Measuring beach topography accurately and with high spatial resolution is an important aspect of coastal management and is crucial for understanding changes in beach morphology, especially along complex, three-dimensional shorelines. Traditional methods of beach surveying even at high resolution are insufficient to measure the complex, dynamic behavior along these coasts. This study investigates the optimization of Unmanned Aerial Systems Structure from Motion (UAS-SfM) data acquisition methodology with regard to flight altitude and the configuration and amount of ground control points (GCPs). A sensitivity analysis was performed to determine the UAS and GCP characteristics that produce the most accurate digital elevation model (DEM). First, an evaluation of the UAS-SfM technique was performed and proved advantageous over traditional surveying techniques with regard to efficiency, automation, ease of use, and repeatability. The results of the sensitivity analysis showed the highest (116 m) flight altitude evaluated was the most accurate and required the least amount of survey and processing time. The optimal configuration of GCPs was determined to be (1) in the corners of the study site, (2) at high and low elevations within the study site, and (3) with sufficient cross-shore and alongshore coverage. Finally, it was found that 15 GCPs produced the best results, but that as few as 11 GCPs could be used without any significant loss in accuracy. It was also observed that fewer (≈7–9) well-placed GCPs in the optimal configuration produced the same magnitude of error as using more (15) poorly placed GCPs. Based on these results, a set of recommendations for conducting UAS-SfM surveys along complex, three-dimensional, developed coastlines is presented.
From March 2005 to April 2007 the French overseas department and Indian Ocean island of Réunion was significantly affected by an epidemic of chikungunya. Chikungunya is a vector-spread disease (by the aedes albopictus mosquito) that leads to painful rheumatic symptoms. The disease infected approximately one third of the island's total population of 802,000 inhabitants (Rallu 2009 ). This article is a discussion of local etiological accounts of chikungunya. The primary topic raised by informants was whether chikungunya was a vector- or air-borne disease. Even though informants had access to substantial biomedical information concerning the disease and its transmission, some were convinced by it and others were not. In order to make meaning of the disease, the Réunionese drew on various types of medical knowledge from different health sectors simultaneously. To understand people's experiences with chikungunya, we must account for all of their etiological explanations.
From 2005 to 2007 the French overseas department and Indian Ocean island of Réunion experienced for the first time ever an epidemic of chikungunya. Chikungunya is a vector-spread disease by mosquitoes that leads to painful rheumatic symptoms, and infected approximately one-third
of the island’s population of approximately 802,000 inhabitants.
This article is based upon a discourse analysis of text and images of 111 articles on chikungunya in Réunion’s two main newspapers. During the epidemic the Réunionese printed press functioned as a
provider of information, and an instigator of political polemics. The newspapers’ criticism responded to ‘orientalist’ representations of chikungunya within national press – and officialdom, but also reflected local perceptions of neglect and abandonment by the French
nation state. While taking issue with other studies of press coverage of the outbreak, however, I argue that the polemics illustrate historical Réunionese geopolitical identifications with France, instead of postcolonial opposition.
This article discusses students' perspectives on fertility control, including induced abortion, in Antananarivo, Madagascar. The study draws on a total of nine weeks of ethnographic fieldwork conducted in 2016 and 2017. It argues that while the majority of the students do not refrain from premarital sex, they negotiate their desire for physical intimacy in accordance with the prevailing discourse of premarital abstinence among the Merina ethnic group in the central highlands. In this context, modern contraception, particularly hormonal birth control that could cause menstruation to cease, is considered highly problematic since it was believed capable of creating a 'blockage' of the reproductive system which in turn could lead to future infertility. Due to such cultural barriers, there is therefore low coverage and unmet need for contraception among Malagasy students in Antananarivo. Instead, they would rather rely heavily on traditional methods such as periodic abstinence or the calendar method. Moreover, due to the risk of unwanted pregnancy, menstruation is central to the moral control of own and other's sexual behaviour at both a personal and a collective level.
The criteria for patient shifting as defined above apply to 26 out of 95 risk groups. At the level of risk groups hardly any patient shifting into ambulatory care was detected. On average for each patient with the respective risk factors 0.6 additional cases in ambulatory care were estimated as result of reduced incidence of inpatient care. In total the additional cost associated with patient shifting from inpatient care to ambulatory care was estimated 424 million € (2007). This represents 1.5% of total spending on ambulatory care and underlines the importance of the issue to health services research. Roughly 80% of this amount is likely to be eligible to physician services relevant to morbidity adjusted targets under payment reform. Prior to implementation as a payment formula, however, the approach needs to be based on a comprehensive risk adjustment model and needs further refinement.
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