3,636 research outputs found
Complexity Measures of Music
We present a technique to search for the presence of crucial events in music,
based on the analysis of the music volume. Earlier work on this issue was based
on the assumption that crucial events correspond to the change of music notes,
with the interesting result that the complexity index of the crucial events is
mu ~ 2, which is the same inverse power-law index of the dynamics of the brain.
The search technique analyzes music volume and confirms the results of the
earlier work, thereby contributing to the explanation as to why the brain is
sensitive to music, through the phenomenon of complexity matching. Complexity
matching has recently been interpreted as the transfer of multifractality from
one complex network to another. For this reason we also examine the
mulifractality of music, with the observation that the multifractal spectrum of
a computer performance is significantly narrower than the multifractal spectrum
of a human performance of the same musical score. We conjecture that although
crucial events are demonstrably important for information transmission, they
alone are not suficient to define musicality, which is more adequately measured
by the multifractality spectrum
Light flash phenomena induced by HzE particles
Astronauts and Apollo and Skylab missions have reported observing a variety of visual phenomena when their eyes are closed and adapted to darkness. These phenomena have been collectively labelled as light flashes. Visual phenomena which are similar in appearance to those observed in space have been demonstrated at the number of accelerator facilities by expressing the eyes of human subjects to beams of various types of radiation. In some laboratory experiments Cerenkov radiation was found to be the basis for the flashes observed while in other experiments Cerenkov radiation could apparently be ruled out. Experiments that differentiate between Cerenkov radiation and other possible mechanisms for inducing visual phenomena was then compared. The phenomena obtained in the presence and absence of Cerenkov radiation were designed and conducted. A new mechanism proposed to explain the visual phenomena observed by Skylab astronauts as they passed through the South Atlantic Anomaly, namely nuclear interactions in and near the sensitive layer of the retina, is covered. Also some studies to search for similar transient effects of space radiation on sensors and microcomputer memories are described
Effects of the Degree and Type of Sizing on the Dyeing of Paper
A study was made comparing papers dyed in a rosin/alum sized system to papers dyed in two alkaline sized systems. The alkaline sizes chosen were alkyl ketene dimer and alkenyl succinic anhydride. The dye types studied were acid, basic, anionic direct, and cationic direct. The degree of sizing was varied for each sizing type to see if the amount of sizing would effect dye retention. The papers dyed with anionic and cationic direct dyes and the basic dye were not significantly effected by sizing type of sizing degree. The direct dyes did give a lighter shade when the rosin size was used. The acid dye was the only dye type that was effected by sizing degree. For all three sizings, the color of the acid dye became darker with increased sizing. Unexpectedly, the acid dye was retained when alkyl ketene dimer was used as a sizing, even without the aid of a mordant
Longwall shearer tracking system
A tracking system for measuring and recording the movements of a longwall shearer vehicle includes an optical tracking assembly carried at one end of a desired vehicle path and a retroreflector assembly carried by the vehicle. Continuous horizontal and vertical light beams are alternately transmitted by means of a rotating Dove prism to the reflector assembly. A vertically reciprocating reflector interrupts the continuous light beams and converts these to discrete horizontal and vertical light beam images transmitted at spaced intervals along the path. A second rotating Dove prism rotates the vertical images to convert them to a second series of horizontal images while the first mentioned horizontal images are left unrotated and horizontal. The images are recorded on a film
Architectural assessment of mass storage systems at GSFC
The topics are presented in viewgraph form and include the following: system functionality; characteristics; data sources; hardware/software systems; and performance assessments
Reducing Crop Nutrient Applications: The Yield Reserve Program
A proposed Yield Reserve Program designed to compensate farmers for any reduced yields resulting from reduced nitrogen (N) application rates below recommended rates is evaluated. Assuming that farmers currently follow extension recommendations for applying N, Yield Reserve Program participation reduces expected net revenue by 13/ha. The Yield Reserve Program reduces expected net revenue by 20/ha for farmers who apply N to maximize expected net revenue. Farmers costs of participation increase with lower probabilities of inadequate rainfall and higher corn prices and decline with higher N prices. The Yield Reserve Program can significantly reduce N applications to cropland, which may reduce N content of surface waters, but the costs to taxpayers and farmers will depend on how the program is implemented.compliance cost, nitrogen fertilizer, nonpoint source pollution, policy, yield response function, Crop Production/Industries,
Summer Therapy and Coaching Resource Notebook
This project aims to fulfill the need for an easily accessible and well-organized resource notebook for summer Educational Therapy and Academic Coaching that our organization has talked about doing for some time now but has always lacked the manpower to make happen. I desire to have this be a stepping stone towards offering a valuable, well-defined service for our administration to offer to our students and families in the future.
This approach will address the frustration of having data and information scattered between our three schools, departments, and people. It will also take current resources, information, and opinions from other educational therapists and academic coaches and combine them with my newly acquired information to finally have a tangible and accessible program to use moving forward next summer.
This project also gave me the ability to highlight and utilize the leadership and conflict management skills I have acquired during my last two years at Boise State University. I chose a project that highlighted the skills I already possess: communication, leadership, organization, active listening, problem-solving, etc
COST EFFECTIVENESS OF NUTRIENT MANAGEMENT AND BUFFERS: COMPARISONS OF FOUR SPATIAL SCENARIOS
Policymakers are seeking cost effective methods to reduce nutrient pollution from agriculture. Predicted costs and pollution reductions from nutrient management and buffers are evaluated under four spatial scenarios describing a watershed. Results will help policymakers evaluate alternative Best Management Practices (BMPs) for water quality protection in agriculture.Environmental Economics and Policy,
Reaching Approximate Byzantine Consensus with Multi-hop Communication
We address the problem of reaching consensus in the presence of Byzantine
faults. In particular, we are interested in investigating the impact of
messages relay on the network connectivity for a correct iterative approximate
Byzantine consensus algorithm to exist. The network is modeled by a simple
directed graph. We assume a node can send messages to another node that is up
to hops away via forwarding by the intermediate nodes on the routes, where
is a natural number. We characterize the necessary and
sufficient topological conditions on the network structure. The tight
conditions we found are consistent with the tight conditions identified for
, where only local communication is allowed, and are strictly weaker for
. Let denote the length of a longest path in the given network. For
and undirected graphs, our conditions hold if and only if and the node-connectivity of the given graph is at least , where
is the total number of nodes and is the maximal number of Byzantine
nodes; and for and directed graphs, our conditions is equivalent to
the tight condition found for exact Byzantine consensus.
Our sufficiency is shown by constructing a correct algorithm, wherein the
trim function is constructed based on investigating a newly introduced minimal
messages cover property. The trim function proposed also works over
multi-graphs.Comment: 24 pages, 1 figure. arXiv admin note: text overlap with
arXiv:1203.188
A 33 year constancy of the X-ray coronae of AR Lac and eclipse diagnosis of scale height
Extensive X-ray and extreme ultraviolet (EUV) photometric observations of the
eclipsing RS CVn system AR Lac were obtained over the years 1997 to 2013 with
the Chandra X-ray Observatory Extreme Ultraviolet Explorer. During primary
eclipse, HRC count rates decrease by ~40%. A similar minimum is seen during one
primary eclipse observed by EUVE but not in others owing to intrinsic source
variability. Little evidence for secondary eclipses is present in either the
X-ray or EUV data, reminiscent of earlier X-ray and EUV observations. Primary
eclipses allow us to estimate the extent of a spherically symmetric corona on
the primary G star of about 1.3Rsun, or 0.86Rstar, and indicate the G star is
likely brighter than the K component by a factor of 2-5. Brightness changes not
attributable to eclipses appear to be dominated by stochastic variability and
are generally non-repeating. X-ray and EUV light curves cannot therefore be
reliably used to reconstruct the spatial distribution of emission assuming only
eclipses and rotational modulation are at work. Moderate flaring is observed,
where count rates increase by up to a factor of three above quiescence.
Combined with older ASCA, Einstein, EXOSAT, ROSAT and Beppo-SAX observations,
the data show that the level of quiescent coronal emission at X-ray wavelengths
has remained remarkably constant over 33 years, with no sign of variation due
to magnetic cycles. Variations in base level X-ray emission seen by Chandra
over 13 years are only ~10%, while variations back to pioneering Einstein
observations in 1980 amount to a maximum of 45% and more typically about 15%.Comment: To appear in the Astrophysical Journa
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