Jarik Nešetřil suggested to the first author the investigation of notions of homogeneity for relational structures, where “isomorphism” is replaced by “homomorphism” in the definition. Here we look in detail at what happens for posets. For the strict order, all five generalisations of homogeneity coincide, and we give a characterisation of the countable structures that arise. For the non-strict...

Many medical studies are carried out to investigate the size of some effect, for example the treatment effect in a controlled clinical trial or the risk of exposure to some substance in an observational study. To this end it is usual to compare groups of subjects, such as those receiving active treatment with those getting placebo or those exposed with those not exposed. The comparison is often...

V. Parpura and P.G. Haydon (eds.), Astrocytes in (Patho)Physiology of the Nervous System, 1 DOI: 10.1007/978-0-387-79492-1_1, © Springer Science + Business Media, LLC 2009 The history of the morphology and electrophysiology of the neuroglia , which was the historical term used for what are now termed astroglia or astrocytes, is briefly reviewed. The interpretation of these data around 1970 was ...

The statistical NLP and IR literatures tend to make a “homogeneity assumption” about the distribution of terms, either by adopting a “bag of words” model, or in their treatment of function words. In this paper we develop a notion of homogeneity detection to a level of statistical significance, and conduct a series of experiments on different datasets, to show that the homogeneity assumption doe...

Background: The variation in collimator angles the Volumetric Modulated Arc Therapy (VMAT) has been a factor of consideration modern radiotherapy techniques for treatment cancer. Aim: To investigate dose-volume evaluation planning target volume (PTV) and organs-at-risk (OARs) prostate carcinoma patients planned with 1.5 arcs different angles. Methods: angle plays vital role VMAT due to leakage ...

A method is described by which liquid isoelectric focusing over a pH range 5 to 8 has been used on a preparative scale for the further purification of specifically purified antibodies directed against the positively charged p-azophenyltrimethylammonium hapten (anti-Ap antibodies). The anti-Ap antibodies separated into 4 to 8 major fractions and 10 to 16 minor fractions. More than 95% of the ant...

BACKGROUND Adult weight is positively associated with postmenopausal breast cancer but few studies have investigated whether there are associations with weight and body mass index (BMI) in early adulthood, or subsequent weight change. METHODS A total of 14,441 postmenopausal women from the Melbourne Collaborative Cohort Study (MCCS) were followed for 16.5 years (mean) and 668 incident breast ...

Introduction: Radiation therapy following breast conserving surgery is one of the most common procedures performed in any radiation oncology department. A tangential parallel-opposed pair is almost always the technique of choice for this purpose. This technique is often performed based on 3D treatment planning. The aim of this study was to compare 3D treatment planning for two different energie...