2020
Matthew Evanusa, Cornelia Fermüller, Yiannis Aloimonos
The researchers present a novel Deep Reservoir Network for time series prediction and classification that learns through non-differentiable hidden reservoir layers using a biologically-inspired back propagation alternative. This alternative, called Direct Feedback Alignment, resembles global dopamine signal broadcasting in the brain. The researchers demonstrate its efficacy on two real-world multidimensional time series datasets.
arXiv.org
Matthew Evanusa, Cornelia Fermüller, Yiannis Aloimonos
The researchers show that a large, deep layered spiking neural network with dynamical, chaotic activity mimicking the mammalian cortex with biologically-inspired learning rules, such as STDP, is capable of encoding information from temporal data.
arXiv.org
Matthew Evanusa, Snehesh Shrestha, Michelle Girvan, Cornelia Fermüller, Yiannis Aloimonos
Demonstrates the use of a backpropagation hybrid mechanism for parallel reservoir computingwith a meta ring structure and its application on a real-world gesture recognition dataset. This mechanism can be used as an alternative to state of the art recurrent neural networks, LSTMs and GRUs.
arXiv.org
Eadom Dessalene, Michael Maynord, Chinmaya Devaraj, Cornelia Fermüller, Yiannis Aloimonos
Introduces Egocentric Object Manipulation Graphs (Ego-OMG):a novel representation for activity modeling and anticipation of near future actions.
arXiv.org
Anton Mitrokhin, Peter Sutor, Douglas Summers-Stay, Cornelia Fermüller, Yiannis Aloimonos
By using hashing neural networks to produce binary vector representations of images, the authors show how hyperdimensional vectors can be constructed such that vector-symbolic inference arises naturally out of their output.
Frontiers in Robotics and AI
Anton Mitrokhin, Zhiyuan Hua, Cornelia Fermüller, Yiannis Aloimonos
Presents a Graph Convolutional neural network for the task of scene motion segmentation by a moving camera. Describes spatial and temporal features of event clouds, which provide cues for motion tracking and segmentation.
Computer Vision Foundation
Chethan M. Parameshwara, Nitin J. Sanket, Arjun Gupta, Cornelia Fermüller, Yiannis Aloimonos
A solution to multi-object motion segmentation using a combination of classical optimization methods along with deep learning and does not require prior knowledge of the 3D motion and the number and structure of objects.
arXiv.org
John Kanu, Eadom Dessalene, Xiaomin Lin, Cornelia Fermüller, Yiannis Aloimonos
A novel robotic agent framework for learning to perform temporally extended tasks using spatial reasoning in a deep reinforcement learning framework, by sequentially imagining visual goals and choosing appropriate actions to fulfill imagined goals.
arXiv.org
2020
Maria Coelho, Mark Austin, Shivam Mishra, Mark Blackburn
Due to remarkable advances in computer, communications and sensing technologies over the past three decades,large-scale urban systems are now far more heterogeneous and automated than their predecessors. They may, in fact, be connected to other types of systems in completely new ways. These characteristics make the tasks of system design, analysis and integration of multi-disciplinary concerns much more difficult than in the past. We believe these challenges can be addressed by teaching machines to understand urban networks. This paper explores opportunities for using a recently developed graph autoencoding approach to encode the structure and associated network attributes as low-dimensional vectors. We exercise the proposed approach on a problem involving identification of leaks in urban water distribution systems.
IARIA International Journal on Advances in Networks and Services
2021
Christos Mavridis, John Baras
An online prototype-based learning algorithm for clustering and classification, based on the principles of deterministic annealing.
arXiv.org
2020
Fatemeh Alimardani, Nilesh Suriyarachchi, Faizan Tariq, John Baras
Explores the integration of two of the most common traffic management strategies, namely, ramp metering and route guidance, into existing highway networks with human-driven vehicles.
Chapter in the forthcoming book, Transportation Systems for Smart, Sustainable, Inclusive and Secure Cities
Christos Mavridis, John Baras
The researchers investigate the convergence properties of stochastic vector quantization (VQ) and its supervised counterpart, Learning Vector Quantization (LVQ), using Bregman divergences. We employ the theory of stochastic approximation to study the conditions on the initialization and the Bregman divergence generating functions, under which,the algorithms converge to desired configurations. These results formally support the use of Bregman divergences, such as the Kullback-Leibler divergence, in vector quantization algorithms.
johnbaras.com
Aneesh Raghavan, John Baras
This paper pertains to stochastic multi-agent decision-making problems. The authors revisit the concepts of event-state-operation-structure and relationship of incompatibility from literature, and use them as a tool to study the algebraic structure of a set of events. They consider a multi-agent hypothesis testing problem and show that the set of events forms an ortholattice. They then consider the binary hypothesis testing problem wth finite observation space.
arXiv.org
Aneesh Raghavan, John Baras
This paper pertains to hypothesis testing problems, specifically the problem of collaborative binary hypothesis testing.
arXiv.org
Ion Matei, Johan de Kleer, Christoforos Somarakis, Rahul Rai, John Baras
To understand changes in physical systems and facilitate decisions, explaining how model predictions are made is crucial. In this paper the authors use model-based interpretability, where models of physical systems are constructed by composing basic constructs that explain locally how energy is exchanged and transformed.
arXiv.org
2019
Mohammad Mamduhi, Karl Johansson, Ehsan Hashemi, John Baras
This paper proposes an event-triggered, add-on safety mechanism in a networked vehicular system that can adjust control parameters for timely braking while maintaining maneuverability.
arXiv.org
2020
Kushal Chakrabarti, Nirupam Gupta, and Nikhil Chopra
This paper considers the multi-agent linear least-squares problem in a server-agent network. The system comprises multiple agents, each having a set of local data points, that are connected to a server. The goal for the agents is to compute a linear mathematical model that optimally fits the collective data points held by all the agents, without sharing their individual local data points. The paper proposes an iterative pre-conditioning technique that mitigates the deleterious effect of the conditioning of data points on the rate of convergence of the gradient-descent method.
arXiv.org
2020
Samuel Huang, Rance Cleaveland
This paper describes a technique for inferring temporal-logic properties for sets of finite data streams. Such data streams arise in many domains, including server logs, program testing, and financial and marketing data; temporal-logic formulas that are satisfied by all data streams in a set can provide insight into the underlying dynamics of the system generating these streams. The authors' approach makes use of so-called Linear Temporal Logic (LTL) queries, which are LTL formulas containing a missing subformula and interpreted over finite data streams. Solving such a query involves computing a subformula that can be inserted into the query so that the resulting grounded formula is satisfied by all data streams in the set. The paper describes an automaton-driven approach to solving this query-checking problem and demonstrates a working implementation via a pilot study.
arXiv.org
Peter Fontana, Rance Cleaveland
This report contains the descriptions of the timed automata (models) and the prop-erties (specifications) that are used as the “benchmark examples in Data structure choices for on-the-fly model checking of real-time systems” and “The power of proofs: New algorithms for timed automata model checking.” The four models from those sources are: CSMA, FISCHER, LEADER, and GRC. Additionally we include in this re-port two additional models: FDDI and PATHOS. These six models are often used to benchmark timed automata model checker speed throughout timed automata model checking papers.
arXiv.org
Rance Cleaveland
This paper shows how the use of Structural Operational Semantics (SOS) inthe style popularized by the process-algebra community can lead to a more succinct and useful construction for building finite automata from regular expressions.
arXiv.org
2021
Carol Espy-Wilson
Dr. Espy-Wilson discusses a speech inversion system her group has developed that maps the acoustic signal to vocal tract variables (TVs). The trajectories of the TVs show the timing and spatial movement of speech gestures. She explains how her group uses machine learning techniques to compute articulatory coordination features (ACFs) from the TVs. The ACFs serve as an input into a deep learning model for mental health classification. Espy-Wilson also illustrates the key acoustic differences between speech produced by subjects when they are mentally ill relative to when they are in remission and relative to healthy controls. The ultimate goal of this research is the development of a technology (perhaps an app) for patients that can help them, their therapists and caregivers monitor their mental health status between therapy sessions.
Keynote speech at the 2021 Acoustical Society of America Annual Meeting, June 8, 2021
View a press release from the Acoustical Society of America about this speech
Nadee Seneviratne, Carol Espy-Wilson
The paper proposes a new multi-stage architecture trained on vocal tract variable (TV)-based articulatory coordination features (ACFs) for depression severity classification which clearly outperforms the baseline models. The authors establish that the robustness of ACFs based on TVs holds beyond mere detection of depression and even in severity level classification. This work can be extended to develop a multi-modal system that can take advantage of textual information obtained through Automatic Speech Recognition tools. Linguistic features can reveal important information regarding the verbal content of a depressed patient relating to their mental health condition.
arXiv.org; accepted for Interspeech2021, Aug. 30-Sept. 3, 2021
Yashish Maduwantha, Chris Kitchen, Deanna L. Kelly, Carol Espy-Wilson
This study, conducted with AIM-HI funding, investigates speech articulatory coordination in schizophrenia subjects exhibiting strong positive symptoms (e.g.hallucinations and delusions), using a time delay embedded correlation analysis. It finds a distinction between healthy and schizophrenia subjects in neuromotor coordination in speech.
ResearchGate.net
2020
Saurabh Sahu, Rahul Gupta, Carol Espy-Wilson
Implements three auto-encoder and GAN based models to synthetically generate higher dimensional feature vectors useful for speech emotion recognition from a simpler prior distribution pz.
IEEE Transactions on Affective Computing
2019
Saurabh Sahu, Vikramjit Mitra, Nadee Seneviratne, Carol Espy-Wilson
The paper leverages multi-modal learning and automated speech recognition (ASR) systems toward building a speech-only emotion recognition model.
Interspeech 2019
2020
Matthew Evanusa, Cornelia Fermüller, Yiannis Aloimonos
The researchers present a novel Deep Reservoir Network for time series prediction and classification that learns through non-differentiable hidden reservoir layers using a biologically-inspired back propagation alternative. This alternative, called Direct Feedback Alignment, resembles global dopamine signal broadcasting in the brain. The researchers demonstrate its efficacy on two real-world multidimensional time series datasets.
arXiv.org
Matthew Evanusa, Cornelia Fermüller, Yiannis Aloimonos
The researchers show that a large, deep layered spiking neural network with dynamical, chaotic activity mimicking the mammalian cortex with biologically-inspired learning rules, such as STDP, is capable of encoding information from temporal data.
arXiv.org
Matthew Evanusa, Snehesh Shrestha, Michelle Girvan, Cornelia Fermüller, Yiannis Aloimonos
Demonstrates the use of a backpropagation hybrid mechanism for parallel reservoir computingwith a meta ring structure and its application on a real-world gesture recognition dataset. This mechanism can be used as an alternative to state of the art recurrent neural networks, LSTMs and GRUs.
arXiv.org
Eadom Dessalene, Michael Maynord, Chinmaya Devaraj, Cornelia Fermüller, Yiannis Aloimonos
Introduces Egocentric Object Manipulation Graphs (Ego-OMG):a novel representation for activity modeling and anticipation of near future actions.
arXiv.org
Anton Mitrokhin, Peter Sutor, Douglas Summers-Stay, Cornelia Fermüller, Yiannis Aloimonos
By using hashing neural networks to produce binary vector representations of images, the authors show how hyperdimensional vectors can be constructed such that vector-symbolic inference arises naturally out of their output.
Frontiers in Robotics and AI
Anton Mitrokhin, Zhiyuan Hua, Cornelia Fermüller, Yiannis Aloimonos
Presents a Graph Convolutional neural network for the task of scene motion segmentation by a moving camera. Describes spatial and temporal features of event clouds, which provide cues for motion tracking and segmentation.
Computer Vision Foundation
Chethan M. Parameshwara, Nitin J. Sanket, Arjun Gupta, Cornelia Fermüller, Yiannis Aloimonos
A solution to multi-object motion segmentation using a combination of classical optimization methods along with deep learning and does not require prior knowledge of the 3D motion and the number and structure of objects.
arXiv.org
John Kanu, Eadom Dessalene, Xiaomin Lin, Cornelia Fermüller, Yiannis Aloimonos
A novel robotic agent framework for learning to perform temporally extended tasks using spatial reasoning in a deep reinforcement learning framework, by sequentially imagining visual goals and choosing appropriate actions to fulfill imagined goals.
arXiv.org
2019
Michael Fu
The deep neural networks of AlphaGo and AlphaZero can be traced back to an adaptive multistage sampling (AMS) simulation-based algorithm for Markov decision processed published by HS Chang, Michael C. Fu and Steven I Marcus in Operations Research in 2005. Here, Fu retraces history, talks about the impact of the initial research, and suggests enhancements for the future.
Asian-Pacific Journal of Operational Research
2020
Xiaolong Liu, Seda Aslan, Rachel Hess, Paige Mass, Laura Olivieri, Yue-Hin Loke, Narutoshi Hibino, Mark Fuge, Axel Krieger
Develops a computational framework for automatically designing optimal shapes of patient-specific TEVGs for aorta surgery.
42nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Wei Chen, Mark Fuge
The authors propose a Bayesian optimization approach that only needs to specify an initial search space that does not necessarily include the global optimum, and expands the search space when necessary.
arXiv.org
2019
Eliot Rudnick-Cohen, Shapour Azarm and Jeffrey Herrmann
The paper presents Scenario Generation and Local Refinement Optimization (SGLRO), a new approach for solving non-convex robust optimization problems.
Journal of Mechanical Design
2021
Trisha Mittal, Aniket Bera, Dinesh Manocha
A learning model for multimodal context-aware emotion recognition that combines multiple human co-occurring modalities(such as facial, audio, textual, and pose/gaits) and two interpretations of context.
IEEE Multimedia
Anton Ratnarajah, Zhenyu Tang, Dinesh Manocha
A method for improving the quality of synthetic room impulse responses for far-field speech recognition. The authors bridge the gap between the fidelity of synthetic room impulse responses (RIRs) and real room impulse responses using a novel, TS-RIRGAN architecture.
arXiv.org
Trisha Mittal, Puneet Mathur, Aniket Bera, Dinesh Manocha
Affect2MM is a learning method for time-series emotion prediction for multimedia content. Its goal is to automatically capture varying emotions depicted by characters in real-life human-centric situations and behaviors. This method uses ideas from emotion causation theories to computationally model and determine the emotional state evoked in movie clips.
arXiv.org
Amanuel Awoke, Hugo Burbelo, Elizabeth Childs, Ferzam Mohammad, Logan Stevens, Nicholas Rewkowski, Dinesh Manocha
Distance learning presents a number of challenges. The authors identify four: the lack of social interaction, reduced student engagement and focus, reduced comprehension and information retention, and the lack of flexible and customizable instructor resources. They then examine how AR/VR technologies might address each challenge, and outline the further research that is required to fully understand the potential.
arXiv.org
Uttaran Bhattacharya, Nicholas Rewkowski, Abhishek Banerjee, Pooja Guhan, Aniket Bera, Dinesh Manocha
Text2Gestures is a transformer-based learning method to interactively generate emotive full-body gestures for virtual agents aligned with natural language text inputs. This method generates emotionally expressive gestures by utilizing relevant biomechanical features for body expressions, also known as affective features.
arXiv.org
Nannan Wu, Qianwen Chao, Yanzhen Chen, Weiwei Xu, Chen Liu, Dinesh Manocha, Wenxin Sun, Yi Han, Xinran Yao, Xiaogang Jin
A real-time cloth animation method for dressing virtual humans of various shapes and poses. The approach formulates clothing deformation as a high-dimensional function of body shape parameters and pose parameters.
arXiv.org
2020
Feixiang Lu, Zongdai Liu, Hui Miao, Peng Wang, Liangjun Zhang, Ruigang Yang, Dinesh Manocha, Bin Zhou
Holistically understanding an object and its 3D movable parts through visual perception models is essential for enabling an autonomous agent to interact with the world. For autonomous driving, the dynamics and states of vehicle parts such as doors, the trunk, and the bonnet can provide meaningful semantic information and interaction states, which are essential to ensure the safety of the self-driving vehicle. Existing visual perception models mainly focus on coarse parsing such as object bounding box detection or pose estimation and rarely tackle these situations. In this paper, the authors address this important problem for autonomous driving by solving two critical issues using visual data augmentation.
arXiv.org
Sheng Li, Xiang Gu, Kangrui Yi, Yanlin Yang, Guoping Wang, Dinesh Manocha
This experiment investigated the occurrence of self-illusion and its contribution to realistic behavior consistent with a virtual role in virtual environments.
IEEE Transactions on Visualization and Computer Graphics
Yuexin Ma, Xinge Zhu, Xinjing Cheng, Ruigang Yang, Jiming Liu, Dinesh Manocha
A label-free algorithm for trajectory extraction and prediction to use raw videos directly. To better capture the moving objects in videos, the authors introduce dynamic points to model dynamic motions by using a forward-backward extractor to keep temporal consistency and using image reconstruction to keep spatial consistency in an unsupervised manner. The method is the first to achieve unsupervised learning of trajectory extraction and prediction.
2020 European Conference on Computer Vision
Zehui Lin, Sheng Li, Xinlu Zeng, Congyi Zhang, Jinzhu Jia, Guoping Wang, Dinesh Manocha
This chi-squared progressive photon mapping algorithm (CPPM) constructs an estimator by controlling the bandwidth to obtain superior image quality.
ACM Transactions on Graphics
Shiguang Liu, Dinesh Manocha
This is a broad overview of research on sound simulation in virtual reality, games, etc. It first surveys various sound synthesis methods,including harmonic synthesis, texture synthesis, spectral analysis, and physics-based synthesis. Then, it summarizes popular sound propagation techniques, namely wave-based methods, geometric-based methods, and hybrid methods. Next, sound rendering methods are reviewed. The authors also highlight some recent methods that use machine learning techniques for synthesis, propagation, and some inverse problems.
arXiv.org
Pooja Guhan, Manas Agarwal, Naman Awasthi, Gloria Reeves, Dinesh Manocha, Aniket Bera
ABC-Net is a semi-supervised multi-modal GAN framework based on psychology literature that detects engagement levels in video conversations. It uses three constructs—behavioral, cognitive, and affective engagement—to extract various features that can effectively capture engagement levels.
arXiv.org
Uttaran Bhattacharya, Nicholas Rewkowski, Pooja Guhan, Niall L. Williams, Trisha Mittal, Aniket Bera, Dinesh Manocha
This autoregression network generates virtual agents that convey various emotions through their walking styles or gaits.
arXiv.org
Jaehoon Choi, Dongki Jung, Yonghan Lee, Deokhwa Kim, Dinesh Manocha, Donghwan Lee
An algorithm for self-supervised monocular depth completion in robotic navigation, computer vision and autonomous driving. The approach is based on training a neural network that requires only sparse depth measurements and corresponding monocular video sequences without dense depth labels. Our self-supervised algorithm is designed for challenging indoor environments with textureless regions, glossy and transparent surface, non-Lambertian surfaces, moving people, longer and diverse depth ranges and scenes captured by complex ego-motions.
arXiv.org
Qingyang Tan, Zherong Pan, Dinesh Manocha
LCollision is a learning-based method that synthesizes collision-free 3D human poses. LCollision is the first approach that can obtain high accuracy in handling non-penetration and collision constraints in a learning framework.
arXiv.org
Rohan Chandra, Aniket Bera, Dinesh Manocha
Autonomous vehicles behave conservatively in a traffic environment with human drivers and do not adapt to local conditions and socio-cultural norms. However, socially aware AVs can be designed if there exists a mechanism to understand the behaviors of human drivers. In this example of Machine Theory of Mind (M-ToM) the authors infer the behaviors of human drivers by observing the trajectory of their vehicles. "StylePredict" is based on trajectory analysis of vehicles. It mimics human ToM to infer driver behaviors, or styles, using a computational mapping between the extracted trajectory of avehicle in traffic and the driver behaviors using graph-theoretic techniques, including spectral analysis and centrality functions. StylePredict can analyze driver behavior in the USA, China, India, and Singapore, based on traffic density, hetero-geneity, and conformity to traffic rules.
arXiv.org
Angelos Mavrogiannis, Rohan Chandra, Dinesh Manocha
A learning algorithm for action prediction and local navigation for autonomous driving that classifies the driver behavior of other vehicles or road-agents (aggressive or conservative) and takes that into account for decision making and safe driving.
arXiv.org
Divya Kothandaraman, Rohan Chandra, Dinesh Manocha
An unsupervised multi-source domain adaptive semantic segmentation approach for autonomous vehicles in unstructured and unconstrained traffic environments.
arXiv.org
Mingliang Xu, Chaochao Li, Pei Lv, Wei Chen, Zhigang Deng, Bing Zhou, Dinesh Manocha
CubeP is a model for crowd simulation that comprehensively considers physiological, psychological, and physical factors. Inspired by the theory of “the devoted actor”, the model determines the movement of each individual by modeling the physical influence from physical strength and emotion. This is the first time that physiological, psychological, and physical factors are integrated in a unified manner, and the relationship between the factors is explicitly determined. The new model is capable of generating effects similar to real-world scenarios and can also reliably predict the changes in the physical strength and emotion of individuals in an emergency situation.
arXiv.org
Xutong Jin, Sheng Li, Tianshu Qu, Dinesh Manocha, Guoping Wang
Model sound synthesis is a physically-based sound synthesis method used to generate audio content in games and virtual worlds. This paper presents a novel learning-based impact sound synthesis algorithm called Deep-Modal. The approach can handle sound synthesis for common arbitrary objects, especially dynamic generated objects, in real time.
MM '20: Proceedings of the 28th ACM International Conference on Multimedia
Zhenyu Tang, Hsien-Yu Meng, Dinesh Manocha
A novel hybrid sound propagation algorithm for interactive applications.
arXiv.org
Sarala Padi, Dinesh Manocha, Ram Sriram
A novel, Multi-Window Data Augmentation(MWA-SER) approach for speech emotion recognition.MWA-SER is a unimodal approach that focuses on two key concepts; designing the speech augmentation method to generate additional data samples and building the deep learning models to recognize the underlying emotion of an audio signal.
arXiv.org
Anton Ratnarajah, Zhenyu Tang, Dinesh Manocha
The paper presents a Generative Adversarial Network (GAN) based room impulse response generator for generating realistic synthetic room impulse responses.
arXiv.org
Cheng Li, Min Tang, Ruofeng tong, Ming Cai, Jieyi Zhao, Dinesh Manocha
Cloth simulation is an active area of research in computer graphics, computer-aided design (CAD) and the fashion industry. Over the last few decades many methods have been proposed for solving the underlying dynamical system with robust collision handling. The paper presents a novel parallel algorithm for cloth simulation that exploits multiple GPUs for fast computation and the handling of very high resolution meshes. It is the first approach that can perform almost interactive complex cloth simulation with wrinkles, friction and folds on commodity workstations.
arXiv.org
Feixiang Lu, Zongdai Liu, Xibin Song, Dingfu Zhou, Wei Li, Hui Miao, Miao Liao, Liangjun Zhang, BinZhou, Ruigang Yang, Dinesh Manocha
The paper presents a robust and effective approach to reconstruct complete 3D poses and shapes of vehicles from a single image. It introduces a novel part-level representation for vehicle segmentation and 3D reconstruction, which significantly improves performance.
arXiv.org
Andrew Best, Sahil Narang, Dinesh Manocha
Sense-Plan-act (SPA) is a new approach for generating plausible verbal interactions between virtual human-like agents and user avatars in shared virtual environments. It extends prior work in propositional planning and natural language processing to enable agents to plan with uncertain information, and leverage question and answer dialogue with other agents and avatars to obtain the needed information and complete their goals. The agents are additionally able to respond to questions from the avatars and other agents using natural-language enabling real-time multi-agent multi-avatar communication environments.
arXiv.org
Rohan Chandra, Uttaran Bhattacharya, Tanmay Randhavane, Aniket Bera, Dinesh Manocha
RoadTrack is a realtime tracking algorithm for autonomous driving that tracks heterogeneous road-agents in dense traffic videos. The approach is designed for dense traffic scenarios that consist of different road-agents such as pedestrians, two-wheelers, cars, buses, etc. sharing the road.
GAMMA website
Zhiming Hu, Sheng Li, Congyi Zhang, Kangrui Yi, Guoping Wang, Dinesh Manocha
DGaze is a CNN-based model that combines object position sequence, head velocity sequence, and saliency features to predict users' gaze positions in HMD-based applications. The model can be applied to predict not only real-time gaze positions but also gaze positions in the near future and can achieve better performance than prior method.
IEEE Transactions on Visualization and Computer Graphics
Srihari Pratapa, Dinesh Manocha
RANDM is a random-access depth map compression algorithm for interactive rendering. The compressed representation provides random access to the depth values and enables real-time parallel decompression on commodity hardware. This method partitions the depth range captured in a given scene into equal-sized intervals and uses this partition to generate three separate components that exhibit higher coherence. Each of these components is processed independently to generate the compressed stream.
GAMMA website
Rohan Chandra, Uttaran Bhattacharya, Trisha Mittal, Aniket Bera, Dinesh Manocha
CMetric classifies driver behaviors using centrality functions. The formulation combines concepts from computational graph theory and social traffic psychology to quantify and classify the behavior of human drivers. CMetric is used to compute the probability of a vehicle executing a driving style, as well as the intensity used to execute the style. This approach is designed for real-time autonomous driving applications, where the trajectory of each vehicle or road-agent is extracted from a video.
arXiv.org
Trisha Mittal, Uttaran Bhattacharya, Rohan Chandra, Aniket Bera, Dinesh Manocha
The paper presents a learning-based method for detecting fake videos. The authors use the similarity between audio-visual modalities and the similarity between the affective cues of the two modalities to infer whether a video is “real” or “fake.”
arXiv.org
Trisha Mittal, Pooja Guhan, Uttaran Bhattacharya, Rohan Chandra, Aniket Bera, Dinesh Manocha
EmotiCon is a learning-based algorithm for context-aware perceived human emotion recognition from videos and images. It uses multiple modalities of faces and gaits, background visual information and socio-dynamic inter-agent interactions to infer the perceived emotion. EmotiCon outperforms prior context-aware emotion recognition methods.
arXiv.org
Abhishek Kumar, Trisha Mittal, Dinesh Manocha
MCQA is a learning-based algorithm for multimodal question answering that explicitly fuses and aligns the multi-modal input (i.e. text, audio, and video) forming the context for the query (question and answer).
arXiv.org
Zhenyu Tang, Dinesh Manocha
Modern computer graphics applications including virtual reality and augmented reality have adopted techniques for both visual rendering and audio rendering. While visual rendering can already synthesize virtual objects into the real world seamlessly, it remains difficult to correctly blend virtual sound with real-world sound using state-of-the-art audio rendering. When the virtual sound is generated unaware of the scene, the corresponding application becomes less immersive, especially for AR. The authors present their current work on generating scene-aware sound using ray-tracing based simulation combined with deep learning and optimization.
2020 IEEE Conference on Virtual Reality and 3D User Interfaces Abstracts and Workshops
Micah Taylor, Anish Chandak, Lakulish Antani, Dinesh Manocha
An algorithm and system for sound propagation and rendering in virtual environments and media applications. The approach uses geometric propagation techniques for fast computation of propagation paths from a source to a listener and takes into account specular reflections, diffuse reflections, and edge diffraction.
Intel
SriSai Naga Jyotish Poonganam, Bharath Gopalakrishnan, Venkata Seetharama Sai Bhargav Kumar Avula, K. Madhava Krishna, Arun Kumar Singh, Dinesh Manocha
A new model predictive control framework that improves reactive navigation for autonomous robots. The framework allows roboticists to compute low cost control inputs while ensuring some upper bound on the risk of collision.
IEEE Robotics and Automation Letters
Dinesh Manocha, Rohan Chandra, Uttaran Bhattacharya, Aniket Bera, Tanmay Randhavane
The authors' RoadTrack algorithm could help autonomous vehicles navigate dense traffic scenarios. The algorithm uses tracking-by-detection approach to detect vehicles and pedestrians, then predict where they are going.
IROS 2019
2019
Kurt Gray, Tanmay Randhavane, Kyra Kapsaskis, Uttaran Bhattacharya, Aniket Bera, Dinesh Manocha
A data-driven deep neural algorithm for detecting deceptive walking behavior using nonverbal cues like gaits and gestures.
arXiv.org
Rohan Chandra, Tianrui Guan, Srujan Panuganti, Trisha Mittal, Uttaran Bhattacharya, Aniket Bera, Dinesh Manocha
A novel approach for traffic forecasting in urban traffic scenarios using a combination of spectral graph analysis and deep learning.
arxiv.org
Qiaoyun Wu, Dinesh Manocha, Jun Wang, Kai Xu
The authors improve the cross-target and cross-scene generalization of visual navigation through a learning agent guided by conceiving the next observations it expects to see. A variational Bayesian model, NeoNav, generates the next expected observations (NEO) conditioned on the current observations of the agent and the target view.
PDF
Uttaran Bhattacharya, Christian Roncal, Trisha Mittal, Rohan Chandra,Aniket Bera, Dinesh Manocha
The paper presents an autoencoder-based semi-supervised approach to classify perceived human emotions from walking styles obtained from videos or from motion-captured data and represented as sequences of 3D poses.
arxiv.org
Chaochao Li, Pei Lv, Mingliang Xu, Xinyu Wang, Dinesh Manocha, Bing Zhou, Meng Wang
In many applications such as human-robot interaction, autonomous driving or surveillance, it is important to accurately predict pedestrian trajectories for collision-free navigation or abnormal behavior detection. The authors present a novel trajectory prediction algorithm for pedestrians based on a personality-aware probabilistic feature map.
arxiv.org
Uttaran Bhattacharya, Trisha Mittal, Rohan Chandra, Tanmay Randhavane (UNC), Aniket Bera, and Dinesh Manocha
STEP is a novel classifier network able to classify perceived human emotion from gaits, based on a Spatial Temporal Graph Convolutional Network architecture. Given an RGB video of an individual walking, STEP implicitly exploits the gait features to classify the emotional state of the human into one of four emotions: happy, sad, angry, or neutral. | Watch a video about STEP |
arxiv.org
Rohan Chandra, Uttaran Bhattacharya, Trisha Mittal, Xiaoyu Li, Aniket Bera, Dinesh Manocha
The GraphRQI algorithm identifies driver behaviors from road agent trajectories. It is 25 percent more accurate over prior behavior classification algorithms for autonomous vehicles. | Watch a video about GraphRQI |
arxiv.org
Qingyang Tan, Zherong Pan, Lin Gao, and Dinesh Manocha
A new method bridges the gap between mesh embedding and physical simulation for efficient dynamic models of clothes. The key technique is a graph-based convolutional neural network (CNN) defined on meshes with arbitrary topologies, and a new mesh embedding approach based on physics-inspired loss term. After training, the learned simulator runs10–100 times faster and the accuracy is high enough for robot manipulation tasks. | Watch a video about this method |
arxiv.org
2020
Gregory Jansen, Aaron Coburn, Adam Soroka, Richard Marciano
Describes the development and testing of the next-generation Trellis Linked Data Platform with Memento versioning support.
dcicblog.umd.edu
2019
William Underwood and Richard Marciano
This paper explores whether the computational thinking practices of mathematicians and scientists in the physical and biological sciences are also the practices of archival scientists. It is argued that these practices are essential elements of an archival science education in preparing students for a professional archival career.
Marciano and 20 students in the Digital Curation Innovation Center developed a reframing model for digital curation through computational thinking. Their case study involves adding metadata to non-digital primary records from the WWII TuleLake Japanese American Internment Camp. Their curation methods led to the discovery of new narratives and connections from this data.
2020
Murat Arcak, Nuno Martins
Presents dissipativity tools to establish global asymptotic stability of the set of Nash equilibria in a deterministic model of population games.
arXiv.org
2021
Ruoxi Li, Sunandita Patra, Dana Nau
The authors describe Dec-RPAE, a system for decentralized multi-agent acting and planning in partially observable and non-deterministic environments. The system includes both an acting component and an online planning component.
Proceedings of the Thirty-First International Conference on Automated Planning and Scheduling (ICAPS 2021)
Sunandita Patra, James Mason, Malik Ghallab, Dana Nau, Paolo Traverso
The authors define and implement an integrated acting-and-planning system in which both planning and acting use the same operational models.
Preprint submitted to Artificial Intelligence
Vincent Hsiao, Xinyue Pan, Dana Nau, Rina Dechter
The authors define a framework for modeling spatial evolutionary games using Dynamic Bayesian Networks that capture the underlying stochastic process. The resulting Dynamic Bayesian Networks can be queried for quantities of interest by performing exact inference on the network. They then propose a method for producing approximations of the spatial evolutionary game through the truncation of the corresponding DBN, taking advantage of the high symmetry of the model.
Proceedings of the ACM 20th International Conference on Autonomous Agents and MultiAgent Systems
Michele Gelfand, Joshua Jackson, Xinyue Pan, Dana Nau, Dylan Pieper, Emmy Denison, Munqith Dagher, Paul Van Lange, Chi-Yue Chiu, Mo Wang
The COVID-19 pandemic is a global health crisis, yet certain countries have had far more success in limiting COVID-19 cases and deaths. The authors suggest that collective threats require a tremendous amount of coordination, and that strict adherence to social norms is a key mechanism that enables groups to do so. The paper examines how the strength of social norms—or cultural tightness–looseness—was associated with countries' success in limiting cases and deaths. The results indicated that, compared with nations with high levels of cultural tightness, nations with high levels of cultural looseness are estimated to have had 4·99 times the number of cases (7132 per million vs 1428 per million, respectively) and 8·71 times the number of deaths (183 per million vs 21 per million, respectively), taking into account a number of controls. A formal evolutionary game theoretic model suggested that tight groups coordinate much faster and have higher survival rates than loose groups. The results suggest that tightening social norms might confer an evolutionary advantage in times of collective threat.
The Lancet Planetary Health
2020
Ruoxi Li, Sunandita Patra,Dana Nau
The paper describes Dec-RAE-UPOM, a system for decentralized multi-agent acting and planning in environments that are partially observable, nondeterministic, and dynamically changing.
Dr. Nau's Computer Science paper archives
Sunandita Patra, Amit Kumar, James Mason, Malik Ghallab, Paolo Traverso, Dana Nau
New planning and learning algorithms for Refinement Acting Engine (RAE), which uses hierarchical operational models to perform tasks in dynamically changing environments.
2020 International Conference on Automated Planning and Scheduling (ICAPS)
2019
Sudanita Patra, Malik Ghallab, Dana Nau, Paolo Traverso
An integrated acting and planning system that addresses the consistency problem by using the actor’s operational models both for acting and for planning.
2020
Rohan Mekala, Adam Porter, Mikael Lindvall
The authors build a black box attack against robust multi-model face recognition pipelines and test it against Google’s FaceNet. They present a novel metamorphic defense pipeline relying on nonlinear image transformations to detect adversarial attacks with a high degree of accuracy. They further use the results to create probabilistic metamorphic relations that define efficient decision boundaries between safe and adversarial examples.
ICSEW'20 May 2020, Seoul, South Korea
2020
Ye Wang, Jian Dong, Yanxin Liu, Chunpei Wang, Gang Qu
A report on ongoing work towards a machine learning based runtime approximate computing (AC) approach that can be applied on the data flow graph representation of any software program. This approach can utilize runtime inputs together with prior information of the software to identify and approximate the noncritical portion of a computation with low runtime overhead. Some preliminary experimental results show that compared with previous runtime AC approaches, our approach can significantly reduce the time overhead with little loss on the energy efficiency and computation accuracy.
2020 International Conference on Embedded Software (EMSOFT)
Zhichao Xu, Aijiao Cui, Gang Qu
The electronics industry has become the main target of counterfeiting. Integrated circuits (ICs) are highly vulnerable to various types of counterfeiting such as recycling. The recycled ICs do not have the performance and service lifetime of the genuine ones, which poses a threat to reliability of electronic systems. This paper proposes a novel recycled IC detection method. An authentication mechanism and a parallel circuit unit structures, as an aging sensor, are used to distinguish recycled ICs from fresh ICs.
GLSVLSI '20: Proceedings of the 2020 on Great Lakes Symposium on VLSI
Ye Wang, Jian Dong, Qian Xu, Zhaojun Lu, Gang Qu
Approximate computing (AC) is an attractive energy efficient technique that can be implemented at almost all the design levels including data, algorithm, and hardware. The basic idea behind AC is to deliberately control the trade-off between computation accuracy and energy efficiency. However, with the introduction of AC, traditional computing frameworks are having many potential security vulnerabilities. This paper analyzes these vulnerabilities and the associated attacks as well as corresponding countermeasures.
GLSVLSI '20: Proceedings of the 2020 on Great Lakes Symposium on VLSI
Jiliang Zhang, Chen Li, Jing Ye, Gang Qu
This article reviews recent research progress on machine learning privacy. First, the privacy threats on data and models in different scenarios are described in detail. Then, typical privacy protection methods are introduced. Finally, the limitations and future development trends of ML privacy research are discussed.
GLSVLSI '20: Proceedings of the 2020 on Great Lakes Symposium on VLSI
2019
Jiqing Xu, Zhengjie Li , Yunbing Pang , Jian Wang , Gang Qu, Jinmei Lai
Under the premise of selecting a large number of typical benchmark circuits, a representative path delay can well represent the overall timing performance of FPGAs.
2019 IEEE 13th International Conference on ASIC (ASICON)
2021
Dakuo Wang, Pattie Maes, Xiangshi Ren, Ben Shneiderman, Yuanchun Shi, Qianying Wang
Artificial Intelligence (AI) can refer to the machine learning algorithms and the automation applications built on top of these algorithms. Human-computer interaction (HCI) researchers have studied these AI applications and suggested various Human-Centered AI (HCAI) principles for an explainable, safe, reliable, and trustworthy interaction experience. While some designers believe that computers should be supertools and active appliances, others believe that these latest AI systems can be collaborators. We ask whether the supertool or the collaboration metaphors best support work and play? How can we design AI systems to work best with people or for people? What does it take to get there?
2021 ACM CHI Conference on Human Factors in Computing Systems
Ben Shneiderman
Shneiderman's tutorial proposes a new synthesis, in which Artificial Intelligence (AI) algorithms are combined with human-centered thinking to make Human-Centered AI (HCAI). This approach combines research on AI algorithms with user experience design methods to shape technologies that amplify, augment, empower, and enhance human performance. Researchers and developers for HCAI systems value meaningful human control, putting people first by serving human needs, values, and goals.
26th ACM International Conference on Intelligent User Interfaces
Ben Shneiderman
This is a 2006 draft position paper for the emerging science of the web. Readers will gain hope for the future by reading how government services and digital libraries are being redesigned to make them more usable for diverse users. There is a good taste of the breadth of research being done: not only for the diversity of users and their special needs, but for the research methods and outcomes. The breadth of these implications highlights why universal usability research is so important. There is progress and hope, but there are many minds to be changed and much work to be done.
docsbay.net
2020
Ben Shneiderman
This paper bridges the gap between widely discussed ethical principles of Human-centered AI(HCAI) and practical steps for effective governance.
ACM Transactions on Interactive Intelligent Systems
Ben Shneiderman
A commentary that reverses the current emphasis on algorithms and AI methods, by putting humans at the center of systems design thinking. It offers three ideas: (1) a two-dimensional HCAI framework, which shows how it is possible to have both high levels of human control AND high levels of automation, (2) a shift from emulating humans to empowering people with a plea to shift language, imagery, and metaphors away from portrayals of intelligent autonomous teammates towards descriptions of powerful tool-like appliances and tele-operated devices, and (3) a three-level governance structure that describes how software engineering teams can develop more reliable systems, how managers can emphasize a safety culture across an organization, and how industry-wide certification can promote trustworthy HCAI systems.
AIS Transactions on Human-Computer Interaction
Ben Shneiderman
Proposes a two-dimensional framework alternative to autonomous AI systems called Human-Centered Artificial Intelligence that clarifies how to design for high levels of human control and high levels of computer automation to increase human performance, understand the situations in which full human control or full computer control are necessary, and avoid the dangers of either excessive human control or excessive computer control.
ACM International Journal of Human-Computer Interaction
2020
Emre Ozfatura, Sennur Ulukus, Deniz Gunduz
Introduces a novel coded matrix-vector multiplication scheme, called coded computation with partial recovery (CCPR), which benefits from the advantages of both coded and uncoded computation schemes, and reduces both computation time and decoding complexity by allowing a trade-off between the accuracy and the speed of computation. The approach is extended to distributed implementation of more general computation tasks by proposing a coded communication scheme with partial recovery, where the results of subtasks computed by the workers are coded before being communicated.
2019 IEEE International Conference on Acoustics, Speech and Signal Processin; arXiv.org
Deniz Gunduz, Emre Ozfatura, Sennur Ulukus, Baturalp Buyukates
The age of information (AoI) metric is used to track the recovery frequency of partial computations in distributed gradient descent, the most common approach in supervised machine learning, a new solution to the problem of “straggling” worker machines.
arXiv.org
Brian Kim, Yalin E. Sagduyu, Kemal Davaslioglu, Tugba Erpek, Sennur Ulukus
Presents over-the-air adversarial attacks against deep learning-based modulation classifiers, accounting for realistic channel and broadcast transmission effects. A certified defense method using randomized smoothing is also included.
arXiv.org
