Each post is devoted to a simple solution to a complex problem.
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...
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...
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...
8 Feb 2022 1 minute read 6 comments I_g_o_r
Epidemics of harmful viruses and bacteria such as SARS, MERS, H5N1, H1N1 or COVID-19 demonstrated that our society has no an efficient method to prevent spreading of harmful new viruses and other pathogens. Vaccinations can not be efficiently used as...
2 Feb 2022 3 minute read 4 comments I_g_o_r
Friendly arbitrage is a set of deals among three (or more) friends on an outcome of an event, that guaranties a person, who made the two deals, a profit regardless of an outcome of the event. In this post we consider two examples of such arbitrage. E...
26 Jan 2022 5 minute read 16 comments I_g_o_r
A simple way to defend yourself against multiple viruses (including Covid-19) is to increase the concentration of vitamin D in your blood (see [17]). It is well known fact that the most efficient way to reduce chances of being infected and die from v...
19 Jan 2022 1 minute read 0 comments I_g_o_r
There are three typical cases when a phishing attack happens. Case 1. An attacker is trying to convince a user (via e-mail, SMS, or phone call) to visit a fraudulent website, which looks like the legitimate website. If the user follows the directions...
12 Jan 2022 3 minute read 5 comments I_g_o_r
A simple solution to the private key-loss conundrum. 1. Problem Statistically, over 10% of users forget or lose their passwords or private keys for encrypted data. This is not a big problem if there is a password or private key recovery option, but i...
7 Jan 2022 4 minute read 4 comments I_g_o_r
In our time, everyone who uses computers or the internet needs passwords to access online accounts. Even access to devices, as well as virtual andphysical places may require passwords, PINs, or access codes. Some studies (see [1-4]) indicate that a...
