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Eric Wang

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Headings

<H1> <H2> <H3> <H4> <H5>
5 46 80 31 12
<H1> About me
<H1> projects
<H1> my skills
<H1> publications
<H1> awards
<H2> Education
<H2> Experience
<H2> Computer Vision
<H2> Virtual Reailty
<H2> Mixed method Research
<H2> CHI 2020 Again, Together: Socially Reliving Virtual Reality Experiences When Separated
<H2> IEEE VR 2020 ReliveReality: Enabling Socially Reliving Experiences in Virtual Reality via a Single RGB camera
<H2> IEEE VR 2019 RelivelnVR: Capturing and Reliving Virtual Reality Experiences Together
<H2> IEEE VR 2019 VR-Replay: Capturing and Replaying Avatars in VR for Asynchronous 3D Collaborative Design
<H2> IEEE HRI 2019 Drone.io: A Gestural and Visual Interface for Human-Drone Interaction
<H2> CHI 2018 RoMA: Interactive Fabrication with Augmented Reality and a Robotic 3D Printer
<H2> CHI 2017 Teaching Programming with Gamified Semantics
<H2> MobileHCI 2015 PalmType: Using Palms as Keyboards for Smart Glasses
<H2> MobileHCI 2015 PalmGesture: Using Palms as Gesture Interfaces for Eyes-free Input
<H2> CHI 2014 EverTutor: Automatically Creating Interactive Guided Tutorials on Smartphones by User Demonstration
<H2> MM 2013 RealSense: Directional Interaction for Proximate Mobile Sharing
<H2> EyeWrist: Enabling Gesture-Based Interaction on Palm with a Wrist-Worn Sensor
<H2> EyeWatch: Touch Interaction on Back of the Hand for Smart Watches
<H2> The Incredible Shrinking Adventure
<H2> Computer Science
<H2> Virtual Reality
<H2> Research Design
<H2> Again, Together: Socially Reliving Virtual Reality Experiences When Separated
<H2> Privacy-Preserving Relived Experiences in Virtual Reality
<H2> RelivelnVR: Capturing and Reliving VirtualReality Experiences Together
<H2> VR-Replay: Capturing andReplaying Avatars in VR for Asynchronous 3D Collaborative Design
<H2> Drone.io: A Gestural and Visual Interface for Human-DroneInteraction
<H2> RoMA: Interactive Fabrication with Augmented Reality and a Robotic 3D Printer
<H2> Teaching Programming with Gamified Semantics
<H2> PalmType: Using Palms as Keyboards for Smart Glasses
<H2> PalmGesture: Using Palms as Gesture Interfaces for Eyes-free Input
<H2> EverTutor: Automatically Creating Interactive Guided Tutorials on Smartphones by User Demonstration
<H2> RealSense: Directional Interaction for Proximate Mobile Sharing Using Built-in Orientation Sensors
<H2> RelivelnVR: Capturing and Reliving VirtualReality Experiences Together
<H2> EverTutor: Automatically Creating Interactive Guided Tutorials on Smartphones by User Demonstration
<H2> MagicWrist - Connect the world
<H2> The Incredible Shrinking Adventure
<H2> EyeWatch: Touch Interaction on Back of the Hand for Smart Watches
<H2> EyeWrist - Enabling Gesture-Based Interaction on Palm with a Wrist-Worn Sensor
<H2> RealSense: Directional Interaction for Proximate Mobile Sharing
<H2> EverTutor: Automatically Creating Interactive Guided Tutorials on Smartphones by User Demonstration
<H2> PalmType: Using Palms as Keyboards for Smart Glasses
<H2> EyeWrist: Enabling Gesture-Based Interaction on Palm with a Wrist-Worn Sensor
<H2> PalmGesture: Using Palms as Gesture Interfaces for Eyes-free Input
<H2> EyeWatch: Touch Interaction on Back of the Hand for Smart Watches
<H2> The Incredible Shrinking Adventure
<H3> I’m Eric Wang, a Ph.D. student in Information Science at Cornell University advised by Prof. Andrea Stevenson Won . Previously, I was a research intern at Stanford University, primarily working with Prof. James Landay . I have B.S and M.S. in Computer Science from National Taiwan University advised by Prof. Mike Y. Chen and Prof. Bing-Yu Chen .
<H3> My research interests lie at the intersection of Human-Computer Interaction (HCI) , Computer-Supported Cooperative Work (CSCW) , and Virtual/Mixed Reality (VR/MR) My current topic is focused on transforming the way people share knowledge and experiences beyond photo/video recordings. More specifically, I’m interested in (1) utilizing deep learning, computer vision and VR to enable sharing experiences through socially reliving experiences in VR ; (2) leveraging such novel time-machine-like VR reliving experience to support better remote collaboration and learning ; and (3) designing VR privacy-preserving mechanisms for sharing contents in VR without privacy concerns.
<H3> Ph.D. in Information Science, Cornell University
<H3> M.S. in Computer Science, National Taiwan University
<H3> B.S. in Computer Science, National Taiwan University
<H3> Research Assistant, VR as a Teaching Tool for Moon Phases and Beyond, Cornell University
<H3> Teaching Assistant, Introduction to Computing using Matlab, Cornell University
<H3> Research Assistant, Remote Touch for Telepresence Robots, Cornell University
<H3> Teaching Assistant, Crowdsourcing and Human Computation, Cornell University
<H3> Teaching Assistant, Introduction to Computing using Matlab, Cornell University
<H3> Teaching Assistant, Data Structures and Functional Programming, Cornell University
<H3> Research Intern, Human-Drone Interaction project, Stanford University
<H3> Chief Coordinator, 2015 CHI@NTU Workshop
<H3> Teaching Assistant, Mobile HCI , National Taiwan University
<H3> Transforming how people share knowledge and experiences
<H3> Accepted by CHI 2020
<H3> We describe ReliveInVR, a new time-machine-like VR experience sharing method. ReliveInVR allows multiple users to immerse themselves in the relived experience together and independently view the experience from any perspective. We conducted a 1x3 within-subject study with 26 dyads to compare ReliveInVR with (1) co-watching 360-degree videos on desktop, and (2) co-watching 360-degree videos in VR. Our results suggest that participants reported higher levels of immersion and social presence in ReliveInVR. Participants in ReliveInVR also understood the shared experience better, discovered unnoticed things together and found the sharing experience more fulfilling.
<H3> Under Review
<H3> We present a new experience sharing method, ReliveReality, which transforms traditional photo/video memories into 3D reconstructed memories and allows users to relive past experiences through VR socially. ReliveReality utilizes deep learning-based computer vision techniques to reconstruct people in clothing, estimate multi-person 3D pose and reconstruct 3D environments with only a single RGB camera. Integrating with a networked multi-user VR environment, ReliveReality enables people to ‘enter' into a past experience, move around and relive a memory from different perspectives in VR together. We discuss the technical implementation and implications of such techniques for privacy}
<H3> Published in IEEE VR 2019 (poster)
<H3> We present a new type of sharing VR experience over distance which allows people to relive their recorded experience in VR together. We describe a pilot study examining the user experience when people share their VR experience together remotely. Finally, we discuss the implications for sharing VR experiences over time and space.
<H3> Published in IEEE VR 2019 (poster)
<H3> Distributed teams rely on asynchronous CMC tools to complete collaborative tasks due to the difficulties and costs surrounding scheduling synchronous communications. In this paper, we present VR-Replay, a new communication tool that records and replays avatars with both nonverbal behavior and verbal communication in VR asynchronous collaboration.
<H3> Published in HRI 2019 (full paper)
<H3> We introduce drone.io, a projected body-centric graphical user interface for human-drone interaction. Using two simple gestures, users can interact with a drone in a natural manner. drone.io is the first human-drone graphical user interface embedded on a drone to provide both input and output capabilities. This paper describes the design process of drone.io. We report drone.io's evaluation in three user studies (N=27) and show that people were able to use the interface with little prior training.
<H3> Published in CHI 2018 (full paper)
<H3> We present the Robotic Modeling Assistant (RoMA), an interactive fabrication system providing a fast, precise, hands-on and in-situ modeling experience with an augmented reality CAD editor and a robotic arm 3D printer. With RoMA, users can integrate real-world constraints into a design rapidly, allowing them to create well-proportioned tangible artifacts. Users can even directly design on and around an existing object, and extending the artifact by in-situ fabrication.
<H3> Published in CHI 2017 (full paper)
<H3> We present Reduct, an educational game embodying a new, comprehension-first approach to teaching novices core programming concepts which include functions, Booleans, equality, conditionals, and mapping functions over sets. In this novel teaching strategy, the player executes code using reduction-based operational semantics. During gameplay, code representations fade from concrete, block-based graphics to the actual syntax of JavaScript ES2015. Our study result shows that novices demonstrated promising learning of core concepts expressed in actual JavaScript code in a short timeframe with our Reduct game.
<H3> Published in MobileHCI 2015 (full paper)
<H3> We present PalmType, which uses palms as interactive keyboards for smart wearable displays like Google Glass. PalmType leverages user's innate ability to pinpoint a specific area of palm and fingers without visual attention (i.e. proprioception) and provides visual feedback via wearable displays. With wrist-worn sensors and wearable displays, PalmType enables typing without requiring users to hold any devices and visual attention to their hands. We conducted design sessions with 6 participants to see how users map QWERTY layout to their hands based on their proprioception.
<H3> Published in MobileHCI 2015 (full paper)
<H3> With abundant tactile cues and proprioception on palms, the palm can be leveraged as an interface for eyes-free input which decreases visual attention to interfaces and minimizes cognitive/physical effort. We explored eyes-free gesture interactions on palms that enables users to interact with devices by drawing stroke gestures on palms without looking at palms. To understand user behavior when users draw gestures on palms and how gestures on palms are affected by palm characteristics, we conducted two 24-participant user studies. Also, we implemented EyeWrist that turns the palm into a gesture interface by embedding a micro-camera and an IR laser line generator on the wristband, and three interaction techniques that takes advantages of palm characteristics are proposed.
<H3> Published in CHI 2014 (full paper)
<H3> We present EverTutor that automatically generates interactive tutorials on smartphone from user demonstration. It simplifies the tutorial creation, provides tutorial users with contextual step-by-step guidance and avoids the frequent context switching between tutorials and users' primary tasks. In order to generate tutorials automatically, EverTutor records low-level touch events to detect gestures and identify on-screen targets. When a tutorial is browsed, the system uses vision-based techniques to locate the target regions and overlays the corresponding input prompt contextually. It also identifies the correctness of users' interaction to guide the users step by step.
<H3> Published in MM 2013 (short paper)
<H3> We present RealSense, a technology that enables users to easily share media files with proximate users by detecting the relative direction of each other only with built-in orientation sensors on smartphones. With premise that users are arranged as a circle and every user is facing the center of that circle, RealSense continuously collects the directional heading of each phone to calculate the virtual position of each user in real time during the sharing.
<H3> Excellent Work, The 8th Acer Long-Term Smile Innovation Contest, 2014
<H3> We present EyeWrist, which uses palms as the gesture interface for smart wearable displays such as Google Glass. With abundant tactile cues and proprioception on palms, EyeWrist can also be leveraged for device-less and eyes-free remote for smart TVs. EyeWrist embeds a micro-camera and an IR laser line generator on the wristband and use computer vision algorithms to calculate the finger’s position on the palm. Without requiring the line of sight of users’ fingertips on palms, the camera height could be lower, making the whole device more portable. We also implemented a gesture recognizer to distinguish different symbols, letters or touchscreen gestures(e.g. swipe, pinch) on palms. The recognition result would be sent to smart devices via Wi-Fi for gesture-based interaction.
<H3> 2nd Prize, MobileHero – user experience design competition, 2014
<H3> We present EyeWatch, which uses back of the hand as gesture interface for smart watches. EyeWatch not only overcomes the Big smartwatch problem: occlusion and fat finger problem, but also enables more powerful and natural interaction such as drawing a symbol quickly to open an application, or intuitively handwriting on back of hand to input message. Our proof-of-concept implementation consists of a micro-camera and an IR laser line generator on the smart watch, and computer vision algorithms are used to calculate the finger’s position on the back of hand.
<H3> Final Shortlist, ACM UIST 2014 Student Innovation Contest
<H3> Imagining you were shrunk, you can explore your big house, play with big pets and family. To fulfill the imagination and provide users with incredible shrinking adventures, we use a robotic car and a google cardboard which turns a smartphone into a VR headset. We build a robotic car and attach a smartphone on the pan/tilt servo bracket. stereo images are generated from smartphone’s camera and are streamed to the other smartphone inside of the google cardboard. When users see the world through the smartphone on robotic car, they feel they were shrunk.
<H3> CHI 2020, Full Paper
<H3> IEEE VR 2020, Doctoral Consortium
<H3> IEEE VR 2019, Poster
<H3> IEEE VR 2019, Poster
<H3> IEEE HRI 2019, Full Paper
<H3> ACM CHI 2018, Full Paper
<H3> ACM CHI 2017, Full Paper
<H3> ACM MobileHCI 2015, Full Paper
<H3> ACM MobileHCI 2015, Full Paper
<H3> ACM CHI 2014, Full Paper
<H3> MM 2013, short paper
<H3> Best Poster Honorable Mention, In 2019 IEEE Conference onVirtual Reality and 3D User Interfaces (VR), 2019
<H3> Selected poster, The Cornell CIS 20th Anniversary Reception, 2019
<H3> 1st Prize, The 11th Deep Innovations with Impact, National Taiwan University, 2013
<H3> 1st Prize, The 11th Y.S. National Innovation Software Application Contest, 2014
<H3> Excellent Work, The 8th Acer Long-Term Smile Innovation Contest, 2014
<H3> Final Shortlist, ACM UIST 2014 Student Innovation Contest
<H3> 2nd Prize, MobileHero – user experience design competition, 2014
<H3> Final Shortlist, MediaTek Wearable device into IoT world competition, 2014
<H3> Copyright © 2014 Eric Wang
<H3> Last Update: Nov. 2019
<H3> Published in MM 2013 (short paper)
<H3> We present RealSense, a technology that enables users to easily share media files with proximate users by detecting the relative direction of each other only with built-in orientation sensors on smartphones. With premise that users are arranged as a circle and every user is facing the center of that circle, RealSense continuously collects the directional heading of each phone to calculate the virtual position of each user in real time during the sharing.
<H3> RealSense users can simply share photos to others by swiping and throwing the photo to another user’s direction without remembering or searching the name and even the device id of a specific receiver. We evaluated the orientation sensor error and the minimal arc degree for selection, and compared RealSense with linear menu, pie menu and NFC. Our results show that the limitation that requires participants to face toward the circle center is rather acceptable and participants preferred RealSense than other sharing interactions especially they were unacquainted with each other.
<H3> Published in CHI 2014 (full paper)
<H3> We present EverTutor, a system that automatically generates interactive tutorials on smartphone from user demonstration. For tutorial authors, it simplifies the tutorial creation. For tutorial users, it provides contextual step-by-step guidance and avoids the frequent context switching between tutorials and users' primary tasks. In order to generate the tutorials automatically, EverTutor records low-level touch events to detect gestures and identify on-screen targets. When a tutorial is browsed, the system uses vision-based techniques to locate the target regions and overlays the corresponding input prompt contextually. It also identifies the correctness of users' interaction to guide the users step by step.
<H3> We conducted a 6-person user study for creating tutorials and a 12-person user study for browsing tutorials, and we compared EverTutor's interactive tutorials to static and video ones. Study results show that creating tutorials by EverTutor is simpler and faster than producing static and video tutorials. Also, when using the tutorials, the task completion time for interactive tutorials were 3-6 times faster than static and video tutorials regardless of age group. In terms of user preference, 83% of the users chose interactive type as the preferred tutorial type and rated it easiest to follow and easiest to understand.
<H3> We present PalmType, which uses palms as interactive key- boards for smart wearable displays, such as Google Glass. PalmType leverages users’ innate ability to pinpoint specific areas of their palms and fingers without visual attention (i.e. proprioception), and provides visual feedback via the wear- able displays. With wrist-worn sensors and wearable dis- plays, PalmType enables typing without requiring users to hold any devices and does not require visual attention to their hands. We conducted design sessions with 6 participants to see how users map QWERTY layout to their hands based on their proprioception.
<H3> To evaluate typing performance and preference, we conducted a 12-person user study using Google Glass and Vicon motion tracking system, which showed that PalmType with optimized QWERTY layout is 39% faster than current touchpad-based keyboards. In addition, PalmType is preferred by 92% of the participants. We demonstrate the feasibility of wearable PalmType by building a prototype that uses a wrist-worn array of 15 infrared sensors to detect users’ finger position and taps, and provides visual feedback via Google Glass.
<H3> Excellent Work, The 8th Acer Long-Term Smile Innovation Contest, 2014
<H3> We present EyeWrist, which uses palms as the gesture interface for smart wearable displays such as Google Glass. With abundant tactile cues and proprioception on palms, EyeWrist can also be leveraged for device-less and eyes-free remote for smart TVs. EyeWrist embeds a micro-camera and an IR laser line generator on the wristband and use computer vision algorithms to calculate the finger’s position on the palm. Without requiring the line of sight of users’ fingertips on palms, the camera height could be lower, making the whole device more portable. We also implemented a gesture recognizer to distinguish different symbols, letters or touchscreen gestures(e.g. swipe, pinch) on palms. The recognition result would be sent to smart devices via Wi-Fi for gesture-based interaction.
<H3> Submitted to ACM MobileHCI 2015, Full Paper
<H3> With abundant tactile cues and proprioception on palms, the palm can be leveraged as an interface for eyes-free input which decreases visual attention to interfaces and minimizes cognitive/physical effort. In this paper, we explored eyes-free gesture interactions on palms, which enables users to interact with devices by drawing stroke gestures on palms without looking at palms. In two 24-person user studies, we observed that (1) users preferred using the whole palm region as the gesture interface with 3 categories of hand orientations. (2) users tended to draw different gestures from the same start region due to proprioception on palms. (3) the accuracy of eyes-free Graffiti input and multi-stroke gesture recognizer on palm interface reached as high as 98% and 95% respectively. (4) the tactile feedback of palms can significantly help participants build up spatial memory of gestures. Also, we implemented EyeWrist that turns the palm into a gesture interface by em- bedding a micro-camera and an IR laser line generator on the wristband, and three interaction techniques that takes advantages of palm characteristics are proposed. The preliminary evaluation revealed that EyeWrist enabled users to draw graffiti letter and multi-stroke gestures with 90% above accuracy, and that the concept of eyes-free palm-based gesture interaction was appealing to users.
<H3> 12/03 Final, MobileHero – user experience design competition, 2014
<H3> We present EyeWatch, which uses back of the hand as gesture interface for smart watches. EyeWatch not only overcomes the Big smartwatch problem: occlusion and fat finger problem, but also enables more powerful and natural interaction such as drawing a symbol quickly to open an application, or intuitively handwriting on back of hand to input message. Our proof-of-concept implementation consists of a micro-camera and an IR laser line generator on the smart watch, and computer vision algorithms are used to calculate the finger’s position on the back of hand.
<H3> ACM UIST 2014 Student Innovation Contest
<H3> Imagining you were shrunk, you can explore your big house, play with big pets and family. To fulfill the imagination and provide users with incredible shrinking adventures, we use a robotic car and a google cardboard which turns a smartphone into a VR headset. We build a robotic car and attach a smartphone on the pan/tilt servo bracket. stereo images are generated from smartphone’s camera and are streamed to the other smartphone inside of the google cardboard. When users see the world through the smartphone on robotic car, they feel they were shrunk.
<H4> Cheng-Yao Wang , Mose Sakashita, Jingjin Li, Upol Ehsan, and Andrea Stevenson Won
<H4> Cheng-Yao Wang , Shengguang Bai, Ian Switzer, and Andrea Stevenson Won
<H4> Cheng-Yao Wang , Mose Sakashita, Upol Ehsan, Jingjin Li, and Andrea Stevenson Won
<H4> Cheng-Yao Wang , Logan Drumm, Christopher Troup, Yingjie Ding, and Andrea Stevenson Won
<H4> Jessica R. Cauchard, Alex Tamkin, Cheng-Yao Wang, , Luke Vink, Michelle Park, Tommy Fang, and James A. Landay
<H4> Huaishu Peng, Cheng-Yao Wang *, Jimmy Briggs*, Kevin Guo, Joseph Kider, Stefanie Mueller, Patrick Baudisch, François Guimbretière. (*equal contribution)
<H4> Ian Arawjo, Cheng-Yao Wang, Andrew C. Myers, Erik Andersen, and François Guimbretière
<H4> Cheng-Yao Wang, Wei-Chen Chu, Po-Tsung Chiu, Min-Chieh Hsiu, Yih-Harn Chiang, Mike Y. Chen
<H4> Cheng-Yao Wang, Min-Chieh Hsiu, Po-Tsung Chiu, Chiao-Hui Chang, Liwei Chan, Bing-Yu Chen, Mike Y. Chen
<H4> Cheng-Yao Wang, Wei-Chen Chu, Hou-Ren Chen, Chun-Yen Hsu, Mike Y. Chen
<H4> Chien-Pang Lin, Cheng-Yao Wang, Hou-Ren Chen, Wei-Chen Chu, Mike Y. Chen
<H4> Cheng-Yao Wang, Po-Tsung Chiu, Min-Chieh Hsiu, Chiao-Hui Chang, Mike Y. Chen
<H4> Cheng-Yao Wang, Po-Tsung Chiu, Min-Chieh Hsiu
<H4> Cheng-Yao Wang, Min-Chieh Hsiu, Chin-Yu Chien, Shuo Yang
<H4> Cheng-Yao Wang , Mose Sakashita, Jingjin Li, Upol Ehsan, and Andrea Stevenson Won
<H4> Cheng-Yao Wang
<H4> Cheng-Yao Wang , Mose Sakashita, Upol Ehsan, Jingjin Li, and Andrea Stevenson Won
<H4> Cheng-Yao Wang , Logan Drumm, Christopher Troup, Yingjie Ding, and Andrea Stevenson Won
<H4> Jessica R. Cauchard, Alex Tamkin, Cheng-Yao Wang , Luke Vink, Michelle Park, Tommy Fang, and James A. Landay
<H4> Huaishu Peng, Cheng-Yao Wang *, Jimmy Briggs*, Kevin Guo, Joseph Kider, Stefanie Mueller, Patrick Baudisch, François Guimbretière. (*equal contribution)
<H4> Ian Arawjo, Cheng-Yao Wang , Andrew C. Myers, Erik Andersen, and François Guimbretière
<H4> Cheng-Yao Wang, Wei-Chen Chu, Po-Tsung Chiu, Min-Chieh Hsiu, Yih-Harn Chiang, Mike Y. Chen
<H4> Cheng-Yao Wang, Min-Chieh Hsiu, Po-Tsung Chiu, Chiao-Hui Chang, Liwei Chan, Bing-Yu Chen, Mike Y. Chen
<H4> Cheng-Yao Wang, Wei-Chen Chu, Hou-Ren Chen, Chun-Yen Hsu, Mike Y. Chen
<H4> Chien-Pang Lin, Cheng-Yao Wang, Hou-Ren Chen, Wei-Chen Chu, Mike Y. Chen
<H4> Chien-Pang Lin, Cheng-Yao Wang, Hou-Ren Chen, Wei-Chen Chu, Mike Y. Chen
<H4> Cheng-Yao Wang, Wei-Chen Chu, Hou-Ren Chen, Chun-Yen Hsu, Mike Y. Chen
<H4> Cheng-Yao Wang, Wei-Chen Chu, Po-Tsung Chiu, Yih Harn Chiang, Mike Y. Chen
<H4> Cheng-Yao Wang, Po-Tsung Chiu, Min-Chieh Hsiu, Chiao-Hui Chang, Mike Y. Chen
<H4> Cheng-Yao Wang, Po-Tsung Chiu, Min-Chieh Hsiu
<H4> Cheng-Yao Wang, Min-Chieh Hsiu, Chin-Yu Chien, Shuo Yang
<H5> Sep '16 – Current
<H5> Sep '12 – Jun '14
<H5> Feb '06 – Aug '10
<H5> Fall 2019
<H5> Fall 2018
<H5> Spring 2018
<H5> Fall 2017
<H5> Spring 2017
<H5> Fall 2016
<H5> Apr '15 – Sep '15
<H5> Aug '14 – Sep '14
<H5> Feb '14 – Jun '14
and 171 more.

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Content Analysis

  • easily share media files 2
  • ir laser line generator 6
  • corresponding input prompt contextually 2
  • asynchronous 3d collaborative design 2
  • users map qwerty layout 2
  • system uses vision-based techniques 2
  • automatically generates interactive tutorials 2
  • user experience design competition 3
  • reliving virtual reality experiences 3
  • use computer vision algorithms 2
  • contextual step-by-step guidance 2
  • explored eyes-free gesture interactions 2
  • socially reliving experiences 2
  • computer vision algorithms 4
  • acm mobilehci 2015 3
  • reliving virtualreality experiences 2
  • national taiwan university 5
  • robotic 3d printer 2
  • andrea stevenson won 8
  • frequent context switching 2

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http://ericwang.info/img/projects/e-wa-logo.png
http://ericwang.info/img/projects/e-wa-img1.png
http://ericwang.info/img/projects/e-wa-img2.png
http://ericwang.info/img/projects/s-a-screen.png
http://ericwang.info/img/projects/s-a-sketch.png
http://ericwang.info/img/projects/s-a-car2.jpg
http://ericwang.info/img/projects/r-s-img3.jpg
http://ericwang.info/img/projects/r-s-img4.jpg
and 42 more.

Alternative text allows you to add a description to an image. Since search engine crawlers cannot see images, they rely on alternative text attributes to determine relevance to a search query. Alternative text also helps makes an image more likely to appear in a Google image search and is used by screen readers to provide context for visually impaired users.

It looks like you're missing alternative text for 47 images on ericwang.info. Check the images on your website to make sure accurate and relevant alternative text is specified for each image on the page.

Try to keep your alternative text to a simple, one-sentence description of what's in the image.

Set a name for all your images

Language

Declared: English

Detected: English

Great, your declared language matches the language detected on the page.

Make sure your declared language is the same as the language detected by Google.

Tips for multilingual websites:

Declare the language used

Indexing

URL Resolve

Warning, no 301 redirects are in place to redirect traffic to your preferred domain. Pages that load successfully both with and without www. are treated as duplicate content!

Not all versions of your page point to the same URL.

Search engines see www.ericwang.info and ericwang.info as two different websites with the same content. This causes them to see a lot of duplicate content, which they don't like.

Right now your website is not directing traffic to www.ericwang.info and ericwang.info to the same URL. It is crucial that you fix this.

Use the rel="canonical" tag to tell search engines which is the definitive version of your domain. Use a 301 redirect to divert traffic from your secondary domain.

This issue can be caused by problems with a website's SSL configuration. Check your site's SSL configuration for any errors.

If you need help resolving issues with your SSL configuration, consider using a professional service to set it up for you.

Redirect non-www to www

Robots.txt

Missing

A robots.txt file allows you to restrict the access of search engine crawlers to prevent them from accessing specific pages or directories. They also point the web crawler to your page’s XML sitemap file.

We checked ericwang.info/robots.txt and didn't find a robots.txt file. Use Google Search Console to submit and test your robots.txt file. You can also test individual pages to make sure Google isn't crawling any restricted files.

Add a robots.txt file

XML Sitemap

No sitemap found in your robots.txt.

We checked the robots.txt file for ericwang.info but couldn't find an XML sitemap. Specifying the location of your XML sitemaps in your robots.txt file ensures that search engines and other crawlers find and access it easily each time they access your website.

Learn more about adding your XML sitemap to your robots.txt file.

If you haven't created a sitemap yet, we recommend you generate one for your site and submit it through both Google Search Console and Bing Webmaster Tools. Usually, your XML sitemap would be found at ericwang.info/sitemap.xml

Make sure to only include the pages you want search engines to crawl, so leave out any that have been blocked in a robots.txt file. Avoid using any URLs that cause redirects or error codes and be consistent in using your preferred URLs (with or without www.), correct protocols (http vs. https) and trailing slashes.
Add and Optimize your XML sitemap

URL Parameters

Good, the URLs look clean.

URL parameters are used to track user behaviors on site (session IDs), traffic sources (referrer IDs) or to give users control over the content on the page (sorting and filtering). The issue with URL parameters is that Google sees each unique parameter value as a new URL hosting the same thing - meaning you could have a duplicate content problem. Sometimes, it’s able to recognize these URLs and group them together. It then algorithmically decides which URL is the best representation of the group and uses it to consolidate ranking signals and display in search results. You can help Google recognize the best URL by using the rel="canonical" tag.

Use the URL Parameters Tool in Google Search Console to tell Google how your URL parameters affect page content and how to to crawl URLs with parameters. Use this tool very carefully - you can easily prevent Google from crawling pages you want indexed through overly restrictive crawling settings, especially if you have URLs with multiple parameters.

Check the On-Page section of Site Crawl to identify any duplicate content issues.
Rewrite your URLs and clean them up.

Hreflang Tags

No hreflang tags were found on this page

The hreflang tag is an HTML tag that tells search engines which languages and (optionally) countries a page's content is relevant for. Hreflang tags also tell search engines where to find the relevant content in alternate languages.

If your website targets users all around the world, using hreflang tags will help make sure the right content is being served to the right users.

The value of the hreflang attribute identifies the language (in ISO 639-1 format) and optionally a region in ISO 3166-1 Alpha 2 format of an alternate URL.

Use WooRank's Site Crawl to perform a thorough check on hreflang validity across a website.

Underscores in the URLs

We found underscores in this URL and/or in your in-page URLs.

Using underscores in your URL makes it hard for search engines to determine your site's relevance to a search. Google sees hyphens as word separators while underscores are ignored. So the search engine sees http://ericwang.info/img/projects/poster-lilliput_small.png as all one word. Use hyphens in your URLs instead: http://ericwang.info/img/projects/poster-lilliput-small.png.

We've detected underscores in your URLs. Change underscores to hyphens to maximize your SEO.

Mobile

Mobile Friendliness

Fair    Fair

This website is not optimized for Mobile Visitors

Mobile friendly pages make it easy for users to complete their objectives and common tasks and use a design or template that is consistent across all devices (uses responsive web design).

Google released a new mobile ranking algorithm that expanded the use of mobile-friendliness in its mobile search rankings. With almost half of all Google search queries originating on a mobile device, it is important to make sure your mobile site is optimized for these users.

Mobile Rendering

ericwang.info on an iPhone
ericwang.info on an iPad

This is how your website appears when displayed on different mobile devices.

With more than half of all Google search queries originating on a mobile device, it is important to make sure your mobile site is optimized for these users.

Tap Targets

In the table below, find the tap targets that are too small, their size in pixels and the overlapping target that is too close to be easily clicked.

Tap Target Size Overlapping Target
<a href="https://communication.cals.cornell.edu/people/andrea-won" target="_blank">Prof.&nbsp;Andrea 129x14 <a href="https://profiles.stanford.edu/james-landay/" target="_blank">Prof. James Landay</a>
<a href="https://profiles.stanford.edu/james-landay/" target="_blank">Prof. James Landay</a> 323x29 <a href="http://mikechen.com/" target="_blank">Prof. Mike Y. Chen</a>
Your page’s links and buttons are too small and/or too close to be easily clicked on a mobile device. The average fingertip area is 48 pixels in width and height. Tap targets should also be spaced enough so that a user's finger pressing on one link or button does not inadvertently touch another one. The minimum required space between tap targets is 8 pixels on all sides.

Use Google's Lighthouse tool to get a detailed look at all of your too tap targets that are too small and too close together.

Plugins

Perfect, no plugin content detected.

Great, your website does not embed any special types of web content, such as Flash, Silverlight or Java, so your content can be accessed on all devices.

Font Size Legibility

This web page’s text is too small for legibility on mobile devices.

Font sizes smaller than 12 pixels are hard to read on mobile devices. Make sure to use font sizes greater than 12 pixels in at least 60% of your page text so users can read your content on mobile devices.

Learn more about setting font sizes for mobile devices in our guide to mobile font sizes.

Mobile Viewport

Great, a configured viewport is present.

The content fits within the specified viewport size.

Great, the viewport is well configured.

Keep in mind that since the width (in CSS pixels) of the viewport may vary, your page content should not solely rely on a particular viewport width to render well. Consider these additional tips:
  • Avoid setting large absolute CSS widths for page elements.
  • If necessary, CSS media queries can be used to apply different styling depending on screen size.
  • Ideally, serve responsively-sized images.

Mobile Frameworks

No mobile frameworks have been detected.

Mobile or responsive frameworks are an important part of website optimization as they assist developers in creating applications which are applicable to multiple devices.

AMP

We didn't find AMP on your page.

AMP is an open-source library that provides a straightforward way to create web pages that are compelling, smooth, and load near instantaneously for users.

Check your AMP markup with the AMP validator.

Structured Data

Schema.org

We didn't detect any schema.org items on your webpage

Get started using Schema.org vocabulary and marking up your webpage.

Schema.org is a set of vocabularies used to add meaning to the information on a webpage in a way that is readable by machines (Google). Schema.org vocabularies include attributes for entities, relationships between entities and actions.

Learn more in Google's intro to structured data. Structuring data on your pages can help increase website traffic and improve audience engagement. Schema.org vocabulary can be added to a page using many different formats, including RDFa, Microdata and JSON-LD.

Open Graph Protocol

We didn't detect any Open Graph tags on your webpage

Facebook developed the Open Graph protocol to enable the integration of any web page with its social media platform. Other social media platforms have also adopted the protocol, allowing you to control how your web pages are presented when shared across social media.

Check out Facebook's Guide to Sharing for Webmasters to learn how to add Open Graph tags.

Use the Sharing Debugger to check what information appears when shared on Facebook and the Twitter Cards Validator to do the same for Twitter.

Microformats

Designed for humans first and machines second, microformats use code (HTML/XHTML tags) originally intended for other purposes to add context to the content on a webpage. This helps machines (like Google!) to understand certain information (contact information, geographic coordinates, calendar events, etc.) intended for humans.

Security

Email Privacy

Warning! At least one email address has been found in plain text.

We don’t recommend adding plain text/linked email addresses to your webpages, as malicious bots scrape the web in search of email addresses to spam. Instead, consider using a contact form.

Hide email addresses to avoid being spammed

SSL Secure

Your website is SSL secured (HTTPS), but the Common Name is set to *.github.com.

Your website's URLs do not redirect to HTTPS pages.

Your headers are not properly set up to use HSTS.

Renew your SSL certificate now, it expires 2 months ago.

The certificate issuer is DigiCert Inc.

Using an SSL certificate creates an encrypted connection between your visitor's browser and your website's server adding an extra layer of security. In 2014, Google announced that HTTPS would become part of their ranking algorithm and since your website is not HTTPS, it will likely rank below your HTTPS competitors. When moving to HTTPS, follow these best practices for a smooth transition:
  • Use a serious issuer to purchase your SSL certificate
  • Redirect all of your HTTP pages to the HTTPS version of your website
  • Use HTTP Strict Transport Security in your headers
  • Renew your SSL certificate every year, before it expires
  • Make sure that all of your content (CSS, etc.) is linked to HTTPS
  • Update your XML sitemap to ensure the URLs include HTTPS and update the robots.txt file to reference this version
  • Register the HTTPS website in Google & Bing Search Console/Webmaster Tools

Performance

Asset Minification

68%    68%

You could reduce (6.9 KiB) by minifying the asset(s) listed below.

URL Reduction size
/css/onepage.css 6.9 KiB (32%)
Fast websites make happy visitors. Enabling minification on assets like HTML, JavaScript and CSS files will reduce their transfer size. Every time a page is requested from your website less bytes and lighter assets are sent over the network resulting in faster delivery which loads your website faster for your customers.

Asset Compression

Perfect, all your assets are compressed.

Great! We didn't find uncompressed assets on your web page.
Compressing assets reduces the amount of time it takes a user's browser to download files from your server. Enabling compression is an important part of reducing the amount of time it takes your website to load.

Asset Cacheability

We found a total of 67 uncached asset(s) listed below.

URL Freshness lifetime
/css/bootstrap.min.css 10 minutes
/css/ekko-lightbox.min.css 10 minutes
/slick/slick.css 10 minutes
/css/onepage.css 10 minutes
/font-awesome-4.1.0/css/font-awesome.min.css 10 minutes
/img/projects/r-s-img3.jpg 10 minutes
/img/projects/r-s-img4.jpg 10 minutes
/js/jquery-1.11.0.js 10 minutes
/js/bootstrap.min.js 10 minutes
/js/agency.js 10 minutes
/js/classie.js 10 minutes
/js/cbpAnimatedHeader.js 10 minutes
/js/ekko-lightbox.min.js 10 minutes
/js/jquery.lazyload.min.js 10 minutes
/slick/slick.min.js 10 minutes
/img/linedpaper.png 10 minutes
/img/profile-thumb.jpg 10 minutes
/img/noisy-grid.png 10 minutes
/img/bg.jpeg 10 minutes
/img/light-wool.png 10 minutes
/img/footer_lodyas.png 10 minutes
/slick/ajax-loader.gif 10 minutes
/img/projects/ReliveInVR_study.png 10 minutes
/img/projects/ReliveReality_Idea.png 10 minutes
/img/projects/VR-Relive.png 10 minutes
/img/projects/VRReplay_Prototype_System.png 10 minutes
/img/projects/droneio_1.png 10 minutes
/img/projects/RoMA_img1.jpg 10 minutes
/img/projects/reduct_img1.png 10 minutes
/img/projects/p-t-palm.png 10 minutes
/img/projects/p-g-app1.png 10 minutes
/img/projects/e-t-gestures.jpg 10 minutes
/img/projects/r-s-img1.png 10 minutes
/img/projects/e-w-prototype2.jpg 10 minutes
/img/projects/e-wa-logo.png 10 minutes
/img/projects/s-a-screen.png 10 minutes
/img/top-profile3.jpg 10 minutes
/img/projects/reduct_img2.png 10 minutes
/img/projects/RoMA_img5.jpg 10 minutes
/img/projects/r-s-logo.png 10 minutes
/img/projects/p-g-img1.jpg 10 minutes
/img/projects/e-t-browse.jpg 10 minutes
/img/projects/e-w-scenario1.jpg 10 minutes
/img/projects/e-wa-img1.png 10 minutes
/img/projects/p-t-img1.png 10 minutes
/img/projects/RoMA_img4.jpg 10 minutes
/img/projects/s-a-sketch.png 10 minutes
/img/projects/r-s-img2.png 10 minutes
/img/projects/p-g-app3.png 10 minutes
/img/projects/e-t-create.jpg 10 minutes
/img/projects/e-w-prototype.jpg 10 minutes
/img/projects/e-wa-img2.png 10 minutes
/img/projects/s-a-car2.jpg 10 minutes
/img/projects/p-t-img3.jpg 10 minutes
/img/projects/ReliveReality_final.png 10 minutes
/img/projects/droneio_2.png 10 minutes
/img/projects/VRReplay_User_Study.png 10 minutes
/img/projects/droneio_3.png 10 minutes
/img/projects/VR_interactions_new.png 10 minutes
/img/projects/Co-WatchDT.png 10 minutes
/img/projects/VR_Interaction2.png 10 minutes
/img/projects/ReliveReality_P1.png 10 minutes
/img/projects/study_conditions.png 10 minutes
/img/projects/ReliveReality_P2.png 10 minutes
/img/projects/Co-watchVR.png 10 minutes
/img/projects/ReliveReality_P3.png 10 minutes
/img/projects/ReliveInVR.png 10 minutes
and 64 more.
Fast websites make happy visitors. Caching assets such as images, javascript and CSS files allows a browser to keep these files in local storage so it doesn't have to download them every time it requests a page on your website. This will lower the bandwidth used and improve the page load time.

To learn more on how to enable caching for your assets you can check out our guide to asset caching and SEO or consult Google's PageSpeed Insights guide on browser caching.

Technologies

Server Uptime

Upgrade now and get notified when ericwang.info goes down.
Free Trial

Server IP

192.30.252.154

Your server's IP address has little impact on your SEO. Nevertheless, try to host your website on a server which is geographically close to your visitors. Search engines take the geolocation of a server into account as well as the server speed.

Use DNSstuff for comprehensive reports on your server.

Technologies

Get to know the technologies used for your website. Some codes might slow down your website. Ask your webmaster to take a look at this.

Analytics

We didn't detect an analytics tool installed on this website.

Web analytics let you measure visitor activity on your website. You should have at least one analytics tool installed, but It can also be good to install a second in order to cross-check the data.

Popular Analytics Tools Include: Google Analytics, Quantcast™, AdobeAnalytics™, Piwik™, chartbeat™, Clicky™, ClickTale™, etc.

Doctype

HTML5

The Doctype is used to instruct web browsers about the document type being used. For example, what version of HTML the page is written in.

Declaring a doctype helps web browsers to render content correctly.

Encoding

Great, language/character encoding is specified: utf8

Specifying language/character encoding can prevent problems with the rendering of special characters.

Branding

URL

ericwang.info

Length: 8 character(s)

Keep your URLs short and clean and avoid long domain names when possible.

A descriptive URL is better recognized by search engines. A user should be able to look at the address bar and make an accurate guess about the content of the page before reaching it (e.g., http://www.mysite.com/en/products).

Keep in mind that URLs are also an important part of a comprehensive SEO strategy. Use clean URLs to make your site more "crawlable" by Google.

Resource: Search for a good domain name. If no good names are available, consider a second hand domain. To prevent brand theft, you might consider trademarking your domain name.

Favicon

Your website does not have a favicon.

Favicons are the small icons that represent a website, company and/or brand. They can be displayed (among other instances) in browser tabs or bookmarks. Google also displays favicons in a page's search snippet in mobile search results.

You can see how your site's favicon appears in search results in the Google Preview above.

Make sure your favicon is consistent with your brand to help improve visibility.
Add a Favicon

Custom 404 Page

Great, your website has a custom 404 error page.

Your server responded with the HTTP status code: 404

Custom 404 error pages are an opportunity for you to reduce customer frustration and link to other pages on your site.

Customize the 404 error page

Domain

Domain Registration

Created 6 years ago

Expires in 5 months

Your domain, ericwang.info, is the human-readable address of your website on the Internet.

Domain age and registration won’t impact a website’s rankings, but it’s important to keep your registration up to date to prevent someone else from buying it.
Off-Page

Traffic

Mobile visits

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Google Analytics

Sessions

Upgrade to sync your Google Analytics account and find significant metrics like:
  • Traffic Source
  • Source Domains
  • Pageviews and more!
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Local

Local Directories

Upgrade to see the latest reviews of ericwang.info in local directories
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Social Profiles

LinkedIn Account

We found https://www.linkedin.com/in/ericwanghci on your webpage. If this is your account, add it to your structured data.

We couldn't find a LinkedIn Account for ericwang.info defined in your structured data.

With 562 million users, LinkedIn is all about building networks and connections. It’s not only about who you know, but about who your connections know.
That’s the real power of LinkedIn for business: the ability to tap into existing connections and grow your brand through word-of-mouth.

Having a LinkedIn Company Page helps people learn about your business and your brand.

Facebook

Facebook Views

Upgrade to connect your Facebook Page and get in-depth insights about:
  • Views
  • Activity
  • Demographics and more!
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Keyword Tool

Google Ranking

Upgrade to monitor ericwang.info’s Google ranking for custom keywords
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