Civil Aviation Research Articles

Empirical Study on the Promotion of Industrial Structure Upgrading by Aviation Economy: A Case Study of National Airport Economic Zones

With the rapid growth of civil aviation and economic integration, aviation economic zones centered on large airports have a significant economic impact on surrounding areas. These zones foster the concentration of technology, capital, and labor, leading to the emergence of new regional economic models. This research, based on data from 17 national-level aviation economic demonstration zones, develops an evaluation index system for aviation economic development and constructs a regression model incorporating industrial structure coefficients. It empirically analyzes the relationship between the development of aviation economy and the upgrading of industrial structure in cities with national-level aviation economic zones, revealing the aviation economy’s role in promoting industrial structure upgrading and providing policy recommendations for regional economic innovation.

A Tale of an Airlines Company: Towards A Model of Strategy Formulation Through the Lenses of Sustainable Development Goal

Objective: The purpose of this paper is to explore a few insights into the national airlines of Bangladesh (called Biman) and how they can achieve the Sustainable Development Goals (SDG). Further, the paper evaluates the available strategies using IEF, EFE, SWOT, IE & QSPM matrices/techniques as proposed by David & David (2017). Theoretical Framework: IFE (Internal Factor Evaluation) & EFE (External Factor Evaluation (e.g. input stage), SWOT (Strength, Weakness, Opportunity, and Threats) & IE (Internal and External) matrix (e.g. matching stage), and finally QSPM (Quantitative Strategic Planning Matrix) (e.g. decision-making stage) are used for strategy formulation. Method: This study applies a mixed-method approach. Face-to-face interviews with the passengers of London-Dhaka-London are conducted, and additionally, the content analysis of relevant newspapers and journal articles is carried out. Results and Discussion: QSPM finds, that market development (priority-1), offensive strategy (priority-2), and product development (priority-3) are the appropriate strategies for the airline.It would be not easy to generalize the results as the study is based on one public airline company in a particular country (Bangladesh). Research Implications: This study has both theoretical and practical implications. The study demonstrates how to formulate plans using a quantitative method. The result of this study might be beneficial to Bangladesh's Civil Aviation Authority. The recommendations of this study may help generate profits in Biman. Originality/Value: This study contributes to the strategy literature. Strategy development processes for any business, including aviation, may be eye-opening.

The significance of airport certification in the recovery process security of civil aviation of Ukraine

The main goal of this study is the need to solve the problems of safe and effective development of airport infrastructure, since the implementation of effective international and European standards, transformation and modernization of airport infrastructure is one of the directions of Ukraine’s work in the process of implementing international and European standards, as well as in the development of the UN Sustainable Development Goals. The authors used the method of analysis of the global reporting format to find out the requirements of the acts of international and European civil aviation organizations in the conditions of restoring the safety of civil aviation of Ukraine, compliance with standards and recommended practices regarding the certification of airport activities. Paths are defined recovery infrastructure of Ukrainian airports after the cessation of Russian military aggression, which caused horrible destruction, in particular, in the airport industry, the requirements for accreditation of airports, existing facilities on the territory of the airport were analyzed. The scientific novelty of the research lies in the fact that the authors carried out a thorough analysis of the requirements of international and European civil aviation organizations for airport activity, directions for certification of airports after the end of the war, which would contribute to the economic development of the state. The experience of Ukraine’s cooperation with international and European civil aviation organizations in the field of airport certification should contribute to the restoration of state’s capabilities for the safety of civil aviation flights.

Abstract 4136016: Higher aircraft noise exposure associates with worse heart structure and function

Introduction: Aircraft noise is a concern for communities living near airports, but its impact on heart structure and function is unknown. Methods: Night-time (L night ) and weighted 24-hour day (L den ) aircraft noise levels were provided by the UK Civil Aviation Authority for 2011 (Fig.1). Health data came from UK Biobank (UKB) participants living near four UK major airports (Heathrow, Gatwick, Manchester, and Birmingham) who had cardiovascular magnetic resonance (CMR) imaging starting from 2014 and self-reported no hearing difficulties. Generalized linear models investigated the associations between aircraft noise exposure and CMR metrics (derived using a validated convolutional neural network to ensure consistent image segmentations), after adjustment for demographics, socio-economic, lifestyle, and environmental covariates. Mediation by cardiovascular (CV) risk factors was also explored. Downstream associations between CMR metrics and major adverse cardiac events (MACE) were tested in a separate prospective UKB subcohort (n=26,658) to understand the potential clinical impact of noise-associated heart remodeling. Results: Of 3,635 UKB participants included, 3% experienced higher aircraft noise L night (≥45decibels) and 8% higher L den (≥50decibels). Participants exposed to higher L night had 7% [95% confidence interval: 4–10%] higher left ventricular (LV) mass and 4% [2–5%] thicker LV walls with a normal septal:lateral wall thickness ratio (Fig.2 A1). This LV concentric remodeling is relevant since 7% higher LV mass associates with 32% higher odds of MACE. They also had worse LV myocardial dynamics (Fig.2 A2) (e.g., 8% [4–12%] lower global circumferential strain which associates with 37% higher odds of MACE). Overall, a hypothetical individual experiencing the typical CMR abnormalities associated with higher L night exposure may have 5-times higher odds of MACE. Body mass index and hypertension appeared to mediate 20-50% of the observed associations. Findings were similar in those exposed to higher L den (Fig.2 B1-2). Participants who did not move home during follow-up and were continuously exposed to higher aircraft noise levels had the worst CMR phenotype. Conclusion: Higher aircraft noise exposure associates with adverse LV remodeling, potentially due to noise increasing the risk of obesity and hypertension. Findings are consistent with the existing literature on aircraft noise and CV disease, and need to be considered by policymakers and the aviation industry.

The Shear Performance of an Aircraft off Pin Made of Quartz Fiber Reinforced Phenolics: The Effect of the Fiber Distribution Property

Emergency breakaway pins (EBPs) have been widely used in aircraft, especially in the suspension connection between the engine device and the airfoil. Currently, the existing EBPs, which are made of metal materials, barely satisfy the lightweight requirement of the airplane industry. Thus, the construction of a novel EBP with quartz fiber reinforced phenolics is proposed in this study, and the shear response is examined experimentally using a double-sided shear test. The effect of the fiber distribution characteristic on the shear strength is then assessed quantitatively. The failure patterns, including the damage morphology of the two types of samples were then reconstructed using scanning electron microscopy (SEM). Experimental results showed that the breakaway composite pin fabricated by the laminated composite had a superior shear response than its counterpart with randomly distributed fibers for its uniaxially distributed fiber yarns provided a longer put-out damage trace that contributed to a higher shear-loading bearing capacity for the entire composite EBP. In specific, the average values of the shear strength and the shear stiffness for the former samples were higher by 61% and 22%, respectively, than that for the latter samples. Additionally, the composite EBP also has an excellent combination of lightweight advantage and stronger shear-bearing capacity over competing pins, providing novel insight for more secure designs for civil and military aviation.

Depoliticisation as a Diplomatic Defensive Strategy: Analysis of the International Conflicts Waged in the ICAO

ABSTRACT The research is dedicated to the International Civil Aviation Organisation (ICAO) and the politicised debates held on its forum. The purpose of the research was to investigate political debates on the ICAO forum and to analyse the attempts to terminate them through references to their political character or the technical character of ICAO. The main research question concerns the arguments used by the delegates/representatives engaged in political debates held on the ICAO forum. The researchers argued that the participants in these debates, mostly diplomats representing member states, have been employing depoliticisation techniques to terminate inconvenient debates, claiming that the ICAO is a technical organisation and political issues should not be debated there. The study covers several diplomatic standoffs at the ICAO forum: debates over ICAO membership/statehood in Spain, Taiwan, Cyprus and South Africa; various instances of the Arab-Israeli conflict; shootdowns of the Korean aircraft by the USSR and the Iranian aircraft by the US; and aviation aspects of the Iraqi invasion of Kuwait. The study specifically covered individual statements of state representatives and debates on the forum of the ICAO Council and Assembly. The research has been performed through qualitative content analysis of the ICAO archival documents acquired both online and during research visit to the ICAO headquarters in Montreal. It was observed that state representatives have been employing depoliticisation in order to defend their countries on the forum of the ICAO from the attacks associated with international conflicts. Depoliticisation as a diplomatic tactic, however, in most cases proved unsuccessful.

A contribution to mitigate NOx and H2O emissions for a hydrogen-powered hypersonic vehicle

AbstractHypersonic transport fueled with liquid hydrogen (LH2-HST) is currently considered as long-term future technology of civil aviation to fly with speeds greater than Mach 5 at stratospheric altitudes of 25–38 km. In this paper, we present a comprehensive methodology to assess the emission mitigation potential (via NOx and H2O) of future LH2-HST through operational measures, considering realistic constraints such as the sonic boom carpet as well as tolerable g-forces acting on the passengers while flying with hypersonic speeds. Both NOx- and H2O-optimal 4D-trajectories are identified by a brute-force algorithm that varies the initial cruise altitude from 30 to 36 km. As case study, the Mach 8 passenger aircraft STRATOFLY-MR3, which was conceptually developed in the framework of the H2020 STRATOFLY project, is operated on a single route from Brussels (BRU) to Sydney (MYA). The findings are highlighted as relative changes regarding MR3's design flight altitude set at 32 km, respectively, 105 000 ft. As scientific contribution, 3D emission inventories are calculated and made publicly available for a world fleet of MR3 aircraft operated along the BRU-MYA route on both NOx- and H2O-optimal mission profiles in the year 2075.

An improved prediction method for BDS-3 SISA parameters and the preliminary performance evaluation

Abstract The ephemeris accuracy parameters broadcast in the ephemeris messages are commonly utilized as an alarm threshold for the signal-in-space ranging errors (SISRE) of the Global Navigation Satellite System (GNSS). Accurately predicting the orbit and clock errors of broadcast ephemeris, and converting the prediction errors into broadcast ephemeris accuracy parameters using a robust model, is important for the integrity service of GNSS. The BeiDou Navigation Satellite System (BDS-3) broadcasts four ephemeris accuracy parameters, namely SIS A oe , SIS A ocb , SIS A oc1 , and SIS A oc2 , to represent the standard deviations of the satellite orbit and clock prediction errors in the broadcast ephemeris. The probability that the broadcast ephemeris SISRE exceeds 4.42 times the signal-in-space accuracy (SISA) without triggering an alarm in time is expected to be less than 1 × 10−5. In addition to accurately enveloping the broadcast ephemeris SISRE, SISA should also reduce the over-envelopment margin over SISRE to accurately express the system service accuracy. Thus, an accurate prediction of orbit and clock errors in the broadcast ephemeris is crucial for calculating the SISA. An orbit and clock error prediction method based on the Long Short-Term Memory (LSTM) neural network is proposed in this study. This method uses historical satellite orbit and clock errors, derived from the difference between precise and broadcast ephemeris, to train an LSTM neural network. The trained LSTM model is then used to predict the orbit and clock errors for the next 24 h. The predicted errors are used to calculate the corresponding SISA for the broadcast ephemeris. The results indicate that the 24 h accuracies of the predicted orbit and clock errors are less than 0.06 m and 0.25 m, respectively. The calculated SISA can completely envelop the actual broadcast ephemeris SISRE, achieving 100% coverage while also decreasing the over-envelopment margin by 80%. Furthermore, the horizontal protection level and vertical protection level calculated using the corresponding SISA are reduced by approximately 14%, meeting the integrity requirements set by the International Civil Aviation Organization for Approach with Vertical Guidance I. The proposed method enhances the timeliness of SISA parameter calculation and the integrity and availability of the BDS-3 service, serving as a crucial reference value for safety critical applications such as civil aviation services.

Aviation business growth; Does ground movement capacity and air space capacity matter?

Growth in any firm’s business is critical as a long-term objective of such a firm. The study thus focused on the influence of ground movement capacity and air space capacity on the growth of aviation businesses at Wilson Airport. The guiding objectives of this study were: to establish the effect of ground movement capacity on aviation business growth in Kenya and to assess the effects of airspace capacity on in Kenya. The study was guided by theory of constraints. The study employed an explanatory research design. The study targeted 117 respondents based at Wilson Airport. A Census survey was used in this study to collect information from all participants in the population. The study collected primary data using questionnaires. In testing for reliability, Cronbach’s alpha coefficient was applied. The Statistical Package for the Social Sciences (SPSS) was used for data analysis. Inferential data were analyzed using correlation and multiple regressions. The study findings revealed that ground movement capacity has a positive and significant effect on aviation business and airspace capacity has a positive and significant effect on aviation business growth. Ground movement capacity was an important determinant of aviation business growth. Kenya Civil Aviation Authority and Kenya Airports Authority should pool resources and increase the ground movement equipment and facilities. The study recommends that future researcher’s study on the influence of public, private partnership to increase the ground movement capacity on aviation growth can also be conducted.

Flight Hours and Depression in Flight Attendants During the COVID-19 Pandemic

INTRODUCTION: Flight attendants are constantly exposed to high-stress environments that could lead to the development of depression. The COVID-19 pandemic brought out new risk factors that could affect flight attendants’ mental health, such as reduced flight hours and fear of the disease itself, which other studies have shown was associated with depression. We aimed to find out whether reduced flight hours, fear of COVID-19, and other factors were associated with depression in flight attendants during the COVID-19 pandemic. METHODS: This cross-sectional study was conducted at the Directorate General Civil Aviation Medical Center Indonesia and Garuda Sentra Medika in 2022. We included flight attendants who were still employed before and after the start of the pandemic. Data were collected using several questionnaires, including the General Health Questionnaire-12 to screen for depression and Fear of COVID-19 for fear levels. RESULTS: We obtained data from 159 respondents, of whom 25.2% of them had depression. Multivariate analysis showed that the reduction of flight hours 1 yr after the start of the pandemic and fear of COVID-19 were found to significantly increase the likelihood of depression by 2.3 times and 3.9 times, respectively. DISCUSSION: During the pandemic, depression was found to be highly prevalent among flight attendants and was associated with the reduction of flight hours and fear of COVID-19. Sutrisno AB, Agustina A, Sosrosumihardjo D, Sugiharto A, Zulaecha SI, Khoe LC. Flight hours and depression in flight attendants during the COVID-19 pandemic. Aerosp Med Hum Perform. 2024; 95(11):826–830.

Research on the Efficiency of Major Airports in China’s Six Major Airport Cluster: Based on Common Frontier Super-Efficiency DEA and Malmquist Method

Airport clusters are of great significance to the sustainable development of the civil aviation transportation industry. The study utilises common frontier and super-efficiency DEA methods to assess the efficiency of China’s six major airport groups. It then employs the Malmquist index method to analyse changes in airport productivity. The results highlight regional disparities in airport efficiency. The East China Airport Group and the Southwest Airport Group consistently demonstrate excellent efficiency values, while the North China Airport Group and the Northeast Airport Group have significant room for improvement. Most airports within the groups operate at low and ineffective levels, with efficiency initially increasing and then decreasing. Moreover, the technology gap ratio (TGR) for each airport group somewhat shows a downward trend. The Malmquist index indicates that the overall factor productivity of each airport has generally remained stable, with efficiency growth primarily dependent on scale efficiency. On average, technical efficiency has increased by 1.5%. However, in terms of technological changes, most airports have experienced technological regression, indicating insufficient focus on technological improvement. Therefore, it is crucial to prioritise technological innovation and enhance management efficiency to achieve efficiency improvements in airport clusters. It is necessary to formulate strategies accurately based on the specific conditions of different regions, promote coordinated development, foster regional exchanges and cooperation, address regional disparities, ensure sustainable development of China’s airport clusters, and establish a world-class airport cluster.

Results of the study on the baseline status of flight-associated periodontal pathology in civil aviation flight personnel

Aim. To assess the baseline condition of periodontal structures in civil aviation flight personnel in order to improve the algorithm for treatment and preventive dental care.Materials and Methods. A periodontal examination of the oral cavity was conducted for 120 flight personnel at the physician-sanitary unit of Dushanbe International Airport. The participants were divided into five groups: flight personnel with mild chronic gingivitis, moderate chronic gingivitis, mild chronic periodontitis, moderate chronic periodontitis, and a control group of flight personnel with healthy periodontium. The clinical course of chronic gingivitis and periodontitis was evaluated using oral hygiene and periodontal indices.Results and Discussion. Inflammatory periodontal diseases, such as chronic gingivitis and periodontitis of moderate severity (Groups II and IV), presented with more pronounced symptoms, including severe inflammatory reactions of the periodontal tissues and poor oral hygiene, compared to those in Groups I and III.Conclusion. The study demonstrated that papillary-marginal-alveolar (PMA) index, bleeding index, and oral hygiene scores were significantly elevated in flight personnel with mild to moderate chronic periodontitis, highlighting the need for targeted treatment and preventive care.

Characterizing Aircraft Exhaust Emissions and Impact Factors at Tianjin Binhai International Airport via Open-Path Fourier-Transform Infrared Spectrometer

The growth of the civil aviation industry has raised concerns about the impact of airport emissions on human health and the environment. The aim of this study was to quantify the emissions of sulfur dioxide (SO2), nitrogen oxides (NOX), and carbon monoxide (CO) from in-service aircraft via open-path Fourier-transform infrared (OP-FTIR) spectroscopy at Tianjin Binhai International Airport. The results suggest that the CO and NOX emission indices (EIs) for five common aircraft/engine combinations exhibited substantial discrepancies from those reported in the International Civil Aviation Organization (ICAO) databank. Notably, during the idling, approach, and take-off phases, the CO EIs exceeded the ICAO’s standard values by (11.04 ± 10.34)%, (56.37 ± 18.54)%, and roughly 2–5 times, respectively. By contrast, the NOX EIs were below the standard values by (39.15 ± 5.80)%, (13.57 ± 3.67)%, and (21.22 ± 4.03)% in the same phases, respectively. The CO and NOX EIs increased by 31–41% and decreased by 23–24%, respectively, as the ambient temperature decreased from −3 °C to −13 °C. This was attributed to lower temperatures reducing fuel evaporation, leading to inefficient combustion and increased CO emissions and lowering the combustion temperature and pressure, resulting in reduced NOX emissions. The CO EIs had a positive correlation with humidity (adjusted R2: 0.715–0.837), while the NOX EIs were negatively correlated with humidity (adjusted R2: 0.758–0.859). This study’s findings indicate that humidity is a crucial factor impacting aircraft exhaust emissions. Overall, this research will contribute to the development of scientifically informed emission standards and enhanced environmental management practices in the aviation sector.

The Environmental Impact of a High-Altitude Medical Research Expedition.

Joyce, Kelsey E., Catherine A. Campbell, Arthur R. Bradwell, Samuel J.E. Lucas, Christopher T. Lewis, Rebekah A.I. Lucas, and Mark Edsell. The environmental impact of a high-altitude medical research expedition. High Alt Med Biol. 00:00-00, 2024. Introduction: Scientists must begin examining the environmental cost(s) of their research. The purpose of this study was to evaluate a component of the environmental impact of a high-altitude medical research expedition by totaling the carbon dioxide (CO2) emissions calculated from as many direct and indirect sources as possible. Methods: Eighteen individuals flew from London to Bagdogra (via Delhi), and then drove onward to Lachung (via Gangtok) where they began their ascent on foot to 4,800 m (Kanchenjunga National Park, Sikkim). Several research experiments were conducted throughout the expedition, which required use of a laboratory centrifuge, solid CO2 (specimen storage), rechargeable laptop computers and battery-powered oximeters. International Civil Aviation Organization calculators estimated aviation CO2 production. Land emissions were calculated for Mahindra vehicles. Solid waste was weighed and CO2 emissions estimated for its incineration. Results: Total CO2 emissions equated to ∼16.7 tonnes from the following sources: air and land transportation of expedition team (87.3%); sublimation and transportation of solid CO2 (7.7%), waste incineration (0.58%), generator transportation and gasoline (12 l) combustion (0.48%), and battery transportation (3.3%). Conclusions: Air travel contributed the most to the overall environmental cost of the research expedition. Further investigation is required to contextualize these findings in relation to lab-based alternative(s).

Evaluation of the Properties and Compositions of Blended Bio-jet Fuels Derived from Fast Pyrolysis Bio-oil made from Wood According to Aging Test

AbstractThe aviation industry has set ambitious goals for reducing carbon emissions, with the International Civil Aviation Organization targeting net-zero carbon emissions by 2050. Bio-jet fuel is expected to play a crucial role in achieving this target, and the demand for bio-jet fuel is projected to rapidly increase. Bio-oil from fast pyrolysis of lignin, such as waste wood, is considered a promising alternative for production of bio-jet fuel through processes such as hydrodeoxygenation. In this study, the physical properties and compositions of bio-jet fuel produced from wood-derived pyrolysis bio-oil blended with petroleum-based jet fuel as well as their changes during 16 weeks storage were investigated. Consistently, 0%, 10%, 50%, and 100% blended bio-jet fuels were prepared. After 16 weeks of aging, the total acid number of the all-blended bio-jet fuel showed a sharp increase from 12 weeks, reaching over 0.1 mg KOH/g. Additionally, kinematic viscosity showed a steady increase over 16 weeks whereas oxidative stability decreased by approximately 20% at 16 weeks for the 100% bio-jet fuel alone. The final boiling point increased by up to 20% in higher blends of bio-jet fuel and the average molecular weight increased. Bio-jet fuel has a high olefin content, which can further increase during storage, leading to a decrease in the combustion characteristics. This study suggests that using up to 10% the bio-jet fuel in aircraft is safe considering storage stability, but further research is required to confirm this finding.

Modeling Civil Aviation Emissions with Actual Flight Trajectories and Enhanced Aircraft Performance Model

Aviation emissions are continuously increasing along with the rapid development of air transportation, and results in the deterioration in regional air quality and the global climate. Accurate emission estimation is of great importance for relevant policies promotion and the sustainable development of the environment. Previous studies focused on the total emissions of a flight and lacked high precision in both spatial and temporal resolutions, especially aviation activities near ground. In this research, we propose an open-sourced emission calculation framework based on actual flight trajectories (TrajEmission), which calculates both the ground and airborne emissions simultaneously according to the configuration parameters, trajectory characteristics, and ambient conditions. We compare the emission results with five emission inventory methods. The results indicate that pollutant (nitrogen oxides, carbon monoxide, and unburned hydrocarbons) emissions in the landing and takeoff (LTO) cycle might usually be underestimated due to a lack of trajectory-based methods. In addition, in the overall results, the method based on the great circle route leads to an overestimation of 56.8% of pollutant emissions compared to the method based on actual routes. We also investigate the extent to which other factors could influence the emission results. To summarize, the TrajEmission framework can build inventories for the whole process of flight movements with high spatial–temporal resolutions and provide solid data support for environmental science and other related fields.

Performance degradation modeling of civil aviation engines based on component characteristic map optimization

In order to provide a theoretical basis for the degradation of the air path performance of civil aviation engines at the unit level, the CFM56-3 engine was used as the research object. First, on the basis of using the characteristic map scaling method to obtain the component characteristic equation, the selection process of the scaling reference point of the fan general characteristic map was optimized, and a surface fitting method of the characteristic map was proposed to construct an engine component-level benchmark performance model that meets specific speed conditions under steady-state conditions. Then, by introducing the fault factor to generate the fault coefficient matrix, the deviation of the engine monitoring parameters as the component efficiency decreases was calculated, and compared with the fingerprint map data of the GE training manual, it was verified that the engine steady-state performance model that integrates the fan characteristic map scaling reference point optimization and the characteristic map surface fitting method has good accuracy and use in the analysis of air path performance degradation.

Noise Study Auralization of an Open-Rotor Engine

Based on the performance and acoustic data files of reduced-size open-rotor engines in low-speed wind tunnels, the static sound pressure level was derived by converting the 1-foot lossless spectral density into sound-pressure-level data, the background noise was removed, and the results were corrected according to the environmental parameters of the low-speed wind tunnels. In accordance with the requirements of Annex 16 of the Convention on International Civil Aviation Organization and Part 36 of the Civil Aviation Regulations of China on noise measurement procedures, the takeoff trajectory was physically modeled; the static noise source was mapped onto the takeoff trajectory to simulate the propagation process of the noise during takeoff; and the 24 one-third-octave center frequencies that corresponded to the SPL data were corrected for geometrical dispersion, atmospheric absorption, and Doppler effects, so that the takeoff noise could be corrected to represent a real environment. In addition, the audible processing of noise data with a 110° source pointing angle was achieved, which can be useful for enabling practical observers to analyze the noise characteristics.

Research on the Carbon Emission Prediction and Reduction Strategies for the Civil Aviation Industry in China: A System Dynamics Approach

With the continuous growth in the volume of global air transportation, the carbon emissions of the civil aviation industry have received increasing attention. Carbon emission reduction in civil aviation is an inevitable requirement for achieving sustainable social development. This article aims to use system dynamics (SD) methods to establish a carbon emission model for the civil aviation industry that includes economic, demographic, technological, policy, and behavioral factors; analyze the key factors that affect carbon emissions; and explore effective emission reduction strategies. Researchers have found that SD-based carbon emission prediction has a high accuracy and is suitable for predicting carbon emissions in civil aviation. Through different scenario simulations, it has been found that any single emission reduction measure will struggle to effectively contribute to the expected carbon reductions in China’s civil aviation. Simultaneously adopting measures such as improving fuel efficiency, adopting clean energy, and using new-power aircraft is an effective way to reduce carbon emissions from civil aviation. In addition, policy intervention and technological innovation are equally crucial for achieving long-term emission reduction goals. The research results not only provide a scientific basis for the sustainable development of the aviation industry but also provide a reference for policymakers to formulate comprehensive emission reduction strategies.

The Lessons from Sanctions on Iran and Their Impacts on the Development of Civil Aviation Understanding and Iranian Airlines

After the Islamic Revolution, Iran lived through many hard times not only because of its economic and financial resources such as oil and petroleum but also because of its historical, social, supremacy and leadership of some other Islamic countries and communities. Essentially, it has tried to defend its position for many years without sacrificing its Idiosyncratic Islamic governance structure within the world context or other Islamic countries, for these reasons, it has witnessed a lot of economic and financial sanctions or bans. Although Iran has a lot of highly qualified academicians and a workforce in the science of aviation, its civil aviation management structure and related activities, such as airline management, are very far from the average of the world depending on these financial and economic sanctions and bans by international orders. This situation is subjected to this research as a gap. This paper will analyse the civil aviation and air carrier industry of Iran under the impacts of these economic and financial bans and sanctions regarding four dimensions: Maintenance, Training and licensing, corporal development, and relationships with manufacturers. Essentially, at the beginning of the new age, in terms of international politics and conflicts in every continent of the world, new sanctions and bans are on the trouble agenda of world civil aviation agencies and institutions because of their highly political structure, and these bans and sanctions carry generally economic and financial identities, although they have international policy claims. There are a lot of possibilities on the desks of the civil aviation authorities for the burdens of these sanctions and bans and their sustainability impacts on civil aviation. Moving from the situation of Iran, the correct courses and necessary economic and financial policies will be suggested in this new world context and understanding.