Evaluation of multiple-alternative prompts during tact training

2016 ◽  
Vol 49 (2) ◽  
pp. 399-404 ◽  
Author(s):  
Justin B. Leaf ◽  
Donna Townley-Cochran ◽  
Erin Mitchell ◽  
Christine Milne ◽  
Aditt Alcalay ◽  
...  
Keyword(s):  
Multiple Alternative ◽  
Tact Training

Kinetic Control of Interpenetration in Fe-Biphenyl-4,4′-dicarboxylate MOFs by Coordination and Oxidation Modulation

2018 ◽  
Author(s):  
Dominic Bara ◽  
Claire Wilson ◽  
Max Mörtel ◽  
Marat M. Khusniyarov ◽  
ben slater ◽  
...  
Keyword(s):  
Self Assembly ◽  
Surface Areas ◽  
Metal Precursors ◽  
Additional Coordination ◽  
Fine Control ◽  
Multiple Alternative ◽  
Metal Organic ◽  
Dft Simulations ◽  
High Valent ◽  
And Control

Phase control in the self-assembly of metal-organic frameworks (MOFs) – materials wherein organic ligands connect metal ions or clusters into network solids with potential porosity – is often a case of trial and error. Judicious control over a number of synthetic variables is required to select for the desired topology and control features such as interpenetration and defectivity, which have significant impact on physical properties and application. Herein, we present a comprehensive investigation of self-assembly in the Fe-biphenyl-4,4'-dicarboxylate system, demonstrating that coordination modulation, the addition of competing ligands into solvothermal syntheses, can reliably tune between the kinetic product, non-interpenetrated MIL-88D(Fe), and the thermodynamic product, two-fold interpenetrated MIL-126(Fe). DFT simulations reveal that correlated disorder of the terminal anions on the metal clusters in the interpentrated phase results in H-bonding between adjacent nets and is the thermodynamic driving force for its formation. Coordination modulation slows self-assembly and therefore selects the thermodynamic product MIL-126(Fe), while offering fine control over defectivity, inducing mesoporosity, but electron microscopy shows the MIL-88D(Fe) phase persists in many samples despite not being evident in diffraction experiments, suggesting its presence accounts for the lower than predicted surface areas reported for samples to date. Interpenetration control is also demonstrated by utilizing the 2,2'-bipyridine-5,5'-dicarboxylate linker; DFT simulations show that it is energetically prohibitive for it to adopt the twisted conformation required to form the interpenetrated phase, and are confirmed by experimental data, although multiple alternative phases are identified due to additional coordination of the Fe cations to the N-donors of the ligand. Finally, we introduce oxidation modulation – the concept of using metal precursors in a different oxidation state to that found in the final MOF – as a further protocol to kinetically control self-assembly. Combining coordination and oxidation modulation allows the synthesis of pristine MIL-126(Fe) with BET surface areas close to the predicted maximum capacity for the first time, suggesting that combining the two may be a powerful methodology for the controlled self-assembly of high-valent MOFs.<br><br>

Cost-Sensitive Probabilistic Contingent Planning for Web Service Composition

2016 ◽  
Vol 25 (01) ◽  
pp. 1660001 ◽  
Author(s):  
George Markou ◽  
Ioannis Refanidis
Keyword(s):  
Web Service ◽  
Service Composition ◽  
Original Problem ◽  
Web Service Composition ◽  
Semantic Web Service ◽  
Planning Approach ◽  
Merging Process ◽  
Multiple Alternative ◽  
Semantic Web Service Composition ◽  
Contingent Planning

This article presents a cost sensitive probabilistic contingent planning approach for automated semantic web service composition, under the assumptions that the execution of each web service incurs some cost; its alternative outcomes along with their probabilities of occurring are known in advance; and actions do not involve delete effects. The implemented planner, MAPPPA2, produces a contingent plan in the form of a decision tree, by integrating multiple alternative deterministic plans computed by solving a determinized version of the original problem. Both the generation of the alternative deterministic plans, as well as the merging process attempt to maximize the expected utility of the final contingent plan. The article presents evaluation results regarding the approach, based on three web service composition domains.

scholarly journals Multi-modal signal evolution in birds: re-examining a standard proxy for sexual selection

2018 ◽  
Vol 285 (1889) ◽  
pp. 20181557 ◽  
Author(s):  
Christopher R. Cooney ◽  
Hannah E. A. MacGregor ◽  
Nathalie Seddon ◽  
Joseph A. Tobias
Keyword(s):  
Sexual Selection ◽  
Interspecific Interactions ◽  
Habitat Type ◽  
Negative Relationship ◽  
Key Factors ◽  
Phenotypic Data ◽  
Species Pairs ◽  
Multiple Alternative ◽  
Mating Signal ◽  
Diversification Hypothesis

Sexual selection is proposed to be an important driver of speciation and phenotypic diversification in animal systems. However, previous phylogenetic tests have produced conflicting results, perhaps because they have focused on a single signalling modality (visual ornaments), whereas sexual selection may act on alternative signalling modalities (e.g. acoustic ornaments). Here, we compile phenotypic data from 259 avian sister species pairs to assess the relationship between visible plumage dichromatism—a standard index of sexual selection in birds—and macroevolutionary divergence in the other major avian signalling modality: song. We find evidence for a strong negative relationship between the degree of plumage dichromatism and divergence in song traits, which remains significant even when accounting for other key factors, including habitat type, ecological divergence and interspecific interactions. This negative relationship is opposite to the pattern expected by a straightforward interpretation of the sexual selection–diversification hypothesis, whereby higher levels of dichromatism indicating strong sexual selection should be related to greater levels of mating signal divergence regardless of signalling modality. Our findings imply a ‘trade-off’ between the elaboration of visual ornaments and the diversification of acoustic mating signals, and suggest that the effects of sexual selection on diversification can only be determined by considering multiple alternative signalling modalities.

scholarly journals Geometry of Multiprimary Display Colors II: Metameric Control Sets and Gamut Tiling Color Control Functions

2021 ◽  
Author(s):  
Carlos Rodriguez-Pardo ◽  
Gaurav Sharma
Keyword(s):  
Broad Class ◽  
Convex Polytope ◽  
Building Blocks ◽  
Complete Characterization ◽  
Mathematical Framework ◽  
Control Functions ◽  
Control Sets ◽  
Multiple Alternative ◽  
Color Control

<div>For multiprimary displays that have four or more primaries, a color may be reproduced using multiple alternative control vectors. We provide a complete characterization of the Metameric Control Set (MCS), i.e., the set of control vectors that reproduce a given color on the display. Specifically, we show that MCS is a convex polytope whose vertices are control vectors obtained from (parallelepiped) tilings of the gamut, i.e., the range of colors that the display can produce. The mathematical framework that we develop: (a) characterizes gamut tilings in terms of fundamental building blocks called facet spans, (b) establishes that the vertices of the MCS are fully characterized by the tilings of the gamut, and (c) introduces a methodology for the efficient enumeration of gamut tilings. The framework reveals the fundamental inter-relations between the geometry of the MCS and the geometry of the gamut developed in a companion Part I paper, and provides insight into alternative strategies for color control. Our characterization of tilings and the strategy for their enumeration also advance knowledge in geometry, providing new approaches and computational results for the enumeration of tilings for a broad class of zonotopes in R<sup>3</sup>.</div>

scholarly journals The corporate takeover of the online public sphere: A critical examination, with reference to 'the New Zealand case'

2005 ◽  
Vol 11 (1) ◽  
pp. 90-112 ◽  
Author(s):  
Lincoln Dahlberg
Keyword(s):  
New Zealand ◽  
Mass Media ◽  
Public Sphere ◽  
Critical Examination ◽  
The Internet ◽  
The Public ◽  
Multiple Alternative ◽  
The Public Sphere ◽  
The One ◽  
And Control

Much communications research is in agreement about the failure of mass media to adequately facilitate a public sphere of open and reflexive debate necessary for strong democratic culture. In contrast , the internet's decentralised, two-way communication is seen by many commentators to be extending such debate. However, there is some ambivalence among critical theorists as to the future role of the internet in advancing the public sphere. On the one hand, the internet is providing the means fot the voicing of positions and identities excluded from the mass media. On the other hand, a number of problem are limiting the extensiveness and effetivness of this voicing. One of the most significant problems is the corporate colonisation of cyberspace, and subsequent marginalisation rational-critical communication. It is this problem that i will focus on in this article, with reference to examples from what I refer to as the 'New Zealand online public sphere'. I show how online corporate portals and media sites are gaining the most attention orientated to public communication, including news, information, and discussion. These sites generally support conservative discourse and consumer practices. The result is a marginalisation online of the very voices marginalised offline, and also of the critical-reflexive form of communication that makes for a strong public sphere. I conclude by noting that corporate colonisation is as yet only partial, and control of attention and media is highly contested by multiple 'alternative' discursive spaces online.

scholarly journals Pre-print #3

2018 ◽  
Author(s):  
D. Samuel Schwarzkopf ◽  
Nonie J Finlayson ◽  
Benjamin de Haas
Keyword(s):  
Response Bias ◽  
Forced Choice ◽  
Perceptual Bias ◽  
Confounding Factors ◽  
Decision Criteria ◽  
Response Modality ◽  
Multiple Alternative ◽  
The Mean ◽  
Response Biases ◽  
Perceptual Factors

Perceptual bias is inherent to all our senses, particularly in the form of visual illusionsand aftereffects. However, many experiments measuring perceptual biases may besusceptible to non-perceptual factors, such as response bias and decision criteria. Here wequantify how robust Multiple Alternative Perceptual Search (MAPS) is for disentanglingestimates of perceptual biases from these confounding factors. First our results show thatwhile there are considerable response biases in our four-alternative forced choice design,these are unrelated to perceptual biases estimates, and these response biases are notproduced by the response modality (keyboard versus mouse). We also show that perceptualbias estimates are reduced when feedback is given on each trial, likely due to feedbackenabling observers to partially (and actively) correct for perceptual biases. However, thisdoes not impact the reliability with which MAPS detects the presence of perceptual biases.Finally, our results show that MAPS can detect actual perceptual biases and is not adecisional bias towards choosing the target in the middle of the candidate stimulusdistribution. In summary, researchers conducting a MAPS experiment should use a constantreference stimulus, but consider varying the mean of the candidate distribution. Ideally,they should not employ trial-wise feedback if the magnitude of perceptual biases is ofinterest.

scholarly journals The crisis in economics – nature and ways to overcome it

2019 ◽  
Vol 89 (1) ◽  
pp. 24-37
Author(s):  
A. D. Nekipelov
Keyword(s):  
Economic Theory ◽  
Economic System ◽  
Economic Crisis ◽  
Economic Science ◽  
Mainstream Economic ◽  
Pure Science ◽  
Economic Problems ◽  
Neoclassical Economic Theory ◽  
Multiple Alternative ◽  
Alternative Approaches

Recent decades have witnessed an upsurge in multiple alternative approaches to unraveling major economic problems, together with the mainstream economic theory, which in this study has been considered an indicator of economic crisis. In this study, we attribute institutional stasis, as well as methodological heterogeneity of its two constituent sections, micro- and macroeconomics, to the primary drawbacks of neoclassical economic theory. Overcoming the crisis of economic science correlates with the creation of a general economic theory on the principles of “pure science,” with elucidated functions of various socioeconomic disciplines. If “pure economic theory” intends to form an intellectual layout of the economic system, then the “realistic sciences,” also including modern macroeconomics in this study, are tools for analyzing specific socioeconomic phenomena and processes. As people with consciousness and interests act in the society, this study postulates the existence of a certain zone of ambiguity, which cannot be entirely covered.

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