bluuebunny/crossref_metadata_2025_split huggingface dataset:
Why do millennials use Facebook? Enduring insights
Authors: Ambrose Grace J. , Meng Juan (Gloria) , Ambrose Paul J. 
Published: February 2020

Purpose
This study aims to address the following questions: What is enduring about consumer behavior on social media given that digital and social media (DSM) technologies change rapidly? Why do millennials use social media to the extent they do? The authors’ review revealed that a prevailing theoretical approach that may help answer these questions is inadequate. The technology acceptance model (TAM) from information systems was grafted into marketing to explain consumer technology adoption. TAM predicts Facebook adoption effectively, as demonstrated in the authors’ first study, but does not go beyond that in explaining the why’s behind its use. In a second study, the authors used the means-end approach (MEC) complementarily to unearth the why’s of millennials’ use of Facebook.

Design/methodology/approach
The authors used a mixed-methods design combining the structural modeling of TAM with the probing one-on-one interviews and laddering of MEC.

Findings
The authors found that the laddering process both widened and deepened TAM’s scope. It not only confirmed the importance of the TAM attributes, perceived ease of use and perceived usefulness, but it also revealed others, in determining adoption. It was also able to dig deeper from these to uncover a mesh of fundamental values that millennials used Facebook to satisfy, such as belongingness, pleasure, social acceptance and inner harmony, in their quest for inner and relational contentment. The authors also found negative aspects that kept consumers away, such as its lack of privacy and the overwhelming nature of unwanted video in its feed, tying these back to important values.

Research limitations/implications
The authors build on prior exploratory work relating to DSM use and uncover psychological drivers of consumer behavior on social media, by blending TAM in a consumer context, and the MEC approach. The TAM-MEC framework used here offers a technology-independent template for other DSM research, by focusing on how and why consumers use media socially.

Practical implications
Managerially, the authors discuss the building of sustainable marketing strategy on enduring consumer values rather than on transient attributes or technologies. The authors also discuss potential areas of vulnerability for Facebook, such as its increasing use of video and live content, which creates negative consumer sentiment and which may drive consumers to competitors.

Originality/value
By blending the quantitative TAM and the qualitative MEC, something that has not been done before in marketing, this research provides trustworthy answers to the research questions. In so doing, this study also contributes some cohesion to the fragmented DSM research field, as called for recently in prominent journals, by anchoring DSM study in well-established theories in marketing.
Exploring emotional traces in families’ recollection of experiences
Authors: Clauzel Amélie , Guichard Nathalie , Damay Coralie 
Published: February 2020

PurposeFrom experiences recollections, this study aims to explore the place of emotions in the souvenir’s step of the family consumption process of luxury hotels stays.Design/methodology/approachTo explore the emotional dimension, this exploratory research is based on a triple qualitative approach (software, manual and a psychology-based approach). In total, 1,055 e-reviews, following a family stay in four- and five-star hotels, were collected.FindingsThe findings highlight an omnipresent emotional dimension in the recollections of experiences of consumers who have travelled with their families. These emotional traces differ according to the hotel’s positioning. Overall, positive emotions are much more prominent in the most luxurious hotels, while negative emotions are more related to the four-star hotels. Moreover, the four-star hotels reviews mainly associate emotions with the tangible aspects of the offer. Those in five-star hotels are more structured through intangible aspects.Research limitations/implicationsThe study of family decision-making dynamic, with a focus on the role of each family member, is a first perspective. That of experiences recollections apart from the digital approach is also to be considered.Practical implicationsOn the one hand, the objective is to extend the literature about the role of emotions in a service consumption process, and especially in a family context, trying to understand the post-purchase step of these customers. On the other hand, it is interesting for hotel managers to identify to which aspects of the offer (e.g. comfort, room, catering, decoration) the emotional traces that have remained in the customers’ memory are associated.Originality/valueThis study considers the family unit in a new way, that of its emotional memories’ traces of luxury hotels experiences. The post-consumer stage of the purchase process based on many spontaneous online reviews analysis is investigated.
Customer-to-customer value co-creation in different service settings
Authors: Pandey Sneha , Kumar Divesh 
Published: February 2020

Purpose
This study aims to identify and classify the types of value stemming from cooperative creation of experience among customers present in various social and interaction-rich service settings, thus leading to customer–customer value co-creation.

Design/methodology/approach
This exploratory qualitative study uses phenomenological approach and involves ten semi-structured in-depth interviews conducted in different interaction-rich service settings. The interviews were analysed using soft laddering interview technique to uncover various customer-to-customer (C2C) co-created values.

Findings
Based upon the literature available and the interviews conducted, the types of value classified in this study are hedonic value (further classified as relational/social/interactional value, emotional value, epistemic/novelty/learning/information-seeking, personal value and symbolic/expressive value), atmospheric value and economic/utilitarian value (efficiency and quality).

Research limitations/implications
One of the major limitations would be the small number of interviews conducted in a few service setups, which makes it difficult to generalise the results. Also, customer–customer interactions, leading to value co-creation online, were not considered.

Practical implications
By facilitating C2C value co-creation, service firms would be able to obtain increased contributory support among customers and also facilitate its customers in providing superior customer experience indirectly to others present, which is considered to be the ultimate goal of a firm.

Originality/value
This would be among the first studies to classify the types of value taking place when customers interact among themselves and to provide concrete suggestions for the managers fostering C2C value co-creation during a service.
Establishing psychological relationship between female customers and retailers
Authors: Edirisinghe Dilini , Nazarian Alireza , Foroudi Pantea , Lindridge Andrew 
Published: February 2020

PurposeThe purpose of this qualitative study is to investigate how young female customers establish psychological relationships with small- to medium-scale retail stores over time forming purchase intentions, actual purchase patterns and repurchase behaviour. Role of various customer typologies was also considered.Design/methodology/approachA case study approach was implemented to collect and analyse data, where data was collected from 20 young female customers and ten clothing retailers using purposive sampling via semi-structured interviews. Interviews with customers were conducted in a place of their choice such as in a coffee shop, whereas data from retailers were collected in the retail stores. Both online and offline retail patronage was considered to incorporate the growing tendency towards online shopping. Results were analysed using thematic analysis.FindingsThis study managed to reveal a number of interesting findings on how female customers form and develop psychological relationships with clothing retailers over time that ultimately builds customer loyalty. Customer behaviour in pre-purchase, purchase and re-purchase stages can significantly vary according to their individual perceptions, whereas they have a few favourite clothing brands that they frequently shop for. Preference for online shopping was found to be minimal, most of them enjoying in store experiences. Further, word of mouth and unique designs emerged as key contributors in establishing retail brand loyalty.Practical implicationsThis paper provides better insights for clothing retailers and industry practitioners in understanding how customer perceptions affect clothing purchase decisions.Originality/valueThis paper contributes to the retail literature by emphasizing on various elements that should be amalgamated through proper synthesis to serve customers. The research is unique as it analyses customer behaviour using a recreational activity model as opposed to marketing models to demonstrate how customers develop relationships with retail brands overtime.
Swarm-based chaotic gravitational search algorithm for solving mechanical engineering design problems
Authors: Rather Sajad Ahmad , Bala P. Shanthi 
Published: February 2020

PurposeThe purpose of this paper is to investigate the performance of chaotic gravitational search algorithm (CGSA) in solving mechanical engineering design frameworks including welded beam design (WBD), compression spring design (CSD) and pressure vessel design (PVD).Design/methodology/approachIn this study, ten chaotic maps were combined with gravitational constant to increase the exploitation power of gravitational search algorithm (GSA). Also, CGSA has been used for maintaining the adaptive capability of gravitational constant. Furthermore, chaotic maps were used for overcoming premature convergence and stagnation in local minima problems of standard GSA.FindingsThe chaotic maps have shown efficient performance for WBD and PVD problems. Further, they have depicted competitive results for CSD framework. Moreover, the experimental results indicate that CGSA shows efficient performance in terms of convergence speed, cost function minimization, design variable optimization and successful constraint handling as compared to other participating algorithms.Research limitations/implicationsThe use of chaotic maps in standard GSA is a new beginning for research in GSA particularly convergence and time complexity analysis. Moreover, CGSA can be used for solving the infinite impulsive response (IIR) parameter tuning and economic load dispatch problems in electrical sciences.Originality/valueThe hybridization of chaotic maps and evolutionary algorithms for solving practical engineering problems is an emerging topic in metaheuristics. In the literature, it can be seen that researchers have used some chaotic maps such as a logistic map, Gauss map and a sinusoidal map more rigorously than other maps. However, this work uses ten different chaotic maps for engineering design optimization. In addition, non-parametric statistical test, namely, Wilcoxon rank-sum test, was carried out at 5% significance level to statistically validate the simulation results. Besides, 11 state-of-the-art metaheuristic algorithms were used for comparative analysis of the experimental results to further raise the authenticity of the experimental setup.
Vibration and noise studies on wind turbine generator for reduction of vibrations and noise
Authors: Shinagam Ramakrishna , Ajay Guntaka , Patta Lokanadham , Gandam Anand Siva 
Published: February 2020

Purpose
Wind power is the one of best natural resources to meet the demands of electricity in India. In this regard, one of engineering college in Visakhapatnam has procured wind turbine generators of 200 kWp and got these installed on the rooftop of the college buildings for research and power generation. After starting the mills, huge vibrations were experienced by the staff and students in the laboratories and classrooms. So, the purpose of this paper is to carry out vibration and noise studies on wind turbine generator to identify the problem for high vibrations and suggest a novel method for vibration reduction.

Design/methodology/approach
Experimental vibration and natural frequency investigations are carried when wind velocity around 6.0 m/s using frequency analyzer, impact hammer, condenser microphone and accelerometer. An attempt is made to reduce the vibration and noise level of wind turbine generator by inserting a steel coil spring of 300 mm length having 20 turns in series with turnbuckle D shackle assembly, which is used to connect the wind turbine generator to the hook mounted on slab.

Findings
A high vibration velocity of 9.9 mm/s was observed on at base frame of wind turbine generator. The natural frequencies of hook and slab are observed in between 15 to 20 Hz from the natural frequency test. A high noise of 94.67 dBA is observed at a distance of 1 m from the base of wind turbine generator along the rotational axis of rotor. After modification to the baseline, WTG the vibration and noise levels are reduced to 4.8 mm/sec and 77.76 dBA, respectively.

Originality/value
This is the first time to study the huge vibrations generated in wind turbine generators installed on the rooftop of the college. Developed a novel methodology to reduce the vibrations by inserting a steel coil springs in turnbuckle D shackle assembly of wind turbine generators. After modification, wind turbine generator are running successfully without any high vibrations.
Palliative and end-of-life care’s barriers for older adults
Authors: Indarwati Retno , Fauziningtyas Rista , Kuncahyo Gilang Dwi , Tristiana Rr Dian , Chan Chong Mei , Smith Graeme D. 
Published: February 2020

Purpose
A nursing home is a place that is familiar with death, since many older adults will spend the latter part of their lives in such a setting. However, research on this topic is still limited, especially in Indonesia. The purpose of this paper is to explore the barriers to successful palliative and, more generally, end-of-life care (EOLC) for older adults in nursing homes and to explore nurses’ views on the subject.

Design/methodology/approach
The study is of a qualitative nature and it employs a phenomenological approach. In-depth interviews with 15 nurses who taken care of older adults in a nursing home were conducted. The data were analysed using thematic content analysis.

Findings
Barriers to effective EOLC include lack of knowledge, ineffectual communication and insufficient resources.

Research limitations/implications
Better policies are needed, especially in training related to palliative/EOLC subjects and equitable distribution of professional health workers to overcome the barriers. The government should also encourage collaboration involving hospitals, Puskesmas (Health Centre Services), community and resident care settings in sharing knowledge and skills, especially for nurses.

Originality/value
The barriers identified in palliative and EOLC have been found to be almost identical to those encountered in other health services.
What explains vast differences in jumping power within a clade? Diversity, ecology and evolution of anuran jumping power
Authors: Mendoza Elizabeth , Azizi Emanuel , Moen Daniel S. 
Published: February 2020

Abstract

Anuran (frog and toad) jumping power varies greatly across species, yet muscle power does not. Given that the jumping power of some species is up to five times higher than typical muscle power, power amplification by elastic elements is suggested to explain this discrepancy. However, the ecological reasons for this variation in jumping power remain unclear. One hypothesis is that small jumpers are limited by the time available to accelerate their body during take‐off, leading to small species needing greater power production than larger species to achieve similar jumping performance. Another (non‐mutually exclusive) hypothesis is that the microhabitat species inhabit may drive variation through trade‐offs with performance in microhabitat‐specific, non‐jumping behaviours.

We compared jumping power across 68 anuran species that were diverse in evolutionary relationships, microhabitat use and body mass. We used phylogenetic comparative methods to compare the role of microhabitat and body mass in explaining variation in jumping power across species.

We found the strongest support for a model that included two factors and their interaction. First, as body mass increased, jumping power decreased. Second, species that burrowed showed lower jumping power than species that did not burrow. Third, the interaction between body mass and burrowing behaviour showed that jumping power declines more rapidly with body mass in burrowing species than non‐burrowing species.

The effect of body mass suggests that interspecific variation in jumping power might be partly explained by scaling relationships. Anurans with small body mass may be able to achieve similar locomotor performance (e.g. takeoff velocity) as those with larger body mass, by more effectively amplifying muscle power. Additionally, the effect of burrowing behaviour suggests that species that use hindlimbs to burrow may experience a reduction in their ability to generate jumping power. This may indicate a functional trade‐off between jumping and burrowing performance.

A free Plain Language Summary can be found within the Supporting Information of this article.
Association between heart rate variability indices and features of spontaneous ventricular tachyarrhythmias in mice
Authors: He Mi , Zhao Wei‐Bo , Nguyen My‐Nhan , Kiriazis Helen , Li Yong‐Qin , Hu Houyuan , Du Xiao‐Jun 
Published: February 2020

AbstractDirect evidence is limited for the association between heart rate variability (HRV) indices and ventricular tachyarrhythmias (VTAs). While galectin‐3 (Gal‐3) is regarded as a causal factor for cardiac remodelling and a biomarker for arrhythmias, its regulation on VTAs and HVR is unknown. Using aged transgenic (TG) mice with cardiac overexpression of β2‐adrenoceptors and spontaneous VTAs, we studied whether changes in HRV indices correlated with the severity of VTAs, and whether Gal‐3 gene knockout (KO) in TG mice might limit VTA. Body‐surface ECG was recorded (10‐minute period) in 9‐ to 10‐month‐old mice of non‐transgenic (nTG), TG and TG × Gal‐3 knockout (TG/KO). Time‐domain, frequency‐domain and nonlinear‐domain HRV indices were calculated using the R‐R intervals extracted from ECG signals and compared with frequency of VTAs. TG and TG/KO mice developed frequent VTAs and showed significant changes in certain time‐domain and nonlinear‐domain HRV indices relative to nTG mice. The severity of VTAs in TG and TG/KO mice in combination, estimated by VTA counts and arrhythmia score, was significantly correlated with certain time‐domain and nonlinear‐domain HRV indices. In conclusion, significant changes in HRV indices were evident and correlated with the severity of spontaneous VTAs in TG mice. The frequency of VTA and HRV indices were largely comparable between TG and TG/KO mice. Deletion of Gal‐3 in TG mice altered certain HRV indices implying influence by neuronally localized Gal‐3 on autonomic nervous activity.
Polygenic liability for schizophrenia and childhood adversity influences daily‐life emotion dysregulation and psychosis proneness
Authors: Pries L.‐K. , Klingenberg B. , Menne‐Lothmann C. , Decoster J. , van Winkel R. , Collip D. , Delespaul P. , De Hert M. , Derom C. , Thiery E. , Jacobs N. , Wichers M. , Cinar O. , Lin B. D. , Luykx J. J. , Rutten B. P. F. , van Os J. , Guloksuz S. 
Published: February 2020

ObjectiveTo test whether polygenic risk score for schizophrenia (PRS‐S) interacts with childhood adversity and daily‐life stressors to influence momentary mental state domains (negative affect, positive affect, and subtle psychosis expression) and stress‐sensitivity measures.MethodsThe data were retrieved from a general population twin cohort including 593 adolescents and young adults. Childhood adversity was assessed using the Childhood Trauma Questionnaire. Daily‐life stressors and momentary mental state domains were measured using ecological momentary assessment. PRS‐S was trained on the latest Psychiatric Genetics Consortium schizophrenia meta‐analysis. The analyses were conducted using multilevel mixed‐effects tobit regression models.ResultsBoth childhood adversity and daily‐life stressors were associated with increased negative affect, decreased positive affect, and increased subtle psychosis expression, while PRS‐S was only associated with increased positive affect. No gene–environment correlation was detected. There is novel evidence for interaction effects between PRS‐S and childhood adversity to influence momentary mental states [negative affect (b = 0.07, P = 0.013), positive affect (b = −0.05, P = 0.043), and subtle psychosis expression (b = 0.11, P = 0.007)] and stress‐sensitivity measures.ConclusionExposure to childhood adversities, particularly in individuals with high PRS‐S, is pleiotropically associated with emotion dysregulation and psychosis proneness.
Relationships between US state alcohol policies and alcohol outcomes: differences by gender and race/ethnicity
Authors: Subbaraman Meenakshi S. , Mulia Nina , Kerr William C. , Patterson Deidre , Karriker‐Jaffe Katherine J. , Greenfield Thomas K. 
Published: February 2020

AbstractBackground and AimsAlcohol taxation and availability restrictions are among the most effective methods for reducing alcohol use and problems, yet may affect demographic subgroups differently. Understanding who responds to specific policies can inform approaches for reducing disparities. We examined how state‐level beverage‐specific taxes and availability restrictions in the United States are associated with consumption and alcohol‐related problems across subgroups defined by gender and race/ethnicity.Design, Setting and ParticipantsData came from the 2000–15 National Alcohol Surveys (n = 28 251), computer‐assisted telephone cross‐sectional surveys of United States residents aged 18+. African Americans and Hispanics were oversampled.MeasurementsPrimary outcomes were beverage‐specific (beer, wine, spirits and total) volume, DSM‐IV alcohol dependence and alcohol‐related consequences. Analyses entailed survey‐weighted log–log and logistic regressions adjusting for state‐level beer tax, spirits tax, government‐controlled spirits sales and sales tax; respondent ZIP‐code‐level density of off‐premise beer outlets, off‐premise spirits outlets and on‐premise bars; respondent individual‐level age, marital status, education, employment and income; and fixed effects for wet/moderate/dry US region and year.FindingsHigher beer tax was significantly (P < 0.05) associated with lower odds of any drinking among white women [odds ratio (OR) = 0.98] and lower beer volume (price‐elasticity = −0.40), total volume (price‐elasticity = −0.50) and odds of alcohol‐related consequences (OR = 0.84) among African American women. Higher spirits tax was significantly (P < 0.05) associated with both lower beer and total volume among Hispanic women (price‐elasticities = −0.73 and − 1.04, respectively) and men (price‐elasticities = −1.19 and − 0.92, respectively) and decreased wine volume among Hispanic women (price‐elasticity = −0.62). Apparent protective effects of living in a state with government‐controlled spirits sales or a neighborhood with lower bar density was greater among white men than other groups.ConclusionsThe effects of beverage‐specific taxes and alcohol availability policies may vary across subgroups, highlighting the importance of considering differential policy impacts in future research and intervention.