In this blog post, we’ll examine the principles behind network overload that occurs when users suddenly flock to a specific area, and how load balancing technology works to resolve this issue.   You’ve likely been to places where huge crowds gather in specific areas—such as on days when university entrance exams are held, during concerts, or around Gangnam Station when English language...

In this blog post, we’ll examine the principles of radar detection, the radar-evasion technologies used by stealth aircraft, radar cross-section (RCS), and the principles behind aircraft geometry and internal weapon bays, and explore the significance of stealth technology in modern air combat.   How Do Stealth Aircraft Evade Radar Detection? For some time, South Korea was worried and fearful...

In this blog post, we’ll examine the causes of recurring highway traffic congestion during holidays and the shock wave theory, and explore the principles and operation of ramp metering, which is used to alleviate this congestion.   The two biggest holidays in South Korea are Seollal (Lunar New Year) and Chuseok (Harvest Festival). Whenever a holiday rolls around, we get excited about three...

In this blog post, I’ll talk about how someone worn out by daily life can briefly escape from it by experiencing the music, the people, and the free-spirited atmosphere at a rock festival.   Perhaps because of the short monsoon season, that summer was particularly hot. In late July, after the monsoon ended early, I was working on a summer session project in Building 301. The summer session...

In this blog post, I will examine concerns regarding environmental pollution, human health, the local ecosystem, and economic impacts surrounding the Lynas Advanced Materials Plant in Malaysia, and consider whether the plant should be shut down in light of these issues.   The Malaysian government approved the establishment of the Lynas Advanced Materials Plant, and construction began in 2008...

In this blog post, we’ll explore the principles, types, preoperative examinations, postoperative care, and pros and cons of intraocular lens implantation (ICL)—an alternative to consider when LASIK or LASEK surgery isn’t feasible.   Having worn glasses since elementary school, I understand the inconvenience of glasses better than anyone. My vision was so poor that I could barely distinguish...

In this blog post, I’d like to share my firsthand experiences from several visits to Las Vegas to discuss how the city was built and is operated, and how I came to discover the face of capitalism—and its hidden side—there.   As I approach graduation, I find myself reminiscing about happier times in the past. I think the happiest times of my life were when I was just having fun in the U.S...

In this blog post, we’ll compare the process of human speech and listening with the transmission and reception process of a radio to explore the principle by which a radio carries music signals on high-frequency radio waves and converts them back into sound that humans can hear.   SBS Power FM at 107.7 MHz, MBC FM4U at 91.9 MHz, KBS Classic FM at 93.1 MHz… These are the frequencies we...

In this blog post, we’ll explore the principles behind how radios and TVs select and receive the desired broadcast signal from among various frequencies, the basic concepts of filtering, and how a simple low-pass filter works.   Today, many people watch TV or listen to the radio. To receive a broadcast, you must select and receive radio waves within a specific frequency band transmitted by a...

In this blog post, we’ll examine the principles behind yogurt cup lids and water-repellent car coatings, and explore how superhydrophobic materials inspired by the nanostructure of lotus leaves are being developed and utilized.   I often enjoy eating yogurt in a cup. The real pleasure of eating yogurt this way was licking the yogurt stuck to the lid with my tongue. It may seem a bit silly to...