NBI Technologies最新文献_第3页

Interaction Mechanism and Technology for Application of New Ultra-Thin Drug Coating of Medical Biliary Stents 医用胆道支架新型超薄药物涂层的相互作用机理及应用技术

NBI Technologies Pub Date : 2022-03-01 DOI: 10.15688/nbit.jvolsu.2022.1.6

D. Zvonareva, E. An, M. Chesheva, Irina Zaporotskova

{"title":"Interaction Mechanism and Technology for Application of New Ultra-Thin Drug Coating of Medical Biliary Stents","authors":"D. Zvonareva, E. An, M. Chesheva, Irina Zaporotskova","doi":"10.15688/nbit.jvolsu.2022.1.6","DOIUrl":"https://doi.org/10.15688/nbit.jvolsu.2022.1.6","url":null,"abstract":"Several years ago, there were no effective methods for treating bile tract structures, but the situation changed significantly with the invention of the stent. The use of biliary stents for the treatment of mechanical jaundice made it easier to remove them from the body. However, it was not possible to stop the appearance of restenosis and thrombosis. To prevent such complications, drug coatings, which are a polymer matrix with drugs introduced into it, began to be applied to the stent surface. At present, despite the rather wide range of drug coatings, the search for new biodegradable carrier polymers that provide a high-quality and inexpensive coating of biliary stents remains relevant. The paper considers the technology of creating a new ultra-thin drug coating for these stents based on polyvinylpyrrolidone with the addition of doxorubicin and carbon nanotubes. The invention proposes the use of carbon nanotubes based on their unique sorption properties. Steps of application of drug coating on stent surface and selection of optimal content of carbon nanotubes in coating composition are described. Theoretical studies of the interaction processes of drug coating components using the quantum-chemical method MNDO have been carried out. GAMESS, Gaussian, GaussView software packages were used for calculations.","PeriodicalId":205855,"journal":{"name":"NBI Technologies","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126986085","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}

引用次数: 0

Creation of Drug Coatings on Medical Arterial Stents Using the Electrochemical Method 电化学法制备医用动脉支架药物涂层

NBI Technologies Pub Date : 2022-03-01 DOI: 10.15688/nbit.jvolsu.2022.1.5

T. Ermakova, V. Fomichev, D. Mordvinkin

{"title":"Creation of Drug Coatings on Medical Arterial Stents Using the Electrochemical Method","authors":"T. Ermakova, V. Fomichev, D. Mordvinkin","doi":"10.15688/nbit.jvolsu.2022.1.5","DOIUrl":"https://doi.org/10.15688/nbit.jvolsu.2022.1.5","url":null,"abstract":"Using the adsorption properties of polyvinylpyrrolidone and the antitrombocytic properties of acetylsalicylic acid in operation, a drug coating was applied to a metal stent by an electrochemical method. Optimal conditions of electrochemical deposition of drug coatings on metal surfaces are selected. The obtained drug coating was evaluated and the thickness of the drug coating was calculated. Drug-coated stents are the most significant innovation in invasive cardiology of the early 21st century. In this regard, methods that allow the rapid, effective and long-term restoration of blood circulation in a damaged vessel are being actively developed. Stenting coronaries that nourish the heart is a sparing intravascular surgery with expansion of stenosed or occluded areas of the arteries by the stent. The mesh structure allows it to be delivered to the installation site in a compressed state, and in place – to expand to the size required by the vessel. Since the implant is a foreign body, the introduction of a stent provokes the activation of blood coagulation mechanisms, which is the cause of restenosis – repeated blockage of the vessel. To reduce the risk of restenosis, a drug coating is applied to the stent to prevent blood clots from forming in blood vessels.","PeriodicalId":205855,"journal":{"name":"NBI Technologies","volume":"205 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131922084","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}

引用次数: 0

Analysis of the Russian Regulatory Base to Ensure the Electromagnetic Compatibility of Microprocessor Relay Protection and Automation Devices 确保微处理器继电保护和自动化装置电磁兼容性的俄罗斯法规基础分析

NBI Technologies Pub Date : 2021-12-01 DOI: 10.15688/nbit.jvolsu.2021.3.2

E. Zenina

{"title":"Analysis of the Russian Regulatory Base to Ensure the Electromagnetic Compatibility of Microprocessor Relay Protection and Automation Devices","authors":"E. Zenina","doi":"10.15688/nbit.jvolsu.2021.3.2","DOIUrl":"https://doi.org/10.15688/nbit.jvolsu.2021.3.2","url":null,"abstract":"In this work, the author analyzed the texts of normative documents on ensuring electromagnetic compatibility (EMC) of microprocessor relay protection devices (MPS), aimed at creating conditions for ensuring the uninterrupted functioning of power circuits of the electric power complex and their secondary circuits, ensuring the tracking of all processes, collecting information, accounting for electricity and operational control of main technological equipment in real EMO conditions. Controversial issues enshrined in regulatory documents were considered, their relevance was assessed. During the analysis of regulatory documents, it was found that in a number of regulatory documents, both Russian and international, there is a direct indication of the need to ensure electromagnetic compatibility at electric power facilities, however, they provide general methods and recommendations without specifying the list of measured and regulated parameters, do not fix the sequence of actions, tools for measuring and modeling, providing the necessary result. In this regard, the author proposes solutions for introducing electromagnetic compatibility into theory and practicein the electric power industry and bringing regulatory documents to updating and systematization in terms of discussed controversial issues, introducing more accurate and consistent actions and measures during the practical implementation of the methods indicated in the work.","PeriodicalId":205855,"journal":{"name":"NBI Technologies","volume":"34 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":"129125515","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}

引用次数: 0

Traffic Behavior Analysis During the Transition from One Level of the Network Hierarchy to Another 网络层次从一层过渡到另一层的流量行为分析

NBI Technologies Pub Date : 2021-12-01 DOI: 10.15688/nbit.jvolsu.2021.3.1

L. Gomazkova, Oleg Bezbozhnov, Osamah Al-Qadi, S. Galich, D. Chadaev

{"title":"Traffic Behavior Analysis During the Transition from One Level of the Network Hierarchy to Another","authors":"L. Gomazkova, Oleg Bezbozhnov, Osamah Al-Qadi, S. Galich, D. Chadaev","doi":"10.15688/nbit.jvolsu.2021.3.1","DOIUrl":"https://doi.org/10.15688/nbit.jvolsu.2021.3.1","url":null,"abstract":"The hierarchical network model is the most preferable in the design of computer networks, as it allows you to create a more stable structure of network, rationally allocate available resources, and also provide a higher degree of data protection. In this work, the study of the behavior of the traffic during the transition from one level of the network hierarchy to another, based on the study of the values of the traffic self-similarity degree during this transition. For the study, a simulation model of a computer network with a hierarchical topology was developed using the NS-3 simulator. Also, a window application was developed in the Visual C# programming language. With the help of this application the degree of self-similarity of the traffic was investigated using the files obtained as a result of processing the trace file. Thus, as a result of the study, it can be stated that any changes in the degree of self-similarity of the network traffic when this traffic moves from one level of the hierarchy to another level depends on such a condition as the direction of traffic movement. The initial degree of selfsimilarity of network traffic also effects on the network traffic self-similarity degree.","PeriodicalId":205855,"journal":{"name":"NBI Technologies","volume":"143 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":"116612455","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}

引用次数: 0

Investigation of Interaction Mechanism of Borocarbon Layer BC3 with Smoke Components SO2, H2S и CO 硼碳层BC3与烟气组分SO2、H2S、CO相互作用机理研究

NBI Technologies Pub Date : 2021-12-01 DOI: 10.15688/nbit.jvolsu.2021.4.5

E. Boroznina, O. Kakorina, K. Smirnov

{"title":"Investigation of Interaction Mechanism of Borocarbon Layer BC3 with Smoke Components SO2, H2S и CO","authors":"E. Boroznina, O. Kakorina, K. Smirnov","doi":"10.15688/nbit.jvolsu.2021.4.5","DOIUrl":"https://doi.org/10.15688/nbit.jvolsu.2021.4.5","url":null,"abstract":"In this paper, we have studied the interaction between two-dimensional sheet BC3 with carbon monoxide (CO), hydrogen sulfide (H2S) and sulfur dioxide (SO2) molecules. These molecules are part of a fire smoke and are extremely hazardous to human health. The aim of our study is to find out the possibility of creating a sensor device based on the BC3 sheet material, which is capable to registers the presence of the molecules in the air. Carbon monoxide, which is also carbon monoxide, is considered the most dangerous in the event of a fire. Carbon monoxide, compared to oxygen, can be more effectively adjacent to hemoglobin, which entails a deterioration in the ability of blood to absorb oxygen. In this regard, oxygen starvation occurs. Sulfurous gas (SO2) is colorless, but has a rather sharp smell and is formed if sulfur is contained in combustible or explosive substances. In addition, sulfurous gas is poisonous, and can form sulfuric acid on the surface of the eyes or airways if affected. It can cause swelling of the larynx and lungs, inflammation of the bronchi. A dangerous concentration for life is only 0.05% even with short-term breathing. Hydrogen sulfide (H2S), like sulfur dioxide, is colorless. However, it has a sweet taste and smell. It is able to be released during fires and during rotting of organic substances. Extremely poisonous gas, affects the eyes and airways. A deadly concentration even in the case of short-term breathing is only 0.1%.","PeriodicalId":205855,"journal":{"name":"NBI Technologies","volume":"40 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":"132691667","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}

引用次数: 0

Surface Functionalization of Boron-Carbon BС5 Nanotubes by a Nitro Group As a Sensor Device Element: Theoretical Research 氮基作为传感器元件的硼碳纳米管表面功能化:理论研究

NBI Technologies Pub Date : 2021-12-01 DOI: 10.15688/nbit.jvolsu.2021.3.5

Irina Zaporotskova, E. Dryuchkov, M. Chesheva, D. Zvonareva

{"title":"Surface Functionalization of Boron-Carbon BС5 Nanotubes by a Nitro Group As a Sensor Device Element: Theoretical Research","authors":"Irina Zaporotskova, E. Dryuchkov, M. Chesheva, D. Zvonareva","doi":"10.15688/nbit.jvolsu.2021.3.5","DOIUrl":"https://doi.org/10.15688/nbit.jvolsu.2021.3.5","url":null,"abstract":"The problem of modification of boron-carbon nanotubes (BCNT) by functional groups is relevant in connection with the intensive development of the nano industry, in particular, nano- and microelectronics. For example, a modified nanotube can be used as an element of a sensor device for detecting microenvironments of various substances, in particular metals included in salts and alkalis. The paper discusses the possibility of creating a high-performance sensor using single-layer boron-carbon nanotubes as a sensitive element, the surface of which is modified with a functional nitro group -NO2. Quantum-chemical studies of the process of attaching a nitro group to the outer surface of a single-layer boron-carbon nanotube (BCNT) of type (6, 6) were carried out, which proved the possibility of modifying the BCNT and the formation of a bond between the group -NO2 and the carbon atom of the surface of the nanotube. The results of computer simulation of interaction of surface-modified boron-carbon nanotube with alkali metal atoms (lithium, sodium, potassium) are presented. The sensory interaction of the modified boron-carbon nanosystem with the selected metal atoms was investigated, which proved the possibility of identifying these atoms using a nanotubular system that can act as an element of the sensor device. When reacting with alkali metal atoms in the “BСNT+NO 2” complex, the number of basic carriers increases, due to the transfer of electron density from metal atoms to modified BСNT. The results presented in this paper were obtained using the molecular cluster model and the calculated DFT method with exchange-correlation functionality B3LYP (valence-split basis set 6-31G).","PeriodicalId":205855,"journal":{"name":"NBI Technologies","volume":"4 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":"132987383","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}

引用次数: 0

Study of Oxygen Interaction with Surface of Boron-Containing Nanotubes 氧与含硼纳米管表面相互作用的研究

NBI Technologies Pub Date : 2021-12-01 DOI: 10.15688/nbit.jvolsu.2021.4.4

S. Boroznin, Irina Zaporotskova, N. Boroznina, D. Zvonareva, P. Zaporotskov, E. an

{"title":"Study of Oxygen Interaction with Surface of Boron-Containing Nanotubes","authors":"S. Boroznin, Irina Zaporotskova, N. Boroznina, D. Zvonareva, P. Zaporotskov, E. an","doi":"10.15688/nbit.jvolsu.2021.4.4","DOIUrl":"https://doi.org/10.15688/nbit.jvolsu.2021.4.4","url":null,"abstract":"Studies of semiconductor carbon nanotubes show that they are extremely sensitive to the chemical environment, and the effects of oxygen drastically change their properties. It has been found that narrow-zone semiconductor carbon tubes can be converted into an apparent metal by such action. Since other types of nanotubes, such as boron-carbon nanotubes of the BC3 type and boron-nitride BN nanotubes, are of great interest, it seems important to investigate whether they are capable of absorbing atomic and molecular oxygen. The study was conducted using the MNDO calculation method within molecular and ion-nested covalent-cyclic cluster models. The results of the study of the interaction of atomic and molecular oxygen with the external surfaces of boron-carbon (BC3), boron-nitride (BN) and boron nanotubes are considered: chair (n, n) and zigzag (n, 0) type. The study was performed by the MNDO method as part of a covalent-cyclic cluster model with embedded ions. Optimal geometry of adsorption complexes is determined and their main electronic and energy properties are described. Boron-carbon nanotubes have been shown to be better oxygen adsorbents than other types of nanotubes considered.","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":"126893669","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}

引用次数: 0

Information Security of Students in an Educational Organization 教育机构学生信息安全研究

NBI Technologies Pub Date : 2021-12-01 DOI: 10.15688/nbit.jvolsu.2021.4.3

V. Yarikov

{"title":"Information Security of Students in an Educational Organization","authors":"V. Yarikov","doi":"10.15688/nbit.jvolsu.2021.4.3","DOIUrl":"https://doi.org/10.15688/nbit.jvolsu.2021.4.3","url":null,"abstract":"The relevance of the issue is due to significant changes in the social, political and economic life of modern society under the influence of the process of mass use of information technologies and the active introduction of distance learning technologies into the education system. An important requirement for ensuring the activities of an educational institution today is to maintain a high level of information security. Moreover, the issues of information security in educational organizations have their own specifics. The analysis of existing threats in the field of information security and the dangers of using Internet resources, social networks is carried out. It is shown that the activity in the field of information security is one of the priority conditions for its development in the field of education in the near future. Information security in the education system as a whole and in each specific educational institution should be a systematic set of measures aimed at the implementation of two main tasks. In addition to protecting the institution’s information system, databases, both internal and external, and preventing hacker attacks, it is also important to protect students from any manifestations of illegal propaganda and manipulation attempts. As a result, the construction of an information security system in educational institutions should be provided by qualified specialists equipped with a modern software and hardware complex.","PeriodicalId":205855,"journal":{"name":"NBI Technologies","volume":"38 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":"114084175","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}

引用次数: 0

Researching Video Conference Services on IEEE 802.11x Wireless Networks IEEE 802.11x无线网络视频会议业务研究

NBI Technologies Pub Date : 2021-12-01 DOI: 10.15688/nbit.jvolsu.2021.4.2

D. Tyukhtyaev

{"title":"Researching Video Conference Services on IEEE 802.11x Wireless Networks","authors":"D. Tyukhtyaev","doi":"10.15688/nbit.jvolsu.2021.4.2","DOIUrl":"https://doi.org/10.15688/nbit.jvolsu.2021.4.2","url":null,"abstract":"The purpose of the study was to determine the dependence of the quality of video conferencing services on the characteristics of wireless communication channels and the number of users in a given network. The characteristics of the signal strength in a wireless network, measured in decibels (dB) were described in this article. The article discusses subjective and objective methods for assessing video. The PSNR and VQM metrics and the MSU Video Quality Measurement Tool software, created by the computer graphics laboratory of the Moscow State University, were used as an objective method for assessing video. For the subjective method, the DSCQS method was used. The PSNR (peak signal to noise ratio) metric is one of the most commonly used metrics. PSNR measures the peak signal-to-noise ratio between the original signal and the signal at the output of the system. PSNR does not measure all video-specific parameters, as the fidelity of the image is constantly changing depending on the visual complexity of the image, the available bit rate and even the compression method. The Video Quality Measurement (VQM) metric is described in Recommendation ITU-R BT.1683. The test results show that VQM has a high correlation with subjective methods for assessing video quality and claims to become the standard in the field of objective quality assessment.","PeriodicalId":205855,"journal":{"name":"NBI Technologies","volume":"12 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":"126227878","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}

引用次数: 0

Mechanism for Ensuring the Reliability of Information System Objects 信息系统对象可靠性保障机制

NBI Technologies Pub Date : 2021-12-01 DOI: 10.15688/nbit.jvolsu.2021.4.1

Elizaveta Bandurova, T. Omelchenko

{"title":"Mechanism for Ensuring the Reliability of Information System Objects","authors":"Elizaveta Bandurova, T. Omelchenko","doi":"10.15688/nbit.jvolsu.2021.4.1","DOIUrl":"https://doi.org/10.15688/nbit.jvolsu.2021.4.1","url":null,"abstract":"It is difficult to imagine the functioning of modern society without information systems of various levels of complexity. Quality control of the functioning of systems is one of the main tasks that should be paid close attention to. One of the criteria for the quality of an information system is reliability, the better the system is, the more reliable it is, and vice versa. In this regard, the purpose of the study is to choose the most appropriate mechanism for ensuring the reliability of information systems. This article discusses the main mechanisms for ensuring the reliability of information system objects such as: error prevention, error detection, error correction, error tolerance; highlighted criteria for their evaluation such as: the ability to restore the initial state of the system, the ability to perform redundancy, fault tolerance, testing, complexity of implementation, the ability to eliminate errors at the stage of system design. The factors determining the occurrence of threats to the objects of information systems and security threats are analyzed. A comparative analysis of the mechanisms for ensuring the reliability of information system objects according to the selected criteria and analyzed factors is carried out. The formalized model, architecture and interface of the software are presented. A series of experimental studies has been carried out.","PeriodicalId":205855,"journal":{"name":"NBI Technologies","volume":"2018 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":"125515621","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}

引用次数: 0