Findings from a Pilot Light-Emitting Diode (LED) Bulb Exchange Program at a Neighborhood Scale

In the United States, 44% of low-income households struggle to pay their utility bills, affecting their ability to afford necessities such as food and health expenses. There is a high demand for, but low availability of, energy efficiency services in underserved neighborhoods, creating an opportunity for community-based programs to fill this inherent gap. This pilot project aims to bring energy savings and education to a uniquely targeted portion of Salt Lake City, UT, through the exchange of light-emitting diode bulbs and examines its feasibility in addressing energy insecurity at larger scales. Through the 8-month project duration, 1432 bulbs were exchanged at 23 events reaching 181 households in low-income areas that, through a year of use, were estimated to save residents approximately $18,219 in electricity bills, reducing CO2 emissions from power plants by 122 metric tons. Since this pilot reached less than 1% of households, we extrapolated a reach of 2%, 5%, and 7.5%, and found substantial potential decreases in power plant emissions and financial savings. Ongoing expansion efforts include more direct engagement with trusted members of the targeted communities and stronger attempts to engage participants in energy efficiency education as our project encountered some difficulties in reaching the intended population

Phonation Instability Flow in Excised Canine Larynges

Objective. Disordered voices are often associated with abnormal changes in aerodynamic parameters of subglottal pressure (P-s) and airflow. Phonation instability pressure (PIP) has been previously proposed to evaluate P-s at the onset of chaotic phonation. We propose the concept of and measure phonation instability flow (PIF), the airflow at which phonation becomes chaotic. Phonation flow range (PFR), PIF minus phonation threshold flow (PTF), is proposed to assess the range over which normal vocal fold vibration occurs. Study Design. Repeated measures with each ex vivo larynx serving as its own control. Methods. Pressure and airflow were measured at phonation onset and chaos onset in seven excised canine larynges under three experimental conditions: 0% elongation with no glottal gap; 20% elongation with no glottal gap; 20% elongation with a 3-mm posterior glottal gap. Paired t tests were performed to determine if experimental measurements differed between elongations (0% and 20%) or degrees of abduction (20% elongation with and without a 3-mm glottal gap). Results. Both PIF and PFR were dependent on abduction but not elongation. PIP was not significantly dependent on either condition. PIF and PFR showed greater differences for abduction than either phonation threshold pressure (PTP) or PTF. Conclusions. PIF and PFR may be useful parameters in the experimental or clinical settings, particularly when evaluating disorders characterized by a glottal gap, such as vocal fold paralysis and presbylaryngis.NIH from the National Institute on Deafness and other Communicative Disorders [R01 DC008153, R01 DC05522

Spatiotemporal analysis of normal and pathological human vocal fold vibrations

National Institutes of Health from the National Institute on Deafness and Other Communication Disorders [R01 DC008850]Purpose: For spatiotemporal analysis to become a relevant clinical tool, it must be applied to human vocal fold vibration. Receiver operating characteristic (ROC) analysis will help assess the ability of spatiotemporal parameters to detect pathological vibration. Materials and Methods: Spatiotemporal parameters of correlation length and entropy were extracted from high-speed videos of 124 subjects, 67 without vocal fold pathology and 57 with either vocal fold polyps or nodules. Mann-Whitney rank sum tests were performed to compare normal vocal fold vibrations to pathological vibrations, and ROC analysis was used to assess the diagnostic value of spatiotemporal analysis. Results: A statistically significant difference was found between the normal and pathological groups in both correlation length (P < .001) and entropy (P < .001). The ROC analysis showed an area under the curve of 0.85 for correlation length, 0.87 for entropy, and 0.92 when the 2 parameters were combined. A statistically significant difference was not found between the nodules and polyps groups in either correlation length (P = .227) or entropy (P = .943). The ROC analysis showed an area under the curve of 0.63 for correlation length and 0.51 for entropy. Conclusions: Although they could not effectively distinguish vibration of vocal folds with nodules from those with polyps, the spatiotemporal parameters correlation length and entropy exhibit the ability to differentiate normal and pathological vocal fold vibration and may represent a diagnostic tool for objectively detecting abnormal vibration in the future, especially in neurological voice disorders and vocal folds without a visible lesion. (c) 2012 Elsevier Inc. All rights reserved

Complimentary weightism: The potential costs of appearance-related commentary for women’s self-objectification

Little is known about the effects of receiving compliments about appearance. An ethnically diverse sample of 220 college women completed self-report measures of appearance commentary, trait self-objectification, body surveillance, and body dissatisfaction. Results indicated that the impact of appearance criticisms and compliments, but not their frequency, predicted higher body surveillance and more body dissatisfaction. Moderated mediation analyses indicated that increased body surveillance partially explained the relationship between feelings about appearance comments and body dissatisfaction and that this effect was moderated by level of trait self-objectification. Higher self-objectifying women reported higher levels of body surveillance and more body dissatisfaction regardless of whether they felt positively or negatively about the appearance comments, whereas lower self-objectifying women were less stable in their reports. Importantly, all women reported higher body surveillance and more body dissatisfaction in association with feeling good about receiving appearance compliments, which supports the idea of complimentary weightism, whereby appearance compliments represent a seemingly innocuous type of interpersonal feedback that may have detrimental consequences for women\u27s self-objectification and body image