Simple solutions to complex problems

Simple solutions to complex problems

Each post is devoted to a simple solution to a complex problem.


A simple way to turn your old laptop into a security monitoring device

28 Mar 2022 1 minute read 30 comments I_g_o_r

In this post we consider how to turn your old laptop into a security monitoring device. In the example below an old Asus EEE PC (1st generation) is used.     This laptop does not have an internal web camera, therefore an external usb webcam will be...

A simple way to generate easy recoverable Ethereum private/public keys and an address

25 Mar 2022 5 minute read 15 comments I_g_o_r

In this post we consider a simple way to generate easy recoverable Ethereum private/public keys and also an address on the Ethereum blockchain. This triplet is an Ethereum wallet. If you will lose your private key, you will be able to recover it by r...

Simple ways to make probabilistic forecasts

18 Mar 2022 4 minute read 6 comments I_g_o_r

Probabilistic forecasts allow traders/investors minimize loses and maximize profits in their trading/investment strategies. There are many methods to make forecasts (see [1-3]). In the previous posts (see [4-6]) we considered examples of how to use p...

A simple procedure to practice friendly arbitrage.

12 Mar 2022 1 minute read 1 comment I_g_o_r

In one of the previous posts we had considered the method of friendly arbitrage (see [1]). In this post we consider a simple procedure to practice this method. The table below presents all steps of this procedure. An example also is given below. Exa...

A simple way to increase your income when values of cryptos go up

11 Mar 2022 5 minute read 2 comments I_g_o_r

Cryptos are volatile assets. Sometimes they go up, but some times they go down. When they go up it is easy to make money by buying cryptos and watching how their values increase. But there is a simple way to multiply income in this case by means of l...

A simple solution to the cryptos mass adaptation problem

4 Mar 2022 1 minute read 8 comments I_g_o_r

For many years marketing companies are trying different methods to make cryptos adapted by masses, but without any success. Today, the cryptos mass adaptation problem is similar to the problem of mass adaptation of computers in the 20-th century. Sin...

A simple way to make money when values of cryptos go down

4 Mar 2022 5 minute read 7 comments I_g_o_r

Cryptos are volatile assets. Sometimes they go up, but some times they go down. When they go up it is easy to make money by buying cryptos and watching how their values increase. When they go down values of cryptos portfolios also go down. Passive in...

Simple optimal betting/investment strategies

26 Feb 2022 7 minute read 4 comments I_g_o_r

1. Martingale type’s betting systems Martingale betting systems are considered the oldest optimal betting systems, which guaranty a positive profit to a player if the player has infinite starting capital (bankroll). In these systems a size of bets is...

A simple way to do a regression analysis

19 Feb 2022 2 minute read 0 comments I_g_o_r

In this post we perform a regression analysis of a death rate from Covid-19 as a dependent variable (Y) and an average yearly temperature as an independent variable (X) for countries for which data is available. In other words, we are looking for a f...

A simple way to solve the problem of lost or forgotten portable keyboards

12 Feb 2022 1 minute read 1 comment I_g_o_r

There are many interfaces between humans and electronic devices on the current market. The most popular are wired or wireless keyboards, touch-pads, pointing sticks, etc. Most of these devices require a flat surface, for example a table, to be conven...