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Article
Publication date: 20 April 2010

Hamid R. Jamali and Saeid Asadi

This paper aims to demonstrate the role that the Google general search engine plays in the information‐seeking behaviour of scientists, particularly physicists and astronomers.

4840

Abstract

Purpose

This paper aims to demonstrate the role that the Google general search engine plays in the information‐seeking behaviour of scientists, particularly physicists and astronomers.

Design/methodology/approach

The paper is based on a mixed‐methods study including 56 semi‐structured interviews, a questionnaire survey of 114 respondents (47 per cent response rate) and the use of information‐event cards to collect critical incident data. The study was conducted at the Department of Physics and Astronomy at University College, London.

Findings

The results show that Google is the tool most used for problem‐specific information seeking. The results also show the growing reliance of scientists on general search engines, particularly Google, for finding scholarly articles. Initially, finding scholarly articles was a by‐product of general searching for information rather than focused searches for papers. However, a growing number of articles read by scientists are identified through the Google general search engine and, as scientists are becoming more aware of the quantity of scholarly papers searchable by Google, they are increasingly relying on Google for finding scholarly literature.

Research limitations/implications

As the only fields covered in the study were physics and astronomy, and the research participants were sourced from just one department of one institution, caution should be taken in generalising the findings.

Originality/value

The data are based on a mixed‐methods in‐depth study of scientists' information‐seeking behaviour which sheds some light on a question raised in past studies relating to the reason for the high number of articles identified through Google.

Details

Online Information Review, vol. 34 no. 2
Type: Research Article
ISSN: 1468-4527

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Article
Publication date: 16 November 2010

Hamid R. Jamali, Fatemeh Nooshinfard, Golizeh Baghestani and Saeid Asadi

This paper aims to evaluate the use and the costs of AMIN, the interlibrary loan service in Iran.

489

Abstract

Purpose

This paper aims to evaluate the use and the costs of AMIN, the interlibrary loan service in Iran.

Design/methodology/approach

A questionnaire was used for the data collection. It was completed by those librarians in charge of AMIN in academic libraries.

Findings

The statistics collected from six libraries showed that 514 items were loaned, of which 49 per cent were journal articles and 43 per cent were books. Post was used for the delivery of about 55 per cent of the items, while e‐mail was used for the delivery of only 7 per cent of the items. The average time spent dealing with each request (the time lapse between receipt of the request and dispatching the item) was about 7.1 days. The library of the University of Tehran was the most effective library in this regard as it only took 3.4 days on average for each request. The study revealed that the participating libraries did not have a proper procedure in place for collecting usage statistics and therefore one cannot evaluate the effectiveness of the AMIN service.

Originality/value

The paper reveals the cost of document supply in Iranian academic libraries and illustrates that ILL services in Iran are not efficient and that measures could be taken to reduce the cost and increase the efficiency of services.

Details

Interlending & Document Supply, vol. 38 no. 4
Type: Research Article
ISSN: 0264-1615

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Article
Publication date: 5 July 2013

Saeid Asadi, Shadi Ghafghazi and Hamid R. Jamali

The purpose of this paper is to investigate how Wikipedians are motivated, or discouraged, to contribute to Farsi (Persian) Wikipedia.

626

Abstract

Purpose

The purpose of this paper is to investigate how Wikipedians are motivated, or discouraged, to contribute to Farsi (Persian) Wikipedia.

Design/methodology/approach

In this grounded theory study, face‐to‐face semi‐structured interviews were conducted with a sample of 15 active users of Persian Wikipedia. The interviews then were transcribed and coded using Strauss and Corbin's method which included constant comparison of data.

Findings

Editing and writing incentives, as well as deterrents, were extracted from the data. Findings indicated that motivating factors can be classified into two categories of internal and external. Internal motivations could be individual or cognitive motivations or be related to Wikipedia structure. Also, some factors such as permanent access to the internet can be considered as external motivations for contribution to Wikipedia. On the other hand, content production and improvement of Wikipedia in local language was the strongest reason for contribution; entertainment was the weakest motivation. Positive feedback from other users can be the strongest factor that encourages users to stay in Wikipedia and continue their contribution.

Originality/value

This is the first study on Persian Wikipedia and one of the few qualitative studies on Wikipedia. It proposes a new categorization of encouraging and discouraging factors for Wikipedians.

Details

Library Review, vol. 62 no. 4/5
Type: Research Article
ISSN: 0024-2535

Keywords

Available. Content available
Article
Publication date: 17 February 2012

271

Abstract

Details

Online Information Review, vol. 36 no. 1
Type: Research Article
ISSN: 1468-4527

Available. Content available
Article
Publication date: 5 July 2013

Judith Broady-Preston

156

Abstract

Details

Library Review, vol. 62 no. 4/5
Type: Research Article
ISSN: 0024-2535

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Article
Publication date: 27 August 2024

Maryam Asadi, Gholamreza Mansourfar, Saeid Homayoun and Hamzeh Didar

This paper aims to investigate how integrated reporting quality (IRQ), as well as comprehensive disclosure score (CDS) (i.e. incorporating integrated and sustainable reporting…

278

Abstract

Purpose

This paper aims to investigate how integrated reporting quality (IRQ), as well as comprehensive disclosure score (CDS) (i.e. incorporating integrated and sustainable reporting quality), impacts value creation differently between companies operating under mandatory versus voluntary adoption of these reporting frameworks.

Design/methodology/approach

The sample comprises 1,195 firm-year observations (international data set) from 2018 to 2022, which are divided into groups based on mandatory vs voluntary adoption of the international integrated reporting framework (IIRF) and Sustainability Accounting Standards Board (SASB). Furthermore, regression analysis is used in the analyses.

Findings

The findings revealed a significant and positive relationship between IRQ and value creation on a global scale. In addition, unlike voluntary adoption of the IIRF, mandatory adoption of it showed a significant and positive relationship between IRQ and value creation. Furthermore, an increase in the CDS had a greater impact on value creation compared to IRQ. Finally, in contrast to companies with voluntary adoption of both IIRF and SASB, companies with mandatory adoption of them exhibited a significant and positive relationship between these reports and value creation.

Practical implications

The findings have practical implications for various stakeholders. First, by enhancing the awareness and understanding of integrated reporting and sustainability reporting among users, these results can facilitate more informed economic decision-making and enable a more accurate assessment of a company's potential for value creation. Second, these findings can contribute to the development of more effective and tailored reporting guidelines that align with the nuances of value creation dynamics in different contexts. Ultimately, this research can lead to improvements in reporting practices and regulatory frameworks, benefiting both companies and their stakeholders.

Social implications

The study's social implications are significant as it offers insights into the global debate surrounding the adoption of the IIRF and the objectives of the merger involving the Value Reporting Foundation and the International Financial Reporting Standards Foundation. The findings provide a concrete basis for evaluating the value of adopting the IIRF and inform discussions on the future of reporting standards and practices.

Originality/value

Furthermore, it stands as one of the pioneering endeavors to investigate the value creation aspects of CDS. These unique aspects make a substantive contribution by expanding the frontiers of knowledge in the realm of corporate reporting and financial implications, offering novel insights and opportunities for further research in this crucial domain.

Details

Journal of Accounting & Organizational Change, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1832-5912

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Article
Publication date: 14 August 2023

Sajjad Habashi Youvalari, Arash Olianezhad and Saeid Afrang

The purpose of this paper is to design and simulate a piezoelectric micropump using microelectromechanical systems technology for drug delivery applications.

336

Abstract

Purpose

The purpose of this paper is to design and simulate a piezoelectric micropump using microelectromechanical systems technology for drug delivery applications.

Design/methodology/approach

Two piezoelectric actuators are used to actuate and bend the diaphragms in the proposed structure. In this micropump, the liquid flow is rectified by two silicon check valves.

Findings

The use of two piezoelectric transducer (PZT) actuators in the parallel mod not only reduces dead volume but also increases stroke volume as well. In addition to increasing the flow rate, this phenomenon enhances the operation of the micropump to have self-priming as smoothly as possible.

Originality/value

This actuating method results in a 22% increase in flow rate and compression ratio, as well as a 15% reduction in function voltage. The fluid-solid interaction is simulated using COMSOL Multiphysics 5.3a.

Details

Sensor Review, vol. 43 no. 5/6
Type: Research Article
ISSN: 0260-2288

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Article
Publication date: 29 January 2021

Daryoush Kamali, Saeid Hejri, Narges Akbar and Emad Hasani Malekshah

The purpose of this study is to present a comprehensive hydrothermal analysis on an inclined mini-channel using numerical and experimental techniques. The fin array acts as heat…

212

Abstract

Purpose

The purpose of this study is to present a comprehensive hydrothermal analysis on an inclined mini-channel using numerical and experimental techniques. The fin array acts as heat source within the channel, and a wavy wall located at the top of the channel is heat sink. The side walls are insulated with curved profiles. Also, the channel is inclined with four known inclination angles. To solve the governing equations, the dual-multi-relaxation-time lattice Boltzmann method with D2Q9 and D2Q5 lattice models for flow and temperature fields is used, respectively. Also, the channel is filled with SiO2-glycol nanofluid.

Design/methodology/approach

Identifying the behavior of a thermal component during natural convective flow is a challenging topic due to its complexities. This paper focuses on analyzing the thermal and hydrodynamic aspects of a narrow channel equipping with fin array.

Findings

Two correlations are proposed considering temperature and volume fraction ranges for thermal conductivity and dynamic viscosity according to measured experimental data which are used in the numerical phase. Finally, the structure of flow, temperature distribution of fluid, local thermal and viscous dissipations, volume-averaged entropy production, Bejan number and heat transfer rate are extracted by numerical simulations. The results show that the average Nusselt number enhances about 57% (maximum enhancement percentage) when volume fraction increases from 1% to 3% at Ra = 106 and θ = 90°. In addition, the value of entropy generation is maximum at φ = 1%, Ra = 106 and φ = 90°. Also, the maximum enhancement of entropy generation in range of Ra = 103 to 106 is about 4 times at φ = 1% and θ = 90°.

Originality/value

The originality of the present study is combining a modern numerical method (i.e. dual/multi-relaxation-time LBM) with experimental observation on characteristics of SiO2-glycol nanofluid to study the thermal and hydrodynamic properties of the studied mini-channel.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 31 no. 7
Type: Research Article
ISSN: 0961-5539

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Article
Publication date: 14 July 2022

Mohamed Ouni, Fatih Selimefendigil, Besbes Hatem, Lioua Kolsi and Mohamed Omri

The purpose of this study is to analyze the impacts of combined utilization of multi-jet impinging cooling of nanofluids with magnetic field and porous layer on the cooling…

128

Abstract

Purpose

The purpose of this study is to analyze the impacts of combined utilization of multi-jet impinging cooling of nanofluids with magnetic field and porous layer on the cooling performance, as effective cooling with impinging jets are obtained for various energy systems, including photovoltaic panels, electronic cooling and many other convective heat transfer applications.

Design/methodology/approach

Finite element method is used to explore the magnetic field effects with the inclusion of porous layer on the cooling performance efficiency of slot nanojet impingement system. Impacts of pertinent parameters such as Reynolds number (Re between 250 and 1,000), strength of magnetic field (Ha between 0 and 30), permeability of the porous layer (Da between 0.001 and 0.1) on the cooling performance for flat and wavy surface configurations are explored.

Findings

It is observed that the average Nusselt number (Nu) rises by about 17% and 20.4% for flat and wavy configuration while temperature drop of 4 K is obtained when Re is increased to 1,000 from 250. By using magnetic field at the highest strength, the average Nu rises by about 29% and 7% for flat and wavy cases. Porous layer permeability is an effective way of controlling the cooling performance while up to 44.5% variations in the average Nu is obtained by varying its value. An optimization routine is used to achieve the highest cooling rate while the optimum parameter set is obtained as (Re, Ha, Da, γ, sx) = (1,000, 30, 0.07558, 86.28, 2.585) for flat surface and (Re, Ha, Da, γ, sx) = (1,000, 30, 0.07558, 71.85, 2.329) for wavy surface configurations.

Originality/value

In thermal systems, cooling system design is important for thermal management of various energy systems, including fuel cells, photovoltaic panels, electronic cooling and many others. Impinging jets are considered as effective way of cooling because of its ability to give higher local heat transfer coefficients. This paper offers novel control tools, such as magnetic field, installation of porous layer and hybrid nano-liquid utilization for control of cooling performance with multiple impinging jets.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 33 no. 1
Type: Research Article
ISSN: 0961-5539

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Article
Publication date: 28 July 2023

Amit Kumar, Abhipsa P. Dash, Atul Kumar Ray, Priyabrata Sethy and Idamakanti Kasireddy

This study aims to examine the flow of unsteady mixed convective hybrid nanofluid over a rotating sphere with heat generation/absorption. The hybrid nanofluid contains different…

111

Abstract

Purpose

This study aims to examine the flow of unsteady mixed convective hybrid nanofluid over a rotating sphere with heat generation/absorption. The hybrid nanofluid contains different shapes of nanoparticles (copper [Cu] and aluminium oxide [Al2O3]) in the base fluid (water [H2O]). The influence of different shapes (sphere, brick, cylinder, platelets and blades) of nanoparticle in water-based hybrid nanofluid is also investigated.

Design/methodology/approach

To analyse the nanomaterial, the flow model is established, and in doing so, the Prandtl’s boundary layer theory is incorporated into the present model. The bvp4c approach, i.e. finite difference method, is used to find the numerical solution of differential equations that is controlling the fluid flow. The effect of relevant flow parameters on nanofluid temperature and velocity profile is demonstrated in detailed explanations using graphs and bar charts, whereas numerical results for Nusselt number and the skin’s coefficient for various form parameters are presented in tabular form.

Findings

The rate of heat transfer is least for spherical-shaped nanoparticle because of its smoothness, symmetricity and isotropic behaviour. The rate of heat transfer is highest for blade-shaped nanoparticles as compared to other shapes (brick, cylindrical and platelet) of nanoparticles because the blade-shaped nanoparticles causes comparatively more turbulence flow in the nanofluid than other shapes of nanoparticle. Heat generation affects the temperature distribution and, hence, the particle deposition rate. The absorption of heat extracts heat and reduce the temperature across the rotating sphere. The heat generation/absorption parameter plays an important role in establishing and maintaining the temperature around the rotating sphere.

Research limitations/implications

The numerical study is valid with the exception of the fluctuation in density that results in the buoyancy force and the functional axisymmetric nanofluid transport has constant thermophysical characteristics. In addition, this investigation is also constrained by the assumptions that there is no viscosity dissipation, no surface slippage and no chemically activated species. The hybrid nanofluid Al2O3–Cu/H2O is an incompressible and diluted suspension. The single-phase hybrid nanofluid model is considered in which the relative velocity of water (H2O) and hybrid nanoparticles (Al2O3–Cu) is the same and they are in a state of thermal equilibrium.

Practical implications

Study on convective flow across a revolving sphere has its applications found in electrolysis management, polymer deposition, medication transfer, cooling of spinning machinery segments, spin-stabilized missiles and other industrial and technical applications.

Originality/value

The originality of the study is to investigate the effect of shape factor on the flow of electrically conducting hybrid nanofluid past a rotating sphere with heat generation/absorption and magnetic field. The results are validated and provide extremely positive balance with the recognised articles. The results of the study provide many appealing applications that merit further study of the problem.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 33 no. 11
Type: Research Article
ISSN: 0961-5539

Keywords

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