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February 2025

Richard Williams memorial award winner

Interview with Caitlin Maggs, winner of the 2024 Richard Williams Memorial Award

Discuss, Life at Lhasa /

The 2024 Richard Williams Memorial Award was proudly presented during the 37th annual Industrial Genotoxicology Group (IGG) meeting in Cambridge last December. This prestigious award, created to honour Dr Richard Williams, celebrates exceptional scientific contributions while supporting early-career researchers in the field of genotoxicology. Last year’s winner, Caitlin Maggs, is a second-year PhD student at […]

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Growing Lhasa: Welcoming Molecular Networks and Altamira

Growing Lhasa: Welcoming Molecular Networks and Altamira

Life at Lhasa, News /

We’re delighted to announce that Molecular Networks and Altamira (MN-AM) have joined our organisation! This marks an important step forward in our mission to advance chemical safety science and reduce the need for animal testing. Building on strong foundations This acquisition builds upon an established partnership – we’ve collaborated closely with both teams for years,

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Why prevalence shifts matter in machine learning

Why prevalence shifts matter in machine learning

Innovate /

In machine learning, the validation of binary classifiers, algorithms that categorise data into two classes, is essential. However, a frequently overlooked issue is prevalence shift, which occurs when two test datasets have different rates of positive instances. This phenomenon can distort performance metrics, leading to incorrect model evaluations. Understanding the problem Prevalence shift fundamentally affects

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