bluuebunny/crossref_metadata_2025_split huggingface dataset:
Peer mentoring in entrepreneurship education: towards a role typology
Authors: Kubberød Elin , Fosstenløkken Siw M. , Erstad Per Olav 
Published: October 2018

PurposeThe purpose of this paper is to explore the contributions of peer mentoring as a learning support for mentee students in higher entrepreneurship education.Design/methodology/approachThis paper presents a single embedded case study focussing on mentee students’ perceptions of peer mentors’ support of their entrepreneurial learning during an experiential master’s course. Employing an abductive approach, the researchers conducted cross-sectional, thematic analyses of individual mentee interviews complemented by data from joint reflection sessions, reflection reports and observations during the course timeline.FindingsThe peer mentors contributed to the mentee students’ learning through various forms of support, which were categorised into mentor roles, mentor functions and intervention styles. The analysis found that peer mentors fulfil three coexisting roles: learning facilitator, supportive coach and familiar role model. These roles constitute the pillars of a typology of entrepreneurial peer mentoring.Research limitations/implicationsThis study contributes theoretical and empirical insights on peer mentoring in entrepreneurship education. It represents a first benchmark of best practices for future studies.Practical implicationsThe case study suggests that adding peer mentoring represents more efficient support for entrepreneurial learning than a teacher alone is able to provide. The typology can also be used for training peer mentors.Originality/valueThe researchers construct a new typology for entrepreneurial learning support, which contributes to theory development within the field of entrepreneurship education.
Control dimensions, job demands and job satisfaction: does ownership matter?
Authors: Lindfors Petra , Hansen Niklas 
Published: October 2018

Purpose
New ownership types in health care of welfare states raise concerns regarding psychosocial work conditions including different control dimensions. The purpose of this paper is to investigate how job demands, control over work and control within work (CWW) were related to job satisfaction in publicly administered, private non-profit and private for-profit hospitals.

Design/methodology/approach
Questionnaire data came from employees at three hospitals; a publicly administered (n=774), a private non-profit (n=1,481) and a private for-profit (n=694) hospital. Mean-level analyses and hierarchical regressions with multiple group tests were conducted.

Findings
Demands including workload were significantly lower at the publicly administered hospital while the control dimension CWW was significantly higher. Background factors and their associations with job satisfaction differed slightly between ownership types. Attitudes to privatization were not associated with job satisfaction within any ownership type. Overall, psychosocial work characteristics, including job demands and control, were significantly associated with job satisfaction while their interactions showed no consistent associations with job satisfaction. As for the strength of the associations, no consistent differences emerged between ownership types.

Research limitations/implications
Using self-reports only, the associations between psychosocial work characteristics and job satisfaction seemed comparable across ownership types.

Practical implications
Associations between psychosocial work characteristics and job satisfaction seem comparable across ownership types. This may relate to societal demands on the structuring of costs, work and production efficiency being similar for all.

Originality/value
Contributions include researching different occupations and their attitudes to privatization and two control dimensions considered important for different ownership types.
Sustainability adoption in project management practices within a social enterprise case
Authors: Shah Satya , Naghi Ganji Elmira 
Published: October 2018

Purpose
The purpose of this paper is to present the preliminary findings on the use of sustainable project management practices within social enterprise projects. The research gaps within this field have proposed the authors to address the challenges rising from lack of sustainable infrastructures in social-based projects both within for-profit and non-profit organisations. On the other side, behavioural needs and sustainable awareness of different stakeholders will be examined.

Design/methodology/approach
Secondary research consists of conducting a literature review clarifying the existing knowledge of the research topic within the body of literature. The stakeholders’ behavioural needs towards acting and implementing sustainable practices led to the adoption of sustainable practices within projects which are managed across profit and non-profit organisations.

Findings
The lack of sustainable behaviour and its adoption within organisations is also highlighted. The limitation of the research is the importance of integration of sustainable development (SD) within social projects. Such projects were identified as the drivers towards educating the society towards future generations’ sustainability awareness. However, if the adoption of sustainable practices is well established in some sectors (such as construction), literature tends to demonstrate a lack of information regarding other sectors, especially within social enterprises.

Originality/value
The novelty of the research is to develop an early understanding regarding linkages between sustainable practices and project management programmes within the social projects. The particular focus is given to corporate social responsibility and the comparative analysis has been made among for-profit and non-profit organisations in terms of SD metrics. The study results would be beneficial to the researchers and practitioners exploring within the same field.
Occasional long distance dispersal increases spatial synchrony of population cycles
Authors: Hopson Jessica , Fox Jeremy W. 
Published: October 2018

Abstract

Spatially separated populations of the same species often exhibit correlated fluctuations in abundance, a phenomenon known as spatial synchrony. Dispersal can generate spatial synchrony. In nature, most individuals disperse short distances with a minority dispersing long distances. The effect of occasional long distance dispersal on synchrony is untested, and theoretical predictions are contradictory. Occasional long distance dispersal might either increase both overall synchrony and the spatial scale of synchrony, or reduce them.

We conducted a protist microcosm experiment to test whether occasional long distance dispersal increases or decreases overall synchrony and the spatial scale of synchrony.

We assembled replicate 15‐patch ring metapopulations of the protist predator Euplotes patella and its protist prey Tetrahymena pyriformis. All metapopulations experienced the same dispersal rate, but differed in dispersal distance. Some metapopulations experienced strictly short distance (nearest neighbour) dispersal, others experienced a mixture of short‐ and long distance dispersal.

Occasional long distance dispersal increased overall spatial synchrony and the spatial scale of synchrony for both prey and predators, though the effects were not statistically significant for predators. As predicted by theory, dispersal generated spatial synchrony by entraining the phases of the predator–prey cycles in different patches, a phenomenon known as phase locking.

Our results are consistent with theoretical models predicting that occasional long distance dispersal increases spatial synchrony. However, our results also illustrate that the spatial scale of synchrony need not match the spatial scale of the processes generating synchrony. Even strictly short distance dispersal maintained high spatial synchrony for many generations at spatial scales much longer than the dispersal distance, thanks to phase locking.
Multiple density‐dependent processes shape the dynamics of a spatially structured amphibian population
Authors: Cayuela Hugo , Schmidt Benedikt R. , Weinbach Avril , Besnard Aurélien , Joly Pierre 
Published: October 2018

Abstract

Understanding the mechanisms that regulate the dynamics of spatially structured populations (SSP) is a critical challenge for ecologists and conservation managers. Internal population processes such as births and deaths occur at a local level, while external processes such as dispersal take place at an inter‐population level. At both levels, density dependence is expected to play a critical role. At a patch scale, demographic traits (e.g., survival, breeding success) and the population growth rate can be influenced by density either negatively (e.g., competition effect) or positively (e.g., Allee effects). At the scale of an SSP, although positive density‐dependent dispersal has been widely reported, an increasing number of studies have highlighted negative density‐dependent dispersal.

While many studies have investigated the effects of density on population growth or on dispersal, few have simultaneously examined density‐dependent effects at the scale of both the local population and the entire SSP. In this study, we examine how density is related to demographic processes at both the pond level (survival and population growth) and the SSP level (between‐pond dispersal) in a pond‐breeding amphibian, the great crested newt (Triturus cristatus). The study was based on 20 years of individual capture–recapture (CR) data (from 1996 to 2015) gathered from an SSP made up of 12 experimental ponds (“patches”).

We first used a CR multievent model to estimate both survival and dispersal rates in specific ponds as a function of distance between ponds. Then, using a second CR multievent model, we examined whether survival and recapture rates were influenced by population density in a pond. Lastly, we used state‐space time series models to investigate whether density affected population growth in each pond.

Our results found a positive density‐dependent effect on survival and a negative density‐dependent effect on departure. In addition, the findings indicate that population growth was negatively related to density in all 12 ponds.

These results support the hypothesis that in SSPs, density may have multiple and contrasting effects on demographic parameters and growth rates within local populations as well as on dispersal. This study underlines the need to better understand how density dependence may influence potential trade‐offs between life‐history strategies and life‐history stages.
Predicting tubal factor infertility by using markers of humoral and cell‐mediated immune response against Chlamydia trachomatis
Authors: Rantsi Tiina , Öhman Hanna , Puolakkainen Mirja , Bloigu Aini , Paavonen Jorma , Surcel Heljä‐Marja , Tiitinen Aila , Joki‐Korpela Päivi 
Published: October 2018

ProblemThe accuracy of Chlamydia trachomatis antibody test in predicting tubal factor infertility (TFI) is limited, and more accurate methods are needed. Cell‐mediated immune response (CMI) is crucial in the resolution of pathogen, but it may play an important role in the pathogenesis of C trachomatis‐associated tubal damage. We studied whether combining the markers of C trachomatis‐induced CMI to humoral immune response improves the accuracy of serology in TFI prediction.Method of studyOur prospective study consists of 258 subfertile women, of whom 22 (8.5%) had TFI. Women with other causes for subfertility served as a reference group. Serum C trachomatis major outer membrane protein (MOMP) and chlamydial heat‐shock protein 60 (cHSP60) IgG antibodies were measured by ELISA. CMI was studied by lymphocyte proliferation assay in vitro.ResultsSerological markers were more prevalent in women with TFI than in other subfertile women (40.9% vs 12.3% for MOMP IgG and 27.3% vs 10.2% for cHSP60 IgG). The best test combination for TFI was C. trachomatis MOMP and cHSP60 antibody with an accuracy of 90.3%, sensitivity of 22.7% and specificity of 96.6%. Positive post‐test probability of this combination was 54.2%, and negative post‐test probability was 12.4%. Adding of the markers of CMI did not significantly improve the accuracy of serology in TFI prediction.ConclusionThe accuracy of TFI prediction increases when the combination of C trachomatis MOMP and cHSP60 antibody tests is used. C trachomatis‐induced CMI was common in our study population, but the markers of CMI did not predict TFI.
Proteomic analysis of posterior capsular plaques in congenital unilateral cataract
Authors: Van Looveren Jan , Van Gerwen Veerle , Schildermans Karin , Laukens Kris , Baggerman Geert , Tassignon Marie‐José 
Published: October 2018

AbstractPurposeTo obtain insights on the protein composition of posterior capsular plaques (PCP) in congenital unilateral cataract with anterior vitreolenticular interface dysgenesis (AVLID).MethodsPosterior capsular plaque's were collected during surgery in children presenting with congenital unilateral cataract. Surgeries were analysed focusing on the type of cataract, the integrity of the posterior capsule after peeling the PCP and the presence of vitreolenticular adherences when performing primary posterior capsulorhexis. Proteome analysis was performed on the collected PCPs.ResultsPosterior capsular plaques collection and proteome analysis were feasible from four children presenting with unilateral idiopathic congenital cataract and AVLID. A large portion of the proteins found in the PCPs was similar to the proteins known to be present in lens epithelial cells and fibres. Proteins like vimentin, fibronectin, collagen type I, collagen type VI and lumican were also found, which typically are present in mesenchymal tissue but not in lens tissue or capsule.ConclusionPosterior capsular plaques in cases of unilateral idiopathic congenital cataract of the AVLID type present a protein composition of mainly proteins found in lens epithelial cells and fibres. Some proteins however are a specific for lens tissue and are typically seen in mesenchymal tissue.
Understanding an emerging treatment population: Protocol for and baseline characteristics of a prospective cohort of people receiving treatment for pharmaceutical opioid dependence
Authors: Nielsen Suzanne , Lintzeris Nicholas , Murnion Bridin , Degenhardt Louisa , Bruno Raimondo , Haber Paul , Johnson Jennifer , Hardy Mark , Ling Stephen , Saddler Craig , Dunlop Adrian , Demirkol Apo , Silsbury Catherine , Phung Nghi , Houseman Jennie , Larance Briony 
Published: October 2018

AbstractIntroduction and AimsDespite large increases in pharmaceutical opioid dependence and related mortality, few studies have focused on the characteristics and treatment experiences of those with pharmaceutical opioid dependence. We describe the formation of a prospective cohort of people receiving treatment for pharmaceutical opioid dependence and describe their baseline characteristics.Design and MethodsPeople who had entered treatment for pharmaceutical opioid dependence (n = 108) were recruited through drug treatment services in New South Wales, Australia. We describe baseline characteristics of those that commenced pharmaceutical opioids for pain or other reasons and conducted a thematic analysis of responses regarding their treatment experience.ResultsMean age was 41 years (SD 11), half were male (48%). Just over half reported lifetime heroin use (57%). Oxycodone (49%) and codeine (29%) were the most common opioids reported. Most (85%) reported past‐year problematic pain, 38% reported chronic pain. Half (52%) reported moderate to severe depression symptoms. Most (66%) commenced opioids for pain, and this group were older, less likely to report a previous overdose and less likely to report use of illicit drugs compared to those commencing for other reasons. Five themes related to treatment expectations: (i) stigma; (ii) the restrictive nature of treatment; (iii) knowledge; (iv) pain; and (v) positive experience with buprenorphine.Discussion and ConclusionsThis study describes the complexities in an important emerging treatment population of pharmaceutical opioid‐dependent people. Findings highlights that addressing knowledge and perceptions around treatment may be critical to address the rising mortality associated with pharmaceutical opioid dependence.
The role of the cerebellum in drug‐cue associative memory: functional interactions with the medial prefrontal cortex
Authors: Gil‐Miravet Isis , Guarque‐Chabrera Julian , Carbo‐Gas Maria , Olucha‐Bordonau Francisco , Miquel Marta 
Published: October 2018

AbstractDrug‐induced Pavlovian memories are thought to be crucial for drug addiction because they guide behaviour towards environments with drug availability. Drug‐related memory depends on persistent changes in dopamine‐glutamate interactions in the medial prefrontal cortex (mPFC), basolateral amygdala, nucleus accumbens core and hippocampus. Recent evidence from our laboratory indicated that the cerebellum is also a relevant node for drug‐cue associations. In the present study, we tested the role that specific regions of the cerebellum and mPFC play in the acquisition of cocaine‐induced preference conditioning. Quinolinic acid was used to manage a permanent deactivation of lobule VIII in the vermis prior to conditioning. Additionally, lidocaine was infused into the prelimbic and infralimbic (IL) cortices for reversible deactivation before every training session. The present findings show, for the first time, that the cerebellum and mPFC might act together in order to acquire drug‐cue Pavlovian associations. Either a dorsal lesion in lobule VIII or an IL deactivation encouraged cocaine‐induced preference conditioning. Moreover, simultaneous IL‐cerebellar deactivation prevented the effect of either of the separate deactivations. Therefore, similar to the IL cortex, neural activity in the cerebellum may be crucial for ensuring inhibitory control of the expression of cocaine‐related memories.
Improving Volatility Forecasts Using Market‐Elicited Ambiguity Aversion Information
Authors: So Raymond H.Y. , Driouchi Tarik 
Published: October 2018

AbstractDistinguishing between risk and uncertainty, this paper proposes a volatility forecasting framework that incorporates asymmetric ambiguity shocks in the (exponential) generalized autoregressive conditional heteroskedasticity‐in‐mean conditional volatility process. Spanning 25 years of daily data and considering the differential role of investors' ambiguity attitudes in the gain and loss domains, our models capture a rich set of information and provide more accurate volatility forecasts both in‐sample and out‐of‐sample when compared to ambiguity‐free or risk‐based counterparts. Ambiguity‐based volatility‐timing trading strategies confirm the economic significance of our proposed framework and indicate that an annualized excess return of 3.2% over the benchmark could be earned from 1995 to 2014.
Vitamin D insufficiency predicts mortality among older men, but not women: A nationwide retrospective cohort from Thailand
Authors: Srinonprasert Varalak , Chalermsri Chalobol , Chailurkit La‐or , Ongphiphadhanakul Boonsong , Aekplakorn Wichai 
Published: October 2018

AimPrevious studies on the association between low vitamin D level and increased mortality mainly came from high‐income countries. The primary objective of the present study was to examine the effect of sex on the association between 25‐hydroxyvitamin D2 and D3 and mortality among community‐dwelling older people in Thailand.MethodsA cohort of individuals aged ≥60 years from the Thai 4th National Health Examination Survey carried out in 2008 were followed and linked to a vital registry in 2015. Data regarding comorbid diseases, physical activity and serum vitamin D were obtained at the baseline assessment. Factors associated with all‐cause mortality were determined using Cox proportional hazards models.ResultsA total of 1268 participants with a median age of 74.0 years (interquartile range 67.0–81.0) were included. The prevalence of vitamin D insufficiency was 24.5% and 43.9% in men and women, respectively. Vitamin D insufficiency was significantly associated with all‐cause mortality only among men (adjusted HR 1.77, 95% CI 1.25–2.51), but not women. Analysis of 25‐hydroxyvitamin D3 divided into tertiles also showed an association with an adjusted HR of 1.83 (95% CI 1.23–2.72) for the lowest tertile in men. Diabetes was an effect modifier for low serum vitamin D and male sex, with HR 3.34 (95% CI 1.76–6.33, P < 0.001) in diabetic men with vitamin D insufficiency.ConclusionsLow serum vitamin D is an independent risk factor for increased mortality in community‐dwelling Thai older men. Further randomized controlled study to investigate the benefit of vitamin D3 supplementation in older persons, particularly men, is warranted. Geriatr Gerontol Int 2018; 18: 1585–1590.
CITY EQUILIBRIUM WITH BORROWING CONSTRAINTS: STRUCTURAL ESTIMATION AND GENERAL EQUILIBRIUM EFFECTS
Authors: Ouazad Amine , Rancière Romain 
Published: October 2018

AbstractThis article develops a general equilibrium model of location choice where mortgage approval rates determine household‐specific choice sets. Estimation of the model using San Francisco Bay area data reveals that the price sensitivity of borrowing constraints explains about two‐thirds of the price elasticity of neighborhood demand. General equilibrium analysis of the 2000–2006 relaxation of lending standards predicts the following impacts on prices and neighborhood demographics: (i) an increase in house prices accompanied by a compression of the price distribution and (ii) a reduction in the isolation of Whites reflecting gentrification. Both predictions are supported by empirical observation.
NETWORK SEARCH: CLIMBING THE JOB LADDER FASTER
Authors: Arbex Marcelo , O'Dea Dennis , Wiczer David 
Published: October 2018

AbstractWe introduce an irregular network structure into a model of frictional, on‐the‐job search in which workers find jobs through their network connections or directly from firms. We show network‐found jobs have higher wages, and thus better‐connected workers climb the job ladder faster. The mean field approach allows us to formulate heterogeneous workers' recursive problem tractably. Our calibration is consistent with several empirical findings because of a composition—not information—effect. We also introduce new model‐consistent evidence: Job‐to‐job switches at higher ladder rungs are more likely to use networks.