Creative Commons

What is Creative Commons?

The Creative Commons (CC) enables copyright holders to grant some or all of their rights to the public while retaining others through a variety of licensing and contract schemes. PSC prefers the Creative Commons 3.0 license, which is well suited to education and academic research. This license allows people to use your work for non-commercial purposes, but they must attribute you as a source, and they must share any derivative works under the same license.

Offering your work under a CC license does not mean giving up your copyright. It means offering some of your rights to any member of the public but only on certain conditions. You may offer your work on PSC under a non-commercial license and still grant commercial licenses separately, on a case-by-case basis.

For further information on Creative Commons visit the Creative Commons homepage.

From the Creative Commons FAQ:

What if I change my mind?

Creative Commons licenses are non-revocable. This means that you cannot stop someone, who has obtained your work under a Creative Commons license, from using the work according to that license. You can stop distributing your work under a Creative Commons license at any time you wish; but this will not withdraw any copies of your work that already exist under a Creative Commons license from circulation, be they verbatim copies, copies included in collective works and/or adaptations of your work. So you need to think carefully when choosing a Creative Commons license to make sure that you are happy for people to be using your work consistent with the terms of the license, even if you later stop distributing your work.

Do Creative Commons licenses affect fair use, fair dealing or other exceptions to copyright?

No. All jurisdictions allow some uses of copyrighted material without permission, such as quotation, current-affairs reporting, or parody, although these vary from country to country. These are not dependent on the license and so cannot be affected by it. To make this clear, all of our licenses include this or similar language: Nothing in this license is intended to reduce, limit, or restrict any rights arising from fair use, first sale or other limitations on the exclusive rights of the copyright owner under copyright law or other applicable laws. Thus, regardless of the jurisdiction a user is in, our licenses do not affect a user's right to use or allow use of content under copyright exceptions.

What happens if someone misuses my Creative Commons-licensed work?

A Creative Commons license terminates automatically if someone uses your work contrary to the license terms. This means that, if a person uses your work under a Creative Commons license and they, for example, fail to attribute your work in the manner you specified, then they no longer have the right to continue to use your work. This only applies in relation to the person in breach of the license; it does not apply generally to the other people who use your work under a Creative Commons license and comply with its terms.

Debug Console

Close4 MBRequestSessionTimelineDatabase26Events25
$_GET
Array( ) Array(

)
$_POST
Array( ) Array(

)
$_COOKIE
Array( ) Array(

)
$_SERVER
Array( TEMP => /var/www/tmp, TMPDIR => /var/www/tmp, TMP => /var/www/tmp, PATH => /usr/lo... Array(
TEMP => /var/www/tmp,
TMPDIR => /var/www/tmp,
TMP => /var/www/tmp,
PATH => /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin,
USER => apache,
HOME => /usr/share/httpd,
SCRIPT_NAME => /index.php,
REQUEST_URI => /legal/cc,
QUERY_STRING => ,
REQUEST_METHOD => GET,
SERVER_PROTOCOL => HTTP/1.1,
GATEWAY_INTERFACE => CGI/1.1,
REDIRECT_URL => /legal/cc,
REMOTE_PORT => 3680,
SCRIPT_FILENAME => /var/www/pulsars/index.php,
SERVER_ADMIN => root@localhost,
CONTEXT_DOCUMENT_ROOT => /var/www/pulsars,
CONTEXT_PREFIX => ,
REQUEST_SCHEME => https,
DOCUMENT_ROOT => /var/www/pulsars,
REMOTE_ADDR => 3.21.159.223,
SERVER_PORT => 443,
SERVER_ADDR => 157.182.3.38,
SERVER_NAME => pulsars.nanograv.org,
SERVER_SOFTWARE => Apache/2.4.37 (Rocky Linux) OpenSSL/1.1.1k,
SERVER_SIGNATURE => ,
HTTP_HOST => pulsars.nanograv.org,
HTTP_ACCEPT_ENCODING => gzip, br, zstd, deflate,
HTTP_USER_AGENT => Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com),
HTTP_ACCEPT => */*,
SSL_TLS_SNI => pulsars.nanograv.org,
HTTPS => on,
SCRIPT_URI => https://pulsars.nanograv.org/legal/cc,
SCRIPT_URL => /legal/cc,
UNIQUE_ID => Zz74aNunFKXLuhDwXUfmGAAAABE,
HTTP_AUTHORIZATION => ,
REDIRECT_STATUS => 200,
REDIRECT_SSL_TLS_SNI => pulsars.nanograv.org,
REDIRECT_HTTPS => on,
REDIRECT_SCRIPT_URI => https://pulsars.nanograv.org/legal/cc,
REDIRECT_SCRIPT_URL => /legal/cc,
REDIRECT_UNIQUE_ID => Zz74aNunFKXLuhDwXUfmGAAAABE,
REDIRECT_HTTP_AUTHORIZATION => ,
FCGI_ROLE => RESPONDER,
PHP_SELF => /index.php,
REQUEST_TIME_FLOAT => 1732180072.114,
REQUEST_TIME => 1732180072
)
separator .
orderBy id
orderDir asc
1 registerIP
2 access
always
renew
tracker.sid f8114493113736e930152d535b534bdf
tracker.ssid f8114493113736e930152d535b534bdf
tracker.rsid f8114493113736e930152d535b534bdf
  • site 0.049 seconds (+0.049); 2.00 MB (+2.000) - afterInitialise
  • site 0.064 seconds (+0.016); 2.00 MB (0.000) - afterRoute
  • site 0.101 seconds (+0.036); 4.00 MB (+2.000) - afterDispatch
  • site 0.108 seconds (+0.008); 4.00 MB (0.000) - beforeRenderModule mod_search (Search)
  • site 0.111 seconds (+0.002); 4.00 MB (0.000) - afterRenderModule mod_search (Search)
  • site 0.111 seconds (+0.000); 4.00 MB (0.000) - beforeRenderModule mod_custom (Footer)
  • site 0.111 seconds (+0.000); 4.00 MB (0.000) - afterRenderModule mod_custom (Footer)
  • site 0.111 seconds (+0.000); 4.00 MB (0.000) - beforeRenderModule mod_custom (Footer social links)
  • site 0.111 seconds (+0.000); 4.00 MB (0.000) - afterRenderModule mod_custom (Footer social links)
  • site 0.112 seconds (+0.000); 4.00 MB (0.000) - beforeRenderModule mod_menu (Legal Menu)
  • site 0.114 seconds (+0.003); 4.00 MB (0.000) - afterRenderModule mod_menu (Legal Menu)
  • site 0.114 seconds (+0.000); 4.00 MB (0.000) - beforeRenderModule mod_menu (Main Menu)
  • site 0.123 seconds (+0.009); 4.00 MB (0.000) - afterRenderModule mod_menu (Main Menu)
  • site 0.124 seconds (+0.001); 4.00 MB (0.000) - onAfterRender
  • site 0.125 seconds (+0.001); 4.00 MB (0.000) - sessionStore
4 MB

26 Queries Logged: 0.032723426818848 seconds

  1. SELECT data
      FROM `jos_session`
      WHERE `session_id` = '1918f96eb342e0c256e2f040f5fc3d42'
  2. DELETE
      FROM `jos_session`
      WHERE `session_id` = '1918f96eb342e0c256e2f040f5fc3d42'
  3. SELECT data
      FROM `jos_session`
      WHERE `session_id` = 'f8114493113736e930152d535b534bdf'
  4. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_languages'
  5. SELECT session_id
      FROM `jos_session`
      WHERE `session_id` = 'f8114493113736e930152d535b534bdf'
      LIMIT 1
  6. INSERT INTO `jos_session` (`session_id`,`client_id`,`time`,`ip`)
      VALUES ('f8114493113736e930152d535b534bdf','0','1732180072','3.21.159.223')
  7. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_members'
  8. SELECT b.id, b.title
      FROM `jos_usergroups` AS `a`
      LEFT JOIN jos_usergroups AS b
      ON b.lft <= a.lft
      AND b.rgt >= a.rgt
      WHERE `a`.`id` = '1'
  9. SELECT *
      FROM `jos_viewlevels`
  10. SELECT folder AS type,element AS name,protected,params
      FROM `jos_extensions`
      WHERE `enabled` >= '1'
      AND `type` = 'plugin'
      AND `state` >= '0'
      AND `access` IN ('1','1')
      ORDER BY `ordering` ASC
  11. SELECT m.id,m.menutype,m.title,m.alias,m.note,m.path AS route,m.link,m.type,m.level,m.language,m.browserNav,m.access,m.params,m.home,m.img,m.template_style_id,m.component_id,m.parent_id,e.element AS component
      FROM `jos_menu` AS `m`
      LEFT JOIN jos_extensions AS e
      ON e.extension_id = m.component_id
      WHERE `m`.`published` = '1'
      AND `m`.`parent_id` > '0'
      AND `m`.`client_id` = '0'
      ORDER BY `m`.`lft` ASC
  12. SELECT jos_template_styles.id,jos_template_styles.home,jos_template_styles.template,jos_template_styles.params,jos_extensions.protected
      FROM `jos_template_styles`
      INNER JOIN jos_extensions
      ON jos_extensions.element = jos_template_styles.template
      WHERE `jos_template_styles`.`client_id` = '0'
      AND `jos_extensions`.`enabled` = '1'
      AND `jos_extensions`.`type` = 'template'
      AND jos_extensions.`client_id` = `jos_template_styles`.`client_id`
      ORDER BY `home` DESC
  13. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_content'
  14. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_categories'
  15. SELECT a.rules
      FROM `jos_assets` AS `a`
      WHERE `a`.`id` = '1'
      GROUP BY a.id, a.rules, a.lft
  16. SELECT b.rules
      FROM `jos_assets` AS `a`
      LEFT JOIN jos_assets AS b
      ON b.lft <= a.lft
      AND b.rgt >= a.rgt
      WHERE `a`.`name` = 'com_content'
      GROUP BY b.id, b.rules, b.lft
      ORDER BY `b`.`lft` ASC
  17. SELECT a.*,a.id,a.asset_id,a.title,a.alias,a.title_alias,a.introtext,a.fulltext,
      CASE WHEN badcats.id IS NULL THEN a.state ELSE 0 END AS state,a.mask,a.catid,a.created,a.created_by,a.created_by_alias,
      CASE WHEN a.modified IS NULL THEN a.created ELSE a.modified END AS modified,a.modified_by,a.checked_out,a.checked_out_time,a.publish_up,a.publish_down,a.images,a.urls,a.attribs,a.version,a.parentid,a.ordering,a.metakey,a.metadesc,a.access,a.hits,a.metadata,a.featured,a.language,a.xreference,c.title AS category_title,c.alias AS category_alias,c.access AS category_access,u.name AS author,parent.title AS parent_title,parent.id AS parent_id,parent.path AS parent_route,parent.alias AS parent_alias,ROUND(v.rating_sum / v.rating_count, 0) AS rating,v.rating_count AS rating_count
      FROM `jos_content` AS `a`
      LEFT JOIN jos_categories AS c
      ON c.id = a.catid
      LEFT JOIN jos_users AS u
      ON u.id = a.created_by
      LEFT JOIN jos_categories as parent
      ON parent.id = c.parent_id
      LEFT JOIN jos_content_rating AS v
      ON a.id = v.content_id
      LEFT
      OUTER JOIN (SELECT cat.id as id
      FROM jos_categories AS cat JOIN jos_categories AS parent
      ON cat.lft BETWEEN parent.lft
      AND parent.rgt
      WHERE parent.extension = 'com_content'
      AND parent.published <= 0
      GROUP BY cat.id) AS badcats
      ON badcats.id = c.id
      WHERE `a`.`id` = '13'
      AND (`a`.`publish_up` IS NULL OR `a`.`publish_up` <= '2024-11-21 09:07:52' )
      AND (`a`.`publish_down` IS NULL OR `a`.`publish_down` >= '2024-11-21 09:07:52' )
      AND `a`.`state` IN ('1','2')
  18. SELECT c.*,
      CASE WHEN CHAR_LENGTH(c.alias) THEN CONCAT_WS(':', c.id, c.alias) ELSE c.id END as slug
      FROM `jos_categories` AS `c`
      LEFT JOIN jos_categories AS s
      ON (s.lft <= c.lft
      AND s.rgt >= c.rgt) OR (s.lft > c.lft
      AND s.rgt < c.rgt)
      LEFT JOIN (SELECT cat.id as id
      FROM jos_categories AS cat JOIN jos_categories AS parent
      ON cat.lft BETWEEN parent.lft
      AND parent.rgt
      WHERE parent.extension = 'com_content'
      AND parent.published != 1
      GROUP BY cat.id) AS badcats
      ON badcats.id = c.id
      WHERE (`c`.`extension` = 'com_content' OR `c`.`extension` = 'system' )
      AND `c`.`access` IN ('1','1')
      AND `c`.`published` = '1'
      AND `s`.`id` = '9'
      AND badcats.id is null
      GROUP BY c.id,c.asset_id,c.access,c.alias,c.checked_out,c.checked_out_time,c.created_time,c.created_user_id,c.description,c.extension,c.hits,c.language,c.level,c.lft,c.metadata,c.metadesc,c.metakey,c.modified_time,c.note,c.params,c.parent_id,c.path,c.published,c.rgt,c.title,c.modified_user_id
      ORDER BY `c`.`lft` ASC
  19. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_users'
  20. SELECT m.id,m.title,m.module,m.position,m.content,m.showtitle,m.params,mm.menuid,e.protected
      FROM `jos_modules` AS `m`
      LEFT JOIN jos_modules_menu AS mm
      ON mm.moduleid = m.id
      LEFT JOIN jos_extensions AS e
      ON e.element = m.module
      AND e.client_id = m.client_id
      WHERE `m`.`published` = '1'
      AND `e`.`enabled` = '1'
      AND (`m`.`publish_up` IS NULL OR `m`.`publish_up` <= '2024-11-21 09:07:52' )
      AND (`m`.`publish_down` IS NULL OR `m`.`publish_down` >= '2024-11-21 09:07:52' )
      AND `m`.`access` IN ('1','1')
      AND `m`.`client_id` = '0'
      AND (`mm`.`menuid` = '96' OR `mm`.`menuid` <= '0' )
      ORDER BY `m`.`position` ASC,`m`.`ordering` ASC
  21. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_search'
  22. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_courses'
  23. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_events'
  24. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_newsletter'
  25. SELECT extension_id AS id,element AS "option",params,enabled
      FROM `jos_extensions`
      WHERE `type` = 'component'
      AND `element` = 'com_psrsearch'
  26. UPDATE `jos_session`
      SET `data` = '__default|a:9:{s:15:\"session.counter\";i:1;s:19:\"session.timer.start\";i:1732180072;s:18:\"session.timer.last\";i:1732180072;s:17:\"session.timer.now\";i:1732180072;s:8:\"registry\";O:23:\"Hubzero\\Config\\Registry\":2:{s:7:\"\0*\0data\";O:8:\"stdClass\":1:{s:1:\"0\";s:7:\"session\";}s:9:\"separator\";s:1:\".\";}s:4:\"user\";C:17:\"Hubzero\\User\\User\":22:{a:1:{s:5:\"guest\";b:1;}}s:11:\"tracker.sid\";s:32:\"f8114493113736e930152d535b534bdf\";s:12:\"tracker.ssid\";s:32:\"f8114493113736e930152d535b534bdf\";s:12:\"tracker.rsid\";s:32:\"f8114493113736e930152d535b534bdf\";}',`time` = '1732180072',`ip` = '3.21.159.223'
      WHERE `session_id` = 'f8114493113736e930152d535b534bdf'
  • onAfterInitialise Method plgSystemP3p::onAfterInitialise /core/plugins/system/p3p/p3p.php:21
  • onAfterInitialise Method plgSystemRemember::onAfterInitialise /core/plugins/system/remember/remember.php:20
  • onAfterInitialise Method plgSystemHubzero::onAfterInitialise /core/plugins/system/hubzero/hubzero.php:21
  • onAfterInitialise Method plgSystemXFeed::onAfterInitialise /core/plugins/system/xfeed/xfeed.php:21
  • onAfterInitialise Method plgSystemSupergroup::onAfterInitialise /core/plugins/system/supergroup/supergroup.php:113
  • onAfterInitialise Method plgSystemReferrerpolicy::onAfterInitialise /core/plugins/system/referrerpolicy/referrerpolicy.php:21
  • onAfterRoute Method plgSystemJquery::onAfterRoute /core/plugins/system/jquery/jquery.php:21
  • onAfterRoute Method plgSystemSpamjail::onAfterRoute /core/plugins/system/spamjail/spamjail.php:21
  • onAfterRoute Method plgSystemIncomplete::onAfterRoute /core/plugins/system/incomplete/incomplete.php:21
  • onAfterRoute Method plgSystemUnconfirmed::onAfterRoute /core/plugins/system/unconfirmed/unconfirmed.php:21
  • onAfterRoute Method plgSystemUnapproved::onAfterRoute /core/plugins/system/unapproved/unapproved.php:21
  • onAfterRoute Method plgSystemPassword::onAfterRoute /core/plugins/system/password/password.php:21
  • onContentPrepare Method plgContentLoadmodule::onContentPrepare /core/plugins/content/loadmodule/loadmodule.php:35
  • onContentPrepare Method plgContentEmailcloak::onContentPrepare /core/plugins/content/emailcloak/emailcloak.php:25
  • onContentPrepare Method plgContentPagebreak::onContentPrepare /core/plugins/content/pagebreak/pagebreak.php:35
  • onContentPrepare Method plgContentXhubtags::onContentPrepare /core/plugins/content/xhubtags/xhubtags.php:25
  • onContentPrepare Method plgContentFormatwiki::onContentPrepare /core/plugins/content/formatwiki/formatwiki.php:63
  • onContentPrepare Method plgContentFormathtml::onContentPrepare /core/plugins/content/formathtml/formathtml.php:105
  • onContentPrepare Method plgContentExternalhref::onContentPrepare /core/plugins/content/externalhref/externalhref.php:41
  • onContentBeforeDisplay Method plgContentPagenavigation::onContentBeforeDisplay /core/plugins/content/pagenavigation/pagenavigation.php:25
  • onContentBeforeDisplay Method plgContentVote::onContentBeforeDisplay /core/plugins/content/vote/vote.php:32
  • onAfterDispatch Method plgSystemMobile::onAfterDispatch /core/plugins/system/mobile/mobile.php:22
  • onAfterDispatch Method plgSystemDebug::onAfterDispatch /core/plugins/system/debug/debug.php:60
  • onAfterDispatch Method PlgSystemHighlight::onAfterDispatch /core/plugins/system/highlight/highlight.php:25
  • onAfterRender Method plgSystemSef::onAfterRender /core/plugins/system/sef/sef.php:21