Forwarded from MathSBU (Bijan Ahmadi)
به اطلاع دانشجویان گرامی میرسانیم، گروه ریاضی کاربردی و صنعتی دانشگاه شهید بهشتی از مهر ۱۳۹۷ در گرایش علوم داده دانشجوی کارشناسی ارشد میپذیرد.
Forwarded from MathSBU (Bijan Ahmadi)
سرفصل درسهای گرایش علوم داده، مصوب وزارت علوم
Forwarded from A R
فراخوان دعوت به همکاری
ما یک شرکت دانش بنیان هستیم که در حوزه مدلسازی و شبیه سازی مسایل اجتماعی-اقتصادی فعالیت می¬کنیم و از افراد واجد شرایط زیر دعوت به همکاری می کنیم. لازمه کار ما داشتن علاقه به مطالعه کمّی و محاسباتی علوم انسانی، حداقلی از دانش ریاضی (در حد رشته های مهندسی)، و استعداد و خلاقیت است. محیط کار ما هم دوستانه و همراه با یادگیری است و در حال حاضر برای انجام بعضی پروژه های در دست و همچنین گسترش تیم مان نیاز به همکاران جدید داریم.بعضی از رشته هایی که ممکن است به کار ما مرتبط باشند و فارغ التحصیلان یا دانشجویانش می توانند جهت همکاری با ما اقدام کنند عبارتند از:
• ریاضی
• آمار
• علوم کامپیوتر
• مهندسی صنایع
• مهندسی کامپیوتر
• فیزیک
• برق (گرایش کنترل)
افراد علاقمند می توانند رزومه خود را به آدرس زیر بفرستند:
info@raayaar.ir
ما یک شرکت دانش بنیان هستیم که در حوزه مدلسازی و شبیه سازی مسایل اجتماعی-اقتصادی فعالیت می¬کنیم و از افراد واجد شرایط زیر دعوت به همکاری می کنیم. لازمه کار ما داشتن علاقه به مطالعه کمّی و محاسباتی علوم انسانی، حداقلی از دانش ریاضی (در حد رشته های مهندسی)، و استعداد و خلاقیت است. محیط کار ما هم دوستانه و همراه با یادگیری است و در حال حاضر برای انجام بعضی پروژه های در دست و همچنین گسترش تیم مان نیاز به همکاران جدید داریم.بعضی از رشته هایی که ممکن است به کار ما مرتبط باشند و فارغ التحصیلان یا دانشجویانش می توانند جهت همکاری با ما اقدام کنند عبارتند از:
• ریاضی
• آمار
• علوم کامپیوتر
• مهندسی صنایع
• مهندسی کامپیوتر
• فیزیک
• برق (گرایش کنترل)
افراد علاقمند می توانند رزومه خود را به آدرس زیر بفرستند:
info@raayaar.ir
🔖 Multichannel social signatures and persistent features of ego networks
Sara Heydari, Sam G. Roberts, Robin I. M. Dunbar, and Jari Saramäki
🔗 https://rdcu.be/QmwK
📌 ABSTRACT
The structure of egocentric networks reflects the way people balance their need for strong, emotionally intense relationships and a diversity of weaker ties. Egocentric network structure can be quantified with ’social signatures’, which describe how people distribute their communication effort across the members (alters) of their personal networks. Social signatures based on call data have indicated that people mostly communicate with a few close alters; they also have persistent, distinct signatures. To examine if these results hold for other channels of communication, here we compare social signatures built from call and text message data, and develop a way of constructing mixed social signatures using both channels. We observe that all types of signatures display persistent individual differences that remain stable despite the turnover in individual alters. We also show that call, text, and mixed signatures resemble one another both at the population level and at the level of individuals. The consistency of social signatures across individuals for different channels of communication is surprising because the choice of channel appears to be alter-specific with no clear overall pattern, and ego networks constructed from calls and texts overlap only partially in terms of alters. These results demonstrate individuals vary in how they allocate their communication effort across their personal networks and this variation is persistent over time and across different channels of communication.
#Social_signatures, #Social_networks, #Egocentric_networks, #Mobile_phones
Sara Heydari, Sam G. Roberts, Robin I. M. Dunbar, and Jari Saramäki
🔗 https://rdcu.be/QmwK
📌 ABSTRACT
The structure of egocentric networks reflects the way people balance their need for strong, emotionally intense relationships and a diversity of weaker ties. Egocentric network structure can be quantified with ’social signatures’, which describe how people distribute their communication effort across the members (alters) of their personal networks. Social signatures based on call data have indicated that people mostly communicate with a few close alters; they also have persistent, distinct signatures. To examine if these results hold for other channels of communication, here we compare social signatures built from call and text message data, and develop a way of constructing mixed social signatures using both channels. We observe that all types of signatures display persistent individual differences that remain stable despite the turnover in individual alters. We also show that call, text, and mixed signatures resemble one another both at the population level and at the level of individuals. The consistency of social signatures across individuals for different channels of communication is surprising because the choice of channel appears to be alter-specific with no clear overall pattern, and ego networks constructed from calls and texts overlap only partially in terms of alters. These results demonstrate individuals vary in how they allocate their communication effort across their personal networks and this variation is persistent over time and across different channels of communication.
#Social_signatures, #Social_networks, #Egocentric_networks, #Mobile_phones
powerlaw:A Python Package for Analysis of Heavy-Tailed Distributions
https://pypi.org/project/powerlaw/
PyPI
powerlaw
Toolbox for testing if a probability distribution fits a power law
🔹 Computational Methods in Physics
Department of Physics, Sharif University of Technology, Fall 2017
Lecture Notes are available in Farsi. Here is the list of released ones:
http://sharifcompphys.ir/course-materials/lecture-notes/
Introduction
Fractals
Surface Growth
Percolation
Random Walk
Random Number Generation
Integrating
The Metropolis Algorithm
Canonical Ensemble
Ising Model
Department of Physics, Sharif University of Technology, Fall 2017
Lecture Notes are available in Farsi. Here is the list of released ones:
http://sharifcompphys.ir/course-materials/lecture-notes/
Introduction
Fractals
Surface Growth
Percolation
Random Walk
Random Number Generation
Integrating
The Metropolis Algorithm
Canonical Ensemble
Ising Model
به کسانی که قصد انتخاب گرایش سیستمهای پیچیده در دانشگاه شهید بهشتی رو دارن، پیشنهاد میشه این سه نوشته رو بخونند:
🔹 http://facultymembers.sbu.ac.ir/jafari/Complex%20systems/Complex-persian.htm
🔸 http://www.sitpor.org/2017/01/complexsys1/
◽ http://www.sitpor.org/2018/05/complex-systems-basics/
🔹 http://facultymembers.sbu.ac.ir/jafari/Complex%20systems/Complex-persian.htm
🔸 http://www.sitpor.org/2017/01/complexsys1/
◽ http://www.sitpor.org/2018/05/complex-systems-basics/
🐛 بعد از کرم الگانس، شبکه سیستم عصبی موجود دیگری هم به دست اومده که اتفاقا اون هم جهانکوچک هست:
https://elifesciences.org/articles/22497
A second nervous system has now been fully mapped (along with C. elegans) and it too is a small world. All hail the tadpole larva of a sea squirt, and its marvelously tiny connectome of 177 neurons.
https://t.co/kO3tlEVq5x
https://elifesciences.org/articles/22497
A second nervous system has now been fully mapped (along with C. elegans) and it too is a small world. All hail the tadpole larva of a sea squirt, and its marvelously tiny connectome of 177 neurons.
https://t.co/kO3tlEVq5x
The report from the NSF Workshop “Multidisciplinary Complex Systems Research” is now available: https://t.co/LC1Df27GyE
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