Categories
Science

One step closer to the Big Bang

Successful first test for inflatable telescope

By Heather Allen

Floating free: the inflatable antenna at an altitude of 20 kilometres. (Image: Sent into Space)

The secrets of the universe’s origin came one step closer earlier this month with the successful first test of a new inflatable radio antenna.

Niels Vertegaal, a PhD candidate from Eindhoven University of Technology (TU/e) is developing the antenna to help him realise his goal of examining the origins of the universe. The telescope will operate from the far side of the moon, free from earthly interference, which will enable it to detect these signals. The Big Bang theory sets the origins of the universe at around 13.8 billion years ago, within the scope of the antenna, which can capture faint, 14 billion-year-old signals in space.

The experiment was conducted in Sheffield, England, where Mr Vertegaal enlisted the help of the company Sent into Space, who specialise in executing and supervising this type of experiment. On 6th December, the weather conditions were favourable to allow the prototype inflatable radio telescope and weather balloon to climb into the stratosphere to an altitude of 30 kilometres.  Once the weather balloon reached 20 kilometres, the antenna started to unfold. At 30 kilometers, with the air getting thinner and thinner, the balloon started to bloat, due to the pressure difference. Eventually, according to plan, the balloon tore, and a parachute then brought the equipment safely back to the ground.

During the experiment, the antenna did unfold completely, but later than Mr Vertegaal had expected. However, the antenna was operational for long enough for him to run enough measurements to determine whether the antenna was functioning properly.

Following the test, Mr Vertegaal said: “I still need to analyse the data, but I already saw that the antenna does work. Either way, I’m happy with how everything went.”

So why an inflatable antenna? It’s all down to cost, Mr Vertegaal explains: “Because every gram that goes into space is very costly. So the question is how you can make an antenna that’s large in space, but very small and light when it’s launched. In a vacuum you only need a tiny bit of air to inflate something.”

When launched, the antenna is contained in a small (ten centimetre) cube. Inside is a paper-thin film, which measures one metre square when unfolded. The film is covered by a two-micrometre thick conductive layer of copper, which functions as a radio receiver. The process of unfolding the antenna is conducted by blowing compressed air into its arms, followed by a small dose of CO₂. Prior to the experiment, Mr Vertegaal released a video of laboratory tests, where the antenna resembles a balloon being inflated, slowly revealing its final shape.

A consortium, which includes Radboud University Nijmegen and TU/e, is working on submitting a proposal to the European Space Agency. The goal is to use an inflatable antenna as a radio telescope on the far side of the moon.

“I really hope that space exploration missions to the moon will end up embracing this idea,” Mr Vertegaal said. “With an antenna that can capture ultralow frequencies behind the moon, free from interference from earth, we expect to gather information on the origins of the universe.”

Source https://www.tue.nl/en/news-and-events/news-overview/08-12-2023-research-into-the-big-bang-an-inflatable-antenna-in-space

Categories
Psychology

Trust me, you’re on your own

by Heather Allen

Group think: the company we are in is an important driver of ethical behaviour. (Image: Adobe Stock)

The urge to deceive others is a natural human trait, albeit not a desirable one. It is widely believed that a person’s trustworthiness, or lack of it, is down to their individual character rather than the situation they are in. Indeed, research on unethical behaviour has tended to focus on the person exhibiting the behaviour, rather than the target of that behaviour. However, new research from the University of British Columbia (UBC) Sauder School of Business has turned that view on its head. According to the research, people are more likely to act deceptively towards a group rather than an individual – the situation itself directly affects behaviour.

Researchers cite the example of a job interview, where, it was discovered, a candidate is more likely to exaggerate their qualifications and experience when facing a panel than they would in a one-to-one interview.

“We found that individuals act more unethically toward groups than individual targets – and how closely connected they are to the group comes into play,” Dr Daniel Skarlicki, a professor at the UBC Sauder School of Business, said. “It’s almost as though my responsibility to the other side is diluted, because there are four of them. You don’t get the same sense of a personal connection that you get with one person. And when that connection goes away, deception is more likely.”

Groups tend to be perceived as competitive, aggressive and negative, and less like a ‘real’ entity, Dr Skarlicki said. This means that people tend to see groups as less personal, and therefore not as deserving of moral treatment.

Researchers coined the term ‘The Plurality Effect’ to describe the phenomenon, which was observed across several experiments in the study.  In one scenario, participants acting as advisors behaved dishonestly when interacting with a group compared to an individual. Another experiment, which focused on mock job interviews, revealed an increased likelihood of deceptive behaviour when facing a panel rather than an individual interviewer.  

A person’s connection to the group can also make a difference. People show greater moral concern toward individuals in their close circles (the in-group), which can include friends, family members, colleagues, and people whose stories they relate to.

“There is strong evidence that you will be more deceptive to the out-group versus the in-group, because you feel relatively more responsibility toward the in-group and you like them more,” Dr Skarlicki said. “If we go back in time, the out-group is whoever you’re competing with for food. It’s evolutionary.”

The findings could have a wide application, from job interviews and customer interactions to international negotiations, Dr Skarlicki said. Instead of group interviews, employers might choose to have a series of one-on-one meetings, which could also be a winning strategy in political negotiations. In addition, people can reduce the risk of deception by trying to boost their moral concern about the other party.

The study, entitled ‘The Plurality Effect: People behave more unethically toward group than individual targets’, builds on research about moral decision-making and social identity theory, and was co-authored with Hsuan-Che Huang from UBC Sauder, Dr Ruodan Shao from York University, Dr Kristina Diekmann from University of Utah, and Dr Ann Tenbrunsel from the University of Notre Dame.

Source: University of British Columbia. https://news.ubc.ca/2023/12/07/people-more-likely-to-behave-unethically-toward-groups-than-individuals/

Research abstract available at: https://journals.aom.org/doi/abs/10.5465/AMPROC.2023.349bp