1,915 research outputs found
Outdoor Leader Self Awareness and Its Relationship to Co-Leaders\u27 Perceptions of Influence
The purpose of this study was to exÂamine the relationship between outdoor leader self-awareness and co-leaders\u27 perÂceptions of leader influence. SelfÂ-awareness was based on the concept of self-actualization (Maslow, 1968, 1970, 1971). The construct of influence was operationalized as power (French & RaÂven, 1959)
The Stability of novel energetic materials and associated propellants
A study into the degradation of crystalline Hydrazinium Nitroformate (HNF) in isolation has been
carried out alongside studies into HNF / polyNIMMO propellant degradation. The contribution of
gas / solid autocatalysis in the degradation of the crystalline phase has been determined to be very
low. Studies via GC-MS analysis do suggest that the presence (and eventual release) of the
crystal impurity, isopropyl alcohol, is a more significant contributor to the eventual autocatalytic
breakdown of the crystal matrix. Investigations into the chemical compatibility of HNF with
nitrosated and nitrated derivatives of 2NDPA and pNMA indicated that the reaction of HNF is
most rapid with N-NO-2NDPA. This reaction between HNF and N-NO-2NDPA is proposed to be
the principal route to rapid propellant degradation in 2NDPA stabilised propellant systems.
Analysis of a range of polyNIMMO / HNF propellants has allowed development of a hypothesis
for this family of propellant compositions over a range of temperatures. The data has indicated
that the degradation of polyNIMMO / HNF propellants is a complex process involving a number
of interrelated and interdependent reactions. It appears that a significantly different reaction
scheme dominates at 80°C compared to either 60°C or 40°C.
The incorporation of a 1% anhydrous sodium sulphite + 1% pNMA mixed stabiliser system has
shown promise for use in propellant formulations up to temperature of 80°C. Some level of
success in stabilisation has also been achieved using very high levels of pNMA within the
propellant formulation
Sports psychology in the English Premier League: âIt feels precarious and is precariousâ
This is the author accepted manuscript. The final version is available from SAGE Publications via the DOI in this record.This article gives a rare account of the working life of a sports psychologist in the
English Premier League (EPL), the elite division in English professional football. It
shows how members of emerging professions such as sports psychology are a new
precariat. Martin is more successful than many sports psychologists, but his job
security is dependent on his continued ability to navigate managerial change: using
his skills as a psychologist in the defence of his own employment but simultaneously
keeping the (potentially sensitive) âpsychologyâ label of the work he does hidden until
circumstances are propitious
Enhancing memory with the liverpool interview protocol: Is an association with hypnosis a problem?
The Liverpool Interview Protocol (LIP) is a brief memory facilitation procedure designed for use in forensic investigative interviews. However, as the LIP techniques were derived from hypnotic investigative interviewing techniques, concern has been expressed by some senior police officers about a possible negative association with hypnosis. The aim of the present study was to address this concern by investigating not only the accuracy of the LIP in facilitating memory but whether witnesses receiving the LIP judged themselves, and observers judged the witnesses, to be hypnotized using the Long Stanford Scale of Hypnotic Depth. The results showed that the LIP increased correct memory for details of a crime incident, without increasing errors or inflating confidence, whilst being no more associated by witnesses or observers with the label of 'hypnosis' than a standard interview or a rapport condition. It is concluded that a negative association with hypnosis does not appear to be a particular issue with the LIP. It is also noted that the Cognitive Interview has yet to receive similar scrutiny. © 2014 British Society of Clinical and Academic Hypnosis Published by Crown House Publishing Ltd
Exploratory Analysis of Highly Heterogeneous Document Collections
We present an effective multifaceted system for exploratory analysis of
highly heterogeneous document collections. Our system is based on intelligently
tagging individual documents in a purely automated fashion and exploiting these
tags in a powerful faceted browsing framework. Tagging strategies employed
include both unsupervised and supervised approaches based on machine learning
and natural language processing. As one of our key tagging strategies, we
introduce the KERA algorithm (Keyword Extraction for Reports and Articles).
KERA extracts topic-representative terms from individual documents in a purely
unsupervised fashion and is revealed to be significantly more effective than
state-of-the-art methods. Finally, we evaluate our system in its ability to
help users locate documents pertaining to military critical technologies buried
deep in a large heterogeneous sea of information.Comment: 9 pages; KDD 2013: 19th ACM SIGKDD Conference on Knowledge Discovery
and Data Minin
Edge ideals: algebraic and combinatorial properties
Let C be a clutter and let I(C) be its edge ideal. This is a survey paper on
the algebraic and combinatorial properties of R/I(C) and C, respectively. We
give a criterion to estimate the regularity of R/I(C) and apply this criterion
to give new proofs of some formulas for the regularity. If C is a clutter and
R/I(C) is sequentially Cohen-Macaulay, we present a formula for the regularity
of the ideal of vertex covers of C and give a formula for the projective
dimension of R/I(C). We also examine the associated primes of powers of edge
ideals, and show that for a graph with a leaf, these sets form an ascending
chain
Red Light Is Effective in Reducing Nitrate Concentration in Rocket by Increasing Nitrate Reductase Activity, and Contributes to Increased Total Glucosinolates Content
Rocket cultivation is increasing to supply the expanding ready-to-eat market because of its unique taste, but crops are often over fertilized to avoid nitrogen deficiencies. This leads to nitrate accumulation in leaves, and the products of their degradation (nitrites and nitrosamines) have been related to several health problems. Nitrate concentrations in rocket and other leafy vegetables are subject to limits by the EU legislation, yet rocket holds a great nutritional value. Degradation products of glucosinolates (isothiocyanates) have been consistently linked with benefits to human health. We investigated the influence of nitrogen application (1 and 8 mM), species [Eruca sativa (L.) Cav. and Diplotaxis tenuifolia (L.) DC.] and light spectrum (full spectrum, red, blue and red + blue) on the nitrate concentration, nitrate reductase activity and glucosinolate content of rocket grown in a soil-less system. Red light decreased the nitrate concentration with respect to the blue spectrum (4,270 vs. 7,100 mgâ
kgâ1 of fresh weight, respectively), but such reduction was influenced by the species and the nitrogen level (significantly higher in D. tenuifolia and with the higher concentration of N). The nitrate reductase activity increased under red light in D. tenuifolia, with the lower N concentration. Rocket is known to contain several health-promoting compounds mainly antioxidants and glucosinolates, as secondary metabolites that act as part of plant defense mechanisms. The total content of glucosinolates was mainly affected by the species (D. tenuifolia showed the highest concentrations). Our results will help growers to tailor light spectra with the aim of reducing nitrate concentration and to remain within EU legislative limits, without any detrimental influence on other qualitative parameters in rocket
Prolonged anxiety on habituation of the cold shock response
Variation in the cold shock response (CSR) can be explained by physiological factors, habituation; and possibly "psychological" influences. Acute anxiety on cold-water immersion (CWI) increases the magnitude of the CSR in unhabituated volunteers and eliminates the reduction in the response seen after habituation. Recently it was demonstrated that habituation of the CSR includes a significant perceptual component. When the threat of CWI scenario was reduced, anxiety associated with being immersed was also reduced. In contrast, prolonged anxiety during repeat CWIs may prevent habituation. Therefore, it was hypothesized that prolonged anxiety reduces the extent of CSR habituation
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