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Article
Publication date: 24 June 2024

Qingting Wei, Xing Liu, Daming Xian, Jianfeng Xu, Lan Liu and Shiyang Long

The collaborative filtering algorithm is a classical and widely used approach in product recommendation systems. However, the existing algorithms rely mostly on common ratings of…

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Abstract

Purpose

The collaborative filtering algorithm is a classical and widely used approach in product recommendation systems. However, the existing algorithms rely mostly on common ratings of items and do not consider temporal information about items or user interests. To solve this problem, this study proposes a new user-item composite filtering (UICF) recommendation framework by leveraging temporal semantics.

Design/methodology/approach

The UICF framework fully utilizes the time information of item ratings for measuring the similarity of items and takes into account the short-term and long-term interest decay for computing users’ latest interest degrees. For an item to be probably recommended to a user, the interest degrees of the user on all the historically rated items are weighted by their similarities with the item to be recommended and then added up to predict the recommendation degree.

Findings

Comprehensive experiments on the MovieLens and KuaiRec datasets for user movie recommendation were conducted to evaluate the performance of the proposed UICF framework. Experimental results show that the UICF outperformed three well-known recommendation algorithms Item-Based Collaborative Filtering (IBCF), User-Based Collaborative Filtering (UBCF) and User-Popularity Composite Filtering (UPCF) in the root mean square error (RMSE), mean absolute error (MAE) and F1 metrics, especially yielding an average decrease of 11.9% in MAE.

Originality/value

A UICF recommendation framework is proposed that combines a time-aware item similarity model and a time-wise user interest degree model. It overcomes the limitations of common rating items and utilizes temporal information in item ratings and user interests effectively, resulting in more accurate and personalized recommendations.

Details

International Journal of Intelligent Computing and Cybernetics, vol. 17 no. 3
Type: Research Article
ISSN: 1756-378X

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Book part
Publication date: 3 August 2017

Matt Bower

This chapter provides a comprehensive review of research and developments relating to the use of Web 2.0 technologies in education. As opposed to early educational uses of the…

Abstract

This chapter provides a comprehensive review of research and developments relating to the use of Web 2.0 technologies in education. As opposed to early educational uses of the Internet involving publication of static information on web pages, Web 2.0 tools offer a host of opportunities for educators to provide more interactive, collaborative, and creative online learning experiences for students. The chapter starts by defining Web 2.0 tools in terms of their ability to facilitate online creation, editing, and sharing of web content. A typology of Web 2.0 technologies is presented to illustrate the wide variety of tools at teachers’ disposal. Educational uses of Web 2.0 technologies such as wikis, blogs, and microblogging are explored, in order to showcase the variety of designs that can be utilized. Based on a review of the research literature the educational benefits of using Web 2.0 technologies are outlined, including their ability to facilitate communication, collaborative knowledge building, student-centered activity, and vicarious learning. Similarly, issues surrounding the use of Web 2.0 tools are distilled from the literature and discussed, such as the possibility of technical problems, collaboration difficulties, and plagiarism. Two case studies involving the use Web 2.0 tools to support personalized learning and small group collaboration are detailed to exemplify design possibilities in greater detail. Finally, design recommendations for learning and teaching using Web 2.0 are presented, again based on findings from the research literature.

Details

Design of Technology-Enhanced Learning
Type: Book
ISBN: 978-1-78714-183-4

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Article
Publication date: 27 January 2021

Irina Tatiana Garces and Cagri Ayranci

A review on additive manufacturing (AM) of shape memory polymer composites (SMPCs) is put forward to highlight the progress made up to date, conduct a critical review and show the…

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Abstract

Purpose

A review on additive manufacturing (AM) of shape memory polymer composites (SMPCs) is put forward to highlight the progress made up to date, conduct a critical review and show the limitations and possible improvements in the different research areas within the different AM techniques. The purpose of this study is to identify academic and industrial opportunities.

Design/methodology/approach

This paper introduces the reader to three-dimensional (3 D) and four-dimensional printing of shape memory polymers (SMPs). Specifically, this review centres on manufacturing technologies based on material extrusion, photopolymerization, powder-based and lamination manufacturing processes. AM of SMPC was classified according to the nature of the filler material: particle dispersed, i.e. carbon, metallic and ceramic and long fibre reinforced materials, i.e. carbon fibres. This paper makes a distinction for multi-material printing with SMPs, as multi-functionality and exciting applications can be proposed through this method. Manufacturing strategies and technologies for SMPC are addressed in this review and opportunities in the research are highlighted.

Findings

This paper denotes the existing limitations in the current AM technologies and proposes several directions that will contribute to better use and improvements in the production of additive manufactured SMPC. With advances in AM technologies, gradient changes in material properties can open diverse applications of SMPC. Because of multi-material printing, co-manufacturing sensors to 3D printed smart structures can bring this technology a step closer to obtain full control of the shape memory effect and its characteristics. This paper discusses the novel developments in device and functional part design using SMPC, which should be aided with simple first stage design models followed by complex simulations for iterative and optimized design. A change in paradigm for designing complex structures is still to be made from engineers to exploit the full potential of additive manufactured SMPC structures.

Originality/value

Advances in AM have opened the gateway to the potential design and fabrication of functional parts with SMPs and their composites. There have been many publications and reviews conducted in this area; yet, many mainly focus on SMPs and reserve a small section to SMPC. This paper presents a comprehensive review directed solely on the AM of SMPC while highlighting the research opportunities.

Details

Rapid Prototyping Journal, vol. 27 no. 2
Type: Research Article
ISSN: 1355-2546

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Article
Publication date: 14 October 2021

Craig McLaughlin, Stephen Armstrong, Maha W. Moustafa and Ahmed A. Elamer

This paper aims to empirically analyse specific characteristics of an audit committee that could be associated with the likelihood of corporate fraud/scandal/sanctions.

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Abstract

Purpose

This paper aims to empirically analyse specific characteristics of an audit committee that could be associated with the likelihood of corporate fraud/scandal/sanctions.

Design/methodology/approach

The sample includes all firms that were investigated by the Financial Reporting Council through the audit enforcement procedure from 2014 to 2019, and two matched no-scandal firms. It uses logistic binary regression analysis to examine the hypotheses.

Findings

Results based on the logit regression suggest that audit member tenure and audit committee meeting frequency both have positive associations to the likelihood of corporate scandal. Complementing this result, the authors find negative but insignificant relationships amongst audit committee female chair, audit committee female members percentage, audit committee qualified accountants members, audit committee attendance, number of shares held by audit committee members, audit committee remuneration, board tenure and the likelihood of corporate scandal across the sample.

Research limitations/implications

The results should help regulatory policymakers make decisions, which could be crucial to future corporate governance. Additionally, these results should be useful to investors who use corporate governance as criteria for investment decisions.

Originality/value

The authors extend, as well as contribute to the growing literature on the audit committee, and therefore, wider corporate governance literature and provide originality in that it is the first, to the knowledge, to consider two characteristics (i.e. remuneration and gender) in a UK context of corporate scandal. Also, the results imply that the structure and diversity of the audit committee affect corporate fraud/scandal/sanctions.

Details

International Journal of Accounting & Information Management, vol. 29 no. 5
Type: Research Article
ISSN: 1834-7649

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Article
Publication date: 14 March 2016

Zgarni Inaam and Halioui Khamoussi

Many researchers, in several contexts, have investigated the influence of audit committee effectiveness and audit quality variables on reducing the extent of earnings management…

6433

Abstract

Purpose

Many researchers, in several contexts, have investigated the influence of audit committee effectiveness and audit quality variables on reducing the extent of earnings management, and empirical evidence is rather inconsistent.

Design/methodology/approach

The aim of this paper is to meta-analyze the results of 58 prior studies that examined whether differences in results are related to moderating effects associated with corporate governance mechanisms or measures of earnings management.

Findings

The findings show that the meta-analysis identifies many significant relationships. The independence of the audit committee, its size, expertise and the number of meetings have a negative relationship with earnings management. Similar negative relationships exist between auditor size, specialization and earnings management.

Research limitations/implications

This study contributes to the corporate governance literature. Further, recognizing the function of an audit committee and audit quality shows the value of considering an institutional setting in governance research. This study is significant to academic and practitioner literatures, policy makers and professional accounting bodies as it shows that governance reforms promote companies to adopt good governance practices. The results also give useful information to investors in examining the effect of audit committee characteristics and audit quality on earnings quality.

Originality/value

This study extends existing research on audit committee and audit quality to oversee both accrual and real earnings management using meta-analysis. Thus, this study has the potential to help stakeholders, board of directors, regulators and auditors, who are related with enhancing the supervision of firms and reducing the opportunities given to managers, to engage in earnings management.

Details

International Journal of Law and Management, vol. 58 no. 2
Type: Research Article
ISSN: 1754-243X

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Article
Publication date: 1 August 2016

Wei Guo, Honglin Liu and Chaoli Lan

Based on core description, gas logging and laboratory analysis, this paper aims to study the controlling effect of the types of shale sedimentary microfacies in coal formations…

87

Abstract

Purpose

Based on core description, gas logging and laboratory analysis, this paper aims to study the controlling effect of the types of shale sedimentary microfacies in coal formations over shale reservoirs using the example of Shanxi formation in Northern Ordos Basin.

Design/methodology/approach

According to core observation, the authors selected typical samples of rock types for thin section analysis to determine the micro features and compositions of rocks.

Findings

By using core observation, we found that fine lithology in Shanxi formation included major shale, carbonaceous shale, partially carbonaceous shale, partially silty shale and silty shale with colors of gray, dark gray, black and/or gray. Shanxi Formation shale are deposited in plant-rich and plant-poor swamps, interdistributary depressions of delta plains, interfluvial depressions of meandering rivers as well as microfacies environment of natural levees and the distal crevasse splay.

Originality/value

Currently, the research on the shale gas in Shanxi Formation in the Ordos Basin is still in its infancy. There is yet no research on the fine-grained partition of the sedimentary facies in coal accumulation environment of Shanxi formation and the controlling effect of sedimentary microfacies over shale reservoirs.

Details

World Journal of Engineering, vol. 13 no. 4
Type: Research Article
ISSN: 1708-5284

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Article
Publication date: 4 March 2025

Xiaojian Jiang, Zhonggui Zhang, Jiafei Cheng, Yongjie Ai, Ziyue Zhang, Shuolei Wang, Shi Xu, Hongyu Gao and Yubing Dong

This study aims to fabricate the reduced graphene oxide (rGO)/ethylene vinyl acetate copolymer (EVA) composite films with electric-driven two-way shape memory properties for…

0

Abstract

Purpose

This study aims to fabricate the reduced graphene oxide (rGO)/ethylene vinyl acetate copolymer (EVA) composite films with electric-driven two-way shape memory properties for deployable structures application. The effect of dicumyl peroxide (DCP) and rGO on the structure and properties of the rGO/EVA composite films were systematically investigated.

Design/methodology/approach

The rGO/EVA composite films were fabricated by melting blend and swelling-ultrasonication method, DCP and rGO were used the crosslinking agent and conductive filler, respectively.

Findings

The research results indicate that the two-way shape memory properties of rGO/EVA composite films were significantly improved with the increase of DCP content. The rGO endowed rGO/EVA composite films with excellent electric-driven reversible two-way shape memory and anti-ultraviolet aging properties. The sample rGO/EVA-9 can be heated above Tm within 8 s at a voltage of 35 V and can be heated above the Tm temperature within 12 s under near-infrared light (NIR). Under a constant stress of 0.07 MPa, the reversible strain of the sample rGO/EVA-9 was 8.96% and its electric-driven shape memory behavior maintained great regularity and stability.

Research limitations/implications

The rGO/EVA composite films have potential application value in the field of deployable structures.

Originality/value

With the increase of DCP content, the two-way shape memory properties of rGO/EVA composite films were significantly improved, which effectively solved the problem that the shape memory properties of EVA matrix decreased caused by swelling. The rGO endowed rGO/EVA composite films with excellent electric/NIR driven reversible two-way shape memory properties.

Details

Pigment & Resin Technology, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 26 November 2019

Kanying Liu, Yong Lan and Wei Li

The pursuit of healthy and high-quality organic food has gradually become a trend. However, some researchers do not believe that the quality of organic food is higher than general…

658

Abstract

Purpose

The pursuit of healthy and high-quality organic food has gradually become a trend. However, some researchers do not believe that the quality of organic food is higher than general food. Consumers’ changed preference for different quality food will also affect the sales strategy of food producer. The purpose of this paper is to consider behavior-based pricing (BBP) and decision-making problems between organic and general food enterprises, based on consumers’ heterogeneity.

Design/methodology/approach

In this study, two different types of consumers are considered: consumers without preference difference and consumers with an organic food preference. This paper sets up two two-stage hoteling differential pricing models in the duopoly market, including organic and general food enterprises. Then, the optimal loyal price and poaching price of the two types of enterprises are solved, and the influence of each parameter on the pricing, market and profit of the two enterprises is analyzed.

Findings

This paper finds that, with the increase of the initial market share, the pricing strategies of organic food enterprises change from a loyal price lower than the poaching price to a loyal price higher than the poaching price, whereas the general food producer has the opposite pricing strategy. Furthermore, the difference in consumption utility between the two food types has a positive influence on the price of organic food, and a negative influence on the price of general food. In contrast, the consumer share without preference difference has a negative effect on organic food prices and a positive impact on the price of general food.

Originality/value

The contribution is constructive as no prior research has focused on the BBP and decision-making problems between organic and general food, and it considers the two types of consumers. Besides, the results also provide guidelines for choosing marketing strategies for organic and general food enterprises.

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Book part
Publication date: 28 November 2024

Serkan Eti, İrfan Ersin, Yaşar Gökalp, Çağatay Çağlayan and Duygu Yavuz

Agriculture is an activity that plays an important role in human life. Similarly, the agricultural sector plays an important role in the national economy. One of the biggest…

Abstract

Agriculture is an activity that plays an important role in human life. Similarly, the agricultural sector plays an important role in the national economy. One of the biggest problems of the agricultural sector is the carbon gas it produces during production. Fertilizing activities and tools used in plowing the fields cause this gas to be produced. The release of the said gas into nature causes serious damage to the environment. Therefore, carbon emissions in the agricultural sector are of vital importance. In line with this purpose, it is aimed to determine the most appropriate strategy for carbon emission in this study. As a result of the DEMATEL analysis, it was seen that the most appropriate strategy was effective regulations and auditing.

Details

Sustainable Agricultural Practices: Economic and Environmental Implications
Type: Book
ISBN: 978-1-83608-337-5

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Article
Publication date: 12 October 2012

Chaoqun Ma, Lan Liu, Junbo Wang and Jing Chen

The purpose of this paper is to examine the risk of inefficiency of China's stock index futures market by investigating the opportunity and profitability of exchange‐traded fund…

850

Abstract

Purpose

The purpose of this paper is to examine the risk of inefficiency of China's stock index futures market by investigating the opportunity and profitability of exchange‐traded fund (ETF) arbitrage. The explanation of behavioral risk to market efficiency is examined.

Design/methodology/approach

Based on cost‐of‐carry model, some assumptions about market efficiency were examined, and statistical tests were implemented to support the findings.

Findings

In China, borrowing and lending interest rates are quite different; dividends are small and paid in an irregular manner; and short sale cannot be used in arbitrage by all investors. It is found that the Chinese index futures market is far from efficient.

Originality/value

With reference to the empirical study, this is believed to be the first application of behavioral study to the study of market efficiency. The analysis of the statistics about Chinese index futures market and the algorithm parameters are very valuable for in‐depth understanding of the emerging markets.

Details

Kybernetes, vol. 41 no. 10
Type: Research Article
ISSN: 0368-492X

Keywords

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