bluuebunny/crossref_metadata_2025_split huggingface dataset:
University dropouts vs high school graduates in the school-to-work transition
Authors: Ghignoni Emanuela , Croce Giuseppe , d’Ambrosio Alessandro 
Published: January 2019

PurposeThe purpose of this paper is to consider the enrolment at university and the subsequent possible dropout as a piece of the school-to-work transition and ask whether it improves or worsens the labour market outcomes a few years after graduation from the high school.Design/methodology/approachThe analysis exploits data from the upper secondary graduate survey by ISTAT on a cohort of high school graduates and investigates the effect of dropping out four years after graduation. The labour market outcomes of university dropouts are compared to the outcomes of high school graduates who never enrolled at university. A propensity score matching approach is applied. The model is also estimated on the subsamples of males and females.FindingsThe findings show that spending a period at university and leaving it before completion makes the transition to work substantially more difficult. Both the probability of being NEET and getting a bad job increase in the case of dropout, while no relevant effect is found on earnings. Moreover, the impact of university dropout tends to be more harmful the longer the spell from enrolment to dropping out. Separate estimates by gender point out that females appear to be relatively more affected in the case of dropping out without a fallback plan.Originality/valueWhile the existing studies in the literature on the school-to-work transition mostly focus on the determinants of the dropout, this paper investigates whether and how the employment outcomes are affected by dropping out in Italy. Moreover, university dropouts are compared to high school graduates with no university experience, rather than to university graduates. Finally, evidence on the mechanisms driving the effect of dropping out is provided, by considering timing and motivations for dropping out.
Dynamic behavior of concrete filled steel tubular columns
Authors: Boukhalkhal Said Hicham , Ihaddoudène Abd Nacer Touati , Da Costa Neves Luis Filipe , Madi Wafa 
Published: January 2019

Purpose
The purpose of this paper is to investigate the static and dynamic inelastic response of rigid and semi-rigid connections of steel structures with concrete-filled steel tube (CFST) columns built in high seismic areas, and to compare it with those with open section columns.

Design/methodology/approach
CFST columns are frequently used in moment resistant steel frames located in seismic areas due to their inherent advantages, including their ductility, energy absorption capacity as well as their high bearing capacity. The smart combination of steel and concrete makes it possible to benefit from the advantages of both components to the maximum. This research work presents the nonlinear dynamic response of moment resistant steel frames with CFST columns, with rigid or semi-rigid connections, built in high seismic areas, according to the Algerian seismic code RPA 99/2003, European EC8 and American FEMA 356 to show the nonlinear characteristics of this type of structures, and their advantages over steel frames with open section columns.

Findings
The paper presents the advantages of using CFST columns with rigid and semi-rigid connections on the seismic response of portal steel frames. A high performance level in terms of ductility, plastic hinges distribution and their order of appearance has been obtained. It also shows the low effect of seismic loading on the structural elements with CFST columns compared to structures with open section columns.

Originality/value
The investigation of the numerical results has shown the possibility of their use in the seismic areas for their adequate performance, and also with respect to the design limits specified in the seismic guidelines. In addition, this study represents a first step to develop seismic performance factors for steel structures with CFST columns in Algeria, where the Algerian code do not include a comprehensive specification for the composite steel structures.
Sensitivity analysis of beam–column joint rotation angles with respect to the stiffnesses of the columns of frame structures
Authors: Li Lin 
Published: January 2019

Purpose
Damage detection of frame structures is important for guaranteeing the safety of people’s lives and property. Sensitivity analysis is an effective method for damage identification. The purpose of this paper is to conduct a sensitivity analysis of beam–column joint rotation angles for frame structures with limited flexural stiffness beams.

Design/methodology/approach
First, based on the D-value method and the assumption of inflection points, statically indeterminate frames were transformed to statically determinate structures, and the expressions of beam–column joint rotation angles were derived. Next, the sensitivity coefficients of beam–column joint rotation angles were obtained by taking the derivative of the expressions of beam–column joint rotation angles with respect to the linear stiffness of column. Finally, the expressions of the sensitivity coefficients were verified by a numerical example.

Findings
The analytical solutions of the sensitivity coefficients are in good agreement with finite element results. The results show that the beam–column joint rotation angles of damaged column decrease and those of intact columns within the same story increase when damage occurs.

Originality/value
In this study, the sensitivity coefficients of beam–column joint rotation angles with respect to the linear stiffnesses of columns were derived for frame structures. Based on the result of the sensitivity analysis, the relationship between the changes of beam–column joint rotation angles and damaged columns is revealed. The findings provide an important base to further detect damage of frame structures.
Learning, connectivity and networks
Authors: Haythornthwaite Caroline 
Published: January 2019

PurposeThis is paper is concerned with the learning outcomes associated with connectivity through online networks, open online exchange and wider changes associated with contemporary information practices. The theme of connectivity is used here to capture both the detailed specificity of relations that define networks of learners and the ambient effect of wide accessibility to resources and people through open, online forums.Design/methodology/approachThe paper follows the idea of a network from the ground up, outlining the social network perspective as a way to consider the foundational bases of learning and networks, as well as the effect of ambient influence. The paper addresses the ways learning may be viewed as a social network relation, an interpersonal relationship and an outcome of interaction and connectivity, and how network connectivity can be used as input for design for learning.FindingsThe paper presents a range of perspectives and studies that view learning from a social network and connectivity perspective, emphasizing both the person-to-person connectivity of a learning tie and the impact of contemporary data and information sharing through the dynamics of open contributory practice.Practical implicationsThe outcome of connectivity in the service of learning is bound up with digital information practices, including individual practices of search, retrieval, participation, knowledge dissemination, knowledge construction and more. This paper provides a network perspective on learning relations that accommodates analysis in online and offline environments, but incorporates attention to the open, online retrieval and contributory practices that now influence learning practices and which may support design of new learning environments.Originality/valueThis paper offers insight into the way social networks and connectivity combine to show network relations, relationships, outcomes and design input at the actor, network and societal levels.
Reducing skepticism about corporate social responsibility: roles of gender and agentic-communal orientations
Authors: Newman Kevin P. , Trump Rebecca K. 
Published: January 2019

PurposeCompanies are increasingly emphasizing corporate social responsibility (CSR). However, consumers are often skeptical of the sincerity of companies’ CSR claims, particularly when the claim comes directly from the company. This paper aims to demonstrate how to reduce consumer CSR skepticism by examining the role of a company spokesperson’s gender and gender-related characteristics.Design/methodology/approachTwo between-subjects experiments with a combined total of 329 participants examined how consumers’ levels of CSR skepticism are affected depending on the gender of the consumer and the gender and gender-related characteristics of the company’s CSR spokesperson.FindingsStudy 1 finds that a female (vs male) spokesperson generally elicits less CSR skepticism. However, Study 2 expands on this to demonstrate that consumers are less skeptical of a company’s CSR efforts when they are promoted by a spokesperson who exhibits gender-related characteristics that match, or are typically associated with, the individual consumer’s gender.Practical implicationsBrands often face difficulties in successfully promoting their own CSR efforts to skeptical consumers. These findings should guide companies and their brands in choosing ideal spokespeople for making effective, sincere CSR claims, depending on the target market.Originality/valueThis research is the first to identify the important role of gender in consumers’ perceptions of CSR sincerity. Thus, it provides practically-oriented strategies that may mitigate a growing consumer CSR skepticism that exists in today’s marketplace.
The impact of downside risk on UK stock returns
Authors: Huang Fangzhou 
Published: January 2019

PurposeThis paper aims to investigate patterns in UK stock returns related to downside risk, with particular focus on stock returns during financial crises.Design/methodology/approachFirst, stocks are sorted into five quintile portfolios based on the relevant beta values (classic beta, downside beta and upside beta, calculated by the moving window approach). Second, patterns of portfolio returns are examined during various sub-periods. Finally, predictive powers of beta and downside beta are examined.FindingsThe downside risk is observed to have a significant positive impact on contemporaneous stock returns and a negative impact on future returns in general. In contrast, an inverse relationship between risk and return is observed when stocks are sorted by beta, contrary to the classic literature. UK stock returns exhibit clear time sensitivity, especially during financial crises.Originality/valueThis paper focuses on the impact of the downside risk on UK stock returns, assessed via a comprehensive sub-period analysis. This paper fills the gap in the existing literature, in which very few studies examine the time sensitivity in relation to the downside risk and the risk-return anomaly in the UK stock market using a long sample period.
The effects of lines of credit on market timing and the underpricing of seasoned equity offerings
Authors: Ngo Anh , Varela Oscar , Feixue Xie 
Published: January 2019

PurposeThis paper aims to examine the effects of lines of credit on a firm’s market timing behavior and the pricing of its seasoned equity offerings (SEOs). It shows that firms with lines of credit are more likely to time the equity market and receive less underpricing for their SEOs. It also shows that the propensity of firms with lines of credit to time the market is particularly significant for financially unconstrained firms. The results are robust to different measures of market timing and financial constraint, and these fill the gap in the literature that, to the best of the authors’ knowledge, has not examined the relation between lines of credit, market timing and value creation as related to equity offerings.Design/methodology/approachThe paper first investigates the relationship between lines of credit and the probability of a firm issuing SEOs using a logistic model. The paper then investigates whether firms with lines of credit engage in market timing behavior using ordinary least square regressions with two-way cluster-robust standard errors (standard errors that are robust to simultaneous correlation along two dimensions, such as firms and time) with two measures of market timing and two measures for financial constraints. Finally, the paper examines the relationship between lines of credit and SEO underpricing.FindingsIt was found that firms with lines of credit are more likely to time the equity market, perhaps driven by the financing flexibility resulting from the existence of their lines of credit. This finding comes mainly from financially unconstrained firms, as such an effect is not observed among financially constrained firms with lines of credit. It is further shown that firms with lines of credit are more likely to experience less severe equity underpricing, perhaps owing to market timing behavior. The results provide evidence on how lines of credit may create value to a firm through its market timing.Originality/valueThe paper sheds new light on how lines of credit may create value to a firm through the market timing channel.
Reliability and validity of the Children Participation Assessment Scale in Activities Outside of School–Parent version for children with physical disabilities
Authors: Amini Malek , Hassani Mehraban Afsoon , Pashmdarfard Marzieh , Cheraghifard Moslem 
Published: January 2019

AbstractIntroductionOccupational therapy supports individuals to participate in meaningful activities. Participation in activities should be assessed with appropriate tools. The aim of the present study was to establish the reliability and validity of the Children Participation Assessment Scale in Activities Outside of School–Parent version (CPAS‐P) for children with physical disabilities.MethodsThe participants were 304 parents of 6‐ to 12‐year‐old children with physical disabilities. Confirmatory factor analysis (CFA), internal consistency, convergent validity of the CPAS‐P with the Vineland Adaptive Behavior Scale (VABS), and test–retest reliability were measured.ResultsConfirmatory factor analysis showed acceptable values for all indices of fit, namely goodness of fit index (GFI), adjusted GFI, normal fix index, comparative fit index, incremental fit index (i.e., greater than 0.90), and the value of root mean square error of approximation was 0.07, which was acceptable. High Cronbach's alpha coefficients (above 0.9) were reported for the total score of each scale (diversity = 0.94, frequency = 0.94, with whom = 0.92, enjoyment = 0.95, and parent satisfaction = 0.95). The convergent validity of the CPAS‐P with the VABS was moderate to good and the test–retest reliability (ICC) for the total scores ranged from 0.90 to 0.96.ConclusionThe CPAS‐P had good psychometric properties for parents reporting the activities of their 6‐ to 12‐year‐old children with physical disabilities and can be utilized in clinical practice.
Successful intravenous Alteplase for a centenarian woman with acute ischaemic stroke
Authors: He Chaoming , Sun Yanyan , Yan Bo , Chen Haiyun , Zheng Yu , Tang Ying 
Published: January 2019

SummaryWe report a case of a 105‐year‐old woman who was treated with Alteplase for acute ischaemic stroke (AIS). On arrival, this centenarian woman had sudden‐onset aphasia and right‐sided hemiparesis, her baseline National Institutes of Health Stroke Scale (NIHSS) score was 21. An acute noncontrast brain CT scan showed only mild white matter disease. After assessing the patient's risk‐benefit ratio, the patient was administered intravenous Alteplase (0.9 mg/kg) 2.5 hours after symptom onset. Her right hemiparesis and aphasia eased within 24 hours after Alteplase treatment. At discharge, her NIHSS score had decreased to 1, leaving only mild right facial palsy unresolved. Few clinical data are available on centenarian patients with AIS who undergo intravenous thrombolysis. There are no data on what is the best method to use to manage centenarians. Our successful thrombolysis case indicates that biologically young centenarians may profit from thrombolysis, despite the very high age.
Characterization and sources of dissolved and particulate phosphorus in 10 freshwater lakes with different trophic statuses in China by solution 31P nuclear magnetic resonance spectroscopy
Authors: Zhang Chen , Feng Weiying , Chen Haiyan , Zhu Yuanrong , Wu Fengchang , Giesy John P. , He Zhongqi , Wang Hao , Sun Fuhong 
Published: January 2019

AbstractInformation on dissolved phosphorus (DP) and particulate phosphorus (PP) is essential to evaluate the P dynamics and control eutrophication. In this work, DP and PP in 10 freshwater lakes representing various trophic statuses were analyzed by solution 31P nuclear magnetic resonance spectroscopy. The results indicated that the predominant forms of DP and PP were orthophosphate (Ortho‐P) and monoester phosphate (Mono‐P). There was a greater concentration of Ortho‐P and Mono‐P in the water and particulate matter of medium‐eutriphic lakes than in lightly eutriphic or mesotrophic lakes. α‐Glycerophophate (2.7–32.5%), β‐glycerophosphate (1.3–23.4%), guanosine 2′Mono‐P (20.2–29.3%), inositol hexakisphosphate (IHP) (8.3–36.4%) and nicotinamide adenine dinucleotide (NAD) (17.3–35.9%) were identified as the major chemical forms of Mono‐P in water and particulate matter, which originate mainly from the degradation of labile diesters, aquatic/microbial sources and a combination of terrestrial and aquatic/microbial sources. Diester phosphate (Di‐P) was dominated by teichoic acid (0.5–14.8%) and deoxyribonucleic acid (DNA) (0.6–17.7%), which originated from aquatic/microbial sources. Moreover, correlation analysis showed that dissolved Mono‐P in water and particulate matter had a positive correlation with chlorophyll‐a (Chl‐a), which indicated their potential bioavailability for algal activity. pH was a crucial parameter to control Di‐P, pyrophosphate (Pyro‐P) and polyphosphate (Poly‐P) in water. Mono‐P/PPs showed a positive correlation with Chl‐a (R2 = 0.459), total phosphorus (TP) (R2 = 0.586) and the trophic status index (R2 = 0.588), which suggested that particulate Mono‐P can potentially contribute to lake eutrophication. Both Ortho‐P and Mono‐P were major contributors of P nutrients for algae, and therefore source control and new techniques are needed for reducing eutrophication.
Interactive effects of wind and light on growth and architecture of poplar saplings
Authors: Feng Jinxia , Huang Ping , Wan Xianchong 
Published: January 2019

AbstractTo explore the interactive effects of wind and light on growth and morphogenesis, poplar saplings were subjected to two different levels of wind and light. Morphogenesis, growth, water relations and gas exchange were examined in a factorial experiment. The results showed that wind reduced both shoot height and root growth but did not affect shoot diameter or root/shoot ratio, while light promoted both shoot and root growth, and the root/shoot ratio. However, light and wind consistently increased stem taper. Wind and light reduced leaf water potential and increased stem xylem cavitation at midday. Lateral shade decreased root and stem hydraulic conductance, while wind reduced stem hydraulic conductance without influencing root hydraulic conductance. Wind and light reduced the vulnerability of poplar saplings to xylem cavitation. Lateral shade strongly reduced the CO2 assimilation rate and stomatal conductance. Wind reduced the assimilation rate at midday under full sunlight. In summary, both light and wind increased stem taper, although the two environmental factors had opposite effects on the growth of poplar saplings. Lateral shading reduced the growth of shoots and roots of poplar saplings by restricting assimilation, and light promoted greater allocation of carbon to roots than to shoots, and to a lower rather than upper portion of the stem, leading to increased root/shoot ratio and stem taper. At the sapling stage, wind reduced shoot height and root growth primarily by interrupting water balance, and also induced thigmomorphogenic responses, such as increased taper. Finally, lateral shading did not suppress the thigmomorphological responses to wind.
Risk sensitivity of a forager with limited energy reserves in stochastic environments
Authors: Ito Hiromu 
Published: January 2019

AbstractLong‐term environmental stochasticity is known to affect the adaptive evolution of life history traits. In stochastic environments, there are two different levels of behavioral optimization, as follows: Level 1, the optimal strategy under an intrageneration stochastic environment and Level 2, the optimal strategy under an intergeneration stochastic environment. This article presents a simple optimal foraging model under predation risks and verified the effect of behavioral optimization on the foraging time ratio. In this model, foragers are exposed to predation risks during foraging but are safe if they stay in their nests without any food. The foraging time allocation strategies that optimize the geometric mean fitness (Level 2) were compared with the arithmetic mean fitness (Level 1) to verify the effects of intergenerational stochasticity, whereby there is an alternation in good/bad environments across generations. As in previous studies, risk‐averse strategies (a shorter foraging time is adopted for Level 2 than for Level 1) were commonly observed using this model. Unexpectedly, the model showed a tendency toward a preference for risk‐prone strategies. This qualitative difference became prominent when food was abundant and the maximum energy reserves were small. Theoretical studies have shown that risk‐averse strategies are commonly adopted during food shortages and result in starvation. However, the current results indicate that risk‐prone strategies may become optimal under a limited reserve capacity. Thus, the optimal strategy depends not only on the individual status and environmental conditions, but also on the detailed selection regimes.
Ecological aspects of arbuscular mycorrhizal fungal communities in different habitat types of a Brazilian mountainous area
Authors: Vieira Larissa C. , da Silva Danielle K. A. , da Silva Iolanda R. , Gonçalves Camila M. , de Assis Daniele M. A. , Oehl Fritz , da Silva Gladstone A. 
Published: January 2019

AbstractIncreasing elevation affects many abiotic factors, such as a temperature decrease and an increase in radiation, as well as multiple biotic characteristics such as richness and composition of plant communities, both of which contribute to the formation of different habitats in mountainous landscapes. Both biotic and abiotic factors also affect belowground arbuscular mycorrhizal fungi (AMF) communities, but there is scarce information available from tropical mountain ecosystems. The objective of this study was to determine the diversity and distribution of AM fungi in different mountainous habitat types in the Chapada Diamantina mountain range in Bahia (NE Brazil). Soil samples were collected in five habitats types: high‐altitude cerrado savannas (HAC), natural grasslands (GRA), gallery forests (GAF), in natural rocky rupestrian fields (shrublands; CAR) and in rocky, rupestrian field in the regeneration stage (CRR). A total of 49 AMF species were identified, of which Glomeraceae and Acaulosporaceae species were the most representative families. The AMF communities did not follow the shifts in plant communities. The composition of the AMF communities differed only between CAR and HAC and between CRR and GAF, while the other habitats had similar AMF communities. Our conclusion is that the AMF community assemblages in tropical mountains are related to the heterogeneity of habitats of these ecosystems. In our study, silt and coarse sand contents were the main factors related to the community composition of AMF in the different habitats.