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ACE: An Emergent Algorithm for Highly Uniform Cluster Formation [chapter]

Haowen Chan, Adrian Perrig
2004 Lecture Notes in Computer Science  
We present ACE, an algorithm that results in highly uniform cluster formation that can achieve a packing efficiency close to hexagonal close-packing.  ...  By using the self-organizing properties of three rounds of feedback between nodes, the algorithm induces the emergent formation of clusters that are an efficient cover of the network, with significantly  ...  ACE is an emergent algorithm that uses just three rounds of feedback to induce the formation of a highly efficient cover of uniform clusters over the network.  ... 
doi:10.1007/978-3-540-24606-0_11 fatcat:64wzwucatngzxevl3zz7izvkye

Developments in experimental and agent-based computational economics (ACE): overview

Sheri M. Markose
2006 Journal of Economic Interaction and Coordination  
WEHIA 2005, the 10th anniversary of the pre-eminent agent-based computational economics (ACE) conference held at the University of Essex, marks a hide tide of the ACE methodology and of experimental economics  ...  This Special Issue contains seven papers selected for their innovative quality, and for clarity and rigour in their presentation.  ...  a generic format and researchers have yet to make any attempt to model and provide insights on this for specific industries.  ... 
doi:10.1007/s11403-006-0015-6 fatcat:7bv4r5gv75bela6jrpe5c2w7jm

Chapter 21 ACE Models of Endogenous Interactions [chapter]

Nicolaas J. Vriend
2006 Handbook of Computational Economics  
They show that the model explains high clustering, which does not go to zero as the network grows (unlike a number of alternative network formation processes).  ...  More precisely, they focus on the following three stylized features of such networks: highly clustered connections (which means that two agents linked to a given agent are themselves likely to be linked  ...  Where can the ACE modeling of endogenous interactions go from here? Obviously the approaches discussed could be improved, and alternatives may be created.  ... 
doi:10.1016/s1574-0021(05)02021-6 fatcat:fs53h56nhbebzb6eh7agzxjmei

Adaptive Cluster Expansion (ACE): A Multilayer Network for Estimating Probability Density Functions [article]

Stephen Luttrell
2010 arXiv   pre-print
We derive an adaptive hierarchical method of estimating high dimensional probability density functions. We call this method of density estimation the "adaptive cluster expansion" or ACE for short.  ...  We present an application of this approach, based on a multilayer topographic mapping network, that adaptively estimates the joint probability density function of the pixel values of an image, and presents  ...  We call the hierarchical network structure that emerges from our analysis an "Adaptive Cluster Expansion", or ACE for short.  ... 
arXiv:1012.3656v1 fatcat:m2tym6kejnbezgdxnfmpqzzl7u

Hierarchical Self-Assembly of Noncanonical Guanine Nucleobases on Graphene

Nabanita Saikia, Kevin Waters, Shashi P. Karna, Ravindra Pandey
2017 ACS Omega  
Self-assembly characterizes the fundamental basis toward realizing the formation of highly ordered hierarchical heterostructures.  ...  We find that the free-standing bases in gas phase aggregate into clusters dominated by intermolecular H-bonds, whereas in solvent, substantial screening of intermolecular interactions results in π-stacked  ...  Abstract Self-assembly characterizes the fundamental basis toward realizing the formation of highly ordered hierarchical heterostructures.  ... 
doi:10.1021/acsomega.7b00528 pmid:31457668 pmcid:PMC6641521 fatcat:pvul47kpvbakzcnfczqtil5p6m

Review of Applications of Fuzzy Logic in Multi-Agent-Based Control System of AC-DC Hybrid Microgrid

H. W. D. Hettiarachchi, K. T. M. Udayanga Hemapala, A. G. Buddhika P. Jayasekara
2019 IEEE Access  
Among recent developments in control techniques, fuzzy logic and multi agent systems have emerged due to its strong control action in an uncertain environment.  ...  This paper strives to highlight the approaches of controlling the energy storage systems, dc voltage, frequency, and ac voltage with the aid of the fuzzy logic and multi agent systems related controllers  ...  and Multi Microgrid Operation in order to form an intelligent clustered Microgrid operation.  ... 
doi:10.1109/access.2018.2884503 fatcat:p7gwoknbevbibj7fhc2qew7hoi

Thermally Induced Hydrogen-Bond Rearrangements in Small Water Clusters and the Persistent Water Tetramer

Nagaprasad Reddy Samala, Noam Agmon
2019 ACS Omega  
Using the best available water potential (MB-pol), an advanced thermostating algorithm (g-BAOAB), and sufficiently long trajectories, we map the "bifurcation", "melting", and (hitherto unexplored) "vaporization  ...  We find that logarithmically small tails in the radial probability densities of (H2O) n clusters (n = 2 - 6) provide direct testimony for such transitions.  ...  ■ ACKNOWLEDGMENTS We thank Andrea Zonca for help in installing MB-pol. The research was supported in part by the Israel Science Foundation, grant no. 722/19.  ... 
doi:10.1021/acsomega.9b03326 pmid:31909342 pmcid:PMC6941388 fatcat:3audhuhyvrbzzacu5lwpt7bcl4

Magneto-Optical Nanoparticles for Cyclic Magnetomotive Photoacoustic Imaging

Junwei Li, Bastien Arnal, Chen-Wei Wei, Jing Shang, Thu-Mai Nguyen, Matthew O'Donnell, Xiaohu Gao
2015 ACS Nano  
Photoacoustic imaging has emerged as a highly promising tool to visualize molecular events with deep tissue penetration.  ...  First, we introduce a new class of compact, uniform, magneto-optically coupled core-shell nanoparticles, prepared through localized copolymerization of polypyrrole (PPy) on an iron oxide nanoparticle surface  ...  Pavel Zrazhevskiy at University of Washington for fruitful discussions on nanotoxicity and hybrid nanoparticle synthesis. We are also grateful to Jeff Magula for manufacturing the electromagnet.  ... 
doi:10.1021/nn5069258 pmid:25658655 pmcid:PMC4610822 fatcat:ornfjelhnbb6bbotbnhva3huge

Silk–Its Mysteries, How It Is Made, and How It Is Used

Davoud Ebrahimi, Olena Tokareva, Nae Gyune Rim, Joyce Y. Wong, David L. Kaplan, Markus J. Buehler
2015 ACS Biomaterials Science & Engineering  
A central question that will be explored is how the bridging of scales and the emergence of hierarchical structures are critical elements in achieving novel material properties, and how this knowledge  ...  to current experimental and computational designs in the field of synthetic silklike materials are provided to assist the materials science community in engineering customized finetuned biomaterials for  ...  The origins of silk back to more than 5000 years ago served as a bridge between cultures and as an economic engine for developing countries over the millennia, due to the emergence of silk as a commodity  ... 
doi:10.1021/acsbiomaterials.5b00152 pmid:27398402 pmcid:PMC4936833 fatcat:trhp3mb3hbglhmsm2nuhx2pmnq

Protein-Assisted Assembly of Modular 3D Plasmonic Raspberry-like Core/Satellite Nanoclusters: Correlation of Structure and Optical Properties

Roland P. M. Höller, Martin Dulle, Sabrina Thomä, Martin Mayer, Anja Maria Steiner, Stephan Förster, Andreas Fery, Christian Kuttner, Munish Chanana
2016 ACS Nano  
for applications such as surface-enhanced spectroscopies.  ...  We present a bottom-up assembly route for a largescale organization of plasmonic nanoparticles (NPs) into threedimensional (3D) modular assemblies with core/satellite structure.  ...  We thank the IT service center at the University of Bayreuth (btrzx3 cluster) for computer resources.  ... 
doi:10.1021/acsnano.5b07533 pmid:26982386 pmcid:PMC4928146 fatcat:2czd7md5bfecnbfjxpera3qauy

Final-State Simulations of Core-Level Binding Energies at Metal-Organic Hybrid Interfaces: Artifacts Caused by Spurious Collective Electrostatic Effects

Thomas C. Taucher, Oliver T. Hofmann, Egbert Zojer
2020 ACS Omega  
We also argue that the calculated work function change due to a core-level excitation can serve as an indication for the occurrence of such an artifact and discuss possible remedies for the problem.  ...  In this work, we study methane on an Al(100) surface as a deliberately chosen model system for hybrid interfaces to evaluate the impact of this computational artifact.  ...  Triptycene Tripods for the Formation of Highly Uniform and Densely Packed Self-Assembled Monolayers with Controlled Molecular Orientation. J. Am. Chem.  ... 
doi:10.1021/acsomega.0c03209 pmid:33073112 pmcid:PMC7557941 fatcat:noqli3hkrvhg3oid75uq2bh6bm

Application of evolutionary algorithm methods to polypeptide folding: Comparison with experimental results for unsolvated Ac-(Ala-Gly-Gly)5-LysH+

M. Damsbo, B. S. Kinnear, M. R. Hartings, P. T. Ruhoff, M. F. Jarrold, M. A. Ratner
2004 Proceedings of the National Academy of Sciences of the United States of America  
We present an evolutionary method for finding the low-energy conformations of polypeptides.  ...  The method is applied to unsolvated Met-enkephalin and Ac-(Ala-Gly-Gly)5-Lys ؉ H ؉ .  ...  We thank Jiri Kolafa for use of his MACSIMUS molecular modeling programs and for access to his source code.  ... 
doi:10.1073/pnas.0401659101 pmid:15123828 pmcid:PMC409899 fatcat:vp5ndfvoubg2nhvo2uijmkyf4e

First-Principles Study of the Ferromagnetic Properties of Cr2CO2 and Cr2NO2 MXenes

Zhiyun Tan, Zhenxing Fang, Baihai Li, Youchang Yang
2020 ACS Omega  
Improvements over PW91 include an accurate description of the linear response of the uniform electron gas, correct behavior under uniform scaling, and a smoother potential. 33 Togo, A.  ...  Improvements over PW91 include an accurate description of the linear response of the uniform electron gas, correct behavior under uniform scaling, and a smoother potential. 33 Togo, A.  ... 
doi:10.1021/acsomega.0c03176 pmid:33073110 pmcid:PMC7557974 fatcat:yz3fiy6wsfbztkyqnnasxqfkdu

Complex Stoichiometry-Dependent Reordering of 3,4,9,10-Perylenetetracarboxylic Dianhydride on Ag(111) upon K Intercalation

Christian Zwick, Anu Baby, Marco Gruenewald, Elisabeth Verwüster, Oliver T. Hofmann, Roman Forker, Guido Fratesi, Gian Paolo Brivio, Egbert Zojer, Torsten Fritz
2016 ACS Nano  
Alkali metal atoms are frequently used for simple yet efficient n-type doping of organic semiconductors and as an ingredient of the recently discovered polycyclic aromatic hydrocarbon superconductors.  ...  Our results demonstrate that only the combination of experimental and theoretical approaches allows for an unambiguous explanation of the pronounced reordering of KxPTCDA/Ag(111) upon changing the K content  ...  ., and G.P.B. for interpretation of results. C.Z., M.G., and R.F. prepared the figures and wrote the paper together with A.B., G.F., G.P.B., E.Z., and T.F., who directed the research.  ... 
doi:10.1021/acsnano.5b07145 pmid:26718635 pmcid:PMC4768340 fatcat:6xccrpscefhijpw7pmzitd5kqe

Atomic Layer Deposition of Photoconductive Cu2O Thin Films

Tomi Iivonen, Mikko J. Heikkilä, Georgi Popov, Heta-Elisa Nieminen, Mikko Kaipio, Marianna Kemell, Miika Mattinen, Kristoffer Meinander, Kenichiro Mizohata, Jyrki Räisänen, Mikko Ritala, Markku Leskelä
2019 ACS Omega  
Herein, we report an atomic layer deposition (ALD) process for Cu2O thin films using copper(II) acetate [Cu(OAc)2] and water vapor as precursors.  ...  Our proof-of-concept devices show that approximately 20 nm thick Cu2O films can be used for photodetection in the visible wavelength range and that the thin film photoconductors exhibit improved device  ...  For films deposited over 7000 cycles, the larger grains were no ACS Omega Article longer observed, and a more uniform surface morphology was obtained.  ... 
doi:10.1021/acsomega.9b01351 pmid:31460221 pmcid:PMC6648912 fatcat:g3egfkv4ljahvkmhky2vbgjvma
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