Sweet Potato Blog

20231111 - Introduction 1 20231111 - 1 Where Should You Start? 7 Things are quite obvious. If there is no enough money saved, it's meaningless to invest it. So, all people should focus on saving for quite a few years. 20231111 - I Saving 13 20231111 - 2 How Much Should You Save? 15 The major issue for most of people is that they don't have habit of saving money for investment. As I know, most of people only save money for oversea trip or new car or house upgrade, etc. That means they will never get enough money for investment. 20231111 - 3 How to Save More 24 There are many ways to get higher income, but they are just symptoms. I think the most important tip is to use spare time wisely. Reading may be the most effective way to improve ourselves. 20231112 - 4 How to Spend Money Guilt-Free 40 I like neither of the two ways. The easy way is to avoid wasting money. We should not spend money on anything that we may regret in a few years. For large purchase, we'd better wait for ...

20231029 - Prologue: Never Get High on Your Own Supply 1 Screen and Internet have changed our lives forever. We have no choice but adapt to the new environment. Why many people believe that communication through SMS is better than face to face? The illusion of self-protection and advantages of ignoring negative consequence? The cost of communication through Internet is lower than face to face talking. Part 1 What is Behavioral Addiction and Where Did it Come From? 20231029 - 1 The Rise of Behavioral Addiction 13 "The reward was so great that they would need to find a way to pass the time until the next reward was available." p57 Why boredom is so unbearable after getting unexpected reward? This reminds me of the idiom story "守株待兔", which means "wait for gains without pains". Normally we need to pay price to get reward, which means no pain go gain. But addictive stuff give us another possibility. We can feel happy through drug, instead of hard work. We can ...

20231129 - Chapter 1 20231129 - Chapter 2 20231129 - Chapter 3 20231129 - Chapter 4 20231129 - Chapter 5 20231130 - Chapter 6 This book is better than I thought! How can we avoid the similar mistakes those farm animals made? 1. Don't be lazy We need to learn, think and discuss things together, when life is good. Bad days may come anytime. Hard work itself is not enough. It doesn't guarantee good life in long term. 2. No one should be stay in power for too long time 3. Need check and balance of power Only ambition can go against ambition. Independence of justice system is critical. 4. Democracy has its own weakness "Tyranny of the majority" is real. That's how the benefit of cats and dogs are sacrificed by admitting rats are friends. 5. Education is also critical Nazies and extremists are formed when they were young. 20231211 - Chapter 7 20231211 - Chapter 8 20231211 - Chapter 9 20231211 - Chapter 10 One bug of this book: everyone is Napoleon. The whole society is ...

20231016 - 1 The structures in our lives — or how to communicate with engineers I never thought about the world this way. There are so many things that we are so used to them, and then we don't pay attention to them. Does this understanding help our lives anyway? 20231019 - Part One - The difficult birth of the science of elasticity 20231019 - 2 Why structures carry loads — or the springiness of solids Force applys to molecules and atoms, which cause completely different effect on different material. The world is amazing. 20231019 - 3 The invention of stress and strain — or Baron Cauchy and the decipherment of Young’s modulus Stress and strain; strength and stiffness. Stress is the force per unit area, strain is the shape change per stress. Strength is the stress need to damage the material, stiffness is capability to maintain the shape after stress. In old days, the progress of technology, is more about natural selection. People don't know why something works, so they don'...