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Distributed User Profiling via Spectral Methods [article]

Dan-Cristian Tomozei, Laurent Massoulié
2013 arXiv   pre-print
We compute a profile vector for each user (i.e., a low-dimensional vector that characterises her taste) via spectral transformation of observed user-produced ratings for items.  ...  In the present paper we investigate the feasibility of user profiling in a distributed setting, with no central authority and only local information exchanges between users.  ...  A Method for Distributed Spectral Profiling In Section 3 we have demonstrated the benefits of spectral profiling.  ... 
arXiv:1109.3318v2 fatcat:z2rjuql32nawjczjzhxkucmpqa

Distributed user profiling via spectral methods

Dan-Cristian Tomozei, Laurent Massoulié
2010 Proceedings of the ACM SIGMETRICS international conference on Measurement and modeling of computer systems - SIGMETRICS '10  
We compute a profile vector for each user (i.e., a lowdimensional vector that characterises her taste) via spectral transformation of observed user-produced ratings for items.  ...  (ii) We develop distributed algorithms which provably achieve an embedding of users into a low-dimensional space, based on spectral transformation.  ...  None of these approaches are distributed however. Our contribution consists precisely in augmenting these methods to make them distributed. A method for distributed spectral profiling.  ... 
doi:10.1145/1811039.1811098 dblp:conf/sigmetrics/TomozeiM10 fatcat:zgoq7zv7wvblrlj3zqj72mzfpm

Distributed user Profiling via Spectral Methods

Dan-Cristian Tomozei, Laurent Massoulié
2014 Stochastic Systems  
We compute a profile vector for each user (i.e., a lowdimensional vector that characterises her taste) via spectral transformation of observed user-produced ratings for items.  ...  (ii) We develop distributed algorithms which provably achieve an embedding of users into a low-dimensional space, based on spectral transformation.  ...  None of these approaches are distributed however. Our contribution consists precisely in augmenting these methods to make them distributed. A method for distributed spectral profiling.  ... 
doi:10.1287/11-ssy036 fatcat:wiyy7jn7g5cebl23a4jhd7vbmm

Distributed user profiling via spectral methods

Dan-Cristian Tomozei, Laurent Massoulié
2014 Stochastic Systems  
We compute a profile vector for each user (i.e., a lowdimensional vector that characterises her taste) via spectral transformation of observed user-produced ratings for items.  ...  (ii) We develop distributed algorithms which provably achieve an embedding of users into a low-dimensional space, based on spectral transformation.  ...  None of these approaches are distributed however. Our contribution consists precisely in augmenting these methods to make them distributed. A method for distributed spectral profiling.  ... 
doi:10.1214/11-ssy036 fatcat:6i4bbvbhabei3mqya35uny3bwq

Distributed user profiling via spectral methods

Dan-Cristian Tomozei, Laurent Massoulié
2010 Performance Evaluation Review  
We compute a profile vector for each user (i.e., a lowdimensional vector that characterises her taste) via spectral transformation of observed user-produced ratings for items.  ...  (ii) We develop distributed algorithms which provably achieve an embedding of users into a low-dimensional space, based on spectral transformation.  ...  None of these approaches are distributed however. Our contribution consists precisely in augmenting these methods to make them distributed. A method for distributed spectral profiling.  ... 
doi:10.1145/1811099.1811098 fatcat:xstbwd3rzba55f7iebtgbpkqie

Spotting Suspicious Link Behavior with fBox: An Adversarial Perspective

Neil Shah, Alex Beutel, Brian Gallagher, Christos Faloutsos
2014 2014 IEEE International Conference on Data Mining  
Typical methods of catching this suspicious behavior use spectral techniques to spot large groups of often blatantly fraudulent (but sometimes honest) users.  ...  Online popularity of a user or product (via follows, page-likes, etc.) can be monetized on the premise of higher ad click-through rates or increased sales.  ...  Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright notation here on.  ... 
doi:10.1109/icdm.2014.36 dblp:conf/icdm/ShahBGF14 fatcat:bhplplx42nffvg3qjplqwbmtpa

Asymptotic analysis of Channel Division Multiple Access schemes for ultra-wideband systems

Raul de Lacerda, Laura Cottatellucci, Aawatif Hayar, Merouane Debbah
2008 2008 IEEE 9th Workshop on Signal Processing Advances in Wireless Communications  
As a consequence, we observe that the asymptotic spectral efficiency depends only on the system load, the power delay profile, the noise variance and the pulse signal.  ...  the energy of the paths, is built based on the channel power profile.  ...  We validated the asymptotic equations via simulation results and verified the impact of the power delay profile on ChDMA systems.  ... 
doi:10.1109/spawc.2008.4641595 fatcat:wwtttbinvndojklynhtzowfvfq

Social Networking by Proxy: A Case Study of Catster, Dogster and Hamsterster [article]

Daniel Dünker, Jérôme Kunegis
2015 arXiv   pre-print
In order to do so, we introduce the concept of multi-profile social network, extend a previously defined spectral test of diagonality to multi-profile networks, define two new homophily measures for multi-profile  ...  These online pet social networks provide a unique opportunity to study an online social network in which a single user manages multiple user profiles, i.e. one for each pet they own.  ...  Both sites are linked: A single user can create pet profiles on both sites, and individual cat and dog profile pages are interlinked via a family link when they were created by the same user. hamsterster.com  ... 
arXiv:1501.04527v2 fatcat:ucseco5d7nhxbc736s4o4hu3sa

A Novel Signal Identification Method via Improved Random Forest in Cognitive Network

Xin WANG, Jin-kuan WANG, Zhi-gang LIU, Xin Song, Xi HU
2016 International Journal of Signal Processing, Image Processing and Pattern Recognition  
First and foremost, a set of cyclic spectrum features of the received radio signal are calculated via cyclic spectral correlation analysis.  ...  to identify the various modulation types of primary user signals.  ...  A set of cyclic spectrum features of the received radio signal are calculated via cyclic spectral correlation analysis.  ... 
doi:10.14257/ijsip.2016.9.3.12 fatcat:5irvync5zvgldjhmch33y4eqne

Stingray: A Modern Python Library For Spectral Timing [article]

D. Huppenkothen, M. Bachetti, A. L. Stevens, S. Migliari, P. Balm, O. Hammad, U. M. Khan, H. Mishra, H. Rashid, S. Sharma, R. V. Blanco, E. M. Ribeiro
2019 arXiv   pre-print
Its modular build allows for easy extensions and incorporation of its methods into data analysis workflows and pipelines.  ...  We aim for the library to be a platform for the implementation of future spectral-timing techniques.  ...  The spectral shape can be input as a spectral power-law index, astropy.modeling.models objects, as well as a user-given array of powers.  ... 
arXiv:1901.07681v1 fatcat:xdqxzulg2bgqpo5uu3js7c2uxu

stingray: A modern Python library for spectral timing

Daniela Huppenkothen, Matteo Bachetti, Abigail Stevens, Simone Migliari, Paul Balm, Omar Hammad, Usman Khan, Himanshu Mishra, Haroon Rashid, Swapnil Sharma, Evandro Ribeiro, Ricardo Blanco
2019 Journal of Open Source Software  
Its modular build allows for easy extensions and incorporation of its methods into data analysis workflows and pipelines.  ...  We aim for the library to be a platform for the implementation of future spectral-timing techniques.  ...  The spectral shape can be input as a spectral power-law index, astropy.modeling.models objects, as well as a user-given array of powers.  ... 
doi:10.21105/joss.01393 fatcat:e7mywjsoevfq5eu5botjtag5ha

Stingray: A Modern Python Library for Spectral Timing

Daniela Huppenkothen, Matteo Bachetti, Abigail L. Stevens, Simone Migliari, Paul Balm, Omar Hammad, Usman Mahmood Khan, Himanshu Mishra, Haroon Rashid, Swapnil Sharma, Evandro Martinez Ribeiro, Ricardo Valles Blanco
2019 Astrophysical Journal  
Its modular build allows for easy extensions and incorporation of its methods into data analysis workflows and pipelines.  ...  We aim for the library to be a platform for the implementation of future spectral-timing techniques.  ...  The spectral shape can be input as a spectral power-law index, astropy.modeling.models objects, as well as a user-given array of powers.  ... 
doi:10.3847/1538-4357/ab258d fatcat:wlnzmemi2zhg7prmi3s3nhhxni

Spotting Suspicious Link Behavior with fBox: An Adversarial Perspective [article]

Neil Shah, Alex Beutel, Brian Gallagher, Christos Faloutsos
2014 arXiv   pre-print
Typical methods of catching this suspicious behavior use spectral techniques to spot large groups of often blatantly fraudulent (but sometimes honest) users.  ...  Online popularity of a user or product (via follows, page-likes, etc.) can be monetized on the premise of higher ad click-through rates or increased sales.  ...  The distribution of singular values can be seen in Figure 3b . Our analysis is conducted both directly and via synthetic attacks. B.  ... 
arXiv:1410.3915v1 fatcat:iz2lld5hrragvdmurbo2udrxqa

VoigtFit: A Python package for Voigt profile fitting [article]

Jens-Kristian Krogager
2018 arXiv   pre-print
I present a Python package developed for fitting Voigt profiles to absorption lines.  ...  Moreover, the code is able to automatically fit a polynomial continuum model together with the line profiles.  ...  The user can specify any of the other vector minimization methods implemented in lmfit via the input parameter file (e.g., fit-options method='nelder' to use 'Nelder-Mead' minimization).  ... 
arXiv:1803.01187v1 fatcat:qmeqsqtiyjhyde4i3p7kurdgd4

BioSunMS: a plug-in-based software for the management of patients information and the analysis of peptide profiles from mass spectrometry

Yuan Cao, Na Wang, Xiaomin Ying, Ailing Li, Hengsha Wang, Xuemin Zhang, Wuju Li
2009 BMC Medical Informatics and Decision Making  
The software is freely distributed under GNU General Public License (GPL) and can be downloaded from http://sourceforge.net/projects/ biosunms/.  ...  By integrating all functions into a user-friendly desktop application, BioSunMS provided a comprehensive solution for clinical researchers without any knowledge in programming, as well as a plug-in architecture  ...  This class provides some methods for executing R scripts and commands. All communication with R language takes place via the file system.  ... 
doi:10.1186/1472-6947-9-13 pmid:19220920 pmcid:PMC2654546 fatcat:hgj2jvh36rfq7c5fhw34sw6nyi
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