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Friday 6 January 2012

History of Technology

Introduction History of Technology


In ancient times, technology was defined by Homer and Hesiod as the spoken word of manual craft or cunning skill (Luna, 1994).  By 330 BC, Aristotle coined the Greek term technologia and split scientific knowledge into three parts: theoretical science, practical science, and productive science (technology).
According to Luna (1994), the earliest use of the word technology in the United States was found an a Harvard University course on the "application of the Sciences to the Useful Arts" in 1816.  The 1832 Encyclopedia Americana defined technology as principles, processes, and nomenclatures. Ever since that time, there has been debate as to the definition and identity of technology.  
From a historical perspective, philosophers of technology agree that two phases of technology can be seen: the craft phase and the modern scientized phase.  However, to a philosopher of technology, modern technology, although scientized, is a unique structure of thinking, not merely applied science. Nor, is technology, like science, fully described by the laws of nature.  
Iron workers. Henry Met de Bles (Also known as: Il Civetta), Flemish, C.1480/1510-1550/55, Copyright Kathleen Cohen, tec01080

Wolf (1935) argued "that modern science was derived from technology through the wisdom accumulated via the 'technical arts,' and through the invention of a few critical instruments (e.g., the telescope, the microscope, the barometer, the air-pump, the pendulum clock.)" (Lewis & Gagel, 1992).  In these terms, technology is defined as practical science--science as technique. 
According to Bertrand Russell (1972, p. 492), practical science is not the same as "applied science." According to Russell, "applied science," as viewed by scientists, is inferior to "pure" or "theoretical science." Practical science or technology, as Russell viewed it, was not inferior science but was a conception of science as technique.
"Practical science...has been important from the first, and has continually increased in importance, until it has almost ousted theoretical science from men's thoughts...The triumph of science has been mainly due to its practical utility, and there has been an attempt to divorce this aspect from that of theory, thus making science more a technique, and less and less a doctrine as to the nature of the world....science as technique was building up in practical men a quite different outlook from any that was to be found among theoretical philosophers.  Technique confers a sense of power: man is much less at the mercy of his environment than he was in former times."
The history of technology is long and complex.  In fact, as discussed in unit 1, there is a fundamental disagreement about what is technology.  Was the discovery of fire the first technology?  Or, was the wheel or the plow the first technology?  In contrast to other units, in this unit we will focus on specific examples in the history of technology.
Of course, inter-dispersed with the examples, there will be a discussion of the historical significance of these technologies in the time they were invented. Also, we will discuss the effect of these technologies on subsequent developments in history, technology, and science.  As discussed in unit 1, The Nature of Science and Technology, modern science developed almost solely out of Western Europe.  Technology, however, has a more eclectic past.  
It is this eclectic past that we will explore in this unit. Our travels through technology will not be comprehensive; instead, we will focus on three specific topics: Technology in the Middle Ages, Chinese Contributions to Technology, and Islam Spain and the History of Technology. These topics were chosen to build upon our discussion of the nature of technology in Unit 1 and to provide a context for our future discussion of technology beginning at the Industrial Revolution in Unit 3 (Technology and Work). It is hoped that when you move to Unit 3 you will better understand the complex nature of technological development and diffusion.

Standard Technology - USB 3.0

History of USB:
USB (Universal Serial Bus) technology was originally introduced in 1996. Over the years, USB has become the most popular standard for connecting external peripherals to PCs and Macs. The popularity of USB stems from a combination of factors including, but not limited to:
  • Widespread availability
  • Plug-and-Play usability
  • Device powering - USB supplies power to the peripheral device allowing devices like portable hard drives and mice to be used without an additional power source.
  • Adequate performance
As technology devices and peripherals became faster, the need to increase the transfer speed of USB arose. In 2001, the USB 2.0 standard was ratified, increasing the transfer speed of full-speed USB by 40 times. USB 2.0 was commonly named hi-speed USB.
Today, USB 2.0 is still limited to transfer speeds that are significantly less than that of hard drives, optical drives, and hard-wired network protocols.
In 2009, the USB 3.0 standard was ratified, increasing the transfer speed of hi-speed USB 2.0 by an additional 10 times, or 400 times faster than the original USB 1.1 full-speed specification. USB 3.0 is currently called SuperSpeed USB.
USB 3.0 provides all of the traditional benefits of USB with an interface capable of delivering maximum performance with peripherals.
Compatibility with earlier USB standards:
The USB standards have always aimed to provide backward compatibility with prior USB standards. USB 3.0 is no different, though it uses different connectors and cables than earlier USB versions. Despite the changes, USB 3.0 connectors and cables remain completely compatible with USB 2.0. In most cases, USB 3.0 devices will be compatible with USB 1.0 and 1.1 devices, however it is not a requirement for USB 3.0 certification.
A USB 3.0 device purchased today is compatible with existing USB 2.0 compatible devices and provides a good technology investment for the future, as USB 3.0 becomes the dominant USB technology.
How USB 3.0 compares with other standards:
USB 3.0 is one of the fastest and most cost-effective interfaces for connecting peripherals. At 4,800 Mbps (4.8 Gbps), USB 3.0 is significantly faster than USB 2.0, FireWire 400, and FireWire 800 as well as the common SATA 1.5 and 3.0 standards.
Here is a comparison chart that shows popular interface speeds today:
Before USB 3.0, eSATA (external SATA) was the only interface capable of delivering internal HDD speeds via an external connection. However, eSATA is incapable of providing power to an external hard drive, as USB can. Additionally, eSATA is a hard drive interface technology that cannot be used for non-storage peripheral connections and it does not offer plug-and-play.
USB 3.0 connectors and cables are easily identifiable by the use of blue color in their connectors. Both the host and device connectors have blue colored internal components, as shown in the picture below:
How can I add USB 3.0 support to my PC?
USB 3.0 is a very new technology and almost all PCs purchased before 2010 will not have USB 3.0 ports. Adapter cards are available to provide USB 3.0 support for existing PCs.
Notebook PCs:
The Buffalo Technology USB 3.0 PC ExpressCard Notebook Adapter ICF-EC2U3/UC can be used with any notebook PC that has an ExpressCard 34 or ExpressCard 54 slot running Windows® XP, Windows Vista®, or Windows® 7.
Desktop PCs:
  • The Buffalo Technology USB 3.0 PCI Express Desktop Adapter IFC-PCIE2U3 can be added to a desktop PC to provide SuperSpeed USB 3.0. The PC must have at least one PCI Express x 1 Rev 2.0 slot available and must run Windows® XP, Windows Vista®, or Windows® 7.
  • Buffalo Technology has tested its USB 3.0 storage devices with Gigabyte motherboards. Gigabyte is a leading manufacturer of PC motherboards, now offering many with built-in USB 3.0 support. If building a new PC or replacing a motherboard, look for a USB 3.0 compliant motherboard.

USB technology



A guide to understanding USB technology
Universal Serial Bus devices have been around since 1995. In computer years that seems like a lifetime. In that lifetime we’ve seen two distinct generations of USB technology – USB 1.0 and USB 2.0, and now we're entering the era of USB 3.0.  This article describes the history of USB, technical differences between the various iterations and the future of USB technology. It will also help you update an old computer for USB 2.0 support.
What is USB?
USB stands for Universal Serial Bus. USB interfaces peripheral devices, like a printer, with a host computer. USB features a standardized plug for attaching various devices. The plug and play nature of USB allows devices to be attached to a computer or notebook without restarting the operating system. USB has a sister technology found with many cell phones and digital cameras called Micro-USB. USB technology allows for lower power consumption and higher data transfer rates between devices.
How to identify which USB technology your computer uses
When you plug in a compatible USB 2.0 device into a USB 1.x port your computer will inform you that the device could perform faster if you had a USB 2.0 port. This doesn’t mean the device won’t work, but due to the technology differences between USB 2.0 and USB 1.x, the bandwidth between the devices would be less than adequate.
You can also figure out if your computer has USB 2.0 by opening the Device Manager from the Control Panel, click on the Universal Serial Bus Controllers, and look for the word "enhanced" to describe the controllers installed on your system. Not all of the controllers will say this but you should see at least one that says something like “Standard Enhanced PCI to USB Host Controller”. The language may vary but if you have the word “enhanced” in there somewhere then you have USB 2.0 ports on your computer. It is entirely possible for you to have USB 2.0 ports in the rear of the computer, but only USB 1.x ports in the front (or vice-versa).
Technical differences between USB technologies
The biggest difference between USB technologies exist in the data transfer rates. The earliest USB 1.x technology had a low speed of 1.5Mb per second and a high speed of 12Mb per second. This was indeed an improvement on previous technologies for data transfer, and allowed devices like external optical drives and external hard drives to perform much faster.
USB 2.0 technology was unveiled in 2000 and then made standard by the USB-IF in 2001. This version upped the speed considerably to 480Mb per second of high speed data transfer. Around the same time USB 2.0 came onto the market, they also brought out the Mini B plug and receptacle – a connector commonly found in MP3 players and other small electronic devices. USB 2.0 has stood the test of time, gaining improvements throughout the years, but staying relatively the same.
There is a technology which co-exists with USB 2.0, the certified wireless USB technology or WUSB. Imagine connecting your printer, scanner, keyboard, mouse, (etc) without any kind of cables between the devices! WUSB is an extension of the Universal Bus Protocol And it’s just a shame that consumers don’t see it implemented more often.
As computer hard drives grow in size, processor speeds quicken, and users move to more robust media like audio and video clips, so too does the data transfer technology need to advance and improve. For this reason, USB 3.0 has been in the works for some time. It is expected to hit the shelves in late 2009 – although an exact date is not known just yet. USB 3.0 will be ten times faster than the current USB 2.0 iteration. This new version will be moving data at a rate of 4.8 Gb per second– in other words, lightning fast.
Each new USB version that comes out still works with the same connectors as the previous ones. The backwards compatibility of USB 2.0 devices with a USB 1.0 port will remain true for USB 3.0. Many USB 3.0 devices and hardware are available, although a lot of motherboards and systems are still sold with USB 2.0 at this time.