Grey Wolf Optimizer (GWO) is a new swarm intelligence algorithm mimicking the behaviours of grey wolves. Its abilities include fast convergence, simplicity and easy realization. It has been proved ...its superior performance and widely used to optimize the continuous applications, such as, cluster analysis, engineering problem, training neural network and etc. However, there are still some binary problems to optimize in the real world. Since binary can only be taken from values of 0 or 1, the standard GWO is not suitable for the problems of discretization. Binary Grey Wolf Optimizer (BGWO) extends the application of the GWO algorithm and is applied to binary optimization issues. In the position updating equations of BGWO, the a parameter controls the values of A and D, and influences algorithmic exploration and exploitation. This paper analyses the range of values of AD under binary condition and proposes a new updating equation for the a parameter to balance the abilities of global search and local search. Transfer function is an important part of BGWO, which is essential for mapping the continuous value to binary one. This paper includes five transfer functions and focuses on improving their solution quality. Through verifying the benchmark functions, the advanced binary GWO is superior to the original BGWO in the optimality, time consumption and convergence speed. It successfully implements feature selection in the UCI datasets and acquires low classification errors with few features.
•In the binary Grey Wolf Optimizer, the value of AD belongs to -4, 4.•Transfer function plays an important role in the binary Grey Wolf Optimizer.•Original updating equation for a cannot balance exploration and exploitation.•New updating equation for a is proposed to improve the solution quality.
Purpose
In recent years, there has been an increase in the number of studies using social robots to improve psychological well‐being. This systematic review investigates the effect of social robot ...interventions for depression in older adults.
Methods
The Preferred Reporting Items for Systematic Reviews and Meta‐Analysis (PRISMA) method was used to identify and select existing studies. Nine electronic databases were searched for relevant studies. Methodological quality was assessed using the Joanna Briggs Institute Meta‐Analysis of Statistics Assessment and Review Instrument. Screening, data extraction, and synthesis were performed by three reviewers. Inclusion criteria covered original quantitative studies investigating social robots for depression in older adults.
Findings
Seven studies were identified—six randomized controlled trials and one comparison study—with all classified as good quality. Social robot interventions consisted of companion, communication, and health‐monitoring robots. Three studies presented promising outcomes for reducing depressive symptoms in older adults following social robot interventions, and three studies showed decreased, but nonsignificant, trends in depression scores.
Conclusions
The results highlight the potential of social robot interventions for reducing depression in older adults. However, the evidence is not strong enough to formulate recommendations on clinical effectiveness.
Clinical Relevance
Social robots are being used with increasing frequency to potentially provide personal support to older adults living in long‐term care facilities. Social robots can be used to help alleviate depressive symptoms when used in group activities.
As more and more marketers incorporate social media as an integral part of the promotional mix, rigorous investigation of the determinants that impact consumers' engagement in eWOM via social ...networks is becoming critical. Given the social and communal characteristics of social networking sites (SNSs) such as Facebook, MySpace and Friendster, this study examines how social relationship factors relate to eWOM transmitted via online social websites. Specifically, a conceptual model that identifies tie strength, homophily, trust, normative and informational interpersonal influence as an important antecedent to eWOM behaviour in SNSs was developed and tested. The results confirm that tie strength, trust, normative and informational influence are positively associated with users' overall eWOM behaviour, whereas a negative relationship was found with regard to homophily. This study suggests that product-focused eWOM in SNSs is a unique phenomenon with important social implications. The implications for researchers, practitioners and policy makers of social media regulation are discussed.
Purpose
This study aims to provide an assessment of the existing literature on the role of social media advertising in hospitality, tourism and travel (HTT) as well as an agenda for future research.
...Design/methodology/approach
Covering a 15-year time span (2004–2019), this study is focused on journal papers archived in two academic databases in social sciences: Business Source Complete and Communication and Mass Media Complete. Each of the 192 papers collected was coded for 8 major variables: journal, year of publication, research topic, country studied, type of social media investigated, method, theoretical underpinning and key findings.
Findings
Three major topic areas are identified in this study: use of social media from consumer’s perspective, use of social media from organization’s perspective and effects of social media.
Research limitations/implications
Although a few prior papers have provided a literature review of social media in tourism and hospitality, no review-based papers have ever examined social media as an advertising vehicle in the context of HTT. Most reviews to date have been limited to general social media studies, without much advancement of theory building in advertising research.
Originality/value
To the best of the authors’ knowledge, this paper represents the first theoretical review of academic research on social media advertising in HTT. The review concludes by suggesting a theoretical framework for studying social media advertising in HTT and offering an agenda for future research.
This study examines how consumers' corporate social responsibility (CSR)‐related activities in social media affect their responses to brands. We defined consumers' CSR‐related activities in social ...media as the extent to which consumers use social media to engage in CSR communication by companies. An online survey was conducted to examine social media users in China, the largest consumer market in today's global economies. This study developed a theoretical model and empirically tested the relationships between consumers' CSR‐related activities in social media, identification with the brand, and three consumer behavior outcomes: electronic word‐of‐mouth (eWOM) intention, brand attitude, and purchase intention. The results suggested that consumers' CSR‐related activities in social media significantly impacted eWOM intention and purchase intention through enhancing identification with the brand and positive brand attitude. This study provides important insights on consumer behavior and CSR by investigating social media, an important and emerging marketing platform. Moreover, this study fills in the research gap about the association between consumers' CSR‐related activities in social media and their responses to brands. Theoretical and managerial implications for CSR strategies in social media are discussed.
This study investigates cross-cultural differences between Chinese and American consumers in the relationships of electronic word-of-mouth (eWOM) intentions and consumers’ engagement with CSR ...communication through social media with three antecedents: (1) attitude toward CSR in social media, (2) peer communication about CSR activities, and (3) opinion leadership characteristics. An online survey was conducted with samples of social media users in China and the U.S. Results from the multiple-group analysis show that the degree of impact of the three antecedents varies significantly between consumers in China and the U.S. Specifically, the influence of attitudes toward CSR in social media on consumers’ engagement with CSR communication in social media is stronger for the Chinese participants than for the U.S. participants. In addition, peer communication and opinion leadership characteristics have significantly stronger effects on consumers’ engagement with CSR communication via social media for the Chinese participants than for the U.S. participants.
Surrogate-assisted evolutionary algorithms (SAEAs) are potential approaches to solve computationally expensive optimization problems. The critical idea of SAEAs is to combine the powerful searching ...capabilities of evolutionary algorithms with the predictive capabilities of surrogate models. In this study, an efficient surrogate-assisted hybrid optimization (SAHO) algorithm is proposed via combining two famous algorithms, namely, teaching–learning-based optimization (TLBO) and differential evolution (DE). The TLBO is focused on global exploration and the DE is concentrated on local exploitation. These two algorithms are carried out alternately when no better candidate solution can be found. Meanwhile, a new prescreening criterion based on the best and top collection information is introduced to choose promising candidates for real function evaluations. Besides, two evolution control (i.e., the generation-based and individual-based) strategies and a top-ranked restart strategy are integrated in the SAHO. Moreover, a local RBF surrogate which does not need too many training samples is employed to model the landscapes of the target function. Sixteen benchmark functions and the tension/compression spring design problem are adopted to compare the proposed SAHO with other state-of-the-art approaches. Extensive comparison results demonstrate that the proposed SAHO has superior performance for solving expensive optimization problems.
This study evaluates the effectiveness of augmented reality (AR) as an e-commerce tool using two products — sunglasses and watches. Study 1 explores the effectiveness of AR by comparing it to a ...conventional website. The results show that AR provides effective communication benefits by generating greater novelty, immersion, enjoyment, and usefulness, resulting in positive attitudes toward medium and purchase intention, compared to the web-based product presentations. Study 2 compares the paths by which consumers evaluate products through AR versus web with a focus on interactivity and vividness. It is revealed that immersion mediates the relationship between interactivity/vividness and two outcome variables — usefulness and enjoyment in the AR condition compared to the web condition where no significant paths between interactivity and immersion and between previous media experience and media novelty are found. Participants' subjective opinions about AR are examined through opinion mining to better understand consumer responses to AR.
•AR-based product presentations generally provide effective communication benefits compared to web-based product presentations.•The positive relationship between interactivity/vividness and usefulness/enjoyment is mediated by a sense of immersion.•The greater consumers' perceived media usefulness/enjoyment in using AR, the more positive the attitude toward AR.•The greater consumers' perceived AR media novelty, the greater is consumers' immersive AR experience.•The greater previous media experience with AR, the lower is consumers' perceived AR media novelty.
Inspired by migratory graying, Pan et al. proposed the fish migration optimization (FMO) algorithm. It integrates the models of migration and swim into the optimization process. This paper firstly ...proposes a binary version of FMO, called BFMO. In order to improve the search ability of BFMO, ABFMO is introduced to solve the problems of stagnation and falling into local traps. The transfer function is responsible for mapping the continuous search space to the binary space. It plays a critical factor in the binary meta-heuristics. This paper brings a new transfer function and compares it with the transfer functions used by BPSO, BGSA and BGWO. Experiments prove that the new transfer function has realized good results in the solving quality. Unit commitment (UC) is a NP-hard binary optimization problem. BFMO and ABFMO are tested with the IEEE benchmark systems consisting of various generating units with 24-h demand horizon. The effectivenesses of BFMO and ABFMO are compared with seven binary evolutionary algorithms. The simulation results and non-parametric tests verify that they achieve great performance.
•Binary Fish Migration Optimization (BFMO) is first proposed.•Transfer function plays an important role in the binary fish migration optimization.•The advanced version of BFMO avoids local traps.•The two binary versions implement unit commitment in the 10-100 generating units with 24-h demand horizon.
This article uses nineteenth-century migration-themed texts and images as a starting point for investigating the production of various patterns of seaborne mobilities en route to colonial Australia ...from the 1830s to the 1880s. Within the mobility framework, the floating world of emigrant ships provides a major venue for truthful representations of passengers' daily practices on board ship in general and maritime historiography in particular. It is argued that the interplay between body and space at different scales enables us to foreground the mobile, therapeutic, and affective dimensions of migration along the lines of class and gender. To this end, the article considers the production of seaborne mobilities within a larger context of maritime culture by engaging with four central thoughts: ship-based mobilities and mobile bodies, bodily motion and spatial mobilities, bodily health and therapeutic mobilities, as well as bodily senses and affective mobilities. These central thoughts, the article further asserts, direct us towards considering how the ship comes to be the prime site for evoking the imagery of mobile Britons, especially with regard to the various ways in which every-day mobilities are intrinsically embodied, practiced and performed through a body in transit.
PDF
