Warning: Undefined array key "preload-paths:/list-by-author/Rachel Thomas" in Drupal\Core\Cache\DatabaseBackend->getMultiple() (line 155 of core/lib/Drupal/Core/Cache/DatabaseBackend.php).

Drupal\Core\Cache\DatabaseBackend->getMultiple(Array, ) (Line: 126)
Drupal\Core\Cache\DatabaseBackend->get('preload-paths:/list-by-author/Rachel Thomas ') (Line: 224)
Drupal\path_alias\AliasManager->getAliasByPath('/node/7394', 'und') (Line: 47)
Drupal\path_alias\PathProcessor\AliasPathProcessor->processOutbound('/node/7394', Array, Object, Object) (Line: 108)
Drupal\Core\PathProcessor\PathProcessorManager->processOutbound('/node/7394', Array, Object, Object) (Line: 403)
Drupal\Core\Routing\UrlGenerator->processPath('/node/7394', Array, Object) (Line: 305)
Drupal\Core\Routing\UrlGenerator->generateFromRoute('entity.node.canonical', Array, Array, 1) (Line: 108)
Drupal\Core\Render\MetadataBubblingUrlGenerator->generateFromRoute('entity.node.canonical', Array, Array, 1) (Line: 765)
Drupal\Core\Url->toString(1) (Line: 183)
Drupal\Core\Utility\LinkGenerator->generate(Object, Object) (Line: 102)
Drupal\Core\Render\Element\Link::preRenderLink(Array)
call_user_func_array(Array, Array) (Line: 113)
Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #pre_render callbacks must be methods of a class that implements \Drupal\Core\Security\TrustedCallbackInterface or be an anonymous function. The callback was %s. See https://www.drupal.org/node/2966725', 'exception', 'Drupal\Core\Render\Element\RenderCallbackInterface') (Line: 870)
Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array) (Line: 432)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 248)
Drupal\Core\Render\Renderer->render(Array) (Line: 974)
Drupal\views\Plugin\views\field\EntityField->render_item(0, Array) (Line: 1214)
Drupal\views\Plugin\views\field\FieldPluginBase->advancedRender(Object) (Line: 238)
template_preprocess_views_view_field(Array, 'views_view_field', Array)
call_user_func_array('template_preprocess_views_view_field', Array) (Line: 261)
Drupal\Core\Theme\ThemeManager->render('views_view_field', Array) (Line: 491)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 248)
Drupal\Core\Render\Renderer->render(Array) (Line: 1796)
Drupal\views\Plugin\views\field\FieldPluginBase->theme(Object) (Line: 767)
Drupal\views\Plugin\views\style\StylePluginBase->elementPreRenderRow(Array)
call_user_func_array(Array, Array) (Line: 113)
Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #pre_render callbacks must be methods of a class that implements \Drupal\Core\Security\TrustedCallbackInterface or be an anonymous function. The callback was %s. See https://www.drupal.org/node/2966725', 'exception', 'Drupal\Core\Render\Element\RenderCallbackInterface') (Line: 870)
Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array) (Line: 432)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 248)
Drupal\Core\Render\Renderer->render(Array) (Line: 706)
Drupal\views\Plugin\views\style\StylePluginBase->renderFields(Array) (Line: 572)
Drupal\views\Plugin\views\style\StylePluginBase->renderGrouping(Array, Array, 1) (Line: 463)
Drupal\views\Plugin\views\style\StylePluginBase->render() (Line: 2177)
Drupal\views\Plugin\views\display\DisplayPluginBase->render() (Line: 1592)
Drupal\views\ViewExecutable->render() (Line: 201)
Drupal\views\Plugin\views\display\Page->execute() (Line: 1689)
Drupal\views\ViewExecutable->executeDisplay('page_1', Array) (Line: 81)
Drupal\views\Element\View::preRenderViewElement(Array)
call_user_func_array(Array, Array) (Line: 113)
Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #pre_render callbacks must be methods of a class that implements \Drupal\Core\Security\TrustedCallbackInterface or be an anonymous function. The callback was %s. See https://www.drupal.org/node/2966725', 'exception', 'Drupal\Core\Render\Element\RenderCallbackInterface') (Line: 870)
Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array) (Line: 432)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 248)
Drupal\Core\Render\Renderer->render(Array, ) (Line: 238)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 638)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 239)
Drupal\Core\Render\MainContent\HtmlRenderer->prepare(Array, Object, Object) (Line: 128)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object) (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object)
call_user_func(Array, Object, 'kernel.view', Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.view') (Line: 186)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 53)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 32)
Drupal\big_pipe\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 191)
Drupal\page_cache\StackMiddleware\PageCache->fetch(Object, 1, 1) (Line: 128)
Drupal\page_cache\StackMiddleware\PageCache->lookup(Object, 1, 1) (Line: 82)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 36)
Drupal\Core\StackMiddleware\AjaxPageState->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 741)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

List by Author: Rachel Thomas

Since herd immunity will protect us all, why do I need to get vaccinated?

Because the vaccine may not stop transmission of the virus.

Are the vaccines safe?

Yes the approved vaccines are safe. If you balance the risks, then taking the vaccine is much safer than taking your chances with COVID-19.

The agent perspective

How do we learn and understand the world? What separates us from machines? Yoshua Bengio believes it all comes down to our agency.

Building meaning: dog or ostrich

How do we build our models of the world? Yoshua Bengio explains how deep learning will help machines act to understand the world in a similar way.

The growth rate of COVID-19

We all now know about R, but sometimes it can be good to consider another number: the growth rate of an epidemic.

The maths behind combining R ratios

In a previous article we introduced the problems that can arise when combine the reproduction ratios of a disease in different settings, such as hospitals and the community. In this article we dive into the maths that helps you get to the bottom of these problems.

The problem with combining R ratios

We explore why you need to be extremely careful when combining the reproduction ratios of a disease in different settings, such as hospitals and the community.

A call to action on COVID-19

An urgent call has gone out to the scientific modelling community to help fight against the COVID-19 pandemic. Two Cambridge mathematicians are helping to lead the charge.

Phenomenal physics

What is a particle phenomenologist?

Ramanujan: Dream of the possible

A hundred years ago Ramanujan was elected FRS. Here is a look at the maths that gained him the title.

The Fields Medal 2018: Peter Scholze

Peter Scholze has received the Fields medal 2018 for transforming arithmetic algebraic geometry.

What can we see?

Physics is all about observation. But how much can we actually see with the naked eye?

Error message

List by Author: Rachel Thomas