scholarly journals A Review of Polarization-Sensitive Materials for Polarization Holography

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5562
Author(s):  
Yueyang Zhai ◽  
Li Cao ◽  
Ying Liu ◽  
Xiaodi Tan
Keyword(s):  
Data Storage ◽  
High Performance ◽  
High Capacity ◽  
Polarization Holography ◽  
Optical Elements ◽  
Recording Material ◽  
Potential Applications ◽  
Capacity Data ◽  
Polarization Of Light

Polarization holography has the unique capacity to record and retrieve the amplitude, phase, and polarization of light simultaneously in a polarization-sensitive recording material and has attracted widespread attention. Polarization holography is a noteworthy technology with potential applications in the fields of high-capacity data storage, polarization-controlled optical elements, and other related fields. The choice of its high-performance materials is particularly important. To further develop polarization holography applications and improve the quality of the information recorded (i.e., material sensitivity and resolution), a deeper understanding of such materials is needed. We present an overview of the polarization-sensitive materials, which introduced polarization holographic technology and the development of polarization holographic materials. The three main types of polarization holographic materials are described, including azopolymer materials, photopolymer material, and photorefractive polymer material. We examine the key contributions of each work and present many of the suggestions that have been made to improve the different polarization-sensitive photopolymer materials.

scholarly journals Glycated Haemoglobin: An Assessment of High Capacity Liquid Chromatographic and Immunoassay Methods

1992 ◽  
Vol 29 (5) ◽  
pp. 494-505 ◽  
Author(s):  
Susan J Standing ◽  
Richard P Taylor
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Throughput ◽  
High Performance ◽  
High Capacity ◽  
Glycated Haemoglobin ◽  
Coefficients Of Variation ◽  
Operation Flexibility ◽  
Liquid Chromatographic

We have assessed five high-throughput systems for the measurement of glycated haemoglobin and have reviewed published evaluations of individual analysers. All systems offered better precision than a widely used electroendosmosis method. The low pressure chromatography and immunoassay systems demonstrated greater between-batch imprecision than the high performance liquid chromatography analysers, the latter achieving the proposed analytical goal of between-batch coefficients of variation less than 5%. Agreement between all systems measuring HbA1 was good but there was variability amongst observed HbA1c values. The systems were also assessed for their quality of chromatographic separation, simplicity of operation, flexibility, cost and potential for interference by other haemoglobins.

The Hardware and Software Design of Dual Pick-up Head Three-Dimensional Optical Storage System

2011 ◽  
Vol 332-334 ◽  
pp. 727-730
Author(s):  
Jian Wen Cai
Keyword(s):  
Data Storage ◽  
Storage System ◽  
Three Dimensional ◽  
High Capacity ◽  
Computer Software ◽  
Experimental System ◽  
Optical Storage ◽  
Optical Data Storage ◽  
Optical Data ◽  
Capacity Data

Femtosecond laser two-photon three-dimensional optical data storage is an effective method for high capacity data storage. In this paper, system construction is analyzed in detail from hardware and software aspects for dual pick-up head three-dimensional optical storage systems. Three-dimensional optical storage system is conposed of the fluorescence reader module and the servo control module, firstly analyzes the read and write process of three-dimensional optical storage by 89c52 MCU controling from the hardware. Then, the software is analyzed in detail, the software consists of two parts: the lower computer software and PC software. lower computer software achieves communication and control related to hardware, PC software is used to facilitate the control of the experimental system. Two CPU control software is introduced, and controlling process of PC software control is analyzed in detail. These work has laid a solid foundation for the practical of three-dimensional optical storage technology.

scholarly journals Facile synthesis of sulfur@titanium carbide Mxene as high performance cathode for lithium-sulfur batteries

Nanophotonics ◽  
2020 ◽  
Vol 9 (7) ◽  
pp. 2025-2032
Author(s):  
Fan Zhang ◽  
Yunlei Zhou ◽  
Yi Zhang ◽  
Dongchan Li ◽  
Zhichao Huang
Keyword(s):  
Titanium Carbide ◽  
High Performance ◽  
High Capacity ◽  
Shuttle Effect ◽  
Lithium Polysulfide ◽  
Lithium Sulfur Batteries ◽  
Potential Applications ◽  
Sulfur Hosts ◽  
Lithium Sulfur ◽  
Sulfur Nanoparticles

AbstractThe design of sulfur hosts with polar, sulfurphilic, and conductive network is critical to lithium-sulfur (Li-S) batteries whose potential applications are greatly limited by the lithium polysulfide shuttle effect. Mxenes, possessing layered-stacked structures and high electrical conductivities, have a great potential in sulfur hosts. Herein, sulfur nanoparticles uniformly decorated on titanium carbide Mxene (S@Ti3C2Tx Mxene) are synthesized via a hydrothermal method and then utilized as a cathode for lithium-sulfur batteries. This unique architecture could accommodate sulfur nanoparticles expansion during cycling, suppress the shuttling of lithium polysulfide, and enhance electronical conductivity. Consequently, the S@Mxene with a high areal sulfur loading (∼4.0 mg cm−2) exhibits a high capacity (1477.2 mAh g−1) and a low capacity loss per cycle of 0.18% after 100 cycles at 0.2 C. This work may shed lights on the development of high performance sulfur-based cathode materials for Li-S batteries.

scholarly journals Zero Spatial Frequency Limit: Method to Characterize Photopolymers as Optical Recording Material

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Sergi Gallego ◽  
Andrés Márquez ◽  
Manuel Ortuño ◽  
Cristian Neipp ◽  
Inmaculada Pascual ◽  
...  
Keyword(s):  
Spatial Frequency ◽  
Data Storage ◽  
Direct Method ◽  
Optical Recording ◽  
Optical Processing ◽  
Optical Elements ◽  
Recording Material ◽  
The University ◽  
A Direct Method ◽  
Processing Group

Photopolymers are useful for different holographic applications such as holographic data storage or diffractive optical elements. However, due to the presence of two different phenomena, polymer formation and monomer diffusion, it is difficult to characterize each parameter independently. We propose a direct method based on zero spatial frequency recording, to eliminate the diffusion influence, and on interferometric techniques, both in transmission and in reflection, to obtain quantitative values of shrinkage, polymerization rate, polymer refractive index and relation between intensity and polymerization, and so forth, This method has been implemented in the Holography and Optical Processing Group from the University of Alicante to characterize different photopolymers. In this paper, we present a compilation of the results obtained with this method for different photopolymers and we compare their characteristics.

Metadata Management in PetaShare Distributed Storage Network

2012 ◽  
pp. 118-139
Author(s):  
Ismail Akturk ◽  
Xinqi Wang ◽  
Tevfik Kosar
Keyword(s):  
Data Storage ◽  
High Performance ◽  
Distributed Storage ◽  
Storage System ◽  
High Capacity ◽  
Distributed Data ◽  
Data Handling ◽  
Distributed Data Storage ◽  
Efficient Data ◽  
High Level

The unbounded increase in the size of data generated by scientific applications necessitates collaboration and sharing among the nation’s education and research institutions. Simply purchasing high-capacity, high-performance storage systems and adding them to the existing infrastructure of the collaborating institutions does not solve the underlying and highly challenging data handling problem. Scientists are compelled to spend a great deal of time and energy on solving basic data-handling issues, such as the physical location of data, how to access it, and/or how to move it to visualization and/or compute resources for further analysis. This chapter presents the design and implementation of a reliable and efficient distributed data storage system, PetaShare, which spans multiple institutions across the state of Louisiana. At the back-end, PetaShare provides a unified name space and efficient data movement across geographically distributed storage sites. At the front-end, it provides light-weight clients the enable easy, transparent, and scalable access. In PetaShare, the authors have designed and implemented an asynchronously replicated multi-master metadata system for enhanced reliability and availability. The authors also present a high level cross-domain metadata schema to provide a structured systematic view of multiple science domains supported by PetaShare.

scholarly journals Removal of Diuron and Hexazinone from Public Water Supply Using a Filter System

2018 ◽  
Vol 36 ◽  
Author(s):  
R.P. CALEGARI ◽  
K.F. MENDES ◽  
B.C. MARTINS ◽  
R.F. PIMPINATO ◽  
A.S. BAPTISTA ◽  
...  
Keyword(s):  
High Performance ◽  
High Capacity ◽  
Maintenance Cost ◽  
Human Consumption ◽  
Water Turbidity ◽  
Treatment Techniques ◽  
Filtration System ◽  
Activated Carbon Filter ◽  
Adequate Quality

ABSTRACT: The intensive use of pesticides, such as the herbicides diuron and hexazinone, leads to a concern about the preservation of the water quality of the water resources destined for human consumption. Currently, conventional water treatment techniques do not have high capacity to remove herbicides; therefore, the need to study other techniques arises. The present study aimed to evaluate the efficiency of the removal of diuron and hexazinone herbicides present in water through a commercial filtration system. The study was carried out in a filtration system composed of the following sequence of filters: sand filter and coconut shell activated granular carbon, polypropylene filter 20 mm, activated carbon filter with silver salts, polypropylene filter 5 mm and reverse osmosis. The affluent contained an initial concentration of 12.06 mg mL-1 of hexazinone and 37.70 mg mL-1 of diuron. The samples were collected in all filters and subjected to the analysis of turbidity and presence of herbicides by high performance liquid chromatography. The filter set removed 99.31; 99.84 and 99.99% of water turbidity, hexazinone and diuron respectively at the end of the system. After the filtration process, the treated water presented adequate quality for public supply and human consumption. The technique employed in this study is easy to operate and has a low acquisition and maintenance cost.

scholarly journals Improved Encrypted-Signals-Based Reversible Data Hiding Using Code Division Multiplexing and Value Expansion

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Xianyi Chen ◽  
Haidong Zhong ◽  
Lizhi Xiong ◽  
Zhihua Xia
Keyword(s):  
Data Hiding ◽  
Reversible Data Hiding ◽  
High Capacity ◽  
Signal Energy ◽  
Spreading Sequence ◽  
Capacity Data ◽  
Embedding Rate ◽  
Better Than ◽  
Code Division Multiplexing

Compared to the encrypted-image-based reversible data hiding (EIRDH) method, the encrypted-signals-based reversible data hiding (ESRDH) technique is a novel way to achieve a greater embedding rate and better quality of the decrypted signals. Motivated by ESRDH using signal energy transfer, we propose an improved ESRDH method using code division multiplexing and value expansion. At the beginning, each pixel of the original image is divided into several parts containing a little signal and multiple equal signals. Next, all signals are encrypted by Paillier encryption. And then a large number of secret bits are embedded into the encrypted signals using code division multiplexing and value expansion. Since the sum of elements in any spreading sequence is equal to 0, lossless quality of directly decrypted signals can be achieved using code division multiplexing on the encrypted equal signals. Although the visual quality is reduced, high-capacity data hiding can be accomplished by conducting value expansion on the encrypted little signal. The experimental results show that our method is better than other methods in terms of the embedding rate and average PSNR.

scholarly journals High-Capacity Data Hiding for ABTC-EQ Based Compressed Image

Electronics ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 644 ◽  
Author(s):  
Cheonshik Kim ◽  
Ching-Nung Yang ◽  
Lu Leng
Keyword(s):  
Data Hiding ◽  
High Capacity ◽  
Block Size ◽  
Adjustment Process ◽  
Embedding Capacity ◽  
High Quality Image ◽  
Quality Image ◽  
Capacity Data ◽  
Complex Block

We present a new data hiding method based on Adaptive BTC Edge Quantization (ABTC-EQ) using an optimal pixel adjustment process (OPAP) to optimize two quantization levels. The reason we choose ABTC-EQ as a cover media is that it is superior to AMBTC in maintaining a high-quality image after encoding is executed. ABTC-EQ is represented by a form of t r i o ( Q 1 , Q 2 , [ Q 3 ] , BM) where Q is quantization levels ( Q 1 ≤ Q 2 ≤ Q 3 ) , and BM is a bitmap). The number of quantization levels are two or three, depending on whether the cover image has an edge or not. Before embedding secret bits in every block, we categorize every block into smooth block or complex block by a threshold. In case a block size is 4x4, the sixteen secret bits are replaced by a bitmap of the smooth block for embedding a message directly. On the other hand, OPAP method conceals 1 bit into LSB and 2LSB respectively, and maintains the quality of an image as a way of minimizing the errors which occur in the embedding procedure. The sufficient experimental results demonsrate that the performance of our proposed scheme is satisfactory in terms of the embedding capacity and quality of an image.

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