bluuebunny/crossref_metadata_2025_split huggingface dataset:
Globalized inexact proximal Newton-type methods for nonconvex composite functions
Authors: Kanzow Christian , Lechner Theresa 
Published: November 2020

AbstractOptimization problems with composite functions consist of an objective function which is the sum of a smooth and a (convex) nonsmooth term. This particular structure is exploited by the class of proximal gradient methods and some of their generalizations like proximal Newton and quasi-Newton methods. The current literature on these classes of methods almost exclusively considers the case where also the smooth term is convex. Here we present a globalized proximal Newton-type method which allows the smooth term to be nonconvex. The method is shown to have nice global and local convergence properties, and some numerical results indicate that this method is very promising also from a practical point of view.
A large wild salmon stock shows genetic and life history differentiation within, but not between, rivers
Authors: Miettinen Antti , Palm Stefan , Dannewitz Johan , Lind Emma , Primmer Craig R. , Romakkaniemi Atso , Östergren Johan , Pritchard Victoria L. 
Published: November 2020

AbstractAnadromous salmonid fishes frequently exhibit strong geographic population structuring. However, population genetic differentiation of Atlantic salmon (Salmo salar) at fine geographic scales differs across equivalent spatial extents in different regions. So far, fine-scale genetic differentiation has not been assessed in rivers of the Baltic Sea, a region that contains an evolutionarily distinct Atlantic salmon lineage. Thus, Baltic salmon are currently managed on the river level, without focus on potential genetic structure and diversity within rivers. Here, we used microsatellites to characterize the genetic structure of wild juvenile salmon sampled throughout the interconnected, northern Baltic Tornio and Kalix Rivers. We found genetic differentiation within the two rivers, but not between them: salmon in the upper reaches differed from individuals in the lower reaches, regardless of river system. Further, examining smolts migrating from the river to the sea and adults returning from the sea to spawn, we found an association between the genetic structure and seasonal migration timing. Out-migrating smolts genetically assigned to upper river reaches were older and tended to reach the sea later in the season than smolts from the lower reaches. In contrast, mature adults originating from the upper reaches returned to the river early in the season. Our observation of genetic population structuring between downstream and upstream reaches of the large Tornio and Kalix rivers, and its association with migration timing, implies that careful temporal management of the northern Baltic fisheries would help to preserve the diversity and sustainability of the wild salmon stocks of these rivers.
Mapping the field of research on African higher education: a review of 6483 publications from 1980 to 2019
Authors: Zavale Nelson Casimiro , Schneijderberg Christian 
Published: November 2020

AbstractFollowing a global trend, higher education (HE) in Africa has also become a complex enterprise, potentially demanding specific expertise in higher education research. However, despite this, there is a dearth of analysis into the state of research on African HE. This paper seeks to fill this gap by mapping and analysing African HE research. We undertake a systematic review of 6483 articles and books focusing on African HE published from 1980 to 2019 in indexed and non-indexed journals and book-publishers. We particularly examine the evolution of publications, the journals and book publishers, the authors’ affiliations, the researched countries, the publications’ thematic classification, the most prolific authors, and the most influential publications. Based on this analysis, we draw four main conclusions. First, research on African HE is a rather recent phenomenon or has witnessed a recent rise or renewal. Second, a few selected journals and book-publishers, particularly those with a strong regional or international reputation, dominate the field. Third, four communities of researchers are more represented: the community researching teaching and learning issues, the community focusing on structural transformation of HE, the community focusing on the internal organisation of HE and the community focusing on societal engagement of HE. Four, South Africa dominates the field both as home to most of the authors (including the most prolific) and the empirical field of most publications (including the most influential). If South Africa is excluded, African HE research is weak, but some communities are emerging, particularly in West, East and Southern Africa.
The Role of Decision-Making in Psychological Wellbeing and Risky Behaviours in Autistic Adolescents Without ADHD: Longitudinal Evidence from the UK Millennium Cohort Study
Authors: Hosozawa Mariko , Mandy William , Cable Noriko , Flouri Eirini 
Published: November 2020

AbstractThis study examined the development of decision-making and its association with psychological wellbeing and risky behaviours in adolescents with and without autism. Participants included 270 autistic and 9,713 typically developing adolescents. In both samples, those with a diagnosis of attention-deficit/hyperactivity disorder (ADHD) were excluded. Data came from the Millennium Cohort Study, a nationally representative population-based birth cohort. Decision-making was assessed using the Cambridge Gambling Task at ages 11 and 14. Psychological wellbeing (happiness, self-esteem, depressive symptoms and self-harm) and risky/antisocial behaviours were self-reported at age 14. After adjusting for sex, cognitive ability, spatial working memory, socioeconomic status and pubertal status, autistic adolescents showed comparable quality of decision-making to that of their peers at both ages but also a more deliberative decision-making style as they aged. Only in autistic adolescents was this decision-making style associated with positive outcomes.
Effort-Reward Imbalance at Work and Overcommitment in Patients with Acute Myocardial Infarction (AMI): Associations with Return to Work 6 Months After AMI
Authors: Ruile Sarah , Meisinger Christine , Burkhardt Katrin , Heier Margit , Thilo Christian , Kirchberger Inge 
Published: November 2020

AbstractPurposeStress-related factors influence the adaptation to life after acute myocardial infarction (AMI), including return to work. The goal of this study was to investigate the effect of work-related stress, (expressed by the effort-reward imbalance (ERI) model) on return to work after AMI.MethodsA longitudinal study with AMI patients was conducted in order to assess associations between the independent variables effort, reward, ERI and overcommitment and the outcome return to work after AMI. Return to work was inquired at 6 months follow-up. Logistic regression models were applied in the analysis. The fully-adjusted model included demographic, clinical, social, stress-related and health-related quality of life (HRQOL) covariables.ResultsOf the 346 enrolled patients aged 31 to 82 years, 239 (69.1%) were included in the regression analysis. In the unadjusted model ERI presented an odds ratio (OR) of 1.72 (95% confidence interval (CI) 0.86–3.42). Associations for effort and overcommitment were 0.98 (95% CI 0.83–1.15) and 1.09 (95% CI 0.99–1.18). However, reward showed a significantly inverse association with return to work with an OR of 0.90 (95% CI 0.83–0.99). In the fully adjusted model the OR of ERI decreased to 1.20 (95% CI 0.49–2.96). Effort, reward and overcommitment also showed attenuated ORs without significant results in all models. Diabetes mellitus, current smoking, low physical and low mental HRQOL presented significantly negative relations with return to work.ConclusionsWork-related stress appears less important than HRQOL and resilience in terms of return to work after AMI.
Country-Level Structural Stigma, School-Based and Adulthood Victimization, and Life Satisfaction Among Sexual Minority Adults: A Life Course Approach
Authors: van der Star Arjan , Pachankis John E. , Bränström Richard 
Published: November 2020

AbstractCountry-level structural stigma, defined as prejudiced population attitudes and discriminatory legislation and policies, has been suggested to compromise the wellbeing of sexual minority adults. This study explores whether and how structural stigma might be associated with sexual minorities’ school-based and adulthood experiences of victimization and adulthood life satisfaction. Using a sample of 55,263 sexual minority individuals (22% female; 53% 18–29 years old; 85% lesbian/gay, 15% bisexual) living across 28 European countries and a country-level index of structural stigma, results show that sexual minorities, especially men, reported school bullying in both higher- and lower-stigma countries. Higher rates of school bullying were found among sexual minorities living in higher-stigma countries when open about their identity at school. Past exposure to school bullying was associated with lower adulthood life satisfaction, an association partially explained by an increased risk of adulthood victimization. These findings suggest that sexual minorities living in higher-stigma countries might benefit from not being open about their sexual identity at school, despite previously established mental health costs of identity concealment, because of the reduced risk of school bullying and adverse adulthood experiences. These results provide one of the first indications that structural stigma is associated with sexual minority adults’ wellbeing through both contemporaneous and historical experiences of victimization.
The legitimacy of global accounting rules: a note on the challenges from path-dependence theory
Authors: Pittroff Esther 
Published: November 2020

AbstractThis paper discusses the legitimacy of the convergence of accounting regulation from the view of path-dependence theory. It is argued here that legitimacy of converged accounting rules is almost impossible to achieve because of the path-dependent development of corporate governance systems, which depends on the prevailing norms and beliefs of society. The different elements of corporate governance systems have to be consistent with these values in order to achieve the real convergence of accounting standards. The paper analyses the development of accounting convergence and discusses different convergence strategies from the view of legitimacy theory and path-dependence theory. Finally, the paper presents a hypothetical solution under which real convergence of accounting standards seems possible. The results of the paper are relevant for accounting research, and important to regulators as well, because, by analysing the factors that influence convergence, the paper is able to help us to understand why real convergence of accounting regulation may be difficult to achieve.
Transport of Turbulence Across Permeable Interface in a Turbulent Channel Flow: Interface-Resolved Direct Numerical Simulation
Authors: Chu Xu , Wang Wenkang , Yang Guang , Terzis Alexandros , Helmig Rainer , Weigand Bernhard 
Published: November 2020

AbstractTurbulence transportation across permeable interfaces is investigated using direct numerical simulation, and the connection between the turbulent surface flow and the pore flow is explored. The porous media domain is constructed with an in-line arranged circular cylinder array. The effects of Reynolds number and porosity are also investigated by comparing cases with two Reynolds numbers ($$Re\approx 3000,6000$$

R
e
≈
3000
,
6000

) and two porosities ($$\varphi =0.5,0.8$$

φ
=
0.5
,
0.8

). It was found that the change of porosity leads to the variation of flow motions near the interface region, which further affect turbulence transportation below the interface. The turbulent kinetic energy (TKE) budget shows that turbulent diffusion and pressure transportation work as energy sink and source alternatively, which suggests a possible route for turbulence transferring into porous region. Further analysis on the spectral TKE budget reveals the role of modes of different wavelengths. A major finding is that mean convection not only affects the distribution of TKE in spatial space, but also in scale space. The permeability of the wall also have an major impact on the occurrence ratio between blow and suction events as well as their corresponding flow structures, which can be related to the change of the Kármán constant of the mean velocity profile.
Microbial population dynamics during traditional production of Mabisi, a spontaneous fermented milk product from Zambia: a field trial
Authors: Groenenboom Anneloes E. , Shindano John , Cheepa Nachimuka , Smid Eddy J. , Schoustra Sijmen E. 
Published: November 2020

AbstractMabisi is a fermented milk product, traditionally produced in a calabash by uncontrolled fermentation. Due to high costs and a reduced availability of calabashes, nowadays plastic containers are also used for Mabisi production. However, the effect of this change in production practice on the properties of the product has not been documented. Therefore, we aimed at determining the effect of fermentation vessels and types of back-slopping on acidification and microbial communities during fermentation. A series of fifteen experiments using two types of fermentation vessels (plastic buckets and calabashes) in combination with different types of back-slopping (no back-slopping, passive back-slopping, and active back-slopping) were set up at a field site in rural Zambia. In each of the fifteen fermentations we analysed acidification rate of traditional Mabisi fermentation and bacterial diversity over time. No significant difference was found in terms of microbial diversity during and at the end of fermentation between fermentations performed in buckets or previously used calabashes. Bacterial communities in general decreased in diversity over time, where the drop in pH correlated with a decrease in Shannon Index. In case of active back-slopping, the pH drop started right after inoculation while in the no back-slopping and passive back-slopping fermentations, there was a clear lag phase before acidification started. All experimental series resulted in a microbial community dominated by Lactococcus lactis and a Shannon Index, as a measure for diversity, between 0.6 and 2.0. The use of plastic buckets for Mabisi fermentation can be a valuable alternative to the use of calabashes as this study showed no biological and physico-chemical differences between Mabisi resulting from both fermentation vessels, although the reason for perceived differences should be further investigated.
Upregulation of miRNA-23a-3p rescues high glucose-induced cell apoptosis and proliferation inhibition in cardiomyocytes
Authors: Wu Fang , Wang Feng , Yang Qian , Zhang Yawen , Cai Ke , Liu Lian , Li Shuchun , Zheng YuanZheng , Zhang Jialing , Gui Yiting , Wang Youhua , Wang Xu , Gui Yonghao , Li Qiang 
Published: November 2020

AbstractMaternal hyperglycemia potentially inhibits the development of the fetal heart by suppressing cardiomyocyte proliferation and promoting apoptosis. Different studies have indicated that miRNAs are key regulators of cardiomyocyte proliferation, differentiation, and apoptosis and play a protective role in a variety of cardiovascular diseases. However, the biological function of miRNA-23a in hyperglycemia-related cardiomyocyte injury is not fully understood. The present study investigated the effect of miRNA-23a-3p on cell proliferation and apoptosis in a myocardial injury model induced by high glucose. H9c2 cardiomyocytes were exposed to high glucose to establish an in vitro myocardial injury model and then transfected with miRNA-23a-3p mimics. After miRNA-23a-3p transfection, lens-free microscopy was used to dynamically monitor cell numbers and confluence and calculate the cell cycle duration. CCK-8 and EdU incorporation assays were performed to detect cell proliferation. Flow cytometry was used to measured cell apoptosis. Upregulation of miRNA-23a-3p significantly alleviated high glucose-induced cell apoptosis and cell proliferation inhibition (p < 0.01 and p < 0.0001, respectively). The cell cycle of the miRNA-23a-3p mimics group was significantly shorter than that of the negative control group (p < 0.01). The expression of cell cycle–activating and apoptosis inhibition-associated factors Ccna2, Ccne1, and Bcl-2 was downregulated by high glucose and upregulated by miRNA-23a-3p overexpression in high glucose-injured H9c2 cells. miRNA-23a-3p mimics transfection before high glucose treatment had a significantly greater benefit than transfection after high glucose treatment (p < 0.0001), and the rescue effect of miRNA-23a-3p increased as the concentration increased. This study suggests that miRNA-23a-3p exerted a dose- and time-dependent protective effect on high glucose-induced H9c2 cardiomyocyte injury.
Early snowmelt reduces aphid abundance (Aphis asclepiadis) by creating water-stressed host plants (Ligusticum porteri) and altering interactions with ants
Authors: Mooney Emily , Mullins Maria , Den Uyl James , Trail Samantha , Nguyen Phuong , Owens Janel , Godtfredsen Elsa , Heschel Shane 
Published: November 2020

AbstractDeclining snow cover is reshaping ecological communities. Early loss of snow cover initiates changes in key interactions that mediate herbivore abundance, i.e., top-down and bottom-up effects. In this study, we used a field experiment to test the effects of host plant water stress and phenology on the multitrophic interactions that determine aphid abundance. The aphid, Aphis asclepiadis, in our study system colonizes the flowering stalks of the host plant Ligusticum porteri and relies on a protection mutualism with ants. We added snow and water to replicate host plants and tested for a variety of phenological and physiological responses to these treatments. Relative to host plants in ambient conditions, both water and snow addition reduced key signals of water stress (senescence and abscisic acid levels) and increased seed set. While aphid colonies were generally larger with reduced host plant water stress, the ant–aphid mutualism interacted with plant quality in complex ways. Without ant tending, we did not detect differences in aphid colony growth with host plant treatment. When tended by ants, aphid colony growth was greatest on host plants with snow addition. Host plant quality also altered the benefits exchanged in this mutualism. Ant-tended colonies hosted by plants with snow addition produced honeydew enriched in trehalose, which may have decreased both ant and natural enemy abundance. Our results suggest that early loss of snow reduces aphid abundance by creating low-quality, water-stressed host plants, and this effect may be exacerbated by natural enemies and the costs of ant attendance.
The psychometric properties and clinical utility of the Norwegian versions of the deliberate self-harm inventory and the inventory of statements about self-injury
Authors: Vigfusdottir Johanna , Dale Karl Yngvar , Gratz Kim L. , Klonsky E. David , Jonsbu Egil , Høidal Reidun 
Published: November 2020

AbstractDeliberate self-harm (DSH) is a widespread transdiagnostic health problem with increasing prevalence among adolescences, and young adults. It is therefore essential to effectively chart the epidemiology of DSH, as well as to assess the efficacy of interventions designed to modify this behavior. The aim was to translate and analyze the psychometric properties of the Norwegian versions of two instruments designed to assess DSH: the Deliberate Self-harm Inventory (DSHI) and the Inventory of Statements About Self-Injury (ISAS), as well as to assess the prevalence of DSH within a nonclinical Norwegian adult population. Of the 402 participants who completed a questionnaire packet comprising the DSHI, ISAS, general questions about DSH, and other related measures, 30.6% reported some form of DSH. Those with a history of DSH reported greater difficulties with emotion regulation than those without. Participants with and without a history of DSH did not differ in unrelated constructs, including social desirability. The frequency of specific DSH behaviors was in accordance with previous research, with cutting being the most frequent. The factor structure of DSH functions in the Norwegian ISAS was generally comparable to the factor structure of the English version. Overall, results indicate that: a) the Norwegian versions of the DSHI and ISAS behave as expected and in accordance with prior research in other languages and other populations, and b) both the DSHI and ISAS have high internal consistency and adequate construct, convergent, and discriminant validity, and may be applied to evaluate DSH in adult Norwegian populations.
Menatanthus mosbruggeri gen. nov. et sp. nov. – A flower with in situ pollen tetrads from the Paleocene maar lake of Menat (Puy-de-Dôme, France)
Authors: Uhl Dieter , Paudayal Khum N. , Hervet Sophie , El Atfy Haytham 
Published: November 2020

AbstractThe Paleocene Fossil-Lagerstätte Menat in France is well known for its wealth of outstandingly well preserved fossil insects and plants. Despite being known for more than a century, the palaeoflora, which is regarded as typical for the late Thanetian by some authors, has largely been neglected since the 1940s. New excavations and surveys yielded exceptionally well-preserved plant material, including a minute, heptamerous flower bearing in situ pollen tetrads, comparable to tetrads of the modern ericacean genusKalmiaL, in its anthers. The only known modern ericacean genus which is characterised by heptamerous flowers isBejariaMutis ex L., a basal relative of the tribe Phyllodoceae within Ericaceae, which also includes the genusKalmiain a relatively basal position. However, heptamerous flowers also occur very rarely (mostly interpreted as teratologies) in a number of other modern Ericaceae, but also in various other modern angiosperm families. Due to the unique combination of a heptamerous flower withKalmia-type pollen tetrads within the anthers, the new taxonMenatanthus mosbruggerigen. nov. et sp. nov. is erected. The lack of morphological data from the flower itself and the fact that comparable pollen tetrads can be produced by a number of modern families, however, prevent an assignment of the new taxon to any known angiosperm family.
Impact of machining-induced surface defects on the edge formability of commercially pure titanium sheet at room temperature
Authors: Kwame J. S. , Yakushina E. , Blackwell P. 
Published: November 2020

AbstractDespite the good properties of titanium, which have drawn the interest of various industries over the years, one of the major drawbacks of this material is its poor machinability. This has largely been attributed to its low thermal conductivity and elastic modulus. The ability to attain the optimum sheet edge performance during forming is dependent on the quality of the edges produced. Also, the demanding nature of aerospace part design has provoked the interest of both industry and academia to continually explore avenues tailored at enhancing part performance. The sort of edge surface integrity produced for aerospace part fabrication thus becomes a vital consideration in the quest to ensuring prime performance of components. This work seeks to study the influence of different machining-induced surface defects on the sheet edge performance of CP-Ti (grade 2) at room temperature. Hole expansion test was used to assess the edge surface formability of CP-Ti with different machining-induced edge defects. The research found that machining-induced surface defects act as stress concentration sites during the hole expansion test and have a major impact on the material flow. Electro-discharge machined edges were observed to exhibit high edge formability compared to laser and abrasive water jet cut edges due to the impact of machining-induced microstructural changes.