As soon as I mentioned a certain product, I received a push notification. Are we being eavesdropped? | Expo Daily

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I received a push notification as soon as I mentioned a certain product.

Are we being eavesdropped on?

Have you ever found that after you searched for a product or talked to your friends about a product you were interested in, you would receive related advertising push notifications in your app?

Many people wonder, are these apps learning about preferences through eavesdropping and pushing ads that are more in line with your requirements?

Eavesdropping is technically feasible, but using it for commercial purposes is actually not worth the cost. Many third-party advertising platforms are widely embedded in third-party applications, and many third-party applications are likely to embed the same advertising platform at the same time.

Such advertising platforms will further integrate the user usage habits collected from different channels at the back end, and then accurately profile the user, so as to accurately understand what the user likes, what is their approximate age, and what is their occupation. The advertising platform will label users in various ways, so as to push advertisements that match the user's behavior.

The content comes from the speech given by Zhou Yajin, a researcher at Zhejiang University, at the Gezhi Lundao.

Image source: pexels

310 million years ago,

The oldest forest ecosystem in North China discovered in Shanxi

Recently, scientific research by the Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences, determined that the 310 million-year-old fossil wood group in Yangquan is the oldest forest ecosystem in North my country.

In the research results published this time, "Research on Mineralized Plants Reveals the Complex Terrestrial Ecosystem of the North my country Block in the Late Carboniferous", researchers also found that the Cordaline plants of this period had grown to a height of 30 meters, correcting the erroneous perception of European and American paleobotanists that there were no tall trees in the Cathaysian flora during the deposition period of the Benxi Formation in the Late Carboniferous in my country.

In addition, researchers discovered for the first time the Li's kauri-type wood from the Late Carboniferous period in my country, and named two new fossil tree species, Damu and Paraiba, which were discovered for the first time in the world.

Based on the above findings, it can be seen that in the Late Carboniferous period (about 310 million years ago), the terrestrial ecosystem structure of the Cathaysia plant geographical region, which represents a warm and humid environment, was already very complex.

Image source: CCTV News

Does it mean sleeping only when these characteristics are met?

So what do I usually do...

The following characteristics are now considered to be a state of sleep (rather than anesthesia or coma):

1. Sleeping posture and location. Various animals have characteristic sleeping postures, and many animals also choose sleeping locations. However, when animals are anesthetized and in a coma, they do not have characteristic postures or selected locations.

2. Able to be awakened quickly. Although animals generally do not respond to external information when they are asleep, strong stimulation, including strong physical touch, strong sound, strong light, etc., can cause animals to quickly change from a sleeping state to a waking state. Animals that are anesthetized or in a coma cannot be awakened quickly.

3. Compensatory. Animals need a certain amount of sleep, so sleep is compensatory. If an animal loses sleep for some reason, it will sleep longer and deeper when it falls asleep again, and will be less likely to be awakened. However, anesthesia and coma are not what animals need, nor are they compensatory. Animals will not enter a state of anesthesia or coma just because they were not anesthetized or comatose in the past.

4. Controlled by the biological clock. Animals sleep at roughly fixed times throughout the day. For example, most animals sleep at night and are active during the day, while nocturnal animals sleep during the day and are active at night, but they all follow a regular pattern. Anesthesia and coma are not controlled by the biological clock and can occur at any time.

5. Sleep can be affected by hypnotic or arousal compounds. For example, melatonin and antihistamines can promote sleep, and caffeine can make people wakeful. Anesthesia and coma are not affected by these substances.

6. Sleep has characteristic neural electrical activity. The neural electrical activity during anesthesia and coma is complex and varied, and varies with the cause and condition.

Image source: veer

The content is compiled from China Science Popularization Expo Weibo, Gezhi Lundao Forum, CCTV News, and Science Academy

This article was first published in China Science Expo (kepubolan)

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