Cloud Computing


The system that performs the delivery of computing as a service over the network is the Cloud Computing. It is the service that provides shared resources and software information to the computers. In Cloud computing, computation, software, data access etc are provided to the end users. The end user can access the informations in the network without needing to understand the system’s components and infrastructure. The term cloud is used to represent the Internet system similar to the cloud drawing used in earlier telephone system to give point-to-point data circuits for the Virtual private network.

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Cloud Computing


The system that performs the delivery of computing as a service over the network is the Cloud Computing. It is the service that provides shared resources and software information to the computers. In Cloud computing, computation, software, data access etc are provided to the end users. The end user can access the informations in the network without needing to understand the system’s components and infrastructure. The term cloud is used to represent the Internet system similar to the cloud drawing used in earlier telephone system to give point-to-point data circuits for the Virtual private network.

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BIOCOMPUTING


Bio computing is the construction and use of computers that functions like living things or having biological components such as DNA. Bio computing is also used in bioinformatics to assist the biological research. Bio computing uses Bio computers which uses biologically derived molecules such as Proteins and DNA. These are used for computational calculations including data storage, data retrieve, data processing etc.


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DNA Chip. How Stuff Works


Electronics is emerging as a new branch called Bionics in combination with biology since there are possibilities to explore the ideas from living organisms. Micro organisms are now considering as the major source for developing DNA chips, Molecular switch etc. This new field is the Synthetic biology.

The DNA chips opened a new era in medical research and medical diagnostics. The DNA chip can provide large quantity of genomic data of microorganisms in a few hours, so that identification of the microbe is very easy. A DNA chip is a” Micro array” of genes attached at fixed locations on a solid support like glass slide or silicon membrane.
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DNA Hard Disk. How Stuff Works



Not possible to see now because it is not available in shops. It is a future reality that may emerge as DNA based microprocessor. DNA based computing is an emerging technology using the biomolecule DNA as the data storage molecule. It is possible since DNA is doing data storage in the form of genetic information. If DNA computers emerge, it can store billions of times more data than the present computer. The DNA molecule of genes has the potential to perform calculations many times faster than the present microprocessors. By using the Nanotechnology, it is possible to create Nano computers to replace the Silicon based computers.

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How Electronic Tag Works? Tech Focus 2


Electronic tags are now widely used  for identification and tracking objects. Tags also find uses in commercial products to mark their identity . The object tagged with the Electronic tag can be easily identified or located. The common type of tag used is the Radio Frequency Tag or RF TagRadio Frequency Identification ( RFID) is the technology used to transfer data from an Electronic Tag using radio frequency waves. The Tag called RFID Tag or RFID label is attached to an object and the data is collected in a RFID Reader to track the object. The signals from the Tag can be collected by the reader even if the Tag is located far away from the line-o-sight of the tag. The RFID tracking is a form of automatic identification technology using a unique serial number in the tag. RFID is widely used in biometric identification systems, domestic utilities, commercial items, security services etc for easy identification. Unlike Bar coding system, RFID does not require direct contact with the object and even it can identify the tagged objects placed in the body.


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Can a Bacterium works as Electronic switch? Fact File 43


Yes it is possible. The Halobacterium salinarium can be used as a Bioswitch.The bacterial protein Bacteriorhodopsin from Halobacterium salinarium has created great interest among scientists to produce bio-logic gates functioning similar to semiconductor logic gates. It is a bacterial species living in the salt marshy lakes of California. These bacteria can survive at very high temperature of 150 degree Fahrenheit or more and in high salt concentration around six times higher than the sea water. These bacteria have a light sensitive protein called Bacteriorhodopsin (bR) in their cell membrane. This protein exhibits unusual properties of structural changes when exposed to different wavelengths of light. This property of the Bacteriorhodopsin is exploited to create molecular switches.

The Molecular switches increase the possibility of fast random access and transportability of datas in Multimedia systems. If these are used in computers, appreciable amount of size reduction, fast memory access, mass storage of datas etc can be achieved. The ability of Biomolecule to work as switching devices in computers is a major area of research in the present day with the invention of some bacterial proteins which functions exactly similar to the electronic switches.

Bacteriorhodopsin is the light sensitive, heat stable protein present in Halobacterium salinarium. The bR absorbs different wavelengths of light and changes its structure into different forms. For example when it absorbs Red light, its structure changes into one form and retains the structure. When it absorbs Green light, another structure is formed. Thus by exposing to Red and Green lights, it is possible to change the structure of bR exactly similar to the semiconductor logic gates giving high and low outputs in varying voltages.

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