Fast generation of three-dimensional video holograms by combined use of data compression and lookup table techniques

2008 ◽  
Vol 47 (32) ◽  
pp. 5986 ◽  
Author(s):  
Seung-Cheol Kim ◽  
Jung-Hoon Yoon ◽  
Eun-Soo Kim
Keyword(s):  
Data Compression ◽  
Three Dimensional ◽  
Lookup Table ◽  
Use Of Data ◽  
Combined Use

Effects of Ride Motion on the Speed and Accuracy of In-Vehicle Pointing Tasks

2005 ◽  
Vol 49 (12) ◽  
pp. 1119-1123
Author(s):  
Kevin A. Rider ◽  
Bernard J. Martin
Keyword(s):  
Principal Direction ◽  
Three Dimensional ◽  
Movement Speed ◽  
Moving Vehicle ◽  
Combined Use ◽  
Principal Axes ◽  
Vehicle Acceleration ◽  
The Relationship ◽  
Speed And Accuracy

Terrain-induced vibration of a moving vehicle adversely affects the ability to quickly and accurately perform in-vehicle pointing tasks by altering the planned fingertip trajectory. The relationship between movement speed and accuracy is a result of the combined use of visual and somatosensory feedbacks which are used to discern movement deviations and make necessary compensatory movements. Participants (N=20) performed three-dimensional rapid pointing tasks under stationary and ride motion conditions to three touchpanel displays. Ride motion contributed to increased reaction and movement times and increased endpoint variability. Trajectory deviations were correlated to the principal direction of vehicle acceleration. Reaches orthogonal to the dominant vehicle acceleration exhibited larger endpoint variability, and reaches to the elevated touchpanel resulted in the largest variability across all motion conditions. Principal axes of endpoint ellipses were along the on-axis and off-axis directions of fingertip movement.

scholarly journals The Localization of Activity Sources in a Three-Dimensional Model of the Human Brain Using the Joint Analysis of EEG / sMRI Data

2019 ◽  
Vol 17 (3) ◽  
pp. 18-28
Author(s):  
E. Bykova ◽  
A. Savostyanov
Keyword(s):  
Inverse Problem ◽  
Brain Activity ◽  
Three Dimensional ◽  
Human Head ◽  
Joint Analysis ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Use Of Data ◽  
The Individual ◽  
The Brain

Despite the large number of existing methods of the diagnosis of the brain, brain remains the least studied part of the human body. Electroencephalography (EEG) is one of the most popular methods of studying of brain activity due to its relative cheapness, harmless, and mobility of equipment. While analyzing the EEG data of the brain, the problem of solving of the inverse problem of electroencephalography, the localization of the sources of electrical activity of the brain, arises. This problem can be formulated as follows: according to the signals recorded on the surface of the head, it is necessary to determine the location of sources of these signals in the brain. The purpose of my research is to develop a software system for localization of brain activity sources based on the joint analysis of EEG and sMRI data. There are various approaches to solving of the inverse problem of EEG. To obtain the most exact results, some of them involve the use of data on the individual anatomy of the human head – structural magnetic resonance imaging (sMRI data). In this paper, one of these approaches is supposed to be used – Electromagnetic Spatiotemporal Independent Component Analysis (EMSICA) proposed by A. Tsai. The article describes the main stages of the system, such as preprocessing of the initial data; the calculation of the special matrix of the EMSICA approach, the values of which show the level of activity of a certain part of the brain; visualization of brain activity sources on its three-dimensional model.

‘Modulation’ by Richard Powers: Digital sound, compression and the short story

2021 ◽  
Vol 11 (1-2) ◽  
pp. 161-176
Author(s):  
Michael Hedges
Keyword(s):  
Data Compression ◽  
Short Story ◽  
Original Music ◽  
Richard Powers ◽  
Recording Industry ◽  
File Size ◽  
Cultural Artifact ◽  
Use Of Data ◽  
Music File ◽  
Digital Sound

This article presents a reading of ‘Modulation’ (2008) by Richard Powers. Firstly, I consider the short story’s representation of the MP3 music file, specifically its effects on how music is circulated and stored, as well as how it sounds. These changes are the result of different processes of compression. The MP3 format makes use of data compression to reduce the file size of a digital recording significantly. Such a loss of information devises new social and material relations between what remains of the original music, the recording industry from which MP3s emerged and the online markets into which they enter. I argue that ‘Modulation’ is a powerful evocation of a watershed moment in how we consume digital sound: what Jonathan Sterne has termed the rise of the MP3 as ‘cultural artifact’. I contend that the short story, like the MP3, is also a compressed manner of representation. I use narrative theory and short story criticism to substantiate this claim, before positioning ‘Modulation’ alongside Powers’s novels of information. I conclude by suggesting that ‘Modulation’ offers an alternative to representing information through an excess of data. This article reads Powers’s compressed prose as a formal iteration of the data compression the story narrates.

Using Word Trees, Word Networks, and Tag Clouds to Provide Meaningful Insights

2014 ◽  
pp. 1536-1559
Author(s):  
Anil Bilgihan ◽  
Denver Severt ◽  
Jay Kandampully
Keyword(s):  
Service Performance ◽  
Tag Clouds ◽  
Use Of Data ◽  
Web Spider ◽  
Units Of Analysis ◽  
Mixed Use ◽  
Combined Use ◽  
Consumer Reports ◽  
Consumer Assessments ◽  
Corporate Consumer

The combined use of data mining techniques and qualitative consumer reports can provide meaningful insights into service performance and relevant decision making. In several case studies, the authors combine qualitative comments from an online hotel feedback website about popular travel destinations, as reported by business, pleasure, and mixed-use travelers. After extracting 1,893 useable customer comments, using a web spider application, the study software produced summaries of qualitative comments in the form of tag clouds, word networks, and word tree images. This technologically enabled analysis of consumer-reported information provides consumer researchers with more objective ratings of qualitative consumer assessments of their experience across various units of analysis, with several applications for corporate and operational management. Furthermore, several implications inform consumer researchers and corporate consumer research departments about effective ways to investigate and serve industry. This study also has several limitations that suggest routes for further research.

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