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Meij, Richard (author), Soleymani Shishvan, M. (author), Sattarvand, Javad (author)Navigating miners during an evacuation using smart evacuation technology can significantly decrease the evacuation time of an underground mine in case of emergency hazards. This paper presents a mathematical programming model to calculate the most efficient escape path for miners as a critical component of smart evacuation technology. In this...journal article 2024
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Budel, G.J.A. (author), Frasincar, Flavius (author), Boekestijn, David (author)Sequence data mining has become an increasingly popular research topic as the availability of data has grown rapidly over the past decades. Sequence clustering is a type of method within this field that is in high demand in the industry, but the sequence clustering problem is non-trivial and, as opposed to static cluster analysis,...journal article 2024
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de Hoog, E. (author), van der Voort, Tjalie (author), Talmon, A.M. (author), van Rhee, C. (author)Hydraulic transport pipelines in the dredging, mining and deep sea mining are designed using steady-state methods. However, these methods cannot predict density wave formation. Density waves form a risk for pipeline blockages, therefore there is a need to understand and preferably be able to model the process. The density waves studied in...journal article 2024
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Tsui, T.P.Y. (author), Furlan, C. (author), Wandl, Alex (author), van Timmeren, A. (author)Implementing a circular economy in cities has been proposed by policy makers as a potential solution for achieving sustainability in the construction sector. One strategy that has gained interest by both policy makers and companies is to develop “circular construction hubs”: locations that collect, store, and redistribute waste as secondary...journal article 2024
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Xevgenos, Dimitris (author), Tourkodimitri, K. Panteleaki (author), Mortou, M. (author), Mitko, K. (author), Sapoutzi, D. (author), Stroutza, D.E. (author), Turek, M. (author), van Loosdrecht, Mark C.M. (author)Circular economy has become a popular subject, attracting attention from academics, practitioners, and policy-makers alike. However, despite the excitement surrounding it, the concept of circular economy has been criticized for being vague and having multiple interpretations from different fields. As a result, there is a lack of evidence and...journal article 2024
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Morgante, C. (author), Vassallo, F. (author), Cassaro, C. (author), Virruso, G. (author), Diamantidou, D. (author), Van Linden, N. (author), Ktori, R. (author), Rodriguez Pascual, M. (author), Micale, G. (author), Xevgenos, Dimitris (author)Minimum Liquid Discharge (MLD) and Zero Liquid Discharge (ZLD) schemes have been widely proposed in the recent scientific literature not only as a possible solution to brine disposal but also as a non-conventional sustainable source of raw materials. Nevertheless, very few works have pushed the idea towards a real demonstration activity, and...journal article 2024
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Alhaddad, S.M.S. (author), Elerian, M.F.A.I. (author)Turbidity currents have extensively been explored in quiescent environments. However, during several underwater activities (e.g., dredging and deep sea mining), generated turbidity currents could travel in opposite directions and interact with each other, which could largely influence their hydrodynamics and sediment transport capacity....journal article 2024
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Alhaddad, S.M.S. (author), Mehta, D. (author), Helmons, R.L.J. (author)We present an effective design of a hydraulic, polymetallic nodule collector, which fundamentally depends on the Coandă effect in harvesting nodules. The design was first developed based on 2D numerical simulations conducted using a computational fluid dynamics tool, ANSYS FLUENT. Following that, the design was tested in full-scale experiments,...journal article 2023
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Alhaddad, S.M.S. (author), Helmons, R.L.J. (author)To date, hydraulic collection is the most widely considered technology in polymetallic-nodule mining, since there is no direct contact between hydraulic collectors and ocean floor. To construct a hydraulic collector that results in the least sediment disturbance, it is critical to develop an insightful understanding of the interaction between...journal article 2023
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Elerian, M.F.A.I. (author), Huang, Ziyang (author), van Rhee, C. (author), Helmons, R.L.J. (author)We have developed and investigated a hydrodynamic model of Deep-Sea Mining (DSM) collector turbidity flows that captures sediment particle aggregation and breakup. Flocculation is expected to have a significant impact on determining the spread patterns of the turbidity flows and the resulting turbidity currents. The recently validated drift...journal article 2023
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Tondaś, Damian (author), Ilieva, Maya (author), van Leijen, F.J. (author), van der Marel, H. (author), Rohm, Witold (author)The continuous monitoring of ground deformations can be provided by various methods, such as leveling, photogrammetry, laser scanning, satellite navigation systems, Synthetic Aperture Radar (SAR), and many others. However, ensuring sufficient spatiotemporal resolution of high-accuracy measurements can be challenging using only one of the...journal article 2023
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Pannunzio, V. (author), Kleinsmann, M.S. (author), Snelders, H.M.J.J. (author), Raijmakers, J.H.M. (author)Digital health technologies, powered by digital data, provide an opportunity to improve the efficacy and efficiency of health systems at large. However, little is known about different approaches to the use of data for digital health design, or about their possible relations to system-level dynamics. In this contribution, we identify four...journal article 2023
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Liu, Zhihao (author), Zhou, Jianfeng (author), Reniers, G.L.L.M.E. (author)In order to identify and clarify the association between the factors leading to accidents in a petrochemical tank area, this study analyzes investigation reports of 212 petrochemical tank farm accidents and combines this with the “association rule” mining and science related to complex networks. The main risk factors are determined and a risk...journal article 2023
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Solheim, Astrid V. (author), Rauzy, Antoine B. (author), Brett, Per Olaf (author), Ellefmo, Steinar (author), Hatling, Tonje (author), Helmons, R.L.J. (author), Asbjørnslett, Bjørn Egil (author)In this paper, model-based systems engineering (MBSE) and discrete event simulation (DES) are combined to assess the performance of an offshore production system at an early stage. Various systems engineering tools are applied to an industrial case concerning the retrieval of deep-sea minerals, and a simulation engine is developed to...journal article 2023
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Ghosh, D. (author), Kavil, Sarath Pullyottum (author), Arya, Prakash C. (author), Das, Bhaskar (author)Enormous water-logging in ancient abandoned mining shafts of Kolar Gold Fields (KGFs), has largely induced the leaching of sulfide-rich gold minerals contaminating the aquifer system with hazardous elements. Transport of these contaminant has posed threat to the health of the urban population of Kolar township. A detailed survey of borewells,...journal article 2023
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Fallah, Rebecca K. (author), Evers, Jaap (author), Hermans, L.M. (author)Environmental policy integration is needed to ensure environmental policy goals are being realized, given their cross-sectoral nature. Most of the published research has focused on integration and coherence of (inter)national policies, plans, and programs. The implementation practices for these policies, however, are at least as important. This...journal article 2023
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Zhang, Jinlei (author), Chen, Yijie (author), Krishnakumari, P.K. (author), Jin, Guangyin (author), Wang, Chengcheng (author), Yang, Lixing (author)Accurate and reliable short- term passenger flow prediction can support operations and decision-making of the URT system from multiple perspectives. In this paper, we propose a URT multi- step short- term passenger flow prediction model at the network level based on a Transformer-based LSTM network, Depth-wise Attention Block, and CNN network...journal article 2023
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Channa, Faisal (author), Dindar, Muhterem (author), Nguyen, Andy (author), Mishra, R. (author)This study explored the sequential interplay between challenges and regulatory processes in high- and low-performing collaborative groups. 66 students from a Finnish higher education institution participated in a collaborative task in groups of three. Approximately 34 h of video data were coded. The sequential analysis revealed that both...journal article 2023
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Ding, Chuanwei (author), Zhang, Li (author), Chen, Haoyu (author), Hong, Hong (author), Zhu, Xiaohua (author), Fioranelli, F. (author)Radar-based solutions have attracted great attention in human activity recognition (HAR) for their advantages in accuracy, robustness, and privacy protection. The conventional approaches transform radar signals into feature maps and then directly process them as visual images. While effective, these image-based methods may not be the best...journal article 2023
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Cano-Londoño, Natalia A. (author), Capaz, Rafael Silva (author), Hasenstab, Christian (author), Velásquez, Héctor I. (author), McIntyre, Neil (author), Corder, Glen D. (author), Posada Duque, J.A. (author)Purpose: Gold mining has historically and significantly contributed to the Colombian economy. Gold extraction in Colombia is mainly done through two techniques: open-pit and alluvial mining. In this study, the environmental impacts of both these mining systems were analyzed using the life cycle assessment (LCA) framework, including...journal article 2023