Jumat, 16 Juli 2010

Nuklir Indonesia

Disusun Ulang Oleh:

Arip Nurahman

Pendidikan Fisika, FPMIPA Universitas Pendidikan Indonesia

&

Follower Open Course Ware at MIT-Harvard University, Cambridge. USA.

A nuclear power plant (NPP) is a thermal power station in which the heat source is one or more nuclear reactors. As in a conventional thermal power station the heat is used to generate steam which drives a steam turbine connected to a generator which produceselectricity.

Nuclear power plants are usually considered to be base load stations, which are best suited to constant power output.

For more history, see nuclear reactor, nuclear power and nuclear fission.

Electricity was generated for the first time ever by a nuclear reactor on December 20, 1951 at the EBR-I experimental station near Arco, Idahoin the United States. On June 27, 1954, the world's first nuclear power plant to generate electricity for a power grid started operations atObninsk, USSR.[1] The world's first commercial scale power station, Calder Hall in England opened in October 17, 1956.[2]


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Minggu, 04 Juli 2010

Komputer dan Internet

Asalamualikum wr.wb.

Hallo Teman-teman ini adalah aplikasi khusus untuk Internet dan Komputer

10 Solid Tips to Safeguard Your Facebook Privacy

Facebook statistics show that it has 250 million active users each with an average 120 friends. More than 1 billion photos are uploaded every month by its users, over 70% of whom use applications like games and quizzes in Facebook. Unfortunately, most users don’t know the implications of entering personal information, making friends, and playing games on Facebook.

This guide will show what you can (and cannot) do to safeguard your Facebook privacy.

1. Organize Friends in Lists

What do you do when your boss, mother-in-law, or a casual web acquaintance sends you a friend request on Facebook? Use Friend Lists. Friend Lists are the foundation of your Facebook privacy settings. Select Friends from the top menu, and use the Create link to create friend lists like Co-workers, Family, College Friends, etc. Your friends can’t see your lists, so you can name them whatever you like.

facebook privacy

Tip: On your left sidebar, all your friend lists may not show up by default. Click More to see all of them, and drag and drop those you want above the separator.

2. Customize Profile Privacy

Click Settings > Privacy Settings > Profile. Select which parts of your profile will be seen by whom.

facebook privacy Profile

If you choose Customize in the drop down, you can be more specific. This is where the Friend Lists you created before become really useful.

facebook privacy Customize

Also go to the Contact Information tab and choose how you want your contact information to be shared on the Internet.

3. Set Facebook Privacy Level of Photo Albums

On the Photos tab of your profile page, click Album Privacy. Here again, you can use your Friend Lists to set the privacy for each photo album.

facebook privacy - Albums

Note that your profile pictures go into a special album that is always visible to ALL your friends.

4. Restrict Search Visibility

Click Privacy > Search to set your visibility when someone searches Facebook for people. This is an important way to safeguard your Facebook privacy. You can also select what will be visible in the search results.

facebook privacy - search

5. Control Automatic Wall Posts and News Feed Updates

Your actions in Facebook such as comments, likes, appear as highlights on ALL your friends’ home pages. You cannot use friend lists here, only turn them on or off.

Privacy News Feed

Go to Privacy > News Feed and Wall and choose whether you want your boss or ex-girlfriend to know that you’re in a relationship.

6. Set Facebook Wall Privacy

Go to your profile page, click Options > Settings under the status box.

Wall Privacy

Here you can control whether your friends can post to your Wall, and who can see the posts made by your friends.

7. Avoid Appearing in Advertisements

Facebook has two types of advertisements: third-party and Facebook. Third-party advertisements are currently not allowed to use your pictures, but there is a setting to disallow it if it is allowed in the future. Go to Privacy > News Feed and Wall > Facebook Ads tab to turn this off.

Privacy Third Party Ads

The Facebook ads shown to your friends are about ‘social actions’ like becoming a fan of something. You can turn this off at the bottom of the page.

8. Protect Yourself from Friends’ Applications

Go to Privacy > Applications, and click the Settings tab and uncheck all the boxes. These settings control what information about you is visible to applications installed by your friends. By default, these are set to visible. This means that your religious, sexual, and political preferences, pictures, etc. are readily available to one of the million worldwide Facebook application developers, each time any of your friends takes a quiz, plays a game, or runs any other Facebook app. This is obviously a Facebook privacy issue.

Privacy Applications

This is the most commonly misunderstood aspect of Facebook privacy. These settings control what applications installed by your friends can see about you, even if you don’t install the application yourself.

Why is this important? Because these settings will not change anything about what you are sharing with the applications you install yourself. For that, go to the next step.

9. Privacy from Your Applications

There is no way to control what applications see about you; it is an all-or-nothing affair. Takethis quiz developed by the American Civil Liberties Union to check what anonymous application developers can know about you and your friends each time you take a quiz.

The Burton Group’s Identity Blog features the Facebook Privacy Mirror, an application that you can use to find out what applications know about you and your friends. If you really want to see exactly what profile data of each of your friends is visible to application developers, Privacy Mirror shows it in detail.

The only thing you can do is to authorize only those applications you require and trust. Go toSettings > Application Settings from the top menu. Change the drop-down from Recently Usedto Authorized. Here you can see all the applications you have authorized to get access to ALL your profile information. Remove the ones you no longer need.

Authorized Apps

Also check the list of applications Allowed to Post and Granted Additional Permissions to remove unwanted ones.

10. Quitting Facebook? Delete, Don’t Just De-Activate Your Account

You can easily deactivate your account in Facebook from the Settings page. But deactivation will retain all your profile information within Facebook, including pictures, friends, etc. If you want to permanently delete your Facebook account, click here to submit a deletion request. Note that:

  1. There is an unspecified delay between submitting your delete request and actual deletion.
  2. If you login to Facebook, your deletion request is automatically cancelled.
  3. There doesn’t seem to be any way to confirm that your request was completed.
  4. Even after permanent deletion, Facebook says that copies of your photos may remain on their servers for technical reasons.

Also, note that once in a while, there is news of a Facebook hack or leak that can expose your information on the Internet. It is better to be safe than sorry by avoiding using Facebook for anything that may embarrass you.

I hope this article gives you a better understanding and insight into Facebook’s privacy. Have any questions or concerns? Liked the post? Please tell us in the comments!