1,359 research outputs found
Far infrared and photoacoustic characterization of iodine doped PbTe
Single crystal samples of PbTe doped with PbI2 were made using the Bridgman technique. Far infrared reflectivity diagrams of PbTe doped with 0.4 at% and 0.6 at% Iodine were measured and numerically analyzed. A plasma resonance at about 650 cm(-1) with the reflectivity minima very close to zero was observed for both samples. Thermal diffusivity was determined for the same samples using the photoacoustic method with a transmission detection configuration and the values of the minority free carrier (holes) mobility were calculated
Formalising the Continuous/Discrete Modeling Step
Formally capturing the transition from a continuous model to a discrete model
is investigated using model based refinement techniques. A very simple model
for stopping (eg. of a train) is developed in both the continuous and discrete
domains. The difference between the two is quantified using generic results
from ODE theory, and these estimates can be compared with the exact solutions.
Such results do not fit well into a conventional model based refinement
framework; however they can be accommodated into a model based retrenchment.
The retrenchment is described, and the way it can interface to refinement
development on both the continuous and discrete sides is outlined. The approach
is compared to what can be achieved using hybrid systems techniques.Comment: In Proceedings Refine 2011, arXiv:1106.348
Varieties of developmental dyslexia in Greek children
The current study aimed to investigate in a group of nine Greek children with dyslexia (mean age 9.9 years) whether the surface and phonological dyslexia subtypes could be identified. A simple regression was conducted using printed word naming latencies and nonword reading accuracy for 33 typically developing readers. Ninety per cent confidence intervals were established and dyslexic children with datapoints lying outside the confidence intervals were identified. Using this regression-based method three children with the characteristic of phonological dyslexia (poor nonword reading), two with surface dyslexia (slow word naming latencies) and four with a mixed profile (poor nonword reading accuracy and slow word naming latencies) were identified. The children were also assessed in spelling to dictation, phonological ability, rapid naming, visual memory and multi-character processing (letter report). Results revealed that the phonological dyslexia subtype children had difficulties in tasks of phonological ability, and the surface subtype children had difficulties in tasks of multi-character simultaneous processing ability. Dyslexic children with a mixed profile showed deficits in both phonological abilities and multi-character processing. In addition, one child with a mixed profile showed a rapid naming deficit and another showed a difficulty in visual memory for abstract designs. Overall the results confirm that the surface and phonological subtypes of developmental dyslexia can be found in Greek-speaking children. They also indicate that different subtypes are associated with different underlying disorders
Effect of transport-induced charge inhomogeneity on point-contact Andreev reflection spectra at ferromagnet-superconductor interfaces
We investigate the transport properties of a ferromagnet-superconductor
interface within the framework of a modified three-dimensional
Blonder-Tinkham-Klapwijk formalism. In particular, we propose that charge
inhomogeneity forms via two unique transport mechanisms, namely, evanescent
Andreev reflection and evanescent quasiparticle transmission. Furthermore, we
take into account the influence of charge inhomogeneity on the interfacial
barrier potential and calculate the conductance as a function of bias voltage.
Point-contact Andreev reflection (PCAR) spectra often show dip structures,
large zero-bias conductance enhancement, and additional zero-bias conductance
peak. Our results indicate that transport-induced charge inhomogeneity could be
a source of all these anomalous characteristics of the PCAR spectra.Comment: 9 pages, 6 figure
Statement complementing the EFSA Scientific Opinion on application (EFSAâGMOâNLâ2009â75) for placing on the market of genetically modified oilseed rape Ms8 Ă Rf3 Ă GT73 and subcombinations, which have not been authorised previously (i.e. Ms8 Ă GT73 and Rf3 Ă GT73) independently of their origin, for food and feed uses, import and processing, with the exception of isolated seed protein for food, under Regulation (EC) No 1829/2003), taking into consideration additional information
The EFSA Panel on Genetically Modified Organisms (GMO) previously assessed oilseed rape Ms8 Ă Rf3 Ă GT73 and its subcombinations Ms8 Ă GT73 and Rf3 Ă GT73 according to the scope as defined in the application EFSAâGMOâNLâ2009â75, and was not in the position to complete the safety assessment of products rich in protein, such as rapeseed protein isolates or products of this nature in animal feeding. Following a mandate from the European Commission, the GMO Panel assessed a 28âday toxicity study in mice with the glyphosate oxidoreductase (GOXv247) protein, provided to complement information related to application EFSAâGMOâNLâ2009â75 for the placing on the market of oilseed rape Ms8 Ă Rf3 Ă GT73 and its subcombinations Ms8 Ă GT73 and Rf3 Ă GT73, for food and feed uses, import and processing, with the exception of isolated seed protein for food. The 28âday toxicity study on Escherichia coliâ produced GOXv247 protein did not show adverse effects in mice, at the gavage doses up to 1000 mg/kg body weight (bw) per day. Taking into account its previous assessment on EFSAâGMOâNLâ2009â75 and the outcome of the 28âday toxicity study in mice with the GOXv247 protein provided in this mandate, the GMO Panel, based on a weight of evidence approach, concludes that food and feed containing, consisting and produced from genetically modified oilseed rape Ms8 Ă Rf3 Ă GT73 and its sub combinations Ms8 Ă GT73 and Rf3 Ă GT73, are as safe as its conventional counterpart, according to the scope as defined in the application EFSAâGMOâNLâ2009â75
Far infrared and photoacoustic characterization of iodine doped PbTe
Single crystal samples of PbTe doped with PbI2 were made using the Bridgman technique. Far infrared reflectivity diagrams of PbTe doped with 0.4 at% and 0.6 at% Iodine were measured and numerically analyzed. A plasma resonance at about 650 cm(-1) with the reflectivity minima very close to zero was observed for both samples. Thermal diffusivity was determined for the same samples using the photoacoustic method with a transmission detection configuration and the values of the minority free carrier (holes) mobility were calculated
Assessment of genetically modified maize MON 87427 Ă MON 89034 Ă MIR162 Ă MON 87411 and subcombinations, for food and feed uses, under Regulation (EC) No 1829/2003 (application EFSAâGMOâNLâ2017â144)
Maize MON 87427 Ă MON 89034 Ă MIR162 Ă MON 87411 (fourâevent stack maize) was produced by conventional crossing to combine four single events: MON 87427, MON 89034, MIR162 and MON 87411. The genetically modified organism (GMO) Panel previously assessed the four single maize events and four of the subcombinations and did not identify safety concerns. No new data on the single maize events or the four subcombinations that could lead to modification of the original conclusions on their safety were identified. The molecular characterisation, comparative analysis (agronomic, phenotypic and compositional characteristics) and the outcome of the toxicological, allergenicity and nutritional assessment indicate that the combination of the single maize events and of the newly expressed proteins and dsRNA in the fourâevent stack maize does not give rise to food and feed safety and nutritional concerns. The GMO Panel concludes that the fourâevent stack maize, as described in this application, is as safe as and nutritionally equivalent to its nonâGM comparator and the nonâGM reference varieties tested. In the case of accidental release of viable grains of the fourâevent stack maize into the environment, this would not raise environmental safety concerns. The GMO Panel assessed the likelihood of interactions among the single events in the six maize subcombinations not previously assessed and concludes that these are expected to be as safe as and nutritionally equivalent to the single events, the previously assessed subcombinations and the fourâevent stack maize. The postâmarket environmental monitoring plan and reporting intervals are in line with the intended uses of the fourâevent stack maize. Postâmarket monitoring of food/feed is not considered necessary. The GMO Panel concludes that the fourâevent stack maize and its subcombinations are as safe as its nonâGM comparator and tested nonâGM reference varieties with respect to potential effects on human and animal health and the environment
Assessment of genetically modified maize\ua04114 for food and feed uses, under Regulation (EC) No\ua01829/2003 (application EFSA-GMO-NL-2014-123)
Maize\ua04114 was developed through Agrobacterium\ua0tumefaciens-mediated transformation to provide protection against certain lepidopteran and coleopteran pests by expression of the Cry1F, Cry34Ab1 and Cry35Ab1 proteins derived from Bacillus\ua0thuringiensis, and tolerance to the herbicidal active ingredient glufosinate-ammonium by expression of the PAT protein derived from Streptomyces viridochromogenes. The molecular characterisation data did not identify issues requiring assessment for food/feed safety. None of the compositional, agronomic and phenotypic differences identified between maize\ua04114 and the non-genetically modified (GM) comparator(s) required further assessment. There were no concerns regarding the potential toxicity and allergenicity of the newly expressed proteins Cry1F, Cry34Ab1, Cry35Ab1 and PAT, and no evidence that the genetic modification might significantly change the overall allergenicity of maize 4114. The nutritional value of food/feed derived from maize 4114 is not expected to differ from that derived from non-GM maize varieties and no post-market monitoring of food/feed is considered necessary. In the case of accidental release of viable maize\ua04114 grains into the environment, maize\ua04114 would not raise environmental safety concerns. The post-market environmental monitoring plan and reporting intervals are in line with the intended uses of maize\ua04114. The genetically modified organism (GMO) Panel\ua0concludes that maize\ua04114 is as safe as the non-GM comparator(s) and non-GM reference varieties with respect to potential effects on human and animal health and the environment in the context of the scope of this application
Assessment of genetically modified soybean MON 87705 Ă MON 87708 Ă MON 89788, for food and feed uses, under Regulation (EC) No 1829/2003 (application EFSAâGMOâNLâ2015â126)
Soybean MON 87705 Ă MON 87708 Ă MON 89788 (threeâevent stack soybean) was produced by conventional crossing to combine three single soybean events: MON 87705, MON 87708 and MON 89788. This combination is intended to alter the fatty acid profile in the seed (in particular increasing the levels of oleic acid) and tolerance to glyphosateâbased and dicamba herbicides. The Genetically Modified Organisms Panel previously assessed the three single soybean events and did not identify safety concerns. No new data on the single soybean events, leading to modification of the original conclusions on their safety have been identified. The molecular characterisation, comparative analysis (agronomic, phenotypic and compositional characteristics) and the outcome of the toxicological, allergenicity and nutritional assessment indicate that the combination of the single soybean events and of the newly expressed proteins in the threeâevent stack soybean does not give rise to food and feed safety and nutritional concerns. In the case of accidental release of viable threeâevent stack soybean seeds into the environment, this would not raise environmental safety concerns. The postâmarket environmental monitoring plan and the reporting intervals are in line with the intended uses of soybean MON 87705 Ă MON 87708 Ă MON 89788. Considering the altered fatty acid profile of the threeâevent stack soybean, a proposal for postâmarket monitoring needs to be provided by the applicant. The GMO Panel notes that in the context of this application EFSAâGMOâNLâ2015â126 the applicant did not provide a 90âday study on MON 87705 soybean in line with the applicable legal requirements. Therefore, the GMO Panel is not in the position to finalise the risk assessment of soybean MON 87705 Ă MON 87708 Ă MON 89788 under the current regulatory frame
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