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...
Is prostitution a crime that should be banned, or should it be institutionalized as a form of labor?
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...
What is the standard for an “ideal life” that is more important than success?
In this blog post, we will revisit what true success is and talk about the values of an ideal life with conviction, leisure, and confidence. A man confesses his love to the woman he loves. Someone who is confident would confess their love in a suit with flowers in hand at a fancy location, but someone who is timid would confess their love via KakaoTalk while lying in bed. Some people may...
How can coal be made more efficient and cleaner through pretreatment?
In this blog post, we will explore how the pretreatment process of coal increases combustion efficiency and reduces environmental pollution. The coal we commonly know is called briquette coal, which is coal that has been refined. Basically, coal consists of moisture, carbon, ash (the part that becomes ash after combustion), and volatile matter (volatile components). The only part we use...
Why hasn’t altruistic behavior disappeared in the struggle for survival?
In this blog post, we will look at how altruistic behavior has survived through evolution, focusing on the group selection hypothesis. How did giraffes, which used to have short necks, develop long necks? Why are moths, which used to be mainly white, now mostly black? Why are modern pests not easily killed by pesticides? The answer is closely related to Charles Darwin’s theory of...
Why is the Internet of Things at the center of the Fourth Industrial Revolution?
In this blog post, we will examine the definition and components of the Internet of Things (IoT) and look at examples of its use in industry, personal life, and the public sector to understand why it is considered a core technology. Humankind has always craved change. Political systems have changed through various revolutions, and science has advanced through the pursuit of curiosity. This...
How can human hands operate smartphones?
In this blog post, we will learn about the principles of capacitive touch screens, the flow of electricity, and how our bodies act as conductors. In 2024, the top 10 global brand rankings will include Apple, Microsoft, Amazon, Google, and Samsung Electronics from South Korea. What do these companies have in common? They are all companies that specialize in electrical or electronic products...
Can light really cure cancer?
In this blog post, we will explore the principles and possibilities of photodynamic therapy, which selectively destroys cancer cells. As of 2025, cancer is the leading cause of death in South Korea. Despite ongoing attempts to overcome cancer through various methods, such as anticancer drugs and radiation therapy, cancer has not yet been completely conquered and remains a major concern for...
Can big data and the cloud solve the problems of IoT?
In this blog post, we will look at how big data and cloud computing can solve problems such as security and data overload faced by IoT. In September 2013, at the 34th America’s Cup yacht race held in San Francisco, California, an unexpected turn of events took place. The Oracle USA team, which was trailing 1-8, won eight consecutive races in the final stages of the competition to win...
Why will flight control engineering become a core technology for future aircraft and transportation systems?
In this blog post, we will look at how flight control engineering improves aircraft stability and maneuverability, and what possibilities it opens up for future transportation and automation technologies. Take a sheet of A4 paper. If you fold this paper in half to make a paper airplane, will it fly well? You don’t need to try it to know the answer. It won’t fly. This is because...