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IEEE International Symposium on Biomedical Imaging

作者： Xin Yang Dong Ni Jing Qin Shengli Li Tianfu Wang Siping Chen Pheng Ann Heng National-Regional Key Technology Engineering Laboratory for Medical Ultrasound Shenzhen University P. R. China Center for Human Computer Interaction Shenzhen Institute of Advanced Integration Technology P.R. China Department of Ultrasound Nanfang Medical University P. R. China Department of Computer Science and Engineering The Chinese University of Hong Kong Hong Kong P. R. China

The acquisition of standard planes is crucial for medical ultrasound (US) diagnosis. In this paper, we present a hierarchical supervised learning framework for automatically detecting standard plane in consecutive 2D US images. The technique is demonstrated by developing a system that localizes fetal abdominal standard plane (FASP) from US videos. We first propose a novel radial component-based model (RCM) to describe the geometric constrains of key anatomical structures (KAS). In order to enhance the detection accuracy, we further adopt random forests classifier for detection of KAS within the regions constrained by RCM. Finally, a second-level classifier combines the results of component detectors to identify a US image as a “FASP” or a “nonFASP”. Experimental results show that our method significantly outperforms both the full abdomen and the separate anatomy detection methods without geometric constrains.

关键词： Radio frequency Standards Videos Ultrasonic imaging Detectors Anatomical structure

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human-Machine interaction in Automated Vehicle: The ABV Project

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IFAC Proceedings Volumes 2014年第3期47卷 6344-6349页

作者： Chouki Sentouh Jean-Christophe Popieul Serge Debernard Serge Boverie Laboratory of Industrial and Human Automation Mechanics and Computer Science LAMIH - CNRS UMR 8201 University of Valenciennes Mont Houy- F-59313 Valenciennes France Continental Automotive SAS France Department of Advanced Development for Safety Applications Toulouse France

The work described in this paper is part of a research program named ABV (Low Speed Automation) where the goal is the automation of road vehicle at low speed while ensuring the sharing of driving between the driver and the assistance. This paper focuses on the problem of human-machine cooperation in the specific context of vehicle driving, with a view of shared control between driver and automation, considering the acceptability of the system and the driver distractions and drowsiness.

关键词： Shared control human-machine cooperation active safety driver-vehicle interaction lane keeping assist system

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Uncovering information needs for independent spatial learning for users who are visually impaired 13

Uncovering information needs for independent spatial learnin...

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15th International ACM SIGACCESS Conference on computers and Accessibility, ASSETS 2013

作者： Banovic, Nikola Franz, Rachel L. Truong, Khai N. Mankoff, Jennifer Dey, Anind K. Human-Computer Interaction Institute Carnegie Mellon University Pittsburgh PA United States Department of Computer Science University of Toronto Toronto ON Canada

ISBN: (纸本)9781450324052

Sighted individuals often develop significant knowledge about their environment through what they can visually observe. In contrast, individuals who are visually impaired mostly acquire such knowledge about their environment through information that is explicitly related to them. This paper examines the practices that visually impaired individuals use to learn about their environments and the associated challenges. In the first of our two studies, we uncover four types of information needed to master and navigate the environment. We detail how individuals' context impacts their ability to learn this information, and outline requirements for independent spatial learning. In a second study, we explore how individuals learn about places and activities in their environment. Our findings show that users not only learn information to satisfy their immediate needs, but also to enable future opportunities - something existing technologies do not fully support. From these findings, we discuss future research and design opportunities to assist the visually impaired in independent spatial learning.

关键词： Assistive technology

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Game-based learning system using graduated-interval recall method

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International Conference on IT Convergence and Security, ICITCS 2012

作者： Jin, Ming Kim, Yoon Sang Human Interaction Lab. Department of Computer Science and Engineering Korea Tech. Cheonan Korea Republic of

ISBN: (纸本)9789400758599

Currently, research is actively being conducted on applying games to education. However, existing game-based learning systems mainly focus on how to increase learning motivation and enhance engagement, while achieving less success on how to make further improvements on the effectiveness of learning. To improve on these points, this paper proposes a game-based learning system using graduated-interval recall method to organize game contents and learning courses with appropriate review intervals according to learners' status. The proposed system has been verified through comparative learning effectiveness tests between two learning groups, in which one group engaged in learning with the proposed system and the other with an existing system. © 2013 Springer science+Business Media.

关键词： Learning systems

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Emotion analysis of children's stories with context information

Emotion analysis of children's stories with context informat...

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Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA)

作者： Zhengchen Zhang Minghui Dong Shuzhi Sam Ge Human Language Technology Department Institute for Infocomm Research (I2R) A *STAR Singapore Robotics Institute University of Electronic Science and Technology of China Chengdu China Department of Electrical and Computer Engineering and Social Robotics Laboratory National University of Singapore Singapore

ISBN: (纸本)9781479942503

In this paper, we analyse the emotion of children's stories in sentence level by considering the context information. We demonstrate that the emotion of a sentence is not only dependent on its content, but also affected by its neighbours in a story. A Hidden Markov Model (HMM) based method is proposed to model the emotion sequence and to detect whether a sentence is neutral or not. We show the important features for emotion detection by studying a children's story corpus. An empirical evaluation is conducted to investigate the efficiency of the model. The results demonstrate that the proposed method can achieve competitive performance with the state-of-the-art methods, and it is affected more slightly by the training set than traditional classification methods. Classifier fusion is applied to combine different methods to achieve better results.

关键词： Hidden Markov models Training Accuracy Support vector machines Testing Feature extraction Context

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Impact of prior knowledge and teaching strategies on learning by teaching 16

Impact of prior knowledge and teaching strategies on learnin...

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Workshops at the 16th International Conference on Artificial Intelligence in Education, AIED 2013

作者： Rodrigo, Ma. Mercedes T. Ong, Aaron Bringula, Rex Basa, Roselle S. Dela Cruz, Cecilo Matsuda, Noboru Ateneo Laboratory for the Learning Sciences Department of Information Systems and Computer Science Ateneo de Manila University Quezon City Philippines University of the East Manila Philippines Human-Computer Interaction Institute Carnegie Mellon University PittsburghPA United States

We investigate cognitive factors that are predictive of learning gains when students learn to solve equations by teaching a synthetic peer, called SimStudent. Previous empirical studies showed that prior knowledge is strongly predictive of post-test scores. However, in a recent study in the Philippines that replicated our previous study in the USA, there were students with low priorknowledge who tutored their SimStudent better than other equally low prior students. In this paper, we analyze both process data (tutoring interactions) and outcome data (test scores) to understand what makes learning by teaching more effective. The results imply a presence of individual behavioral differences beyond the difference in the prior knowledge that might have affected SimStudent's learning, which in turn had non-trivial influence on tutor learning.

关键词： Students

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Developing ISO 9241-151 product certification process: Challenges

Developing ISO 9241-151 product certification process: Chall...

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2nd International Conference on Design, User Experience, and Usability: Web, Mobile, and Product Design, DUXU 2013, Held as Part of 15th International Conference on human-computer interaction, HCI International 2013

作者： Çaǧiltay, Kürşat Alacam, Ozge Ocak, Nihan Erdal, Feride Department of Computer Education and Instructional Technology Middle East Technical University Turkey Department of Informatics University of Hamburg 22527 Hamburg Germany Human Computer Interaction Research and Application Laboratory Middle East Technical University Turkey

ISBN: (纸本)9783642392528

ISO 9241 Ergonomics of human-System interaction Standard, which is also called as Ergonomic requirements for office work with visual display terminals, is a standard containing many parts about ergonomics of human computer interaction. In this paper, we aim to elaborate the challenges evoked during ISO 9241-151 Product Certification Process handled at the Middle East Technical University (METU), human computer interaction Research and Application laboratory (METU-HCI-LAB), which is the first and only accredited laboratory of Turkish Standards Institute-TSE within the scope of "TS EN ISO/IEC 9241-151". © 2013 Springer-Verlag Berlin Heidelberg.

关键词： User interfaces

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Towards improving programming habits to create better computer science course outcomes 13

Towards improving programming habits to create better comput...

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18th ACM Conference on Innovation and Technology in computer science Education, ITiCSE 2013

作者： Spacco, Jaime Fossati, Davide Stamper, John Rivers, Kelly Computer Science Department Knox College Galesburg IL 61401 United States Computer Science Department Carnegie Mellon University in Qatar P.O. Box 24866 Doha Qatar Human-Computer Interaction Institute Carnegie Mellon University Pittsburgh PA 15213 United States

ISBN: (纸本)9781450320788

We examine a large dataset collected by the Marmoset system in a CS2 course. The dataset gives us a richly detailed portrait of student behavior because it combines automatically collected program snapshots with unit tests that can evaluate the correctness of all snapshots. We find that students who start earlier tend to earn better scores, which is consistent with the findings of other researchers. We also detail the overall work habits exhibited by students. Finally, we evaluate how students use release tokens, a novel mechanism that provides feedback to students without giving away the code for the test cases used for grading, and gives students an incentive to start coding earlier. We find that students seem to use their tokens quite effectively to acquire feedback and improve their project score, though we do not find much evidence suggesting that students start coding particularly early. Copyright 2013 ACM.

关键词： Students

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HiveMind: Tuning crowd response with a single value 1

HiveMind: Tuning crowd response with a single value

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1st AAAI Conference on human Computation and Crowdsourcing, HCOMP 2013

作者： Singh, Preetjot Lasecki, Walter S. Barelli, Paulo Bigham, Jeffrey P. EECS Department Northwestern University United States Computer Science University of Rochester United States Economics University of Rochester United States Human Computer Interaction Institute Carnegie Mellon University United States

ISBN: (纸本)9781577356318

One common problem plaguing crowdsourcing tasks is tuning the set of worker responses: Depending on task requirements, requesters may want a large set of rich and varied worker responses (typically in subjective evaluation tasks) or a more convergent response-set (typically for more objective tasks such as fact-checking). This problem is especially salient in tasks that combine workers' responses to present a single output: Divergence in these settings could either add richness and complexity to the unified answer, or noise. In this paper we present HiveMind, a system of methods that allow requesters to tune different levels of convergence in worker participation for different tasks simply by adjusting the value of one variable. Copyright © 2013, Association for the Advancement of Artificial Intelligence. All rights reserved.

关键词： Crowdsourcing

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Development and validation of a 3D kinematic-based method for determining gait events during overground walking

Development and validation of a 3D kinematic-based method fo...

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International Conference on 3D Imaging (IC3D)

作者： Mohamed Boutaayamou Cédric Schwartz Vincent Denoël Bénédicte Forthomme Jean-Louis Croisier Gaëtan Garraux Jacques G Verly Olivier Brüls Dept. of Electrical Engineering and Computer Science INTELSIG Laboratory ULg Liège Belgium Laboratory of Human Motion Analysis University of Liège (ULg). Liège Belgium Movere Group_Cyclotron Research Center ULg Liège Belgium Department of Neurology University Hospital Center Liège Belgium

A new signal processing algorithm is developed for quantifying heel strike (HS) and toe-off (TO) event times solely from measured heel and toe coordinates during overground walking. It is based on a rough estimation of relevant local 3D position signals. An original piecewise linear fitting method is applied to these local signals to accurately identify HS and TO times without the need of using arbitrary experimental coefficients. We validated the proposed method with nine healthy subjects and a total of 322 trials. The extracted temporal gait events were compared to reference data obtained from a force plate. HS and TO times were identified with a temporal accuracy ± precision of 0.3 ms ± 7.1 ms, and -2.8 ms ± 7.2 ms in comparison with reference data defined with a force threshold of 10 N. This algorithm improves the accuracy of the HS and TO detection. Furthermore, it can be used to perform stride-by-stride analysis during overground walking with only recorded heel and toe coordinates.

关键词： Force Legged locomotion Three-dimensional displays Signal processing algorithms Accuracy Fitting Force measurement

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