Université de Sherbrooke

About: Université de Sherbrooke is a education organization based out in Sherbrooke, Quebec, Canada. It is known for research contribution in the topics: Population & Receptor. The organization has 14922 authors who have published 28783 publications receiving 792511 citations. The organization is also known as: Universite de Sherbrooke & Sherbrooke University.

The geography of biodiversity change in marine and terrestrial assemblages.

Abstract: Human activities are fundamentally altering biodiversity. Projections of declines at the global scale are contrasted by highly variable trends at local scales, suggesting that biodiversity change may be spatially structured. Here, we examined spatial variation in species richness and composition change using more than 50,000 biodiversity time series from 239 studies and found clear geographic variation in biodiversity change. Rapid compositional change is prevalent, with marine biomes exceeding and terrestrial biomes trailing the overall trend. Assemblage richness is not changing on average, although locations exhibiting increasing and decreasing trends of up to about 20% per year were found in some marine studies. At local scales, widespread compositional reorganization is most often decoupled from richness change, and biodiversity change is strongest and most variable in the oceans.

Viscosupplementation with hylan for the treatment of osteoarthritis: findings from clinical practice in Canada.

Abstract: Objective. To evaluate viscosupplementation with intraarticular hylan G-F 20 in current clinical practice. Methods. A retrospective study of all patients with osteoarthritis of the knee treated with hylan by 5 Canadian clinicians over a period of 2.5 years. Results. A total of 1537 injections were performed in 336 patients involving 458 knees. The overall response and the change of activity level were judged better or much better for 77 and 76% of the treated knees after the first course of treatment (3 weekly injections), and 87 and 84% after a 2nd course. The mean time elapsing between the first and 2nd course, 8.2 ± 0.5 months, is an evaluation of the duration of benefits. Local adverse events were observed in 28 patients (32 knees), with an overall rate of 2.7% adverse events per injection, 7.0% per joint, and 8.3% per patient. No systemic adverse events were noted in any patient. The adverse events were characterized by pain and/or transient swelling of the injected joint, mostly mild or moderate in intensity, and 72% of the adverse events were considered to be possibly or probably related to the injection. The incidence of adverse events is significantly influenced by the injection technique : 5.2% adverse events per injection with a medial approach to a partially bent knee, and 2.4% (straight medial) and 1.5% (straight lateral). After an adverse event, clinical improvement still occurred in 69% of the affected knees. Conclusion. Hylan G-F 20 provided good clinical benefits and an acceptable safety profile in current clinical practice. The occurrence of adverse events after an intraarticular hylan injection is infrequent and unpredictable and is not necessarily hylan related, although injection related.

Measuring Patients’ Perceptions of Patient-Centered Care: A Systematic Review of Tools for Family Medicine

Abstract: PURPOSE Patient-centered care is widely acknowledged as a core value in family medicine. In this systematic review, we aimed to identify and compare instru- ments, subscales, or items assessing patients' perceptions of patient-centered care in family medicine. METHODS We conducted a systematic literature review using the MEDLINE, Embase, and Cochrane databases covering 1980 through April 2009, with a spe- cifi c search strategy for each database. The search strategy was supplemented with searching by hand and expert suggestions. We looked for articles meeting all of the following criteria: (1) describing self-administered instruments measuring patient perceptions of patient-centered care; (2) reporting quantitative or psychometric results of development or validation; (3) being relevant to an ambulatory family medicine context. The quality of each article retained was assessed using a modi- fi ed version of the Standards for Reporting of Diagnostic Accuracy. Instrument' items were mapped to dimensions of a patient-centered care conceptual framework. RESULTS Of the 3,045 articles identifi ed, 90 were examined in detail, and 26, covering 13 instruments, met our inclusion criteria. Two instruments (5 articles) were dedicated to patient-centered care: the Patient Perception of Patient-Cen- teredness and the Consultation Care Measure, and 11 instruments (21 articles) included relevant subscales or items. CONCLUSIONS The 2 instruments dedicated to patient-centered care address key dimensions but are visit-based, limiting their applicability for the study of care processes over time, such as chronic illness management. Relevant items from the 11 other instruments provide partial coverage of the concept, but these instru- ments were not designed to provide a specifi c assessment of patient-centered care.

Robust Sound Source Localization Using a Microphone Array on a Mobile Robot

Abstract: The hearing sense on a mobile robot is important because it is omnidirectional and it does not require direct line-of-sight with the sound source. Such capabilities can nicely complement vision to help localize a person or an interesting event in the environment. To do so the robot auditory system must be able to work in noisy, unknown and diverse environmental conditions. In this paper we present a robust sound source localization method in three-dimensional space using an array of 8 microphones. The method is based on time delay of arrival estimation. Results show that a mobile robot can localize in real time different types of sound sources over a range of 3 meters and with a precision of 3 degrees.