Wednesday 26 September 2012

EDUC 8848 - Module 2


Emerging Technologies Tetrad

The Holographic Versatile Disc (HVD) is a storage device based on an optical disc technology and can store several terabytes of information using collinear holography technique (Layton, n.d.). HVD enhances disk storage capability and a faster transfer rate of data. This technology obsoletes data storage devices such as CD, DVD, and Blu-ray disks with lower disk storage capability. HVD rekindles the early days of punch cards in which information were stored on perforated paper and early invention of hard disk with storage capacity of about 5MB. Then 5 million characters were huge, and people feel the invention of hard disk was the best to happen in terms of storage capacity. However, the progression of storage devices has been so rapid with the emergence of other devices such as flash drives in gigabytes. The reversal of HVD might be cloud storage, which will have unlimited storage capacity and access to information and documents can be anywhere, anytime around the world.

McLuhan’s tetrad help explore emerging technology and has four quadrants in which every invention enhances, obsoletes, rekindles and reverses simultaneously (Laureate Inc., 2009). The progression of storage devices is in a chain from floppy disk, laser disk, CD and DVD, to Blu-ray disk and HD DVD; the end is not in sight with HVD and Cloud storage.

References
Layton, J. (n.d.). How holographic versatile discs work? Retrieved September 26, 2012 from http://electronics.howstuffworks.com/hvd.htm.

Laureate Education, Inc. (Producer). (2009). McLuhan Tetrad. [Video webcast]. Retrieved from http://mym.cdn.laureate-media.com/Walden/EDUC/8848/02/downloads/WAL_EDUC8848_02_A_EN-CC.zip.

 

Monday 10 September 2012

EDUC 8848 - Emerging and Future Technologies

Identify an Emerged Technology

From thick to thin clients



The affordability of computers by many organizations was as a result of the invention of desktop computers, unlike the days of mainframes. This made many schools have technology-enabled environment. Thick clients are full-featured computers with local hard drives and capacity to run multimedia applications. They can be connected to a network and operated as standalone computers. However, maintenance and sustainability were some of the challenges encountered by the use of thick clients. Many organizations had to incur extra cost in resolving the issue of viruses on the systems. However, the emergence of thin client architecture was able to mitigate some of the challenges encountered using thick clients.

Many organizations now opt for thin client environment because of high cost of a desktop replacement, network security, data access to mobile or remote workers (Hewlett-Packard Inc, 2012). Thin clients are gaining ground at a faster speed with various manufacturers’ design process to suit the needs of users. Though, the technology has challenges of scalability and high performance servers. There might be a need to upgrade the server as the users’ workload increases or purchase a new server. The capability is limited in handling multimedia-rich applications, and the transmission of data requires a higher network bandwidth. However, the benefits outweigh the challenges. Thin clients have lower acquisition, administrative, and maintenance costs. Thin clients have better security, and do not retain data during processes, as processing is centrally managed on the server. Thin clients are highly sustainable and do not require disks, regular updating or becoming obsolete within a short period. Reduction of network congestion and support of heterogeneous PC environment are part of the benefits of thin clients (Educause, 2012).
Other technologies might help the adoption rate of thin client architecture. The use of wireless technology in a thin client environment will mitigate the issue of network bandwidth, and transmission of data will be faster. The wireless technology is becoming more popular such that students with thin client netbook can have access to school web applications anywhere, anytime. The cloud computing technology will also aid the effective use of thin client architecture, as this will reduce the workload on the server. Users can access applications stored outside the primary server.

References
Hewlett- Packard. (2012). When to consider thin client solution? Retrieved September 10, 2012 from http://www.hp.com/sbso/solutions/pc_expertise/article/thinclients_consider.html.

Educause. (2012). What are thin clients? Retrieved September 10, 2012 from http://net.educause.edu/ir/library/pdf/DEC0005.pdf