I'm from China, and my name is Jiuning Chen (陈久宁). You can also call me Johnny as it pronounces the same as "Jiuning" in Chinese. As you can guess from my account name, I was born in 1994; not too young, and not too old.

I was a philosophy student, and now I'm a PhD student in mathematics. I enjoy sharing knowledges with others, yet I'm a slow learner, or at least I think so.

I use MATLAB, Python, Julia, Ansible, Docker for my daily work. Among those I enjoy Julia most. I heard people code ~100 lines in average per day, in that sense, I'm a poor programmer.

I do image processing and deep learning for my daily research. I do not want to be one of the too many in the overly optimistic typical deep learning fields; that's not very fun. Or in other words, I do not want to throw myself into a field that everyone is interested in; I don't think that's how innovation comes up. Nevertheless, I'm a poor scientist speaking of (the number of) publications so I can hardly justify what I just said.

A few noteworthy things I did since I became a programmer:

• I created and maintained the lab infrastructure for my supervisor in Math@ECNU
• I set up the first few Julia mirrors in China with StorageMirrorServers.jl
• I lead the JuliaCN community together with Jun Tian, Roger Luo and others
• I maintain the JuliaImages ecosystem together with Tim Holy and Zygmunt L. Szpak
• I'm an active JuliaImages mentor during GSoC (Google Summer of Code) and OSPP (Open Source Promotion Plan) events

I said I enjoy sharing my knowledges with others, here are a few tutorials I made (in Chinese):

• Julia 入门系列之一起读文档 (Learn Julia by reading the docs together with me) in Bilibili
• Julia 语言及其应用 (a series of lecture that introduces Julia in ECNU) with its materials here
• Julia 代码中的典型设计模式 in JuliaCN 2021 meetup in bilibili
• (总有一天会写完的) Julia 数字图像处理入门

There are a few other personal projects for research and fun, listed in stars-count order:

• jill.py: a cross-platform julia installer written in Python
• DemoCards.jl: manage Julia demo gallery automatically
• Sixel.jl: display image in terminal
• JpegTurbo.jl: JPEG support via libjpeg-turbo
• ecnu_net_login: 华东师范大学 校园网网关一键登录 (login ECNU network in terminal, the simple way)
• PkgServerClient.jl: sets julia package mirror smartly
• colab-julia-bootstrap: template used to set up Julia in Google colab
• WNNMDenoise.jl: WNNM (Weighted nuclear norm minimization) for image denoise
• LocalBinaryPatterns.jl: local binary patterns as a family of low-level image features

I use macOS most of the time because I think it's the best interface for programmers even though it is not as customizable as Linux or as powerful as Windows.

"This world doesn't need a hero, it needs a professional" -- Geralt of Rivia

I dislike competition, I enjoy collaboration. I'm bad at advertising. I enjoying fixing things by breaking it up.

I just paused my Ph.D career and am working fulltime in tongyuan.cc for the next year (or next two years) to try to bring Julia in China to the next level. It's a full-time job (career) that I plan to devote most of my time to, thus so I'm afraid that I don't have much time contributing freely to personal projects.