47,363 research outputs found
The A, B, Cs of physical activity, play and motor learning
No full textA substantial amount of international research has documented children’s need for explorative, experiential and challenging physical play. Through versatile and all-round varieties of play forms and play environments children will develop basic movement skills and learn how to master their body in different and challenging situations. Children’s play is motivated through curiosity and fantasy of exploring the environment and this allows them to master their own bodies and learn to move in a variety of different ways.
This symposium will consider how the abilities of: agility, balance and coordination (‘the A,B,Cs’) are stimulated and developed through different and open-ended affordances of play within four different European countries. The purpose of this is to share how the same early movement abilities (A,B,Cs), are developed according to context, culture and environment. The four countries have been chosen as their natural or adapted environments are varied, but they are all used to enhance and help the children to explore, engage in movement that develop their A,B,Cs.
Different kind of A,B,C’s will be demonstrated: Finland through focusing on the use of snow and ice. Belgium through focusing on the use of water and aquatic activities, using the specific CEReKi approach. Norway through focusing on the use of the woods and forest environments and England through the use of beach, sand and indoor environments. The use of tools and equipment to help support the children’s development will be examined as well as the role of the teacher to help aid the early movement skills within each different natural or adapted environment. Photography and illustrations will demonstrate how the A,B,C’s are developed differently within each country.
Paper one - Finnish perspective
The purpose of this presentation is to concretize affordances of Finnish nature during winter – ice and snow. Ice is fascinating slippery surface. It challenge children’s balance and agility constantly, when they are moving or playing on the ice. Children need to activate all their neuro-muscular systems to coordinate their body limbs to keep their balance. Controlling their bodies in different postures while standing or moving helps motivate their play. Therefore, moving on the ice can be seen as playing with own body and trying to keep the balance.
Beautiful white snow is free mattress for children: children are attracted to jump, run, throw, dive, cave, lay, roll, spin and use their creativity and desire to make whatever they imagine to try. These physical activities are excellent stimulation for the movement. Moving in the snow slows down children’s movements and they need to use more strength than without snow.
Nordic children are lucky to have attractive winter affordances, ice and snow to tempt them physically active play. Challenging surfaces and materials demand concentration, which is prerequisite for development of physical abilities and motor coordination. The seasonal variation with changing affordances may be one reason causing good motor competence of Nordic children.
Paper two - Belgium's perspective
The aquatic environment is generally for children a source of pleasure and fulfilment. However, water presents physical characteristics for which the humans are not fundamentally constituted. The ability to move in the water is governed by different rules that the child must appropriates in a progressive way. For example the child has to move from the vertical position to the horizontal position in water. Propulsion uses more the upper limbs than the lower limbs. Water resistance changes the speed of segmental movements and breath must be controlled. The aquatic environment should be discovered in a suitable, progressive and fun way. This is what is proposed with the CEReKi original water familiarization method developed in Belgium.
The purpose of this presentation is to illustrate how an original arrangement can stimulate the agility, balance and coordination (ABC’s) of the child in the water through active play. Specially adapted equipment is introduced into the pool to provide a stimulating environment, allowing children to evolve according to their desire and level. This presentation will show how a synthetic fibre net, bars, floats, a metal cage or slides can be used to develop children's aquatic ABC’s in an adapted and affording environment.
Paper three - Norwegian perspective
Children learn movements and gain bodily experiences by exploring different environments. Through bodily experiences, children explore details and quality of movements such as balance, coordination, speed, agility, force and endurance Children develop perceptual-motor skills through natural spontaneous interaction with the environment. The materiality of the environment affords challenges and experiences that promote motor learning and the children respond by exploring, discovering and face the challenges by mastering perceptual motor skills in context with the environment.
This presentation will demonstrate how children’s physical play is stimulated and developed through different and open-ended affordances of play
“How to encourage explorative and problem-solving play”
“How do landscapes promote motor learning and mastering of bodily competence?”
Approaches:
* Children’s play and learning through experience will be demonstrated through a video of a natural play space
* Open-ended affordances of landscapes will be presented
Literature and case studies showing the contextual environment- child relationship in learning fundamental motor skills will be discussed. Multifunctional and challenging environments seem to have promotive effect on children’s physical and explorative play and should therefore be encouraged as a pedagogical approach in motor learning.
Paper four - English perspective.
Nowhere within the UK is further than 70 miles (113 kilometres) from the coast, and England is made up of 2728 miles (4,422 km) of coastline. The coastline has a variety of natural textures from flat sandy dunes to steep white cliffs such as those found at Dover. The beach and coastline offers English children an almost Jurassic exploration, as it is the place that is full of beauty, history and fossils, with many schools having weekly or daily ‘beach school’ in which the children, learn, explore and play on the beach environment.
The photographs and illustrations provided in the paper will show how the abilities of agility, balance and coordination are developed through a variety of ways using the sand and beach environments. For example the fine and coarse sand are ideal for sensory touch development with children from very young age. Both the actual outdoor environments of the beach and rock pools as well as sand pits, sand boxes and water boxes within indoor settings are used to develop physical curiosity, through hiding objects that the children have to use fine motor skills to dig out, to use pincers to help develop their grasping, reaching and coordination skills
XRD patterns obtained for (a) CS, (b) CS/GO, and (c) CS/GO-S beads.
No full text<p>XRD patterns obtained for (a) CS, (b) CS/GO, and (c) CS/GO-S beads.</p
Cs bonding at the Cs/GaAs(110) interface
No full textEvaporation of a Cs overlayer in the submonolayer and monolayer regime on a cleaved GaAs(110) surface has been studied by core-level photoemission spectroscopy. The experimental results show three different adsorption regimes deduced from the lineshape of the Ga 3d, As 3d and Cs 4d core levels. These spectra, in fact, result from the overlap of different contributions that have been identified as a function of the Cs coverage: (a) at low Cs deposition a prevalent Cs-As binding and a small percentage of Cs-Ga bonds are observed; (b) at intermediate coverage a strong increase of Cs-Ga bonds, with a reduction of the Cs-As feature, is attributed to disruption of the covalent pristine Ga-As bonds and Ga out-diffusion; and (c) at the highest Cs coverage, the relative intensity of the Cs-Ga component goes to saturation, whereas the initial Cs-As intensity is strongly reduced and a high density of As dangling bonds is restored. The nonlocal polarization of the interface with a quite limited charge transfer is detected though the low-energy shift of the core levels. The importance of these results is emphasized with respect to the Cs promoted oxidation of the semiconductor.LSELPRXEcole polytech fed lausanne,phb ecublens,inst phys appl,ch-1015 lausanne,switzerland. Faraci, G, UNIV CATANIA,DIPARTMENTO FIS,IST NAZL FIS MAT,CORSO ITALIA 57,I-95129 CATANIA,ITALY.ISI Document Delivery No.: TW98
Feshbach spectroscopy of an ultracold Rb-Cs mixture
No full textThis thesis reports the observation of interspecies Feshbach resonances in an ultracold mixture of Rb and Cs atoms. A versatile combined magnetic and optical potential has been designed and constructed which is capable of bringing both and to degeneracy, and reaching high phase-space density in . High phase-space density mixtures are the first step required in the production of ultracold polar molecules, the topic of much current research.
The apparatus capitalises on the efficient capture of atoms by a magnetic trap from a magneto-optical trap, and the efficient sympathetic cooling of Cs by Rb therein. Upon transfer to the crossed optical dipole trap condensates in excess of atoms and approximately atoms are produced after direct evaporation and gravito-magnetic tilting of the potential. The observation of six interspecies - Feshbach resonances are reported, three of which had only been predicted theoretically, allowing testing and development of the theoretical model. Furthermore, the extrapolation of this model has predicted numerous Feshbach resonances between and , none of which have been experimentally observed prior to this work. The versatile nature of this apparatus is discussed, including the application of the current system to cooling of . Initial experiments observed seven interspecies resonances, including a broad s-wave resonance at a magnetic field of G which is in excellent agreement with the theoretical prediction. Further work has revealed that fourteen Feshbach resonances exist in the 0-700 G magnetic field range between and atoms in the and states, respectively. Several of these resonances would be ideal for magneto-association of RbCs molecules, prior to transfer to the rovibrational ground-state
PiLa-CS Professional Learning Community - Workshop 2 Resources
No full textDuring the Summer of 2021 and 2022, the Participating in Literacies and Computer Science (PiLa-CS) Research Practice Partnership convened and supported a community of practice to learn more about how to enable better CS teaching for emergent bilinguals. These are materials from Workshop 2 of the PLC.Sponsored by the National Science Foundation under NSF grant CNS-1738645 and DRL-1837446. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation
Translanguaging Pedagogy in CS Ed
No full textEpisode 3: Translanguaging pedagogy in CS Education
This video looks at how multilingual students already use translanguaging in their computer science classes and discusses how CS educators can further support them with translanguaging pedagogy, a framework that prompts teachers to consider their stance, design, and shifts.
Featuring team members from Participating in Literacies and Computer Science (PiLa-CS), https://www.pila-cs.orgEpisode 3: Translanguaging pedagogy in CS Education
This video looks at how multilingual students already use translanguaging in their computer science classes and discusses how CS educators can further support them with translanguaging pedagogy, a framework that prompts teachers to consider their stance, design, and shifts.
Featuring team members from Participating in Literacies and Computer Science (PiLa-CS), https://www.pila-cs.orgSponsored by the National Science Foundation under NSF grant CNS-1738645 and DRL-1837446. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation
Production of in and decay
No full textIn the present work, we investigate the production of in and
decay, where is assigned as a molecular state. By using an effective Lagrangian
approach, we evaluate the branching ratio of
and via the triangle loop mechanism. The
estimated branching fractions of and
are an order of and ,
respectively. The ratio of these two branching fraction is estimated to be
about 5, which indicate that the may be a better process of searching and accessible for
further experimental measurement of the Belle II and LHCb collaborations.Comment: 8 pages, 3 figure
INFRARED SPECTRA OF He--CS, Ne--CS, AND Ar--CS
No full textAuthor Institution: Department of Physics and Astronomy, University of Calgary, Calgary, AB T2N; 1N4, CanadaInfrared spectra of weakly bound Rg--CS (Rg = He, Ne, and Ar) clusters formed in a pulsed supersonic slit-jet expansion have been recorded by exciting the CS fundamental band ( 1535 cm) using a tuneable diode laser. Spectra were well fitted to a conventional semi-rigid asymmetric rotor Hamiltonian. The He--CS spectrum was assigned to an a-type band, while spectra of Ne--CS and Ar--CS were well described by b-type bands, indicating a/b axis switching in transition from the He--CS complex to the Ne--CS and Ar--CS complexes. The results show that the complexes have vibrationally averged T-shaped structures. The determined structural parameters along with the observed vibrational shifts are and {\AA}, and 86.4^irc} and and cm for He--CS, Ne--CS and Ar--CS, respectively. Here, is the distance between the rare gas and the carbon atom, is the the angle between and and the CS axis and is the vibrational shift with respect to the free CS monomer
An asymptotic scaling analysis of LQ performance of an approximate adaptive control design
No full textWe consider the adaptive tracking problem for a chain of integrators, where the uncertainty is static and functional. The uncertainty is specified by L2/L∞ or weighted L2/L∞ norm bounds. We analyse a standard Lyapunov-based adaptive design which utilises a function approximator to induce a parametric uncertainty, on which the adaptive design is completed. Performance is measured by a modified LQ cost functional, penalising both the tracking error and the control effort. With such a cost functional, it is shown that a standard control design has divergent performance when the resolution of a "mono-resolution" approximator is increased. The class of "mono-resolution" approximators includes models popular in applications. A general construction of a class of approximators and their associated controllers which have a uniformly bounded performance independent of the resolution of the approximator is given
Interception and storage of wet deposited radionuclides in crops
No full textThe emission of radionuclides into the atmosphere from various sources, such as nuclear power plant accidents and nuclear bomb explosions, can result in the interception and uptake of radionuclides by crops in the agricultural ecosystem. These radionuclides e.g. radiocaesium (¹³⁴, ¹³⁷Cs) and radiostrontium (⁸⁵, 90Sr), can be transferred to foodstuffs via seeds or animal feed.
Therefore, in this thesis, the goal was to study the amount of ¹³⁴Cs and ⁸⁵Sr that have been intercepted, taken-up and redistributed to different plant parts during wet deposition at different growth stages of spring oilseed rape, spring wheat and ley. For spring oilseed rape and spring wheat, the focus was on the transfer to the seeds after wet deposition of ¹³⁴Cs and ⁸⁵Sr. The dependence between the interception of radionuclides and the growth stage, e.g. the total standing plant biomass and the leaf area index (LAI) were also studied.
There was a positive correlation between the interception of ¹³⁴Cs and ⁸⁵Sr and LAI for all three crops. A positive correlation between the standing plant interception and the biomass of ¹³⁴Cs and ⁸⁵Sr was found for spring wheat and ley, but not for spring oilseed rape. The highest interceptions of ¹³⁴Cs and ⁸⁵Sr were at shooting for spring oilseed rape, and at maturity for spring wheat. For ley, the highest interception was at the well-developed stages.
Accumulation of ¹³⁴Cs and ⁸⁵Sr in the different plant parts increased when deposition was close to harvest and the crops accumulated more ¹³⁴Cs than ⁸⁵Sr. The concentration of ⁸⁵Sr was lower in spring oilseed rape than in wheat grains. There was an indication that the distribution of radionuclides between the above ground plant parts was independent of the way that they entered into the plant after deposition of ¹³⁴Cs and ⁸⁵Sr.
The variation in transfer factors found in this thesis in comparison with results from other studies suggest, that the estimate of the risk of possible uptake to crops in the event of future deposition during the growing season, is still subject to uncertainties
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