2,196 research outputs found
Global Monetarism and the Monetary Approach to the Balance of Payments
macroeconomics, global monetarism, monetary approach, balance of payments
Centrifuge Modeling of a Tilting Wall with Liquefiable Backfill
A series of dynamic centrifuge tests was carried out to simulate the seismic behaviors of an idealized model retaining wall and the liquefiable backfill supported by the wall. The wall is hinged at the base and is supported near the top by an anchor with finite strength. Eighteen tests with various peak accelerations were applied to six saturated sand models prepared at two relative densities and with two pore fluid viscosities. Permanent tilt in the wall as a result of temporary failure of the anchor occurred in some tests. Results from tests without anchor failures were used to form a model for estimating the amount of permanent tilt in the wall
Split graphs and Block Representations
In this paper, we study split graphs and related classes of graphs from the
perspective of their sequence of vertex degrees and an associated lattice under
majorization. Following the work of Merris in 2003, we define blocks
, where is the degree sequence of a graph, and
and are sequences arising from . We use the
block representation to characterize membership in
each of the following classes: unbalanced split graphs, balanced split graphs,
pseudo-split graphs, and three kinds of Nordhaus-Gaddum graphs (defined by
Collins and Trenk in 2013). As in Merris' work, we form a poset under the
relation majorization in which the elements are the blocks
representing split graphs with a fixed number of
edges. We partition this poset in several interesting ways using what we call
amphoras, and prove upward and downward closure results for blocks arising from
different families of graphs. Finally, we show that the poset becomes a lattice
when a maximum and minimum element are added, and we prove properties of the
meet and join of two blocks.Comment: 23 pages, 7 Figures, 2 Table
Speech Communication
Contains reports on two research projects.National Institutes of Health (Grant MH-04737-03)National Science Foundation (Grant G-16526)National Aeronautics and Space Administration (Grant NsG-496)United States Air Force, Electronic Systems Division (Contract AF19(604)-6102
Особливості процесу сепаратизації в Україні
Вітман К. М. Особливості процесу сепаратизації в Україні / К. М. Вітман // Актуальні проблеми політики : зб. наук. пр. / редкол.: С. В. Ківалов (голов. ред.), Л. І. Кормич (заст. голов. ред.), М. А. Польовий [та ін.] ; НУ «ОЮА», Південноукраїнський центр гендерних проблем. – Одеса : Фенікс, 2014. – Вип. 53. – С. 19-28.Досліджуються витоки, причини та особливості процесу сепаратизації
в Україні. Аналізуються основні механізми протидії феномену на предмет ефективності, демократичності та можливих етнополітичних
наслідків.Исследуются истоки, причины и особенности процесса сепаратизации
в Украине. Анализируются основные механизмы противодействия феномену
на предмет эффективности, демократичности и возможных этнополитических последствий.The background, reasons, main features of separatization process in Ukraine
are studied. The main instruments of combating phenomenon are analyzed for
the purpose of effectiveness, correspondence with democracy and possible ethnopolitical consequences
Settlement of larvae from four families of corals in response to a crustose coralline alga and its biochemical morphogens
Healthy benthic substrates that induce coral larvae to settle are necessary for coral recovery. Yet, the biochemical cues required to induce coral settlement have not been identified for many taxa. Here we tested the ability of the crustose coralline alga (CCA) Porolithon onkodes to induce attachment and metamorphosis, collectively termed settlement, of larvae from 15 ecologically important coral species from the families Acroporidae, Merulinidae, Poritidae, and Diploastreidae. Live CCA fragments, ethanol extracts, and hot aqueous extracts of P. onkodes induced settlement (>10%) for 11, 7, and 6 coral species, respectively. Live CCA fragments were the most effective inducer, achieving over 50% settlement for nine species. The strongest settlement responses were observed in Acropora spp.; the only non-acroporid species that settled over 50% were Diploastrea heliopora, Goniastrea retiformis, and Dipsastraea pallida. Larval settlement was reduced in treatments with chemical extracts compared with live CCA, although high settlement (>50%) was reported for six acroporid species in response to ethanol extracts of CCA. All experimental treatments failed (< 10%) to induce settlement in Montipora aequituberculata, Mycedium elephantotus, and Porites cylindrica. Individual species responded heterogeneously to all treatments, suggesting that none of the cues represent a universal settlement inducer. These results challenge the commonly-held notion that CCA ubiquitously induces coral settlement, and emphasize the critical need to assess additional cues to identify natural settlement inducers for a broad range of coral taxa
Atomic Scale Memory at a Silicon Surface
The limits of pushing storage density to the atomic scale are explored with a
memory that stores a bit by the presence or absence of one silicon atom. These
atoms are positioned at lattice sites along self-assembled tracks with a pitch
of 5 atom rows. The writing process involves removal of Si atoms with the tip
of a scanning tunneling microscope. The memory can be reformatted by controlled
deposition of silicon. The constraints on speed and reliability are compared
with data storage in magnetic hard disks and DNA.Comment: 13 pages, 5 figures, accepted by Nanotechnolog
Sentencing Outcomes of Convicted Child Sex Offenders
This research examines the sentencing outcomes of convicted child sexual offenders from data collected over an eight year period. Multiple regression and nominal log linear regression are used to examine length of prison sentence, length of probation sentence, and whether or not the convicted offender is actually sent to prison or to probation. While many independent variables appear to be related to sentence outcome, they fall into three categories: characteristics of the offender, characteristics of the victim, and characteristics of the crime. Additionally, while many variables appear related at the bivariate level, when multivariate analysis is applied, fewer variables remain significant and these are mostly from the characteristics of the offense
A Richness Study of 14 Distant X-ray Clusters From the 160 Square Degree Survey
We have measured the surface density of galaxies toward 14 X-ray-selected
cluster candidates at redshifts greater than z=0.46, and we show that they are
associated with rich galaxy concentrations. We find that the clusters range
between Abell richness classes 0-2, and have a most probable richness class of
one. We compare the richness distribution of our distant clusters to those for
three samples of nearby clusters with similar X-ray luminosities. We find that
the nearby and distant samples have similar richness distributions, which shows
that clusters have apparently not evolved substantially in richness since
redshift z =0.5. We compare the distribution of distant X-ray clusters in the
L_x--richness plane to the distribution of optically-selected clusters from the
Palomar Distant Cluster Survey. The optically-selected clusters appear overly
rich for their X-ray luminosities when compared to X-ray-selected clusters.
Apparently, X-ray and optical surveys do not necessarily sample identical mass
concentrations at large redshifts. This may indicate the existence of a
population of optically rich clusters with anomalously low X-ray emission. More
likely, however, it reflects the tendency for optical surveys to select
unvirialized mass concentrations, as might be expected when peering along
large-scale filaments.Comment: The abstract has been abridged. Accepted for publication in the
Astrophysical Journa
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