cocothink / miscellaneous

A collection of personal learning materials and projects

Random Study Notes

This repository has a bunch of problems which I've been (weirdly) obsessed about. Upon digging into and solving (at least partially) them, I've also learned things (useful or not). Here it is, a collection of my study notes!

Contents

Toggle Format JSON: This is a chrome extension for getting JSON object of a ENCODE portal page.

• This extension can be activated by clicking the icon in toolbar or by keyboard shortcut "Ctrl+Shift+Y".
• This extension only works on ENCODE website (*.encodeproject.org or *.encodedcc.org).
• If the page is a plain (rendered) page, this extension will try to open the corresponding JSON page by appending one parameter "format=json" to the url.
• If the page is a JSON page, this extension will try to open the corresponding rendered page by removing "format=json" in the url.
• The new page will be opened in the same tab.

关于破解《伊岚翠》的字体乱码加密: Solve the Mojibake problem in a chm file.

• Unpack encrypted font file from chm;
• Perl decompress eot file to ttf font;
• Checkout cmap in ttf file (open source format);
• 1 encrypted code -> 1 character in word with encrypted font (Alt+X) -> 1 character in pdf -> 1 OCR Unicode character -> 1 Unicode
• VBA decrypt in MS Word

浅谈pdf乱码: Solve the Mojibake problem in a pdf file.

• pdf digital structure
• pdf logical structure (with pdftk)
• pdf decode process, from CID to GID
• ToUnicode map

swf-pdf-doc88

• Handle binary file in python
• zlib decompression in python
• swf header structure

Windows-10-wifi-auto-logon

• NCSI and its log in Windows Vista and above
• Windows event filter in XML format
• Task scheduler in Windows 10
• NetworkProfile log
• Connect wifi in Windows cmd

Human-Resource-Machine

• Implementing basic algorithms with assembly language
• Optimization of assembly language

Fix for using juicer HiCCUPS tool with glibc 2.12

• Come to this problem when trying to use juicer HiCCUPS tool on school's cluster, which has GNU libc at version 2.12. The following error

  java.lang.UnsatisfiedLinkError: /tmp/libJCudaRuntime-0.8.0-linux-x86_64.so: /lib64/libc.so.6: version `GLIBC_2.14' not found (required by /tmp/libJCudaRuntime-0.8.0-linux-x86_64.so)
  

  pops up, similar to the this closed issue. The problem is solved with the following steps:

  1. Extract jcuda native libraries build with glib 2.12 from this zip file and put it under desired path (for example, /path/to/jcuda)
  2. Use the HiCCUPS with jcuda native libraries above specified by -D option. Pre-load module and library if needed. For example,

     ml cuda/8.0
     export LD_PRELOAD=/usr/lib64/nvidia/libcuda.so.1
     java -Djava.library.path=/path/to/jcuda/lib64/ -jar /path/to/juicer_tools.1.7.6_jcuda.0.8.jar hiccups local/folder/HIC006.hic local/folder/hiccups_results

tinc VPN

• Setup on tinc VPN node on cloud (Ubuntu 18.04 as server) and another node locally (Ubuntu 18.04 as client)
• Change firewall as needed with VPN start up and tear down
• Redirect all network traffic on client to server