$$ \newcommand{\dint}{\text{d}} \newcommand{\vphi}{\boldsymbol{\phi}} \newcommand{\vpi}{\boldsymbol{\pi}} \newcommand{\vpsi}{\boldsymbol{\psi}} \newcommand{\vomg}{\boldsymbol{\omega}} \newcommand{\vsigma}{\boldsymbol{\sigma}} \newcommand{\vzeta}{\boldsymbol{\zeta}} \renewcommand{\vx}{\mathbf{x}} \renewcommand{\vy}{\mathbf{y}} \renewcommand{\vz}{\mathbf{z}} \renewcommand{\vh}{\mathbf{h}} \renewcommand{\b}{\mathbf} \renewcommand{\vec}{\text{vec}} \newcommand{\vecemph}{\text{\emph{vec}}} \newcommand{\mvn}{\mathcal{MN}} \newcommand{\G}{\mathcal{G}} \newcommand{\M}{\mathcal{M}} \newcommand{\N}{\mathcal{N}} \newcommand{\S}{\mathcal{S}} \newcommand{\diag}[1]{\text{diag}(#1)} \newcommand{\diagemph}[1]{\text{\emph{diag}}(#1)} \newcommand{\tr}[1]{\text{tr}(#1)} \renewcommand{\C}{\mathbb{C}} \renewcommand{\R}{\mathbb{R}} \renewcommand{\E}{\mathbb{E}} \newcommand{\D}{\mathcal{D}} \newcommand{\inner}[1]{\langle #1 \rangle} \newcommand{\innerbig}[1]{\left \langle #1 \right \rangle} \newcommand{\abs}[1]{\lvert #1 \rvert} \newcommand{\norm}[1]{\lVert #1 \rVert} \newcommand{\two}{\text{II}} \newcommand{\GL}{\text{GL}} \newcommand{\Id}{\text{Id}} \newcommand{\grad}[1]{\text{grad} \, #1} \newcommand{\gradat}[2]{\text{grad} \, #1 \, \vert_{#2}} \newcommand{\Hess}[1]{\text{Hess} \, #1} \newcommand{\T}{\text{T}} \newcommand{\dim}[1]{\text{dim} \, #1} \newcommand{\partder}[2]{\frac{\partial #1}{\partial #2}} $$

Journey to the West

Some stories from my last winter solo trip to China. I traveled from Far East China to Far West China, which means that it was my Journey to the West.


What an astonishing thing a book is. A book is proof that humans are capable of working magic. This is my life story about books.

Merapi National Park, Part 2

Exploring the western part of Mt. Merapi National Park. Will it be as good as the eastern part? Will the trails be better? Read on.

Merapi National Park, Part 1

Exploring the Mount Merapi National Park trails. In this post, I'm exploring the eastern part of the national park: Pronojiwo Hill.

Kosakora Hike

Kosakora hill, is located in Gunung Kidul regency, Yogyakarta. It offers a good trail, which consists of beach and karst hills, and an awesome summit.

Twitter Authentication with Tweepy and Flask

A tutorial on how to do Twitter OAuth authentication in Flask web application.

Imogiri Hike

Imogiri located at mid-eastern part of Yogyakarta. People know it better for its royal tombs of Mataram Sultanate. Who knows it has a good hiking trails? I certainly didn't.

Nglanggeran Hike

Nglanggeran is a ancient volcano site located in Gunung Kidul, Yogyakarta. It's a great place to hike, with great vista at the summit.

The Best Pool in Jakarta

Recently I finally found the best swimming pool in Jakarta. Which one is it? Well, read on!

Tempus Fugit, Carpe Diem

Time flies, hence seize the day! Aka, life is too short to not doing something meaningful!