NBI Technologies最新文献

{"title":"Possibilities of Application of Methods of X-Ray Phase and X-Ray Diffraction Analysis in the Forensic Science","authors":"K. Smirnov, Vladimir Akatyev, Yulia Amelchenko","doi":"10.15688/nbit.jvolsu.2021.3.6","DOIUrl":"https://doi.org/10.15688/nbit.jvolsu.2021.3.6","url":null,"abstract":"The paper reflects various aspects of the use of X-ray investigation methods, their advantages and application in forensic science of the phase composition of metals, paint and varnish coatings and paintwork materials, fragments of explosive devices. Practical examples of X-ray diffraction analysis application for thin film specimens made on the basis of paints containing alkyd varnish, pigments, fillers and solvents of various colour range have been examined. Influence of true physical broadening, on lines of diffractograms taken for samples exposed to shock wave action was also studied. It was found that this broadening is directly connected with influence of microstrains and fine dispersion of mosaic structure blocks. Based on the obtained X-ray diffraction analysis data, the dislocation density was calculated by three methods. Based on summarized experimental and literature data, the dependence of microstrains on the explosive weight was plotted, which can be used as a reference standard for comparison in expert studies of samples exposed to shock-wave impact.","PeriodicalId":205855,"journal":{"name":"NBI Technologies","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116944507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improved Efficiency of Data Transmission in Wireless Communication Systems with Orthogonal Frequency Multiplexing","authors":"Olga Safonova, Elena Arepyeva, Nadezhda Ermakova","doi":"10.15688/nbit.jvolsu.2021.3.3","DOIUrl":"https://doi.org/10.15688/nbit.jvolsu.2021.3.3","url":null,"abstract":"The active introduction of Orthogonal Frequency Division Multiplexing (OFDM) technology is now beginning to be widely used in wireless transmission systems, television, radio communication, and radio broadcasting. The efficiency of using a dedicated frequency band at a constant high transmission rate allows you to combat interference arising from the transmission of a useful information on the radio channel. A method of improving quality of information transmission in communication systems with orthogonal frequency multiplexing is described. It is shown that with an increase in the number of receiving and transmitting antennas, the noise immunity increases significantly. An experiment was carried out to change the number of receiving-transmitting antennas and the signal-to-noise ratio, and the dependence of the appearance of an error on the number of transmitting antennas was obtained. The work investigated the software model of MIMO OFDM (modulators and demodulators). As a result of the analysis, the dependence of the appearance of the error frequency on the probability of the error was obtained. This showed that the use of OFDM and MIMO places increased demands on channel estimation.","PeriodicalId":205855,"journal":{"name":"NBI Technologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129985301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Data Backup Software Tool Development","authors":"Yana Chumburidze, T. Omelchenko","doi":"10.15688/nbit.jvolsu.2021.3.4","DOIUrl":"https://doi.org/10.15688/nbit.jvolsu.2021.3.4","url":null,"abstract":"Data loss as a result of threats or natural disasters can lead not only to huge financial losses, but also damage the reputation of the company. The most effective way to protect data from loss is backup. The purpose of the study is to select the most appropriate method of data backup and develop a software tool based on it. We discussed the main methods of data backup such as full backup, incremental backup, differential backup, reverse incremental backup and synthetic backup. We identified the following criteria to determine the most appropriate backup method: backup speed, restore speed, backup repository, reliability, network workload, redundancy. We performed a comparative analysis based on the selected criteria to reveal that the most appropriate method of data backup is reverse incremental backup. A functional model, architecture and interface of the software tool have been designed. The main purpose of the software tool is to implement the method of reverse incremental backup to prevent information loss. The conformity of the backup data obtained as a result of performing a reverse backup to the current state of the system is considered to be the achievement of the goal. We conducted a series of experiments that showed that the backup copy corresponds to the current state of the system.","PeriodicalId":205855,"journal":{"name":"NBI Technologies","volume":"204 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116180342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On Some Aspects of Detecting Traces of Human Skin on Porous Surfaces","authors":"V. Vasiliev, T. Ermakova, Yu. V. Druzhinin, I. Afanasiev, V. Akatiev","doi":"10.15688/nbit.jvolsu.2021.4.6","DOIUrl":"https://doi.org/10.15688/nbit.jvolsu.2021.4.6","url":null,"abstract":"During the study of fingerprint examination objects, the forensic expert selects methods and means with which he identifies and examines traces. Since most of the known forensics have an influence on the tracer substance, which in turn is multicomponent, the expert should clearly represent the mechanism of the ongoing processes in the tracer zone. In forensic work, methods and methods are widely described that allow you to work with the most common objects. Most of this information is organized in the form of practical recommendations. However, in the field of fingerprinting and research, theoretical questions regarding the detection of hand marks using chemical methods are still not clearly described. The article provides theoretical information regarding the laws of the mechanism of trace formation on porous (paper) objects, the mechanism of the chemical reaction of the interaction of ninhydrin and its structural analogues with the disturbed substance of the trace. It was concluded that when choosing methods for detecting latent traces of hands on porous objects, it is necessary to take into account not only the mechanisms of trace formation on porous (paper) objects, but also the mechanisms of the chemical reaction of the interaction of ninhydrin and its structural analogues with the trail disturbed substance.","PeriodicalId":205855,"journal":{"name":"NBI Technologies","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132174453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of Innovative Materials for Forensic Examination","authors":"T. Ermakova, V. Vasiliev, Vladimir Akatyev","doi":"10.15688/nbit.jvolsu.2021.2.4","DOIUrl":"https://doi.org/10.15688/nbit.jvolsu.2021.2.4","url":null,"abstract":"In the production of experimental studies related to the modeling of the behavior of human soft tissues in such widespread types of forensic examinations as forensic ballistic, tracological, forensic examination of cold and throwing weapons, forensic medical-use bioimitators. Human corpses, animal carcasses, and their living individuals are used as such objects, but in recent decades, with the development of chemistry and chemical technology, various artificial substitutes have become increasingly widespread – colloidal systems based on gelatin, soap, mixtures of petroleum petrolatum, as well as specialized compositions. Among the main advantages of using soft tissue substitutes are the following: visibility of the results obtained, availability of synthetic materials, uniformity of structure, reproducibility of experimental results with a statistically reliable amount, as well as, if necessary, the possibility of varying mechanical parameters for physical modeling of the characteristics of human biological tissues within the framework of an expert experiment. The paper proposes a technology for obtaining a reusable synthetic compound that allows modeling the properties of human soft tissues. The synthetic compound provides the transfer of general patterns of morphology of the formed gunshot injuries, similar to gunshot wounds on biological materials.","PeriodicalId":205855,"journal":{"name":"NBI Technologies","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130983289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The concept of a Hardware-Software System for Protecting IIoT Devices","authors":"Viktor Lobyzov, V. Shevtsov","doi":"10.15688/nbit.jvolsu.2021.2.3","DOIUrl":"https://doi.org/10.15688/nbit.jvolsu.2021.2.3","url":null,"abstract":"The Internet of Things is a new trend in the development of information technologies, actively spreading as interconnected functional nodes that by default have the means to ensure interaction directly with each other, or with the external environment. The development of such networks is a phenomenon that can radically change the world economy, as well as social processes. As a result of the application of this layer of information technologies, the need for direct human control over actions and operations will be eliminated. One of the most common household examples is a “smart home” – a computer network of interconnected devices using various data transfer protocols with the ability to access this network from an external network. So, thanks to IoT, it is possible to configure devices in the house by remote access. The paper deals with the main security methods against attacks and threats of IIoT devices. The information infrastructure was analyzed, an idea of the architecture of IIoT systems was obtained, and the information transmission path was identified. An analysis of the IIoT regulatory framework governing security, architecture and data exchange in IIoT systems has been carried out, documents governing the Industrial Internet of Things have been identified. The best communication protocol has been identified. Subsequently, the threats of the protocol were selected, and possible means and methods of protection were identified. For IIoT gateways, the concept of a hardware-software complex was presented as a prototype, and a comparison was made with existing solutions.","PeriodicalId":205855,"journal":{"name":"NBI Technologies","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121744667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of Electromagnetic Compatibility of Microprocessor Relay Protection and Automation Devices","authors":"E. Zenina","doi":"10.15688/nbit.jvolsu.2021.2.2","DOIUrl":"https://doi.org/10.15688/nbit.jvolsu.2021.2.2","url":null,"abstract":"In the modern conditions of the development of the electric power complex, relay protection and automation devices play a special role related to protection against possible damage resulting from violations of normal operating modes, both of individual elements and the entire power system as a whole. This, in turn, directly affects the reliable and stable functioning of the main power elements and electrical equipment. Damage to the power part of the equipment of an electric grid complex can be caused by changes in the main parameters of the normal mode: a change (increase) in currents leads to overloads and, in the limit, to short circuits, a decrease in voltage leads to an avalanche of voltage and disruption of the operation of electric motors connected to the damaged section, and an increase in voltage leads to overvoltages in certain sections. In addition, violations associated with a decrease in the transmitted active power lead to a change in frequency, and a violation of the reactive power balance leads to a change in voltage in certain sections, which generally leads to noncompliance with the power balance and loss of stable operation of the power system. The main reasons for failures in operation, false and excessive triggering of microprocessor relay protection devices are considered. The main ways of solving the problem of electromagnetic compatibility in the electric power industry are identified. A solution is proposed to improve the reliability of the operation of microprocessor relay protection devices and the way of development of the problem of electromagnetic compatibility in the electric power industry is shown.","PeriodicalId":205855,"journal":{"name":"NBI Technologies","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125090047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of a Software Package for Ensuring the Security of Web Projects Based on CMS WordPress","authors":"Y. Bakhracheva, Aleksej Panin, Arina Aleeva","doi":"10.15688/nbit.jvolsu.2021.2.1","DOIUrl":"https://doi.org/10.15688/nbit.jvolsu.2021.2.1","url":null,"abstract":"For every company that develops modern Internet projects, one of the most important tasks is to ensure the necessary level of information protection in its web project. When an Internet project developing company consistently protects its information system, it creates a reliable and secure environment for its activities on the World Wide Web. Damage, leakage, lack and theft of information from the site will inevitably lead to a decrease in the level of trust in the organization as a whole, as well as to problems with the law, which is always a loss for each company. For example, there may be losses from the bad reputation of the developer, the lack of customers, the costs of resuming the stable operation of an Internet project based on the WordPress content management system, or the loss of important information contained in the system. In the paper, an algorithm of the software complex was developed, which includes three main blocks: data acquisition and backup creation, processing of information about the system, and the use of protection mechanisms. A software package has been developed to ensure the security of web projects based on CMS WordPress.","PeriodicalId":205855,"journal":{"name":"NBI Technologies","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123208594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On the Influence of Carbon Nanotubes on the Physical and Mechanical Properties of Polypropylene","authors":"Irina Zaporotskova, V. Kalinichenko, L. Kozhitov, P. Zaporotskov, T. Kislova","doi":"10.15688/nbit.jvolsu.2021.2.5","DOIUrl":"https://doi.org/10.15688/nbit.jvolsu.2021.2.5","url":null,"abstract":"One of the most interesting and promising materials of our time is carbon nanotubes. Most applications of nanotubes are associated with the possibility of combining them with other materials in the form of alloys, mixtures, composites or hybrid materials. In particular, the idea of including carbon nanotubes as a filler in various polymer-based matrices (for example, traditional polymers such as thermoplastics, thermosetting materials or elastomers, as well as conjugated polymers) for the formation of polymer/carbon nanotube nanocomposites has revolutionized materials science and engineering. The introduction of carbon nanotubes into the composite structure affects the structure and properties of the polymer binder, as well as the composite material as a whole. Currently, there are no experimental developments on the basis of which the introduction, distribution and stabilization of the dispersion of carbon nanotubes in polymer composites would be implemented in industrial technology. The development of the most effective methods for introducing carbon nanotubes into polymer materials and determining their effect on the physical and mechanical properties of polymers is an urgent and priority task. It is possible that these methods will be able to find application in the industrial production of polymer composite materials intended for use and operation in various extreme conditions (whether it is high temperatures, erosion, high force exposure or highly acidic/highly alkaline environments). The main physical and mechanical properties of polypropylene samples saturated with carbon nanotubes taken at different concentrations (0; 0.01; 0.05 and 0.1 wt. %), who found that the addition of CNT in large quantities negatively affects the tensile and bending strength limits, which may be associated with an increase in the degree of heterogeneity of the structure and the appearance of large agglomerates, which will be points of stress concentration. With an increase in the mass fraction of carbon nanotubes in the polymer nanocomposite, the tangent of the dielectric loss angle increases, which leads to better conductivity of the sample containing a larger number of nanotubes. This may be due to the fact that nanotubes become conductors of electric current in the volume of the polymer matrix.","PeriodicalId":205855,"journal":{"name":"NBI Technologies","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126826170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of the Effectiveness of the Use of Complex Engineering and Technical Means of Protection of Objects of Special Importance","authors":"Y. Bakhracheva, N. Golovacheva","doi":"10.15688/nbit.jvolsu.2021.1.1","DOIUrl":"https://doi.org/10.15688/nbit.jvolsu.2021.1.1","url":null,"abstract":"The paper develops a formalized model for evaluating the effectiveness of the use of complex engineering and technical means of protecting objects of special importance. Algorithms of the software package for evaluating the effectiveness of the use of complex engineering and technical means of protection of objects of special importance have been developed. Experimental studies were conducted to assess the effectiveness of the use of complex engineering and technical means of protecting objects of special importance.","PeriodicalId":205855,"journal":{"name":"NBI Technologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128715436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}