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Purpose: Travel fatigue impacts cognitive and physiologic systems, but its association with elite soccer match performance is unclear. In this retrospective observational study, we aimed to explore the association between travel and match outcomes in elite North American soccer. Methods: Travel data and match outcomes (team points or goals scored and conceded) and physical performance outcomes from 26 elite professional soccer teams and their players were analyzed (148 matches [team-based data] and 1252 player matches from 297 players; age 22.7 [4.5] y). Player- and match-level correlations between performance measures and both acute and cumulated travel metrics were analyzed. Results: Cumulative travel metrics were positively associated with team (travel distance [r =.20; 95% CI,.03–.25], travel time [r =.20;.06–.37], and time away [r =.20;.06–.37]) and individual player (travel distance, [r =.14;.08–.19], travel time [r =.17–.23], and time away [r =.13;.07–.18]) high-intensity running. Cumulative time away was negatively associated with team points (r = −.14; −.28 to −.001) and positively associated with goals conceded (r =.14;.01–.27); no clear association between acute travel metrics and match outcomes or physical performance was observed. Conclusions: As travel cumulated, away teams and their players ran more but for less reward (team points), although the magnitude of these associations was small. These data are exploratory and do not imply a causal relationship; however, further research should consider cumulation of travel. [ABSTRACT FROM AUTHOR]

Purpose: The small air transport (SAT) domain is gaining increasing interest over the past decade, based on its perspective relevance in enabling efficient travel over a regional range, by exploiting small airports and fixed wing aircraft with up to 19 seats (EASA CS-23 category). To support its wider adoption, it is needed to enable single pilot operations. Design/methodology/approach: An integrated mission management system (IMMS) has been designed and implemented, able to automatically optimize the aircraft path by considering trajectory optimization needs. It takes into account both traffic scenario and weather actual and forecasted condition and is also able to select best destination airport, should pilot incapacitation occur during flight. As part of the IMMS, dedicated evolved tactical separation system (Evo-TSS) has been designed to provide elaboration of both surrounding and far located traffic and subsequent traffic clustering, to support the trajectory planning/re-planning by the IMMS. Findings: The Clean Sky 2-funded project COAST (Cost Optimized Avionics SysTem) successfully designed and validated through flight demonstrations relevant technologies enabling affordable cockpit and avionics and supporting single pilot operations for SAT vehicles. These technologies include the TSS in its baseline and evolved versions, included in the IMMS. Originality/value: This paper describes the TSS baseline version and the basic aspects of the Evo-TSS design. It is aimed to outline the implementation of the Evo-TSS dedicated software in Matlab/Simulink environment, the planned laboratory validation campaign and the results of the validation exercises in fast-time Matlab/Simulink environment, which were successfully concluded in 2023. [ABSTRACT FROM AUTHOR]

Mixed-methods study documented aircraft rescue and firefighting firefighters' positive attitudes and beliefs about gear cleaning; however, their actual gear-cleaning behaviors are infrequent. The following four major themes emerged: 1) chronic exposure to hazardous materials; 2) high-risk incident exposures; 3) inconsistent gear and decontamination practices; and 4) barriers to gear cleaning. Objectives: The aims of the study are to characterize Aircraft Rescue and Firefighting (ARFF) firefighters' perceptions of occupational exposure, health impacts, and decontamination practices and describe barriers to effective gear cleaning. Methods: A convergent parallel mixed methods design was employed, collecting and analyzing quantitative survey data (n = 81) and qualitative focus group data (n = 52) from ARFF firefighters at three Florida airports. Results: ARFF firefighters expressed concerns about chronic exposure to hazardous materials and perceived a heightened cancer risk. Despite acknowledging the importance of gear decontamination, they reported infrequent cleaning behaviors due to persistent contamination and barriers, including lack of a second set of gear. Firefighters' perceived norms emerged as the primary predictor of gear-cleaning behavior. Conclusions: Targeted interventions and policies are needed to address the unique challenges faced by ARFF firefighters in reducing occupational exposure risks and improving gear decontamination practices. [ABSTRACT FROM AUTHOR]

The desire to use additively manufactured (AM) parts to ensure the availability of military aircraft, and to build limited‐life unmanned aerial vehicles (drones), coupled with the United States Air Force (USAF) approach to the airworthiness certification of AM parts has focused attention on durability analysis/assessment, and hence on the growth of small cracks in AM parts. Previous studies have shown that laser powder fusion built (LPBF) Scalmalloy® has: i) A yield stress and an ultimate strength that are greater than that of AA2024‐T3 and comparable to that of AA7075‐T6; ii) A resistance to crack growth that is better than that of AA7075‐T6 and comparable to that of AA2024‐T3. However, since the ability to predict the durability of a part is essential for its airworthiness certification, the present paper illustrates how to perform a linear elastic fracture mechanics (LEFM)‐based durability assessment of Boeing Space, Intelligence and Weapon System (BSIWS) LPBF Scalmalloy®. The durability study includes specimens with both machined surfaces and surfaces left in the as‐built condition. As a result, it would appear that BISWS AM LPBF Scalmalloy® is an ideal candidate for building limited‐life AM replacement parts for fixed and rotary wing aircraft and drones. [ABSTRACT FROM AUTHOR]

Introduction: Evidence suggests that Extracorporeal Cardiopulmonary Resuscitation (ECPR) can improve survival rates for nontraumatic out-of-hospital cardiac arrest (OHCA). However, when ECPR is indicated over 50% of potential candidates are unable to qualify in the current hospital-based system due to geographic limitations. This study employs a Geographic Information System (GIS) model to estimate the number of ECPR eligible patients within the United States in the current hospital-based system, a prehospital ECPR ground-based system, and a prehospital ECPR Helicopter Emergency Medical Services (HEMS)-based system. Methods: We constructed a GIS model to estimate ground and helicopter transport times. Time-dependent rates of ECPR eligibility were derived from the Resuscitation Outcome Consortium (ROC) database, while the Cardiac Arrest Registry to Enhance Survival (CARES) registry determined the number of OHCA patients meeting ECPR criteria within designated transportation times. Emergency Medical Services (EMS) response time, ECPR candidacy determination time, and on-scene time were modeled based on data from the EROCA trial. The combined model was used to estimate the total ECPR eligibility in each system. Results: The CARES registry recorded 736,066 OHCA patients from 2013 to 2021. After applying clinical criteria, 24,661 (3.4%) ECPR-indicated OHCA were identified. When considering overall ECPR eligibility within 45 min from OHCA to initiation, only 11.76% of OHCA where ECPR was indicated were eligible in the current hospital-based system. The prehospital ECPR HEMS-based system exhibited a four-fold increase in ECPR eligibility (49.3%), while the prehospital ground-based system showed a more than two-fold increase (28.4%). Conclusions: The study demonstrates a two-fold increase in ECPR eligibility for a prehospital ECPR ground-based system and a four-fold increase for a prehospital ECPR HEMS-based system compared to the current hospital-based ECPR system. This novel GIS model can inform future ECPR implementation strategies, optimizing systems of care. [ABSTRACT FROM AUTHOR]

The aim of this study was to analyze the associations between healthcare services utilization and flight-related characteristics of asylum seekers and refugees in Germany. The 2020 wave of the German Socio-Economic Panel's Survey of Refugees was used to compile a sample of asylum seekers and refugees (n  = 3134). Healthcare services utilization was measured using the self-reported number of visits to primary care physicians and hospitalization. Only the feeling of being welcome and worries about not being able to stay in Germany were identified as potential flight-related determinants of healthcare services utilization. [ABSTRACT FROM AUTHOR]

Airship R.38 was on its fourth trial flight before being fully handed over to the US Navy as ZR-2 when it crashed into the Humber just off the waterfront of Hull in August 1921. This project aimed to recognise and elaborate the significance of the R.38/ZR-2 in time for the centenary of the crash in August 2021. The significance of R.38/ZR-2 is framed by its build, use and loss: the crash embodies the history of airship development to that time, but also encapsulates the future of airships and aspects of aeroplane development also. The continued curation of stories and items showed that the profound impact of the crash still clearly resonates down the generations. The project also brought a fresh focus to the crash site of R.38/ZR-2 as a heritage asset: bathymetric data indicate that material from the airship could still be present within the bed of the Humber. [ABSTRACT FROM AUTHOR]

The article describes the results of an analysis of the states and operating conditions the ASz-62 IR-16E engine. The tests were carried out on an AN-2 aeroplane with the ASz-62IR-16E engine. The purpose of this study was to determine the contribution of static and dynamic engine operating states during flight. The engine operating parameters were recorded at a frequency of 16 Hz for over 7 hours of flight. The engine operating points defined by two parameters, i.e. engine speed and intake manifold pressure were analysed, and the mean values, standard deviations and histograms of the distributions of these parameters were determined. The distribution of the occurrence of various operating states, i.e. steady states and transients was also analysed for low, medium and high load, and for IDLE and WOT. The article describes the contribution of the individual engine operating states to the total flight time. The results obtained for the aircraft engine are compared with those obtained for automotive vehicle engines and described in the paper. The study shows that most of the operating time of the ASz-62IR-16E aircraft engine was in steady-state conditions - about 90% of this time, whereas steady-state operating conditions for the automotive engine account for about 80% of the driving time. For the aircraft engine, more than 65% of operating time is heavy load. Small and medium loads account for 10% and 25% of operating time, respectively. In the case of the car engine, only about 5% of operating time is heavy load, while the major part of operating time is under light (about 40%) and medium (about 55%) load. Under idling conditions, the aero-engine's operating time was about 6.2%, i.e. about twice shorter than that of the car engine (about 13.2%). Under WOT conditions, the aircraft engine had an operating time of 1.3%, while for the car engine this condition was extremely rare - about 0.1%. It was also shown that the ASz-62IR-16E aircraft engine of the AN-2 aircraft in real flight conditions has a specific, most frequently used operating point lying in the range of the values: n = 1800 ÷ 1900 RPM and MAP = 0.8 ÷ 0.95 Bar. [ABSTRACT FROM AUTHOR]

Featured Application: The presented work can support the design of more efficient airplanes, ships, and other structures utilizing composite materials. This paper presents a numerical investigation of delaminated composite plates using a 3D degenerated plate element, with a focus on geometric nonlinearity. An 8-noded degenerated element is used to model the composite plate, ensuring higher accuracy and computational efficiency. Delamination is modeled using Heaviside step functions, providing a clear representation of discontinuities. The Green–Lagrangian formulation is employed to incorporate geometric nonlinearity and to evaluate its effects on the deflection behavior of delaminated plates under load. The developed model is validated against existing literature, demonstrating its reliability. Subsequently, a comprehensive parametric study is conducted to evaluate the influence of various factors including lamina sequences, boundary conditions, load intensities, and the size and location of the delamination (considered at the center of the laminate). A uniformly distributed pressure load is applied across the entire plate to simulate realistic loading conditions. Additionally, the effects of multiple delaminations through the thickness of the laminate are explored, with key observations on their impact reported. The findings provide valuable insights into the structural performance of delaminated composite plates under nonlinear conditions. [ABSTRACT FROM AUTHOR]

Background: Excessive heat stress led to more than 400 deaths in the United States from 2011 to 2021. Common methods for heat injury prevention revolve around measurements of the environment and fail to account for the unique individual response to stressors. Methods: An observational approach was utilized with nine helicopter-based emergency medical services personnel during emergency flights to compare core temperature readings obtained from an ingestible temperature monitoring pill and the estimated core temperature reading of the Slate Safety Band V2 wearable device. Comparison of data was conducted within Microsoft Excel programming to determine the mean square error (MSE), root mean square error (RMSE), mean absolute error (MAE), mean biased error (MBE), and Bland–Altman plot development. Findings: A significant bias (t = 17.58, p <.001) toward the Slate Safety device reading higher with an average difference of −0.48°C (−0.86°F) was found, meaning the average temperature reading is 0.48°C (−0.86°F) higher with the Slate Safety device. A significant correlation of.26 (p <.001) was noted between the ingestible pill and the wearable device with a 95% confidence interval of 0.23 to 0.29. Aggregate core temperature data demonstrated an MSE of 0.43, an RMSE of 0.65, an MAE of 0.54, and an MBE of −0.48. Conclusions/Application to Practice: The ability to monitor the physiological parameters of a worker remotely adds safety tools relative to the risks of heat stress. The slightly higher reading associated with the Slate Safety wearable device provides an added safety margin to protect our workers. [ABSTRACT FROM AUTHOR]

How do individuals who engage in high-risk work deal with the existential threats that are part and parcel of their daily activities? Based on a qualitative study of fighter pilots, we find that experiences and responses to existential threats are shaped by three intersubjective processes, that is, socially constructed and accepted patterns of interactions by which individuals come to view existential threats as one of several challenges of their work, something that is common yet unremarkable. These processes draw from and impinge upon cherished social identities to inculcate in individuals: (1) a preoccupation with performance as a precondition for continued membership, thereby crowding out death anxiety; (2) a willingness to withstand no-holds barred collective scrutiny, thereby keeping their egos under check, and enhancing learning and safety; and (3) a view of death as a commonplace and therefore unremarkable facet of their activities. The contribution of our study is to illuminate the intersubjective processes implicated in the development of social identities that enable individuals in high-risk work to function effectively despite the existential threats they face. [ABSTRACT FROM AUTHOR]

In this paper, we present a method to optimize the attainable moment set (AMS) to increase the control authority for electrical vertical take-off and landing vehicles (eVTOLs). As opposed to 3D AMSs for conventional airplanes, the hover control of eVTOLs requires vertical thrust produced by the powered lift system in addition to three moments. The limits of the moments and vertical thrust are coupled due to input saturation, and, as a result, the concept of the traditional AMS is extended to the 4D generalized moment set to account for this coupling effect. Given a required moment set (RMS) derived from system requirements, the optimization is formulated as a 4D convex polytope coverage problem, i.e., the AMS coverage over the RMS, such that the system's available control authority is maximized to fulfill the prescribed requirements. The optimization accounts for not only nominal flight, but also for one critical engine inoperative situation. To test the method, it is applied to an eVTOL with eight rotors to optimize for the rotors' orientation with respect to the body axis. The results indicate highly improved coverage of the RMS for both failure-free and one-engine-inoperative situations. Closed-loop simulation tests are performed for both optimal and non-optimal configurations to further validate the results. [ABSTRACT FROM AUTHOR]

The English-language Wikipedia article on the airplane states that Clément Ader 'attempted to fly', whereas 'the Wright brothers invented and flew the first airplane'. The French-language Wikipedia, in turn, points to France's pioneering role in aviation – which contrasts with the emphasis placed on Portuguese-speaking aviators in the Portuguese-language entry. Paradoxically, in each language, the airplane has a different inventor. Through online ethnography, this article explores the multilingual landscape of Wikipedia, looking not only at languages, but also at language varieties, and unpacking the intricate connections between language, country, and nationality in grassroots knowledge production online. Advocating for an attention to how multilingualism online involves more than 'Google Translate-ing' content, this study challenges conventional views of user-generated content platforms as unproblematically global and multilingual. • Wikipedia serves as a productive entry point for exploring language use and knowledge co-production online. • Ethnographic and archival research allow for the analysis of multilingualism in user-generated content platforms. • Grassroots knowledge production intricately intertwines – and occasionally conflates – language, country, and nationality. • The use of language varieties online challenges the notion of digital platforms as unproblematically global and multilingual. [ABSTRACT FROM AUTHOR]

Melanoma is the most serious form of skin cancer. While classical risk factors are well described, the literature debates whether specific subgroups in the community have an increased risk of developing the condition. These include those who work as aircrew or in the defence forces. While occupational skin cancer is increasingly recognised, it is likely still under-reported. This narrative literature review explores the published literature on melanoma, focusing on aircrew and Defence Force members, as results have potential implications for these workers' selection, protection and surveillance. Many but not all studies show that aircrew and Defence Force members may have an increased risk of melanoma, but gaps in the literature are highlighted. In particular, much of the data reviewed is from several years ago and primarily relates to Northern Hemisphere settings. The importance of exploring the current context in the Australian setting to inform future practice is outlined. [ABSTRACT FROM AUTHOR]

In this paper, we focus on the multi-target tracking (MOT) task in satellite videos. To achieve efficient and accurate tracking, we propose a transformer-distillation-based end-to-end joint detection and tracking (JDT) method. Specifically, (1) considering that targets in satellite videos usually have small scales and are shot from a bird's-eye view, we propose a pixel-wise transformer-based feature distillation module through which useful object representations are learned via pixel-wise distillation using a strong teacher detection network; (2) targets in satellite videos, such as airplanes, ships, and vehicles, usually have similar appearances, so we propose a temperature-controllable key feature learning objective function, and by highlighting the learning of similar features during distilling, the tracking accuracy for such objects can be further improved; (3) we propose a method that is based on an end-to-end network but simultaneously learns from a highly precise teacher network and tracking head during training so that the tracking accuracy of the end-to-end network can be improved via distillation without compromising efficiency. The experimental results on three recently released publicly available datasets demonstrated the superior performance of the proposed method for satellite videos. The proposed method achieved over 90% overall tracking performance on the AIR-MOT dataset. [ABSTRACT FROM AUTHOR]

The civil aviation transportation has sustained rapid growth, which poses significant challenges in ensuring airport safety and efficiency of use. Persons and vehicles are tiny targets in airport surveillance. Existing detection methods are difficult to detect accurately. Enhancing small target detection by only the method of adding enhancement modules inevitably leads to increased network parameters. To address the above issues, this article proposes a lightweight airport surveillance detection based on YOLOv7 named LAS-YOLO. Firstly, we design the lightweight basic module, which significantly reduces network parameters while retaining certain local features. Secondly, we replace the SPPCSPC module with the spatial pyramid pooling-fast module with fewer parameters, further reducing the quantity of network parameters. Finally, the attention mechanism and small object detection layer are introduced to enhance small object detection accuracy. The efficient channel attention module is selected among three attention methods by experiments. We simulate the application process of object detection methods in airport surveillance, training on high-performance computers and testing on lower-performance computer. This article verifies the performance of the proposed method on the public ASS dataset consisting of the airport surface surveillance dataset (ASS1) and panoramic surveillance dataset (ASS2). The experiment shows that the parameters of LAS-YOLO are 12.5 M, which is 34.2 % of the original model. The mean average precision is 89.8 % on the ASS1. This proposed method enhances the average precision for airplane and vehicle detection by 14.5 % and 22.7 % compared to YOLOv7 on the ASS2. In order to reflect the robustness of the model in airport surveillance, we conduct another experiment using airplane data from the ROSD. The experiment demonstrates the superiority of the proposed method over other models in airport surveillance. Code is available at https://zenodo.org/records/10969930. [ABSTRACT FROM AUTHOR]

Aeroplane crashing is a major concern for aviation safety. This article aim is to control aeroplane crashing through aviation infrastructure by using Multi-Agent Technology (MAT). For this 6 variables of aeroplane crashing, 20 variables of aviation infrastructure and 34 variables of MAT are extracted from the literatureto develop the information framework for the study. Fuzzy Multi-Criteria Decision-Making (FMCDM) technique is utilised to analyse prioritise, ranking, and identify interrelationship among them. The human error is evolved most significant factor of aeroplane crashing followed by others. For aviation infrastructure, runway is found to be the most important variable in global ranking. Whereas, in MAT pilot assistance agent is most prioritised variable in overall ranking. The proposed framework can assist the aviation industry to understand the behaviour of aviation infrastructure and MAT variables to control aeroplane crashing. The results of this study can be utilised by aviation professionals in improving aviation safety. [ABSTRACT FROM AUTHOR]

Human factors during aircraft maintenance have a significant impact on aviation safety. Human factors analysis, therefore, is an essential aspect in aviation. The researchers have analyzed human factors in detail. yet, the existing studies are mostly reactive in nature. In the present study, incidents during aircraft maintenance related to human factors were investigated using the HFACS-ME classification system. Critical human factors and their latent conditions were identified and mapped. Identification of active and latent human factors enables proactive mitigation of weaknesses in the system thus ensuring maintenance safety. Interventions to mitigate human factors and improve the maintenance setup at the shop floor, management, and organization levels were formulated. The proposed model validated that past incidents could be effectively utilized as predictors to identify and mitigate active and latent human factors during aircraft maintenance by implementing proactive interventions. KEY POINTS: A proactive approach to identify, prioritize, and mitigate active and latent human factors in maintenance tasks in aviation. Active and latent human factors in aircraft maintenance incidents were analyzed and mapped using HFACS-ME. Dependency of factors was established. interventions at all levels in the organization were proposed to mitigate human factors. The proposed model could be effectively utilized to mitigate human factors by implementing proactive interventions during aircraft maintenance. [ABSTRACT FROM AUTHOR]

Background: Interest in post-coronavirus disease 2019 (COVID-19) syndrome following COVID-19 infection has been increasing. Maintaining quality of life (QoL) is vital for airline crews because they work in a special environment, where they are responsible for the passengers' safety. This study aims to closely investigate factors affecting the QoL of airline crews, including post-COVID-19 syndrome. Methods : This study was designed as a cross-sectional survey, comprising 167 crews. Findings : Age-specific significant differences were observed in social, overall, and total QoL scores. The physical domain QoL was significantly higher in the cockpit crews than that in the cabin crews. Significant differences were found in psychological and overall QoL depending on years of continuous service. Social domain and environmental QoL were lower in those who had no symptoms after being diagnosed with COVID-19 than in those who were symptomatic. Among the participants, 4.2% had post-COVID-19 syndrome, indicating significant differences in the physical domain, depending on whether they exhibit post-COVID-19 syndrome. Conclusion : It is urgent to develop measures to increase the QoL of airline crews, investigate post-COVID-19 syndrome before returning to work, and develop strategies to manage it. Application to practice : The QoL among airline crews differed not only by the demographic characteristics of the participants but also by the presence of symptoms during COVID-19 diagnosis and post-COVID-19 syndrome. Higher QoL among airline crews is associated with the safety of both airline crews and passengers. Therefore, it is necessary to establish a systematic management protocol for airline crews returning to work after following COVID-19 infection. [ABSTRACT FROM AUTHOR]

Helicopter EMS (HEMS) is a well-established mode of rapid transportation for patients with need for time-sensitive interventions, especially in patients with significant traumatic injuries. Traditionally in the setting of trauma, HEMS is often considered appropriate when used for patients with "severe" injury as defined by Injury Severity Score (ISS) >15. This may be overly conservative, and patients with a lower ISS may benefit from HEMS-associated speed or care quality. Our objective was to perform a meta-analysis of trauma HEMS transports to evaluate for possible mortality benefit in injured cases defined by an ISS score >8, lower than the customary ISS cutoff of >15. A broad search of the literature was performed including PubMed, EMBASE, SCOPUS, Cochrane Central Register of Controlled Trials, and Google Scholar from the years 1970 to 2022. The gray literature and reference lists of included publications were also examined. We included studies with the outcome of mortality in HEMS vs control in trauma transports from scene of injury for patients (adult or pediatric) with ISS > 8. Nine eligible studies were used in the final analysis: six in the primary analysis and three in sensitivity analysis due to patient overlap. All studies reported statistically significant survival benefit in HEMS compared to control group. The minimum survival odds ratio (OR) benefit observed was OR 1.15 (95% CI 1.06–1.25) and maximum was OR 2.04 (95% CI 1.18–3.57). Risk of bias tool (ROBINS-I) application yielded moderate to low risk of bias, mainly due to the observational nature of the studies included. There was a statistically significant survival benefit in patients with ISS > 8 when HEMS was used over traditional ground ambulance transportation, although novel and more inclusive trauma triage criteria may be more appropriate in the future to guide HEMS utilization decision-making. Restricting HEMS to trauma patients with ISS >15 likely misses survival benefit that could be afforded to the subset of trauma patients with serious injury. [ABSTRACT FROM AUTHOR]

Unmanned aerial vehicles (UAVs) have the characteristics of relatively small size, low manufacturing and life cycle costs, no expensive training and maintenance costs, long body service life, simple maintenance and repair, and are widely used in various aspects of society. This article designs a micro four axis aircraft based on ARM 32-bit chip STM32F407VGT6, which uses HMC5883 attitude sensor to control the attitude. Based on the design of traditional fixed wing aircraft, further optimization and improvement are carried out according to the working principles and characteristics of the four axis aircraft. At the same time, the dynamic model of the aircraft are designed, and data is transmitted and converted to the STM32F407VGT6 flight control processor through the HMC5883 attitude sensor and BMX055 pressure sensor to obtain accurate data analysis and calculation in order to achieve stable flight of this four axis aircraft. Practice has shown that after flight testing of this four axis aircraft, the unmanned aerial vehicle designed in this paper has achieved good expected results, proving that this design has a certain degree of scientific and practical significance. [ABSTRACT FROM AUTHOR]

Paediatric supraventricular tachycardia (SVT) is a common arrhythmia of great clinical significance. If not treated promptly, it can cause heart failure and cardiogenic shock. Depending on the patient's condition, SVT treatment involves vagal manoeuvres, pharmacological, or direct current cardioversion. The goal of acute SVT management is to immediately convert SVT to a normal sinus rhythm (NSR) and prevent its recurrence. Adenosine is recommended as the first-line treatment for stable SVT by the European Resuscitation Council (ERC) and American Heart Association (AHA) guidelines, when vagal manoeuvres have proven ineffective. The ERC and AHA guidelines recommend the intravenous route of administration. The intraosseous (IO) administration technique is also possible, but still relatively unknown. The aim of this paper is to describe a 3.5-year-old child with SVT that was converted to NSR following IO administration of adenosine. Successful conversion was achieved after the second attempt with the adenosine dose. In the described case, there was no recurrence of SVT. [ABSTRACT FROM AUTHOR]

Point of Care Ultrasound (POCUS) has seen increasing use in the prehospital environment over the last decade, primarily with the extended focused assessment with sonography in trauma (eFAST) exam. Previous studies have shown prehospital eFAST exams are feasible in the helicopter transport environment but have yet to demonstrate effects on clinical care. This retrospective case series identified 655 patients with blunt thoraco-abdominal trauma or concern for pneumothorax due to penetrating injury transported by a single helicopter EMS (HEMS) program over a two-year period after introducing POCUS. Of those patients, 258 received prehospital ultrasound which was reported to change clinical care in seven cases (2.7%, 95%-CI [1.1–5.5]). This was primarily through preventing unnecessary needle thoracostomy and initiating blood transfusion for treatment of hemorrhagic shock in cases where the degree of shock was unclear due to inconsistent vital signs. This study highlights the improvements in clinical care that may result from the introduction of eFAST exams in the prehospital environment. [ABSTRACT FROM AUTHOR]

Introduction: We retrospectively analyzed convulsive patient outcomes transported by a physician-staffed Helicopter Emergency Medical Service (doctor helicopter [DH]) using the keyword-triggered dispatch with data from the Japan DH Registry System (JDRS). Upon receiving an emergency call containing critical keywords, such as an ongoing convulsion at the firefighting central command room, immediate dispatch of the DH is requested, in addition to dispatching an ambulance. The keyword-triggered dispatch relied on data obtained from the JDRS. Methods: Details from the JDRS database included patient age, sex, cardiac arrest presence upon DH contact, vital signs, DH dispatch timing (keyword-triggered dispatch/emergency medical technician [EMT]-triggered dispatch), medical intervention details, and 1-month outcomes (cerebral performance category [CPC]; CPC1, 2: Good; CPC 3–5: Poor). Subjects were divided into keyword (keyword-triggered dispatch) and control (EMT-triggered dispatch) groups for comparison. Results: Of 1201 patients, all evacuated from the scene, 617 were in the keyword group, and 584 in the control group. No significant differences existed between groups for cardiac arrest, respiratory and heart rates, CPC, or mortality. The keyword group had lower average age, systolic blood pressure, and medical intervention ratio but a higher median Glasgow Coma Scale and good outcome ratio. Conclusion: This first report on the keyword-triggered dispatch as a prognostic factor for convulsive patients evacuated by DH using the JDRS. [ABSTRACT FROM AUTHOR]

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Double-propeller compound high-speed unmanned helicopter, which is currently one of the hottest research topics in high-speed aircraft, has the advantages of both helicopter and fixed wing aircraft. In this paper, the flight-dynamics related analysis and manipulation strategy research of the double-propeller compound high-speed unmanned helicopter are carried out. The aerodynamic interference model of rotor to wing is constructed by using the interference factor, and the fuselage model is based on the wind tunnel test data. Then, the nonlinear flight dynamics model of double-propeller compound high-speed unmanned helicopter is presented. In view of the problem of control redundancy, a manipulation strategy is proposed, which allocates the control channel with the weight coefficient, and controls the forward flight speed by the longitudinal channel of the mean propeller pitch. On this basis, the smooth transition of each rod between the three modes is realized, which verifies the rationality of the control strategy. [ABSTRACT FROM AUTHOR]

A "high mobility scenario" involves individuals moving swiftly, such as on high-speed trains, airplanes, or congested urban automobiles. Channel estimation and data detection must be addressed as 6G wireless communication becomes more common and high-speed connectivity is needed for greater mobility. The existing works address high pilot overhead, inaccurate modeling, receiver complexity, low spatial resolution, and low signal-to-noise ratio. We propose a comprehensive solution using Zeros added Superimposed Sequence Pilot to enable reliable communication with low complexity equalization in MIMO-OTFS to overcome these issues. Sequentially transmitting pilot signals reduces pilot overhead, spectrum efficiency, and inter-user interference. Better receiver equalization. The equalizer minimizes inter-symbol, frequency domain, and DD domain inter-user interference for precise data identification. DOMP removes the drawbacks of the conventional OMP approach and produces more accurate channel estimates. Superimposed pilot signals reduce user and symbol interference. Arranging data, pilot, and guard symbols in the (DD) Domain reduces pilot overhead and interference. SNR, NMSE, QoS, BER, throughput, and latency are utilized to evaluate the proposed technique. [ABSTRACT FROM AUTHOR]

This article examines how emotion is built into the television coverage of airplane disasters in the form of narratives, language and sound. It shows that the reporting embeds emotional content within a set of stylistic features. These features include the outsourcing of emotions, detailed descriptions, juxtapositions, contrasts, conditional perfect as well as technical features such as emotional language and sounds. Based on the findings, we argue that there are layers of complexity in emotional storytelling, which build on a variety of narrative, linguistic and technical features that journalists can draw on. Although we link these to the coverage of airplane disasters, our findings have broader implications for the study of emotionality in journalism studies and disaster communication. As such, these features show the distinctive ways in which emotions may be used in other forms of media coverage, establishing a broad repertoire of emotional practices in journalism. [ABSTRACT FROM AUTHOR]

Using VR in the airplane cabin is appealing, primarily because of the enhanced entertainment value, increased privacy, and improved recreational opportunities provided by higher levels of immersion. However, VR applications in aircrafts contain the risk of passengers developing cybersickness. The particular environment of a moving aircraft in interaction with visual representation of movements in VR could lead to severe cybersickness, especially during turbulence. We had 129 participants experience VR in a full flight simulator with different content (static or dynamic VR clips) and during varying phases of flight including turbulence. The employed simulator is equipped with a cabin module, creating an economically valid environment. VR induced significant but mild symptoms of cybersickness. Nausea and dizziness symptoms were most severe during turbulence and especially with dynamic VR content being presented. More anxious participants tended to report more symptoms. In addition, there was an association with video game use and attitudes toward new technologies. While mild content and short exposure times only led to fairly low expressions of cybersickness, a long-term use of VR under turbulence could possibly become a concern. Airlines should especially address passengers’ negative attitudes toward new technologies, and VR in particular, to reduce fears and the risk of low tolerability. [ABSTRACT FROM AUTHOR]

Safety in General Aviation has been a continuous concern. About 12% of all airplane accidents in General Aviation involve nose-overs and nose-down events. A total of 134 accidents reported by the National Transportation Safety Board that include nose-overs and nose-downs were analyzed for their main causes. It was found that 35% of the defining events involved a loss of control on the ground while 58% of the total dataset involved tailwheel-type aircraft. A relatively high proportion of aircraft built before 1950 were found, which are also aircraft that have tailwheel-type landing gear, and thereby a higher propensity for ground loops and nose-overs. It is shown that the high accident rate in General Aviation, especially for accidents that did not result in a fatality, was, to an important extent, explained by tailwheel and older aircraft in the US General Aviation airplane fleet struggling with controlling the aircraft on the ground. Attention to this group of aircraft in future studies may help to more effectively address the relatively high accident rates in General Aviation. [ABSTRACT FROM AUTHOR]

Summary: We investigate the transmission of aerosol particles in an airplane cabin with a joint approach using experiments and simulation. Experiments were conducted in a realistic aircraft cabin with heated dummies acting as passengers. A Sheffield head with an aerosol generator was used to emulate an infected passenger and particle numbers were measured at different locations throughout the cabin to quantify the exposure of other passengers. The same setting was simulated with a computational fluid dynamics model consisting of a Lagrange continuous phase for capturing the air flow, coupled with a Lagrange suspended discrete phase to represent the aerosols. Virtual measurements were derived from the simulation and compared with the experiments. Our main results are: the experimental setup provides good measurements well suited for model validation, the simulation does correctly reproduce the fundamental mechanisms of aerosol dispersion and simulations can help to improve the understanding of aerosol transmission for example by visualizing particle distributions. Furthermore, with findings from the simulation it was possible to crucially improve the experimental setup, proving that feedback between the numerical and the hardware world is indeed beneficial. [ABSTRACT FROM AUTHOR]

Reactions to the Wright brothers' achievement of the first sustained, controlled powered flight in December 1903 ranged from complete indifference to voluble celebration and evolved into convictions that ranged from a belief that war would be rendered impossible to confident predictions of invasion and widespread destruction. The policies and perceptions of institutions, governments and individuals were subject to constant revision and often abrupt reversal. When war came, the aeroplane, which began as an instrument of reconnaissance, rapidly became one more hazard among many for those at the front and a further point of division between combatants and civilians, for whom airships and air raids tended to loom larger. The first dynamic phase in the story of the aeroplane overlaps with the major early modernist period. This essay seeks to map, within that wider context, the experiences and responses of Ford Madox Ford. He began, like many others, with images of beauty and the natural world in that early stage when a functioning range of descriptive or comparative terms had yet to emerge. He encountered them next in the theatre of war during his service in France. His ambivalence towards aeroplanes was both similar to and different from his earlier responses to trains, cars and telephones. Their relative rarity, as well as their both physical and metaphorical distance, and Ford's own apparent immunity to the glamour and dynamism of aviation enabled him to view them retrospectively and employ them in anecdote, autobiography and fiction as both threat and saviour. [ABSTRACT FROM AUTHOR]

Aerotoxic Syndrome may develop as a result of chronic, low-level exposure to organophosphates (OPs) and volatile organic compounds in the airplane cabin air, caused by engine oil leaking past wet seals. Additionally, acute high-level exposures, so-called "fume events," may occur. However, air quality monitoring studies concluded that levels of inhaled chemicals might be too low to cause adverse effects. The presence of aerosols of nanoparticles (NPs) in bleed air has often been described. The specific hypothesis is a relation between NPs acting as a vector for toxic compounds in the etiology of the Aerotoxic Syndrome. These NPs function as carriers for toxic engine oil compounds leaking into the cabin air. Inhaled by aircrew NPs carrying soluble and insoluble components deposit in the alveolar region, where they are absorbed into the bloodstream. Subsequently, they may cross the blood-brain barrier and release their toxic compounds in the central nervous system. Olfactory absorption is another route for NPs with access to the brain. To study the hypothesis, all published in-flight measurement studies (2003–2023) of airborne volatile (and low-volatile) organic pollutants in cabin air were reviewed, including NPs (10–100 nm). Twelve studies providing data for a total of 387 flights in 16 different large-passenger jet aircraft types were selected. Maximum particle number concentrations (PNC) varied from 104 to 2.8 × 106 #/cm3 and maximum mass concentrations from 9 to 29 μg/m3. NP-peaks occurred after full-power take-off, in tailwind condition, after auxiliary power unit (APU) bleed air introduction, and after air conditioning pack failure. Chemical characterization of the NPs showed aliphatic hydrocarbons, black carbon, and metallic core particles. An aerosol mass-spectrometry pattern was consistent with aircraft engine oil. It is concluded that chronic exposure of aircrew to NP-aerosols, carrying oil derivatives, maybe a significant feature in the etiology of Aerotoxic Syndrome. Mobile NP measuring equipment should be made available in the cockpit for long-term monitoring of bleed air. Consequently, risk assessment of bleed air should include monitoring and analysis of NPs, studied in a prospective cohort design. [ABSTRACT FROM AUTHOR]

This essay explores airplane manufacturing in twentieth-century Seattle to trace the correspondence between major developmental moments in the city's history and broader transitional moments in American empire. In doing so, it argues that Seattle is best understood as an imperial city characterized by four ongoing features: extensive connections beyond the city's nominal borders; sustained alliance between private commercial interests and the state that made such connections possible; a built environment of technological infrastructure made to serve that alliance; and labor forces, segmented by race, subject to the evolving needs of empire. [ABSTRACT FROM AUTHOR]