Search results

1 – 10 of over 3000
Per page
102050
Citations:
Loading...
Access Restricted. View access options
Article
Publication date: 2 March 2015

Noreen Sher Akbar

– The purpose of this paper is to discuss free convection peristaltic flow in an asymmetric channel with nanofluid containing gyrotactic microorganism.

286

Abstract

Purpose

The purpose of this paper is to discuss free convection peristaltic flow in an asymmetric channel with nanofluid containing gyrotactic microorganism.

Design/methodology/approach

The governing equations for proposed model are simplified using “long wavelength and low Reynolds number approximation.” Numerical solutions have been presented for “velocity, pressure gradient, the solid volume fraction nanoparticles, temperature profile and density of motile microorganisms.” The effects of various flow parameters, i.e Hartmann number, the solid volume fraction of the nanoparticles amplitude ratio, Prandtl number, bioconvection Péclet number, bioconvection constant, bioconvection Rayleigh number are presented.

Findings

The author finds that the pressure rise increases with an increase in Hartmann number, Grashof number bioconvection, Rayleigh number and buoyancy ratio in the peristaltic pumping section.

Originality/value

The peristaltic flow nanofluid containing gyrotactic microorganism is explored in the literature for the first time.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 25 no. 2
Type: Research Article
ISSN: 0961-5539

Keywords

Access Restricted. View access options
Article
Publication date: 16 August 2022

Zhao Yuhang, Zhicai Yu, Hualing He and Huizhen Ke

This study aims to fabricate a multifunctional electromagnetic interference (EMI) shielding composite fabric with simultaneous high-efficiency photothermal conversion and Joule…

191

Abstract

Purpose

This study aims to fabricate a multifunctional electromagnetic interference (EMI) shielding composite fabric with simultaneous high-efficiency photothermal conversion and Joule heating performances.

Design/methodology/approach

A multifunctional polypyrrole (PPy) hydrogel/multiwalled carbon nanotube (MWCNT)/cotton EMI shielding composite fabric (hereafter denoted as PHMC) was prepared by loading MWCNT onto tannin-treated cotton fabric, followed by in situ crosslinking-polymerization to synthesize three-dimensional (3D) conductive networked PPy hydrogel on the surface of MWCNT-coated cotton fabric.

Findings

Benefiting from the unique interconnected 3D networked conductive structure of PPy hydrogel, the obtained PHMC exhibited a high EMI-shielding effectiveness vale of 48 dB (the absorbing electromagnetic wave accounted for 84%) within a large frequency range (8.2–12.4 GHz). Moreover, the temperature of the laminated fabric reached 54°C within 900 s under 15 V, and it required more than 100 s to return to room temperature (28.7°C). When the light intensity was adjusted to 150 mW/cm2, the PHMC temperature was about 38.2°C after lighting for 900 s, indicating high-efficiency electro-photothermal effect function.

Originality/value

This paper provides a novel strategy for designing a type of multifunctional EMI shielding composite fabric with great promise for wearable smart garments, EMI shielding and personal heating applications.

Details

Pigment & Resin Technology, vol. 53 no. 2
Type: Research Article
ISSN: 0369-9420

Keywords

Access Restricted. View access options
Article
Publication date: 16 August 2024

Yi-Man Teng, Kun-Shan Wu and Fang-Ju Kuo

COVID-19 halted global tourism, prompting stakeholders to use virtual reality (VR) tourism to maintain interest. Due to technological advancements and wider internet access…

356

Abstract

Purpose

COVID-19 halted global tourism, prompting stakeholders to use virtual reality (VR) tourism to maintain interest. Due to technological advancements and wider internet access globally, VR tourism has become increasingly popular. Guided by the attention-interest-desire-action (AIDA) model and the technology acceptance model (TAM) frameworks, and with the inclusion of personal innovativeness, this study aims to clarify consumer intentions toward engaging with VR tourism by investigating factors such as personal innovativeness, interest, perceived usefulness (PU), perceived ease of use (PEOU), attitude and desire.

Design/methodology/approach

Data was gathered from 252 participants using a cross-sectional approach, with partial least squares structural equation modeling used to assess the research model.

Findings

The findings indicate consumers' personal innovativeness strongly influences VR tourism intention, mediated by PU, attitude and desire. VR tourism intention is also significantly impacted by interest in VR tourism and is mediated by PU and PEOU, attitude and desire. PEOU and PU are significantly linked to interest and determine attitude. Attitude, both directly and indirectly, significantly influences VR tourism intention through users' desire, which mediates the relationship. Through multiple group analysis, the path from desire to intention is found to be moderated by age, education and marital status.

Practical implications

Theoretically, this study pioneers a framework that merges AIDA, TAM and personal innovativeness to advance the understanding of VR tourism adoption dynamics and enrich tourism research. Managerially, it provides valuable guidance on targeting communications and technology toward increasing VR tourism engagement and presents a roadmap for industry practitioners.

Originality/value

This research addresses the identified gaps in extant literature by combining TAM and AIDA with personal innovativeness to investigate the process of consumers' VR tourism intention, triggered by consumers' personal innovativeness and interest in VR tourism. The study highlights significant managerial insights for both tourism industry practitioners and academic researchers, which can assist with decision-making to promote VR tourism development.

研究目的

COVID-19 使全球旅游业停滞不前, 促使利益相关者使用虚拟现实 (VR) 旅游来保持兴趣。由于技术进步和全球互联网接入的增长, VR 旅游变得越来越受欢迎。基于注意-兴趣-渴望-行动模型 (AIDA) 和技术接受模型 (TAM) 框架, 并纳入个人创新性, 本研究旨在通过调查个人创新性、兴趣、感知有用性、感知易用性、态度和渴望等因素, 澄清消费者对参与 VR 旅游的意图。

研究设计/方法论

使用横截面方法收集了252名参与者的数据, 并使用偏最小二乘结构方程建模来评估研究模型。

研究发现

研究结果表明, 消费者的个人创新性通过感知有用性、态度和渴望显著影响 VR 旅游意图。VR 旅游意图也受到对 VR 旅游兴趣的显著影响, 并通过感知有用性、感知易用性、态度和渴望进行调节。感知易用性和感知有用性显著与兴趣相关, 并决定态度。态度通过用户的渴望直接和间接地显著影响 VR 旅游意图, 这些渴望调节了这种关系。通过多群组分析, 发现年龄、教育和婚姻状况对渴望与意图之间的路径具有调节作用。

原创性/价值

本研究通过结合 TAM 和 AIDA 与个人创新性来研究消费者的 VR 旅游意图过程, 填补了现有文献中的空白。本研究强调了对旅游业从业者和学术研究人员的重大管理见解, 这些见解可以帮助决策者推动 VR 旅游的发展。

实践意义

从理论上讲, 本研究开创了一个结合 AIDA、TAM 和个人创新性的框架, 以提升对 VR 旅游采用动态的理解, 并丰富旅游研究。从管理角度来看, 它提供了有价值的指南, 帮助定位通信和技术, 以增加 VR 旅游参与度, 并为行业从业者提供了发展路线图。

Objetivo

El COVID-19 detuvo el turismo global, lo que indujo a las partes implicadas a utilizar el turismo de realidad virtual para mantener el nivel de interés. Debido a los avances tecnológicos y al acceso más amplio a Internet a nivel mundial, el turismo de realidad virtual se ha vuelto cada vez más común. Basándose en el modelo de Atención-Interés-Deseo-Acción (AIDA) y en el modelo de aceptación tecnológica (TAM), y con la inclusión de la innovación personal, este estudio tiene como objetivo comprender las intenciones de los consumidores hacia el compromiso con el turismo de realidad virtual investigando factores como la innovación personal, el interés, la utilidad percibida, la facilidad de uso percibida, la actitud y el deseo.

Diseño/metodología/enfoque

Se recopilaron datos de 252 participantes utilizando un enfoque transversal, y se utilizó la modelización de ecuaciones estructurales de mínimos cuadrados parciales para evaluar el modelo de investigación.

Resultados

Los resultados indican que la innovación personal de los consumidores influye fuertemente en la intención de turismo de realidad virtual mediada por la utilidad percibida, la actitud y el deseo. La intención de turismo de realidad virtual también se ve significativamente afectada por el interés en el turismo de realidad virtual y está mediada por la utilidad percibida y la facilidad de uso percibida, la actitud y el deseo. La facilidad de uso percibida y la utilidad percibida están significativamente relacionadas con el interés y determinan la actitud. La actitud influye tanto directa como indirectamente de manera significativa en la intención de turismo de realidad virtual a través del deseo de los usuarios, que media en la relación. A través del análisis de múltiples grupos, se encontró que la edad, la educación y el estado civil moderan la relación entre el deseo y la intención.

Implicaciones

Desde el punto de vista teórico, este estudio es pionero en la creación de un marco que aúna AIDA, TAM e innovación personal para avanzar en la comprensión de la dinámica de adopción del turismo de realidad virtual y enriquecer la investigación turística. Desde el punto de vista de la gestión, ofrece una valiosa orientación sobre cómo orientar las comunicaciones y la tecnología para aumentar la participación del turismo de realidad virtual y presenta una hoja de ruta para los profesionales del sector.

Originalidad/valor

Esta investigación aborda las lagunas identificadas en la literatura existente mediante la integración de TAM y AIDA con la innovación personal para analizar el proceso de la intención de los consumidores de turismo de realidad virtual, provocada por la innovación personal de los consumidores y el interés en el turismo de realidad virtual. El estudio pone de relieve importantes perspectivas de gestión tanto para los profesionales del sector turístico como para los investigadores académicos, que pueden ayudar en la toma de decisiones para promover el desarrollo del turismo de realidad virtual.

Access Restricted. View access options
Article
Publication date: 26 July 2024

Pianpian Yang, Yufan Jiang, Yuxi Lin, Shuang Geng and Rui Wang

The growing number of firms leveraging social media ads highlight the urgent need for firms to understand social media ads and their effects on consumer perceptions and attitudes…

240

Abstract

Purpose

The growing number of firms leveraging social media ads highlight the urgent need for firms to understand social media ads and their effects on consumer perceptions and attitudes. This research examines whether and how different types of social media ads exert influences on ad engagement and how consumers’ psychological characteristics including regulatory orientation and lay rationalism moderate the influence of social media ads on ad engagement.

Design/methodology/approach

This research conducts three quasi experiments featuring two types of social media ads – interactive and transactional – to collect empirical evidence. Results are analyzed using ANOVA and Process in SPSS.

Findings

This research reveals that interactive ads lead to higher perceived enjoyment and perceived responsiveness, which further lead to higher ad engagement. Promotion focus moderates the effect of social media ads (interactive vs transactional ads) on perceived enjoyment and perceived responsiveness, and lay rationalism moderates the effect on perceived responsiveness, while prevention focus has no such effect.

Originality/value

First, this research establishes the connection between ad types and ad engagement in social media, which offers a new perspective to understand ad engagement. Second, it explores the underlying mechanisms of processing different types of social media ads. Third, it justifies the moderating effects of consumers’ regulatory orientation and lay rationalism on the effects of ad types on ad engagement, providing the first evidence on the moderating role of consumers’ lay rationalism in ad processing. This research helps firm marketers to fine-tune their social media ads according to consumer characteristics.

Details

Industrial Management & Data Systems, vol. 124 no. 10
Type: Research Article
ISSN: 0263-5577

Keywords

Access Restricted. View access options
Article
Publication date: 7 June 2019

Peng Geng and Jianhua Liu

The more precise decision map is important to generate better-fused image. Guided filter can preserve edge information effectively. The purpose of his study is to use guided…

76

Abstract

Purpose

The more precise decision map is important to generate better-fused image. Guided filter can preserve edge information effectively. The purpose of his study is to use guided filter to form the precise decision map and highly informatively fused image.

Design/methodology/approach

The dual tree complex wavelet transform is adopted to decompose the source images into high frequency and low frequency coefficients. Sum of modified Laplacian method is introduced as the focus metric in dual tree complex wavelet coefficients. The guided filter is guided by the dual tree complex wavelet coefficient when the sum of modified Laplacian is used as the input image. The output image of guided filter is used to produce the decision map to fuse dual tree complex wavelet coefficient of source images.

Findings

The sum of modified Laplacian of dual tree complex wavelet coefficient can be used as the guided image in guided filter to generate better decision map. Comparison with the other state-of-the-art methods illustrates that the proposed approach is more effective in fusing the multifocus images both visual performance and objective evaluation.

Originality/value

The sum of modified Laplacian of dual tree complex wavelet coefficient is introduced to be used as the guided image in guided filter to generate better decision map. This method is fast and effect to fuse the source images. Comparison with the other state-of-the-art methods illustrates that the proposed approach is more effective in fusing the multifocus images both visual performance and objective evaluation.

Details

Industrial Robot: the international journal of robotics research and application, vol. 46 no. 3
Type: Research Article
ISSN: 0143-991X

Keywords

Access Restricted. View access options
Article
Publication date: 15 April 2024

Seyed Abbas Rajaei, Afshin Mottaghi, Hussein Elhaei Sahar and Behnaz Bahadori

This study aims to investigate the spatial distribution of housing prices and identify the affecting factors (independent variable) on the cost of residential units (dependent…

68

Abstract

Purpose

This study aims to investigate the spatial distribution of housing prices and identify the affecting factors (independent variable) on the cost of residential units (dependent variable).

Design/methodology/approach

The method of the present study is descriptive-analytical and has an applied purpose. The used statistical population in this study is the residential units’ price in Tehran in 2021. For this purpose, the average per square meter of residential units in the city neighborhoods was entered in the geographical information system. Two techniques of ordinary least squares regression and geographically weighted regression have been used to analyze housing prices and modeling. Then, the results of the ordinary least squares regression and geographically weighted regression models were compared by using the housing price interpolation map predicted in each model and the accurate housing price interpolation map.

Findings

Based on the results, the ordinary least squares regression model has poorly modeled housing prices in the study area. The results of the geographically weighted regression model show that the variables (access rate to sports fields, distance from gas station and water station) have a direct and significant effect. Still, the variable (distance from fault) has a non-significant impact on increasing housing prices at a city level. In addition, to identify the affecting variables of housing prices, the results confirm the desirability of the geographically weighted regression technique in terms of accuracy compared to the ordinary least squares regression technique in explaining housing prices. The results of this study indicate that the housing prices in Tehran are affected by the access level to urban services and facilities.

Originality/value

Identifying factors affecting housing prices helps create sustainable housing in Tehran. Building sustainable housing represents spending less energy during the construction process together with the utilization phase, which ultimately provides housing at an acceptable price for all income deciles. In housing construction, the more you consider the sustainable housing principles, the more sustainable housing you provide and you take a step toward sustainable development. Therefore, sustainable housing is an important planning factor for local authorities and developers. As a result, it is necessary to institutionalize an integrated vision based on the concepts of sustainable development in the field of housing in the Tehran metropolis.

Details

International Journal of Housing Markets and Analysis, vol. 17 no. 6
Type: Research Article
ISSN: 1753-8270

Keywords

Access Restricted. View access options
Article
Publication date: 23 September 2024

Ying Geng, Huai-Ying Huang, Ching-Hui Chen and Pei-Hsuan Lin

This study is a pilot study exploring the usefulness and ease of use of a prototype VR PetCPR system and discusses the possibility of using it to facilitate pet healthcare skills…

74

Abstract

Purpose

This study is a pilot study exploring the usefulness and ease of use of a prototype VR PetCPR system and discusses the possibility of using it to facilitate pet healthcare skills acquisition. The designed VR PetCPR training system aims to provide pet healthcare professionals with an inexpensive, accessible and reliable CPR training tool and refine their skills in a controlled and simulated environment.

Design/methodology/approach

The study was conducted in a one-day workshop. The workshop consisted of the morning section (Section A) and the afternoon section (Section B). Section A was the knowledge acquisition stage. Section B is the VR PetCPR stage. Trainees were then given 30 min to experience the VR PetCPR set. When trainees were ready, they were required to complete two trials of dog CPR practice. After the practice, trainees completed the questionnaire and reported their attitudes toward VR PetCPR practice.

Findings

Overall, trainees held positive attitudes toward the effectiveness and usefulness of the VR PetCPR. After practicing skills via VR CPR, over half of the trainees responded that the system is effective in helping them understand the essential knowledge (e.g. operation status, operation positions, etc.) of performing CPR skills on a 30-pound dog. A significantly positive attitude was reported on trainees’ perceptions toward the ease of use of practicing their chest compression skills with the PetCPR. The positive attitudes significantly outnumbered the negative attitudes on explicit instruction and guidance, accessibility, convenience in practice and straightforward interface.

Originality/value

From data collected from 16 animal hospitals in the United States, Europe and Australia with 709 cases, 147 dogs (28%) and 58 cats (30%) temporarily attained ROSC during CPR, and 14 dogs (3%) and four cats (2%) survived to hospital discharge. Training veterinary CPR techniques and implementing RECOVER guidelines still have a long way to go. However, recent virtual reality simulations for CPR training were mainly designed for human patients CPR (Issleib et al., 2021; Liu et al., 2022; Almousa et al., 2019; Wong et al., 2018). The VR PetCPR remains a missing puzzle in the current VR training designs.

Details

Library Hi Tech, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0737-8831

Keywords

Access Restricted. View access options
Article
Publication date: 31 May 2024

Dorit Zimand Sheiner, Ofrit Kol and Shalom Levy

Studying the effect of social media advertising on consumer engagement, this study analyzes the impact of shared-experience versus personal message strategies, informational…

188

Abstract

Purpose

Studying the effect of social media advertising on consumer engagement, this study analyzes the impact of shared-experience versus personal message strategies, informational versus transformational creative appeals and low-involvement products versus high-involvement products. It aims to determine how best to combine ad elements to affect consumer engagement on different levels.

Design/methodology/approach

Using an online survey among 448 Facebook users, an experimental factorial design of 2 (message strategy conditions) X 2 (creative appeal conditions) X 2 (product types: TV vs. frozen pizza) was used. Each advertisement was evaluated on three facets of engagement: cognitive, psychological and behavioral.

Findings

Results indicate that informational appeal is preferable for all conditions. The effectiveness of message strategy differs by product type, and interactions between message and appeal are significant only for the high-involvement product. Additionally, it indicates that message strategy is most significant in affecting behavioral engagement and not necessarily cognitive or psychological engagement.

Practical implications

To develop effective Facebook ads, practitioners should use a personal/informational combination when working with high-involvement products and a shared-experience/informational combination when working with low-involvement products.

Originality/value

An original grid for integrating message strategy and creative appeal is constructed in this paper. Besides behavioral engagement, it also evaluates cognitive and psychological engagement. By comparing products with a high and low involvement level, it provides marketers with actionable recommendations to increase social media campaign effectiveness.

Access Restricted. View access options
Article
Publication date: 1 June 2005

A.V. Kuznetsov and P. Geng

To investigate numerically the settling of small solid particles in a suspension of motile gyrotactic micro‐organisms in order to evaluate the possibility of using bioconvection…

488

Abstract

Purpose

To investigate numerically the settling of small solid particles in a suspension of motile gyrotactic micro‐organisms in order to evaluate the possibility of using bioconvection to slow down settling and enhance mixing between particles.

Design/methodology/approach

Numerical computations are performed at the North Carolina Supercomputing Center utilizing an Origin 2400 workstation. A conservative finite‐difference scheme is used to discretize the governing equations. A staggered uniform grid with the stream function and vorticity stored in one set of nodes and the number densities of micro‐organisms and solid particles stored in another set of nodes is utilized. CPU time required to investigate plume development until it attains steady‐state for 36 × 36 uniform mesh is about 50 h.

Findings

It is established that small solid particles that are heavier than water slow down bioconvection. Extremely small particles (nanoparticles) that have negligible settling velocity do not have any noticeable impact on bioconvection, very large particles (that have negligible diffusivity), or very heavy particles (that have very large settling velocity) also do not have any impact on bioconvection because they simply settle at the bottom. However, if the particles are of the optimal size and density (gravitational settling must compete with Brownian diffusion to create an exponential number density distribution of solid particles with the maximum at the bottom of the chamber), these particles can effectively slow down bioconvection.

Research limitations/implications

The question how solid particles may affect the wavelengths of bioconvection patterns requires further investigation.

Practical implications

The finding that solid particles slow down bioconvection may be important in using bioconvection to enhance mixing in fluid microvolumes.

Originality/value

The paper provides a model and numerical data about the effect of bioconvection on mixing of small solid particles. These data are valuable for researches working in fundamental fluid mechanics, multiphase flow, and applications of bioconvection.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 15 no. 4
Type: Research Article
ISSN: 0961-5539

Keywords

Access Restricted. View access options
Book part
Publication date: 9 March 2021

Begum Sertyesilisik and Egemen Sertyesilisik

Sustainability performance of the global trade as well as of the traded products are affected by the trade policies and trade tariffs. Trade tariffs and policies can either…

Abstract

Sustainability performance of the global trade as well as of the traded products are affected by the trade policies and trade tariffs. Trade tariffs and policies can either encourage or discourage trade among the countries affecting feasibility of trade. In other words, the scope and amount of these trade tariffs have impact on the trade globally. Based on an in-depth literature review, this chapter aims to examine impacts of the trade policies and trade tariffs on the environmental footprint of the global trade. With this aim, recent trade policies and trade tariffs as well as roles of the trade policies, trade tariffs in reducing environmental footprint of the global trade are examined. It arrives at the conclusion that trade tariffs can affect environmental footprint of the global trade as well as of the traded products. They can have impact on the feasibility of the trading activities influencing their profit margins and costs. Based on these findings, recommendations for trade policies and trade tariffs are thereby provided to enhance sustainability performance of the global trade.

Details

Global Tariff War: Economic, Political and Social Implications
Type: Book
ISBN: 978-1-80071-314-7

Keywords

1 – 10 of over 3000
Per page
102050