정보 25시 티스토리

Did you know that the Wi-Fi signals we use daily at home or in cafes can measure breathing and heartbeats of people behind walls? 'Wi-Fi sensing,' a recently highlighted technology, analyzes the subtle changes in radio waves reflected off a person's body. Without separate cameras or wearable devices, AI interprets the reflected radio wave patterns to identify a person's location, posture, respiratory rate, and heart rate in real-time. While it eliminates privacy concerns associated with cameras, it's being utilized as a cutting-edge technology to detect falls in elderly individuals living alone or rescue people in collapsed structures. Essentially, the radio waves that used to connect us to wireless internet have now evolved into 'see-through sensors' that penetrate walls.

If you keep catching colds or the flu virus despite washing your hands thoroughly, you're likely missing 'this spot' in your home. While people usually clean toilet seats or doorknobs, the places with the highest actual virus and bacteria contamination are the refrigerator door handle and the remote control. This is because the refrigerator door is the first thing everyone in the family grabs after returning home and before washing their hands, and it's easy to neglect cleaning the remote control. Especially, cold viruses can survive for over 24 hours on hard plastic surfaces. Simply wiping the refrigerator handle and remote control lightly once a day with an alcohol swab or disinfectant can drastically reduce the probability of virus transmission within your home. How about giving it a wipe this evening?

Many people wipe their smartphone screens with disinfectant alcohol or wet wipes for hygiene, as they touch their phones daily. However, this is a critical habit that can damage your screen. Smartphone displays have an 'Oleophobic Coating' that prevents fingerprints and oil stains. The chemical components in alcohol or cleaning agents chemically dissolve this coating, quickly stripping it away. Once the coating is damaged, fingerprints will stick much more severely, the touch feel will become stiff, and it will be more vulnerable to contamination. Smartphone manufacturers also prohibit direct spraying of alcohol. The best way to safely clean your screen is to gently wipe it with a microfiber cloth without any chemical detergents. If disinfection is necessary, using a UV sterilizer is a great tip to protect your smartphone's lifespan.

🌏 A Roundup of Unique Global Cultures & Trends 🗾 Asia • Japan – Otaku Culture: A massive subculture centered around anime, games, and cosplay. 'Maid Cafes' and 'Cat Cafes' also originated in Japan. • Japan – Capsule Hotels: A trend in accommodation that efficiently utilizes minimal space. • South Korea – Red Light, Green Light Game (Squid Game): Became a worldwide sensation due to the drama. • South Korea – Chicken & Beer (Chimaek) Culture: Known internationally simply as 'Chimaek'. • China – Singles' Day (11.11): Evolved from 'Guanggun Festival' (光棍节), it's now the world's largest shopping festival. • Taiwan – Night Market Food Culture: 'Night Markets' across Taiwan are a paradise for street food. • Thailand – Songkran Festival: The world's largest water fight festival, celebrated by splashing water. • India – Holi Festival: A spring festival celebrated by throwing colored powder all over. • Indonesia – Gojek Culture: A lifestyle super-app for motorcycle hailing, delivery, and even finance. • Mongolia – Naadam Festival: Features wrestling, horse racing, archery, and more.

Unlike lithium batteries, which are core to electric vehicles and smartphones, Finland has recently created a massive energy storage system using common 'sand'. This 'sand battery' stores excess electricity generated from wind or solar power as thermal energy by heating sand in silos to over 500 degrees Celsius. Once heated, the sand retains its temperature for months with minimal heat loss, providing stable heating for tens of thousands of homes during cold winters. It's an amazing rediscovery of modern engineering, achieving eco-friendly energy storage using only ordinary sand, without rare earth elements or toxic chemicals.

The 'oiljang' (5-day market), commonly seen in traditional local markets. Why is it held every '5 days' instead of every 3 or 7 days? The secret lies in the 'travel distance' of the 'Bobusang' (traditional Korean peddlers) during the Joseon Dynasty. At that time, the distance a Bobusang could walk in a day while carrying their load was about 30-40 km (100 'li'). It took exactly 5 days to finish trading at one market, travel to the next, and set up shop again. The interval between market days across the country was set to 5 days to allow Bobusang to continuously trade while circulating nationwide. Looking back, the cycle of the 5-day markets we visit today was essentially a perfect distribution system created by the footsteps of Joseon Bobusang walking 100 li.

In the stock market, large, high-quality stocks with excellent performance and financial structure are called 'Blue Chips'. However, the origin of this term surprisingly comes from the gambling world. In 1920s American poker games, white, red, and blue chips were used, with the blue chip being the most valuable. It's said that a reporter for Dow Jones at the time saw stocks priced over $200 and likened them to 'the blue chips of poker,' which became the origin. Ironically, a term that signified the highest value in a risky gambling game has become synonymous with the safest and most reliable stocks in the stock market.

Ever been stuck trying to unlock your car from far away in a parking lot, only to find your key fob isn't working? Surprisingly, holding your car key against your head can dramatically extend its range. It sounds bizarre, but it's scientifically proven. Your head, being full of moisture, acts like a 'fluid antenna,' amplifying the signal. The weak signal from your key fob interacts with the water in your head, spreading out in all directions and potentially doubling the reception range. So, next time you need to find your car or unlock it from a distance, try holding the key to your jaw or temple and pressing the button.

⭐️ Japan's Popular Tourist Spots Ranking 1st Place: Tokyo • City: Shibuya Scramble Crossing, Shinjuku Gyoen, Senso-ji Temple (Asakusa), Tokyo Tower/Skytree, Harajuku. • Suburbs: Hakone Onsen, Enoden (Kamakura), Lake Kawaguchiko (Mt. Fuji). 2nd Place: Kyoto • City: Kiyomizu-dera Temple, Fushimi Inari Shrine (Red Torii Gates), Arashiyama Bamboo Grove. • Suburbs: Nara Park (Deer), Kobe. 3rd Place: Fukuoka • City: Canal City Hakata, Tenjin, Fukuoka Tower, Ohori Park. • Suburbs: Dazaifu Tenmangu Shrine, Yufuin. 4th Place: Sapporo (Hokkaido) • City: Odori Park, Susukino. • Suburbs: Otaru Canal, Sapporo Beer Museum. • Seasons: Snow Festival (Winter), Lavender Fields (Summer).

③ "Real Pros Check This First👀" Just as important as game skill is understanding patterns! Instead of blindly attacking from the start, try observing your opponent's frequent actions 2-3 times. 🧠 Reading recurring patterns is much more powerful than a single judgment. 😎 Starting today, practice 'predicting' rather than just 'reacting'! 👇 What's the hardest game?