Posts

What Is CBDC? A Clear Comparison With Cryptocurrency

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Interest in digital currencies is rapidly growing worldwide. Among them, Central Bank Digital Currencies (CBDCs) are attracting the most attention from governments and financial institutions. In this post, we’ll explain what a CBDC is and how it differs fundamentally from cryptocurrencies like Bitcoin.     What Is CBDC? CBDC stands for Central Bank Digital Currency. It is a digital version of legal tender issued by a country's central bank. Like physical cash (banknotes and coins), CBDC is backed by the government, but it exists in digital form, often operating on blockchain or centralized databases. For instance, a CBDC issued by the Bank of Korea would carry the same legal value as Korean won and can be used for sending, receiving, and making payments via digital wallets. CBDC vs. Cryptocurrency: What's the Difference? Many people confuse CBDCs with cryptocurrencies. However, they are completely different in philosophy, structure, and function. ...
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How Is Photosensitivity Diagnosed? Testing Methods and How to Find the Right Clinic

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If your skin becomes itchy or red after just a few minutes in the sun, it might not be simple sensitivity. It could be photosensitivity —an abnormal reaction to UV rays. When left unchecked, this condition can greatly affect your daily life. In this blog, we explain how photosensitivity is diagnosed and what to consider when choosing a dermatology clinic .     Common Symptoms That May Suggest Photosensitivity Unlike basic sun irritation, photosensitivity usually appears suddenly and can recur regularly. Here are the telltale signs: Itching, redness, or blisters within hours of sun exposure Burning or stinging sensation on exposed areas Symptoms appear only on sun-exposed skin (face, arms, neck, etc.) Worsening reactions after taking certain medications If these symptoms occur repeatedly, you should consider being tested for photosensitivity rather than assuming it’s just mild irritation. How Do Doctors Diagnose Photosensitivity? Photo...
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Sudden Sun Allergy After 50? Here's Why and What to Do

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You never had skin issues before, but now, sunlight exposure suddenly causes redness, itching, and stinging. If this started happening after the age of 50, it might not just be a sunburn—you're likely experiencing photosensitivity or a sun allergy . Sun allergies that emerge after 50 are often triggered by a combination of factors such as immune system shifts, medications, skincare ingredients, or hormonal changes. In this post, we’ll dive into the causes, symptoms, and effective prevention strategies for managing sun allergies in your 50s and beyond.     Main Causes of Sun Allergy After 50 Weakened immune response: As we age, immune regulation declines, making skin overreact to external stimuli like UV rays. Medications: Drugs for hypertension, diabetes, or cholesterol can cause photosensitive reactions when combined with sunlight. Thinner skin barrier: Hormonal shifts during menopause or andropause reduce skin’s natural defenses. Skincare ...
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All About Vaseline: The Power of the Legendary Moisturizer

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If you had to choose just one product for dry seasons or irritated skin, many people would instantly pick Vaseline . For over 150 years, Vaseline has been loved worldwide not just as a moisturizer, but also as a versatile item with various uses and DIY potential. In this article, we'll explore its ingredients, benefits, usage tips, precautions, and creative applications.     What Is Vaseline? Vaseline is a brand name for a product made of 100% refined petroleum jelly (Petrolatum) . Derived from crude oil, it's a semi-solid substance that undergoes multiple purification processes to make it safe for skin. It forms a thin protective layer over the skin, preventing moisture loss and shielding it from external irritants. How It Differs from Regular Moisturizers The key difference between Vaseline and regular moisturizers lies in their moisturizing mechanisms. Vaseline is an occlusive agent—it works like a lid, locking in moisture by sealing the skin. In c...
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EGF Skincare Products – Do They Really Regenerate Skin?

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In recent years, EGF (Epidermal Growth Factor) has gained popularity in skincare due to growing interest in skin regeneration and anti-aging. While advertisements often tout EGF as a miracle ingredient, does it actually work? In this post, we’ll explore what EGF is, how it works, its clinical efficacy, and key points to consider when choosing EGF-containing skincare products.     What Is EGF? EGF stands for Epidermal Growth Factor , a naturally occurring protein in the body that promotes cell growth, differentiation, and regeneration . Initially used in medical fields such as burn treatment and post-surgery recovery, its ability to promote skin healing has led to its adoption in the cosmetic industry. How Does EGF Work on Skin? When applied to the skin, EGF sends signals to epidermal cells to accelerate their division and renewal. It enhances collagen synthesis , improves skin elasticity , reduces fine lines and wrinkles , and speeds up the healing proc...
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How to Safely Remove a Rusted and Damaged Screw from a PCB

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When repairing electronics or circuit boards (PCBs), it's common to encounter screws that are rusted or have damaged heads. This is especially true for devices that have aged or were used in humid environments. If you try to remove such screws forcefully, you might end up damaging the board itself—leading to higher repair costs or irreversible failure. In this post, we'll break down how to safely remove rusted and stripped screws from PCBs . Whether you're a beginner or a seasoned technician, you'll find detailed step-by-step instructions, tool recommendations, and critical safety tips to guide you through the process.     1. Assess the Screw Condition First, check the state of the screw. Determine which of the following situations applies: Partially stripped head : Cross or slot head is rounded but still visible Completely damaged head : Head is broken or worn flat Rust-seized : The screw thread is corroded and stuck in place Proper as...
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Find the Center of a Circle Using Just a Square Ruler – The Easiest Method

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In woodworking, it's often necessary to find the exact center of a circular piece. Whether you're drilling a hole for a handle, mounting a table leg, or doing circular engraving, an inaccurate center can throw off the entire project.     The Simplest Method: All You Need Is a Square Ruler and a Pencil You don't need any fancy tools. With just a standard carpenter’s square and a pencil, you can accurately find the center of any round wooden piece. This method is simple and effective—perfect for beginners and weekend DIYers. Step-by-Step Guide to Finding the Center Place the round wood piece flat on a level surface. Use the square ruler to draw a straight line across the piece, edge to edge. This should act as a diameter line. Rotate the piece about 90 degrees and draw another straight line. The point where the two lines intersect is the exact center.     Tips for Accuracy Instead of a pencil, use a scribe or aw...
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