Distributed Information Systems Research Articles

Combining Blockchains, Smart Contracts, and Complex Sensors Management Platform for Hyper-Connected SmartCities: An IoT Data Marketplace Use Case

In this paper, we demonstrate the multiple points of innovation when combining blockchain technology with Internet of Things (IoT) and security frameworks. The deployment and use of IoT device networks in smart city environments has produced an enormous amount of data. The fact that those data are possessed by multiple sources that use independent systems for data collection, storage, and use impedes the exploitation of their value. Blockchains, as distributed ledgers, can be used for addressing the development of a universal system for data collection and distribution. Smart contracts can be used to automate all the processes of such a network, while at the same time, blockchain and the InterPlanetary File System (IPFS) protect sensitive data through anonymity and distributed storage. An innovative and open IoT blockchain market of applications, data, and services is proposed that: (i) provides the framework upon which objects and people can exchange value in form of virtual currencies, for assets (data and services) received; (ii) defines the motivation incentives according to social and business context for humans and smart objects to interact. The specific marketplace is piloted through a cross-border trial between Santander and Fujisawa, in the context of the M-Sec project, validating thus the interoperability, efficiency, and data protection principles.

PENERAPAN ALGORITMA FIRST FIT UNTUK MEMANAJEMEN PENDISTRIBUSIAN BANTUAN LOGISTIK BENCANA BERBASIS WEB PADA BADAN PENANGGULANGAN BENCANA DAERAH KABUPATEN PONOROGO

In dealing with disasters, the government has a regional institution in charge of disaster management which includes prevention, handling, rehabilitation, reconstruction in a fair and equal manner, namely the Regional Disaster Management Agency. With disaster management efforts, there will be irregularities in the logistics management of aid that will be distributed to residents because the distribution of aid is carried out by various parties. Based on the above problems, it is necessary to have a management system for the distribution of aid that can adjust according to priority needs evenly. In this study, the First Fit algorithm method was used to build a website-based natural disaster aid distribution information system.

Методика логического проектирования информационного обеспечения распределенных информационных систем критического применения

One of the most promising new information technologies is analytical databases that allow us to analyze the dynamics of the behavior of the control object in the historical aspect. The introduction of analytical databases increases the efficiency of information systems. In particular, one of the criteria for effectiveness is the security of an information system, on which analytical databases have a fairly significant impact, which at first glance is not obvious. In the material of this article, the problems of organizing and implementing security in analytical databases will be considered, as well as the method of logical design of information support for distributed information systems of critical application under the prism of ensuring the security of this system.

Эффективность внедрения одноранговой распределенной системы хранения и обработки защищаемой информации (TheOoL Project)

methodology of evaluation of efficiency of the implementation at industrial enterprises of “peer-to-peer distributed systems of storage and processing of protected information in enterprise networks” has been proposed. The efficiency evaluation is based on the comparison of the indicators of reliability, fault tolerance, and total cost of ownership of the implementation of corporate information systems within the proposed system and its possible alternatives. The “peer-to-peer distributed system of storage and processing of protected information” is designed for the protection of distributed computing and incapsulation of private networks without restricting possibilities for usable interactions in the process of implementation of Industry 5.0 and Super Smart Society technologies. When these concepts get implemented in an enterprise, manufacture, logistics, and sales are merged into a global geographically and organizationally distributed information system for data exchange, which functions on top of the Internet. The proposed system offers tools for setting up distributed computing, and it ensures an effective response to threats by applying cryptography, unauthorized access protection with the use of biometry and an innovative protocol for information exchange and control of topology powered by distributed ledger technology, while also optimizing the utilization of computing capacity.

Аналитическое обеспечение организации данных в распределенных информационных системах критического применения

One of the most important tasks in the deployment and operation of a distributed information system of critical application is the organization of the electronic document management subsystem. The purpose of the operation of this subsystem is an uninterrupted, reliable and secure data exchange between users of the system. To achieve this goal, it is necessary to effectively organize and monitor the state of the electronic document management system storage databases. This article will consider approaches to solving this problem in relation to the electronic document management system of a distributed information system of critical application.

Implementation of Geographic Information System for District and City Poverty Data Distribution Using the Rational Unified Process in West Java

Poverty is a fundamental problem that several districts and cities have, especially in West Java province. One important aspect to support the Poverty Reduction Strategy is the availability of poverty data that is accurate and on target with good visualization so that it can facilitate the data analysis process. A website-based Geographic Information System is the right solution for mapping the distribution of poverty data. Making this website using software development methods and the Rational Unified Process (RUP) with the Unified Modeling Language (UML) modeling language tool. For the maps, making process using Quantum GIS software and database storage using PostgreSQL. This website is expected to make it easier for the public to find the latest information and analyze poverty data, especially in districts and cities in West Java.

Анализ закритической устойчивости распределенных информационных систем реального времени

The article describes an approach to the numerical analysis of the stability of distributed information systems under a load that varies over time allowing for a short-term load exceeding critical values. Information systems are considered as imperfect queuing systems in which the intensity of the message flow may depend on the size of the queues of applications. Based on this approach, criteria for the stable and unstable behavior of the system under load are formulated, where the stable behavior of the system is understood as the ability of the system to return to its normal mode of operation independently when the external load drops below the critical value, and unstable one when there is the transition to an emergency state. As examples, the most common types of unstable systems are considered, as well as an example of a distributed system that implements a complex queuing system, which, depending on the characteristics of the service, can be either stable or unstable. The analysis of such a system is carried out, which is confirmed by the results of numerical simulation. Based on the analysis results, zones of stability and instability are determined. Features of the implementation of distributed real-time information systems are considered, practical recommendations for the implementation of sustainable information systems are given

Website-Based Design of Scholarship Information Distribution System for UNWAHA Students

Website-Based Design of Scholarship Information Distribution System for UNWAHA Students

REQUIREMENTS FOR DISTRIBUTED INFORMATION SYSTEMS TO SUPPORT SCIENTIFIC AND EDUCATIONAL ACTIVITIES

To increase the effectiveness of research, it is necessary to have access to systematic infor-mation resources of scientific work. Therefore, in any field of science, it begins with research, the search for scientific information, but with the growing number of scientific articles, books, mon-ographs, patents, the search for information becomes more and more difficult. Creating a unified information system that allows scientists to quickly get acquainted with the results of other scientific research and prevent their duplication. The main tasks of creating a model of a distributed infor-mation system that supports scientific and educational activities, the functional capabilities of the model, the concept of metadata, and the requirements for the metadata profile are described. The task, subject area, subjects, objects, the main functionality of the information system are de-fined, a list of the main types of information resources is provided. The paper analyzes the func-tional requirements for such systems. Purpose. In the process of creating distributed information systems that support scientific and educational activities, it is necessary to study the requirements imposed on the information system. Methods. The article discusses in detail technological methods for construc¬ting models of information systems for supporting scientific and educational activities. Results. Using the requirements, models, metadata of a distributed information system supporting scientific and educational activities, the architecture of the information system was developed and a scheme for exchanging information in the information system through information protocols was presented. Conclusion. The article discusses technological methods of a distributed information sys-tem that supports scientific and educational activities. The main tasks for building a model of a dis-tributed information system supporting scientific and educational activities, ensuring the functional functioning of the model, the concept of metadata for this system, and the requirements for the metadata profile are described. Based on the proposed requirements, the architecture of a distribut-ed information system supporting scientific and educational activities has been developed and the structure has been clearly described.

Логическое проектирование информационного обеспечения распределенных информационных систем критического применения

The article deals with new information technologies for building a data warehouse in a distributed information system of critical application. The existing principles of creating data warehouses, as well as the outlined ways to improve them, are always associated with the collection, storage and use of information that is recorded at a certain point in time, while they store data corresponding to the last time count. This approach to the development and application of data warehouses can be called static, since it does not store or display the behavior of objects at past points in time. However, the objects that are included in the data warehouse have pronounced dynamic properties and therefore must be displayed dynamically. The way out of this situation is the creation of analytical data warehouses, which will provide an opportunity to more effectively solve traditional and qualitatively new tasks in the system under consideration.

Information Security of New Media Art Platform of Distributed System Based on Blockchain Technology

New media art is different from ready-made art, installation art, body art, and land art. New media art is a new art subject category with “optical” media and electronic media as the basic language. And, because of the continuous development of computer networks, distributed database management systems are becoming more and more popular. This article aims to study the information security control problem in the distributed new media system. Through comprehensive access control, reliable support, and many-to-many random mutual encryption, it solves the security requirements of supporting mobile computing in a distributed network environment, communication, and hierarchical grouping. Group key management and other issues have studied some key security technologies for building secure distributed information systems. This article proposes covering the behavior-based access control model ABAC (operation-based access control model), the architecture of the new Trusted Platform Module, the architecture of multithreaded crypto chips, and their service methods, as well as distributed information systems and key management solutions. Approximately obeying the chi-square distribution with 2 degrees of freedom, when the significance level is taken as 5%, the chi-square value for the skin is 5.99. Different initial values are selected for the chaotic sequence, 200 groups of chaotic sequences with a length of 2000 are selected for sequence inspection, and the pass rate is 97.5%. It can be seen that the autocorrelation and cross-correlation characteristics of the improved spatiotemporal chaotic sequence are still relatively ideal, so the usability of the platform is relatively high.

Usability testing of an android application of tractor distribution information system (GIS Tractor)

An android application for tractor system information, namely GIS Tractor, was launched recently. As a new application, it needs usability testing as a part of an assessment. Usability level can affect the ease of use of an application. This study was conducted to measure the acceptability of GIS Tractor based on USE questionnaire evaluation (Usefulness, Satisfaction, and Ease of Use). Online questionnaires are used as a research instrument constructed as five-point Likert rating scales to rate a set of statements. The results showed that GIS Tractor had met the five aspects of usability testing. The use of the GIS tractor android application can assist the user in locating the distribution of tractor within Maros Regency faster than the manual system.

Concerto: Dynamic Processor Scaling for Distributed Data Systems with Replication

A surge of interest in data-intensive computing has led to a drastic increase in the demand for data centers. Given this growing popularity, data centers are becoming a primary contributor to the increased consumption of energy worldwide. To mitigate this problem, this paper revisits DVFS (Dynamic Voltage Frequency Scaling), a well-known technique to reduce the energy usage of processors, from the viewpoint of distributed systems. Distributed data systems typically adopt a replication facility to provide high availability and short latency. In this type of architecture, the replicas are maintained in an asynchronous manner, while the master synchronously operates via user requests. Based on this relaxation constraint of replica, we present a novel DVFS technique called Concerto, which intentionally scales down the frequency of processors operating for the replicas. This mechanism can achieve considerable energy savings without an increase in the user-perceived latency. We implemented Concerto on Redis 6.0.1, a commercial-level distributed key-value store, demonstrating that all associated performance issues were resolved. To prevent a delay in read queries assigned to the replicas, we offload the independent part of the read operation to the fast-running thread. We also empirically demonstrate that the decreased performance of the replica does not cause an increase of the replication lag because the inherent load unbalance between the master and replica hides the increased latency of the replica. Performance evaluations with micro and real-world benchmarks show that Redis saves 32% on average and up to 51% of energy with Concerto under various workloads, with minor performance losses in the replicas. Despite numerous studies of the energy saving in data centers, to the best of our best knowledge, Concerto is the first approach that considers clock-speed scaling at the aggregate level, exploiting heterogeneous performance constraints across data nodes.

Development of an Information System for Storing Digitized Works of the Almaty Academgorodok Research Institutes

The present article describes the architecture of the integrated distributed information system created for storing digitized works of employees of Almaty Akademgorodok research institutes (Kazakhstan) and providing access to them using Web technology. Comparative analysis of two data storage systems for storing digitized works, Ceph and GlusterFS, is provided. The description of the software part of the information system is provided which consists of four subsystems: repository of digital objects, subsystem for managing current research information, subsystem of integration of distributed information resources, subsystem of access to distributed information resources based on Web technologies. The relation between the subsystems and their integration is described. The work defines the requirements to the repository of digital objects. The requirements for the repository of digital objects are defined; a comparative analysis of open source software used for these purposes is made.

Security basic model for applied tasks of the distributed information system

The tasks of modelling and the components of the basic model of applied task protection of a distributed information system have been considered. The measurement and relationship of security parameters, protection, new and reference attacks, anomalies, and threat environments have been proposed. The conditions of threats, attacks and, consequently, inconsistencies in the results of applied tasks are proved. At the beginning of the article the concept of a distributed information system, system of applied tasks, modern trends of zero-trust architecture in building information security systems are discussed. Further, it gives an overview of existing methods of detection and counteraction to attacks based on reference knowledge bases. To improve the level of security it is proposed to analyze the causes of attacks, namely hazards and threats to the system. Attacks, hazards and threats are considered as structured processes that affect the internal and external environment of the system of the applied tasks with a further impact on the output of these tasks. The concepts of security level and security level of a distributed information system are introduced, as well as the concepts of applied task, environment, and user contradictions. As the logical metrics of discrepancy detection the apparatus of semantic analysis is proposed, which (based on the reference knowledge base, the apparatus of text transformations) should be applied at the stage of loading of applied task and describe the input and output data, requirements to the environment of the task solution. The result of the research is the proposed method for identifying additional data about hazards, threats, attacks, countermeasures to attacks, applied task-solving. This data is generated from the reference and augmented textual descriptions derived from the proposed contradictions. By building additional reference images of threats, attacks, countermeasures, it becomes possible to prevent the activation of new attacks on the distributed information system.

FORMATION OF CRM BASED VIRTUAL TRAINING

In the article distance education, advantages of it are informed, the dynamics of development of distance education is shown and the question of formation CRM ­ based distance education is considered. Note for information that distance education is a organized form of educational process on the basis of electronic, telecommunication, software and hardware. Distance education provides long-distance communication between teacher and learner through telecommunications and computer networks based on operative, regular dialogue and feedback. Electronic materials, electronic textbooks, tv programs are presented to learners as forms of information in distance education. Educational institutions must develop a special set of educational and methodological materials for each student to study specific training courses for organizing distance education. As noted, due to the students are on long distance, the main part of the scientific and educational-methodological base of distance education is a virtual information-educational environment. Computer systems, creation of virtual information-educational environment, e-learning methodical fund, electronic catalogs, electronic libraries on the basis of the Internet is the basis of distance education. Distance education is impossible to implement without e-lectures, laboratory works, seminar assignments, methodical instructions for their implementation, which can be obtained through the Internet. That is why the creation and application of a distributed information system is of particular importance for the effective provision of software and hardware opportunities which is equipped the teaching process with e-learning materials, enablied students to use these teaching materials, communicated with teachers, recommended, performed inspection and laboratory assignments and more. For this reason, during the organization of distance education in educational institutions CRM systems can be widely used and its benefits can be used as an intellectual information service. Thus, every university, research institute can use this system to ensure efficiency in their activities. This system can be used to provide the relevant needs of students, teachers, researchers and administration, who are the subjects of scientific and pedagogical activities. First of all, CRM systems define curricula for each specialty of their "clients" (learners) and are investigated suitable information needs. Necessary information is obtained in accordance with the received needs. It should be noted that the ways and sources of obtaining information are different. Thus, information can be obtained from electronic textbooks, data banks, electronic libraries of foreign scientific societies, electronic publications and other resources, as well as various scientific research and educational institutions through scientific cooperation. Through such an approach, the advantages (to choice of place, time, duration and pace of training and to save significantly in financial resources, practicality, time and etc) of distance education can be realized most effectively. Keywords: distance education, electronic materials, electronic textbooks, tv programs, learning computer programs, e-library, distance education organized on basis of CRM.

DeepBlockShield: Blockchain Agent-Based Secured Clinical Data Management Model from the Deep Web Environment

With the growth of artificial intelligence in healthcare and biomedical research, many researchers are interested in large amounts of data in hospitals and medical research centers. Then the need for remote medicine services and clinical data utilization are expanding. However, since the misuse and abuse of clinical data causes serious problems, the scope of its use is bound to have a limited range physically and logically. Then a security-enhanced data distribution system for medical deep web environments. Therefore, in this paper, we propose a blockchain-based clinical data management model named DeepBlockshield to prevent information leakage between the deep web and the surface web. Blockchain supports data integrity and user validation to support data sharing in closed networks. Meanwhile, the agent performs integrity verification between the blockchain and the deep web and strengthens the security between the surface web and the deep web. DeepBlockShield verifies the user’s validity through the records of the deep web and blockchain. Furthermore, we wrap the results analyzed by the valid request into a web interface and provide information to the requester asynchronously. In the experiment, the block generation cycle and size on the delay time was analyzed for verifying the stability of the blockchain network. As a result, it showed that the proposed approach guarantees the integrity and availability of clinical data in the deep web environment.

Fishery Data Distribution System Based on Distance Prior Network Coding Strategy with Buffer Mapping Mechanism

Marine fishery production safety has always been a livelihood issue of high concern to government departments at all levels in China. With the construction of marine informatization, a large number of fishing vessels have entered the Vessel Monitoring System (VMS). The massive, highly concurrent, and continuous track data generated by these vessels has posed great challenges to real-time data distribution. To cope with low distribution efficiency in the original data distribution system, this paper proposed a data distribution model based on the combination of network coding and UDP, which improves both reliability and efficiency of data distribution. In order to further enhance the efficiency of data distribution, a Codeword Distance Priority Protocol based on Buffer Map (CDPPBM) was added to the proposed model for the concentration of innovative codewords in the network, thereby increasing the effectiveness of data received by nodes. Experimental results show that the protocol proposed in this paper improves the data distribution efficiency by about 75% on average, compared with the LT code. The influence of data block size on network coded data distribution system is not involved in the previous work. Therefore, this paper discusses the Block to Piece Protocol (BPP) for large files, divides large files into fixed sizes equally, and distributesndata blocks multiple times to find the optimal piece size. The experimental results show that there is an optimalnfor large files of different sizes, which can maximize the efficiency of data distribution.

Editorial

I am pleased to announce the fourth issue of 2021. As always, I would like to express my sincere appreciation for the great support that makes the continued publication of novel and high quality articles possible. Thus, I would like to thank all authors for their sound research contributions, the reviewers for their very helpful suggestions and the consortium members for their financial support. I would also like to report on further achievements regarding our new platform. We have successfully migrated all the information of the Board of Editors and we have also started to use the new review module. Due to the cooperation with Pensoft Inc., our new platform provider, we will also be able to offer review acknowledgment on the Publons portal in the future. In this regular issue, I am very pleased to introduce four accepted papers from three different countries and 14 involved authors. Martin Berglund, Brink van der Merwe, and Steyn van Litsenborgh from South Africa investigate in their article regular expressions which contain lookaheads in addition to the standard operators of union, concatenation, and Kleene star. Fairouz Fakhfakh, Slim Kallel and Saoussen Cheikhrouhou from Tunisia research and discuss in their work a crucial issue in modern distributed information systems, i.e. how to verify the correctness of Cloud and Fog systems based on formal verification. Marcia Henke, Eulanda Santos, Eduardo Souto, and Altair O. Santin from Brazil introduce their enhanced spam detection system which is based on analyzing the evolution of features. And finally, also from Brazil, Marcelo Aires Vieira, Elivaldo Lozer Fracalossi Ribeiro, Daniela Barreiro Claro, and Babacar Mane investigate the challenging problem of integrating heterogeneous DaaS and DBaaS sources and explore the Data Join (DJ) method for integrating heterogeneous data.

Agents-Based Algorithm for a Distributed Information System in Internet of Things

Traditional information management approaches in distributed systems are most often unsuitable for modern Internet of Things (IoT) environments due to the huge amount and the extreme dynamism of the entities involved. Smart objects (enhanced devices or IoT services belonging to a smart system) interact and maintain relations which need of effective and efficient handling mechanisms better to meet users and services requirements. This article proposes an agent-based algorithm for achieving a distributed resources organization in an IoT environment. Software agents, representing each a single smart object, execute a set of local computations simultaneously, enabling an organized structure to emerge at global level. A natural language processing approach, able to capture the semantic context and represent objects with high-dimensional vectors, was exploited to map the IoT objects, so enabling advanced agents’ operations. The emerging organized virtual structure, i.e., a similarity-based overlay network of agents, allows building <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">informed</i> resource selection/discovery services, therefore more efficient, in a highly dynamic and, basically, unstructured environment. Preliminary results confirm the validity of the approach.