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Article
Publication date: 11 October 2019

Syam Narayanan S., Asad Ahmed R., Jijo Philip Varghese, Gopinath S., Jedidiah Paulraj and Muthukumar M.

The purpose of this paper is to experimentally analyze the effect of wing shape of various insects of different species in a flapping micro aerial vehicle (MAV).

199

Abstract

Purpose

The purpose of this paper is to experimentally analyze the effect of wing shape of various insects of different species in a flapping micro aerial vehicle (MAV).

Design/methodology/approach

Six different wings are fabricated for the MAV configuration, which is restricted to the size of 15 cm length and width; all wings have different surface area and constant span length of 6 cm. The force is being measured with the help of a force-sensing resistor (FSR), and the coefficients of lift were calculated and compared.

Findings

This study shows that the wing “Tipula sp” has better value of lift than other insect wings, except for the negative angle of attacks. The wing “Aeshna multicolor” gives the better values of lift in negative angles of attack.

Practical implications

This paper lays the foundation for the development of flapping MAVs with the insect wings. This type of wing can be used for spying purpose in the military zone and also can be used to survey remote and dangerous places where humans cannot enter.

Originality/value

This paper covers all basic insect wing configurations of different species with exact mimics of the veins. As the experimental investigation was carried for different angle of attacks, velocities and flapping frequencies, this paper can be used as reference for future flapping wing MAV developers.

Details

Aircraft Engineering and Aerospace Technology, vol. 92 no. 2
Type: Research Article
ISSN: 1748-8842

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Article
Publication date: 7 January 2022

Syam Narayanan S. and Asad Ahmed R.

The purpose of this study is to experimentally analyse the effect of flexible and stiffened membrane wings in the lift generation of flapping micro air vehicle (MAV).

144

Abstract

Purpose

The purpose of this study is to experimentally analyse the effect of flexible and stiffened membrane wings in the lift generation of flapping micro air vehicle (MAV).

Design/methodology/approach

This is analysed by the rectangle wing made up of polyethylene terephthalate sheets of 100 microns. MAV is tested for the free stream velocity of 2 m/s, 4 m/s, 6 m/s and k* of 0, 0.25, 1, 3, 8. This test is repeated for flapping MAV of the free flapping frequency of 2 Hz, 4 Hz, 6 Hz, 10 Hz and 12 Hz.

Findings

This study shows that the membrane wing with proper stiffeners can give better lift generation capacity than a flexible wing.

Research limitations/implications

Only a normal force component is measured, which is perpendicular to the longitudinal axis of the model.

Practical implications

In MAVs, the wing structures are thin and light, so the effect of fluid-structure interactions is important at low Reynold’s numbers. This data are useful for the MAV developments.

Originality/value

The effect of chord-wise flexibility in lift generation is the study of the effect of a flexible wing and rigid wing in MAV. It is analysed by the rectangle wing. The coefficient of normal force at different free stream conditions was analysed.

Details

Aircraft Engineering and Aerospace Technology, vol. 94 no. 5
Type: Research Article
ISSN: 1748-8842

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Article
Publication date: 17 May 2024

Syam Narayanan S., Rajalakshmi Pachamuthu, Alex T. Biju and Srilekha Madupu

This study aims to discuss the mathematical modelling of a compliance-assisted flapping mechanism and morphable structures for an UAV.

81

Abstract

Purpose

This study aims to discuss the mathematical modelling of a compliance-assisted flapping mechanism and morphable structures for an UAV.

Design/methodology/approach

A compliance-assisted flapping wing was designed and modelled mathematically, and signals for the corresponding curves were calculated. The actual wing tip trace of a hummingbird was taken, and variables a, b, h and k were calculated from the image. This data was given to the mathematical model for plotting the graph, and the curve was compared with the input curve. The wing frame and mechanism for control surfaces using morphing is modelled along with single pivoted spine for centre of gravity augmentation and flight orientation control.

Findings

The model efficiently approximates the 2D path of the wing using line segments using the muscle and compliance mechanism.

Practical implications

Using a compliance-assisted flapping mechanism offers practical advantages. It allows us to synchronize the flapping frequency with the input signal frequency, ensuring efficient operation. Additionally, the authors can enhance the torque output by using multiple muscle strands, resulting in a substantial increase in the system’s torque-to-weight ratio. This approach proves to be more favourable when compared to conventional methods involving motors or servos, ultimately offering a more efficient and robust solution for practical application.

Social implications

This model focuses on creating a flexible and tunable mechanism that can at least trace four types of wing traces from the same design, for shifting from one mode of flight to another.

Originality/value

Conventional ornithopter flapping mechanisms are gear or servo driven and cannot trace a wing tip, but some can trace complicated curves, but only one at a time. This model can trace multiple curves using the same hardware, allowing the user to program the curve based on their needs or bird. The authors may vary the shape of the wing tip trace to switch between forward flight, hovering, backward flying, etc., which is not conceivable with any traditional flapping mechanism.

Details

Aircraft Engineering and Aerospace Technology, vol. 96 no. 4
Type: Research Article
ISSN: 1748-8842

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Book part
Publication date: 6 November 2023

Shimaa Mohammad Yousof

A pandemic causes abrupt and unanticipated disruptions in many facets of society. A lot of authorities have quickly turned to online teaching methods. The best methods for online…

Abstract

A pandemic causes abrupt and unanticipated disruptions in many facets of society. A lot of authorities have quickly turned to online teaching methods. The best methods for online teaching have become a hot topic of discussion due to this urgent fast transmission. It was difficult to teach physiology to medical and paramedical students online because of concerns about how to give the students an effective interactive online teaching practice and how to guarantee successful outcomes. Therefore, three approaches have been individually applied to medical and nursing students for the first time in the physiology department of the Faculty of Medicine in Rabigh, King Abdulaziz University. Through online lectures and assignments, the strategies attempted to capture the students’ interest and interaction. The second-year nursing students were given a mind map project to complete after the lecture. The third-year medical students used a crossword puzzle game to test the students’ understanding. The third-year medical students were presented with short stories to better comprehend the physiological processes covered in the lectures. Overall, the three instructional strategies received positive feedback from the students. Incorporating such cutting-edge and imaginative educational approaches, in conclusion, could significantly aid in managing the pressures that arise during pandemics.

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Article
Publication date: 31 August 2022

Mostafa Arasteh, Yegane Azargoon and M.H. Djavareshkian

Ground effect is one of the important factors in the enhancement of wing aerodynamic performance. This study aims to investigate the aerodynamic forces and performance of a…

243

Abstract

Purpose

Ground effect is one of the important factors in the enhancement of wing aerodynamic performance. This study aims to investigate the aerodynamic forces and performance of a flapping wing with the bending deflection angel under the ground effect.

Design/methodology/approach

In this study, the wing and flapping mechanism were designed and manufactured based on the seagull flight and then assembled. It is worth noting that this mechanism is capable of wing bending in the upstroke flight as big birds. Finally, the model was examined at bending deflection angles of 0° and 107° and different distances from the surface, flapping frequencies and velocities in forward flight in a wind tunnel.

Findings

The results revealed that the aerodynamic performance of flapping wings in forward flight improved due to the ground effect. The effect of the bending deflection mechanism on lift generation was escalated when the flapping wing was close to the surface, where the maximum power loading occurred.

Practical implications

Flapping wings have many different applications, such as maintenance, traffic control, pollution monitoring, meteorology and high-risk operations. Unlike fixed-wing micro aerial vehicles, flapping wings are capable of operating in very-low Reynolds-number flow regimes. On the other hand, ground effect poses positive impacts on the provision of aerodynamic forces in the take-off process.

Originality/value

Bending deflection in the flapping motion and ground effect are two influential factors in the enhancement of the aerodynamic performance of flapping wings. The combined effects of these two factors have not been studied yet, which is addressed in this study.

Details

Aircraft Engineering and Aerospace Technology, vol. 95 no. 4
Type: Research Article
ISSN: 1748-8842

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Article
Publication date: 15 January 2021

Waqar Ahmed, Arsalan Najmi, Simonov Kusi-Sarpong, Sharfuddin Ahmed Khan, Asad Khushal and Joseph Quartey

This research aims to propose a framework for measuring customer loyalty for third party logistics (3PL) industry by exploring the attributes that are more attractive to customers…

980

Abstract

Purpose

This research aims to propose a framework for measuring customer loyalty for third party logistics (3PL) industry by exploring the attributes that are more attractive to customers and ascertain the mechanisms for increasing customer loyalty in 3PL industry.

Design/methodology/approach

Data were collected from one hundred and thirty-three (133) respondents who were employees of different industries that outsource 3PL services. The partial least square structural equation modeling (PLS–SEM) was deployed for analysis.

Findings

The results showed that service quality has a significant positive impact on customer orientation, customer satisfaction and relationship quality. On the other hand, customer orientation has been observed to positively impact customer satisfaction but an insignificant impact on customer loyalty and relationship quality. Customer satisfaction has a significant positive impact on relationship quality but an insignificant impact on customer loyalty. Also, relationship quality has a significant positive impact on customer loyalty.

Practical implications

The results recommend that 3PL companies' managers focus more on developing quality relationships with their customers, delivering exemplary service quality and offering customer orientation.

Originality/value

This study will help the stakeholders gain much more understanding and insights on how competitive advantage can be achieved and, consequently, help 3PL become the market leaders.

Details

Benchmarking: An International Journal, vol. 28 no. 6
Type: Research Article
ISSN: 1463-5771

Keywords

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Article
Publication date: 3 April 2017

Amjid Khan, Shamshad Ahmed, Asad Khan and Ghalib Khan

The role of digital library resources (DLRs) in accelerating academic and research productivity has been acknowledged worldwide. The purpose of this study is to empirically…

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Abstract

Purpose

The role of digital library resources (DLRs) in accelerating academic and research productivity has been acknowledged worldwide. The purpose of this study is to empirically explore the use of DLRs as a predictor of satisfaction and research productivity in the context of Pakistan to examine its impact on engineering research productivity.

Design/methodology/approach

Given the research objectives, the most suitable methodology for this study is survey. The tool used for gathering the research data on the frequency of usage, purpose, satisfaction level and impact of DLRs usage on research productivity was questionnaires.

Findings

The findings of this study showed that the frequency of use of DLRs and purposes of DLRs significantly contributed to the research students’ satisfaction and research productivity. In addition, a significant relationship was found between the predictors (DLRs purposes, DLRs frequency) and outcome variables (users’ satisfaction and research productivity). Thus, all five hypotheses are supported. The findings of this study further suggested the provision of information sources by university libraries to support research efforts and make a scientific knowledge-based society in the country. The findings are also significant for Higher Education Commission (HEC) authorities, university library administrators, Library and Information Science professionals/information providers to develop e-resources and formulate effective usage policies through which they could make effective use of DLRs.

Originality/value

The rationale of the present study is to fill the gap by empirically investigating the association of users’ satisfaction and research productivity with two dimensions of DLRs, namely, DLRs usage frequency and purposes of DLRs usage.

Details

Collection Building, vol. 36 no. 2
Type: Research Article
ISSN: 0160-4953

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Article
Publication date: 28 November 2019

Muhammad Mujtaba Asad, Razali Bin Hassan, Fahad Sherwani, Irfan Ahmed Rind and Yaser Maiji

This proposed research study aims to focus on the development and implementation of a new safety and health educational management information system (hazard-free production…

550

Abstract

Purpose

This proposed research study aims to focus on the development and implementation of a new safety and health educational management information system (hazard-free production operation [HAZ-PRO]) based on effective hazards controlling factors and mitigating measures for safe onshore and offshore oil and gas drilling operation in Saudi Arabian, Malaysian and Pakistani industries. According to previous studies, there is a sheer industrial need of an effective management information system for decision-making to prevent life-threatening accidents at oil and gas production sites based on innovative hazard controlling strategies from different production origins. Similarly, that safety and health management information system will also enhance the decision-making skills of oil and gas production crew through effective accident prevention strategies.

Design/methodology/approach

In this study, 100 drilling crew are randomly selected for quantitative research phase. Similarly, 3 safety experts are purposively selected for qualitative research from each drilling domain from Saudi Arabia, Malaysia and Pakistan, whereas for the identification of hazard controlling measures, what-if analysis and thematic analysis approaches are adopted. Furthermore, the educational management information system (HAZ-PRO) for safety and health has been developed by using ADDIE Model based. Whereas, Visual Studio (2017) and MySQL software are used for the database and user interface development of the safety and health management information system for the safety and health of production crew.

Findings

This study proposes the research framework for the development and implementation of a new safety and health educational management information system (HAZ-PRO) based on identified effective hazard controls and mitigating measures in support of accident prevention and effective decision-making in hazardous events at Saudi Arabian and Pakistani onshore and offshore production domains. Whereas, this proposed safety and health management information system will assist and facilitate the safety professionals and production crew to prevent the injuries in hazardous work environments of onshore and offshore oil and gas industries according to international safety standards.

Practical implications

This safety and health management information system can be utilized by oil and gas industries (oil and gas production crew) in Saudi Arabia, Malaysia and Pakistan for accident prevention and suitable decision-making prior to the actual onshore and offshore operations. Also, the proposed system development framework will be useful as an effective source for the elimination of life-threatening drilling hazards associated with its activities in oil and gas industries. Similarly, the proposed framework can also be implemented in other oil and gas work-based accident prevention and effective decision-making designs.

Originality/value

This proposed safety and health management information system will be the first system for oil and gas production operation that covers all onshore and offshore operations for Saudi Arabian, Malaysian and Pakistani oil and gas industrial settings. Also, the system development methodology and design framework, which will be used, is novel and unique based on their characteristics and functionalities.

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Book part
Publication date: 9 September 2024

Reham ElMorally

Abstract

Details

Recovering Women's Voices: Islam, Citizenship, and Patriarchy in Egypt
Type: Book
ISBN: 978-1-83608-249-1

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Article
Publication date: 20 January 2020

Necati Aydin

This paper aims to explore the root cause of growing gap in Islamic moral ideals and practices by examining paradigmatic foundation and moral axioms of Islamic business ethics. It…

663

Abstract

Purpose

This paper aims to explore the root cause of growing gap in Islamic moral ideals and practices by examining paradigmatic foundation and moral axioms of Islamic business ethics. It compares and contrasts Tawhidi and secular paradigms in terms of their moral axioms and ethical mandates.

Design/methodology/approach

The paper first presents the paradigmatic foundation of Islamic ethics, namely, ihsan ethics. Second, it compares Tawhidi paradigm of Islam with secular paradigm in respect to their ontological, axiological, anthropological and teleological differences. Third, it links to Islamic moral axioms to the relevant paradigmatic pillars. Fourth, it defines “ihsan ethics” based on Tawhidi paradigm and moral axioms. Finally, it sheds some light on the gap between moral ideals and realities through the theory of ihsan ethics.

Findings

The paper attempts to provide strong conceptual and theoretical tools to understand ethical problems in the Muslim societies. The paper makes a strong case that Muslim minds shall be de-secularized to perceive the reality, truth and telos within Tawhidi worldview. As Muslims reach the level of ihsan by perceiving transcendental reality, they are likely to practice what they preach.

Originality/value

The paper proposes “ihsan ethics” based on Tawhidi worldview and Islamic moral axioms.

Details

Journal of Islamic Accounting and Business Research, vol. 11 no. 2
Type: Research Article
ISSN: 1759-0817

Keywords

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