Primary language teacher education in Italy: refining syllabus design by listening to learners' voices.

Decisions concerning syllabus design are generally based on considerations linked with the level of competence which is to be attained by the end of the course itself. The Common European Framework of Reference is one of the many yardsticks against which language competence can be measured. However, the guidelines it provides may need further qualifications, especially when dealing with foreign-language primary school teaching. This paper sets out to examine how the opinions of a group of primary school teachers who have been trained to become English teachers can be exploited for the purpose of refining the design of the syllabus of further training courses

Polarized Diffuse Emission at 2.3 GHz in a High Galactic Latitude Area

Polarized diffuse emission observations at 2.3 GHz in a high Galactic latitude area are presented. The 2\degr X 2\degr field, centred in (\alpha=5^h,\delta=-49\degr), is located in the region observed by the BOOMERanG experiment. Our observations has been carried out with the Parkes Radio telescope and represent the highest frequency detection done to date in low emission areas. Because of a weaker Faraday rotation action, the high frequency allows an estimate of the Galactic synchrotron contamination of the Cosmic Microwave Background Polarization (CMBP) that is more reliable than that done at 1.4 GHz. We find that the angular power spectra of the E- and B-modes have slopes of \beta_E = -1.46 +/- 0.14 and \beta_B = -1.87 +/- 0.22, indicating a flattening with respect to 1.4 GHz. Extrapolated up to 32 GHz, the E-mode spectrum is about 3 orders of magnitude lower than that of the CMBP, allowing a clean detection even at this frequency. The best improvement concerns the B-mode, for which our single-dish observations provide the first estimate of the contamination on angular scales close to the CMBP peak (about 2 degrees). We find that the CMBP B-mode should be stronger than synchrotron contamination at 90 GHz for models with T/S > 0.01. This low level could move down to 60-70 GHz the optimal window for CMBP measures.Comment: 5 pages, 6 figures, accepted for publication in MNRAS Letter

Nitrogen transactions along the digestive tract of lambs concurrently infected with Trichostrongylus colubriformis and Ostertagia circumcincta

Twelve lambs, paired on the basis of live weight, were cannulated in the abomasum, in the proximal jejunum approximately 4 m distal to the pylorus and in the terminal ileum. Six were infected with 3000 Trichostrongylus colubriformis and 3000 Ostertagia circumcincta larvae each day for 18 weeks and the remainder were pair-fed to individual infected lambs. All animals were offered ryegrass (Lolium perenne)–white clover (Trifolium repens) pasture, cut daily. Dry matter (DM) intake, live weight, faecal egg concentration, plasma pepsinogen and plasma protein concentrations were measured weekly. During weeks 7 and 17 after commencement of infection, the flow of digesta along the gastrointestinal tract was measured together with enteric plasma loss and true digestion and absorption of ¹²⁵I-labelled albumin in the small intestine. DM intake was depressed by parasitism, being 1331, (se 70), 423 (se 32) and 529 (se 52) g/d during weeks 3, 7 and 17 respectively. The flow of nitrogen at the proximal jejunum and in faeces was increased by parasitism during week 7 and at the abomasum and ileum during week 17. Plasma protein-N loss (g/d) into the gastrointestinal tract was 0.68 (se 0.091) and 1.97 (se 0.139) during week 7, and 0.85 (se0.158) and 1.96 (se 0.396) during week 17, in control and infected sheep respectively. True digestion and absorption of albumin in the proximal small intestine, the site of infection, was very low (mean 0.08) and was not affected by parasitism. Between the abomasum and terminal ileum absorption of albumin was high (mean 0.87) and again was not affected by parasitism. It was calculated that of the total increase in endogenous protein passing from the ileum tract as a result of infection, plasma protein comprised only a small percentage (10–36%). The major proportion of digestion and absorption of protein occurred in the distal small intestine beyond the site of infection and was not affected by infection

A radio-polarisation and rotation measure study of the Gum Nebula and its environment

The Gum Nebula is 36 degree wide shell-like emission nebula at a distance of only 450 pc. It has been hypothesised to be an old supernova remnant, fossil HII region, wind-blown bubble, or combination of multiple objects. Here we investigate the magneto-ionic properties of the nebula using data from recent surveys: radio-continuum data from the NRAO VLA and S-band Parkes All Sky Surveys, and H-alpha data from the Southern H-Alpha Sky Survey Atlas. We model the upper part of the nebula as a spherical shell of ionised gas expanding into the ambient medium. We perform a maximum-likelihood Markov chain Monte-Carlo fit to the NVSS rotation measure data, using the H-halpha data to constrain average electron density in the shell $n_e$. Assuming a latitudinal background gradient in RM we find $n_e=1.3^{+0.4}_{-0.4} {\rm cm}^{-3}$, angular radius $\phi_{\rm outer}=22.7^{+0.1}_{-0.1} {\rm deg}$, shell thickness $dr=18.5^{+1.5}_{-1.4} {\rm pc}$, ambient magnetic field strength $B_0=3.9^{+4.9}_{-2.2} \mu{\rm G}$ and warm gas filling factor $f=0.3^{+0.3}_{-0.1}$. We constrain the local, small-scale (~260 pc) pitch-angle of the ordered Galactic magnetic field to $+7^{\circ}\lesssim\wp\lesssim+44^{\circ}$, which represents a significant deviation from the median field orientation on kiloparsec scales (~-7.2$^{\circ}$). The moderate compression factor X=6.0\,^{+5.1}_{-2.5} at the edge of the H-alpha shell implies that the 'old supernova remnant' origin is unlikely. Our results support a model of the nebula as a HII region around a wind-blown bubble. Analysis of depolarisation in 2.3 GHz S-PASS data is consistent with this hypothesis and our best-fitting values agree well with previous studies of interstellar bubbles.Comment: 33 pages, 16 figures. Accepted by The Astrophysical Journa

S-band Polarization All Sky Survey (S-PASS): survey description and maps

We present the S-Band Polarization All Sky Survey (S-PASS), a survey of polarized radio emission over the southern sky at Dec~$< -1^\circ$ taken with the Parkes radio telescope at 2.3~GHz. The main aim was to observe at a frequency high enough to avoid strong depolarization at intermediate Galactic latitudes (still present at 1.4 GHz) to study Galactic magnetism, but low enough to retain ample Signal-to-Noise ratio (S/N) at high latitudes for extragalactic and cosmological science. We developed a new scanning strategy based on long azimuth scans, and a corresponding map-making procedure to make recovery of the overall mean signal of Stokes $Q$ and $U$ possible, a long-standing problem with polarization observations. We describe the scanning strategy, map-making procedure, and validation tests. The overall mean signal is recovered with a precision better than 0.5\%. The maps have a mean sensitivity of 0.81 mK on beam--size scales and show clear polarized signals, typically to within a few degrees of the Galactic plane, with ample S/N everywhere (the typical signal in low emission regions is 13 mK, and 98.6\% of the pixels have S/N $> 3$). The largest depolarization areas are in the inner Galaxy, associated with the Sagittarius Arm. We have also computed a Rotation Measure map combining S-PASS with archival data from the WMAP and Planck experiments. A Stokes $I$ map has been generated, with a sensitivity limited to the confusion level of 9 mK.Comment: Accepted for publication on MNRAS. Maps are available for download at the website indicated in the manuscrip

Defining the allometric relationship between size and individual fatty acid turnover in barramundi Lates calcarifer

An experiment was conducted with barramundi (Asian seabass; Lates calcarifer) to examine the allometric scaling effect of individual fatty acids. Six treatment size classes of fish were deprived of food for 21 days (Treatment A, 10.5 &plusmn; 0.13 g; Treatment B, 19.2 &plusmn; 0.11 g; Treatment C, 28.3 &plusmn; 0.05 g; Treatment D, 122.4 &plusmn; 0.10 g; Treatment E, 217.6 &plusmn; 0.36 g; Treatment F, 443.7 &plusmn; 1.48 g; mean&plusmn; SD) with each treatment comprising of fifteen fish, in triplicate. The assessment of somatic losses of whole-body energy and lipidwere consistentwith previous studies, validating themethodology to be extended to individual fatty acids. Live-weight (LW)exponent values were determined to be 0.817 &plusmn; 0.010 for energy and 0.895 &plusmn; 0.007 for lipid. There were significant differences among the fatty acids ranging from 0.687 &plusmn; 0.005 for 20:5n-3 (eicosapentaenoic acid) and 0.954 &plusmn; 0.008 for 18:1n-9 (oleic acid). The LW exponent values were applied to existing fatty acid intake and deposition data of barramundi fed with either 100% fish oil or 100% poultry oil. From this the maintenance requirement for each fatty acid was determined. The metabolic demands for maintenance and growth were then iteratively determined for fish over a range of size classes. Application of these exponent values to varying levels of fatty acid intake demonstrated that the biggest driver in the utilisation of fatty acids in this species is deposition demand and despite their reputed importance, the long-chain polyunsaturated fatty acids had nominal to no maintenance requirement

Isolation and quantification of dialkylmercury species by headspace solid phase microextraction and gas Chromatography with Atomic Emission detection

A methodology to quantify dialkylmercury compounds using Headspace Solid Phase Microextraction (HS-SPME) and Gas Chromatography with Atomic Emission Detection (GC-AED) was developed. The parameters for Hg detection were optimized by factorial design and response surfaces. Univariate experiments were employed to determine the HS-SPME conditions; 75 &#956;m Carboxen / PDMS and 65 &#956;m PDMS / DVB were the best fibers. However, the former was excluded from further experiments due to extensive thermal degradation of analytes during desorption. The optimized procedure allowed detection of the analytes from aqueous samples with LOD of 1.7 ng L-1 and 0.2 ng L-1 for dimethyl- and diethylmercury, respectively. The analytical curves are linear in the range from 36 to 180 ng L-1 (Me2Hg) and 38 to 190 ng L-1 (Et2Hg), with LOQ of 38 ng L-1 (Me2Hg) and 29 ng L-1 (Et2Hg) and correlation coefficients of 0.998 for Me2Hg and 0.999 for Et2Hg.Foi desenvolvida uma metodologia para quantificar compostos dialquilmercúricos usando Microextração em Fase Sólida em Headspace (HS-SPME) e Cromatografia Gasosa com Detecção por Emissão Atômica (GC-AED). Os parâmetros para detecção de Hg foram otimizados usando planejamento fatorial e superfícies de resposta. Experimentos univariados foram empregados para determinar as condições de HS-SPME; as melhores fibras foram 75 &#956;m de Carboxen / PDMS e 65 &#956;m de PDMS / DVB. Porém, as primeiras foram descartadas pela extensa degradação térmica dos analitos na dessorção. O procedimento otimizado permite detectar os analitos em amostras aquosas com limite de detecção de 1,7 e 0,2 ng L-1 para dimetil- and dietilmercúrio, respectivamente. As curvas analíticas são lineares nas faixas de 36 a 180 ng L-1 (Me2Hg) e 38 a 190 ng L-1 (Et2Hg), com limite de quantificação de 38 ng L-1 (Me2Hg) e 29 ng L-1 (Et2Hg) e coeficientes de correlação de 0,998 para Me2Hg e 0,999 para Et2Hg.10411047Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq

A cross-national study of childhood autism

Autism is considered to be a chronic developmental disability that affects communication, relationships, emotional development and imagination (NAS, 2010). Prevalence rates for autism spectrum disorder (ASD) suggest that the rates have increased over time and recent research shows that 1 in 68 children are diagnosed with the disorder (Baio, 2014). These children’s difficulties in the areas of communication, social skills and restricted/repetitive behaviours and interests lead to the need of therapeutic support (APA, 2013) and often it falls to parents to find an appropriate treatment for their child (Marcus et al, 2005). Among recommended services to these children are speech and language therapy, occupational therapy (Johnson and Myer, 2007) and psychotherapy (Alvarez et al, 1999). There are a number of intervention approaches for children with autism that have been developed, however none have been universally accepted as being the most effective (Farrell et al, 2005). As a result, parents often find it difficult to know which is the most appropriate approach for their child. This study aims to explore the development of children with autism over time in the areas of social skill and communication, regardless of the kind of treatment (speech and language therapy, psychoanalytic/psychodynamic psychotherapy and occupational therapy) they are receiving and to investigate the association between therapy context and the patterns of developmental change. This thesis is designed as a cross-national study in order to examine the aspects of the disorder that differ in the UK and Greece along with the differences (if any) in the developmental patterns across countries. The significance of doing a cross-national study is to explore autism from a wider international perspective and to identify any differences and similarities across the two countries. Twenty children with autism who had completed one of two differing types of treatment in the UK (psychotherapy, n=10 and speech and language therapy, n=10) were recruited to be monitored post-therapy twice over a two-year period. Twenty children with autism who had received one of two types of treatment in Greece (occupational therapy, n=10 and speech and language therapy, n=10) were also recruited to be monitored post-therapy twice over a two-year period. The research found that all children changed significantly over time on all aspects of measurement. Furthermore, no significant differences were found in the children from the two different countries at the start of the study and they developed in a very similar way as well. The results suggested though that based on the ADOS-Social (p=0.008) and ADOS-Imagination (p=0.008) children in the UK improve faster in the areas of social skill, imagination and the CDI-no of words understood and produced (p=0.015) showed an increase in their ability to understand and say words compared to the children in Greece. However, the CDI-no of words understood (p=0.027) showed that the children in Greece improved faster in the area of comprehension. The children who received SLT are also mainly developing in a very similar way across the two countries. Most measures showed change over time, except for the SCQ (p=0.081), ADOS-Ster (p=0.050) and CDI-U (p=0.141|). Also, only the ADOS-Social (p=0.021) and the Social Communication Questionnaire (p=0.021) showed a significant interaction effect. Thus, the SLT group from the UK seems to improve faster in the area of social skills compared to the SLT group from Greece. Additionally, in regards to the effect of the therapy context on the developmental pattern of children with autism, there were no differences across intervention contexts at the beginning and there were mainly non-significant interactions in the rate of change across the differing types of intervention. The findings suggested that all measures showed change over time. Only the SCQ (p=0.041) and the ADOS-imagination (p=0.033) showed a significant interaction effect before adjusting for age. Therefore, the SLT group in the UK seems to improve faster in the social communication area and the Psychotherapy group in the UK improved faster in the area of imagination. Conclusively, the SLT groups showed more change on language and communication measures, whilst the psychotherapy and occupational therapy groups saw changes in other areas of autistic symptomatology not achieved in the SLT groups, such as imagination and stereotypical behaviour. In summary, the current study helps parents gain better insight in different therapy choices and raises awareness of other types of therapy that are available in terms of intervention. The findings of this study can help professionals who work with children with autism further their understanding of the disorder and how it manifests through time in order to provide appropriate services based on each child’s needs. Additionally, the cross-national approach was intended to give some suggestions about the manifestation of autism across countries and about the way childhood autism is treated in each country. In regards to the more specific changes that the analysis revealed, they seem to fit well with the intervention targets of each type of therapy. Thus, the analysis suggested that certain characteristics tend to be associated with specific treatment types, which leads us to believe that sometimes the most effective course of treatment is a combination of therapies depending on the individual needs of each family. Finally, the results of this study offer original findings with respect to the outcomes of psychodynamic/psychoanalytic psychotherapy for children with autism since there is a lack of rigorous research in this field

Postprandial plasma free amino acid profile and hepatic gene expression in juvenile barramundi (Lates calcarifer) is more responsive to feed consumption than to dietary methionine inclusion

The effects of dietary methionine (Met) supply on the postprandial pattern of plasma free amino acids and the differential expression of several genes associated with a number of sulfur amino acid and protein turnover pathways in the liver of juvenile barramundi (Lates calcarifer) was investigated. At the conclusion of a 49-day growth trial assessing the requirement for dietary Met, three treatments were selected (with deficient (DEF; 8.6 g kg−1), adequate (ADQ; 14.9 g kg−1) and excessive (EXC; 21.4 g kg−1)) levels of dietary Met, based on their respective growth responses. A peak occurred in plasma free Met at 2 h post-feeding in fish fed the DEF and ADQ diets and at 4 h post-feeding in fish in the EXC treatment. Liver samples collected at these timepoints, as well as those taken as a pre-feeding control, were analyzed for expression of genes involved in Met turnover (CGL, MAT-1, MAT-2a) and taurine biosynthetic pathways (CSAD, ADO, CDO), target of rapamycin inhibition (Redd-1), the somatotropic axis (GHR-II, IGFI, IGF-II) and protein turnover pathways (MUL-1, ZFAND-5). Markers of sulfur amino acid turnover were more significantly affected by time after feeding than by dietary Met level, suggesting production of these enzymes may be primarily regulated by the consumption of feed or protein, rather than by the dietary composition. Further, metabolised Met appeared likely to have been directed through S-Adenosylmethionine (SAM) dependent pathways, rather than converted to Cys, which may have contributed to the observed growth response. Both genes influencing the conversion of Met to SAM appear to be active at this lifestage in barramundi. Previously described markers of proteolytic pathways appear to be conserved in this species and we have confirmed that ZFAND-5 is a reliable biomarker of this process in barramundi. A number of important genes were investigated for the first time in this species and shown to be nutritionally regulated

Polarization observations in a low synchrotron emission field at 1.4 GHz

We present the first observation of the diffuse polarized synchrotron radiation of a patch ($\sim 3^\circ \times 3^\circ$) in the BOOMERanG field, one of the areas with the lowest CMB foreground emission. The work has been carried out with the Australia Telescope Compact Array at 1.4 GHz with 3.4 arcmin resolution and sensitivity of $\sim 0.18$ mJy beam$^{-1}$. The mean polarized signal has been found to be $P_{rms} = \sqrt{(Q_{rms}^2 + U_{rms}^2)} = 11.6 \pm 0.6$ mK, nearly one order of magnitude below than in the Galactic Plane. Extrapolations to frequencies of interest for cosmological investigations suggest that polarized synchrotron foreground noise should allow the detection of the CMB Polarization $E$--mode already at 32 GHz and make us confident that, at 90 GHz, it is accessible with no relevant foreground contamination. Last but not least, even the $B$--mode detection for $T/S > 0.01$ is not ruled out in such a low emission patch.Comment: Uses emulateapj.sty, onecolfloat.sty, 5 pages 4 fig., accepted for publication in ApJ