The drone industry (Part two) Strategies to mitigate those hazards may lie in two particular aspects. The first one is the laws and rules. By and large, stiff penalties and better information can keep rogue operators directly in check. Meanwhile, rather than wrap the drone industry in red tape, the security forces need to identify threats quickly. The best hope, already used by some airports, is three-dimensional radar, which, unlike standard airfield radar, can track a drone flying several kilometers away. It is very difficult to argue that the pleasure of flying a drone should outweigh the potential damage to society of their uncontrolled use. But step back and look at the bigger picture. The business of drones is among the most promising, as long as the bad guys are hobbled without undermining their many beneficial uses.

The drone industry (Part one) The past few years, on the cusp of a new round of technology explosion, have witnessed the rapid development of the drone industry. Gone are the days when these flying little gadgets made their appearances only on screens, often used as future human's weapons in some science fiction films. Every individual, nowadays, can buy one, and with a simple registration process, fly it into the sky. As with other dual-use technologies, drones can be either hovering saviors or menaces. On one hand, civilian drones are saviors that have helped people trapped by natural disasters, as they did last year when two young men were saved by a patrolling drone off a beach in New South Wales during their struggle against the violent surf. On the other hand, drones can also endanger life and cause disruption. For several times, they have been the ones to blame for forcing airports to shut and helping criminals to smuggle contraband across borders and into prisons. The bad often comes with the good. Not until the bad uses of drones are prevented can the technology be fully embraced for extensive commercial use.

Apple cut its sales estimate When Apple cut its estimate for the first-quarter sales in 2019 recently, market convulsed. Some analysts almost entirely blamed the economic slowdown in China for Apple's weaker than expected performance, but the real picture is perhaps far more complex. To start with, the slowdown of smartphone sales does not reflect lost of luster with consumers, quite the contrary. It is the result of saturation. For decades, customers have voted with their wallets to make the smartphone one of the greatest products in history. Making market more efficient, compensating for poor infrastructure in developing countries and boost growth, these magic gadgets have been so widely adopted that there is much less scope to sell them to first-time buyers. One more fundamental reason lies in the lengthening replacement cycles as new models offer only marginal improvements. Innovation frequently gets bogged down as extra bells and whistles no longer make a deep impression, as with other mature technologies from cars to washing machines. Many phones are used for longer than three years, often refurbished or as hand-me-downs. For all but the most obsessive gadget fans, the slowing treadmill of upgrades comes as a welcome relief. Yes, the financial markets have been hit seriously by Apple's shock warning. But step back and look at the bigger picture. Apple's pain is humanity's gain. The slowing sales is bad news for Apple, but for the rest of human society, it is a welcome sign that a transformative technology has become almost universal.

A presentation about Chinese Creation Myths Various versions of Chinese creation myths, though not related to religion, have been passed down through generations for thousands of years, among which the most famous one is the story of Pangu, who created the world and Nüwa, who made man. The Chinese myth starts with an egg called “chaos” with nothing inside but only a child named Pangu. Pangu had slept in the egg for 18,000 years. When he finally woke up, he found it was too dark and hot to endure inside the egg, so he broke the egg with an axe. After the egg was cracked, the lighter half rose and became the sky, and the heavier part descended and became the earth. Being afraid of the sky and the earth would gather again, Pangu continued lifting the sky. As he grew up, the taller he was, the more the distance between the sky and the earth was expanded. After another 18,000 years, Pangu found the sky and the earth could never get together again, when he had exhausted all his strength after the feat and immediately died. After his death, his left eye became the sun and his right eye became the moon. His last breath became the clouds and the winds. His bodies, the mountains. His blood, the rivers and seas. His teeth and bones, valuable minerals. His skin, the flowers and trees. That was how the world and all of life was created. You may wonder where the human came from. Well, in a special version of the myth, Pangu never showered so he had a bad case of fleas and those fleas became people. Apparently it was not a widely accepted version. Another version of the myth said it was Nuwa, a half-human half-snake mother goddess that created mankind instead of Pangu. Nuwa appeared out of nowhere in the new world created by Pangu. Walking among trees and flowers, she suddenly felt very lonely. So she began creating men from yellow clay, one at a time. After she had created hundreds of figures in this way, she got tired, so instead of hand-crafting each figure, she dipped a rope in clay and flicked it, so blobs of clay landed everywhere. Each of these blobs became a common person. It was said that the people who were crafted by Nuwa herself later became emperors and nobles. After hundreds of thousands of human beings were created, Nuwa divided them into men and women and grant them love so mankind can reproduce by themselves forever.