scholarly journals Tradeoff Study between Cost and Environmental Impact of Aircraft Using Simultaneous Optimization of Airframe and Engine Cycle

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Xiao Chai ◽  
Xiongqing Yu ◽  
Yu Wang
Keyword(s):  
Environmental Impact ◽  
Performance Metrics ◽  
Large Diameter ◽  
Operating Cost ◽  
Operating Costs ◽  
Oxides Of Nitrogen ◽  
Nitrogen Emissions ◽  
The Impact ◽  
Single Objective ◽  
Engine Cycle

To investigate more efficient aircraft configurations which have less environmental impact, this paper develops a multidisciplinary analysis framework integrated with the airframe and propulsion analysis modules. The characteristics for propulsion, aerodynamics, weight, performance, cost, emissions, and noise can be rapidly predicted by the framework. The impact of propulsion installation with large diameter engines on aircraft weight and drag are considered in the framework. A wide-body aircraft was taken as an example for the optimization to investigate the tradeoffs between the cost metric and the environmental performance metrics. Several cases for single objective and multiobjective optimizations were performed. In the single objective optimizations, the direct operating cost, the cumulative noise, the oxides of nitrogen emissions during landing-takeoff cycle, and the mission oxides of nitrogen emissions were considered as an objective and minimized, respectively. The different objectives resulted in designs with different airframe parameters and engine cycle parameters. In the multiobjective optimizations, the direct operating costs and environmental performances were considered as the objectives simultaneously. The optimization results were the Pareto fronts for the minimum direct operating costs and environmental performances, which illustrate the quantitative relationships between the economic metric and the environmental performances.

scholarly journals An Empirical Study on the Influence of Diversification on the Operating Cost of Commercial Banks

CONVERTER ◽  
2021 ◽  
pp. 757-770
Author(s):  
Jing He, Ke Zou, Xinyi Cai
Keyword(s):  
Strategic Alliances ◽  
Commercial Banks ◽  
Management Strategies ◽  
Operating Cost ◽  
Operating Costs ◽  
Economies Of Scope ◽  
Excessive Competition ◽  
Income Ratio ◽  
The Cost ◽  
The Impact

The majority of the literature has focused on the impact of diversification on bank performance, while the research on the impact of diversification on bank costs is inadequate. Therefore, in this paper we empirically analyzed the impact of diversification on operating costs through a panel regression model, collecting the data of 47 Chinese commercial banks from 2005 to 2015. The empirical results showed that an increase in the non-interest income ratio significantly promoted a decrease in the cost–income ratio, and the robustness tests of different time intervals and different types of banks were consistent. This suggests that diversification effectively reduced the operating costs of banks by means of the sharing of information and equipment, the reduction of asset specificity, and the improvement of operation management synergy. This also indicates that excessive competition costs and the agency costs of diversification were lower. Further analysis showed that the diversification of national banks compared with local banks was more significant in reducing operating costs, and, for the national banks, the effects of economies of scope and scale were stronger. Diversified management strategies for local banks should be carefully promoted through the construction of strategic alliances, mergers and acquisitions, etc.

scholarly journals Operating cost analysis: sources and methods

2019 ◽  
pp. 132-138
Author(s):  
Nadiya Khorunzhak ◽  
Tetyana Portovaras
Keyword(s):  
Cost Optimization ◽  
Operating Cost ◽  
Operating Costs ◽  
Sources Of Information ◽  
Methods Of Analysis ◽  
External Sources ◽  
Internal Sources ◽  
Abc Analysis ◽  
The Cost ◽  
The Impact

Purpose. The aim of the article is identification of requirements and composition of sources of analysis, critical assessment of their information content, as well as emphasis on the application of a systematic approach to the analysis of operating costs and compliance of its method with these criteria. Methodology of research. The empirical research methods are used in the course of the research, in particular: analysis – in order to identify the composition of sources of analysis of operating expenses; generalization – to substantiate the classification of sources of analysis and to formulate recommendations on the choice of methods of analysis, which most fully allow to estimate the operating costs. Findings. The principles of formation of information base of the analysis of operating expenses are substantiated, which will allow to obtain high-quality information on their status and on the basis of the obtained results to predict the activity of the enterprise in the future. The study of the impact of factors on the analysis of operating expenses allowed us to distinguish sources of information into two groups: internal and external. It is determined that internal sources of data for analysis are accounting records, which are formed at enterprises, and which is considered by the authors as a source of analysis of operating expenses. External sources of information the authors consider all possible information resources of an external nature, research of the competitive environment and reporting of subjects with similar types of activity. Originality. The scheme of interconnection sources and analysis results of operations is proposed, which comprehensive utilization, will allow obtaining result analytical information on which management can optimize the cost of compliance with objectives and increase effectiveness of operations. According to modern realities, the most suitable methods of analysis are offered, which allow to adequately assessing the situation of the enterprise in the strategic plane with respect to operating expenses. Practical value. Carrying out an assessment of the operating costs of an enterprise with using various methods and tools of analysis in a complex provides obtaining unbiased data that can be effectively used for the purpose of cost optimization and increase of productivity. Key words: analysis; operating costs; cost optimization; internal sources of information; external sources of information; strategic methods; ABC analysis.

scholarly journals Impacts of the BOPS Option on Sustainable Retailing

2020 ◽  
Vol 12 (20) ◽  
pp. 8600
Author(s):  
Yi He ◽  
Qianqian Xu ◽  
Da Zhao
Keyword(s):  
Environmental Impact ◽  
Operating Cost ◽  
Analytical Models ◽  
Extended Model ◽  
Equilibrium Solutions ◽  
Product Price ◽  
Dual Channel ◽  
Impact Reduction ◽  
Channel Preference ◽  
The Impact

This paper focuses on the value of an omnichannel retailing option, Buy-Online-and-Pick-up-in-Store (BOPS), in reducing environmental impact. Analytical models were established to explore the impacts of the BOPS strategy on the pricing and expected profit of the dual-channel retailer as well as the environment. The equilibrium solutions under dual-channel and omnichannel scenarios were obtained. Then, we considered the impact of loyal store consumers in the extended model. We find that the retailer will increase the product price after adopting the BOPS strategy. Our analytical results also show that when the operating cost of the BOPS strategy is relatively low, the total demand under the omnichannel scenario is greater than that under the dual-channel scenario and vice versa. In addition, this strategy can always reduce the environmental impact in terms of the pure online demand. Finally, when the operating cost is lower and the fraction of consumers without channel preference is higher, the retailer can benefit from the BOPS strategy. In this case, the BOPS strategy can achieve profit improvement and environmental impact reduction.

The Modified Configuration of Wet Wash System in the Gulf of Thailand

2021 ◽  
Author(s):  
Khemchad Sumitra ◽  
Marty Fernau ◽  
Karn Thanomkiat ◽  
Joseph Ritcey ◽  
Chadchai Tumtong
Keyword(s):  
Environmental Impact ◽  
Ultrafine Particles ◽  
Operating Cost ◽  
Original System ◽  
Operating Costs ◽  
Optimum Operating ◽  
Low Gravity ◽  
Normal Manner ◽  
Bowl Centrifuge ◽  
Jack Up

Abstract "Wet Wash" is a concept whereby cuttings are fluidized then sent to centrifuges to seperate the fluids from the cuttings. A modified configuration of this Wet Wash system improves fluids performance while minimizing environmental impact and optimizing operating costs. The original Wet Wash system, introduced in 2006, started at the shale shakers where big cuttings were removed by the scalping deck and diverted overboard. Only the small cuttings from the primary deck were fluidized and transported to a big bowl centrifuge. For the original system, the % Synthetic on Cuttings (SOC) for this process was always over 8.0%. The system was unable to lower the SOC due to concerns for the capability of the big bowl centrifuge to handle big cuttings. With a modified centrifuge unit, a more robust unit with a design change in feed nozzles being able to handle more torque, all cuttings from both scalping deck and primary deck are fluidized and transported to a big bowl centrifuge with no big cuttings diverted overboard. Utilizing the previous configuration of Wet Wash whereby cuttings from the scalper deck were diverted overboard, the % SOC was always over 8.0%. It was efficient in the removal of solids, but it was still yielding high SOC. In 2012 the use of Cuttings Dryers was introduced to further reduce % SOC. On Jack-up rigs, the Cuttings Dryer can operate in a normal manner, but on Tender Assisted rigs, where the cuttings are fluidized and pumped to the Dryer, there is a trade-off. High content of Low Gravity Solids (LGS) from the continual grinding of the solids to ultrafine particles that could not be removed by centrifuges had become an issue. High dilution rates were required to keep mud system under control due to excessive ultrafine solids. The Wet Wash system was re-visited for Tender Assisted rigs. With the modified configuration of Wet Wash system where no cuttings were diverted overboard, fluids performance was improved from reduction of ultrafine solids contamination in the mud system, resulting in less dilution rate and mud chemicals treatment. The % SOC was also lower than 8.0%. With proper Preventative Maintenance (PM) program in place, there was neither down time of the centrifuge nor report of excessive wear of equipment from handling big cuttings. The novelty of the modified Wet Wash configuration is in the ability to improve fluids performance and reduce environmental impact with the optimum operating cost.

An Evaluation of Economic Model for Assessing Aviation Environmental Impacts towards Airline Operations

2014 ◽  
Vol 629 ◽  
pp. 338-343
Author(s):  
Siti Nur Mariani Mohd Yunos ◽  
Mohammad Fahmi Abdul Ghafir ◽  
A.A. Wahab
Keyword(s):  
Economic Model ◽  
Operating Cost ◽  
Operating Costs ◽  
Estimation Methods ◽  
Airline Operations ◽  
The Public ◽  
Direct Operating Cost ◽  
Initial Work ◽  
The Impact ◽  
Good Agreement

Environmental concerns due to aviation emissions and noise have resulted in introduction of emission and noise charges imposed by airports to airline operators. In order to assess the impact of emission and noise towards the airline's operating costs, this paper presents the initial work in developing an economic model and explains the validation and application of the direct operating cost (DOC) estimation used by the model. A comparison with another two DOC estimation methods has also been performed. The results indicate that the estimated cost is in a good agreement with the data from the public domain despite the differences with data from other estimation methods due to the variation of approach adopted by each model. Finally, an inclusion of environmental charges in DOC is also presented, which shows the amount is relatively small. Nonetheless, in order to ensure a sustainable airline operations, further actions in reducing aviation emission and noise are essential.

Impact of Operating Cost Reduction on The Economic Challenges Facing Small-Size Clothing Factories in Saudi Arabia

2020 ◽  
Vol 7 (9) ◽  
pp. 706-730
Author(s):  
Sarah Aldaady ◽  
Amal Basafar
Keyword(s):  
Saudi Arabia ◽  
Cost Reduction ◽  
Manufacturing Industry ◽  
Operating Cost ◽  
Value Added ◽  
Operating Costs ◽  
Factors Affecting ◽  
Trade Law ◽  
Manufacturing Technologies ◽  
The Impact

The clothing manufacturing industry in the Kingdom of Saudi Arabia has faced many challenges at the local and international level. The implementation of the rules and regulations of the World Trade Organization (WTO) and the Kingdom’s Vision 2030 have gained particular interest and operating with minimum costs has become one of the main objectives of small-size clothing factories. The impact of operating cost reduction on economic challenges facing the clothing factories has been studied with the aim to identify the challenges and economic factors affecting operating costs. It was concluded that some of the economic challenges are represented in the high operating cost caused by the application of new taxes, including the value-added tax (VAT), imposition of fees on non-Saudi workers and new amendments to the trade law. Minimizing operating costs through cutting-edge manufacturing technologies were found to be a key solution to ensure factories’ survival and sustainability.

The Impact of Regulatory Growth on Operating Costs

2020 ◽  
Author(s):  
Richard Fullenbaum ◽  
Tyler Richards
Keyword(s):  
Operating Costs ◽  
The Impact

Fish farming in Denmark: environmental impact of regulative legislation

1995 ◽  
Vol 31 (10) ◽  
pp. 73-84 ◽  
Author(s):  
T. M. Iversen
Keyword(s):  
Organic Matter ◽  
Environmental Impact ◽  
Freshwater Fish ◽  
Aquatic Environment ◽  
Action Plan ◽  
Fish Farming ◽  
Fish Farms ◽  
Nitrogen And Phosphorus ◽  
Local Impact ◽  
The Impact

The main environmental problems associated with fish farming in Denmark are attributable to the dam, the “dead reach” and nutrient and organic matter discharge. The environmental regulation of fish farming in Denmark started with the Environmental Protection Act of 1974, the Statutory Order of 1985 forbidding wet feed, and the Action Plan on the Aquatic Environment of 1987. In the case of freshwater fish farms, the latter was implemented through the measures stipulated in the 1989 Statutory Order on Fish Farms. The impact of Danish legislative measures to reduce and regulate the environmental effects of freshwater fish farms can be summarized as follows: - the number of fish farms has been reduced from about 800 in 1974 to about 500 at present; - production has tripled since 1974 and has been stable since 1989; - a change from wet to dry feed has reduced the environmental impact of the farms; - the national goals of the Action Plan on the Aquatic Environment of 1987 for reducing fish farm discharges of organic matter, nitrogen and phosphorus have been fulfilled. The main remaining problems are that: - the local impact of fish farms on downstream stream quality is still much too high in about 15% of cases; - the problem of the passage of migrating invertebrates and fish is still unsolved at some farms; - the problems posed by “dead reaches” are still unsolved. It is concluded that sustainable fish farming is possible in Denmark, but with the present technology production will have to be significantly reduced.

Environmental Management of Coastal Development, State of Kuwait

1999 ◽  
Vol 40 (7) ◽  
pp. 47-53 ◽  
Author(s):  
Y. R. Marmoush
Keyword(s):  
Environmental Impact ◽  
Practical Experience ◽  
Term Effect ◽  
Marine Ecology ◽  
Coastal Development ◽  
Long Term Effect ◽  
Environmental Measures ◽  
Environmental Feasibility ◽  
Development State ◽  
The Impact

The impact of coastal development in Kuwait is to be assessed as per the following environmental conditions: water circulation, sediment behavior, water quality, and marine ecology and fisheries. The objectives of this assessment are to identify and predict the environmental impact associated with coastal development and the various activities involved in any coastal project. These activities and their associated impact can be grouped into two categories: those that occur during construction (short-term effect), and those that occur after construction (long-term effect). This paper attempts to present the fundamental issues related to the environmental measures and the practical experience required to evaluate the potential environmental impact of coastal development in Kuwait. The conclusions and general considerations regarding the environmental feasibility of coastal development are given, and measures to minimize the adverse impact on the environment are recommended.

scholarly journals THE FUTURE OF PASSENGER AIR TRANSPORT – VERY LARGE AIRCRAFT AND OUT KEY HUMAN FACTORS AFFECTING THE OPERATION AND SAFETY OF PASSENGER AIR TRANSPORT

2017 ◽  
Vol 12 ◽  
pp. 104
Author(s):  
Petra Skolilova
Keyword(s):  
Human Factors ◽  
Human Error ◽  
Operating Cost ◽  
Aircraft Design ◽  
Air Transport ◽  
Final Decision ◽  
Factors Affecting ◽  
Fuel Burn ◽  
The Future ◽  
The Impact

The article outlines some human factors affecting the operation and safety of passenger air transport given the massive increase in the use of the VLA. Decrease of the impact of the CO2 world emissions is one of the key goals for the new aircraft design. The main wave is going to reduce the burned fuel. Therefore, the eco-efficiency engines combined with reasonable economic operation of the aircraft are very important from an aviation perspective. The prediction for the year 2030 says that about 90% of people, which will use long-haul flights to fly between big cities. So, the A380 was designed exactly for this time period, with a focus on the right capacity, right operating cost and right fuel burn per seat. There is no aircraft today with better fuel burn combined with eco-efficiency per seat, than the A380. The very large aircrafts (VLAs) are the future of the commercial passenger aviation. Operating cost versus safety or CO2 emissions versus increasing automation inside the new generation aircraft. Almost 80% of the world aircraft accidents are caused by human error based on wrong action, reaction or final decision of pilots, the catastrophic failures of aircraft systems, or air traffic control errors are not so frequent. So, we are at the beginning of a new age in passenger aviation and the role of the human factor is more important than ever.

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