Computer Hardware

the 14mp camera has 1.4 times better quality than the 10mp one

Shut down the laptop. Turn over the laptop and you will find a small panel with a Hard drive sign with 2 screws on the panel cover. Unscrew the cover carefully and pull out the HD very carefully. It's very simple.

access time

computer need a good cold area for for it to function at is best

If your laptop has a power button which can be accessed without opening the lid, just press the button. However most laptops these days have the power button under the lid (to keep you from accidentally turning it on in the bag) in which case, youll just have to open the lid.

i think you mean "can you put pictures ON a cd-r" and the answer is yes, of course just not a lot. get a USB DRIVE a 5 dollar one holds more pictures, and is re-writable, and soooo easy to use, you dont have to worry about burning.

I recently purchased a Toshiba external hard drive to move some stuff from my daughters tiny 20G HD on her Inspirion 2650. This is a USB 2 device, and I assumed the USB ports on the computer were also. I guess not. I got a message from XP saying the ports couldn't provide enough power to the device. I saw the drive had a socket for a DC power supply, so I plugged in the appropriate voltage wall wart. I immediately smelled burning circuitry, so I unplugged it. The USB ports smell like a burned electrical device and they no longer work when I plug in the USB mouse or a memory stick. I'm going to have to pull the MB and see if I can find a fuse to replace. Anyone done this?

You have burned the USB ports, and i doubt theres a fuse for this.you plugged the AC adapter in so it was getting its full voltage from that plus the extra voltage from your USB and you have fried the circuitry.

Ethernet switches, both unmanaged and managed, avoid collisions by routing the messages in an Ethernet network to only the intended devices. When a switch receives an Ethernet message (packet), it reads the address of the device for which the message is intended, and then transmits the message out of only the port to which that device is connected (even if it is connected through several other switches).

When the switch gets the first bit of information from the first device, such as your computer, it reads the MAC address of that device. The MAC address is the media access control number. This number is an ID number that is assigned to most network adapters and is preset by the manufacturer. Once this number is read, it is recorded in memory by the switch. Next, the switch attempts to look for any other devices on the network by sending out packet requests of information. Once another device gets this packet, it sends out a signal to the switch to acknowledge the request. Now the MAC address of this device is recorded. Each time these packets are sent, the information is "time stamped." The switch then works to filter this information that is communicated among all of the devices. The switch has enough memory to retain this information.

Industrial applications of Ethernet (called industrial Ethernet) require special Ethernet switches that have industrial ratings for noise immunity, shock, vibration and temperature in a wide range of form factors with multiple options for copper and fiber connectivity. See link below for examples of industrial Ethernet Switches from Phoenix Contact.

3M ESPE company - manufacturer of dental products - uses RFID technology in their mixing machine Pentamix 3. It helps to recognize high quality 3M ESPE impression materials and allow to mix them in double speed than competetive impression materials, which quality is lower or not clinically proven. The reason of RFID sensors used is to ensure safe and comfortable use of the machine.

Another name for a Graphics card is:

Video Card

Expansion Card

or

Video Acceleration Card

A speed camera is not classified as an input device; rather, it is considered an automated enforcement tool used by law enforcement to monitor and record the speed of vehicles. Input devices typically refer to hardware that allows users to provide data or control signals to a computer, such as keyboards or mice. Speed cameras capture data (the speed of vehicles) but do not serve the primary function of inputting data for user interaction.

A com port can also be called a serial port.

The front side bus formerly connected the Northbridge Controller to the CPU (a way of communication) it still has the same communication, but it is not called FSB, it is called a HyperTransport Bus.

RAID 1 is mirroring without parity or striping. It requires a minimum number of two drives and has a fault tolerance of one.

RAID 1 works by writing data to both drives, thereby producing a mirrored set. When the read is requested, it is serviced by the drive that has the lowest seek time plus rotational latency.

An example of this set-up is two 1TB drives in RAID 1 that have a combined total of 2TB of storage, but because they are in RAID 1, the effective storage space is 1TB as data is mirrored on both drives. It is effectively a real-time back-up system. If one drive fails, data is not lost.

Another term for a computer program is software.

The benefits to this are the same as you are using right now reading this page. A time-sharing system (what we call a server nowadays) provides many many people the opportunity to use the system. Technically, even a standard PC is a time-sharing system, because you can run many different programs on it at a time (think Browser, iTunes, Anti-Virus, etc.).

The old mainframe systems had a card reader and an output. Only one set of cards could be run through at a time. So, if payroll was running through all 14000 employee's paycheck calculations, you had to wait until they were done. Modern mainframe systems have some time-sharing capabilities by allowing multiple processes to run on the system, but those processes are virtualized, rather than a true sharing system. However, the details of that can be left to others.

There are benefits and downsides to every type of system. In a mainframe-style system, all resources are available to the process being run, which benefits large data crunching operations (like payroll). The downside to a mainframe-style system is that only one process can run at a time in each virtual machine.

In a server-style system, all resources are shared among all processes. If a process "runs away" by using more processes than it should, then the other processes suffer, which the end-user sees as a server responding very slowly and/or "timing out". The upside to a server-style system is that you can serve web pages to thousands of people, while at the same time handling thousands of pieces of email.

The bandwidth of the transmission media

The modulation encoding used

Any portable data storage needs

USB stands for Universal Serial Bus and is a standard means for connecting devices such as flash memory, printers, cameras etc. to a computer.

Compaq was acquired by Hewlett Packard. Before the acquisition the ticker symbol was CPQ. The ticker symbol for Hewlett Packard is HPQ.

Finger print scanner, eye scanner (for high security area) ect.

Let A,B,C are inputs and Y is the output.

A B C Y

0 0 0 0

0 0 1 1

0 1 0 1

0 1 1 1

1 0 0 1

1 0 1 1

1 1 0 1

1 1 1 1

Mind it that Y=A+B+C is a logical operation in our case i.e. OR operation. It's not an arithmetic operation (i.e. not a sum operation).

A touchscreen is hardware.

A telegraph key.

In my younger days,we had row houses.They were all in a row and all looked the same. as in mill hill houses.The mills would build houses and rent them to the mill workers.There is an old saying "I owe my soul to the company store" this also came from the mill hill villages where the mills owned the houses,stores,everything!!

ADDED: As a Transatlantic difference, if these what I think they are - all joined into a long, single building - in the UK they are called "terraced" houses. Although an 18C concept they did become particularly associated with 19C industrial (not just mill) towns, but a lot of modern housing developments now are of terraced form.

The "company store" ethos was used in Britain too, but its inherent unfairness led to its legal abolishment under a 19C law I think called the "Truck Acts".