Miracle-dz/UniFAR-FTUs huggingface dataset:
EPR-based ghost imaging using a single-photon-sensitive camera

Correlated photon imaging, popularly known as ghost imaging, is a technique whereby an image is formed from light that has never interacted with the object. In ghost imaging experiments, two correlated light fields are produced. One of these fields illuminates the object, and the other field is measured by a spatially resolving detector. In the quantum regime, these correlated light fields are produced by entangled photons created by spontaneous parametric down-conversion. To date, all correlated photon ghost imaging experiments have scanned a single-pixel detector through the field of view to obtain spatial information. However, scanning leads to poor sampling efficiency, which scales inversely with the number of pixels, N, in the image. In this work, we overcome this limitation by using a time-gated camera to record the single-photon events across the full scene. We obtain high-contrast images, 90%, in either the image plane or the far field of the photon pair source, taking advantage of the Einstein–Podolsky–Rosen-like correlations in position and momentum of the photon pairs. Our images contain a large number of modes, >500, creating opportunities in low-light-level imaging and in quantum information processing.
The impact of alcohol hand sanitizer use on infection rates in an extended care facility.

BACKGROUND Nosocomial infections are a major problem in health care facilities, resulting in extended durations of care and substantial morbidity. Since alcohol gel hand sanitizers combine high immediate antimicrobial efficacy with ease of use, this study was carried out to determine the effect of the use of alcohol gel hand sanitizer by caregivers on infection types and rates in an extended care facility. METHOD Infection rate and type data were collected in a 275-bed extended care facility for 34 months (July 1997 to May 2000), during which an alcohol gel hand sanitizer was used by the caregivers in 2 units of the facility. RESULTS The primary infection types found were urinary tract with Foley catheter, respiratory tract, and wound infections. Comparison of the infection types and rates for the units where hand sanitizer was used with those for the control units where the hand sanitizer was not used showed a 30.4% decrease in infection rates for the 34-month period in the units where hand sanitizer was used. CONCLUSION This study indicates that use of an alcohol gel hand sanitizer can decrease infection rates and provide an additional tool for an effective infection control program.
The Strategic Effects of Multimarket Contact: Mutual Forbearance and Competitive Response in the Personal Computer Industry

Firms frequently compete across multiple segments. Such multimarket contact has been shown to deter aggressive competition, leading to “mutual forbearance. ” Empirical support for this phenomenon derives mainly from studies on the direct effects of multimarket contact on a firm's decision variables. The analysis in this article extends the existing literature by empirically considering both the direct effects of multimarket contact (i.e., how it affects a firm's decision variables) and its strategic effects (i.e., how it affects a firm's reactions to its competitors' decision variables). The authors study the pricing and new product introduction decisions of firms in the personal computer industry. Consistent with prior research, the authors find that firms mutually forbear in price and new product introductions. More important, the authors find strong strategic effects that are asymmetric; namely, firms respond to competitive attacks by introducing new products but do not use price as a retaliatory weapon. Thus, firms isolate any competitive retaliation to only a single marketing variable. The results offer a deeper understanding of the influence of multimarket contact on firm behavior.
Pricing in the mutual fund industry is rapidly emerging as a new puzzle in finance as more and more papers document a negative relationship between the quality of the fund management services

In this paper I analyze investors’ reactions to changes in the expense ratios of equity mutual funds. I show that investment flows’ response to fees cannot be fully explained by looking at investors’ performance sensitivity. While performance sensitivity monotonically increases with past performance, price sensitivity does not: investors who buy top past performers seem to be “distracted” by the fund’s previous return and pay relatively little attention to the expense ratios. Moreover price sensitivity increases with fund visibility while performance sensitivity decreases, and while looking at data from 1986 to 2006 no discernible trend can be observed in the average performance sensitivity, price sensitivity strongly increases due to the dramatic increase in the availability of mutual funds’ information for retail investors. Finally I show that investment companies strategically time their repricing decisions in order to exploit time variations in price and performance sensitivities, and that fund governance quality affects the degree to which investment companies engage in this opportunistic behavior.
Negative Association of Hospital Efficiency Under Increasing Geographic Elevation on Acute Myocardial Infarction In-Patient Mortality

Although variation in-patient outcomes based on hospitals' geographic location has been studied, altitude of hospitals above sea level may also affect patient outcomes. Possibly, because of negative physical and psychological effects of altitude on hospital employees, hospital efficiency may decline at higher altitudes. Greater focus on hospital efficiency, despite decreasing efficiency at higher altitudes, could increase demands on hospital employees and further deteriorate patient outcomes. Using data envelopment analysis on a sample of 840 hospital-year observations representing 95,504 patients with acute myocardial infarction (AMI) in the United States, and controlling for patient, hospital, and county characteristics and controlling for hospital, state, and year fixed effects, we find support for the negative association between hospital altitude and efficiency; for 1 percentage point increase in efficiency and every 1,000 feet increase in altitude above the sea level, the mortality of patients with AMI increases by 0.66 percentage points. The findings have implications for hospital performance at increasing geographic elevation and introduces to the literature the notion of “health economics of elevation,” to suggest that elevation of a hospital may be an important criterion for consideration for policy makers and insurance firms.
The Transfer of Experience in Groups of Organizations: Implications for Performance and Competition

Groups of organizations are pervasive, although there is little systematic knowledge about how they affect their members. We examine one dimension of the operation of organization groups, the transfer of experience. Our core argument is that organization groups may create benefits for their members, but problems for those outside the group. Within the group they can facilitate the transfer of experience among their members by creating mechanisms for communication, incentives for helping, and by promoting understanding. The predicted pattern of experience transfer should improve performance of those within the group, but also has implications for those outside it. Experience accumulated in one organization group strengthens the competitiveness of its organizations, and thereby harms competitors outside the group. Thus, organization groups are fundamental both for the functioning of their members and the competitive dynamics of their industries. Our longitudinal analysis of the profitability of kibbutz agriculture supports both these claims. Between 1954 and 1965 (the years of this study), almost all kibbutzim were part of organization groups. Kibbutzim became more profitable as a function of the experience of others in their group. Their profitability was reduced, however, as a function of experience of others outside their group.
Association of the Weekly Practice of Guided Physical Activity With the Reduction of Falls and Symptoms of Fibromyalgia in Adult Women

Abstract Martínez-Amat, A, Hita-Contreras, F, Latorre-Román, PA, Gutierrez-López, MdlC, García-Pinillos, F, and Martínez-López, EJ. Association of the weekly practice of guided physical activity with the reduction of falls and symptoms of fibromyalgia in adult women. J Strength Cond Res 28(11): 3151–3159, 2014—The purpose of this study was to evaluate the effects of weekly physical activity on the risk of falls and the impact of fibromyalgia (FM) symptoms on daily function in Spanish women. Fibromyalgia is a common widespread pain condition that has been linked to an increased risk of falling and a low amount of guided physical activity, defined as regular participation in moderate-intensity exercise. Before the development of fall-risk reduction interventions, it is essential to understand the context of falls and fall-related experiences in patients with FM. Ours was a descriptive longitudinal study, wherein 140 women participated, all aged 28–73 years and belonging to AFIXA (Asociación Provincial de Fibromialgia y Síndrome de Fatiga Crónica), the Fibromyalgia Association of Jaén (Andalusia, Spain). The study took place during 2013; data were collected through fall diaries, interviews, and questionnaires. Results showed that weekly physical activity can explain up to 12% of the variance in the fear of falling and 18% of the number of falls per year in patients with FM. However, the weekly physical activity prediction against the perceived impact of FM yielded R2 values below 10% in the 3 factors and in the total score of the Revised Fibromyalgia Impact Questionnaire (FIQ-R). Inactive women were proven to have a significantly higher number of falls per year than active ones (1.86 ± 1.46 vs. 0.69 ± 0.43, p < 0.001), but their fear of falling was similar (p > 0.05). In addition, physically active women had a significantly lower intensity in the symptoms of their condition (FIQ-R symptoms: 30.87 ± 8.58 vs. 34.78 ± 7.58 arbitrary units [a.u.], p = 0.014), and lower scores in the total score of the FIQ-R (54.33 ± 21.50 vs. 65.19 ± 19.27 a.u., p = 0.004). Results show that, with at least 1 hour per session of guided physical activity, a higher weekly number of sessions reduced the fear of falling in patients with FM and the total number of falls per year, and is associated with less severe symptoms (FIQ-R3).
Color- and Edge-Sensitive Channels in the Human Visual System: Tuning for Orientation

After subjects scanned red stripes tilted clockwise off vertical and green stripes tilted equally but counterclockwise, vertical test stripes appeared tilted counterclockwise when red but clockwise when green. As the angle between scanned and test stripes was increased from 0� to 75�, the magnitude of the tilt aftereffect rapidly increased to a peak between 10� and 15� and then dropped close to zero at about 40�, a result consistent with narrowly tuned edge-sensitive channels.
A low-Ca2+ response (LCR) secretion (ysc) locus lies within the lcrB region of the LCR plasmid in Yersinia pestis

The causative agent of plague, Yersinia pestis, contains a 75-kb plasmid, pCD1, which carries a virulence-related stimulon called the low-Ca2+ response stimulon (LCRS). LCRS operons are regulated by the environmental signals of temperature and Ca2+. This study characterized a portion of the lcrB region of pCD1, known to contain at least one gene necessary for the regulation of LCRS operons by Ca2+. The sequence of a 2-kb region revealed three open reading frames, designated yscQ, yscR, and yscS, predicted to encode acidic proteins of 34.4, 24.4, and 8.5 kDa. All three proteins were homologous to proteins involved in flagellar function or virulence. An antipeptide antibody specific for YscR was used to localize YscR to the inner membrane of Y. pestis. Analysis of yscR-phoA fusions supported a model for yscR which predicts four transmembrane regions and a large, central hydrophilic domain. In-frame deletion mutations of yscQ and yscR were constructed and moved into Y. pestis. Both mutants failed to show the restriction of growth that normally accompanies maximal LCRS induction. Unlike the parent Y. pestis, the yscR mutant did not respond to the absence of Ca2+ by increasing the net transcription or translation of the LCRS-encoded V antigen, YopM, or LcrG. The yscR mutant also was defective for secretion of V antigen, YopM, and LcrG. These findings implicate a dual role for YscR in regulation of LCRS operons and secretion of LCRS proteins and add to the developing picture of how secretion of virulence proteins may be coupled to transcriptional regulation in yersiniae.
Emerging Pests and Vector-borne Diseases in Europe

tions that, up until that time, had only received an episodic focus. One drawback of the book is that the authors cover a wide gamut of topics. Consequently, disease-specifi c topics are presented without adequately providing the necessary background on the disease entity to the reader. Not all readers may fully understand the necessary disease-specifi c background that would make the discussions of public health intervention understandable. For instance, the chapter on TB presents a history of the disease from the turn of the 20th century. But if the reader were unaware of the public health threat posed by the undiagnosed or nonadherent TB patient, the reader would understandably question the authority of public health practitioners to occasionally take extraordinary steps to ensure that infection is not transmitted within the community. Even without a comprehensive background on specifi c diseases, this book will interest a wide audience, not only public health practitioners but the medical and legal community with whom we partner. Searching Eye tackles a topic that deserves more of our respective attention, for as noted by the authors, “The vitality of democratic communities necessitates an ongoing effort to negotiate and renegotiate the boundaries between privacy, society’s limiting principle, and public health, which at its best has sought to expand the role of government as a guardian against disease and suffering. ” I congratulate the authors on their wellresearched and thorough discourse on this core public health activity.
Altered functional connectivity in patients with post-stroke memory impairment: A resting fMRI study

Post-stroke memory dysfunction (PMD) is one of the most common forms of cognitive impairment among stroke survivors. However, only a limited number of studies have directly investigated the neural mechanisms associated with memory decline. The aim of the present study was to identify dynamic changes in the functional organization of the default mode network (DMN) and the dorsal attention network of patients with PMD. A total of 27 patients with PMD who experienced a stroke in the right hemisphere were enrolled in the current study, along with 27 healthy control subjects matched by age, sex, and educational level. A behavioral examination and functional magnetic resonance imaging scan were performed. The data were analyzed using an independent component analysis method. The results revealed a significantly increased functional connectivity between the DMN and prefrontal cortex (left middle/inferior frontal and left precentral gyri), temporal regions (left superior temporal gyrus), and bilateral and posterior cingulate gyri/precuneus (P<0.001). There was also a significantly decreased functional connectivity between the DMN and right middle temporal gyrus, left uvula, and right inferior parietal lobule, and between the dorsal attention network and prefrontal cortex (left precentral/inferior and right inferior/middle frontal gyri), right inferior parietal gyrus, and right insula (P<0.001). These results suggest that the stroke affected both the lesioned and contralesional hemispheres. The prefrontal cortex, temporal regions, insula, and posterior cingulate gyrus/precuneus serve a crucial role in memory processing.
A quantitative analysis of unqualified Dublin Core Metadata Element Set usage within data providers registered with the Open Archives Initiative

This research describes an empirical study of how the unqualified Dublin core metadata element set (DC or DCMES) is used by 100 data providers (DPs) registered with the Open Archives Initiative (OAI). The research was conducted to determine whether or not the DCMES is used to its full capabilities. Eighty-two of 100 DPs have metadata records available for analysis. DCMES usage varies by type of DP. The average number of Dublin core elements per record is eight, with an average of 91,785 Dublin core elements in each DP. Five of the 15 elements of the DCMES are used 71% of the time. The results show the unqualified DCMES is not used to its fullest extent within DPs registered with the OAI.
Job Stress among General Practitioners and Nurses in Primary Care in England

This is a description comparing job stress, job satisfaction, and mental well-being of general practitioners (n = 205) and practice nurses (n = 119) in England, based on responses to a questionnaire. General practitioners reported lower job satisfaction and significantly greater pressure at work than did the practice nurses. Also, male general practitioners had significantly higher scores on anxiety and depression than a British normative population. Practice nurses, on the other hand, reported lower scores on anxiety and depression. The results should be interpreted with caution as the study is based on a small sample limited to the northwest region only; however, it does provide information which has important implications for the well-being of doctors and nurses in primary care.
Inverse Design Approach for Low-Boom Supersonic Configurations

The shaped sonic boom theory is a valuable, efficient, computationally economical, and robust tool in preliminary design of low-boom aircraft configurations. Instead of introducing a new F-function parameterization, because it has been investigated already in the past, this paper adopts a more general formulation proposed in the literature and focuses on reducing the limitations of the inverse method in the design process. Three main contributions are proposed: 1) a revisited procedure based on optimization to solve the coefficients of the F function that enables to switch between different parameterizations, 2) a definition of the geometry corresponding to the equivalent area distribution combined with a fuselage tailoring process based on direct shape optimization, and 3) a strategy to introduce a generic acoustic metrics in the definition of an optimum F function. The proposed strategy enables the designer to evaluate the geometry of a low-boom configuration that corresponds to a desired F function in .
Dynamic Ticket Pricing in Sport: An Agenda for Research and Practice

For decades, the airline and hotel industries have regularly changed prices to keep pace with fluctuating levels of consumer demand. This demand-based approach to pricing is referred to as revenue management. Meanwhile, the sport industry has traditionally underpriced tickets using a cost-based approach in order to maximize attendance and promote fan satisfaction. However, as operating costs have grown, sport organizations are now forced to reconsider these conservative pricing practices. Subsequently, in 2009, the San Francisco Giants were the first team to utilize dynamic pricing, which is a strategy that mirrors the revenue management approach. While data supporting or refuting the reported benefits of this approach in sport remains sparse, the current paper utilizes the research on revenue management to develop an agenda of considerations regarding the use of demand-based ticket pricing strategies in sport. The paper is designed to guide researchers as they begin to explore the strategy's myriad of critical (and yet unexplored) issues. Additionally, practical implications of adopting this pricing strategy in sport are considered.
Modest but Reproducible Inhibition of Human Immunodeficiency Virus Type 1 Infection in Macrophages following LEDGFp75 Silencing

ABSTRACT LEDGFp75 is a cellular protein which binds human immunodeficiency virus type 1 (HIV-1) integrase with high specificity and affinity but whose function in infection has not been defined. We infected LEDGFp75-deficient primary macrophages with wild-type HIV in order to assess potential infection phenotypes which would provide clues to LEDGFp75 function. Silencing of LEDGFp75 by 70 to 80% resulted in an average of 53% reduced infection of macrophages by HIV. Analysis of infection intermediates showed that integration, but not two-long-terminal-repeat (2LTR) circles or late cDNAs, was reduced up to 74% in LEDGFp75-deficient macrophages. Therefore, LEDGFp75 has a modest involvement in HIV-1 integration in macrophages.
Protostellar feedback in turbulent fragmentation: consequences for stellar clustering and multiplicity

Stars are strongly clustered on both large (∼pc) and small (∼binary) scales, but there are few analytic or even semi-analytic theories for the correlation function and multiplicity of stars. In this paper, we present such a theory, based on our recently developed semi-analytic framework called MISFIT (Minimalistic Star Formation Including Turbulence), which models gravito-turbulent fragmentation, including the suppression of fragmentation by protostellar radiation feedback. We compare the results including feedback to a control model in which it is omitted. We show that both classes of models robustly reproduce the stellar correlation function at >0.01 pc scales, which is well approximated by a power law that follows generally from scale-free physics (turbulence plus gravity) on large scales. On smaller scales, protostellar disc fragmentation becomes dominant over common core fragmentation, leading to a steepening of the correlation function. Multiplicity is more sensitive to feedback: we found that a model with the protostellar heating reproduces the observed multiplicity fractions and mass ratio distributions for both Solar and sub-Solar mass stars (in particular, the brown dwarf desert), while a model without feedback fails to do so. The model with feedback also produces an at-formation period distribution consistent with the one inferred from observations. However, it is unable to produce short-range binaries below the length-scale of protostellar discs. We suggest that such close binaries are produced primarily by disc fragmentation and further decrease their separation through orbital decay.