As a screenshot with a tweet could easily be a fake, an author of a tweetcan later repudiate it simply by deleting it, and no proof that the tweet ever existed can be provided,except perhaps by the operator itself.

compute the differencesbetween versions of the document to visualise the change history

we can reconstruct the state of thedocument at any past moment in time

If permanent deletion of records is required (e.g. to delete per-sonal data in compliance with the GDPR right to be forgotten [62]),an immutable event log requires extra care.

The act of minting an LSID indicates that you intend to try to make it permanent or at least never re-use it for another resource.

Persistence

Wittenburg, P., Hellström, M., Zwölf, C.-M., Abroshan, H., Asmi, A., Di Bernardo, G., Couvreur, D., Gaizer, T., Holub, P., Hooft, R., Häggström, I., Kohler, M., Koureas, D., Kuchinke, W., Milanesi, L., Padfield, J., Rosato, A., Staiger, C., van Uytvanck, D., & Weigel, T. (2017). Persistent identifiers: Consolidated assertions. Status of November, 2017. Zenodo. https://doi.org/10.5281/zenodo.1116189

ORCID was first announced in 2009

The developer and administrator of the DOI system is the International DOI Foundation (IDF), which introduced it in 2000

Persistent

A Uniform Resource Name (URN) is a Uniform Resource Identifier (URI) that uses the urn scheme. URNs are globally unique persistent identifiers assigned within defined namespaces so they will be available for a long period of time, even after the resource which they identify ceases to exist or becomes unavailable

existence, and ability to be used in services outside the direct control of the issuing assigner, without a stated time limit

— persistence, if material is moved, rearranged, or bookmarked,

‘Dyfal donc a dyr y garreg’, we say in Welsh – ‘persistent knocking will break the stone’. In other words, perseverance pays in the end.

let me show you how quickly our brains can redefine normality, even at the simplest thing the brain does, which is color. 00:05:29 So if I could have the lights down up here. I want you to first notice that those two desert scenes are physically the same. One is simply the flipping of the other. Now I want you to look at that dot between the green and the red. And I want you to stare at that dot. Don't look anywhere else. We're going to look at it for about 30 seconds, which is a bit of a killer in an 18-minute talk. (Laughter) But I really want you to learn. 00:05:55 And I'll tell you -- don't look anywhere else -- I'll tell you what's happening in your head. Your brain is learning, and it's learning that the right side of its visual field is under red illumination; the left side of its visual field is under green illumination. That's what it's learning. Okay? Now, when I tell you, I want you to look at the dot between the two desert scenes. So why don't you do that now? (Laughter) 00:06:21 Can I have the lights up again? I take it from your response they don't look the same anymore, right? (Applause) Why? Because your brain is seeing that same information as if the right one is still under red light, and the left one is still under green light. That's your new normal. Okay? So, what does this mean for context? It means I can take two identical squares, put them in light and dark surrounds, and the one on the dark surround looks lighter than on the light surround. 00:06:47 What's significant is not simply the light and dark surrounds that matter. It's what those light and dark surrounds meant for your behavior in the past.

Social networks may thus be “sticky” because social integration provides both benefits that encourage staying and social deterrents to leaving, increasing the chances of persistence.

persistence is the product of not only individual processes but also relational ones

Persisting across apps Your notifications can persist across multiple apps / page reloads, as long as they use this library. This is useful for a scenario where you show a notification and then redirect the browser to a different application, or trigger a full reload of the page. This is completely automatic and uses session storage.

by adopting a replicator/interactor framework, where ‘perpetuation’ can mean differential persistence – persistence doesn’t require continuous presence – replication is taken to include reproduction, recurrence and re-production – and processes such as the nitrogen cycle can be considered entities that are perpetuated (the replicators, as it were)

it comes to Gaia, then, perhaps the relevant unit of selection is the process that multiple and redundant species implement – not the collective made up of those species itself. A

So we need not restrict ourselves to material reproducers or replicators (the inner four ellipses) to consider level-specific properties to be adaptations – ‘functions’ resulting from evolution by natural selection

are thus differentially perpetuated through the success of a human-microbial holobiont, interacting with its environme

One element in this approach is multilevel selection theory sketched above, now illustrated in the figure below.

Vitaly Friedman loves beautiful content and doesn’t like to give in easily.

In Trailblazer, models are completely empty. They solely contain associations and finders. No business logic is allowed in models.

Take 3, Previously attempted in 2012 (#8189) and 2015 (#19709). This new version uses ActiveModel Attributes API.

According to the endurantist view, material objects are persisting three-dimensional individuals wholly present at every moment of their existence

The perdurantist view is that an individual has distinct temporal parts throughout its existence.

It's easy to persist the entire application state in a way that is backwards-compatible, so persisted states can survive application changes.

Considerable research indicates that college students are bothmore likely to persist and to perform at high academic levelswhen they perceive themselves to be members of a cooperativeand supportive learning community (Kuh, 2009; Tinto, 2006;Zhao & Ku, 2004)

The clinical effects of pneumonia have been linked to increased risk of cardiovascular disease up to 10-year follow-up16 and it is likely that cases infected via respiratory virus outbreaks will experience similar adverse outcomes. Therapeutic use of corticosteroids further augments the possibility of adverse cardiovascular events. However, long-term follow-up data concerning the survivors of respiratory virus epidemics are scarce. Lipid metabolism remained disrupted 12 years after clinical recovery in a metabolomic study amongst 25 SARS survivors,17 whereas cardiac abnormalities observed during hospitalisation in eight patients with H7N9 influenza returned to normal at 1-year follow-up.

Deleting Data Collections

Cloninger has trained rats and mice in mazes to have persistence by carefully not rewarding them when they get to the finish. “The key is intermittent reinforcement,” says Cloninger. The brain has to learn that frustrating spells can be worked through. “A person who grows up getting too frequent rewards will not have persistence, because they’ll quit when the rewards disappear.”

Through thesoup, new and unanticipated tools can accessdomain objects. These tools might need to be notified of statechanges which do not yet trigger an observer notification.As thesoupcan contain objects from arbitrary classes, tooldevelopers can not manually adapt these domain classes totrigger notifications.