til_2020

### 2020-12-31

https://kidshealth.org/en/kids/blood.html - easy to understand; well written.

### 2020-11-30

• https://en.wikipedia.org/wiki/Window_tax - Window tax was a property tax based on the number of windows in a house. It was a significant social, cultural, and architectural force in England, France, and Ireland during the 18th and 19th centuries. To avoid the tax some houses from the period can be seen to have bricked-up window-spaces (ready to be glazed or reglazed at a later date).

### 2020-11-21

• “rc-alert -d T” will show release critical bugs in packages that are currently installed on a system but only those that affect the testing distribution. This is useful to figure out how many RC bugs my system will have if I were to upgrade from stable to testing (but without actually changing sources.list or downloading the packages etc.,)

tags | bugs affecting installed packages

### 2020-11-17

• Amazon launches online Pharmacy

### 2020-11-03

• Some real numbers $x$ have two infinite decimal representations. For example, the number 1 may be equally represented by 1.000… or as by 0.999… (where the infinite sequences of trailing 0's or 9's, respectively, are represented by “…”). Conventionally, the decimal representation without trailing 9's is preferred.
Ref:-

### 2020-10-25

  tags | password, api keys

### 2020-10-15

• The mediant of two fractions, $\frac{a}{c}$ and $\frac{b}{d}$ is defined as $\frac{a+b}{c+d}$
• If $a/c < b/d$ and $a, b, c, d \geq 0$, then

$\frac{a}{c} < \frac{a+b}{c+d} < \frac{b}{d}$ Ref:-

### 2020-10-11

• In zoology, a folivore is a herbivore that specializes in eating leaves.
• The giant panda is a folivore.
• The giant panda is also known as the panda bear or simply the panda.
• Female giant pandas are fertile for only 24 to 36 hours a year.

Ref:-

### 2020-09-21

• Debian Trends (debian.net)
• Internationalized Resource Identifier (IRI) is an enhanced version of URI which allows Unicode characters. This is in contrast to URIs where only ASCII characters are allowed.
Ref:-

### 2020-09-18

• Pydimarri Venkata Subba Rao composed the the National Pledge of India.