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E-Articles - What Is Optical Disk?
OPTICAL DISK
Optical disk is an electronic data storage medium from which data is read and written to by using a low-powered laser beam. It is flat, circular, plastic or glass disk on which data is stored in the form of light and dark pits. The laser beam reads the pits and the data can be accessed. There are three basic types of optical disks:
Read-only optical disks:
Optical disk is an electronic data storage medium from which data is read and written to by using a low-powered laser beam. It is flat, circular, plastic or glass disk on which data is stored in the form of light and dark pits. The laser beam reads the pits and the data can be accessed. There are three basic types of optical disks:
Read-only optical disks:
According to USFDA, a combination product is one composed of any combination of a drug and device; biological product and device; drug and biological product
b> The optical disks, which are recorded at the time of manufacture and cannot be erased. CD, CD-ROM, DVD-ROM, and DVD-Video are the read-only disks.
WORM: WORM stands for write-once, read many. The optical disks that can be recorded by the user only once but cannot be erased. After they have been recorded once, they behave like a read-only optical disk CD-R, DVD-R, and WORM dis
WORM: WORM stands for write-once, read many. The optical disks that can be recorded by the user only once but cannot be erased. After they have been recorded once, they behave like a read-only optical disk CD-R, DVD-R, and WORM dis
; or drug, device, and biological product and fixed dose combination would include two or more combinations of drug.
Examples of combination products may in
Examples of combination products may in
s are write-once.
Rewritable/Magneto-optic disks: The optical disks that can be erased and written to with the new information. CR-RW, DVD-RAM, DVD-RW, and magneto-optic disks and Data play are rewritable. Rewritable disks use magneto-optic or phase change technology.
An optical disk offers many advantages over magnetic storage media.
Highest storage capacity
Low cost
Rewritable/Magneto-optic disks: The optical disks that can be erased and written to with the new information. CR-RW, DVD-RAM, DVD-RW, and magneto-optic disks and Data play are rewritable. Rewritable disks use magneto-optic or phase change technology.
An optical disk offers many advantages over magnetic storage media.
Highest storage capacity
Low cost
lude drug-coated devices, drugs packaged with delivery devices in medical kits, and drugs and devices packaged separately but intended to be used together.
per Megabyte of storage
Environmental condition tolerance
High data stability
Long media life
An optical disk has much more storage capacity on the order of gigabytes, than a magnetic disk. It can hold up to 6GB of data in comparison to 1.44 MB of a diskette. Optical disks are inexpensive to manufacture. Data stored on optical disks is resistant to power surges or m
Environmental condition tolerance
High data stability
Long media life
An optical disk has much more storage capacity on the order of gigabytes, than a magnetic disk. It can hold up to 6GB of data in comparison to 1.44 MB of a diskette. Optical disks are inexpensive to manufacture. Data stored on optical disks is resistant to power surges or m
here is enormous increase in the number of combination products entering the market in the recent years. Combination products have proven advantages but fixe
gnetic disturbances, such as head crashes or corruption form stray magnetic fields. Hence, they provide high data stability. Optical disks are less vulnerable to extremes of hot and cold as
compared to the magnetic disks. Optical disks have long media life than magnetic disks.
OPTICAL STORAGE DEVICES
CD-ROM
CD-ROM: is an abbreviation of Compact Disc Read-Only Memo
OPTICAL STORAGE DEVICES
CD-ROM
CD-ROM: is an abbreviation of Compact Disc Read-Only Memo
d dose combinations are still in the process of convincing regulatory authority on their advantages over the single ingredient formulations.
Combination pro
Combination pro
ry. A CD-ROM is a CD that contains computer data, which cannot be read or rewritten. In
computers, CDROM is the most commonly used optical storage technology. CD-ROM is a compact disc that contains information, which is accessible by a computer. It is composed of polycarbonate plastic, thin reflective metal layers, made of aluminium and a lacquer coating. Data is stored on the disc as a
ucts have become life saving products for the pharmaceutical companies who doesnt have many innovative molecules in their product pipeline and have been inc
eries of light and dark pits; the light portion refers to the spaces between the pits. A laser beam reads the pits and the data can be accessed.
CD-ROM is an adaptation/EXTENSION of the compact disc that is designed for music storage and playback. The format of CD-ROM is very similar to an audio CD; the only difference being the standards used to store data. A standard 120 mm CD-ROM hold
CD-ROM is an adaptation/EXTENSION of the compact disc that is designed for music storage and playback. The format of CD-ROM is very similar to an audio CD; the only difference being the standards used to store data. A standard 120 mm CD-ROM hold
easingly used in the product life cycle management. Even the companies having product patents are trying to extend their product life cycle through the combi
s up to 700 MB of data, or about 70 minutes of audio. This may mean that One CD can contain over one thousand novels; an average novel being composed of 60, 000 words. Once the data is written to a standard CD-ROM disc, it cannot be altered or rewritten.
A CD-ROM can be read using a CD-ROM drive, which is almost common on the personal computers. A CD-ROM drive may be connected to the com
A CD-ROM can be read using a CD-ROM drive, which is almost common on the personal computers. A CD-ROM drive may be connected to the com
nation products and maximize the revenues. But the companies involved in this practice are overlooking that they are burdening the patients both economically
uter in several different ways depending on the type of interface, such as:
IDE (ATA)
SCSI
SATA
Firewire
USB
Almost all modern CD-ROM drives can play audio as well as video CDs.
CD-ROM STANDARDS
CD-ROM format provides an outstanding solution to the problem of storing large digital files. Several formats are used for data stored on CD-ROMs. These in
IDE (ATA)
SCSI
SATA
Firewire
USB
Almost all modern CD-ROM drives can play audio as well as video CDs.
CD-ROM STANDARDS
CD-ROM format provides an outstanding solution to the problem of storing large digital files. Several formats are used for data stored on CD-ROMs. These in
and physically. They need to rightly judge the benefits of the combination products and they have to even look at the risks involved when combining the produ
clude Red book standards for audio-CD, White Book and Yellow Book for CD-ROM. An ISO 9960, which defines the standard file system of a CD-ROM is due to be replaced by ISO 13490.
CD-ROM FORMAT
One CD-ROM sector contains 2352 bytes, which is further divided into 98 24-byte frames. A CD-ROM contains a third layer of Reed-Solomon error correction in order to achieve improved error co
CD-ROM FORMAT
One CD-ROM sector contains 2352 bytes, which is further divided into 98 24-byte frames. A CD-ROM contains a third layer of Reed-Solomon error correction in order to achieve improved error co
ts. Some of the combination products were well accepted by physicians while others suffered. Companies involved in development of combination products are fi
rection and detection.
Mode-1 CD-ROM: It has full three layers of error correction data, which contains 2048 bytes of the available 2352 per sector. Mode-2 CD-ROM: It is mostly used for video files, which contains 2336 user-available bytes per sector.
CD-ROM SPEEDS AND USES
+ Early CD-ROM drives were known as single-speed and could read the data at the speed of 150 KBps.
+ CD-
Mode-1 CD-ROM: It has full three layers of error correction data, which contains 2048 bytes of the available 2352 per sector. Mode-2 CD-ROM: It is mostly used for video files, which contains 2336 user-available bytes per sector.
CD-ROM SPEEDS AND USES
+ Early CD-ROM drives were known as single-speed and could read the data at the speed of 150 KBps.
+ CD-
ding difficulty in defining their combination products and facing various challenges from selecting a combination to marketing it.
Following aspects would a
Following aspects would a
ROM drives can transfer data up to the speed of 7800 KBps
+ CD-ROM can store audio, video, text and program instructions. It is used to store software programs.
DVD-ROM
DVD-ROM: is an abbreviation of Digital Versatile Disc- read only memory. DVD-ROM is an optical disc storage media format that can be used for data storage, which includes movies with high video and sound q
+ CD-ROM can store audio, video, text and program instructions. It is used to store software programs.
DVD-ROM
DVD-ROM: is an abbreviation of Digital Versatile Disc- read only memory. DVD-ROM is an optical disc storage media format that can be used for data storage, which includes movies with high video and sound q
dd to the challenges in developing combination products:
Which markets to tap where the combination products can do fairly well?
Which combination prod
Which markets to tap where the combination products can do fairly well?
Which combination prod
ality. DVD-ROM is a non-volatile optical storage medium similar to CD-ROM, which contains computer data that cannot be erased or rewritten. These DVDs are read-only disks that have storage capacity for 133 minutes of high quality video, in format, and audio full- length feature film. The discs are pressed in a similar fashion as the CDs. The reflective surface is gold or silver colored.
cts are meaningful and rational?
Which therapeutic categories to select?
Which Combinations can address unmet needs of the patients?
Do combin
Which therapeutic categories to select?
Which Combinations can address unmet needs of the patients?
Do combin
DVD-ROM can be accessed using a DVD-ROM drive attached to the personal computer. DVD-ROM drives are backward compatible, i.e. they are also capable of reading CD-ROMs and audio CDs as well. The DVD-ROM supports disks with capacities of 4.7 GB to 17 GB and access rates of 600 KBps to 1.3 MBps. A standard DVD disc store up to 9.4 GB of data. DVD-ROMs are of same size as a compact disc, but
tions increase the patient compliance?
What would be the developing cost?
How to tackle the risks encountered during combination product developmen
What would be the developing cost?
How to tackle the risks encountered during combination product developmen
olds data about 7 times more. DVD can store that much of data because both the sides of a disc are used, with sophisticated data compression technologies.
DVD-ROM is a variation of CD-ROM that is being used in place of CD-ROMs in many personal computers. All DVD-ROMs contain a file system, UDF, which is an extension of the ISO 9660 Standard used for data CDs.
CD-RW
CD-RW is an a
DVD-ROM is a variation of CD-ROM that is being used in place of CD-ROMs in many personal computers. All DVD-ROMs contain a file system, UDF, which is an extension of the ISO 9660 Standard used for data CDs.
CD-RW
CD-RW is an a
t?
As combination products don't fit into the traditional categories of drugs, medical devices, or biological products, the USFDA is in the process of devel
As combination products don't fit into the traditional categories of drugs, medical devices, or biological products, the USFDA is in the process of devel
bbreviation of compact disc-rewritable. It is a recordable CD format that can be erased and rerecorded multiple times, just like a floppy disk or a hard disk. It is a rewritable version of CD-ROM. CD-RW disc is round plastic, about 5 inches in diameter. CD-RW disks can be played or recorded in the CD-RW drive only. These disks behave unusable when put in a regular CD-drive or a CD-R drive
ping new procedures for reviewing their safety, efficacy and quality.
Professional from academic institutions, pharmaceutical industries, health care indust
Professional from academic institutions, pharmaceutical industries, health care indust
cannot be played. A CD-RW drive can read everything except a DVD.
A CD-RW can hold 650 Megabytes of data (unlimited number of times) written by a CD-RW drive. CD-RW cannot be selectively overwritten but can be extended. CD-RWs must be closed before they can be read in a normal CD-ROM drive. CD-RW disks cannot be read using a CD-ROM drive built before 1997. CD-RWs can be randomly read and
A CD-RW can hold 650 Megabytes of data (unlimited number of times) written by a CD-RW drive. CD-RW cannot be selectively overwritten but can be extended. CD-RWs must be closed before they can be read in a normal CD-ROM drive. CD-RW disks cannot be read using a CD-ROM drive built before 1997. CD-RWs can be randomly read and
y and representatives from various regulatory agencies are working out to design the regulatory requirements for manufacture and sale of combination products
written because of the variation of UDF format. CD-RW disks and drives are more expensive than a regular CD-ROM drive or media. A CD-RW disc can be read optically by laser light.
DVD-RW
DVD-RW: stands for Digital Versatile Disk-Rewritable. It is a re-recordable optical disc, which can record up to 4.7 GB per side in a similar fashion to a CD-RW. DVD-RW supports sequential read/w
DVD-RW
DVD-RW: stands for Digital Versatile Disk-Rewritable. It is a re-recordable optical disc, which can record up to 4.7 GB per side in a similar fashion to a CD-RW. DVD-RW supports sequential read/w
.
As there is an increasing trend of the combination products companies manufacturing such products should be able to tackle the problems involved in the de
As there is an increasing trend of the combination products companies manufacturing such products should be able to tackle the problems involved in the de
ite access i.e. the device may need to wait for the correct location in a constantly revolving medium. The information stored on DVD-RW can be erased and rerecorded over multiple times without damaging the medium.
DVD-RW is a phase-change erasable format based on DVD-R, using similar mark length, track pitch and rotation control. The format is supported by the DVD Forum. DVD-RW is also c
DVD-RW is a phase-change erasable format based on DVD-R, using similar mark length, track pitch and rotation control. The format is supported by the DVD Forum. DVD-RW is also c
elopment. They need to be wiser in analyzing the market trends and the regulatory requirements.
Companies that provide selfless information through particip
Companies that provide selfless information through particip
alled DVD Dash RW" and "DVD Minus RW.
DVD-RW can be played in many DVD drives and players. Depending on quality, recording time varies from 1 hour to 6 hours.
If these optical disk gets damaged then the stored data becomes in accessible, these lost or damaged data can be recovered by usinig Stellar Phoenix CD Data Recovery Software
DVD-RW can be played in many DVD drives and players. Depending on quality, recording time varies from 1 hour to 6 hours.
If these optical disk gets damaged then the stored data becomes in accessible, these lost or damaged data can be recovered by usinig Stellar Phoenix CD Data Recovery Software
tion in industry events and feedback to regulatory authorities would be able to face the challenges and will be successful in developing combination products
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