preeclampsia

Finally, it bloomed. This is a hybrid of Japanese alpine rhododenrons. I got this four years ago. It had grown slowly but never come to flower. With camera, can't show its real elegance. The milky color with a yellow hue. The petals are so thin as to be translucent. Lucent technologies bell labs.

retinopathy of prematurity

It has took me more than ten years to have an intuitive picture of ∇×∇=rot.　When knowing this concept in class, I could not understand why this means rotation. ∇= (∂/∂x, ∂/∂y,∂/∂z) was easy to see: how steep the slope is. But, ∇×∇was not such straightforward to picture what the formula means. I asked the teacher for intuitive interpretations. He answered something. It only confused me even further. I kind of gave up grasping the meaning, and tried to learn how to use it to solve problems.

Ten years since then, one mid night, I remembered this for some reason and googled "∇×∇=rot, intuitive, image (in Japanese)". The one-decade-long question was solved in 0.21 seconds. I was so exhilarated and called to many people to deliver my pleasure. Their responses were all cold and sleepy. I think they were merely jealous of me.

A Qdoba in St. Louis, MO.
Photographer: seno minoru.