💧🌏 Greg Cocks<p>A Methodology For The Multitemporal Analysis Of Land Cover Changes And Urban Expansion Using Synthetic Aperture Radar (SAR) Imagery - A Case Study Of The Aburrá Valley In Colombia<br>--<br><a href="https://doi.org/10.3390/rs17030554" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">doi.org/10.3390/rs17030554</span><span class="invisible"></span></a> <-- shared paper<br>--<br><a href="https://techhub.social/tags/GIS" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GIS</span></a> <a href="https://techhub.social/tags/spatial" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>spatial</span></a> <a href="https://techhub.social/tags/mapping" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>mapping</span></a> <a href="https://techhub.social/tags/SyntheticApertureRadar" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SyntheticApertureRadar</span></a> <a href="https://techhub.social/tags/SAR" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SAR</span></a> <a href="https://techhub.social/tags/remotesensing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>remotesensing</span></a> <a href="https://techhub.social/tags/multitemporalanalysis" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>multitemporalanalysis</span></a> <a href="https://techhub.social/tags/landcover" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>landcover</span></a> <a href="https://techhub.social/tags/landcoverchange" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>landcoverchange</span></a> <a href="https://techhub.social/tags/clustering" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>clustering</span></a> <a href="https://techhub.social/tags/kurtosis" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>kurtosis</span></a> <a href="https://techhub.social/tags/fuzzylogic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>fuzzylogic</span></a> <a href="https://techhub.social/tags/kernelbasedmethod" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>kernelbasedmethod</span></a> <a href="https://techhub.social/tags/machinelearning" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>machinelearning</span></a> <a href="https://techhub.social/tags/spatialanalysis" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>spatialanalysis</span></a> <a href="https://techhub.social/tags/spatiotemporal" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>spatiotemporal</span></a> <a href="https://techhub.social/tags/geostatistics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>geostatistics</span></a> <a href="https://techhub.social/tags/model" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>model</span></a> <a href="https://techhub.social/tags/modeling" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>modeling</span></a> <a href="https://techhub.social/tags/Aburr%C3%A1Valley" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>AburráValley</span></a> <a href="https://techhub.social/tags/Columbia" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Columbia</span></a> <a href="https://techhub.social/tags/urban" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>urban</span></a> <a href="https://techhub.social/tags/urbanexpansion" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>urbanexpansion</span></a> <a href="https://techhub.social/tags/population" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>population</span></a> <a href="https://techhub.social/tags/growth" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>growth</span></a> <a href="https://techhub.social/tags/topography" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>topography</span></a> <a href="https://techhub.social/tags/monitoring" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>monitoring</span></a> <a href="https://techhub.social/tags/satellite" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>satellite</span></a> <a href="https://techhub.social/tags/sentinel" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sentinel</span></a> <a href="https://techhub.social/tags/valley" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>valley</span></a> <a href="https://techhub.social/tags/landuse" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>landuse</span></a> <a href="https://techhub.social/tags/distribution" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>distribution</span></a> <a href="https://techhub.social/tags/infrastructure" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>infrastructure</span></a> <a href="https://techhub.social/tags/building" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>building</span></a> <a href="https://techhub.social/tags/roads" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>roads</span></a> <a href="https://techhub.social/tags/naturalresources" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>naturalresources</span></a> <a href="https://techhub.social/tags/environmental" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>environmental</span></a> <a href="https://techhub.social/tags/conservation" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>conservation</span></a> <a href="https://techhub.social/tags/monitoring" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>monitoring</span></a> <a href="https://techhub.social/tags/multitemporal" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>multitemporal</span></a></p>
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#clustering
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JuliaR<p>👋 Hi all <a href="https://fosstodon.org/tags/Rstats" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Rstats</span></a> enthusiasts!<br>I'm looking for someone who has time now to conduct a review of a piece of software for Journal of Open Source Software (JOSS). Details are here:<br><a href="https://github.com/openjournals/joss-reviews/issues/7319" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">github.com/openjournals/joss-r</span><span class="invisible">eviews/issues/7319</span></a></p><p>The review process is quite simple - you get a checklist and you run some tests. It's all open, on GitHub.</p><p><a href="https://fosstodon.org/tags/PeerReview" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PeerReview</span></a> <a href="https://fosstodon.org/tags/softwaredevelopment" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>softwaredevelopment</span></a> <a href="https://fosstodon.org/tags/OpenSource" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>OpenSource</span></a> <a href="https://fosstodon.org/tags/programming" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>programming</span></a> <a href="https://fosstodon.org/tags/clustering" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>clustering</span></a> <a href="https://fosstodon.org/tags/DataScience" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>DataScience</span></a> <a href="https://fosstodon.org/tags/Bioinformatics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Bioinformatics</span></a></p>
Kevin Karhan :verified:<p><span class="h-card" translate="no"><a href="https://m.ai6yr.org/@ai6yr" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>ai6yr</span></a></span> <span class="h-card" translate="no"><a href="https://techtoots.com/@dthacker9" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>dthacker9</span></a></span> <span class="h-card" translate="no"><a href="https://oxytodon.com/@fuchsiii" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>fuchsiii</span></a></span> I just found them cheap as surplus - there are also others from Dell (WYSE), Fujitsu (Futro) & IGEL.</p><p>Basically almost all of them are cheap (like €50 at most, sometimes <€10 in a 10-pack lot) and fanless, so ideal to do some <a href="https://infosec.space/tags/BareMetal" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>BareMetal</span></a> <a href="https://infosec.space/tags/clustering" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>clustering</span></a> or just to have chugging along silently in the background...</p>
Kevin Karhan :verified:<p><span class="h-card" translate="no"><a href="https://infosec.exchange/@perry_mitchell" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>perry_mitchell</span></a></span> I'd avoid not just <a href="https://infosec.space/tags/SMR" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SMR</span></a> but all <a href="https://infosec.space/tags/Helium" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Helium</span></a>-filled drives as a matter of principle.</p><ul><li>Also isn't <a href="https://infosec.space/tags/UnRaid" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>UnRaid</span></a> that weird <a href="https://infosec.space/tags/KVM" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>KVM</span></a>-Distro?</li></ul><p>I mean, I know <a href="https://infosec.space/tags/trueNAS" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>trueNAS</span></a> SCALE & <a href="https://infosec.space/tags/ProxMox" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ProxMox</span></a> doing <a href="https://infosec.space/tags/ZFS" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ZFS</span></a> + <a href="https://infosec.space/tags/Ceph" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Ceph</span></a> for <a href="https://infosec.space/tags/clustering" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>clustering</span></a> and <a href="https://infosec.space/tags/redundancy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>redundancy</span></a>...</p>
Mike D.<p><span class="h-card" translate="no"><a href="https://mastodon.social/@werefreeatlast" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>werefreeatlast</span></a></span> <br>I'm waiting on a similar sized dell to use as a media server. I will be running Ubuntu as well.</p><p>Many people use these to experiment with <a href="https://kolektiva.social/tags/clustering" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>clustering</span></a>. I've read a lot and watched some videos about clustering with <a href="https://kolektiva.social/tags/Proxmox" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Proxmox</span></a>.</p><p>-edited for grammar</p>
Fabrice Tshimanga<p>4/n</p><p>Reverting our General Distance matrix into the General Similarity matrix yields an ambiguous spectrum, whose eigenvalues do not help to determine the number of clusters in the data.<br>But repeating clustering and tracing which subjects consistently get clustered together, actually yields the right information, encoded in a co-occurrence matrix.<br>This latter is quite evidently composed of 5 main clusters.<br>Our second approach, affinity propagation, found autonomously 7 clusters, that are mainly finer grained partitions of the former 5.</p><p><a href="https://neuromatch.social/tags/machinelearning" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>machinelearning</span></a> <a href="https://neuromatch.social/tags/clustering" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>clustering</span></a></p>
Fabrice Tshimanga<p>3/n</p><p>We thus decided to use the General Distance Measure to compute pairwise similarities between our 172 subjects, and obtained a matrix, which as math savy people know, is also the description of a network (an "adjacency matrix" for a "weighted undirected graph").<br>The problem was then to find cliques, communities or clusters of similar patients in such a network, and we used spectral clustering.<br>Spectral clustering is a family of techniques that use spectra of matrices describing networks, i.e. use eigenvalues of matrices to understand the structure of those networks.</p><p><a href="https://neuromatch.social/tags/spectralanalysis" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>spectralanalysis</span></a> <a href="https://neuromatch.social/tags/spectralclustering" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>spectralclustering</span></a> <a href="https://neuromatch.social/tags/clustering" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>clustering</span></a> <a href="https://neuromatch.social/tags/neuroscience" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>neuroscience</span></a></p>
Fabrice Tshimanga<p>1/n<br>Our pre-print is finally out!<br>Here's my first <a href="https://neuromatch.social/tags/paperthread" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>paperthread</span></a> 🧵<br>In this work, co-authors and I clustered ischaemic stroke patients profiles, and recovered common patterns of cognitive, sensorimotor damage.</p><p>...Historically many focal lesions to specific cortical areas were associated with specific distinction, but most strokes involve subcortical regions and bring multivariate patterns of deficits.<br>To characterize those patterns, many studies have turned to correlation analysis, factor analysis, PCA, focusing on the relations among variables==domains of impairments...</p><p><a href="https://www.medrxiv.org/content/10.1101/2023.11.08.23297808" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">medrxiv.org/content/10.1101/20</span><span class="invisible">23.11.08.23297808</span></a></p><p><a href="https://neuromatch.social/tags/stroke" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>stroke</span></a> <a href="https://neuromatch.social/tags/neuroscience" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>neuroscience</span></a> <a href="https://neuromatch.social/tags/machinelearning" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>machinelearning</span></a> <a href="https://neuromatch.social/tags/clustering" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>clustering</span></a></p>
Karsten Schmidt<p><a href="https://mastodon.thi.ng/tags/HowToThing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HowToThing</span></a> #006 - Clustering arbitrary n-dimensional data using <a href="https://thi.ng/k-means" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">thi.ng/k-means</span><span class="invisible"></span></a> and customizable distance functions and/or centroid strategies. For example, here to cluster 20 world cities into 5 groups based on their latitude/longitude...</p><p>Snippet source code:<br><a href="https://gist.github.com/postspectacular/3a7970af491304fe7262e4701efa7d52" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">gist.github.com/postspectacula</span><span class="invisible">r/3a7970af491304fe7262e4701efa7d52</span></a></p><p>For a visual example (also fully commented) using thousands of items and SVG output, check out:</p><p>Demo:<br><a href="https://demo.thi.ng/umbrella/kmeans-viz/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">demo.thi.ng/umbrella/kmeans-vi</span><span class="invisible">z/</span></a></p><p>Source code:<br><a href="https://github.com/thi-ng/umbrella/blob/develop/examples/kmeans-viz/src/index.ts" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">github.com/thi-ng/umbrella/blo</span><span class="invisible">b/develop/examples/kmeans-viz/src/index.ts</span></a></p><p><a href="https://mastodon.thi.ng/tags/ThingUmbrella" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ThingUmbrella</span></a> <a href="https://mastodon.thi.ng/tags/TypeScript" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>TypeScript</span></a> <a href="https://mastodon.thi.ng/tags/JavaScript" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>JavaScript</span></a> <a href="https://mastodon.thi.ng/tags/DataViz" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>DataViz</span></a> <a href="https://mastodon.thi.ng/tags/Clustering" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Clustering</span></a> <a href="https://mastodon.thi.ng/tags/GIS" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GIS</span></a> <a href="https://mastodon.thi.ng/tags/Tutorial" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Tutorial</span></a></p>
Evan Light<p>Federated link aggregators should not own individual topics. Topics should belong to the entire fedi.</p><p>Instance owned topics is just another form of centralization. </p><p>We should not only discourage topic diaspora (e.g., a "gaming" topic on beehaw is separate from a gaming topic on another instance) but engineer solutions to *allow* and default unification of content by topic across the fedi for link aggregation (but not force this).</p><p>(De)federation then becomes how we keep topics safe for our communities: blocking posts and comments from demonstrably unsafe instances.</p><p>This is a CAP distributed system problem. My instincts say that federated link aggregation is a different enough problem from federated blogging (mastodon) that we need federated instances to share content via a consensus algorithm and not the mastodon style of federation.</p><p>I wonder about the practicalities of making this work in the truly heterogenous system of the <a href="https://tenforward.social/tags/fediverse" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>fediverse</span></a>. </p><p>Perhaps by having the federation members/instances themselves share capability and capacity metadata with the cluster so as to load balance intelligently? The alternative could be an unintentional DDOS due to a massive instance going offline, shedding traffic to instances too small to handle the load.</p><p><a href="https://tenforward.social/tags/linkaggregation" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>linkaggregation</span></a> <a href="https://tenforward.social/tags/cap" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>cap</span></a> <a href="https://tenforward.social/tags/distributedsystems" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>distributedsystems</span></a> <a href="https://tenforward.social/tags/clustering" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>clustering</span></a> <a href="https://tenforward.social/tags/federation" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>federation</span></a> <a href="https://tenforward.social/tags/fediverse" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>fediverse</span></a> <a href="https://tenforward.social/tags/decentralization" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>decentralization</span></a></p>
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