Telfor Journal最新文献

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Impact of NFV resources distribution on inter-subnetwork latency NFV资源分配对子网间时延的影响
Telfor Journal Pub Date : 2023-01-01 DOI: 10.5937/telfor2301014i
Gjorgji Ilievski, Pero Latkoski
{"title":"Impact of NFV resources distribution on inter-subnetwork latency","authors":"Gjorgji Ilievski, Pero Latkoski","doi":"10.5937/telfor2301014i","DOIUrl":"https://doi.org/10.5937/telfor2301014i","url":null,"abstract":"5G networks are already being implemented around the globe. One of the most important enablers of their penetration are the Software Defined Networking (SDN) technologies and the Network Functions Virtualization (NFV) architecture, which allow the needed flexibility of the network and the composing elements. In such circumstances, the Internet-of-Things (IoT), which has been long awaited, is becoming feasible and economically reasonable. This setup has its challenges, especially due to the network expansion toward the edge, where the number of networking elements and service consumers is rapidly rising. The compute resources and the storage have to be brought in the network proximity of the access network, so that the latency of the service is kept under 1ms, which is one of the base 5G requirements. For our research, we have made an experimental setup of a distributed NFV architecture on a multiple geo-location, with a main objective to review the network latency caused by the architectural distribution of the services that are built in it. The results can be used by researchers and network architects to build reliable and costeffective distributed services with the lowest possible latency, as well as to plan possible disaster recovery scenarios when some physical location is unavailable.","PeriodicalId":37719,"journal":{"name":"Telfor Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135494772","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
Data acquisition for testing potential detection of Flavescence dorée with a designed, affordable multispectral camera 数据采集测试的潜在检测与设计,价格合理的多光谱相机
Telfor Journal Pub Date : 2023-01-01 DOI: 10.5937/telfor2301002b
Marko Barjaktarović, Massimo Santoni, Michele Faralli, Massimo Bertamini, Lorenzo Bruzzone
{"title":"Data acquisition for testing potential detection of Flavescence dorée with a designed, affordable multispectral camera","authors":"Marko Barjaktarović, Massimo Santoni, Michele Faralli, Massimo Bertamini, Lorenzo Bruzzone","doi":"10.5937/telfor2301002b","DOIUrl":"https://doi.org/10.5937/telfor2301002b","url":null,"abstract":"There is a constant push on agriculture to produce more food and other inputs for different industries. Precision agriculture is essential to meet these demands. The intake of this modern technology is rapidly increasing among large and medium-sized farms. However, small farms still struggle with their adaptation due to the expensive initial costs. A contribution in handling this challenge, this paper presents data gathering for testing an in-house made, cost-effective, multispectral camera to detect Flavescence dorée (FD). FD is a grapevine disease that, in the last few years, has become a major concern for grapevine producers across Europe. As a quarantine disease, mandatory control procedures, such as uprooting infected plants and removing all vineyard if the infection is higher than 20%, lead to an immense economic loss. Therefore, it is critical to detect each diseased plant promptly, thus reducing the expansion of Flavescence dorée. Data from two vineyards near Riva del Garda, Trentino, Italy, was acquired in 2022 using multispectral and hyperspectral cameras. The initial finding showed that there is a possibility to detect Flavescence dorée using Linear discriminant analysis (LDA) with hyperspectral data, obtaining an accuracy of 96.6 %. This result justifies future investigation on the use of multispectral images for Flavescence dorée detection.","PeriodicalId":37719,"journal":{"name":"Telfor Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135496120","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
Adaptive thresholding for sparse image reconstruction 稀疏图像重建的自适应阈值
Telfor Journal Pub Date : 2023-01-01 DOI: 10.5937/telfor2301008v
Ivan Volarić, Victor Sucic
{"title":"Adaptive thresholding for sparse image reconstruction","authors":"Ivan Volarić, Victor Sucic","doi":"10.5937/telfor2301008v","DOIUrl":"https://doi.org/10.5937/telfor2301008v","url":null,"abstract":"The performance of the class of sparse reconstruction algorithms which is based on the iterative thresholding is highly dependent on a selection of the appropriate threshold value, controlling a trade-off between the algorithm execution time and the solution accuracy. This is why most of the state-of-the-art reconstruction algorithms employ some method of decreasing the threshold value as the solution converges toward the optimal one. To address this problem we propose a data-driven adaptive threshold selection method based on the fast intersection of confidence intervals (FICI) method, with which we have augmented the two-step iterative shrinkage thresholding (TwIST) algorithm. The performance of the proposed algorithm, denoted as the FICI-TwIST algorithm, has been evaluated on a problem of image reconstruction with the missing pixels, exploiting image sparsity in the discrete cosine transformation domain. The obtained results have shown competitive performance in comparison with a number of state-of-the-art sparse reconstruction algorithms, even outperforming them in some scenarios.","PeriodicalId":37719,"journal":{"name":"Telfor Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135496118","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 a new method of radio-sensor identification of radio-electronic devices 无线电电子设备无线传感器识别新方法的研究
Telfor Journal Pub Date : 2023-01-01 DOI: 10.5937/telfor2301026b
Konstantin Boikov
{"title":"Study of a new method of radio-sensor identification of radio-electronic devices","authors":"Konstantin Boikov","doi":"10.5937/telfor2301026b","DOIUrl":"https://doi.org/10.5937/telfor2301026b","url":null,"abstract":"The purpose of this work is to increase the protection of radio-electronic devices from illegal cloning, by studying a new physically unclonable functions (PUF) connected with the own electromagnetic radiation of a radio-electronic device. The work uses experimental research methods to record the electrical component of the electromagnetic field emitted by the product - the signal radio profile (SRP). Correlation analysis methods for product authentication, Pearson's statistical agreement method for identification are used. The practical significance of the work lies in the possibility of using the SRP to identify a group of devices and radio-technical protection of a radio-electronic product from fakes and illegal copies.","PeriodicalId":37719,"journal":{"name":"Telfor Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135494769","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
Resilient multipath routing protocol to enable hazardous event monitoring with wireless sensor network 弹性多路径路由协议,实现无线传感器网络的危险事件监控
Telfor Journal Pub Date : 2023-01-01 DOI: 10.5937/telfor2301020q
Bálint Üveges, Máté Lőrincz, András Oláh
{"title":"Resilient multipath routing protocol to enable hazardous event monitoring with wireless sensor network","authors":"Bálint Üveges, Máté Lőrincz, András Oláh","doi":"10.5937/telfor2301020q","DOIUrl":"https://doi.org/10.5937/telfor2301020q","url":null,"abstract":"With the growing impact of climate change, the occurrence of hazardous spatial events increases. Wireless sensor networks are suitable to sense, monitor, and report such events in remote or inaccessible locations. Hazardous events are rare compared to the network's lifetime, thus maintaining its consistency must be realized energy efficiently. During the impact, the network must monitor the event with precision, and report the incidence, while mitigating the loss of perishing nodes. To fulfill these requirements, we propose the Self-healing Multipath Routing Protocol that is based on the Heterogeneous Disjoint Multipath Routing Protocol and introduces application-specific extensions to improve network stability, resiliency, and failover. To realize the monitoring of spatially extended hazardous events we introduce an event-based, application-level protocol. To evaluate the routing protocol, we perform simulations utilizing a cellular automaton-based wildfire model as the spatial event and provide measurement results including delivery ratio, consumed energy, and protocol-specific metrics.","PeriodicalId":37719,"journal":{"name":"Telfor Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135494546","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
Compact two-position phase shifter 紧凑型二位移相器
Telfor Journal Pub Date : 2022-01-01 DOI: 10.5937/telfor2201039l
D. Letavin
{"title":"Compact two-position phase shifter","authors":"D. Letavin","doi":"10.5937/telfor2201039l","DOIUrl":"https://doi.org/10.5937/telfor2201039l","url":null,"abstract":"The paper proposes and investigates the topology of a phase shifter based on a directional coupler. The dimensions of such a device are reduced by using artificial transmission lines instead of quarter-wave sections. By connecting several pairs of phase-shifting cells instead of the usual one, it was possible to obtain a phase shifter design with two phase shifts (instead of one).","PeriodicalId":37719,"journal":{"name":"Telfor Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71140746","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: 9
Simulation environment for scalability and performance analysis in hierarchically organized IoT systems 用于分层组织物联网系统中可扩展性和性能分析的仿真环境
Telfor Journal Pub Date : 2022-01-01 DOI: 10.5937/telfor2202085t
Haris Turkmanović, I. Popović, Zoran Čiča, D. Drajić
{"title":"Simulation environment for scalability and performance analysis in hierarchically organized IoT systems","authors":"Haris Turkmanović, I. Popović, Zoran Čiča, D. Drajić","doi":"10.5937/telfor2202085t","DOIUrl":"https://doi.org/10.5937/telfor2202085t","url":null,"abstract":"The accelerated development of technologies, especially in the field of telecommunications, ease the integration of embedded devices within various IoT applications. Modern IoT applications assume heterogenous embedded platforms capable of collecting, processing, and exchanging data between the tiers of the IoT system architecture. Designing a multi-tier IoT system, even in the case of architecture that involves a small number of intelligent embedded devices, can be a very demanding process, especially when dealing with the strict requirements of IoT application concerning application performance, scalability, and energy consumption. In this paper, an open-source simulation framework for the performance analysis of an arbitrary multi-tiered IoT system is presented. Framework supports insight into the data availability within the tiers of IoT system enabling designers to evaluate the performance of IoT application and to engineer the system operation and deployment. Besides the performance analysis, proposed framework enables the analysis of energy consumption, architecture scalability utilizing different communication patterns and technologies. The case study of a large-scale IoT application for demonstrating the framework potential regarding the scalability and data availability analysis is also given.","PeriodicalId":37719,"journal":{"name":"Telfor Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71141056","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
Serious game development of COVID-19 social distancing simulator using agent-based modelling 基于agent建模的COVID-19社交距离模拟器严肃游戏开发
Telfor Journal Pub Date : 2022-01-01 DOI: 10.5937/telfor2202079p
Adi Putra, Gumelar Bimo, W. Teguh, Sulistyono Teguh, Alvin Julian, Gerardo Laksono, Nugraheni Diah
{"title":"Serious game development of COVID-19 social distancing simulator using agent-based modelling","authors":"Adi Putra, Gumelar Bimo, W. Teguh, Sulistyono Teguh, Alvin Julian, Gerardo Laksono, Nugraheni Diah","doi":"10.5937/telfor2202079p","DOIUrl":"https://doi.org/10.5937/telfor2202079p","url":null,"abstract":"A social distancing protocol has been acknowledged and encouraged practically everywhere, since the global COVID-19 epidemic in 2020. This research resulted in the Serious game to simulate social distance using agent-based modeling so that it can be used as a medium of entertainment and educate the public during the Pandemic COVID-19 conditions by developing simulation games using UNITY 3D to educate in the middle of the COVID-19 pandemic and reduce transmission rates on an individual scale.","PeriodicalId":37719,"journal":{"name":"Telfor Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71141474","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
Design, implementation and experimental testing of a hybrid power supply of remote measuring station in the Surveillance, Alert & Warning System (SAWS) 监视、警报和预警系统(SAWS)遥测站混合电源的设计、实现和实验测试
Telfor Journal Pub Date : 2022-01-01 DOI: 10.5937/telfor2201012d
Željko V. Despotović, Marko Tajdić
{"title":"Design, implementation and experimental testing of a hybrid power supply of remote measuring station in the Surveillance, Alert & Warning System (SAWS)","authors":"Željko V. Despotović, Marko Tajdić","doi":"10.5937/telfor2201012d","DOIUrl":"https://doi.org/10.5937/telfor2201012d","url":null,"abstract":"The paper presents the design, implementation and experimental testing of a hybrid power supply of telecommunication and measuring equipment incorporated in remote measuring stations, which are an integral part of the global Surveillance, Alert & Warning System (SAWS) in the Republic of Serbia. In these systems, it is very important to provide autonomy of permanent, reliable and quality power supply. In this case, the power supply system is in effect based on the use of solar energy i.e., photovoltaic (PV), in combination with the mains power supply 230V, 50Hz. Solar power is the primary source of power during the day, while in night conditions the secondary power supply is a distribution power grid (more precisely, the distribution power which is used for supplying the night street lighting). This hybrid power system is realized with two controlled chargers (MPPT solar and mains with input power factor correction), battery bank 12V/110Ah with the corresponding system for its monitoring and secondary DC/DC power converters for supplying telecommunication and measuring electronic modules. The key implementation and experimental results obtained during the realization of a SAWS remote measuring station on the river Ub (municipality of Ub), will be presented in the paper.","PeriodicalId":37719,"journal":{"name":"Telfor Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71140779","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
Logical framework of information technology: Systematization of software development research 信息技术的逻辑框架:软件开发研究的系统化
Telfor Journal Pub Date : 2022-01-01 DOI: 10.5937/telfor2201026s
Maylawati Sa'adillah, Ramdhani Ali
{"title":"Logical framework of information technology: Systematization of software development research","authors":"Maylawati Sa'adillah, Ramdhani Ali","doi":"10.5937/telfor2201026s","DOIUrl":"https://doi.org/10.5937/telfor2201026s","url":null,"abstract":"This article aims to present a comprehensive Logical Framework for Information Technology (IT) Research, specifically for developing customized IT applications or software. The methodology of writing this article uses a content analysis with the main source of literature review, Focus Discussion Group, and also based on the experience and knowledge of the authors as lecturers of Software Engineering and Software Project Management. This article shows that although current IT development approaches or methodologies (especially software development methodology) continue to develop, good IT design is carried out through six main stages, namely planning, analysis, design, construction, implementation, and maintenance. The success of IT implementation depends on the good process of all stages of IT design. The involvement of all actors/ stakeholders in IT design is essential to be accommodated at all stages of IT design. Quality also becomes the main goal and controls every process of IT development.","PeriodicalId":37719,"journal":{"name":"Telfor Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71140798","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: 1
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