Hoy en día hay un resurgir del estoicismo. ¿Por qué atrae el estoicismo?

El estilo de vida al cual estamos acostumbrados busca por encima de todo rendir culto al diosconsumo, buscamos acaparar objetos materiales. Cuando escribo estas líneas, falta un mes para lasfestividades de Navidad y el “Black Friday” acaba de triunfar, a pesar de la pandemia, un año más. Noshan hecho creer que la felicidad está unida a la capacidad de poseer objetos materiales o bien tenerun empleo bien remunerado que nos otorgue prestigio personal para así situarnos en un lugardestacado de la sociedad. Nuestros niños son educados en que se les va a valorar por aquello quetienen y no por lo que son. Esto es materialismo puro

Símbolos mágicos de Egipto

Manuel J. Ruiz Torres

Darle a un hijo una habilidad es mejor que darle mil piezas de oro.Proverbio chinoMe lo contaron y lo olvidé; lo vi y lo entendí; lo hice y lo aprendí.ConfucioSi no quieres que se sepa, no lo hagas.Proverbio chinoCon buenas palabras se puede negociar, pero para engrandecerse se requieren buenas obras.Lao-TseNo pretendas apagar con fuego un incendio, ni remediar con agua una inundación.ConfucioAquello que para la oruga es el fin del mundo, para el resto del mundo se llama mariposa.Lao-TseCuando veáis a un hombre sabio, pensad en igualar sus virtudes. Cuando veáis a un hombre desprovisto de virtud, examinaos vosotros mismos.ConfucioEl agua hace flotar a un barco y también puede hundirlo.Proverbio chinoExígete mucho a ti mismo y espera poco de los demás. Así te ahorrarás disgustos.ConfucioAquel que obtiene una victoria sobre otro hombre es fuerte, pero quien obtiene una victoria sobre sí mismo es poderoso.Lao-TseRecopilado por Elena Sabidó

velocidad que necesitan para mantenerse en equilibrio gravitatorio (300 km/sg)

Los cálculos actuales precisan la densidad de la materia oscura en una masa equivalente a 300 protones por litro

La materia oscura se puede denominar fría o caliente en función de la velocidad con que se mueven las partículas que la componen

Es mejor equivocarse que permanecer inactivo por miedo a que no salga bien

No voy a sentirme mal si algo no me sale bien,he aprendido a derrapar y a chocar con la pared.

Lo que me llevará al final serán mis pasos, no el camino, no ves que siempre vas detrás cuando persigues al destino..

Antes de que cuente diez

Peter Murray-Rust (University of Cambridge)

Figure1:TheContentMinepipeline.

[L3] http://contentmine.org

commission

Innovative scientists carrying outmining risk their universities being cut off by publishers

there’s huge politico-legal opposition, because thepapers are copyrighted, normally by the publishers

Since facts are uncopyrightable

TheWikidata-enhanced facts will be stored in the public Zenododatabase for all to use

We see Wikidata as the future of much scientific fact,

We’ve spent twoyears creating the code and pipeline and are now starting toprocess open and subscription articles automatically

ContentMine.org [3] to read the whole scientific lit-erature and extract the facts on a daily basis

it’s still possible to recover a vast amount of datawith heuristics such as natural language processing and dia-gram processing

We know of researchers who spend their whole timeturning this back into computable information

Data is collected from digital instruments,summarised to diagrams and turned into pixels (PNG, JPG)with total loss of data – even from summary diagrams(plots).

Most text isborn digital (Word, TeX) and straightforward to process butturned into PDF

Scientists write in narrative text,

cts (species, diseases, drugs, countries, organi-sations) resulting from about one trillion USD of fundedresearch. But they aren’t properly used – for example theZika outbreak was predicted 30 years ago [1] but in ascanned PDF behind a paywall so was never broadcast.

Scholarly publications, especially science and medicine,have huge amounts of untapped knowledge, but it’s atechnical challenge to extract it and there’s a politicalfight in Europe as to whether we can legally do it

As early as 1973, Hewitt et al. [2] pro-posed the (abstract) actor model toaddress the problems of concurrencyand distribution. This model definesentities called actors, which are concur-rent, isolated and solely interact via net-work-transparent message passingbased on unique identifiers.

genome data, temperature measurements, stock market prices,population and income statistics

References:[1] T. Hey, S. Tansley, K. Tolle, eds.:“The Fourth Paradigm: Data-intensiveScientific Discovery”, MicrosoftResearch 2009.[2] S. Proell, A. Rauber: “Citable byDesign - A Model for Making Data inDynamic Environments Citable”, inDATA 2013, 2013.[3] S. Proell, A. Rauber: “ScalableData Citation in Dynamic LargeDatabases: Model and ReferenceImplementation”, in IEEE BigData2013, 2013.

Assigning persistentidentifiers to the query, each dataset canbe uniquely referenced

Our approach is based onversioned and timestamped data, whereall inserts, updates and deletes of recordswithin a dataset are recorded

An experi-ment can only be reproduced and veri-fied if the same subset can be retrievedlater.

Data used to be condensed into humanreadable form, by aggregating sourcedata into tables and graphs

With theincreasing focus on repeatability andverifyability in the experimental sci-ences, providing access to the under-lying data is becoming essential

Members

assigning persistent identifiers, such as digital object identifiers (DOIs), to data sets

hinders novice users

there is still nosingle point of access for querying the over 200 SPARQL repositories

organizations committing to use itscore principles for exposing and inter-linking Big Data for seamlessexchange, integration, and reuse [2]

SemanticWeb.org http://www.semanticweb.org/

SWoogle: Semantic Web Search. http://swoogle.umbc.edu/

la Web Semántica no goza de excesiva popularidad entre los creadores de sedes web debido a que no está pensada para seres humanos, sino para agentes o programas que recorran la World Wide Web e infieran nuevos datos

SWoogle: Semantic Web Search http://swoogle.umbc.edu/

Haystack del MIT,

Los documentos web se codifican mediante lenguajes de metadatos y ontologías, lenguajes semánticos que aportan representaciones compartidas de conocimiento en forma de conceptos relacionados y reglas de inferencia lógicas

En los albores de la Web nadie pensó en etiquetar categorías y añadir metadatos, pues la mayor parte del contenido de la Web estaba diseñado para leer

hay muchas líneas de trabajo abiertas en relación con la Web Semántica, líneas que tienen que ver con los lenguajes semánticos y lenguajes de definición de ontologías, metodologías de desarrollo e integración de ontologías y otros vocabularios de dominios concretos del conocimiento, agentes, tecnologías y servicios web, etc

La realidad es que todavía estamos muy lejos de conseguir, incluso, algunos de los planteamientos menos complejos de la Web Semántica

la corte suprema de Estados Unidos rechazo en un juicio el reclamo realizado por Guglielmo Marconi y este veredicto toco a Nikola Tesla., a quien se le acredita la invención de la radio. Finalmente, en 1943, la Corte Suprema de los EE..UU., dictaminó que la verdadera patente le pertenecería a Tesla, pero la idea de que Marconi había sido el creador ya estaba instalada

debido a su poco conocimiento de la física

Nikola Tesla empezó sus estudios en 1875 en la carrera de Ingeniería Eléctrica en la Universidad de Graz, estudiando el uso de la corriente alterna. Su graduación es esta casa de estudio aún está en entredicho por cuanto algunas fuentes indican que se graduó como Ingeniero sin embargo, la universidad de Graz se pronunció indicando que Nikola Tesla solo estudio entre el segundo y tercer año ya que dejo de asistir a clase

«El Tesoro de Priamo» fue encontrado en la fase conocida como Troya II, mientras que el rey Priamo que aparece en la Iliada, habría sido habitante de la fase de Troya VI o VII, que fueron ocupadas cientos de años después

Alejandro tenía el hábito de inclinar ligeramente la cabeza sobre el hombro derecho, de baja estatura con cutis blanco, cabello ondulado de color castaño claro y ojos heterócromos, el izquierdo marrón y el derecho gris, que no se sabe si eran de nacimiento o por un traumatismo craneal.

contrario a cualquier tipo de erudición e incluso de cultura, siempre prefirió expresarse mediante la acción, el comportamiento y las elecciones concretas, más que mediante textos escritos: a un discípulo de Zenón de Elea que sostenía la inexistencia del movimiento, le respondió poniéndose en pie y echándose a andar.

aristoteles y alejandro magno

año 343 a.C

año 343 a.C. cuando Filipo II confió la educación de su vástago de trece años al filósofo más grande de la época: Aristóteles, que se haría cargo de su educación durante tres años

Durante los 8 años que duraría el encargo

1545-1600 Giordano Bruno

Some contributors suggest using title case only for main titles, such as the title of the book and possibly chapters, but using sentence case for lower level headings

several major publications use sentence case for titles

I vividly remember being taught at school to double space after a full stop and single space after a comma, colon or semi-colon

. The automatically extracted details for references that appeared in my .bib file do not seem to be as complete as those provided by the technique above.

Anonymous29 October 2013 at 20:201. Install Mendeley (It is Free).2. Open it.3. Select all PDF files.4. Drag and drop all the files into Mendeley Interface5. It is done, It will sort all your references.6. You can Export .bib file now and use it in Jabref, Lyx or Latex.

add the following to netqinf.txt then it should search IEEE Xplore for the title

UPDATE: After a couple of months of getting used to cb2bib and using it to produce a document I'm not really finding the need to use JabRef at all! The 'citer' facility of cb2bib is actually really good.

JabRef is basically a database management tool for references that stores its database in bibtex format

I settled on JabRef because: it's free, it's open source, it's lightweight, it's cross-platform and it handles bibtex format natively (which is what I need for it to integrate with latex).

The changed bibtex file and added references will need to be "commited" to the version control repository.

Click Network query to retrieve all the info about the file from the web

Add the saved file to my bazaar version control system

Search for the document

Download the document

Gathering references

but I've found it to also be really good for browsing references and citing whilst writing a document. I changed some of the default setup to help it retrieve data from the net

Latex - (pronounced "lay-tec")

Unfortunately having reusable sections of content is almost the opposite of having the consistent and coherent narrative that a good thesis (allegedly) requires.

but I found that my large folder of pdf files all referenced from a bibtex file and managed using cb2bib

Version control This was really key for me

WoS journals have many limitations for humanities

highlight the matching ones in the original files

Several tools exist that will attempt to parse a formatted text bibliography into the BibTeX format. These are somewhat experimental,

Standard BibTeX entry and field types

41 asociaciones de estudiantes en 2020.

Select a source type

APA formatting for papers There are certain formatting rules you must adhere to when writing a paper in APA format. The basic requirements are: Times New Roman 12 pt Double line spacing One-inch (2.54 cm) margins Left-aligned running head with a shortened title and page number In addition to these general rules, there are more specific requirements for formatting the title page, running head, abstract, reference page and headings and subheadings.

The format differs depending on the source type, but every reference begins in the same way: with the author’s last name and initials, the publication year or date, and the title of the source.

Most free checkers will only detect directly copied-and-pasted content. If plagiarized content has even been slightly tweaked, these checkers will likely not detect it. “Freemium” checkers appear to be free at first glance, but have a lot of add-ons and features that are paid, making it unlikely that you will get everything you need for free.

In 2006, the Brookings Institute accused Russian President Vladimir Putin of having plagiarized 80% of his economics dissertation from a paper published by the University of Pittsburgh a few decades earlier.

descriptive, evaluative, or reflective. Descriptive annotations: When the assignment is just about gathering and summarizing information, focus on the key arguments and methods of each source. Evaluative annotations: When the assignment is about your evaluation of the sources, you should also assess the validity and effectiveness of these arguments and methods. Reflective annotations: When the assignment is part of a larger research process, you need to consider the relevance and usefulness of the sources to your own research.

An annotated bibliography is a list of source references that includes a short descriptive text (an annotation) for each source

Location What you include in the location element depends on the type of source you are citing: Book chapter: Page range of the chapter (e.g. pp. 164–180.) Web page: URL, without “https://” (e.g. www.scribbr.com/mla-style/quick-guide/.) Journal article: DOI, with “https://”—or stable URL, without: (e.g. https://doi.org/10.1080/02626667.2018.1560449. or www.jstor.org/stable/43832354.) Physical object or live event: Name of the location and city (e.g. Moscone Center, San Francisco. or The Museum of Modern Art, New York.)

You generally don’t need to include a publisher for the following source types: Websites Journals Newspapers and magazines Platforms like YouTube, Netflix, or JSTOR

Note that “University Press” is abbreviated to “UP” in a Works Cited entry. For example, the University of Minnesota Press becomes “U of Minnesota P”; Oxford University Press becomes “Oxford UP.”

MLA style citations are commonly used by students and academics in the humanities

presence of world-renowned quantum physicists and mathematicians:Alain Aspect, professor at the Institut d'Optique Graduate School and Ecole Polytechnique, Université Paris-Saclay;David DiVincenzo, Alexander von Humboldt Professor, Director of the Institute for Quantum Information at RWTH Aachen University, Director of the Institute for Theoretical Nanoelectronics at the Juelich Research Center;Artur Ekert, Professor of Quantum Physics at the Mathematical Institute, University of Oxford; Lee Kong Chian Centennial Professor and Director, Centre of Quantum Technologies at the National University of Singapore;Daniel Estève, Research Director, CEA Saclay, head of Quantronics;Serge Haroche, Professor emeritus at the Collège de France, Nobel laureate in Physics;Cédric Villani, Professor at University of Lyon Claude Bernard, Head of the Henri Poincaré Institute CNRS/UPMC, Fields Medal laureate.

Serge Haroche, profesor emérito del Collège de France, premio Nobel de Física.

El Consejo Asesor Cuántico está formada por físicos cuánticos reconocidos universalmente e incluye a: Alain Aspect, profesor del Institut d'Optique Graduate School, Université Paris-Saclay y de Ecole Polytechnique, Institut Polytechnique de Paris David DiVincenzo, profesor del Alexander von Humboldt, director del Instituto de Información Cuántica de la Universidad RWTH Aachen, director del Instituto de Nanoelectrónica Teórica del Centro de Investigación de Juelich; Artur Ekert, profesor de Física Cuántica en el Instituto Matemático de la Universidad de Oxford y Director Fundador del Centro de Tecnologías Cuánticas en Singapur; Daniel Esteve, Director de Investigación, CEA de Saclay, Responsable de Quantronics; Serge Haroche, profesor emérito en el Collège de France, premio Nobel de Física.

It is worth noting that because our papers are only published online we do not use the standard referencing style of volumes and pages. We have volumes: Volume 3 is 2020, Volume 2 is 2019, and everything before that is Volume 1. Each paper published in a given year is allocated an numerical id which is just an integer.

The industry is relying on academics not understanding how cheap things actually are

led to an academic publisher stating that one of the greatest costs of running a journal was registering publications for citation tracking. In fact it costs a maximum of $1 per article (see here)

Incidentally, that image also shows that citations are tracked through the CROSSREF system, in which OJA papers are registered when published and issued with a DOI

SAO/NASA Astrophysics Data System which (for the uninitiated) is a Digital Library portal for researchers in astronomy and physics, operated by the Smithsonian Astrophysical Observatory (SAO) under a NASA grant. The ADS maintains three bibliographic databases containing more than 14.0 million records covering publications in Astronomy and Astrophysics, Physics, and (of course) the arXiv e-prints. In addition to maintaining its bibliographic corpus, the ADS tracks citations and other information, which means that it is an important tool for evaluating publication impact.

To further improve our service to the community, we have decided at the Open Journal of Astrophysics that from now on we will speed up this interaction with ADS by depositing information directly at the same time as we lodge it with Crossref. This means that (a) ADS does not have to rely on authors updating the arXiv field and (b) we can give ADS directly information that is not lodged at Crossref.

citations from the preprint version are then aggregated on the system with those of the published article, but it can take a while before this process is completed, particularly if an author does not update the journal reference on arXiv

To complicate things further, papers submitted to the arXiv as preprints are indexed on ADS as preprints and only appear as journal articles when they are published

ADS also assigns a unique bibliometric code it generates itself (based on the metadata it obtains from Crossref).

When we publish a paper at the Open Journal of Astrophysics we assign a DOI and deposit it and related metadata to a system called CrossRef which is accessed by ADS to populate bibliographic fields in its own database

We currently provide a form-based interface to the resolver as a prototype system simply for the purpose of allowing publishers to test its capabilities and offer suggestions or criticism.

The resolver processes the input strings by performing the following steps: Reference parsing, i.e. identifying the different tokens listed in reference entry. Reference identification, i.e. using the parsed tokens to generate the unique bibliographic code identifier for the reference. Reference verification, i.e. querying the ADS database to verify the existence of the reference.

Examples of references that are correctly parsed and identified include

https://adsabs.harvard.edu/doi/DOI

https://adsabs.harvard.edu/abs/bibcode

The URL abs is available for users to directly access full records in the ADS Abstract Service by bibliographic code (see Building Bibcodes above). abs may be used to link directly to our abstracts from outside of the Abstract Service.

The Reference Resolver allows users and information providers to query the ADS databases to verify the existence and availability of a particular bibliographic reference. The resolver attempts to be as flexible as possible in parsing reference strings and identifying the respective records, so that different citation formats are supported.

To automate the generation of bibcodes from references we provide a Bibliographic Reference Resolver

To verify that a bibcode is correct, you can use the Bibcode Verification Utility

Abstracts that we receive directly from the publishers and the original authors (called "author" abstracts) are instead a faithful and accurate reproduction of text that was published in the paper's abstract (except for math and non-ASCII symbols, of course).

Some of the abstracts in the ADS database (most abstracts in the time span 1975-1995) were given to us by the STI program at NASA, which in most cases rewrote the abstracts to avoid infringing the publisher's copyrights, often shortening the author's original abstract. In general, there is no way to be certain whether an abstract which originated from STI has been rewritten or not.

The ADS is primarily an abstract service, however when we know that a certain article has been published online, we do provide a link to the fulltext, both in the available items column (as an "E" or "F") as well as at the top of the page displaying the abstract. If we do not provide that link, we do not have any further information.

Starting in 2005, we have begun integrating citations obtained from parsing the reference sections of e-prints from the ArXiv.

we strongly encourage the submission of lists of references appearing in a given publication

In addition, references may be incomplete due to our inability to match them with 100% accuracy (e.g. in press, private communications, author errors, some conference series, etc.). Anyone using the citations for analysis of publishing records should keep this in mind.

In October 2007 we gained access to CrossRef's metadata, which includes references from many articles in the physical sciences

In 1999 we started extracting reference lists from the full-text of papers available in the ADS article service or provided to us by the journal publishers

How up-to-date is the Abstract Service? There should not be any significant delay in getting a paper from one of the major journals into our system, which is updated weekly. Records which we receive directly from journal publishers typically go into the system on or before the publication date.

Starting in 2007 we have been able to further complete our coverage of historical records thanks to our access to CrossRef, which collects and makes available metadata records for most of the content produced by Scientific journals.

The ADS FAQ and the ADS BibTeX guide list several options to get the journal macros to work. See also Undefined control sequence BibTex.

In order to use this entry properly the macro \mnras must be defined in your document and it must give the correct replacement text.

The ADS database uses custom macros for certain field values. For common journals, a .bib entry downloaded from ADS will not contain journal = {Monthly Notices of the Royal Astronomical Society}, or journal = {MNRAS}, instead it will deliver a .bib file with journal = {\mnras},

With ADS the family names are incorrectly braced.

differences between @book and @collection as well as @inbook and @incollection

Rule of thumb: If a given entry is lacking the field names journal and volume, it almost certainly shouldn't be an @article.

Zotero (Firefox extension)

80% of the Google Scholar BibTeX have a really bad quality. For me, is the last resource. – epsilone Jan 24 '17 at 8:52

In Google Scholar you need to go to "Scholar Preferences" and select the option "Show links to import citations into Bibtex". – Alejandro Dec 10 '10 at 16:19

Apart from handling outdated arXiv citations, Rebiber also normalizes citations in a unified way (DBLP-style

We introduce Rebiber, a simple tool in Python to fix them automatically

Checklist

I recommend to always add periods after abbreviated parts of journal names, even if the style you’re currently using doesn’t require periods there (i.e., write journal = {Mol. Biol. Evol.}, not journal = {Mol Biol Evol}). At some point you’ll use the Bibtex entry with a different style file that needs periods, and things will go wrong. Again, Bibtex is better at removing periods than it is at adding them.

In Bibtex’s author field, author names are separated by the key word and. It is a common mistake to use a comma instead

I call the first and second law of Bibtex: Nobody really understands Bibtex. All bibliography managers that automatically generate Bibtex entries mess things up. A corollary of the second law is that all Bibtex entries need to be hand-curated to work correctly.1

the most complete description of bibtex’s inner workings is aptly called Tame the BeaST. (This document is well worth the read for anybody using bibtex with some regularity.)

Resist the temptation to double-brace the entire title as a manner of course: {{Title Title with Title}}. This guarantees your title will always be capitalized. But many bib styles downcase all titles, in which case your title will stick out like a sore thumb. Instead, just put your title in single-braces or quotes and let the bib style do the right thing.

Also, make sure, in your BibTeX file, that you properly bracket {} words in titles that must be capitalized, like GPU or PDE, or proper names

the capitalization on titles in your bibtex file should match what's on the paper. The bib style should enforce capitalization, not your bibliography—your bib should faithfully represent what's printed on the paper.

HT de Beer 12. November 2014 at 10:04 If I look in the “Scholar Settings”, I see a section headed with “Bibliography manager”. There are two options. By default, the option “Don’t show any citation import links” is selected. Instead, select the option “Show links to import citation into [ ]” and, in the selection box following, select “BibTeX”. Save your changes and reload.

Jimme 10. May 2015 at 23:01 wget http://search.bibtexsearch.com/search?q=test

My suggestion would be to use the crossref API instead (http://search.crossref.org/help/api).

I am hearing too much about the erroneous/irrelevant information in Google Scholar BibTex codes

Karl Ward 10. June 2014 at 12:04 Karl at CrossRef here. This is a problem with how we are generating bibtex. I’ve been using the Citation Style Language and their bibtex style definition which does not always produce accurate or valid bibtex. I’m now in the process of rewriting our bibtex output to use a different library to produce the bibtex itself. I’m hoping that this will address encoding issues as well as type accuracy.

Joe 6. June 2014 at 18:22 Hi Ian. If you experience any problems with the BibTex generated by CrossRef could you drop us a line at labs@crossref.org and we’ll try to fix it.

You can get citations in BibTex format (other styles) from CrossRef at http://search.crossref.org .

doi2bib. The service retrieves BibTeX entries directly from publishers, through public APIs provided by doi.org and crossref.org.

The main drawbacks include the missing digital object identifier (DOI) or URL linking back to the journal website

Google Scholar is doing a reasonable, but not always brilliant job in generating BibTeX entries (see my recent post on the topic and the discussion).

There are interfaces for people (to look up small numbers of DOIs): Metadata Search, and Simple Text Query.

Here is a comparison of the metadata retrieval options

upload edited CSV and convert back to JSON

convertidor de JSON a CSV/XLS

Might Zotero soon have a right-click mechanism to fix all-caps author names?

edit the OCR before

I use AnyStyle frequently but it is only as good as the quality of the original text (OCRed from a pdf)

citeproc.js is the part of Zotero that takes the data in Zotero, and the citation style you pick, and then formats the citations and bibliography the way you need them to.

ShortDOIs are great for sharing a quick link over email or for display on presentation slides, but they shouldn’t be used in publications (eg, this may interfere with citation cross-linking, which relies on matching DOIs)

I would not be surprised if the service were shut down at some point.

You should not use shortDOI in references

“Verify DOIs” tries to connect to publishers’ websites (rather than to doi.org only)

The reason for overly long DOIs are the local provisions to prevent collision of automatically generated DOIs

activate citeproc-js’s Extra parsing function and override the value stored in the DOI field

Unfortunately, without Long DOI being saved, there isn’t a way to look it up—the shortdoi.org API doesn’t provide a way to reverse lookup Long DOIs from shortDOIs.

Drag the downloaded .xpi file to the Add-Ons popup window

bwiernik Brenton M. Wiernik

bwiernik June 17, 2018 Although you will still get the best metadata by using the Zotero browser button at the publisher website, Zotero's PDF metadata retrieval has been much improved since January and should now get abstracts and DOIs for most articles.

However, the Retrieve Metadata function relies primarily on Google Scholar's full-text database, which doesn't include DOI information, so this function will rarely yield the best metadata

5.4.1 Content Negotiation

DataCite

Crossref

Airiti

Only some DOI registration agencies support content negotiation, which is what Zotero uses to retrieve metadata.

Adding by DOI will often give better results than, say, importing from Google Scholar or using the “Retrieve Metadata for PDF” function

Adding by DOI using the magic wand tool is very fast if you already have the DOI (e.g., if you are copying from a reference list), and it will give very good metadata (though it won’t have abstracts), but it won’t automatically download the PDF.

The best way to add items to the library is using the Zotero browser button from the item page on the publisher website. This will get the best metadata and often the PDF if available

The metadata on both of those providers can have been updated more than once by the publishers. I have CRON scripts that recognize records with incomplete metadata and check the databases and publisher sites several times over a period of 36 months

Only when my system detects complete metadata AND after 24 months and 3 repeat tests with the metadata unchanged is the metadata judged to likely be correct and complete.

dstillman April 17, 2020 Metadata updating is planned, but for now the easiest way to do this is just to use Add Item by Identifier and then select the two items and merge them.

this feature hasn't launched yet. But you'll be able to update metadata for multiple items at once, yes

I respectfully disagree about the advantages. "Add Item by Identifier + Merge Items" requires a copy/paste plus about 8 clicks per item, including a lot of hand-eye movement

the possibility of overwriting current metadata, and the fixes suggested are 1) showing the conflict resolution window and 2) implementing an undo mechanism

Zotero uses currently populated information to do a search

you delete the duplicated pdf file in Zotero but this doesn't remove the file from the Zotero storage folder and there seems to be no simple way to remove unused attachments from the zotero storage folder

One of the biggest issues I have with the workaround of adding a new entry then merging, is that it often results in doubling up of the PDF files

Elsevier, Sage, and Taylor and Francis publishers each will update their ahead-or-print metadata (and thus the date last updated at CrossRef and PubMed) without making meaningful changes