bluuebunny/crossref_metadata_2025_split huggingface dataset:
State-space approach to capital return in nonlinear growth processes
Authors: Kärenlampi Petri P. 
Published: August 2019

PurposeThe purpose of this paper is to introduce a capital return rate function for growth processes, and apply it to financial sustainability considerations in growing multiannual plants.Design/methodology/approachA partition function of change rate of capitalization is introduced, as well as that of capitalization itself, and the expected value of capital return rate is produced as the ratio of the two functions.FindingsFinancial sustainability significantly differs from maximum-yield sustainability, and does not depend on any external interest rate.Research limitations/implicationsIt is proposed that financial considerations should not be based on any arbitrary external interest. Neither should the shape of any yield function be neglected. Constancy of capital return rate in time is not assumed.Practical implicationsTwo forestry examples show that the capital return rate is sensitive to rotation time, and in particular to the level of initial investment. The proposed procedure can be applied in the absence of periodic boundary conditions in time.Originality/valueThe methodology has not been applied in this field previously.
The influence of audit committee’s and company’s characteristic on intellectual capital disclosure
Authors: Naimah Zahroh , Mukti Nico Acintyo 
Published: August 2019

Purpose
The purpose of this paper is to test the influences of audit committee’s and company’s characteristic on intellectual capital disclosure (ICD) among the LQ45-listed companies in Indonesia Stock Exchange (BEI) between 2013 and 2014.

Design/methodology/approach
The paper employed multiple linear regression and saturation sample as the analysis methods.

Findings
The findings showed that size of audit committee does not significantly influence ICD; meeting frequency of audit committee positively influences ICD; and company size does not influence ICD positively. On the other hand, profitability does not significantly influence ICD; leverage has negative and significant influence on ICD; and the type of industry does not significantly influence intellectual capital disclosure.

Originality/value
As there are few ICD studies, this research will surely add ICD antecedents to literature.
A comparative analysis of long-term performance of construction and non-construction IPOs in India
Authors: Kumar Singla Harish 
Published: August 2019

PurposeThe purpose of this paper is to analyze the long-term performance of construction sector initial public offers (IPO) made in India during 2006–2015. The study aims to compare the performance of the construction sector IPOs with the non-construction sector IPOs and finds the determinants of long-term performance of construction sector IPO with a time horizon of three years. The study also attempts to find out, if the long-term IPO underpricing that has been discussed in the literature, really exists or it is a myth.Design/methodology/approachThe study uses data of IPOs listed on National stock exchange during 2006–2015. In total, 281 IPOs are considered for the study, among which 44 are construction sector IPOs. IPOs anniversary performance of three successive years is calculated from the date of listing, and a random effect panel regression model with clustered robust estimates using the maximum likelihood method is performed to find out the determinants of IPO performance. The data are also tested for multicollinearity, stationarity and heteroscedasticity to ensure the robustness of results.FindingsThe results show that in the long-run construction sector IPOs outperform the non-construction sector IPOs, though the performance is below average when compared to market returns. The IPO underpricing is a myth, and IPO underperformance is a reality in India. The performance of construction sector IPOs is driven positively by market return, size of the firm and negatively by liquidity of the firm.Originality/valueThe paper is the first attempt to analyze the performance of construction sector IPOs, and compare it with non-construction sector IPOs. The study uses a random effect panel regression model with robust estimates using the maximum likelihood method to ensure the robustness of results. This is the first time the performance of IPOs is studied with a panel data approach.
Leadership, uncertainty and risk: how leaders influence teachers
Authors: Twyford Kaye , Le Fevre Deidre 
Published: August 2019

PurposeThe purpose of this paper is to examine how the actions of leaders influence teachers’ perceptions of risk and sensemaking during professional learning (PL).Design/methodology/approachA qualitative case study primarily involving semi-structured interviews was utilized to collect teacher-perception data. In total, 21 teachers across three New Zealand schools were interviewed as they participated in the first year of a school-wide PL initiative. Data were analyzed using a risk perception lens focused on uncertainty.FindingsTeachers’ perceptions of risk were influenced by leaders’ actions. Leaders built supportive relationships by knowing the teacher as a learner; showing empathy and respect; providing support; and engendering trust. Teachers reported that the quality of relationships combined with their own state of knowledge influenced their perceptions of risk and learning.Practical implicationsLeaders are reminded that learning is inherently uncertain and uncomfortable and that they have an important role to ensure an environment that is safe and supportive for teacher risk taking and change. A risk lens enables leaders and PL facilitators to consider their influence on teachers’ uncertainty and feelings of vulnerability and take action to reduce these where possible so that both teacher and student learning may be maximized.Originality/valueThis research advances the conceptualization of perceived risk in professional learning, emphasizing the importance of leadership in supporting teacher learning. It adds further detail to our understanding of trust, vulnerability, identity and risk in the development of professional capital and community and their connection to the professional and emotional lives of teachers.
Investors’ risk aversion integration and quantitative easing
Authors: Fassas Athanasios , Papadamou Stephanos , Philippas Dionisis 
Published: August 2019

Purpose
The purpose of this paper is to examine the spillover effects in international financial markets related to investors’ risk aversion as proxied by the variance premium, and how these relationships were affected by the quantitative easing (QE) announcements by the Federal Reserve.

Design/methodology/approach
The empirical analysis employs a multivariate exponential generalized autoregressive conditionally heteroskedastic (VAR-EGARCH) specification, which includes the USA, the UK, Germany, France and Switzerland.

Findings
Two main findings are raised from the empirical analysis. First, the VAR-EGARCH model identifies statistically significant spillover effects identifying the USA as the leading source driving investors’ risk aversion. Second, unconventional monetary easing announcement by the Fed has had significant effects on investors’ risk perspectives.

Practical implications
Accounting for the dynamic volatility of variance premium inter-dependencies, the authors show that the correlations among variance premia increase during the QE announcements by the Federal Reserve, suggesting a herding behavior that may potentially lead to stock price bubbles and undermine financial stability.

Originality/value
This is an empirical attempt that investigates the unexplored effects of unconventional monetary policy decisions in relation with investors’ attitudes toward risk.
Do overconfident CEOs stay out of trouble? Evidence from employee litigations
Authors: Rayfield Blake , Unsal Omer 
Published: August 2019

PurposeThe authors study the relationship between CEO overconfidence and litigation risk by examining employee-level lawsuit data. The purpose of this paper is to better understand the executive characteristics that potentially affect the likelihood of employee litigations.Design/methodology/approachThe authors employ a unique data set of employee lawsuits from the National Labor Relations Board – “Disposition of Unfair Labor Practice Charges” – which includes complaints, litigations and decisions. The data spans the years 2000–2014. The authors employ the option-based CEO overconfidence metric of Malmendieret al.(2011) as the primary explanatory variable.FindingsThe authors find that overconfident CEOs are less likely to be subjected to labor-related litigations. The authors document that firms with overconfident CEOs have fewer lawsuits opened by both labor unions and individuals. The authors then investigate the effect of employee litigations on firm performance to understand why overconfident CEOs are less prominent among lawsuits. The authors show that litigations lower corporate investment and value of capital expenditures for responsible firms, which may limit overconfident CEOs’ ability to invest. Therefore, the results may reveal the fact that overconfident CEOs may prefer to align with the interest of their employees to avoid reduced investment opportunities.Originality/valueThe paper makes three main contributions. First, it provides the first large-sample evidence on CEO overconfidence and labor relations. The authors employ data on firm-level labor litigation that contains both the case reason and case outcome. Second, this paper adds to the growing literature of CEO overconfidence and governance practices in the workplace. Finally, the study highlights the importance of employee treatment and explores the impact of labor lawsuits on firm value.
Germline mutation in DNA‐repair genes is associated with poor survival in BRCA1/2‐negative breast cancer patients
Authors: Fan Zhenhua , Hu Li , Ouyang Tao , Li Jinfeng , Wang Tianfeng , Fan Zhaoqing , Fan Tie , Lin Benyao , Xu Ye , Xie Yuntao 
Published: August 2019

AbstractBRCA1/2 genes are the most frequently germline mutated DNA‐repair genes, and the survival of BRCA1/2 carriers has been extensively explored in breast cancer. However, the prevalence of germline mutations in non‐BRCA1/2 DNA‐repair genes and the survival of carriers are largely unknown in a large cohort of unselected breast cancer patients. Germline mutations in 16 DNA‐repair genes were determined using a multigene panel in 7657 BRCA1/2‐negative breast cancer patients who were unselected for family history of cancer or age at diagnosis. Among the 7657 BRCA1/2‐negative breast cancer patients, 257 (3.4%) carried at least 1 pathogenic germline mutation in the 16 DNA‐repair genes. The prevalence of DNA‐repair gene mutations was significantly higher in familial breast cancers (5.2%, P = 0.002) and early‐onset breast cancers (diagnosed at and before the age of 40) (4.5%, P = 0.003) than that of sporadic breast cancers (2.9%) (diagnosed above age of 40), respectively. The DNA‐repair gene mutation carriers were significantly more likely to have a larger tumor (P = 0.04) and axillary lymph node metastasis (P = 0.03). Moreover, DNA‐repair gene mutation was an independent unfavorable factor for recurrence‐free survival (adjusted hazard ratio [HR] = 1.38, 95% CI: 1.00‐1.91, P = 0.05) and disease‐specific survival (adjusted HR=1.63, 95% CI: 1.04‐2.57, P = 0.03) in this cohort. Overall, 3.4% of BRCA1/2‐negative breast cancer patients carried germline mutations in the 16 DNA‐repair genes, and the DNA‐repair gene mutation carriers exhibited an aggressive phenotype and had poor survival compared with noncarriers.
Prognostic and predictive role of DNA mismatch repair status in stage II‐III colorectal cancer: A systematic review and meta‐analysis
Authors: Deng Zhujun , Qin Yun , Wang Jing , Wang Gang , Lang Xiaoqiang , Jiang Juan , Xie Kang , Zhang Wengeng , Xu Heng , Shu Yang , Zhang Yan 
Published: August 2019

AbstractDNA mismatch repair (MMR) status was considered to be a potential prognostic factor for colorectal cancer (CRC) but with conflicting reports, and varied in terms of TNM stages. Its relationship with prognosis in stage II‐III CRC had not yet been systematically established. Therefore, we retrieved eligible studies published through May 2019, and screened out 51 studies that reported survival data (overall survival [OS] and/or disease‐free survival [DFS]) in 28 331 CRC patients at stage II‐III, totally 16.4% of whom were characterized as deficient MMR (dMMR). Significant associations of dMMR status were observed with longer OS (Hazard Ratio [HR] = 0.74, 95% CI: 0.68‐0.82; P < .001), as well as DFS (HR = 0.67, 95% CI: 0.59‐0.75, P < .001). However, dMMR patients received no statistically significant benefit from fluoropyrimidine‐based treatment for either OS (HR = 0.84, 95%CI: 0.60‐1.17; P = .31) or DFS (HR = 0.83, 95%CI: 0.60‐1.15; P = .27), compared with that in proficient MMR (pMMR) patients for both OS (HR = 0.55, 95% CI: 0.43‐0.71; P < .001) and DFS (HR = 0.60, 95% CI: 0.50‐0.73; P < .001). Our analysis indicate that dMMR CRC patients at stage II‐III had higher OS and DFS than pMMR ones, and fluoropyrimidine‐based chemotherapy could improve survival in pMMR patients rather than dMMR ones.
Familial pancreatic adenocarcinoma: A retrospective analysis of germline genetic testing in a French multicentre cohort
Authors: Schwartz Mathias , Korenbaum Clement , Benfoda Meriem , Mary Mickael , Colas Chrystelle , Coulet Florence , Parrin Melissa , Jonveaux Philippe , Ingster Olivier , Granier Sandra , De Mestier Louis , Cros Jerome , Riffault Angelique , Muller Marie , Levy Philippe , Rebours Vinciane , Greenhalf William , Soufir Nadem , Hammel Pascal 
Published: August 2019

AbstractThe rate of genetic diagnosis of French patients with familial pancreatic ductal adenocarcinoma (PDAC) is not known. We report germline genetic testing data from 133 index cases meeting criteria for familial pancreatic cancer (FPC) as well as 87 ‘FPC‐like’ index cases who did not fulfilled strict FPC definition but were evocative for a PDAC predisposition. The overall rate of genetic diagnosis (in BRCA1, BRCA2, CDKN2A, and ATM genes) was 8.3% in FPC patients and 4.6% in FPC‐like patients, consistent with the literature in other populations. Genetic variants were also identified in FANCA and BAP1 genes, as well as in the CDKN2A p12 transcript. This pancreas‐specific transcript is a known key player in driving pancreatic oncogenesis. This might be the first described case of a PDAC genetic predisposition due to a variant in this specific transcript.
Activation of epiplexus macrophages in hydrocephalus caused by subarachnoid hemorrhage and thrombin
Authors: Wan Yingfeng , Hua Ya , Garton Hugh J. L. , Novakovic Nemanja , Keep Richard F. , Xi Guohua 
Published: August 2019

AbstractAimsWe have found that hydrocephalus development in spontaneously hypertensive rats was associated with activation of epiplexus cells. The current study examined whether epiplexus cell activation occurs in a rat subarachnoid hemorrhage (SAH), whether activation would be greater in a subset of rats that developed hydrocephalus and the potential role of thrombin in epiplexus cell activation.MethodsThere were two parts in this study. First, an endovascular perforation was performed in rats to induce SAH. Second, rats received an intraventricular infusion of either thrombin or saline. Magnetic resonance imaging was used to measure the ventricular volumes. Immunofluorescence and immunohistochemistry were used to study epiplexus cell activation.ResultsIba‐1, OX‐6, and CD68 were expressed in the epiplexus cells of the choroid plexus in sham‐operated rats. SAH increased Iba‐1 and CD68 immunoreactivity in epiplexus cells in addition to an increase in Iba‐1‐positive cell soma size. Those effects were greater in rats that developed hydrocephalus. Intraventricular thrombin mimicked the effects of SAH on epiplexus cell activation and hydrocephalus.ConclusionThis study supports the concept that epiplexus cell activation is associated with hydrocephalus development. Epiplexus cell activation may be in response to thrombin production after hemorrhage, and it may be a therapeutic target.
The association between aortic knob width on chest x‐ray and obstructive sleep apnoea syndrome in patients referred for sleep testing
Authors: Cetin Erdem , Casim Hasan 
Published: August 2019

AbstractObjectiveObstructive sleep apnoea (OSA) has been linked with many forms of cardiovascular diseases. Aortic knob width (AKW) has increasingly been presented as a marker of diagnosis and prognosis of atherosclerotic coronary artery disease. We sought to determine whether AKW has an association with sleep apnoea syndrome in patients referred to sleep testing in order to provide baseline information for future studies on general population.MethodsA total of 363 patients were included in this retrospective study. The capacity of AKW indexed by patients’ height in predicting the presence of severe OSA was analysed using receiver operating characteristics curve analysis. The association of OSA severity with AKW indexed by height was tested with two separate models of ANCOVA (analysis of variance).ResultsArea under the curve for estimating severe OSA with AKW was 0.67 (95% CI, 0.60 to 0.73, P < 0.001). A cut‐off value of 21.42 mm/m provided a sensitivity of 62.6% and a specificity of 70.7% for severe OSA. In both ANCOVA models, the association of OSA severity on AKW indexed by height was significant and the effect size was moderate (P < 0.001, partial eta squared: 0.09 and 0.05).ConclusionsAortic knob width indexed by height has a significant association with the severity of OSA; however, the association is significantly influenced by gender and age.
Managing cognitive load with a flipped language class: An ethnographic study of the student experience
Authors: Tonkin Kati , Page Sara , Forsey Martin 
Published: August 2019

AbstractThis ethnographic study of a beginning‐level German course at an Australian university examined the student experience of learning second language (L2) grammar in a flipped classroom. Students accessed explicit grammar instruction and completed grammar exercises prior to attending face‐to‐face classes; during class, the structures were briefly reviewed by the students and then applied in interactive task‐based activities focused on meaningful use of the L2. In surveys and interviews, learners reported that the opportunity to manage the pace and depth of their interaction with online grammar modules facilitated their learning and increased their confidence. Linking these outcomes to research that has shown that flipped teaching models reduce or assist in the management of cognitive load, the study presents a compelling case for flipping the L2 classroom.
Monte Carlo Simulations as a Decision Support to Interpret δ15N Values of Nitrate in Groundwater
Authors: Wild Lisa M. , Rein Arno , Einsiedl Florian 
Published: August 2019

AbstractIntense farming is often associated with the excessive use of manure or fertilizers and the subsequent deterioration of the groundwater quality in many aquifers worldwide. Stable isotopes of dissolved nitrate (δ15N and δ18O) are widely used to determine sources of nitrate contamination and denitrification processes in groundwater but are often difficult to interpret. Thus, Monte Carlo simulations were carried out for a site in lower Bavaria, Germany, in order to explain δ15N observations in a porous groundwater system with two aquifers, the main aquifer (MA) and several smaller perched aquifers (PA). For evaluating potential contributions, frequency distributions of δ15N were simulated deriving from (I) the mixing of different nitrate sources, related to land use, as input to groundwater, combined with (II) transport of nitrate in groundwater and (III) microbial denitrification. Simulation results indicate a source‐driven isotopic shift to heavier δ15N values of nitrate in groundwater, which may be explained by land use changes toward a more intensified agriculture releasing high amounts of manure. Microbial denitrification may play a role in the PA, with simulated δ15N distributions close to the observations. Denitrification processes are however unlikely for the MA, as reasonable simulation curve fits for such a scenario were obtained predominantly for unrealistic portions of nitrate sources and related land use. The applied approach can be used to qualitatively and quantitatively evaluate the influence of different potential contributions, which might mask each other due to overlapping δ15N ranges, and it can support the estimation of nitrate input related to land use.
The gadolinium effect on crystallization behavior and luminescence of β‐NaYF4:Yb,Er phase
Authors: Vukovic Marina , Mancic Lidija , Dinic Ivana , Vulic Predrag , Nikolic Marko , Tan Zhenquan , Milosevic Olivera 
Published: August 2019

AbstractSingle phase β‐NaY0.8‐xGdxYb0.18Er0.02F4 nanoparticles with different concentrations of gadolinium ions were prepared via PVP‐assisted solvothermal treating at 200°C (PVP‐ polyvinylpyrrolidone). With the increase in Gd3+ concentration, size of the nanoparticles decreased. The up‐converting spectra recorded upon 980 nm irradiation showed the green (510‐560 nm) and red (640‐690 nm) emissions, due to 2H11/2, 4S3/2 → 4I15/2 and 4F9/2 → 4I15/2 transitions, respectively. The strongest up‐conversion luminescence was detected in 15 mol% Gd3+‐doped nanoparticles obtained after 20 hours of solvothermal treating. With the rise of Gd3+ content up‐conversion emission decreased due to increased defect concentration in the NaYF4 matrix. Fourier transform infrared spectroscopy proved in situ generation of hydrophilic nanoparticles as a result of PVP ligands retention at the particle surface.
Selective preparation of Ag species on photoluminescence of Sm3+ in borosilicate glass via Ag+‐Na+ ion exchange
Authors: Zhao Jingyuan , Zhu Jialun , Yang Zhengwen , Jiao Qing , Yu Chengye , Qiu Jianbei , Song Zhiguo 
Published: August 2019

AbstractPhotoluminescence (PL) of rare earth ion‐doped glasses could be enhanced by diverse Ag species such as Ag+ ions, Ag+‐Ag+ pairs, Ag nano‐clusters (NCs), and Ag nanoparticles (NPs). Selective preparation of silver species in rare earth ion‐doped glasses is a crucial step to obtain the luminescence enhancement of rare earth ions caused by the different silver species. In this work, Ag+ ions and Ag NCs were selectively prepared in the Sm3+‐doped borosilicate glass via the Ag+‐Na+ ion exchange. The influence of AgNO3/NaNO3 ratio in the molten salt on the Ag existing states was investigated. The results demonstrate that the isolated Ag+ ions exist in the Sm3+‐doped borosilicate glass when the ratio of AgNO3/NaNO3 is 1/1000. The Ag NCs are formed in the Sm3+‐doped borosilicate glass when the AgNO3/NaNO3 ratio is 1/10. The influence of Ag+ ions or Ag NCs on the PL of Sm3+ was systematically investigated. The results show that the PL of Sm3+ was enhanced by the energy transfer from Ag+ ions or Ag NCs to Sm3+.
The ‘Dream Scene’: Exploring Participatory Socially Engaged Art Practices through Arts‐Based Educational Research
Authors: LeBlanc Natalie 
Published: August 2019

AbstractIn this article, I explore ‘the dream scene’, a mode of installation art described by art critic and art historian Claire Bishop to demonstrate how artistic practice can provoke participation and social engagement. I will focus on a concept entitled ‘the crypt’ that emerged in my doctoral research, and one that I continued to explore in a novel way in a collaborative event at Tate Exchange, in Liverpool, UK in March 2018. It is my intention that ‘the crypt’ can provide an example of what ‘a dream scene’ can look like and, more importantly, what a dream scene can do. Finally, I will attend to some of the implications that this type of engagement has for arts‐based educational research.