bluuebunny/crossref_metadata_2025_split huggingface dataset:
Excitability regulation in the dorsomedial prefrontal cortex during sustained instructed fear responses: a TMS-EEG study
Authors: Gonzalez-Escamilla Gabriel , Chirumamilla Venkata C. , Meyer Benjamin , Bonertz Tamara , von Grothus Sarah , Vogt Johannes , Stroh Albrecht , Tüscher Oliver , Kalisch Raffael , Muthuraman Muthuraman , Groppa Sergiu 
Published: March 2018

AbstractBackgroundThreat detection is essential for protecting individuals from precarious situations. Early studies suggested a network of amygdala, limbic regions and dorsomedial prefrontal cortex (dmPFC) involved in fear processing. Excitability regulation in the dmPFC might be crucial for physiological fear processing, while an abnormal excitability pattern could lead to mental illness. Non-invasive paradigms to measure excitability regulation during fear processing in humans are missing.MethodsWe adapted an experimental approach of excitability characterization using electroencephalography (EEG) recordings and transcranial magnetic stimulation (TMS) over the dmPFC during an instructed fear paradigm to dynamically dissect its role in fear processing. Event-related (ERP) and TMS-evoked potentials (TEP) were analyzed to trace dmPFC excitability in healthy young volunteers (n = 40, age = 27.6 ± 5.7 years, 22 females). Moreover, we linked the excitability regulation patterns to individual structural MRI-derived properties of gray matter microstructural integrity of the fear network.ResultsAn increased cortical excitability was demonstrated in the threat (T) condition in comparison to no-threat (NT) as showed by increased amplitude of evoked potentials. Furthermore, TMS over the dmPFC induced markedly increased evoked responses during T condition in relation to NT. Moreover, we found that the structural integrity of the dmPFC and the amygdala predict excitability regulation patterns as measured by ERP and TEP during fear processing.ConclusionsWe describe the dynamic range of excitability regulation in dmPFC during fear processing. The applied paradigm can be used to non-invasively track response abnormalities to threat stimuli in healthy subjects or patients with mental disorders.
Farmers’ responses to the changes in Hungarian agricultural insurance system
Authors: Zubor-Nemes Anna , Fogarasi József , Molnár András , Kemény Gábor 
Published: March 2018

Purpose
The purpose of this paper is to investigate the role of crop insurance among Hungarian crop farmers and the responses to the introduction of the two-scheme risk management system. Specifically, first, it examines the economic and environmental factors affecting the willingness of farmers to contract crop insurance. Second, it reveals the relationship between having crop insurance and technical efficiency of crop producing farms.

Design/methodology/approach
Probit models of panel data are applied to explore the factors of insurance decisions. The relationship between efficiency and insurance is investigated with two-stage data envelopment analysis (DEA) model with double bootstrap using panel data for the 2001 to 2014 period.

Findings
The results of Probit model estimations show that the education, the size, the indebtedness of crop producing farms and the new two-scheme risk management system are in positive correlation, while the concentration of farming activity are in negative correlation with the crop insurance contracting. The estimations of two-stage DEA model reveal that crop producing farms with an agricultural insurance contract are more efficient than the farmers without using this risk management tool.

Originality/value
Empirical investigation of the influencing factors of agricultural insurance demand in Hungary and the examination of the relationship between insurance and technical efficiency may contribute to the development of Hungarian risk management system.
Gender diversity in the board, women’s leadership and business performance
Authors: Moreno-Gómez Jorge , Lafuente Esteban , Vaillant Yancy 
Published: March 2018

PurposeThis paper aims to investigate how gender diversity in top management – i.e. boardroom and top management positions – affects business performance among Colombian public businesses.Design/methodology/approachBuilding on the upper echelon theory which emphasizes that gender in an important characteristic that influences top management’s decision-making, panel data models are used on a sample of 54 Colombian public businesses for the period 2008-2015 to test the proposed hypotheses relating to gender diversity and subsequent business performance.FindingsThe results support that gender diversity is positively associated with subsequent business performance. More concretely, the relationship between gender diversity at the top of the corporate hierarchy – in the present case, as CEO and in the top management team – and subsequent performance becomes more evident when performance is linked to business operations (ROA), whereas the positive effect of women’s representation in the boardroom and subsequent performance is significant when performance is measured via shareholder-oriented metrics (ROE).Originality/valueFew studies have addressed the role of gender diversity on performance in developing economies. This study contributes to better understand how gender diversity affects performance in contexts where women are underrepresented in the top management, and where the appointment of women directors or managers is not driven by regulatory pressures.
Riba and interest in Islamic finance: semantic and terminological ıssue
Authors: Suharto Ugi 
Published: March 2018

Purpose
The aim of this paper is to argue analytically that interest and riba are not exactly the same and not an interchangeable terminology. There are similarities and differences between the two at the conceptual level.

Design/methodology/approach
To support the argument, the paper shows that it is possible to prove cases where the riba is involved but the interest is not. Hence, there is a situation of the presence of riba without interest. Furthermore, it is also possible to prove cases where the interest is involved but the riba is not. Hence, there is a situation of the presence of interest without riba. The notion and concept of interest in finance are analysed critically in comparison with riba in Islamic jurisprudence (fiqh Islami). So a comparative conceptual analysis is the main methodology of the paper.

Findings
The paper finally suggests that the correct expression should be that Islamic banking and finance is “a ribawi free of banking and finance” instead of “interest free of banking and finance” as it is popularised.

Research limitations/implications
The paper is conceptual in nature. No empirical analysis is pursued.

Practical implications
Islamic finance should not claim it self as interest-free finance, rather riba-free finance.

Social implications
It is more truthful to the society to say that Islamic finance is riba-free finance.

Originality/value
The paper is expected to contribute in the conceptual level of Islamic banking and finance’s understanding by clearing up the basic confusion and misconception about riba and interest. This would consequently minimise or even eliminate the taken-for-granted tendency of denoting the semantic of riba and interest as an interchangeable term, especially when writing in English and addressing the finance’s students and scholars. The semantic clarification between interest and riba hopefully becomes the main contribution of this paper.
Backdating of executive stock options: comparing financial and nonfinancial industries
Authors: Tee Kienpin , Wiley Marilyn 
Published: March 2018

Purpose
The 2008-2009 subprime mortgage crisis in the USA caused bankruptcies and closures of many financial institutions. Yet many CEOs of US financial institutions were awarded huge bonuses and pay packages despite the economic collapse, suggesting that their incomes were not in conjunction with those of the shareholders, indicating a serious agency problem. This issue raises the question as to whether stock option backdating, another example of an agency problem, was as prevalent as slack lending policies among these financial institutions. This paper aims to compare the relative magnitude of executive option backdating in financial and nonfinancial firms.

Design/methodology/approach
Using a sample of CEO stock option grants from 1995 to 2006, obtained from ExecuComp, the authors employ an event study around the grant dates of executive options. The authors compare the abnormal price movements between financial and nonfinancial firms.

Findings
The abnormal negative stock returns were found before the award dates for both groups of firms. The after-event abnormal returns of both groups of firms, however, show different trends. For nonfinancial firms, there is an immediate turnaround of the abnormal return movement right after the grants; that is, the price increases, indicating the occurrence of significant backdating events. For financial firms, however, there is no significant price rebound after the grant date. In fact, the price continued to decline throughout the after-event period.

Research limitations/implications
The result shows that nonfinancial firms demonstrate significantly more option backdating behavior than financial firms.

Practical implications
The findings suggest that previous findings on prevalent backdating among all public listed firms are only partially correct. This paper shows that backdating behavior found in previous studies is indeed driven by nonfinancial firms. This unexpected finding contradicts the initial prediction of authors that option backdating may be more likely among financial firms.

Originality/value
Based on previous research, the authors recognize that generally the official grant dates of firms must have been set retroactively, as shown by Lie (2005). The findings, however, show that financial firms demonstrate only partial backdating behavior. This study opens a path for future research to further discover why financial firms exhibit less backdating behavior compared with nonfinancial firms, and if option backdating is not an issue for financial firms, why the share prices of these firms decline significantly prior to the grant date.
The law is just the law: analysing the definition of corruption in Zimbabwe
Authors: Maguchu Prosper Simbarashe 
Published: March 2018

Purpose
The purpose of this paper is to highlight the shortfalls of the legal definition of corruption in Zimbabwe.

Design/methodology/approach
Defining corruption is a universal challenge. Thus, in reviewing Zimbabwes definition, this paper also draws on other common law system jurisdictions based on English traditions and Sharia law to make a comparative analysis. The paper also takes a multi-disciplinary approach that transcend fields of law and anthropology.

Findings
Although criminal law can be used as the normative basis in the fight against corruption, it can also be used by the powerful to shield themselves from corruption, through its indeterminacy and interpretation. Be this as it may, real and firm law can assist in curbing the vice.

Research limitations/implications
The paper’s purview is limited both in terms of subject and scope. Although it starts by considering the definition of corruption to get a broad overview of this subject, it mainly focuses on the meaning of two popular concepts that are popularly identified with our understanding of corruption – abuse of power and public office.

Originality/value
The paper tries to establish a framework for understanding and curbing corruption through the use of statutory law.
The case for mental health support at a primary care level
Authors: Saeidi Saeideh , Wall Richard 
Published: March 2018

Purpose
Severe mental illness affects a significant number of people and, if left untreated, leads to poor quality of life and disability. Many of the aspirations proposed for new models of care assert that better preventative services, closer integration between professionals, and increased access to cognitive behavioural therapy in primary care will bring substantial benefits and improved outcomes. The purpose of this paper is to explore the benefits of integrating mental health services into primary care, and improving collaboration between secondary services and primary care. There is a transition underway in healthcare whereby a focus on illness is being supplemented with, or refocused towards achieving better patient well-being. New approaches to service provision are being proposed that: focuses on more holistic outcomes; integrates services around the user; and employs innovative system techniques to incentivise professional and organisational collaboration. Such a transition must be inclusive of those with mental health needs managed in primary care and for those people with serious mental illness in secondary care.

Design/methodology/approach
This paper discusses the issues of professional collaboration and the need to provide mental healthcare in a continuous and coordinated manner and; how this may improve timely access to treatment, early diagnosis and intervention. Importantly, it is essential to consider the limitations and reality of recent integration initiatives, and to consider where the true benefit of better integrating mental health into a more collaborative system may lie.

Findings
Identifying and addressing issues of parity is likely to call for a new approach to service provision that: focuses on outcomes; co-designs services integrated around the user; and employs innovative contracting techniques to incentivise provider integration.

Practical implications
There is a transition underway in healthcare whereby a focus on illness is being supplemented with or refocused towards working towards wellness. Such a transition requires primary care mental health services to be provided in a continuous and coordinated manner in order to meet the health needs of people with serious mental illness.

Originality/value
It discusses the issues of professional collaboration and how this may improve timely access to treatment, early diagnosis and intervention. It is essential to consider the limitations and reality of recent integration initiatives, and to consider where the true benefit may lie.
Quality control issues in 3D-printing manufacturing: a review
Authors: Wu Hsin-Chieh , Chen Tin-Chih Toly 
Published: March 2018

Purpose
This study aims to investigate issues of quality and quality control (QC) in three-dimensional (3D) printing by reviewing past work and current practices. Possible future developments are also discussed.

Design/methodology/approach
After a discussion of the major quality dimensions of 3D-printed objects, the applications of some QC techniques at various stages of the product life cycle (including product design, process planning, incoming QC, in-process QC and outgoing QC) are introduced.

Findings
The application of QC techniques to 3D printing is not uncommon. Some techniques (e.g. cause-and-effect analysis) have been applied extensively; others, such as design of experiments, have not been used accurately and completely and therefore cannot optimize quality. Taguchi’s method and control charts can enhance the quality of 3D-printed objects; however, these techniques require repetitive experimentation, which may not fit the work flow of 3D printing.

Originality/value
Because quality issues may discourage customers from buying 3D-printed products, enhancing 3D printing quality is imperative. In addition, 3D printing can be used to manufacture diverse products with a reduced investment in machines, tools, assembly and materials. Production economics issues can be addressed by successfully implementing QC.
Validating 3D-printed porous proxies by tomography and porosimetry
Authors: Hasiuk Franciszek , Ishutov Sergey , Pacyga Artur 
Published: March 2018

Purpose
The purpose of this study is to evaluate how accurately a 3D printer could manufacture basic porous models. Geoscience research is evolving toward numerical prediction of porous rock properties, but laboratory tests are still considered a standard practice. 3D printing digital designs of porous models (proxies) is a way to bridge the gap between these two realms of inquiry.

Design/methodology/approach
Digital designs of simple porous models have been 3D-printed on an inkjet-style (polyjet) 3D printer. Porosity and pore-throat size distribution of proxies have been measured with helium porosimetry, mercury porosimetry and computed tomography (CT) image analysis. Laboratory results on proxies have been compared with properties calculated on digital designs and CT images.

Findings
Bulk volume of proxies was by 0.6-6.7 per cent lower than digital designs. 3D-printed porosity increased from 0.2 to 1.9 per cent compared to digital designs (0-1.3 per cent). 3D-printed pore throats were thinner than designed by 10-31 per cent.

Research limitations/implications
Incomplete removal of support material from pores yielded inaccurate property measurements. The external envelope of proxies has been 3D-printed at higher accuracy than pores.

Practical implications
Characterization of these simple models improves understanding of how more complex rock models can be 3D-printed accurately and how both destructive (mercury porosimetry) and non-destructive (CT and helium porosimetry) methods can be used to characterize porous models.

Originality/value
Validation of 3D-printed porous models using a suite of destructive and non-destructive methods is novel.
Addressing social influences reduces antibiotic duration in complicated abdominal infection: a mixed methods study
Authors: Broom Jennifer , Tee Chin Li , Broom Alex , Kelly Mark D. , Scott Tahira , Grieve David A. 
Published: March 2018

BackgroundAntimicrobial therapy for intra‐abdominal infections is often inappropriately prolonged. An intervention addressing factors influencing the duration of intravenous antibiotic use was undertaken. This study reports the antibiotic prescribing patterns before and after the intervention and a qualitative analysis of the experience of the intervention.Methods
Quantitative: A retrospective audit of patients with complicated intra‐abdominal infection before and after a multifaceted persuasive intervention was performed. Qualitative: Semi‐structured interviews were performed to evaluate which elements of the intervention were perceived to be effective.ResultsAn intervention including collaborative inter‐specialty and inter‐professional educational meetings, and education of all professional streams was undertaken. Quantitative: Twenty‐three patients before and 22 patients after the intervention were included. The total duration of antibiotics decreased significantly following the intervention (9.2 versus 6.6 days P = 0.02). The duration of intravenous antibiotics did not change significantly (5.4 versus 4.5 days, P = 0.06). Qualitative: Eighteen health‐care professionals participated. Thematic analysis indicated that a collaborative approach between senior surgical and infectious disease specialists in the pre‐intervention stage led to perceived ownership and leadership of the intervention by the surgical team, which was thought critical to the success of the intervention. Conversely, the ability of nurses and pharmacists to influence antibiotic practice was considered limited and a poster promoting the intervention was perceived as ineffective.ConclusionConsultant leadership and specialty ownership of the process were perceived to be critical in the success of the intervention. Antibiotic stewardship programs which address social factors may have greater efficacy to optimize antimicrobial prescribing.
Discharges from an early intervention in psychosis service: The effect of patient characteristics on discharge destination
Authors: Ahmed Shiraz , Peters Kate Zara , Chakraborty Nandini 
Published: March 2018

AimThe present study aimed to determine the influence of demographic and clinical features on the likelihood of patients being discharge to primary vs secondary care. The overarching aim of this service evaluation is to assess factors affecting discharge and determine important modulators of discharge destination to inform care planning in services.MethodClinical and demographic data were extracted from patient notes of those discharged from the Psychosis Intervention and Early Recovery (PIER) service in Leicestershire between January 2005 and December 2013. A total of 508 records were analysed and logistic regression was used to assess the impact of diagnostic, demographic and other clinical factors on the discharge destination of patients.ResultsOf the 508 patients, 241 (47.44%) had been discharged to primary care and 267 (52.55%) to secondary psychiatric services. The factors which increased the likelihood of patients being discharged to secondary care were diagnoses of enduring psychoses, being referred from inpatient services and longer time spent with the PIER team.ConclusionsDiagnosis and duration of treatment were significant predictors of discharge destination. Patients with diagnoses of enduring psychotic illness, were more likely to be discharged to a secondary psychiatric service irrespective of gender, ethnicity and geographical location. These data may suggest the possibility to predict the discharge destination when patients are taken on to the caseload of an early intervention in psychosis (EIP) team and have important implications for psychoeducation, preparing the patient for future after EIP and distribution of resources.
Mucocutaneous manifestations of cocaine abuse: a review
Authors: Moreno‐Artero E. , Querol‐Cisneros E. , Rodríguez‐Garijo N. , Tomás‐Velázquez A. , Antoñanzas J. , Secundino F. , Pilar Gil‐Sánchez M. , España A. 
Published: March 2018

AbstractCocaine is an alkaloid extracted from the leaves of the Erythroxylum coca plant that emerged in the 1970s as a fashionable drug among members of certain social backgrounds. Cocaine abuse is a problem of current interest, which is mostly hidden and underdiagnosed, but dramatically widespread among all socio‐economic strata, and with an incidence which is increasing at an alarming rate. There are 1.5 million cocaine consumers in the USA. In Spain, the prevalence of consumption among the population between 15 and 65 years old is higher, reaching 3.1%. Because of this, it seems important to understand and recognize all the mucocutaneous manifestations of cocaine abuse which have been reported in the literature to clarify and to help dermatologists in their daily practice. In this article, we describe the principal mucocutaneous manifestations of cocaine abuse and we review isolated case reports which have been published in the literature. Because the dermatologist may deal with an unknown problem as well as with an already well‐known history of cocaine abuse, it seems logical to separate the mucocutaneous manifestations into those which are frequent and highly suggestive, such as those caused by vascular injury, damage to mucosal membranes, infectious diseases or neutrophilic dermatosis, especially when suffered by young people and in consonance with other systemic manifestations and, those which have been reported in the literature as isolated case reports. We also summarize the main aspects of its pathogeny, principal pharmacodynamic and pharmacokinetic characteristics, and diagnostic tools.