bluuebunny/crossref_metadata_2025_split huggingface dataset:
Digitalization and migration: the role of social media and migrant networks in migration decisions. An exploratory study in Nigeria
Authors: Obi Chinedu , Bartolini Fabio , D’Haese Marijke 
Published: November 2020

Purpose
This paper aims to explore the connectivity between social media use, access to migrant networks, information asymmetry and migration intentions.

Design/methodology/approach
The study was conducted using data from individuals living in Nigeria and analysed with a generalized structural equation model, which is rare for this kind of research.

Findings
The authors find a dual mediating role of the social media and the migrant networks in facilitating migration, i.e. reducing the threshold cost required to migrate and introducing a bias in terms of information asymmetry. While social media and access to migrant networks directly increase migration intentions, this changes when incomplete information is provided. People who use social media and their migrant networks for information are more likely to have information about destination countries than information on the transit risk.

Social implications
The study adds valuable insights for designing awareness campaigns aimed at reducing irregular migration.

Originality/value
This study contributes to the understanding of the intersection of migration and digitalization
Doctoral dissertations in supply chain management: a review of Chinese contributions from 1995 to 2019
Authors: Yang Lu , Huo Baofeng 
Published: November 2020

PurposeThis study aims to investigate Chinese doctoral dissertations in supply chain management (SCM) by providing an overview of the evolution of this topic over the past 25 years.Design/methodology/approachThis study reviews 1,945 doctoral dissertations in SCM from 39 Project 985 universities in China.FindingsThe annual number of SCM doctoral dissertations in China varied significantly over time, and the top producers are all strong players in the SCM field with long histories of research. The dissertations use multiple methods, of which mathematical, econometric modeling and simulation, and survey are the most frequently used. Most of the frequently used theories are borrowed from other disciplines. Traditional research topics are frequently investigated in Chinese doctoral dissertations in SCM, but the popular research topics differ by period.Originality/valueThis study has examined Chinese doctoral dissertations in SCM through a literature review. This study provides implications for research topics, methodological approaches, and theoretical lenses for future research. It also disseminates Chinese SCM knowledge to the global academic network to stimulate more SCM research.
Setting margins for margin buying in China: balancing the trade-off between liquidity and prudence
Authors: Hong Hui , Lee Chien-Chiang , Bian Zhicun 
Published: November 2020

PurposeThe purpose of this paper is to propose a new dynamic margin setting method for margin buying in China and evaluate the validity of its performance with the current margin system adopted by stock exchanges in extreme episodes.Design/methodology/approachThis paper adopts the dynamic conceptual model of Huang et al. (2012) (which is based on Figlewski (1984)) but incorporates Markov chain to describe the data generation process of stock price changes. By applying the model to margin buying contracts for the period of March 16, 2018, to May 2, 2018 (baseline study) and June 15, 2015, to July 27, 2015 (robustness test), the model’s superiority to the current margin system adopted by stock exchanges is also tested.FindingsThe paper has several important findings. First, the margins derived by this system vary with market conditions, rising (declining) when stock prices go down (up), and are generally lower than the requirements imposed by stock exchanges. Second, this margin system induces lower overall percentage of costs than that adopted by stock exchanges. Third, parameter estimation plays an important role on shaping empirical results.Research limitations/implicationsThe primary limitation of this paper lies in the fact that it does not solve the issue of determining optimal parameters of the Markov chain model. On the implication of findings, policy-makers and regulators on supervising margin buying activities may need a tune-up on the current margin system which features static margin requirements. Dynamic margins that incorporate market factors are virtually useful to balance the trade-off between liquidity and prudence.Originality/valueTo the best of the authors’ knowledge, this study is the first of its kind to develop a dynamic margin setting method for margin buying in China, aiming to balance the trade-off between liquidity and prudence. It not only takes into account the uniqueness of Chinese markets but also allows for time variations in both initial and maintenance margins.
Improving programming skills: the use of learning style theory and the instant response supplement tool
Authors: Lai Chin-Feng , Jeng Yu-Lin , Huang Sheng-Bo 
Published: November 2020

PurposeIn a programming course, students often need tutors' assistance to complete learning activities, as they lack enough background knowledge to complete tasks. A further problem is that without individual tutoring, the knowledge gap between students increases. Therefore, the authors have proposed an instant response learning supplement tool (IRLST) to support students' learning, in order to facilitate students' independent problem-solving skills.Design/methodology/approachThe authors divided the students into two groups according to their learning styles: verbal and visual. The IRLST was used to collect and analyze the information on their usage and provide supplementary resources to facilitate their learning. The proposed system also analyzed the student usage, background knowledge and exam scores to assess their academic performance.FindingsAccording to the results of statistical analysis, students' learning performance improved significantly, especially low-scoring students. Moreover, as compiler messages were not recognized, students tended to identify the same problems. Thus, it is suggested that teachers not only should focus on improving the students' syntax but also strengthening their background knowledge and debugging skills.Research limitations/implicationsThere are two main limitations in this study: (1) as most of the students were in the visual learning group, the size of the groups was impacted, thus it was not possible to establish a control group; (2) one specific version of the IRLST system did not send reliable advice or supplementary content occasionally.Originality/valueThe IRLST developed in this study can be used to provide immediate supplementary resources to help students overcoming programming problems and developing problem-solving skills.
Visual contagion in prey defence signals can enhance honest defence
Authors: Dong Shihao , Tan Ken , Nieh James C. 
Published: November 2020

Abstract

The co‐evolutionary arms race between predators and their prey has led to complex signalling, especially in groups that benefit from the social transmission of alarm signals. In particular, pursuit deterrence signals can allow individuals and groups to indicate, at relatively low cost, that a predator's further approach is futile.

Pursuit deterrence signals are usually more effective if amplified, for example, by becoming contagious and rapidly spreading among prey without requiring individual prey to confirm predator presence. However, this can also lead to runaway false signalling.

We provide the first evidence of a contagious pursuit deterrence signal in social insects. The Asian honey bee Apis cerana, performs an I See You (ISY) signal that deters attacking hornets.

We show that these signals enhance defensive signalling by also attracting guard bees and that the visual movements of appropriate stimuli alone (hornets and ISY signalling bees, but not harmless butterflies) provide sufficient stimuli. Olfaction and other potential cues are not necessary. The ISY signal is visually contagious and is buffered from runaway false signals because it is specifically triggered and by likely selection for honesty within the highly cooperative bee colony.

These results expand our understanding of contagious signals and how they can be honestly maintained in highly cooperative collectives.
Maximizing the acquisition of unique reads in noninvasive capture sequencing experiments
Authors: Fontsere Claudia , Alvarez‐Estape Marina , Lester Jack , Arandjelovic Mimi , Kuhlwilm Martin , Dieguez Paula , Agbor Anthony , Angedakin Samuel , Ayuk Ayimisin Emmanuel , Bessone Mattia , Brazzola Gregory , Deschner Tobias , Eno‐Nku Manasseh , Granjon Anne‐Céline , Head Josephine , Kadam Parag , Kalan Ammie K. , Kambi Mohamed , Langergraber Kevin , Lapuente Juan , Maretti Giovanna , Jayne Ormsby Lucy , Piel Alex , Robbins Martha M. , Stewart Fiona , Vergnes Virginie , Wittig Roman M. , Kühl Hjalmar S. , Marques‐Bonet Tomas , Hughes David A. , Lizano Esther 
Published: November 2020

AbstractNoninvasive samples as a source of DNA are gaining interest in genomic studies of endangered species. However, their complex nature and low endogenous DNA content hamper the recovery of good quality data. Target capture has become a productive method to enrich the endogenous fraction of noninvasive samples, such as faeces, but its sensitivity has not yet been extensively studied. Coping with faecal samples with an endogenous DNA content below 1% is a common problem when prior selection of samples from a large collection is not possible. However, samples classified as unfavourable for target capture sequencing might be the only representatives of unique specific geographical locations, or to answer the question of interest. To explore how library complexity may be increased without repeating DNA extractions and generating new libraries, in this study we captured the exome of 60 chimpanzees (Pan troglodytes) using faecal samples with very low proportions of endogenous content (<1%). Our results indicate that by performing additional hybridizations of the same libraries, the molecular complexity can be maintained to achieve higher coverage. Also, whenever possible, the starting DNA material for capture should be increased. Finally, we specifically calculated the sequencing effort needed to avoid exhausting the library complexity of enriched faecal samples with low endogenous DNA content. This study provides guidelines, schemes and tools for laboratories facing the challenges of working with noninvasive samples containing extremely low amounts of endogenous DNA.
Long‐term outcomes of sentinel node identification using indocyanine green in patients with lung cancer
Authors: Kawakami Yukikiyo , Kondo Kazuya , Kawakita Naoya , Matsuoka Hisashi , Toba Hiroaki , Takizawa Hiromitsu , Yoshida Mitsuteru , Tangoku Akira 
Published: November 2020

BackgroundSentinel node (SN) biopsy is used in the management of numerous cancers to avoid unnecessary lymphadenectomy. This was a clinical exploration/feasibility study of a novel identification technique for SN biopsy using indocyanine green (ICG) fluorescence imaging during lung cancer surgery.MethodsSN biopsy using ICG was performed on 22 patients who had cT1 or T2N0M0 lung cancer. ICG was injected just around the primary tumor. The fluorescence imaging system enabled visualization of the lymphatic vessels draining from the primary tumor toward the lymph nodes. Fluorescently labeled nodes were dissected, and patients were followed‐up for prognosis and recurrence to confirm the pattern of lymph node metastasis after surgery.ResultsSNs were successfully identified in 16 (72.7%) of 22 patients. A total of 13 of 16 patients had pathological N0 and three had SN metastasis. The median follow‐up time was 92.7 months. Only one patient had no SN metastasis at the postoperative pathological examination and lymph node metastasis during the follow‐up period. The accuracy rate was 93.8% (15/16) and the false‐negative rate was 7.7% (1/13).ConclusionsSNs were identified by ICG fluorescence imaging, and this technique during lung cancer surgery had good identification and accuracy rates throughout the follow‐up period.Key pointsSignificant findings of the studyWe attempted to identify sentinel lymph nodes by indocyanine green in lung cancer surgery. The identification rate was 72.7%. The accuracy rate was 100% immediately after surgery, and 93.8% after follow‐up.What this study addsSentinel node biopsy by indocyanine green may be useful for lymph node dissection during lung cancer surgery to avoid unnecessary lymphadenectomy.
Fetal Alcohol Exposure Alters BOLD Activation Patterns in Brain Regions Mediating the Interpretation of Facial Affect
Authors: Lindinger Nadine M. , Jacobson Joseph L. , Warton Christopher M.R. , Malcolm‐Smith Susan , Molteno Christopher D. , Dodge Neil C. , Robertson Frances , Meintjes Ernesta M. , Jacobson Sandra W. 
Published: November 2020

BackgroundAlthough deficits in the interpretation of affective facial expressions have been described clinically and in behavioral studies of fetal alcohol spectrum disorders (FASD), effects of prenatal alcohol exposure on the neural networks that mediate affective appraisal have not previously been examined.MethodsWe administered a nonverbal event‐related fMRI affective appraisal paradigm to 64 children (mean age = 12.5 years; 18 with fetal alcohol syndrome (FAS) or partial FAS (PFAS), 18 nonsyndromal heavily exposed (HE), and 28 controls). Happy, sad, angry, fearful, and neutral faces and pixelated control images were presented sequentially in a randomized order. The child indicated whether the currently displayed face showed the same or different affect as the previous one.ResultsData from whole‐brain analyses showed that all groups activated the appropriate face processing neural networks. Region of interest analyses indicated that, compared to HE and control children, the FAS/PFAS group exhibited greater blood oxygenation level–dependent (BOLD) signal changes when processing neutral faces than pixelated images in 2 regions that form part of the visual sensory social brain network, which plays an important role in the initial processing of facial affect. By contrast, BOLD signal when processing angry faces was weaker for the FAS/PFAS group in a region involved in the processing of facial identity and facial expressions and in a region involved in the recognition and selection of behavioral responses to aggressive behavior.ConclusionsThese findings of greater BOLD signal in the FAS/PFAS group in response to neutral faces suggest less efficient neural processing of more difficult to interpret emotions, and the weaker BOLD response to angry faces suggests altered processing of angry stimuli. Although behavioral performance did not differ in this relatively simple affective appraisal task, these data suggest that in children with FAS and PFAS, the appraisal of neutral affect and anger is likely to be more effortful in more challenging and dynamic social contexts.
Craving mediates the association between momentary pain and illicit opioid use during treatment for opioid‐use disorder: an ecological momentary assessment study
Authors: Mun Chung Jung , Finan Patrick H. , Epstein David H. , Kowalczyk William J. , Agage Daniel , Letzen Janelle E. , Phillips Karran A. , Preston Kenzie L. 
Published: November 2020

AbstractAimTo assess the role of momentary pain on opioid craving and illicit opioid use among individuals receiving opioid agonist treatment.DesignObservational study using ecological momentary assessment.SettingThe National Institute of Drug Abuse Intramural Research Program in the United States.ParticipantsFifty‐six adults who qualified for opioid agonist treatment.MeasurementsParticipants completed randomly prompted assessments of pain severity, stress, negative mood, opioid craving and illicit opioid use for a mean of 66 days [standard deviation (SD) = 27]. Urine samples were collected two to three times/week throughout.FindingsAlmost 70% of participants reported moderate average pain severity in the past 24 hours at intake and 35% of participants reported chronic pain. There were no significant differences in percent of opioid‐positive urine samples (P = 0.73) and average level of opioid craving during the study period (P = 0.91) among opioid agonist treatment only patients versus opioid agonist treatment patients with chronic pain. However, momentary pain severity significantly predicted concurrent opioid craving [B = 0.02, 95% confidence interval (CI) = 0.01, 0.04], over and above stress and negative mood. Momentary opioid craving, in turn, significantly predicted illicit opioid use that was assessed in the next moment [odds ratio (OR) = 1.72, 95% CI = 1.12, 2.64), while controlling for autocorrelation and the effects of pain, negative mood and stress. Momentary opioid craving significantly mediated the prospective association between momentary pain and illicit opioid use (95% CI = 0.003, 0.032). Exploratory analysis revealed that momentary pain severity also significantly moderated the momentary association between stress and opioid craving (B = 0.02, 95% CI = 0.00, 0.04), such that when momentary pain severity increased, the association between the two intensified.ConclusionsAmong people receiving opioid agonist treatment, momentary pain appears to be indirectly associated with illicit opioid use via momentary opioid craving.
The rewarding recovery study: a randomized controlled trial of incentives for alcohol and drug abstinence with a rural American Indian community
Authors: McDonell Michael G. , Skalisky Jordan , Burduli Ekaterina , Foote Albert , Granbois Alexandria , Smoker Kenneth , Hirchak Katherine , Herron Jalene , Ries Richard K. , Echo‐Hawk Abigail , Barbosa‐Leiker Celestina , Buchwald Dedra , Roll John , McPherson Sterling M. 
Published: November 2020

AbstractAimsTo test if contingency management (CM) interventions for alcohol and drug abstinence were associated with increased alcohol and drug abstinence among American Indian adults with alcohol dependence who also use drugs.DesignIn this 2 × 2 factorial randomized controlled trial, American Indian adults with alcohol dependence who also used drugs were randomized to four conditions: (1) incentives for submission of urine samples only (control condition), (2) CM incentives for alcohol abstinence, (3) CM incentives for drug abstinence or (4) CM incentives for abstinence from both alcohol and drugs.SettingA Northern Plains Reservation in the United States.ParticipantsA total of 114 American Indian adults aged 35.8 years (standard deviation = 10.4); 49.1% were male.Intervention and comparatorParticipants received incentives if they demonstrated abstinence from alcohol (CM for alcohol, n = 30), abstinence from their most frequently used drug (CM for drugs, n = 27) or abstinence from both alcohol and their most frequently used drug (CM for alcohol and drugs, n = 32) as assessed by urine tests. Controls (n = 25) received incentives for submitting urine samples only.MeasurementsPrimary outcomes were urine ethyl glucuronide (alcohol) and drug tests conducted three times per week during the 12‐week intervention period. Data analyses included listwise deletion and multiple imputation to account for missing data.FindingsThe three CM groups were significantly (P < 0.05) more likely to submit alcohol‐abstinent urine samples compared with the control condition, with odds ratios ranging from 2.4 to 4.8. The CM for drugs (OR = 3.2) and CM for alcohol and drugs (OR = 2.5) were significantly more likely to submit urine samples that indicated drug abstinence, relative to the control condition (P < 0.05). However, these differences were not significant in multiple imputation analyses (P > 0.05).ConclusionsContingency management (CM) incentives for abstinence were associated with increased alcohol abstinence in American Indian adults diagnosed with alcohol dependence who also used drugs, living on a rural reservation. The effect of CM incentives on drug abstinence was inconclusive.
Seasonal morphology and immunoreactivity of cytokeratin and atrial natriuretic peptide in dromedary camel poll glands
Authors: Ibrahim Zarroug Hassan , Al‐Kheraije Khalid Ali 
Published: November 2020

AbstractPoll glands are characteristic feature of dromedary camels; although they yield a yellowish offensive secretion, especially during rutting (breeding) season, their function is not yet exactly specified. The present study shows the seasonal morphology and immunoreactivity of cytokeratin (CK) and atrial natriuretic peptide (ANP) in the camel poll gland; the result could clearly specify the role of the gland in camel reproduction. Poll glands are compound tubulo‐alveolar in structure. During rutting season, the secretory units showed wide lumina and simple squamous epithelium surrounded by myoepithelial cells; the lumina became narrower and the epithelium changed to simple cuboidal during non‐rutting season. Many glandular lobules showed abundant interlobular connective tissue with fewer and smaller secretory units during non‐rutting season compared to rutting season. Positive CK and ANP immunoreactivity was detected in the cytoplasm of epithelial cells of secretory units and ducts together with the myoepithelial cells and blood vessels. Although CK immunoreactivity was more intense during rutting season in comparison to non‐rutting season, there was no seasonal variation in ANP immunoreactivity. During both seasons, while the glandular capsule, connective tissue septa, interstitium showed negative CK immunoreactions, they reacted moderately to ANP. In conclusion, the poll gland undergoes annual structural and functional changes which are suggested to correlate with the male seasonal sexual behaviour. Further, the biological role of CK and ANP proteins together with their immunohistochemical expression in the camel poll gland suggests a stimulatory effect in the glandular secretory cells, and hence, they might modify camel sexual activity.
Annular atrophic lichen planus induced by anti‐HER2 antibodies
Authors: Chawla Sumir , Turner Nicholas , Terlizzo Monica , Heelan Kara 
Published: November 2020

AbstractPertuzumab and trastuzumab are monoclonal antibody inhibitors targeting human epidermal growth factor receptor 2 (HER‐2) and are increasingly being utilised in the management of HER2‐positive breast cancer, having been demonstrated to improve progression‐free survival in conjunction with docetaxel. We present a rare presentation of a lichenoid drug eruption, in an annular atrophic variant, in a 35‐year‐old woman after initiation of HER2‐inhibitor (pertuzumab and trastuzumab) therapy for metastatic breast cancer.