7,467 research outputs found
Effective integration of 360 degree feedback into the coaching process
This practical paper is based on a skills session as delivered at the BPS Special Group in Coaching Psychology Conference held 2007 in London. The first part of our paper provides a review of the extant research evidence on 360 degree feedback at with focus on effects on individual development, making explicit links to the implications for coaching practice throughout. We conclude that 360 degree feedback is primarily effective when conceptualised and utilised as a finely grained means of instigating individual behaviour change and learning on job relevant attributes and facilitated by a skilled feedback giver. This provides a clear rationale for its use in coaching. We outline how an actual profile can be used as part of a coaching session, using the Saville Work Wave Ā® Performance 360 as an example
The Alzheimer variant of Lewy body disease: A pathologically confirmed case-control study
The objective of the study was to identify clinical features that distinguish patients with dementia with Lewy bodies (DLB), who were classified as Alzheimer's disease ( AD) patients, from patients with AD. We examined a group of 27 patients from our memory clinic, originally diagnosed with AD, of whom 6 were postmortem found to have DLB. For the present study, we compared cognitive, noncognitive and neurological symptoms between the two groups. We found that there were no differences on ratings of dementia and scales for activities of daily living. Patients with DLB performed better on the MMSE and the memory subtest of the CAMCOG, but there was no difference in any other cognitive domain. Furthermore, genetic risk factors, including family history of dementia or allele frequency of the apolipoprotein epsilon 4, did not discriminate between the two groups, and there were no differences on CCT scans. Taken together, our findings suggest that Lewy body pathology may be present in patients who do not show the typical clinical features which distinguish DLB from AD. Copyright (C) 2005 S. Karger AG, Basel
Vector chiral order in frustrated spin chains
By means of a numerical analysis using a non-Abelian symmetry realization of
the density matrix renormalization group, we study the behavior of vector
chirality correlations in isotropic frustrated chains of spin S=1 and S=1/2,
subject to a strong external magnetic field. It is shown that the field induces
a phase with spontaneously broken chiral symmetry, in line with earlier
theoretical predictions. We present results on the field dependence of the
order parameter and the critical exponents.Comment: 8 pages, 9 figure
Hyperfine and Optical Barium Ion Qubits
State preparation, qubit rotation, and high fidelity readout are demonstrated
for two separate \baseven qubit types. First, an optical qubit on the narrow
6S to 5D transition at 1.76 m is implemented. Then,
leveraging the techniques developed there for readout, a ground state hyperfine
qubit using the magnetically insensitive transition at 8 GHz is accomplished
Efficient fluorescence collection from trapped ions with an integrated spherical mirror
Efficient collection of fluorescence from trapped ions is crucial for quantum
optics and quantum computing applications, specifically, for qubit state
detection and in generating single photons for ion-photon and remote ion
entanglement. In a typical setup, only a few per cent of ion fluorescence is
intercepted by the aperture of the imaging optics. We employ a simple metallic
spherical mirror integrated with a linear Paul ion trap to achieve photon
collection efficiency of at least 10% from a single Ba ion. An aspheric
corrector is used to reduce the aberrations caused by the mirror and achieve
high image quality.Comment: 5 pages and 4 figure
Precision measurement of the branching ratio in the 6P3/2 decay of BaII with a single trapped ion
We present a measurement of the branching ratios from the 6P3/2 state of BaII
into all dipoleallowed decay channels (6S1/2, 5D3/2 and 5D5/2). Measurements
were performed on single 138Ba+ ions in a linear Paul trap with a
frequency-doubled mode-locked Ti:Sapphire laser resonant with the 6S1/2->6P3/2
transition at 455 nm by detection of electron shelving into the dark 5D5/2
state. By driving a pi Rabi rotation with a single femtosecond pulse, a
absolute measurement of the branching ratio to 5D5/2 state was performed.
Combined with a measurement of the relative decay rates into 5D3/2 and 5D5/2
states performed with long trains of highly attenuated 455 nm pulses, it
allowed the extraction of the absolute ratios of the other two decays. Relative
strengths normalized to unity are found to be 0.756+/-0.046, 0.0290+/-0.0015
and 0.215+/-0.0064 for 6S1/2, 5D3/2 and 5D5/2 respectively. This approximately
constitutes a threefold improvement over the best previous measurements and is
a sufficient level of precision to compare to calculated values for dipole
matrix elements.Comment: 6 pages, 5 figures, 1 tabl
Microstructural characterization of AISI 431 martensitic stainless steel laser-deposited coatings
High cooling rates during laser cladding of stainless steels may alter the microstructure and phase constitution of the claddings and consequently change their functional properties. In this research, solidification structures and solid state phase transformation products in single and multi layer AISI 431 martensitic stainless steel coatings deposited by laser cladding at different processing speeds are investigated by optical microscopy, Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), orientation imaging microscopy (OIM), ternary phase diagram, Schaeffler and TTT diagrams. The results of this study show how partitionless solidification and higher solidification rates alter the microstructure and phase constitution of martensitic stainless steel laser deposited coatings. In addition, it is shown that while different cladding speeds have no effect on austeniteāmartensite orientation relationship in the coatings, increasing the cladding speed has resulted in a reduction of hardness in deposited coatings which is in contrast to the common idea about obtaining higher hardness values at higher cladding speeds.
Trapped Ion Imaging with a High Numerical Aperture Spherical Mirror
Efficient collection and analysis of trapped ion qubit fluorescence is
essential for robust qubit state detection in trapped ion quantum computing
schemes. We discuss simple techniques of improving photon collection efficiency
using high numerical aperture (N.A.) reflective optics. To test these
techniques we placed a spherical mirror with an effective N.A. of about 0.9
inside a vacuum chamber in the vicinity of a linear Paul trap. We demonstrate
stable and reliable trapping of single barium ions, in excellent agreement with
our simulations of the electric field in this setup. While a large N.A.
spherical mirror introduces significant spherical aberration, the ion image
quality can be greatly improved by a specially designed aspheric corrector lens
located outside the vacuum system. Our simulations show that the spherical
mirror/corrector design is an easy and cost-effective way to achieve high
photon collection rates when compared to a more sophisticated parabolic mirror
setup.Comment: 5 figure
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