14,542 research outputs found
Coexistence of full which-path information and interference in Wheelers delayed choice experiment with photons
We present a computer simulation model that is a one-to-one copy of an
experimental realization of Wheeler's delayed choice experiment that employs a
single photon source and a Mach-Zehnder interferometer composed of a 50/50
input beam splitter and a variable output beam splitter with adjustable
reflection coefficient (V. Jacques {\sl et al.}, Phys. Rev. Lett. 100,
220402 (2008)). For , experimentally measured values of the
interference visibility and the path distinguishability , a parameter
quantifying the which-path information WPI, are found to fulfill the
complementary relation , thereby allowing to obtain partial WPI
while keeping interference with limited visibility. The simulation model that
is solely based on experimental facts, that satisfies Einstein's criterion of
local causality and that does not rely on any concept of quantum theory or of
probability theory, reproduces quantitatively the averages calculated from
quantum theory. Our results prove that it is possible to give a particle-only
description of the experiment, that one can have full WPI even if D=0, V=1 and
therefore that the relation cannot be regarded as quantifying
the notion of complementarity.Comment: Physica E, in press; see also http://www.compphys.ne
A Multicolour Photometric Study of the neglected eclipsing binary FT Ursae Majoris
The multicolour photometric observations of the neglected eclipsing binary FT
Ursae Majoris (FT UMa) were obtained in 2010. The 2003 version of
Wilson-Devinney code was used to analyze the light curves in , , and
bands simultaneously. Based on the spectroscopic mass ratio published
by Pribulla et al., it is found that FT UMa is an evolved contact binary with a
contact degree of 15.3%. The low amplitude of light variations,
mag, arises mainly from a moderately low inclination angle of
and almost identical components in size rather than the light dilution of a
third component, which contributes light of only Comment: 5 pages, 2 figure
4,4β²-{[1,1β²-MethylΒenebis(naphthalene-2,1-diΒyl)]bisΒ(ΒoxymethylΒene)}diΒbenzoΒnitrile
There are two independent molΒecules in the asymmetric unit of the title compound, C37H26N2O2. The crystal structure is stabilized by a weak intraΒmolecular hydrogen bond as well as CβHβ―Ο interΒactions
Efficient Privacy Preserving Viola-Jones Type Object Detection via Random Base Image Representation
A cloud server spent a lot of time, energy and money to train a Viola-Jones
type object detector with high accuracy. Clients can upload their photos to the
cloud server to find objects. However, the client does not want the leakage of
the content of his/her photos. In the meanwhile, the cloud server is also
reluctant to leak any parameters of the trained object detectors. 10 years ago,
Avidan & Butman introduced Blind Vision, which is a method for securely
evaluating a Viola-Jones type object detector. Blind Vision uses standard
cryptographic tools and is painfully slow to compute, taking a couple of hours
to scan a single image. The purpose of this work is to explore an efficient
method that can speed up the process. We propose the Random Base Image (RBI)
Representation. The original image is divided into random base images. Only the
base images are submitted randomly to the cloud server. Thus, the content of
the image can not be leaked. In the meanwhile, a random vector and the secure
Millionaire protocol are leveraged to protect the parameters of the trained
object detector. The RBI makes the integral-image enable again for the great
acceleration. The experimental results reveal that our method can retain the
detection accuracy of that of the plain vision algorithm and is significantly
faster than the traditional blind vision, with only a very low probability of
the information leakage theoretically.Comment: 6 pages, 3 figures, To appear in the proceedings of the IEEE
International Conference on Multimedia and Expo (ICME), Jul 10, 2017 - Jul
14, 2017, Hong Kong, Hong Kon
A simple approach to synthesize novel sulfur/graphene oxide/multiwalled carbon nanotube composite cathode for high performance lithium/sulfur batteries
A sulfur/graphene oxide/multiwalled carbon nanotube
(S/GO/MWNT) composite was synthesized via a simple
ultrasonic mixing method followed by heat treatment. By taking
advantage of this solution-based self-assembly synthesis
route, poisonous and noxious reagents and complicated fabrication
processes are rendered unnecessary, thereby simplifying
its manufacturing and decreasing the cost of the final
product. Transmission and scanning electronic microscopy
observations indicated the formation of the threedimensional
interconnected S/GO/MWNTcomposite through
the environmentally friendly process..
First photometric study of the eclipsing binary PS Persei
The CCD photometric observations of the eclipsing binary PS Persei (PS Per)
were obtained on two consecutive days in 2009. The 2003 version Wilson-Devinney
code was used to analyze the first complete light curves in and bands.
It is found that PS Per is a short-period Algol-type binary with the less
massive component accurately filling its inner critical Roche lobe. The mass
ratio of and the orbital inclination of are
obtained. On the other hand, based on all available times of primary light
minimum including two new ones, the orbital period has been improved.Comment: 7 pages, 4 figure
- β¦