Search results

1 – 10 of 427
To view the access options for this content please click here
Article
Publication date: 30 November 2020

Khushairi Amri Kasim, Shabudin Mat, Iskandar Shah Ishak and Shuhaimi Mansor

This study aims to investigate the effects of propeller locations on the aerodynamic characteristics of a generic 55° swept angle sharp-edged delta wing unmanned aerial…

Abstract

Purpose

This study aims to investigate the effects of propeller locations on the aerodynamic characteristics of a generic 55° swept angle sharp-edged delta wing unmanned aerial vehicle (UAV) model.

Design/methodology/approach

A generic delta-winged UAV model has been designed and fabricated to investigate the aerodynamic properties of the model when the propeller is placed at three different locations. In this research, the propeller has been placed at three different positions on the wing, namely, front, middle and rear. The experiments were conducted in a closed-circuit low-speed wind tunnel at speeds of 20 and 25 m/s corresponding to 0.6 × 106 and 0.8 × 106 Reynolds numbers, respectively. The propeller speed was set at constant 6,000 RPM and the angles of attack were varied from 0° to 20° for all cases. During the experiment, two measurement techniques were used on the wing, which were the steady balance measurement and surface pressure measurement.

Findings

The results show that the locations of the propeller have significant influence on the lift, drag and pitching moment of the UAV. Another important observation obtained from this study is that the location of the propeller can affect the development of the vortex and vortex breakdown. The results also show that the propeller advance ratio can also influence the characteristics of the primary vortex developed on the wing. Another main observation was that the size of the primary vortex decreases if the propeller advance ratio is increased.

Practical implications

There are various forms of UAVs, one of them is in the delta-shaped planform. The data obtained from this experiment can be used to understand the aerodynamic properties and best propeller locations for the similar UAV aircrafts.

Originality/value

To the best of the author’s knowledge, the surface pressure data available for a non-slender delta-shaped UAV model is limited. The data presented in this paper would provide a better insight into the flow characteristics of generic delta winged UAV at three different propeller locations.

Details

Aircraft Engineering and Aerospace Technology, vol. 93 no. 1
Type: Research Article
ISSN: 1748-8842

Keywords

To view the access options for this content please click here
Article
Publication date: 15 February 2011

Emmanuel E. Baro, Benake‐ebide C. Endouware and Janet O. Ubogu

The aim of this paper is to investigate whether undergraduate students in the College of Health Sciences in Niger Delta University are information literate, and to…

Abstract

Purpose

The aim of this paper is to investigate whether undergraduate students in the College of Health Sciences in Niger Delta University are information literate, and to determine whether they are aware of and use different information resources including electronic ones, and to assess their ability to evaluate information before use.

Design/methodology/approach

Questionnaire and interview methods were used to collect data from the students.

Findings

The students mostly rely on textbooks, medical journals, the internet, colleagues, and the Nigerian National University Commission's virtual library for information. They rarely use electronic resources such as MEDLINE, HINARI, the Cochrane Library, and EbscoHost. This could be because of a lack of awareness and skills necessary to search databases. Problems such as lack of time, the challenge of locating “good citable stuff”, inability to use effectively the medical library, and poor skills in information searching were mentioned. The study recommends that medical librarians and faculty should collaborate in integrating information literacy skills into the medical school curriculum.

Originality/value

This paper may help inform discussion about students' competences for locating, selecting, evaluating and using information essential for lifelong learning.

Details

Program, vol. 45 no. 1
Type: Research Article
ISSN: 0033-0337

Keywords

Content available
Book part
Publication date: 27 November 2020

Arthur Seakhoa-King, Marcjanna M Augustyn and Peter Mason

Abstract

Details

Tourism Destination Quality
Type: Book
ISBN: 978-1-83909-558-0

To view the access options for this content please click here
Article
Publication date: 25 October 2011

S.I. Lao, K.L. Choy, G.T.S. Ho, Y.C. Tsim and C.K.H. Lee

With the increasing concerns about food management, attention is placed on the monitoring of different potential risk factors for food handling. Therefore, the purpose of…

Abstract

Purpose

With the increasing concerns about food management, attention is placed on the monitoring of different potential risk factors for food handling. Therefore, the purpose of this paper is to propose a system that helps facilitate and improve the quality of decision making, reduces the level of substandard goods, and facilitates data capturing and manipulation, to help a warehouses improve quality assurance in the inventory‐receiving process with the support of technology.

Design/methodology/approach

This system consists of three modules, which integrate the radio frequency identification (RFID) technology, case‐based reasoning (CBR), and fuzzy reasoning (FR) technique to help monitor food quality assurance activities. In the first module, the data collection module, raw warehouse and work station information are collected. In the second module, the data sorting module, the collected data are stored in a database. In this module, data are decoded, and the coding stored in the RFID tags are transformed into meaningful information. The last module is the decision‐making module, through which the operation guidelines and optimal storage conditions are determined.

Findings

To validate the feasibility of the proposed system, a case study was conducted in food manufacturing companies. A pilot run of the system revealed that the performance of the receiving operation assignment and food quality assurance activities improved significantly.

Originality/value

In summary, the major contribution of this paper is to develop an effective infrastructure for managing food‐receiving process and facilitating decision making in quality assurance. Integrating CBR and FR techniques to improve the quality of decision making on food inventories is an emerging idea. The system development roadmap demonstrates the way to future research opportunities for managing food inventories in the receiving operations and implementing artificial intelligent techniques in the logistics industry.

Details

Journal of Manufacturing Technology Management, vol. 22 no. 8
Type: Research Article
ISSN: 1741-038X

Keywords

To view the access options for this content please click here
Article
Publication date: 27 April 2010

Hamid Assilzadeh and Yang Gao

This paper seeks to illustrate designation of a real‐time oil spill monitoring and management system using computer system, GIS models, internet and a variety of other…

Abstract

Purpose

This paper seeks to illustrate designation of a real‐time oil spill monitoring and management system using computer system, GIS models, internet and a variety of other technologies.

Design/methodology/approach

Appropriate models in GIS, together with monitoring technologies and internet‐based communication infrastructure, facilitate oil spill early warning, situational analysis, risk analysis and damage analysis in addition to management and disaster response in real‐time. The system architect includes command and control module, designed for managing and coordinating oil spill accidents response. The structure also includes an accident data dissemination scheme, through an internet portal which distributes disaster thematic products and facilitates communication between oil spill disaster players and the administration office.

Findings

The functionality of such a system through its components including database, central repository, disaster models, command and control and communication schemes covers all the stages of spill management before, during, and after an accident.

Originality/value

The system acts as a single umbrella of control and administration for efficient and effective oil spill accident management and enhances oil spill accident early warning and alert mechanisms. The system will also enhance decision supports for quick emergency responses and improve real‐time communication and information sharing between responsible agencies.

Details

Disaster Prevention and Management: An International Journal, vol. 19 no. 2
Type: Research Article
ISSN: 0965-3562

Keywords

To view the access options for this content please click here
Article
Publication date: 15 June 2020

James Burton

This paper argues that policymakers and academics should place more emphasis on maximising the additional benefit created by entrepreneurial support programs and impact…

Abstract

Purpose

This paper argues that policymakers and academics should place more emphasis on maximising the additional benefit created by entrepreneurial support programs and impact investments. It demonstrates a robust approach to advancing this field of research by using qualitative methods to determine the variables that may predict the additional benefit a firm will gain from funding.

Design/methodology/approach

The research is based on 60 semi-structured interviews averaging 1.5 h each; 45 with entrepreneurs that did or did not receive funding from a business plan competition in Nigeria, 15 with relevant elites. Detailed World Bank panel data on program participants further validated responses and supported conclusions.

Findings

Numerous factors that may explain additional benefit were uncovered, including those that vary the need for external funding and those that vary access to it.

Research limitations/implications

Qualitative methods explored variables previously assumed to be unobservable. Future studies are necessary to test the results quantitatively.

Social implications

Understanding the characteristics that indicate ex ante which firms would most benefit from support will help policymakers, impact investors and development institutions to more effectively allocate capital.

Originality/value

This paper addresses the paucity of research into increasing additional impact and demonstrates the value of pursuing it. Methods used to suggest additionality variables for such programs and many of the factors highlighted are unique to this study. The research is also based on unique access to the participants and un-anonymised data from a significant World Bank study, and on substantially more interviews than previous papers.

Details

Journal of Entrepreneurship and Public Policy, vol. 9 no. 3
Type: Research Article
ISSN: 2045-2101

Keywords

To view the access options for this content please click here
Article
Publication date: 3 January 2017

Mojtaba Tahani, Mehran Masdari and Ali Bargestan

This paper aims to investigate the aerodynamic characteristics as well as static stability of wing-in-ground effect aircraft. The effect of geometrical characteristics…

Abstract

Purpose

This paper aims to investigate the aerodynamic characteristics as well as static stability of wing-in-ground effect aircraft. The effect of geometrical characteristics, namely, twist angle, dihedral angle, sweep angle and taper ratio are examined.

Design/methodology/approach

A three-dimensional computational fluid dynamic code is developed to investigate the aerodynamic characteristics of the effect. The turbulent model is utilized for characterization of flow over wing surface.

Findings

The numerical results show that the maximum change of the drag coefficient depends on the angle of attack, twist angle and ground clearance, in a decreasing order. Also, it is found that the lift coefficient increases as the ground clearance, twist angle and dihedral angle decrease. On the other hand, the sweep angle does not have a significant effect on the lift coefficient for the considered wing section and Reynolds number. Also, as the aerodynamic characteristics increase, the taper ratio befits in trailing state.

Practical implications

To design an aircraft, the effect of each design parameter needs to be estimated. For this purpose, the sensitivity analysis is used. In this paper, the influence of all parameter against each other including ground clearance, angle of attack, twist angle, dihedral angle and sweep angle for the NACA 6409 are investigated.

Originality/value

As a summary, the contribution of this paper is to predict the aerodynamic performance for the cruise condition. In this study, the sensitivity of the design parameter on aerodynamic performance can be estimated and the effect of geometrical characteristics has been investigated in detail. Also, the best lift to drag coefficient for the NACA 6409 wing section specifies and two types of taper ratios in ground effect are compared.

Details

Aircraft Engineering and Aerospace Technology, vol. 89 no. 1
Type: Research Article
ISSN: 1748-8842

Keywords

To view the access options for this content please click here
Article
Publication date: 11 November 2020

Fadi Abdel Muniem Abdel Fattah, Abdul Hakim H.M Mohamed, Mohamed Izzeldin A. Bashir and Abrar Mohammed Mubarak Al Alawi

This paper aims to investigate how students’ attitude (SA), students’ subjective norms (SN), students’ knowledge sharing intentions (KSI) can contribute to the enhancement…

Abstract

Purpose

This paper aims to investigate how students’ attitude (SA), students’ subjective norms (SN), students’ knowledge sharing intentions (KSI) can contribute to the enhancement of knowledge sharing behaviour (KSB) among students at higher education institutes (HEI) in Oman.

Design/methodology/approach

This study follows the quantitative methodology and the deductive causal research approach. The data were conveniently collected through a Web-based questionnaire (Google forms) from 285 active students who are affiliated to Omani universities. SPSS was used to statistically analyse the collected data, including partial least square-structural equation modelling (PLS-SEM V3.3) to draw the results.

Findings

The study concluded that SA has both direct and indirect positive impact on SN, KSI and KSB. Moreover, the result revealed that there is a mediation effect between SA and KSB through KSI, SA and KSI when SN is playing as a mediation role.

Research limitations/implications

Although this study contributes to the existing body of knowledge, this study is limited by the scarcity of the related literature in the Omani context. It is recommended that these shortfalls be addressed together while improving the knowledge-sharing behaviour among students and administrative staff. Furthermore, the potential variation between academic staff and students in terms of factors affecting their intentions to share knowledge within HEIs should be explored.

Practical implications

This research provides policymakers in academic fields with the appropriate approaches to leverage the knowledge-sharing behaviour amongst Omani students with the understanding of the main factors affecting individuals’ knowledge-sharing behaviours.

Social implications

This will help in improving the means of employing and practising knowledge-sharing strategies within HEIs, which can generate competitive advantages amongst students and institutions while benefiting knowledge management strategies and its members.

Originality/value

The importance of the study stems from its context being conducted in Oman as a developing country. In addition, this study is one of the initial attempts to investigate KSB by considering SA, SN and KSI and its applicability on HEI in Oman. The findings of the study can serve as inputs to HEI in developing best practices across KSB dimensions and expanding the knowledge-sharing culture amongst HEI’s students in Oman. One of the developed strategies is the spreading of the knowledge-sharing culture among students by positively directing their attitude towards the practices of knowledge exchange.

Details

Global Knowledge, Memory and Communication, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2514-9342

Keywords

To view the access options for this content please click here
Article
Publication date: 9 May 2016

Adam Abdullah

The purpose of this research is to present an Islamic monetary theory of value by analyzing real prices and real money in terms of gold and silver in Egypt from 696 to…

Abstract

Purpose

The purpose of this research is to present an Islamic monetary theory of value by analyzing real prices and real money in terms of gold and silver in Egypt from 696 to 1517, a period of 821 years from the Umayyads to the Abbasids.

Design/methodology/approach

This paper adopts a quantitative empirical investigation derived from a full population of secondary data to deductively evaluate the measure and store of value functions of money, to affirm an Islamic monetary theory of value, which is also inductively researched through a qualitative interpretation of documentary and content analysis of Islamic and numismatic literature.

Findings

The Islamic monetary theory of value leads to an Islamic equation of exchange that reconfirms the outcome of this research, where a high value of money ensures low constant real prices over the long term.

Research limitations/implications

The findings are based on an empirical investigation involving a single price of wheat series as a reasonable proxy for changes in wholesale commodity prices generally, which was successfully adopted by other studies.

Practical implications

The significance for modern monetary policy is that monetary authorities should adopt an Islamic monetary theory of value to achieve genuine monetary and price stability.

Social implications

Through an Islamic equation of exchange, price stability would ensure real economic growth that protects wealth for holders of money due to a stable purchasing power, and combined with Islamic equity finance, more efficiency in allocating investible resources to increase gross domestic product and employment.

Originality/value

The Islamic monetary theory of value ensures that there is no transfer or confiscation of wealth through inflation, which would impart gains to the issuer due to the excessive supply of money in relation to demand.

Details

Humanomics, vol. 32 no. 2
Type: Research Article
ISSN: 0828-8666

Keywords

To view the access options for this content please click here
Article
Publication date: 9 March 2020

Muhammad Khalique, Khushbakht Hina, T. Ramayah and Jamal Abdul Nassir bin Shaari

The main aim of this study was to examine the effect of the components of intellectual capital on the organizational performance of SMEs operating in tourism sector at…

Abstract

Purpose

The main aim of this study was to examine the effect of the components of intellectual capital on the organizational performance of SMEs operating in tourism sector at Azad Jammu and Kashmir Pakistan.

Design/methodology/approach

In this empirical study, survey approach was used and primary data were collected through structured questionnaire. A total of 300 structured questionnaire survey forms were distributed through purposive sampling technique. Two hundred and twenty usable questionnaire survey forms were returned. Six research hypotheses were constructed to achieve the objective of this study. Smart Partial Least Square (PLS) 3 was used to test the proposed research hypotheses.

Findings

The findings showed that two out of six hypotheses were supported. Precisely, customer capital has appeared as one of the most important components of intellectual capital in model. The results showed that the overall intellectual capital has effect on the organizational performance of SMEs. Results shed more light on the effects that the components of intellectual capital have on organizational performance of SMEs, particularly in the context of Pakistan.

Research limitations/implications

This research is limited to SMEs in tourism sector in Pakistan and the data were gathered through questionnaire which used mostly subjective measures. Subsequently, findings may not be applicable to other industries. The research contributes to the development of intellectual capital literature focused on the organizational performance in the perspective of SMEs in emerging economies. Future research needs to reach beyond the boundaries and understand the effect of intellectual capital on the performance of organizations.

Originality/value

This study extended the knowledge about the prominence of intellectual capital and its effect on the organizational performance of SMEs. Moreover, this study identified the level of existence and measurement of the six components of intellectual capital in SMEs which enables practitioners to develop adequate strategies to better manage it. To author's best knowledge, this study can be the first empirical study which investigates the impact of intellectual capital on the organizational performance of SMEs operating in tourism sector in Pakistan.

Details

Journal of Intellectual Capital, vol. 21 no. 3
Type: Research Article
ISSN: 1469-1930

Keywords

1 – 10 of 427