Servant Leadership and its Relationships with Core Self-Evaluation and Job Satisfaction

Servant leadership is a growing topic in the leadership literature. Our study considered servant leadership’s relationship to two outcomes, core self-evaluation and job satisfaction. The former is particularly noteworthy because if servant leadership predicts core self-evaluation this would confirm that servant leadership affects important changes in employees as people, a central tenet of servant leadership. In addition, if servant leadership predicts core self-evaluation, this could add to the question of whether core self-evaluation is a non-changeable personality trait or is potentially malleable. We conducted a field study of three firms and found that servant leadership predicts both core self-evaluation and job satisfaction, and that core self-evaluation also predicts job satisfaction. This study contributes to servant leadership, and in general to values-based leadership, by observing a predictive relationship to core self-evaluation, which potentially adds new information about the impact servant leadership can have on individuals. This study confirms the findings of previous authors who found that servant leadership predicts job satisfaction

Topological conjugacy of locally free Rn−1{\bf R}^{n-1} actions on nn-manifolds

La scolarisation obligatoire imposée par la Troisième République s’est appuyée sur l’école communale jusqu’au début des années 1960. Depuis, la massification de l’enseignement secondaire et l’amplification de l’accès au baccalauréat ont reposé en partie sur la carte scolaire et la sectorisation qu’elle impose. Les lois de décentralisation et le développement de politiques prioritaires, « éducation prioritaire » et « politique de la ville » auraient pu conduire à une territorialisation des politiques scolaires. À l’observation, on constate que les contraintes et les préconisations qu’elles apportent ne touchent qu’une proportion réduite de la population. Les stratégies de contournement, d’évitement développées par les familles font qu’elles ne sont véritablement opposées qu’aux groupes les moins favorisés de la population, que les mesures de territorialisation mises en œuvre sont élaborées à l’extérieur des espaces considérés et que les territoires ainsi délimités sortent du droit commun : les populations résidentes sont considérées à part, la discrimination positive en faveur des établissements scolaires ne réduit pas la différenciation sociale négative.The compulsory schooling imposed by the “Troisième République” has had its own basis on local primary schools till the beginning of the sixties. Since then, the massiveness of secondary school and the widening of the access to the “baccalauréat” degree were partly supported by the system of spatial sectorisation or repartition called “carte scolaire”. Decentralisation laws and the development of priority politics, “priority schooling’’ and local politics could have led to a territorialisation of schooling politics. On the ground, one can observe that constraints and preconisations made these politics effect only a small proportion of the population. By-pass and avoidance strategies developed by families reveal that their effectiveness is only a matter for the least favoured groups but also that territorialisation rules are elaborated outside the concerned areas. What is more, territories thus delimited are beyond common law - its population is left aside and the affirmation action in favour of education does not reduce the negative social effects

Gene Loss and Horizontal Gene Transfer Contributed to the Genome Evolution of the Extreme Acidophile “Ferrovum”

Indexación: Web of Science. Scopus.Acid mine drainage (AMD), associated with active and abandoned mining sites, is a habitat for acidophilic microorganisms that gain energy from the oxidation of reduced sulfur compounds and ferrous iron and that thrive at pH below 4. Members of the recently proposed genus "Ferrovurn" are the first acidophilic iron oxidizers to be described within the Betaproteobacteria. Although they have been detected as typical community members in AMD habitats worldwide, knowledge of their phylogenetic and metabolic diversity is scarce. Genomics approaches appear to be most promising in addressing this lacuna since isolation and cultivation of "Ferrovurn" has proven to be extremely difficult and has so far only been successful for the designated type strain-Ferrovum myxofaciens" P3G. In this study, the genomes of two novel strains of "Ferrovurn" (PN-J185 and Z-31) derived from water samples of a mine water treatment plant were sequenced. These genomes were compared with those of "Ferrovum" sp. JA12 that also originated from the mine water treatment plant, and of the type strain (P3G). Phylogenomic scrutiny suggests that the four strains represent three "Ferrovum" species that cluster in two groups (1 and 2). Comprehensive analysis of their predicted metabolic pathways revealed that these groups harbor characteristic metabolic profiles, notably with respect to motility, chemotaxis, nitrogen metabolism, biofilm formation and their potential strategies to cope with the acidic environment. For example, while the "F myxofaciens" strains (group 1) appear to be motile and diazotrophic, the non-motile group 2 strains have the predicted potential to use a greater variety of fixed nitrogen sources. Furthermore, analysis of their genome synteny provides first insights into their genome evolution, suggesting that horizontal gene transfer and genome reduction in the group 2 strains by loss of genes encoding complete metabolic pathways or physiological features contributed to the observed diversification.http://journal.frontiersin.org/article/10.3389/fmicb.2016.00797/ful

Dynamical Belyi maps

We study the dynamical properties of a large class of rational maps with exactly three ramification points. By constructing families of such maps, we obtain infinitely many conservative maps of degree $d$; this answers a question of Silverman. Rather precise results on the reduction of these maps yield strong information on the rational dynamics.Comment: 21 page

Deformation localisation in ion-irradiated Fe and Fe10Cr

Determining the mechanisms for irradiation-induced ductility loss is crucial for the design of reactor structural components. Here, the deformation characteristics around nanoindents in Fe and Fe10Cr irradiated with Fe ions to ∼1 displacement-per-atom at 313 K are non-destructively studied. Slip steps surrounding the nanoindents indicate that deformation is localised in the irradiated materials. Lattice rotation and strain fields near the indent site show over 87% confinement of plasticity in the irradiated material. Cr has little effect on the irradiation-induced changes in pile-up topography and deformation fields, suggesting it has limited impact on retaining strain hardening capacity and reducing irradiation-induced embrittlement

Using Remotely-Sensed Estimates of Soil Moisture to Infer Soil Texture and Hydraulic Properties across a Semi-arid Watershed

Near-surface soil moisture is a critical component of land surface energy and water balance studies encompassing a wide range of disciplines. However, the processes of infiltration, runoff, and evapotranspiration in the vadose zone of the soil are not easy to quantify or predict because of the difficulty in accurately representing soil texture and hydraulic properties in land surface models. This study approaches the problem of parameterizing soils from a unique perspective based on components originally developed for operational estimation of soil moisture for mobility assessments. Estimates of near-surface soil moisture derived from passive (L-band) microwave remote sensing were acquired on six dates during the Monsoon '90 experiment in southeastern Arizona, and used to calibrate hydraulic properties in an offline land surface model and infer information on the soil conditions of the region. Specifically, a robust parameter estimation tool (PEST) was used to calibrate the Noah land surface model and run at very high spatial resolution across the Walnut Gulch Experimental Watershed. Errors in simulated versus observed soil moisture were minimized by adjusting the soil texture, which in turn controls the hydraulic properties through the use of pedotransfer functions. By estimating a continuous range of widely applicable soil properties such as sand, silt, and clay percentages rather than applying rigid soil texture classes, lookup tables, or large parameter sets as in previous studies, the physical accuracy and consistency of the resulting soils could then be assessed. In addition, the sensitivity of this calibration method to the number and timing of microwave retrievals is determined in relation to the temporal patterns in precipitation and soil drying. The resultant soil properties were applied to an extended time period demonstrating the improvement in simulated soil moisture over that using default or county-level soil parameters. The methodology is also applied to an independent case at Walnut Gulch using a new soil moisture product from active (C-band) radar imagery with much lower spatial and temporal resolution. Overall, results demonstrate the potential to gain physically meaningful soils information using simple parameter estimation with few but appropriately timed remote sensing retrievals

Simple inhibitors of histone deacetylase activity that combine features of short-chain fatty acid and hydroxamic acid inhibitors

Butyric acid and trichostatin A (TSA) are anti-cancer compounds that cause the upregulation of genes involved in differentiation and cell cycle regulation by inhibiting histone deacetylase (HDAC) activity. In this study we have synthesized and evaluated compounds that combine the bioavailability of short-chain fatty acids, like butyric acid, with the bidentate binding ability of TSA. A series of analogs were made to examine the effects of chain length, simple aromatic cap groups, and substituted hydroxamates on the compounds\u27 ability to inhibit rat-liver HDAC using a fluorometric assay. In keeping with previous structure-activity relationships, the most effective inhibitors consisted of longer chains and hydroxamic acid groups. It was found that 5-phenylvaleric hydroxamic acid and 4-benzoylbutyric hydroxamic acid were the most potent inhibitors with IC50\u27s of 5 microM and 133 microM respectively