There is strong circumstantial evidence that certain heavy, unstable atomic nuclei are 'octupole deformed', that is, distorted into a pear shape. This contrasts with the more prevalent rugby-ball ...shape of nuclei with reflection-symmetric, quadrupole deformations. The elusive octupole deformed nuclei are of importance for nuclear structure theory, and also in searches for physics beyond the standard model; any measurable electric-dipole moment (a signature of the latter) is expected to be amplified in such nuclei. Here we determine electric octupole transition strengths (a direct measure of octupole correlations) for short-lived isotopes of radon and radium. Coulomb excitation experiments were performed using accelerated beams of heavy, radioactive ions. Our data on (220)Rn and (224)Ra show clear evidence for stronger octupole deformation in the latter. The results enable discrimination between differing theoretical approaches to octupole correlations, and help to constrain suitable candidates for experimental studies of atomic electric-dipole moments that might reveal extensions to the standard model.
The dependency of the electrical safe operating area (SOA) of an integrated vertical DMOS transistor on the layout as well as on the residual epitaxial thickness of the drift region, is ...experimentally investigated using transmission line pulsing experiments. Guidelines for optimizing the SOA without compromising the other device parameters are given.
Integration of an SCR in an active clamp Reynders, K.; Moens, P.
Microelectronics and reliability,
07/2007, Letnik:
47, Številka:
7
Journal Article, Conference Proceeding
Recenzirano
This paper presents the integration of an SCR into a HV power clamp. For low currents the structure operates in “active clamp” mode and clamps the voltage to a value above the maximum operating ...voltage. After snapback the structure clamps the voltage to a low value as an SCR.
The aim of this pilot study was to evaluate the effectiveness of a Neuromotor Task Training (NTT), recently developed for the treatment of children with Developmental Coordination Disorder (DCD) by ...pediatric physical therapists in the Netherlands. NTT is a task-oriented treatment program based upon recent insights from motor control and motor learning research. Ten children with DCD (intervention group) were tested before and after 9 and 18 treatment sessions on the Movement ABC and a dysgraphia scale in order to measure the effectiveness of treatment on gross and fine motor skills in general and handwriting in particular. Five children (no-treatment control group) were tested twice with a time lag of nine weeks on the Movement ABC in order to measure spontaneous improvement. No improvement was measured for the children in the no-treatment control group, whereas a significant improvement was found for children in the intervention group for both quality of handwriting and performance on the Movement ABC after 18 treatment sessions.
Objective: To determine the effect of functional movement activities within the MOVE (Mobility Opportunities Via Education) curriculum on the independence of children with profound intellectual and ...multiple disabilities.
Subjects: Forty-four children with profound intellectual and multiple disabilities.
Setting: Centres for special education.
Design: A quasi-experimental pretest–posttest with control group design.
Intervention: The children in the control group (n = 12) participated in the regular programme at the centre of special education. The children within the experimental group (n = 32) were additionally supported by the MOVE curriculum.
Method: Both group comparisons and individual analyses were conducted.
Results: The level of independence of the experimental group increased significantly in performing movement skills; the control group did not increase significantly. At an individual level, 20 children (63%) of the experimental group improved in comparison with the control group, in which four children (33%) improved.
Conclusion: Results showed that the children receiving functionally focused activities achieved the greatest improvements in independence when performing movement activities.
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