Only Truth Matters

1. Intro

Select the most common material and study each in detail

In each category, explore

• Physical Properties: Density, melting point, thermal conductivity, etc.
• Mechanical Properties: Strength, hardness, elasticity, etc.
• Chemical Properties: Resistance to corrosion, reactivity, etc.
• Applications: How and where the material is commonly used.

2. Metal

Iron: Fe

• 8g/cm3
• 1538 melting
• Pure iron is soft
• Mainly used in construction, automobile, tools and machinery

Aluminum

• 2.7g/cm3
• 660 melting
• Moderate strength
• Form oxide layer protect from further corrosion
• Mainly used in packaging, transportation, construction, power line

Copper

1. Nerve in Bone?

Yes, nerves present in bones, not as dense as in other tissues

Distribution

• CNS: brain and spinal cord
• PNS: from brain and spinal cord, extending to all parts of body
  • Somatic: control voluntary movement
  • Autonomic: control involuntary function like heart rate, digestion
  • Enteric: 肠胃

2. Different Type of Fried Chicken

American: deep fried or pan fried

Korean: double fried to achieve extra crispy exterior

Keep Juicy:

• Brining or marinating
• Cooking temp and time
• Cut: dark meat tend to be jucier
• Breading: thicker

3. Parking System

1. Mac And Cheese

Macaroni and cheese, traced back to Italy

• Pasta cut into 2-inch squares, cooked in water, and tossed with grated cheese

Nowadays, using elbow macaroni and cheese source, has roots in 18th-century England

1.1. As a Meal?

• Add vegetables
• Choose whole-grain pasta
• Moderate cheese and fat
• Watch portion size

2. Hair Grow Speed

1.25 cm per month

Age: fast when children, slow down starting 20s and 30s

Gender: men slightly faster, more likely to experience hair loss

1. Intro

Understanding and manipulating the properties of materials to create new or improved products, encompasses

• Chemistry
• Physics
• Engineering
• Biology

How to? Understand the basics, dive deeper into material properties, learn about material processing, explore material characterization, apply to real-life application

1.1. Fundamental Principle

Structure influence the property, in different level (atomic, microscopic, macroscopic)

Properties and performance could be optimized

1.2. Goal

Developing new material

Improving existing material

1. Shampoo Purpose

• Removing dirt and oil
• Cleansing the scalp, essential for healthy hair growth

2. Durian and Jackfruit

Not closely related

• Same broader grouping of flowering plants

3. Cigar and cigarette

Cigar vs. Cigratte

• 30min-2hr vs 5-10min
• hold in mouth vs inhaled into lungs
• flavor: wide variety vs consistent

Pleasure:

• Cigar: flavor and aroma, relaxation, status, ritual
• Cigarette: nicotine, habit, sensory

1. Heat Milk, What Left

Evaporated Milk, reduce water content about 60%

Milk Powder: dryness

2. What’s the zizi Sound when Fry

Interaction between the hot pan and the moisture within the meat

• Evaporation of moisture
• Maillard reaction

3. What is Pink Source

A combination of cream and tomato sauce, creating a pinkish hue

Generally include: cream, garlic, onion, and sometimes vodka

4. Red Bull Sports Team

1. Knee Joint Sound

Joint crepitus

Reason:

• Gas bubbles
• Tendons and ligaments
• Articular surfaces

Harmful?

• Occasional popping is harmless

How to avoid:

• Exercise, maintain joint function and reduce chances of joint problem
• Stay flexible
• Maintain healthy weight
• Avoid repetitive stress

2. Samyang vs. Rokinon

Samyang: South Korean company manufacturing photographic lens since 1970s

1. How Insurance Industry Works

Risk management tool designed to help individuals mitigate the financial impact of unexpected events

Basic model:

• Risk pooling, the losses of the few are paid for by the many
• Law of large numbers: as the size of sample grows, the actual loss will approximate the expected loss experience
• Insured parties pay premiums in exchange for coverage
• Investment Income: insurance companies collect premiums, in the interim, they can invest to earn return

Modern trends

• Insurtech: Startup offer things like peer-to-peer insurance, on-demand insurance
• Big Data: help refine the risk assessment models
• Telematics: device tracking driving behavior to price premiums

2. Smog Test

Procedure to evaluate the amount and type of pollutants, help improving the air quality

• From “Smoke” and “Fog”

3. Pineapple Flesh

1. Windows Kernel: CE NT

CE: compact edition, designed for embedded system like PDA, handhelds

• Modular system, compact and efficient
• File system: FAT
• Real time capabilities

NT: new technology, designed for desktops, workstation

• Hybrid kernel, combine microkernels and monolithic kernel
• File system: NTFS

2. Plastic Surgery

Plastic: from Greek word “Plastikos”, means “to mold” or “to shape”

Two type

• Cosmetic: reshape normal structure to improve
• Reconstructive: performed on abnormal structures

3. Duplex Printer

1. USB vs Serial

Serial: one bit at a time, in a sequence

• Most common standards is RS-232

COM: communication port, referred to physical RS-232 serial ports

• In most modern computer, the COM port is generally simulated

On board, there is a additional chip act as USB-to-serial converter

2. Network Address Start with //

Universal Naming Convention (UNC) path

• Used mainly for local area network, in Windows
• Why? provide a standardized way to access shared resources across a network

Advantage