Author: The Conversation

Scholars disagree about whether the formerly whites-only neighbourhoods of Johannesburg, South Africa’s largest and most economically important city, have become substantially desegregated since the end of apartheid in 1994. Some argue that racial residential segregation has declined only slightly, while others argue that it is substantial. My recent research shows that the extent of racial desegregation is much more substantial than is commonly accepted. This research is based on population census data for the years 1996, 2001 and 2011 and is a result of my long-term scholarly interest in the changing nature and extent of racial inequality in Johannesburg. The…

The essence of stand-up comedy is that you have a comedian performing to a live audience with the goal of entertaining through eliciting humour. Comedians hold social, cultural, and political phenomena up to ridicule. Jokes can instigate re-evaluations, reversals and replacements of the status quo – or dominant beliefs of the day. As an art form based on abuse and amusement, comedy uses potentially offensive material. One would expect the audience to be either delighted or infuriated. But stand-up comedy creates a space where a kind of agreement is reached, which renders most offensive gags inoffensive. This happens through elements…

For years, self-driving car technology has remained tantalizingly just beyond the horizon. Bold predictions notwithstanding, fully automated vehicles still haven’t appeared in showrooms. But the technology appears poised for a leap forward in 2022. Companies including Mercedes-Benz, BMW and Honda are bringing so-called Level 3 AVs to market that will let drivers take their hands off the wheel under specific conditions, and virtually every major auto manufacturer is testing self-driving systems. Automated vehicles hold tremendous promise. Cars that handle most or all of the driving tasks could be safer than human drivers, operate more efficiently and open up new opportunities…

Since its launch on Christmas day, astronomers have eagerly followed the complex deployment and unfurling of NASA’s James Webb Space Telescope – the largest to ever take to the skies. Right around the time this article is published, it’s expected Webb will have reached a place called the Earth-Sun “second Lagrange point”, or “L2”. This is a point in space about 1.5 million kilometres away from Earth (in the opposite direction from the Sun) where the gravity from both the Sun and Earth help to keep an orbiting satellite balanced in motion. Now the astronomical community – including my team…

The two most successful coronavirus vaccines developed in the U.S. – the Pfizer and Moderna vaccines – are both mRNA vaccines. The idea of using genetic material to produce an immune response has opened up a world of research and potential medical uses far out of reach of traditional vaccines. Deborah Fuller is a microbiologist at the University of Washington who has been studying genetic vaccines for more than 20 years. We spoke to her about the future of mRNA vaccines for The Conversation Weekly podcast. Below are excerpts from that conversation which have been edited for length and clarity.…

South African space science had a big day on 13 January 2022. The Cape Peninsula University of Technology, based in Cape Town, launched its third satellite mission into space from the Cape Canaveral rocket launch site in Florida in the US. The nanosatellite constellation – consisting of three satellites – is called MDASat (Marine Domain Awareness). A nanosatellite is smaller than standard satellites, weighing between 1kg and 10kg; it’s an affordable, functional option. The mean mass of each of our satellites is 2.1kg. MDASat is designed to collect data that will enhance the security and protection of South African marine…

Microsoft announced on Jan. 18, 2022, its intention to purchase video game giant Activision Blizzard. The company, publisher of top-selling video games Call of Duty, World of Warcraft and Candy Crush, has been the subject of a series of sexual discrimination and harassment complaints. A day before Microsoft’s announcement, Activision Blizzard announced that it has fired “nearly 40 employees” since July following an investigation into hundreds of reports from employees of misconduct. California sued Activision Blizzard in July 2021, alleging a “pervasive ‘frat boy’ culture” at the company and discrimination against women in pay and promotion. The suit prompted a…

Most research into the ethics of Artificial Intelligence (AI) concerns its use for weaponry, transport or profiling. Although the dangers presented by an autonomous, racist tank cannot be understated, there is another aspect to all this. What about our responsibilities to the AIs we create? Massively-multiplayer online role-playing games (such as World of Warcraft) are pocket realities populated chiefly by non-player characters. At the moment, these characters are not particularly smart, but give it 50 years and they will be. Sorry? 50 years won’t be enough? Take 500. Take 5,000,000. We have the rest of eternity to achieve this. You…

People interact with machines in countless ways every day. In some cases, they actively control a device, like driving a car or using an app on a smartphone. Sometimes people passively interact with a device, like being imaged by an MRI machine. And sometimes they interact with machines without consent or even knowing about the interaction, like being scanned by a law enforcement facial recognition system. Human-Machine Interaction (HMI) is an umbrella term that describes the ways people interact with machines. HMI is a key aspect of researching, designing and building new technologies, and also studying how people use and…

Every month, Facebook attracts 2.89 billion active users. Every minute there are hundreds of thousands of comments and status updates. Each could be discussing anything, including extremist views, or the sale of endangered wildlife across continents. Social media platforms have enabled wildlife traders to connect as never before. Some operate legally, within the boundaries of international laws. Others are less scrupulous. Illegal traders use private chats and groups to bypass middlemen and exchange information on how to evade law enforcement. They use the ecosystem of public and private channels on social media platforms to sell wildlife as pets or luxury…