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Expansion of the field of informetrics: Origins and consequences

L. Egghe
2005 Information Processing & Management  
The journal Information Processing and Management decided to devote two special issues (the one here and another one to come in 2006) to the broad topic "Informetrics" where the scope of these special  ...  This has lead some journals to increase their number of volumes or the number of issues per volume.  ...  Also the paper of Egghe (independently refereed), entitled "Continuous, weighted Lorenz theory and applications to the study of fractional relative impact factors", deals with Lorenz curves.  ... 
doi:10.1016/j.ipm.2005.03.011 fatcat:5owg5vtesnajdm5o2hxsnpvc4y

Expansion of the field of informetrics: The second special issue

L. Egghe
2006 Information Processing & Management  
The journal Information Processing and Management decided to devote two special issues (the one here and another one to come in 2006) to the broad topic "Informetrics" where the scope of these special  ...  This has lead some journals to increase their number of volumes or the number of issues per volume.  ...  Also the paper of Egghe (independently refereed), entitled "Continuous, weighted Lorenz theory and applications to the study of fractional relative impact factors", deals with Lorenz curves.  ... 
doi:10.1016/j.ipm.2006.02.004 fatcat:ztrgo5kjn5bc3e22bxwkwn4keu

Noise can reduce disorder in chaotic dynamics

Denis S. Goldobin
2014 The European Physical Journal Special Topics  
We show analytically and numerically a weak noise to reduce this inhomogeneity and, additionally to obvious perturbing impact, make a regularizing influence on the chaotic dynamics.  ...  We evoke the idea of representation of the chaotic attractor by the set of unstable periodic orbits and disclose a novel noise-induced ordering phenomenon.  ...  Our map is induced by a continuous time evolution and in the presence of time-dependent signal, noise, one has to deal with a continuous-time evolution.  ... 
doi:10.1140/epjst/e2014-02179-9 fatcat:76fnmjsfkzcxbe4uji2rrr43na

Optical properties of non-spherical desert dust particles in the terrestrial infrared – An asymptotic approximation approach

Lars Klüser, Claudia Di Biagio, Paul D. Kleiber, Paola Formenti, Vicki H. Grassian
2016 Journal of Quantitative Spectroscopy and Radiative Transfer  
It 29 has been shown that the choice of particle shape strongly impacts the quality of the simulations.  ...  It is shown that the non-spherical asymptotic approximation improves the spectral 23 extinction pattern, including position of the extinction peaks, compared to the Lorenz-Mie calculations for 24 spherical  ...  As a consequence it seems 262 reasonable to separate the regions of applicability for these different approximations at x=1, where 263 the weighting fractions are simply postulated to be equal, f 1 =f  ... 
doi:10.1016/j.jqsrt.2015.11.020 fatcat:spwcw5wp2zaxbldl67ohb72u7q

A method to evaluate equitable accessibility: combining ethical theories and accessibility-based approaches

Karen Lucas, Bert van Wee, Kees Maat
2015 Transportation  
The method combines the use of underlying ethics principles, more specifically the theories of egalitarianism and sufficientarianism, in combination with accessibility-based analysis and the Lorenz curve  ...  However, understanding this is highly relevant for policymakers to understand the impacts of their transport decisions.  ...  Acknowledgments We thank the four reviewers of our paper for their detailed and extremely useful comments on our earlier drafts, which have helped us to significantly improve the quality of our final submitted  ... 
doi:10.1007/s11116-015-9585-2 fatcat:4wzfzh5livhc7njk6j2za4vp3a

Rare event computation in deterministic chaotic systems using genealogical particle analysis

J Wouters, F Bouchet
2016 Journal of Physics A: Mathematical and Theoretical  
We demonstrate that the genealogical particle analysis algorithms can be successfully applied to a toy model of atmospheric dynamics, the Lorenz '96 model.  ...  We furthermore use the Ornstein-Uhlenbeck system to illustrate a number of implementation issues.  ...  Acknowledgements The authors would like to thank Eric Vanden-Eijnden, Eric Simonnet, Joran Rolland  ... 
doi:10.1088/1751-8113/49/37/374002 fatcat:yfikxtniifdo5hwpjiwxp2dbky

Recommendation Networks and the Long Tail of Electronic Commerce

Gal Oestreicher-Singer, Arun Sundararajan
2010 Social Science Research Network  
We estimate that doubling of the average network in ‡uence on a category is associated with an increase in the relative demand for the least popular 20% of products by about 50%, and reduce the relative  ...  We measure the overall extent to which a product is in ‡uenced by its network position by using a variant of Google's PageRank measure of centrality and we characterize the demand distribution of each  ...  Speci…cally, we study the extent to which the position of products in this kind of network will a¤ect their relative demand and revenue.  ... 
doi:10.2139/ssrn.1324064 fatcat:jvniyz64xzgqzhhc5ksjhlhgfu

Particle sizing calibration with refractive index correction for light scattering optical particle counters and impacts upon PCASP and CDP data collected during the Fennec campaign

P. D. Rosenberg, A. R. Dean, P. I. Williams, J. R. Dorsey, A. Minikin, M. A. Pickering, A. Petzold
2012 Atmospheric Measurement Techniques  
<br><br> As would be expected from Mie-Lorenz theory, the impact of the refractive index corrections has been found to be largest for absorbing materials and the impact on Saharan dust measurements made  ...  as part of the Fennec project has been found to be up to a factor of 3 for the largest particles measured by CDP with diameters of approximately 120 μm.  ...  entity of NERC and the Met Office.  ... 
doi:10.5194/amt-5-1147-2012 fatcat:7p5nwug7tnd43eaj4ngjvbvbmq

Deep reconstruction of strange attractors from time series [article]

William Gilpin
2020 arXiv   pre-print
We conclude by using our technique to discover dynamical attractors in diverse systems such as patient electrocardiograms, household electricity usage, neural spiking, and eruptions of the Old Faithful  ...  Here, we study the opposite limit, in which hidden governing coordinates must be inferred from only a low-dimensional time series of measurements.  ...  Acknowledgments and Disclosure of Funding  ... 
arXiv:2002.05909v3 fatcat:zyijiqzoebeadk3trmrpwjnmme

From Power Curves to Discriminative Power: Measuring Model Performance of LGD Models

Robert Frontczak, Michael Jaeger, Bernd Schumacher
2017 Journal of Mathematical Finance  
We develop a measure for the discriminative power of LGD models based on Lorenz curves. We study first properties and introduce some alternatives for its calculation from a practical point of view.  ...  The concept of discrimination, i.e. the discriminative power, is used in credit risk modeling to assess the quality of a risk model concerning the separation of extreme events.  ...  Acknowledgements The authors thank the referees for a careful reading of the manuscript and the constructive comments.  ... 
doi:10.4236/jmf.2017.73034 fatcat:fnlf73ke4zbz3fyfa6gdwlaivy

From Power Curves to Discriminative Power: Measuring Model Performance of LGD Models

Robert Frontczak, Michael Jaeger
2017 Social Science Research Network  
We develop a measure for the discriminative power of LGD models based on Lorenz curves. We study first properties and introduce some alternatives for its calculation from a practical point of view.  ...  The concept of discrimination, i.e. the discriminative power, is used in credit risk modeling to assess the quality of a risk model concerning the separation of extreme events.  ...  Acknowledgements The authors thank the referees for a careful reading of the manuscript and the constructive comments.  ... 
doi:10.2139/ssrn.2954757 fatcat:4kba3jykjnfcvh27bky7qti2ne

Diversity in Biology: definitions, quantification, and models [article]

Song Xu, Lucas Böttcher, Tom Chou
2019 arXiv   pre-print
The utility of these different metrics or set of metrics depend on the context and application, and whether a predictive mechanistic model exists.  ...  Since many of these applications involve sampling of populations, we also review how diversity in small samples is related to the diversity in the entire population.  ...  Acknowledgments This work was supported in part by grants from the NSF through grant DMS-1814364, the Army Research Office through grant W911NF-18-1-0345, and the National Institutes of Health through  ... 
arXiv:1908.08190v1 fatcat:mn2p5yd4j5favbpmr2dhmfyodq

Particle sizing calibration with refractive index correction for light scattering optical particle counters and impacts upon PCASP and CDP data collected during the Fennec campaign

P. D. Rosenberg, A. R. Dean, P. I. Williams, A. Minikin, M. A. Pickering, A. Petzold
2012 Atmospheric Measurement Techniques Discussions  
This method provides mean diameters and widths for OPC bins based upon Mie-Lorenz theory or any other particle scattering theory, without the need for smoothing, despite the highly nonlinear and non-monotonic  ...  This manuscript presents two methods for calibrating OPCs with case studies based on a Passive Cavity Aerosol Spectrometer Probe (PCASP) and a Cloud Droplet Probe (CDP), both of which are operated on the  ...  entity of NERC and the Met Office.  ... 
doi:10.5194/amtd-5-97-2012 fatcat:gzocf2yp6rekheophn4nvuptv4

Quantifying the hygroscopic properties of cyclodextrin containing aerosol for drug delivery to the lungs

Calum Patrick Fred Day, Anatolij Miloserdov, Kate Wildish-Jones, Emma Pearson, Antonia Erika Carruthers
2020 Physical Chemistry, Chemical Physics - PCCP  
Aerosol dynamics is important to quantify in drug delivery to the lungs with the aim of delivering therapeutics to a target location and optimising drug efficacy.  ...  The macrocycle (2-hydroxypropyl)-β-cyclodextrin (2-HP-β-CD)...  ...  Walker and Prof. J. P. Reid in the School of Chemistry at the University of Bristol for the use of software used in aerosol analysis. Thank you to Prof. J. P.  ... 
doi:10.1039/d0cp01385d pmid:32406900 fatcat:7uf5vs5evja6xjxwu6mcgcpmzm

Diversity in Biology: definitions, quantification and models

Song Xu, Lucas Böttcher, Tom Chou
2020 Physical Biology  
The utility of these different metrics or sets of metrics depends on the context and application, and whether a predictive mechanistic model exists.  ...  Since many of these applications involve sampling of populations, we also review how diversity in small samples is related to the diversity in the entire population.  ...  Acknowledgments This work was supported in part by grants from the NSF through Grant DMS-1814364, the Army Research Office through Grant W911NF-18-1-0345, and the National Institutes of Health through  ... 
doi:10.1088/1478-3975/ab6754 pmid:31899899 pmcid:PMC8788892 fatcat:62qm44qkzfarlaufmjqbjyiwpa
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