Determination of airports’ atmospheric mixing height boundaries using operational data

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Alper Dalkıran
Keyword(s):  
Design Methodology ◽  
Average Duration ◽  
Data Sets ◽  
Mixing Height ◽  
Content Type ◽  
Aircraft Landing ◽  
Segment Data ◽  
Operational Data ◽  
Practical Implications

Purpose This study aims to determine the distance and duration to reach airports mixing height of 3,000 feet limit. Airport operations significantly contribute to the aircraft landing and take-off (LTO) cycle. Eurocontrol’s SO6 data sets comprise several abutted segment data to analyse the duration and distance for specific flights. Design/methodology/approach Two consequential methods have been used to calculate the distance and destination from the SO6 databases. First, SQL filtering and pivot tables were formed for the required data. Second, over 583,000 data lines for a year of Boeing 747–400 aircraft routes were calculated and filtered for the monthly assessments. Findings LTO cycles’ durations have deviated −24% to 76% from the ICAO assumptions. Distance facts determined for specific airports as 2.57 to 3.66 nm for take-off and 5.02 to 23.25 nm for the landing. The average duration of the aircraft’s in mentioned airport take-off are 66 to 74 s and 40 to 50 s; averages have been calculated as 70 to 44 s. Landing durations have been calculated for four different airports as 173 to 476 s. Practical implications This study provides a re-evaluation chance for the current assumptions and helps for better assessments. Each airport and aircraft combinations have their duration and distance figures. Originality/value This study has calculated the first LTO distances in the literature for the aerodrome. This method applies to all airports, airline fleets and aircraft if the segmented SO6 data are available.

A vision-based method for supporting autonomous aircraft landing

2018 ◽  
Vol 90 (6) ◽  
pp. 973-982 ◽  
Author(s):  
Mariusz Oszust ◽  
Tomasz Kapuscinski ◽  
Dawid Warchol ◽  
Marian Wysocki ◽  
Tomasz Rogalski ◽  
...  
Keyword(s):  
Real World ◽  
Design Methodology ◽  
Auxiliary Information ◽  
Content Type ◽  
Flight Data ◽  
Aircraft Landing ◽  
Potential Source ◽  
Lighting Systems ◽  
Practical Implications

PurposeThis paper aims to present a vision-based method for determination of the position of a fixed-wing aircraft that is approaching a runway.Design methodology/approachThe method determines the location of an aircraft based on positions of precision approach path indicator lights and approach light system with sequenced flashing lights in the image captured by an on-board camera.FindingsAs the relation of the lighting systems to the touchdown area on the considered runway is known in advance, the detected lights, seen as glowing lines or highlighted areas, in the image can be mapped onto the real-world coordinates and then used to estimate the position of the aircraft. Furthermore, the colours of lights are detected and can be used as auxiliary information.Practical implicationsThe presented method can be considered as a potential source of flight data for autonomous approach and for augmentation of manual approach.Originality/valueIn this paper, a feasibility study of this concept is presented and primarily validated.

Causality in qualitative market and social research

2019 ◽  
Vol 22 (3) ◽  
pp. 405-413
Author(s):  
Clive Roland Boddy
Keyword(s):  
Qualitative Research ◽  
Design Methodology ◽  
Social Research ◽  
Pragmatic Approach ◽  
Social Phenomena ◽  
Content Type ◽  
The Past ◽  
The Moment ◽  
Practical Implications

Purpose Academic qualitative researchers have been criticized for rejecting the idea that their research can establish causality while market and social researchers, with their realist and pragmatic approach to research, take for granted that it can. This paper aims to explore the ability of qualitative research to determine cause and effect in terms of market and social phenomena. Design/methodology/approach The literature on causality in qualitative research is reviewed and discussed. The discussion is further informed by the author’s own experience of undertaking commercial and academic market and social qualitative research over the past 33 years. Findings In qualitative market and social research, the determination of causality is often needed but rarely discussed. This paper explores this occurrence and brings to the fore, via discussion and the use of example, the ways in which causality can be determined by qualitative research. Practical implications A determination of what events bring about predictable changes in social and market environments can be established via qualitative research particularly at a probabilistic level of causality. This implies that policymakers should give a greater emphasis to qualitative findings than then sometimes do at the moment. Originality/value Causality in market and social research is rarely discussed by practitioners but is nevertheless a premise of much of the qualitative research that is undertaken. This paper is therefore distinctive in that it examines whether this premise is justifiable.

Profit-sharing investment accounts in islamic banks or mutualization, accounting perspective

2016 ◽  
Vol 14 (1) ◽  
pp. 30-48 ◽  
Author(s):  
Wasim K. AlShattarat ◽  
Muhannad A. Atmeh
Keyword(s):  
Financial Reporting ◽  
Mutual Fund ◽  
Design Methodology ◽  
Profit Sharing ◽  
Islamic Banks ◽  
Content Type ◽  
Implementation Challenges ◽  
Total Profit ◽  
Practical Implications

Purpose Islamic banks use Mudarabah contract to replace the interest-bearing deposits with profit-sharing investment accounts. The purpose of this paper is to explore the challenges and problems associated with the employment of Mudarabah contract by Islamic banks. Design/methodology/approach The study critically analyzes the Mudarabah contract used by Islamic banks. It reviews the evolution of the contract from its traditional type to more complicated types such as compound, unrestricted, commingled and continuous Mudarabah. The paper investigates the problems that have emerged from implementing such types in current business settings. Findings The paper proves that implementing the Mudarabah contract by banks imposes several problems among which are the following: difficulty in the determination of total profit resulting from Mudarabah and in allocating this profit to the multiple parties involved in Mudarabah; usage of reserves to cater against future losses may undermine the concept of Mudarabah profit-loss sharing and lead to earnings management; corporate governance is also a major problem in Mudarabah contract, as the depositors are exposed to risks but have no governance rights; and Mudarabah may also lessen the fair presentation of financial reporting. Research limitations/implications The paper examines the evolving Mudarabah contract and its implementation challenges, based on available literature (no empirical analysis was conducted). Practical implications The implications are significant for the future development of Islamic contracts and Islamic accounting treatments. Originality/value Many studies explored the Mudarabah contract from a Shariah or law perspective. However, this paper investigates the Mudarabah contract with a focus on the implication on accounting and financial reporting because of the lack of studies in this area. Furthermore, it demonstrates the persistent flaws in the Mudarabah contract, and it proposes a new model for mobilizing funds, i.e. mutual fund.

Evaluation of residual clearance after pre-joining and pre-joining scheme optimization in aircraft panel assembly

2016 ◽  
Vol 36 (4) ◽  
pp. 376-387 ◽  
Author(s):  
Di Yang ◽  
Weiwei Qu ◽  
Yinglin Ke
Keyword(s):  
Pareto Optimality ◽  
Design Methodology ◽  
Elastic Behavior ◽  
Assembly Model ◽  
Content Type ◽  
Scheme Optimization ◽  
Constrained Variation ◽  
Practical Implications ◽  
Excessive Number

Purpose For the automatic drilling and riveting in panel assembly, gaps between the skin and strangers are inevitable and undesirable. At present, the determination of pre-joining schemes relies on workers’ experience, introducing excessive number and inappropriate locations of pre-joining. This paper aims to present a new method for the evaluation of residual clearances after pre-joining and the pre-joining scheme optimization, providing operation guidance for the workers in panel assembly workshop. Design/methodology/approach In this paper, an equivalent gap assembly model for pre-joining is proposed on the basis of the mechanism of variation. This model retains the essential elastic behavior of the key features during the pre-joining operation and calculates the residual clearances in the view of the potential energy. Subsequently, this method is embedded into a Pareto optimality-based genetic algorithm, and the optimal pre-joining schemes are achieved with the consideration of the total residual clearances and the permissive tolerances. Findings The equivalent gap assembly model has the capability to predict an acceptable degree of accuracy of the residual clearances and achieve the optimized pre-joining schemes with less number of pre-joining at the same level of residual clearances. Practical implications The optimized pre-joining schemes are given in the form of Pareto optimality set, and workers can select suitable results according to their inclination to the quality and efficiency. Originality/value The paper is the first to propose the equivalent gap assembly model for the pre-joining operation, which provides for the simplification of the calculation of residual clearances based on the constrained variation principles.

BOLD (Big and Open Linked Data): what’s next?

2017 ◽  
Vol 34 (5) ◽  
pp. 10-13 ◽  
Author(s):  
Stuti Saxena
Keyword(s):  
Open Source ◽  
Linked Data ◽  
Design Methodology ◽  
Data Sets ◽  
Content Type ◽  
Data Architecture ◽  
Different Sources ◽  
Practical Implications

Purpose The purpose of this paper is to appreciate the futuristic trends of Big and Open Linked Data (BOLD). While designating the ongoing progress of BOLD as BOLD 0.0, the paper also identifies the trajectory of BOLD 0.0 as BOLD 1.0, BOLD 2.0 and BOLD 3.0 in terms of the complexity and management of data sets from different sources. Design/methodology/approach This is a viewpoint and the ideas presented here are personal. Findings The trajectory of BOLD shall witness ever-growing challenges as the nature and scope of data sets grow complicated. The paper posits that by the time BOLD would attain its maturity, there would be a need for newer technologies and data architecture platforms which are relatively affordable and available as “Open Source”, if possible. Research limitations/implications Being exploratory in approach, this viewpoint presents a futuristic trend, which may or may not be valid. Nevertheless, there are significant practical implications for the academicians and practitioners to appreciate the likely challenges in the coming times for ensuring the sustainability of BOLD. Originality/value While there are a number of studies on BOLD, there are no studies which seek to propose the possible trends in BOLD’s progress. This paper seeks to plug this gap.

scholarly journals Gender bias in sentiment analysis

2018 ◽  
Vol 42 (1) ◽  
pp. 45-57 ◽  
Author(s):  
Mike Thelwall
Keyword(s):  
Sentiment Analysis ◽  
Gender Bias ◽  
Design Methodology ◽  
Data Sets ◽  
Men And Women ◽  
Content Type ◽  
Males And Females ◽  
The Uk ◽  
Gender Specific ◽  
Practical Implications

Purpose The purpose of this paper is to test if there are biases in lexical sentiment analysis accuracy between reviews authored by males and females. Design/methodology/approach This paper uses data sets of TripAdvisor reviews of hotels and restaurants in the UK written by UK residents to contrast the accuracy of lexical sentiment analysis for males and females. Findings Male sentiment is harder to detect because it is less explicit. There was no evidence that this problem could be solved by gender-specific lexical sentiment analysis. Research limitations/implications Only one lexical sentiment analysis algorithm was used. Practical implications Care should be taken when drawing conclusions about gender differences from automatic sentiment analysis results. When comparing opinions for product aspects that appeal differently to men and women, female sentiments are likely to be overrepresented, biasing the results. Originality/value This is the first evidence that lexical sentiment analysis is less able to detect the opinions of one gender than another.

Introducing a concept for efficient design of EFQM excellence model

2015 ◽  
Vol 27 (4) ◽  
pp. 382-396 ◽  
Author(s):  
Seyed Amir Bolboli ◽  
Markus Reiche
Keyword(s):  
Corporate Culture ◽  
Design Methodology ◽  
Review Of Literature ◽  
Efficient Design ◽  
Maturity Level ◽  
Comprehensive Review ◽  
Content Type ◽  
Model Based ◽  
Practical Implications

Purpose – The purpose of this paper is to propose a roadmap for operationalizing EFQM excellence model based on the RADAR logic and in parallel develop a new concept for selecting the firm-specific EFQM measures based on the level of maturity and the prevailing corporate culture. Design/methodology/approach – A comprehensive review of literature leads to a clarification of the relation between EFQM measures and RADAR logic and also identification of the requirements for assessment of culture and determination of maturity level in the context of EFQM excellence model. Based on these requirements, existing culture assessment approaches and maturity assessment methods have been evaluated. Findings – The main outcome of this research is a new concept for efficient design of EFQM excellence model. This concept consist of three main parts: assessment of culture types in context of EFQM; assessment of maturity level; and design of EFQM measures based on RADAR logic. The findings are expected to reduce the effort for implementation of EFQM by designing tailored measures that fit to the existing culture and maturity level. Practical implications – The findings of this study are relevant to multinational large firms that deal with EFQM or similar excellence models. Originality/value – This paper presents a new concept for designing EFQM in the light of prevailing corporate culture and maturity level, which in one hand needs fewer resources and on the other hand it is more effective in implementation.

How to make knowledge resources valuable

2017 ◽  
Vol 47 (1) ◽  
pp. 42-54 ◽  
Author(s):  
Syed Amjad Hussain
Keyword(s):  
Design Methodology ◽  
Knowledge Integration ◽  
Content Type ◽  
Knowledge Resources ◽  
Knowledge Resource ◽  
Integration Point ◽  
Ability Levels ◽  
Knowledge Requirements ◽  
Practical Implications

Purpose This paper aims to offer an integration point for newly acquired heterogeneous knowledge resources to be assessed if these resources qualify to be a part of a firm’s existing knowledge resource portfolio. Focus of this paper will be on the development of knowledge integration point (KIP), in addition to the factors helping in determination of this KIP, for example, manager’s judgment about the firms’ knowledge requirements, knowledge reserve a potential employee should have and firm’s existing knowledge resource portfolio. Design/methodology/approach This study includes a content analysis. Findings Firms should have only those resources which contribute to value creation for the customers and the organization. Presence of any other knowledge resource which does not have the ability to create value is a waste of value. It is the knowledge managers’ responsibility to decide whether a knowledge resource should be a part of a firm’s existing knowledge portfolio. This decision should be taken before the acquisition of that knowledge resource, i.e. at KIP, then it would be more easy for knowledge managers to handle and integrate them with the existing set of firm’s knowledge resources. Practical implications If the potential knowledge resource is evaluated at KIP to know its level of integration and configuration ability with the existing firms’ knowledge resource portfolio, then it will take less time and efforts to integrate. It will take such firms far ahead than those whose acquired resources took much time to integrate. Hence, resource’s integration and configuration ability levels affect the speed of integration, which ultimately provides opportunity to firms to perform well. Originality/value KIP may help to make speedier integration process, which eventually leads firms to perform better.

Study of factors which facilitate increase of effectiveness of university education

2017 ◽  
Vol 31 (1) ◽  
pp. 12-20 ◽  
Author(s):  
Adam Albekov ◽  
Tatyana Romanova ◽  
Natalya Vovchenko ◽  
Tatyana Epifanova
Keyword(s):  
Market Economy ◽  
Design Methodology ◽  
Academic Staff ◽  
University Education ◽  
Practical Significance ◽  
Content Type ◽  
Russian Universities ◽  
Practical Implications

Purpose The purpose of this paper is to study the factors which facilitate the increase of effectiveness of university education and determination of perspectives of their management for provision of maximization of effectiveness of university education by the example of modern Russia. Design/methodology/approach The authors define the notion and sense of effectiveness of university education under the conditions of market economy, conduct theoretical review, classify factors which facilitate the increase of effectiveness of university education, and conduct regression and correlation analyses of influence of various factors on effectiveness of university education. Findings As a result of the research, the authors come to the conclusion that the volume of financing of science is not a factor of efficiency of scientific activities of Russian universities; the most important factors of effectiveness of university education are the number of universities and quantity of academic staff. Perspectives of provision of maximization of university education effectiveness in modern Russia are related to management of human capital – academic staff of universities – and finding a balance of quantitative growth and increase of quality of university education. Practical implications Practical significance of the conducted research consists in the fact that its results could be used during development and conduct of the state policy for the management of effectiveness of the system of university education in modern Russia. Originality/value The research has high theoretical significance, as it contributes to the development of the concept of effectiveness and understanding of foundations of management of the system of university education under the conditions of market economy.

Maximizing agreement on diverse ontologies with “wisdom of crowds” relation classification

2014 ◽  
Vol 38 (5) ◽  
pp. 616-633 ◽  
Author(s):  
Maayan Zhitomirsky-Geffet ◽  
Eden Shalom Erez
Keyword(s):  
Cultural Heritage ◽  
Design Methodology ◽  
Shared Knowledge ◽  
Data Sets ◽  
Wisdom Of Crowds ◽  
Content Type ◽  
Limited Size ◽  
Relation Classification ◽  
Practical Implications

Purpose – Ontologies are defined as consensual formal conceptualisation of shared knowledge. However, the explicit overlap between diverse ontologies is usually very low since they are typically constructed by different experts. Hence, the purpose of this paper is to suggest to exploit “wisdom of crowds” to assess the maximal potential for inter-ontology agreement on controversial domains. Design/methodology/approach – The authors propose a scheme where independent ontology users can explicitly express their opinions on the specified set of ontologies. The collected user opinions are further employed as features for machine classification algorithm to distinguish between the consensual ontological relations and the controversial ones. In addition, the authors devised new evaluation methods to measure the reliability and accuracy of the presented scheme. Findings – The accuracy of the relation classification (90 per cent) and the reliability of user agreement annotations were quite high (over 90 per cent). These results indicate a fair ability of the scheme to learn the maximal set of consensual relations out of the specified set of diverse ontologies. Research limitations/implications – The data sets and the group of participants in our experiments were of limited size and thus the presented results are promising but cannot be generalised at this stage of research. Practical implications – A diversity of opinions expressed by different ontologies has to be resolved in order to digitise many domains of knowledge (e.g. cultural heritage, folklore, medicine, economy, religion, history, art). This work presents a methodology to formally represent this diverse knowledge in a rich semantic scheme where there is a need to distinguish between the commonly shared and the controversial relations. Originality/value – To the best of the knowledge this is a first proposal to consider crowd-based evaluation and classification of ontological relations to maximise the inter-ontology agreement.

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