Wednesday, January 23, 2013

Spotted: Ubiquitous emotion-aware computing

Heart and voice measures can capture most emotion. 

Ubiquitous emotion-aware computing

Egon L. Broek

Emotions are a crucial element for personal and ubiquitous computing. What to sense and how to sense it, however, remain a challenge. This study explores the rare combination of speech, electrocardiogram, and a revised Self-Assessment Mannequin to assess people's emotions. 40 people watched 30 International Affective Picture System pictures in either an office or a living-room environment. Additionally, their personality traits neuroticism and extroversion and demographic information (i.e., gender, nationality, and level of education) were recorded. The resulting data were analyzed using both basic emotion categories and the valence--arousal model, which enabled a comparison between both representations. The combination of heart rate variability and three speech measures (i.e., variability of the fundamental frequency of pitch (F0), intensity, and energy) explained 90% (p < .001) of the participants' experienced valence--arousal, with 88% for valence and 99% for arousal (ps < .001).

Spotted: An evaluation tool for research of user behavior in a realistic mobile environment

Could be useful. 

An evaluation tool for research of user behavior in a realistic mobile environment

Ivo Maly, Zdenek Mikovec, Jan Vystrcil, Jakub Franc, Pavel Slavik

User behavior is significantly influenced by the surrounding environment. Especially complex and dynamically changing environments (like mobile environment) are represented by a wide variety of extraneous variables, which influence the user behavior in an unpredictable and mostly uncontrolled way. For researchers, it is challenging to measure and analyze the user behavior in such environments. We introduce a complex tool--the IVE tool--which provides a unique way of context visualization and synchronization of measured data of various kinds. Thanks to this tool it is possible to efficiently evaluate data acquired during complex usability tests in a mobile environment. The functionality of this tool is demonstrated on the use case "Navigation of visually impaired users in the building with support of a navigation system called NaviTerier."

Thursday, January 10, 2013

Spotted: interactive photon mapping on the gpu

Toward Practical Real-Time Photon Mapping: Efficient GPU Density Estimation <[link]>

Wednesday, January 09, 2013

Find: looks fascinating, as does PBS' OffBook - 'The Art of Creative Coding' explores the intersection of art and programming

'The Art of Creative Coding' explores the intersection of art and programming

nikefuelband wall

In the latest installment of its Off Book web series, PBS explores the ways in which coding can be used artistically, and displays some of the amazing art that has been created using software such as Processing, Cinder, and Open Frameworks. These programs, Cinder programmer Keith Butters claims, allow artists to steer clear of "the boring stuff" to focus instead on actually creating beautiful work. This artistic movement — referred to as "creative coding" — relies heavily on the open source nature of these programs, which drives many coding artists to share the tools they have developed and the things they learned on any given project. The future of creative coding, according to Open Frameworks developers, lies with the community —...

Find: How to index twitter? Library of Congress won't launch its Twitter archive soon

All sorts of interesting problems here. Visualization, search, sentiment, summary, big data ...

Library of Congress won't launch its Twitter archive anytime soon

twitter fail whale

In 2010, the Library of Congress announced plans to collect every public Twitter post in a single searchable archive, as part of a bold attempt to create a new repository of digital information. Two years later, however, the project has yet to get off the ground, primarily because the Library hasn't come up with an efficient way to harness such a massive amount of data.

On Friday, the LOC published a white paper explaining the delay, which it attributes to a lack of available software and constrained budgets. The organization has already created a private archive, but it remains virtually unsearchable. According to the library, a single query on its current system "could take 24 hours" to yield results. Fixing this problem, it says,...

Sunday, January 06, 2013

Find: 50 ms isn't enough - How fast does “virtual reality” have to be to look like “actual reality”?

How fast does “virtual reality” have to be to look like “actual reality”?


For decades now, virtual reality has been a pipe dream concept, well ahead of the technology needed to realize it. Generating a convincing 3D world that precisely and instantly matches the head-tracked position of a player's gaze was well beyond the headsets that proliferated in research centers and on the market up through the '90s. It has only been recently that products like Sony's prototype gaming headset and the upcoming Oculus Rift have seriously attempted to create believable virtual reality headsets using modern head-tracking and display technology.

But there are some who think the technology in these systems still hasn't been developed far enough to create a truly believable, head-tracked virtual reality. Valve's Michael Abrash laid out this case in a detailed blog post last weekend, suggesting that VR headsets need a "Kobayashi Maru moment" to solve the inherent problem of display latency that plagues current and upcoming headsets.

Current non-VR games usually bottom out at about 50 milliseconds (ms) of latency between a controller input and the time the pixels actually update. That's more than fine when viewing an image on a stationary screen, Abrash says, but VR systems need much better latency in order to trick the brain into thinking it's looking at a virtual world that completely surrounds the player wherever he or she looks. "The key to this is that virtual objects have to stay in very nearly the same perceived real-world locations as you move; that is, they have to register as being in almost exactly the right position all the time," Abrash writes. "Being right 99 percent of the time is no good, because the occasional mis-registration is precisely the sort of thing your visual system is designed to detect, and will stick out like a sore thumb."

Wednesday, January 02, 2013

Find: doug trumbull, fx pioneer and inventor of hfr 30 years ago, on its history and proper use

Hfr elicits a stronger visceral response, his testing showed. 


Meet the Hollywood eccentric who invented high frame rate film 30 years before 'The Hobbit'

Douglas Trumbull

The hyperreal high frame rate style that came into theaters with The Hobbit is usually described as cutting edge, but it's older than most of the people buying tickets. HFR has actually had a nearly 40-year journey to the theaters, starting from a small Paramount lab run by Douglas Trumbull. Along the way, it's battled through a thicket of industry inertia to emerge as one of the most important and controversial technologies in Hollywood.

The final product was called Showscan, the first theater-ready HFR Hollywood had ever seen

Trumbull's history with HFR starts in 1978, when he co-founded a lab called Future General Corporation as an offshoot of Paramount Studios. Part of its business was special effects, taking on projects like the...

Find: eye tracking tech getting affordable

Tobii Rex lets you control any Windows 8 PC with eye-tracking tech

tobii rex stock press 640

It looks like $21 million in Intel cash and a few promising prototypes weren't enough to convince manufacturers to build eye-controlled tablets quite yet. Tobii, the company behind the eye-tracking Gaze technology we sampled at last year's CES — and again at CeBIT — has just announced a standalone eye-tracking kit you can add to any existing Windows 8 computer. It's called the Tobii Rex, and it's a stick-like device you mount underneath your screen and attach to a USB port on your PC. The company says you'll use it alongside traditional peripherals like mouse and keyboard, as it's meant to augment rather than replace.

For the short term, though, you probably won't be using a Tobii Rex at all: the company's producing just 5,000 of...