Miracle-dz/UniFAR-FTUs huggingface dataset:
Fast mixing for attractors with a mostly contracting central direction

Bonatti and Viana introduced a robust (non-empty interior) class of partially hyperbolic attractors of C2-diffeomorphisms on a compact manifold, for which they construct Sinai–Ruelle–Bowen measures. For some such robust examples, we prove the exponential decay of correlations and the central limit theorem, in the space of Hölder continuous functions. For the proof, we adapt the techniques (backward inducing, redundancy elimination algorithm) we have previously developed.
Public Ephemera: A case study investigation into individual learning experiences at Nocturne: Art at Night

Temporary public art events modelled after the Nuit Blanche concept attract thousands of people to city centres in search of contemporary art. As a result, these mass cultural events may be dramatically changing how people interact with contemporary art. This qualitative research project utilizes Nocturne: Art at Night, a city wide, night time art event in Halifax, Nova Scotia, as a case study to determine the kinds of learning experiences everyday people have when they engage with art in the context of a temporary public art festival. This research identified factors that influence participants’ understanding and appreciation of contemporary art. Eleven participants without a Fine Arts background were interviewed before and after attending the event. Findings suggest that participants benefit greatly from being able to select which works to engage with and from having numerous and diverse projects to view. Artworks that build on participants’ past experiences and knowledge of specific installation sites also positively impacted learning. The atmosphere and social aspects of participants’ experiences such as interactions with peers and artists were seen as beneficial to participants’ learning experiences. Short viewing times and lack of adequate signage or contextual information were found to be detrimental to participants’ learning, leading to superficial experiences with art. This study determined that cultural events such as Nocturne provide attendees with a preliminary introduction to contemporary art. However, without additional resources, participants could formulate misconceptions about art that affect their understanding of particular artworks.
Do equity and foreign currency risk premiums display common patterns

In da Co"ta et al. (2006) we have shown how a same pricing kernel can account for the exces" returns of the S&:P500 over the US short term bond and of the uncovered over the covered trading of foreign government bonds. In this paper we estimate and test the overidentifying restrictiom; of Euler equations associated with "ix different versions of the Consumption Capital Asset Pricing I\Iodel. Our main finding is that the same (however often unreasonable) values for the parameters are estimated for ali models in both nmrkets. In most cases, the rejections or otherwise of overidentifying restrictions occurs for the two markets, suggesting that success and failure stories for the equity premium repeat themselves in foreign exchange markets. Our results corroborate the findings in da Costa et al. (2006) that indicate a strong similarity between the behavior of excess returns in the two markets when modeled as risk premiums, providing empirical grounds to believe that the proposed preference-based solutions to puzzles in domestic financiaI markets can certainly shed light on the Forward Premium Puzzle. JEL Code: G12: G15
The Bost-Connes phase transition and unitary representations

We construct a family of unitary representations of the ax + b group Q o Q +. We show that this family of representations exhibits a \phase transition" analogous to that observed by Bost and Connes (Selecta Math., New Series, 1 (1995)), and then explain how these representations are related to the equilibrium states of Bost and Connes.
Vibrational Energy Transfer in Helices

Rates of vibrational energy transfer in the five largest a helices of myoglobin are calculated. Energy transfer in helices occurs by anharmonic coupling of spatially overlapping localized normal modes in resonance, which is also the mechanism for energy transfer among localized modes of a glass. As a result, rates of energy transfer from higher-frequency modes of the helices typically vary little with temperature. Variation of the energy transfer rate with mode frequency is captured by a model of an anharmonic one-dimensional glass.
Inquérito para agentes rickettsiais em carrapatos Rhipicephalus sanguineus (Ixodida, Ixodidae) no Nordeste do Brasil

In this study, rickettsial infection was searched in 108 canine blood samples and 22 Rhipicephalus sanguineus (Ixodida,Ixodidae) ticks collected on these dogs during 2011 and 2012 in Patos municipality, state of Paraiba, northeasternBrazil. Blood samples were tested through indirect immunofluorescence assay (IFA) by using antigens of six Rickettsiaspecies isolates from Brazil. All 108 dogs tested seronegative for R. rickettsii, R. parkeri, R. amblyommii, R. felis, R.rhipicephali, and R. bellii antigens, suggesting a non-endemic status of the studied region for spotted fever ricketsiosis.Among 22 R. sanguineus ticks, R. felis was detected in one (4.5%) specimen by PCR targeting a portion of the rickettsialgltA gene. The possible implications of this unusual PCR finding are discussed.
Growth and chronology of the rhodolith-forming, coralline red alga Sporolithon durum

We report extension rates and growth patterns of the coralline red alga Sporolithon durum (rhodolith form) from New Caledonia. Alizarin red S staining was used to mark 43 rho do lith branches and helped determine extension rates over the rhodoliths’ last living year. A combination of radiocarbon dating, major Mg/Ca ratio cycles and growth band determinations provided a chronological approach to characterise extension rates for 5 branches over the last 5 decades. A seasonal asymmetry in the extension rates was observed, with higher extension during the austral summer−fall−winter period, indicating that variations in ambient seawater temperature are not of major influence in the seasonal growth pattern of S. durum. At the sub-seasonal level, minor growth bands were observed with a maximum frequency of 14 d but were too variable to be considered as a reliable chronological tool. The concordance of the results from both the monitoring experiment over the year 2010 to 2011 and the chronological approach applied to the period 1968 to 2008 suggests that an extension rate (mean ± SD) of 0.6 ± 0.2 mm yr−1 is typical of the S. durum community at the study site. However, annual extension rates varied considerably among branches and individuals. Long-term trends still appeared, such as a decrease during the early 1970s attributed to the impact of mining activity. A slight but consistent decrease was observed in the annual extension rates throughout the record and may reflect an ontogenic effect potentially enhanced by reduced light penetration due to increasing suspended particulate matter in the water column.
Direct numerical simulation of turbulent channel flow over a liquid-infused micro-grooved surface

The effort to reduce drag in turbulent boundary layer flow has long been the motivation of many researches. Recently a superhydrophobic surface (SHS) has drawn much attention as a passive device to achieve high drag reduction. Despite the high performance promised at ideal conditions, maintaining the interface in real flow conditions is an intractable problem. A non-wetting surface, known as the slippery liquidinfused porous surface (SLIPS) or the lubricant-impregnated surface (LIS), has shown a potential for significant drag reduction, as the working fluid slips at the interface but cannot penetrate into the lubricant layer. In the present study, we perform direct numerical simulations of turbulent channel flow over a superhydrophobic surface and a liquidinfused micro-grooved surface to investigate the effects of this surface on the slip at the interface and drag reduction. The flow rate of water is maintained constant corresponding to Reτ∼180 in a fully developed turbulent channel flow, and the lubricant layer is sheardriven by the turbulent water flow. The lubricant layer is also simulated with the assumption that the interface is flat (i.e. the surface tension effect is neglected). The solid substrate in which the lubricant is infused is modelled as straight longitudinal ridges,
A Comprehensive review on the genus Plumbago with focus on Plumbago auriculata (Plumbaginaceae)

Background: The genus Plumbago distributed in warm tropical regions throughout the world is the largest genus in Plumbaginaceae. Medicinal plants are characteristic to the genus Plumbago and are cultivated and utilized worldwide. Plumbago auriculata Lam. is common in South Africa and is often cultivated for its ornamental and medicinal uses throughout the world. Materials and Methods: A comprehensive review of the genus Plumbago with focus on Plumbago auriculata was carried out and information was gathered using scientific publications, conference proceedings, the internet and books. Articles based on the morphology, pharmacological and medicinal uses of Plumbago auriculata was analysed thoroughly. Results: Plumbago auriculata plant parts posses a wide range of phytochemicals with plumbagin being the marker compound showing various pharmacological activities. Different plant parts are claimed to be used for the treatment of human and animal ailments, however they do exhibit toxic properties and need to be administered with caution. Salt secreting glands and trichomes are characteristic of Plumbaginaceae. Conclusion: This study reveals new insights on the genus Plumbago and the potential use of species in the genus as medicinal plants. Plumbago auriculata possess the bioactive compound plumbagin and secondary metabolites, thus, it is of high medicinal importance. P. auriculata is a poorly nor favourite studied species in the genus Plumbago and further research needs to be carried out to explore specific details of the species.
The Lived Experiences of Men in 12-Step Recovery against a Backdrop of Hegemonic Masculinity

Summary: Hegemonic masculinity is a theoretical construct within sociology and represents socially constructed conceptions of dominant masculinity. Much of the sociological literature links aspects of this form of masculinity to men’s poor health status, including a range of societal ills such as substance abuse. 12-step recovery is a widely endorsed model of addiction recovery which is based on spiritual principles. The features of hegemonic masculinity and 12-step recovery appear to be at odds with each other. This paper is based on the findings of a small qualitative study exploring the lived experiences of six men in 12-step recovery against a backdrop of hegemonic masculinity. The findings show how the active construction of hegemonic masculinity evolved throughout the life course of the men. A central theme to emerge is one of old and new formations of identity. Additionally, hegemonic masculinity interacts in a number of ways with the men’s recovery.
EVIDENCE FOR COVALENT LINKAGES BETWEEN CHITIN AND BETA-GLUCAN IN A FUNGAL WALL

SUMMARY: Covalent linkages between chitin and β-glucan in the wall of Schizophyllum commune were indicated by the markedly changed solubility characteristics of the glucan when chitin was specifically removed either (i) by enzymic digestion with purified chitinase or (ii) by first deacetylating the chitin with alkali followed by depolymerization of the deacetylated chitin with nitrous acid. After depolymerization of the chitin, two types of β-glucans could be isolated: one was water-soluble and highly branched, the other was alkali-soluble with branches only one glucose unit long. Lysine (50%) and citrulline (20%) were the major amino acids in the R-glucan/chitin complex. By digesting 90% of the β-glucan in the R-glucan/chitin complex with (1→3)-β-glucanase, a residue was obtained which, on hydrolysis with chitinase, yielded N-acetylglucosamine and a compound containing (N-acetyl)-glucosamine, lysine and/or citrulline. A model is proposed for the R-glucan/chitin complex in which amino acids, especially lysine and citrulline, are involved in the linkages between glucan and chitin.
Natural hybridisation and phylogenetic position of Saxifraga trabutiana (Saxifragaceae) inferred from ISSR markers and ITS sequences

Natural hybridisation between Saxifraga trabutiana and Saxifraga granulata, two species belonging to different series of sect. Saxifraga, is reported. The hybrid, S. ¥ sorianoi, is endemic to the high mountains of Sierra de Filabres (Spain). The high morphological variation of S. granulata makes it diffi cult to differentiate all individual variants of this species from true hybrids found in sympatric populations. To test the hypothesis of the hybrid origin of S. ¥ sorianoi, we have used parental-specifi c molecular markers, obtained by ISSR (Inter-Simple Sequence Repeat) analysis and restriction of ITS (Internal Transcribed Spacer) sequences. In agreement with that hypothesis, marker profi les showed strong additivity according to its parental species. On the other hand, the ITS sequence of S. trabutiana was analysed along with those from other species of sect. Saxifraga to determine its relative position within this complex group. Saxifraga trabutiana clustered with S. erioblasta and S. rigoi, all of them classifi ed into series Gemmiferae. Conversely, other taxa of the same series such as S. globulifera, which is morphologically very similar to S. trabutiana, are scattered over different clusters. This is in line with what has been described for other plants of sect. Saxifraga. Discrepancies between molecular phylogeny and the relationships inferred from morphological data are discussed in a general context of reticulation within sect. Saxifraga.
Impact of air-sea exchange coefficients on the structure and intensity of tropical cyclones

To examine the impact of air-sea exchange coefficients on the structure and intensity of tropical cyclones, sensitivity experiments are performed using the Weather Research and Forecasting (WRF) Model. A typhoon-like idealized vortex embedded in a calm environment is simulated using combinations of three different values of airsea momentum and enthalpy exchange coefficients. In order to investigate the clear roles of each exchange coefficient, the experiments are designed that the two exchange coefficients change independently. For example, while the enthalpy exchange coefficient varies, the momentum exchange coefficient keeps its original value and vice versa. The track and intensity of sensitivity tests are analyzed to check the validity of the experiments. Results show that the track of the idealized vortices under a calm environment remains stationary, while the intensity varies with different air-sea exchange coefficients. The results indicate that changes in storm intensity with different enthalpy exchange coefficients are mainly related to an alteration in the amount of energy input to the storm, whereas the intensity changes with different momentum exchange coefficient values mostly result from angular momentum conservation due to changes in the size of the vortex. There is little change in the net energy input to the storms when the values of the momentum exchange coefficient are changed. Calculations of the volume-integrated angular momentum at the radius of the maximum winds confirm the different intensifying mechanisms found in this study. Article history: Received 11 November 2015 Revised 24 August 2016 Accepted 16 November 2016
What factors influence horse distribution patterns on Sable Island

Sable Island is a long, narrow sandbar off the coast of Nova Scotia, Canada. Despite its small size the island has been home to a population of feral horses (Equus ferus caballus L.) since the early 1800s. These horses are a valuable study population as they are isolated by law from human interference, and manage to survive in a confined space with limited resources. This study investigates their movement patterns, specifically whether social status and seasonal changes may be influencing variation in movement and distribution among individuals. It was predicted that stallions male horses that are the designated ‘leader’ of a band should have smaller ranges than bachelor horses because their movement may be restricted by their close associations to mares. It was also predicted that range distances would be greater in winter than in summer due to the high winds and limited grazing options on the island during winter. These questions were examined using GPS (global positioning system) data representing the locations of a subset of the horses over a three year period (2008-2010). The results suggest that seasonal changes substantially affect the average position of stallions on Sable Island, likely due to differential resource and shelter availability across the island in different seasons. The data also showed that range was most heavily influenced by individual identity, which indicates that different horses have different range tendencies regardless of their social status or the time of year. However, not all of the variation in distribution and movement of the horses could be attributed to the variables investigated in this study. Further research into other factors and the resource distribution on the island will provide a clearer picture into the dynamics at play within this population.
Adaptación y Validación de la Versión Española de la Escala de Conductas Negativas en el Trabajo Realizadas por Acosadores: NAQ-Perpetrators Adaptation and Validation of a Spanish Version of the Negative Acts Questionnaire at Work Showed by Bulliers: NAQ-Perpetrators

Most studies on workplace bullying have been focused on victims and their perceptions. Recently, a few number of studies have directly evaluated perpetrators, unfortunately, without a validated questionnaire. Based on the NAQ-RE (Moreno-Jimenez et al., 2007), this article reports a study on a Spanish adaptation and validation of a negative acts questionnaire focused on perpetrators (NAQ-P). Using a sample of 521 employees from 20 organizations of different sectors across Spain, data about victimization, perpetration, and transformational leadership, gender and occupational status were collected. The results showed that a model of two factors (person-related -3 items-, and work-related -4 itemsworkplace bullying perpetration) showed the best fit in comparison to the other tested models. Moreover, the results showed the questionnaire has good internal consistency and construct and discriminant validity.
Study on the Adsorption Isotherms of Chromium (VI) by Means of Carbon Nano Tubes from Aqueous Solutions

Background: The presence of heavy metals in the environment especially in water supplies have caused many concerns because of their toxicity and non-degradability. Hexavalent Chromium (Cr) is one of the most toxic metals which is used in many industries, so it is essential to remove it from industrial wastewater. In this study, we made a comparison between different adsorption isotherms in the chromium (VI) removal process using carbon nano tubes from aqueous solutions.Methods: This experimental study used atomic absorption spectrophotometry. To determine the adsorption isotherms, a synthetic sample with defined concentration of Cr (VI) was prepared and different doses of adsorbent were added to it. The effect of initial Cr concentration, pH, adsorbent dose, and reaction time on removal of Cr was investigated. Temperature and mix rate were steady during a defined time. At the end, Cr (VI) concentration measured and adsorbents equality capacities were calculated via formulas and graphs. Data analysis were performed using descriptive statistics.Results: Adsorption capacities (qe) increased with increasing of initial Cr concentration, and reaction time decreased with increasing adsorbent dose and pH. Correlation coefficients for Langmuir, and Freundlich isotherms in oxidized Multi-Walled Carbon Nano Tubes (MWCNTs) were 0.93, 0.874, and 0.714 and in oxidized Single-Walled Carbon Nano Tubes (SWCNTs) were 0.904, 0.868, and 0.711 respectively.Conclusion: Chromium ions adsorption in carbon nano tubes is accordant to Langmuir isotherm model, and MWCNTs have more cc than SWCNTs. Carbon nano tubes are effective adsorbents in removal of Cr (VI) from aqueous solutions.
The well-being of flemish primary school principals

The goal of this inquiry is to indicate which individual, organisational and external environment factors contribute to a better understanding of the well-being of Flemish primary school principals. The quantitative and qualitative outcomes suggest that well-being is a complex psychological phenomenon affected by a myriad of factors. The analyses indicate that general self-efficacy and achievement orientedness are significantly correlated with several aspects of positive (i. e. job satisfaction and job enthusiasm) and negative well-being (i.e. cynicism and personal accomplishment). With respect to school culture and structural characteristics, very weak almost negligible effects are noted. In addition, the analysis demonstrates the significant role school boards fulfill in explaining both positive and negative well-being. Finally, the role of central government in generally is found to affect well-being in a negative way. Data from a representative sample of primary schools in Flanders (N=46) were gathered through questionnaires (principals and teachers) and semi-structured interviews (principals). The findings of this paper provide important information for policy makers concerned with the improvement of the well-being of primary school principals. Although prior research investigated the influence of different antecedents on well-being, several limitations in method and conceptual framework yielded information of which the usefulness must be considered tentative (Ross, 1999). In this inquiry an attempt is made to overcome these limitations and contribute to the literature in a double way: (1) This study adopts a concurrent mixed method approach of data collection; (2) Well-being is examined from a positive psychology (job enthusiasm and job satisfaction) and negative psychology approach (burnout), whereas prior research almost exclusively looked at the negative pole of well-being.
Electron-cylotron maser radiation from electron holes: upward current region

Abstract. Electron holes are suggested to be an important source for generation of electron-cyclotron maser radiation. We demonstrate that electron holes generated in a ring-horseshoe distribution in the auroral-kilometric radiation source region have the capacity to emit band-limited radiation. The radiation is calculated in the proper frame of a circular model hole and shown to be strictly perpendicular in this frame. Its bandwidth under auroral conditions is of the order of ~1 kHz, which is a reasonable value. It is also shown that much of the drift of fine structure in the radiation can be interpreted as Doppler shift. Estimates based on data are in good agreement with theory. Growth and absorption rates have been obtained for the emitted radiation. However, the growth rate of a single hole obtained under conservative conditions is small, too small for reproducing the observed fine structure flux. Trapping of radiation inside the hole for the hole's lifetime helps amplifying the radiation additionally but introduces other problems. This entire set of questions is discussed at length and compared to radiation from the global horseshoe distribution. The interior of the hole produces a weak absorption at slightly higher frequency than emission. The absorptivity is roughly two orders of magnitude below the growth rate of the radiation thus being weak even when the emission and absorption bands overlap. Transforming to the stationary observer's frame it is found that the radiation becomes oblique against the magnetic field. For approaching holes the radiated frequencies may even exceed the local electron cyclotron frequency.