132 research outputs found
Ruimte voor akkers en tuinen, bomen en bollen : verkenning naar ontwikkelingen in de akkerbouw en opengrondstuinbouw en effecten hiervan op natuur en landschap
Invloed van landbouwkundig grondgebruik op natuur en alndschap: een inventaristatie door Natuurplanburea
‘Focus on the Learner’ in Teacher Education: PAR as a Strategy to Enable Student Voice in Schools
The current presentation addresses characteristics of
the TE program, PSTs learning outcomes, and enabling and constraining factors
in the development and enactment of PAR.
Research questions:What are the characteristics of a TE program aimed at preparing PSTs for conducting PAR with school students, and fostering school student participation in educational decision-making?What learning processes of PSTs towards school student participation are supported through the TE program?What factors enable or constrain attaining the goals of the PAR initiative?
Teaching and Teacher Learning (ICLON
Direct observation by resonant tunneling of the B^+ level in a delta-doped silicon barrier
We observe a resonance in the conductance of silicon tunneling devices with a
delta-doped barrier. The position of the resonance indicates that it arises
from tunneling through the B^+ state of the boron atoms of the delta-layer.
Since the emitter Fermi level in our devices is a field-independent reference
energy, we are able to directly observe the diamagnetic shift of the B^+ level.
This is contrary to the situation in magneto-optical spectroscopy, where the
shift is absorbed in the measured ionization energy.Comment: submitted to PR
Principles for school student participation in pre-service teacher action research: a practice architecture’s perspective
This study focuses on pre-service teachers’ views of the conditions that foster their participatory action research practices in secondary schools and on how these conditions can inform the development of a teacher education program for a participatory approach. By using the Theory of Practice Architectures as an analytical lens, eight cases of participatory action research projects were studied at two interrelated sites of pre-service teachers’ learning: the teacher education institute and the internship school. Findings shed light on the conditions for fostering participatory action research practices in a teacher education context in terms of three kinds of arrangements, i.e. cultural-discursive, material-economic, and social-political. Based on the findings, a set of 17 principles for supporting participatory research practices is presented that can be used to assess the viability of preservice teachers’ participatory action research within a teacher education program, and that also supports a well-aligned institute-school collaboration.Teaching and Teacher Learning (ICLON
Mother-to-Infant Bonding in Women with Postpartum Psychosis and Severe Postpartum Depression: A Clinical Cohort Study
Mother-to-infant bonding is important for long-term child development. The aim of this
study was to investigate bonding in women admitted to a Mother and Baby Unit with postpartum
depression (PD, n = 64) and postpartum psychosis (PP, n = 91). Participants completed the Postpartum
Bonding Questionnaire (PBQ), the Edinburgh Postnatal Depression Scale (EPDS) and the Young
Mania Rating Scale (YMRS) weekly during admission. At admission, 57.1% of women with PD
had impaired bonding, compared to only 17.6% of women with PP (p-value < 0.001). At discharge,
only 18.2% of women with PD and 5.9% of women with PP still experienced impaired bonding
(p-value = 0.02). There was a strong association between decrease of depressive and manic symptoms
and improved bonding over an eight-week admission period. In a small group of women (5.7%)
impaired bonding persisted despite being in remission of their psychiatric disorder. The results
from our study show that impaired bonding is a more present and evidently severe problem in
postpartum depression but not so much in postpartum psychosis. Treatment of depressive symptoms
will improve bonding in almost all women, but clinicians should assess if impaired bonding is still
present after remission because for a small group special care and treatment focused on bonding
might be required
Genetic Markers in Long-Term Survivors of Glioblastoma Multiforme
Scope: Genistein from foods or supplements is metabolized by the gut microbiota and the human body, thereby releasingmany different metabolites into systemic circulation. The order of their appearance in plasma and the possible influence of food format are still unknown. This study compared the nutrikinetic profiles of genistein metabolites. Methods and results: In a randomized cross-over trial, 12 healthy young volunteers were administered a single dose of 30mggenistein provided as a genistein tablet, a genistein tablet in low fat milk, and soy milk containing genistein glycosides. A high mass resolution LC-LTQ-Orbitrap FTMS platform detected and quantified in human plasma: free genistein, seven of its phase-II metabolites and 15 gut-derived metabolites. Interestingly, a novel metabolite, genistein-4- glucuronide-7-sulfate (G-4 G7S) was identified. Nutrikinetic analysis using population-based modeling revealed the order of appearance of five genistein phase II metabolites in plasma: (1) genistein-4,7-diglucuronide, (2) genistein-7-sulfate, (3) genistein-4--sulfate-7-glucuronide, (4) genistein-4-glucuronide, and (5) genistein-7-glucuronide, independent of the food matrix. Conclusion: The conjugated genistein metabolites appear in a distinct order in human plasma. The specific early appearance of G-4 ,7-diG suggests a multistep formation process for the mono and hetero genistein conjugates, involving one or two deglucuronidation steps
Spontaneous symmetry breaking on the lattice generated by Yukawa interaction
We study by numerical simulation a lattice Yukawa model with naive fermions
at intermediate values of the Yukawa coupling when the nearest neighbour
coupling \kp of the scalar field is very weakly ferromagnetic (\kp
\approx 0) or even antiferromagnetic () and the nonvanishing value
of \vev is generated by the Yukawa interaction. The renormalized Yukawa
coupling achieves here its maximal value and this -region is thus of
particular importance for lattice investigations of strong Yukawa interaction.
However, here the scalar field propagators have a very complex structure caused
by fermion loop corrections and by the proximity of phases with
antiferromagnetic properties. We develop methods for analyzing these
propagators and for extracting the physical observables. We find that going
into the negative \kp region, the scalar field renormalization constant
becomes small and does not seem to exceed the unitarity bound, making the
existence of a nontrivial fixed point in the investigated Yukawa model quite
unlikely.Comment: 22 pages plus 13 figure
Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in √s = 7 TeV pp collisions with the ATLAS detector
A search for the direct production of charginos and neutralinos in final states with three electrons or muons and missing transverse momentum is presented. The analysis is based on 4.7 fb−1 of proton–proton collision data delivered by the Large Hadron Collider and recorded with the ATLAS detector. Observations are consistent with Standard Model expectations in three signal regions that are either depleted or enriched in Z-boson decays. Upper limits at 95% confidence level are set in R-parity conserving phenomenological minimal supersymmetric models and in simplified models, significantly extending previous results
Jet size dependence of single jet suppression in lead-lead collisions at sqrt(s(NN)) = 2.76 TeV with the ATLAS detector at the LHC
Measurements of inclusive jet suppression in heavy ion collisions at the LHC
provide direct sensitivity to the physics of jet quenching. In a sample of
lead-lead collisions at sqrt(s) = 2.76 TeV corresponding to an integrated
luminosity of approximately 7 inverse microbarns, ATLAS has measured jets with
a calorimeter over the pseudorapidity interval |eta| < 2.1 and over the
transverse momentum range 38 < pT < 210 GeV. Jets were reconstructed using the
anti-kt algorithm with values for the distance parameter that determines the
nominal jet radius of R = 0.2, 0.3, 0.4 and 0.5. The centrality dependence of
the jet yield is characterized by the jet "central-to-peripheral ratio," Rcp.
Jet production is found to be suppressed by approximately a factor of two in
the 10% most central collisions relative to peripheral collisions. Rcp varies
smoothly with centrality as characterized by the number of participating
nucleons. The observed suppression is only weakly dependent on jet radius and
transverse momentum. These results provide the first direct measurement of
inclusive jet suppression in heavy ion collisions and complement previous
measurements of dijet transverse energy imbalance at the LHC.Comment: 15 pages plus author list (30 pages total), 8 figures, 2 tables,
submitted to Physics Letters B. All figures including auxiliary figures are
available at
http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2011-02
Antiulcer, wound healing and hepatoprotective activities of the seaweeds Gracilaria crassa, Turbinaria ornata and Laurencia papillosa from the southeast coast of India
- …