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The articles in this special section employ histories of cities to examine the relationship between human ambitions and the transformation of space, the development of power discrepancies, and unequal access to material and natural resources. They also reveal the relevance of this quintessential human creation to global dynamics on our planet by unveiling the complex and often messy intersection between urban trajectories, local, imperial, or national histories and longue durée global developments. More than a case study, each article delves into the details of the materiality of the urban history they examine to explain how cities exist in the world, or in Richard Harris's words, "how cities matter" to our shared planetary past and present. In this manner, they answer the call for new conversations about the historical relationship between our urban past and our broader global reality. [ABSTRACT FROM AUTHOR]

When he explained the types of gratitude in the Surah, he mentioned gratitude with types of compounded things, and he referred to his gratitude for compounded things that were not created and that those who existed in the time of the Prophet, may God bless him and grant him peace, did not know about, by saying: (And He creates what you do not know) coupled with the type of compounded things, which indicates that it is of the type of what is compounded with significance. Coupling, and this was seen in God's blessings upon His servants with vehicles that were not known at the time the verse was revealed, such as airplanes and the like. Therefore, riding them is permissible because God does not tolerate anything forbidden, and if it is permissible and the time for prayer enters in it, then the Qur'an, Sunnah, and consensus indicate that God does not burden a person except Its energy, so if a person prays in it, he has activated his energy [ABSTRACT FROM AUTHOR]

This paper introduces an airborne object dataset comprising 22,516 images categorizing four classes of airborne objects: airplanes, helicopters, drones, and birds. The dataset was compiled from YouTube-8 M, Anti-UAV, and Ahmed Mohsen's dataset hosted on Roboflow. Videos were sourced from the first two platforms and converted into individual frames, whereas the latter dataset already consisted of images. Following collection, the dataset underwent labelling and annotation processes utilizing Roboflow's annotation tool, resulting in 7,900 annotations per class. Researchers can leverage this dataset to develop and refine algorithms for airborne object detection and tracking, with potential applications spanning military surveillance, border security, and public safety.

This article examines descriptions of women and airplanes in the pages of American and French interwar fashion magazines. Samples from Femina, La Gazette du Bon Ton, Harper's Bazaar, Ladies Home Journal, Vogue (American and Paris editions), and Women's Wear Daily illustrate how the relationship between women and transportation technology evolved to promote messages of female independence, illustrated by aviatrix ensembles from Madeleine Vionnet and Elsa Schiaparelli. These designs and representations of them in transatlantic media fused the body with the machine, presenting what Jessica Burstein describes as "cold modernism." But these same publications also played on an imperialist sense of superiority, trafficking in racial slurs and cultural bigotry, a preponderant phenomenon described by Anne McClintock in her book Imperial Leather. Ultimately, the spectacularization of aviation and style in fashion media exposed borders that represented either freedom or confinement for women: borders between the nimble body and the clothing that restricted it, between sedentary flesh and flying machine, between the stationary present and the fast-moving future, between the familiar "I" and the unknown other. This article uncovers those technological thresholds and the fashionable women who dared to cross them. [ABSTRACT FROM AUTHOR]

The article discusses research which examined the association between residential distance to airport and blood lead levels (BLL) in children under 6 years old living across all 100 counties in North Carolina from 1992-2015. Cited are the dose-response relationship between child blood lead levels (BLL)and residential proximity to airport,the effect of aviation gas (avgas) exposure on BLL, and the limitations of the study.

Background: Aneurysmal subarachnoid hemorrhage (aSAH) is preferentially treated by prompt endovascular coiling, which is not available in Guadeloupe. Subsequently, patients are transferred to Paris, France mainland, by commercial airplane (6751 km flight) after being managed according to guidelines. This study describes the characteristics, management and outcomes related to these patients. Methods: Retrospective observational cohort study of 148 patients admitted in intensive care unit for a suspected aSAH and transferred by airplane over a 10-year period (2010–2019). Results: The median [interquartile range] age was 53 [45–64] years and 61% were female. On admission, Glasgow coma scale was 15 [13–15], World Federation of Neurological Surgeons (WFNS) grading scale was 1 [1–3] and Fisher scale was 4 [2–4]. External ventricular drainage and mechanical ventilation were performed prior to the flight respectively in 42% and 47% of patients. One-year mortality was 16% over the study period. By COX logistic regression analysis, acute hydrocephalus (hazard ratio [HR] 2.34, 95% confidence interval [CI] 0.98–5.58) prior to airplane transfer, WFNS grading scale on admission (HR 1.53, 95% CI 1.16–2.02) and age (OR 1.03, 95% 1.00–1.07) were associated with one-year mortality. Conclusion: When necessary, transatlantic air transfer of patients with suspected aSAH after management according to local guidelines seems feasible and safe. [ABSTRACT FROM AUTHOR]

In Pittsburgh, Pennsylvania, the skies have become a battleground against time in a world where eveiy second counts. Since its inception in 1978, a revolution has occurred in emergency medical services, with LifeFlight Helicopters soaring to new heights in emergency treatment and transport. This article will explore the transformation of helicopter emergency medical services through the decades, where every rotor blade spins with a mission to save lives and rewrite the rules of survival. Allegheny Health Network's LifeFlight is a rotor-wing (helicopter) aeromedical transport service that provides rapid emergent transport for critically ill and injured persons. The program hub of operations is primarily in Western Pennsylvania. Since its inception in 1978, the program has grown and transformed into the sophisticated, highly technical, expanded scope of practice, critical care transport service it is today. The crews spend a significant portion of clinical care focusing on preparing the patient to survive the transport and ensure stability during transit; this phase of transport is equally crucial as the patient care during the actual flight. This article introduces the evolution and innovations that LifeFlight's medical crews and aviation practices have undergone since the program started. [ABSTRACT FROM AUTHOR]

To investigate whether high cognitive task load (CTL) for aircraft pilots can be identified by analysing heart-rate variability, electrocardiograms were recorded while cadet pilots (n = 68) performed the plane tracking, anti-gravity pedalling, and reaction tasks during simulated flight missions. Data for standard electrocardiogram parameters were extracted from the R–R-interval series. In the research phase, low frequency power (LF), high frequency power (HF), normalised HF, and LF/HF differed significantly between high and low CTL conditions (p <.05 for all). A principal component analysis identified three components contributing 90.62% of cumulative heart-rate variance. These principal components were incorporated into a composite index. Validation in a separate group of cadet pilots (n = 139) under similar conditions showed that the index value significantly increased with increasing CTL (p <.05). The heart-rate variability index can be used to objectively identify high CTL flight conditions. Practitioner summary: We used principal component analysis of electrocardiogram data to construct a composite index for identifying high cognitive task load in pilots during simulated flight. We validated the index in a separate group of pilots under similar conditions. The index can be used to improve cadet training and flight safety. Abbreviations: ANOVA: a one-way analysis of variance; AP: anti-gravity pedaling task; CTL: cognitive task load; ECG: electrocardiograms; HR: heart rate; HRV: heart-rate variability; HRVI: heart-rate variability index; PT: plane-tracking task; RMSSD: root-mean square of differences between consecutive R–R intervals; RT: reaction task; SDNN: standard deviation of R-R intervals; HF: high frequency power; HFnu: normalized HF; LF: low frequency power; LFnu: normalized LF; PCA: principal component analysis. [ABSTRACT FROM AUTHOR]

BACKGROUND: Militaries have historically utilised generic physical fitness tests to assess physical readiness, but there has been a recent shift to develop physical employment standards (PES) based on actual job demands. OBJECTIVE: The purpose of this investigation was to characterise the physical demands of critical tasks performed by Royal Australian Air Force (RAAF) personnel to inform PES development. METHODS: Job task analysis were performed for 27 RAAF trades. Criterion tasks were identified through a systematic approach involving workshops and field-observations. The identified tasks were assessed for dominant physical capacity and grouped into movement-based clusters. Psychophysiological measures were collected from personnel performing the tasks. RESULTS: Of 87 criterion tasks, 92% were characterised as manual handling dominant. Across these 87 tasks the principal physical capacities were: muscular strength (59%), muscular endurance (52%) and cardiorespiratory endurance (39%). The most common movement clusters were Lift to Platform (44%) and Lift and Carry (38%). Lift to Platform tasks required lifting to a median height of 1.32 m (1.20 –1.65 m) and a median mass of 25.0 kg (21.0 –28.9 kg) per person. Median carry mass was 25.0 kg (22.4 –36.1 kg) per person and distance was 26.0 m (17.5 –50.0 m). Median task mean 'Vdot;O2, HR and RPE were 1.8 L.min- 1 (1.5–2.2 L.min- 1), 137 b.min- 1 (120–144) and 13 (12–14). CONCLUSIONS: The high proportion of manual handling criterion tasks emphasises the importance of these activities and the underlying physical capacities for RAAF personnel. Current fitness assessments are unlikely to predict job task performance. [ABSTRACT FROM AUTHOR]

Electrically powered airplanes can cope with global warming by reducing the use of fossil fuels and reduce airplane costs in the long run through the efficient use of energy. For this reason, advanced aviation countries such as the United States and several countries in the European Union are leading the development of innovative technologies to realize a fully electric airplane in the future. Currently, research and development efforts are underway domestically to convert existing two-seater airplanes into electric-powered airplanes. In this study, the KLA-100X, which was developed by converting the existing two-seat lightweight sport airplane KLA-100 into an electric propulsion airplane, was introduced. In this text, the main specifications, design characteristics, and performance of KLA-100X are examined. In addition, the performance of the major components of the propulsion system, in this case the propulsion motor, inverter, and battery developed for application to KLA-100X are assessed, and the control system, additionally altered according to electric propulsion modification, is explained. Finally, the applicability of the developed major components to an electric propulsion airplane is confirmed by conducting ground and flight tests on the KLA-100X and presenting the results. In the future, the expansion of research aimed at improving the performance of current electric propulsion airplanes can be reviewed through the development of a dedicated platform for an electric propulsion airplane. [ABSTRACT FROM AUTHOR]

We study the group TA of rearrangements of the airplane limit space introduced by Belk and Forrest (2019). We prove that TA is generated by a copy of Thompson's group F and a copy of Thompson's group T, hence it is finitely generated. Then we study the commutator subgroup [TA; TA], proving that the abelianization of TA is isomorphic to Z and that [TA; TA] is simple, finitely generated and acts 2-transitively on the so-called components of the airplane limit space. Moreover, we show that TA is contained in T and contains a natural copy of the basilica rearrangement group TB studied by Belk and Forrest (2015). [ABSTRACT FROM AUTHOR]

The article focuses on the potential risks associated with implementing Single Pilot Operation (SPO) technology in commercial aircraft. It discusses the historical evolution of cockpit crew requirements, emphasizing the gradual reduction in crew members over time due to advancements in aviation technology. It highlights the current dual pilot flight (DPF) system, where one pilot assumes the role of pilot flying (PF) and the other as pilot monitoring (PM).

This paper investigated the discomfort caused by vertical whole-body vibration (WBV) over 20 minutes using data recorded at the front, middle, and rear seats of the passenger cabin in civil aviation during a cruising flight. Twenty-four subjects experienced each stimulus at 0.5 ms−2 r.m.s. and judged discomfort at various moments (i.e. 1/6, 5, 10, 15, and 20 min) using a category-ratio method. The difference in discomfort due to high-frequency vibration components vanished after 10 min. Based on Stevens' power law, a method is developed to estimate long-term vertical WBV discomfort by considering the static discomfort and an interaction coefficient between vibration and static discomfort as parameters. The proposed estimation method showed high accuracy with determination coefficients (R2) higher than 0.97 and good linearity with values of growth rates 0.95, 1, and 0.95 for the vertical WBV discomfort at the front, middle, and rear seat positions in the aircraft cabin. Practitioner summary: An estimation method for the discomfort caused by vertical WBV considering the duration and static sitting discomfort is developed. This method can provide accurate discomfort estimating for long-term vibration exposure, e.g. in civil aviation during a cruising flight, by introducing an 'interaction term' between static and dynamic discomfort. [ABSTRACT FROM AUTHOR]

BACKGROUND: Aircraft maintenance technicians (AMTs) have the most difficulty in terms of total workload criteria working in line maintenance. This is a very important problem for the Aircraft Maintenance Organization. A systematic and scientific approach is required for its solution. OBJECTIVE: This study proposes a new Multi-Criteria Decision Making (MCDM) based approach to evaluating the total workloads of AMTs to identify the most challenging AMT tasks in the aircraft maintenance organization. METHODS: A new hybrid MCDM approach is proposed by integrating the Decision-Making Trial and Evaluation Laboratory (DEMATEL) and Technique for Order Preference by Similarity (TOPSIS) methods to compare AMTs on the basis of workloads according to license categories. The hybrid method proposed in this study evaluates the total workload under three main titles: mental, physical, and environmental workload. RESULTS: Focusing on AMTs working in line maintenance of an aircraft maintenance organization, this study revealed that the most important workload criteria determined by the DEMATEL method are lower back strain, upper back strain, time pressure, and air temperature criteria. The results of the TOPSIS method showed that the license categories of AMTs are sorted according to the workloads as follows: A, B2, B1, and B1 + B2. The AMTs holding a "Category A" license have fewer workloads than the other categories. CONCLUSION: The findings of the study reveal some measures that might allow authorities to minimize the workload of AMTs. In addition, the study contributes to the literature because there are few studies that systematically analyze total workloads by using MCDM methods. [ABSTRACT FROM AUTHOR]

BACKGROUND: The recent growth of the aviation industry, which poses significant environmental challenges, has heightened the pressure on the sustainability of airports. Airport sustainability requires a holistic approach that encompasses economic, social, environmental, and operational aspects. In this regard, the United Nations' 17 Sustainable Development Goals (SDGs) Agenda provides a roadmap for the aviation industry. However, despite recognizing the importance of SDGs, aviation authorities and airports often fail to effectively integrate them into their activities and annual reports. OBJECTIVE: This study aims to evaluate the significance of SDGs for airports and select the airport that prioritizes SDGs the most using Multi-Criteria Decision Making (MCDM) methodologies. METHODS: This study introduces a novel approach that integrates Step-wise Weight Assessment Ratio Analysis (SWARA) and Weighted Aggregated Sum Product Assessment (WASPAS) methods, which are MCDM techniques, to enhance airport sustainability. The SWARA method is employed to evaluate and assign weights to the SDGs in the context of airports. RESULTS: SDG 8 holds the highest level of significance among the goals concerning airports, while SDG 14 falls outside the scope of airport sustainability aspects. Then, five international airports that have been designated as green airports by aviation authorities and assessment organizations are selected, and the optimal alternative is determined using the WASPAS method, considering the weights obtained through SWARA. CONCLUSION: Dallas/Fort Worth International Airport is the top choice due to its successful implementations and reports aligning with the SDGs. [ABSTRACT FROM AUTHOR]

Kafka's text has often been read as a reportage, but it doesn't fit the genre neatly. Rather than reporting what happens during the airshow, it dwells on the appearance of things, which are described meticulously, bearing witness to the author's literary ambition. However, reading the text as a hybrid, composite work that has been produced by an ambitious beginner, does not do it justice either. This is due to the fact that the description of things, especially of the airfield, comes with a reflection on perception. The airfield appears to have been artificially arranged, to induce a perceptive condition giving rise to self-forgetfulness. The later Kafka will regard self-forgetfulness as a precondition for his literary writing. As I will argue in this article, self-forgetfulness as a concept can already be detected in Die Aeroplane in Brescia. [ABSTRACT FROM AUTHOR]

In many parts of the world, emergency medical services (EMS) clinical care is traditionally delivered by different levels or types of EMS clinicians, such as emergency medical technicians and paramedics. In some areas, physicians are also included among the cadre of professionals administering EMS-based care. This is especially true in the interfacility transport (IFT) setting. Though there is significant overlap between the knowledge and skills necessary to safely and effectively provide care in the IFT and prehospital settings, the IFT care environment requires physicians to develop several additional competencies beyond those that are expected of traditional EMS clinicians. NAEMSP first published recommendations regarding what some of these competencies should be in 1983 and subsequently updated those recommendations in 2002. This document is an updated work, given the evolution of the field. [ABSTRACT FROM AUTHOR]

We propose an outdoor activity for game theory courses in which students are invited to fly self-made paper airplanes to earn points in three tests. The main goal of this outdoor classroom experiment is to help students learn by experiencing concepts of uncertainty in the domain of profit, specifically risk aversion. After the experiment, students are encouraged to reflect on decision making under uncertainty. We present a theoretical model to explain the decisions made by the participants, their optimal behavior and any deviations from it. Our activity aims to introduce the study of decision making under uncertainty through an experience. [ABSTRACT FROM AUTHOR]

Russia's aviation industry is particularly affected by sanctions and restrictions imposed by unfriendly nations in the current unstable political situation. That sets a high priority on import substitution and the replacement of imported aircraft components by Russian equivalents. The role of the import substitution strategy in Russia's economic policy is shown; and the corresponding goals and instruments are presented. The implementation of Russia's import substitution strategy in the aviation industry may be assessed by hierarchy analysis. The aircraft components that are of highest priority for manufacture in Russia are identified. [ABSTRACT FROM AUTHOR]

Reinforcement learning (RL) has seen an uptick in research interest in recent years, with many papers published in a plethora of different fields, topics and applications. A lot of that can be attributed to the recent advancements in machine learning (ML) and deep learning (DL) as a whole, the power of deep neural networks and the incorporation of them into reinforcement learning algorithms and techniques. This marriage of deep neural networks and traditional reinforcement learning methods has enabled reinforcement learning algorithms to achieve incredible results in use-cases that were previously deemed to be too complex. One of these highly complex scenarios is the realm of flight. In the last few years the number of papers published in this field has increased dramatically, but there is a fairly big divide between two major categories (quadcopters vs. fixed-wing aircraft). There is published work focusing on reinforcement learning using quadcopters, also known as drones, and there is published work focusing on fixed-wing aircraft, the more traditional aircraft, commonly referred to as airplanes. This paper focuses on the latter and will give an overview over the current state of reinforcement learning in the field of fixed-wing aviation. It will look into available toolkits usable for research as well as give an overview of different fields and tasks within reinforcement learning for fixed-wing aircraft control tasks. It contributes by providing detailed information about the methodologies used in each paper, while pointing out each paper’s contributions as well. A total of 48 papers on fixed-wing RL and airplane control are discussed. With the main focus lying on papers published post 2015, after the publication of Mnih et al.’s impactful deep RL paper.