Vibrations of closed-shell Lennard-Jones icosahedral and cuboctahedral clusters and their effect on the cluster ground state energy

Vibrational spectra of closed shell Lennard-Jones icosahedral and cuboctahedral clusters are calculated for shell numbers between 2 and 9. Evolution of the vibrational density of states with the cluster shell number is examined and differences between icosahedral and cuboctahedral clusters described. This enabled a quantum calculation of quantum ground state energies of the clusters in the quasiharmonic approximation and a comparison of the differences between the two types of clusters. It is demonstrated that in the quantum treatment, the closed shell icosahedral clusters binding energies differ from those of cuboctahedral clusters more than is the case in classical treatment

A critical appreciation of intangible resources in PharmaNutrition

Background: Organizations in knowledge-intensive industries such as the field of PharmaNutrition benefit from a critical consideration of intangible resources for innovation performance and competitive advantage. Effective management of these resources, however, is complicated due to difficulties in their identification, appropriation, application, and evaluation. As a consequence, knowledge-intensive organizations are at risk of suboptimal exploitation of their most important value drivers. Methods: The literature on organizational intangible resources was reviewed as part of an ongoing investigation into effective management of intangible resources in the PharmaNutrition-specific context. Results: Although high-level dimensions of intangible resources are recognized across industries, the identity and relevance of various lower-level components are heterogenous and dependent on organization's unique situational attributes. Despite the existence of historical, industry-sourced tick-the-box lists presented here, an analysis of industry-specific characteristics of intangible resources and mechanisms to appropriate their value is warranted to enable practitioners to innovate effectively and efficiently. Conclusions: This editorial aims to put the topics of intangible resources and their appropriability on the agenda, and invites scholars and practitioners to contribute to the advancement of our understanding regarding these topics through an online survey

Juvenile vervet monkeys rely on others when responding to danger

Funding: Open access funding provided by University of Lausanne. Funding was provided by FP7 Ideas: European Research Council, 283871, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, 310030_143359, PP00P3_170624, Branco Weiss Fellowship-Society in Science.Primate alarm calls are mainly hardwired but individuals need to adapt their calling behaviours according to the situation. Such learning necessitates recognising locally relevant dangers and may take place via their own experience or by observing others. To investigate monkeys alarm calling behaviour, we carried out a field experiment in which we exposed juvenile vervet monkeys to unfamiliar raptor models in the presence of audiences that differed in experience and reliability. We used audience age as a proxy for experience and relatedness as a proxy for reliability, while quantifying audience reactions to the models. We found a negative correlation between alarm call production and callers’ age. Adults never alarm called, compared to juveniles. We found no overall effect of audience composition and size, with juveniles calling more when with siblings than mothers or unrelated individuals. Finally, concerning audience reactions to the models, we observed juveniles remained silent with vigilant mothers and only alarm called with ignoring mothers, whereas we observed the opposite for siblings: juveniles remained silent with ignoring siblings and called with vigilant siblings. Despite the small sample size, juvenile vervet monkeys, confronted with unfamiliar and potentially dangerous raptors, seem to rely on others to decide whether to alarm call, demonstrating that the choice of the model may play an important key role in the ontogeny of primate alarm call behaviour.Publisher PDFPeer reviewe

Changes in pain knowledge, attitudes and beliefs of osteopathy students after completing a clinically focused pain education module.

Background: Chronic pain is a substantial burden on the Australian healthcare system with an estimated 19.2% of Australians experiencing chronic pain. Knowledge of the neurophysiology and multidimensional aspects of pain is imperative to ensure health professionals apply a biopsychosocial approach to pain. Questionnaires may be used to assess learner changes in neurophysiology knowledge and beliefs and attitudes towards pain after education interventions.The aim of this study was to evaluate changes in pain neurophysiology knowledge, beliefs and attitudes following a 12 week clinically-focused pain module in year 3 osteopathy students as measured by the Neurophysiology of Pain (NPQ) Questionnaire and Health Care Providers Pain and Impairment Relationship scale (HC-PAIRS). Methods: A pre-post design was utilised. Learners completed a demographic information survey pre-module, and completed the NPQ & HC-PAIRS prior to undertaking, and after completing, a twelve week clinically-focused pain module. Results: Learners (n = 55) completed the NPQ & HC-PAIRS at both time points. The median NPQ score was significantly increased with a large effect size (p < 0.001, z = - 5.71, r = 0.78) following the completion of the module. In contrast, the HC-PAIRS total score was significantly increased after the completion of the module (p < 0.01, z = - 6.95, r = 0.91) suggesting an increase in negative pain attitudes and beliefs. Results indicate that a clinically-focused pain module can increase pain neurophysiology knowledge. However the HC-PAIRS results suggest an increase in negative pain attitudes and beliefs. The HC-PAIRS questionnaire was developed for use with chronic low back pain attitudes & beliefs in practitioners, rather than pre-clinical students. Students were provided with general principles of pain management, rather than condition specific pain management. This study is the first comparing pain neurophysiology knowledge and changes in attitudes and beliefs towards pain pre-post a clinically-focused pain module using the NPQ & HC-PAIRS. Conclusions: There was a significant improvement in NPQ score after the 12 week clinically-focused pain module. The HC-PAIRS result was paradoxical and may reflect issues with the module design or the measurement tool. The module duration is longer than that reported in the literature and demonstrates effectiveness in increasing pain neurophysiology knowledge

Entropic effects on the structure of Lennard-Jones clusters

We examine in detail the causes of the structural transitions that occur for those small Lennard-Jones clusters that have a non-icosahedral global minima. Based on the principles learned from these examples we develop a method to construct structural phase diagrams that show in a coarse-grained manner how the equilibrium structure of large clusters depends on both size and temperature. The method can be augmented to account for anharmonicity and quantum effects. Our results illustrate that the vibrational entropy can play a crucial role in determining the equilibrium structure of a cluster.Comment: 13 pages, 9 figure

Toshisada Nishida (1941–2011): Chimpanzee Rapport

Frans de Waal pays tribute to pioneering primatologist Toshisada Nishida, who transformed our understanding of chimpanzee behavior and culture and galvanized efforts to ensure their conservation

Changes in pain knowledge, attitudes and beliefs of osteopathy students after completing a clinically focused pain education module

Abstract Background Chronic pain is a substantial burden on the Australian healthcare system with an estimated 19.2% of Australians experiencing chronic pain. Knowledge of the neurophysiology and multidimensional aspects of pain is imperative to ensure health professionals apply a biopsychosocial approach to pain. Questionnaires may be used to assess learner changes in neurophysiology knowledge and beliefs and attitudes towards pain after education interventions. The aim of this study was to evaluate changes in pain neurophysiology knowledge, beliefs and attitudes following a 12 week clinically-focused pain module in year 3 osteopathy students as measured by the Neurophysiology of Pain (NPQ) Questionnaire and Health Care Providers Pain and Impairment Relationship scale (HC-PAIRS). Methods A pre-post design was utilised. Learners completed a demographic information survey pre-module, and completed the NPQ & HC-PAIRS prior to undertaking, and after completing, a twelve week clinically-focused pain module. Results Learners (n = 55) completed the NPQ & HC-PAIRS at both time points. The median NPQ score was significantly increased with a large effect size (p < 0.001, z = − 5.71, r = 0.78) following the completion of the module. In contrast, the HC-PAIRS total score was significantly increased after the completion of the module (p < 0.01, z = − 6.95, r = 0.91) suggesting an increase in negative pain attitudes and beliefs. Results indicate that a clinically-focused pain module can increase pain neurophysiology knowledge. However the HC-PAIRS results suggest an increase in negative pain attitudes and beliefs. The HC-PAIRS questionnaire was developed for use with chronic low back pain attitudes & beliefs in practitioners, rather than pre-clinical students. Students were provided with general principles of pain management, rather than condition specific pain management. This study is the first comparing pain neurophysiology knowledge and changes in attitudes and beliefs towards pain pre-post a clinically-focused pain module using the NPQ & HC-PAIRS. Conclusions There was a significant improvement in NPQ score after the 12 week clinically-focused pain module. The HC-PAIRS result was paradoxical and may reflect issues with the module design or the measurement tool. The module duration is longer than that reported in the literature and demonstrates effectiveness in increasing pain neurophysiology knowledge