🚗 Braess' paradox in the age of traffic information
Stefan Bittihn, Andreas Schadschneider
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The Braess paradox describes the counterintuitive situation that the addition of new roads to road networks can lead to higher travel times for all network users. Recently we could show that user optima leading to the paradox exist in networks of microscopic transport models. We derived phase diagrams for two kinds of route choice strategies that were externally tuned and applied by all network users. Here we address the question whether these user optima are still realized if intelligent route choice decisions are made based upon two kinds of traffic information. We find that the paradox still can occur if the drivers 1) make informed decisions based on their own past experiences or 2) use traffic information similar to that provided by modern navigation apps. This indicates that modern traffic information systems are not able to resolve Braess' paradox.
Stefan Bittihn, Andreas Schadschneider
Download PDF
The Braess paradox describes the counterintuitive situation that the addition of new roads to road networks can lead to higher travel times for all network users. Recently we could show that user optima leading to the paradox exist in networks of microscopic transport models. We derived phase diagrams for two kinds of route choice strategies that were externally tuned and applied by all network users. Here we address the question whether these user optima are still realized if intelligent route choice decisions are made based upon two kinds of traffic information. We find that the paradox still can occur if the drivers 1) make informed decisions based on their own past experiences or 2) use traffic information similar to that provided by modern navigation apps. This indicates that modern traffic information systems are not able to resolve Braess' paradox.
A paper for pre-teens & teens on an introduction to mathematical modeling of infectious diseases: "Disease Detectives: Using Mathematics to Forecast the Spread of Infectious Diseases": https://t.co/U0KaLekf60
Are you a complete beginner in computational social science who wants to learn how to code? I'm happy to announce our new "coding bootcamp" video tutorials for the Summer Institutes in Computational Social Science:
https://compsocialscience.github.io/summer-institute/boot_camp
https://compsocialscience.github.io/summer-institute/boot_camp
Twitter
Chris Bail
1/n Are you a *complete beginner* in computational social science who wants to learn how to code? I'm happy to announce our new "coding bootcamp" video tutorials for the Summer Institutes in Computational Social Science: https://t.co/KEuxLCshuG
#Event | 12 days left to register to the free online symposium #Physics of Living Matter 15! 🕒
➡ More info: https://t.co/CXuqQrLn1S
#Biology #Physics #Biophysics #science #PLM15
➡ More info: https://t.co/CXuqQrLn1S
#Biology #Physics #Biophysics #science #PLM15
#Event Complexity Weekend is a community of practice oriented around the application of Complexity Science to help solve pressing problems that defy disciplinary solutions. We put on weekend-long hackathons featuring energetic participation and skilled facilitation that help people from all over the world form diverse teams, discover shared purpose together, and address a variety of issues from a Complexity perspective.
We welcome participants of all backgrounds, locations, familiarity with Complexity, and level of engagement with our community of practice. Your enthusiasm will be at home here and your unique perspective is needed!
➡ More Info and Registration:
https://www.complexityweekend.com/
We welcome participants of all backgrounds, locations, familiarity with Complexity, and level of engagement with our community of practice. Your enthusiasm will be at home here and your unique perspective is needed!
➡ More Info and Registration:
https://www.complexityweekend.com/
Complexityadventures
Complexity Adventures
2019-2024
Forwarded from Sitpor.org سیتپـــــور
آیا باید دکتری بخونم؟!
این روزها، همه کسایی که با من لیسانس رو شروع کردند یا دانشگاه رو کاملا ترک کردن یا اینکه جایی در گذار از کارشناسی ارشد به دکتری هستن. تعدادی وارد دوره دکتری شدن و تعدادی هم در فکر ورود به این مقطع شب و روزشون رو سر می‌کنن. نزدیک به یک‌ساله که من دوره دکتریم رو در آلتو شروع کردم. احتمالا هنوز تجربه کافی برای دادن یک جواب خیلی پخته به این سوال رو ندارم، اما به نظرم تجربه‌هایی که این مدت کسب کردم یا چیزهایی که از بقیه شنیدم یا دیدم بتونه ایده‌های شفاف‌تری بده در مورد دکتری خوندن!
🔗 sitpor.org/1399/06/do-a-phd/
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@sitpor #phd #phdlife #phdhack
این روزها، همه کسایی که با من لیسانس رو شروع کردند یا دانشگاه رو کاملا ترک کردن یا اینکه جایی در گذار از کارشناسی ارشد به دکتری هستن. تعدادی وارد دوره دکتری شدن و تعدادی هم در فکر ورود به این مقطع شب و روزشون رو سر می‌کنن. نزدیک به یک‌ساله که من دوره دکتریم رو در آلتو شروع کردم. احتمالا هنوز تجربه کافی برای دادن یک جواب خیلی پخته به این سوال رو ندارم، اما به نظرم تجربه‌هایی که این مدت کسب کردم یا چیزهایی که از بقیه شنیدم یا دیدم بتونه ایده‌های شفاف‌تری بده در مورد دکتری خوندن!
🔗 sitpor.org/1399/06/do-a-phd/
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@sitpor #phd #phdlife #phdhack
I'm hiring postdocs in data science & encourage underrepresented scholars to apply: https://t.co/iQNFxW3UWn
Please don't self-select out because the positions are at @Stanford. Long list of papers & "elite" schools aren't required. I read every application looking for potential.
Please don't self-select out because the positions are at @Stanford. Long list of papers & "elite" schools aren't required. I read every application looking for potential.
We are excited to announce the opening of registration for the upcoming Complexity Weekend facilitated hackathon (October 16th-18th, 2020). Learn more details about the event and register to participate at https://www.complexityweekend.com/
Complexity Weekend is a community of practice oriented around the application of Complexity Science to help solve pressing problems that defy disciplinary solutions. We put on weekend-long hackathons featuring energetic participation and skilled facilitation that help people from all over the world form diverse teams, discover shared purpose together, and address a variety of issues from a Complexity perspective.
The link to learn more about this event is https://www.complexityweekend.com/. Please reach out at [email protected]
Complexity Weekend is a community of practice oriented around the application of Complexity Science to help solve pressing problems that defy disciplinary solutions. We put on weekend-long hackathons featuring energetic participation and skilled facilitation that help people from all over the world form diverse teams, discover shared purpose together, and address a variety of issues from a Complexity perspective.
The link to learn more about this event is https://www.complexityweekend.com/. Please reach out at [email protected]
This is one of the most succinct and best written short pieces on #herd_immunity, what it is and where we are heading with #COVID19.
If not comfortable with math, just get through the first sentences and it’s worth continuing the read: https://t.co/1F3MuQWkfc
Also, if not familiar with the authors, they include some of the very best of epidemiologists and mathematical thinkers in #infectious_diseases today.
If not comfortable with math, just get through the first sentences and it’s worth continuing the read: https://t.co/1F3MuQWkfc
Also, if not familiar with the authors, they include some of the very best of epidemiologists and mathematical thinkers in #infectious_diseases today.
Nature Reviews Immunology
COVID-19 herd immunity: where are we?
During the current COVID-19 pandemic, the concept of herd immunity has become a topic of much debate. This Comment examines the factors that determine it, discusses how far we have come and considers what it will take to reach herd immunity safely.
🐍 The Algorithms - Python 🐍
A beautiful and well-maintained repository of some classic and well-known algorithms from many different domains.
This resource can help you understand how to implement algorithms while practicing programming using Python.
https://t.co/05kw2bw1az
A beautiful and well-maintained repository of some classic and well-known algorithms from many different domains.
This resource can help you understand how to implement algorithms while practicing programming using Python.
https://t.co/05kw2bw1az
GitHub
GitHub - TheAlgorithms/Python: All Algorithms implemented in Python
All Algorithms implemented in Python. Contribute to TheAlgorithms/Python development by creating an account on GitHub.
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Introduction to Computational Thinking
The new course MIT 18.S191, the debut edition, Fall 2020!
This is an introductory course on Computational Thinking. We use the Julia programming language to approach real-world problems in varied areas applying data analysis and computational and mathematical modeling. In this class you will learn computer science, software, algorithms, applications, and mathematics as an integrated whole.
Topics include:
Image analysis
Particle dynamics and ray tracing
Epidemic propagation
Climate modeling
Professors
Alan Edelman, David P. Sanders, Grant Sanderson, & James Schloss
https://computationalthinking.mit.edu/Fall20/
The new course MIT 18.S191, the debut edition, Fall 2020!
This is an introductory course on Computational Thinking. We use the Julia programming language to approach real-world problems in varied areas applying data analysis and computational and mathematical modeling. In this class you will learn computer science, software, algorithms, applications, and mathematics as an integrated whole.
Topics include:
Image analysis
Particle dynamics and ray tracing
Epidemic propagation
Climate modeling
Professors
Alan Edelman, David P. Sanders, Grant Sanderson, & James Schloss
https://computationalthinking.mit.edu/Fall20/
' Lecture Notes on "Random Matrices" ' (by Roland Speicher): https://t.co/7OnCCrHRsp
"This in an introduction to random matrix theory, giving an impression of some of the most important aspects of this modern subject."
"This in an introduction to random matrix theory, giving an impression of some of the most important aspects of this modern subject."
Curious about how your brain builds a coherent & dynamically updated map of the world using only the senses of your constantly moving body?
#hiring 2 outstanding candidates for #PhD or #postdoc positions.
Apply #jobs 👉
https://t.co/XS9wkfpRPM
#hiring 2 outstanding candidates for #PhD or #postdoc positions.
Apply #jobs 👉
https://t.co/XS9wkfpRPM
💰 Our department is looking for #PhD students in the general areas of Active Matter, Non-equilibrium Statistical Physics, and Active Hydrodynamics. We offer theoretical and computational projects on a range of topics. Interested? Apply now! https://t.co/Me347OgPUj
📺 MIT has a course about the Covid-19 pandemic, & the live stream of the guest lectures is available for FREE for EVERYBODY! The 9/20 class will feature the amazing Anthony Fauci! https://t.co/1P0dGqBBe6
Forwarded from Sitpor.org سیتپـــــور
این عکس، درست فردای روزیه که هالدین خبردار شد که برنده جایزه نوبل در فیزیک شده! کلاس، کلاس الکترومغناطیس سه‌شنبه صبحه. هم حس هالدین و هم حس دانشجوهای اون کلاس واقعا خریدن داره!
در مورد نوبل فیزیک ۲۰۱۶: «گذار فازهای تپولوژیک و فازهای تپولوژیک ماده» اینجا بخونید:
🔗 sitpor.org/2016/10/nobel2016/
در مورد نوبل فیزیک ۲۰۱۶: «گذار فازهای تپولوژیک و فازهای تپولوژیک ماده» اینجا بخونید:
🔗 sitpor.org/2016/10/nobel2016/
Forwarded from Complex Networks (SBU)
#PCNet20, the netsci2020 satellite on Political Communication Networks is approaching. Friday September 18, 13:50 CEST is the date. Check our amazing program and don't miss it!
https://t.co/M52gzcTJm5
در‌مورد پروژه توییتر مرکز شبکه‌های پیچیده و علم‌داده اجتماعی دانشگاه بهشتی در اینجا بیشتر بخوانید:
✅ ccnsd.ir/Twitter
https://t.co/M52gzcTJm5
در‌مورد پروژه توییتر مرکز شبکه‌های پیچیده و علم‌داده اجتماعی دانشگاه بهشتی در اینجا بیشتر بخوانید:
✅ ccnsd.ir/Twitter