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Ahmad, Bashar I. (author), Rogers, Colin (author), Harman, Stephen (author), Dale, Holly (author), Jahangir, Mohammed (author), Antoniou, Michael (author), Baker, Chris (author), Newman, Mike (author), Fioranelli, F. (author)Automatic target classification or recognition is a critical capability in noncooperative surveillance with radar in several defence and civilian applications. It is a well-established research field and numerous techniques exist for recognizing targets, including miniature unmanned air systems or drones (i.e., small, mini, micro, and nano...journal article 2024
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Middela, Mounisai Siddartha (author), Mahesh, S. (author), McNabola, Aonghus (author), Smith, William (author), Timoney, David (author), Ekhtiari, Ali (author), Fowler, Ben (author), Willis, Paul (author), Rose, Rebecca (author)Assessing real-world emissions from buses and taxis is vital to comprehend their impact on urban air quality. Such vehicles differ significantly from the majority of the fleet owing to their higher mileage rates. However, few studies have focused on specifically assessing the emissions from this segment of the vehicle fleet. In this context,...journal article 2024
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van Herpen, Maarten M.J.W. (author), Saadah, Nicholas H. (author), Otieno, Pieter (author), Kiara, Lemmy (author), Diehl, J.C. (author)Disease surveillance is essential to enable adequate detection and response to disease outbreaks. Syndromic surveillance is used to augment traditional approaches, especially in community-based surveillance. Here we demonstrate that Community Healthcare Workers (CHWs) supported by a mobile phone application can provide community-based syndromic...journal article 2023
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Roosenbrand, E.J. (author), Sun, Junzi (author), Hoekstra, J.M. (author)Contrails contribute to global warming by trapping outgoing terrestrial radiation, exerting an immediate warming influence on the climate. The climatic impact of contrails is potentially comparable to that of aviation’s carbon emissions. This underlines the importance of minimizing contrail formation to mitigate the climate effects of aviation,...conference paper 2023
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Langeveld, J.G. (author), Schilperoort, Remy (author), Heijnen, Leo (author), Elsinga, Goffe (author), Schapendonk, Claudia E.M. (author), Fanoy, Ewout (author), de Schepper, Evelien I.T. (author), Koopmans, Marion P.G. (author), de Graaf, Miranda (author), Medema, G.J. (author)Over the course of the Corona Virus Disease-19 (COVID-19) pandemic in 2020–2022, monitoring of the severe acute respiratory syndrome coronavirus 2 ribonucleic acid (SARS-CoV-2 RNA) in wastewater has rapidly evolved into a supplementary surveillance instrument for public health. Short term trends (2 weeks) are used as a basis for policy and...journal article 2023
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de Graaf, Miranda (author), Langeveld, J.G. (author), Post, Johan (author), Carrizosa, Christian (author), Franz, Eelco (author), Izquierdo-Lara, Ray W. (author), Elsinga, Goffe (author), Heijnen, Leo (author), Medema, G.J. (author)Despite high vaccination rates in the Netherlands, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) continues to circulate. Longitudinal sewage surveillance was implemented along with the notification of cases as two parts of the surveillance pyramid to validate the use of sewage for surveillance, as an early warning tool, and to...journal article 2023
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Roosenbrand, E.J. (author), Sun, Junzi (author), Hoekstra, J.M. (author)As global flight volume rises, the aviation industry is facing increasing climate challenges. One major factor is the impact of contrails, which trap outgoing terrestrial radiation and counteract emission reduction benefits from emission-optimized flight routes. Our study quantifies contrail-forming flights globally and assesses altitude...journal article 2023
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Haifawi, Hani (author), Fioranelli, F. (author), Yarovoy, Alexander (author), van der Meer, Rob (author)A new method to jointly detect and classify drones using a moving surveillance radar system (‘radar on-the-move’) and computer vision is presented. While most conventional counter-drone radar-based techniques focus on time-frequency distributions to obtain classification features, such approaches are limited in volumetric spatial coverage. To...conference paper 2023
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Zheng, Feifei (author), Yin, Hang (author), Ma, Yiyi (author), Duan, Huan Feng (author), Gupta, Hoshin (author), Savic, Dragan (author), Kapelan, Z. (author)Under global climate change, urban flooding occurs frequently, leading to huge economic losses and human casualties. Extreme rainfall is one of the direct and key causes of urban flooding, and accurate rainfall estimates at high spatiotemporal resolution are of great significance for real-time urban flood forecasting. Using existing rainfall...journal article 2023
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van Asten, T. (author), Milias, V. (author), Bozzon, A. (author), Psyllidis, A. (author)Neighborhood safety and its perception are important determinants of citizens’ health and well-being. Contemporary urban design guidelines often advocate urban forms that encourage natural surveillance or “eyes on the street” to promote community safety. However, assessing a neighborhood’s level of natural surveillance is challenging due to its...book chapter 2023
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King, Andrew J. (author), Portugal, Steven J. (author), Strömbom, Daniel (author), Mann, Richard P. (author), Carrillo, José A. (author), Kalise, Dante (author), de Croon, G.C.H.E. (author), Barnett, Heather (author), Scerri, Paul (author)A single sheepdog can bring together and manoeuvre hundreds of sheep from one location to another. Engineers and ecologists are fascinated by this sheepdog herding because of the potential it provides for ‘bio-herding’: a biologically inspired herding of animal groups by robots. Although many herding algorithms have been proposed, most are...journal article 2023
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Izquierdo-Lara, Ray W. (author), Heijnen, Leo (author), Oude Munnink, Bas B. (author), Schapendonk, Claudia M.E. (author), Elsinga, Goffe (author), Langeveld, J.G. (author), Post, Johan (author), Prasad, Divyae K. (author), Medema, G.J. (author)Monitoring of SARS-CoV-2 in wastewater (WW) is a promising tool for epidemiological surveillance, correlating not only viral RNA levels with the infection dynamics within the population, but also to viral diversity. However, the complex mixture of viral lineages in WW samples makes tracking of specific variants or lineages circulating in the...journal article 2023
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Serra Gomez, A. (author), Montijano, Eduardo (author), Böhmer, J.W. (author), Alonso-Mora, J. (author)In this paper, we consider the problem where a drone has to collect semantic information to classify multiple moving targets. In particular, we address the challenge of computing control inputs that move the drone to informative viewpoints, position and orientation, when the information is extracted using a “black-box” classifier, e.g., a deep...journal article 2023
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Sharma, Suryansh (author), Venkata T., Prabhakar (author), Singhal, Shalakha (author), Kuma, Gogineni Gopi Sunanth (author), Venkatesha Prasad, Ranga Rao (author)Surveillance and monitoring are highly critical in many application scenarios like wildlife conservation, restricted areas such as nuclear spillover, and border security. Moreover, in these scenarios, intrusions do not happen frequently thus, conventional surveillance is overkill and expensive that also requires extensive human involvement which...conference paper 2023
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Maas, J.B. (author)Safety is crucial in aviation. This includes the category of General Aviation, which consists of flights that are not performed by commercial airliners. Many of these vehicles are small in comparison to the aircraft used for commercial transport, providing seats for two or four persons. Despite their limited size, accidents involving General...doctoral thesis 2022
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van Brakel, Rosamunde (author), Kudina, O. (author), Fonio, Chiara (author), Boersma, Kees (author)This paper focuses on two examples of the introduction and use of COVID-19 contact tracing apps in The Netherlands (CoronaMelder) and Belgium (Coronalert). It aims to offer a critical, sociotechnical perspective on tracing apps to understand how social, technical, and institutional dimensions form the ingredients for increasing surveillance....journal article 2022
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Roosenbrand, E.J. (author), Sun, Junzi (author), Dedoussi, I.C. (author), Stam, D.M. (author), Hoekstra, J.M. (author)Sustainability is the biggest challenge facing the aerospace industry today. With the global number of flights expected to rise, the climate impact of aviation will continue to increase. Current research states that the rerouting of aircraft through wind-optimisation for the purpose of fuel usage minimisation and emission reduction is an...conference paper 2022
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Roosenbrand, E.J. (author), Sun, Junzi (author), Hoekstra, J.M. (author)One of the biggest challenges facing the aerospace industry today is its sustainability. As the number of flights is expected to rise globally, aviation’s climate impact will continue to increase. Current research has extensively addressed the rerouting of aircraft through wind-optimization in order to minimize fuel burn and emissions. Such...conference paper 2022
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Vlaskin, A. (author), Sun, Junzi (author), Hoekstra, J.M. (author)The consumer drone sector is expected to grow rapidly in the coming decades. In Europe alone, some predictions show as many as seven million drones will be flying by 2050. This poses a challenge for surveillance. In this paper, we study an Automatic Dependent Surveillance system concept similar to the one for current aircraft surveillance, which...conference paper 2022
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Sun, Junzi (author)Interactive Textbook. In the last twenty years, aircraft surveillance has moved from controller-based interrogation to automatic broadcast. The Automatic Dependent Surveillance-Broadcast (ADS-B) is one of the most common methods for aircraft to report their state information like identity, position, and speed. Like other Mode S communications,...book 2021