dedicated to restoring Atlantean Democracy
Competing Memes Propagation on Networks:
A Case Study of Composite Networks
If a false rumor propagates via Twitter, while the truth prop-
agates between friends in Facebook, which one will prevail?
This question captures the essence of the problem we ad-
dress here. We study the intertwined propagation of two
competing “memes” (or viruses, rumors, products etc.) in
a composite network. A key novelty is the use of a com-
posite network, which in its simplest model is deﬁned as a
single set of nodes with two distinct types of edges inter-
connecting them. Each meme spreads across the composite
network in accordance to an SIS-like propagation model (a
ﬂu-like infection-recovery). To study the epidemic behav-
ior of our system, we formulate it as a non-linear dynamic
system (NLDS). We develop a metric for each meme that
is based on the eigenvalue of an appropriately constructed
matrix and argue that this metric plays a key role in de-
termining the “winning” meme. First, we prove that our
metric determines the tipping point at which both memes
become extinct eventually. Second, we conjecture that the
meme with the strongest metric will most likely prevail over
the other, and we show evidence of that via simulations in
both real and synthetic composite networks. Our work is
among the ﬁrst to study the interplay between two compet-
ing memes in composite networks.
Targeting CB2 -GPR55 Receptor Heteromers
Modulates Cancer Cell Signaling
The G protein-coupled receptors CB2
(CB2R) and GPR55 are overexpressed in cancer
cells and human tumors. As a modulation of
GPR55 activity by cannabinoids has been
suggested, we analyzed whether this receptor
participates in cannabinoid effects on cancer
cells. Here, we show that CB2R and GPR55
form heteromers in cancer cells, that these
structures possess unique signaling properties,
and that modulation of these heteromers can
modify the antitumoral activity of cannabinoids
in vivo. These findings unveil the existence of
previously unknown signaling platforms that
help explain the complex behavior of
cannabinoids and may constitute new targets
for therapeutic intervention in oncology.
Bose-Einstein condensation of light in a cavity
The paper considers Bose-Einstein condensation (BEC) of light in a cavity with medium. In the
framework of two-level model we show the eﬀect of gaseous medium on the critical temperature
of light condensation in the system. Transition of the system to the state with released light
condensate is illustrated in consequent stages. Analytical expressions for atypical spatial extent
of the condensed cloud of photons, as well for spectral characteristics of the condensate peak are
derived. Energy and heat capacity of photons as functions of temperature are obtained. Finally, we
demonstrate that the energy of light can be accumulated in the BEC state.
A photon-photon collider in a vacuum hohlraum:
Gamma-ray photon distribution.
Breit-Wheeler positron distribution.
the "annus mirabillis" papers of 1905 by Albert Einstein, proposing "special relativity" and "E=Mc^2"
compiled from the Library of Congress dot gov site: http://www.loc.gov/rr/scitech/SciRefGuides/einstein.html
""Generation of macroscopic singlet states in a cold atomic ensemble""
""We report the generation of a macroscopic singlet state in a cold atomic sample via quantum non-demolition (QND) measurement induced spin squeezing. We observe 3 dB of spin squeezing and detect entanglement of up to 5.5×105 atoms with 5σ statistical significance using a generalized spin squeezing inequality. The degree of squeezing implies at least 50% of the atoms have formed singlets, while the response to a magnetic field gradient indicates entanglement bonds at all length scales, a characteristic of quantum spin liquids.""
- source: http://arxiv.org/abs/1403.1964
QUANTUM FIELD THEORY
Professor John W. Norbury
University of Wisconsin-Milwaukee
P.O. Box 413
Milwaukee, WI 53201
November 20, 2000
v. 3: 30 Nov 1999
String Theory and Noncommutative Geometry
Nathan Seiberg and Edward Witten
School of Natural Sciences
Institute for Advanced Study
OldenLane, Princeton, NJ
Elements of String Theory
Atish Dabholkar, Sunil Mukhi, Spenta Wadia
Coordinators, "Strings 2001"
Tata Institute of Fundamental Research
Homi Bhabha Road, Mumbai, 400 005.
A Neural Conversational Model
In this paper, we show that a simple language model based
on the seq2seq framework can be used to train a conversa-
tional engine. Our modest results show that it can gener-
ate simple and basic conversations, and extract knowledge
from a noisy but open-domain dataset. Even though the
model has obvious limitations, it is surprising to us that a
purely data driven approach without any rules can produce
rather proper answers to many types of questions. How-
ever, the model may require substantial modiﬁcations to be
able to deliver realistic conversations. Amongst the many
limitations, the lack of a coherent personality makes it dif-
ﬁcult for our system to pass the Turing test (Turing, 1950). model.
Translated by G. B. Jeffery, D.Sc.,
and W. Perrett, Ph.D.
Adinkras for Mathematicians
Yan X Zhang
Massachusetts Institute of Technology
November 28, 2011
Adinkras: A Graphical Technology for
Supersymmetric Representation Theory
Department of Physics
Hobart and William Smith College
Geneva, NY14456, USA
S. J. Gates, Jr
Center for String and Particle Theory
Department of Physics, University of Maryland
College Park, MD20742-4111USA
We present a symbolic method for organizing the representation theory
of one-dimensional superalgebras. This relies on special objects, which we
have called adinkra symbols, which supply tangible geometric forms to
the still-emerging mathematical basis underlying supersymmetry.
Earth’s spin axis has been wandering along the Greenwich meridian since about 2000, representing a 75° eastward shift from its long-term drift direction. The past 115 years have seen unequivocal evidence for a quasi-decadal periodicity, and these motions persist throughout the recent record of pole position, in spite of the new drift direction.
We analyze space geodetic and satellite gravimetric data for the period 2003–2015 to show that all of the main features of polar motion are explained by global-scale continent-ocean mass transport. The changes in terrestrial water storage (TWS) and global cryosphere together explain nearly the entire amplitude (83 ± 23%) and mean directional shift (within 5.9° ± 7.6°) of the observed motion. We also find that the TWS variability fully explains the decadal-like changes in polar motion observed during the study period, thus offering a clue to resolving the long-standing quest for determining the origins of decadal oscillations. This newly discovered link between polar motion and global-scale TWS variability has broad implications for the study of past and future climate.
Scanning ultrasound removes amyloid-b and restores memory in an Alzheimer’s disease mouse model
Gerhard Leinenga and Jürgen Götz*
Amyloid-b (Ab) peptide has been implicated in the pathogenesis of Alzheimer’s disease (AD). We present a non-pharmacological approach for removing Ab and restoring memory function in a mouse model of AD in which Ab is deposited in the brain. We used repeated scanning ultrasound (SUS) treatments of the mouse brain to remove Ab, without the need for any additional therapeutic agent such as anti-Ab antibody. Spinning disk confocal microscopy and high-resolution three-dimensional reconstruction revealed extensive internalization of Ab into the lysosomes of activated microglia in mouse brains subjected to SUS, with no concomitant increase observed in the number of microglia. Plaque burden was reduced in SUS-treated AD mice compared to sham-treated animals, and cleared plaques were observed in 75% of SUS-treated mice. Treated AD mice also displayed improved performance on three memory tasks: the Y-maze, the novel object recognition test, and the active place avoidance task. Our findings suggest that repeated SUS is useful for removing Ab in the mouse brain without causing overt damage, and should be explored further as a noninvasive method with therapeutic potential in AD.
Emission of Mitochondrial Biophotons and their Effect on Electrical
Activity of Membrane via Microtubules
In this paper we argue that, in addition to electrical and chemical signals propagating in the
neurons of the brain, signal propagation takes place in the form of biophoton production. This
statement is supported by recent experimental confirmation of photon guiding properties of a
single neuron. We have investigated the interaction of mitochondrial biophotons with
microtubules from a quantum mechanical point of view. Our theoretical analysis indicates
that the interaction of biophotons and microtubules causes transitions/fluctuations of
microtubules between coherent and incoherent states. A significant relationship between the
fluctuation function of microtubules and alpha-EEG diagrams is elaborated on in this paper.
We argue that the role of biophotons in the brain merits special attention.
Keywords: mitochondrial biophoton, microtubule (MT), coherence, fluctuation function