a paper copy of your thesis or report to the meeting (printed on one side of the page only).  Do not miss your scheduled thesis or directed project format meeting. If you do, you may not be allowed to deposit your report this semester and graduate .

At least one weekday before your oral defense -- Initiate your electronic Form 9 (via the myPurdue web portal). This form will be used later by your committee to pass or reject your written thesis or directed project report.

Day of your oral defense -- Do not miss your oral defense (also called the final exam ), or you will not graduate this semester. It must occur on the approved date, and  all faculty committee members must be in attendance, either in person or by way of teleconference.  You must also initiate your ETAF and complete the required survey's on the day of your defense through the plan of study portal.

At least two weeks before the end of classes (the earlier the better  -- For thesis students  other than "Exam Only" or "Degree Only" (neither of which is common), last  practical  day to defend thesis and secure electronic signatures on electronic Form 9 (thesis defense/exam). 

• IMPORTANT NOTE: Even NON-thesis students must schedule the above final exam, even though there may not be an oral defense . This is due to a bug in the Graduate School's processing. Non-thesis students can schedule their final exam thorough the CIT office.

Approximately the last day of classes (meaning prior to final exams week)  -- For thesis students , last day to deposit thesis, and to submit their ETAF and Required Survey(s).  The ETAF should be initiated no earlier than the day of a students defense through the plan of study portal.

          Again, for the official deadlines and dates for any of the above, in any given semester, click on this link -->   Graduate School's Calendar .

Resources for Completing Your Research and Development

• ​Institutional Review Board (IRB)  -- also called Human Research Protection Program -- provides approvals required in many CIT theses. If you are collected data via a survey instrument, you must get PRE-approval from Purdue IRB. Federal law requires such approval. You need to account for time to get IRB approval into your research project schedule.
• The Purdue Libraries PRIMO Search Engine  is a relatively new all-in-one search engine provided by the university libraries. It can be useful for your literature research and review.
• Google Scholar  is a special Google search engine designed to find scholarly publications that have been appropriately reviewed or refereed by academic faculty. This can also be useful to your literature research and review. Google Scholar search results point to publications that may be more academically credible than information discovered via Google's standard search engine. Also note that  Google Scholar  search results include a "Cite" link to properly formatted publication citations, including APA.
• Citation Machine (formerly called Son of Citation ) is a simple web app for creating properly formatted APA citations for your REFERENCES. Be aware that the titles of papers, books and other publications will be properly converted to mostly lowercase, but you will need to properly capitalize any entire acronyms and first letters of proper nouns. ​
• Qualtrics  is a web-based survey software service available for use by all Purdue faculty, students and staff to support teaching and research at Purdue. Surveys can be created and distributed by anyone with a career account. Be aware that most surveys require pre-approval from the IRB because they implement research protocols that involve humans.
• The Statistical Consulting Service (SCS)  in the Department of Statistics provides statistical software and design consulting services for the University community – free of charge. The SCS can help you with statistical software problems and data analysis issues. SCS provides assistance with the set up and running of a wide variety of statistical analysis software programs, including SAS ,  SPSS ,  Minitab  and S-Plus . Experimental design and data analysis consulting is available during the Fall, Spring and Summer semesters.  Services include assistance with all phases of research projects: proposal preparation, design of studies, survey design, data input strategies, data import/export, analysis of data, interpretation of results, presentation of results, and other statistics or probability problems.

Resources for Writing Your Thesis or Directed Project Report

• TECH 646 (a course taken by most CIT graduate students) assists the student in developing their proposal and therefore covers how to format the thesis or directed project report. Purdue has very specific standards for the written thesis (which also apply to the CIT directed project report). These standards must be followed precisely.  Additionally, CIT has a few specific standards for our discipline.
• The  Purdue Online Writing Lab (OWL)  is a link to Purdue's acclaimed Online Writing Lab (OWL) which can be very helpful to students with less than satisfactory writing skills. The web site also provides links into APA formatting expectations.

Thesis and Directed Project Report Templates

When writing your thesis or report, you must follow very specific Purdue and CIT standards. Theses and directed projects follow the same structure and formatting rules. Most students use either Microsoft  Word  or LaTeK to write their thesis or directed project report. To help you conform to Purdue and CIT standards, use the following Word or  LaTeX template.

• Students who prefer Microsoft  Word  should use the latest CIT Thesis Template (Word). This template conforms to the new Graduate School format standards that were announced in Fall 2016. A link is also provided in the sidebar (or menu) to this page.
• Students who prefer  LaTeK  should use the CIT Thesis Template (LaTeX). This template also conforms to the new Graduate School format standards that were announced in Fall 2016. A link is also provided in the sidebar (or menu) to this page.

Required Formatting Review for Theses and Directed Project Reports

All CIT students are required to meet with the  CIT Thesis and Directed Project Format Advisor  at least two days before they defend their thesis or direct project. This formatting appointment is mandatory. If you do not meet with the CIT Thesis and Directed Project Format Advisor and get the appropriate approval signature on the electronic Form 9, you will not graduate on time. The Thesis Formatting Review requires the following steps:

Schedule the formatting meeting to occur before the thesis defense.

• At least two working days before your meeting, submit an electronic copy of your thesis or directed project final report via email to the  CIT Thesis and Direct Project Format Advisor . This copy will be submitted to iThenticate software service for the required plagiarism review.
• Attend your formatting meeting. Failure to attend the meeting may delay your graduation. Bring one printed copy of your thesis (unbound and printed on one side of the page only) to the meeting.
• After the meeting, make any required formatting changes. Otherwise, you will not be allowed to deposit your thesis and graduate.

For your convenience, see the  CIT Thesis and Directed Project Report Checklist , in printable PDF format. This checklist contains all of the Purdue and CIT formatting rules against which your document will be evaluated.

Depositing Your Written Thesis or Directed Project Report

Written thesis.

After you have successfully defended your thesis, and made any required changes to your written thesis, and received all required approvals, you must still officially deposit your thesis. You should familiarize yourself with the Purdue Thesis Deposit Process .

Directed Project Report

There is no university-wide deposit for directed projects. Therefore, deposit appointments are not required for directed project students. Final directed project reports are deposited directly in the CIT Main Office to Kari Ludwig.

Directed project proposals and final reports do require CIT-specific cover forms (CIT DP-1 or CIT DP-3) that are listed in the sidebar menu.

Fall 2018 CIT Thesis and Directed Project Word Template   (last updated June 26, 2017)

Fall 2018  CIT Thesis and Directed Project Format Checklist

Current University Thesis Manual

Fall 2018 CIT LaTeX Thesis Template in Overleaf Editor Format (last updated April 4, 2017) (Contact: Prof. Justin Yang )

Overleaf LaTeX Editor   (highly recommended)

===============

APA Style Refresher / Tips

Google Scholar search engine

Purdue Libraries PRIMO search engine

Citation Machine for APA citation formatting

On-Line Writing Lab Services

Directed Project Forms (below)

Form CIT DP-1 Directed Project Proposal Approval

Form CIT DP-2 Directed Project Final Defense

Form CIT DP-3 Directed Project Final Report

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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

Purdue University

RCAC student employee successfully defends Master’s Thesis

• May 14, 2024 10:00am EDT
• Science Highlights

Yiqing Qu, a Graduate Research Assistant at the Rosen Center for Advanced Computing (RCAC), recently obtained her Master of Science (MS) degree in Computer Information and Technology. Her MS thesis was related to the work she conducted at RCAC, which ensured that there is a way to measure and improve adherence to the FAIR principles of scientific data management.

The ‘FAIR Guiding Principles for scientific data management and stewardship’ were published in Scientific Data in 2016. FAIR is an acronym for:

• Findability —Ensuring digital assets are easy for both humans and computers to locate through unique identifiers and rich metadata.
• Accessibility —Guaranteeing digital assets can be retrieved by users with clear and accessible data and metadata, regardless of the user's location.
• Interoperability —Facilitating the integration, exchange, and analysis of data across various formats and platforms, ensuring they can interact seamlessly.
• Reusability —Maximizing the utility of digital assets by ensuring they are well-described and maintain their value over time, allowing them to be reused in different contexts or for different purposes.

Without the use of FAIR principles, it is incredibly difficult for scientists to find and utilize the most relevant data for their research. Rajesh Kalyanam, a Senior Research Scientist for RCAC and Qu’s mentor for her project, speaks to the importance of including FAIR principles within data portals:

“So, essentially, there are what's called FAIR principles, which is an abbreviation of findable, accessible, interoperable, and reusable. These are principles for scientific data management. So when you're putting data up online—in order for it to actually be usable by other researchers—you want to make sure that you adhere to these principles. Any data portal or any website that's hosting research data needs to try and match or adhere to the FAIR principles, otherwise, that data could end up having limited impact outside of the original project for which it was created.”

The problem with FAIRness comes from its implementation. Research Software Engineers had no clear guidelines for adhering to the FAIR principles when creating a new data repository from scratch. So, in theory, incorporating FAIRness into data portals and data sets is a wonderful idea that everyone should start doing immediately. In practice, it is more akin to conquering the Chimera—or at least it was.

After discussing the idea with Kalyanam and her academic advisor, Dr. Baijian Yang, the Associate Dean for Research and a Professor at the Purdue Polytechnic Institute , Qu decided to tackle the problem of FAIRness for her Master’s thesis using the GeoEDF project as the functional basis of her research. The ultimate goal of her project was to create a methodology for evaluating FAIRness and to develop a structured approach to implementing improvements that would lead to the creation of FAIR-compliant data portals. If successful, researchers could then use her work to build their own data repositories that adhere to the FAIR principles.

“For working on my Master’s thesis,” says Qu, “I wanted to solve two questions: How to evaluate the FAIRness of the project, and how to improve the FAIRness of the project? I decided to spend two years working on these research questions, and chose this particular project due to its real-world applications and its close alignment with my personal research experience.”

Starting with a bare-bones Django portal framework built by the Globus team, Qu needed to:

• Evaluate the FAIRness of the data portal.
• Implement new features on the portal to improve the FAIRness score.
• Re-evaluate the FAIRness score of the improved data portal and iterate.

Once she decided to use the Globus portal framework as a starting point, Qu began by deploying the portal on the Anvil Composable Subsystem , a Kubernetes-based private cloud managed with Rancher that provides a platform for creating composable infrastructure on demand. Anvil is an NSF-funded shared computing resource and Purdue’s most powerful supercomputer. By using Anvil, Qu ensured that her work would be immediately available to researchers nationwide. Qu then moved on to the first FAIRness evaluation. She tested three separate evaluation tools and determined that a tool known as F-UJI was best for the project. Qu used F-UJI to score the FAIRness of the barebones Globus framework, which received a score of 47%. For comparison, Qu chose a well-known, mature, FAIR-compliant platform, that had diverse data types and well-designed metadata, to test against. The platform, known as HydroShare , scored a 64% in the FAIRness evaluation. Now that Qu had a target score to aim for, she began to implement new features to design her new data repository, named the GeoEDF Data Portal.

Aside from simply giving a FAIRness score, F-UJI also provided feedback on what improvements could be made. Qu looked at the feedback and prioritized the features that would lead to the greatest overall impact on the score. She then systematically added new features to the portal, increasing its FAIRness score from 47% to 60—a huge improvement that puts the portal on par with HydroShare in the FAIRness assessment. Needless to say, Qu and her mentors were thrilled with this result. Qu is now working on a paper based on her work and hopes to present this to other portal developers and researchers who are involved in building similar data portals.

“This project contained a lot of components,” says Qu. “When Rajesh was first presenting it to me, I could not imagine being able to complete it in two years. But we worked step-by-step to implement each of the components, and it ended up being a great success.”

“We are beyond excited by what Yiqing was able to do while working with us,” says Kalyanam. “You would be hard-pressed to find anyone who could complete so much in such little time, yet she did it while going to graduate school. She is one of the hardest working students I’ve ever had the pleasure of working with, and it was a joy to have her as part of the team.”

In her two years working at RCAC, Yiqing accomplished an astonishing amount, learned a lot, and had a good experience with the organization.

“I really enjoy working at the RCAC,” says Qu. “Not only working on this specific project, but all of the activities I had there. There were many opportunities to share our work with others and have our projects seen. I participated in poster sessions and Lightning Talks, and was able to discuss my project with others and gain useful insights from their work as well. Also, I learned a lot. The mentorship at RCAC is very good. Rajesh worked with me over the two years and was very supportive. He knows a lot about doing the research as well as the actual software engineering. He was also very good at providing guidance and advice for all aspects of the project.”

Now that Qu has successfully defended her thesis and graduated, she will be transitioning to her new job at Klaviyo , a company that provides intelligent marketing automation powered by customer data. In her new role, Qu will be working on Klaviyo's real-time data pipeline, facilitating the ingestion, processing, and movement of data points that power Klaviyo's core functionalities. While RCAC is sad to see Qu go, they are very excited for her and know that she has a promising career ahead.

To learn more about HPC and how it can help you, please visit our “ Why HPC? ” page.

Anvil is Purdue University’s most powerful supercomputer, providing researchers from diverse backgrounds with advanced computing capabilities. Built through a $10 million system acquisition grant from the National Science Foundation (NSF) , Anvil supports scientific discovery by providing resources through the NSF’s Advanced Cyberinfrastructure Coordination Ecosystem: Services & Support (ACCESS) , a program that serves tens of thousands of researchers across the United States.

Researchers may request access to Anvil via the ACCESS allocations process . More information about Anvil is available on Purdue’s Anvil website . Anyone with questions should contact [email protected] . Anvil is funded under NSF award No. 2005632. GeoEDF is funded under NSF award No. 1835822.

P.S.—Yiqing: On behalf of the entire RCAC department, congratulations and best of luck!

Written by: Jonathan Poole, [email protected]

Originally posted: May 13, 2024 4:17pm EDT

I am an Associate Professor in Dept. of Computer Science at Purdue University . Previously, I was an Assistant Professor in the Dept. of Computer Science and Engineering at the Ohio State University after I received my Ph.D. in Computer Science at University of California, Los Angeles . Prior to UCLA, I worked as an Associate/Assistant Researcher at Wireless Networking Group at Microsoft Research Asia . I received a M.Eng and B.Eng in Automation from Tsinghua University, both with highest honors. In the past, I held internships at IBM TJ Watson Research Center, Microsoft Research Redmond and Microsoft Research Asia.

My current research interests are in the broad areas of mobile networking, system and security , with a recent focus on renovating 5G access technologies, AI for networks, 5G/IoT security, mobile edge computing (mainly for autonomous drones, vehicles and robots).

Curriculum Vitae

To students at Purdue: There are openings to Research and/or Development in my lab, through independent studies (undergrad, MS and PhD) and thesis options (MS and PhD). There are several ongoing projects in AI and security which are calling for your participation. I would like you to have a quick look at my active research and recent publications first. If you want to know more, please email me (drop by is not recommended).

What is NEW?

05/2024 Welcome to our group, Go2Edu!

04/2024 Datasets collected for all our 5G measurement studies have been released through ONE HUB at Github . All raw data traces have been collected through experiments over MI-LAB .

04/2024 Shaan passed his MS defense! Congrats!

04/2024 5G-in-the-sky measurement paper accepted at IWQoS’24! Congrats to Yanbing and Jingqi!

02/2024 Drone delivery to door won best demo award at HotMobile’24! Congrats to Shengqing, Junpeng and Chen!

01/2024 IMS security accepted at MobiCom’24!

Current Teaching

CS422: Computer Networks , Spring 2024 ( Brightspace Campuswire Gradescope )

More courses in the past

My recent research aims to innovate 5G mobile networks and beyond to support emerging demands on increasing performance , reliability and security .

Active projects:

AI for Networks: New Mobility and AI for 5G Security (part of NSF AI Institute for Future Edge Networks and Distributed Intelligence (AI-EDGE) , CNS-2112471 )

AIM: Amplify Intelligence in Mobile Networked Systems ( CNS-1750953 )

Cellular-911 Security ( CNS-2246051 )

MI-LAB : Harnessing network data to spur operational mobile network research (a follow-up of our prior project MobileInsight )

Robots4U: Personal Robots For YOU

More on past and ongoing projects: here .

Tutorial on AIM, MobileInsight and beyond

This is a brief summary of high-level position talk to the public. It has basic idea, approaches and main results, by skipping all technical details of each research problem under this umbrella project: ( pps ), ( PDF ).

This is a tutorial of L2/L1 latency analysis enabled by MobileInsight. It was originally used for Hackathon, co-located at ACM SIGCOMM on Aug 25, 2018, and then was reorganized and substantially enhanced for public distribution (step-by-step learning and practice). The used codes and sample logs can be found here . You can find the codes developed by the hackathon team (Quentin, Maryam, Syed and Ensar) at github .

This is an 3-hr tutorial on GlobeCom’17 on Dec 8, 2017. It introduces how to step-by-step verify mobile network operations on your phones via MobileInsight. Here is the tutorial slide ( pdf ) ( ppsx ). For more up-to-date information, please check our MobileInsight website.

Selected Recent Papers (a full list at here or Google Scholar )

MobiCom’23 : CA++: Enhancing Carrier Aggregation Beyond 5G

INFOCOM’23 : A Close Look at 5G in the Wild: Unrealized Potentials and Implications

MobiCom’22 : Uncovering Insecure Designs of Cellular Emergency Services (911), Best Community Paper Runner-up

MobiCom’21 : Insecurity of Operational Cellular IoT Service: New Vulnerabilities, Attacks, and Countermeasures

MobiCom’21 : Experience: A Five-Year Retrospective of MobileInsight

MobiCom’20 iCellSpeed: Increasing Cellular Data Speed with Device-Assisted Cell Selection ( 5-min pitch )( 20-min presentation )

MobiCom’20 Experience: Towards Automated Customer Issue Resolution in Cellular Networks

IMC’18 Mobility Support in Cellular Networks: A Measurement Study on Its Configurations and Implications

MobiCom’18 CEIVE: Combating Caller ID Spoofing on 4G Mobile Phones Via Callee-Only Inference and Verification

MobiCom’18 Resolving Policy Conflicts in Multi-Carrier Cellular Access

MobiCom’18 ChromaCode: A Fully Imperceptible Screen-Camera Communication System

SIGCOMM’18 A Measurement Study on Multi-path TCP with Multiple Cellular Carriers on High-speed Rails

Mobicom’17 A Control-Plane Perspective on Reducing Data Access Latency in LTE Networks

Mobicom’17 The Tick Programmable Low-Latency SDR System, Best Community Paper Award

MobiCom’16 MobileInsight: Extracting and Analyzing Cellular Network Information on Smartphone, Best Community Paper Award

SIGMETRICS’16 Instability in Distributed Mobility Management: Revisiting Configuration Management in 3G/4G Mobile Networks

NSDI’16 iCellular: Define Your Own Cellular Network Access on Commodity Smartphones

CCS’16 New Security Threats Caused by IMS-based SMS Service in 4G LTE Networks

CCS’15 Insecurity of Voice Solution VoLTE in LTE Mobile Networks

MobiSys’15 InFrame : Achieve Simultaneous Screen-Human Viewing and Hidden Screen-Camera Communication

CCS’14 Real Threats to Your Data Bills: Security Loopholes and Defense in Mobile Data Charging

NSDI’14 Epsilon: A Visible Light Based Positioning System

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SIGCOMM’14 Control-Plane Protocol Interactions in Cellular Networks

Purdue Online Writing Lab Purdue OWL® College of Liberal Arts

Welcome to the Purdue OWL

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Copyright ©1995-2018 by The Writing Lab & The OWL at Purdue and Purdue University. All rights reserved. This material may not be published, reproduced, broadcast, rewritten, or redistributed without permission. Use of this site constitutes acceptance of our terms and conditions of fair use.

Scholars often write abstracts for various applications: conference presentations may require an abstract or other short summary for a program; journal articles almost always require abstracts; invited talks and lectures are often advertised using an abstract. While the application may necessarily change the length of the abstract (a conference program may only allow for 50-75 words, for instance), the purpose and structure remains fairly constant.

Abstracts are generally kept brief (approximately 150-200 words). They differ by field, but in general, they need to summarize the article so that readers can decide if it is relevant to their work. The typical abstract includes these elements:

• A statement of the problem and objectives
• A statement of the significance of the work
• A summary of employed methods or your research approach
• A summary of findings or conclusions of the study
• A description of the implications of the findings

Regardless of field, abstract authors should explain the purpose of the work, methods used, the results and the conclusions that can be drawn. However, each field purports slightly different ways to structure the abstract. A reliable strategy is to write the abstract as a condensed version of your article, with 1-2 sentences summarizing each major section. This means that in many of the sciences and a large portion of the humanities, abstracts follow a version of the IMRAD structure: Introduction, Methods, Results, and Discussion.

Most scientific journals require authors to submit such abstracts. It is generally advisable to write the abstract in the English language. That is because most papers in other languages, especially Asian nations, tend to publish an English abstract with common search engines, such as, the MLA site.

Example Abstract

This example abstract follows the IMRAD structure closely. The first two sentences are the introduction and background information. Sentences 3-5 describe the methods used in the study. Sentence 6 summarizes the results, while the last two sentences summarize the discussion and conclusion of the study; they also indicate the significance of the results.

Usability and User-Centered Theory for 21 st Century OWLs — by Dana Lynn Driscoll, H. Allen Brizee, Michael Salvo, and Morgan Sousa from The Handbook of Research on Virtual Workplaces and the New Nature of Business Practices . Eds. Kirk St. Amant and Pavel Zemlansky. Hershey, PA: Idea Group Publishing, 2008.

This article describes results of usability research conducted on the Purdue Online Writing Lab (OWL). The Purdue OWL is an information-rich educational website that provides free writing resources to users worldwide. Researchers conducted two generations of usability tests. In the first test, participants were asked to navigate the OWL and answer questions. Results of the first test and user-centered scholarship indicated that a more user-centered focus would improve usability. The second test asked participants to answer writing-related questions using both the OWL website and a user-centered OWL prototype. Participants took significantly less time to find information using the prototype and reported a more positive response to the user-centered prototype than the original OWL. Researchers conclude that a user-centered website is more effective and can be a model for information-rich online resources. Researchers also conclude that usability research can be a productive source of ideas, underscoring the need for participatory invention.

File(s) under embargo

until file(s) become available

ANOMALY DETECTION USING MACHINE LEARNING FORINTRUSION DETECTION

This thesis examines machine learning approaches for anomaly detection in network security, particularly focusing on intrusion detection using TCP and UDP protocols. It uses logistic regression models to effectively distinguish between normal and abnormal network actions, demonstrating a strong ability to detect possible security concerns. The study uses the UNSW-NB15 dataset for model validation, allowing a thorough evaluation of the models' capacity to detect anomalies in real-world network scenarios. The UNSW-NB15 dataset is a comprehensive network attack dataset frequently used in research to evaluate intrusion detection systems and anomaly detection algorithms because of its realistic attack scenarios and various network activities.

Further investigation is carried out using a Multi-Task Neural Network built for binary and multi-class classification tasks. This method allows for the in-depth study of network data, making it easier to identify potential threats. The model is fine-tuned during successive training epochs, focusing on validation measures to ensure its generalizability. The thesis also applied early stopping mechanisms to enhance the ML model, which helps optimize the training process, reduces the risk of overfitting, and improves the model's performance on new, unseen data.

This thesis also uses blockchain technology to track model performance indicators, a novel strategy that improves data integrity and reliability. This blockchain-based logging system keeps an immutable record of the models' performance over time, which helps to build a transparent and verifiable anomaly detection framework.

In summation, this research enhances Machine Learning approaches for network anomaly detection. It proposes scalable and effective approaches for early detection and mitigation of network intrusions, ultimately improving the security posture of network systems.

Degree Type

• Master of Science
• Computer and Information Technology

Campus location

• West Lafayette

Advisor/Supervisor/Committee Chair

Additional committee member 2, additional committee member 3, usage metrics.

• Machine learning not elsewhere classified

Funding endowed chair in agricultural economics reflects couple’s global vision brought home: “Purdue is special in our lives”

• Story by Nancy Alexander
• Photos by Bosch Studios Photography
• May 13, 2024

B ob and Karen Thompson have operated as a team, both throughout their 55-year marriage and in their long-standing commitment to sending Purdue Agriculture students abroad and welcoming international students to their home.

Now the Thompsons are strengthening the international focus of Bob’s former department by endowing the Robert and Karen Thompson Chair in International Agricultural Economics. The couple hopes the position will ensure a leading scholar in an international aspect of the discipline such as trade, development or comparative agricultural policy “to help solidify the commitment to the international focus in the offerings of the department,” he says.

The Thompson Chair is open-ended by design. “As a former dean, I understand that the college has to have the flexibility to respond to greatest needs and opportunities that come along that you never see coming,” Bob says.

Thompson knows about unanticipated opportunities. He grew up in New York state, so close to the Canadian border that the news source in his home was the Canadian Broadcasting Company, which he credits with “more of an international perspective than the average American community would get.”

Despite his emerging interest in international affairs, his options for study abroad were limited. Some local high schools sent students overseas through American Field Service (AFS) programs. “I really wished my little rural high school — I was in a graduating class of 20 — would get an AFS program, but it never did,” he recalls.

Thompson’s focus on agricultural policy emerged as an undergraduate at Cornell University, where he became intrigued by international food issues such as hunger and poverty. He applied for the university’s two study abroad scholarships — and ended up as first runner-up for each of them. Based on his interest, however, officials told him that if he was accepted to another program, Cornell would support him with additional scholarship funds.

Thompson wasn’t selective about his destination. “My first choice was ‘wherever,’” he says.

“Wherever” turned out to be Denmark for his junior year, where he met Karen, then a student in elementary education who grew up on a small farm on the Danish island of Bornholm. The couple maintained a long-distance romance for two years after Bob returned to Cornell and then completed a master’s degree at Purdue.

Shortly after they married in August 1968, the Thompsons went to Laos with International Voluntary Service, a Peace Corps-type program that allowed the two citizens of different countries to serve together, working with local agriculture and home economics extension agents.

Karen immigrated to the U.S. when they returned from Laos in 1970. That summer, they came to Purdue for her to complete her elementary education degree and Bob to begin a PhD program in agricultural economics. After earning her teaching degree in 1971, Karen started a master’s degree in special education.

In summer 1972, the Thompsons went abroad again, this time to Brazil, where Purdue had an institutional strengthening program with the Federal University of Viçosa dating to the 1950s. Bob collected data for his thesis and taught agricultural production economics in Portuguese, while Karen taught the elementary school-age children of Purdue professors on the Viçosa project.

Now a family of three — their daughter, Kristina, was born in Brazil — the Thompsons returned to Purdue in January 1974. At the May commencement, Karen received her master’s degree, and Bob received his PhD and joined the agricultural economics faculty. Their second child, Eric, arrived a year later. As a faculty member, Bob developed a nationally recognized program in international trade and agricultural development.

In 1983, the family moved to Washington, D.C. for a one-year leave that extended to four. There Bob served as a senior staff economist for the President’s Council on Economic Advisers, and later, assistant secretary for economics for the U.S. Department of Agriculture.  

Thompson returned to Purdue as dean of the College of Agriculture in 1987 and was a strong advocate for study abroad.  At the beginning of his tenure, only one student in the College of Agriculture was studying overseas. When he left six-and-a-half years later, 10 percent of agriculture students graduated having had an international experience.

Thompson equates his one year in Denmark, two in Laos and two in Brazil, all within a nine-year time frame, to “a second PhD program.”

Having on-the-ground international experience made me much more effective as a professional doing research in other countries. Agriculture is such a global industry. To be a well-prepared professional in any agricultural occupation requires having a global vision or perspective.” - Bob Thompson

In 1993 Thompson left the dean’s position to return to his passion for developing agriculture and reducing hunger in low-income countries. He became president and chief executive officer of the Winrock International Institute for Agricultural Development; and later moved back to Washington, D.C. to become director of rural development for the World Bank.

In Washington, Karen became volunteer curator of the Smithsonian Institution’s lace collection in its American History Museum. Her mother had taught her the basics of bobbin lace, and over time she honed her skills through training courses in several European countries. In addition to research and writing on lace made in colonial Ipswich, Massachusetts, the only U.S. site of a commercial bobbin lace industry, Karen continues to teach online courses on the technique. 

Thompson’s commitment to study abroad laid the groundwork for the nearly 40 percent of Agriculture students who now graduate having studied abroad in hundreds of wide-ranging programs the college offers through International Programs in Agriculture  (IPIA).

The Thompsons were so passionate about providing international opportunities to undergraduates that they endowed the Robert L. and Karen H. Thompson Scholarship to support students who participate in international study programs in agriculture.

IPIA asks the scholarship recipients to send the couple a postcard from their overseas institution. “Those are so nice to receive,” Bob says. “The comment that you hear most often is that it’s ‘a life-changing experience.’ It certainly was for me.”

Ensuring that agriculture students experience different cultures firsthand is good for Indiana agriculture, Karen adds. “It’s great for the ones who go back on the farms, but for the ones who are hired by agribusiness, the firms want international experience.”

Bob credits Karen for managing family and hosting responsibilities while he taught, conducted research and served in administrative positions. In addition to raising bicultural and bilingual children, the Thompsons regularly welcomed international students and friends to their home. Karen recalls learning to prepare an American Thanksgiving dinner before she had ever had one herself.

“Our children grew up with the American part of the family, the Danish part of the family, but also the international students at Purdue, because they really became our third family, to us and our children,” she says. “And it’s so important for the international students to get to know an American home and family.”

Not surprisingly, the travel bug also bit the Thompsons’ children. Kristina studied in Denmark in high school and college before volunteering with the Peace Corps in Benin and later, in Rwanda with her husband, Tom. The couple currently is assigned to Cotonou, Benin, where she is the Peace Corps’ country program and training director, and Tom teaches in the international school.

Both Eric and his wife, Amy, are Purdue graduates. Eric spent his junior year in Purdue Engineering at a German university and completed graduate study at the Danish Technical University. He now works in human hearing research for the Air Force. Their son is a high school senior, and their two daughters both studied abroad as college students.

“You detect a pattern here?” Bob asks, smiling.

The international perspective that the Thompsons cultivated in their own home has over time changed the College of Agriculture, by broadening student horizons through study abroad, and now, in a new chair in agricultural economics that promises to impact teaching and research.

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