The wasted spark system is a type of ignition system commonly used in internal combustion engines, particularly those with four-stroke cycles. It is designed to improve efficiency and performance by optimizing the timing and firing of spark plugs. In a wasted spark ignition system, each pair of cylinders (often from a V-type or inline engine) shares a single ignition coil. When the ignition coil is energized, it produces a spark that fires both spark plugs in the pair at the same time.
"Momo" is a television series adapted from the novel "Momo," written by German author Michael Ende. The story revolves around a young girl named Momo, who has the ability to listen to others and understand their problems. The narrative explores themes such as time, friendship, and the importance of human connection. In the story, Momo confronts mysterious figures known as the "Grey Men," who steal people's time and encourage a fast-paced, superficial way of living.
ARPA by Ciro Santilli 40 Updated 2026-02-08
Old name for DARPA before 1972, and again for a short time between 1993 and 1996. That's why ARPANET is called "ARPANET" and not "DARPANET".
Gel electrophoresis by Ciro Santilli 40 Updated 2025-07-16
Technique widely used to measure the size of DNA strands, most often PCR output of a region of interest.
A simple sample application is gel electrophoresis alelle determination.
The list of Slovenian physicists includes notable individuals from Slovenia who have made significant contributions to the field of physics. Some prominent Slovenian physicists include: 1. **Jožef Stefan** - A physicist and mathematician known for the Stefan-Boltzmann law. 2. **Lojze Smole** - Known for his work in theoretical physics and contributions to other scientific fields. 3. **Boris B. Sila** - Focused on experimental physics and materials science.
Carsten Peterson could refer to different individuals, as it is a relatively common name. Without additional context, it's difficult to determine who exactly you are asking about. There may be notable professionals in various fields (such as academia, business, or sports) with that name.
Sara Mazur is a prominent figure in the field of technology, particularly known for her role in research and development. She has been associated with Ericsson, where she served as the Senior Vice President and Head of Ericsson Research. In this capacity, she has contributed to advancements in telecommunications and has been influential in areas such as 5G technology and innovations in mobile networks.
Gregory Wannier is a notable figure in the field of condensed matter physics, primarily known for his foundational contributions to the theoretical understanding of electronic properties in solids. He is particularly recognized for the development of the "Wannier functions," which are a set of orthogonal functions used to describe the electronic states of a periodic potential in solid-state physics.
Yurii G. Naidyuk is a prominent physicist known for his research in the field of condensed matter physics, particularly in the areas related to superconductivity, mesoscopic systems, and quantum transport phenomena. His work often involves the study of low-dimensional materials and nanostructures, contributing to our understanding of quantum effects in solid-state systems. If you are looking for specific contributions or publications by Yurii G. Naidyuk, please provide more context or details!
Fabienne Casoli is not widely recognized in popular media or literature as of my last knowledge update in October 2023. It's possible that she could be a figure in a specific field, such as academia, art, or a local context.
Ingrid van Houten-Groeneveld is a Dutch astronomer known for her work in the field of asteroids and minor planets. She has made significant contributions to the discovery and study of numerous asteroids and is recognized for her role in promoting the understanding of these celestial objects. Her research often involves collaboration with other astronomers, and she has been involved in efforts to improve asteroid detection and tracking.
Yevgenia Bugoslavskaya appears to be a relatively obscure or less widely known individual, and there is no significant publicly available information on her as of my last knowledge update in October 2023. It's possible that she may be a private individual, a character in a story, or a figure in a niche area not covered in mainstream sources.
Dumitru Enescu is not a widely recognized name in popular culture or history based on my training data. It could refer to a specific individual, perhaps in a regional context or a lesser-known figure. It could also be a name of a business or organization.
Giuseppe Mercalli (1850–1914) was an Italian volcanologist and priest who is best known for developing the Mercalli intensity scale, which measures the effects of an earthquake based on observations and experiences of people in the affected areas. Unlike the Richter scale, which quantifies the energy released by an earthquake, the Mercalli scale is qualitative and assesses the impact of the earthquake, including damage to buildings, changes in the landscape, and human perceptions.
Raymundo Punongbayan (1939–2019) was a prominent Filipino geologist and public servant known for his contributions to the field of geology, particularly in the study of volcanic eruptions and disaster risk reduction in the Philippines. He served as the director of the Philippine Institute of Volcanology and Seismology (PHIVOLCS), where he played a pivotal role in monitoring volcanic activities and providing early warning systems to mitigate the impact of natural disasters.

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!
We have two killer features:
  1. 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-calculus
    Articles 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/derivative
  2. 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.
    Figure 2.
    You can publish local OurBigBook lightweight markup files to either https://OurBigBook.com or as a static website
    .
    Figure 3.
    Visual Studio Code extension installation
    .
    Figure 4.
    Visual Studio Code extension tree navigation
    .
    Figure 5.
    Web editor
    . 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.
    Video 4.
    OurBigBook Visual Studio Code extension editing and navigation demo
    . Source.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
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