Mobile Communication Devices Research Articles

MoNA: A Forensic Analysis Platform for Mobile Communication

Mobile communication devices are a popular means of planning, commissioning and carrying out criminal offenses. In particular, data from messengers such as WhatsApp or Telegram often contain conclusive information. Organized crime also usually involves many devices, but not all of them contain the full history of communication. Rather, it is heavily fragmented due to individual deletions of messages or different joining times to groups. A singular evaluation of individual devices is therefore often not expedient, since important relationships cannot be recognized. Furthermore, communication is often distributed across different channels and modalities and can only be fully and correctly understood through a joint semantic analysis. The linking of related communications of different devices enables an almost complete reconstruction of the communication with a simultaneous reduction in reading effort by merging identical messages. Grouping coherent messages into conversations enables efficient comparison with a knowledge model. Building such a model is complex, but can be supported by a term recommender system. In this paper, MoNA is presented as a platform that implements these approaches and enables an assisted analysis of mobile communications.

On-site illicit-drug detection with an integrated near-infrared spectral sensor: A proof of concept

Illicit-drug production, trafficking and seizures are on an all-time high. This consequently raises pressure on investigative authorities to provide rapid forensic results to assist law enforcement and legal processes in drug-related cases. Ideally, every police officer is equipped with a detector to reliably perform drug testing directly at the incident scene. Such a detector should preferably be small, portable, inexpensive and shock-resistant but should also provide sufficient selectivity to prevent erroneous identifications. This study explores the concept of on-site drugs-of-abuse detection using a 1.8 × 2.2 mm2 multipixel near-infrared (NIR) spectral sensor that potentially can be integrated into a smartphone. This integrated sensor, based on an InGaAs-on-silicon technology, exploits an array of resonant-cavity enhanced photodetectors without any moving parts. A 100% correct classification of 11 common illicit drugs, pharmaceuticals and adulterants was achieved by chemometric modelling of the response of 15 wavelength-specific pixels. The performance on actual forensic casework was investigated on 246 cocaine-suspected powders and 39 MDMA-suspected ecstasy tablets yielding an over 90% correct classification in both cases. These findings show that presumptive drug testing by miniaturized spectral sensors is a promising development ultimately paving the way for a fully integrated drug-sensor in mobile communication devices used by law enforcement.

A survey of Internet of Things in Healthcare

The Internet of Things has played an essential role in many industries over the past few decades. Recent advances in the healthcare industry have made it possible for more people to access healthcare and improve their overall health. Not only is health awareness growing, but mobile information devices are increasingly being used for instant access to health information and fitness applications. The use of mobile communication devices for medical communication is also increasing. Various new sensing devices will be used in remote health monitoring and nursing, especially for sensing various physiological parameters of the elderly and the construction of ubiquitous health networks, which will be a big field of the application of the Internet of things.

Performance Analysis and Optimization of LDM-Based Layered Multicast

The explosion of mobile communication devices and diversification of emerging media content put forward higher requirements for mobile communication networks in various aspects such as overall throughput, fairness and user experience. Fortunately, non-orthogonal multiplexing (NOM) techniques such as layered-division-multiplexing (LDM) and the flexible compatibility of physical layer design in fifth generation mobile networks (5G) open up the possibility to tackle the challenges. In this paper, we propose to use LDM-based layered multicast to improve network performance, where the multicast content is delivered with differentiated quality in different LDM signal layers. For various performance optimization purposes such as maximum throughput, proportional fairness, minimum dissatisfaction index, and maximum service satisfaction index, a unified analysis framework is developed. Under this framework, we formulate a joint optimization problem of layer-user pairing and power allocation. In order to solve this problem, an optimization algorithm based on subproblem decomposition is proposed, which arranges each multicast subscriber of the multicast content to receive the most suitable LDM layer, and finds the optimal transmit power and data rate for each layer. Simulation results demonstrate the superiority of LDM-based layered multicast over existing multicast approaches while guaranteeing the coverage and the lower limit of user experience.

A proof-of-concept formative trial evaluating the interest of multiple connected devices for the early detection of hand-foot skin reactions in patients treated with regorafenib therapy (FACET).

TPS207 Background: Hand-foot skin reaction (HFSR) is a common skin toxicity associated with regorafenib that may lead to drug withdrawal, dose reduction, or drug interruption. Predicting or recognizing early symptoms of HFSR could allow for better care. Digital solutions for ambulatory monitoring of patients provide an opportunity for monitoring and early detection of HFSR in home conditions. Methods: FACET is a phase 4, prospective, open-label, multicenter, interventional trial designed to assess the clinical utility, technical feasibility and usability of a system including a camera, FeetMe Connected insoles for gait assessment, ePRO questionnaires (HFS-14, EQ-5D-5L, FAS and VAS), and educational materials to detect and grade the severity of HFSR. During the study, enrolled patients developing an HFSR will be assigned to the HFSR group and patients without any sign of HFSR, they will be assigned to non-HFSR group. Study registration number at ANSM (French Authority): ID-RCB 2020-A03080-39. Patients will have metastatic colorectal cancer requiring initiation of regorafenib in accordance with clinical practice standard. Other key inclusion criteria are ECOG Performance Status 0-2, ability to understand the instructions and complete the ePRO questionnaires, ability to understand and communicate in French language, familiarity in using mobile communication devices and mobile application software, no previous episode of HFSR or HFS. The primary objective is to explore fit-for-purpose, and usability of the ePRO instruments and the data collecting devices. The primary endpoint is participants’ compliance with data collection measured by ePRO questionnaires completion, use of camera to take images vs expected and number of device days of insoles usage vs expected. Secondary objectives are to characterize variables exhibiting significant associations with development of HFSR. Secondary endpoints include summary statistics of ePRO questionnaires scores at the HFSR worst grade event in the HFSR group vs at 3 weeks in the non-HFSR group; Summary statistics for Feetme Connected insoles variables; Regorafenib dose modifications and treatment discontinuation; Participant’s device daily use to generate data; Participants ability to reach a hotline for technical issues or usability complaints. For HFSR related secondary endpoints, a blinded and independent Preliminary Adjudication Committee (PAC) will retrospectively assign participants to two groups (HFSR vs. no-HFSR) based on a case-by-case blinded assessment. An independent Final Adjudication Committee will compare the PAC assessment and investigators’ assessments done on site. It is planned to include a total of 38 participants from 4 centers. As of September 2021, all sites are open and ready to enroll. Study funded by Bayer.

Network Security and Ideological Security Based on Wireless Communication and Big Data Analysis

The rapid development of information technology has caused unprecedented changes in society and life. People's dependence on information terminals represented by mobile communication devices has greatly increased. The average time spent on information terminals is more than three hours per day, especially for the younger generation. This figure will be even more exaggerated. The West takes the network as an important position for cultural penetration into China and pushes the cultural products of good and bad to China in large quantities. In this context, the study of the relationship between network culture and ideology has become an important node in the construction of ideological security defense. This study first makes a detailed analysis of the concept and research status of network ideology, then discusses the harm of Western ideological network penetration, and puts forward the corresponding countermeasures. According to the characteristics of the current stage, a network ideology big data platform is designed and the detection ability and running time of the platform are analyzed. The results show that the overall performance of the platform is very good and it is more suitable to work in parallel mode.

Road traffic accident as a result of violation of rules on usage of mobile communication devices: international and national experience of prevention

The article is devoted to the analysis of legal acts of such countries as Ukraine, Argentina, Brazil, India, Turkey, Ireland, Great Britain, Spain, Italy, Germany, Denmark, Sweden, the Netherlands on the use of mobile communications while driving. The author draws attention to the fact that in Ukraine, the legal regulation of the rules of use of mobile communications while driving is reflected in the traffic rules and the Code of Administrative Offenses, which do not prohibit their use in the «hands-free».
 According to the analysis of the legislation of Argentina, Brazil, India, Turkey, Ireland, it can be stated that these countries have strict rules on the above issue: strictly prohibit drivers from using phones not only manually but also in «hands-free». Despite this. these countries are in the top 100 of road deaths.
 The countries with the "safest situation" on the roads include: Great Britain, Spain, Ireland, Italy, Germany, Denmark, Sweden, the Netherlands. The legislation of these countries allows drivers to use mobile phones while driving in the «hands‑free» mode, but provides for large fines, penalty points, enshrined rights and responsibilities not only of drivers but also other road users, such as passengers, pedestrians.
 It is possible to draw a conclusion based on the results of the analysis of national and international legislation on the regulation of the use of mobile communications while driving. Restraining factors of non-use mobile communications while driving are large fines, penalty points, clear rights and responsibilities for all road users; organize social campaigns, involve in such programs social networks, media insurance companies, car corporations, driving schools, etc.

Соотношение информационно-технологической и налоговой компоненты для целей устойчивого развития российских регионов

In the article, we study the relationship between the information technology component and the tax potential of Russian regions as factors of economic growth and sustainable development. The aim of the research is to develop and test a methodology for assessing the level of information technology development of the Russian regions and its relationship with their tax status. The research methodology involves the use of factor analysis and the method of principal components using the Rstudio integrated development environment and the statistical package IBM SPSS statistics. The indicators traditionally used in international rankings of the information society development are supplemented with data on the assessment of efforts aimed at creating and implementing innovations. The study is based on the following data for the whole Russia, for federal districts, and for regions of the Russian Federation: the number of active fixed and mobile subscribers, the number of fixed and mobile broadband access subscribers, and the number of mobile communication devices. Our calculations made it possible to identify the worst and best regions in terms of the information and technological development of the territory. We have found that the worst regions are Sevastopol, Crimea, Ingushetia, Dagestan, Adygea. The regions with a highly developed information technology component include St. Petersburg, Moscow, Novosibirsk, Karelia, and Murmansk Oblast. The successful experience of the best regions in terms of the level of digitalization should be studied in detail and competently used in other Russian regions. The study showed that the readiness of the territories for digital transformations is determined by the level of their economic development. The tax potential of the regions is the main factor determining the growth of the gross regional product of the subject of the Russian Federation. Territories with highly developed information technology component form significantly higher tax revenues of the budget system per capita. This creates the basis not only for further increasing of the level of informatization, but also for its successful socio-economic development for regions. Thus, the level of the economic development of the region, its gross regional product and tax potential are the basis for effective digitalization. The accumulation of significant tax revenues creates opportunities for financing activities for the digitalization of the region. Further research could be in the following main areas: a competent increase in the number of indicators used and the expansion of time horizons; application of successfully tested research methods for other states, their groups and international associations; supplementing of the applied methods with models that have proven themselves well when working with short series, for example, ARIMA models

War on woodpeckers: 5G, utility poles and the 1918 Migratory Bird Treaty Act

This article uses environmental perspectives as a framework for analysing mobile communication networks, platforms and devices related to fifth generation (5G) expansion. The article focuses on wooden utility poles, recent actions by the Federal Communications Commission (FCC) and contested Department of the Interior (DOI) interpretations of the Migratory Bird Treaty Act of 1918. The pell-mell expansion of 5G and the Internet of Things (IoT), new deregulatory actions allowing for new equipment on utility poles and controversies regarding the 1918 Bird Act absolving corporations from culpability when they kill birds as part of their business activities (oil spills, construction and similar) create a dangerous mix. These new initiatives pose threats to wildlife including when birds, particularly woodpeckers, interact with wooden utility pole infrastructures. The United States of America is the main geographic setting for this study, although these trends are partially evident in many other nations.

Relationship of Problematic Smartphone Use, Sleep Quality, and Daytime Fatigue Among Quarantined Medical Students During the COVID-19 Pandemic.

Background: The COVID-19 pandemic brought about great transformation to medical education mode. Although mobile communication devices played a crucial role in online learning among quarantined university students, the potential smartphone addition problems, negative health behaviors, and psychological symptoms need considerable attention. This study examined the relationship of problematic smartphone use (PSU), sleep quality, and daytime fatigue among medical students.Methods: A web-based survey was conducted in six polyclinic hospitals in Beijing between February and May 2020. 1016 participants (26.01 ± 2.46 years, 65.16% female) completed self-report measurements including Short Version Smartphone Addiction Scale (SAS-SV), Athens Insomnia Scale (AIS), and Subjective Fatigue Scale (FS). Spearman correlation coefficients and multiple regression models were used to analyze the association among PSU, sleep quality, and daytime fatigue. We used structural equation modeling to test the mediating effect of sleep quality between PSU and daytime fatigue.Results: 49.70% of the participants had PSU. Significant positive correlations were found among SAS-SV, AIS, and FS scores (r = 0.35–0.61, PS < 0.001). Subjects with PSU were more likely to report sleep disturbance (β = 1.07, P < 0.001, OR = 2.91, 95%CI = 2.17–3.91), physical fatigue (β = 1.16, P < 0.001, OR = 3.18, 95%CI = 2.45–4.15), and mental fatigue (β = 0.88, P < 0.001, OR = 2.42, 95%CI = 1.86–3.14). The indirect effect of PSU on physical fatigue and mental fatigue mediated by sleep quality accounted for 50.03 and 45.43% of the total effect, respectively.Conclusions: PSU was significantly associated with sleep disturbance and fatigue among medical students during the COVID-19 pandemic. Sleep quality mediated the relationship between PSU and daytime fatigue. Our results provide valuable information for maintaining medical students' health status and constructing online education structures.

A shorting-pin based compact meander multiband printed monopole antenna

The antenna presented in this work is based on a meandering monopole patch antenna with the incorporated shorting-pin technique for the realization of multiband antenna. The proposed antenna is printed on an FR4 with a footprint of 0.22λg×0.36λg at the lowest operating frequency. The antenna proposed demonstrated six resonances with suitable bandwidth as well as gain which make it suitable for WiMAX, LTE-A, aeronautical radio navigation, sub6GHz band for 5G, and WLAN applications. The prototype of the proposed antenna is fabricated, measured, and presented. The comparative analysis of the proposed antenna with the recently reported works shows that the proposed antenna outperformed its counterpart in terms of size and number of bands. Therefore, the antenna reported in this work is a suitable and promising candidate for future portable mobile communication devices.

Internet of healthcare things security vulnerabilities and jamming attack analysis

AbstractWith the advent of the internet in the recent past, communication and transferring data are no longer challenging. The internet of things (IoT) and many other mobile devices are another paradigm that has evolved lately and plays a significant role in communications. Smart healthcare has been a field of incredible change and growth in the age of smart houses, smart communities and the digital era. Technological expertise and electronics devices have fused, resulting in the internet of healthcare things (IoHT). It is considered to be one of the most required technological progress. However, the IoHT devices, wireless transmission of sensitive patient data poses some obvious security concerns. In addition, with the widespread use of IoHT devices, the foremost challenge is to manage and ensuring security while using IoHT for clinical applications. In this paper, the security and privacy challenges and associated threats in the domain of IoHT are thoroughly reviewed. A real‐time collaborative jamming detection algorithm is proposed, which caters to all the significant challenges being faced. A jamming attack is a sub‐type of denial of service (DoS) attack due to free Wi‐Fi access points (APs) that executes on both mobile devices and Wi‐Fi AP. The proposed algorithm investigates the strength of the received signal and the ratio of packet loss in the mobile devices, whereas the number of connected clients disrupted by the jammer is considered Wi‐Fi AP. The approach aims to mitigate the causes of false alarms by connecting the originator present in the network, interfering with communication between the mobile devices and the Wi‐Fi AP. This approach can be used to detect the presence of a jammer, which may hamper mobile device communication and prevent confidential information, that can be acquired via fake Wi‐Fi AP.

Metamaterial Integrated Folded Dipole Antenna with Low SAR for 4G, 5G and NB-IoT Applications

The fast growth of wireless technology for mobile communication devices requires broad bandwidth, high data rate facilities and compact device size. The solution to the next generation user equipment is high data rate 4G/5G technologies. In this research, wideband antenna design was analyzed and evaluated for 4G, 5G and NB-IoT applications. CST microwave studio was used for simulations and investigations of the performance parameters. The antenna was designed as a folded dipole with a tunable bandwidth and resonates for 5G NR n78, NR-IoT bands B1, B2, and B25, and eleven TDD LTE frequency bands with a bandwidth percentage and minimum scattering loss of 69.02% and −42 dB respectively. Additionally, the designed antenna is small (35 × 48 × 1.62 mm3) and planar in structure and can be easily integrated with radio equipment. The antenna design was also investigated for SAR minimization and gain enhancement using metamaterial integration. For all operating frequency bands, the antenna design results in a considerable gain improvement. The metamaterial was shown to be an excellent absorber of radiation, particularly in high frequency regions. This research also included a SAR examination with and without metamaterial integration. SAR values were found to be significantly reduced throughout all operating bands. The results were validated by fabricating the design prototype on FR-4 substrate for 4G, 5G and IoT bands. The antenna will be possibly used for communication in high data rate applications.

DETERMINATION OF ENTROPY COMPONENT IN SENSOR INDICATORS FOR GENERATION OF CRYPTOGRAPHIC KEYS OF THE MOBILE APPLICATION OF THE CLIENT-BANK SYSTEM

The rapid penetration of the banking market of mobile banking creates not only new opportunities and conveniences, but also new risks and threats, which leads to increased requirements for information security of mobile services. One of the important components of the security of the mobile banking service of the client-bank system is the protection mechanisms based on the use of cryptographic keys. The stability of cryptographic keys is a guarantee of system reliability and, in turn, is based on the mechanisms of generating pseudo-random numbers using primary sources of entropy, for the effective use of which it is necessary to determine the type and capabilities of the source. The paper presents the results of the study of sensors of mobile communication devices as a source of entropy for generating cryptokeys of a mobile application of the client-bank system. An accelerometer, a temperature sensor, a gyroscope, a light brightness sensor, a magnetic field sensor, an atmospheric pressure sensor, a distance sensor, and a humidity sensor are considered as a source of entropy. The results of the research confirm the presence in the values of the sensors of mobile communication devices of a component suitable for use as a source of primary entropy for generators of pseudo-random numbers by cryptographic algorithms. In turn, pseudo-random number generators built with the use of mobile device sensors can be the basis of high-entropy cryptographic key generators in the client-bank system mobile banking services. The obtained results are focused on the implementation of algorithms and means of generating high-entropy pseudo-random numbers and can be used to reduce the risks of unauthorized access to customer information in the client-bank system by disclosing cryptokeys in mobile banking services.

Using cellular data to analyze the tourists' trajectories for tourism destination attributes: A case study in Hualien, Taiwan

This study adopts social network analysis (SNA) to identity the spatial role of nodes in a tourism region. The trajectory of multi-destination tourists will provide great information for tourism management, but tracking tourists' movements is a big challenge. Thanks to the popularity of mobile communication devices (mobile phones) nowadays, these can passively or actively provide information on owners' movement. This study uses call detail records (CDR), which are mobile phone positioning data, to construct a trajectory network of tourists in Hualien, Taiwan. Three types of centralities, as well as brokerage analysis and role analysis, are used to measure the relations in a complicated network. Degree centrality (DC) reveals popular nodes that have good relationships with others directly. Reach closeness centrality (RCC) shows indirect relationships with others. Betweenness centrality (BC) indicates the most important mediator nodes that help others to connect. BC and brokerage analysis are used to classify destinations into five brokers: the coordinator, consultant, gatekeeper, representative, and liaison. We also identify social positions of each destination by role analysis. This study identifies a total of 78 nodes (origins and destinations) and their functions in the tourism network. We find some nodes have more than one mission, while some only have one. The functions of nodes can be different on weekdays and weekends. We distinguish the tourism region into different size of districts. The results of this study can help managers consolidate strategies for tourism marketing.

Средства мобильной связи в учреждениях уголовноисполнительной системы как угроза общественной и личной безопасности граждан

The article considers various viewpoints of scientists on the concept of “security”, which is the subject of the present research. The study of the category “security” is necessary for an objective assessment of the level of threat that mobile communication devices located in institutions of the penitentiary system pose to the public and personal safety of citizens, the state, and society. We put forward recommendations for improving the current Russian legislation.

900 MHz Radiofrequency Field Induces Mitochondrial Unfolded Protein Response in Mouse Bone Marrow Stem Cells.

Objective: To examine whether exposure of mouse bone marrow stromal cells (BMSC) to 900 MHz radiofrequency fields used in mobile communication devices can induce mitochondrial unfolded protein response (UPRmt).Methods: BMSCs were exposed to continuous wave 900 MHz radiofrequency fields (RF) at 120 μW/cm2 power intensity for 4 h/d for 5 consecutive days. Cells in sham group (SH) were cultured in RF exposure system, but without RF radiation. The positive control cells were irradiated with 6 Gy X-ray at a dose rate of 1.103 Gy/min (XR). To inhibit the upstream molecular JNK2 of UPRmt, cells in siRNA + RF, and siRNA + XR group were also pretreated with 100 nM siRNA-JNK2 for 48 h before RF/XR exposure. Thirty minutes, 4 h, and 24 h post-RF/XR exposure, cells were collected, the level of ROS was measured with flow cytometry, the expression levels of UPRmt-related proteins were detected using western blot analysis.Results: Compared with Sham group, the level of ROS in RF and XR group was significantly increased 30 min and 4 h post-RF/XR exposure (P < 0.05), however, the RF/XR-induced increase of ROS level reversed 24 h post-RF/XR exposure. Compared with Sham group, the expression levels of HSP10/HSP60/ClpP proteins in cells of RF and XR group increased significantly 30 min and 4 h post-RF/XR exposure (P < 0.05), however, the RF/XR-induced increase of HSP10/HSP60/ClpP protein levels reversed 24 h post-RF exposure. After interfering with siRNA-JNK2, the RF/XR exposures could not induce the increase of HSP10/HSP60/ClpP protein levels any more.Conclusions: The exposure of 900 MHz RF at 120 μW/cm2 power flux density could increase ROS level and activate a transient UPRmt in BMSC cells. Mitochondrial homeostasis in term of protein folding ability is restored 24 h post-RF exposure. Exposure to RF in our experimental condition did not cause permanent and severe mitochondrial dysfunctions. However, the detailed underlying molecular mechanism of RF-induced UPRmt remains to be further studied.

A Dual-Band and Low-Cost Microstrip Patch Antenna for 5G Mobile Communications

This paper investigates the numerical and experimental analysis of a low-cost and dual-band microstrip patch antenna for the fifth generation (5G) mobile communications. The numerical analysis of the proposed antenna is performed using the computational electromagnetic simulator (CEMS) software which is based on the finite-difference time-domain (FDTD) and CST software which is based on the finite integration technique (FIT). The performance of the proposed antenna designed and fabricated on a low-cost FR-4 substrate is verified with the simulated and measured results. The antenna operates at dual frequency bands which are 24 and 28 GHz. The antenna maximum gain values are 3.20 dBi and 3.99 dBi in the x-y plane at 24 and 28 GHz, respectively. The proposed antenna provides almost omni-directional patterns suitable for 5G mobile communication devices.

Rating Prediction for Mobile Applications via Collective Matrix Factorization Considering App Categories

The rapid development of Internet and mobile communication, smart phone, tablet computer and other mobile devices become widespread, they have become an indispensable part of life, changing the human lifestyle, way of working and learning style, it brings great convenience and fun to us. This paper mainly discusses the status of personalized recommendation system, mobile application and analyse the main problems of recommendation system. This research proposes a rising mobile application domain, which uses web crawling technique to get explicit feedback from a real-world mobile application market. The explicit feedback is the users’ ratings data on Apps and the corresponding category information. To establish a mobile application recommendation model based on user interest and categorization information and propose a novel collective matrix factorization algorithm. Through the crawled data, the improved algorithm, and the traditional collaborative. The traditional mobile application recommendation systems are mostly based on keyword search, popularity, download usage and categories, thus they do not make personalized recommendation to users, and invalid to find applications that users are interested in. Through the user’s historical behaviour, a personalized recommendation system can be established to recommend the applications that fit user’s interests effectively. This paper is based on the collective matrix factorization using user interest such as user’s ratings and category information, designs a personalized recommendation system for mobile applications by using the relationship between them.

Working with readers under quarantine conditions

The main purpose of the article is to present the experience in organizing users’ services at the Universal Literature Circulation Department of the Central Scientific Library (CSL) of the Federal Research Center “Krasnoyarsk Science Center” of the Siberian Branch of the Russian Academy of Sciences (FRC KSC SB RAS) in the period of spring - summer of 2020. Ways of solving the problems that arose in the libraries’ work due to restrictions caused by the COVID-19 pandemic are considered.During the quarantine period, it became necessary to ensure the return and extension of literature in the conditions of limited contacts between the librarian and the reader. The following mechanisms for solving the problems were proposed: the possibility of remote extension of the period of documents usage with the help of a mobile communication device as well as of books return through the “book-box” at the checkpoint of the FRC KSC. When informing users in a remote mode, telephone calls, SMS and e-mail messages were used.The preferences of readers when using various communication systems were analyzed: among the subscribers who used the remote method of extending books usage period, about half of the readers used Viber, one third used WhatsApp and about a fifth – e-mail. The efficiency of the work performed was determined: almost all users settled the matters with the library before August 31. At the same time, most of the books were returned or the period of usage was extended. Several reasons for effective work were highlighted: convenience of online renewal; no time limits for returning books; prompt notification of readers about new opportunities. The advantages of the proposed technology (the fulfillment of quarantine requirements, convenience of remote work for readers, and, as a result, promptness of performing actions on their part) and disadvantages (additional work to preserve information when using the employee’s personal smartphone, lack of personal contact between the librarian and the reader are emphasized.The activity of the Circulation Department is assessed as satisfactory according to the selected set of criteria. The considered method of the Department work, taking into account the quarantine requirements, is recognized as promising.