Due to recent advances in hardware and communication technology, the paradigm of computing has been shifted from fixed to mobile. But the mobile devices possess limited datastorage capacity besides inadequate battery...
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ISBN:
(纸本)9781479940400
Due to recent advances in hardware and communication technology, the paradigm of computing has been shifted from fixed to mobile. But the mobile devices possess limited datastorage capacity besides inadequate battery power. We can augment mobile device with cloud services but which in turn imposes serious security based implication. One of the major challenges is to check the integrity of outsourced data besides providing privacy and secrecy. To tackle the aforementioned issues we can augment secure datastorage operations to provide remote integrity check. It needs to calculate the hash of data just once and does not need to posses outsourced data by the mobile user. So the complete framework provides encryption, outsourced decryption and data integrity as whole thus consuming a very little battery power.
In order to study the new holographic recording medium, four kinds of photopolymer materials containing TMPTA monomers are studied. The three-dimensional interference fringe information was successfully recorded in th...
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ISBN:
(数字)9781510644915
ISBN:
(纸本)9781510644915;9781510644908
In order to study the new holographic recording medium, four kinds of photopolymer materials containing TMPTA monomers are studied. The three-dimensional interference fringe information was successfully recorded in the photopolymer film samples, which proved that it has good holographic recording and high resolution ability. The experimental results show that when the recording angle is 30 degrees, the diffraction efficiency is as high as 93.5%@532nm and the refractive index modulation is as high as 3.07x10(-3). As a holographic recording medium, it has high resolution ability and high diffraction efficiency, the material is possible suitable for permanent storage of holograms and big data, besides it has strong advantages and potential applications in the large-scale 3D display, big datastorage, holographic anti-counterfeiting, holographic printing and other fields.
Heat-assisted magnetic recording (HAMR) technology needs a light delivery system with an incorporated near-field transducer (NFT) as a minute heat generator. A novel system for light delivery with a triangular spot si...
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Heat-assisted magnetic recording (HAMR) technology needs a light delivery system with an incorporated near-field transducer (NFT) as a minute heat generator. A novel system for light delivery with a triangular spot size converter (SSC) and an optical fiber is proposed. The advantages of using a triangular SSC are optical efficiency and integration tolerance between the optical fiber and the NFT. It also has good affinity to conventional head fabrication process. The optical fiber enables flexible laser location. It was confirmed that fabricated triangular SSC can propagate light and reduce beam spot. Computer simulations and experiments demonstrated possibility of integration of light delivery system between NFT, SSC, and optical fiber. Flyability of a pico slider with an optical fiber was also demonstrated. It shows that the optical fiber does not have a big impact on flyability below 10 nm flying height and off-track vibration.
Insatiable demand for datastorage resulted from applications such as big data, social media, virtual reality and internet of things (IOT) requires new storage technologies with simultaneously high capacity as well as...
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ISBN:
(纸本)9781728116327;9780960038008
Insatiable demand for datastorage resulted from applications such as big data, social media, virtual reality and internet of things (IOT) requires new storage technologies with simultaneously high capacity as well as high access speed. A varieties of nanotechnologies have been investigated for ultrahigh capacity opticalstorage applications, such as nanogratings, plasmonics, spintronics and nanomagnons. Almost all nano-phenomona sare simultaneously ultrafast processes, and femtosecond lasers play a crucial role in investigating these nano-prcoesses.
A sub-diffraction writing technique assisted by up-conversion nanoparticles is devised for fabricating nanoscale features with low power consumption. This new method is of significant potential in low-power ultra-high...
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An overview is given of optical memory technology, covering the advantages of opticalstorage and technology trends. The markets and applications of opticalstorage systems are discussed. It is concluded that the futu...
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ISBN:
(纸本)0818608285
An overview is given of optical memory technology, covering the advantages of opticalstorage and technology trends. The markets and applications of opticalstorage systems are discussed. It is concluded that the future of opticalstorage is bright, but some complex system integration issues must still be resolved.
Due to the booming growth of Information and Communication technology (ICT), a vast amount of data is produced at a considerably high rate and it drives the traditional methods of storing data to its limits and most o...
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Storing and managing the large scale moving objects data is one of the research hotspots and difficulties in data mining, trajectory analyzing, location-based services and many other applications. To solve these probl...
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ISBN:
(纸本)9783319387895;9783319387871
Storing and managing the large scale moving objects data is one of the research hotspots and difficulties in data mining, trajectory analyzing, location-based services and many other applications. To solve these problems, firstly we design the trajectory point representing model, the trajectory representing model, the moving object datastorage model and their relationships based on object-oriented ideology;then we construct a moving objects database using in PostGIS according to the presented models;finally we test the effectiveness of the moving object database with real data. The experimental results show that using the method presented in this paper to store large scale moving objects data can reduce the storage space obviously, meanwhile, it can increase the spatial and temporal querying efficiency effectively.
Nowadays companies are increasingly adopting the technology of cloud computing. This technology is subject to a lot of research and continuous advances are made. The use of cloud computing in the companies advantages ...
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ISBN:
(数字)9783319571416
ISBN:
(纸本)9783319571416
Nowadays companies are increasingly adopting the technology of cloud computing. This technology is subject to a lot of research and continuous advances are made. The use of cloud computing in the companies advantages such as: reducing costs, sharing and exchange of information between institutions, but the data in the Cloud computing are susceptible to be compromised and the companies are exposing to see their data loss. In this study, we address the subject of security in cloud computing;we expose and discuss some researches that had been proposed to secure the data stored in the cloud. And then we will present our new frameworks that ensure confidentiality of datastorage in the cloud environment.
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