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Janus II: A new generation application-driven computer for spin-system simulations

M. Baity-Jesi, R.A. Baños, A. Cruz, L.A. Fernandez, J.M. Gil-Narvion, A. Gordillo-Guerrero, D. Iñiguez, A. Maiorano, F. Mantovani, E. Marinari, V. Martin-Mayor, J. Monforte-Garcia (+12 others)
2014 Computer Physics Communications  
This paper describes the architecture, the development and the implementation of Janus II, a new generation application-driven number cruncher optimized for Monte Carlo simulations of spin systems (mainly  ...  Janus II is one such machine, recently developed and commissioned, that builds upon and improves on the successful JANUS machine, which has been used for physics since 2008 and is still in operation today  ...  In particular we thank Pietro Lazzeri, Pamela Pedrini, Roberto Preatoni, Luigi Trombetta and Alessandro Zambardi for their professional and enthusiastic work. The Janus II project was supported by the  ... 
doi:10.1016/j.cpc.2013.10.019 fatcat:lwy6lvtq6ve5vmhhz5sxerup4i

Reconfigurable computing for Monte Carlo simulations: Results and prospects of the Janus project

M. Baity-Jesi, R. A. Baños, A. Cruz, L. A. Fernandez, J. M. Gil-Narvion, A. Gordillo-Guerrero, M. Guidetti, D. Iñiguez, A. Maiorano, F. Mantovani, E. Marinari, V. Martin-Mayor (+14 others)
2012 The European Physical Journal Special Topics  
We describe Janus, a massively parallel FPGA-based computer optimized for the simulation of spin glasses, theoretical models for the behavior of glassy materials.  ...  We describe Janus in detail and we summarize the physics results obtained in four years of operation of this machine; we discuss two types of physics applications: long simulations on very large systems  ...  Acknowledgments We wish to thank several past members of the Janus Collaboration, F. Belletti, M. Cotallo, D. Sciretti and J.L. Velasco, for their important contributions to the project.  ... 
doi:10.1140/epjst/e2012-01636-9 fatcat:6vnrlcipcre7zc743dinc3f4li

A microscopic model for chemically-powered Janus motors [article]

Mu-Jie Huang, Jeremy Schofield, Raymond Kapral
2016 arXiv   pre-print
Very small synthetic motors that make use of chemical reactions to propel themselves in solution hold promise for new applications in the development of new materials, science and medicine.  ...  Microscopic simulations of both single-motor and many-motor systems are carried out to illustrate the results.  ...  Computations were performed on the GPC supercomputer at the SciNet HPC Consortium. SciNet is funded by: the Canada Foundation for Innovation under the aus-  ... 
arXiv:1605.04880v1 fatcat:nzbzkp54ufc2len6qyj62fozz4

Rotating crystals of magnetic Janus colloids

J. Yan, S. C. Bae, S. Granick
2015 Soft Matter  
Acknowledgements We thank Gregory Grason and Amir Azadi for discussions. This work was supported by the U.S. Department of Energy, Division of Materials Science, under Award no.  ...  erwards. 44 New interesting physics and applications should be anticipated.  ...  Recently, Klapp and coworkers have shown using computer simulations that the loss of synchronicity of single particle motion can produce a macroscopic phase transition from a layered to a disordered state  ... 
doi:10.1039/c4sm01962h pmid:25372218 fatcat:ihg2yc3mr5dg3ojfqhqlcx3nsq

Graphene-based two-dimensional Janus materials

Sze-Wing Ng, Nuruzzaman Noor, Zijian Zheng
2018 NPG Asia Materials  
The applications of graphene-based Janus materials are discussed with a specific focus on the Janus structures that lead to bandgap engineering, as well as the construction of a responsive system on graphene  ...  The Janus structure allows for a unidirectional transportation system and programmed response to certain stimuli to be achieved.  ...  Acknowledgements We acknowledge General Research Fund of Hong Kong (PolyU 5036/13P, PolyU 153041/14P) and The Hong Kong Polytechnic University (Project 1-ZVGH) for financial support of the work.  ... 
doi:10.1038/s41427-018-0023-8 fatcat:6p7woawzgnahzoivur2lwfhiba

Strain-controlled magnetic and electric polarized states in two-dimensional magnetic Janus semiconductor [article]

Zhen Zhang, Jing-Yang You, Bo Gu, Gang Su
2020 arXiv   pre-print
interest for their potential applications.  ...  direction, which highlights the 2D magnetic Janus semiconductor as a new platform to design spintronic materials.  ...  interest for their potential applications.  ... 
arXiv:2001.02842v1 fatcat:o5taqvqd4naebjrbp5kn2oyehe

Janus fluid with fixed patch orientations: Theory and simulations

Miguel Ángel G. Maestre, Riccardo Fantoni, Achille Giacometti, Andrés Santos
2013 Journal of Chemical Physics  
We study thermophysical properties of a Janus fluid with constrained orientations, using analytical techniques and numerical simulations.  ...  The analytical approach hinges on a mapping of the above Janus fluid onto a binary mixture interacting via a "quasi" isotropic potential.  ...  Section II describes our Janus model and its mapping onto a binary mixture with asymmetric interactions. It is shown in Sec.  ... 
doi:10.1063/1.4793626 pmid:23485323 fatcat:n4iklfm3cremfclaf3cwrlrqqy

Sensitive electronic correlation effects on electronic properties in ferrovalley material Janus FeClF monolayer [article]

San-Dong Guo, Jing-Xin Zhu, Meng-Yuan Yin, Bang-Gui Liu
2021 arXiv   pre-print
In this work, taking Janus monolayer FeClF as a concrete example, the correlation effects on its electronic structures are investigated by using generalized gradient approximation plus U (GGA+U) approach  ...  For QAH state, there are a unit Chern number and a chiral edge state connecting the conduction and valence bands.  ...  The local energy extremes in the conduction band or valence band are referred to as valleys, and they provide a new effective degree of freedom, in addition to conventional charge and spin.  ... 
arXiv:2111.07110v1 fatcat:py5qz63anrenbbs35c435ulr74

Magnetic interaction of Janus magnetic particles suspended in a viscous fluid

Yujin Seong, Tae Gon Kang, Martien A. Hulsen, Jaap M. J. den Toonder, Patrick D. Anderson
2016 Physical review. E  
We studied the magnetic interaction between circular Janus magnetic particles suspended in a Newtonian fluid under the influence of an externally applied uniform magnetic field.  ...  Upon applying the magnetic field, contrary to isotropic paramagnetic particles, a single Janus particle can rotate due to the magnetic torque created by the magnetic anisotropy of the particle.  ...  In these systems, functionalized magnetic particles have been adopted for use as actuators, stirrers to enhance mixing, capturers and carriers of target analytes, and biosensors for diagnostic applications  ... 
doi:10.1103/physreve.93.022607 pmid:26986377 fatcat:fewtjlpwxrae3hngrj2lru6eki

Non-Gaussian statistics for the motion of self-propelled Janus particles: Experiment versus theory

Xu Zheng, Borge ten Hagen, Andreas Kaiser, Meiling Wu, Haihang Cui, Zhanhua Silber-Li, Hartmut Löwen
2013 Physical Review E  
Spherical Janus particles are one of the most prominent examples for active Brownian objects. Here, we study the diffusiophoretic motion of such microswimmers in experiment and in theory.  ...  Furthermore, the full displacement probability distribution is analyzed, where in agreement with Brownian dynamics simulations either an extremely broadened peak or a pronounced double-peak structure is  ...  ACKNOWLEDGMENTS We thank Jiang Lei for using electron beam evaporation to prepare the Janus particles. This work was financially supported by the National Natural Science Foundation of China  ... 
doi:10.1103/physreve.88.032304 pmid:24125265 fatcat:igg4mxxpyje2fhwpkjuj3mki5a

Keynotes

Rainer Leupers, Raffaele Tripiccione, Henk Corporaal
2012 2012 IEEE 23rd International Conference on Application-Specific Systems, Architectures and Processors  
At the same time, especially in battery driven devices, maximum energy efficiency is a must.  ...  Furthermore, we will sketch the MAPS compiler approach for mapping embedded application software onto heterogeneous parallel target platforms.  ...  He has played a major role in the development of several application-driven high performance computer systems for physics applications.  ... 
doi:10.1109/asap.2012.38 fatcat:sodweh357baoxn4723rl6hliri

The Janus-Face of CEO Retention - CEO Succession & Performance under Unity of Ownership & Control

Jan-Philipp Ahrens, Lorraine M. Uhlaner, M. Woywode, Jan Zybura
2016 Academy of Management Proceedings  
This applies to organising a conference, to managing EURAM, to running a small business, a charity, a multinational corporation, and to local government as much as it does to assuming responsibility for  ...  EURAM 2017 is not going to generate the solutions to all our woes and anguishes.  ...  CONTEXT Cheryl Marie Cordeiro UNIVERSITY OF GOTHENBURG 1428 STUDENT NETWORKS AND ACADEMIC ACHIEVEMENT: METHODOLOGICAL LESSONS AND PROPOSALS THE COMPUTATIONAL SIMULATION EXPLORATION METHOD FOR MANAGEMENT  ... 
doi:10.5465/ambpp.2016.15674abstract fatcat:rw4g3lwbf5dppc42sc7r443xry

Quantum simulation of the hexagonal Kitaev model with trapped ions

Roman Schmied, Janus H Wesenberg, Dietrich Leibfried
2011 New Journal of Physics  
We present a detailed study of quantum simulations of coupled spin systems in surface-electrode ion-trap arrays, and illustrate our findings with a proposed implementation of the hexagonal Kitaev model  ...  driven by state-dependent forces.  ...  Acknowledgments We thank Miguel Aguado and Ignacio Cirac for discussions on the properties of the Kitaev model, Dave Wineland for discussions and comments on the manuscript, Jonathan Home for discussions  ... 
doi:10.1088/1367-2630/13/11/115011 fatcat:2g7ulwwlunay3lbsljfzrgbbwq

Essential functions of the Janus kinase 2 (Jak2) during mammary gland development and tumorigenesis

K Sakamoto, A Krempler, AA Triplett, J Zhu, H Rui, K-U Wagner
2005 Breast Cancer Research  
Our data do not support the hypothesis that TGF-β signaling in mammary carcinoma cells is important for invasion and metastasis, at least in this model system.  ...  Mice are being followed for mammary tumor development.  ...  Results The method is demonstrated (for all three models) on simulated binary copy number status data for varying number of genes and tumors.  ... 
doi:10.1186/bcr1125 fatcat:yq4742r6v5gf3agpigcrfculmu

Recent developments in the PySCF program package [article]

Qiming Sun, Xing Zhang, Samragni Banerjee, Peng Bao, Marc Barbry, Nick S. Blunt, Nikolay A. Bogdanov, George H. Booth, Jia Chen, Zhi-Hao Cui, Janus Juul Eriksen, Yang Gao (+34 others)
2020 arXiv   pre-print
PYSCF is a Python-based general-purpose electronic structure platform that both supports first-principles simulations of molecules and solids, as well as accelerates the development of new methodology  ...  We then summarize the capabilities of PYSCF for molecular and solid-state simulations.  ...  FIG. 8 : 8 , which shows the wall time and speedup of Fock builds for a system (a) Ground-state energy calculations for Fe(II)-porphine at the DMRG-CASSCF/cc-pV5Z level with an active space of 22 electrons  ... 
arXiv:2002.12531v1 fatcat:gkup57qilnc5xkbeidcunhvdja
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