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Evolution of IPv6 Internet topology with unusual sudden changes

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Chinese Physics B 2013年第7期22卷 602-609页

作者：艾均赵海 Kathleen M. carley 苏湛李辉 College of Information Science and Engineering Northeastern University Institute for Software Research Carnegie Mellon University

The evolution of Internet topology is not always smooth but sometimes with unusual sudden changes. Consequently, identifying patterns of unusual topology evolution is critical for Internet topology modeling and simulation. We analyze IPv6 Internet topology evolution in IP-level graph to demonstrate how it changes in uncommon ways to restructure the Internet. After evaluating the changes of average degree, average path length, and some other metrics over time, we find that in the case of a large-scale growing the Internet becomes more robust; whereas in a top–bottom connection enhancement the Internet maintains its efficiency with links largely decreased.

关键词： scale-free network Internet topology evolution unusual evolution of Internet topology complex network analysis

Ventricular Arrhythmia in the Fontan Circulation:Prevalence,Risk Factors and Clinical Implications

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Congenital Heart Disease 2023年第5期18卷 507-523页

作者： Charis Tan Diana Zannino carley Clendenning Sophie Offen Thomas LGentles Julian Ayer David Tanous Vishva Wijesekera Leeanne Grigg David Celermajer Mark McGuire Yves d’Udekem Rachael Cordina Department of Cardiothoracic Surgery Royal Prince Alfred HospitalCamperdownAustralia Sydney Medical School University of SydneyCamperdownAustralia Clinical Epidemiology and Biostatistics Unit Murdoch Children’s Research InstituteParkvilleAustralia Department of Cardiology Royal Prince Alfred HospitalCamperdownAustralia Department of Paediatric Cardiology Starship HospitalAucklandNew Zealand Department of Paediatric Cardiology The Children’s Hospital at WestmeadWestmeadAustralia Department of Cardiology Westmead HospitalWestmeadAustralia Adult Congenital Heart Disease Unit The Prince Charles HospitalBrisbaneAustralia Department of Cardiology The Royal Melbourne HospitalMelbourneAustralia Heart Research Institute CamperdownAustralia Department of Cardiac Surgery The Royal Children’s Hospital MelbourneParkvilleAustralia Department of Paediatrics The University of MelbourneParkvilleAustralia

Objective:Sudden cardiac death(SCD)and malignant ventricular arrhythmia(VA)are increasingly recognized as important issues for people living with a Fontan circulation,but data are *** sought to characterize the cohort who had sudden cardiac death,most likely related to VA and/or documented VA in the Australia and New Zealand Fontan Registry including risk factors and clinical ***:A retrospective cohort study was *** criteria were documented non-sustained ventricular tachycardia,sustained ventricular tachycardia,ventricular fibrillation,resuscitated cardiac arrest or SCD>30 days post-Fontan ***:Of 1611 patients,20(1.2%)had VA;14(1.0%)had VA without SCD and 6(<1%)had SCD(6%of all deaths recorded in Registry;5 of those had documented VA at the time of arrest and 1 was presumed to be VA-associated).The median age at first VA was 20.5(14–32)years,10(50%)were females,and the median age at Fontan operation was 8(4–17)*** univariable analysis,hypoplastic left heart syndrome(p=0.03)and older age Fontan operation(p<0.001)were associated with *** Fontan era(p<0.003),atriopulmonary Fontan(p<0.001),pre-Fontan atrioventricular valve repair(p=0.013)pre-or post-Fontan atrial arrhythmia(p=0.010)were associated with *** with VA had a 3 times higher risk of death or heart transplant(HR 3.27(1.19,8.98),p=0.02).Conclusions:A proportion of people living with a Fontan circulation have malignant *** VA screening in this cohort is *** data are needed to aid risk stratification.

关键词： Fontan congenital cardiac arrhythmia sudden cardiac death ventricular tachyarrhythmia

Visualization of Disciplinary Profiles: Enhanced Science Overlay Maps

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Journal of Data and Information Science 2017年第3期2卷 68-111页

作者： Stephen carley Alan L.Porter Ismael Rafols Loet Leydesdorff Search Technology Inc. Program in Science Technology & Innovation Policy (STIP)School of Public PolicyGeorgia Institute of Technology Ingenio (CSIC-UPV) Universitat Politècnica de València Science Policy Research Unit (SPRU) University of Sussex Amsterdam School of Communication Research (ASCoR) University of Amsterdam

Purpose： The purpose of this study is to modernize previous work on science overlay maps by updating the underlying citation matrix, generating new clusters of scientific disciplines, enhancing visualizations, and providing more accessible means for analysts to generate their own maps Design/methodology/approach： We use the combined set of 2015 Journal Citation Reports for the Science Citation Index （n of journals = 8,778） and the Social Sciences Citation Index （n = 3,212） for a total of 11,365 journals. The set of Web of Science Categories in the Science Citation Index and the Social Sciences Citation Index increased from 224 in 2010 to 227 in 2015. Using dedicated software, a matrix of 227 × 227 cells is generated on the basis of whole-number citation counting. We normalize this matrix using the cosine function. We first develop the citing-side, cosine-normalized map using 2015 data and VOSviewer visualization with default parameter values. A routine for making overlays on the basis of the map （＂wc ***＂） is available at http：//***/wc 15/***. Findings： Findings appear in the form of visuals throughout the manuscript. In Figures 1 9 we provide basemaps of science and science overlay maps for a number of companies, universities, and technologies. Research limitations： As Web of Science Categories change and/or are updated so is the need to update the routine we provide. Also, to apply the routine we provide users need access to the Web of Science. Practical implications： Visualization of science overlay maps is now more accurate and true to the 2015 Journal Citation Reports than was the case with the previous version of the routine advanced in our ***/value： The routine we advance allows users to visualize science overlay maps in VOSviewer using data from more recent Journal Citation Reports.

关键词： Science overlay maps Science visualization Scientometrics Bibliometrics Interdisciplinary research Multidisciplinarity Research policy Research management

A Multi-match Approach to the Author Uncertainty Problem

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Journal of Data and Information Science 2019年第2期4卷 1-18页

作者： Stephen F.carley Alan L.Porter Jan L.Youtie Search Technology Inc Georgia Institute of Technology Enterprise Innovation Institute Georgia Institute of Technology

Purpose: The ability to identify the scholarship of individual authors is essential for performance evaluation. A number of factors hinder this endeavor. Common and similarly spelled surnames make it difficult to isolate the scholarship of individual authors indexed on large databases. Variations in name spelling of individual scholars further complicates matters. Common family names in scientific powerhouses like China make it problematic to distinguish between authors possessing ubiquitous and/or anglicized surnames(as well as the same or similar first names). The assignment of unique author identifiers provides a major step toward resolving these difficulties. We maintain, however, that in and of themselves, author identifiers are not sufficient to fully address the author uncertainty problem. In this study we build on the author identifier approach by considering commonalities in fielded data between authors containing the same surname and first initial of their first name. We illustrate our approach using three case ***/methodology/approach: The approach we advance in this study is based on commonalities among fielded data in search results. We cast a broad initial net—i.e., a Web of Science(WOS) search for a given author's last name, followed by a comma, followed by the first initial of his or her first name(e.g., a search for ‘John Doe' would assume the form: ‘Doe, J'). Results for this search typically contain all of the scholarship legitimately belonging to this author in the given database(i.e., all of his or her true positives), along with a large amount of noise, or scholarship not belonging to this author(i.e., a large number of false positives). From this corpus we proceed to iteratively weed out false positives and retain true positives. Author identifiers provide a good starting point—e.g., if ‘Doe, J' and ‘Doe, John' share the same author identifier, this would be sufficient for us to conclude these are one and the same individual. We fin

关键词： Name disambiguation Author identifiers Multi-match approach

Using Machine Learning to Develop a Fully Automated Soybean Nodule Acquisition Pipeline(SNAP)

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Plant Phenomics 2021年第1期3卷 197-208页

作者： Talukder Zaki Jubery Clayton N.carley Arti Singh Soumik Sarkar Baskar Ganapathysubramanian Asheesh K.Singh Department of Mechanical Engineering Iowa State UniversityAmesIAUSA Department of Agronomy Iowa State UniversityAmesIAUSA

Nodules form on plant roots through the symbiotic relationship between soybean(Glycine max ***.)roots and bacteria(Bradyrhizobium japonicum)and are an important structure where atmospheric nitrogen(N2)is fixed into bioavailable ammonia(NH3)for plant growth and *** quantification on soybean roots is a laborious and tedious task;therefore,assessment is frequently done on a numerical scale that allows for rapid phenotyping,but is less informative and suffers from *** report the Soybean Nodule Acquisition Pipeline(SNAP)for nodule quantification that combines RetinaNet and UNet deep learning architectures for object(i.e.,nodule)detection and *** was built using data from 691 unique roots from diverse soybean genotypes,vegetative growth stages,and field locations and has a good model fit(R2=0:99).SNAP reduces the human labor and inconsistencies of counting nodules,while acquiring quantifiable traits related to nodule growth,location,and distribution on *** ability of SNAP to phenotype nodules on soybean roots at a higher throughput enables researchers to assess the genetic and environmental factors,and their interactions on nodulation from an early development *** application of SNAP in research and breeding pipelines may lead to more nitrogen use efficiency for soybean and other legume species cultivars,as well as enhanced insight into the plant-Bradyrhizobium relationship.

关键词： soybean breeding cultivar

Simple DSP Implementation of Maximum Power Pointer Tracking and Inverter Control for Solar Energy Applications

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Journal of Power and Energy Engineering 2016年第9期4卷 61-76页

作者： Woonki Na Thomas carley Luke Ketcham Brendan Zimmer Pengyuan Chen Department of Electrical and Computer Engineering California State University Fresno CA USA Caterpillar Inc. Peoria IL USA Robert Bosh Inc. Detroit MI USA

In this paper, a simple Digital Signal Processor (DSP) based Maximum Power Pointer Tracking (MPPT) control and Inverter Control is presented for solar energy applications, especially photovoltaic and wind energy systems. The proposed MPPT controlled boost converter is able to reduce the inrush current and the overshoot of the output voltage of the system. Details of the proposed Maltab-Simulink based MPPT and Inverter Control are shown and implemented using a DSP. The proposed system is analyzed and simulated for verification. To validate the system, a 100 W prototype test-bed is built and tested. The results show that the proposed system can be applicable for solar energy applications.

关键词： DSP MPPT Inverter Solar Energy