Covid-19: school facing the challenge of screening

An advertisement relating to Covid-19 displayed on the door of a primary school in Paris on November 29, 2021. RAFAEL YAGHOBZADEH / AP “The priority remains and will remain to preserve the education of our children” : the commitment made by the Prime Minister, Jean Castex, Monday evening December 6, at the end of a … Read more

Covid-19: in South Africa, the hunt for variants to the challenge of the fight against HIV

Paramedics from Tshwane (South Africa) move a man with Covid-19 to an isolation room in January 2021. PHILL MAGAKOE / AFP As South Africa has officially entered a fourth wave that is advancing at a rapid pace ” never seen “ According to the authorities, HIV-positive patients are canceling their follow-up consultations again, as they … Read more

In Kinshasa, city dwellers tackle the immense challenge of sanitation

Neither the storm nor the torrents of mud stop the garbage collectors in their frantic race behind the “rickshaws”. Carts that they empty as soon as they can, before filling them again. The Saio district is home to one of the many illegal dumps in Kinshasa, where all kinds of waste pile up. At the … Read more

In Ukraine, Zelensky’s challenge to escalate with Russia

Ukrainian President Volodymyr Zelensky in Kiev on December 1, 2021, the 30th anniversary of the Ukrainian independence referendum. EFREM LUKATSKY / AP As Ukraine faces, for the second time in less than six months, an escalation with Russia on its borders, President Volodymyr Zelensky intends to show that he is standing up. Wednesday 1is December, … Read more

“The challenge of the century, that of climate change, should help France move towards full employment”

Tribune. With the exception of a brief and recent presidential incise, full employment is the great forgotten of the presidential campaign, no candidate committing to his return, even in the long term, as if current unemployment were inevitable. insurmountable! The candidates are content at best to mention the creation of jobs, preferably green. It is … Read more

Simple silicon coating solves long-standing optical challenge

Journal Reference: M. Ossiander, Y.-W. Huang, W. T. Chen, Z. Wang, X. Yin, Y. A. Ibrahim, M. Schultze, F. Capasso. Slow light nanocoatings for ultrashort pulse compression. Nature Communications, 2021; 12 (1) DOI: 10.1038/s41467-021-26920-6 But any application of ultrashort laser pulses in the visible spectrum must overcome a fundamental difficulty — red light travels faster … Read more

Challenge McGregor with Facchinetti’s ‘Captain’s Song’

Lively exchange of tweets between Conor McGregor and the American wrestler Max Holloway, who in the end provokes the Irish champion by posting the video of Facchinetti’s “Captain’s Song”, with a clear reference to the story of the attack against the singer: “I will use it to get in the ring when we compete, so … Read more

The energy transition, a huge challenge for a South Africa heavily dependent on coal

The Rooiwal coal-fired power station near Pretoria on October 13, 2021. MICHELE SPATARI / AFP South African President Cyril Ramaphosa repeated it again in October: developed countries “Bear the greatest responsibility for climate change” and must, as such, “Offer significant financial support” to developing countries, in their efforts to reduce their greenhouse gas emissions. Less … Read more

China’s slowdown, a “considerable challenge” for the German economy

“Withdrawing from China is not an option, we have to work it out. “ The confession, unambiguously, was made by Nicola Leibinger-Kammüller, patron of the famous machine builder Trumpf, on October 26. The laser specialist, who presented its annual results, acknowledged its growing dependence on the Chinese market: the company achieved, in 2020-2021, 525 million … Read more