86 Score / 100

A · Very good

Page SEO Inspection

https://jamiesomers.com/

Crawled 14 Nov, 03:20 UTC (33 min ago)

HTTP 200 105 KB 520 ms TTFB

On-Page Checklist 76% Complete

Primary focus: The first image is lazy-loaded. If it is the largest contentful paint element, this directly delays LCP. Fix now →

Full diagnostics

Every check that ran, grouped by what it affects. Problems appear first in each group.

Meta Tags & Search Snippet Simulator

The tags that decide how this page is titled and described in search results.

✓ 2100% · excellent

Live snippet simulation

Title width: 485px / 580px

J Jamie Somers jamiesomers.com

Jamie Somers | PhD in Physics | Trinity College Dublin

Jamie Somers is a Scientist and Physics PhD Student at Trinity College Dublin. He works in the Bradley Photonics Group in the area of Nanophotonics.

Title tag 485px of 580px

The title length is well judged.

Rendered width

Desktop		485px	/ 580px
Mobile		436px	/ 920px

Measured in Arial at the size Google renders result titles, accurate to within a fraction of a percent of a browser. Characters: 54.

Meta description 148 characters

The meta description length is well judged.

Crawling & indexing

Whether search engines can reach, read and index this page at all.

✓ 17100% · excellent

HTTP status HTTP 200

The page returns 200 OK.

Redirect chain

The URL resolves without redirects.

Robots directives

No directive prevents indexing.

Canonical tag

The canonical correctly references this page.

https://jamiesomers.com

Language

Language is declared as "en".

lang="en"

hreflang

No hreflang annotations, which is correct for a single-language page.

Viewport

The viewport is configured for mobile.

width=device-width,initial-scale=1,maximum-scale=10

Character encoding

The page declares UTF-8 encoding.

Favicon

A favicon is declared.

Mixed content

All resources load securely.

URL length 24 characters

The URL is 24 characters.

URL readability

The URL is clean and readable.

URL depth 0 levels deep

The page is 0 levels deep.

URL parameters

The URL has no query parameters.

robots.txt 0 KB

robots.txt is present and does not block crawling.

XML sitemap 63 URLs

A sitemap is published, listing 63 URLs.

Lists 63 URLs

Missing pages (404) HTTP 404

A page that does not exist returns HTTP 404, so search engines drop dead addresses.

www and https versions 3 checked

All 3 other spellings of this address redirect here in one permanent step.

Content & metadata

What the page says it is about, and how it reads.

i 1✓ 1091% · excellent

Word count 816 Substantive

Headings 16 Structured

H1 tags 1 Exactly one

Text ratio 5.6% Text vs markup

Heading outline 16 headings

H1 Jamie Somers Scientist

H2 AMBER Centre

H3 Something's Missing II About Me Explore Blog Explore CV Explore Contact Explore Lab Repor…

H2 Publications

H3 01

H3 JUNE, 2026

H3 08

H3 APRIL, 2026

H2 Articles

H3 Bioengineered Solutions to Medical Challenges – Discovery to Deployment

H3 +5

H2 Videos

H3 Something's Missing

H3 +1

Twitter card

No twitter:card tag, so shared links render as a small preview.

How to fix

<meta name="twitter:card" content="summary_large_image">

Open Graph tags

Open Graph tags are present.

H1 tag

The page has exactly one h1.

Jamie Somers Scientist

Heading hierarchy

The heading outline descends in order.

Content length 816 words

The page has roughly 816 words.

Text-to-HTML ratio 5.6% text

Text is 5.6% of the page source.

Table headers

No data tables on this page, so there are no columns to label.

Keyword placement

The page's prominent terms appear in its title, description or headings.

Where these terms appear

Term	Count	Density	Title	Description	Headings
jamie	16	2.70%	✓	✓	✓
research	13	2.20%	✕	✕	✕
college	12	2.03%	✓	✓	✕
somers	11	1.86%	✓	✓	✓
dublin	10	1.69%	✓	✓	✕

Keyword repetition

No term is repeated unnaturally often.

Keyword cloud

The page's most frequent terms, from 592 words of content.

What this page is about

Term size reflects how often it appears. Density is not a ranking factor, this is a view of the page's subject, not a target to hit.

jamieresearchcollegesomersdublinuniversitylasercentreexploreopticsopentrinitylondonamberreadspectroscopyphotonicbackpublicationsexpressdirectwritinginstituteirishwebsitephysicsimperialdoctoralstructuresmaterialsinternationalsomethingmissingreportssuperimposedgratingsopticametamaterialsspectrochimicaacta

Share image 1920 × 993 px

The share image loads and is 1920 × 993 pixels, the right size and shape for a large card.

AI & answer readiness

Whether answer engines and AI overviews can extract and trust this page.

i 4✓ 660% · fair

AI crawlers 10/10 All allowed

Readable without JS Yes Served complete

Identity 1/2 Partly declared

Quotable signals 2/4 Schema, date, author, answers

Answer readiness 0 found

No heading is followed by a concise 40 to 60 word answer, the shape featured snippets and AI overviews extract.

How to fix

Open at least one section with a direct 40 to 60 word answer to the question its heading poses.

Answer schema

No structured data an answer engine can lift directly, such as FAQPage, HowTo or Article.

How to fix

Mark up question-and-answer content as FAQPage, or step-by-step content as HowTo.

Page subject

No structured data describes what this page is about.

Found: WebSite, Person, ScholarlyArticle, Organization
None of these declare the page's subject.

4 types: WebSite, Person, ScholarlyArticle, Organization

How to fix

Describe the page with the type that fits it, Article for writing, Product for a product, FAQPage for questions and answers. Boilerplate like Organization and BreadcrumbList identifies the site, not the page.

llms.txt for AI agents

No llms.txt. AI coding agents have no curated map of this site.

https://jamiesomers.com/llms.txt returned nothing

How to fix

A markdown file at /llms.txt listing your most useful pages with one-line descriptions. It does not affect how AI assistants cite you in answers, and nobody has shown that it does. What it helps is agents reading your documentation directly: Anthropic supports it, Perplexity uses it to choose pages, and Cursor, Continue and Cline navigate docs with it. Worth doing for a documentation or API site, and safe to skip otherwise.

Content freshness

The page is dated and about -1 days old.

datePublished in structured data

Attribution

Attribution signals present: author in structured data, publisher in structured data, author meta tag, about page.

author in structured data, publisher in structured data, author meta tag

Extractable structure 816 words

816 words across 16 headings, 1 lists and 0 tables.

Publisher identity

The page names who is behind it: Jamie Somers, Optica Publishing Group.

Readable without JavaScript

The page reads the same with and without JavaScript.

AI crawler access 10 checked

Every AI crawler checked is allowed to read this page.

Speed & delivery

What makes the page slow, and what the loading experience measures.

i 1✓ 1091% · excellent

Rendered page

Not captured

Mobile, not captured for this report

The page as it rendered on a desktop viewport — **Desktop**, measured

LCPNo data

n/a

Largest Contentful Paint

Target ≤ 2.5s

Needs real-user data from Chrome UX Report

INPNo data

n/a

Interaction to Next Paint

Target ≤ 200ms

Needs real-user data from Chrome UX Report

CLS Good

0.001

Cumulative Layout Shift

Target ≤ 0.1

What this measures

How much visible content jumps around while the page loads. This is what makes someone tap the wrong thing because a banner or image pushed the layout down underneath their finger.

What moves it: Give images and video explicit width and height so the browser reserves the space, reserve room for ads and embeds, and avoid inserting content above what is already on screen.

FCP Good

0.96s

First Contentful Paint

Target ≤ 1.8s

What this measures

How long until anything at all appears, the first text or image painted. It separates "the page starts slowly" from "the biggest element is slow": a fast FCP with a slow LCP points at the hero, while both slow points at the server.

What moves it: Cut render-blocking CSS and JavaScript in the head, inline the styles needed for the first screen, and improve the server response time.

TTFBNo data

n/a

Real-user response time

Target ≤ 800ms

Needs real-user data from Chrome UX Report

Inline styles 120 found

120 elements carry inline style attributes, which cannot be cached and inflate the document.

How to fix

Move repeated styles into a cacheable stylesheet.

Time to first byte

Time to first byte is 520 ms.

Render-blocking resources 1 found

1 render-blocking resource in the head.

HTML size 105 KB

The HTML document is 105 KB.

Deprecated tags

No deprecated HTML tags are used.

Compression

The response is compressed with zstd.

Content-Encoding: zstd

Page weight 42 requests · 1.7 MB

The page loads 42 requests totalling 1.7 MB.

What loaded, by type

Type	Requests	Transferred
image	17of 34 declared	1.1 MB
font	5	351 KB
script	5	238 KB
document	1	18 KB
other	12	9 KB
stylesheet	1of 0 declared	9 KB
media	1	0 KB

Of these, 12 requests (22 KB) come from third-party domains. The HTML declares 34 images but only 17 loaded, the rest are lazy-loaded and fetched when scrolled to.

Third-party services 4 services · 19 KB

4 third-party services load on this page, adding 19 KB.

Third-party services

Service	Transferred	Main thread
Cloudflare	10 KB	13ms
Google/Doubleclick Ads	6 KB	2ms
Other Google APIs/SDKs	2 KB	under 1ms
Google Tag Manager	1 KB	under 1ms

0.0s of main-thread time

Browser caching 4 KB re-downloaded

Cache lifetimes are long enough that a returning visitor re-downloads only 4 KB.

Short cache lifetimes

File	Cache lifetime	Size
static.cloudflareinsights.com/…823e78c4301a35b7e07294d87301792088814092	1d	10 KB

Security

Transport security, reputation and the response headers that protect visitors.

! 2i 6✓ 643% · needs work

HSTS

No Strict-Transport-Security header, so a first visit over HTTP can be intercepted before the redirect.

How to fix

Strict-Transport-Security: max-age=31536000; includeSubDomains

Clickjacking protection

Nothing prevents this page being embedded in a frame, which allows clickjacking.

How to fix

Content-Security-Policy: frame-ancestors 'self'

MIME sniffing

No X-Content-Type-Options header, so browsers may guess a resource type and execute it.

How to fix

X-Content-Type-Options: nosniff

Referrer policy

No Referrer-Policy header, so full URLs may leak to third-party sites.

How to fix

Referrer-Policy: strict-origin-when-cross-origin

Content Security Policy

No Content-Security-Policy, the main defence against cross-site scripting.

How to fix

Content-Security-Policy: default-src 'self'

Permissions policy

No Permissions-Policy header, so any script or embed on the page may ask for the camera, microphone or location.

How to fix

Permissions-Policy: camera=(), microphone=(), geolocation=()

TLS version

The server still accepts TLS 1.0 or 1.1, retired in 2021. No current browser uses them, so they serve only very old clients and attackers forcing a weaker connection.

How to fix

Disable TLS 1.0 and 1.1 and keep 1.2 and 1.3. On a CDN this is usually a "minimum TLS version" setting.

security.txt

No security.txt, so somebody who finds a vulnerability has no published way to tell you about it.

https://jamiesomers.com/.well-known/security.txt

How to fix

Publish /.well-known/security.txt with a Contact: line (an email address or a form) and an Expires: date.

Email addresses in the page

No email addresses are written into the page for harvesting bots to collect.

Cookie flags

The page sets no cookies, so there are none to expose.

Version disclosure

No software versions are disclosed in headers or the page.

TLS certificate 32 days left

The TLS certificate is valid for another 32 days, issued by Google Trust Services.

32 days remaining

Google Web Risk

Not listed by Google Web Risk for malware, phishing or unwanted software.

TLS version TLS 1.3

Connections use TLS 1.3.

Server & domain

The server and the domain behind the page: protocol, network, registration and email records.

i 1✓ 788% · good

DMARC policy

The DMARC policy for jamiesomers.com is p=none, which collects reports but does not stop mail that spoofs the domain.

v=DMARC1; p=none; adkim=r; aspf=r

How to fix

Once the reports show only your own services sending, move to p=quarantine and then p=reject.

HTTP/2 HTTP/2

Served over HTTP/2, which loads a page's files in parallel over one connection.

HTTP/3 HTTP/3

Announces HTTP/3, which browsers switch to on a later visit for faster connections on poor networks.

CDN Cloudflare

Served through Cloudflare, a CDN, so visitors get the page from a server near them.

Domain expiry 209 days left

jamiesomers.com is registered until 12 Jun 2027 with Register SPA.

209 days remaining

Domain age 5 years old

jamiesomers.com was registered on 12 Jun 2021, 5 years ago. Age is not a ranking factor, but an established name is one buyers and partners look for.

IPv6

jamiesomers.com has an IPv6 address, so IPv6-only networks reach it directly.

SPF record

jamiesomers.com publishes an SPF record: v=spf1 include:spf.reg365.net ~all

ads.txt

No ad network loads on this page, so ads.txt is not needed.

Links, media & schema

Links, images and structured data.

! 6✓ 754% · fair

Social share preview From this page's Open Graph tags

Anchor text 1 found

1 link has no anchor text, so its purpose is unreadable without sight of the layout.

# / line	Link
JS	https://jamiesomers.com/citi-completion-certificate-1118123748935560.pdf`<a target="_blank" href="https://jamiesomers.com/citi-completion-certificate-1118123748935560.pdf"><br> <br> </a>`

How to fix

Add link text, or an aria-label where the link is an icon.

Image dimensions 34 found

34 images have no width and height, so the page shifts as they load (hurting CLS).

Shown as 23 unique sources; the counts show how often each repeats.

Line	Image source
406	/imgs/Orcidsocial.webp`<img loading="lazy" src="/imgs/Orcidsocial.webp" alt="ORCID icon">`
407	/imgs/scholarsocial.webp`<img title="Jamie Somers" loading="lazy" src="/imgs/scholarsocial.webp" alt="Google Scholar icon">`
408	/imgs/researchsocial.webp`<img loading="lazy" src="/imgs/researchsocial.webp" alt="ResearchGate icon">`
409	/imgs/researchersocial.webp`<img loading="lazy" src="/imgs/researchersocial.webp" alt="Web of Science icon">`
410	/imgs/linkedinsocial.webp`<img loading="lazy" src="/imgs/linkedinsocial.webp" alt="Linkedin icon">`
411	/imgs/twittersocial.webp`<img loading="lazy" src="/imgs/twittersocial.webp" alt="Twitter icon">`
412	/imgs/githubsocial.webp`<img loading="lazy" src="/imgs/githubsocial.webp" alt="Github icon">`
413	/imgs/instagramsocial.webp`<img loading="lazy" src="/imgs/instagramsocial.webp" alt="Instagram icon">`
414	/imgs/youtubesocial.webp`<img loading="lazy" src="/imgs/youtubesocial.webp" alt="Youtube icon">`
431, 445, 459…	/imgs/arrow-down.svg ×12`<img loading="lazy" src="/imgs/arrow-down.svg" alt="Down Arrow" style=" width: 15px; height: 15px;filter: invert(1); ">`
510	https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/Gordon-Wallace.webp`<img alt="Blog Thumbnail" loading="lazy" src="https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/Gordon-Wallace.webp" style="--i:1.3;--j:1.5" id="ArticleImage2">`
520	https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/Raymond.webp`<img alt="Blog Thumbnail" loading="lazy" src="https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/Raymond.webp" style="--i:1.5;--j:1.5" id="ArticleImage2">`
529	https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/20ddd864cd7ed084154c711f737268402fab436e-3600x2400.webp`<img alt="Blog Thumbnail" loading="lazy" src="https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/20ddd864cd7ed084154c711f737268402fab436e-3600x2400.webp" style="--i:1.7;--j:1.5" id="ArticleImage2">`
538	https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/media_licdn_com-1662656446186.webp`<img alt="Blog Thumbnail" loading="lazy" src="https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/media_licdn_com-1662656446186.webp" style="--i:1.9;--j:1.5" id="ArticleImage2">`
547	https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/photo-1573867639040-6dd25fa5f597.webp`<img alt="Blog Thumbnail" loading="lazy" src="https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/photo-1573867639040-6dd25fa5f597.webp" style="--i:2.1;--j:1.5" id="ArticleImage2">`
557	https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/laue-diffraction.webp`<img alt="Blog Thumbnail" loading="lazy" src="https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/laue-diffraction.webp" style="--i:2.3;--j:1.5" id="ArticleImage2">`
566	https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/201802-030_10.webp`<img alt="Blog Thumbnail" loading="lazy" src="https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/201802-030_10.webp" style="--i:2.5;--j:1.5" id="ArticleImage2">`
575	https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/creating-and-hosting-a-website-using-a-raspberry-pi.webp`<img alt="Blog Thumbnail" loading="lazy" src="https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/creating-and-hosting-a-website-using-a-raspberry-pi.webp" style="--i:2.7;--j:1.5" id="ArticleImage2">`
591	https://jamiesomers.com/cdn-cgi/image/width=65,height=65,dpr=2/imgs/Raymond.webp`<img fetchpriority="high" src="https://jamiesomers.com/cdn-cgi/image/width=65,height=65,dpr=2/imgs/Raymond.webp" id="ArticleThumbnail" onclick="articles()" alt="Image of Molecule">`
592	https://jamiesomers.com/cdn-cgi/image/width=65,height=65,dpr=2/imgs/20ddd864cd7ed084154c711f737268402fab436e-3600x2400.webp`<img fetchpriority="high" src="https://jamiesomers.com/cdn-cgi/image/width=65,height=65,dpr=2/imgs/20ddd864cd7ed084154c711f737268402fab436e-3600x2400.webp" id="ArticleThumbnail" onclick="articles()" alt="Image of Molecule">`
612	https://jamiesomers.com/cdn-cgi/image/width=731,height=426.19,dpr=2/imgs/Somethings-Missing-thumbnail.webp`<img src="https://jamiesomers.com/cdn-cgi/image/width=731,height=426.19,dpr=2/imgs/Somethings-Missing-thumbnail.webp" alt="video thumbnail" style="--i:1.1;--j:1.5" id="VideosImage1">`
627	https://jamiesomers.com/cdn-cgi/image/width=102,height=72.38,dpr=2/imgs/Jamie-Somers-Background3.webp`<img loading="lazy" alt="video thumbnail" src="https://jamiesomers.com/cdn-cgi/image/width=102,height=72.38,dpr=2/imgs/Jamie-Somers-Background3.webp" style="--i:1.2;--j:1.5" id="VideosImage2">`
644	https://jamiesomers.com/cdn-cgi/image/width=177.77,height=100,dpr=1/imgs/Somethings-Missing-thumbnail.webp`<img src="https://jamiesomers.com/cdn-cgi/image/width=177.77,height=100,dpr=1/imgs/Somethings-Missing-thumbnail.webp" id="Thumbnail" alt="Youtube">`

How to fix

<img src="…" width="800" height="600">, the browser reserves the space before decoding.

Image loading

The first image is lazy-loaded. If it is the largest contentful paint element, this directly delays LCP.

<img src="/imgs/Orcidsocial.webp" loading="lazy">

How to fix

Remove loading="lazy" from the hero image and add fetchpriority="high".

Image loading 12 found

12 images below the fold load eagerly, competing for bandwidth with the visible page.

Shown as 5 unique sources; the counts show how often each repeats.

Line	Image source
517, 526, 535…	/imgs/arrow-down.svg ×8`<img src="/imgs/arrow-down.svg" alt="Down Arrow" style=" width: 15px; height: 15px;filter: invert(1); ">`
591	https://jamiesomers.com/cdn-cgi/image/width=65,height=65,dpr=2/imgs/Raymond.webp`<img fetchpriority="high" src="https://jamiesomers.com/cdn-cgi/image/width=65,height=65,dpr=2/imgs/Raymond.webp" id="ArticleThumbnail" onclick="articles()" alt="Image of Molecule">`
592	https://jamiesomers.com/cdn-cgi/image/width=65,height=65,dpr=2/imgs/20ddd864cd7ed084154c711f737268402fab436e-3600x2400.webp`<img fetchpriority="high" src="https://jamiesomers.com/cdn-cgi/image/width=65,height=65,dpr=2/imgs/20ddd864cd7ed084154c711f737268402fab436e-3600x2400.webp" id="ArticleThumbnail" onclick="articles()" alt="Image of Molecule">`
612	https://jamiesomers.com/cdn-cgi/image/width=731,height=426.19,dpr=2/imgs/Somethings-Missing-thumbnail.webp`<img src="https://jamiesomers.com/cdn-cgi/image/width=731,height=426.19,dpr=2/imgs/Somethings-Missing-thumbnail.webp" alt="video thumbnail" style="--i:1.1;--j:1.5" id="VideosImage1">`
644	https://jamiesomers.com/cdn-cgi/image/width=177.77,height=100,dpr=1/imgs/Somethings-Missing-thumbnail.webp`<img src="https://jamiesomers.com/cdn-cgi/image/width=177.77,height=100,dpr=1/imgs/Somethings-Missing-thumbnail.webp" id="Thumbnail" alt="Youtube">`

How to fix

Add loading="lazy" to images below the first screen.

Responsive images 34 found

34 large images are served at one fixed size, so phones download desktop-sized files.

Shown as 23 unique sources; the counts show how often each repeats.

Line	Image source
406	/imgs/Orcidsocial.webp`<img loading="lazy" src="/imgs/Orcidsocial.webp" alt="ORCID icon">`
407	/imgs/scholarsocial.webp`<img title="Jamie Somers" loading="lazy" src="/imgs/scholarsocial.webp" alt="Google Scholar icon">`
408	/imgs/researchsocial.webp`<img loading="lazy" src="/imgs/researchsocial.webp" alt="ResearchGate icon">`
409	/imgs/researchersocial.webp`<img loading="lazy" src="/imgs/researchersocial.webp" alt="Web of Science icon">`
410	/imgs/linkedinsocial.webp`<img loading="lazy" src="/imgs/linkedinsocial.webp" alt="Linkedin icon">`
411	/imgs/twittersocial.webp`<img loading="lazy" src="/imgs/twittersocial.webp" alt="Twitter icon">`
412	/imgs/githubsocial.webp`<img loading="lazy" src="/imgs/githubsocial.webp" alt="Github icon">`
413	/imgs/instagramsocial.webp`<img loading="lazy" src="/imgs/instagramsocial.webp" alt="Instagram icon">`
414	/imgs/youtubesocial.webp`<img loading="lazy" src="/imgs/youtubesocial.webp" alt="Youtube icon">`
431, 445, 459…	/imgs/arrow-down.svg ×12`<img loading="lazy" src="/imgs/arrow-down.svg" alt="Down Arrow" style=" width: 15px; height: 15px;filter: invert(1); ">`
510	https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/Gordon-Wallace.webp`<img alt="Blog Thumbnail" loading="lazy" src="https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/Gordon-Wallace.webp" style="--i:1.3;--j:1.5" id="ArticleImage2">`
520	https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/Raymond.webp`<img alt="Blog Thumbnail" loading="lazy" src="https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/Raymond.webp" style="--i:1.5;--j:1.5" id="ArticleImage2">`
529	https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/20ddd864cd7ed084154c711f737268402fab436e-3600x2400.webp`<img alt="Blog Thumbnail" loading="lazy" src="https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/20ddd864cd7ed084154c711f737268402fab436e-3600x2400.webp" style="--i:1.7;--j:1.5" id="ArticleImage2">`
538	https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/media_licdn_com-1662656446186.webp`<img alt="Blog Thumbnail" loading="lazy" src="https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/media_licdn_com-1662656446186.webp" style="--i:1.9;--j:1.5" id="ArticleImage2">`
547	https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/photo-1573867639040-6dd25fa5f597.webp`<img alt="Blog Thumbnail" loading="lazy" src="https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/photo-1573867639040-6dd25fa5f597.webp" style="--i:2.1;--j:1.5" id="ArticleImage2">`
557	https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/laue-diffraction.webp`<img alt="Blog Thumbnail" loading="lazy" src="https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/laue-diffraction.webp" style="--i:2.3;--j:1.5" id="ArticleImage2">`
566	https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/201802-030_10.webp`<img alt="Blog Thumbnail" loading="lazy" src="https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/201802-030_10.webp" style="--i:2.5;--j:1.5" id="ArticleImage2">`
575	https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/creating-and-hosting-a-website-using-a-raspberry-pi.webp`<img alt="Blog Thumbnail" loading="lazy" src="https://jamiesomers.com/cdn-cgi/image/width=77,height=77,dpr=2/imgs/creating-and-hosting-a-website-using-a-raspberry-pi.webp" style="--i:2.7;--j:1.5" id="ArticleImage2">`
591	https://jamiesomers.com/cdn-cgi/image/width=65,height=65,dpr=2/imgs/Raymond.webp`<img fetchpriority="high" src="https://jamiesomers.com/cdn-cgi/image/width=65,height=65,dpr=2/imgs/Raymond.webp" id="ArticleThumbnail" onclick="articles()" alt="Image of Molecule">`
592	https://jamiesomers.com/cdn-cgi/image/width=65,height=65,dpr=2/imgs/20ddd864cd7ed084154c711f737268402fab436e-3600x2400.webp`<img fetchpriority="high" src="https://jamiesomers.com/cdn-cgi/image/width=65,height=65,dpr=2/imgs/20ddd864cd7ed084154c711f737268402fab436e-3600x2400.webp" id="ArticleThumbnail" onclick="articles()" alt="Image of Molecule">`
612	https://jamiesomers.com/cdn-cgi/image/width=731,height=426.19,dpr=2/imgs/Somethings-Missing-thumbnail.webp`<img src="https://jamiesomers.com/cdn-cgi/image/width=731,height=426.19,dpr=2/imgs/Somethings-Missing-thumbnail.webp" alt="video thumbnail" style="--i:1.1;--j:1.5" id="VideosImage1">`
627	https://jamiesomers.com/cdn-cgi/image/width=102,height=72.38,dpr=2/imgs/Jamie-Somers-Background3.webp`<img loading="lazy" alt="video thumbnail" src="https://jamiesomers.com/cdn-cgi/image/width=102,height=72.38,dpr=2/imgs/Jamie-Somers-Background3.webp" style="--i:1.2;--j:1.5" id="VideosImage2">`
644	https://jamiesomers.com/cdn-cgi/image/width=177.77,height=100,dpr=1/imgs/Somethings-Missing-thumbnail.webp`<img src="https://jamiesomers.com/cdn-cgi/image/width=177.77,height=100,dpr=1/imgs/Somethings-Missing-thumbnail.webp" id="Thumbnail" alt="Youtube">`

How to fix

<img src="hero.jpg" srcset="hero-400.jpg 400w, hero-800.jpg 800w" sizes="(max-width: 600px) 400px, 800px">

Broken links 25 checked

3 links on this page return an error. Visitors who follow them land on an error page.

403  https://scholar.google.com/citations?user=StcLIYEAAAAJ
403  https://www.researchgate.net/profile/Jamie-Somers
403  https://www.webofscience.com/wos/author/record/GON-6744-2022

How to fix

Update each link to its current destination, or remove it. For a page of your own that moved, add a redirect too.

Structured data

Structured data is valid: WebSite, Person, ScholarlyArticle, Organization.

WebSite, Person, ScholarlyArticle, Organization

4 types: WebSite, Person, ScholarlyArticle, Organization

Rich result eligibility

Eligible for rich results via Organization.

Organization

1 type: Organization

Link distribution 40 resources

20 internal and 20 external links.

20 internal, 20 external

20 internal, 20 external

Link rel attributes

Outbound link rel attributes look appropriate.

In-page anchors

In-page anchors resolve to real targets.

Image alt text

All images carry an alt attribute.

Image formats

No heavy legacy image formats found.

22 already in a modern format

What to fix first

Ranked by impact against effort, the top of this list buys the most for the least work.

! Recommended The first image is lazy-loaded. If it is the largest contentful paint element, this directly delays LCP.

Remove loading="lazy" from the hero image and add fetchpriority="high".

quick fix

! Recommended 34 images have no width and height, so the page shifts as they load (hurting CLS).

<img src="…" width="800" height="600">, the browser reserves the space before decoding.

quick fix

! Recommended 12 images below the fold load eagerly, competing for bandwidth with the visible page.

Add loading="lazy" to images below the first screen.

quick fix

! Recommended 1 link has no anchor text, so its purpose is unreadable without sight of the layout.

Add link text, or an aria-label where the link is an icon.

quick fix

! Recommended No Strict-Transport-Security header, so a first visit over HTTP can be intercepted before the redirect.

Strict-Transport-Security: max-age=31536000; includeSubDomains

quick fix

! Recommended Nothing prevents this page being embedded in a frame, which allows clickjacking.

Content-Security-Policy: frame-ancestors 'self'

quick fix

! Recommended 3 links on this page return an error. Visitors who follow them land on an error page.

Update each link to its current destination, or remove it. For a page of your own that moved, add a redirect too.

quick fix

! Recommended 34 large images are served at one fixed size, so phones download desktop-sized files.

moderate

· Notice No structured data describes what this page is about.

Describe the page with the type that fits it, Article for writing, Product for a product, FAQPage for questions and answers. Boilerplate like Organization and BreadcrumbList identifies the site, not the page.

quick fix

· Notice No heading is followed by a concise 40 to 60 word answer, the shape featured snippets and AI overviews extract.

Open at least one section with a direct 40 to 60 word answer to the question its heading poses.

moderate

· Notice No X-Content-Type-Options header, so browsers may guess a resource type and execute it.

X-Content-Type-Options: nosniff

quick fix

· Notice The server still accepts TLS 1.0 or 1.1, retired in 2021. No current browser uses them, so they serve only very old clients and attackers forcing a weaker connection.

Disable TLS 1.0 and 1.1 and keep 1.2 and 1.3. On a CDN this is usually a "minimum TLS version" setting.

quick fix

Score breakdown

How each area scored. Categories that could not be measured are excluded rather than counted as zero.

Indexability & Crawling40 checks · 10 issues

On-Page Content & Structure22 checks · 4 issues

Core Web Vitals11 checks · 1 issue

Schema & Rich Snippets2 checks · 0 issues

100

Media & Links11 checks · 6 issues

Overall scoreGrade A · 65/88 passed

Page SEO Inspection

PDF export is a paid feature

Analyse this page again?

Full diagnostics

Meta Tags & Search Snippet Simulator

Rendered width

Crawling & indexing

Content & metadata

Where these terms appear

What this page is about

AI & answer readiness

Speed & delivery

What loaded, by type

Third-party services

Short cache lifetimes

Security

Server & domain

Links, media & schema

What to fix first

Score breakdown

Analysing your page

Page SEO Inspection

Full diagnostics

Rendered width

Where these terms appear

What this page is about

What loaded, by type

Third-party services

Short cache lifetimes

Jamie Somers | PhD in Physics | Trinity College Dublin

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