Karthik Ramani

The Influence of Toy Design Activities on Middle School Students’ Understanding of the Engineering Design Processes

Ninger Zhou, Nielsen L. Pereira, Tarun Thomas George, Jeffrey Alperovich, Joran Booth, Senthil Chandrasegaran, Jeffrey David Tew, Devadatta M. Kulkarni, Karthik Ramani

Journal of Science Education and Technology (2017): 1-13.

Study Researches ‘Gorilla-Arm’ Fatigue in Mid-Air Computer Usage

Arm fatigue accumulates during a prolonged use of mid-air interfaces such as Oculus Rift. (Purdue University Photo/Brian Huchel) WEST LAFAYETTE, Ind. — Researchers at Purdue… Continue reading...

BikeGesture: User Elicitation and Performance of Micro Hand Gesture as Input for Cycling

Yanke Tan, Sang Ho Yoon, Karthik Ramani

In Proceedings of the 2017 CHI Conference Extended Abstracts on Human Factors in Computing Systems (CHI EA' 17: 2147-2154), Denver, CO, May 6-11, 2017

Modeling Cumulative Arm Fatigue in Mid-Air Interaction based on Perceived Exertion and Kinetics of Arm Motion

Sujin Jang, Wolfgang Stuerzlinger, Satyajit Ambike, Karthik Ramani

In Proceedings of the ACM Conference on Human Factors in Computing Systems (CHI 2017: 3328-3339), Denver, CO, May 6-11, 2017 (Acceptance Rate: 25%)

WireFab: Mix-Dimension Modeling and Fabrication for 3D Mesh Models

Min Liu, Yunbo Zhang, Jing Bai, Yuanzhi Cao, Jeffrey Alperovich, Karthik Ramani

In Proceedings of the ACM Conference on Human Factors in Computing Systems (CHI 2017: 965-976), Denver, CO, May 6-11, 2017 (Acceptance Rate: 25%)

Window-Shaping: 3D Design Ideation by Creating on, Borrowing from, and Looking at the Physical World

Ke Huo, Vinayak, Karthik Ramani

In Proceedings of the TEI'17: Tenth International Conference on Tangible, Embedded, and Embodied Interaction. ACM. (TEI'17: 37-45) , Yokohama, Japan, Mar., 2017

Co-3Deator: A Team-First Collaborative 3D Design Ideation Tool

Cecil Piya, Vinayak, Senthil Chandrasegaran, Niklas Elmqvist, Karthik Ramani

In Proceedings of the ACM Conference on Human Factors in Computing Systems (CHI 2017: 6581-6592), Denver, CO, May 6-11, 2017 (Acceptance Rate: 25%)

Deconvolving Feedback Loops in Recommender Systems

Ayan Sinha, David F. Gleich, Karthik Ramani

In Proceedings of the Thirtieth Annual Conference on Neural Information Processing Systems (NIPS'16) , Barcelona, Spain, 2016

Window-Shaping: 3D Design Ideation in Mixed Reality

Ke Huo, Vinayak, Karthik Ramani

In Proceedings of the 2016 Symposium on Spatial User Interaction, Tokyo, Japan, 2016 Oct.

TRing: Instant and Customizable Interactions with Objects Using an Embedded Magnet and a Finger-Worn Device

Sang Ho Yoon, Yunbo Zhang, Ke Huo, Karthik Ramani

In Proceedings of the 29th Annual ACM Symposium on User Interface Software & Technology (UIST'16) , Tokyo, Japan, 2016 (Acceptance Rate: 20.6%)

FEASY: A Sketch-based Tool for Finite Element Analysis

Sundar Murugappan, Cecil Piya, Maria C. Yang, Karthik Ramani

Journal of Computing and Information Science in Engineering, Volume 16, Issue 3, September 2016

The intrinsic geometric structure of protein-protein interaction networks for protein interaction prediction

Yi Fang, Mengtian Sun, Guoxian Dai, and Karthik Ramani

IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB) TCBB Homepage archive Volume 13 Issue 1, January/February 2016 Pages 76-85

Proto-TAI++: Exploring perceptually consistent creation of planar shape assemblies through multi-modal tangible interactions

Cecil Piya, Vinayak, Karthik Ramani

Journal of Computing and Information Science in Engineering, Volume 16, Issue 3, September 2016

This series of photos shows the use of a new system, called DeepHand, developed by researchers in Purdue University’s C Design Lab. It is capable of “deep learning” to understand the hand’s nearly endless complexity of joint angles and contortions, an advance that will be needed for future systems that allow people to interact with virtual environments in virtual and augmented reality. (Purdue University image/C Design Lab)

New tool for virtual and augmented reality uses ‘deep learning’

WEST LAFAYETTE, Ind. – Future systems that allow people to interact with virtual environments will require computers to interpret the human hand’s nearly endless variety… Continue reading...

DeepHand: Robust Hand Pose Estimation by Completing a Matrix Imputed with Deep Features

Ayan Sinha*, Chiho Choi*, and Karthik Ramani (* denotes equal contribution)

In Proc. IEEE Conference on Computer Vision and Pattern Recognition (CVPR) 2016, Las Vegas, USA.

The Design For Additive Manufacturing Worksheet

Joran W. Booth, Jeffery Alperovich, Tahira N. Reid, Karthik Ramani

Proceedings of the ASME 2016 International Design Engineering Technical Conferences &Computers and Information in Engineering ConferenceIDETC/CIE 2016August 21-24, 2016, Charlotte, North Carolina, USA

RealFusion: An Interactive Workflow for Repurposing Real-World Objects towards Early-stage Creative Ideation

Cecil Piya, Vinayak, Yunbo Zhang, Karthik Ramani

In Proceedings of Graphics Interface 2016, Victoria, BC, Canada

CardBoardiZer: Creatively Customize, Articulate and Fold 3D Mesh Models

Yunbo Zhang,Wei Gao, Luis Paredes, Karthik Ramani

Proceedings of the 2016 CHI Conference on Human Factors in Computing Systems (pp. 897-907). ACM.

Wearable Textile Input Device with Multimodal Sensing for Eyes-Free Mobile Interaction during Daily Activities

Sang Ho Yoon, Ke Huo, Karthik Ramani

Pervasive and Mobile Computing (2016), 33, 17-31

Optimal Fitting of Strain-Controlled Flattenable Mesh Surfaces

Yunbo Zhang, Charlie C. L. Wang, Karthik Ramani

The International Journal of Advanced Manufacturing Technology, 1-15.

Cubimorph: Designing Modular Handheld Shape Changing Devices for End-Users

Roudaut, Anne and Krusteva, Diana and Karnik, Abhijit Anil and McCoy, Mike and Ramani, Karthik and Subramanian, Sriram

The International Conference on Robotics and Automation (ICRA) 2016, Stockholm, Sweden.

TMotion: Embedded 3D Mobile Input using Magnetic Sensing Technique

Sang Ho Yoon, Ke Huo, Karthik Ramani

In Proceedings of the 10th International Conference on Tangible, Embedded, and Embodied Interaction (TEI'16), Eindhoven, Netherlands, 2016 (Acceptance Rate: 27%)

MobiSweep: Exploring Spatial Design Ideation Using a Smartphone as a Hand-held Reference Plane

Vinayak, Devarajan Ramanujan, Cecil Piya, Karthik Ramani

In Proceedings of the Tenth International Conference on Tangible, Embedded, and Embodied Interaction, Netherlands, 2016

Interventions for Teaching Sketching Skills and Reducing Inhibition for Novice Engineering Designers

Joran W. Booth, Elkin A. Taborda, Karthik Ramani, and Tahira Reid

Design Studies, 43, 1-23.

Extracting Hand Grasp & Motion for Intent Expression in Mid-Air Shape Deformation: A Concrete & Iterative Exploration through a Virtual Pottery Application

Vinayak and Karthik Ramani

Computers & Graphics, Volume 55, April 2016, Pages 143-156, ISSN 0097-8493, (http://dx.doi.org/10.1016/j.cag.2015.10.012.)

A Collaborative Filtering Approach to Real-Time Hand Pose Estimation

Chiho Choi, Ayan Sinha, Joon Hee Choi, Sujin Jang, and Karthik Ramani

In Proc. IEEE International Conference on Computer Vision (ICCV) 2015, Santiago, Chile.

Empirical Studies of Functional Decomposition in Early Design

Joran W. Booth, Ahbinav Bhasin, Tahira Reid, and Karthik Ramani

Proceedings of the ASME 2015 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference, IDETC/CIE 2015 August 2-5, 2015, Boston, Massachusetts, USA

Comparing Functional Analysis Methods for Product Dissection Tasks

Joran W. Booth, Tahira N. Reid, Claudia Eckert, Karthik Ramani

Journal of Mechanical Design J. Mech. Des 137(8), 081101 (Aug 01, 2015) (10 pages) doi: 10.1115/1.4030232

MotionFlow for pattern analysis of human motion data. (a) Pose tree: a simplified representation of multiple motion sequences
aggregating the same transitions into a tree diagram. (b) A window dedicated to show a subtree structure based on a query. (c)
Space-filling treemap representation of the motion sequence data using slice-and-dice layout. (d) Node-link diagram of pose
clusters (nodes) and transitions (links) between them. This view supports interactive partition-based pose clustering. (e) Multi-tab
interface for storing unique motion patterns. (f) Animations of single or multiple selected human motions.

MotionFlow: Visual Abstraction and Aggregation of Sequential Patterns in Human Motion Tracking Data

Sujin Jang, Niklas Elmqvist, and Karthik Ramani

IEEE Transaction on Visualization and Computer Graphics (TVCG) vol.22, no.1, pp.21-30, Jan. 31, 2016 / IEEE Conference on Visual Analytics Science and Technology (VAST) Oct. 25-30, Chicago, IL, 2015. In print.

A framework for visualization-driven eco-conscious design exploration

Devarajan Ramanujan, William Z. Bernstein, William Benjamin, Karthik Ramani, Niklas Elmqvist, Devadatta Kulkarni, Jeffrey Tew

Journal of Computing and Information Science in Engineering. 2015 Dec 1;15(4):041010.

Mutually coordinated visualization of product and supply chain metadata for sustainable design

William Z. Bernstein, Devarajan Ramanujan, Devadatta Kulkarni, Jeffrey Tew, Niklas Elmqvist, Fu Zhao, Karthik Ramani

Journal of Mechanical Design. 2015 Dec 1;137(12):121101.

The Status, Challenges, and Future of Additive Manufacturing in Engineering

Wei Gao, Yunbo Zhang, Devarajan Ramanujan, Karthik Ramani, Yong Chen, Christopher B. Williams, Charlie C.L. Wang, Yung C. Shin, Song Zhang, Pablo D. Zavattieri

Computer-Aided Design, doi:10.1016/j.cad.2015.04.001

Hand Grasp and Motion for Intent Expression in Mid-Air Virtual Pottery

Vinayak and Karthik Ramani

In Proceedings of Graphics Interface 2015 (GI '15). Canadian Information Processing Society, Toronto, Ont., Canada, Canada

A Gesture-free Geometric Approach for Mid-Air Expression of Design Intent

Vinayak and Karthik Ramani

Computer-Aided Design (Elsevier), Available online 17 July 2015, ISSN 0010-4485, http://dx.doi.org/10.1016/j.cad.2015.06.006.

Sketcholution: Interaction Histories for Sketching

Zhenpeng Zhao, William Benjamin, Niklas Elmqvist, Karthik Ramani

International Journal of Human-Computer Studies, 82 (2015) 11–20

Informing Early Design Via Crowd-based Co-creation

Devarajan Ramanujan, Vinayak, Yash Nawal, Tahira Reid, Karthik Ramani

ASME International Design Engineering Technical Conferences, August 2-5, Boston ,MA

HandiMate: Create and Animate using everyday objects

Jasjeet Singh Seehra, Ansh Verma, Kylie Peppler, Karhik Ramani

Proceedings of the ACM Conference on Tangible Embedded and Embodied Interactions, Stanford University, January 15-19, 2015

Heat-Passing Framework for Robust Interpretation of Data in Networks

Yi Fang, Mengtian Sun, Karthik Ramani

PLoS ONE 10(2), doi:10.1371/journal.pone.0116121, 2015

GestureAnalyzer: Visual Analytics for Pattern Analysis of Mid-Air Hand Gestures

Sujin Jang, Niklas Elmqvist, Karthik Ramani

Proceedings of the ACM Symposium on Spatial User Interaction, October 4-5, 2014, Honolulu, HI, USA

Art Meets Engineering Design: An Approach for Reducing Sketch Inhibition in Engineers During the Design Process

Joran W. Booth, Abhinav K. Bhasin, and Karthik Ramani

ASME IDETC/CIE 2014

Evaluating the Bottom-Up Method for Functional Decomposition in Product Dissection Tasks

Joran W. Booth, Abhinav K. Bhasin, Tahira Reid, Karthik Ramani

ASME IDETC/CIE 2014

Prioritizing Design for Environment Strategies Using a Stochastic Analytic Hierarchy Process

Devarajan Ramanujan, William Z. Bernstein, Mikko Koho, Fu Zhao, Karthik Ramani

Journal of Mechanical Design, 136(7), 071002

Contextualizing Environmental Sustainability in Design Engineering Curricula

Devarajan Ramanujan, William Z. Bernstein, Monica Cardella, Karthik Ramani

ASME IDETC/CIE 2014

PROTO-TAI: Quick Design Prototyping using Tangible Assisted Interfaces

Cecil Piya, Karthik Ramani

Proceedings of the ASME 2014 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference IDETC/CIE 2014, August 16-20, 2014, Buffalo, NY, USA

Lateral and vertical transformations observed in the study. Lateral transformations can occur through modification of an existing sketch, or through the creation of a new sketch inspired from an existing sketch, to create a new idea. Vertical transformations can occur through adding details such as dimensions, annotations, or features to an existing sketch, or through a new sketch showing a different detail, to develop an existing idea.

Collaborative Sketching with skWiki: A Case Study

Senthil Chandrasegaran, Sriram Karthik Badam, Zhenpeng Zhao, Niklas Elmqvist, Lorraine Kisselburgh, Karthik Ramani

Proceedings of the ASME IDETC/CIE Conference, Aug 17-20,Buffalo, NY, 2014.

$We present a screenshot of the ViSER tool. The supply chain shown is representative of the peripheral computer equipment industry. Each callout points to a specific feature of the ViSER platform and are described as follows: (A) a directed graph that represents the supply chain network as the edges connected to the selected nodes are shown in red, (B) a representation fo the product system graph oriented by a combination of force directed physics and user manipulation, (C) change propagation results for selected nodes of interest, (D) a comparison chart of impact categories for selected nodes of interest, (E) sparklines for each criterion with outliers shown in red and (F) the profile of selected node attributes, e.g.\ time and smog. A video demonstration of ViSER can be found here: \href{http://youtu.be/pDJAqW9H3ME}{\textcolor{blue}{http://youtu.be/pDJAqW9H3ME}}.$