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The following has been adapted from the World IPv6 Day page, hosted by the Internet Society (ISOC).

What is World IPv6 Day?

World IPv6 day, scheduled for 8 June 2011, is a global-scale test flight of IPv6 sponsored by the Internet Society. On World IPv6 Day, major web companies and other industry players will come together to enable IPv6 on their main websites for 24 hours. The goal is to motivate organizations across the industry — Internet service providers, hardware makers, operating system vendors and web companies — to prepare their services for IPv6 to ensure a successful transition as IPv4 address space runs out.

Click here to see the start time in your local area.

Why is World IPv6 Day necessary?

The address space used by the current version of the Internet protocol, IPv4, is expected to run out in 2011. Without action, we risk increased costs and limited functionality online for Internet users everywhere. The only long-term solution to this problem is adoption of IPv6, which provides over 4 billion times more space. IPv6 is used extensively in many large networks, but it has never been enabled at a global scale. World IPv6 Day will help industry players work together to support the new protocol on an accelerated timeline. With major web companies committing to enable IPv6 on their main websites, there are strong incentives for other industry players to ensure their systems are prepared for the transition.

How, specifically, does World IPv6 Day help motivate change and test the technology?

World IPv6 Day will act as a focal point to bring existing efforts together. For the first time, players from all parts of the industry will be be able to work towards the common goal of enabling IPv6 at a large scale with minimal disruption. By acting together, ISPs, web site operators, OS manufacturers, and equipment vendors will be able to address problems, such as IPv6 brokenness in home networks and incomplete IPv6 interconnection. Also, on the day itself, any global scalability problems can be found in a controlled fashion and resolved cooperatively.

What, specifically, still needs to happen for the industry to effectively transition to IPv6?

All major Internet industry players will need to take action to ensure a successful transition. For example:

  • Internet service providers need to make IPv6 connectivity available to their users
  • Web companies need to offer their services over IPv6
  • Operating system makers may need to implement specific software updates
  • Backbone providers may need to establish IPv6 peering with each other
  • Hardware and home gateway manufacturers may need to update firmware

How will World IPv6 Day impact Internet users?

One of the goals of World IPv6 Day is to expose potential issues under controlled conditions and address them as soon as possible. The vast majority of users should be able to access services as usual, but in rare cases, misconfigured or misbehaving network equipment, particularly in home networks, may impair access to participating websites during the trial. Current estimates are that 0.05% of users may experience such problems, but participating organizations will be working together with operating system manufacturers, home router vendors and ISPs to minimize the number of users affected. Participants will also be working together to provide tools to detect problems and offer suggested fixes in advance of the trial.

What can Internet users do to get ready for World IPv6 Day?

Most Internet users will not be affected. Web services, Internet service providers, and OS manufacturers will be updating their systems to ensure Internet users enjoy uninterrupted service. In rare cases, users may still experience connectivity issues when visiting participating Websites. Users can visit an IPv6 test site to check if their connectivity will be impacted. If the test indicates a problem, they can disable IPv6 or ask their ISPs to help fix the problem.

What if I have a problem connecting to a participating web service. What can I do?

It’s very unlikely you will be impacted by IPv6 Day. Current estimates are that 0.05% of users may experience connectivity issues, and participating organizations will be working together with operating system manufacturers, home router vendors and ISPs to minimize the number of users affected. You can test your Internet connection ahead of IPv6 Day here. In the unlikely event you have problems on IPv6 Day, the best thing to do is to contact your ISP for support. In the coming months, participating organizations will be working together to publish help guides with more specific instructions for diagnosing and addressing potential issues.

What exactly needs to get fixed? Operating systems? Web browsers? Home routers? ISPs?

In some cases, it’s as simple as staying current with the latest updates to your operating system. In other cases, you may need to toggle a control panel setting or update the firmware (software) on your home router. If your ISP does not yet offer IPV6, and you are savvy with technology, see the 6to4 link page for recommendations.

Are participants going to disable IPv4 on World IPv6 Day?

No. Participating websites will not switch from IPv4 to IPv6, they will enable IPv6 in addition to IPv4. IPv4 access will still be available as usual.

Why are websites turning IPv6 off after 24 hours?

One of the main purposes of the test flight is to enable website owners to assess the ability of end users to reach their websites. It is essential for websites to analyze impact before and after in order to make a longer term impact assessment and overall plan. This 24 hour period will help the Internet community continue to improve IPv6.

Should I enable end-user IPv6 access on June 8?

If you are planning to turn on IPv6 for access in your network in the interest of World IPv6 Day, please ensure your adds are completed well before the day (e.g., before May 31), and commit to leaving it active. Turning on IPv6 for only a brief period around June 8th will confuse measurements and not give a clear idea of the world’s readiness for IPv6 and IPv4 coexistence: it is therefore not a contribution to the effort.

What can organizations do to join World IPv6 Day?

We welcome additional participants. Find out how to participate.

What if says I will be affected on World IPv6 Day?
“Broken” users will be suggested to check our Broken user FAQ.
by Joost de Valk on 30 May, 2011 at 13:45 83 comments

There have been some questions after the release last weekend of the new XML sitemaps implementation in WordPress SEO. Let me try to address most of those questions in one post as well as explain the ideas behind it.

The basic idea behind the rebuild of the XML sitemap functionality was simple: XML sitemaps needed to be more scalable, have a better API and cause less issues. Most of the issues were caused by two causes:

  1. the fact that I was writing XML sitemaps to disk as static files;
  2. the fact that I tried to generate one huge sitemap to catch everything.

Both of these were not really design decisions, just how it “turned out” when I had built the functionality and they turned out to be stupid. So, with the help of the incredibly talented Jon Cave, a WordPress core dev from the UK, the XML sitemap functionality has been rebuilt. It now has an index sitemap file that points to several sitemaps, one for each post type and taxonomy.

If you have more than 1,000 posts in a post type, for instance more than 1,000 posts, it will automatically start splitting these sitemaps up into 1,000 posts sitemaps, so as to reduce the load time per sitemap. These sitemaps are generated in a completely new way, on the fly, without caching them to disk. This means there won’t be a delay anymore (caused by the generation process) when you publish a new post.

The sitemap index file can always be found at sitemap_index.xml, a link to that can be found from the new XML sitemaps menu.

The new code also means there’s a great new API for XML sitemaps, which will first be used in the Google News module. Documentation for that is coming. Because of a new filter in the code, NextGen Gallery will now also be able to add its images into the sitemap, so all of your images can be found by Google.

FAQ regarding the new XML Sitemaps functionality

  • Why do I get a 404 when opening the sitemap_index.xml file?
    You probably have W3 Total Cache active, that is preventing 404 errors for static files to go through to WordPress. Update to the latest version of W3 Total Cache or add, under the browser cache page, this exemption:

  • Why do I get an error saying “not a valid feed template”?
    You’re probably using a Woothemes tumble-style theme,  check with Woothemes about an update, they’re using a very general rule for XML sitemaps in their old code. Or, if you’re a developer, go and find a file that’ll probably be called /includes/tumblog/theme-tumblog.phpand fix / remove the line that looks like this:

    '(.+).xml' => 'index.php?feed='. $wp_rewrite->preg_index(1)
  • Why does my sitemap show as type “images” in GWT?
    Because images are contained within the sitemap, and Google Webmaster Tools then immediately shows it as type “images”. There is no “midex” type in Google Webmaster Tools at the moment.
  • Which sitemap should I submit to Google Webmaster Tools?
    The index file, sitemap_index.xml, should be submitted to Google Webmaster Tools automatically if you have the ping setting for Google on. You’ll then find the sitemap under the “All” links, in the right hand side on GWT:
    You’ll then be able to click on the sitemap_index.xml file and see the sub sitemaps and indexation per sub sitemap.
  • So there’s no sitemap.xml file anymore?
    No, correct. This change was made to prevent collisions with other sitemaps, something that happened quite regularly. You can safely remove it from Google Webmaster Tools and other search engine portals.
  • What to do with the wp-content/uploads/wpseo/ folder?
    You can safely remove it, as said the plugin no longer writes static files.
  • The plugin doesn’t add anything to the .htaccess file?
    No it doesn’t, the rewrites for the files are handled with WordPress internals.
  • The plugin doesn’t add the sitemap to the robots.txt file!
    No it doesn’t. There’s no real good reason to do that when you’re pinging the search engine of changes with the sitemap. In my experience it only helps scrapers find new content on your site. The fact that another XML sitemap plugin does do that doesn’t make it better nor a requirement.
  • Is there a .gz version of the sitemaps file?
    No, but if you run a caching plugin like W3 Total Cache the output will be gzipped anyway.
by Joost de Valk on 31 May, 2011 at 15:00

It seems every “premium” WordPress theme these days calls itself “SEO friendly”. They’re usually not. In fact, most are crap, I’m sorry to say. So I thought I’d lay down some WordPress SEO Theme “Rules” or “Guidelines”. If you’re not abiding by those rules, you’ll never get the “Yoast says it’s SEO friendly” sticker, sorry.

Ok so these guidelines will consist of WordPress SEO Theme “Do’s” and “Don’ts”, starting out with the don’ts:

WordPress SEO Theme Don’ts

  1. Put the site’s name first in the title tag.
    WordPress SEO Theme Guidelines

    The title tag should be post title – site title or a variation on that, but the only variation you do not want in a WordPress SEO Theme is the exact opposite: site title – post title.

  2. Add a static meta description to pages.
    I see this so often now: people complain that my WP SEO plugin doesn’t work because the meta description isn’t showi ng, but in fact, their theme contains a static meta description that is the same on each bloody page.
  3. Don’t add static robots meta tags or anything else that’ll hamper search engines.
    Same as above, please don’t add meta robots tags, “index,follow” is what Google will do by default and if you include it in your theme statically, a user cannot use a plugin to make a page un-indexable, for instance.
  4. Use the H1 for the logo, on every page.
    The H1 should be used for the most important heading on the page. In most cases, that is the article title, not the logo, on every page but the homepage. There’s a lot more to say about headings, which I’ve done in my HTML Heading Structure article.
  5. Don’t hide links in the theme.
    This one might be obvious but still: don’t hide any links in your theme that don’t belong there. One link to you as the theme creator: ok, anything else: nonsense.
  6. Have sidebars above the content in your code.
    In an ideal world, the first content in the HTML is the content of the page, followed by related navigation, then sidebars, then site navigation, then utilities like sitemaps and privacy statements. Having sidebars above the main content of a page though is a straight violation of the WordPress SEO Theme guidelines.

WordPress SEO Theme Do’s

  1. Allow taxonomy descriptions to be shown.
    In most themes, taxonomy archives are boring as hell. They have no unique content whatsoever and just contain the latest posts for that taxonomy. WordPress has a core feature that allows for a description of a taxonomy though, and a good WordPress SEO Theme should allow the user to display that description, topped by an H1 with the Taxonomy title in it.
  2. Show excerpts on archives.
    Archive pages with full-length posts are not really any good for SEO, doing so on your frontpage for the last few posts might have some usability benefit, allowing users who come to your homepage to read posts immediately, for archives that benefit doesn’t outweigh the SEO.
  3. Allow for breadcrumbs.
    Most any SEO these days will tell you breadcrumbs are a nice and easy way to create a good internal linking structure (provided the user uses the taxonomies etc. right of course) so embedding breadcrumbs is important. Making sure they work with custom taxonomies is important too!
  4. Use the post title as the first anchor text.
    Don’t use “read more” or “continue reading” as the first anchor text towards a post, not in the body, not in widgets, nowhere. Just use the post title.
  5. Clean, cleaner, cleanest.
    Your theme code should be as clean as humanly possible, don’t overdo it on divs etc. for styling, just keep it simple and solid, to allow for fast page loads and easy crawling.

Unneeded functionality

I’ve said it before and I’ll say it again: there’s no need to put SEO functionality for titles and descriptions in your theme. There are a couple of very good plugins that can do that better than your theme ever can. While I wouldn’t distract any points for it, I’d rather you focus on great code for your theme.

WordPress SEO Theme Scan

Starting today, I’m offering a WordPress SEO Theme scan. I’ll review a WordPress theme and tell you whether it’s SEO friendly or not. I’ll do that in a post on this site, in a similar fashion to my WordPress plugin reviews with a 1 – 5 star rating. If you’re the author of the theme you’ll get a badge to use on your own site that you can use to show off my rating.

I’ll start this service at the introductory price of $300 and it’ll go up to $450 later on. If you’ve got multiple themes you’d like me to review, contact me for pricing.

Jakarta, – Untuk memperingati “Hari Bumi” yang jatuh pada tanggal 22 April 2011 nanti, APC by Schneider Electric mewujudkan kepedulian terhadap penggunaan dan efisiensi energi dengan memberikan 20 tips penggunaan komputer yang ramah lingkungan untuk Anda.

APC by Schneider Electric, pemimpin global dalam layanan critical power dan cooling terintegrasi, melihat  bahwa penggunaan komputer  dalam kehidupan kita sehari-hari, baik untuk bekerja, hiburan dan melakukan aktivitas sosial, sangatlah tinggi. Kecenderungan ini mengakibatkan penggunaan energi yang tinggi dan kenaikan biaya yang signifikan setiap tahunnya.

Terdapat kesalahan persepsi atau mitos penggunaan komputer yang sering terjadi pada penggunaan sehari-hari, termasuk salah satunya adalah anjuran untuk tidak mematikan komputer.

Sebenarnya komputer dirancang untuk menghadapi siklus on/off 40.000 kali, dan apabila komputer digunakan secara normal maka komputer dapat berusia dari lima hingga tujuh tahun. Sehingga dengan mematikan komputer, kita tidak hanya mengurangi penggunaan energi, tetapi juga mengurangi heat stress pada komputer.

Anggapan kedua yang banyak beredar mengatakan bahwa dengan mematikan dan kembali menyalakan komputer akan lebih banyak menggunakan energi daripada meninggalkannya dalam keadaan menyala.

Sedangkan pada kenyataannya, penggunaan energi yang digunakan CPU untuk melakukan boot up jauh lebih sedikit dibandingkan dengan meninggalkan komputer menyala lebih dari tiga menit.

Mitos lain yang paling sering terjadi adalah persepsi bahwa dengan menggunakan screen saver akan menghemat energi.

Sedianya, screen saver dirancang untuk membantu memperpanjang usia monitor monochrome sedangkan kini kebanyakan monitor menggunakan teknologi obsolete. Sebenarnya screen saver dapat menghemat energi hanya jika mematikan layar atau pada laptop, mematikan backlight.

Selain itu, anggapan bahwa koneksi jaringan akan terputus pada saat komputer dalam kondisi low-power/sleep mode juga tidak benar. Komputer – komputer baru dirancang agar tidak mengalami kehilangan koneksi atau data meskipun dalam keadaan sleep mode.

CPU yang dilengkapi dengan teknologi Wake on LAN (WOL) dapat ditinggalkan dalam keadaan sleep mode semalaman dan keesokan harinya pengguna telah menerima data yang dikirim.

Karena hal itulah maka APC by Schneider Electric memberikan tips dalam menggunakan komputer secara efisien untuk menghemat biaya, memperpanjang usia perangkat komputer dan menyelamatkan bumi ini. Berikut ini adalah uraian tips yang rangkum untuk Anda;

  1. Matikan komputer di malam hari sehingga komputer hanya digunakan selama 8 jam – untuk menghemat penggunaan energi hingga 810kWh per tahun dan 67 persen penggunaan.
  2. Sambungkan komputer anda ke surge protector dengan master control outlet, sehingga secara otomatis dapat mengetahui saat komputer tidak digunakan untuk kemudian memutus sambungan listrik ke komputer dan perlengkapannya.
  3. Belilah layar datar – karena layar datar menggunakan lebih sedikit energi dan tidak membuat mata bekerja lebih keras seperti pada CRT.
  4. Belilah komputer yang dilengkapi Energy Star. Sebagai catatan, laptop menggunakan lebih sedikit energi dibandingkan desktop.
  5. Rencanakan penggunaan komputer sehingga semua kegiatan dapat diselesaikan dalam satu waktu, dan matikan saat tidak agi digunakan.
  6. Pertimbangkan menggunakan monitor yang lebih kecil – monitor berukuran 14 inci menggunakan 40 persen energi lebih rendah dibandingkan dengan monitor 17 inci.
  7. Aktifkan mode standby/sleep dan pengaturan penggunaan energi.
  8. Lupakan screen saver – screen saver tidak menghemat energi kecuali masih menggunakan monitor monochrome yang lama.
  9. Lihat ulang rancangan dokumen dan email pada layar dari pada mencetaknya.
  10. Matikan monitor saat tidak digunakan dari pada menggunakan screen saver.
  11. Pertimbangkan untuk menggunakan printer ink-jet – walaupun lebih lambat dari pada menggunakan printer laser, tapi inkjet menggunakan 80-90 persen energi lebih sedikit.
  12. Belilah produk tinta yang berbahan dasar dari tumbuhan atau non-minyak – karena produk tersebut dibuat dari sumber yang didaur ulang, membutuhkan lebih sedikit penggunaan materi berbahaya dan menghasilkan warna yang lebih terang dan jernih.
  13. Matikan printer dan semua perangkat pelengkap lainnya apabila tidak digunakan.
  14. Jangan biarkan komputer tetap menyala pada malam hari atau pada akhir minggu.
  15. Pilihlah warna yang gelap sebagai latar belakang tampilan layar, karena tampilan warna terang menggunakan lebih banyak energi.
  16. Kurangi tingkat pencahayaan ruangan pada saat bekerja menggunakan komputer.
  17. Gunakan jaringan dan share printer apabila memungkinkan.
  18. Cetaklah dengan menggunakan kertas daur ulang. Gunakan kertas yang tidak menggunakan klorin dengan 50 hingga 100 persen post-consumer waste.
  19. Cetak di dua sisi kertas.
  20. Komunikasi melalui email sebagai alternatif pengganti memo dan fax.

Apple Inc. (NASDAQAAPLNYSEAAPL; previously Apple Computer, Inc.) is an American multinational corporation that designs and marketsconsumer electronicscomputer software, and personal computers. The company’s best-known hardware products include the Macintosh line of computers, the iPod, the iPhone and the iPad. Apple software includes the Mac OS X operating system; the iTunes media browser; the iLife suite of multimedia and creativity software; the iWork suite of productivity software; Aperture, a professional photography package; Final Cut Studio, a suite of professional audio and film-industry software products; Logic Studio, a suite of music production tools; the Safari internet browser; and iOS, a mobile operating system. As of August 2010, the company operates 301 retail stores[4] in ten countries,[5] and an online store where hardware and software products are sold.[6] As of May 2010, Apple is one of the largest companies in the world and the most valuable technology company in the world, having surpassed Microsoft.[7]

Established on April 1, 1976 in CupertinoCalifornia, and incorporated January 3, 1977,[8] the company was previously named Apple Computer, Inc., for its first 30 years, but removed the word “Computer” on January 9, 2007,[9] to reflect the company’s ongoing expansion into the consumer electronics market in addition to its traditional focus on personal computers.[10] As of September 2010, Apple had 46,600 full time employees and 2,800 temporary full time employees worldwide[2] and had worldwide annual sales of $65.23 billion.[2]

For reasons as various as its philosophy of comprehensive aesthetic design to its distinctive advertising campaigns, Apple has established a unique reputation in the consumer electronics industry. This includes a customer base that is devoted to the company and its brand, particularly in the United States.[11] Fortune magazine named Apple the most admired company in the United States in 2008, and in the world in 2008, 2009, and 2010.[12][13][14]The company has also received widespread criticism for its contractors’ labor, environmental, and business practices.[15][16]

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