Aspects of integrability in a classical model for non-interacting fermionic fields

In this work we investigate the issue of integrability in a classical model for noninteracting fermionic fields. This model is constructed via classical-quantum correspondence obtained from the semiclassical treatment of the quantum system. Our main finding is that the classical system, contrary to the quantum system, is not integrablein general. Regarding this contrast it is clear that in general classical models for fermionic quantum systems have to be handled with care. Further numerical investigation of the system showed that there may be islands of stability in the phase space. We also investigated a similar model that is used in theoretical chemistry and found this one to be most probably integrable, although also here the integrability is not assured by the quantum-classical correspondence principle

Justification of the Main Pedagogical Conditions of Interactive Teaching a Foreign Language in High School

This research paper was conducted to examine the main pedagogical conditions in the organization of interactive teaching at higher education system. Today, the interactive learning is widely used in all aspects of the educational process: at colleges, at the universities, in courses and workshops, because this technique is extremely effective not only in terms of acquiring knowledge, but also by the personal skills formation, we decided to reveal four pedagogical conditions of interactive teaching and its organization for teaching foreign language competence in high school. The use of interactive forms, methods, approaches and new information technology in the classroom for foreign language provide ample opportunity for the formation of the students the knowledge and skills that will grow into the necessary professional foreign language competence of teachers

Habitat distribution modeling reveals vegetation flammability and land use as drivers of wildfire in SW Patagonia

Despite important recent advances in modeling current and future global fire activity in relation to biophysical predictors there remain important uncertainties about finer-scale spatial heterogeneity of fire and especially about human influences which are typically assessed at coarse-spatial resolutions. The purpose of the current study is to quantify the influence of biophysical and anthropogenic variables on the spatial distribution of wildfire activity between 1984 and 2010 over an extensive southern Patagonian-Andean region from ca. 43° to 53° S extending from coastal rainforests to xeric woodland and steppe. We used satellite imagery to map all detectable fires > 5 ha from 1984 to 2010 in four study areas (each of 13,100 to 36,635 km2) and field checked 65 of these burns for accuracy of burned vegetation class and fire perimeters. Then, we used the MaxEnt modeling technique to assess the relationships of wildfire distributions to biophysical and human environmental variables in each of the four regions. The 232 fires > 5 ha mapped in the four study areas accounted for an area of 1,314 km2 indicating that at least 1.8% of the total area burned between 1984 and 2010. In general, areas with intermediate productivity levels (e.g. shrublands) have higher fire probability compared with areas of low and high productivity levels, such as steppe and wet forests, respectively. There is a marked contrast in the flammability of broad vegetation classes in determining fire activity at a regional scale, as well as a strong spatial relationship of wildfires to anthropogenic variables. The juxtaposition of fire-resistant tall forests with fire-prone shrublands and woodlands creates the potential for positive feedbacks from human-set fires to gradually increase the flammability of extensive landscapes through repeated burning. Distance to roads and settlements were also strong predictors, suggesting that fire in all regions is ignition-limited. However, these anthropogenic predictors influenced probability of fire differently among study regions depending on their main land-use practices and their past and present socioeconomic contexts.Fil: Paritsis, Juan. State University Of Colorado-boulder; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte. Instituto de Investigación en Biodiversidad y Medioambiente; ArgentinaFil: Holz, Andrés. State University Of Colorado-boulder; Estados UnidosFil: Veblen, Thomas T.. State University Of Colorado-boulder; Estados UnidosFil: Kitzberger, Thomas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte. Instituto de Investigación en Biodiversidad y Medioambiente; Argentin

Characterization of sub-monolayer coatings as novel calibration samples for X-ray spectroscopy

With the advent of both modern X-ray fluorescence (XRF) methods and improved analytical reliability requirements the demand for suitable reference samples has increased. Especially in nanotechnology with the very low areal mass depositions, quantification becomes considerably more difficult. However, the availability of suited reference samples is drastically lower than the demand. Physical vapor deposition (PVD) techniques have been enhanced significantly in the last decade driven by the need for extremely precise film parameters in multilayer production. We have applied those techniques for the development of layer-like reference samples with mass depositions in the ng-range and well below. Several types of reference samples were fabricated: multi-elemental layer and extremely low (sub-monolayer) samples for various applications in XRF and total-reflection XRF (TXRF) analysis. Those samples were characterized and compared at three different synchrotron radiation beamlines at the BESSY II electron storage ring employing the reference-free XRF approach based on physically calibrated instrumentation. In addition, the homogeneity of the multi-elemental coatings was checked at the P04 beamline at DESY. The measurements demonstrate the high precision achieved in the manufacturing process as well as the versatility of application fields for the presented reference samples

Tiltak mot skadegjørere i økologisk gulrotproduksjon

Gulrot konkurrerer dårlig mot ugras første halvdel av sesongen og god avling og kvalitet krever at dyrkeren er på rett sted til rett tid med ulike tiltak. Forebyggende tiltak som vekstskifte og god jordkultur er viktig for at gulrota skal komme i god vekst, noe som er et godt planteverntiltak i seg sjøl. I tillegg er det helt nødvendig med kunnskap om de viktigste skadegjørerne og hvilke direkte tiltak som kan benyttes

Tiltak mot skadegjørere i økologisk produksjon av kålvekster

Mange skadegjørere kan ødelegge kvalitet og avling av kålvekster. Skadeomfanget av de ulike skadegjørerne varierer mellom de ulike kålvekstene, ut fra hva som er matnyttig del av planten og lengden på vekstperioden. Økologisk dyrking av slike vekster krever god kunnskap om skadegjørerne. Et gjennomtenkt vekstskifte, tilstrekkelig næring og god jordkultur er nødvendig for god vekst og sterke planter. Direkte tiltak må settes i verk til rett tid. Nytteorganismer kan bidra til å redusere skadeomfanget

Tiltak mot skadegjørere i økologisk produksjon av salat

Ulike skadegjørere kan ødelegge kvalitet og avling for ulike salattyper. Økologisk dyrking av slike vekster krever kunnskap om skadegjørerne og bruk av forebyggende tiltak. Et godt vekstskifte, god jordkultur og dyrking på luftige skifter er nødvendig for god vekst og sterke planter. Direkte tiltak må settes i verk til rett tid

Tiltak mot skadegjørere i økologisk produksjon av salat

Ulike skadegjørere kan ødelegge kvalitet og avling for ulike salattyper. Økologisk dyrking av slike vekster krever kunnskap om skadegjørerne og bruk av forebyggende tiltak. Et godt vekstskifte, god jordkultur og dyrking på luftige skifter er nødvendig for god vekst og sterke planter. Direkte tiltak må settes i verk til rett tid

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