ABSTRACT
Photovoltaic (PV) solar energy generating capacity has grown by 41 per cent per year since 20091. Energy system projections that mitigate climate change and aid universal energy access show a nearly ten-fold increase in PV solar energy generating capacity by 20402,3. Geospatial data describing the energy system are required to manage generation intermittency, mitigate climate change risks, and identify trade-offs with biodiversity, conservation and land protection priorities caused by the land-use and land-cover change necessary for PV deployment. Currently available inventories of solar generating capacity cannot fully address these needs1-9. Here we provide a global inventory of commercial-, industrial- and utility-scale PV installations (that is, PV generating stations in excess of 10 kilowatts nameplate capacity) by using a longitudinal corpus of remote sensing imagery, machine learning and a large cloud computation infrastructure. We locate and verify 68,661 facilities, an increase of 432 per cent (in number of facilities) on previously available asset-level data. With the help of a hand-labelled test set, we estimate global installed generating capacity to be 423 gigawatts (-75/+77 gigawatts) at the end of 2018. Enrichment of our dataset with estimates of facility installation date, historic land-cover classification and proximity to vulnerable areas allows us to show that most of the PV solar energy facilities are sited on cropland, followed by aridlands and grassland. Our inventory could aid PV delivery aligned with the Sustainable Development Goals.
ABSTRACT
Pain can cause both physical and psychological distress that has a negative impact on a patient's quality of life. The purpose of this descriptive study was to determine whether cancer patients (N = 60) with pain (n = 30) had higher scores of depression, anxiety, somatization, and hostility than did cancer patients without pain (n = 30). The study was conducted in a midwestern medical center hospital during a 9-month period. Psychological variables were measured using subscales of the Brief Symptom Inventory (BSI). Patients who reported pain completed the McGill Pain Questionnaire (MPQ) and Visual Analogue Scale. Significant positive correlations were found between total MPQ scores and all four subscales of the BSI (r = 0.60-0.78, p < 0.05). Patients with pain scored higher on all four subscales of the BSI, with significant differences occurring in somatization (t = 2.05, p < 0.05) and hostility (t = 1.93, p < 0.05). The findings suggest a relationship between pain intensity and psychological status. Nursing interventions aimed at reducing these factors may help to decrease the pain, in addition to then decreasing the psychological distress experienced by patients with cancer.
