Miracle-dz/UniFAR-FTUs huggingface dataset:
Understanding a digital movement of opinion: the case of #RefugeesWelcome

ABSTRACT Recent work on digital political engagement has extensively shown that social media platforms enhance political participation and collective action. However, the idea that citizen voice through social media can give rise, under given conditions, to a specific digital force combining properties of social movements and public opinion has received less attention. We fill this gap by analysing the digital discussion around the Twitter hashtag #RefugeesWelcome as a case of ‘digital movement of opinion’ (DMO). When the refugee crisis erupted in 2015, an extraordinary wave of empathy characterized the publics’ reactions in key European hosting countries, especially as a result of viral images portraying refugee children as the main victims. Using a triangulation of network, content and metadata analysis, we find that this DMO was driven primarily by social media elites whose tweets were then echoed by masses of isolated users. We then test the post-DMO status of the hashtag-sphere after a potentially antithetical shock such as the November 2015 Paris terrorist attacks, which polarized the network public. Overall, we argue that the concept of DMO provides a heuristically useful tool for future research on new forms of digital citizen participation.
The Relation of Pro-Sociality to Self-Esteem: The Mediational Role of Quality of Friendships.

The present longitudinal study examined the role of quality of friendship in mediating the relation of pro-sociality to self-esteem over time. Participants were 424 Italian young adults (56% females) assessed at two waves (M(age) = 21.1 at Time 1; M(age) = 25 at Time 2). An autoregressive cross-lagged panel model was used to test the mediational model. Self- and friend-report measures of pro-sociality, quality of friendship, and self-esteem were included in the analyses. Results were in line with the hypothesized paths, with quality of friendship mediating the relation of pro-sociality to later self-esteem above and beyond its high stability. Self-esteem, in turn, predicted pro-sociality 4 years later. Overall, the present findings support the potential benefits of behaving pro-socially for an actor in terms of increased perceived self-worth and also expand previous work by outlining the specific mediational role of the quality of friendships. The theoretical and practical implications of these results are discussed.
The τ Herculid meteor shower and Comet 73P/Schwassmann–Wachmann 3

The τ Herculid meteor shower has not shown any appreciable activity since 1930. However, it is associated with Comet 73P/Schwassmann‐Wachmann 3, a Jupiter-family comet that split in 1995. The fragments will pass near the Earth on 2006 May 13, and could produce an outburst of the τ Herculid shower. However, by considering both meteoroids released during the splitting event and on previous perihelion passages back to 1801, we find no evidence for enhanced activity from this shower in 2006. This is a result partly of the dynamics of the parent comet, which suffers frequent close encounters with Jupiter, and partly of the location and timing of the splitting event, which produces a distribution of meteoroids that does not approach the Earth particularly closely. In fact, we show that the 1930 observations date from one of the few expected appearances of the τ Herculid shower and predict that detectable activity will be produced in 2022 and 2049. Ke yw ords: comets: individual: 73P/Schwassmann‐Wachman n3‐ meteors, meteoroids.
Tumour heterogeneity of DNA cell cycle variables in breast cancer measured by flow cytometry.

AIM/BACKGROUND: Conflicting results have been reported concerning the prognostic value of DNA flow cytometric variables (DNA ploidy, DNA index, %S phase fraction) in breast cancer. Selection bias and differences in treatment may have contributed to these conflicting prognostic results. Differences in tissue processing, the number of nuclei measured, DNA histogram/cell cycle analysis, and intra-tumour heterogeneity may also have played a role. The aim of the present study was to assess intra-tumour heterogeneity of DNA flow cytometric variables in breast cancer. METHODS: Fresh frozen specimens (n = 274) (0.3 x 0.3 x 0.3 cm) of 17 breast cancers and 167 slices, 50 microns thick, of 58 paraffin wax embedded blocks of 21 breast cancers were studied. All samples were prepared individually for DNA flow cytometry. DNA histograms were interpreted by semi-automated cell cycle analysis (MultiCycle) by two observers to avoid biased interpretation. An artificial averaged DNA histogram of each case was composed to simulate a sample prepared from whole tumour tissue. RESULTS: With regard to DNA ploidy, classified as diploid or aneuploid, the fresh frozen and paraffin wax embedded breast cancers showed intra-tumour heterogeneity in 53% and 38% of cases, respectively. For fresh frozen and paraffin wax embedded material, respectively, six samples had to be measured to detect the highest DNA ploidy class in 71% and 86% of cases. Averaged DNA histograms showed a loss of DNA aneuploidy in 36% and 6% of fresh frozen and paraffin wax embedded samples, respectively. High intra-tumour heterogeneity (wide ranges) was found for the %S phase fraction. Average %S phase fraction and average aneuploid %S phase fraction had the widest ranges at 9.5-31.6% and 0.0-62.7%, respectively. There was no correlation between the number of stemlines and intra-tumour %S phase variability on the one hand and tumour size and grade on the other. CONCLUSIONS: High intra-tumour heterogeneity for breast cancer was found for DNA ploidy, the DNA index and %S phase fraction as measured by flow cytometry, which may explain the conflicting prognostic results reported in the literature. To detect aneuploid cells, six samples may have to be prepared and measured separately. Measurement of these variables may be more reliable in paraffin wax sections because the thick slices provide a more representative sample. Prospective studies are required to determine whether the highest %S phase fraction value or the average value is more useful in the clinical context.
Alterations in the morphology of dendrites and dendritic spines in the nucleus accumbens and prefrontal cortex following repeated treatment with amphetamine or cocaine

Repeated treatment with psychostimulant drugs produces changes in brain and behaviour that far outlast their initial neuropharmacological actions. The nature of persistent drug‐induced neurobehavioural adaptations is of interest because they are thought to contribute to the development of dependence and addiction, and other forms of psychopathology, e.g. amphetamine psychosis. There are many reports that psychostimulants produce biochemical adaptations in brain monoamine systems, especially dopamine systems. The purpose of the present study was to determine if they might also alter the morphology of neurons in brain regions that receive monoaminergic innervation. Rats were given repeated injections of either amphetamine or cocaine, or, to control for general motor activity, allowed access to a running wheel. They were then left undisturbed for 24–25 days before their brains were processed for Golgi–Cox staining. Treatment with either amphetamine or cocaine (but not wheel running experience) increased the number of dendritic branches and the density of dendritic spines on medium spiny neurons in the shell of the nucleus accumbens, and on apical dendrites of layer V pyramidal cells in the prefrontal cortex. Cocaine also increased dendritic branching and spine density on the basilar dendrites of pyramidal cells. In addition, both drugs doubled the incidence of branched spines on medium spiny neurons. It is suggested that some of the persistent neurobehavioural consequences of repeated exposure to psychostimulant drugs may be due to their ability to reorganize patterns of synaptic connectivity in the nucleus accumbens and prefrontal cortex.
Molecular Phylogenetic Relatedness of Frenkelia spp. (Protozoa, Apicomplexa) to Sarcocystis falcatula Stiles 1893: Is the Genus Sarcocystis Paraphyletic?

ABSTRACT The coccidians Frenkelia microti and F. glareoli (Apicomplexa: Sarcocystidae) form tissue cysts in the brain of small rodents (intermediate hosts) while oocysts are formed in the intestine of final hosts, buzzards of the genus Buteo. The inclusion of the small subunit ribosomal RNA gene sequences (SSU rRNA) of both Frenkelia species into the SSU rRNA trees of other, tissue cyst‐forming coccidia strongly supports paraphyly of the genus Sarcocystis. Frenkelia spp. exhibit close relatedness to Sarcocystis falcatula Stiles 1893, a bird‐opossum parasite, recognized under its junior synonym S. neurona Dubey et al. 1991, as the causative agent of equine protozoan myeloencephalitis on the American continent. As the definition of the genus Frenkelia is based on a plesiomorphic character (affinity to the neural tissue) of supposedly low phylogenetic value, the synonymization of the genus Frenkelia with Sarcocystis is proposed. This renders the genus Sarcocystis monophyletic.
Time Allocation Decisions , Product Market Competition , and Welfare

In this paper a general equilibrium framework is used to analyse individuals’ time allocation decisions. Each individual decides upon two different uses of time: work and leisure. Due to the presence of increasing returns to labour, employers rank prospective employees according to the amount of work that they are willing to supply. In particular, they prefer individuals who allocate a relatively large share of time to work. If there is a positive probability of being unemployed, employers’ preferences induce individuals to allocate more time to work than they would if they were certain to find a job (or if there was no ranking on the part of the employers). Although the time allocation decisions of the individuals are biased towards work, if the distortion is not too large, welfare increases. A connection is made to the level of competition in the output market. In particular, the less competitive is the product market, the higher is the degree of job competition necessary to achieve the optimal allocation. If the economy is at a welfare maximising equilibrium, more output market competition should be accompanied by an increase in unemployment compensation to maintain the welfare maximising allocation. Finally, the bias towards work is more likely to have a negative impact on welfare when labour is highly productive.
Buffering relationship conflict consequences in teams working in real organizations

Purpose Relationship conflict has important negative organizational and personal consequences. However, papers analyzing how to buffer the negative effects of relationship conflict at work-unit level are lacking. This study aims to extend the literature by examining which specific conflict management styles used by work teams (avoiding, integrating and compromising) reduce or increase the link between relationship conflict and collective emotional exhaustion. Design/methodology/approach Regression analysis was conducted using 91 teams (398 employees) from 42 hotels and 42 restaurants. Findings Results revealed that, as it was expected, relationship conflict was positively related to emotional exhaustion at a team level; this relationship depended on how team members handle relationship conflicts. That is, avoiding and integrating conflict management styles buffered the link between relationship conflict and collective emotional exhaustion, whereas compromising increased this positive link. Research limitations/implications Organizations would include conflict management skills as a requirement for preventing negative consequences of conflict in teams, such as anxiety/depression and bullying. Originality/value By considering the unique perspective of team member’s shared perceptions of conflict management styles, important implications for the span of influence of collective perception of conflict on well-being have been indicated.
Towards Anonymity in Mobile Ad Hoc Networks The Chameleon Protocol and its Anonymity Analysis

Internet and mobile communications have had a profound effect on today's society. New services are constantly being deployed, in which personal data are being processed in return for personally tailored services. While mobile networks lay the groundwork for new innovative services, at the same time they pose numerous privacy challenges. There is the risk that honest citizens participating in mobile communications will have their privacy invaded for "the greater good". We argue that it is highly important that individuals are empowered to retain control over their personal spheres. Thus, the goal of this thesis is to design and evaluate anonymous overlay networks} adapted for mobile networks that allow users to control which information leaves their personal spheres in a mobile communication. Technically, by using an anonymous overlay network, users can communicate with their communication partners without disclosing their network identities. In this thesis, we propose three different anonymous overlay networks tailored for mobile networks. First, two approaches are proposed for anonymous browsing on the mobile Internet, namely mCrowds and a Tor-based approach. By applying theoretical analysis and\,/\,or practical experiments, we show that these approaches offer an appropriate trade-off between the offered degree of anonymity and performance loss. Second, an anonymous overlay network for use in mobile ad hoc networks - Chameleon - is suggested. Besides the actual design of these anonymous overlay networks, this thesis provides novel contributions in other essential areas of privacy protection and anonymous communication. First, also non-technical aspects of privacy protection are thoroughly discussed, including legal, social, and user interface aspects. Second, we survey existing metrics for quantifying anonymity and also propose new ideas regarding anonymity metrics. Third, we review and classify existing mechanisms for anonymous communication in mobile ad hoc networks. Lastly, we also propose a cryptographic technique for building up the user base of an anonymous overlay network in a secure and privacy-friendly manner.
The activity of isolated neurons and the modulatory state of an isolated nervous system represent a recent behavioural state

ABSTRACT Behavioural/motivational state is known to influence nearly all aspects of physiology and behaviour. The cellular basis of behavioural state control is only partially understood. Our investigation, performed on the pond snail Lymnaea stagnalis whose nervous system is useful for work on completely isolated neurons, provided several results related to this problem. First, we demonstrated that the behavioural state can produce long-term changes in individual neurons that persist even after neuron isolation from the nervous system. Specifically, we found that pedal serotonergic neurons that control locomotion show higher activity and lower membrane potential after being isolated from the nervous systems of hungry animals. Second, we showed that the modulatory state (the chemical neuroactive microenvironment of the central ganglia) changes in accordance with the nutritional state of an animal and produces predicted changes in single isolated locomotor neurons. Third, we report that observed hunger-induced effects can be explained by the increased synthesis of serotonin in pedal serotonergic neurons, which has an impact on the electrical activity of isolated serotonergic neurons and the intensity of extrasynaptic serotonin release from the pedal ganglia. Summary: In the pond snail Lymnaea stagnalis, the behavioural state can produce long-term changes in individual neurons that persist even after neuron isolation from the nervous system as well as alterations in the neurochemical microenvironment of the central ganglia.
Decay laws, anisotropy and cyclone–anticyclone asymmetry in decaying rotating turbulence

The effect of a background rotation on the decay of grid-generated turbulence is investigated from experiments using the large-scale ‘Coriolis’ rotating platform. A first transition occurs at 0.4 tank rotation (instantaneous Rossby number Ro ≃ 0.25), characterized by a t−6/5 → t−3/5 transition of the energy-decay law. After this transition, anisotropy develops in the form of vertical layers, where the initial vertical velocity fluctuations remain trapped. The vertical vorticity field develops a cyclone–anticyclone asymmetry, reproducing the growth law of the vorticity skewness, Sω(t) ≃ (Ωt)0.7, reported by Morize, Moisy & Rabaud (Phys. Fluids, vol. 17 (9), 2005, 095105). A second transition is observed at larger time, characterized by a return to vorticity symmetry. In this regime, the layers of nearly constant vertical velocity become thinner as they are advected and stretched by the large-scale horizontal flow, and eventually become unstable. The present results indicate that the shear instability of the vertical layers contributes significantly to the re-symmetrization of the vertical vorticity at large time, by re-injecting vorticity fluctuations of random sign at small scales. These results emphasize the importance of the nature of the initial conditions in the decay of rotating turbulence.
Investigating Relationship between Accounting Students’ Learning Style Preferences and their Academic Performance at a University of Technology in South Africa

Abstract The purpose of this study was to explore the association between accounting students’ learning style preferences and their academic performance at an institution of higher learning in South Africa. Kolb’s Learning Style Inventory (LSI) was used to identify the learning style preferences of the first, second and third year accounting students. The students’ academic performance for accounting was based on the scores obtained in the final examination assessment component. A purposeful sample of first, second and third year students registered for a Bachelor of Education degree were used in this study. The findings indicated that the majority of the first-year students were the convergers whereas the results for the second and third year students revealed that the majority were divergers. The results further revealed that the relationship between first year students’ learning styles and academic performance was significant whereas there was no significant relationship between second and third year students’ learning styles and their academic performance.
A belief revision method based on argumentative dialogue model

Belief is Agents' cognition of surrounding. Due to the dynamics of the environment, the new received belief may be conflicted with the original belief set when an agent got new information. Belief revision is to make sure the new belief set is a conflict-free set in this moment. This paper proposes a combined with debate way of belief revision, which use certainty-factor based argumentative framework to represent the uncertainty of knowledge and uncertainty reasoning, to get a belief set with the corresponding certainty factor. Finally the result belief set will be received by a setting certainty-factor threshold value. Proved by the experiment, the new accepted belief may not be included in the revised credible belief set, and credible belief set is conflict-free. Belief revision algorithm, therefore, have broken the traditional way of belief revision, and effectiveness.
The Association Between Exposure to Poverty and Anxiety in Middle Childhood: Examination of the Modulating Roles of Coping, Responses to Stress, and Threat Bias Neural Activity

This study examined the relationship between the amount of time spent living in poverty since birth and self-reported symptoms of anxiety in middle childhood. Several models were tested with consideration to the potential modulating roles of coping strategies, responses to stress, and threat bias neural functioning. Exposure to poverty is associated with increased risk for anxiety throughout childhood, adolescence, and into young adulthood (McLoyd, 1998, Najman et al., 2010). Individual factors such as use of various coping strategies and responses to stress, as well as neural processes related to attentional bias toward threat, have been shown to differentially impact risk for anxiety (Bar-Haim et al., 2007; Grant et al., 2003; Wadsworth & Berger, 2006). However, the relationships between exposure to poverty, use of specific coping strategies and responses to stress, threat bias neural functioning, and anxiety symptoms is unknown. In the current study, exposure to poverty, coping and responses to stress, and symptoms of anxiety were measured by child and parent report during a visit to the family’s home. Child brain activation during an attentional threat-bias task was then assessed using functional magnetic resonance imaging (fMRI). The amount of time spent in poverty since birth was correlated with anxiety symptoms. The effect of time spent in poverty since birth was strengthened by endorsement of low levels of involuntary disengagement to result in increased levels of anxiety symptoms. Lastly, the amount of time spent in poverty since
Aerosol climatology over Nile Delta based on MODIS, MISR and OMI satellite data

Abstract. Since 1999 Cairo and the Nile delta region have suffered from air pollution episodes called the "black cloud" during the fall season. These have been attributed to either burning of agriculture waste or long-range transport of desert dust. Here we present a detailed analysis of the optical and microphysical aerosol properties, based on satellite data. Monthly mean values of Moderate Resolution Imaging Spectroradiometer (MODIS) aerosol optical depth (AOD) at 550 nm were examined for the 10 yr period from 2000–2009. Significant monthly variability is observed in the AOD with maxima in April or May (~0.5) and October (~0.45), and a minimum in December and January (~0.2). Monthly mean values of UV Aerosol Index (UVAI) retrieved by the Ozone Monitoring Instrument (OMI) for 4 yr (2005–2008) exhibit the same AOD pattern. The carbonaceous aerosols during the black cloud periods are confined to the planetary boundary layer (PBL), while dust aerosols exist over a wider range of altitudes, as shown by Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) aerosol profiles. The monthly climatology of Multi-angle Imaging SpectroRadiometer (MISR) data show that the aerosols during the black cloud periods are spherical with a higher percentage of small and medium size particles, whereas the spring aerosols are mostly large non-spherical particles. All of the results show that the air quality in Cairo and the Nile delta region is subject to a complex mixture of air pollution types, especially in the fall season, when biomass burning contributes to a background of urban pollution and desert dust.