3,377 research outputs found
Peningkatan Kemampuan Guru IPS SMP Wilayah Binaan Kota Semarang Dalam Mengembangkan Indikator Dan Instrumen Penilaian Melalui Workshop Dengan Pertemuan Individual Pada Semester 2 Tahun Pelajaran 2014/2015
The research problem is the minimum ability of social studies teachers to develop the indicators of competencies and assessment instruments achievement. This study aims to improve the ability of social studies teachers to develop the indicators of achievement of competencies and assessment instruments through workshops and individual meetings.Determining the teachers'ability to develop the competencies achievement indicators,indicator scorecards were used which contains 8 aspects, whereas to determine the ability to develop assessment study instruments,the card consists of three aspects which contains 11sub aspectswere used.Workshops with individual meetings were taken to improve the teachers'ability. Workshop selected as an activity that integrates theory and practice as well as to meet the characteristics of adult learning, while the individual meeting were used to solve the problem of an individual nature and eliminate the psychological barriers of teachers who feel embarrassed to revealed problems in the workshop forum.Before the action was carried out, the number of teachers who are able to develop competence achievement indicator is 0%, after cycle 1 = 13.33% and after cycle 2 = 100%. Teachers whowere able to compile an assessment instrument before action is taken, is 6.67%, after the first cycle=60%, after 2 cycles to 100%
Fostering Broad Oral Language Skills in Preschoolers from Low SES Background
Socioeconomic disparities increase the probability that children will enter school behind their more advantaged peers. Early intervention on language skills may enhance language and literacy outcomes, reduce the gap and, eventually, promote school readiness of low-SES (Socioeconomic Status) children. This study aimed to analyze the feasibility and effectiveness of a brief narrative-based intervention (treatment vs. control group) aimed to foster broad oral language skills in preschoolers (N = 69; Mean age = 5.5, SD = 4 months) coming from low-SES families. Moreover, it was analyzed whether children's initial vocabulary mediates the intervention's responsiveness. Results have shown that children in treatment group obtained greater gains than children in control group in almost all intervention-based measures. There is also some evidence for the generalizability of the intervention to other skills not directly trained during the intervention. Moreover, it was found that children's initial vocabulary mediates the intervention's responsiveness showing that children with high vocabulary made greater gains in higher-level components of language comprehension, whereas children with low vocabulary made higher gains in vocabulary. Taken together, our findings suggest that a relatively brief, but quite intensive narrative-based intervention, may produce improvements on broad oral language skills in preschoolers from low-SES backgrounds
Fostering Broad Oral Language Skills in Preschoolers from Low SES Background
Socioeconomic disparities increase the probability that children will enter school behind
their more advantaged peers. Early intervention on language skills may enhance language and literacy
outcomes, reduce the gap and, eventually, promote school readiness of low-SES (Socioeconomic
Status) children. This study aimed to analyze the feasibility and eectiveness of a brief narrative-based
intervention (treatment vs. control group) aimed to foster broad oral language skills in preschoolers
(N = 69; Mean age = 5.5, SD = 4 months) coming from low-SES families. Moreover, it was analyzed
whether children’s initial vocabulary mediates the intervention’s responsiveness. Results have
shown that children in treatment group obtained greater gains than children in control group in
almost all intervention-based measures. There is also some evidence for the generalizability of the
intervention to other skills not directly trained during the intervention. Moreover, it was found that
children’s initial vocabulary mediates the intervention’s responsiveness showing that children with
high vocabulary made greater gains in higher-level components of language comprehension, whereas
children with low vocabulary made higher gains in vocabulary. Taken together, our findings suggest
that a relatively brief, but quite intensive narrative-based intervention, may produce improvements
on broad oral language skills in preschoolers from low-SES backgrounds
High resolution spectroscopy of single NV defects coupled with nearby C nuclear spins in diamond
We report a systematic study of the hyperfine interaction between the
electron spin of a single nitrogen-vacancy (NV) defect in diamond and nearby
C nuclear spins, by using pulsed electron spin resonance spectroscopy.
We isolate a set of discrete values of the hyperfine coupling strength ranging
from 14 MHz to 400 kHz and corresponding to C nuclear spins placed at
different lattice sites of the diamond matrix. For each lattice site, the
hyperfine interaction is further investigated through nuclear spin polarization
measurements and by studying the magnetic field dependence of the hyperfine
splitting. This work provides informations that are relevant for the
development of nuclear-spin based quantum register in diamond.Comment: 8 pages, 5 figure
Understanding the saturation power of Josephson Parametric Amplifiers made from SQUIDs arrays
We report on the implementation and detailed modelling of a Josephson
Parametric Amplifier (JPA) made from an array of eighty Superconducting QUantum
Interference Devices (SQUIDs), forming a non-linear quarter-wave resonator.
This device was fabricated using a very simple single step fabrication process.
It shows a large bandwidth (45 MHz), an operating frequency tunable between 5.9
GHz and 6.8 GHz and a large input saturation power (-117 dBm) when biased to
obtain 20 dB of gain. Despite the length of the SQUID array being comparable to
the wavelength, we present a model based on an effective non-linear LC series
resonator that quantitatively describes these figures of merit without fitting
parameters. Our work illustrates the advantage of using array-based JPA since a
single-SQUID device showing the same bandwidth and resonant frequency would
display a saturation power 15 dB lower.Comment: 12 pages, 9 figures, Appendices include
Turbulent drag on a low-frequency vibrating grid in superfluid He-4 at very low temperatures
We present measurements of the dissipative turbulent drag on a vibrating grid in superfluid He-4 over a wide range of (low) frequencies. At high velocities, the dissipative drag is independent of frequency and is approximately the same as that measured in normal liquid He-4. We present measurements on a similar grid in superfluid He-3-B at low temperatures which shows an almost identical turbulent drag coefficient at low frequencies. However, the turbulent drag in He-3-B is substantially higher at higher frequencies. We also present measurements of the inertial drag coefficient for grid turbulence in He-4. The inertial drag coefficient is significantly reduced by turbulence in both superfluid and normal liquid He-4
Kerr non-linearity in a superconducting Josephson metamaterial
We present a detailed experimental and theoretical analysis of the dispersion
and non-linear Kerr frequency shifts of plasma modes in a one-dimensional
Josephson junction chain containing 500 SQUIDs in the regime of weak
nonlinearity. The measured low-power dispersion curve agrees perfectly with the
theoretical model if we take into account the Kerr renormalisation of the bare
frequencies and the long-range nature of the island charge screening by a
remote ground plane. We measured the self- and cross-Kerr shifts for the
frequencies of the eight lowest modes in the chain. We compare the measured
Kerr coefficients with theory and find good agreement
Direct Measurement of the Photon Statistics of a Triggered Single Photon Source
We studied intensity fluctuations of a single photon source relying on the
pulsed excitation of the fluorescence of a single molecule at room temperature.
We directly measured the Mandel parameter Q(T) over 4 orders of magnitude of
observation timescale T, by recording every photocount. On timescale of a few
excitation periods, subpoissonian statistics is clearly observed and the
probablility of two-photons events is 10 times smaller than Poissonian pulses.
On longer times, blinking in the fluorescence, due to the molecular triplet
state, produces an excess of noise.Comment: 4 pages, 3 figures, 1 table submitted to Physical Review Letter
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