User:Panlekha

Panlekha Horsin

Tianhe-I
Tianhe-I, Tianhe-1, or TH-1, in English, "Milky Way (literally, Sky River) Number One", is a supercomputer capable of an Rmax (maximum range) of 2.566 petaFLOPS; that is, over 2½ quadrillion (thousand million million) floating point operations per second, or FLOPS. Located at the National Supercomputing Center in Tianjin, China, it is one of the fastest computers in the world and one of the few Petascale supercomputers in the world.

Tianhe-1A is composed of 7168 nodes, each featuring two Intel Xeon X5670 2.93 GHz 6-core "Westmere" processors, and one Nvidia Tesla M2050 448-ALU 1150 MHz "Fermi" graphics processing unit, for a total of 14336 CPUs and 7168 GPUs. There is an additional set of 2048 Galaxy "FT-1000" 1 GHz 8-core processors integrated to the system in an unknown way. Tianhe-1A achieves a practical performance of 2507 double precision TFLOPS with a theoretical peak of 4702 TFLOPS (both numbers exclude the FT-1000 processors)

7168 nodes * (11.733 GFLOPS per core * 6 CPU cores * 2 sockets + 515.2 GFLOPS per GPU) = 4702.21 double precision TFLOPS

The supercomputer is described as having 202752 heterogeneous cores (this time including the FT-1000 processors —I will re-iterate my previous complaint that these statistics are inconsistent in how extra hardware is either included or excluded from FLOPS and cores numbers):

7168 nodes * (12 processor cores + 14 SIMD units) + 2048 FT-1000 processors * 8 cores = 202752 cores

Tianhe-1A was designed by the National University of Defense Technology (NUDT), installed at the National SuperComputer Center in Tianjin (NSCC-TJ), consumes 4.04 MW of electricity, and comprises 103 rack cabinets. [Update 2010-11-16: Some sources state 112 racks.]

Resource : http://www.top500.org/blog/2009/11/13/tianhe_1_chinas_first_petaflop_s_scale_supercomputer

= The Best Operating System On Smart Phone =

Android
Android is an application-centric platform, therefore you’ll find icons displayed prominently on the main screen. Android uses a stripped down and simple screen with the ability to delete or move app icons, except for three fixed icons: The Web app, the Application Tray and the Dialer. Android smartphones have four physical buttons at the bottom of the screen, such as to bring up context menu, return to Home screen, go back to the previous screen and perform a search. By default, including the home screen, Android has five built-in panes. To move among them you can either slide your finger or touch dots under the screen. You can customize each pane, for example by devoting one pane for news and feeds, another to social networking, and so on. For most users, the interface is straightforward and simple.
 * User Interface

Apps openness can offer more variety for users, as some subjects and contents are not allowed by Apple’s guideline. Recently, Android Market pulled more than 50 infected apps, which can do unintended things such as sending user’s critical information to certain people.Android openness is not only limited on the applications policy, in fact, wireless providers and manufacturers can make some modifications that suit their needs.
 * Apps and Openness

Many people are living in the Google-centric world, which may make Android a more appealing platform for them. Out of the box, the Google’s OS automatically syncs and integrates with all available Google services, especially Gmail, Google Calendar and Google Contacts, As a matter of fact, when you’re powering an Android device, it works inside your Google account.If you use Android, it is likely that your desktop or laptop is Windows-based, which means you are stuck with Windows Media Player to synchronize songs, which isn’t exactly the most elegant synchronization tool around. However, Android offers a number of features that are not available in iOS such as voice control and voice search features, so it’s possible to compose email, search the Web and make phone calls through voice alone.
 * Service and Integration

Furthermore, Android 2.3 introduces NFC (Near Field Communication) technology, a potentially useful, emerging short range wireless technology, which can do things that Bluetooth currently can’t. For example, a NFC device allows you to swipe a tag to launch a video, open a Web site, and download apps. However, the NFC will be used prominently to make transactions easier by using the phone to replace credit or debit cards.

Android offers a wide range of widgets, which are smaller and simpler than typical apps, they are useful to display Web information and perform targeted tasks. For example, with Power Control widget, you can adjust the phone’s behavior such as, turning Wi-Fi or Bluetooth on or off, putting the phone into airplane mode and enabling automatic syncing. Other usefulswidgets are Youtube, Google News, Google Search and Weather.

Android 2.3 also offers tethering via Bluetooth, USB or Wi-Fi, which allows you to share Internet connection with other devices. To use this feature, often you’re required to pay an additional fee that can be as high as $20 per month. However, some carriers, like Verizon chooses to eliminate this feature on their customized Android version.

Android is an open and highly customizable OS. When you use an Android device, its customizability is evident immediately. In fact, Android is built around customization features. A typical Android phone has four physical buttons under the screen; Go Back, Home, Search and Menu. If you’re a tweaker, the Menu button is probably the most important button of all. When you’re using an app, by pressing the Menu button, you can access settings to make changes. For example, when you’re using the Gmail app, with the Menu button, you can refresh listing, add or edit account, compose an e-mail, make search for specific messages, and filter by label. With an app, such as Tweetdeck, the Menu button allows you to refresh your Twitter feed, add/edit accounts, tweak column settings and change font sizes.
 * Customization

Android is bristled with ways to tweak the phone’s main interface. Furthermore, with its openness, developers, service providers, phone manufacturers can further tweak and modify the interface based on their requirements and goals. For example, Droid X and Droid 2 offer seven panes, while stock Android OS only offers five. On those phones, each pane comes with its own built-in widgets, some are standard Android widgets and some others are Motorola’s creation. These widgets are highly customizable and can display various information, such as upcoming meetings, latest email messages and many others.

Resource :http://www.techwench.com/a-complete-guide-on-choosing-the-best-smartphone-os-for-summer-2011/