2,286 research outputs found
Neither playing the game nor keeping it real: media logics and Big Brother
Sam Pepper, one of the contestants in Big Brother 11, at one point accused fellow housemates Josie and John James of feigning romantic feelings for each other in order to cash in on lucrative deals with celebrity magazines such as OK! and Hello!. The provocation caused much apparent offence, and led to a prolonged and predominantly rancorous debate about authenticity and inauthenticity, soon extending to revelations that other housemates (Rachel, Corinne) aimed to appear in soft pornography titles like Nuts and Zoo, and as such, ‘couldn’t be trusted’. The clear subtext was that any economic motivation was considered a breach of the rules of the Big Brother game – not the explicit parameters of the competition, but the spirit in which it should be played. Being a worthy winner is a matter of who you are rather than what you do, which raises the question of how we came to know Josie and co, as well as how we come to know celebrity selves generally. If BB has taught us anything about the formation of mediated selves, it is that an authentic mediated self cannot exist – and yet authenticity still matters. This piece reflects on this tension and its implications for our increasingly reflexive media culture
Attendance Control Techniques: Union vs. Non-Union Differences in the Southeast United States
This research examines both the rate of absenteeism and the attendance control methods found in a sample of 423 union and non-union organizations located in the Southeast United States. These data indicate that absenteeism rates for union and non-union organizations are not significantly different. Methods of controlling absenteeism are reported for both union and non-union facilities. Implications for the control of absenteeism are discussed
Physiological Noise in Near-infrared Spectroscopy: Implications for Optical Brain Computer Interfacing
Near-infrared spectroscopy is a non-invasive optical method used to detect functional activation of the cerebral cortex. Cognitive, visual, auditory and motor tasks are among the functions that have been investigated by this technique in the context of optical brain computer interfacing. In order to determine whether the optical response is due to a stimulus, it is essential to identify and reduce the effects of physiological noise. This paper characterizes noise typically present in optical responses and reports signal processing approaches used to overcome such noise
An optical brain computer interface
This paper describes a novel approach to brain computer interfacing that uses optical analysis to provide physiological measures of brain function. We describe the optical analysis technique involved and the application of this method to development of our first prototype optical brain computer interfac
An optical brain computer interface
This paper describes a novel approach to brain computer interfacing that uses optical analysis to provide physiological measures of brain function. We describe the optical analysis technique involved and the application of this method to development of our first prototype optical brain computer interfac
Functional Brain Signals: A photon counting system for brain activity monitoring
A simplified in vivo near infrared spectroscopy
(NIRS) system for functional brain analysis and a protocol for the
study of visual evoked potentials in the human brain is presented.
A novel NIRS system bases on a simple photon counting technique
using a CW light source (laser diode at 780 nm), fibre optodes
delivering light to the subject and from the subject to detector, a
photomultiplier tube (PMT) for high infra-red (IR) response and
the 800 MHz Gated Photon Counter/multichannel scaler (MCS) for
data acquisition. A chequerboard stimulus was used to elicit a
response signal from the visual cortex. This photon signal arising
from the cortical systems of the brain was processed to detect
features indicative of the neural processing systems involved
Functional Brain Signals: A photon counting system for brain activity monitoring
A simplified in vivo near infrared spectroscopy
(NIRS) system for functional brain analysis and a protocol for the
study of visual evoked potentials in the human brain is presented.
A novel NIRS system bases on a simple photon counting technique
using a CW light source (laser diode at 780 nm), fibre optodes
delivering light to the subject and from the subject to detector, a
photomultiplier tube (PMT) for high infra-red (IR) response and
the 800 MHz Gated Photon Counter/multichannel scaler (MCS) for
data acquisition. A chequerboard stimulus was used to elicit a
response signal from the visual cortex. This photon signal arising
from the cortical systems of the brain was processed to detect
features indicative of the neural processing systems involved
Multi-timescale measurements of brain responses in visual cortex during functional stimulation using time-resolved spectroscopy
Studies of neurovascular coupling (hemodynamic changes and neuronal activation) in the visual cortex using a timedomain
single photon counting system have been undertaken. The system operates in near infrared (NIR) range of
spectrum and allows functional brain monitoring to be done non-invasively. The detection system employs a
photomultiplier and multi-channel scaler to detect and record emerging photons with sub-microsecond resolution (the
effective collection time per curve point is ~ 200 ns). Localisation of the visual evoked potentials in the brain was done
using knowledge obtained from electroencephalographic (EEG) studies and previous frequency-domain optical NIR
spectroscopic systems. The well-known approach of visual stimulation of the human brain, which consists of an
alternating black and white checkerboard pattern used previously for the EEG study of neural responses, is applied here.
The checkerboard pattern is synchronized with the multi-channel scaler system and allows the analysis of time variation
in back-scattered light, at different stimulation frequencies. Slow hemodynamic changes in the human brain due to Hb-
HbO2 changes in the blood flow were observed, which is evidence of the system’s capability to monitor these changes.
Monocular visual tests were undertaken and compared with those done with an EEG system. In some subjects a fast
optical response on a time scale commensurate with the neural activity associated with the visual cortex was detected.
Future work will concentrate on improved experimental protocols and apparatus to confirm the existence of this
important physiological signal
Quantum interference of single photons from remote nitrogen-vacancy centers in diamond
We demonstrate quantum interference between indistinguishable photons emitted
by two nitrogen-vacancy (NV) centers in distinct diamond samples separated by
two meters. Macroscopic solid immersion lenses are used to enhance photon
collection efficiency. Quantum interference is verified by measuring a value of
the second-order cross-correlation function .
In addition, optical transition frequencies of two separated NV centers are
tuned into resonance with each other by applying external electric fields.
Extension of the present approach to generate entanglement of remote
solid-state qubits is discussed.Comment: 5 pages, 3 figure
Demonstration of Einstein-Podolsky-Rosen Steering Using Hybrid Continuous- and Discrete-Variable Entanglement of Light
Einstein-Podolsky-Rosen steering is known to be a key resource for one-sided
device-independent quantum information protocols. Here we demonstrate steering
using hybrid entanglement between continuous- and discrete-variable optical
qubits. To this end, we report on suitable steering inequalities and detail the
implementation and requirements for this demonstration. Steering is
experimentally certified by observing a violation by more than 5 standard
deviations. Our results illustrate the potential of optical hybrid entanglement
for applications in heterogeneous quantum networks that would interconnect
disparate physical platforms and encodings
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