Distant Reader - keyword-sir-cord

Introduction

This is a Distant Reader "study carrel", a set of structured data intended to help the student, researcher, or scholar use & understand a corpus.

This study carrel was created on 2021-05-25 by Eric Morgan <emorgan@nd.edu>. The carrel was created using the Distant Reader cord process, and the input was the result of a query applied to a local mirror of CORD, a data set of scholarly articles on the topic of COVID-19. The actual query was: keywords:sir. The results of this query were saved in a cache and transformed into a set of plain text files. All of the analysis -- "reading" -- has been done against these plain text files. For example, a short narrative report has been created. This Web page is a more verbose version of that report.

All study carrels are self-contained -- no Internet connection is necessary to use them. Download this carrel for offline reading. The carrel is made up of many subdirectories and data files. The manifest describes each one in greater detail.

Size

There are 72 item(s) in this carrel, and this carrel is 311,347 words long. Each item in your study carrel is, on average, 5,660 words long. If you dig deeper, then you might want to save yourself some time by reading a shorter item. On the other hand, if your desire is for more detail, then you might consider reading a longer item. The following charts illustrate the overall size of the carrel.

Readability

On a scale from 0 to 100, where 0 is very difficult and 100 is very easy, the documents have an average readability score of 58. Consequently, if you want to read something more simplistic, then consider a document with a higher score. If you want something more specialized, then consider something with a lower score. The following charts illustrate the overall readability of the carrel.

Word Frequencies

By merely counting & tabulating the frequency of individual words or phrases, you can begin to get an understanding of the carrel's "aboutness". Excluding "stop words", some of the more frequent words include:

model, i, time, sir, data, covid, number, infected, epidemic, population, models, rate, disease, cases, infectious, infection, individuals, one, susceptible, also, case, will, may, parameters, using, dynamics, function, used, different, given, social, based, pandemic, transmission, system, two, control, first, distribution, spread, results, outbreak, state, study, recovered, countries, period, size, values, initial

Using the three most frequent words, the three files containing all of those words the most are Incentives, lockdown, and testing: from Thucydides's analysis to the COVID-19 pandemic, FFP3 reusable respirators for COVID-19; adequate and suitable in the healthcare setting, and covid19.analytics: An R Package to Obtain, Analyze and Visualize Data from the Corona Virus Disease Pandemic.

The most frequent two-word phrases (bigrams) include:

sir model, social distancing, transmission rate, infectious diseases, infected individuals, reproduction number, infectious disease, granted medrxiv, author funder, infection rate, differential equations, copyright holder, total number, time series, version posted, infected people, public health, basic reproduction, sir models, epidemic threshold, susceptible population, infected population, base location, epidemic model, model parameters, final size, susceptible individuals, made available, peer review, power law, confirmed cases, international license, initial conditions, total population, recovery rate, epidemic models, sis model, monte carlo, novel coronavirus, coronavirus disease, population size, optimal control, seir model, cord uid, doc id, posted may, active cases, incubation period, herd immunity, plastic surgery

And the three file that use all of the three most frequent phrases are A Review of Multi‐Compartment Infectious Disease Models Social distancing versus early detection and contacts tracing in epidemic management, and A Fundamental Inconsistency in the SIR Model Structure and Proposed Remedies.

While often deemed superficial or sophomoric, rudimentary frequencies and their associated "word clouds" can be quite insightful:

Keywords

Sets of keywords -- statistically significant words -- can be enumerated by comparing the relative frequency of words with the number of times the words appear in an entire corpus. Some of the most statistically significant keywords in the carrel include:

sir, model, covid-19, sis, time, network, infectious, india, epidemic, ddft, covid, case, volterra, twitter, system, susceptible, surgery, surgeon, study, stochastic, sird, seir, section, sars, quarantine, ppe, plastic, pged, patient, padé, objective, node, nhs, memory, markovian, lyapunov, location, kerala, italy, isolation, infection, hopkins, hmf, health, hcd, hand, function, forecast, distribution, distance

And now word clouds really begin to shine:

Topic Modeling

Topic modeling is another popular approach to connoting the aboutness of a corpus. If the study carrel could be summed up in a single word, then that word might be model, and Numerical identification of epidemic thresholds for susceptible-infected-recovered model on finite-size networks is most about that word.

If the study carrel could be summed up in three words ("topics") then those words and their significantly associated titles include:

If the study carrel could be summed up in five topics, and each topic were each denoted with three words, then those topics and their most significantly associated files would be:

model, time, sir - On COVID-19 Modelling
model, covid, 2020 - FFP3 reusable respirators for COVID-19; adequate and suitable in the healthcare setting
model, sir, time - Theory of early warning signals of disease emergenceand leading indicators of elimination
model, sir, epidemic - Modelos SIR modificados para la evoluci''on del COVID19
data, cases, covid19 - covid19.analytics: An R Package to Obtain, Analyze and Visualize Data from the Corona Virus Disease Pandemic

Moreover, the totality of the study carrel's aboutness, can be visualized with the following pie chart:

Noun & Verbs

Through an analysis of your study carrel's parts-of-speech, you are able to answer question beyonds aboutness. For example, a list of the most frequent nouns helps you answer what questions; "What is discussed in this collection?":

model, time, data, number, epidemic, population, rate, models, cases, disease, individuals, infection, case, parameters, β, function, dynamics, system, transmission, pandemic, distribution, outbreak, control, results, state, period, countries, values, size, people, value, parameter, probability, spread, order, equations, measures, lockdown, analysis, i, peak, network, study, α, γ, preprint, virus, days, networks, section

An enumeration of the verbs helps you learn what actions take place in a text or what the things in the text do. Very frequently, the most common lemmatized verbs are "be", "have", and "do"; the more interesting verbs usually occur further down the list of frequencies:

use, show, give, considering, infected, follow, based, obtained, see, estimate, assume, recovered, reduce, takes, make, reported, provided, described, spreading, presented, include, allowed, predicted, defines, find, represent, increases, leads, removed, become, compare, propose, determine, starting, note, modeling, observed, display, corresponds, known, confirmed, expected, vary, denotes, occurs, fit, indicate, solved, applying, depends

Proper Nouns

An extraction of proper nouns helps you determine the names of people and places in your study carrel.

SIR, COVID-19, S, Fig, _, Eq, N, T, China, SIS, •, May, −, β, Italy, D, el, SARS, γ, J, SEIR, ∞, March, I(t, F, ␣, C, Infectious, India, Figure, Table, R, June, April, los, COVID, max, σ, M, Coronavirus, A, I, CC, ≈, Monte, Carlo, Appendix, λ, nan, Y

An analysis of personal pronouns enables you to answer at least two questions: 1) "What, if any, is the overall gender of my study carrel?", and 2) "To what degree are the texts in my study carrel self-centered versus inclusive?"

we, it, i, our, its, their, they, one, us, them, itself, he, themselves, s, you, his, u, her, your, she, him, 's, my, β, ourselves, z, https://laurayuliu.com/covid19-panel-forecast/., f, ߬, ı, ĝ, Þ, tt, thee, t, parameter˛is, ours, oneself, ofd, n,0, mine, me, kγ, infect_rate, i.t/, herewith, 1=

Below are words cloud of your study carrel's proper & personal pronouns.

Adjectives & Verbs

Learning about a corpus's adjectives and adverbs helps you answer how questions: "How are things described and how are things done?" An analysis of adjectives and adverbs also points to a corpus's overall sentiment. "In general, is my study carrel positive or negative?"

infected, infectious, susceptible, different, social, initial, first, total, large, covid-19, available, new, constant, second, small, effective, early, mathematical, stochastic, basic, numerical, non, many, possible, high, optimal, epidemiological, similar, important, particular, average, standard, simple, real, critical, mean, final, differential, general, active, positive, multiple, local, daily, statistical, random, larger, several, exponential, current

also, however, well, therefore, respectively, even, now, first, hence, still, finally, much, rather, moreover, already, indeed, directly, randomly, often, instead, relatively, consequently, always, numerically, far, easily, almost, significantly, typically, together, similarly, furthermore, highly, later, namely, just, widely, specifically, generally, less, quite, currently, initially, particularly, eventually, especially, clearly, rapidly, long, usually

Next steps

There is much more to a study carrel than the things outlined above. Use this page's menubar to navigate and explore in more detail. There you will find additional features & functions including: ngrams, parts-of-speech, grammars, named entities, topic modeling, a simple search interface, etc.

Again, study carrels are self-contained. Download this carrel for offline viewing and use.

Thank you for using the Distant Reader.