Complex Systems Studies
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What's up in Complexity Science?!
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@ComplexSys

#complexity #complex_systems #networks #network_science

📨 Contact us: @carimi
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A life in statistical mechanics
An oral history interview on the lifelong involvement of Joel Lebowitz in the development of statistical mechanics.

Part 1: From Chedar in Taceva to Yeshiva University in New York
https://arxiv.org/abs/1702.04810
سلام
مثل سال‌های گذشته از هفته دیگه ما کلاس فشرده «روش‌های ریاضی در علم شبکه» رو در آلتو خواهیم داشت. این درس برای دانشجویان کارشناسی ارشد و دکتری رشته‌های محاسباتی طراحی شده. دوره شامل ۶ قسمت و هر قسمت متشکل از یک جلسه درس و دو جلسه حل تمرینه، یکی برای رفع اشکال و دیگری برای حل و فصل مسائل به صورت کامل. این درس امتحان نداره. در عوض یک پروژه برای تحویل دادن داره. اسلایدها و ویدیو ضبط شده هر جلسه کلاس درس (از سال گذشته) به همراه تمرین‌ها برای همگان به رایگان در دسترسه. نیومن، منبع اصلی این درسه و جزئیات بیشتر در نشانی زیر موجوده:
https://mycourses.aalto.fi/course/view.php?id=36677

من معلم حل تمرین این درس هستم. اگر کسی پیش‌نیازهای لازم رو بلده و علاقه‌مند به گذروندن این دوره‌س می‌تونه کلاس رو دنبال کنه و پاسخ تمرین‌ها و پروژه درس رو به ایمیل شخصی من ارسال کنه. من تلاشم رو می‌کنم تا در اولین فرصت اون‌ها رو تصحیح کنم و نتایجشون رو اطلاع بدم. اگر کسی مطابق با استاندارد این درس، دوره رو با موفقیت گذروند می‌تونم بهش دست‌خطی بدم که اگر جایی ارزش داشت، ازش استفاده کنه. بچه‌های رشته سیستم‌های پیچیده احتمالا این درس رو جذاب خواهند یافت :)

Mathematical Methods for Network Science
Department of Computer Science - Aalto University

Topics:
Basic models and the typical approaches in network science
Probability generating functions, Galton-Watson process, percolation threshold
Component size distributions (using PGF's)
Network evolution models and processes on networks
Exponential random graphs, block models
Message passing methods on complex networks

اگر کسی در دانشگاه‌های مختلف دوست داره به من کمک کنه، لطفا بهم پیام بده. @carimi

عباس ریزی abbas.sitpor.org
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Notre Dame lecture about the dawn of the random walk

How can you stop a pandemic from sweeping the world? Can ancient Greek proportions predict the stock market? And why is learning to play chess so much easier for computers than learning to read a sentence?
https://youtu.be/r21X597Fays
Laplacian renormalization group for heterogeneous networks
Pablo Villegas, Tommaso Gili, Guido Caldarelli & Andrea Gabrielli


The renormalization group is the cornerstone of the modern theory of universality and phase transitions and it is a powerful tool to scrutinize symmetries and organizational scales in dynamical systems. However, its application to complex networks has proven particularly challenging, owing to correlations between intertwined scales. To date, existing approaches have been based on hidden geometries hypotheses, which rely on the embedding of complex networks into underlying hidden metric spaces. Here we propose a Laplacian renormalization group diffusion-based picture for complex networks, which is able to identify proper spatiotemporal scales in heterogeneous networks. In analogy with real-space renormalization group procedures, we first introduce the concept of Kadanoff supernodes as block nodes across multiple scales, which helps to overcome detrimental small-world effects that are responsible for cross-scale correlations. We then rigorously define the momentum space procedure to progressively integrate out fast diffusion modes and generate coarse-grained graphs. We validate the method through application to several real-world networks, demonstrating its ability to perform network reduction keeping crucial properties of the systems intact.

https://www.nature.com/articles/s41567-022-01866-8
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Complex Systems Studies
Laplacian renormalization group for heterogeneous networks Pablo Villegas, Tommaso Gili, Guido Caldarelli & Andrea Gabrielli The renormalization group is the cornerstone of the modern theory of universality and phase transitions and it is a powerful tool…
A zoom lens for networks

Renormalization is a technique based on a repeated coarse-graining procedure used to study scale invariance and criticality in statistical physics. Now, an expansion of the renormalization toolbox allows to explore scale invariance in real-world networks.

https://www.nature.com/articles/s41567-022-01842-24
Check out our latest paper about our general purpose network library Reticula:
https://www.sciencedirect.com/science/article/pii/S2352711022002199

It natively supports (directed & undirected) (dyadic & hypergraph) (static & temporal) networks. C++ with Python bindings.

Install with pip on Python 3.8+:
$ python -m pip install -U reticula

Currently only supports Linux (glibc >= 2.17). Future windows + MacOS support is planned.

If this sounds interesting, do check out the documentation at reticula.network.
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Modern computational studies of the glass transition

The physics of the glass transition and amorphous materials continues to attract the attention of a wide research community after decades of effort. Supercooled liquids and glasses have been studied numerically since the advent of molecular dynamics and Monte Carlo simulations, and computer studies have greatly enhanced both experimental discoveries and theoretical developments. In this #Review, we provide a modern perspective on this area. We describe the need to go beyond canonical methods when studying the glass transition — a problem that is notoriously difficult in terms of timescales, length scales and physical observables. We summarize recent algorithmic developments to achieve enhanced sampling and faster equilibration by using replica-exchange methods, cluster and swap Monte Carlo algorithms, and other techniques. We then review some major advances afforded by these tools regarding the statistical mechanical description of the liquid-to-glass transition, and the mechanical, vibrational and thermal properties of the glassy solid.

https://www.nature.com/articles/s42254-022-00548-x
Do you want to come and work in Paris?
We have 2 open post-doc positions in network epidemiology at the epicx lab, Pierre Louis Institute of Epidemiology and Public Health, Modeling and surveillance team.

https://www.epicx-lab.com/open-positions.html
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"The production and spread of scientific ideas"
the science of science & how prestige shapes pretty much everything in academia, for the Data Science Research Centre at Caritas Inst. of Higher Ed. in HK

https://youtu.be/cX2sXEMkKhw
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Reddit is recruiting for Data Science interns for a range of projects ranging from ads to safety to community-building. Interns are being recruited from MS to PhD levels for summer roles, either in-person (SF or NYC) or remote. You can apply here: https://app.ripplematch.com/company/reddit/