Experimental evaluation of thermal energy storage

The technical performance of commercially available thermal energy storage (TES) residential heating units under severe weather conditions is discussed. The benefits and costs of TES to the user and utility companies were assessed. The TES issues, research and development needs, and barriers to commercialization were identified. The field tests which determined the performance characteristics for the TES are described and the TES systems, which included both ceramic and hydronic systems, are compared

Overview of the 2005 cross-language image retrieval track (ImageCLEF)

The purpose of this paper is to outline efforts from the 2005 CLEF crosslanguage image retrieval campaign (ImageCLEF). The aim of this CLEF track is to explore the use of both text and content-based retrieval methods for cross-language image retrieval. Four tasks were offered in the ImageCLEF track: a ad-hoc retrieval from an historic photographic collection, ad-hoc retrieval from a medical collection, an automatic image annotation task, and a user-centered (interactive) evaluation task that is explained in the iCLEF summary. 24 research groups from a variety of backgrounds and nationalities (14 countries) participated in ImageCLEF. In this paper we describe the ImageCLEF tasks, submissions from participating groups and summarise the main fndings

It\u27s quite good fun: A qualitative study of a singing/songwriting programme for people with Parkinson\u27s disease and their spouses

Background: : Group singing for people with Parkinson\u27s disease (PD) is an established intervention not only to improve voice and speech difficulties but also for emotional and social benefit. Less is known about the experiences of group singing on the couple—the person with PD and their spouse or partner together—and studies have not specifically tracked impact through time or in combination with songwriting. Aims: : To understand the impact of group singing/songwriting on couples (participants with PD and their spouses) to unpack whether this broader view might help explain why such interventions are reported as beneficial. Using a trajectory approach, a form of longitudinal research and focused ethnography, the research sought a deeper appreciation of participation through time for the couple in a singing/songwriting group. Methods & Procedures: : Four couples attending a singing/songwriting programme were observed for 10 weeks, and interviewed formally and informally weekly. Data were analysed thematically across-case through framework analysis but also within-case to explore the couples’ experiences and narratives over time. Outcomes & Results: : The theme of ‘improved relationships’ between the couples was new and extended previous studies’ findings of positivity, physical benefit, sense of self and social opportunity. The stories of each couple highlighted the importance of musical reminiscence and emotional respite, and demonstrated changes with time through the singing and songwriting group. Conclusions & Implications: : The benefits of offering singing/songwriting groups may be felt not only by participants with PD but also by their spouses/partners even if they choose not to attend themselves. Such benefits may include improved relationships related to the shared joy of music, musical reminiscence and emotional respite. The addition of songwriting encourages creativity and agency. A longitudinal trajectory approach is one way to appreciate how these benefits may unfold over time for participants. WHAT THIS PAPER ADDS: What is already known on the subject Group singing for people with PD has been shown to have physical, emotional and social benefits as measured on mainly pre-post-assessments of vocal, speech, respiratory function and quality of life questionnaires. What this study adds to the existing knowledge This study adds three new aspects: studying the benefits for the couple (both people with PD and their spouse/partner); taking an in-depth focused ethnographic approach over time to collect couples’ narratives and experiences; and exploring the potential for adding songwriting to the intervention. What are the potential or actual clinical implications of this work? A qualitative trajectory approach may help clinicians understand why such interventions are experienced as beneficial. Clinicians running singing groups for people with PD should offer attendance to spouses/partners because of the potential for such groups to improve relationships and build new points of connection for the couple, as well as provide peer support for spouses. Songwriting is a useful addition for creativity, cognitive flexibility and self-expression

Hybrid mode-scattering/sound-absorbing segmented liner system and method

A hybrid mode-scattering/sound-absorbing segmented liner system and method in which an initial sound field within a duct is steered or scattered into higher-order modes in a first mode-scattering segment such that it is more readily and effectively absorbed in a second sound-absorbing segment. The mode-scattering segment is preferably a series of active control components positioned along the annulus of the duct, each of which includes a controller and a resonator into which a piezoelectric transducer generates the steering noise. The sound-absorbing segment is positioned acoustically downstream of the mode-scattering segment, and preferably comprises a honeycomb-backed passive acoustic liner. The invention is particularly adapted for use in turbofan engines, both in the inlet and exhaust

Drag coefficients of microscopic spheres in free-molecule flow

Drag coefficients of microscopic spheres in free molecule flo

Risk factors for COPD exacerbations in inhaled medication users: the COPDGene study biannual longitudinal follow-up prospective cohort.

BackgroundDespite inhaled medications that decrease exacerbation risk, some COPD patients experience frequent exacerbations. We determined prospective risk factors for exacerbations among subjects in the COPDGene Study taking inhaled medications.Methods2113 COPD subjects were categorized into four medication use patterns: triple therapy with tiotropium (TIO) plus long-acting beta-agonist/inhaled-corticosteroid (ICS ± LABA), tiotropium alone, ICS ± LABA, and short-acting bronchodilators. Self-reported exacerbations were recorded in telephone and web-based longitudinal follow-up surveys. Associations with exacerbations were determined within each medication group using four separate logistic regression models. A head-to-head analysis compared exacerbation risk among subjects using tiotropium vs. ICS ± LABA.ResultsIn separate logistic regression models, the presence of gastroesophageal reflux, female gender, and higher scores on the St. George's Respiratory Questionnaire were significant predictors of exacerbator status within multiple medication groups (reflux: OR 1.62-2.75; female gender: OR 1.53 - OR 1.90; SGRQ: OR 1.02-1.03). Subjects taking either ICS ± LABA or tiotropium had similar baseline characteristics, allowing comparison between these two groups. In the head-to-head comparison, tiotropium users showed a trend towards lower rates of exacerbations (OR = 0.69 [95 % CI 0.45, 1.06], p = 0.09) compared with ICS ± LABA users, especially in subjects without comorbid asthma (OR = 0.56 [95% CI 0.31, 1.00], p = 0.05).ConclusionsEach common COPD medication usage group showed unique risk factor patterns associated with increased risk of exacerbations, which may help clinicians identify subjects at risk. Compared to similar subjects using ICS ± LABA, those taking tiotropium showed a trend towards reduced exacerbation risk, especially in subjects without asthma.Trial registrationClinicalTrials.gov NCT00608764, first received 1/28/2008

The impact of stuttering on development of self-identity, relationships, and quality of life in women who stutter

Purpose: The experiences of women who stutter have been underresearched. Clinicians have little guidance from the research literature on issues specific to women who stutter and are likely to have less clinical contact with this group than with men who stutter because of the higher prevalence of stuttering in men. This study explored the experiences of a small group of women who stutter with a particular focus on what the main current issues are and how gender may have influenced experiences with stuttering. Method: This qualitative study involved recruitment of 9 women who stutter (aged 35-80 years) through a support network of people who stutter in Western Australia. All the women had received some form of speech therapy for stuttering, and they came from diverse cultural backgrounds. Individual, semistructured interviews were conducted, recorded, and transcribed verbatim. Data were managed with NVivo 10, and thematic analysis was used to identify recurring themes across the data. Data were coded independently by the researchers and refined through group discussion. Participants also completed the Overall Assessment of the Speaker\u27s Experience of Stuttering. Results: A core theme of gendered sense of self in society emerged from the data. This related to 3 broad themes: perceptions of self that were primarily negative, the impact of stuttering on relationships and social connection with others (relationships with family, peers, colleagues, and intimate partners), and the management of stuttering (internal coping, motivations, and experiences with external support). Conclusions: Stuttering has a pervasive impact on all aspects of women\u27s lives and affects how they view themselves, their relationships, their career potential, and their perceptions of how others view them in society. The women interviewed in this study often had negative self-perceptions and felt that their quality of life had been impacted by their stuttering. However, the women\u27s stories and experiences of stuttering were shaped by a broader context of perceived sociocultural expectations of females in society. Strong verbal communication was highlighted as a crucial factor in developing identity and forming relationships. This study highlights the need to be aware of the experiences of, and issues facing, women who stutter for clinicians to be more equipped, focused, and successful in their stuttering interventions for women

Can Private Equity Investments Succeed Without Innovation? Strategic Decision Guidelines To Enhance Business Acquisition Performance

There is sufficient evidence that many private equity (PE) leveraged buyouts (LBOs) fail financially and during this process, destroy significant value for their investors, employees, partners, suppliers, customers, and the economy in the communities in which these businesses operate. PE firms acquire companies and manage them for a short time-period, typically under 7 years, for the purpose of selling them at a higher price and with a high return on investment (ROI). The capital structure of such an acquisition is shaped as an LBO via an investment mix of 20-30 percent in equity and 70-80 percent in debt, which forces the LBO to assume a large debt. During the PE-LBO ownership period, PE partners focus on improving the LBO performance and on increasing its valuation with the objective of exiting the investment with large ROIs for their investors. To facilitate their objectives, the PE firm aligns the LBO’s leadership with its goals through changes in the leadership team and creative incentive plans. This research study investigates the influence of PE on innovation in PE LBOs, exploring factors that impact innovation and linking them to reasons for acquisition failures. Primarily, factors studied herein explore hypotheses about the effects of short-term ownership, management restructuring, management incentive plans, and debt size on new product development and innovation. Through the implementation of case study research utilizing surveys of LBO executives, this study uncovers challenges and opportunities that impact PE LBO acquisitions and gleans insight into potential mechanisms for successful financial outcomes. As a result, this study details a rigorous, strategic, and systematic platform that highlights three PE engagement phases with an LBO company. These phases include the acquisition phase, the planning phase, and the execution phase. This platform facilitates decision making and provides guidelines and recommendations to help increase leadership focus on innovation and enhance the success rate of related investments and the future success of LBOs. Notably, these guidelines are also applicable to the broader merger and acquisition (M&A) market

Preparation for Quantum Simulation of the 1+1D O(3) Non-linear {\sigma}-Model using Cold Atoms

The 1+1D O(3) non-linear {\sigma}-model is a model system for future quantum lattice simulations of other asymptotically-free theories, such as non-Abelian gauge theories. We find that utilizing dimensional reduction can make efficient use of two-dimensional layouts presently available on cold atom quantum simulators. A new definition of the renormalized coupling is introduced, which is applicable to systems with open boundary conditions and can be measured using analog quantum simulators. Monte Carlo and tensor network calculations are performed to determine the quantum resources required to reproduce perturbative short-distance observables. In particular, we show that a rectangular array of 48 Rydberg atoms with existing quantum hardware capabilities should be able to adiabatically prepare low-energy states of the perturbatively-matched theory. These states can then be used to simulate non-perturbative observables in the continuum limit that lie beyond the reach of classical computers.Comment: 12 pages, 5 figures, 2 tables, published versio