1,119 research outputs found
Cognitive-academic language proficiency and language acquisition in bilingual instruction : with an outlook on a university project in Albania
Based on the concepts of bilingual education of Cummins, this paper
explores the contribution of cognitive-academic language proficiency to the
acquisition of a second language in instructional contexts. Cummins' threshold
hypothesis is interpreted not as referring to an unspecified level of language
competence presupposed for positive development in bilingual instructional
contexts but as referring to an adequate level of cognitive-academic proficiency
that allows sufficient orientation in the proceedings a/the classroom. The analysis
of a sample text taken from a textbook for fourth grade illustrates this paint and
leads to a discussion of consequences for the language classroom. In the last part
of the paper educational practices in Albania are considered in this context." A
review of a joint project undertaken by the University of Graz in Austria and the
University of Shkoder in Albania, shows that cognitive academic proficiency is
along with situational and motivational factors a key element determining success
in educational contexts, where a foreign language - in this case German - is used
as a language of instruction.peer-reviewe
Experimental summary 1987
Barley
II. Scald and mildrew : Seed dressings and sprayings(87E26, MT37 and MT38)
III. Scald and mildew : Seed dressing and fungicide coated superphosphates. (87E27, MT39, MT40 and WH40)
IV. Scald and mildew : Fungicides for longer protection (87ES38 and MT41)
V. Mildew : Survey of virulence genes (87ES46, MT56 and PE22)
VI. Spot-type net blotch : Potential crop losses (87C49 and C55)
VII. Spot-type net blotch : Effect of seed dressings (87C49 and C55)
VIII. Spot-type net blotch : Parent-offspring regression (87C51 and C56)
IX. Leaf stripe : Effect of seed dressings (87M42, MT33 and NA74)
Peas
X. Blackspot : Effect of fungicides (87MT42 and WH41)
XI. Blackspot : Screening for cultivar resistance (87MD10 and MT43
Decadal attribution of historic temperature and ocean heat content change to anthropogenic emissions
We present an alternative method of calculating the historical effective
radiative forcing using the observed temperature record and a kernel based on
the CMIP5 temperature response. This estimate is the effective radiative
forcing time series that the average climate model would need to simulate the
observed global mean surface temperature anomalies. We further infer the
anthropogenic aerosols radiative forcing as a residual using the better-known
greenhouse gas radiative forcing. This allows an independent estimate of
anthropogenic aerosol radiative forcing, which suggests a cooling influence due
to aerosols in the early part of the 20th century. The temporal kernels are
also used to calculate decadal contributions from the dominant forcing agents
to present day temperature, ocean heat content, and thermosteric sea level
rise. The current global mean temperature anomaly is dominated by emissions in
the past two decades, while current ocean heat content is more strongly
affected by earlier decades.Comment: 18 pages, 4 figures, in revision in GR
The local content of all pure two-qubit states
The (non-)local content in the sense of Elitzur, Popescu, and Rohrlich (EPR2)
[Phys. Lett. A 162, 25 (1992)] is a natural measure for the (non-)locality of
quantum states. Its computation is in general difficult, even in low
dimensions, and is one of the few open questions about pure two-qubit states.
We present a complete solution to this long-lasting problem.Comment: 9 pages, 3 figure
One-dimensional Ising ferromagnet frustrated by long-range interactions at finite temperatures
We consider a one-dimensional lattice of Ising-type variables where the
ferromagnetic exchange interaction J between neighboring sites is frustrated by
a long-ranged anti-ferromagnetic interaction of strength g between the sites i
and j, decaying as |i-j|^-alpha, with alpha>1. For alpha smaller than a certain
threshold alpha_0, which is larger than 2 and depends on the ratio J/g, the
ground state consists of an ordered sequence of segments with equal length and
alternating magnetization. The width of the segments depends on both alpha and
the ratio J/g. Our Monte Carlo study shows that the on-site magnetization
vanishes at finite temperatures and finds no indication of any phase
transition. Yet, the modulation present in the ground state is recovered at
finite temperatures in the two-point correlation function, which oscillates in
space with a characteristic spatial period: The latter depends on alpha and J/g
and decreases smoothly from the ground-state value as the temperature is
increased. Such an oscillation of the correlation function is exponentially
damped over a characteristic spatial scale, the correlation length, which
asymptotically diverges roughly as the inverse of the temperature as T=0 is
approached. This suggests that the long-range interaction causes the Ising
chain to fall into a universality class consistent with an underlying
continuous symmetry. The e^(Delta/T)-temperature dependence of the correlation
length and the uniform ferromagnetic ground state, characteristic of the g=0
discrete Ising symmetry, are recovered for alpha > alpha_0.Comment: 12 pages, 7 figure
1981 Plant viruses
1, Clover viruses - 81HA6, 81MA9, 81BR14, 81BY12, 81BH5, 81AL38, 81ES39 OBJECTIVES: To determine the extent of the \u27Dinninup virus\u27 problem (sub. clover mottle). To further assess the incidence of red leaf virus to determine the incidence of bean yellow mosaic virus. To note the incidence of sub. clover stunt virus. A. BYDV: Survey of incidence - 81BU1, 81BU2, 81BR11, 81BR12, 81MA6, 81MA7, 81AL31, 81AL32, 81JE14, 81JE15, 81KA21, 81KA22, 81NA28, 81N031, 81ES38, 81E26. 2. Barley yellow dwarf virus. BYDV: Genotype x insecticide studies - 81MN14, 81MT29, 81E28, 81MN14. BYDV: differences amongst barley genotypes - 81C19, 81WH31, 81BA30. BYDV: Resistance and yield in CV.Shannon and CV. Proctor - 871BR13, 81MA8, 81AL36, 81JE17 Yield per plot and 100 seed weight - Albany 81AL36 Infection of BYDV in cereal genotypes at Manjimup ( 81MN13)
Options to Accelerate Ozone Recovery: Ozone and Climate Benefits
The humankind or anthropogenic influence on ozone primarily originated from the chlorofluorocarbons and halons (chlorine and bromine). Representatives from governments have met periodically over the years to establish international regulations starting with the Montreal Protocol in 1987, which greatly limited the release of these ozone-depleting substances (DDSs). Two global models have been used to investigate the impact of hypothetical reductions in future emissions of ODSs on total column ozone. The investigations primarily focused on chlorine- and bromine-containing gases, but some computations also included nitrous oxide (N2O). The Montreal Protocol with ODS controls have been so successful that further regulations of chlorine- and bromine-containing gases could have only a fraction of the impact that regulations already in force have had. if all anthropogenic ODS emissions were halted beginning in 2011, ozone is calculated to be higher by about 1-2% during the period 2030-2100 compared to a case of no additional ODS restrictions. Chlorine- and bromine-containing gases and nitrous oxide are also greenhouse gases and lead to warming of the troposphere. Elimination of N 20 emissions would result in a reduction of radiative forcing of 0.23 W/sq m in 2100 than presently computed and destruction of the CFC bank would produce a reduction in radiative forcing of 0.005 W/sq m in 2100. This paper provides a quantitative way to consider future regulations of the CFC bank and N 20 emission
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