DATA STORAGE FOR PARALLEL COMPUTING IN INDIVIDUAL SOFTWARE ENVIRONMENTS WHEN SOLVING MATERIALS SCIENCE PROBLEMS

The paper discusses methods of data storage when performing parallel computations in a multicomputer high-performance computing complex in virtual software environments. Approaches to building a data storage system using software systems designed to solve problems of materials science are proposed.

A Novel Trade Transaction Agreement Algorithm Using Blockchain Consensus Mechanism

Blockchain, the underlying technology of Bitcoin, has been deeply studied in various fields after its development in recent years. As a typical decentralized distributed data storage system, consensus reached among all participants in a blockchain system requires a consensus mechanism to be realized. In order to make blockchain applicable to different application scenarios, different consensus mechanisms have been proposed. With the further development of blockchain applications, more and more studies have been conducted on the consensus mechanism. However, some existing consensus mechanisms still have some problems in various aspects. Therefore, this paper proposes a trade deal algorithm based on the blockchain mechanism of consensus. First of all, according to PBFT, the lack of a dynamic problem in the VPBFT voting mechanism was introduced. The node system is divided into four types with different responsibilities and gives the number of relations between nodes. When the number of nodes is changed, it can be calculated according to the quantity relation, ensuring dynamic. Second, a data anonymous transaction and authentication protocol is designed. In the protocol, when the seller sells data, the mapping relationship between the real identity and the false identity of the data owner is blinded and sent to the buyer. When the buyer wants to verify their identity, the seller’s identity can only be verified with the authentication of the blockchain. The proposed algorithm is superior to the current consensus in terms of time and energy consumption, throughput, and fault tolerance methods, which is proven through experimental tests and simulation analysis.

SISTEM REPOSITORY PERPUSTAKAAN PADA UNIVERSITAS BANTEN JAYA BERBASIS WEB (STUDI KASUS : UNIVERSITAS BANTEN JAYA)

The library repository system located at Banten Jaya University is not currently utilizing information technology to the maximum. This is seen from the library member registration information system and the ongoing report data storage system, the system is still manually done by filling out the form on paper and also still the manual storage of scientific work report data, if it has finished filling out the form the library must re-input on the application. In this way it is certainly less effective and efficient. Based on the results of the system research that the authors conducted, with the update of the repository system this web-based library can provide ease to the officer in managing the library information system. The research method used is waterfall development model, which consists of analysis, design, implementation, and testing. The development of this web-based library information system uses php7 language for system functionality because it is very effective for building web-based applications. The result of this study is the development of repository applications that can facilitate students in accessing scientific work in the Library of Banten Jaya University. Using the Repository application can reduce damage, lose scientific work collections, make it easier to use libraries and save space usage and by implementing repository applications are expected to support library performance and assist library users in finding the information they need.

Web Based Security System Academic Exam Questions Using Advanced Encryption Standard

One way to measure the success of the academic process and achievement of student competence, is giving exams, from the smallest level namely daily tests, semester exams, to the highest level, namely the national exam. In an effort to maintain the security of exam question data, there is a data security method known as cryptography. In this research, a security system was designed that serves to protect exam questions so that data cannot be read by student before its time by using the Advanced Encryption Standard (AES) algorithm. The AES algorithm is a type of symmetric algorithm where the encryption and decryption processes have the same key for the encryption and decryption processes. In the system that will be designed, the Caesar Cipher algorithm is used to form an additional key (seed) that is kept secret from the public. The results of this study indicate that AES encryption method can give results maximum so that the AES method can applied to virtual data storage system to protect the transmitted data.

Study on the file management method of data storage system for airborne radar

In order to solve the problem that the air-to-ground data transfer rate is much lower than the radar data rate, the onboard system is commonly used for storing the airborne radar data. However, there are two main problems in the data storage using the traditional file management method. The first is that the frequent data updating of the file allocation table (FAT) and the file directory table (FDT) cause a high frequency of address jumps among the discontinuous areas, which leads to a long response time. The second is that the updating frequencies of the FAT, the FDT and the data region are seriously inconsistent, which results in uneven wear of the three areas. To solve these two problems, a file management method, which optimizes the data writing in the three areas of the FAT, the FDT and the data region, is proposed in this study. An actual measurement is carried out on a data storage system of the airborne radar using the proposed file management method. The result shows that the proposed method significantly reduces the updating frequency of FAT and FDT, and achieves the wear levelling of file area and data region.