Clifford A. Shaffer

152 papers A* 2A 46B 10Misc 5Journal 65Unranked 22
YearRankTypeTitle / Venue / Authors
2025 J jnl
Hidden Cost of Mutation Testing on Auto-Grader.
Comput. Appl. Eng. Educ.
Rifat Sabbir Mansur, Clifford A. Shaffer, Stephen H. Edwards
2025 J jnl
Identifying critical self-regulated learning skills: a Delphi process study.
Comput. Sci. Educ.
Molly Domino, Bob Edmison, Stephen H. Edwards, Rifat Sabbir Mansur, Alexandra Thompson, Clifford A. Shaffer
2025 — conf
The Impact of Group Discussion and Formation on Student Performance: An Experience Report in a Large CS1 Course.
SIGCSE (1)
Tong Wu, Xiaohang Tang, Sam Wong, Xi Chen, Clifford A. Shaffer, Yan Chen
2024 — conf
Mutating Matters: Analyzing the Influence of Mutation Testing in Programming Courses.
SIGCSE Virtual (1)
Rifat Sabbir Mansur, Clifford A. Shaffer, Stephen H. Edwards
2024 — conf
Ninth SPLICE Workshop on Technology and Data Infrastructure for CS Education Research.
SIGCSE (2)
Clifford A. Shaffer, Peter Brusilovsky, Ken Koedinger, Thomas W. Price, Tiffany Barnes, Behrooz Mostafavi
2024 — conf
Teaching Formal Languages through Programmed Instruction.
SIGCSE (1)
Mostafa Mohammed, Clifford A. Shaffer
2024 J jnl
The Impact of Group Discussion and Formation on Student Performance: An Experience Report in a Large CS1 Course.
CoRR
Tong Wu, Xiaohang Tang, Sam Wong, Xi Chen, Clifford A. Shaffer, Yan Chen
2023 — conf
Analyzing Student Session Data in an eTextbook.
iTextbooks@AIED
Samnyeong Heo, Mohammed F. Farghally, Mostafa Mohammed, Clifford A. Shaffer
2021 — conf
Clickstream Data from a Formal Languages eTextbook (Abstract).
EDM (Workshops)
Mostafa Mohammed, Clifford A. Shaffer
2021 — conf
Containerizing an eTextbook Infrastructure (Abstract).
EDM (Workshops)
Alexander Hicks, Clifford A. Shaffer
2021 J jnl
Fast and accurate incremental feedback for students' software tests using selective mutation analysis.
J. Syst. Softw.
Ayaan M. Kazerouni, James C. Davis, Arinjoy Basak, Clifford A. Shaffer, Francisco Servant, Stephen H. Edwards
2021 — conf
Increasing Student Interaction with an eTextbook using Programmed Instruction (short paper).
iTextbooks@AIED
Mostafa Mohammed, Clifford A. Shaffer
2021 A conf
Support for Programmed Instruction in an eTextbook.
SIGCSE
Mostafa Mohammed, Piexuan Ge, Samnyeong Heo, Clifford A. Shaffer
2021 A conf
Teaching Formal Languages with Visualizations and Auto-Graded Exercises.
SIGCSE
Mostafa Mohammed, Clifford A. Shaffer, Susan H. Rodger
2021 A conf
The Impact of Programming Project Milestones on Procrastination, Project Outcomes, and Course Outcomes: A Quasi-Experimental Study in a Third-Year Data Structures Course.
SIGCSE
Clifford A. Shaffer, Ayaan M. Kazerouni
2021 A conf
The Online Transition of Two CS Courses in Response to COVID-19.
SIGCSE
Mohammed F. Farghally, Mostafa Mohammed, Hamdy F. F. Mahmoud, Margaret Ellis, Derek Haqq, Molly Domino, Brett D. Jones, Clifford A. Shaffer
2020 A conf
Auto-Grading Jupyter Notebooks.
SIGCSE
Hamza Manzoor, Amit Naik, Clifford A. Shaffer, Chris North, Stephen H. Edwards
2020 J jnl
BTRecurTutor: a tutorial for practicing recursion in binary trees.
Comput. Sci. Educ.
Sally Hamouda, Stephen H. Edwards, Hicham G. Elmongui, Jeremy V. Ernst, Clifford A. Shaffer
2020 J jnl
Design and Evaluation of a Block-based Environment with a Data Science Context.
IEEE Trans. Emerg. Top. Comput.
Austin Cory Bart, Javier Tibau, Dennis G. Kafura, Clifford A. Shaffer, Eli Tilevich
2020 J jnl
Dynamic Concept Maps for eTextbook Glossaries: Design and Evaluation.
Frontiers Comput. Sci.
Ehsan Elgendi, Clifford A. Shaffer
2020 — conf
Exploring the Bug Investigation Techniques of Intermediate Student Programmers.
Koli Calling
Rifat Sabbir Mansur, Ayaan M. Kazerouni, Stephen H. Edwards, Clifford A. Shaffer
2019 A conf
Approaches for Coordinating eTextbooks, Online Programming Practice, Automated Grading, and More into One Course.
SIGCSE
Margaret Ellis, Clifford A. Shaffer, Stephen H. Edwards
2019 A conf
Assessing Incremental Testing Practices and Their Impact on Project Outcomes.
SIGCSE
Ayaan M. Kazerouni, Clifford A. Shaffer, Stephen H. Edwards, Francisco Servant
2019 J jnl
Crossing the Borders: Re-Use of Smart Learning Objects in Advanced Content Access Systems.
Future Internet
Hamza Manzoor, Kamil Akhuseyinoglu, Jackson Wonderly, Peter Brusilovsky, Clifford A. Shaffer
2019 J jnl
Quasi-Newton Stochastic Optimization Algorithm for Parameter Estimation of a Stochastic Model of the Budding Yeast Cell Cycle.
IEEE ACM Trans. Comput. Biol. Bioinform.
Minghan Chen, Brandon D. Amos, Layne T. Watson, John J. Tyson, Young Cao, Clifford A. Shaffer, Michael W. Trosset, Cihan Oguz, Gisella Kakoti
2019 J jnl
RecurTutor: An Interactive Tutorial for Learning Recursion.
ACM Trans. Comput. Educ.
Sally Hamouda, Stephen H. Edwards, Hicham G. Elmongui, Jeremy V. Ernst, Clifford A. Shaffer
2019 A conf
Student Debugging Practices and Their Relationships with Project Outcomes.
SIGCSE
Ayaan M. Kazerouni, Riffat Sabbir Mansur, Stephen H. Edwards, Clifford A. Shaffer
2019 A conf
Using Interactive Visualization and Programmed Instruction to Teach Formal Languages.
SIGCSE
Mostafa Mohammed, Clifford A. Shaffer, Susan H. Rodger
2019 — conf
Using Programmed Instruction to Help Students Engage with eTextbook Content.
iTextbooks@AIED
Mostafa Mohammed, Susan H. Rodger, Clifford A. Shaffer
2019 A conf
What Have We Talked About?
SIGCSE
Austin Cory Bart, Clifford A. Shaffer
2018 A conf
An Interactive Tutorial for Learning to Manipulate References: (Abstract Only).
SIGCSE
Mostafa Mohammed, Sushma Mandava, Jieun Chon, Margaret Ellis, Clifford A. Shaffer
2018 A conf
CS Education Infrastructure for All: Interoperability for Tools and Data Analytics (Abstract Only).
SIGCSE
Clifford A. Shaffer, Peter Brusilovsky, Kenneth R. Koedinger, Stephen H. Edwards
2018 J jnl
Experience: Learner Analytics Data Quality for an eTextbook System.
ACM J. Data Inf. Qual.
Kyu Han Koh, Eric Fouh, Mohammed F. Farghally, Hossameldin Shahin, Clifford A. Shaffer
2018 J jnl
JigCell Model Connector: building large molecular network models from components.
Simul.
Thomas C. Jones Jr, Stefan Hoops, Layne T. Watson, Alida Palmisano, John J. Tyson, Clifford A. Shaffer
2018 A conf
Reconciling the Promise and Pragmatics of Enhancing Computing Pedagogy with Data Science.
SIGCSE
Austin Cory Bart, Dennis G. Kafura, Clifford A. Shaffer, Eli Tilevich
2017 J jnl
A basic recursion concept inventory.
Comput. Sci. Educ.
Sally Hamouda, Stephen H. Edwards, Hicham G. Elmongui, Jeremy V. Ernst, Clifford A. Shaffer
2017 J jnl
BlockPy: An Open Access Data-Science Environment for Introductory Programmers.
Computer
Austin Cory Bart, Javier Tibau, Eli Tilevich, Clifford A. Shaffer, Dennis G. Kafura
2017 A conf
Computing with CORGIS: Diverse, Real-world Datasets for Introductory Computing.
SIGCSE
Austin Cory Bart, Ryan Whitcomb, Dennis G. Kafura, Clifford A. Shaffer, Eli Tilevich
2017 J jnl
Computing with CORGIS: Diverse, Real-world Datasets for Introductory Computing.
Inroads
Austin Cory Bart, Ryan Whitcomb, Dennis G. Kafura, Clifford A. Shaffer, Eli Tilevich
2017 B conf
DevEventTracker: Tracking Development Events to Assess Incremental Development and Procrastination.
ITiCSE
Ayaan M. Kazerouni, Stephen H. Edwards, T. Simin Hall, Clifford A. Shaffer
2017 A conf
Evaluating the Effectiveness of Algorithm Analysis Visualizations.
SIGCSE
Mohammed F. Farghally, Kyu Han Koh, Hossameldin Shahin, Clifford A. Shaffer
2017 A conf
Quantifying Incremental Development Practices and Their Relationship to Procrastination.
ICER
Ayaan M. Kazerouni, Stephen H. Edwards, Clifford A. Shaffer
2017 A conf
Towards a Concept Inventory for Algorithm Analysis Topics.
SIGCSE
Mohammed F. Farghally, Kyu Han Koh, Jeremy V. Ernst, Clifford A. Shaffer
2016 J jnl
Creating Engaging Online Learning Material with the JSAV JavaScript Algorithm Visualization Library.
IEEE Trans. Learn. Technol.
Ville Karavirta, Clifford A. Shaffer
2016 J jnl
Crib sheets and exam performance in a data structures course.
Comput. Sci. Educ.
Sally Hamouda, Clifford A. Shaffer
2016 B conf
Implementing an Open-Access, Data Science Programming Environment for Learners.
COMPSAC
Austin Cory Bart, Javier Tibau, Eli Tilevich, Clifford A. Shaffer, Dennis G. Kafura
2016 A conf
Instructional Design is to Teaching as Software Engineering is to Programming.
SIGCSE
Austin Cory Bart, Clifford A. Shaffer
2016 B conf
Investigating Difficult Topics in a Data Structures Course Using Item Response Theory and Logged Data Analysis.
EDM
Eric Fouh, Mohammed F. Farghally, Sally Hamouda, Kyu Han Koh, Clifford A. Shaffer
2016 A conf
OpenDSA: An Interactive eTextbook for Computer Science Courses.
SIGCSE
Clifford A. Shaffer
2016 A conf
Using OpenDSA eTextbooks in Your Class (Abstract Only).
SIGCSE
Clifford A. Shaffer, Thomas L. Naps, Susan H. Rodger
2016 A conf
Visualizing Algorithm Analysis Topics (Abstract Only).
SIGCSE
Mohammed F. Farghally, Eric Fouh, Sally Hamouda, Kyu Han Koh, Clifford A. Shaffer
2015 J jnl
A Framework to Analyze the Performance of Load Balancing Schemes for Ensembles of Stochastic Simulations.
Int. J. Parallel Program.
Tae-Hyuk Ahn, Adrian Sandu, Layne T. Watson, Clifford A. Shaffer, Yang Cao, William T. Baumann
2015 A conf
Best Practices for IRB Approval: Four Perspectives.
SIGCSE
Michael S. Kirkpatrick, Janice E. Cuny, Mark Guzdial, Amanda M. Holland-Minkley, Clifford A. Shaffer
2015 A conf
Big Data in Computer Science Education Research.
SIGCSE
Orit Hazzan, Clifford A. Shaffer
2015 A conf
Creating Stimulating, Relevant, and Manageable Introductory Computer Science Projects that Utilize Real-Time, Large, Web-Based Datasets (Abstract Only).
SIGCSE
Eli Tilevich, Clifford A. Shaffer, Austin Cory Bart
2015 B conf
Examining Classroom Interventions to Reduce Procrastination.
ITiCSE
Stephen H. Edwards, Joshua Martin, Clifford A. Shaffer
2015 J jnl
JigCell Run Manager (JC-RM): a tool for managing large sets of biochemical model parametrizations.
BMC Syst. Biol.
Alida Palmisano, Stefan Hoops, Layne T. Watson, Thomas C. Jones Jr, John J. Tyson, Clifford A. Shaffer
2015 A conf
Open Educational Resources: What Next? (Abstract Only).
SIGCSE
Lillian (Boots) Cassel, Cynthia Bailey Lee, Clifford A. Shaffer, Darina Dicheva
2015 A conf
The Effects of Procrastination Interventions on Programming Project Success.
ICER
Joshua Martin, Stephen H. Edwards, Clifford A. Shaffer
2014 A conf
Analysis of interaction logs for online tutorials (abstract only).
SIGCSE
Daniel A. Breakiron, Eric Fouh, Sally Hamouda, Clifford A. Shaffer
2014 A conf
Creating stimulating, relevant, and manageable introductory computer science projects that utilize real-time web-based data (abstract only).
SIGCSE
Eli Tilevich, Clifford A. Shaffer, Austin Cory Bart
2014 J jnl
Design and architecture of an interactive eTextbook - The OpenDSA system.
Sci. Comput. Program.
Eric Fouh, Ville Karavirta, Daniel A. Breakiron, Sally Hamouda, T. Simin Hall, Thomas L. Naps, Clifford A. Shaffer
2014 J jnl
Exploring students learning behavior with an interactive etextbook in computer science courses.
Comput. Hum. Behav.
Eric Fouh, Daniel A. Breakiron, Sally Hamouda, Mohammed F. Farghally, Clifford A. Shaffer
2014 J jnl
Grand Challenges in Digital Education.
Frontiers ICT
Clifford A. Shaffer
2014 J jnl
Multistate Model Builder (MSMB): a flexible editor for compact biochemical models.
BMC Syst. Biol.
Alida Palmisano, Stefan Hoops, Layne T. Watson, Thomas C. Jones Jr, John J. Tyson, Clifford A. Shaffer
2014 J jnl
Open source software and the algorithm visualization community.
Sci. Comput. Program.
Matthew L. Cooper, Clifford A. Shaffer, Stephen H. Edwards, Sean P. Ponce
2014 — conf
Recommendation based on Deduced Social Networks in an educational digital library.
JCDL
Monika Akbar, Clifford A. Shaffer, Weiguo Fan, Edward A. Fox
2014 A conf
Transforming introductory computer science projects via real-time web data.
SIGCSE
Austin Cory Bart, Eli Tilevich, T. Simin Hall, Anthony Allevato, Clifford A. Shaffer
2013 A conf
Automated generation and grading of programming assignments (abstract only).
SIGCSE
Steven C. Shaffer, Clifford A. Shaffer
2013 B conf
JSAV: the JavaScript algorithm visualization library.
ITiCSE
Ville Karavirta, Clifford A. Shaffer
2013 A conf
OpenDSA: using an active eTextbook to teach data structures and algorithms (abstract only).
SIGCSE
Eric Fouh, Daniel A. Breakiron, Mai Elshehaly, T. Simin Hall, Ville Karavirta, Clifford A. Shaffer
2013 A conf
Panel: textbook pricing, present and future.
SIGCSE
Edward F. Gehringer, Beth Lang Golub, Randi Cohen, David M. Arnow, Clifford A. Shaffer
2013 — conf
Requirements and design strategies for open source interactive computer science eBooks.
ITiCSE-WGR
Ari Korhonen, Thomas L. Naps, Charles Boisvert, Pilu Crescenzi, Ville Karavirta, Linda Mannila, Bradley Miller, Briana B. Morrison, Susan H. Rodger, Rocky Ross, Clifford A. Shaffer
2013 J jnl
Using hierarchical data mining to characterize performance of wireless system configurations.
Adv. Eng. Softw.
Alex Verstak, Naren Ramakrishnan, Layne T. Watson, Jian He, Clifford A. Shaffer, Ananth Grama
2012 A conf
Active eTextbooks for CS: what should they be? (abstract only).
SIGCSE
Clifford A. Shaffer
2012 — conf
Deduced social networks for an educational digital library.
JCDL
Monika Akbar, Clifford A. Shaffer, Edward A. Fox
2012 A conf
OpenDSA: a creative commons active-ebook (abstract only).
SIGCSE
Eric Fouh, Maoyuan Sun, Clifford A. Shaffer
2012 A conf
User type clustering to refine search and browse for educational resources (abstract only).
SIGCSE
Monika Akbar, Clifford A. Shaffer
2011 B conf
Digital Library 2.0 for Educational Resources.
TPDL
Monika Akbar, Weiguo Fan, Clifford A. Shaffer, Yinlin Chen, Lillian N. Cassel, Lois M. L. Delcambre, Daniel D. Garcia, Gregory W. Hislop, Frank M. Shipman III, Richard Furuta, B. Stephen Carpenter II, Hao-wei Hsieh, Bob Siegfried, Edward A. Fox
2011 A conf
Getting algorithm visualizations into the classroom.
SIGCSE
Clifford A. Shaffer, Monika Akbar, Alexander Joel D. Alon, Michael Stewart, Stephen H. Edwards
2011 B conf
How educators find educational resources online.
ITiCSE
Monika Akbar, Weiguo Fan, Lillian N. Cassel, Lois M. L. Delcambre, Clifford A. Shaffer, Edward A. Fox, Yinlin Chen
2011 — conf
OpenDSA: beginning a community active-eBook project.
Koli Calling
Clifford A. Shaffer, Ville Karavirta, Ari Korhonen, Thomas L. Naps
2011 B conf
Scheduling and student performance.
ITiCSE
Clifford A. Shaffer, Stephen H. Edwards
2010 J jnl
Algorithm Visualization: The State of the Field.
ACM Trans. Comput. Educ.
Clifford A. Shaffer, Matthew L. Cooper, Alexander Joel D. Alon, Monika Akbar, Michael Stewart, Sean P. Ponce, Stephen H. Edwards
2010 A conf
Building an online educational community for algorithm visualization.
SIGCSE
Clifford A. Shaffer, Thomas L. Naps, Susan H. Rodger, Stephen H. Edwards
2010 — conf
Ensemble PDP-8: eight principles for distributed portals.
JCDL
Edward A. Fox, Yinlin Chen, Monika Akbar, Clifford A. Shaffer, Stephen H. Edwards, Peter Brusilovsky, Daniel D. Garcia, Lois M. L. Delcambre, Felicia Decker, David W. Archer, Richard Furuta, Frank M. Shipman III, Stephen Carpenter, Lillian N. Cassel
2010 J jnl
Model Composition for Macromolecular Regulatory Networks.
IEEE ACM Trans. Comput. Biol. Bioinform.
Ranjit Randhawa, Clifford A. Shaffer, John J. Tyson
2010 Misc conf
Multistate modeling and simulation for regulatory networks.
WSC
Zhen Liu, Umme Juka Mobassera, Clifford A. Shaffer, Layne T. Watson, Yang Cao
2009 J jnl
Model aggregation: a building-block approach to creating large macromolecular regulatory networks.
Bioinform.
Ranjit Randhawa, Clifford A. Shaffer, John J. Tyson
2009 — ed.
Proceedings of the 2009 Spring Simulation Multiconference, SpringSim 2009, San Diego, California, USA, March 22-27, 2009
SpringSim
Gabriel A. Wainer, Clifford A. Shaffer, Robert M. McGraw, Michael J. Chinni
2009 — conf
Stochastic cell cycle modeling for budding yeast.
SpringSim
Tae-Hyuk Ahn, Pengyuan Wang, Layne T. Watson, Yang Cao, Clifford A. Shaffer, William T. Baumann
2008 — conf
Converting macromolecular regulatory models from deterministic to stochastic formulation.
SpringSim
Pengyuan Wang, Ranjit Randhawa, Clifford A. Shaffer, Yang Cao, William T. Baumann
2008 J jnl
Deterministic parallel global parameter estimation for a model of the budding yeast cell cycle.
J. Glob. Optim.
Thomas D. Panning, Layne T. Watson, Nicholas A. Allen, Katherine C. Chen, Clifford A. Shaffer, John J. Tyson
2007 J jnl
A Mathematical Programming Formulation for the Budding Yeast Cell Cycle.
Simul.
Thomas D. Panning, Layne T. Watson, Clifford A. Shaffer, John J. Tyson
2007 A conf
Algorithm visualization: a report on the state of the field.
SIGCSE
Clifford A. Shaffer, Matthew Cooper, Stephen H. Edwards
2007 — conf
Fusing and composing macromolecular regulatory network models.
SpringSim (2)
Ranjit Randhawa, Clifford A. Shaffer, John J. Tyson
2007 J jnl
S
Softw. Pract. Exp.
Dhananjay Mishra, Clifford A. Shaffer, Naren Ramakrishnan, Layne T. Watson, Kyung Kyoon Bae, Jian He, Alex Verstak, William H. Tranter
2006 Misc conf
Challenges for modeling and simulation methods in systems biology.
WSC
Herbert M. Sauro, David Harel, Marta Z. Kwiatkowska, Clifford A. Shaffer, Adelinde M. Uhrmacher, Michael Hucka, Pedro Mendes, Lena Strömbäck, John J. Tyson
2006 J jnl
Experiences teaching a graduate research methods course.
ACM SIGCSE Bull.
Clifford A. Shaffer
2006 J jnl
The JigCell Model Builder: A Spreadsheet Interface for Creating Biochemical Reaction Network Models.
IEEE ACM Trans. Comput. Biol. Bioinform.
Marc Vass, Clifford A. Shaffer, Naren Ramakrishnan, Layne T. Watson, John J. Tyson
2006 Misc conf
The role of composition and aggregation in modeling macromolecular regulatory networks.
WSC
Clifford A. Shaffer, Ranjit Randhawa, John J. Tyson
2005 Misc conf
Building modeling tools that support verification, validation, and testing for the domain expert.
WSC
Nicholas A. Allen, Clifford A. Shaffer, Layne T. Watson
2004 A conf
A Hierarchical Parallel Scheme for Global Parameter Estimation in Systems Biology.
IPDPS
Jian He, Masha Sosonkina, Clifford A. Shaffer, John J. Tyson, Layne T. Watson, Jason W. Zwolak
2004 A conf
Buffer pools and file processing projects for an undergraduate data structures course.
SIGCSE
Clifford A. Shaffer
2004 B conf
Defect detection on hardwood logs using high resolution three dimensional laser scan data.
ICIP
Liya Thomas, Lamine Mili, Clifford A. Shaffer, Ed Thomas
2004 A conf
Effective features of algorithm visualizations.
SIGCSE
Purvi Saraiya, Clifford A. Shaffer, D. Scott McCrickard, Chris North
2004 J jnl
Globally optimal transmitter placement for indoor wireless communication systems.
IEEE Trans. Wirel. Commun.
Jian He, Alex Verstak, Layne T. Watson, C. A. Stinson, Naren Ramakrishnan, Clifford A. Shaffer, Theodore S. Rappaport, Christopher Robert Anderson, Kyung Kyoon Bae, Jing Jiang, William H. Tranter
2004 J jnl
The JigCell Model Builder and Run Manager.
Bioinform.
Marc Vass, Nicholas A. Allen, Clifford A. Shaffer, Naren Ramakrishnan, Layne T. Watson, John J. Tyson
2004 J jnl
Towards integrated PSEs for wireless communications: experiences with the S
ACM SIGMOBILE Mob. Comput. Commun. Rev.
Roger R. Skidmore, Alex Verstak, Naren Ramakrishnan, Theodore S. Rappaport, Layne T. Watson, Jian He, Srinidhi Varadarajan, Clifford A. Shaffer, Jeremy K.-P. Chen, Kyung Kyoon Bae, Jing Jiang, William H. Tranter
2003 J jnl
BSML: A binding schema markup language for data interchange in problem solving environments.
Sci. Program.
Alex Verstak, Naren Ramakrishnan, Layne T. Watson, Jian He, Clifford A. Shaffer, Kyung Kyoon Bae, Jing Jiang, William H. Tranter, Theodore S. Rappaport
2003 J jnl
From landscapes to waterscapes: A PSE for landuse change analysis.
Eng. Comput.
E. J. Rubin, Clifford A. Shaffer, Naren Ramakrishnan, Layne T. Watson, Randel L. Dymond, David F. Kibler, R. Dietz, Jeffrey G. Chanat, Vinod K. Lohani, Darrell Bosch, Cameron Speir
2003 J jnl
Improving the Development Process for Eukaryotic Cell Cycle Models with a Modeling Support Environment.
Simul.
Nicholas A. Allen, Clifford A. Shaffer, Naren Ramakrishnan, Marc T. Vass, Layne T. Watson
2003 Misc conf
Next generation modeling II - applications: improving the development process for eukaryotic cell cycle models with a modeling support environment.
WSC
Nicholas A. Allen, Clifford A. Shaffer, Marc Vass, Naren Ramakrishnan, Layne T. Watson
2002 J jnl
BSML: A Binding Schema Markup Language for Data Interchange in Problem Solving Environments (PSEs)
CoRR
Alex Verstak, Naren Ramakrishnan, Layne T. Watson, Jian He, Clifford A. Shaffer, Kyung Kyoon Bae, Jing Jiang, William H. Tranter, Theodore S. Rappaport
2002 J jnl
Dynamic Data Structures for a Direct Search Algorithm.
Comput. Optim. Appl.
Jian He, Layne T. Watson, Naren Ramakrishnan, Clifford A. Shaffer, Alex Verstak, Jing Jiang, Kyung Kyoon Bae, William H. Tranter
2002 J jnl
Programming environments for multidisciplinary Grid communities.
Concurr. Comput. Pract. Exp.
Naren Ramakrishnan, Layne T. Watson, Dennis G. Kafura, Calvin J. Ribbens, Clifford A. Shaffer
2002 A conf
S4W: Globally Optimized Design of Wireless Communications Systems.
IPDPS
Alex Verstak, Jian He, Layne T. Watson, Naren Ramakrishnan, Clifford A. Shaffer, Theodore S. Rappaport, Christopher Robert Anderson, Kyung Kyoon Bae, Jing Jiang, William H. Tranter
2002 B conf
Supporting creativity in problem solving environments.
Creativity & Cognition
Marc Vass, John M. Carroll, Clifford A. Shaffer
2002 J jnl
Using Hierarchical Data Mining to Characterize Performance of Wireless System Configurations
CoRR
Alex Verstak, Naren Ramakrishnan, Kyung Kyoon Bae, William H. Tranter, Layne T. Watson, Jian He, Clifford A. Shaffer, Theodore S. Rappaport
2001 J jnl
Resource sharing for replicated synchronous groupware.
IEEE/ACM Trans. Netw.
James Begole, Randall B. Smith, Craig A. Struble, Clifford A. Shaffer
2001 J jnl
VizCraft: a problem-solving environment for aircraft configuration design.
Comput. Sci. Eng.
Amit Goel, Chuck A. Baker, Clifford A. Shaffer, Bernard Grossman, William H. Mason, Layne T. Watson, Raphael T. Haftka
1999 J jnl
An Analysis of a Course-Oriented Electronic Mailing List.
Comput. Sci. Educ.
Stephen H. Edwards, Clifford A. Shaffer
1999 J jnl
Flexible collaboration transparency: supporting worker independence in replicated application-sharing systems.
ACM Trans. Comput. Hum. Interact.
James Begole, Mary Beth Rosson, Clifford A. Shaffer
1999 A conf
VizCraft: A Multidimensional Visualization Tool for Aircraft Configuration Design.
IEEE Visualization
Amit Goel, Chuck Baker, Clifford A. Shaffer, Bernard Grossman, Raphael T. Haftka, William H. Mason, Layne T. Watson
1999 J jnl
WBCSim: A Prototype Problem Solving Environment for Wood-Based Composites Simulations.
Eng. Comput.
Amit Goel, Constantinos Phanouriou, Frederick A. Kamke, Calvin J. Ribbens, Clifford A. Shaffer, Layne T. Watson
1998 A* conf
Supporting Worker Independence in Collaboration Transparency.
ACM Symposium on User Interface Software and Technology
James Begole, Mary Beth Rosson, Clifford A. Shaffer
1998 A conf
Visualization for multiparameter aircraft designs.
IEEE Visualization
Clifford A. Shaffer, Duane L. Knill, Layne T. Watson
1997 J jnl
Leveraging Java Applets: Toward Collaboration Transparency in Java.
IEEE Internet Comput.
James Begole, Craig A. Struble, Clifford A. Shaffer
1997 A* conf
Transparent Sharing of Java Applets: A Replicated Approach.
ACM Symposium on User Interface Software and Technology
James Begole, Craig A. Struble, Clifford A. Shaffer, Randall B. Smith
1996 A conf
Using the Swan data structure visualization system for computer science education.
SIGCSE
Clifford A. Shaffer, Lenwood S. Heath, Jun Yang
1995 A conf
SWAN: A Data Structure Visualization System.
GD
Jun Yang, Clifford A. Shaffer, Lenwood S. Heath
1994 J jnl
Analysis of the Worst Case Space Complexity of a PR Quadtree.
Inf. Process. Lett.
Sriram V. Pemmaraju, Clifford A. Shaffer
1993 — conf
A Paging Scheme for Pointer-Based Quadtrees.
SSD
Clifford A. Shaffer, Patrick R. Brown
1993 J jnl
Generalized comparison of quadtree and bintree storage requirements.
Image Vis. Comput.
Clifford A. Shaffer, Ramana Juvvadi, Lenwood S. Heath
1992 J jnl
A real-time robot arm collision avoidance system.
IEEE Trans. Robotics Autom.
Clifford A. Shaffer, Gregory M. Herb
1992 — ch.
Exact Computation of 2-d intersections.
Graphics Gems III
Clifford A. Shaffer, Charles Feustel
1991 — conf
A paging scheme for pointer-based quadtrees (abstract only).
ACM Conference on Computer Science
Patrick R. Brown, Clifford A. Shaffer, Robert E. Webber
1991 J jnl
An optimal boundary to quadtree conversion algorithm.
CVGIP Image Underst.
Mark R. Lattanzi, Clifford A. Shaffer
1991 J jnl
Linear time distance transforms for quadtrees.
CVGIP Image Underst.
Clifford A. Shaffer, Quentin F. Stout
1990 J jnl
A New Region Expansion for Quadtrees.
IEEE Trans. Pattern Anal. Mach. Intell.
Chuan-Heng Ang, Hanan Samet, Clifford A. Shaffer
1990 — conf
A Real-Time Robot Collision Avoidance System (Abstract).
ACM Conference on Computer Science
Clifford A. Shaffer, Gregory M. Herb
1990 J jnl
QUILT: a geographic information system based on quadtrees.
Int. J. Geogr. Inf. Sci.
Clifford A. Shaffer, Hanan Samet, Randal C. Nelson
1990 J jnl
Real-time algorithms and data structures for underwater mapping.
IEEE Trans. Syst. Man Cybern.
David N. Oskard, Tsai-Hong Hong, Clifford A. Shaffer
1990 J jnl
Set Operations for Unaligned Linear Quadtrees.
Comput. Vis. Graph. Image Process.
Clifford A. Shaffer, Hanan Samet
1989 — conf
A Full Resolution Elevation Representation Requiring Three Bits per Pixel.
SSD
Clifford A. Shaffer
1988 J jnl
A formula for computing the number of quadtree node fragments created by a shift.
Pattern Recognit. Lett.
Clifford A. Shaffer
1988 J jnl
Algorithm to expand regions represented by linear quadtrees.
Image Vis. Comput.
Clifford A. Shaffer, Hanan Samet
1987 J jnl
Digitizing the Plane with Cells of Nonuniform Size.
Inf. Process. Lett.
Hanan Samet, Clifford A. Shaffer, Robert E. Webber
1987 J jnl
Optimal quadtree construction algorithms.
Comput. Vis. Graph. Image Process.
Clifford A. Shaffer, Hanan Samet
1985 J jnl
A Model for the Analysis of Neighbor Finding in Pointer-Based Quadtrees.
IEEE Trans. Pattern Anal. Mach. Intell.
Hanan Samet, Clifford A. Shaffer
1984 J jnl
A geographic information system using quadtrees.
Pattern Recognit.
Hanan Samet, Azriel Rosenfeld, Clifford A. Shaffer, Robert E. Webber
1983 J jnl
Quadtree region representation in cartography: Experimental results.
IEEE Trans. Syst. Man Cybern.
Hanan Samet, Azriel Rosenfeld, Clifford A. Shaffer, Robert E. Webber