Recently, covid 19 outbreak spreads in Shanghai, China. There are more than 25,000 new asymptomatic domestic infections every day. China is implementing a dynamic zero-out policy. A leading respiratory expert said the key to COVID-19 prevention and c…
Gasoline prices at gas stations in the second week of March rose 97.6 won from the previous week to 1,861.6 won per liter. Although the average price for a week did not exceed 1,900 won, the price in the second half of the week in Seoul exceeded 2,00…
GaN-based chargers have been introduced to the market. These chargers provide a high amount of power for the device, while still maintaining a size that is reasonable, and even take up less space than the traditional chargers. Gallium Nitride, or GaN…
Boron carbide is also known as black Diamond. It has a molecular formula of B4C. The powder is typically grayish. It is one the three hardest materials known (the other two being diamond and cubic boronnitride), which are used in many industrial appl…