Everwide newsletter No.388

Bending strength, also known as flexural strength (Flexural Strength), refers to the maximum stress that an object can withstand before it is bent and broken (divided by the cross-sectional area), the unit can be Kg/cm2 or MPa. it is generally tested using ASTM D790 or ISO 178 specifications. Take the former, for example, the specimen is in the shape of a long strip, which is 3.2mm thick and 2.7mm wide, and 125mm long, and multiplies the three. Figure 1 shows the metal mold made in this size, and the process of infusion can be referred to in the biweekly report No.387. This test piece production method has advantages: 1. the mold cost is cheap and easy to assemble. 2. the resin is easy to inject into the leveling. 3. the defoaming is easy, and the test piece is relatively free of defects. However, the biggest disadvantage is that the exposed surface of the test piece is not flat and the thickness cannot be fixed, resulting in a change of strength. As shown in Figure 2, the surface will be concave if the resin is not filled enough, and the test piece will be scrapped in the end. Therefore, to prevent this problem, we will pour a little more resin to raise the cured material's surface and then use a sander to trim it to the proper thickness to get a flat surface (Figure 3~4).

—Author: Mr. Gen-Chang, Shi

Beach cleaning activities in the year's second half received an enthusiastic response from everyone. There were about 40 people, and 202 kilograms of trash were picked up. Pre-arrangement was essential, and colleagues helped a lot, such as field control, photo recording, Weighing classification, and environmental advocacy (Figure 1,2). After three years of cleanup, the coastline has become cleaner, so the pick-up sites have been expanded within the adoption area (Figure 3). After cleaning the beach, we visited Estuary Story House, once the official house of the headers of the estuary, Japan. The guide explained the characteristic architecture, and carving art, engraved his exclusive seal, which was then rubbed on rice paper, and looked at the finished product with a sense of accomplishment (Figures 4, 5). We will work together to contribute to the planet at next year's beach cleanup.

Nowadays, weathering testers are so progressive that they have different wavelengths of lamps to choose from, which not only control the intensity of light, the temperature of the instrument, and the humidity of the air but also simulate the condensation of dew and even the spraying of rain. The experimenter can set the light for a few hours and be in the dark for a few hours, as in a day and night cycle. In other words, the weathering tester can provide very stable experimental conditions. Relatively, the natural environment of different regions is very different, even in different seasons and years in the same place. From this point of view, how many hours the weathering tester works is equal to one year of outdoor exposure, and the problem cannot have a simple parameter.

Unforgettable October 1 because this day is the retirement of baseball player Pan Wu-Xiong. The night before the game started, fans lined up all night to grab Pan Wuxiong's limited merchandise. At noon that day, the number of people pouring into the Tainan baseball stadium once again set a record of breaking 10,000. Every fan was reluctant to leave and take photos in front of the main visual billboard to make precious memories. When Pan Wuxiong came on the court to strike at the game site, the fans sang the support song "Pan Wuxiong hit all bases at first base!" The shocking and loud singing made goosebumps fall all over the ground. As the game progressed into the second half of the eighth inning, fans craned their necks in anticipation that he would hit a home run to recoup a point behind, but a strikeout ended their hopes of winning and ended the game by one point. After the game, the highlight was Pan Wuxiong's retirement ceremony. As soon as the retirement film was played, fans shed tears of reluctance, but Pan Wuxiong's humor made fans cry and laugh. The Lion Team invited the third generation of former teammates to return, and the fans who experienced that period were red-eyed, which is the tears of the times! Finally, he was full of blessings, thanked the fans for their support in a round-the-field manner, and officially ended his 17-year playing career, which is the most touching game I have ever watched.

─Author: Mr. Hong-Wen, Chen