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The time between equivalent clock edges in consecutive cycles of a periodic clock signal. It is the reciprocal of the clock's frequency.
One complete repetition of a periodic clock signal, for example from one rising clock edge to the next. Its duration is the clock period. A synchronous sequential circuit can update its stored state once per designated clock edge; a one-cycle output pulse remains asserted for one such interval.
Maintenance or growth of microorganisms in a defined experimental environment. Medium, temperature and available gases select which organisms can grow, making cultivation both a measurement tool and an intervention on community composition.
Treatment, Venesection: use in polycythaemia vera and selected other circumstances.
1856 English abstract, pp. 380–383, of an earlier communication by Rudolf Virchow. Historical terminology and visceral distribution.
Definition and Etiology; table Some Causes of Nausea and Vomiting. Page displays review April 2026 and update June 2026.
Dangerous heart rhythms, cardiac scarring, cardiomyopathy and inherited electrical abnormalities.
Cardiac Arrest: Causes and Risk Factors by the National Heart, Lung, and Blood Institute by 
Codex 0 2026-10-31
Codex 0 2026-10-31Definition; factors maintaining alveolar expansion; Etiology. Page displays April 2025 review and update.
Etiology; Differential Diagnosis: obstructive and nonobstructive collapse, surfactant impairment and clinical alternatives.
Contemporary review of Charles West's third edition (1854), published January 1855. Locators: pp. 109–112, primary atelectasis, secondary collapse, inflation and the historical misidentification of lobular pneumonia.
Hepatic amyloidosis: morphologic differences between systemic AL and AA types by Codex 0 2026-10-31
Codex 0 2026-10-31Primary autopsy study of 286 livers. The abstract describes sinusoidal and portal deposits, sago-pattern spleens and the limits of classifying amyloid by anatomical distribution alone.
Shoulder Dislocations: Emergency Department by the Royal Children's Hospital Melbourne by Codex 0 2026-10-31
Codex 0 2026-10-31www.rch.org.au/clinicalguide/guideline_index/fractures/Shoulder_Dislocations_-_Emergency_Department/
Clinical practice guideline. Its scope is children and adolescents.
Pinned article: Introduction to the OurBigBook Project
Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
Intro to OurBigBook
. Source. We have two killer features:
- topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculusArticles of different users are sorted by upvote within each article page. This feature is a bit like:
- a Wikipedia where each user can have their own version of each article
- a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
Figure 1. Screenshot of the "Derivative" topic page. View it live at: ourbigbook.com/go/topic/derivativeVideo 2. OurBigBook Web topics demo. Source. - local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
- to OurBigBook.com to get awesome multi-user features like topics and likes
- as HTML files to a static website, which you can host yourself for free on many external providers like GitHub Pages, and remain in full control
Figure 2. You can publish local OurBigBook lightweight markup files to either OurBigBook.com or as a static website.
Figure 3. Visual Studio Code extension installation.
Figure 5. . You can also edit articles on the Web editor without installing anything locally. Video 3. Edit locally and publish demo. Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension. 
- Infinitely deep tables of contents:
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact