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What is a t1 connection?
Answer This is 1mb broadband through ADSL
What trends will be seen in the future of computers?
There are a number of different technologies currently in research for computers. The most significant of these is the quantum computer. If this technology becomes a useable reality, then it will make todays super computers look like tinker toys.
What are the importance of data storage of a computer?
In a sense it is not. However, before long-term storage was invented for computers, systems which contained data would lose that data if the system was ever turned off. It could also be lost in a power flicker, brownout, power spike, or in the event of errors or data corruption, which happened frequently. Long-term storage was needed to store data when the system was turned off. And for computers not in constant use, this could also allow the system to be purposely turned off, and save (a lot of) power. The first media used for computer storage were Punchcards and Punchtape. These were cards or reels of paper with holes punched in them. A light shines through the holes and is read back by a simple optical reader to identify individual bits. Most punchards held only up to 500 bits (about 58 useable bytes), while punchtape could be much longer. Computers could easily be programmed to create their own punchcards and punctape, provided they were inserted JUST right. This didn't exist at first but once it did, it allowed you to program or type up data, then have it spit out in an immediately useable manner. Before this, you can to punch the data yourself- A very difficult and complex process. Later, the advent of other media, especially magnetic storage, improved the process. Using Drum Memory, computers finally had access to enormous amounts of storage at much higher speeds than punch drives. These drums could hold several kilobytes or more, and operated on large rotating cylinders read back with a servo. It also allowed the computer to use the drum drive for temporary (memory) storage, in the event it ran out, vastly increasing it's calculatory capabilities. Later, magnetic tape was invented. It was not random-access like drum drives, but was far more compact and efficient, held much more data, and was cheap and affordable to manufacture. Tape Drives are still in use today for massive-scale backups, ranging from several hundreds megabyte nanocasettes to enormous 45 TB tapes. While it was slower than drum drives, it was vastly superior to tape drives and held many hundreds to thousands of times more data. For a time, before the floppy disk, it was the storage media of choice. Many people remember the Commodore 64, a tape-drive powered personal computer console gaming system. Later, the advent of harddrives, which used spinning platters instead of drums, allowed the computer long-term storage internally. It was much faster than tape drives, although it's capacity was more limited. It also allowed non-sequential access, so it could go to and load a file specifically. THe floppy drive also provided a better method of data storage for external use. Since Hard Drives were fragile and internally mounted, they could not easily be transported, and were expensive. So floppy drives used a thin 'floppy' plastic disc that held a magnetic powder inside. Like a cross between a harddrive and a tape drive, it was inexpensive, relatively reliable, and fast enough (though harddrives were much faster) to outperform tape drives. Floppy drives became standardized first with 5.25" disks, which added a large, soft plastic cover. Then the 3.5" floppy diskette which had a hard plastic case, no longer 'floppy' at all except the film inside, a moveable metal plate to protect the film from dust, debris, and scratches. And an optical sensor 'read only' tab that provided (poor) protection against piracy, and prevented accidental overwrite of a floppy. Eventually harddrives became the dominant platform for internal storage, but many years later the floppy was finally replaced by the CD. Using optical (visual) storage methods instead of magnetic, it could hold a lot of data in a small area, read sequentially, and was generally faster than a floppy. While floppies evolved into faster and much larger Zip Drives, the rewriteable CD (or CD-R, or CD Burner) was vastly superior due to being a bit faster, a lot cheaper, and more reliable and universal. Everyone had a CD-ROM drive already, but not many had Zip Drives. CD Burners could produce CDs that work on normal CD-ROM drives. Thus is became the superior media. CDs evolved into DVDs, which evolved into Blu-Ray and HD-DVDs (now defunct) Other storage media soon was invented. The advent of SD cards, NAND drives, thumb drives, magneto-optical disks, SRAM sticks, Flash drives, Solid State Drives, and more all contributed to storage. Each with their own advantages and disadvantages. I won't ellaborate on these unless you ask. So, as you can see, for MODERN computing, without storage, you could simply not function. You would have to spend many hours or even days typing in code to you computer, just to build an Operating System, and getting it to boot. All that, just to BOOT! But with storage, you can just re-load the pre-existing data off your storage device automatically. And voila! Instant working computer.
List and define the five major SDLC phases?
For developing systems/software that involves 10 Phases:1. Initiation2. System Concept Development3. Planning4. Requirements Analysis5. Design6. Development7. Integration and Testing8. Implementation9. Operations and Maintenance10. Disposition.The PhasesInitiation - Initiation is where there is an identified need for a new system. For instance, a retailer of fine crystal glass is in need of a new system to handle inventory. They've decided that the old System of putting the inventory into a simple spreadsheet will no longer work. They want a system where they can track inventory, inventory cost, facilities cost, personnel, a customer database, can track trends in buying, identify inventory that is not moving well and price it to move, etc. In other words, they want to be able to know everything with a few clicks of the keyboard. A Project Management is placed in charge and he/she will develop a Concept Proposal - which is a document identifying the problem and why the new system needs to be pursued. The document is presented to upper management who approves it and the project moves on to the next phase.System Concept Development - This is where the first real look at what will be necessary takes place. Several reports can be created here.- Feasibility Study (will it work?)- Cost/Benefit Analysis (is the cost really worth it?)- System Boundary (how far should the project go?)- Risk Management (what will happen if we don't do it?)These reports are then presented, again, to the powers that be and a decision is made whether or not to go ahead. They approve the funding. If they give their approval it's on to the next phase.Planning Phase - Who is doing what, when, and how? What personnel are needed? Use existing personnel or hire consultants? New Hardware? Develop own software or buy it off the shelf? What are the Deliverables - such as completed software programming and documentation, user manual, training, testing plans, etc? A Planning document is submitted for approval.Requirements Analysis - Documentation of requirements. What interfaces are required (will it run with Windows NT and Windows XP?). What is the functionality required - should it be run with the mouse or keyboard commands? What is the level of proficiency required by the user? Will a new room be needed for the servers or equipment? Requirements documentation is approved, then it's on to the Design phase.Design Phase - Take those Requirements and develop detailed, workable specifications. This is where everything is put together and the actual design of the system is done. This is also where documentation such as the Maintenance Manual, Operations Manual, and Training Manual begin. This is also where some of the flaws in the original planning may appear and require some adjustment. Again, there is documentation and approval.Development Phase - The system is built. The software, hardware, and testing occur during the Development Stage. This is also the phase where the bugs are worked out of the system. A contingency plan is also developed at this point. A contingency plan is an emergency management document. If the power goes out - what happens to the system? What is the back up? How fast can it be brought back up to speed? Again, documentation and approval (get used to this).Integration and Testing Phase - This is the formal integration and testing of the system. Testing has been done on the development phase, but in the Integration and Testing Phase it is a formal, documented testing procedure, not only to assure that the system performs as designed, but testing the roll-out of the system. If there is already another system in place with data, how fast can that data be migrated into the new system and useable to the company? Usually, the system is rolled-out over a weekend so that if anything goes wrong, the old system is still active and available. Integration and Testing is vital to the decision to go "live" with the new system. If it fails testing, it cannot betrusted to work. Approval of testing and test results is necessary before the project moves into implementation.Implementation Phase - Everything is ready and it's time to go live. Training takes place, everyone who will use the system must be fully informed of the day it goes live, previous data is migrated, and the system is ready for use. After it goes live, the system is reviewed post-implementation to see how well it worked and how well did the project go. It's often known as a debriefing or lessons learned meeting. It is also where any problems that were not crucial to the implementation can be addressed and any necessary changes to the system documented for future versions.Operations and Maintenance Phase - Hey, it's not over. Just like a car engine, maintenance and support are necessary. What happens if the system is based on Microsoft NT 4.0 and 2 years later Microsoft is no longer supporting NT 4.0? Or, a new e-mail program is put in place and it interferes with the system? Fixes are necessary and will occur. This is the day-to-day operation of the software. No one can just walk away once the software is rolled-out and say, "Whew, glad that's over." It's not over; it's just begun.Disposition Phase - This is where the system has become obsolete. Perhaps a whole new system is coming in, or this system cannot keep up. Many programs and systems became obsolete with the Y2K problem or with upgrades of operating systems. Whatever the reason, putting the system to bed involves more than just shutting off the server. Often, the system may be kept going due to regulatory issues or because there are still projects using it. Even if the system will be shut down due to the development of a better system, disposition needs planning. A disposition plan, archiving of system documentation, archiving of data, even a plan for getting rid of the old equipment may be a part of the Disposition Phase.This is a short description of SDLC and its phases. The important idea to take away from SDLC is that it involves planning, approval, testing, and documentation to assure that the system can, and will work as required.Read more: What_are_the_phases_of_SDLC
What emerging technologies will make nuclear energy safer or more useable or more efficient or cleaner etc?
Some emerging technologies that could enhance nuclear energy include advanced reactor designs like small modular reactors, integrated safety systems, accident-tolerant fuels, and advanced materials for enhanced plant durability. Additionally, digitalization and artificial intelligence can improve operational efficiency and safety through predictive maintenance and real-time monitoring. Advanced nuclear fuel reprocessing techniques can also help in reducing waste and maximizing fuel utilization.
How is technology harmful to the environment?
Some technologies, such as changing sewage in to useable gas, produces CO2 as part of the process.
Where a local variable can be used?
In the block that contains its definition./* i isn't useable here */{ int i; /* i is useable here */ }/* i isn't useable here */
What percent of fresh water is useable?
1 percent of fresh water is useable
What are principles of store?
Where possible, use single-storey buildings they provide more useable space, use an efficient storage plan that is place the goods in such a way that the store can be used optimally.
What are the principles of store layout?
Where possible, use single-storey buildings they provide more useable space, use an efficient storage plan that is place the goods in such a way that the store can be used optimally.
What are Principles of stores layout?
Where possible, use single-storey buildings they provide more useable space, use an efficient storage plan that is place the goods in such a way that the store can be used optimally.
Is the pokesav useable on an emulator?
no its not
What are words that have use in them?
Useable
Is the Macbook A1278 still useable in 2014?
The MacBook A1278 is still useable in 2014 and can be purchases online on Amazon.com.
Which is correct useable or usable?
useable and usable are both accepted, yet the proper spelling is usable. (According to most dictionaries.) I even spelled check it and useable is red so usable would be correct.
Which is the preferred spelling useable or usable?
Webster's 17th Edition shows usable first and useable second. So, either is okay.
