scholarly journals Research on Trust Propagation Models in Reputation Management Systems

2014 ◽  
Vol 2014 ◽  
pp. 1-16 ◽  
Author(s):  
Zhiyuan Su ◽  
Mingchu Li ◽  
Xinxin Fan ◽  
Xing Jin ◽  
Zhen Wang
Keyword(s):  
Past History ◽  
Three Dimensions ◽  
Reputation Management ◽  
Reputation Systems ◽  
Propagation Models ◽  
Trust Propagation ◽  
Critical Measure ◽  
Media Systems ◽  
Remote Past

Feedback based reputation systems continue to gain popularity in eCommerce and social media systems today and reputation management in large social networks needs to manage cold start and sparseness in terms of feedback. Trust propagation has been widely recognized as an effective mechanism to handle these problems. In this paper we study the characterization of trust propagation models in the context of attack resilience. We characterize trust propagation models along three dimensions: (i) uniform propagation and conditional propagation, (ii) jump strategies for breaking unwanted cliques, and (iii) decay factors for differentiating recent trust history from remote past history. We formally and experimentally show that feedback similarity is a critical measure for countering colluding attacks in reputation systems. Without feedback similarity guided control, trust propagations are vulnerable to different types of colluding attacks.

convergent-beam diffraction from surfaces

1987 ◽  
Vol 45 ◽  
pp. 30-33
Author(s):  
J. A. Eades ◽  
A. E. Smith ◽  
D. F. Lynch
Keyword(s):  
Reciprocal Lattice ◽  
Three Dimensional ◽  
Grazing Incidence ◽  
Three Dimensions ◽  
Plane Figure ◽  
Transmission Electron ◽  
Convergent Beam ◽  
Beam Patterns ◽  
Beam Diffraction

It is quite simple (in the transmission electron microscope) to obtain convergent-beam patterns from the surface of a bulk crystal. The beam is focussed onto the surface at near grazing incidence (figure 1) and if the surface is flat the appropriate pattern is obtained in the diffraction plane (figure 2). Such patterns are potentially valuable for the characterization of surfaces just as normal convergent-beam patterns are valuable for the characterization of crystals.There are, however, several important ways in which reflection diffraction from surfaces differs from the more familiar electron diffraction in transmission.GeometryIn reflection diffraction, because of the surface, it is not possible to describe the specimen as periodic in three dimensions, nor is it possible to associate diffraction with a conventional three-dimensional reciprocal lattice.

scholarly journals I’m Every Woman: Advancing the Intersectional Leadership of Black Women School Leaders as Anti-Racist Praxis

2021 ◽  
Vol 31 (1-2) ◽  
pp. 7-28
Author(s):  
April L. Peters ◽  
Angel Miles Nash
Keyword(s):  
Black Women ◽  
The United States ◽  
Women's Leadership ◽  
Three Dimensions ◽  
Race And Gender ◽  
Leadership Framework ◽  
And Gender ◽  
Resisting Oppression ◽  
Epistemological Basis

The rallying, clarion call to #SayHerName has prompted the United States to intentionally include the lives, voices, struggles, and contributions of Black women and countless others of her ilk who have suffered and strived in the midst of anti-Black racism. To advance a leadership framework that is rooted in the historicity of brilliance embodied in Black women’s educational leadership, and their proclivity for resisting oppression, we expand on intersectional leadership. We develop this expansion along three dimensions of research centering Black women’s leadership: the historical foundation of Black women’s leadership in schools and communities, the epistemological basis of Black women’s racialized and gendered experiences, and the ontological characterization of Black women’s expertise in resisting anti-Black racism in educational settings. We conclude with a four tenet articulation detailing how intersectional leadership: (a) is explicitly anti-racist; (b) is explicitly anti-sexist; (c) explicitly acknowledges the multiplicative influences of marginalization centering race and gender, and across planes of identity; and (d) explicitly leverages authority to serve and protect historically underserved communities.

scholarly journals Structural and chemical characterization of MoO2/MoS2 triple-hybrid materials using electron microscopy in up to three dimensions

2021 ◽  
Author(s):  
Anna Frank ◽  
Thomas Gänsler ◽  
Stefan Hieke ◽  
Simon Fleischmann ◽  
Samantha Husmann ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Chemical Characterization ◽  
Three Dimensions ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Microscopy Investigation ◽  
Electron Microscopy Investigation ◽  
Carbon Nanotube Network ◽  
Core Shell Nanoparticles

This work presents the synthesis of MoO2/MoS2 core/shell nanoparticles within a carbon nanotube network and their detailed electron microscopy investigation in up to three dimensions. The triple-hybrid core/shell material was...

Towards 3D image-based nanocrystallography by means of transmission electron goniometry

2004 ◽  
Vol 839 ◽  
Author(s):  
Peter Moeck ◽  
Wentao Qin ◽  
Philip B. Fraundorf
Keyword(s):  
Lattice Structure ◽  
Three Dimensions ◽  
Structural Defects ◽  
Transmission Electron ◽  
Means Of Transmission ◽  
Z Contrast ◽  
Individual Nanoparticles ◽  
Nanocrystal Model ◽  
The Ideal

ABSTRACTIt is well known that the crystallographic phase and morphology of many materials changes with the crystal size in the tens of nanometer range and that many nanocrystals possess structural defects in excess of their equilibrium levels. A need to determine the ideal and real structure of individual nanoparticles, therefore, arises. High-resolution phase-contrast transmission electron microscopy (TEM) and atomic resolution Z-contrast scanning TEM (STEM) when combined with transmission electron goniometry offer the opportunity of develop dedicated methods for the crystallographic characterization of nanoparticles in three dimensions. This paper describes tilt strategies for taking data from individual nanocrystals “as found”, so as to provide information on their lattice structure and orientation, as well as on the structure and orientation of their surfaces and structural defects. Internet based java applets that facilitate the application of this technique for cubic crystals with calibrated tilt-rotation and double-tilt holders are mentioned briefly. The enhanced viability of image-based nanocrystallography in future aberration-corrected TEMs and STEMs is illustrated on a nanocrystal model system.

scholarly journals METHODOLOGY FOR ECONOMIC EVALUATION OF WATER MANAGAMENT

2012 ◽  
Vol 1 (8) ◽  
Author(s):  
Mesud Adžemović ◽  
Mirjana Bartula ◽  
Jordan Aleksić
Keyword(s):  
Water Resources ◽  
Economic Analysis ◽  
River Basin ◽  
Water Status ◽  
Cost Benefit ◽  
Three Dimensions ◽  
Water Services ◽  
Cost Distribution ◽  
Basin Area

Economic analysis is the key requirement of EU Water Framework Directive. On a level of river basin area, economic analysis includes three dimensions: 1. economic characterization of water use: current and future projected economic importance of capacities and potentials of water resources; 2. program of measures for achieving good water status: cost-benefit analyses, cost efficiency analyses, cost scale and influence: and 3. water services price policies: evaluation of institutional alternatives for recovery of water services costs, including analysis of cost distribution. The analysis includes leveling of current and projected water resources data with costs and benefits of water services on the level of river basin area within local communities and integrated on sub-region level.

Local bond order parameters for accurate determination of crystal structures in two and three dimensions

2018 ◽  
Vol 20 (42) ◽  
pp. 27059-27068 ◽  
Author(s):  
Hossein Eslami ◽  
Parvin Sedaghat ◽  
Florian Müller-Plathe
Keyword(s):  
Crystal Structures ◽  
Bond Order ◽  
Accurate Determination ◽  
Three Dimensional ◽  
Order Parameters ◽  
Three Dimensions ◽  
Local Order ◽  
Crystalline Structures

Local order parameters for the characterization of liquid and different two- and three-dimensional crystalline structures are presented.

Characterization of dentine structure in three dimensions using FIB-SEM

2010 ◽  
Vol 240 (1) ◽  
pp. 1-5 ◽  
Author(s):  
J.S. EARL ◽  
R.K. LEARY ◽  
J.S. PERRIN ◽  
R. BRYDSON ◽  
J.P. HARRINGTON ◽  
...  
Keyword(s):  
Three Dimensions

Topological characterization of deterministic chaos: enforcing orientation preservation

2007 ◽  
Vol 366 (1865) ◽  
pp. 559-567 ◽  
Author(s):  
Marc Lefranc ◽  
Pierre-Emmanuel Morant ◽  
Michel Nizette
Keyword(s):  
Periodic Orbits ◽  
Topological Analysis ◽  
Three Dimensional ◽  
Deterministic Chaos ◽  
Three Dimensions ◽  
Unstable Periodic Orbits ◽  
Topological Characterization ◽  
Triangulated Surfaces ◽  
Theoretic Characterization

The determinism principle, which states that dynamical state completely determines future time evolution, is a keystone of nonlinear dynamics and chaos theory. Since it precludes that two state space trajectories intersect, it is a core ingredient of a topological analysis of chaos based on a knot-theoretic characterization of unstable periodic orbits embedded in a strange attractor. However, knot theory can be applied only to three-dimensional systems. Still, determinism applies in any dimension. We propose an alternative framework in which this principle is enforced by constructing an orientation-preserving dynamics on triangulated surfaces and find that in three dimensions our approach numerically predicts the correct topological entropies for periodic orbits of the horseshoe map.

The continuing search for the Holy Grail

2018 ◽  
Vol 16 (1) ◽  
pp. 97-106
Author(s):  
Robert M. Wiseman ◽  
Hadi Faqihi
Keyword(s):  
Design Methodology ◽  
Three Dimensions ◽  
Multiple Stakeholders ◽  
Future Directions ◽  
Content Type ◽  
Current State ◽  
Novel Approach ◽  
Ceo Pay ◽  
And Performance

Purpose The purpose of this paper is to enrich the finding by Aguinis et al. (2018) that there is little overlap between the extremes of firm performance and the extremes of CEO pay using a novel approach to characterize the distribution of pay and performance. The authors aim to shift the focus of compensation researchers from fruitlessly trying to link pay to performance to theory-rich accounts of pay that take into consideration the idiosyncratically motivated and socially embedded nature of CEO compensation. Design/methodology/approach The authors’ approach in this commentary is conceptual. They synthesize compensation literature from different fields such as economics, finance, sociology, strategic management and corporate law, as well as the empirical findings from the focal paper to support their characterization of the current state of the literature and future directions it should take. Findings The authors synthesize discussion of CEO pay down to three dimensions of CEO responsibilities and motivations. They argue that a realistic pay design should take into account that CEOs have limited control over performance, they are accountable to multiple stakeholders and they are motivated by financial as well as nonfinancial incentives. Originality/value The commentary presents researchers with high-order framing of CEO pay that goes beyond debating over methodology or narrowly focusing on limited behavioral drivers of pay setting. Instead, the authors encourage researchers to take advantage of their three-legged framework to theorize about CEO pay.

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