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sanzida aktar
Jul 07, 2022
In Welcome to the Tech Forum
Kobe Bryant, Liu Zhen, Shimura Ken, Miura Haruma, Huang Hongsheng, and Yuko Takeuchi have passed away one after another. Recently, there have been many regrets on Taiwanese campuses. Even the Oxford English Dictionary said that they could not choose a vocabulary to summarize the year. What happened in 2020? It is a question that many people cry out in their hearts, and it also symbolizes the beginning of an era. As of the writing date, nearly 1.43 million people worldwide have died from "COVID-19" (2019 novel coronavirus disease, hereinafter remove background from image referred to as Wuhan pneumonia). We are officially entering a world where there is a plethora of death material mixed with life, mourning together in a digital virtual space in horror. But is 2020 really that bad? I think that's because the "mediation of death" has dramatically changed the nature and amount of mourning this year, framing our fear and loneliness in 2020. 【Photos】Can't be covered in one word: Which words of the year did Oxford Dictionaries choose to look back on 2020? A Brief History of Death in the Media Death has entered the public domain, from crime stories to horror games. From traditional news to social media, from the sudden death of a celebrity to the disappearance of a friend, and death is portrayed in many more mediums (Hanusch, 2010; Zelizer, 2010) . Philippe Ariès (1974) found in historical data that in Western civilization, from the 19th century onwards, as the occurrence of death was gradually moved from the home to the hospital, people increasingly lacked personal, first-hand experience of death. What's more, after the emergence of mass media, whether it is print communication or digital communication, the death incidents we encounter through the media are far greater than the death experience in our personal life. Death in the media always guides how we view death, face it, manage it, and indirectly influence the various social relationships that are built and maintained around it. The news media is the largest mechanism for conveying death symbols in modern society, and various forms of death have been extensively discussed:
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sanzida aktar
Jul 07, 2022
In Welcome to the Tech Forum
Written by Amy Lang and Translated by Lim Ji-gyun By turning up their scales, sharks can suppress eddies in the wake around them, reducing drag while swimming. The mako shark swims very fast in the sea, and some studies estimate that its swimming speed can be as high as 100 kilometers per hour, which is called the cheetah in the sea. Being able to swim so fast doesn't just depend on strong muscles and streamlined looks. All sharks are equipped with enamel-covered scales that resemble many small translucent teeth called dermatodonts. Fast-swimming sharks, such as the mako, have small skin teeth, about 0.2 cm (see Figure 1). These tough scales not only play a remove background from image protective role, but also play an important role in the hydrodynamics of the shark's swimming. friction and pressure There are two main types of resistance that sharks experience when swimming: the first is the resistance from the viscosity of seawater. From the shark's point of view, the water around it will stick to the surface of its scales, which is the inefficiency in fluid mechanics. Slip condition (no-slip condition). This phenomenon causes a layer of seawater around the shark body (that is, the boundary layer) to be affected by viscosity, and the flow rate is different from that of the overall seawater. Outside the boundary layer, the seawater flow velocity can be regarded as a constant value. 2dd43b093b7b594c021aea4a549775ae Image credit: Physics Today Figure 1. Dermal teeth on the body surface of the mako shark. The red area indicates the part where the denticles are erected or flared. The dentition is 30 degrees on the fins and can reach 50 degrees on the flanks. Electron microscopy captures different morphologies of the denticles on the flank, including: flat (panel a), erect (the background denticle is not erect, panel b), and the dentition is aligned in the dire
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