aps.org Website Information

Daily Unique Visits: 1,020,674

Daily Page Views: 8,165,392

Income Per Day: $8,165

Estimated Value: $8,818,200

This website is located in United States and is using following IP address 149.28.1.10. See the complete list of popular websites hosted in United States.

aps.org is registered under .ORG top-level domain. Please check other sites in .ORG zone.

Website aps.org is using the following name servers:

ns-1087.awsdns-07.org
ns-1828.awsdns-36.co.uk
ns-456.awsdns-57.com
ns-713.awsdns-25.net

and is probably hosted by AMAZON-02 - Amazon.com, Inc., US. See the full list of other websites hosted by AMAZON-02 - Amazon.com, Inc., US.

The highest website aps.org position in Alexa rank database was 1484 and the lowest rank position was 1539. Current position of aps.org in Alexa rank database is 1493.

Desktop speed score of aps.org (60/100) is better than the results of 35.69% of other sites and shows that the page desktop performance can be improved.

Mobile usability score of aps.org (99/100) is better than the results of 79.46% of other sites and means that the page is mobile-friendly.

Mobile speed score of aps.org (46/100) is better than the results of 27.13% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

aps.org Alexa Rank

The traffic rank is based on three months of aggregated historical traffic data from millions of Alexa Toolbar users and is a combined measure of page views and users.

aps.org whois

WHOIS gives you the ability to lookup any generic domains to find out the registered domain holder. WHOIS database are provided for information purposes only. It allows the public to check whether a specific domain name is still available or not and to obtain information related to the registration records of existing domain names.

Domain Name: APS.ORG
Registry Domain ID: D205429-LROR
Registrar WHOIS Server: whois.domain.com
Registrar URL: www.domain.com
Updated Date: 2020-02-20T16:50:53Z
Creation Date: 1991-08-27T04:00:00Z
Registry Expiry Date: 2025-08-26T04:00:00Z
Registrar Registration Expiration Date:
Registrar: Domain.com, LLC
Registrar IANA ID: 886
Registrar Abuse Contact Email: compliance@domain-inc.net
Registrar Abuse Contact Phone: +1.6022262389
Reseller:
Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited
Registrant Organization: American Physical Society
Registrant State/Province: MD
Registrant Country: US
Name Server: NS-1087.AWSDNS-07.ORG
Name Server: NS-713.AWSDNS-25.NET
Name Server: NS-1828.AWSDNS-36.CO.UK
Name Server: NS-456.AWSDNS-57.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form https://www.icann.org/wicf/)
>>> Last update of WHOIS database: 2021-04-25T01:02:25Z

aps.org server information

Servers Location

aps.org desktop page speed rank

Last tested: 2019-12-05

Desktop Speed Bad

60/100

aps.org Desktop Speed Test Quick Summary

priority - 34Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

http://www.aps.org/ADF/thirdParty/jquery/jquery-1.12.js (expiration not specified)
http://www.aps.org/about/physics-images/images/atom_thumb.jpg (expiration not specified)
http://www.aps.org/about/physics-images/images/electron_thumb.jpg (expiration not specified)
http://www.aps.org/about/physics-images/images/hercules-thumb.jpg (expiration not specified)
http://www.aps.org/about/physics-images/images/laser_thumb.jpg (expiration not specified)
http://www.aps.org/about/physics-images/images/network-thumb.jpg (expiration not specified)
http://www.aps.org/about/physics-images/images/neural-thumbnail.jpg (expiration not specified)
http://www.aps.org/about/physics-images/images/plasmaorb-thumb.jpg (expiration not specified)
http://www.aps.org/about/physics-images/images/unilac_thumb.jpg (expiration not specified)
http://www.aps.org/commonspot/commonspot.css (expiration not specified)
http://www.aps.org/commonspot/dashboard/css/buttons.css (expiration not specified)
http://www.aps.org/commonspot/javascript/browser-all.js (expiration not specified)
http://www.aps.org/commonspot/javascript/lightbox/lightbox.css (expiration not specified)
http://www.aps.org/commonspot/javascript/lightbox/lightbox.js (expiration not specified)
http://www.aps.org/commonspot/javascript/lightbox/overrides.js (expiration not specified)
http://www.aps.org/commonspot/javascript/lightbox/window_ref.js (expiration not specified)
http://www.aps.org/commonspot/javascript/util.js (expiration not specified)
http://www.aps.org/commonspot/pagemode/always-include-common.js (expiration not specified)
http://www.aps.org/commonspot/pagemode/always-include-ns.js (expiration not specified)
http://www.aps.org/elementadmin/adm/images/forbes_340689_450x245.png (expiration not specified)
http://www.aps.org/images/APSWebsiteSlider_AM18EarlyReg.png (expiration not specified)
http://www.aps.org/images/APSWebsiteSlider_AM18Ear…ile_336288_375x175.png (expiration not specified)
http://www.aps.org/images/APSWebsiteSlider_APSHonorsNominations.png (expiration not specified)
http://www.aps.org/images/APSWebsiteSlider_APSHono…ile_336288_375x175.png (expiration not specified)
http://www.aps.org/images/APSWebsiteSlider_BridgeP…am2017_homepage_v2.png (expiration not specified)
http://www.aps.org/images/APSWebsiteSlider_BridgeP…_v1_336288_375x175.png (expiration not specified)
http://www.aps.org/images/APSWebsiteSlider_IBM2018.png (expiration not specified)
http://www.aps.org/images/APSWebsiteSlider_IBM2018…e_2_336288_375x175.png (expiration not specified)
http://www.aps.org/images/APSWebsiteSlider_MM18_RegisterLate.png (expiration not specified)
http://www.aps.org/images/APSWebsiteSlider_MM18_Re…ile_336288_375x175.png (expiration not specified)
http://www.aps.org/images/breakthrough-prize-home_340689_450x245.jpg (expiration not specified)
http://www.aps.org/images/glyphicons_free/glyphico…yphicons-28-search.png (expiration not specified)
http://www.aps.org/images/glyphicons_free/glyphico…/glyphicons-4-user.png (expiration not specified)
http://www.aps.org/images/glyphicons_free/glyphico…ons-433-plus-white.png (expiration not specified)
http://www.aps.org/images/glyphicons_free/glyphico…lyphicons-433-plus.png (expiration not specified)
http://www.aps.org/images/glyphicons_free/glyphico…517-menu-hamburger.png (expiration not specified)
http://www.aps.org/images/home-125_340689_450x245.png (expiration not specified)
http://www.aps.org/images/jan18-apsnews-home_340689_450x245.jpg (expiration not specified)
http://www.aps.org/images/lighthouse-home_340689_450x245.png (expiration not specified)
http://www.aps.org/images/news-iran_1_340689_450x245.png (expiration not specified)
http://www.aps.org/js-responsive/carousel-small.js (expiration not specified)
http://www.aps.org/js-responsive/collapse-boxes.js (expiration not specified)
http://www.aps.org/js-responsive/foundation.min.js (expiration not specified)
http://www.aps.org/js-responsive/left-nav.js (expiration not specified)
http://www.aps.org/js-responsive/mobile-header-nav.js (expiration not specified)
http://www.aps.org/js-responsive/responsive-tables.js (expiration not specified)
http://www.aps.org/js-responsive/vendor/jquery.mobile.custom.min.js (expiration not specified)
http://www.aps.org/policy/issues/research-funding/images/gray_arrow_3.gif (expiration not specified)
http://www.aps.org/programs/honors/images/Greene-2018-Mueed-b.jpg (expiration not specified)
http://www.aps.org/style/carousel-small.css (expiration not specified)
http://www.aps.org/style/carousel.css (expiration not specified)
http://www.aps.org/style/foundation.css (expiration not specified)
http://www.aps.org/style/main-styles.css (expiration not specified)
http://www.aps.org/style/motion-ui.css (expiration not specified)
http://www.aps.org/style/print.css (expiration not specified)
http://www.aps.org/templates/images/apslogo.gif (expiration not specified)
http://www.aps.org/templates/images/bg.gif (expiration not specified)
http://www.aps.org/templates/images/bullet-arrow4.gif (expiration not specified)
http://www.aps.org/templates/images/button-search.gif (expiration not specified)
http://www.aps.org/templates/images/social-facebook.gif (expiration not specified)
http://www.aps.org/templates/images/social-googleplus.gif (expiration not specified)
http://www.aps.org/templates/images/social-linkedin.gif (expiration not specified)
http://www.aps.org/templates/images/social-rss.gif (expiration not specified)
http://www.aps.org/templates/images/social-twitter.gif (expiration not specified)
http://www.aps.org/templates/images/social-youtube.gif (expiration not specified)
http://m.addthisedge.com/live/boost/webupdates/_ate.track.config_resp (49 seconds)
https://s7.addthis.com/js/250/addthis_widget.js (10 minutes)
https://www.google-analytics.com/analytics.js (2 hours)

priority - 26Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 258.8KiB (41% reduction).

Compressing http://www.aps.org/images/APSWebsiteSlider_APSHonorsNominations.png could save 32.6KiB (20% reduction).
Compressing http://www.aps.org/images/breakthrough-prize-home_340689_450x245.jpg could save 30.7KiB (72% reduction).
Compressing http://www.aps.org/about/physics-images/images/laser_thumb.jpg could save 28.5KiB (89% reduction).
Compressing http://www.aps.org/about/physics-images/images/electron_thumb.jpg could save 25.7KiB (86% reduction).
Compressing http://www.aps.org/about/physics-images/images/unilac_thumb.jpg could save 23.7KiB (85% reduction).
Compressing http://www.aps.org/about/physics-images/images/atom_thumb.jpg could save 22.7KiB (89% reduction).
Compressing http://www.aps.org/images/APSWebsiteSlider_APSHono…ile_336288_375x175.png could save 17.9KiB (23% reduction).
Compressing http://www.aps.org/images/home-125_340689_450x245.png could save 13.5KiB (24% reduction).
Compressing and resizing http://www.aps.org/programs/honors/images/Greene-2018-Mueed-b.jpg could save 9.4KiB (83% reduction).
Compressing http://www.aps.org/images/APSWebsiteSlider_AM18EarlyReg.png could save 9.1KiB (38% reduction).
Compressing http://www.aps.org/images/APSWebsiteSlider_MM18_RegisterLate.png could save 8KiB (28% reduction).
Compressing http://www.aps.org/images/news-iran_1_340689_450x245.png could save 6.8KiB (26% reduction).
Compressing http://www.aps.org/images/APSWebsiteSlider_MM18_Re…ile_336288_375x175.png could save 4.9KiB (31% reduction).
Compressing http://www.aps.org/images/APSWebsiteSlider_AM18Ear…ile_336288_375x175.png could save 4.2KiB (41% reduction).
Compressing http://www.aps.org/images/APSWebsiteSlider_BridgeP…am2017_homepage_v2.png could save 3.4KiB (17% reduction).
Compressing http://www.aps.org/images/APSWebsiteSlider_BridgeP…_v1_336288_375x175.png could save 2.9KiB (20% reduction).
Compressing http://www.aps.org/templates/images/social-facebook.gif could save 1.4KiB (59% reduction).
Compressing http://www.aps.org/templates/images/social-linkedin.gif could save 1.3KiB (52% reduction).
Compressing http://www.aps.org/templates/images/social-rss.gif could save 1.3KiB (51% reduction).
Compressing http://www.aps.org/templates/images/social-twitter.gif could save 1.3KiB (52% reduction).
Compressing http://www.aps.org/templates/images/social-youtube.gif could save 1.2KiB (45% reduction).
Compressing http://www.aps.org/images/glyphicons_free/glyphico…yphicons-28-search.png could save 1.1KiB (78% reduction).
Compressing http://www.aps.org/images/glyphicons_free/glyphico…/glyphicons-4-user.png could save 1.1KiB (84% reduction).
Compressing http://www.aps.org/images/glyphicons_free/glyphico…lyphicons-433-plus.png could save 1.1KiB (89% reduction).
Compressing http://www.aps.org/images/glyphicons_free/glyphico…517-menu-hamburger.png could save 1.1KiB (91% reduction).
Compressing http://www.aps.org/templates/images/button-search.gif could save 1KiB (83% reduction).
Compressing http://www.aps.org/templates/images/social-googleplus.gif could save 1KiB (36% reduction).
Compressing http://www.aps.org/templates/images/bg.gif could save 859B (83% reduction).
Compressing http://www.aps.org/about/physics-images/images/hercules-thumb.jpg could save 689B (18% reduction).
Compressing http://www.aps.org/about/physics-images/images/plasmaorb-thumb.jpg could save 400B (17% reduction).

priority - 6Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 2 blocking script resources and 7 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

http://www.aps.org/ADF/thirdParty/jquery/jquery-1.12.js
http://www.aps.org/commonspot/javascript/browser-all.js

Optimize CSS Delivery of the following:

http://www.aps.org/style/foundation.css
http://www.aps.org/style/motion-ui.css
http://www.aps.org/style/main-styles.css
http://www.aps.org/style/carousel.css
http://cdn.jsdelivr.net/jquery.slick/1.5.9/slick.css
http://www.aps.org/style/carousel-small.css
http://www.aps.org/commonspot/commonspot.css

priority - 2Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 20.5KiB (39% reduction).

Minifying http://www.aps.org/commonspot/javascript/util.js could save 9.2KiB (47% reduction) after compression.
Minifying http://www.aps.org/commonspot/javascript/lightbox/lightbox.js could save 6.5KiB (39% reduction) after compression.
Minifying http://www.aps.org/commonspot/javascript/lightbox/overrides.js could save 1.8KiB (32% reduction) after compression.
Minifying http://www.aps.org/commonspot/javascript/browser-all.js could save 904B (26% reduction) after compression.
Minifying http://www.aps.org/commonspot/javascript/lightbox/window_ref.js could save 842B (24% reduction) after compression.
Minifying http://www.aps.org/commonspot/pagemode/always-include-ns.js could save 445B (38% reduction) after compression.
Minifying http://www.aps.org/js-responsive/responsive-tables.js could save 388B (57% reduction) after compression.
Minifying http://www.aps.org/commonspot/pagemode/always-include-common.js could save 169B (30% reduction) after compression.
Minifying http://www.aps.org/js-responsive/carousel-small.js could save 147B (45% reduction) after compression.
Minifying http://www.aps.org/js-responsive/mobile-header-nav.js could save 126B (19% reduction) after compression.

priority - 1Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 6KiB (21% reduction).

Minifying http://www.aps.org/style/foundation.css could save 2.9KiB (20% reduction) after compression.
Minifying http://www.aps.org/commonspot/commonspot.css could save 1.3KiB (27% reduction) after compression.
Minifying http://www.aps.org/style/main-styles.css could save 1.2KiB (20% reduction) after compression.
Minifying http://www.aps.org/commonspot/dashboard/css/buttons.css could save 276B (16% reduction) after compression.
Minifying http://www.aps.org/commonspot/javascript/lightbox/lightbox.css could save 265B (26% reduction) after compression.

priority - 0Minify HTML

Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.

Minify HTML for the following resources to reduce their size by 1.5KiB (16% reduction).

Minifying http://www.aps.org/ could save 1.5KiB (16% reduction) after compression.

priority - 0Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 563B (63% reduction).

Compressing https://www.howsmyssl.com/a/check?callback=parseTLSinfo could save 563B (63% reduction).

aps.org Desktop Resource Breakdown

Total Resources	81
Number of Hosts	11
Static Resources	71
JavaScript Resources	23
CSS Resources	10

aps.org mobile page speed rank

Last tested: 2017-05-19

Mobile Speed Bad

46/100

aps.org Mobile Speed Test Quick Summary

priority - 50Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

http://www.aps.org/about/physics-images/images/bentcore-thumb.jpg (expiration not specified)
http://www.aps.org/about/physics-images/images/blackhole_thumb_1.jpg (expiration not specified)
http://www.aps.org/about/physics-images/images/flamingstar-thumb.jpg (expiration not specified)
http://www.aps.org/about/physics-images/images/network-thumb.jpg (expiration not specified)
http://www.aps.org/about/physics-images/images/redsplash-thumb.jpg (expiration not specified)
http://www.aps.org/about/physics-images/images/thinfilms-thumb.jpg (expiration not specified)
http://www.aps.org/about/physics-images/images/tube-thumbnail.jpg (expiration not specified)
http://www.aps.org/about/physics-images/images/umbilic-thumb.jpg (expiration not specified)
http://www.aps.org/commonspot/commonspot.css (expiration not specified)
http://www.aps.org/commonspot/dashboard/css/buttons.css (expiration not specified)
http://www.aps.org/commonspot/javascript/browser-all.js (expiration not specified)
http://www.aps.org/commonspot/javascript/lightbox/lightbox.css (expiration not specified)
http://www.aps.org/commonspot/javascript/lightbox/lightbox.js (expiration not specified)
http://www.aps.org/commonspot/javascript/lightbox/overrides.js (expiration not specified)
http://www.aps.org/commonspot/javascript/lightbox/window_ref.js (expiration not specified)
http://www.aps.org/commonspot/javascript/util.js (expiration not specified)
http://www.aps.org/commonspot/pagemode/always-include-common.js (expiration not specified)
http://www.aps.org/commonspot/pagemode/always-include-ns.js (expiration not specified)
http://www.aps.org/images/APSWebsiteSlider_APSHonorsNominations.png (expiration not specified)
http://www.aps.org/images/APSWebsiteSlider_APSHono…ile_336288_375x175.png (expiration not specified)
http://www.aps.org/images/APSWebsiteSlider_BrazilUSExchange2017.png (expiration not specified)
http://www.aps.org/images/APSWebsiteSlider_BrazilU…ile_336288_375x175.png (expiration not specified)
http://www.aps.org/images/APSWebsiteSlider_IRTAP2017.png (expiration not specified)
http://www.aps.org/images/APSWebsiteSlider_IRTAP20…ile_336288_375x175.png (expiration not specified)
http://www.aps.org/images/APSWebsiteSlider_SpringAppeal2017.png (expiration not specified)
http://www.aps.org/images/APSWebsiteSlider_SpringA…ile_336288_375x175.png (expiration not specified)
http://www.aps.org/images/APSWebsiteSlider_USLebanonProgram.png (expiration not specified)
http://www.aps.org/images/APSWebsiteSlider_USLeban…ile_336288_375x175.png (expiration not specified)
http://www.aps.org/images/aaas2017class_340689_450x245.jpg (expiration not specified)
http://www.aps.org/images/apsnewsmay2017_340689_450x245.jpg (expiration not specified)
http://www.aps.org/images/cam2017-mobile_1_336288_375x175.jpg (expiration not specified)
http://www.aps.org/images/cam2017.jpg (expiration not specified)
http://www.aps.org/images/glyphicons_free/glyphico…yphicons-28-search.png (expiration not specified)
http://www.aps.org/images/glyphicons_free/glyphico…/glyphicons-4-user.png (expiration not specified)
http://www.aps.org/images/glyphicons_free/glyphico…ons-433-plus-white.png (expiration not specified)
http://www.aps.org/images/glyphicons_free/glyphico…lyphicons-433-plus.png (expiration not specified)
http://www.aps.org/images/glyphicons_free/glyphico…517-menu-hamburger.png (expiration not specified)
http://www.aps.org/images/henleye-home_340689_450x245.jpg (expiration not specified)
http://www.aps.org/images/jin-home_340689_450x245.jpg (expiration not specified)
http://www.aps.org/images/kavli-home_1_340689_450x245.jpg (expiration not specified)
http://www.aps.org/images/scoap3_340689_450x245.png (expiration not specified)
http://www.aps.org/js-responsive/carousel-small.js (expiration not specified)
http://www.aps.org/js-responsive/collapse-boxes.js (expiration not specified)
http://www.aps.org/js-responsive/foundation.min.js (expiration not specified)
http://www.aps.org/js-responsive/left-nav.js (expiration not specified)
http://www.aps.org/js-responsive/mobile-header-nav.js (expiration not specified)
http://www.aps.org/js-responsive/responsive-tables.js (expiration not specified)
http://www.aps.org/js-responsive/vendor/jquery.mobile.custom.min.js (expiration not specified)
http://www.aps.org/policy/issues/research-funding/images/gray_arrow_3.gif (expiration not specified)
http://www.aps.org/programs/honors/images/negra17.jpg (expiration not specified)
http://www.aps.org/style/carousel-small.css (expiration not specified)
http://www.aps.org/style/carousel.css (expiration not specified)
http://www.aps.org/style/foundation.css (expiration not specified)
http://www.aps.org/style/main-styles.css (expiration not specified)
http://www.aps.org/style/motion-ui.css (expiration not specified)
http://www.aps.org/style/print.css (expiration not specified)
http://www.aps.org/templates/images/apslogo.gif (expiration not specified)
http://www.aps.org/templates/images/bullet-arrow4.gif (expiration not specified)
http://www.aps.org/templates/images/button-search.gif (expiration not specified)
http://www.aps.org/templates/images/social-facebook.gif (expiration not specified)
http://www.aps.org/templates/images/social-googleplus.gif (expiration not specified)
http://www.aps.org/templates/images/social-linkedin.gif (expiration not specified)
http://www.aps.org/templates/images/social-rss.gif (expiration not specified)
http://www.aps.org/templates/images/social-twitter.gif (expiration not specified)
http://www.aps.org/templates/images/social-youtube.gif (expiration not specified)
http://script.crazyegg.com/pages/scripts/0049/3801.js?415339 (60 minutes)
https://www.google-analytics.com/analytics.js (2 hours)

priority - 40Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 15 blocking script resources and 9 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

https://code.jquery.com/jquery-2.1.4.min.js
http://www.aps.org/commonspot/javascript/browser-all.js
https://www.howsmyssl.com/a/check?callback=parseTLSinfo
http://www.aps.org/js-responsive/foundation.min.js
http://www.aps.org/js-responsive/vendor/jquery.mobile.custom.min.js
http://www.aps.org/js-responsive/mobile-header-nav.js
http://www.aps.org/js-responsive/collapse-boxes.js
http://www.aps.org/js-responsive/responsive-tables.js
http://www.aps.org/commonspot/javascript/lightbox/overrides.js
http://www.aps.org/commonspot/javascript/lightbox/window_ref.js
http://www.aps.org/commonspot/pagemode/always-include-common.js
http://www.aps.org/commonspot/pagemode/always-include-ns.js
http://cdn.jsdelivr.net/jquery.slick/1.5.9/slick.min.js
http://www.aps.org/js-responsive/carousel-small.js
http://www.aps.org/js-responsive/left-nav.js

Optimize CSS Delivery of the following:

priority - 29Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 278.7KiB (50% reduction).

Compressing http://www.aps.org/images/apsnewsmay2017_340689_450x245.jpg could save 108KiB (79% reduction).
Compressing http://www.aps.org/images/kavli-home_1_340689_450x245.jpg could save 46.3KiB (74% reduction).
Compressing http://www.aps.org/images/aaas2017class_340689_450x245.jpg could save 36.6KiB (73% reduction).
Compressing http://www.aps.org/images/APSWebsiteSlider_APSHonorsNominations.png could save 32.6KiB (20% reduction).
Compressing http://www.aps.org/about/physics-images/images/blackhole_thumb_1.jpg could save 20.4KiB (90% reduction).
Compressing http://www.aps.org/images/APSWebsiteSlider_APSHono…ile_336288_375x175.png could save 17.9KiB (23% reduction).
Compressing http://www.aps.org/images/APSWebsiteSlider_SpringA…ile_336288_375x175.png could save 2.4KiB (36% reduction).
Compressing http://www.aps.org/templates/images/social-facebook.gif could save 1.4KiB (59% reduction).
Compressing http://www.aps.org/templates/images/social-linkedin.gif could save 1.3KiB (52% reduction).
Compressing http://www.aps.org/templates/images/social-rss.gif could save 1.3KiB (51% reduction).
Compressing http://www.aps.org/templates/images/social-twitter.gif could save 1.3KiB (52% reduction).
Compressing http://www.aps.org/templates/images/social-youtube.gif could save 1.2KiB (45% reduction).
Compressing http://www.aps.org/images/glyphicons_free/glyphico…yphicons-28-search.png could save 1.1KiB (78% reduction).
Compressing http://www.aps.org/images/glyphicons_free/glyphico…/glyphicons-4-user.png could save 1.1KiB (84% reduction).
Compressing http://www.aps.org/images/glyphicons_free/glyphico…lyphicons-433-plus.png could save 1.1KiB (89% reduction).
Compressing http://www.aps.org/images/glyphicons_free/glyphico…517-menu-hamburger.png could save 1.1KiB (91% reduction).
Compressing http://www.aps.org/templates/images/button-search.gif could save 1KiB (83% reduction).
Compressing http://www.aps.org/templates/images/social-googleplus.gif could save 1KiB (36% reduction).
Compressing http://www.aps.org/images/cam2017-mobile_1_336288_375x175.jpg could save 1,005B (12% reduction).
Compressing http://www.aps.org/about/physics-images/images/thinfilms-thumb.jpg could save 591B (22% reduction).

priority - 8Prioritize visible content

Your page requires additional network round trips to render the above-the-fold content. For best performance, reduce the amount of HTML needed to render above-the-fold content.

The entire HTML response was not sufficient to render the above-the-fold content. This usually indicates that additional resources, loaded after HTML parsing, were required to render above-the-fold content. Prioritize visible content that is needed for rendering above-the-fold by including it directly in the HTML response.

Only about 57% of the final above-the-fold content could be rendered with the full HTML response.

priority - 2Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 19.2KiB (40% reduction).

priority - 1Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 5.2KiB (22% reduction).

Minifying http://www.aps.org/style/foundation.css could save 2.7KiB (20% reduction) after compression.
Minifying http://www.aps.org/commonspot/commonspot.css could save 1.3KiB (27% reduction) after compression.
Minifying http://www.aps.org/style/main-styles.css could save 1.2KiB (24% reduction) after compression.

priority - 0Minify HTML

Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.

Minify HTML for the following resources to reduce their size by 1.4KiB (15% reduction).

Minifying http://www.aps.org/ could save 1.4KiB (15% reduction) after compression.

priority - 0Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 563B (63% reduction).

Compressing https://www.howsmyssl.com/a/check?callback=parseTLSinfo could save 563B (63% reduction).

aps.org Mobile Resource Breakdown

Total Resources	78
Number of Hosts	10
Static Resources	70
JavaScript Resources	20
CSS Resources	10

aps.org mobile page usability

Last tested: 2017-05-19

Mobile Usability Good

99/100

aps.org Mobile Usability Test Quick Summary

priority - 0Size tap targets appropriately

Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.

The following tap targets are close to other nearby tap targets and may need additional spacing around them.

The tap target <button type="button" class="slick-next slick-arrow">Next</button> is close to 2 other tap targets.
The tap target <button type="button" class="slick-next slick-arrow">Next</button> is close to 2 other tap targets.
The tap target <a href="/membership/units/index.cfm">Unit Websites</a> and 1 others are close to other tap targets.
The tap target <a href="/">American Physical Society</a> and 1 others are close to other tap targets.

aps.org HTML validation

Errors

Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.

Line: 7 Column: 1 - 52
"...UTF-8" /> <meta http-equiv="Content-Language" content="en-us"> <meta..."

Element “meta” is missing one or more of the following attributes: “charset”, “content”, “http-equiv”, “itemprop”, “name”, “property”.

Line: 43 Column: 1 - 28
"...="print"> <meta class="foundation-mq"> <meta..."

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

Line: 88 Column: 1 - 72
"...-button"> <img src="/images/glyphicons_free/glyphicons/png/glyphicons-4-user.png"> <!-- ..." Line: 92 Column: 1 - 75
"...-button"> <img src="/images/glyphicons_free/glyphicons/png/glyphicons-28-search.png"> <!-- ..." Line: 96 Column: 1 - 84
"...-button"> <img src="/images/glyphicons_free/glyphicons/png/glyphicons-517-menu-hamburger.png"> <!-- ..." Line: 242 Column: 1 - 62
"...s="news"> <img src="/elementadmin/adm/images/forbes_340689_450x245.png"> <p><s..." Line: 248 Column: 1 - 52
"...s="news"> <img src="/images/news-apsn1117_340689_450x245.png"> <p><s..." Line: 254 Column: 1 - 45
"...s="news"> <img src="/images/greene_340689_450x245.png"> <p><s..." Line: 260 Column: 1 - 56
"...s="news"> <img src="/images/home-neutron-star_340689_450x245.png"> <p><s..." Line: 266 Column: 1 - 48
"...s="news"> <img src="/images/nobel17-2_340689_450x245.png"> <p><s..." Line: 272 Column: 1 - 49
"...s="news"> <img src="/images/virgo-news_340689_450x245.png"> <p><s..." Line: 334 Column: 4 - 50
"...ll" /> <p><img src="/templates/images/bullet-arrow4.gif"> <a hr..."

Bad value “javascript:void()” for attribute “href” on element “a”: syntax error

Line: 103 Column: 102 - 129
"...esMobile"><a href="javascript:void()">Americ..."

Duplicate ID “apsSitesMobile”.

Line: 103 Column: 4034 - 4084
"...</ul></li><li id="apsSitesMobile" class="apsUtilitiesMobile"><a hre..."

Element “button” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)

Line: 121 Column: 1 - 31
"...ntainer"> <button class="orbit-previous"><span ..." Line: 122 Column: 1 - 27
"...</button> <button class="orbit-next"><span ..."

The “hspace” attribute on the “img” element is obsolete. Use CSS instead.

The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.

Line: 201 Column: 1 - 60
"...orld.</p> <table cellpadding="0" cellspacing="0" style="width: 100%;"> <tbod..."

The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.

Line: 201 Column: 1 - 60
"...orld.</p> <table cellpadding="0" cellspacing="0" style="width: 100%;"> <tbod..."

The “vspace” attribute on the “img” element is obsolete. Use CSS instead.

Line: 204 Column: 5 - 169
"... <tr> <td><img alt="Gray Arrow" border="0" height="7" hspace="0" src="/policy/issues/research-funding/images/gray_arrow_3.gif" title="gray_arrow_3.gif" vspace="0" width="6" /> <a hr..." Line: 205 Column: 5 - 169
"...</td> <td><img alt="Gray Arrow" border="0" height="7" hspace="0" src="/policy/issues/research-funding/images/gray_arrow_3.gif" title="gray_arrow_3.gif" vspace="0" width="6" /> <a hr..." Line: 208 Column: 5 - 169
"... <tr> <td><img alt="Gray Arrow" border="0" height="7" hspace="0" src="/policy/issues/research-funding/images/gray_arrow_3.gif" title="gray_arrow_3.gif" vspace="0" width="6" /> <a hr..." Line: 220 Column: 4 - 168
"...>.</p> <p><img alt="Gray Arrow" border="0" height="7" hspace="0" src="/policy/issues/research-funding/images/gray_arrow_3.gif" title="gray_arrow_3.gif" vspace="0" width="6" /> <a hr..." Line: 225 Column: 4 - 165
"...a></p> <p><img src="/policy/issues/research-funding/images/gray_arrow_3.gif" id="||CPIMAGE:40417|" alt="Gray arrow" border="0" height="7" hspace="0" vspace="0" width="6" /> <a hr..." Line: 287 Column: 4 - 194
"...CA</p> <p><img alt="Gray Arrow" border="0" data-render="1|0|0|1|6|7" height="7" hspace="0" src="/policy/issues/research-funding/images/gray_arrow_3.gif" title="gray_arrow_3.gif" vspace="0" width="6" /> <a hr..." Line: 292 Column: 4 - 168
"...OH</p> <p><img alt="Gray Arrow" border="0" height="7" hspace="0" src="/policy/issues/research-funding/images/gray_arrow_3.gif" title="gray_arrow_3.gif" vspace="0" width="6" /> <a hr..." Line: 308 Column: 4 - 194
"...8.</p> <p><img alt="Gray Arrow" border="0" data-render="1|0|0|1|6|7" height="7" hspace="0" src="/policy/issues/research-funding/images/gray_arrow_3.gif" title="gray_arrow_3.gif" vspace="0" width="6" /> <a hr..." Line: 322 Column: 165 - 323
"... 20px 0;"><img alt="Gray Arrow" border="0" height="7" hspace="0" src="/policy/issues/research-funding/images/gray_arrow_3.gif" title="Gray Arrow" vspace="0" width="6" /> <a hr..." Line: 338 Column: 4 - 168
"...s.</p> <p><img alt="Gray Arrow" border="0" height="7" hspace="0" src="/policy/issues/research-funding/images/gray_arrow_3.gif" title="gray_arrow_3.gif" vspace="0" width="6" /> <a hr..." Line: 339 Column: 1 - 165
".../a><br /> <img alt="Gray Arrow" border="0" height="7" hspace="0" src="/policy/issues/research-funding/images/gray_arrow_3.gif" title="gray_arrow_3.gif" vspace="0" width="6" /> <a hr..." Line: 351 Column: 4 - 165
"...> </p> <p><img src="/policy/issues/research-funding/images/gray_arrow_3.gif" id="||CPIMAGE:40417|" alt="Gray arrow" border="0" height="7" hspace="0" vspace="0" width="6" /> <a id..."

Duplicate ID “||CPIMAGE:40417|”.

Line: 225 Column: 4 - 165
"...a></p> <p><img src="/policy/issues/research-funding/images/gray_arrow_3.gif" id="||CPIMAGE:40417|" alt="Gray arrow" border="0" height="7" hspace="0" vspace="0" width="6" /> <a hr..." Line: 351 Column: 4 - 165
"...> </p> <p><img src="/policy/issues/research-funding/images/gray_arrow_3.gif" id="||CPIMAGE:40417|" alt="Gray arrow" border="0" height="7" hspace="0" vspace="0" width="6" /> <a id..."

Bad value “” for attribute “height” on element “img”: The empty string is not a valid non-negative integer.

Line: 278 Column: 155 - 234
"...xt-right"><img alt="arrow" height="" src="/templates/images/bullet-arrow4.gif" width="" /> <a hr..."

Bad value “” for attribute “width” on element “img”: The empty string is not a valid non-negative integer.

Line: 278 Column: 155 - 234
"...xt-right"><img alt="arrow" height="" src="/templates/images/bullet-arrow4.gif" width="" /> <a hr..."

The “clear” attribute on the “br” element is obsolete. Use CSS instead.

Line: 333 Column: 1 - 18
"...pan> </p> <br clear="all" /> <p><i..."

The “align” attribute on the “img” element is obsolete. Use CSS instead.

Line: 372 Column: 57 - 186
"...="_blank"><img src="/templates/images/social-twitter.gif" alt="Twitter" title="Twitter" align="absmiddle" border="0" height="35" width="35"></a> <..." Line: 373 Column: 62 - 194
"...="_blank"><img src="/templates/images/social-facebook.gif" alt="Facebook" title="Facebook" align="absmiddle" border="0" height="35" width="35"></a> <..." Line: 374 Column: 70 - 202
"...="_blank"><img src="/templates/images/social-linkedin.gif" alt="LinkedIn" title="LinkedIn" align="absmiddle" border="0" height="35" width="35"></a> <..." Line: 375 Column: 49 - 174
"...="_blank"><img src="/templates/images/social-rss.gif" alt="Feeds" title="RSS Feeds" align="absmiddle" border="0" height="35" width="35"></a> <..." Line: 376 Column: 77 - 217
"...="_blank"><img src="/templates/images/social-googleplus.gif" alt="Google Plus" title="Google Plus" align="absmiddle" border="0" height="35" width="35"></a> <..." Line: 377 Column: 67 - 196
"...="_blank"><img src="/templates/images/social-youtube.gif" alt="YouTube" title="YouTube" align="absmiddle" border="0" height="35" width="35"></a> <..."

A “script” element with the “language="JavaScript"” attribute set must not have a “type” attribute whose value is not “text/javascript”.

Line: 456 Column: 1 - 60
"...epage --> <script type="application/javascript" language="javascript"> <!-- ..."

Warnings

The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.

Line: 60 Column: 44 - 64
"...Document"><a name="__topdoc__"></a> <..." Line: 189 Column: 117 - 167
"...ightCol"> <a name="Upcoming_Meetings" id="Upcoming_Meetings"></a><a..." Line: 189 Column: 172 - 216
"...ings"></a><a name="CP_JUMP_318708" id="CP_JUMP_318708"></a><d..." Line: 200 Column: 1 - 51
"...t:10px;"> <a name="cb-APS_Membership" id="cb-APS_Membership"></a><a..." Line: 200 Column: 56 - 100
"...ship"></a><a name="CP_JUMP_336367" id="CP_JUMP_336367"></a><d..." Line: 218 Column: 1 - 63
"...t:10px;"> <a name="cbhead-APS_Publications" id="cbhead-APS_Publications"></a><a..." Line: 218 Column: 68 - 112
"...ions"></a><a name="CP_JUMP_318709" id="CP_JUMP_318709"></a><d..." Line: 220 Column: 265 - 329
"...iv></div> <a name="cbchild-APS_Pubs_Physics" id="cbchild-APS_Pubs_Physics"></a><a..." Line: 220 Column: 334 - 378
"...sics"></a><a name="CP_JUMP_318710" id="CP_JUMP_318710"></a><d..." Line: 226 Column: 14 - 70
"...iv></div> <a name="cbfoot-APS_Pubs_News" id="cbfoot-APS_Pubs_News"></a><a..." Line: 226 Column: 75 - 119
"...News"></a><a name="CP_JUMP_318711" id="CP_JUMP_318711"></a><d..."

The first occurrence of ID “apsSitesMobile” was here.

Line: 103 Column: 78 - 101
"... id="nav"><li id="apsSitesMobile"><a hre..."

The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.

Line: 194 Column: 4 - 173
"...0px;"> <p><img id="||CPIMAGE:40417|" title="Gray arrow" height="7" alt="Gray arrow" hspace="0" src="/policy/issues/research-funding/images/gray_arrow_3.gif" width="6" border="0" /> <a hr..." Line: 204 Column: 5 - 169
"... <tr> <td><img alt="Gray Arrow" border="0" height="7" hspace="0" src="/policy/issues/research-funding/images/gray_arrow_3.gif" title="gray_arrow_3.gif" vspace="0" width="6" /> <a hr..." Line: 205 Column: 5 - 169
"...</td> <td><img alt="Gray Arrow" border="0" height="7" hspace="0" src="/policy/issues/research-funding/images/gray_arrow_3.gif" title="gray_arrow_3.gif" vspace="0" width="6" /> <a hr..." Line: 208 Column: 5 - 169
"... <tr> <td><img alt="Gray Arrow" border="0" height="7" hspace="0" src="/policy/issues/research-funding/images/gray_arrow_3.gif" title="gray_arrow_3.gif" vspace="0" width="6" /> <a hr..." Line: 220 Column: 4 - 168
"...>.</p> <p><img alt="Gray Arrow" border="0" height="7" hspace="0" src="/policy/issues/research-funding/images/gray_arrow_3.gif" title="gray_arrow_3.gif" vspace="0" width="6" /> <a hr..." Line: 225 Column: 4 - 165
"...a></p> <p><img src="/policy/issues/research-funding/images/gray_arrow_3.gif" id="||CPIMAGE:40417|" alt="Gray arrow" border="0" height="7" hspace="0" vspace="0" width="6" /> <a hr..." Line: 287 Column: 4 - 194
"...CA</p> <p><img alt="Gray Arrow" border="0" data-render="1|0|0|1|6|7" height="7" hspace="0" src="/policy/issues/research-funding/images/gray_arrow_3.gif" title="gray_arrow_3.gif" vspace="0" width="6" /> <a hr..." Line: 292 Column: 4 - 168
"...OH</p> <p><img alt="Gray Arrow" border="0" height="7" hspace="0" src="/policy/issues/research-funding/images/gray_arrow_3.gif" title="gray_arrow_3.gif" vspace="0" width="6" /> <a hr..." Line: 308 Column: 4 - 194
"...8.</p> <p><img alt="Gray Arrow" border="0" data-render="1|0|0|1|6|7" height="7" hspace="0" src="/policy/issues/research-funding/images/gray_arrow_3.gif" title="gray_arrow_3.gif" vspace="0" width="6" /> <a hr..." Line: 322 Column: 165 - 323
"... 20px 0;"><img alt="Gray Arrow" border="0" height="7" hspace="0" src="/policy/issues/research-funding/images/gray_arrow_3.gif" title="Gray Arrow" vspace="0" width="6" /> <a hr..." Line: 331 Column: 4 - 189
"...cs</p> <p><img style="float:left;padding-right:10px;padding-bottom:5px;width:80px;" alt="Bradley Sherrill" border="0" src="/programs/honors/images/Bonner-Sherrill18.jpg" title="Bradley Sherrill"/> <a hr..." Line: 338 Column: 4 - 168
"...s.</p> <p><img alt="Gray Arrow" border="0" height="7" hspace="0" src="/policy/issues/research-funding/images/gray_arrow_3.gif" title="gray_arrow_3.gif" vspace="0" width="6" /> <a hr..." Line: 339 Column: 1 - 165
".../a><br /> <img alt="Gray Arrow" border="0" height="7" hspace="0" src="/policy/issues/research-funding/images/gray_arrow_3.gif" title="gray_arrow_3.gif" vspace="0" width="6" /> <a hr..." Line: 351 Column: 4 - 165
"...> </p> <p><img src="/policy/issues/research-funding/images/gray_arrow_3.gif" id="||CPIMAGE:40417|" alt="Gray arrow" border="0" height="7" hspace="0" vspace="0" width="6" /> <a id..." Line: 372 Column: 57 - 186
"...="_blank"><img src="/templates/images/social-twitter.gif" alt="Twitter" title="Twitter" align="absmiddle" border="0" height="35" width="35"></a> <..." Line: 373 Column: 62 - 194
"...="_blank"><img src="/templates/images/social-facebook.gif" alt="Facebook" title="Facebook" align="absmiddle" border="0" height="35" width="35"></a> <..." Line: 374 Column: 70 - 202
"...="_blank"><img src="/templates/images/social-linkedin.gif" alt="LinkedIn" title="LinkedIn" align="absmiddle" border="0" height="35" width="35"></a> <..." Line: 375 Column: 49 - 174
"...="_blank"><img src="/templates/images/social-rss.gif" alt="Feeds" title="RSS Feeds" align="absmiddle" border="0" height="35" width="35"></a> <..." Line: 376 Column: 77 - 217
"...="_blank"><img src="/templates/images/social-googleplus.gif" alt="Google Plus" title="Google Plus" align="absmiddle" border="0" height="35" width="35"></a> <..." Line: 377 Column: 67 - 196
"...="_blank"><img src="/templates/images/social-youtube.gif" alt="YouTube" title="YouTube" align="absmiddle" border="0" height="35" width="35"></a> <..."

The first occurrence of ID “||CPIMAGE:40417|” was here.

The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.

Line: 238 Column: - 14
"...> <!-- Begin -- News Features ..."

aps.org similar domains

Similar domains:

www.aps.com
www.aps.net
www.aps.org
www.aps.info
www.aps.biz
www.aps.us
www.aps.mobi
www.ps.org
www.aps.org
www.qps.org
www.aqps.org
www.qaps.org
www.wps.org
www.awps.org
www.waps.org
www.sps.org
www.asps.org
www.saps.org
www.zps.org
www.azps.org
www.zaps.org
www.as.org
www.aos.org
www.apos.org
www.aops.org
www.als.org
www.apls.org
www.alps.org
www.ap.org
www.apw.org
www.apsw.org
www.apws.org
www.ape.org
www.apse.org
www.apes.org
www.apd.org
www.apsd.org
www.apds.org
www.apz.org
www.apsz.org
www.apzs.org
www.apx.org
www.apsx.org
www.apxs.org
www.apa.org
www.apsa.org
www.apas.org

aps.org Ping

Ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network. It measures the round-trip time for messages sent from the originating host to a destination computer that are echoed back to the source.

aps.org TRACEROUTE

Traceroute is a computer network diagnostic tool for displaying the route (path) and measuring transit delays of packets across an Internet Protocol (IP) network. The history of the route is recorded as the round-trip times of the packets received from each successive host (remote node) in the route (path); the sum of the mean times in each hop is a measure of the total time spent to establish the connection. Traceroute proceeds unless all (three) sent packets are lost more than twice, then the connection is lost and the route cannot be evaluated.

APS.ORG Website Information

aps.org Website Information

Advertisement

aps.org Alexa Rank

aps.org whois

aps.org server information

Servers Location

aps.org desktop page speed rank

aps.org Desktop Speed Test Quick Summary

priority - 34Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

priority - 26Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 258.8KiB (41% reduction).

priority - 6Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 2 blocking script resources and 7 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

Optimize CSS Delivery of the following:

priority - 2Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 20.5KiB (39% reduction).

priority - 1Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 6KiB (21% reduction).

priority - 0Minify HTML

Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.

Minify HTML for the following resources to reduce their size by 1.5KiB (16% reduction).

priority - 0Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 563B (63% reduction).

aps.org Desktop Resource Breakdown

aps.org mobile page speed rank

aps.org Mobile Speed Test Quick Summary

priority - 50Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

priority - 40Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 15 blocking script resources and 9 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

Optimize CSS Delivery of the following:

priority - 29Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 278.7KiB (50% reduction).

priority - 8Prioritize visible content

Your page requires additional network round trips to render the above-the-fold content. For best performance, reduce the amount of HTML needed to render above-the-fold content.

priority - 2Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 19.2KiB (40% reduction).

priority - 1Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 5.2KiB (22% reduction).

priority - 0Minify HTML

Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.

Minify HTML for the following resources to reduce their size by 1.4KiB (15% reduction).

priority - 0Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 563B (63% reduction).

aps.org Mobile Resource Breakdown

aps.org mobile page usability

aps.org Mobile Usability Test Quick Summary

priority - 0Size tap targets appropriately

Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.

The following tap targets are close to other nearby tap targets and may need additional spacing around them.

aps.org HTML validation

Errors

Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.

Element “meta” is missing one or more of the following attributes: “charset”, “content”, “http-equiv”, “itemprop”, “name”, “property”.

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

Bad value “javascript:void()” for attribute “href” on element “a”: syntax error

Duplicate ID “apsSitesMobile”.

Element “button” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)

The “hspace” attribute on the “img” element is obsolete. Use CSS instead.

The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.

The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.

The “vspace” attribute on the “img” element is obsolete. Use CSS instead.

Duplicate ID “||CPIMAGE:40417|”.

Bad value “” for attribute “height” on element “img”: The empty string is not a valid non-negative integer.

Bad value “” for attribute “width” on element “img”: The empty string is not a valid non-negative integer.

The “clear” attribute on the “br” element is obsolete. Use CSS instead.