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0916 Question

1. Food Mold, Why, What

Why? Mold spore landed on it and found the environment suitable for growth

  • Mold is a type of fungus
  • Presnet nearly everywhere in the environment

Good Environment:

  • moisture
  • food source
  • suitable temperature

White ball and string:

  • String are likely mycelium (菌丝), penetrate the food source and absorb nutrients
  • Ball might be the begining of sporangia (孢子囊), produce new spores into the environment

2. Blind Language – Braille

Braille (盲文)

Tactile writing system invented by Lous Braille, 1824

Basics:

  • use combination of raised dots to represent letter, number, punctuation marks
  • Each Braille character or cell is made up of six dots, arranged in two column of three dots each

Grade: different grade vary in complexity

  1. Grade 1: straight forward representation, represent single letter, number or mark
  2. Grade 2: more advanced and commonly used form. Include contractions (abbreviation)
    1. b stand for but / c stand for can
  3. Grade 3: more personal, mainly used for personal note-taking

2.1. Universal?

The 6 dot system is universal, but the representation vary

Chinese Braille is based on pinyin system

Japneses Braille is a combined Kanji and Hiragana and Katakana

2.2. Speed

English

  • Braille: 100-200
  • Sighted: 200-300

Chinese

  • Braille: 80-180
  • Sighted: 250-300

2.3. Logic

A-Z: ordered

Number has number sign, a is the same as 1

3. Why M43 lens has Shorter Minimum Focus Distance

Since the focal length is shorter, while deliver the same FOV

What determine the minium focus distance?

  • Focal length
  • Optical Design
  • Physical constraints

3.1. What Makes Macro Design

  • Floating element design
  • Longer focus throw (rotate more to focus)
  • Flat Field Focus: flat field curvature

4. Why need Toaster

Function

  • Browning and crisping: more flavorful
  • Variety

Benefit

  • Speed, convenience
  • Safety
  • Space, energy efficiency