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Systematic Analysis of Cluster Similarity Indices: How to Validate Validation Measures
[article]
2021
arXiv
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for an extensive list of validation indices. ...
Many cluster similarity indices are used to evaluate clustering algorithms, and choosing the best one for a particular task remains an open problem. ...
Systematic Analysis of Cluster Similarity Indices: How to Validate Validation Measures
The code is available at https://github.com/MartijnGosgens/validation_indices. ...
arXiv:1911.04773v7
fatcat:fiqtqwly7vhqzcsoapx33ioesm
Seizure Control as an Indicator of Therapeutic Usefulness
2000
Canadian Journal of Neurological Sciences
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in all patients, eg., at similar intervals, with similar depth, and by similar personnel. ...
Validity is most threatened in retrospective, uncontrolled studies without systematic outcome assessment. ...
As the NHS3 indicates current seizure severity, define the time frame: e.g. 1-3 months or time since the last clinic visit. ...
doi:10.1017/s0317167100000743
pmid:10830335
fatcat:mksxjgdly5gppltiah4vle4gly
On a preference-based instrumental variable approach in reducing unmeasured confounding-by-indication
2014
Statistics in Medicine
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The bias formula shows that when the cluster size is finite, the IV estimator is asymptotically biased; only when both the number of groups and cluster size go to infinity, the bias disappears. ...
We then derive a closed-form expression of asymptotic bias of the two-stage generalized ordinary least squares estimator when the IVs are valid. ...
Even when IV is valid, an important finding in our bias analysis is that the 2SGLS IV estimator is usually asymptotically biased when the number of clusters goes to infinity but the cluster size is finite ...
doi:10.1002/sim.6404
pmid:25546152
fatcat:y4z5yedp3zca7nb5p57fwetiry
Exploring the high-resolution mapping of gender-disaggregated development indicators
2017
Journal of the Royal Society Interface
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Results show the potential of the approach in producing high-resolution maps of key gender-disaggregated socio-economic indicators, with explained variance through cross-validation being as high as 74- ...
of geolocated demographic and health surveys cluster data and geospatial covariates. ...
Comparison of the results of ANN and BGS when used to model the same indicators shows they have similar performance. ...
doi:10.1098/rsif.2016.0825
pmid:28381641
pmcid:PMC5414904
fatcat:zf4gmtrwyfcpdoi4bi5cfbi5wy
Towards a global scientific brain: Indicators of researcher mobility using co-affiliation data
[article]
2016
arXiv
pre-print
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This paper analyses the potential use of bibliometric data for mapping and applying network analysis to mobility flows. ...
We reflect on the potential uses of bibliometric data to inform research policies with regard to scientific mobility. ...
This algorithm clusters publications that belong to a single author based on a set of similar publication patterns (co-author network, address data, etc.). ...
arXiv:1609.06499v2
fatcat:gxg7jygqdvf5jivqa33cjonzii
Cosmological Distance Indicators
2018
Space Science Reviews
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The next years ahead will be exciting as various cosmological probes reach 1 assess the current tension in H_0 measurements that could indicate new physics. ...
HI intensity mapping has great potential to map BAO distances at z 0.8 and beyond with precisions of a few percent. ...
cluster was completely out of reach. ...
doi:10.1007/s11214-018-0524-3
fatcat:gwyz45bhargudbizrzfii4emcq
What to expect from dynamical modelling of cluster haloes II. Investigating dynamical state indicators with Random Forest
[article]
2022
arXiv
pre-print
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Without a selection in DS, cluster halos have an asymmetric distribution in η, corresponding to an overall positive half-mass bias. ...
We investigate the importances of various dynamical features in predicting the dynamical state (DS) of galaxy clusters, based on the Random Forest (RF) machine learning approach. ...
no selection to dynamical states are made, dynamical modelling of cluster halos tend to be biased towards a higher mass at the tracer median radius. ...
arXiv:2203.15268v1
fatcat:6pk26rcvlncwtg3plq6dgcyp2u
Systematic review of the relationships between combinations of movement behaviours and health indicators in the early years (0-4 years)
2017
BMC Public Health
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It is unclear whether similar relationships exist in younger children. ...
For each health indicator, quality of evidence was assessed by study design using the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) framework. ...
For observational studies, the risk of selection bias, performance bias, selective reporting bias, detection bias, attrition bias, and other biases (e.g., inadequate control for key confounders) were assessed ...
doi:10.1186/s12889-017-4851-1
pmid:29219071
pmcid:PMC5773877
fatcat:ea5stvzpizdm3eq6hg2vzhc3jy
Setting competitiveness indicators using BSC and ANP
2012
International Journal of Production Research
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The analysis of the value chain of companies with similar characteristics in the same sector helps to identify early indicators of competitiveness, which will then be prioritised to the implementation ...
In this sense business analysis is based on the analysis of the company's value chain. 10 12 9 10 11 Augusto et al. (2006) say that in a highly competitive market the organisation must engage in a systematic ...
doi:10.1080/00207543.2012.657964
fatcat:au4oescyebet7dugtt3nad7bua
Bias Properties of Extragalactic Distance Indicators XII: Bias Effects of Slope Differences and Intrinsic Dispersion on Tully-Fisher Distances to Galaxy Clusters with Application to the Virgo Cluster
[article]
2007
arXiv
pre-print
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The Teerikorpi incompleteness bias in the distance modulus of a galaxy cluster that is determined from incomplete data using the Tully-Fisher (TF) method is discussed differently than has been done in ...
A toy cluster is made with zero intrinsic TF dispersion but with slopes that differ between the calibrators and the cluster data, showing the bias caused by incorrect slopes. ...
their analysis of the bias (Tammann, Sandage, & Reindl 2007) , and by others cited therein. ...
arXiv:0712.2066v1
fatcat:4lsrwmdy3vcolkmo57szzrtguq
Against the Grain? Assessing Graduate Labour Market Trends in Germany Through a Task-Based Indicator of Graduate Jobs
2018
Social Indicators Research
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It is supplied in the appendix of this study. Despite the expansion of higher educational attainment between 1999 and 2012, my analysis indicates a rising excess demand for graduate labour. ...
To do so, it deploys a new statistically derived indicator of graduate jobs, based on job skill requirements obtained from worker-reported task data in the German Employment Surveys 2006 and 2012. ...
Neither the derived indicator nor the analysis are free from limitations. Although the approach classifies occupations at a low level of aggregation, skill levels may differ within occupations. ...
doi:10.1007/s11205-018-1839-x
fatcat:7xkr4pevffbylk6ylzpkivjrw4
Halos of Spiral Galaxies. I. The Tip of the Red Giant Branch as a Distance Indicator
2005
Astrophysical Journal
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In four galaxies, the red-giant branch is sufficiently well populated to measure the magnitude of the tip of the red-giant branch (TRGB), a well-known distance indicator. ...
Using both the Sobel edge-detection technique and maximum-likelihood analysis to measure the I-band magnitude of the red giant branch tip, we determine distances to four nearby galaxies: NGC 253, NGC 4244 ...
the luminosity function model is valid in the case of maximum likelihood analysis, and the number of stars used to construct the luminosity function in the case of Sobel edge detection analysis. ...
doi:10.1086/468177
fatcat:qis5uun46bgvrg6bcg3mbyppca
A Universal Trend among Proteomes Indicates an Oily Last Common Ancestor
2012
PLoS Computational Biology
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This trend, obtained from simple considerations (free from sequence reconstruction methods), was corroborated by regression studies within homologous and orthologous protein clusters as well as phylogenetic ...
While indicating an inherent irreversibility in molecular evolution, oil escape also serves as a rare and universal reaction-coordinate for evolution (reinforcing Darwin's principle of Common Descent), ...
chapter = howcite), and is therefore not biased towards specific classification methods. ...
doi:10.1371/journal.pcbi.1002839
pmid:23300421
pmcid:PMC3531291
fatcat:7xzvjyu34vhq3em4n3rckmipzm
Emergy analysis and indicators of sustainable development applied to tourism in central Italy
2001
International Journal of Sustainable Development
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The purpose of this exploratory study was to determine the environmental friendliness of 1,000 respondents in Mauritius and establish consumer perceptions of green products. ...
Looking at the future of green marketing in Mauritius, it examines the dynamic nature of ecologically conscious consumer behaviour. ...
The writing of this paper was supported by the Research Assistant, Nitin Ramphul. ...
doi:10.1504/ijsd.2001.001553
fatcat:qeponw4onje77czupewbbdztsi
Absorption line indices in the UV
2008
Astronomy and Astrophysics
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Based on the comparison with globular cluster data, we select a set of 11 indices blueward of the 2000 Angstrom rest-frame that allows to recover well the ages and the metallicities of the clusters. ...
In order to select indices that can be used as age and/or metallicity indicators for distant galaxies and globular clusters, we compare the models to data of template globular clusters from the Magellanic ...
C.M. is a Marie Curie Excellence Grant Team Leader and ackwnoledges grant MEXT-CT-2006-042754 of the European Community. ...
doi:10.1051/0004-6361:20066907
fatcat:vxtqvk7zo5bpdboqrfqors7dlm
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