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English

Riley and Vasarely are two noteable artists who made contributions in the illusory world of op art. A style with graphic abstraction and pattern-oriented optical effects (mid-20th century).

The boxer suffered from many blows in the boxer ring.

Ginseng is a medicine made from the root of a Chinese plant, that some people think keeps you young and healthy.

A period of life characterized by physiological and psychic change that marks the end of the reproductive capacity of women and terminates with the completion of menopause.

Squat is often used in negative sentences for emphasis. He had a job that paid him squat.

The mother was all on edge when her son was having a blood test.

Contrary to Bill Clinton's claim that he never got special favors, his uncle pulled strings and ran a "concerted lobbying campaign" that helped the Democratic presidential candidate dodge the Vietnam draft, the Los Angeles Times reported yesterday.

The other day when I was sitting in my basement with Nate and this female I had to third wheel it.

High seas are the open seas of the world outside the territorial waters of any nation.

OS

interrupts

synchronous: caused by CPU (Divide by zero, System call, Bad pointer derefernce) asynchronous: caused by an external event (device I/0, timer ticks)

Intel nomenclature

Interrupt: asynchronous interrupts Exception: synchronous interrupts

x86 interrupts

interrupts types (0-255):

  • Type 0-31 are for processor interrupts, fixed by intel
  • Type 13 general protection fault (An unauthorized int instruction)
  • Type 14 always for page faults
  • Type 32-255 are software configured
  • Type 32-47 are for device interrupts (IRQ) in JOS
  • Type 0x80 interrupts for system call in Linux
  • Control jump to kernel. Kernel code runs and handles the interrupt.
  • The register state of the program (sometimes extra info in CPU registers E.g., page faults store the address that caused the fault in the cr2 register) is dumped on the kernel's stack.
  • When handler completes, program resume (see iret instr.)

Powershell

netsh int ip set address name="Lan" source=static add=172.16.5.41 \
    mask=255.255.255.0 gateway=172.16.5.254;
netsh int ip set dns name="Lan" static 219.232.48.61;

Misc

host www.google.com
www.google.com is an alias for www.l.google.com.
www.l.google.com has address 64.233.189.104
www.l.google.com has address 64.233.189.147
www.l.google.com has address 64.233.189.99
www.l.google.com has address 64.233.189.103
www.google.com has address 74.125.115.147

Bioinformatics

The four letters of the DNA alphabet are adenine, thymine, guanine, and cytosine.

A gene is a DNA sequence which acts as a template for building a specific protein.

The genome of a bacteria is typically about 1 million base pairs long.

Viruses are simplest organisms which require a living host. Its genome is about 10,000 base pairs long.

The human genome is about 3 billion base pairs long.

The homology between genes in different organisms is a natural consequence of evolution.

PCR stands for polymerase chain reaction.

Gel electrophoresis separates DNA fragments by the lengths of DNA sequence based on their movement speed in electrically charged Gel.