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1001 Question

1. Is Signature Really Useful

Several Purpose

  • Intent and consent
  • Verification
  • Deterrent to fraud
  • Historical precedence
  • Ritualistic role: make parties feel more bound to the terms

1.1. Digital

Electronic signature: just a image, can be easily forged

Digital signature: more secure, signer identity is verified using a certificate

2. Teeth Shape

Determined by genetics, evolution, function

  • Evolutionary factor
    • Canines: used as tearing food, display of aggression
    • As human evolved, jaw and teeth shape changed
      • Smaller jaw
      • Teeth became more adapted to a varied diet
  • Genetics: number, arrangement, and shape is coded in DNA
  • Function: incisors are designed for cutting and shearing; Canines are used for tearing and grasping;

3. Orange vs Mandarin, Lemon vs Lime

3.1. Orange and Mandarin

  • Orange originated from pomelo and mandarin
  • Mandarins, include tangerines(橘子, southeast Asia), clementines(柑橘, Algeria or China), satsumas(砂糖橘, Japan)

4. Spicy Hurt? Why Some People like it

Spiciness or heat is actually a form of pain sensation

  • Chemical: mainly capsaicin, 辣椒素
  • TRPV1 Receptors: heat sensitive channels, respond to temp above 42 C, capsaicin lower the temperature
  • Body response to the perceived heat

Why some people like it?

  • Complex psychological, physiological and cultural factors
  • Endorphin Release, similar to runner’s high
  • Adrenaline Rush

Famous Region

  • South Asia: Indea
  • Southeast Asia: Thailand, Malaysia, Indonesia, Vietnam
  • China: Sichuan, Hunan
  • Korea
  • Mexico
  • Caribbean
  • South America (Peru and Brazil)
  • US: Southwestern, Louisiana

5. 50MM vs Human Eye

Not about field of view, more about

  • Perspective: render a scene in a way that looks natural or normal to us in terms of perspective
  • Compression: provide similar distance relationship between objects

Nifty Fifty: 50mm F/1.8

  • Affordability
  • Image Quality
  • Compact

Nifty means particularly good