Modeling and performance of MEMS-based storage devices

2000 ◽  
Author(s):  
John Linwood Griffin ◽  
Steven W. Schlosser ◽  
Gregory R. Ganger ◽  
David F. Nagle
Keyword(s):  
Storage Devices ◽  
And Performance

Text Encryption based on Huffman Coding and ElGamal Cryptosystem

2020 ◽  
Vol 14 ◽  
Author(s):  
Khoirom Motilal Singh ◽  
Laiphrakpam Dolendro Singh ◽  
Themrichon Tuithung
Keyword(s):  
Data Transfer ◽  
Huffman Coding ◽  
Large Integer ◽  
Text Data ◽  
Storage Devices ◽  
Scientific World ◽  
Elgamal Cryptosystem ◽  
Encryption Schemes ◽  
Transfer Operation ◽  
And Performance

Background: Data which are in the form of text, audio, image and video are used everywhere in our modern scientific world. These data are stored in physical storage, cloud storage and other storage devices. Some of it are very sensitive and requires efficient security while storing as well as in transmitting from the sender to the receiver. Objective: With the increase in data transfer operation, enough space is also required to store these data. Many researchers have been working to develop different encryption schemes, yet there exist many limitations in their works. There is always a need for encryption schemes with smaller cipher data, faster execution time and low computation cost. Methods: A text encryption based on Huffman coding and ElGamal cryptosystem is proposed. Initially, the text data is converted to its corresponding binary bits using Huffman coding. Next, the binary bits are grouped and again converted into large integer values which will be used as the input for the ElGamal cryptosystem. Results: Encryption and Decryption are successfully performed where the data size is reduced using Huffman coding and advance security with the smaller key size is provided by the ElGamal cryptosystem. Conclusion: Simulation results and performance analysis specifies that our encryption algorithm is better than the existing algorithms under consideration.

scholarly journals Features of Organization and Application of Active Balancing Cells with Extended Triggering Range of Shunt Circuits Keys in Ionistor Modules and Storage Devices of Joint-Stock Company “Elecond”

2021 ◽  
Vol 24 (3) ◽  
pp. 68-77
Author(s):  
T.G. Chikurov ◽  
M.V. Kibardin ◽  
S.L. Shirokih
Keyword(s):  
Storage Device ◽  
Joint Stock Company ◽  
Stock Company ◽  
Voltage Level ◽  
Storage Devices ◽  
Active Balancing ◽  
And Performance ◽  
Comparison Circuit ◽  
And Storage ◽  
Shunt Circuit

The solution of the problem of the deficit of voltage level for the complete unlocking of MOSFETs used as keys in the shunt circuits of the cells of the active balancing of ionistor storage devices is given. In particular, a revision of the widespread two-pole circuit of the active balancing cell of the ionistor consisting of a comparison circuit and a shunt circuit with a key on the MOSFET is presented. The relevance of the problem is confirmed by the results of the analysis of the characteristics of the key MOSFETs at the level of the unlocking voltage of 2.5...2.7 V from the output of the comparison circuit. It is shown that this voltage is not sufficient to provide the channel resistance corresponding to a fully open transistor and the flow of the specified shunt currents in the entire range of external influencing factors (VVF), especially when exposed to a reduced temperature from plus 15 to minus 60 °C. The solution presented in the paper for finalizing the circuit of the active balancing cell is that voltage boost circuits are introduced between the comparison node and the shunt circuit. Their use allows you to increase the voltage at the gate of the key MOSFET by two, three, four, etc. times, which ensures the reliable operation of the shunt circuit key for different shunt currents. A special feature of the developed cell circuits is the three-pole switching, in which an additional output is connected to the adjacent ionistor cell. This method of switching on the developed active balancing cells provides doubling of the unlocking voltage on the gate and is sufficient for reliable unlocking of the key on the MOSFET at all shunt currents at the level of the charging voltage of the ionistors in the storage device 2.5...2.7 V. For shunt currents of the order of tens of amperes, it is shown that it is necessary to switch to a quasi-four-pole switching of the developed active balancing cell due to the separation of the supply power circuits (measuring circuits) of the comparison circuit and the power buses of the level-up circuit with the shunt circuit. The methods of switching on the developed cells that allow multiplying the unlocking voltage at the gate of the key MOSFET by three, four or more times are shown. The schemes and criteria for the necessity of applying such inclusion are given. Practical testing of the developed three-pole and quasi-four-pole active balancing cells, carried out on the ionistor NEE of JSC “Elecond”, showed satisfactory stability and performance under the influence of the entire set of VVF.

Dimensionality, Function and Performance of Carbon Materials in Energy Storage Devices

2021 ◽  
pp. 2100775
Author(s):  
Jing Xiao ◽  
Junwei Han ◽  
Chen Zhang ◽  
Guowei Ling ◽  
Feiyu Kang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Carbon Materials ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
And Performance

scholarly journals An Empirical Evaluation of NVM-Aware File Systems on Intel Optane DC Persistent Memory Modules

Electronics ◽  
2021 ◽  
Vol 10 (16) ◽  
pp. 1977
Author(s):  
Guangyu Zhu ◽  
Jaehyun Han ◽  
Sangjin Lee ◽  
Yongseok Son
Keyword(s):  
Data Management ◽  
Empirical Evaluation ◽  
File Systems ◽  
Data Management System ◽  
Nand Flash ◽  
Storage Devices ◽  
Persistent Memory ◽  
Memory Modules ◽  
And Performance ◽  
And Storage

The emergence of non-volatile memories (NVM) brings new opportunities and challenges to data management system design. As an important part of the data management systems, several new file systems are developed to take advantage of the characteristics of NVM. However, these NVM-aware file systems are usually designed and evaluated based on simulations or emulations. In order to explore the performance and characteristics of these file systems on real hardware, in this article, we provide an empirical evaluation of NVM-aware file systems on the first commercially available byte-addressable NVM (i.e., the Intel Optane DC Persistent Memory Module (DCPMM)). First, to compare the performance difference between traditional file systems and NVM-aware file systems, we evaluate the performance of Ext4, XFS, F2FS, Ext4-DAX, XFS-DAX, and NOVA file systems on DCPMMs. To compare DCPMMs with other secondary storage devices, we also conduct the same evaluations on Optane SSDs and NAND-flash SSDs. Second, we observe how remote NUMA node access and device mapper striping affect the performance of DCPMMs. Finally, we evaluate the performance of the database (i.e., MySQL) on DCPMMs with Ext4 and Ext4-DAX file systems. We summarize several observations from the evaluation results and performance analysis. We anticipate that these observations will provide implications for various memory and storage systems.

scholarly journals Lyra2: Password Hashing Scheme with improved security against time-memory trade-offs

2017 ◽  
Author(s):  
Ewerton R. Andrade ◽  
Marcos A. Simplicio Junior
Keyword(s):  
Research Effort ◽  
Security Level ◽  
Brute Force ◽  
Storage Devices ◽  
Computational Costs ◽  
Cryptographic Algorithm ◽  
Trade Offs ◽  
And Performance ◽  
Password Based Authentication ◽  
Dedicated Hardware

To protect against brute force attacks, modern password-based authentication systems usually employ mechanisms known as Password Hashing Schemes (PHS). Basically, a PHS is a cryptographic algorithm that generates a sequence of pseudorandom bits from a user-defined password, allowing the user to configure the computational costs involved in the process aiming to raise the costs of attackers testing multiple passwords trying to guess the correct one. In this context, the goal of this research effort is to propose a novel and superior PHS alternative. Specifically, the objective is to improve the Lyra algorithm, a PHS built upon cryptographic sponges whose project counted with the authors' participation. The resulting solution, called Lyra2, preserves the efficiency and flexibility of Lyra, and it brings important improvements when compared to its predecessor: (1) it allows a higher security level against attack venues involving time-memory trade-offs; (2) it includes tweaks for increasing the costs involved in the construction of dedicated hardware to attack; (3) it balances resistance against side-channel threats and attacks relying on cheaper (and, hence, slower) storage devices. Besides describing the algorithm's design rationale in detail, the thesis also includes a detailed analysis of its security and performance.

Babel

2016 ◽  
Vol 13 (4) ◽  
pp. 36-53 ◽  
Author(s):  
Moisés Quezada-Naquid ◽  
Ricardo Marcelín-Jiménez ◽  
José Luis González-Compeán
Keyword(s):  
Load Balance ◽  
Storage System ◽  
Trade Off ◽  
Data Redundancy ◽  
Storage Devices ◽  
Commodity Hardware ◽  
Allocation Procedure ◽  
Different Types ◽  
And Performance ◽  
Hardware Platforms

The Babel File System is a dependable, scalable and flexible storage system. Among its main features the authors underline the availability of different types of data redundancy, a careful decoupling between data and metadata, a middleware that enforces metadata consistency, and its own load-balance and allocation procedure which adapts to the number and capacities of the supporting storage devices. It can be deployed over different hardware platforms, including commodity hardware. The authors' proposal has been designed to allow developers to settle a trade-off between price and performance, depending on their particular applications.

scholarly journals Development of Bioelectronic Devices Using Bionanohybrid Materials for Biocomputation System

Micromachines ◽  
2019 ◽  
Vol 10 (5) ◽  
pp. 347 ◽  
Author(s):  
Jinho Yoon ◽  
Taek Lee ◽  
Jeong-Woo Choi
Keyword(s):  
Gold Nanoparticles ◽  
Processing System ◽  
Inorganic Materials ◽  
Information Storage ◽  
Storage Devices ◽  
Dna And Rna ◽  
Potential Applications ◽  
System Cell ◽  
And Performance ◽  
Silicon Based

Bioelectronic devices have been researched widely because of their potential applications, such as information storage devices, biosensors, diagnosis systems, organism-mimicking processing system cell chips, and neural-mimicking systems. Introducing biomolecules including proteins, DNA, and RNA on silicon-based substrates has shown the powerful potential for granting various functional properties to chips, including specific functional electronic properties. Until now, to extend and improve their properties and performance, organic and inorganic materials such as graphene and gold nanoparticles have been combined with biomolecules. In particular, bionanohybrid materials that are composed of biomolecules and other materials have been researched because they can perform core roles of information storage and signal processing in bioelectronic devices using the unique properties derived from biomolecules. This review discusses bioelectronic devices related to computation systems such as biomemory, biologic gates, and bioprocessors based on bionanohybrid materials with a selective overview of recent research. This review contains a new direction for the development of bioelectronic devices to develop biocomputation systems using biomolecules in the future.

scholarly journals Battery Characterization and Dimensioning Approaches for Micro-Grid Systems

Energies ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1305 ◽  
Author(s):  
Sofia Boulmrharj ◽  
Youssef NaitMalek ◽  
Abdellatif Elmouatamid ◽  
Mohamed Bakhouya ◽  
Radouane Ouladsine ◽  
...  
Keyword(s):  
Energy Management ◽  
Energy Production ◽  
Production Systems ◽  
Renewable Energy Sources ◽  
Optimum Size ◽  
Grid Systems ◽  
Storage Devices ◽  
Micro Grid ◽  
And Performance ◽  
And Storage

Micro-Grid (MG) systems have been extensively studied and deployed to lower the power consumption while reducing the greenhouse gas emissions. Although, the challenge with Renewable Energy Sources (RES) is their uncertain and intermittent nature, things that led the researchers to think about integrating storage devices, especially batteries, into MG systems. The main aim is to store the excess of produced energy for further usage when not enough energy is available. Nevertheless, batteries modeling and characterization is mandatory to identify their parameters and study their performance within MG systems. Moreover, in order to continuously supply electricity to the building, it is required to figure out the optimum size of energy production systems and storage devices. This paper introduces a methodology for MG modeling and performance evaluation. Its main contribution is twofold, i) battery’s parameters identification, and ii) modeling and dimensioning method for both standalone and MG systems. An instrumentation platform, composed of recent sensing and actuating equipment, for MG energy management and battery characterization is developed. Simulation and experimental results show the effectiveness of the proposed methodology.

scholarly journals Toward Flexible and Wearable Embroidered Supercapacitors from Cobalt Phosphides-Decorated Conductive Fibers

2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Jianfeng Wen ◽  
Bingang Xu ◽  
Jinyun Zhou
Keyword(s):  
High Performance ◽  
Current Collector ◽  
High Energy ◽  
High Energy Density ◽  
Material Structure ◽  
The Novel ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Conductive Fibers ◽  
And Performance

Abstract Wearable supercapacitors (SCs) are gaining prominence as portable energy storage devices. To develop high-performance wearable SCs, the significant relationship among material, structure, and performance inspired us with a delicate design of the highly wearable embroidered supercapacitors made from the conductive fibers composited. By rendering the conductive interdigitally patterned embroidery as both the current collector and skeleton for the SCs, the novel pseudocapacitive material cobalt phosphides were then successfully electrodeposited, forming the first flexible and wearable in-plane embroidery SCs. The electrochemical measurements manifested that the highest specific capacitance was nearly 156.6 mF cm−2 (65.72 F g−1) at the current density of 0.6 mA cm−2 (0.25 A g−1), with a high energy density of 0.013 mWh cm−2 (5.55 Wh kg−1) at a power density of 0.24 mW cm−2 (100 W kg−1). As a demonstration, a monogrammed pattern was ingeniously designed and embroidered on the laboratory gown as the wearable in-plane SCs, which showed both decent electrochemical performance and excellent flexibility.

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