4 research outputs found
Bounded Fatou and Julia components of meromorphic functions
We completely characterise the bounded sets that arise as components of the
Fatou and Julia sets of meromorphic functions. On the one hand, we prove that a
bounded domain is a Fatou component of some meromorphic function if and only if
it is regular. On the other hand, we prove that a planar continuum is a Julia
component of some meromorphic function if and only if it has empty interior. We
do so by constructing meromorphic functions with wandering continua using
approximation theory.Comment: 15 pages, 4 figures. V2: We have revised the introduction, and
introduced two new sections: Section 2 discusses and compare topological
properties of Fatou components, while Section 3 establishes that certain
bounded regular domains cannot arise as eventually periodic Fatou components
of meromorphic function
Emotion in language and speech:methodological issues in the coding of natural data
Researchers currently seek to improve validity in speech and language studies by adopting naturalistic procedures In emotion-display research, validity is threatened by standard experimental controls which diminish the naturalism of stimuli and responseranges. Were port two experiments comparing the adequacy of naturalistic with standard procedures. Experiment 1 had 158 judges code 89 samples of naturally-occurring emotional speech with free- choice emotion labels, and later with labels from a standard set. When free-choice labels were similar across judges, they were consistent with standard labels, but showed a range of intensity and contextual relevance. We recommend that future studies include wider options for judges when coding emotions. Experiment 2 compared valency ratings of words when presented in, or out of, context. Standard procedures score lexical valencies using affective dictionaries, disregarding natural contexts. Experiment 2 compared 23 judges' valency ratings of words presented individually, and later in their original context. Between 30% and 44% of words were rated differently in context (depending on the statistical significance level adopted). We concluded from Experiment 2 that, where small corpora adequately model a domain, the improved accuracy of valency rating achieved by presenting words in their natural context justifies the extra procedures required
Gambling: 'A Respectable Hell'? Has the Internet Made a Traditional Pastime Too Accessible Bringing With it Inevitable Problems?
Interactions between negative energy balance, metabolic diseases, uterine health and immune response in transition dairy cows
The biological cycles of milk production and reproduction determine dairying profitability
thus making management decisions dynamic and time-dependent. Diseases also negatively
impact on net earnings of a dairy enterprise. Transition cows in particular face the challenge
of negative energy balance (NEB) and/or disproportional energy metabolism (fatty
liver, ketosis, subacute, acute ruminal acidosis); disturbed mineral utilization (milk fever,
sub-clinical hypocalcemia); and perturbed immune function (retained placenta, metritis,
mastitis). Consequently NEB and reduced dry matter intake are aggravated. The combined
effects of all these challenges are reduced fertility and milk production resulting in diminishing
profits. Risk factors such as NEB, inflammation and impairment of the immune
response are highly cause-and-effect related. Thus, managing cows during the transition
period should be geared toward reducing NEB or feeding specially formulated diets to
improve immunity. Given that all cows experience a reduced feed intake and body condition,
infection and inflammation of the uterus after calving, there is a need for further
research on the immunology of transition dairy cows. Integrative approaches at the molecular,
cellular and animal level may unravel the complex interactions between disturbed
metabolism and immune function that predispose cows to periparturient diseases.Institute of Food, Nutrition and Wellbeing (IFNuW) from the University of Pretoria, South Africa.http://www.elsevier.com/locate/anireproscihb2014ab201