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Learning from Literature and Heritage: Stories of Shared Futures Yet to be Told
Get PDFThis editorial is an introduction to the issue of Footprint 34, ‘Narrating Shared Futures’. The issue is dedicated to a transdisciplinary encounter between literature and cultural heritage, namely, here we seek to understand how literature can help us unpack complex meanings of places of heritage, and use that knowledge to imagine, design and produce shared and inclusive futures. We elaborate on three notions that appear in the title of the issue – ‘narrating’, ‘shared’ and ‘futures’ – and then we explain how each of the articles featured in this volume contributes to the proposed framing. We conclude with a brief discussion of ways in which the past, present and future are constantly being made in-the-now through both literary and design techniques
Ruin of the Seaport: Causes of the Abandonment of Puerto Colombia and the Loss of a Coastal Gem
Get PDFThis article delves into the primary factors leading to the closure of Puerto Colombia\u27s Seaport, shifting international port activity to the city of Barranquilla. As the construction of the western breakwater progressed to stabilize the mouth of the Magdalena River, the closure of the pier became a logical consequence, facilitating direct access for deep-draft vessels to Barranquilla\u27s river port. The reasons behind the pier closure seem to be political, social, and economic. The national government, aiming to establish a secure route between the Caribbean Sea and the country\u27s interior, leveraged direct access to the Magdalena River, prompting the relocation of commerce to Barranquilla. Additionally, concerns about the rising incidents of cargo theft during railway transportation and the significant investment in the construction of the western breakwater of the Magdalena River also played a role in the decision. This inquiry sheds light on the discourse emphasizing the advantages of relocating operations to Barranquilla, inadvertently overlooking the history and consequences of such a decision on the urban and social development of Puerto Colombia. To conduct this study, primary sources and relevant texts were employed, enabling an insightful historiographical analysis of documents and narratives. This approach successfully reconstructed the perspective on the issues in Puerto Colombia and Barranquilla. The findings obtained provide a solid foundation for future research related to the impact of infrastructure on urban and social configuration, the manipulation of historical discourse, and the study of coastal populations in their relationship with the environment
The Earliest Residential Area Planning Based on the Neighbourhood Unit Concept in Postwar Japan
Get PDFThe neighbourhood unit concept, proposed in the USA in 1923, was applied in city planning across the world. In Japan, it was introduced in the late 1930s, and current urban planning also uses neighbourhood unit concept as a basic theory for residential area planning. However, the advanced practice of neighbourhood unit concept, which was attempted immediately after the World War II, has not been clarified. This paper clarifies what experiments were made between standardisation studies from before the end of the war and the large-scale application of neighbourhood unit, represented by the Senri New Town development after 1960. three planning proposals were published in journals in the late 1940s and 1950s for actual suburban areas of Japanese metropolises. All were proposed by urban planners and architects, and each had a diverse and highly planned level of spatial design that reflected their own ideas. When collated against the six principles of the neighbourhood unit concept, a certain trend of principles that were faithfully followed and those that were not was apparent. The above has revealed a part of the advanced practice of the neighbourhood unit concept in post-war Japan
Dry port location selection for integration with inland waterway transport in developing countries: A case study in Northern Vietnam
Get PDFDry port has emerged as a critical element of transport infrastructure, eliciting substantial research and investment for its development. The strategic selection of dry port locations not only enhances the effectiveness of connections between seaports and hinterlands but also supports the sustainable advancement of the logistics industry, given that dry port operations can integrate with more environmentally friendly transportation modes, particularly inland waterway transport. Extensive research has been conducted to identify optimal dry port locations within the framework of inland waterway container terminals. Nevertheless, these studies primarily focus on developed economies, leaving a notable research void in developing countries. This paper aims to propose a methodological framework for selecting the most suitable dry port location, with a particular emphasis on integration with inland waterway transport in developing nations. This study implements a combination of the Best-Worst Method (BWM) and Elimination Et Choix Traduisant la Realité III (ELECTRE III) in this domain. An analytical case study of Northern Vietnam, considering five alternative dry ports, is conducted to demonstrate the efficacy of the proposed framework. Twenty-seven Vietnamese experts, categorized into three groups—policymakers and consultants, dry port investors and operators, and dry port users—participate in the decision-making process, contributing insights to this case study. An aggregated group decision-making approach is employed. Four principal criteria—economic, accessibility, location, and environmental—are utilized to assess and rank the five alternatives. The findings reveal that a reduction in transport cost is the most critical sub-criterion, while environmental considerations and railway accessibility receive the lowest priority
Analysis on passenger flow evolution and service facility configuration for large-scale events in outer suburbs
Get PDFAs more and more large-scale winter events are held in different areas, a reasonable configuration of service facilities is crucial for ensuring the successful execution of these events. Based on an analysis of the passenger flow for large-scale events in outer suburbs, this study has developed a dynamic evolution model to well simulate passenger arrival distribution among nodes and queue performance over time. Subsequently, an optimization model for service facility configuration based on node linkage is proposed. Using a large-scale winter event as a case study, we conclude that assigning a higher objective weight to spectators’ queuing time cost in the optimization model leads to an increase in the number of configured service facilities among nodes, thereby enhancing service quality. Different facility layouts for security checks and ticket checks have no significant effects on the optimal number of configured service facilities and spectator queuing time costs. However, implementing a remote security check can alleviate passenger congestion at downstream nodes and reduce the overall queuing time cost. The dynamic evolution model and the service facilities configuration model are suitable for coordinating passenger flow under limited-service facility provision along with measures such as adjusting facility layouts and controlling passenger flow. Thus, a good match between passenger flow distribution and facility service capacity can be achieved. The research conclusions can provide a reference for the analysis of passenger flow, service facility configuration, and passenger flow organization for large-scale events held in the outer suburbs
Submerged low-crested structures in front of coastal structures
Get PDFClimate adaptation of coastal structures has become more important due to climate change, resulting in sea level rise and increased wave loading on coastal structures with depth-limited wave conditions. One of the climate adaptation measures to ensure that existing coastal structures continue to perform their function after unforeseen sea level rise, is to reduce the wave loading before the waves reach the existing coastal structure. This can be achieved by constructing a low-crested structure in front of the existing structure. Between the two structures, structure-induced wave set-up occurs. This structure-induced wave set-up has been studied based on wave flume tests. The effects of structure-induced wave set-up on wave transmission at the low-crested structures and the effects on wave overtopping at the emerged coastal structures were also measured and analyzed.The structure-induced wave set-up depends on the freeboard, wave steepness, and permeability of the low-crested structure. For configurations with impermeable low-crested structures, this wave-set-up does not depend on the distance between the two structures. Empirical expressions to estimate structure-induced wave set-up are derived for impermeable and permeable low-crested structures.The measurements indicate that the effect of structure-induced wave set-up on the wave transmission coefficients is negligibly small.The structure-induced wave set-up increases the wave overtopping discharges at the emerged coastal structure. This effect can be taken into account in wave overtopping estimates by reducing the freeboard with the structure-induced wave set-up
Hidden Markov Models and Flight Phase Identification
Get PDFThe use of Hidden Markov Models (HMMs) in segmenting flight phases is a compelling approach with significant implications for aviation and aerospace research. It leverages the temporal sequences of flight data to delineate various phases of an aircraft’s journey, making it a valuable tool for enhancing the anal- ysis of flight performance and safety. In this work, we implement a multivariate HMM to identify 6 flight phases: taxi, takeoff, climb, cruise, approach and rollout. We reach a median global accuracy of about 97% over a sample of several thousand flights with a very low number of decoded unlikely transitions. Regarding several performance metrics, our method is competitive with existing methods in the litera- ture, such as fuzzy logic. Additionally, it provides, for each point of the flight, a probability of belonging to each phase. Even in situations where there are missing values in the data, HMMs remain effective, ensuring that no critical information is lost during the segmentation process. We show that HMMs work seamlessly with the fine granularity of Flight Data Recorder (FDR) data. HMMs offer remarkable flex- ibility and adaptability, proving particularly effective when the number or order of phases is unknown or not predetermined, as is often the case with complex flight scenarios such as helicopter flights. This adaptability is crucial for handling the diverse range of flight operations that differ from one aircraft to another. An example is given with the segmentation of an Automatic Dependent Surveillance–Broadcast (ADS-B) helicopter flight operated by the Swedish National Police
Compilation and Applications of an Open-Source Dataset on Global Air Traffic Flows and Carbon Emissions
Get PDFThe study of the environmental transition of the aviation sector calls for prospective traffic scenarios. Detailed traffic and emissions inventories are often needed to refine the available analyses and to enable the simulation of regionalised scenarios. In the past studies, these are generally based on commercial, proprietary traffic data, making their dissemination problematic and reducing the reproducibility of the science produced. Open-source alternatives do exist but with limited geographical coverage. This study bridges this gap by presenting an innovative open-source dataset detailing 2019\u27s global air traffic flows and associated CO2 emissions. A comprehensive approach that compiles diverse flight data sources is presented. The remaining data gaps are addressed by constructing a route network through systematic Wikipedia parsing and by estimating the related traffic using socio-economic data. Then, an aircraft performance model to estimate CO2 emissions is implemented. This methodology promises reinforced reproducibility and broader data accessibility in aviation environmental research. Several reference datasets are used to evaluate the accuracy of the open-source dataset. Despite various levels of accuracy for individual routes, major traffic flows are well estimated at the country and continental levels, albeit with room for refinement to ensure consistent data reliability. To facilitate the exploration of the dataset, the AeroSCOPE tool has been developed. To initiate research prospects, use cases of this dataset are proposed, concerning the network potential of electric and hydrogen-powered aircraft and inequalities in air transport
Reviews and Responses for Compilation and Applications of an Open-Source Dataset on Global Air Traffic Flows and Carbon Emissions
Get PDFSee detailed reviews and responses in the PDF file.
DOI for the original paper: https://doi.org/10.59490/joas.2024.736
Reviews and Responses for Securing the Sky: Detecting Aircraft Location Drifting through Cross-Checking Receiver-Based Estimated and Received ADS-B Trajectories
Get PDFSee detailed reviews and responses in the PDF file.
DOI for the original paper: https://doi.org/10.59490/joas.2023.750