New Experimental limit on Optical Photon Coupling to Neutral, Scalar Bosons

We report on the first results of a sensitive search for scalar coupling of photons to a light neutral boson in the mass range of approximately 1.0 milli-electron volts and coupling strength greater than 10$^-6$ GeV$^-1$ using optical photons. This was a photon regeneration experiment using the "light shining through a wall" technique in which laser light was passed through a strong magnetic field upstream of an optical beam dump; regenerated laser light was then searched for downstream of a second magnetic field region optically shielded from the former. Our results show no evidence for scalar coupling in this region of parameter space.Comment: pdf-file, 10 pages, 4 figures, submitted to Physical Review Letter

Salary Negotiation among Dietetics Professionals: Lived Experiences and a Three-Pronged Approach to Advancing Negotiation Skills and Confidence

There is a lack of tools and training to assist in salary and benefit (S&B) negotiations within the nutrition profession. This study is the first to analyze thoughts, feelings, and experiences with S&B negotiations among nutrition and dietetics professionals. The 32-item, web-based, cross-sectional survey study was completed by English-speaking individuals of any gender who identified as a “nutrition and dietetics professional,” were 18 years of age or older in the United States or US Territory. Participant demographics, experience, confidence, and success with negotiation of S&B, value of negotiation, and interest in learning more were the primary outcome measures determined before data collection. Means, standard deviations, and ranges were calculated for ordinal data with frequencies on nominal data. ANOVAs were conducted to evaluate relationships between demographics and negotiation. Participants (N = 1239) were mostly white (90.2%), female (94.5%), registered dietitian (RD) (96.8%) members of the Academy of Nutrition and Dietetics (96.1%). Clinical practitioners accounted for the largest practice area (38.5%). Non-RD professionals had a significantly higher mean for experience with negotiation than RD’s, DTR’s and participants eligible for the RD exam (P = 0.008) and had higher confidence (P = 0.001). Clinical dietitians had significantly lower satisfaction with current salary (P \u3c 0.001) and experience (P \u3c 0.001), confidence (P \u3c 0.001), and success (P \u3c 0.001) with negotiation but had significantly higher interest in advancing negotiation skills (P = 0.017) than all other practice areas. Early education, exposure, and empowerment are key factors in improving the negotiation experience that begins in the undergraduate experience and continues well into professional practice

A Process and Outcome Evaluation of a Shelter for Homeless Young Women

To evaluate the processes and outcomes of a short-term shelter, both quantitative and qualitative data were gathered via participant observation, focus group interviews with shelter staff and residents, and individual interviews with a sample of 40 young women who had been homeless prior to using the shelter. The process evaluation showed that the shelter staff strived to utilize an empowerment philosophy in their relationships with residents, but that there were many challenges to implementing this philosophy. The outcome evaluation showed that, at a 3-month follow-up, the participants reported significant improvements in housing, income, independence, and life satisfaction, but most continued to experience poverty and a number of other difficulties. The results were discussed in terms of the implications for future research and the value and limitations of shelters for dealing with homeless youth. The need for more sustained and comprehensive program interventions and supportive social policies was underscored

Assessment of Factors Involved in Non-Adherence to Infant Hearing Diagnostic Testing

Abstract Introduction: Delayed diagnosis of pediatric hearing loss can cause delays in cognitive and social development. This study described the sociodemographic factors associated with delayed timing of a final hearing diagnosis after an abnormal newborn hearing screening (NBHS). Methods: Parent-infant dyads were recruited after being referred for further audiologic testing on an abnormal result from the NBHS. Results: Of the 53 participants, 55% (n=29) did not receive a final diagnosis by the recommended 3 months of age. Of those with a delayed diagnosis, 45% (n=13) had their first appointment within 3 months, but a delay was caused by an inconclusive or abnormal auditory brainstem response (ABR), middle ear pathology, or the presence of risk factors requiring additional testing. In a univariate analysis, older parental age (OR: 0.90, 95% CI: [0.82, 0.99]) and more total children in the household ([OR: 0.66, 95% CI: {0.18, 2.49}] for 1 child vs. 2 and [OR: 0.14, 95% CI: {0.03, 0.69}] for 1 children vs. 3 or more) were shown to were shown to significantly increase the odds of a delayed diagnosis, whereas younger infant age at first appointment (OR: 0.95, 95% CI: [0.92, 0.99]) was shown to significantly decrease the odds of a delayed diagnosis. In multivariate analyses, delayed diagnosis was also decreased by younger infant age at the initial appointment (OR=0.94, 95% CI: [0.90, 0.99]). Conclusions: Parental age, number of total children in the household, and timing of first appointment may predict delayed diagnosis. Because many patients with a delayed diagnosis attended an appointment within 3 months, further standardization of the process and targeted interventions for families could improve chances of achieving a diagnosis within the first appointment

Microvolt T-Wave Alternans and the Risk of Death or Sustained Ventricular Arrhythmias in Patients With Left Ventricular Dysfunction

ObjectivesThis study hypothesized that microvolt T-wave alternans (MTWA) improves selection of patients for implantable cardioverter-defibrillator (ICD) prophylaxis, especially by identifying patients who are not likely to benefit.BackgroundMany patients with left ventricular dysfunction are now eligible for prophylactic ICDs, but most eligible patients do not benefit; MTWA testing has been proposed to improve patient selection.MethodsOur study was conducted at 11 clinical centers in the U.S. Patients were eligible if they had a left ventricular ejection fraction (LVEF) ≤0.40 and lacked a history of sustained ventricular arrhythmias; patients were excluded for atrial fibrillation, unstable coronary artery disease, or New York Heart Association functional class IV heart failure. Participants underwent an MTWA test and then were followed for about two years. The primary outcome was all-cause mortality or non-fatal sustained ventricular arrhythmias.ResultsIschemic heart disease was present in 49%, mean LVEF was 0.25, and 66% had an abnormal MTWA test. During 20 ± 6 months of follow-up, 51 end points (40 deaths and 11 non-fatal sustained ventricular arrhythmias) occurred. Comparing patients with normal and abnormal MTWA tests, the hazard ratio for the primary end point was 6.5 at two years (95% confidence interval 2.4 to 18.1, p < 0.001). Survival of patients with normal MTWA tests was 97.5% at two years. The strong association between MTWA and the primary end point was similar in all subgroups tested.ConclusionsAmong patients with heart disease and LVEF ≤0.40, MTWA can identify not only a high-risk group, but also a low-risk group unlikely to benefit from ICD prophylaxis

A fabrication process for integrating polysilicon microstructures with post-processed CMOS circuits

A MEMS-first fabrication process for integrating CMOS circuits with polysilicon micromechanical structures is described in detail. The overall process uses 18 masks (22 lithography steps) to merge a p-well LOCOS CMOS process that has one metal and two polysilicon layers with a surface micromachining process that has three layers of polysilicon. The microstructures are formed within recesses on the surface of silicon wafers such that their uppermost surfaces are coplanar with the remainder of the substrate. No special planarization technique, such as chemical-mechanical polishing, is used in the work described here. Special aspects of the process include provisions to improve lithography within the recesses, to protect the microstructures during the circuit fabrication, and to implement an effective lead transfer between the microstructures and the on-chip circuitry. The process is validated using a test vehicle that includes accelerometers and gyroscopes interfaced with sensing circuits. Measured transistor parameters match those obtained in standard CMOS, with NMOS and PMOS thresholds at 0.76 V and -0.96 V, respectively.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/49027/2/jm0312.pd

Threshold meson production and cosmic ray transport

An interesting accident of nature is that the peak of the cosmic ray spectrum, for both protons and heavier nuclei, occurs near the pion production threshold. The Boltzmann transport equation contains a term which is the cosmic ray flux multiplied by the cross section. Therefore when considering pion and kaon production from proton-proton reactions, small cross sections at low energy can be as important as larger cross sections at higher energy. This is also true for subthreshold kaon production in nuclear collisions, but not for subthreshold pion production.Comment: 9 pages, 1 figur

Recycling bins, garbage cans or think tanks? Three myths regarding policy analysis institutes

The phrase 'think tank' has become ubiquitous – overworked and underspecified – in the political lexicon. It is entrenched in scholarly discussions of public policy as well as in the 'policy wonk' of journalists, lobbyists and spin-doctors. This does not mean that there is an agreed definition of think tank or consensual understanding of their roles and functions. Nevertheless, the majority of organizations with this label undertake policy research of some kind. The idea of think tanks as a research communication 'bridge' presupposes that there are discernible boundaries between (social) science and policy. This paper will investigate some of these boundaries. The frontiers are not only organizational and legal; they also exist in how the 'public interest' is conceived by these bodies and their financiers. Moreover, the social interactions and exchanges involved in 'bridging', themselves muddy the conception of 'boundary', allowing for analysis to go beyond the dualism imposed in seeing science on one side of the bridge, and the state on the other, to address the complex relations between experts and public policy