14,861 research outputs found
Lunar analogs of fluvial landscapes - Possible implications, 1 March 1968 - 1 February 1970
Geomorphic approach to possibility of fluid erosion on moo
The Therapeutic Bond Scales: Psychometric Characteristics and Relationship to Treatment Effectiveness
The Therapeutic Bond Scales assess the quality of the therapeutic relationship from the patient\u27s perspective. The therapeutic bond is composed of 3 aspects: working alliance, empathic resonance, and mutual affirmation. Scales were developed to measure these aspects and the therapeutic bond as a whole. The correlations between these scales and 2 measures of outcome (session quality assessed by the patient and termination outcome evaluated by nonparticipant raters) were examined. All scales were significantly correlated with session quality. Therapeutic bond was significantly correlated with termination outcome in both a linear and a curvilinear fashion, suggesting that, at least in the initial phase of therapy, the therapeutic bond can be too high as well as too low
Evaluation of auto regressive integrated moving average (arima) and artificial neural networks (ann) in the prediction of effluent quality of a wastewater treatment system
The main objective of wastewater treatment is to purify the water by degradation of organic matter in the water to anenvironmentally friendly status. To achieve this objective, some effluent (waste water) quality parameters such asChemical oxygen demand (COD) and Biochemical oxygen demand (BOD5) should be measured continuously in orderto meet up with the said objective and regulatory demands. However, through the prediction on water qualityparameters, effective guidance can be provided to comply with such demand without necessarily engaging in rigorouslaboratory analysis. Box-Jenkin’s Auto Regressive Integrated Moving Average (ARIMA) technique is one of the mostrefined extrapolation techniques for prediction while Artificial Neural Network (ANN) is a modern non-linear methodalso used for prediction. The Mean Absolute Error (MAE), Mean Absolute Percentage Error (MAPE), Root MeanSquare Error (RMSE) and Correlation coefficient (r) are used to evaluate the accuracy of the above-mentionedmodels. This paper examined the efficiency of ARIMA and ANN models in prediction of two major water qualityparameters (COD and BOD5) in a wastewater treatment plant. With the aid of R software, it was concluded that in allthe error estimates, ANNs models performed better than the ARIMA model, hence it can be used in the operation ofthe treatment system
Seasonal Movements, Migratory Behavior, and Site Fidelity of West Indian Manatees along the Atlantic Coast of the United States as Determined by Radio-telemetry
The study area encompassed the eastern coasts of Florida, Georgia, and South Carolina,
including inland waterways such as the St. Johns River (Fig. 1). Manatees inhabited the
relatively narrow band of water that lies between the barrier beaches and the mainland,
occasionally venturing into the ocean close to shore. Between Miami and Fernandina Beach,
Florida, 19 inlets provided manatees with corridors between the intracoastal waters and the
Atlantic Ocean; the distance between adjacent inlets averaged 32 km(SD = 24 km) and varied
from 3 to 88 km. Habitats used by manatees along this 900-km stretch ofcoastline varied
widely and included estuaries, lagoons, rivers and creeks, shallow bays and sounds, and ocean
inlets. Salinities in most areas were brackish, but ranged from completely fresh to completely
marine. The predominant communities of aquatic vegetation also varied geographically and
with salinity: seagrass meadows and mangrove swamps in brackish and marine waters along the
southern half of peninsular Florida; salt marshes in northeastern Florida and Georgia; benthic
macroalgae in estuarine and marine habitats; and a variety of submerged, floating, and emergent
vegetation in freshwater rivers, canals, and streams throughout the region.
Radio-telemetry has been used successfully to track manatees in other regions ofFlorida
(Bengtson 1981, Powell and Rathbun 1984, Lefebvre and Frohlich 1986, Rathbun et al. 1990)
and Georgia (Zoodsma 1991), but these early studies relied primarily on conventional VHF (very
high frequency) transmitters and were limited in their spatial and temporal scope (see O'Shea
and Kochman 1990 for overview). Typically, manatees were tagged at a thermal refuge in the
winter and then tracked until the tag detached, usually sometime between the spring and fall of
the same year. Our study differs from previous research on manatee movements in several
important respects. First, we relied heavily on data from satellite-monitored transmitters using
the Argos system, which yielded a substantially greater number of locations and more systematic
collection of data compared to previous VHF tracking studies (Deutsch et al. 1998). Second, our
tagging and tracking efforts encompassed the entire range of manatees along the Atlantic coast,
from the Florida Keys to South Carolina, so inferences were not limited to a small geographic
area. Third, we often used freshwater to lure manatees to capture sites, which allowed tagging
in all months of the year; this provided more information about summer movement patterns than
had previous studies which emphasized capture and tracking at winter aggregations. Finally, the
study spanned a decade, and success in retagging animals and in replacing transmitters allowed
long-term tracking ofmany individuals. This provided the opportunity to investigate variation in
seasonal movements, migratory behavior, and site fidelity across years for individual manatees.
(254 page document.
Phases of the excitonic condensate in two-layer graphene
Two graphene monolayers that are oppositely charged and placed close to each
other are considered. Taking into account valley and spin degeneracy of
electrons we analyze the symmetry of the excitonic insulator states in such a
system and build a phase diagram that takes into account the effect of the
symmetry breaking due to the external in-plane magnetic field and the carrier
density imbalance between the layers.Comment: 12 pages, 6 figures, 1 tabl
A generalized no-broadcasting theorem
We prove a generalized version of the no-broadcasting theorem, applicable to
essentially \emph{any} nonclassical finite-dimensional probabilistic model
satisfying a no-signaling criterion, including ones with ``super-quantum''
correlations. A strengthened version of the quantum no-broadcasting theorem
follows, and its proof is significantly simpler than existing proofs of the
no-broadcasting theorem.Comment: 4 page
Reducing multiphoton ionization in a linearly polarized microwave field by local control
We present a control procedure to reduce the stochastic ionization of
hydrogen atom in a strong microwave field by adding to the original Hamiltonian
a comparatively small control term which might consist of an additional set of
microwave fields. This modification restores select invariant tori in the
dynamics and prevents ionization. We demonstrate the procedure on the
one-dimensional model of microwave ionization.Comment: 8 page
Molecular Model of the Contractile Ring
We present a model for the actin contractile ring of adherent animal cells.
The model suggests that the actin concentration within the ring and
consequently the power that the ring exerts both increase during contraction.
We demonstrate the crucial role of actin polymerization and depolymerization
throughout cytokinesis, and the dominance of viscous dissipation in the
dynamics. The physical origin of two phases in cytokinesis dynamics ("biphasic
cytokinesis") follows from a limitation on the actin density. The model is
consistent with a wide range of measurements of the midzone of dividing animal
cells.Comment: PACS numbers: 87.16.Ka, 87.16.Ac
http://www.ncbi.nlm.nih.gov/pubmed/16197254
http://www.weizmann.ac.il/complex/tlusty/papers/PhysRevLett2005.pd
Two-Loop Polarization Contributions to Radiative-Recoil Corrections to Hyperfine Splitting in Muonium
We calculate radiative-recoil corrections of order
to hyperfine splitting in muonium generated by the
diagrams with electron and muon polarization loops. These corrections are
enhanced by the large logarithm of the electron-muon mass ratio. The leading
logarithm cubed and logarithm squared contributions were obtained a long time
ago. The single-logarithmic and nonlogarithmic contributions calculated here
improve the theory of hyperfine splitting, and affect the value of the
electron-muon mass ratio extracted from the experimental data on the muonium
hyperfine splitting.Comment: 15 pages, 11 figure
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