In this blog post, we will introduce the principles and various techniques used by smartphones to accurately measure location indoors and outdoors using GPS and beacons. Smartphones use various location measurement technologies to measure their location in various terrain environments. There are two types of location: absolute location and relative location. Absolute location is a location...
In this blog post, we will look at the changes smartphones have brought to our lives and the hidden problems of addiction, especially their impact on children and adolescents. Smartphones become part of everyday life The world is changing rapidly in the wake of the information revolution. These changes are clearly evident in the field of mobile communications. In the early 1990s, pagers...
In this blog post, we will look at how smart grids can solve the problem of blackouts caused by power storage limitations and frequency mismatches. On September 15, 2011, a large-scale power outage occurred suddenly in Gangnam-gu and Yeouido in Seoul, South Korea, as well as in Gangwon and Chungcheong provinces. This was the first time such a simultaneous power outage had occurred in South...
In this blog post, we will examine the limitations of the Copenhagen interpretation through Schrödinger’s cat, a representative thought experiment in quantum mechanics. Quantum theory is a physical theory that explains the microscopic world. The microscopic quantum world refers to a world that is approximately 1 nanometer in size. Until the 19th century, classical mechanics...
In this blog post, we will look at how the piezoelectric effect and crystal oscillators can be used to measure extremely small masses such as gas molecules and DNA, and explore some of their applications. Scales commonly measure mass by using the principle of levers or by measuring changes in electrical resistance. So how do ultra-high-precision scales measure the mass of microscopic...
In this blog post, we will examine how shop windows go beyond simple display spaces to stimulate our desires and identities. Shop windows are one of the representative cultural symbols of consumer society. Just as we read the cover and table of contents before reading a book, shop windows allow us to enter the spatial text of consumer society. “Text” is a term that refers to all artifacts...
In this blog post, we will examine the validity of the shutdown system, focusing on its effectiveness, side effects, and impact on the freedom and rights of young people. Controversy and unfairness of the shutdown system Recently, there has been controversy on the internet regarding the “shutdown system.” According to a Korean newspaper article published on October 14, there have been...
In this blog post, we analyze from various perspectives whether South Korea’s shutdown system is actually effective in protecting young people or whether it is causing side effects. What is the shutdown system? The shutdown system is a technical measure implemented by the Ministry of Gender Equality and Family of South Korea that restricts internet game access for youth under the age...
In this blog post, we will introduce a method of measuring distance using the brightness cycle of stars and its connection to the expansion of the universe. In the early 20th century, American astronomer Slipher discovered the phenomenon of “red shift” while studying the spectra of stars in external galaxies. Red shift refers to the shift of absorption lines in starlight from external...
In this blog post, we will examine the practical limitations and side effects of sex trafficking laws and explore how legalizing sex trafficking could be a solution for protecting women’s rights and solving social problems. This brings to mind the old saying, “Red-light districts protect the chastity of women in their homes.” This expression is a metaphor for how difficult it is to...