Friday, July 23, 2021

Sitting in the cafe, I just dropped my coffee cup and it broke down into the floor. Then I automatically pressed "Undo" button in the code editor.

How to choose business interview to watch - look at the position of the person being interviewed

 So if we would like to become a CEO, we search YouTube for "interview with CEO".

If we would like to create our own startup and become a founder, we search YouTube for "Interview with a founder"

Thursday, July 22, 2021

Strategy

Body posture
In soccer, we use our body to protect a ball. During war, we hold the position and defend it. So often defense is the best way of attack. Don't try to intrude. Just hold your position and let the enemy get tired.

Attack
As per Chinese generals, the battle is to be won before the battle. Planning is everything. The battle itself is just a formality to realize the plan.




Friday, July 16, 2021

Standards of future community (country)

Intro

One day I will create my own community (country, city or whatever). It will eliminate all the disadvantages current societies have. The following standards should be met:

Ecology

Saving our planet means saving our grandchildren. We don't want our descendants to be ugly mutants suffering from radiation.

Clean air

Polluting the air should be prohibited. Fire in any form will be allowed only in extraordinary cases. The best way to reduce CO2 exhaust is to stop producing it. For now, IMHO 95% of fires are to serve redundant people needs, which are not necessary to survive. 2020 covid pandemic proved tha tgovernments can easily force people to abstain from pleasure and other activities not necessary for survival. Of course, social needs, rest etc should be satisfied, but again, it could be done without fire.

Most food can be cooked without fire. Moreover, raw food is even more healthier than cooked (boiled, fried etc) ones.


Politics

Responsibility

The best way to hold politician responsible is to force him to live with his voters. Most politicians live in expensive houses behind the high fence and security guard. Politicians should live in apartments, or even better hostels with the poorest people of the country (which are the majority). So then the politician could hold a direct contact with the majority of his voters. Politician should eat in the shared kitchen with voters, 3 times a day, 365 days a year. Not once a year for TV camera like thy do now.

He can still be paid much, he deserves high salary and high pension for his work. However, he should not be allowed to live far from ordinary people, otherwise he will lose contact with them.







Wednesday, July 14, 2021

How to set up a solar panel

Intro

Here I will document my own learning is solar setup. I will update this post as I learn more.
I don't distinguish the way of panels use: whether on a vehicle, on a building or just separately. The main accent is of how to combine three main components: a panel, a controller and an invertor.

Choosing equipment

Criteria for any type of equipment:
Find certain brand on Amazon, and check:
- average reviews rating
- number of reviews
- the price (whether the current store overprices a lot)

How to choose a solar panel

Temperature Coefficient

The lower the better.

Warranty

Warranty of 25 years is usually provided by manufacturers. No warranty is a bad sign.

Monocrystalline vs Polycrystalline

Mono is more efficient and hence more expensive per square. So if we have much square space like on the building roof, we can use poly. Or, if we have less space like on the vehicle roof, we can use mono.

Brands

Panasonic
LG
Renogy

How to choose a battery

Criteria

Safety. Some batteries are toxic when charging or discharging. It is fine to keep a AGM/GEL/LiFePO4)
 battery in a living space.
Warranty. It should be.
Temperature range.
Maintenance.
Price.
Review rating on Amazon.

Types of batteries

Flood lead acid (or wet cell) batteries

They take lots of space, need regular maintenance. Disadvantage when we have a lack of space like in the vehicle (unlike a building). Charge slow. Trademarks: Trojan.

Sealed Lead Acid (AGM) batteries

Resistant to cold, easier to maintain. Trademarks: ExpertPower, Renogy, Universal, Mighty Max, WindyNation.

Gel Batteries

Great both for extreme heat and cold. Resistant to physical damage. Charge fast.

Lithium-Ion (LiFePO4) batteries

Best for solar. No maintenance required for about 15 years. Charge fast. Doesn't take much space. Easy to install.  Trademarks: Renogy. 

How to choose a controller

Ampers of the controller = next available value not less than (total watts of solar panels divided by voltage of the battery).
PWM or MPPT
150,200,250,600 V
Manual and auto EQ
Built in GFP and arc fault
Online status monitoring
Hyper VOC extend VOC limits
12-72 volt battery charging
Solar, wind and hydro MPPT modes
Brands:
Zamp

How to choose an invertor

Wattage of the inverter should be as total wattage of solar panels. 

Installation

Cover with a blanket

Cover the solar panels with a heavy blanket so that no sunlight is reaching the panels. This is important so that when we connect the wiring we don’t burn out the charge controller or any of the other electronic devices. Only uncover the solar panels once we are finished setting up the entire solar system and have all of the electronic cables in their proper position.

Stacks
We can multiply power by using stackable batteries and solar panels.



Thursday, July 1, 2021

Ethno Drum Fest - Kharkiv

Freedom is the most important need

Humanistic theory of Abraham Maslow listed basic human needs including socialization and self-actualization. However, it missed IMHO the most important human need: freedom. I believe in the modern society it is most important and most non-satisfied.

1000 years ago people were slaves of each other. Today, nothing changed. Children are slaves of parents at the young age. At least in the morning and in the evening. During the day, they are slaves at school. Then they become adults and fall into slavery of employers. At night, they are slaves for spouses.

Society and government consider all these institutes as normal (schools, jobs, marriage). It is logical because government per se was created as a form of slave owner. However, here we come to oxymoron and can catch government with its logic: apart from death penalty, the most serious sentence for a crime is imprisonment, i. e. restriction of freedom. In the prison, a man has everything he needs to be happy as per Abraham Maslow: food, social friends, ability for self-actualization etc. Still, imprisonment is the hardest penalty because of lack of freedom.

Today, we are all addicts of money. We sell our souls into slavery for money. We are though to do that. In the childhood, parents teach to study well to find a good job, to find good spouse etc. False and fake. Don't forget the Sermon on the Mount (Matthew 5-7):

No one can serve two masters, for either he will hate the one and love the other, or he will be devoted to the one and despise the other. You cannot serve God and money.

Sometimes I think up a joke and then loudly laugh at my own joke. Is it normal ?