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