Surface water bodies mapping in Zimbabwe using landsat 8 OLI multispectral imagery: A comparison of multiple water indices
Publication date: Available online 8 May 2018Source: Physics and Chemistry of the Earth, Parts A/B/CAuthor(s): Mhosisi Masocha, Timothy Dube, Mellisa Makore, Munyaradzi D. Shekede, Jacob FunaniAbstractWater is integral for the survival of humans, animals, as well as vegetation and information on its spatial distribution is important for water resources management. Various methods have been applied to detect and map land surface water, especially due to the availability of a large range of satellite sensors. The main methods involved are either general feature classification techniques or thematic water body information extraction. Thematic water body extraction methods make use of band information and in this study; spectral indices are used to delineate land surface water for Zimbabwe using Landsat 8 OLI images. Multiple algorithms i.e. spectral indices were used to extract surface water bodies from Landsat 8 imagery.Then overall accuracies and Kappa coefficients and average reliability were then applied to assess the performance of the seven applied models. The results have shown that the LSWI plus VI can map surface water bodies with an overall accuracy of 86%, kappa statistic of 0.70 and a reliability accuracy of 89%. Comparatively, the index produced good results followed by the mNDWI which had an overall classification accuracy of 84% and an average reliability of 87%. Following on the list in terms of performance was the AWEIsh, mMDWI plus VI, NDWI and NDWI plus VI. Ho...
Authors: Rohanachandra YM, Amarabandu HGI, Rohanachandra LT Abstract Parenting with mental illness is associated with family conflicts, parenting difficulties, low parental confidence and increased mental health and behavioural problems in children. Family focused interventions improve child outcomes by about 40 %. However, such services are not available in Sri Lanka.A cross sectional descriptive study was carried out in the general adult psychiatry follow-up clinics in a Teaching Hospital in Colombo, Sri Lanka to assess the needs of parents with mental illness. A specifically designed interviewer administered que...
Authors: Charnsil C, Narkpongphun A, Chailangkarn K Abstract AIMS: This research examines the prevalence of post-traumatic stress disorder (PTSD) and its related factors in students whose school burned down, one month and six months after the incident. METHODS: A total of 56 students from grades one through six were invited to participate in this study with permission from their parents. Subjects were screened for PTSD by using UCLA PTSD Reaction Index (DSM-5 Version) during three periods: 1, 6, and 12 months after the incident. Children diagnosed with PTSD were interviewed by a child and adolescent psychiatris...
Consultations in Liver Disease
Vinod K. Rustgi
NORMAN GITLIN, MD, FRCP (LONDON), FRCPE (EDINBURGH), FAASLD, FACP, FACG
CLINICS IN LIVER DISEASE
Hippocrates (460-371 bc) first recognized the relationship between the neuropsychological and physiologic changes observed in liver disease (Figs. 1 and 2). At that time, Hippocrates noted that there was a poor clinical outcome associated with delirium that was preceded by jaundice.1
We present a brief overview of the potential prophylactic and treatment agents under investigation, some which could be initiated in the ED if proven effective.
[Daily Maverick] While the promise of repositioning 'old' drugs such as chloroquine and hydroxychloroquine is tantalising, it is critical that the hazards of using unapproved treatments are shared with the public to prevent needless fatalities and supply shortages that may further burden already strained healthcare systems.