1. Difference between Beef/Chicken/Pork
Muscle structure
- beef more muscle mass
- chicken lighter and delicate muscle
- pork in between
Myoglobin content: 肌红蛋白
- giving meat its red color
- highest in beef, then pork, chicken least
Fat content
- beef more marbled fat content, make it juicer and rick flavor
- pork has a distinct fat profile
- chicken depend on the part
1.1. Chicken White?
Muscle that are used
- regularly and for extended activities have more myoglobin
- short bursts like flight, have less myoglobin
White meat: breast and wing
Dark meat: legs and thigh, still significant lighter than beef
2. How Stainless Steal Made and Works
Reason: minimum of 10.5% chromium, and other element like nickel, molybdenum, carbon and nitrogen
2.1. Chromium
The chromium in the steel reacts to oxygen to form a thin, invisible layer on the surface, extremely adherent and protective
Feature: self-healing
2.2. Limitation
Not entirely impervious. Not good in
- low oxygen
- high salinity
3. US Police System
3.1. Car
Police car: city police department use it, for patrolling city streets, conducting traffic stop
Sheriff car: county sheriff use it, role vary by state, in general enforce the law that not covered by city police
K9: any law enforcement agency employ K9 units, like city police, county sheriff, state police. Used for variety of task like searching drugs, explosives, missing persons.
- Specially equipped to ensure the safety and comfort for the dog
- The word come from canine, the Latin word for ‘dog’
3.2. Police System
Layered and decentralized law enforcement system
State police: patrol highway, rural areas
City police: enforce city ordinances
County sheriff: in addition to law enforcement, often run jail, security for county courthouse, serve legal documents
3.3. Sheriff
Shire: means district
Reeve: means guardian
Police: origin in Greek word “polis”, means city
3.4. 911? Which Layer?
The public safety answering point would choose different agency according to the location and emergency
4. Phase Detection?
PDAF:
- splitting incoming light into two images 2. Comparing two images
- if not aligned: out of focus
- By determine the direction and how much misaligned, the camera can quickly adjust the lens
Pro:
- Faster to focus
- Better for tracking
Con:
- Require additional hardware
- Need calibration
4.1. How it Works
Phase detection pixel has two microlense
- lead to two slightly different perspective of subject
If in focus
- two array would be the same
If not focus
- subtracting one array from the other would result in non-zero values
5. Why Ear Wax
Evolutionary perspective
- Protection: from dust, particles
- Lubrication: without it, easier to get cut and infections
- Waterproofing
- Detering insects