Transitioning from MODIS to VIIRS Global Water Reservoir Product.

Reservoirs play a crucial role in regulating water availability and enhancing water security. Here, we develop NASA's Visible Infrared Imaging Radiometer Suite (VIIRS) based Global Water Reservoir (GWR) product, consisting of measurements of reservoir area, elevation, storage, evaporation rate, and evaporation loss for 164 large global reservoirs. The dataset is available at 8-day and monthly temporal resolutions. Since the Moderate Resolution Imaging Spectroradiometer (MODIS) is close to the end of its life, we further evaluated the consistency between MODIS and VIIRS-based GWR to ensure continuity to the 20+ year MODIS GWR product. Independent assessment of VIIRS reservoir storage (8-day) retrievals against in-situ measurements shows an average of R2 = 0.84, RMSE = 0.47 km3, and NRMSE = 16.45%. The evaporation rate has an average of R2 = 0.56, RMSE = 1.32 mm/day, and NRMSE = 28.14%. Furthermore, results show good consistency (R2 ≥ 0.90) between the VIIRS and MODIS-based product components, confirming that long-term data continuity can be achieved. This dataset can provide valuable insights for long-term trend analysis, hydrological modeling, and understanding hydroclimatic extremes in the context of reservoirs.

[Effectiveness of a structured educative program in Chilean diabetic patients]. / Eficacia de un programa educativo estructurado en población diabética chilena.

BACKGROUND: Structured educative programs have demonstrated their usefulness as a strategy to improve metabolic control in diabetic patients. AIM: To evaluate the effectiveness of a structured educative program for Chilean diabetic patients. MATERIAL AND METHODS: A randomized clinical trial in diabetic patients with glycosylated hemoglobin over 7.5%. One hundred fifteen patients were studied, 59 patients participated in the structured educative program (experimental group) and 56 patients received no structured education (control group). Patients were followed for 12 months. RESULTS: Between baseline and 12 months of follow-up, glycosylated hemoglobin changed from 10.05 to 9.11% in experimental patients and from 9.86 to 9.25% in controls. No significant differences between experimental and control groups in other clinical and metabolic parameters were observed. In the experimental group, glycosylated hemoglobin reductions differed among the different educators who carried out the program. CONCLUSIONS: A structured educative program resulted in a 35% greater reduction in glycosylated hemoglobin levels, compared with a control group. Metabolic control improvement differed between the educators who carried out the program.

Eficacia de un programa educativo estructurado en población diabética chilena / Effectiveness of a structured educative program in Chilean diabetic patients

Background: Structured educative programs have demonstrated their usefulness as a strategy to improve metabolic control in diabetic patients. Aim: To evaluate the effectiveness of a structured educative program for Chilean diabetic patients. Material and Methods: A randomized clinical trial in diabetic patients with glycosylated hemoglobin over 7.5%. One hundred fifteen patients were studied, 59 patients participated in the structured educative program (experimental group) and 56 patients received no structured education (control group). Patients were followed for 12 months. Results: Between baseline and 12 months of follow-up, glycosylated hemoglobin changed from 10.05 to 9.11% in experimental patients and from 9.86 to 9.25% in controls. No significant differences between experimental and control groups in other clinical and metabolic parameters were observed. In the experimental group, glycosylated hemoglobin reductions differed among the different educators who carried out the program. Conclusions: A structured educative program resulted in a 35% greater reduction in glycosylated hemoglobin levels, compared with a control group. Metabolic control improvement differed between the educators who carried out the program.

Land and cryosphere products from Suomi NPP VIIRS: Overview and status.

[1] The Visible Infrared Imaging Radiometer Suite (VIIRS) instrument was launched in October 2011 as part of the Suomi National Polar-Orbiting Partnership (S-NPP). The VIIRS instrument was designed to improve upon the capabilities of the operational Advanced Very High Resolution Radiometer and provide observation continuity with NASA's Earth Observing System's Moderate Resolution Imaging Spectroradiometer (MODIS). Since the VIIRS first-light images were received in November 2011, NASA- and NOAA-funded scientists have been working to evaluate the instrument performance and generate land and cryosphere products to meet the needs of the NOAA operational users and the NASA science community. NOAA's focus has been on refining a suite of operational products known as Environmental Data Records (EDRs), which were developed according to project specifications under the National Polar-Orbiting Environmental Satellite System. The NASA S-NPP Science Team has focused on evaluating the EDRs for science use, developing and testing additional products to meet science data needs, and providing MODIS data product continuity. This paper presents to-date findings of the NASA Science Team's evaluation of the VIIRS land and cryosphere EDRs, specifically Surface Reflectance, Land Surface Temperature, Surface Albedo, Vegetation Indices, Surface Type, Active Fires, Snow Cover, Ice Surface Temperature, and Sea Ice Characterization. The study concludes that, for MODIS data product continuity and earth system science, an enhanced suite of land and cryosphere products and associated data system capabilities are needed beyond the EDRs currently available from the VIIRS.