CINXE.COM

<!DOCTYPE html> <html lang="en-GB"> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <meta http-equiv="X-UA-Compatible" content="ie=edge" /> <link rel="pingback" href="https://ioppublishing.org/xmlrpc.php" /> <style> .is-loading main { opacity: 0; transform: translate3d(0, 10vh, 0); transition: opacity 800ms, transform 600ms; } .is-loading .g-menu__main { opacity: 0; font-size: 0.9rem; transition: opacity 150ms; } .fonts-loaded, .is-loading .fonts-loaded { opacity: 1; font-size: 1.25rem; } </style> <noscript> <style> .is-loading main, .is-loading .no-js main, .is-loading .g-menu__main, .is-loading .no-js .g-menu__main { opacity: 1; transform: translate3d(0, 0, 0); } </style> </noscript> <script data-cfasync="false" data-no-defer="1" data-no-minify="1" data-no-optimize="1">var ewww_webp_supported=!1;function check_webp_feature(A,e){var w;e=void 0!==e?e:function(){},ewww_webp_supported?e(ewww_webp_supported):((w=new Image).onload=function(){ewww_webp_supported=0<w.width&&0<w.height,e&&e(ewww_webp_supported)},w.onerror=function(){e&&e(!1)},w.src="data:image/webp;base64,"+{alpha:"UklGRkoAAABXRUJQVlA4WAoAAAAQAAAAAAAAAAAAQUxQSAwAAAARBxAR/Q9ERP8DAABWUDggGAAAABQBAJ0BKgEAAQAAAP4AAA3AAP7mtQAAAA=="}[A])}check_webp_feature("alpha");</script><script data-cfasync="false" data-no-defer="1" data-no-minify="1" data-no-optimize="1">var Arrive=function(c,w){"use strict";if(c.MutationObserver&&"undefined"!=typeof HTMLElement){var r,a=0,u=(r=HTMLElement.prototype.matches||HTMLElement.prototype.webkitMatchesSelector||HTMLElement.prototype.mozMatchesSelector||HTMLElement.prototype.msMatchesSelector,{matchesSelector:function(e,t){return e instanceof HTMLElement&&r.call(e,t)},addMethod:function(e,t,r){var a=e[t];e[t]=function(){return r.length==arguments.length?r.apply(this,arguments):"function"==typeof a?a.apply(this,arguments):void 0}},callCallbacks:function(e,t){t&&t.options.onceOnly&&1==t.firedElems.length&&(e=[e[0]]);for(var r,a=0;r=e[a];a++)r&&r.callback&&r.callback.call(r.elem,r.elem);t&&t.options.onceOnly&&1==t.firedElems.length&&t.me.unbindEventWithSelectorAndCallback.call(t.target,t.selector,t.callback)},checkChildNodesRecursively:function(e,t,r,a){for(var i,n=0;i=e[n];n++)r(i,t,a)&&a.push({callback:t.callback,elem:i}),0<i.childNodes.length&&u.checkChildNodesRecursively(i.childNodes,t,r,a)},mergeArrays:function(e,t){var r,a={};for(r in e)e.hasOwnProperty(r)&&(a[r]=e[r]);for(r in t)t.hasOwnProperty(r)&&(a[r]=t[r]);return a},toElementsArray:function(e){return e=void 0!==e&&("number"!=typeof e.length||e===c)?[e]:e}}),e=(l.prototype.addEvent=function(e,t,r,a){a={target:e,selector:t,options:r,callback:a,firedElems:[]};return this._beforeAdding&&this._beforeAdding(a),this._eventsBucket.push(a),a},l.prototype.removeEvent=function(e){for(var t,r=this._eventsBucket.length-1;t=this._eventsBucket[r];r--)e(t)&&(this._beforeRemoving&&this._beforeRemoving(t),(t=this._eventsBucket.splice(r,1))&&t.length&&(t[0].callback=null))},l.prototype.beforeAdding=function(e){this._beforeAdding=e},l.prototype.beforeRemoving=function(e){this._beforeRemoving=e},l),t=function(i,n){var o=new e,l=this,s={fireOnAttributesModification:!1};return o.beforeAdding(function(t){var e=t.target;e!==c.document&&e!==c||(e=document.getElementsByTagName("html")[0]);var r=new MutationObserver(function(e){n.call(this,e,t)}),a=i(t.options);r.observe(e,a),t.observer=r,t.me=l}),o.beforeRemoving(function(e){e.observer.disconnect()}),this.bindEvent=function(e,t,r){t=u.mergeArrays(s,t);for(var a=u.toElementsArray(this),i=0;i<a.length;i++)o.addEvent(a[i],e,t,r)},this.unbindEvent=function(){var r=u.toElementsArray(this);o.removeEvent(function(e){for(var t=0;t<r.length;t++)if(this===w||e.target===r[t])return!0;return!1})},this.unbindEventWithSelectorOrCallback=function(r){var a=u.toElementsArray(this),i=r,e="function"==typeof r?function(e){for(var t=0;t<a.length;t++)if((this===w||e.target===a[t])&&e.callback===i)return!0;return!1}:function(e){for(var t=0;t<a.length;t++)if((this===w||e.target===a[t])&&e.selector===r)return!0;return!1};o.removeEvent(e)},this.unbindEventWithSelectorAndCallback=function(r,a){var i=u.toElementsArray(this);o.removeEvent(function(e){for(var t=0;t<i.length;t++)if((this===w||e.target===i[t])&&e.selector===r&&e.callback===a)return!0;return!1})},this},i=new function(){var s={fireOnAttributesModification:!1,onceOnly:!1,existing:!1};function n(e,t,r){return!(!u.matchesSelector(e,t.selector)||(e._id===w&&(e._id=a++),-1!=t.firedElems.indexOf(e._id)))&&(t.firedElems.push(e._id),!0)}var c=(i=new t(function(e){var t={attributes:!1,childList:!0,subtree:!0};return e.fireOnAttributesModification&&(t.attributes=!0),t},function(e,i){e.forEach(function(e){var t=e.addedNodes,r=e.target,a=[];null!==t&&0<t.length?u.checkChildNodesRecursively(t,i,n,a):"attributes"===e.type&&n(r,i)&&a.push({callback:i.callback,elem:r}),u.callCallbacks(a,i)})})).bindEvent;return i.bindEvent=function(e,t,r){t=void 0===r?(r=t,s):u.mergeArrays(s,t);var a=u.toElementsArray(this);if(t.existing){for(var i=[],n=0;n<a.length;n++)for(var o=a[n].querySelectorAll(e),l=0;l<o.length;l++)i.push({callback:r,elem:o[l]});if(t.onceOnly&&i.length)return r.call(i[0].elem,i[0].elem);setTimeout(u.callCallbacks,1,i)}c.call(this,e,t,r)},i},o=new function(){var a={};function i(e,t){return u.matchesSelector(e,t.selector)}var n=(o=new t(function(){return{childList:!0,subtree:!0}},function(e,r){e.forEach(function(e){var t=e.removedNodes,e=[];null!==t&&0<t.length&&u.checkChildNodesRecursively(t,r,i,e),u.callCallbacks(e,r)})})).bindEvent;return o.bindEvent=function(e,t,r){t=void 0===r?(r=t,a):u.mergeArrays(a,t),n.call(this,e,t,r)},o};d(HTMLElement.prototype),d(NodeList.prototype),d(HTMLCollection.prototype),d(HTMLDocument.prototype),d(Window.prototype);var n={};return s(i,n,"unbindAllArrive"),s(o,n,"unbindAllLeave"),n}function l(){this._eventsBucket=[],this._beforeAdding=null,this._beforeRemoving=null}function s(e,t,r){u.addMethod(t,r,e.unbindEvent),u.addMethod(t,r,e.unbindEventWithSelectorOrCallback),u.addMethod(t,r,e.unbindEventWithSelectorAndCallback)}function d(e){e.arrive=i.bindEvent,s(i,e,"unbindArrive"),e.leave=o.bindEvent,s(o,e,"unbindLeave")}}(window,void 0),ewww_webp_supported=!1;function check_webp_feature(e,t){var r;ewww_webp_supported?t(ewww_webp_supported):((r=new Image).onload=function(){ewww_webp_supported=0<r.width&&0<r.height,t(ewww_webp_supported)},r.onerror=function(){t(!1)},r.src="data:image/webp;base64,"+{alpha:"UklGRkoAAABXRUJQVlA4WAoAAAAQAAAAAAAAAAAAQUxQSAwAAAARBxAR/Q9ERP8DAABWUDggGAAAABQBAJ0BKgEAAQAAAP4AAA3AAP7mtQAAAA==",animation:"UklGRlIAAABXRUJQVlA4WAoAAAASAAAAAAAAAAAAQU5JTQYAAAD/////AABBTk1GJgAAAAAAAAAAAAAAAAAAAGQAAABWUDhMDQAAAC8AAAAQBxAREYiI/gcA"}[e])}function ewwwLoadImages(e){if(e){for(var t=document.querySelectorAll(".batch-image img, .image-wrapper a, .ngg-pro-masonry-item a, .ngg-galleria-offscreen-seo-wrapper a"),r=0,a=t.length;r<a;r++)ewwwAttr(t[r],"data-src",t[r].getAttribute("data-webp")),ewwwAttr(t[r],"data-thumbnail",t[r].getAttribute("data-webp-thumbnail"));for(var i=document.querySelectorAll(".rev_slider ul li"),r=0,a=i.length;r<a;r++){ewwwAttr(i[r],"data-thumb",i[r].getAttribute("data-webp-thumb"));for(var n=1;n<11;)ewwwAttr(i[r],"data-param"+n,i[r].getAttribute("data-webp-param"+n)),n++}for(r=0,a=(i=document.querySelectorAll(".rev_slider img")).length;r<a;r++)ewwwAttr(i[r],"data-lazyload",i[r].getAttribute("data-webp-lazyload"));for(var o=document.querySelectorAll("div.woocommerce-product-gallery__image"),r=0,a=o.length;r<a;r++)ewwwAttr(o[r],"data-thumb",o[r].getAttribute("data-webp-thumb"))}for(var l=document.querySelectorAll("video"),r=0,a=l.length;r<a;r++)ewwwAttr(l[r],"poster",e?l[r].getAttribute("data-poster-webp"):l[r].getAttribute("data-poster-image"));for(var s,c=document.querySelectorAll("img.ewww_webp_lazy_load"),r=0,a=c.length;r<a;r++)e&&(ewwwAttr(c[r],"data-lazy-srcset",c[r].getAttribute("data-lazy-srcset-webp")),ewwwAttr(c[r],"data-srcset",c[r].getAttribute("data-srcset-webp")),ewwwAttr(c[r],"data-lazy-src",c[r].getAttribute("data-lazy-src-webp")),ewwwAttr(c[r],"data-src",c[r].getAttribute("data-src-webp")),ewwwAttr(c[r],"data-orig-file",c[r].getAttribute("data-webp-orig-file")),ewwwAttr(c[r],"data-medium-file",c[r].getAttribute("data-webp-medium-file")),ewwwAttr(c[r],"data-large-file",c[r].getAttribute("data-webp-large-file")),null!=(s=c[r].getAttribute("srcset"))&&!1!==s&&s.includes("R0lGOD")&&ewwwAttr(c[r],"src",c[r].getAttribute("data-lazy-src-webp"))),c[r].className=c[r].className.replace(/\bewww_webp_lazy_load\b/,"");for(var w=document.querySelectorAll(".ewww_webp"),r=0,a=w.length;r<a;r++)e?(ewwwAttr(w[r],"srcset",w[r].getAttribute("data-srcset-webp")),ewwwAttr(w[r],"src",w[r].getAttribute("data-src-webp")),ewwwAttr(w[r],"data-orig-file",w[r].getAttribute("data-webp-orig-file")),ewwwAttr(w[r],"data-medium-file",w[r].getAttribute("data-webp-medium-file")),ewwwAttr(w[r],"data-large-file",w[r].getAttribute("data-webp-large-file")),ewwwAttr(w[r],"data-large_image",w[r].getAttribute("data-webp-large_image")),ewwwAttr(w[r],"data-src",w[r].getAttribute("data-webp-src"))):(ewwwAttr(w[r],"srcset",w[r].getAttribute("data-srcset-img")),ewwwAttr(w[r],"src",w[r].getAttribute("data-src-img"))),w[r].className=w[r].className.replace(/\bewww_webp\b/,"ewww_webp_loaded");window.jQuery&&jQuery.fn.isotope&&jQuery.fn.imagesLoaded&&(jQuery(".fusion-posts-container-infinite").imagesLoaded(function(){jQuery(".fusion-posts-container-infinite").hasClass("isotope")&&jQuery(".fusion-posts-container-infinite").isotope()}),jQuery(".fusion-portfolio:not(.fusion-recent-works) .fusion-portfolio-wrapper").imagesLoaded(function(){jQuery(".fusion-portfolio:not(.fusion-recent-works) .fusion-portfolio-wrapper").isotope()}))}function ewwwWebPInit(e){ewwwLoadImages(e),ewwwNggLoadGalleries(e),document.arrive(".ewww_webp",function(){ewwwLoadImages(e)}),document.arrive(".ewww_webp_lazy_load",function(){ewwwLoadImages(e)}),document.arrive("videos",function(){ewwwLoadImages(e)}),"loading"==document.readyState?document.addEventListener("DOMContentLoaded",ewwwJSONParserInit):("undefined"!=typeof galleries&&ewwwNggParseGalleries(e),ewwwWooParseVariations(e))}function ewwwAttr(e,t,r){null!=r&&!1!==r&&e.setAttribute(t,r)}function ewwwJSONParserInit(){"undefined"!=typeof galleries&&check_webp_feature("alpha",ewwwNggParseGalleries),check_webp_feature("alpha",ewwwWooParseVariations)}function ewwwWooParseVariations(e){if(e)for(var t=document.querySelectorAll("form.variations_form"),r=0,a=t.length;r<a;r++){var i=t[r].getAttribute("data-product_variations"),n=!1;try{for(var o in i=JSON.parse(i))void 0!==i[o]&&void 0!==i[o].image&&(void 0!==i[o].image.src_webp&&(i[o].image.src=i[o].image.src_webp,n=!0),void 0!==i[o].image.srcset_webp&&(i[o].image.srcset=i[o].image.srcset_webp,n=!0),void 0!==i[o].image.full_src_webp&&(i[o].image.full_src=i[o].image.full_src_webp,n=!0),void 0!==i[o].image.gallery_thumbnail_src_webp&&(i[o].image.gallery_thumbnail_src=i[o].image.gallery_thumbnail_src_webp,n=!0),void 0!==i[o].image.thumb_src_webp&&(i[o].image.thumb_src=i[o].image.thumb_src_webp,n=!0));n&&ewwwAttr(t[r],"data-product_variations",JSON.stringify(i))}catch(e){}}}function ewwwNggParseGalleries(e){if(e)for(var t in galleries){var r=galleries[t];galleries[t].images_list=ewwwNggParseImageList(r.images_list)}}function ewwwNggLoadGalleries(e){e&&document.addEventListener("ngg.galleria.themeadded",function(e,t){window.ngg_galleria._create_backup=window.ngg_galleria.create,window.ngg_galleria.create=function(e,t){var r=$(e).data("id");return galleries["gallery_"+r].images_list=ewwwNggParseImageList(galleries["gallery_"+r].images_list),window.ngg_galleria._create_backup(e,t)}})}function ewwwNggParseImageList(e){for(var t in e){var r=e[t];if(void 0!==r["image-webp"]&&(e[t].image=r["image-webp"],delete e[t]["image-webp"]),void 0!==r["thumb-webp"]&&(e[t].thumb=r["thumb-webp"],delete e[t]["thumb-webp"]),void 0!==r.full_image_webp&&(e[t].full_image=r.full_image_webp,delete e[t].full_image_webp),void 0!==r.srcsets)for(var a in r.srcsets)nggSrcset=r.srcsets[a],void 0!==r.srcsets[a+"-webp"]&&(e[t].srcsets[a]=r.srcsets[a+"-webp"],delete e[t].srcsets[a+"-webp"]);if(void 0!==r.full_srcsets)for(var i in r.full_srcsets)nggFSrcset=r.full_srcsets[i],void 0!==r.full_srcsets[i+"-webp"]&&(e[t].full_srcsets[i]=r.full_srcsets[i+"-webp"],delete e[t].full_srcsets[i+"-webp"])}return e}check_webp_feature("alpha",ewwwWebPInit);</script><meta name='robots' content='index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1' />  <title>Terms and conditions - IOP Publishing</title> <link rel="canonical" href="https://ioppublishing.org/terms-conditions/" /> <meta property="og:locale" content="en_US" /> <meta property="og:type" content="article" /> <meta property="og:title" content="Terms and conditions - IOP Publishing" /> <meta property="og:description" content="Terms and conditions IOP Publishing Limited is a company registered in England and Wales under company number 00467514 and we have our registered offices at No.2 The Distillery, Glassfields, Avon Street, Bristol BS2 0GR, UK. References to “IOP” mean the Institute of Physics and/or IOP Publishing as appropriate. References to “this website” are to the […]" /> <meta property="og:url" content="https://ioppublishing.org/terms-conditions/" /> <meta property="og:site_name" content="IOP Publishing" /> <meta property="article:modified_time" content="2023-04-03T14:20:42+00:00" /> <meta name="twitter:card" content="summary_large_image" /> <meta name="twitter:label1" content="Est. reading time" /> <meta name="twitter:data1" content="5 minutes" /> <script type="application/ld+json" class="yoast-schema-graph">{"@context":"https://schema.org","@graph":[{"@type":"WebPage","@id":"https://ioppublishing.org/terms-conditions/","url":"https://ioppublishing.org/terms-conditions/","name":"Terms and conditions - IOP Publishing","isPartOf":{"@id":"https://ioppublishing.org/#website"},"datePublished":"2018-03-14T10:19:48+00:00","dateModified":"2023-04-03T14:20:42+00:00","breadcrumb":{"@id":"https://ioppublishing.org/terms-conditions/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https://ioppublishing.org/terms-conditions/"]}]},{"@type":"BreadcrumbList","@id":"https://ioppublishing.org/terms-conditions/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://ioppublishing.org/"},{"@type":"ListItem","position":2,"name":"Terms and conditions"}]},{"@type":"WebSite","@id":"https://ioppublishing.org/#website","url":"https://ioppublishing.org/","name":"IOP Publishing","description":"IOP Publishing","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://ioppublishing.org/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"}]}</script>  <link rel="alternate" type="application/rss+xml" title="IOP Publishing » Feed" href="https://ioppublishing.org/feed/" /> <link rel="alternate" type="application/rss+xml" title="IOP Publishing » Comments Feed" href="https://ioppublishing.org/comments/feed/" /> <script type="text/javascript"> /* <![CDATA[ */ window._wpemojiSettings = {"baseUrl":"https:\/\/s.w.org\/images\/core\/emoji\/15.0.3\/72x72\/","ext":".png","svgUrl":"https:\/\/s.w.org\/images\/core\/emoji\/15.0.3\/svg\/","svgExt":".svg","source":{"concatemoji":"https:\/\/ioppublishing.org\/wp-includes\/js\/wp-emoji-release.min.js?ver=8d8f9726ce393f55a738c207665cfd28"}}; /*! This file is auto-generated */ !function(i,n){var o,s,e;function c(e){try{var t={supportTests:e,timestamp:(new Date).valueOf()};sessionStorage.setItem(o,JSON.stringify(t))}catch(e){}}function p(e,t,n){e.clearRect(0,0,e.canvas.width,e.canvas.height),e.fillText(t,0,0);var t=new Uint32Array(e.getImageData(0,0,e.canvas.width,e.canvas.height).data),r=(e.clearRect(0,0,e.canvas.width,e.canvas.height),e.fillText(n,0,0),new Uint32Array(e.getImageData(0,0,e.canvas.width,e.canvas.height).data));return t.every(function(e,t){return e===r[t]})}function u(e,t,n){switch(t){case"flag":return n(e,"\ud83c\udff3\ufe0f\u200d\u26a7\ufe0f","\ud83c\udff3\ufe0f\u200b\u26a7\ufe0f")?!1:!n(e,"\ud83c\uddfa\ud83c\uddf3","\ud83c\uddfa\u200b\ud83c\uddf3")&&!n(e,"\ud83c\udff4\udb40\udc67\udb40\udc62\udb40\udc65\udb40\udc6e\udb40\udc67\udb40\udc7f","\ud83c\udff4\u200b\udb40\udc67\u200b\udb40\udc62\u200b\udb40\udc65\u200b\udb40\udc6e\u200b\udb40\udc67\u200b\udb40\udc7f");case"emoji":return!n(e,"\ud83d\udc26\u200d\u2b1b","\ud83d\udc26\u200b\u2b1b")}return!1}function f(e,t,n){var r="undefined"!=typeof WorkerGlobalScope&&self instanceof WorkerGlobalScope?new OffscreenCanvas(300,150):i.createElement("canvas"),a=r.getContext("2d",{willReadFrequently:!0}),o=(a.textBaseline="top",a.font="600 32px Arial",{});return e.forEach(function(e){o[e]=t(a,e,n)}),o}function t(e){var t=i.createElement("script");t.src=e,t.defer=!0,i.head.appendChild(t)}"undefined"!=typeof Promise&&(o="wpEmojiSettingsSupports",s=["flag","emoji"],n.supports={everything:!0,everythingExceptFlag:!0},e=new Promise(function(e){i.addEventListener("DOMContentLoaded",e,{once:!0})}),new Promise(function(t){var n=function(){try{var e=JSON.parse(sessionStorage.getItem(o));if("object"==typeof e&&"number"==typeof e.timestamp&&(new Date).valueOf()<e.timestamp+604800&&"object"==typeof e.supportTests)return e.supportTests}catch(e){}return null}();if(!n){if("undefined"!=typeof Worker&&"undefined"!=typeof OffscreenCanvas&&"undefined"!=typeof URL&&URL.createObjectURL&&"undefined"!=typeof Blob)try{var e="postMessage("+f.toString()+"("+[JSON.stringify(s),u.toString(),p.toString()].join(",")+"));",r=new Blob([e],{type:"text/javascript"}),a=new Worker(URL.createObjectURL(r),{name:"wpTestEmojiSupports"});return void(a.onmessage=function(e){c(n=e.data),a.terminate(),t(n)})}catch(e){}c(n=f(s,u,p))}t(n)}).then(function(e){for(var t in e)n.supports[t]=e[t],n.supports.everything=n.supports.everything&&n.supports[t],"flag"!==t&&(n.supports.everythingExceptFlag=n.supports.everythingExceptFlag&&n.supports[t]);n.supports.everythingExceptFlag=n.supports.everythingExceptFlag&&!n.supports.flag,n.DOMReady=!1,n.readyCallback=function(){n.DOMReady=!0}}).then(function(){return e}).then(function(){var e;n.supports.everything||(n.readyCallback(),(e=n.source||{}).concatemoji?t(e.concatemoji):e.wpemoji&&e.twemoji&&(t(e.twemoji),t(e.wpemoji)))}))}((window,document),window._wpemojiSettings); /* ]]> */ </script> <style id='wp-emoji-styles-inline-css' type='text/css'> img.wp-smiley, img.emoji { display: inline !important; border: none !important; box-shadow: none !important; height: 1em !important; width: 1em !important; margin: 0 0.07em !important; vertical-align: -0.1em !important; background: none !important; padding: 0 !important; } </style> <link rel='stylesheet' id='wp-block-library-css' href='https://ioppublishing.org/wp-includes/css/dist/block-library/style.min.css?ver=8d8f9726ce393f55a738c207665cfd28' type='text/css' media='all' /> <style id='wp-block-library-theme-inline-css' type='text/css'> .wp-block-audio :where(figcaption){color:#555;font-size:13px;text-align:center}.is-dark-theme .wp-block-audio :where(figcaption){color:#ffffffa6}.wp-block-audio{margin:0 0 1em}.wp-block-code{border:1px solid #ccc;border-radius:4px;font-family:Menlo,Consolas,monaco,monospace;padding:.8em 1em}.wp-block-embed :where(figcaption){color:#555;font-size:13px;text-align:center}.is-dark-theme .wp-block-embed :where(figcaption){color:#ffffffa6}.wp-block-embed{margin:0 0 1em}.blocks-gallery-caption{color:#555;font-size:13px;text-align:center}.is-dark-theme .blocks-gallery-caption{color:#ffffffa6}:root :where(.wp-block-image figcaption){color:#555;font-size:13px;text-align:center}.is-dark-theme :root :where(.wp-block-image figcaption){color:#ffffffa6}.wp-block-image{margin:0 0 1em}.wp-block-pullquote{border-bottom:4px solid;border-top:4px solid;color:currentColor;margin-bottom:1.75em}.wp-block-pullquote cite,.wp-block-pullquote footer,.wp-block-pullquote__citation{color:currentColor;font-size:.8125em;font-style:normal;text-transform:uppercase}.wp-block-quote{border-left:.25em solid;margin:0 0 1.75em;padding-left:1em}.wp-block-quote cite,.wp-block-quote footer{color:currentColor;font-size:.8125em;font-style:normal;position:relative}.wp-block-quote.has-text-align-right{border-left:none;border-right:.25em solid;padding-left:0;padding-right:1em}.wp-block-quote.has-text-align-center{border:none;padding-left:0}.wp-block-quote.is-large,.wp-block-quote.is-style-large,.wp-block-quote.is-style-plain{border:none}.wp-block-search .wp-block-search__label{font-weight:700}.wp-block-search__button{border:1px solid #ccc;padding:.375em .625em}:where(.wp-block-group.has-background){padding:1.25em 2.375em}.wp-block-separator.has-css-opacity{opacity:.4}.wp-block-separator{border:none;border-bottom:2px solid;margin-left:auto;margin-right:auto}.wp-block-separator.has-alpha-channel-opacity{opacity:1}.wp-block-separator:not(.is-style-wide):not(.is-style-dots){width:100px}.wp-block-separator.has-background:not(.is-style-dots){border-bottom:none;height:1px}.wp-block-separator.has-background:not(.is-style-wide):not(.is-style-dots){height:2px}.wp-block-table{margin:0 0 1em}.wp-block-table td,.wp-block-table th{word-break:normal}.wp-block-table :where(figcaption){color:#555;font-size:13px;text-align:center}.is-dark-theme .wp-block-table :where(figcaption){color:#ffffffa6}.wp-block-video :where(figcaption){color:#555;font-size:13px;text-align:center}.is-dark-theme .wp-block-video :where(figcaption){color:#ffffffa6}.wp-block-video{margin:0 0 1em}:root :where(.wp-block-template-part.has-background){margin-bottom:0;margin-top:0;padding:1.25em 2.375em} </style> <style id='global-styles-inline-css' type='text/css'> :root{--wp--preset--aspect-ratio--square: 1;--wp--preset--aspect-ratio--4-3: 4/3;--wp--preset--aspect-ratio--3-4: 3/4;--wp--preset--aspect-ratio--3-2: 3/2;--wp--preset--aspect-ratio--2-3: 2/3;--wp--preset--aspect-ratio--16-9: 16/9;--wp--preset--aspect-ratio--9-16: 9/16;--wp--preset--color--black: #050505;--wp--preset--color--cyan-bluish-gray: #abb8c3;--wp--preset--color--white: #ffffff;--wp--preset--color--pale-pink: #f78da7;--wp--preset--color--vivid-red: #cf2e2e;--wp--preset--color--luminous-vivid-orange: #ff6900;--wp--preset--color--luminous-vivid-amber: #fcb900;--wp--preset--color--light-green-cyan: #7bdcb5;--wp--preset--color--vivid-green-cyan: #00d084;--wp--preset--color--pale-cyan-blue: #8ed1fc;--wp--preset--color--vivid-cyan-blue: #0693e3;--wp--preset--color--vivid-purple: #9b51e0;--wp--preset--color--red: #EB0000;--wp--preset--gradient--vivid-cyan-blue-to-vivid-purple: linear-gradient(135deg,rgba(6,147,227,1) 0%,rgb(155,81,224) 100%);--wp--preset--gradient--light-green-cyan-to-vivid-green-cyan: linear-gradient(135deg,rgb(122,220,180) 0%,rgb(0,208,130) 100%);--wp--preset--gradient--luminous-vivid-amber-to-luminous-vivid-orange: linear-gradient(135deg,rgba(252,185,0,1) 0%,rgba(255,105,0,1) 100%);--wp--preset--gradient--luminous-vivid-orange-to-vivid-red: linear-gradient(135deg,rgba(255,105,0,1) 0%,rgb(207,46,46) 100%);--wp--preset--gradient--very-light-gray-to-cyan-bluish-gray: linear-gradient(135deg,rgb(238,238,238) 0%,rgb(169,184,195) 100%);--wp--preset--gradient--cool-to-warm-spectrum: linear-gradient(135deg,rgb(74,234,220) 0%,rgb(151,120,209) 20%,rgb(207,42,186) 40%,rgb(238,44,130) 60%,rgb(251,105,98) 80%,rgb(254,248,76) 100%);--wp--preset--gradient--blush-light-purple: linear-gradient(135deg,rgb(255,206,236) 0%,rgb(152,150,240) 100%);--wp--preset--gradient--blush-bordeaux: linear-gradient(135deg,rgb(254,205,165) 0%,rgb(254,45,45) 50%,rgb(107,0,62) 100%);--wp--preset--gradient--luminous-dusk: linear-gradient(135deg,rgb(255,203,112) 0%,rgb(199,81,192) 50%,rgb(65,88,208) 100%);--wp--preset--gradient--pale-ocean: linear-gradient(135deg,rgb(255,245,203) 0%,rgb(182,227,212) 50%,rgb(51,167,181) 100%);--wp--preset--gradient--electric-grass: linear-gradient(135deg,rgb(202,248,128) 0%,rgb(113,206,126) 100%);--wp--preset--gradient--midnight: linear-gradient(135deg,rgb(2,3,129) 0%,rgb(40,116,252) 100%);--wp--preset--font-size--small: 13px;--wp--preset--font-size--medium: clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.556), 20px);--wp--preset--font-size--large: clamp(22.041px, 1.378rem + ((1vw - 3.2px) * 1.293), 36px);--wp--preset--font-size--x-large: clamp(25.014px, 1.563rem + ((1vw - 3.2px) * 1.573), 42px);--wp--preset--font-size--subheading: 30px;--wp--preset--font-size--level-2: 2.0rem;--wp--preset--font-size--page-title: 2.4rem;--wp--preset--font-size--heading: 4.375rem;--wp--preset--font-family--franklin-gothic-urw: "franklin-gothic-urw", sans-serif;--wp--preset--spacing--20: 0.44rem;--wp--preset--spacing--30: clamp(1.5rem, 5vw, 2rem);--wp--preset--spacing--40: clamp(1.8rem, 1.8rem + ((1vw - 0.48rem) * 2.885), 3rem);--wp--preset--spacing--50: clamp(2.5rem, 8vw, 6.5rem);--wp--preset--spacing--60: 2.25rem;--wp--preset--spacing--70: 3.38rem;--wp--preset--spacing--80: 5.06rem;--wp--preset--shadow--natural: 6px 6px 9px rgba(0, 0, 0, 0.2);--wp--preset--shadow--deep: 12px 12px 50px rgba(0, 0, 0, 0.4);--wp--preset--shadow--sharp: 6px 6px 0px rgba(0, 0, 0, 0.2);--wp--preset--shadow--outlined: 6px 6px 0px -3px rgba(255, 255, 255, 1), 6px 6px rgba(0, 0, 0, 1);--wp--preset--shadow--crisp: 6px 6px 0px rgba(0, 0, 0, 1);}:root { --wp--style--global--content-size: 1113px;--wp--style--global--wide-size: 1400px; }:where(body) { margin: 0; }.wp-site-blocks { padding-top: var(--wp--style--root--padding-top); padding-bottom: var(--wp--style--root--padding-bottom); }.has-global-padding { padding-right: var(--wp--style--root--padding-right); padding-left: var(--wp--style--root--padding-left); }.has-global-padding > .alignfull { margin-right: calc(var(--wp--style--root--padding-right) * -1); margin-left: calc(var(--wp--style--root--padding-left) * -1); }.has-global-padding :where(:not(.alignfull.is-layout-flow) > .has-global-padding:not(.wp-block-block, .alignfull)) { padding-right: 0; padding-left: 0; }.has-global-padding :where(:not(.alignfull.is-layout-flow) > .has-global-padding:not(.wp-block-block, .alignfull)) > .alignfull { margin-left: 0; margin-right: 0; }.wp-site-blocks > .alignleft { float: left; margin-right: 2em; }.wp-site-blocks > .alignright { float: right; margin-left: 2em; }.wp-site-blocks > .aligncenter { justify-content: center; margin-left: auto; margin-right: auto; }:where(.wp-site-blocks) > * { margin-block-start: 24px; margin-block-end: 0; }:where(.wp-site-blocks) > :first-child { margin-block-start: 0; }:where(.wp-site-blocks) > :last-child { margin-block-end: 0; }:root { --wp--style--block-gap: 24px; }:root :where(.is-layout-flow) > :first-child{margin-block-start: 0;}:root :where(.is-layout-flow) > :last-child{margin-block-end: 0;}:root :where(.is-layout-flow) > *{margin-block-start: 24px;margin-block-end: 0;}:root :where(.is-layout-constrained) > :first-child{margin-block-start: 0;}:root :where(.is-layout-constrained) > :last-child{margin-block-end: 0;}:root :where(.is-layout-constrained) > *{margin-block-start: 24px;margin-block-end: 0;}:root :where(.is-layout-flex){gap: 24px;}:root :where(.is-layout-grid){gap: 24px;}.is-layout-flow > .alignleft{float: left;margin-inline-start: 0;margin-inline-end: 2em;}.is-layout-flow > .alignright{float: right;margin-inline-start: 2em;margin-inline-end: 0;}.is-layout-flow > .aligncenter{margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > .alignleft{float: left;margin-inline-start: 0;margin-inline-end: 2em;}.is-layout-constrained > .alignright{float: right;margin-inline-start: 2em;margin-inline-end: 0;}.is-layout-constrained > .aligncenter{margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > :where(:not(.alignleft):not(.alignright):not(.alignfull)){max-width: var(--wp--style--global--content-size);margin-left: auto !important;margin-right: auto !important;}.is-layout-constrained > .alignwide{max-width: var(--wp--style--global--wide-size);}body .is-layout-flex{display: flex;}.is-layout-flex{flex-wrap: wrap;align-items: center;}.is-layout-flex > :is(*, div){margin: 0;}body .is-layout-grid{display: grid;}.is-layout-grid > :is(*, div){margin: 0;}body{background-color: var(--wp--preset--color--white);color: var(--wp--preset--color--black);font-family: var(--wp--preset--font-family--system-font);font-size: var(--wp--preset--font-size--medium);line-height: 1.6;--wp--style--root--padding-top: 0px;--wp--style--root--padding-right: 0px;--wp--style--root--padding-bottom: 0px;--wp--style--root--padding-left: 0px;}a:where(:not(.wp-element-button)){color: var(--wp--preset--color--contrast);text-decoration: underline;}:root :where(a:where(:not(.wp-element-button)):hover){text-decoration: none;}:root :where(a:where(:not(.wp-element-button)):active){color: var(--wp--preset--color--secondary);text-decoration: none;}h1, h2, h3, h4, h5, h6{font-weight: 400;line-height: 1.4;}h1{font-size: clamp(2.032rem, 2.032rem + ((1vw - 0.2rem) * 2.36), 3.625rem);line-height: 1.2;}h2{font-size: clamp(2.625rem, calc(2.625rem + ((1vw - 0.48rem) * 8.4135)), 3.25rem);line-height: 1.2;}h3{font-size: var(--wp--preset--font-size--x-large);}h4{font-size: var(--wp--preset--font-size--large);}h5{font-size: var(--wp--preset--font-size--medium);font-weight: 700;text-transform: uppercase;}h6{font-size: var(--wp--preset--font-size--medium);text-transform: uppercase;}:root :where(.wp-element-button, .wp-block-button__link){background-color: var(--wp--preset--color--primary);border-radius: 0;border-width: 0;color: var(--wp--preset--color--contrast);font-family: inherit;font-size: inherit;line-height: inherit;padding: calc(0.667em + 2px) calc(1.333em + 2px);text-decoration: none;}:root :where(.wp-element-button:visited, .wp-block-button__link:visited){color: var(--wp--preset--color--contrast);}:root :where(.wp-element-button:hover, .wp-block-button__link:hover){background-color: var(--wp--preset--color--contrast);color: var(--wp--preset--color--base);}:root :where(.wp-element-button:focus, .wp-block-button__link:focus){background-color: var(--wp--preset--color--contrast);color: var(--wp--preset--color--base);}:root :where(.wp-element-button:active, .wp-block-button__link:active){background-color: var(--wp--preset--color--secondary);color: var(--wp--preset--color--base);}.has-black-color{color: var(--wp--preset--color--black) !important;}.has-cyan-bluish-gray-color{color: var(--wp--preset--color--cyan-bluish-gray) !important;}.has-white-color{color: var(--wp--preset--color--white) !important;}.has-pale-pink-color{color: var(--wp--preset--color--pale-pink) !important;}.has-vivid-red-color{color: var(--wp--preset--color--vivid-red) !important;}.has-luminous-vivid-orange-color{color: var(--wp--preset--color--luminous-vivid-orange) !important;}.has-luminous-vivid-amber-color{color: var(--wp--preset--color--luminous-vivid-amber) !important;}.has-light-green-cyan-color{color: var(--wp--preset--color--light-green-cyan) !important;}.has-vivid-green-cyan-color{color: var(--wp--preset--color--vivid-green-cyan) !important;}.has-pale-cyan-blue-color{color: var(--wp--preset--color--pale-cyan-blue) !important;}.has-vivid-cyan-blue-color{color: var(--wp--preset--color--vivid-cyan-blue) !important;}.has-vivid-purple-color{color: var(--wp--preset--color--vivid-purple) !important;}.has-red-color{color: var(--wp--preset--color--red) !important;}.has-black-background-color{background-color: var(--wp--preset--color--black) !important;}.has-cyan-bluish-gray-background-color{background-color: var(--wp--preset--color--cyan-bluish-gray) !important;}.has-white-background-color{background-color: var(--wp--preset--color--white) !important;}.has-pale-pink-background-color{background-color: var(--wp--preset--color--pale-pink) !important;}.has-vivid-red-background-color{background-color: var(--wp--preset--color--vivid-red) !important;}.has-luminous-vivid-orange-background-color{background-color: var(--wp--preset--color--luminous-vivid-orange) !important;}.has-luminous-vivid-amber-background-color{background-color: var(--wp--preset--color--luminous-vivid-amber) !important;}.has-light-green-cyan-background-color{background-color: var(--wp--preset--color--light-green-cyan) !important;}.has-vivid-green-cyan-background-color{background-color: var(--wp--preset--color--vivid-green-cyan) !important;}.has-pale-cyan-blue-background-color{background-color: var(--wp--preset--color--pale-cyan-blue) !important;}.has-vivid-cyan-blue-background-color{background-color: var(--wp--preset--color--vivid-cyan-blue) !important;}.has-vivid-purple-background-color{background-color: var(--wp--preset--color--vivid-purple) !important;}.has-red-background-color{background-color: var(--wp--preset--color--red) !important;}.has-black-border-color{border-color: var(--wp--preset--color--black) !important;}.has-cyan-bluish-gray-border-color{border-color: var(--wp--preset--color--cyan-bluish-gray) !important;}.has-white-border-color{border-color: var(--wp--preset--color--white) !important;}.has-pale-pink-border-color{border-color: var(--wp--preset--color--pale-pink) !important;}.has-vivid-red-border-color{border-color: var(--wp--preset--color--vivid-red) !important;}.has-luminous-vivid-orange-border-color{border-color: var(--wp--preset--color--luminous-vivid-orange) !important;}.has-luminous-vivid-amber-border-color{border-color: var(--wp--preset--color--luminous-vivid-amber) !important;}.has-light-green-cyan-border-color{border-color: var(--wp--preset--color--light-green-cyan) !important;}.has-vivid-green-cyan-border-color{border-color: var(--wp--preset--color--vivid-green-cyan) !important;}.has-pale-cyan-blue-border-color{border-color: var(--wp--preset--color--pale-cyan-blue) !important;}.has-vivid-cyan-blue-border-color{border-color: var(--wp--preset--color--vivid-cyan-blue) !important;}.has-vivid-purple-border-color{border-color: var(--wp--preset--color--vivid-purple) !important;}.has-red-border-color{border-color: var(--wp--preset--color--red) !important;}.has-vivid-cyan-blue-to-vivid-purple-gradient-background{background: var(--wp--preset--gradient--vivid-cyan-blue-to-vivid-purple) !important;}.has-light-green-cyan-to-vivid-green-cyan-gradient-background{background: var(--wp--preset--gradient--light-green-cyan-to-vivid-green-cyan) !important;}.has-luminous-vivid-amber-to-luminous-vivid-orange-gradient-background{background: var(--wp--preset--gradient--luminous-vivid-amber-to-luminous-vivid-orange) !important;}.has-luminous-vivid-orange-to-vivid-red-gradient-background{background: var(--wp--preset--gradient--luminous-vivid-orange-to-vivid-red) !important;}.has-very-light-gray-to-cyan-bluish-gray-gradient-background{background: var(--wp--preset--gradient--very-light-gray-to-cyan-bluish-gray) !important;}.has-cool-to-warm-spectrum-gradient-background{background: var(--wp--preset--gradient--cool-to-warm-spectrum) !important;}.has-blush-light-purple-gradient-background{background: var(--wp--preset--gradient--blush-light-purple) !important;}.has-blush-bordeaux-gradient-background{background: var(--wp--preset--gradient--blush-bordeaux) !important;}.has-luminous-dusk-gradient-background{background: var(--wp--preset--gradient--luminous-dusk) !important;}.has-pale-ocean-gradient-background{background: var(--wp--preset--gradient--pale-ocean) !important;}.has-electric-grass-gradient-background{background: var(--wp--preset--gradient--electric-grass) !important;}.has-midnight-gradient-background{background: var(--wp--preset--gradient--midnight) !important;}.has-small-font-size{font-size: var(--wp--preset--font-size--small) !important;}.has-medium-font-size{font-size: var(--wp--preset--font-size--medium) !important;}.has-large-font-size{font-size: var(--wp--preset--font-size--large) !important;}.has-x-large-font-size{font-size: var(--wp--preset--font-size--x-large) !important;}.has-subheading-font-size{font-size: var(--wp--preset--font-size--subheading) !important;}.has-level-2-font-size{font-size: var(--wp--preset--font-size--level-2) !important;}.has-page-title-font-size{font-size: var(--wp--preset--font-size--page-title) !important;}.has-heading-font-size{font-size: var(--wp--preset--font-size--heading) !important;}.has-franklin-gothic-urw-font-family{font-family: var(--wp--preset--font-family--franklin-gothic-urw) !important;} :root :where(.wp-block-pullquote){font-size: clamp(0.984em, 0.984rem + ((1vw - 0.2em) * 0.764), 1.5em);line-height: 1.6;} </style> <link rel='stylesheet' id='chart-builder-css' href='https://ioppublishing.org/wp-content/plugins/chart-builder/public/css/chart-builder-public.css?ver=20.0.8.1' type='text/css' media='all' /> <link rel='stylesheet' id='lazyload-video-css-css' href='https://ioppublishing.org/wp-content/plugins/lazy-load-for-videos/public/css/lazyload-shared.css?ver=2.18.3' type='text/css' media='all' /> <style id='lazyload-video-css-inline-css' type='text/css'> .entry-content a.lazy-load-youtube, a.lazy-load-youtube, .lazy-load-vimeo{ background-size: cover; }.titletext.youtube { display: none; }.lazy-load-div:before { content: "\25B6"; text-shadow: 0px 0px 60px rgba(0,0,0,0.8); } </style> <link rel='stylesheet' id='styles-css' href='https://ioppublishing.org/wp-content/themes/snap/dist/styles.ba40bd61464877a74909ec2b82283ade.css' type='text/css' media='all' /> <script type="text/javascript" src="https://ioppublishing.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.1" id="jquery-core-js"></script> <script type="text/javascript" defer src="https://ioppublishing.org/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.1" id="jquery-migrate-js"></script> <script type="text/javascript" id="chart-builder-plugin-js-extra"> /* <![CDATA[ */ var chart_builder_public_ajax = {"ajax_url":"https:\/\/ioppublishing.org\/wp-admin\/admin-ajax.php"}; /* ]]> */ </script> <script type="text/javascript" defer src="https://ioppublishing.org/wp-content/plugins/chart-builder/public/js/chart-builder-public-plugin.js?ver=20.0.8.1" id="chart-builder-plugin-js"></script> <script type="text/javascript" id="chart-builder-js-extra"> /* <![CDATA[ */ var aysChartBuilderPublicChartSettings = {"ajax":{"url":"https:\/\/ioppublishing.org\/wp-admin\/admin-ajax.php","nonces":{"get_chart_source_data":"df3888a629"},"actions":{"get_chart_source_data":"ays_chart_get_chart_source_data"}}}; /* ]]> */ </script> <script type="text/javascript" defer src="https://ioppublishing.org/wp-content/plugins/chart-builder/public/js/chart-builder-public.js?ver=20.0.8.1" id="chart-builder-js"></script> <link rel="https://api.w.org/" href="https://ioppublishing.org/wp-json/" /><link rel="alternate" title="JSON" type="application/json" href="https://ioppublishing.org/wp-json/wp/v2/pages/4412" /><link rel="EditURI" type="application/rsd+xml" title="RSD" href="https://ioppublishing.org/xmlrpc.php?rsd" /> <link rel='shortlink' href='https://ioppublishing.org/?p=4412' /> <link rel="alternate" title="oEmbed (JSON)" type="application/json+oembed" href="https://ioppublishing.org/wp-json/oembed/1.0/embed?url=https%3A%2F%2Fioppublishing.org%2Fterms-conditions%2F" /> <link rel="alternate" title="oEmbed (XML)" type="text/xml+oembed" href="https://ioppublishing.org/wp-json/oembed/1.0/embed?url=https%3A%2F%2Fioppublishing.org%2Fterms-conditions%2F&format=xml" />  <noscript><style>.lazyload[data-src]{display:none !important;}</style></noscript><style>.lazyload{background-image:none !important;}.lazyload:before{background-image:none !important;}</style><link rel="icon" href="https://ioppublishing.org/wp-content/uploads/2023/04/cropped-iopp-favicon-32x32.png" sizes="32x32" /> <link rel="icon" href="https://ioppublishing.org/wp-content/uploads/2023/04/cropped-iopp-favicon-192x192.png" sizes="192x192" /> <link rel="apple-touch-icon" href="https://ioppublishing.org/wp-content/uploads/2023/04/cropped-iopp-favicon-180x180.png" /> <meta name="msapplication-TileImage" content="https://ioppublishing.org/wp-content/uploads/2023/04/cropped-iopp-favicon-270x270.png" /> <style type="text/css" id="wp-custom-css"> html {scroll-padding: 80px;} </style>  <script> (function () { var newBrowser = ('fetch' in window && 'Promise' in window && 'assign' in Object && 'keys' in Object); if (! newBrowser) { var scriptEl = document.createElement('script'); console.log('You need some polyfills, loading them now...'); scriptEl.src = 'https://polyfill.io/v3/polyfill.min.js'; scriptEl.async = false; document.head.appendChild(scriptEl); } })(); window.MSInputMethodContext && document.documentMode && document.write('<script src="https://cdn.jsdelivr.net/gh/nuxodin/ie11CustomProperties@4.1.0/ie11CustomProperties.min.js"><\/script>'); </script>  <script type="didomi/javascript" data-vendor="didomi:google"> (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) })(window,document,'script','https://www.google-analytics.com/analytics.js','ga'); ga('create', 'UA-2254461-26', 'auto'); ga('send', 'pageview'); </script>   <script> (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0], j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src= 'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f); })(window,document,'script','dataLayer','GTM-WFDKJD'); </script>    </head> <body class="page-template-default page page-id-4412 flex flex-col min-h-screen bg-white no-js font-body text-black"> <script data-cfasync="false" data-no-defer="1" data-no-minify="1" data-no-optimize="1">if(typeof ewww_webp_supported==="undefined"){var ewww_webp_supported=!1}if(ewww_webp_supported){document.body.classList.add("webp-support")}</script> <script> document.body.classList.add('is-loading'); </script> <a class="sr-only focus:not-sr-only bg-white z-30 max-w-full focus:w-48 focus:fixed" href="#main"> <span class="block p-2">Skip to main content</span> </a> <div class="c-browser-alert-banner fixed left-0 top-0 w-full h-full pointer-events-none z-30"> <div class="c-browser-alert-banner__text h-24 shadow-lg flex"> <div class="c-browser-alert-banner__container"> <p class="my-0 mb-4 lg:mb-0 lg:mr-4 font-normal max-w-none"> Your web browser is out of date. Please update it for greater security, speed and the best experience on this site. </p> <a class="c-btn c-btn--secondary" href="https://bestvpn.org/outdatedbrowser/en.html" target="_blank" rel="noopener noreferrer"> Choose a different browser <svg xmlns="http://www.w3.org/2000/svg" width="50" height="50" class="ml-2 w-4 h-4"> <use xlink:href="/wp-content/themes/snap/dist/sprite3c04215a374871e6.svg#arrow-horizontal"></use> </svg> </a> </div> </div> </div>  <section class="g-header w-full z-20 bg-white drop-shadow-md"> <header id="header-sticky" class="w-full" data-behaviour="menu" data-header> <nav class="g-header__nav flex justify-between items-center px-8" data-nav aria-label="Main"> <a class="g-header__home-link order-last my-0 lg:order-first" href="/" aria-label="IOP Publishing Home" data-home-link> <svg xmlns="http://www.w3.org/2000/svg" width="132" height="21" class="w-32 h-auto"> <use xlink:href="/wp-content/themes/snap/dist/sprite3c04215a374871e6.svg#logo-iopp"></use> </svg> </a> <div class="flex justify-end lg:mt-0 lg:block h-18"> <button class="g-header__expand-button font-bold relative z-1 items-center" data-menu-button="data-menu-button" type="button" aria-expanded="false" aria-haspopup="true"> <span class="pointer-events-none font-heading leading-normal" data-text></span> <span class="g-header__menu-icon pointer-events-none ml-3"> <span></span> </span> </button> <div class="g-menu__content text-left h-full overflow-hidden md:overflow-auto bg-black px-8 lg:px-0 lg:bg-white lg:overflow-hidden py-4 text-14 pb-16 lg:py-0" data-menu-content="data-menu-content"> <ul class="lg:flex lg:space-x-4 h-full max-w-full" role="menu"> <li role="menuitem" class="g-menu__item block lg:inline-flex lg:space-x-2 items-center "> <a class="items-center block text-18 my-0 pb-5 lg:pb-0 lg:px-2 no-underline text-red lg:hover:text-black whitespace-nowrap" href="https://ioppublishing.org/researchers/" data-index="1">Researchers</a> </li> <li role="menuitem" class="g-menu__item block lg:inline-flex lg:space-x-2 items-center "> <a class="items-center block text-18 my-0 pb-5 lg:pb-0 lg:px-2 no-underline text-red lg:hover:text-black whitespace-nowrap" href="https://ioppublishing.org/librarians/" data-index="2">Librarians</a> </li> <li role="menuitem" class="g-menu__item block lg:inline-flex lg:space-x-2 items-center "> <a class="items-center block text-18 my-0 pb-5 lg:pb-0 lg:px-2 no-underline text-red lg:hover:text-black whitespace-nowrap" href="https://ioppublishing.org/partners/" data-index="3">Partners</a> </li> <li role="menuitem" class="g-menu__item block lg:inline-flex lg:space-x-2 items-center "> <a class="items-center block text-18 my-0 pb-5 lg:pb-0 lg:px-2 no-underline text-red lg:hover:text-black whitespace-nowrap" href="https://ioppublishing.org/publications/" data-index="4">Publications</a> </li> <li role="menuitem" class="g-menu__item block lg:inline-flex lg:space-x-2 items-center "> <a class="items-center block text-18 my-0 pb-5 lg:pb-0 lg:px-2 no-underline text-red lg:hover:text-black whitespace-nowrap" href="https://ioppublishing.org/news/" data-index="5">News</a> </li> <li role="menuitem" class="g-menu__item block lg:inline-flex lg:space-x-2 items-center "> <a class="items-center block text-18 my-0 pb-5 lg:pb-0 lg:px-2 no-underline text-red lg:hover:text-black whitespace-nowrap" href="https://ioppublishing.org/about-us/" data-index="6">About Us</a> </li> <li role="menuitem" class="g-menu__item block lg:inline-flex lg:space-x-2 items-center "> <a class="items-center block text-18 my-0 pb-5 lg:pb-0 lg:px-2 no-underline text-red lg:hover:text-black whitespace-nowrap" href="https://ioppublishing.org/work-for-us/" data-index="7">Work with Us</a> </li> </ul> <button class="g-header__search-button hidden relative z-1 items-center px-2 py-1 md:py-2.5 border-red rounded-4 border-1 md:text-16 md:leading-16 lg:mr-0 hover:underline focus:underline" data-search-button type="button" aria-expanded="false" aria-haspopup="true"> <span class="pointer-events-none" data-text>Search</span> <svg xmlns="http://www.w3.org/2000/svg" width="50" height="50" class="w-4 h-4 ml-2"> <use xlink:href="/wp-content/themes/snap/dist/sprite3c04215a374871e6.svg#icon-search"></use> </svg> </button> <div class="g-menu__search bg-red text-white py-8 px-2 left-0" data-search-content> <div class="absolute w-full top-4"> <div class="container"> <button class="py-2 ml-auto flex items-center font-bold relative z-1 hover:underline focus:underline" data-close> Close <svg xmlns="http://www.w3.org/2000/svg" width="50" height="50" class="g-menu__close-icon w-6 h-6 ml-2"> <use xlink:href="/wp-content/themes/snap/dist/sprite3c04215a374871e6.svg#icon-plus-close"></use> </svg> </button> </div> </div> <form action="https://ioppublishing.org" method="get" role="search" class="container-sm"> <div class="space-y-4 sm:flex sm:space-x-4 sm:space-y-0"> <div class="flex-1"> <label for="menu_search" class="block mb-2 font-bold text-20">Search</label> <input type="text" name="s" id="menu_search" class="c-header-search__input bg-transparent appearance-none block w-full" /> </div> <button aria-label="submit" class="c-btn c-btn--secondary self-end inline-flex items-center justify-center sm:w-auto md:py-3.5 md:border-2 md:border-red lg:py-3"> <span class="mr-2">Search</span> <svg xmlns="http://www.w3.org/2000/svg" width="50" height="50" class="w-4 h-4"> <use xlink:href="/wp-content/themes/snap/dist/sprite3c04215a374871e6.svg#icon-search"></use> </svg> </button> </div> </form> </div> </div> </div> </nav> </header> </section> <main class="flex-grow flex-shrink-0 page pt-8 lg:pt-28" id="main"> <div class="entry-content"> <div style="height:50px" aria-hidden="true" class="wp-block-spacer"></div> <div class="wp-block-group alignfull p-heading has-global-padding is-layout-constrained wp-container-core-group-is-layout-2 wp-block-group-is-layout-constrained" style="padding-right:0;padding-left:0"> <div class="wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained"> <h1 class="wp-block-heading">Terms and conditions</h1> <p>IOP Publishing Limited is a company registered in England and Wales under company number 00467514 and we have our registered offices at No.2 The Distillery, Glassfields, Avon Street, Bristol BS2 0GR, UK.</p> <p>References to “IOP” mean the Institute of Physics and/or IOP Publishing as appropriate. References to “this website” are to the specific IOP website from which the user is linking to these Terms and Conditions.</p> <p>Please read this document carefully. By accessing or using any part of this website, you confirm that you accept these Terms and Conditions and that you shall comply with them all. If you do not agree to these Terms and Conditions you must not use this website. If you have any questions, please-mail <a href="mailto:customerservices@ioppublishing.org">customerservices@ioppublishing.org</a>.</p> <p>We amend these Terms and Conditions from time to time. Every time you wish to use this website, please check them first to ensure that you understand those that apply at that time. </p> <p>These Terms and Conditions were last updated on 15 November 2022.</p> <h2 class="wp-block-heading">Using this website</h2> <p>This website is maintained by IOP for personal viewing and use. For the purposes of these Terms and Conditions, all references to the “user” are to any person who accesses or uses this website or any of the services provided by it, whether on their own behalf or on behalf of an organisation or institution that they represent.</p> <h2 class="wp-block-heading">User responsibilities</h2> <ol class="wp-block-list"> <li>The user shall keep user names and passwords strictly confidential and secure. The user shall not disclose this information to any third party.</li> <li>The user shall use this website only in accordance with these Terms and Conditions, and only for lawful purposes and in a lawful manner.</li> <li>If the user submits information for display on this website then they shall ensure that it is true, accurate, complete and up to date, and shall update it whenever necessary. The user shall ensue that no data are uploaded or submitted that are defamatory, obscene, abusive or otherwise objectionable or in breach of any applicable laws or third-party rights.</li> <li>By submitting data for display on this website, the user warrants that they have taken all reasonable precautions to ensure that they are free from viruses and anything else that might have a contaminating or destructive effect on any part of this website or any other technology.</li> <li>The user shall configure their information technology, computer programs and platform to access this website. The user shall use their own virus protection software.</li> <li>The user shall make no attempt to undermine the integrity of this website or any of its content, and shall not adapt or circumvent the systems in place in connection with this website nor access it other than through normal operations.</li> <li>Systematic downloading of files is prohibited.</li> </ol> <h3 class="wp-block-heading">Privacy policy</h3> <ol class="wp-block-list" start="8"> <li>IOP takes the privacy of its users very seriously and is committed to safeguarding that privacy. Refer<a href="https://ioppublishing.org/privacyPolicy"> </a>to <a href="https://ioppublishing.org/legal/privacy-cookies-policy/">IOP’s Privacy Policy</a> for more details.</li> </ol> <h3 class="wp-block-heading">Disclaimer</h3> <ol class="wp-block-list" start="9"> <li>The terms of <a href="https://ioppublishing.org/legal/disclaimer-terms/">IOP’s Disclaimer</a> are incorporated within these Terms and Conditions.</li> </ol> <h3 class="wp-block-heading">Miscellaneous</h3> <ol class="wp-block-list" start="10"> <li>Unless otherwise stated, all competitions offered by IOP from this website (“competitions”) are open to anyone aged 18 or over, except for employees (and their families) of any company in the same group as IOP or anyone else connected with running competitions. As not all countries in the world accept the legality of competitions, it is the sole responsibility of each non-UK-based entrant to ensure that they are not breaching any laws of their country of residence by submitting an entry. IOP shall not be held responsible for any entrant entering any competitions unlawfully. If in any doubt, the entrant shall check with the relevant authorities in their country. All entrants shall register for competitions by giving their correct name and postal address, together with their e-mail address. By registering for competitions, users acknowledge that they have read and agreed to the provisions contained in IOP’s Privacy Policy, as referred to in clause 7 above. All competitions will be subject to the Terms and Conditions as displayed on this website.</li> <li>Where this website contains links to other sites and resources provided by third parties, these links are provided for the user’s information only. Such links shall not be interpreted as approval to use of those linked websites or information the user may obtain from them. IOP has no control over the contents of those sites or resources. Any information submitted by the user, other than personal data that are covered by IOP’s Privacy Policy, shall be treated by IOP as non-confidential and IOP shall be entitled to reproduce, distribute and communicate that information to others without restriction and without obligation.</li> <li>Without limiting its rights to seek other remedies, IOP reserves the right to change, alter or remove all or part of this website, temporarily or permanently, and without notice and without liability. This includes the right to remove offending material placed on this website by the user that IOP considers, in its discretion, to constitute misuse of this website or to be potentially harmful to other users.</li> <li>These Terms and Conditions are in addition to, and supplement, any other Terms and Conditions that the user is required to accept in order to access any of IOP’s specific goods or services on this website.</li> <li>IOP will use its reasonable endeavours to allow uninterrupted access to this website but cannot guarantee that access will always be available. IOP may suspend or withdraw or restrict the availability of all or any part of this website for business and operational reasons. We will try to give you reasonable notice of any suspension or withdrawal wherever reasonably practicable.</li> <li>IOP has the right to amend these Terms and Conditions at any time and continued use of this website after the change shall be deemed as acceptance of the changed Terms and Conditions. It is the responsibility of the user to check the Terms and Conditions frequently for changes and to discontinue use if the user is unhappy with the changes.</li> <li>IOP reserves the right to prohibit access by persons to all or part of this website or the services provided on it at its sole discretion.</li> <li>Each provision of these Terms and Conditions shall be construed separately and independently of each other and the invalidity of any one part shall not affect the validity of any other part.</li> <li>English law governs these Terms and Conditions and the English courts shall have exclusive jurisdiction to determine any disputes.</li> <li>This website may include trade marks of IOP. You are not permitted to use these trade marks without IOP’s prior written approval.<strong> </strong></li> </ol> <h2 class="wp-block-heading"><strong><br>Contact information</strong></h2> <p>If the user has any questions or comments about these Terms and Conditions, they should contact:</p> <p><strong>Legal Team</strong></p> <p>IOP Publishing<br><span class="LrzXr">No.2, The Distillery,</span><span class="LrzXr"> Glassfields, Avon St, Bristol BS2 0GR</span></p> <p>Tel +44 (0)117 929 7481</p> <p>E-mail <a href="mailto:legal@ioplegal.org"><u>legal@ioplegal.org</u></a></p> </div> </div> <div style="height:100px" aria-hidden="true" class="wp-block-spacer"></div> </div> </main> <footer class="g-footer border-t-2 border-black"> <div class="container"> <div class="g-footer__main py-11 md:py-[100px] text-18 leading-22"> <div class="w-full"> <div class="space-y-0 md:gap-24 md:flex"> <div> <p class="mb-6 font-bold"> Legal </p> <ul class="g-footer__menu lg:-mt-1" role="menu"> <li role="menuitem"> <a class="block pb-3 text-primary hover:underline focus:underline hover:text-primary-dark focus:text-primary-dark" href="https://ioppublishing.org/advertising-policy/"> Advertising policy </a> </li> <li role="menuitem"> <a class="block pb-3 text-primary hover:underline focus:underline hover:text-primary-dark focus:text-primary-dark" href="https://ioppublishing.org/legal/copyright/"> Copyright notice </a> </li> <li role="menuitem"> <a class="block pb-3 text-primary hover:underline focus:underline hover:text-primary-dark focus:text-primary-dark" href="https://ioppublishing.org/legal/textanddataminingpolicy/"> Text and Data Mining (T&DM) Policy </a> </li> <li role="menuitem"> <a class="block pb-3 text-primary hover:underline focus:underline hover:text-primary-dark focus:text-primary-dark" href="https://ioppublishing.org/legal/disclaimer-terms/"> Disclaimer terms </a> </li> <li role="menuitem"> <a class="block pb-3 text-primary hover:underline focus:underline hover:text-primary-dark focus:text-primary-dark" href="https://ioppublishing.org/federated-access-privacy-statement/"> Federated access privacy statement </a> </li> <li role="menuitem"> <a class="block pb-3 text-primary hover:underline focus:underline hover:text-primary-dark focus:text-primary-dark" href="https://ioppublishing.org/legal/privacy-cookies-policy/"> Privacy and cookies </a> </li> <li role="menuitem"> <a class="block pb-3 text-primary hover:underline focus:underline hover:text-primary-dark focus:text-primary-dark" href="https://ioppublishing.org/terms-conditions/"> Terms and conditions </a> </li> </ul> </div> <div> <p class="mb-6 font-bold"> Social, environmental and compliance </p> <ul class="g-footer__menu md:pr-4 lg:-mt-1" role="menu"> <li role="menuitem"> <a class="block pb-3 text-red hover:underline focus:underline hover:text-red focus:text-red" href="https://ioppublishing.org/legal/environmental-policy/"> Environmental policy </a> </li> <li role="menuitem"> <a class="block pb-3 text-red hover:underline focus:underline hover:text-red focus:text-red" href="https://ioppublishing.org/wp-content/uploads/2024/06/D-COR-BK-0524-Gender-Pay-Gap-2023-4-1.pdf"> Gender Pay Gap Report </a> </li> <li role="menuitem"> <a class="block pb-3 text-red hover:underline focus:underline hover:text-red focus:text-red" href="https://www.iop.org/anti-slavery-and-human-trafficking-statement-financial-year-ending-31-december-2022#gref"> Modern Slavery policy </a> </li> <li role="menuitem"> <a class="block pb-3 text-red hover:underline focus:underline hover:text-red focus:text-red" href="https://ioppublishing.org/sustainable-development-goals/"> Sustainable Development Goals </a> </li> <li role="menuitem"> <a class="block pb-3 text-red hover:underline focus:underline hover:text-red focus:text-red" href="https://ioppublishing.org/legal/supplier-sustainability-code-of-conduct/"> Supplier Sustainability Code of Conduct </a> </li> </ul> </div> <div> <p class="mb-6 font-bold"> Our Company </p> <ul class="g-footer__menu md:pr-4 lg:-mt-1" role="menu"> <li role="menuitem"> <a class="block pb-3 text-red hover:underline focus:underline hover:text-red focus:text-red" href="https://ioppublishing.org/about-us/contact-us/"> Contact us </a> </li> <li role="menuitem"> <a class="block pb-3 text-red hover:underline focus:underline hover:text-red focus:text-red" href="https://www.ioppublishingcareers.org/current-vacancies.html"> Current vacancies </a> </li> <li role="menuitem"> <a class="block pb-3 text-red hover:underline focus:underline hover:text-red focus:text-red" href="https://ioppublishing.org/work-for-us/"> Work with us </a> </li> </ul> </div> </div> <div class="mt-6 md:mt-10 lg:col-start-1 lg:col-span-12"> <div class="block"> <div class="flex justify-center md:justify-start"> <div class="c-social-list "> <ul class="flex flex-wrap items-center share-btn space-x-6 list-none lg:space-x-4"> <li> <a class="c-social-list__link flex-shrink-0 block p-2 text-white rounded-full w-10 h-10 lg:w-8 lg:h-8 lg:p-1.5" href="https://x.com/ioppublishing?lang=en" aria-label="x" target="_blank" rel="noopener noreferrer"> <svg xmlns="http://www.w3.org/2000/svg" width="50" height="50" class="w-full h-full"> <use xlink:href="/wp-content/themes/snap/dist/sprite3c04215a374871e6.svg#x"></use> </svg> </a> </li> <li> <a class="c-social-list__link flex-shrink-0 block p-2 text-white rounded-full w-10 h-10 lg:w-8 lg:h-8 lg:p-1.5" href="https://www.facebook.com/ioppublishing/" aria-label="facebook" target="_blank" rel="noopener noreferrer"> <svg xmlns="http://www.w3.org/2000/svg" width="50" height="50" class="w-full h-full"> <use xlink:href="/wp-content/themes/snap/dist/sprite3c04215a374871e6.svg#facebook"></use> </svg> </a> </li> <li> <a class="c-social-list__link flex-shrink-0 block p-2 text-white rounded-full w-10 h-10 lg:w-8 lg:h-8 lg:p-1.5" href="https://www.linkedin.com/company/iop-publishing" aria-label="linkedin" target="_blank" rel="noopener noreferrer"> <svg xmlns="http://www.w3.org/2000/svg" width="50" height="50" class="w-full h-full"> <use xlink:href="/wp-content/themes/snap/dist/sprite3c04215a374871e6.svg#linkedin"></use> </svg> </a> </li> <li> <a class="c-social-list__link flex-shrink-0 block p-2 text-white rounded-full w-10 h-10 lg:w-8 lg:h-8 lg:p-1.5" href="https://www.youtube.com/channel/UC6sGrQTcmY8NpmfGEfRqRrg" aria-label="youtube" target="_blank" rel="noopener noreferrer"> <svg xmlns="http://www.w3.org/2000/svg" width="50" height="50" class="w-full h-full"> <use xlink:href="/wp-content/themes/snap/dist/sprite3c04215a374871e6.svg#youtube"></use> </svg> </a> </li> <li> <a class="c-social-list__link flex-shrink-0 block p-2 text-white rounded-full w-10 h-10 lg:w-8 lg:h-8 lg:p-1.5" href="https://ioppublishing.org/wp-content/uploads/2020/11/WeChat-QR-Code.png" aria-label="wechat" target="_blank" rel="noopener noreferrer"> <svg xmlns="http://www.w3.org/2000/svg" width="50" height="50" class="w-full h-full"> <use xlink:href="/wp-content/themes/snap/dist/sprite3c04215a374871e6.svg#wechat"></use> </svg> </a> </li> <li> <a class="c-social-list__link flex-shrink-0 block p-2 text-white rounded-full w-10 h-10 lg:w-8 lg:h-8 lg:p-1.5" href="https://www.weibo.com/u/2931886367" aria-label="weibo" target="_blank" rel="noopener noreferrer"> <svg xmlns="http://www.w3.org/2000/svg" width="50" height="50" class="w-full h-full"> <use xlink:href="/wp-content/themes/snap/dist/sprite3c04215a374871e6.svg#weibo"></use> </svg> </a> </li> </ul> </div> </div> </div> <div class="mt-12 md:flex md:justify-between md:items-end"> <div class="g-footer__logo mx-auto md:mx-0"> <svg xmlns="http://www.w3.org/2000/svg" width="132" height="21" class="w-32 h-auto fill-black"> <use xlink:href="/wp-content/themes/snap/dist/sprite3c04215a374871e6.svg#logo-iopp-black"></use> </svg> </div> <div class="md:pr-8"> </div> </div> </div> </div> </div> </div> </footer> <div class="c-cookie-banner fixed pointer-events-none h-screen w-full flex flex-col top-0 z-30"> <div id="cookies-eu-banner" style="display: none;" class="c-cookie-banner__main bg-red pointer-events-auto mt-auto py-3 sm:py-4" data-behaviour="cookie-banner" data-ga-id="" data-gtm-id=""> <div class="container"> <div class="lg:flex lg:items-center"> <div class="c-cookie-banner__text font-normal text-16 leading-22 text-center mb-4 px-2 lg:pl-0 lg:mb-0 lg:pr-8 lg:text-left"> <p> We use cookies to ensure that we give you the best experience on our website. Continued use of our website confirms acceptance of our necessary cookies. </p> </div> <div class="c-cookie-banner__buttons mx-auto space-y-3 sm:space-y-0 sm:flex sm:justify-center sm:-mx-4 lg:ml-auto lg:mr-0 lg:items-start lg:justify-end sm:space-x-4"> <button class="c-cookie-banner__button c-btn c-btn--on-dark" id="cookies-eu-accept">Accept</button> <button class="c-cookie-banner__button c-btn c-btn--on-dark c-btn--secondary" id="cookies-eu-reject"> Reject </button> <a class="c-cookie-banner__button c-btn c-btn--on-dark c-btn--secondary" href="https://ioppublishing.org/legal/privacy-cookies-policy/" id="cookies-eu-more"> Read more </a> </div> </div> </div> </div> </div>  <div class="pswp" tabindex="-1" role="dialog" aria-hidden="true">  <div class="pswp__bg bg-black"></div>  <div class="pswp__scroll-wrap">  <div class="pswp__container"> <div class="pswp__item"></div> <div class="pswp__item"></div> <div class="pswp__item"></div> </div>  <div class="pswp__ui pswp__ui--hidden"> <div class="pswp__top-bar">  <div class="pswp__counter"></div>   <div class="pswp__preloader ml-auto"> <div class="pswp__preloader__icn"> <div class="pswp__preloader__cut"> <div class="pswp__preloader__donut"></div> </div> </div> </div> <div class="flex ml-auto"> <button class="pswp__button pswp__button--zoom" title="Zoom in/out"> <svg xmlns="http://www.w3.org/2000/svg" width="50" height="50" class="c-gallery__icon c-gallery__icon--in w-6 h-6 text-white pointer-events-none"> <use xlink:href="/wp-content/themes/snap/dist/sprite3c04215a374871e6.svg#icon-gallery-zoom-in"></use> </svg> <svg xmlns="http://www.w3.org/2000/svg" width="50" height="50" class="c-gallery__icon c-gallery__icon--out w-6 h-6 text-white pointer-events-none"> <use xlink:href="/wp-content/themes/snap/dist/sprite3c04215a374871e6.svg#icon-gallery-zoom-out"></use> </svg> </button> <button class="pswp__button pswp__button--close p-2 flex justify-end items-center text-white font-bold" title="Close (Esc)"> Close <svg xmlns="http://www.w3.org/2000/svg" width="50" height="50" class="c-gallery__icon c-gallery__icon--close w-6 h-6 pointer-events-none origin center ml-2"> <use xlink:href="/wp-content/themes/snap/dist/sprite3c04215a374871e6.svg#icon-plus-close"></use> </svg> </button> </div> </div> <div class="pswp__share-modal pswp__share-modal--hidden pswp__single-tap"> <div class="pswp__share-tooltip"></div> </div> <button class="pswp__button pswp__button--arrow--left" title="Previous (arrow left)" type="button"> <svg xmlns="http://www.w3.org/2000/svg" width="50" height="50" class="w-6 h-6 pointer-events-none text-white"> <use xlink:href="/wp-content/themes/snap/dist/sprite3c04215a374871e6.svg#icon-chevron-left"></use> </svg> </button> <button class="pswp__button pswp__button--arrow--right" title="Next (arrow right)" type="button"> <svg xmlns="http://www.w3.org/2000/svg" width="50" height="50" class="w-6 h-6 pointer-events-none text-white"> <use xlink:href="/wp-content/themes/snap/dist/sprite3c04215a374871e6.svg#icon-chevron-left"></use> </svg> </button> <div class="pswp__caption" data-caption> <div class="pswp__caption__center text-16 leading-22 text-white"></div> </div> </div> </div> </div>  <script type="text/javascript"> /* <![CDATA[ */ var relevanssi_rt_regex = /(&|\?)_(rt|rt_nonce)=(\w+)/g var newUrl = window.location.search.replace(relevanssi_rt_regex, '') history.replaceState(null, null, window.location.pathname + newUrl + window.location.hash) /* ]]> */ </script> <style id='core-block-supports-inline-css' type='text/css'> .wp-container-core-group-is-layout-2 > .alignfull{margin-right:calc(0px * -1);margin-left:calc(0px * -1);} </style> <script type="text/javascript" id="eio-lazy-load-js-before"> /* <![CDATA[ */ var eio_lazy_vars = {"exactdn_domain":"","skip_autoscale":0,"threshold":0}; /* ]]> */ </script> <script type="text/javascript" defer src="https://ioppublishing.org/wp-content/plugins/ewww-image-optimizer/includes/lazysizes.min.js?ver=702" id="eio-lazy-load-js"></script> <script type="text/javascript" defer src="https://ioppublishing.org/wp-content/plugins/chart-builder/public/js/google-chart.js?ver=20.0.8.1" id="chart-builder-charts-google-js"></script> <script type="text/javascript" defer src="https://ioppublishing.org/wp-content/plugins/chart-builder/public/js/export/CSVExport.js?ver=20.0.8.1" id="chart-builder-CSVExport.js-js"></script> <script type="text/javascript" defer src="https://ioppublishing.org/wp-content/plugins/chart-builder/public/js/export/xlsx.core.min.js?ver=20.0.8.1" id="chart-builder-xlsx.core.min.js-js"></script> <script type="text/javascript" defer src="https://ioppublishing.org/wp-content/plugins/chart-builder/public/js/export/FileSaver.js?ver=20.0.8.1" id="chart-builder-fileSaver.js-js"></script> <script type="text/javascript" defer src="https://ioppublishing.org/wp-content/plugins/chart-builder/public/js/export/jhxlsx.js?ver=20.0.8.1" id="chart-builder-jhxlsx.js-js"></script> <script type="text/javascript" defer src="https://ioppublishing.org/wp-content/plugins/lazy-load-for-videos/public/js/lazyload-shared.js?ver=2.18.3" id="lazyload-video-js-js"></script> <script type="text/javascript" id="lazyload-youtube-js-js-before"> /* <![CDATA[ */ window.llvConfig=window.llvConfig||{};window.llvConfig.youtube={"colour":"red","buttonstyle":"default","controls":true,"loadpolicy":true,"thumbnailquality":"sddefault","preroll":"","postroll":"","overlaytext":"","loadthumbnail":true,"cookies":false,"callback":""}; /* ]]> */ </script> <script type="text/javascript" defer src="https://ioppublishing.org/wp-content/plugins/lazy-load-for-videos/public/js/lazyload-youtube.js?ver=2.18.3" id="lazyload-youtube-js-js"></script> <script type="text/javascript" id="lazyload-vimeo-js-js-before"> /* <![CDATA[ */ window.llvConfig=window.llvConfig||{};window.llvConfig.vimeo={"buttonstyle":"default","playercolour":"#00adef","preroll":"","postroll":"","show_title":false,"overlaytext":"","loadthumbnail":true,"thumbnailquality":"medium","cookies":false,"callback":""}; /* ]]> */ </script> <script type="text/javascript" defer src="https://ioppublishing.org/wp-content/plugins/lazy-load-for-videos/public/js/lazyload-vimeo.js?ver=2.18.3" id="lazyload-vimeo-js-js"></script> <script type="text/javascript" defer src="https://ioppublishing.org/wp-content/themes/snap/dist/index.cb5867629defb01af802bbbc42ba09dd.js" id="init-js"></script> <script type="text/javascript"> window.didomiOnReady = window.didomiOnReady || []; window.didomiOnReady.push(function (Didomi) { // Call other functions on the SDK }); </script> <script type="didomi/javascript" data-vendor="c:pardot"> piAId = '970933'; piCId = '1150'; piHostname = 'pi.pardot.com'; (function() { function async_load(){ var s = document.createElement('script'); s.type = 'text/javascript'; s.src = ('https:' == document.location.protocol ? 'https://pi' : 'http://cdn') + '.pardot.com/pd.js'; var c = document.getElementsByTagName('script')[0]; c.parentNode.insertBefore(s, c); } if(window.attachEvent) { window.attachEvent('onload', async_load); } else { window.addEventListener('load', async_load, false); } })(); </script> </body> </html>