The pros and cons Apple Ipad

We know that Apple Inc., is one company that is always innovating with various types of gadgets and software and IT devices that are not only functional but also support the lifestyle. everything which was launched by Apple have always been a trendsetter of the world.

Various products has become a trendsetter, starting denganMacbook trust which has become a tool for graphic design, the iPod - the best-selling portable media player in the world to successfully subvert the Sony Walkman as the king of portable media players before, the iPhone - stylish phone to be proud of its users with touchscreen features a very intuitive and user friendly.

In addition, Apple Inc. Thus also famous for the MacOS operating system is also very user friendly, elegant design, equipped with advanced features, and not susceptible to viruses as Microsoft Windows. Itunes software is also not less menghebohkannya, which change the paradigm of music lovers in the world, where keeping the CD is not the best way to have a song from his favorite singer.

On January 27, 2010 that then, Apple Inc. announced its newest product called the iPad, a tablet computer that is strengthened with the OS that is used on the iPhone. In general, this device is a development of the iPod Touch and iPhone, although the function of the phone is not pinned on this gadget. This device is returned to be one that has been awaited gadget lovers worldwide IT.
On April 3, 2010, which then, this device was officially launched although unfortunately only limited to the area of the United States. On the first day of sales of hundreds of people willing to queue for hours, even to stay in front of the store to compete to be the first to have these gadgets, as seen at the launch of Apple Inc. products. earlier, and total around 300,000 units changing hands to the buyer within 1 day.

Then, what is the advantages that such a best-selling iPad? Let us refer to the excellent features that make it as a gadget with a variety of advantages over its competitors.

Apple iPad superior features:

• Display 9.7-inch LED multitouch, Resolution 1024 × 768 pixels by 132 pixels per inch, supporting the development of many languages and characters simultaneously
• Battery Apple iPad Endurance up to 10 hours of active time and one month standby time
• Wireless Connection Apple iPad will be available in a variety of connection options. In terms of wireless data connection, the iPad will have the ability 802.11n WiFi and 3G connections as well (on a certain type).
• Safari browser for Web access.
• Mail to read your e-mail.
• Photos to manage the photo archive.
• Video to play video files.
• YouTube to view videos directly to YouTube without going through the web.
• iPod to play music
• iTunes to download music and videos
• App Store for applications mengunduk
• iBooks to read and download e-book from iBooks Store
• Maps to view high-resolution maps from satellite and Street View Images.
• Notes to take notes freely.
• Calendar to the agenda.
• Contacts to record data phone, email, and web-friends.
• Home screen to set the display screen
• Spotlight search for quick searching in all parts just by typing in keywords.

Even so, Apple iPad still considered to have many shortcomings. This is the reason for consumers to not rush to adopt the sleek gadget from Apple.

Some weaknesses iPad:

• Display size is not too large (4:3 aspect ratio, smaller than the standard 16:9 as in iPod)
• No multitasking
• No cameras
• Keyboard touch
• No HDMI port
• Does not support Adobe Flash
• No USB port
• Does not support T-Mobile 3G (using microSIM are rarely used in any device)
• Only able to play 480p video
• No Full GPS (only enter the A-GPS via Wi-Fi and 3G)
• No slot SDCARD
• No Open SDK (Software Development Kit)
• The battery can not be replaced

Among the line of weakness, the lack of Adobe Flash on the iPad become one of the weaknesses of the most dicecar various circles. PC World even wrote a comparison iPad, which without Flash, with HP Slate, which supports Flash. Alan Tam from Adobe demonstrates HP's Slate of accessing a web site in full and "not just a part of that website." This is because Slate using Flash.

Tam explained that 85 percent of the 100 leading web site using Adobe Flash, and 75 percent of all videos on the Web site relies on Flash technology. These statistics may seem less profitable for the iPad. Nevertheless, it does not change the fact that users will still be able to watch iPad videos on YouTube, listen to streaming music from Pandora, or interact with the web as it has done the users of iPhone or iPod Touch.

Over the years, still according to PC World, yet there are users who actually complain about the lack of Flash on the two devices are also manufactured Apple's. iPad is no escape from weakness. But the fact is, he also has many advantages.

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Wi-Fi on the Command Line

More people than ever are using wireless networks as their primary networking medium. Great programs are available under X11 that give users a graphical interface to their wireless cards. Both GNOME and KDE include network management utilities, and a desktop-environment-agnostic utility called wicd also offers great functionality. But, what if you aren't running X11 and want to manage your wireless card? I don't cover how to install and activate your card here (for that, take a look at projects like madwifi or ndiswrapper). I assume your card is installed and configured properly, and that it is called wlan0. Most of the utilities mentioned below need to talk directly to your wireless card (or at least the card driver), so they need to be run with root privileges (just remember to use sudo).

The first step is to see what wireless networks are available in your area. A utility called iwlist provides all sorts of information about your wireless environment. To scan your environment for available networks, do the following:

sudo iwlist wlan0 scan

You'll see output resembling:

Cell 01 - Address: 00:11:22:33:44:55

          ESSID:"network-essid"

          Mode:Master

          Channel:11

          Frequency:2.462 GHz (Channel 11)

          Quality=100/100  Signal level:-47dBm  Noise level=-100dBm

          Encryption key:off

          .

          .

          .

The details (address and essid) have been changed to protect the guilty. Also, the ... represents extra output that may or may not be available, depending on your hardware. You will get a separate cell entry for each access point within your wireless card's range. For each access point, you can find the hardware address, the essid and the channel on which it's operating. Also, you can learn in what mode the access point is operating (whether master or ad hoc). Usually, you will be most interested in the essid and what encryption is being used.

Once you know what's available in your immediate environment, configure your wireless card to use one of these access points using the iwconfig utility to set the parameters for your wireless card. First, set the essid, which identifies the network access point you want:

sudo iwconfig wlan0 essid network-essid

Depending on your card and its driver, you may have the option to set the essid to the special value “any”. In this case, your card will pick the first available access point. This is called promiscuous mode.

You also may need to set the mode to be used by your wireless card. This depends on your network topology. You may have a central access point to which all of the other devices connect, or you may have an ad hoc wireless network, where all of the devices communicate as peers. You may want to have your computer act as an access point. If so, you can set the mode to master using iwconfig. Or, you simply may want to sniff what's happening around you. You can do so by setting the mode to monitor and passively monitor all packets on the frequency to which your card is set. You can set the frequency, or channel, by running:

sudo iwconfig wlan0 freq 2.422G

Or by running:

sudo iwconfig wlan0 channel 3

You can set other parameters, but you should consider doing so only if you have a really good reason. One option is the sensitivity threshold, which defines how sensitive the card is to noise and signal strength, and you can set the behavior of the retry mechanism for the wireless card. You may need to play with this in very noisy environments. Set the maximum number of retries with:

sudo iwconfig wlan0 retry 16

Or, set the maximum lifetime to keep retrying to 300 milliseconds with:

sudo iwconfig wlan0 retry lifetime 300m

In a very noisy environment, you also may need to play with packet fragmentation. If entire packets can't make it from point to point without corruption, your wireless card may have to break down packets into smaller chunks to avoid this. You can tell the card what to use as a maximum fragment size with:

sudo iwconfig wlan0 frag 512

This value can be anything less than the size of a packet. Some cards may not apply these settings changes immediately. In that case, run this command to flush all pending changes to the card and apply them:

sudo iwconfig wlan0 commit

Two other useful commands are iwspy and iwpriv. If your card supports it, you can collect wireless statistics by using:

sudo iwspy wlan0

The second command gives you access to optional parameters for your particular card. iwconfig is used for the generic options available. If you run it without any parameters (sudo iwpriv wlan0), it lists all available options for the card. If no extra options exist, you will see output like this:

wlan0      no private ioctls

To set one of these private options, run:

sudo iwpriv wlan0 private-command [private parameters]

Now that your card is configured and connected to the wireless network, you need to configure your networking options to use it. If you are using DHCP on the network, you simply can run dhclient to query the DHCP server and get your IP address and other network settings. If you want to set these options manually, use the ifconfig command (see the man page for more information).

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iPad 2 High Resolution Screen Going Equipped 'Retina Display

Second-generation tablet PC arable Apple iPad 2 has been the subject of hot debate in cyberspace. In fact, its presence was reported shortly. However, not many know the detailed specification of this 2 iPad.

Over time, some predict will be the facilities / features that would take too much sticking iPad 2. One sector of the screen (display). As quoted PULSAonline via rafeed, allegedly Apple iPad 2 will embed a high resolution screen, with a density of 2048 × 1536 pixels. With 9.7-inch diagonal screen, the screen density level about 264 dpi.

But, there are other possibilities if iPad 2 will apply the 'retinal display', which will serve the extra density that is 1536 x 800 pixels. But, the value increased to 326 dpi resolution. When properly iPad Retina Display 2 will use the meaningful resolution of the screen will be doubled from the first generation iPad, which limited to 768 × 400 pixels (132 dpi)

Just hope the news on the iPad 2 retinal display is correct, then the second generation of Apple's tablet PC is going to be a very interesting gadget. We'll wait.

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The Motherboard Parts and Functions

Motherboard determine whether or not the performance of a PC. The function of the motherboard is the place put computer components, connecting components to be run as its function and as a regulator of current flowing into each component. In one motherboard, there are some parts with their respective functions. Parts of the motherboard include:

 

1. BIOS (Basic Input / output system)
The BIOS is the motherboard serves to connect between the existing software in computers with hardware that is installed on the motherboard. The BIOS itself is an acronym for Basic Input / Output System. In the BIOS there are programs that can be used to regulate how a component mounted on the motherboard can work.

2. Socket / Slot Processor
Order processor can be placed with ease, then disediakanlah socket on the motherboard. Socket consists of holes adapted to the foot of processors that can be placed on the motherboard. There are many types of sockets on the market. For example, the socket 478, socket 775 and LGA socket for Intel processors, and also socket AM2 or AM3 socket for AMD processor output. Each socket has holes are different from one another. But there is also the motherboard that provides the processor socket holes that can be used for some type of processor. For example, the socket 478 coupled with the socket 775.
Since each processor requires a different socket shapes, important to know to buy a motherboard, socket type suitable for processors owned. Motherboards long output is not using the processor socket but still use the processor slot.

3. RAM Slots
RAM or the memory is placed on the motherboard RAM slots. RAM slots depending on the type of RAM used. For long output motherboards typically use SDRAM slot while the slot type using the latest DDR3.

4. Expansion Slot
Another part is the motherboard expansion slot. The function of the expansion slot is to put the components used to increase computer performance. Typically the device that is added is a multimedia device, such as VGA card that allows you to add sharpness of the display, sound card, and others. Expansion slots consist of various types including PCIExpress slots, PCI, or AGP. Each type of slot has advantages and disadvantages of each one depending on the needs of computer usage.

5. CMOS Battery
Existing CMOS battery on the motherboard to function as an alternative power source when the computer is not connected to the mains. The battery is very useful for the motherboard as a source of energy in identifying the components installed on the motherboard.

6. Connectors
Section motherboard that is no less important is the connector. There are various types of connector that serves to connect the motherboard to the other device. Several types of connectors include:
* Power connector serves as a liaison motherboard to the power source
* Sound connector serves to connect the motherboard to the sound device,
* USB connector allows connecting the motherboard to the USB
* SATA connector allows connecting the motherboard to the hard drive

It should be noted that the more components installed on the motherboard, the power needed to operate the computer will be even greater. Therefore, for computer and motherboard can run stable long-lasting, also provide the power supply in accordance with power demand. If the power is gained power supply less than demand, then it is likely the motherboard will be broken and the computer will run unstable.

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QEMU vs. VirtualBox

Why is it that the U.S. Government always releases a slew of RFPs just before Thanksgiving?  I’ve been swamped working on proposals since the third week of November, but we got the last one submitted just before Christmas so it’s back to normal (or what passes for normal around here) for a while.

I thought I’d take this relatively quiet period to do a quickie comparison between a couple of virtualization tools: QEMU and Oracle's VirtualBox.  For the comparison I chose to install virtual guest instances of Ubuntu 10.10 desktop from a downloaded copy of the iso.  The host system is an AMD 64-bit machine that is also running Ubuntu 10.10 desktop. Here’s the kernel version of the host at the time of this writing:  2.6.35-24-generic #42-Ubuntu SMP Thu Dec 2 02:41:37 UTC 2010 x86_64 GNU/Linux. I used VirtualBox 4.0 for this comparison.

Both products provide a graphical interface for building a new virtual guest instance.  Here are what a few of the QEMU build sequence steps look like:

This review almost did not get written, because it took friggen forever for the QEMU install to complete.  It was only out of a somewhat morbid fascination that I let it go to completion.  I started the install at about 8:15am in the morning, and by 1:00pm it was finally finished.  By comparison, the VirtualBox install took just 28 minutes start to finish, and that included download time for updates,  since I had selected the option to do that at install time.  I did not select the update option for the QEMU install because I (fortunately) forgot to select NAT networking for it prior to starting the installation.

After the QEMU install was done, the Ubuntu guest remained equivalently slow.  Boot time was about 6 minutes as compared to 23 seconds for the VirtualBox Ubuntu guest.  Once I got the logon prompt from the QEMU guest it took a very long time to achieve the final QEMU result:

 That’s right, a black screen. Which lasted so long I thought that was the final product.  About 15 minutes later, though, I got a login prompt, which promised to take forever to execute, so I finally put it out of its misery.

Oracle does not need to be too worried about competition from the QEMU camp just yet...

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