Education
Degree could get you to Mars
AN OPPORTUNITY to work on the 2020 European Space Agency (ESA) / Roscosmos mission to Mars has taken an Aberystwyth University student a step closer to a career in the space industry.
Ariel Ladegaard from Bergen in Norway has just returned from the Atacama Desert in Chile where he has been taking part in an ESA field trial of a test rover, as scientists prepare to go in search of life on the red planet.
As an undergraduate student on the Space Science and Robotics degree programme at Aberystwyth, Ariel was invited by computer science lecturer Dr Helen Miles to look at how images sent back from Mars could be corrected to reflect the planet’s true colours.
Dr Miles and fellow space scientist Dr Matt Gunn at Aberystwyth University have been working on PanCam, the mission’s panoramic camera system.
Tasked with capturing stereo and 3D images of the Martian terrain, work on PanCam is led by the Mullard Space Science Laboratory at University College London.
At Aberystwyth, Dr Gunn and his team have developed a hardware emulator for PanCam and a unique colour swatch inspired by the stained glass windows of medieval churches to ensure it accurately captures colours on the sun-blanched planet.
Images taken during the mission will be studied by geologists as they look for minerals that might indicate the presence of water and the building blocks of life.
For his final year undergraduate project in 2018, Ariel was set the challenge of developing a prototype software package that could compensate for imperfections in the mission’s camera, and the wear and tear of working in Mars’ hostile environment.
“Driving around on Mars is challenging and time-consuming, so you want to be certain that you’re going in the right direction. Images taken from a distance will be analysed to look for possible sites where the rover can use its ground penetrating radar and drill, so they need to be as accurate as possible.
“Once back on Earth the images will be processed by a radiometric correction pipeline which automatically adjusts them based on our knowledge of how the images were taken and how the camera responds to light in various conditions.”
Ariel’s undergraduate project focused on developing a proof of concept framework for the correction pipeline and drew on work done on the ground software for NASA’s James Webb Space Telescope.
Now a PhD student at Aberystwyth, Ariel is working on the next phase and developing the algorithms that go into correcting the images.
Ariel said: “Aberystwyth has been great. It is everything I could have hoped for from an education in terms of how quickly I have been able to get involved in something meaningful to me, a real project. My goal is to work in robotic space exploration, a niche industry that can be difficult to enter but Aberystwyth has certainly opened the door for me.”
Speaking of his work on ExoMars, Ariel added: “It has been very nice to see just how open people in the ExoMars community have been to new actors coming in with questions and their own ideas and views on things. At first, I was a bit overwhelmed by the mission itself as it has been going on for a long time. There’s quite a barrier to entry for new people in understanding just how everything fits together, not just on a technical level, but also on the social and political levels. The more I have delved into that, however, the more I’m confident I have something to offer to the project.”
As well as developing image processing software, Ariel has been involved with ExoFiT, ESA’s Airbus-led field trials using an ExoMars-like prototype rover in Spain and Chile.
Working near the Paranal Observatory high up in the Atacama Desert in February 2019, he was part of the team testing the mission’s procedures and approaches to gathering science.
It was also an opportunity to put the image processing pipeline to the test, with pictures sent back to the UK for correction.
Ariel added: “Aberystwyth’s involvement with ExoMars revolves around calibration of the mission’s camera system and correction of images – understanding how the cameras work and how we can process and interpret the images. It was good to be able to put some of the work we have been doing in Aber to the test in Chile and gather valuable test data.”
Before taking up his studies at Aberystwyth, Ariel was a student at the Norwegian Centre for Space-related Education near Andenes in northern Norway.
He worked for seven years in the television and film industry before returning to higher education as a mature student on the BSc Space Science and Robotics degree at Aberystwyth University’s Department of Computer Science.
Education
Respite care facilities at Pembrokeshire school approved
PLANS for a respite care facility at Haverfordwest’s Portfield special school have been approved.
An application to Pembrokeshire County Council by Morgan Sindall Group, on behalf of Pembrokeshire County Council, sought permission for a three-bed respite unit for pupils aged between 16 and 19 years old.
Portfield School is an additional learning school for pupils aged three-19, and forms part of a broader network including Y Porth based at Ysgol y Preseli and Haverfordwest High VC School.
Portfield School is currently located in two buildings, one for primary school students, along with a secondary school building for key stages 3 to 4, and pupils aged 16-plus.
The proposed location of the respite care is where the existing lower school currently lies.
Demolition of the lower school was granted as part of a recently approved planning application for the wider site redevelopment, including a masterplan for the campus, the redevelopment of the new primary school building, refurbishment works to existing sixth form block and associated works.
A supporting statement by agent Asbri Planning said: “The proposed location of the respite care was marked out on the approved Site Masterplan as ‘proposed area for future development’. As Pembrokeshire County Council were unsure whether the funding would be available for the respite care, they decided not to include it within the scope of works for the main school application approved earlier this year. The funds have now become available which has allowed the application for a new respite care facility to be submitted to the Local Planning Authority.”
It added: “The respite care aims to conjure up a positive arrival experience for users by introducing an entrance courtyard, whilst enhancing links to nature where key vistas towards nature are considered. The users of the building will have full access to the communal areas and facilities.
“There will be no access for the general public, only the users of the building at that time. The unit will operate 24 hours a day all year round. Full-time care is to be provided and there will be staff available at all times for pupils.”
The application was conditionally approved by county planners.
Education
Stonehenge may have been built to unify the people of ancient Britain
THE RECENT discovery that one of Stonehenge’s stones originated in Scotland supports a theory that the stone circle was built as a monument to unite Britain’s early farmers nearly 5,000 years ago, according to a new study by researchers at UCL and Aberystwyth University.
In a research article published in the journal Archaeology International, academics analyse the significance of the recent discovery of the Scottish origin of the six-tonne Altar Stone, which confirmed that all of the stones that make up Stonehenge were brought to Salisbury Plain from many miles away.
In their new paper, the researchers say that Stonehenge’s long-distance links add weight to the theory that the Neolithic monument may have had some unifying purpose in ancient Britain.
Lead author Professor Mike Parker Pearson from the UCL Institute of Archaeology said: “The fact that all of its stones originated from distant regions, making it unique among over 900 stone circles in Britain, suggests that the stone circle may have had a political as well as a religious purpose – as a monument of unification for the peoples of Britain, celebrating their eternal links with their ancestors and the cosmos.”
Co-author Professor Richard Bevins of Aberystwyth University, said: “It’s really gratifying that our geological investigations can contribute to the archaeological research and the unfolding story as our knowledge has been improving so dramatically in just the last few years.
“Our research is like forensic science. We are a small team of earth scientists, each bringing their own area of expertise; it is this combination of skills that has allowed us to identify the sources of the bluestones, and now the Altar Stone.”
The study has been published (on 20 December) the day before the winter solstice, when the setting sun dips below the horizon over the middle of the Altar Stone and between the two largest upright stones (one of which is now fallen). During this winter period, Neolithic people feasted close to Stonehenge at the great village of Durrington Walls, and the midwinter solstice was probably central to these events.
Stonehenge is famous for these solar alignments on the solstice and even today attracts large crowds to the site on the shortest and longest days of the year. In addition, it was also the largest burial ground of its age. Some archaeologists think it might have been a religious temple, an ancient observatory and a solar calendar, and this new research adds a political dimension.
Professor Parker Pearson, a Professor of British Later Prehistory, added: “We’ve known for a while that people came from many different parts of Britain with their pigs and cattle to feast at Durrington Walls, and nearly half the people buried at Stonehenge had lived somewhere other than Salisbury Plain.
“The similarities in architecture and material culture between the Stonehenge area and northern Scotland now make more sense. It’s helped to solve the puzzle of why these distant places had more in common than we might have once thought.”
Stonehenge’s 43 ‘bluestones’ were brought from the Preseli Hills in west Wales some 140 miles away, while the larger ‘Sarsen’ stones were hauled from their sources at least 15 miles away to the north and east of the stone circle.
Transporting these massive monoliths was an extraordinary feat. Although the wheel had been invented, it had not yet reached Britain so moving these massive stones must have required the efforts of hundreds if not thousands of people.
The researchers point to how Stonehenge’s horizontal Altar Stone is similar in size and placement to the large, horizontal stones of the stone circles of northeast Scotland, where the Altar Stone originated.
These ‘recumbent stone circles’ are found only in that part of Scotland and not in the rest of Britain, so there may have been close ties between the two regions. Megalithic stones had ancestral significance, binding people to place and origins. The Altar Stone may have been brought as a gift from the people of northern Scotland to represent some form of alliance or collaboration.
It is difficult to pin down a precise date when the Scottish Altar Stone was brought to Stonehenge, but it probably arrived around 2500 BCE around the time that Stonehenge was remodelled from its original form.
This is the timeframe when the Neolithic builders erected the large sarsen stones forming an outer circle and the inner horseshoe of trilithons – paired upright stones connected by horizontal ‘lintels’ – that is present today. The Altar Stone lies at the foot of the largest trilithon, which frames the midwinter solstice sunset to the southwest. This was the second stage of construction at Stonehenge, long after the first stage (around 3000 BCE) when it is thought the bluestones from Wales were erected.
This second iteration of Stonehenge was built at a time of increasing contact between the people of Britain and arrivals from Europe, mainly from what are today the Netherlands and Germany. The researchers suggest that this period of contact may have been what spurred this second-stage rebuilding, and the monument was a reaction to these newcomers meant to unite indigenous Britons.
The new arrivals brought with them knowledge of metalworking and the wheel and, over the next four hundred years, their descendants – known as the Beaker people on account of the distinctive pots they buried with their dead – gradually replaced the population of indigenous Britons, and people with this European ancestry became the dominant population across the island.
The geological research was supported by the Leverhulme Trust.
Ends
Picture: The Altar Stone, seen here underneath two bigger Sarsen stones. Credit: Professor Nick Pearce, Aberystwyth University.
Education
Tutor banned after Pembrokeshire College drug incident
A PEMBROKESHIRE COLLEGE tutor has been struck off after admitting to police that he had cocaine on college premises but later denying the offence to authorities.
The Fitness to Practise Committee of the Education Workforce Council (EWC) found Phillip Lewis, a former tutor at Pembrokeshire College, guilty of unacceptable professional conduct. The committee said Lewis provided inconsistent explanations about how he came into possession of the Class A drug.
Lewis accepted a police caution in January 2023, which is considered a full admission of the offence. Despite this, he later challenged the allegations, raising concerns about the police’s handling of the matter.
Maxine Thomas, the safeguarding lead at Pembrokeshire College, told the committee that CCTV footage from November 23, 2022, captured a packet of cocaine left on a counter shortly after Mr Lewis had been in the area. The footage also showed Lewis retracing his steps as if searching for something.
The committee reported that Lewis gave conflicting accounts of the incident, including differing accounts of where and when he claimed to have found the packet. His explanations did not match the evidence from the CCTV footage.
“He provided inconsistent details about the circumstances in which he came to possess the packet, none of which aligned with the CCTV evidence,” the committee’s report stated.
Lewis claimed he had discovered the packet in a corridor but lost it shortly afterward. The panel, however, concluded that he should have reported the find immediately if his account were truthful.
“The committee concluded that Mr Lewis brought the packet onto college premises himself and did not hand it in because of its illegal nature,” the panel’s findings read.
The panel deemed that possessing cocaine on college grounds and accepting a police caution constituted unacceptable professional conduct. While no direct harm to students was noted, the panel highlighted the significant risk posed by such actions during working hours.
In deciding to remove Lewis from the professional register, the committee acknowledged his prior good record and his participation in the EWC process. However, these factors were outweighed by aggravating considerations, including his attempts to cover up the incident, providing contradictory accounts, and failing to demonstrate insight or remorse.
Lewis will be eligible to apply for re-registration in two years.
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