scholarly journals Measurements of LoRaWAN Technology in Urban Scenarios: A Data Descriptor

Data ◽  
2021 ◽  
Vol 6 (6) ◽  
pp. 62
Author(s):  
Pavel Masek ◽  
Martin Stusek  ◽  
Ekaterina Svertoka  ◽  
Jan Pospisil ◽  
Radim Burget ◽  
...  
Keyword(s):  
Signal To Noise Ratio ◽  
Field Measurements ◽  
Area Network ◽  
Wide Area Network ◽  
Received Signal Strength Indicator ◽  
Transceiver Module ◽  
The University ◽  
Long Term Behavior ◽  
The City

This work is a data descriptor paper for measurements related to various operational aspects of LoRaWAN communication technology collected in Brno, Czech Republic. This paper also provides data characterizing the long-term behavior of the LoRaWAN channel collected during the two-month measurement campaign. It covers two measurement locations, one at the university premises, and the second situated near the city center. The dataset’s primary goal is to provide the researchers lacking LoRaWAN devices with an opportunity to compare and analyze the information obtained from 303 different outdoor test locations transmitting to up to 20 gateways operating in the 868 MHz band in a varying metropolitan landscape. To collect the data, we developed a prototype equipped with a Microchip RN2483 Low-Power Wide-Area Network (LPWAN) LoRaWAN technology transceiver module for the field measurements. As an example of data utilization, we showed the Signal-to-noise Ratio (SNR) and Received Signal Strength Indicator (RSSI) in relation to the closest gateway distance.

Small-size LTE/WWAN monopole antenna with octa-band operation for 4 G mobile phone

2016 ◽  
Vol 9 (3) ◽  
pp. 665-673
Author(s):  
Jui-Han Lu ◽  
Ying-Sheng Fang
Keyword(s):  
Mobile Phone ◽  
Monopole Antenna ◽  
Area Network ◽  
Wide Area Network ◽  
Printed Antenna ◽  
Antenna Size ◽  
Term Evolution ◽  
Printed Monopole Antenna ◽  
Printed Monopole

By introducing a modified F-shaped feeding strip and dual parasitic shorted strips, a small-size wireless wide area network/long-term evolution (WWAN/LTE) printed antenna is proposed and embedded in the 4 G mobile phone with octa-band operation. The operating impedance bandwidths (RL ≥ 6 dB) of 263/1093 MHz can be obtained across the LTE/WWAN bands, respectively. The overall antenna size of the proposed printed monopole antenna (MA) is only 35 × 10 × 0.8 mm3. Meanwhile, this small-size MA provides the measured peak gains and antenna efficiencies of 2.0/3.6 dBi and 80/75% for the LTE/WWAN bands, respectively.

The City and University of Dortmund: From Coexistence to Partnership

2002 ◽  
Vol 16 (2) ◽  
pp. 105-112 ◽  
Author(s):  
Stefanie Gerszewski ◽  
Fritz Krieger
Keyword(s):  
Economic Policy ◽  
Structural Policy ◽  
General Development ◽  
Cluster Development ◽  
Strategic Cooperation ◽  
Core Areas ◽  
The University ◽  
The City ◽  
Microsystems Technology

In Germany, the recently launched ‘Dortmund Project’ can be seen as marking the beginning of long-term cooperation between the city of Dortmund and the Universität Dortmund (the University of Dortmund). The development of this strategic cooperation is closely connected with the general development of Dortmund's municipal economic policy It has been the change from a Fordist to a Post-Fordist model that has finally resulted in new approaches towards regional structural policy – as reflected, for example, in the strategy to achieve cluster development. The Dortmund Project, which was initiated by Thyssen-Krupp and the city of Dortmund, aims to strengthen the economic efficiency of Dortmund through the establishment of growth clusters. To this end, the Dortmund Project prioritizes three sectors: information technology; microsystems technology; and logistics – all three of which are core areas of expertise at the Universität Dortmund.

scholarly journals Mapping The Biopolitical Mind: The Rhetorics Of Neoliberal University Networks

2021 ◽  
Author(s):  
Andrew Iliadis
Keyword(s):  
National Culture ◽  
Potential Growth ◽  
Neoliberal Governmentality ◽  
University Planning ◽  
History Of ◽  
New Type ◽  
The University ◽  
The City ◽  
Labour Power

This thesis will begin by sketching a brief history of neoliberal governmentality in relation to the contemporary university before showing how this interconnectivity legitimizes itself inside an institutional framework where the university's role shifts away from the guardianship of national culture to the production of biopolitically charged bodies enmeshed in the rhetoric of excellence. I argue for a rereading of the development of urbanization that is contemporaneous with the increased practice of a long-term neoliberal university planning for potential growth whose stakeholders would include the university, the city and the corporation. The imminantization of capital in the "digital economy" collapses traditional notions of space-time and in the shift from national culture to biopolitically charged studentship there is a shift away from a labour power that produces capital to a new type of human capital; I argue against sociologists of education and in favour of the concept of thought as alienation.

scholarly journals City Scale Particulate Matter Monitoring Using LoRaWAN Based Air Quality IoT Devices

Sensors ◽  
2019 ◽  
Vol 19 (1) ◽  
pp. 209 ◽  
Author(s):  
Steven J. Johnston ◽  
Philip J. Basford ◽  
Florentin M. J. Bulot ◽  
Mihaela Apetroaie-Cristea ◽  
Natasha H. C. Easton ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Air Quality ◽  
Low Cost ◽  
Pilot Project ◽  
Area Network ◽  
Wide Area Network ◽  
Sensor Coverage ◽  
Iot Devices ◽  
The Uk ◽  
The City

Air Quality (AQ) is a very topical issue for many cities and has a direct impact on citizen health. The AQ of a large UK city is being investigated using low-cost Particulate Matter (PM) sensors, and the results obtained by these sensors have been compared with government operated AQ stations. In the first pilot deployment, six AQ Internet of Things (IoT) devices have been designed and built, each with four different low-cost PM sensors, and they have been deployed at two locations within the city. These devices are equipped with LoRaWAN wireless network transceivers to test city scale Low-Power Wide Area Network (LPWAN) coverage. The study concludes that (i) the physical device developed can operate at a city scale; (ii) some low-cost PM sensors are viable for monitoring AQ and for detecting PM trends; (iii) LoRaWAN is suitable for city scale sensor coverage where connectivity is an issue. Based on the findings from this first pilot project, a larger LoRaWAN enabled AQ sensor network is being deployed across the city of Southampton in the UK.

scholarly journals Monitoring System of Transmission Line in Mountainous Area Based on LPWAN

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4898
Author(s):  
Han Zeng ◽  
Pengqi Zuo ◽  
Fangming Deng ◽  
Pei Zhang
Keyword(s):  
Transmission Line ◽  
Monitoring System ◽  
Transmission Lines ◽  
Online Monitoring ◽  
High Reliability ◽  
Mountainous Area ◽  
Area Network ◽  
Wide Area Network ◽  
Mountainous Areas

In light of the difficulty of the inspection and maintenance of a transmission line condition monitoring system in remote mountainous areas, this paper proposes a long-term online monitoring scheme based on a low power wide area network (LPWAN). Considering different failure rates, three monitoring periods of transmission lines in mountainous areas are proposed. An online monitoring framework of transmission lines in mountainous areas was designed based on long range radio (LoRa) and a cellular mobile network, and a dynamic group network model of LoRa was established. The multi-objective particle swarm optimization algorithm can be used to optimize the energy and delay of the system, and then the suitable working mode for the three monitoring periods can be obtained. The simulation results showed that the minimum packet loss rate of the system could be less than 1%, the energy consumption of the system was 80% lower than the existing monitoring system, and the service life of the system can reach 15.13 years under the normal failure rate. Compared with the existing schemes, the proposed work shows the advantages of high reliability transmission, low cost and long-term monitoring, which is especially for transmission line monitoring in mountainous areas.

scholarly journals Short- and Long-Term Impacts of Workplace Relocation: A Survey and Experience from the University of Luxembourg Relocation

2020 ◽  
Vol 12 (18) ◽  
pp. 7506
Author(s):  
François Sprumont ◽  
Ali Shateri Benam ◽  
Francesco Viti
Keyword(s):  
Travel Behavior ◽  
Scientific Literature ◽  
Car Use ◽  
Home Work ◽  
New Business ◽  
Commuting Time ◽  
Short And Long Term ◽  
The University ◽  
The City

Workplace relocation can have a significant impact on commuting trips as well as on the location and number of activities scheduled within the home-work tour. This often exogenous, non-voluntary event affects the entire activity-travel behavior of the employees. As response, employees can adopt several short- and long-term adaptation strategies to cope with such change, the most obvious being commuting mode shifting, acquire new mobility resources (e.g., buying a car) or changing residential location. As workplace relocation can be consequence of national policies aimed at decongesting the city centers or to favor the development of new business areas, undesired macroscopic changes in modal shares and in land developments may be observed. While a decrease in the commuting time after a workplace relocation is, in some cases, observed, an increase in car use for the commuting trip may be observed as well. This paper aims at providing an in-depth understanding of the effect of workplace relocation on travel behavior by reviewing and selecting the relevant scientific literature on the topic, which has in the last years gained popularity. The findings and observations summarized by the literature review are then complemented with the specific example of the relocation of the University of Luxembourg employees. Finally, we indicate potential directions for research, which are currently underexplored.

scholarly journals Performance Analysis of LPWAN Using LoRa Technology for IoT Application

2018 ◽  
Vol 7 (4.11) ◽  
pp. 212 ◽  
Author(s):  
Amir Muaz Abdul Rahman ◽  
Fadhlan Hafizhelmi Kamaru Kamaru Zaman ◽  
Syahrul Afzal Che Abdullah
Keyword(s):  
Signal To Noise Ratio ◽  
Autonomous Vehicle ◽  
New Product ◽  
Wide Area ◽  
Area Network ◽  
Wide Area Network ◽  
Spreading Factor ◽  
Status Information ◽  
Signal Fading ◽  
Vehicle Status

This paper was dedicated to study the performance of an Internet of Things (IoT) application using LoRa Wide Area Network (LoRaWAN). LoRa is a Low Power Wide Area Network (LPWAN) technology developed for IoT applications specifically. Due to the facts that LoRa is a new product, there are questions about its reliability. Hence, a conclusive experiment has been made. The experiment conducted to get an insight to LoRa received signal strength (RSSI) and packet loss. The analysis also includes a measurement of the application Signal to Noise Ratio (SNR) between the transmitter and receiver. The results of the experiment show that with a higher spreading factor, LoRa end device provides more immunity against multi-path and signal fading. The proposed IoT application based on this LoRa technology is for autonomous vehicle status information transmission and intervehicle communications, specifically deployed in UiTM Autonomous Vehicle 1 (UiTM AV1).  

scholarly journals Electromagnetic pollution maps as a resource for assessing the risk of emissions from mobile communications antennas

2020 ◽  
Vol 10 (4) ◽  
pp. 4244
Author(s):  
Yeison Alberto Garces-Gomez ◽  
Vladimir Henao-Cespedes ◽  
Luis Fernando Diaz-Cadavid
Keyword(s):  
Mobile Communications ◽  
Urban Areas ◽  
Mobile Telephone ◽  
Area Network ◽  
Wide Area Network ◽  
Communication Devices ◽  
Telephone Operators ◽  
Electromagnetic Pollution ◽  
The City

Electromagnetic pollution has taken on importance in recent decades, as interest is growing in knowing how the proliferation of mobile communication devices can affect the environment and generate health problems in the population. In this document, a systematic review of the methodologies for measuring electromagnetic radiation is carried out with a view to generating pollution profiles. It also develops a novel methodology for measuring electromagnetic pollution (EMP) in urban areas, and is validated with a case study using a map of EMP in the city of Manizales (Colombia), determining the spatial distribution of radiation levels. In order to generate the map, EMP measurements were carried out in the bands of local mobile telephone operators, in addition to the LPWAN (low power wide area network) LoRaWAN and Sigfox networks, Wi-Fi, and those related to IoT technologies.

The seasonal cycle of biogenic ice-nucleating particles in a boreal forest environment

2020 ◽  
Author(s):  
Julia Schneider ◽  
Kristina Höhler ◽  
Paavo Heikkilä ◽  
Jorma Keskinen ◽  
Barbara Bertozzi ◽  
...  
Keyword(s):  
Boreal Forest ◽  
Seasonal Cycle ◽  
Field Measurements ◽  
Climate Projections ◽  
Research Station ◽  
Forest Environment ◽  
Institute Of Technology ◽  
The University ◽  
Karlsruhe Institute

<p>By triggering the formation of cloud ice crystals in the atmosphere, ice-nucleating particles (INP) strongly influence cloud properties, cloud life cycle and precipitation. Describing the abundance of atmospheric INPs in weather forecasts and climate projections remains challenging, as the global distribution and variability of INPs depend on a variety of different aerosol types and sources. Although widespread field measurements have been conducted, neither short-term variability nor long-term seasonal cycles have yet been well characterized by continuous measurements. In 2018, the University of Helsinki and the Karlsruhe Institute of Technology (KIT) initiated a field campaign HyICE to perform comprehensive long-term INP measurements in the Finnish boreal forest. The campaign took place in Hyytiälä, Southern Finland at the University of Helsinki SMEARII research station (Hari and Kulmala, 2005). KIT provided the INSEKT (Ice Nucleation Spectrometer of the Karlsruhe Institute of Technology) to analyse the INP content of ambient aerosols sampled on filters. INSEKT is able to measure INP concentrations in the immersion-freezing mode at temperatures between 273 K and 248 K. The measurements started in March 2018 and ended in May 2019, which provides a unique continuous long-term time series of INP concentrations for over more than one year with a time resolution of about one to three days. This long-term observation record is used to examine systematic seasonal trends in the INP concentrations and to find meteorological and aerosol related parameters to describe the observed trends and variabilities. These findings will enable to find new parameterizations of atmospheric INP concentrations, as current parameterizations do not reproduce the observed seasonal cycle yet. In addition to INP concentration measurements, heat treatment tests of the aerosol samples have been conducted providing additional indications about the INP types dominating the INP population in the boreal forest, also in dependence on the season. Finally, this contribution will summarize and discuss major findings and implications from the HyICE long-term INP observation.</p><p> </p><p>Hari and Kulmala (2005), Boreal Environ Res. 14, 315-322.</p>

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