Pub Date : 2019-10-01DOI: 10.1109/ROEDUNET.2019.8909456
Cristian Codau, Rares-Calin Buta, T. Palade, A. Pastrav, P. Dolea, Raluca Simedroni, E. Puschita
This paper presents the implementation, evaluation and validation of a radio system solution able to direct the main radiated lobe towards a target user (beamforming). The comprehensive hardware architecture integrates: (1) the transmitting sub-system, (2) the antenna array sub-system, (3) the synchronization sub-system, (4) the receiving sub-system, and (5) the data processing unit sub-system. Two beamforming algorithms are implemented: Minimum Variance Distorsionless Response and Phase Shift beamformer. The radiant system beamforming capacity is evaluated in terms of maximum pointing deviation of the main lobe relative to the direction where the target user is positioned, First Null Beam Width, and antenna gain.
{"title":"Experimental Evaluation of a Beamforming-capable System using NI USRP Software Defined Radios","authors":"Cristian Codau, Rares-Calin Buta, T. Palade, A. Pastrav, P. Dolea, Raluca Simedroni, E. Puschita","doi":"10.1109/ROEDUNET.2019.8909456","DOIUrl":"https://doi.org/10.1109/ROEDUNET.2019.8909456","url":null,"abstract":"This paper presents the implementation, evaluation and validation of a radio system solution able to direct the main radiated lobe towards a target user (beamforming). The comprehensive hardware architecture integrates: (1) the transmitting sub-system, (2) the antenna array sub-system, (3) the synchronization sub-system, (4) the receiving sub-system, and (5) the data processing unit sub-system. Two beamforming algorithms are implemented: Minimum Variance Distorsionless Response and Phase Shift beamformer. The radiant system beamforming capacity is evaluated in terms of maximum pointing deviation of the main lobe relative to the direction where the target user is positioned, First Null Beam Width, and antenna gain.","PeriodicalId":309683,"journal":{"name":"2019 18th RoEduNet Conference: Networking in Education and Research (RoEduNet)","volume":"163 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133211807","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}
Pub Date : 2019-10-01DOI: 10.1109/ROEDUNET.2019.8909542
Robert Rotsching, D. Tudose
Mesh networks enable communication with lower costs than static networks which use dedicated computers to route traffic and offer access. This has important impact in the areas where they are installed because they can add spatial overhead for the infrastructure and installation requires costs that can be avoided in other way. By installing a mesh network, infrastructure composed of network cables is avoided however, the electrical infrastructure is still needed and restricts devices to be moved. This paper aims to address the issue of dependency on power cables which restricts devices from moving. By constructing a mesh network of devices that don’t require a power infrastructure, the network equipment can be moved from one place to another without affecting their availability. This is useful to apply the solution in other scenarios where mobility is needed and the current solutions can not address due to their fixed position. It is demonstrated that transmission is achieved with mobility and results show how different distances influence communication. One of the most important things observed is that any routing protocols can be used depending on the distances that are desired between devices. The solution permits the use of multiple communication protocols for one device as modules that can be added or removed in the same time with achieving mobility.
{"title":"Versatile Wireless Mesh Networking Platform","authors":"Robert Rotsching, D. Tudose","doi":"10.1109/ROEDUNET.2019.8909542","DOIUrl":"https://doi.org/10.1109/ROEDUNET.2019.8909542","url":null,"abstract":"Mesh networks enable communication with lower costs than static networks which use dedicated computers to route traffic and offer access. This has important impact in the areas where they are installed because they can add spatial overhead for the infrastructure and installation requires costs that can be avoided in other way. By installing a mesh network, infrastructure composed of network cables is avoided however, the electrical infrastructure is still needed and restricts devices to be moved. This paper aims to address the issue of dependency on power cables which restricts devices from moving. By constructing a mesh network of devices that don’t require a power infrastructure, the network equipment can be moved from one place to another without affecting their availability. This is useful to apply the solution in other scenarios where mobility is needed and the current solutions can not address due to their fixed position. It is demonstrated that transmission is achieved with mobility and results show how different distances influence communication. One of the most important things observed is that any routing protocols can be used depending on the distances that are desired between devices. The solution permits the use of multiple communication protocols for one device as modules that can be added or removed in the same time with achieving mobility.","PeriodicalId":309683,"journal":{"name":"2019 18th RoEduNet Conference: Networking in Education and Research (RoEduNet)","volume":"171 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133901939","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}
Pub Date : 2019-10-01DOI: 10.1109/ROEDUNET.2019.8909620
C. Radu, Alexandru Gavril, Ciprian-Octavian Truică, E. Apostol
Internet of Things has rapidly developed over the last years, with sensors collecting extremely large amounts of data. Even though this process is becoming more and more efficient, there is an urgent need for a solution that processes, stores and extracts information in an adequate and efficient manner. Using some of the newest software technologies, this paper presents a data management and visualization solution for the environment data, collected by sensors installed on a robotic machine. In this paper, we present a new architecture for collecting, storing and managing sensor data. Our work-flow starts from the operating system installed on the robot, which is provided with a proper communication channel that allows messages to be exported in a non-relational database compatible format. The collected data is further aggregated, transformed and exposed using the back-end layer of a web application. Finally, the data is displayed using a front-end server, which provides interactive ways for data visualization.
{"title":"Integrated System for Efficiently Managing IoT Data from Robots","authors":"C. Radu, Alexandru Gavril, Ciprian-Octavian Truică, E. Apostol","doi":"10.1109/ROEDUNET.2019.8909620","DOIUrl":"https://doi.org/10.1109/ROEDUNET.2019.8909620","url":null,"abstract":"Internet of Things has rapidly developed over the last years, with sensors collecting extremely large amounts of data. Even though this process is becoming more and more efficient, there is an urgent need for a solution that processes, stores and extracts information in an adequate and efficient manner. Using some of the newest software technologies, this paper presents a data management and visualization solution for the environment data, collected by sensors installed on a robotic machine. In this paper, we present a new architecture for collecting, storing and managing sensor data. Our work-flow starts from the operating system installed on the robot, which is provided with a proper communication channel that allows messages to be exported in a non-relational database compatible format. The collected data is further aggregated, transformed and exposed using the back-end layer of a web application. Finally, the data is displayed using a front-end server, which provides interactive ways for data visualization.","PeriodicalId":309683,"journal":{"name":"2019 18th RoEduNet Conference: Networking in Education and Research (RoEduNet)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132706987","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}
Pub Date : 2019-10-01DOI: 10.1109/ROEDUNET.2019.8909610
Xue Li, Qian Wang, Qian Jia, Juan Shi
Educational evaluation plays an important guiding role in education reform and development. Establishing a scientific and complete comprehensive evaluation system for colleges and universities is an important means to solve the “baton” problem of education evaluation in China at this stage. A large number of comments on university services published on the Internet, which implicated the potential demand of people and the evaluation of universities. Using big data to mine and analyze users’ opinions and deep-seated needs is of great significance for universities to improve service quality and improve people’s satisfaction with education. This paper proposes the idea of constructing a comprehensive evaluation system for universities based on knowledge graph and big data of online comments. First, through the web crawler technology to obtain online comments data from the online communities, forums and socialized Q&A websites and clean the data. Then, the text data is subjected to entity extraction, relationship extraction, and knowledge fusion to construct a domain knowledge graph of the universities. Finally, use the complex network analysis method to determine the comprehensive evaluation system of universities. This evaluation method is not only an important supplement to the existing university evaluation system, but also can provide new ideas for constructing scientific and objective educational evaluation by using new technology.
{"title":"The Framework of Constructing University Comprehensive Evaluation System Based on Online Comments","authors":"Xue Li, Qian Wang, Qian Jia, Juan Shi","doi":"10.1109/ROEDUNET.2019.8909610","DOIUrl":"https://doi.org/10.1109/ROEDUNET.2019.8909610","url":null,"abstract":"Educational evaluation plays an important guiding role in education reform and development. Establishing a scientific and complete comprehensive evaluation system for colleges and universities is an important means to solve the “baton” problem of education evaluation in China at this stage. A large number of comments on university services published on the Internet, which implicated the potential demand of people and the evaluation of universities. Using big data to mine and analyze users’ opinions and deep-seated needs is of great significance for universities to improve service quality and improve people’s satisfaction with education. This paper proposes the idea of constructing a comprehensive evaluation system for universities based on knowledge graph and big data of online comments. First, through the web crawler technology to obtain online comments data from the online communities, forums and socialized Q&A websites and clean the data. Then, the text data is subjected to entity extraction, relationship extraction, and knowledge fusion to construct a domain knowledge graph of the universities. Finally, use the complex network analysis method to determine the comprehensive evaluation system of universities. This evaluation method is not only an important supplement to the existing university evaluation system, but also can provide new ideas for constructing scientific and objective educational evaluation by using new technology.","PeriodicalId":309683,"journal":{"name":"2019 18th RoEduNet Conference: Networking in Education and Research (RoEduNet)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122766555","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}
Pub Date : 2019-10-01DOI: 10.1109/ROEDUNET.2019.8909602
Alina Irina Pîrvan, G. Patru, Dumitru-Cristian Tranca, Cristian Contasel, D. Rosner
Rail transportation, in both city and intercity scenarios is becoming a golden standard for dealing with city congestion and increased commute times. As rail-based alternatives raise in scope and economic impact, monitoring and maintaining rail infrastructure in optimum conditions becomes and increasing challenge for rail transport companies and public infrastructure developers. Rail quality has a determinant role in the overall services quality, average line speeds and perceived ride quality – and is thus a prime candidate for priority monitoring. As rail tracks stretch for thousands of kilometers, monitoring through classical means and technology is work intensive, costly and inefficient. The proposed work aims to empower rail infrastructure companies with the means to constantly monitor and diagnose rail quality in specific segments. The proposed solution consists of a train-mounted device and a set of algorithms capable of detecting deficiencies in the railway tracks. The monitoring system was mounted in order to collect the data inside the tram 41, 42 and on a test bogie in Dudesti depot from Bucharest. The current tests demonstrated the system viability and set the stage for further development into a city-wide monitoring solution.
{"title":"Infrastructure independent rail quality diagnosis and monitoring system","authors":"Alina Irina Pîrvan, G. Patru, Dumitru-Cristian Tranca, Cristian Contasel, D. Rosner","doi":"10.1109/ROEDUNET.2019.8909602","DOIUrl":"https://doi.org/10.1109/ROEDUNET.2019.8909602","url":null,"abstract":"Rail transportation, in both city and intercity scenarios is becoming a golden standard for dealing with city congestion and increased commute times. As rail-based alternatives raise in scope and economic impact, monitoring and maintaining rail infrastructure in optimum conditions becomes and increasing challenge for rail transport companies and public infrastructure developers. Rail quality has a determinant role in the overall services quality, average line speeds and perceived ride quality – and is thus a prime candidate for priority monitoring. As rail tracks stretch for thousands of kilometers, monitoring through classical means and technology is work intensive, costly and inefficient. The proposed work aims to empower rail infrastructure companies with the means to constantly monitor and diagnose rail quality in specific segments. The proposed solution consists of a train-mounted device and a set of algorithms capable of detecting deficiencies in the railway tracks. The monitoring system was mounted in order to collect the data inside the tram 41, 42 and on a test bogie in Dudesti depot from Bucharest. The current tests demonstrated the system viability and set the stage for further development into a city-wide monitoring solution.","PeriodicalId":309683,"journal":{"name":"2019 18th RoEduNet Conference: Networking in Education and Research (RoEduNet)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130554267","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}
Pub Date : 2019-10-01DOI: 10.1109/ROEDUNET.2019.8909642
Cristian Niculiță, L. Dumitriu
This article presents a method for detecting definitions in text, as well as identifying their formal parts, using the predictive capacity of certain relational parts of speech, mainly prepositions but also including words from other lexical categories such as adverbs, pronouns and conjunctions. The method is specifically tailored for Romanian language. Based on their predicting capacity, the relational words can be distributed into four categories that influence the way the definitions are detected. Using an annotated corpus of definitions, a series of statistics is extracted and used to formulate measures describing the impact and usage patterns of these relational words.
{"title":"The Relational Parts of Speech in Text Analysis for Definition Detection, for Romanian Language","authors":"Cristian Niculiță, L. Dumitriu","doi":"10.1109/ROEDUNET.2019.8909642","DOIUrl":"https://doi.org/10.1109/ROEDUNET.2019.8909642","url":null,"abstract":"This article presents a method for detecting definitions in text, as well as identifying their formal parts, using the predictive capacity of certain relational parts of speech, mainly prepositions but also including words from other lexical categories such as adverbs, pronouns and conjunctions. The method is specifically tailored for Romanian language. Based on their predicting capacity, the relational words can be distributed into four categories that influence the way the definitions are detected. Using an annotated corpus of definitions, a series of statistics is extracted and used to formulate measures describing the impact and usage patterns of these relational words.","PeriodicalId":309683,"journal":{"name":"2019 18th RoEduNet Conference: Networking in Education and Research (RoEduNet)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120945812","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}
Pub Date : 2019-10-01DOI: 10.1109/roedunet.2019.8909622
{"title":"RoEduNet 2019 Foreword","authors":"","doi":"10.1109/roedunet.2019.8909622","DOIUrl":"https://doi.org/10.1109/roedunet.2019.8909622","url":null,"abstract":"","PeriodicalId":309683,"journal":{"name":"2019 18th RoEduNet Conference: Networking in Education and Research (RoEduNet)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123390541","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}
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