bluuebunny/crossref_metadata_2025_split huggingface dataset:
Depression and social anxiety in relation to problematic smartphone use
Authors: Elhai Jon D. , Tiamiyu Mojisola , Weeks Justin 
Published: February 2018

Purpose
Previous research has found support for depression and anxiety severity in association with both increased and problematic smartphone use. However, little research has explored transdiagnostic psychopathology constructs as mediators that may account for these relationships. The purpose of this paper is to test rumination as a possible transdiagnostic (cross-sectional) mediator in these relationships.

Design/methodology/approach
The authors recruited 296 college students to complete relevant web survey measures, including the patient health questionnaire-9 (for depression severity), social interaction anxiety scale (for social anxiety severity), ruminative thought styles questionnaire, smartphone addiction scale-short version (to measure levels of problematic smartphone use), and a measure of smartphone use frequency.

Findings
The authors found support for a structural model whereby the severity of depression and social anxiety accounted for variance in rumination, which, in turn, correlated with problematic smartphone use levels. Rumination accounted for relations between both depression and social anxiety severity with levels of problematic use.

Originality/value
The authors discuss the role of rumination as a possible mechanism between anxiety- and depression-related psychopathology levels with problematic smartphone use severity. This study is unique in exploring rumination in the context of problematic smartphone use.
Incorporation of health consciousness into the technology readiness and acceptance model to predict app download and usage intentions
Authors: Chen Mei-Fang , Lin Neng-Pai 
Published: February 2018

Purpose
The purpose of this paper is to extend the technology readiness and acceptance model (TRAM) to consider an individual’s health consciousness (HC), thereby improving the capability of the model to predict an individual’s attitude toward and intention to download and use dietary and fitness apps.

Design/methodology/approach
A total of 994 participants completed a self-reported online questionnaire. Structural equation modeling and χ2 difference testing were conducted to compare the predictive capability of the proposed health consciousness TRAM (HC-TRAM) and the TRAM. The comparison of the proposed HC-TRAM in terms of potential and actual users of dietary and fitness apps was also discussed.

Findings
The results obtained from the HC-TRAM and the TRAM indicate that in addition to technology readiness, HC exerts a positive effect on the perceived ease of use and usefulness of dietary and fitness apps. χ2 difference test results indicated that the predictive capability of the proposed HC-TRAM is higher than that of the TRAM.

Practical implications
The drivers and inhibitors of a person’s readiness to embrace modern information technology play roles when predicting his or her intention to download and use dietary and fitness apps. HC should be promoted by encouraging people to eat right and regularly perform appropriate exercise to prevent obesity and overweight, thereby maintaining a healthy lifestyle.

Originality/value
This study incorporated individual cognitive factors and HC into the TRAM to fill the literature gap and deepen and broaden existing theoretical frameworks of the TRAM in the public health sector.
Investigating the impact of mobile SNS addiction on individual’s self-rated health
Authors: Xue Yajiong , Dong Yuanyuan , Luo Mengyun , Mo Dandan , Dong Wei , Zhang Zhiruo , Liang Huigang 
Published: February 2018

Purpose
The purpose of this paper is to investigate how WeChat addiction influences users’ physical, mental, and social health.

Design/methodology/approach
A national survey was conducted in China. A total of 1,058 responses were collected from 31 regions of China.

Findings
The regression results show that WeChat addiction is negatively associated with users’ physical, mental, and social health. The negative effects are significant even after adjusting for the effects of the Big Five personality traits, years of using WeChat, and demographic variables such as age, gender, education level, and monthly income. Years of using WeChat is not significantly related to users’ health. It is also found that the influence of WeChat addiction on health outcomes is sensitive to years of WeChat use. The influence is dormant when users have less than three years of WeChat usage, but starts to exhibit itself after three years.

Research limitations/implications
Addictive use of WeChat is associated with declining overall health among Chinese users. Given the cross-sectional nature of this study, definite causal relationship between WeChat addiction and health deterioration cannot be established. Controlled experiments are needed to further examine the causal effects of WeChat addiction.

Originality/value
WeChat is the most popular mobile social network service (SNS) in China, but its comprehensive impact on users’ health is rarely studied. This paper extends the extant research on SNS addiction by providing a deepened understanding of how mobile SNS addiction affects personal health in the unique context of WeChat, which provides an important contribution to the interdisciplinary research in public health, psychology, and information systems.
Relationship between e-servicescape and purchase intention among heavy and light internet users
Authors: Teng Hsu-Ju , Ni Jia-Jen , Chen Hsiao-Han 
Published: February 2018

Purpose
Previous studies of e-servicescapes have considered general internet consumers as the main research subjects; however, some studies have argued that heavy users are the main sources of consumption. Understanding heavy user’s consumption traits is crucial for enhancing company profits; hence, the purpose of this paper is to compare the significant attributes of e-servicescapes and clarify their relationship with purchase intention by employing heavy and light internet users as moderators.

Design/methodology/approach
An online questionnaire was used to collected data from 342 valid internet users with online shopping experience, and the differences were compared through structural equation modeling.

Findings
Aesthetic appeal and interactivity significantly increase general users’ purchase intentions. For heavy users, interactivity was the most crucial factor, followed by esthetic appeal, and then layout and functionality. For light users, Aesthetic appeal was the only crucial factor. The data also reveal that financial security does not have significant positive effects on general, heavy, or light users.

Originality/value
Using the insight gained by integrating purchase intention with e-service quality and segmentation theory in the e-servicescape, the authors display how heavy and light internet users evaluate the e-servicescape for signals of quality attributes and contribute their cognitive response and purchase intention according to different consumption traits. Internet retailers are recommended to segment heavy and light users, redesign their current e-servicescapes, and provide more appropriate marketing strategies to attract and keep heavy and light users and enhance their purchase intentions.
Understanding mobile payment users’ continuance intention: a trust transfer perspective
Authors: Cao Xiongfei , Yu Lingling , Liu Zhiying , Gong Mingchuan , Adeel Luqman 
Published: February 2018

Purpose
The purpose of this paper is to investigate the mechanism of building trust during the transition from online payment to mobile payment, as well as to examine the effect of trust on the satisfaction and continuance intention of mobile payment users. Based on trust transfer theory, this study proposes that trust in online payment (i.e. trust in source) and two source-target relationship factors, namely, perceived similarity and entitativity, affect trust in mobile payment (i.e. trust in target). In turn, the resulting trust influences user satisfaction and continuance intention toward mobile payment in an online-mobile payment context.

Design/methodology/approach
The model was empirically tested on data collected from 219 mobile payment users of a famous payment enterprise in China.

Findings
The results indicated that the trust transfer process positively influences the continuance intention of mobile payment through satisfaction. Satisfaction is an important factor affecting continuance intention. Moreover, trust in online payment, perceived similarity, and perceived entitativity between online and mobile payments can positively influence trust in mobile payment.

Originality/value
This study investigates the post-adoption usage of mobile payment from the trust transfer perspective. It focuses on the trust-building process and emphasizes the importance of trust on the continuance intention toward mobile payment in an online-mobile payment context.
How internal attributions affect knowledge sharing behavior
Authors: Lekhawipat Watcharee , Wei Yu-Huei , Lin Chinho 
Published: February 2018

PurposeThe purpose of this paper is to compare the effects of organizational and technological barriers to knowledge sharing between large and small firms through the lens of attribution theory.Design/methodology/approachThe structural equation modeling approach was applied to estimate the conceptual model by using survey data from a list of Taiwan’s top 1,000 manufacturing and 500 service companies. A total of 229 valid questionnaires were collected.FindingsThe empirical results show that both organizational and technological barriers have relationships with an individual’s effort and ability with regard to knowledge sharing behavior. When organizational barriers occur, the perceived lack of effort has a direct effect on knowledge sharing behavior for large firms, while negative sharing behavior among employees of small firms is influenced by the perception of low ability through the perceived lack of effort.Originality/valueA review of the literature reveals organizational and technological barriers that lead to the negative influences of internal attributions on knowledge sharing. This study, therefore, contributes to a comprehensive perspective on how to encourage knowledge sharing behavior at different sizes of firms.
Academic research meets practice: why controversial results are not controversial
Authors: Wright Patrick M. , Nyberg Anthony J. 
Published: February 2018

Purpose
This paper aims to explore some of the practical challenges boards face in setting chief executive officer (CEO) pay to show why the failure to see considerable overlap between pay and performance may not be due to poor governance.

Design/methodology/approach
This paper critically explores the different types of pay reported in public sources (actual vs realized) and the types of performance measures used in CEO pay research. This paper then conceptually reviews the broader governance responsibility of boards, particularly the hiring and firing of CEOs and the impact these decisions have on CEO pay.

Findings
The authors suggest that much of the lack of overlap between pay and performance may be because of misaligned timing of the pay and performance measures, differences between internally promoted and externally hired CEOs and severance packages of fired CEOs. They conclude that the lack of overlap may not signal failure on the part of boards, but rather may reflect the risk and uncertainty those boards face in hiring and firing of CEOs.

Research limitations/implications
The analysis shows how using publicly available sources of pay and performance data ignores the practical challenges that boards face in setting pay, and suggests greater care be given to future research purporting to show that boards are failing in their governance responsibilities.

Practical implications
CEO pay may not be as misaligned with performance as many researchers conclude, but may be due to the risks and uncertainty inherent in governance.

Social implications
The distributive justice critique of CEO pay may not be valid.

Originality/value
As opposed to simply mining public databases, this paper more accurately describes some of the variables that impact how boards set CEO pay.
The two sides of CEO pay injustice: a commentary
Authors: Cannella Albert , Sy Valerie 
Published: February 2018

PurposeThe purpose of this paper is to extend discussions in the CEO compensation research domain. Specifically, this paper provides a critical analysis of the power law conceptualization and pay injustice contribution by Aguinis, Martin, Gomez-Mejia, O’Boyle and Joo.Design/methodology/approachThis commentary addresses statistical and theoretical issues of the power law distribution with respect to prior compensation research and offers additional perspectives on the issue of CEO pay deservingness.FindingsThe power law is worth investigating further, but more attention should be paid to outliers and fit to the distribution. Stronger theory is needed for using the power law to explain CEO compensation phenomena, especially regarding standard firm performance measures and anomalies in the compensation process. Finally, “injustice” and “deservingness” in discussions of CEO pay exist in the eye of the beholder.Originality/valueThis paper offers additional considerations for scholars to explore when applying the power law distribution to compensation research.
Timing of mutualist arrival has a greater effect on Pinus muricata seedling growth than interspecific competition
Authors: Peay Kabir G. 
Published: February 2018

Abstract

Interactions with symbiotic microbes, such as mycorrhizal fungi, have the potential to greatly influence plant growth, but it is unclear whether field variation in symbiont availability is common and, if so, sufficient to influence interspecific plant competition.

In a greenhouse experiment using natural field soils, I varied the timing of ectomycorrhizal inoculation and the presence of an arbuscular mycorrhizal plant competitor, and measured their effects on pine seedling growth.

I found that ectomycorrhizal colonization was absent in some field soils, and that in soils without mycorrhizal inoculum, delayed arrival of ectomycorrhizal spores progressively reduced pine seedling growth and favoured growth of the competitor. Competition had significant negative effects on pine seedling growth, but the competition effect was much smaller than the effect of delayed mutualist arrival.

Synthesis. The importance of mycorrhizal spore arrival time on pine growth suggests that plants may experience mutualist limitation more frequently than previously expected, and the relative magnitude of seedling responses to mycorrhizal fungi and competing plants show that in some systems mutualism is likely of equal or greater importance compared with interspecific competition in affecting plant community assembly.
Oxytocin structure and function in New World monkeys: from pharmacology to behavior
Authors: MUSTOE Aaryn , TAYLOR Jack H. , FRENCH Jeffrey A. 
Published: February 2018

AbstractOxytocin (OT) is a hypothalamic nonapeptide that mediates a host of physiological and behavioral processes including reproductive physiology and social attachments. While the OT sequence structure is highly conserved among mammals, New World monkeys (NWMs) represent an unusual “hot spot” in OT structure variability among mammals. At least 6 distinct OT ligand variants among NWMs exist, yet it is currently unclear whether these evolved structural changes result in meaningful functional consequences. NWMs offer a new area to explore how these modifications to OT and its canonical G‐protein coupled OT receptor (OTR) may mediate specific cellular, physiological and behavioral outcomes. In this review, we highlight relationships between OT ligand and OTR structural variability, specifically examining coevolution between OT ligands, OTRs, and physiological and behavioral phenotypes across NWMs. We consider whether these evolved modifications to the OT structure alter pharmacological profiles at human and marmoset OTRs, including changes to receptor binding, intracellular signaling and receptor internalization. Finally, we evaluate whether exogenous manipulation using OT variants in marmoset monkeys differentially enhance or impair behavioral processes involved in social relationships between pairmates, opposite‐sex strangers, and parents and their offspring. Overall, it appears that changes to OT ligands in NWMs result in important changes ranging from cellular signaling to broad measures of social behavior.
What happens to the unsuccessful spermatozoa?
Authors: Engel K. M. , Springsguth C. H. , Grunewald S. 
Published: February 2018

SummaryTo study apoptosis as a functional pathway in mature spermatozoa and apoptosis correlated to the acrosome reaction via the intracellular calcium concentration, semen samples from 27 healthy human donors were treated with inducers of apoptosis (betulinic acid, thapsigargin), inducers of the acrosome reaction (thapsigargin, calcium ionophore) or hydrogen peroxide to produce reactive oxygen species with and without prior incubation with a calcium chelator. Computer‐assisted sperm analysis, flow cytometry, and transmission electron microscopy were performed to analyze changes in the acrosomal status and in apoptotic features. Betulinic acid, thapsigargin, and the calcium ionophore treatment resulted in an increased number of sperm cells with caspase 9 and caspase 3 activation, disrupted mitochondrial membrane potential, and a reacted acrosome. Sperm motility was decreased in all cases. Transmission electron analyses showed ultra‐morphological changes, such as membrane integrity, membrane blebbing, the formation of head vacuoles, defects of the nuclear envelope, nuclear fragmentation, and the acrosome reaction. Acrosome reaction and apoptotic features decreased due to the reduction in intracellular calcium by the calcium chelator NP‐EGTA, AM. Therefore, apoptotic cell death in acrosome‐reacted sperm cells mediated by high intracellular calcium levels is possible.
Evaluation of the Novel Centrifugal Pump, CAPIOX SL, in Chronic Large Animal Experiments
Authors: Iizuka Kei , Katagiri Nobumasa , Takewa Yoshiaki , Tsukiya Tomonori , Mizuno Toshihide , Itamochi Yosuke , Kumano Kouko , Tatsumi Eisuke 
Published: February 2018

AbstractIn the development of a new device for extracorporeal circulation, long‐term durability and biocompatibility are required. The CAPIOX SL Pump (SL pump, Terumo Corporation, Tokyo, Japan), which is a centrifugal pump using a two‐pivot bearing, was developed with the hope of suppressing pump thrombus formation around the bearings. This study aimed to evaluate the in vivo performance of the SL pump in the condition assumed severe clinical situation for long‐term extracorporeal membrane oxygenation (ECMO) support. Extracorporeal circulation using the SL pump was installed in three goats, with drainage from the inferior vena cava and infusion into the right jugular artery. The animals were maintained with target pump flow of 2.0–3.0 L/min for 3 or 7 days. Anticoagulation was performed by continuous infusion of heparin with a target activated coagulation time (ACT) of 200 ± 50 s. Blood tests were performed regularly. After 3 or 7 days, autopsies were performed on all animals. The pumps were disassembled and observed for thrombus formation. The results were compared with those of our previous study of the current model of the centrifugal pump (SP pump). All animals were successfully managed within target pump flows and ACT values during the scheduled period, with no adverse events. No thrombus formation was found around the bearing of the SL pump. The blood tests showed normal major organ functions, and platelet consumption and hemolysis were significantly lower in this study compared to the previous study of the SP pump. The CAPIOX SL Pump showed excellent durability and biocompatibility in a large animal experiment.
An examination of gender and situational interest in multimedia learning environments
Authors: Dousay Tonia A. , Trujillo Natasha P. 
Published: February 2018

AbstractExisting research highlights conflicting results attempting to capture gender preferences with respect to unimodal versus multimodal designs in online learning. As online learning continues to expand, more research examining the role of gender in multimedia design holds considerable potential. However, the presence of multimedia in online learning contexts presents a more complex problem when taking into consideration the concept of learner interest. The current study sought to investigate gender differences in situational interest (SI) with respect to three different but related designs of an online, multimedia learning environment for continuing, professional education in emergency medical services. The content in these designs was identical, but applied different combinations of the redundancy and modality multimedia principles. A two‐way analysis of variance was used to examine the types of SI by gender and type of multimedia design. While no significant difference or interaction effect was identified between gender and triggered SI, an interaction effect was observed for females and the different multimedia designs. Specifically, females reported a higher maintained SI when animation, narration and text were effectively combined. The findings of this study provide insight into best practices for instructional and media designers developing multimedia learning environments as well as future research implications.
Progression and treatment rates using an active surveillance protocol incorporating image‐guided baseline biopsies and multiparametric magnetic resonance imaging monitoring for men with favourable‐risk prostate cancer
Authors: Thurtle David , Barrett Tristan , Thankappan‐Nair Vineetha , Koo Brendan , Warren Anne , Kastner Christof , Saeb‐Parsy Kasra , Kimberley‐Duffell Jenna , Gnanapragasam Vincent J. 
Published: February 2018

ObjectiveTo assess early outcomes since the introduction of an active surveillance (AS) protocol incorporating multiparametric magnetic resonance imaging (mpMRI)‐guided baseline biopsies and image‐based surveillance.Patients and MethodsA new AS protocol mandating image‐guided baseline biopsies, annual mpMRI and 3‐monthly prostate‐specific antigen (PSA) testing, but which retained protocol re‐biopsies, was tested. Pathological progression, treatment conversion and triggers for non‐protocol biopsy were recorded prospectively.ResultsData from 157 men enrolled in the AS protocol (median age 64 years, PSA 6.8 ng/mL, follow‐up 39 months) were interrogated. A total of 12 men (7.6%) left the AS programme by choice. Of the 145 men who remained, 104 had re‐biopsies either triggered by a rise in PSA level, change in mpMRI findings or by protocol. Overall, 23 men (15.9%) experienced disease progression; pathological changes were observed in 20 men and changes in imaging results were observed in three men. Of these 23 men, 17 switched to treatment, giving a conversion rate of 11.7% (<4% per year). Of the 20 men with pathological progression, this was detected in four of them after a PSA increase triggered a re‐biopsy, while in 10 men progression was detected after an mpMRI change. Progression was detected in six men, however, solely after a protocol re‐biopsy without prior PSA or mpMRI changes. Using PSA and mpMRI changes alone to detect progression was found to have a sensitivity and specificity of 70.0% and 81.7%, respectively.ConclusionOur AS protocol, with thorough baseline assessment and imaging‐based surveillance, showed low rates of progression and treatment conversion. Changes in mpMRI findings were the principle trigger for detecting progression by imaging alone or pathologically; however, per protocol re‐biopsy still detected a significant number of pathological progressions without mpMRI or PSA changes.