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Favela J.,Center for Scientific Research and Higher Education of Ensenada | Castro L.A.,Sonora Institute of Technology | Franco-Marina F.,National Institute of Respiratory Diseases | Sanchez-Garcia S.,National Health Research Institute | And 5 more authors.
Clinical Interventions in Aging | Year: 2013

Objective: To assess whether an intervention based on nurse home visits including alert buttons (NV+AB) is effective in reducing frailty compared to nurse home visits alone (NV-only) and usual care (control group) for older adults. Design: Unblinded, randomized, controlled trial. Setting: Insured population covered by the Mexican Social Security Institute living in the city of Ensenada, Baja California, Mexico. Participants: Patients were aged over 60 years with a frailty index score higher than 0.14. Intervention: After screening and informed consent, participants were allocated randomly to the control, NV+AB, or NV-only groups. Measurements: The primary outcome was the frailty score 9 months later. Quality of life, depression, comorbidities, health status, and health service utilization were also considered. Results: The framing sample included 819 patients. Of those, 591 were not located because they did not have a landline/telephone (341 patients), they had died (107), they were ill (50), or they were not currently living in the city (28). A screening interview was applied to 228 participants, and 57 had a score ≤0.14, 171 had ≥0.14, and 16 refused to complete the baseline questionnaire. A home visit was scheduled for 155 patients. However, 22 did not complete the baseline questionnaire. The final 133 subjects were randomized into the NV+AB (n = 45), NV-only (n = 44), and control (n = 44) groups. There were no statistically significant differences in the baseline characteristics of the groups. The mean age overall was 76.3 years (standard deviation 4.7) and 45% were men. At the baseline, 61.65% were classified as frail. At end of follow-up the adjusted prevalence of frailty in NV+AB group was 23.3% versus 58.3% in the control group. Conclusion: An intervention based on NV+AB seems to have a positive effect on frailty scores. © 2013 Favela et al, publisher and licensee Dove Medical Press Ltd. Source

Murrieta-Rico F.N.,Center for Scientific Research and Higher Education of Ensenada | Hernandez-Balbuena D.,Autonomous University of Baja California | Petranovskii V.,National Autonomous University of Mexico | Nieto Hipolito J.I.,Autonomous University of Baja California | And 4 more authors.
IEEE International Symposium on Industrial Electronics | Year: 2014

Inertial navigation systems have as sensing elements gyroscopes and accelerometers. The accelerometers with a frequency output domain have some outstanding characteristics like output of quasi-digital signals, high sensitivity, high resolution, wide dynamic range, anti-interference capacity and good stability. This work explains how this sensor works inside an inertial navigation unit and how the measurement of acceleration can be improved through a novel frequency measurement principle. Also it is examined how in a common accelerometer the frequency measurement by principle of rational approximation can be easily implemented with low cost-affordable components. The error analysis in the measurement process is introduced. © 2014 IEEE. Source

Muguet J.-B.,University of California at Davis | Lazo J.P.,Center for Scientific Research and Higher Education of Ensenada | Piedrahita R.H.,University of California at Davis
Aquaculture Nutrition | Year: 2011

This study evaluated weaning success of California halibut, Paralichthys californicus, larvae onto a microdiet at various stages of development utilizing growth, survival and digestive enzyme activity. Weaning onto a microdiet was evaluated at 16, 26, 36 and 46days posthatch (dph). Alkaline and acid proteases and leucine aminopeptidase activities were measured after weaning and compared between the weaned treatment and Artemia-fed controls. Survival was significantly lower in the microdiet-fed treatments compared to the control groups. Growth was significantly reduced in all weaning treatments compared to the control, except for the 46dph group. No differences in enzyme activities were detected between treatment and diet at 16 and 26dph; however, activities were higher for the microdiet-fed larvae at 36 and 46dph. This study demonstrates that California halibut larvae possess a differentiated and effective digestive system early in development and can be weaned with relative success (>40% survival) before completion of the metamorphosis (i.e., 36dph). The lack of weaning success at an early date cannot be entirely because of the absence of a functional stomach but could be related to, among other factors, the low-microdiet ingestion rates observed and higher leaching of smaller microdiets. © 2010 Blackwell Publishing Ltd. Source

Castro L.A.,Sonora Institute of Technology | Favela J.,Center for Scientific Research and Higher Education of Ensenada | Garcia-Pena C.,National Health Research Institute
CIN - Computers Informatics Nursing | Year: 2014

The transition from paper to electronic-based records in the healthcare industry has posed several challenges to conventional medical practices. The introduction of technology in day-to-day medical and nursing practices deserves careful consideration. In this work, we report the results of a controlled experiment to compare nurses' consultation in emergency calls in six different conditions. We studied the effect that the type of communication media (face-to-face, telephone, videoconference) and type of nursing protocol media (paper-based, electronic-based) can have on consultation time, mistakes made, pauses during consultation, eye contact, and efficacy of the consultation. We found that the type of communicationmedia has an effect on consultation time; on average, fewer mistakes were made during telephone-based consultations; for eye contact, there were significantly fewer eye contacts during face-to-face than during videoconference consultations; finally, the type of communication media or protocol media did not have any effect in the efficacy of the consultation. Copyright © 2014 Wolters Kluwer Health | Lippincott Williams & Wilkins. Source

Cox T.E.,CNRS Oceanography Laboratory of Villefranche | Schenone S.,CNRS Oceanography Laboratory of Villefranche | Schenone S.,University of Genoa | Delille J.,CNRS Oceanography Laboratory of Villefranche | And 5 more authors.
Journal of Ecology | Year: 2015

Biological interactions can alter predictions that are based on single-species physiological response. It is known that leaf segments of the seagrass Posidonia oceanica will increase photosynthesis with lowered pH, but it is not clear whether the outcome will be altered when the whole plant and its epiphyte community, with different respiratory and photosynthetic demands, are included. In addition, the effects on the Posidonia epiphyte community have rarely been tested under controlled conditions, at near-future pH levels. In order to better evaluate the effects of pH levels as projected for the upcoming decades on seagrass meadows, shoots of P. oceanica with their associated epiphytes were exposed in the laboratory to three pH levels (ambient: 8.1, 7.7 and 7.3, on the total scale) for 4 weeks. Net productivity, respiration, net calcification and leaf fluorescence were measured on several occasions. At the end of the study, epiphyte community abundance and composition, calcareous mass and crustose coralline algae growth were determined. Finally, photosynthesis vs. irradiance curves (PE) was produced from segments of secondary leaves cleaned of epiphytes and pigments extracted. Posidonia leaf fluorescence and chlorophyll concentrations did not differ between pH treatments. Net productivity of entire shoots and epiphyte-free secondary leaves increased significantly at the lowest pH level yet limited or no stimulation in productivity was observed at the intermediate pH treatment. Under both pH treatments, significant decreases in epiphytic cover were observed, mostly due to the reduction of crustose coralline algae. The loss of the dominant epiphyte producer yet similar photosynthetic response for epiphyte-free secondary leaves and shoots suggests a minimal contribution of epiphytes to shoot productivity under experimental conditions. Synthesis. Observed responses indicate that under future ocean acidification conditions foreseen in the next century an increase in Posidonia productivity is not likely despite the partial loss of epiphytic coralline algae which are competitors for light. A decline in epiphytic cover could, however, reduce the feeding capacity of the meadow for invertebrates. In situ long-term experiments that consider both acidification and warming scenarios are needed to improve ecosystem-level predictions. © 2015 British Ecological Society. Source

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