375 research outputs found
A Versatile Pseudo-Random Noise Generator
A detailed design is presented for a digital pseudo-random noise generator. The instrument is built with standard integrated circuits. It produces both binary noise (pseudo-random binary sequences) and white Gaussian noise of variable bandwidth. By setting front panel switches to match tabulated octal codes, one may select a vast number of independent noise programs
Strong polarization mode coupling in microresonators
We observe strong modal coupling between the TE00 and TM00 modes in Si3N4
ring resonators revealed by avoided crossings of the corresponding resonances.
Such couplings result in significant shifts of the resonance frequencies over a
wide range around the crossing points. This leads to an effective dispersion
that is one order of magnitude larger than the intrinsic dispersion and creates
broad windows of anomalous dispersion. We also observe the changes to frequency
comb spectra generated in Si3N4 microresonators due polarization mode and
higher-order mode crossings and suggest approaches to avoid these effects.
Alternatively, such polarization mode-crossings can be used as a novel tool for
dispersion engineering in microresonators.Comment: Comments are very welcome (send to corresponding author
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Object Augmentation for the Visually Impaired Using RP
We demonstrate the application of rapid prototyping technology to augment every-day objects for
the visually impaired. A freeform fabricator was used to print a tactile alphabet on multiple
surfaces including paper, plastic, and metal. We have identified and experimented with multiple
non-toxic materials and analyzed the dimensional tolerance, repeatability, and adhesion
characteristics on multiple surfaces. Printing time for 1x1cm embossed letters varied from 14 to 52
seconds. More broadly, these experiments open the door to RP applications that involve custom
product adaptation to address disabilities.Mechanical Engineerin
Translating Research Into Practice: Speeding the Adoption of Innovative Health Care Programs
Looks at case studies of four innovative clinical programs to determine key factors influencing the diffusion and adoption of innovations in health care
Waveguide-based single-shot temporal cross-correlator
We describe a novel technique for performing a single-shot optical
cross-correlation in nanowaveguides. Our scheme is based on four-wave mixing
between two orthogonally polarized input signals propagating with different
velocities due to polarization mode dispersion. The cross-correlation is
determined by measuring the spectrum of the idler wave generated by the
four-wave mixing process.Comment: 7 pages, 6 figures, Submitted to Optics Expres
Measuring recall of medical information in non-English-speaking people with cancer: A methodology
Background
Many patients who require an interpreter have difficulty remembering information from their medical consultations. Memory aids such as consultation audio-recordings may be of benefit to these patients. However, there is no established means of measuring patients’ memory of medical information.
Objectives
This study aimed to develop a method for eliciting and coding recall of medical information in non-English-speaking patients.
Design
This method, called Patient-Interpreter-Clinician coding (PICcode), was developed in the context of a phase II trial conducted in two outpatient oncology clinics in Melbourne, Australia, and was refined iteratively through consultation with an expert panel and piloting. Between-coder differences in early versions of the coding system were resolved through discussion and consensus resulting in refinements to PICcode.
Results
The final version of PICcode involved transcribing, translating and coding of audio-recorded consultations and semi-structured interviews (SSI). The SSIs were designed to elicit patients’ free-recall of medical information. Every unit of medical information in the consultation was identified and categorized in a coding tree. SSIs were coded to identify the extent to which information was recalled from the consultation.
Discussion
The iterative changes involved in developing PICcode assisted in clarifying precise details of the process and produced a widely applicable coding system. PICcode is the most comprehensively described method of determining the amount of information that patients who use an interpreter recall from their medical consultations. PICcode can be adapted for English-speaking patients and other healthcare populations
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