1,562 research outputs found
Looking for a simple Big Five factorial structure in the domain of adjectives.
The Big Five factors structure is currently the benchmark for personality dimensions. In the domain of adjectives, various instruments have been developed to measure the Big Five. In this contribution the authors propose a methodology to find a simple factorial structure and apply this methodology to the domain of Big Five as measured by adjectives. Using data collected on a sample of 337 Ss (mean age 21.69 yrs), a five-factor benchmark structure is proposed derived from the 50 best marker adjectives selected among the adjectives contained in three instruments specifically developed to measure the Big Five (i.e., L. R. Goldberg's 100 adjectives list, IASR-B5, and SACBIF (1992)). They use this common factor structure (or benchmark structure) to investigate the differences and the similarities between the three operationalizations of the Big Five, and to investigate the placements of the full set of adjectives contained in the three instruments. The main features of the proposed methodology and the generalizability of the obtained results are discussed
Phase coherence in quasicondensate experiments: an ab initio analysis via the stochastic Gross-Pitaevskii equation
We perform an ab initio analysis of the temperature dependence of the phase
coherence length of finite temperature, quasi-one-dimensional Bose gases
measured in the experiments of Richard et al. (Phys. Rev. Lett. 91, 010405
(2003)) and Hugbart et al. (Eur. Phys. J. D 35, 155-163 (2005)), finding very
good agreement across the entire observed temperature range
(). Our analysis is based on the one-dimensional stochastic
Gross-Pitaevskii equation, modified to self-consistently account for
transverse, quasi-one-dimensional effects, thus making it a valid model in the
regime . We also numerically implement an
alternative identification of , based on direct analysis of the
distribution of phases in a stochastic treatment.Comment: Amended manuscript with improved agreement to experiment, following
some additional clarifications by Mathilde Hugbart and Fabrice Gerbier and
useful comments by the reviewer; accepted for publication in Physical Review
Quantitative study of quasi-one-dimensional Bose gas experiments via the stochastic Gross-Pitaevskii equation
The stochastic Gross-Pitaevskii equation is shown to be an excellent model
for quasi-one-dimensional Bose gas experiments, accurately reproducing the in
situ density profiles recently obtained in the experiments of Trebbia et al.
[Phys. Rev. Lett. 97, 250403 (2006)] and van Amerongen et al. [Phys. Rev. Lett.
100, 090402 (2008)], and the density fluctuation data reported by Armijo et al.
[Phys. Rev. Lett. 105, 230402 (2010)]. To facilitate such agreement, we propose
and implement a quasi-one-dimensional stochastic equation for the low-energy,
axial modes, while atoms in excited transverse modes are treated as independent
ideal Bose gases.Comment: 10 pages, 5 figures; updated figures with experimental dat
A low-temperature phase of bis(tetrabutylammonium) octa-l3-chloridohexachlorido- octahedro-hexatungstate
The article discusses the low-temperature phase of bis(tetrabutylammonium) octa-µ3-chlorido-hexachlorido-octahedro-hexa-tungstate, which undergoes a reversible phase transition at 268 K. The unit cells of the room- and low-temperature polymorphs of this compound are found to be closely related. The hydrocarbon chain of one of the tetrabutylammonium cations is found to be disordered at both 150 and 200 K
Rainbow trout (Oncorhynchus mykiss, Walbaum 1792) develop a more robust body shape under organic rearing
Prolonged exposure to captive conditions has led to the development of a rainbow trout ‘farmed’ pheno- type, which is different from that of wild trout. Selec- tion for desirable productive traits in hatcheries has resulted in the development of some morphological traits that are maladaptive in nature. The recent development of organic aquaculture, guided by the well-being of the fish, could potentially produce a new farmed phenotype that would be more adaptive in nature. In this study, rainbow trout reared in intensive and organic farms were compared by means of shape analysis, to detect patterns of shape variation associated with rearing environment. The results of this study highlight a significant effect of the rearing method on rainbow trout shape: organi- cally reared trout showed a higher body profile, in particular in the head and trunk regions, shorter median fins and a deeper caudal peduncle. A combined effect of density and habitat complexity could have contributed to the observed shape differences: in organic rearing systems, lower densi- ties and steady water could increase territoriality and aggressive interactions, promoting body designs more functional in rapid attacks and escapes
Characterization of biochars produced from pyrolysis of pelletized agricultural residues
Biochars produced from pelletized grape vine (GV) and sunflower husk (SFH) agricultural residues were studied by pyrolysis in a batch reactor at 400 and 500°C. Chemical and physical evolution of the biomass under pyrolysis conditions was determined and the products were characterized, including the main gaseous organic components. . Results showed a decrease in solid biochar yield with increasing temperature. Biochar is defined as a "porous carbonaceous solid" produced by thermochemical conversion of organic materials in an oxygen depleted atmosphere, which has physiochemical properties suitable for the safe and long-term storage of carbon in the environment and, potentially, soil improvement. The aim of this work is to improve the knowledge and acceptability of alternative use of the biochar gained from agro-forestry biomass residuals, such as grape vine and sunflower husks, by means of modern chemical and physical characterization tools
Genetic homogeneity in the deep-sea grenadier Macrourus berglax across the North Atlantic Ocean
Paucity of data on population structure and connectivity in deep sea species remains a major obstacle to their sustainable management and conservation in the face of ever increasing fisheries pressure and other forms of impacts on deep sea ecosystems. The roughhead grenadier Macrourus berglax presents all the classical characteristics of a deep sea species, such as slow growth and low fecundity, which make them particularly vulnerable to anthropogenic impact, due to their low resilience to change. In this study, the population structure of the roughhead grenadier is investigated throughout its geographic distribution using two sets of molecular markers: a partial sequence of the Control Region of mitochondrial DNA and species-specific microsatellites. No evidence of significant structure was found throughout the North Atlantic, with both sets of molecular markers yielding the same results of overall homogeneity. We posit two non-mutually exclusive scenarios that can explain such outcome: i) substantial high gene flow among locations, possibly maintained by larval stages, ii) very large effective size of post-glacially expanded populations. The results can inform management strategies in this by-caught species, and contribute to the broader issue of biological connectivity in the deep ocean
Stressed Fracture: The Relationship Between Coping Strategies and Workload in Secondary School Athletic Trainers
Purpose: The work environment for an athletic trainer (AT) working in a secondary school is typified by heavy workloads and job-related stress. Occupational stress can have negative effects on productivity, absenteeism, employee turnover, and quality of life. Research suggests that personal and situational factors can influence the coping process adopted by an individual. The approach-avoidance framework suggests that people cope with a stressor by either attempting to reduce it or removing oneself from that stressor. Previous research on other healthcare professionals suggested that use of avoidance coping was correlated with higher levels of job stress and those who perceived greater social support possessed lower work-related stress. However, the relationship between coping strategies and perceived social support has not been examined in ATs. The purpose of this study was to examine the relationship among coping strategies, perceived social support, and workload in secondary school ATs. Method: This was a cross-sectional study completed via an online survey. Three hundred, ninety-two (392) secondary school athletic trainers (35.7 ± 11.1 years old) from all NATA districts responded to the survey. Outcomes included the Brief COPE, Multidimensional Scale of Perceived Social Support, and average hours worked. Results: The average workload reported was 44.10 ± 12.96 hours a week over the school year (i.e., fall and spring). The regression model showed that avoidant coping (B=0.34, 95% CI=0.12, 0.56, p=.005) was directly associated with the average number of hours worked (adjusted R2=.07). Approach coping (B=-0.28, 95% CI=-0.43, -0.12, p=.007) was indirectly associated with the average numbers of hours worked. However, perceived social support did not display a significant association with any variable of interest. Conclusions: Our findings suggest that a relationship between average workload and coping strategies adopted by secondary school ATs may exist. Increased workloads were related to increases in avoidance coping strategies. Further research in this area is needed to determine how coping strategies affect patient care
- …